CN114967057A - Optical imaging lens group - Google Patents
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- CN114967057A CN114967057A CN202210630171.7A CN202210630171A CN114967057A CN 114967057 A CN114967057 A CN 114967057A CN 202210630171 A CN202210630171 A CN 202210630171A CN 114967057 A CN114967057 A CN 114967057A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B30/00—Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles
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- Optics & Photonics (AREA)
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Abstract
The application discloses an optical imaging lens group. The optical imaging lens group is provided with a plurality of lenses, and the plurality of lenses sequentially comprise from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens having optical power. At least four lenses in the plurality of lenses are meniscus lenses with different surface types of an object side and an image side; at least one of the plurality of lenses has an optical power different from the optical power of its adjacent lens by positive and negative properties; the optical imaging lens group is suitable for being attached to the object side of the camera lens, and the optical imaging lens group satisfies the following conditions: and TD1/f is more than 6.0, wherein TD1 is the distance on the optical axis from the object side surface of the first lens to the image side surface of the lens which is closest to the image side in the plurality of lenses, and f is the combined effective focal length of the optical imaging lens group and the image pickup lens.
Description
Technical Field
The application relates to the field of optical elements, in particular to an optical imaging lens group.
Background
With the vigorous development of portable electronic products such as smart phones, smart phones and the like have become multifunctional integrated intelligent devices, and particularly, the photographing and photographing functions of the smart phones play an important role in improving the product competitiveness. In general, the main function of photographing and shooting is a camera lens built in a mobile phone. With the increasing improvement of mobile phone shooting quality, mobile phone shooting and shooting gradually become a main way and a main mode for users to shoot and shoot.
However, as smart phones and the like gradually tend to be light and thin, the volume of the built-in camera lens is smaller and smaller, the magnification is limited to a certain extent, and clear imaging may not be achieved when a long-range view is shot. Therefore, how to realize a long-range view of a clear picture captured by a portable electronic product such as a smart phone while ensuring the miniaturization of the built-in camera lens has become one of the problems to be solved by many lens designers.
Disclosure of Invention
An aspect of the present application provides an optical imaging lens assembly having a plurality of lenses, in order from an object side to an image side along an optical axis, comprising: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens having optical power. At least four lenses in the plurality of lenses are meniscus lenses with different surface types of an object side and an image side; at least one of the plurality of lenses has an optical power different from the optical power of its adjacent lens by a positive or negative property. The optical imaging lens group is suitable for being attached to the object side of the camera lens, and the optical imaging lens group can satisfy the following conditions: and TD1/f is more than 6.0, wherein TD1 is the distance on the optical axis from the object side surface of the first lens to the image side surface of the lens which is closest to the image side in the plurality of lenses, and f is the combined effective focal length of the optical imaging lens group and the image pickup lens.
In one embodiment, at least one mirror surface of the object side surface of the first lens to the image side surface of the eighth lens is an aspherical mirror surface.
In one embodiment, the image pickup lens includes a first built-in lens, a second built-in lens, a third built-in lens, a fourth built-in lens, a fifth built-in lens and a sixth built-in lens having power along an optical axis, wherein TTL/f + f/EPD >9.0, where TTL is a distance on the optical axis from an object side surface of the first lens to an imaging surface of the image pickup lens, f is a combined effective focal length of the optical imaging lens group and the image pickup lens, and EPD is an entrance pupil diameter of the image pickup lens.
In one embodiment, at least one mirror surface of the object side surface of the first built-in lens to the image side surface of the sixth built-in lens is an aspherical mirror surface.
In one embodiment, TD2/f < 1.0, where TD2 is the distance on the optical axis from the object side surface of the first internal lens to the image side surface of the sixth internal lens, and f is the combined effective focal length of the optical imaging lens group and the image capture lens.
In one embodiment, the optical imaging lens group may satisfy: 0.5 < f12/f3 < 2.0, wherein f12 is the combined focal length of the first and second lenses and f3 is the effective focal length of the third lens.
In one embodiment, the optical imaging lens group may satisfy: -1.5 < (f5+ f6)/(f5-f6) < 1.5, wherein f5 is the effective focal length of the fifth lens and f6 is the effective focal length of the sixth lens.
In one embodiment, the plurality of lenses further includes a ninth lens and a tenth lens disposed along the optical axis. The optical imaging lens group can satisfy: 0 < f7/f10 < 1.5, wherein f7 is the effective focal length of the seventh lens, and f10 is the effective focal length of the tenth lens.
In one embodiment, the optical imaging lens group may satisfy: -1.0 < R2/R1-R3/R4 < 0, wherein R1 is the radius of curvature of the object-side surface of the first lens, R2 is the radius of curvature of the image-side surface of the first lens, R3 is the radius of curvature of the object-side surface of the second lens, and R4 is the radius of curvature of the image-side surface of the second lens.
In one embodiment, the optical imaging lens group may satisfy: -2.0 < R2/R1+ (R3-R4)/(R3+ R4) < 0, wherein R1 is the radius of curvature of the object-side surface of the first lens, R2 is the radius of curvature of the image-side surface of the first lens, R3 is the radius of curvature of the object-side surface of the second lens, and R4 is the radius of curvature of the image-side surface of the second lens.
In one embodiment, the optical imaging lens group may satisfy: 0 < (R7+ R8)/(R9+ R10) < 1.0, where R7 is a radius of curvature of an object-side surface of the fourth lens, R8 is a radius of curvature of an image-side surface of the fourth lens, R9 is a radius of curvature of an object-side surface of the fifth lens, and R10 is a radius of curvature of an image-side surface of the fifth lens.
In one embodiment, the optical imaging lens group may satisfy: 0 < R14/R13+ R16/R15 < 5.0, where R13 is the radius of curvature of the object-side surface of the seventh lens, R14 is the radius of curvature of the image-side surface of the seventh lens, R15 is the radius of curvature of the object-side surface of the eighth lens, and R16 is the radius of curvature of the image-side surface of the eighth lens.
In one embodiment, the first lens and the second lens are cemented to form a cemented lens. The optical imaging lens group can satisfy: 0 < (CT1+ CT2)/T23 < 1.0. Where CT1 is the center thickness of the first lens on the optical axis, CT2 is the center thickness of the second lens on the optical axis, and T23 is the air space between the second lens and the third lens on the optical axis.
In one embodiment, the optical imaging lens group may satisfy: (T45+ CT5)/(T56+ CT6) < 1.5, where CT5 is the center thickness of the fifth lens on the optical axis, CT6 is the center thickness of the sixth lens on the optical axis, T45 is the air space of the fourth lens and the fifth lens on the optical axis, and T56 is the air space of the fifth lens and the sixth lens on the optical axis.
In one embodiment, the optical imaging lens group may satisfy: Σ CTi/maxAT < 8.0, where Σ CTi is a sum of center thicknesses of all of the lenses in the plurality of lenses on the optical axis, and maxAT is a maximum value in an air interval of any adjacent two lenses in the plurality of lenses on the optical axis.
In one embodiment, the optical imaging lens group may satisfy: and 0 & ltBFL/Tab & lt 1.0, wherein BFL is the distance on the optical axis from the image side surface of the sixth built-in lens to the imaging surface of the camera lens, and Tab is the distance on the optical axis from the image side surface of the lens closest to the image side in the plurality of lenses to the object side surface of the first built-in lens.
In one embodiment, the eighth lens and the ninth lens have powers different in positive and negative properties; and at least one mirror surface of at least one of the plurality of lenses is a spherical mirror surface made of plastic.
In one embodiment, the optical imaging lens group may satisfy: TTL2/f < 1.0, wherein TTL2 is the distance on the optical axis from the object side surface of the first built-in lens to the imaging surface of the camera lens, and f is the combined effective focal length of the optical imaging lens group and the camera lens.
In one embodiment, the sixth lens is a meniscus lens with an object side and an image side having different profiles; and the seventh lens is a meniscus lens with an object side and an image side having different surface types.
In one embodiment, the first lens has a positive optical power, and the object side surface is convex and the image side surface is convex; the third lens has positive focal power, the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a convex surface; and the object side surface of the fourth lens is a convex surface, and the image side surface of the fourth lens is a concave surface.
In one embodiment, the fifth lens element has a negative power, and has a convex object-side surface and a concave image-side surface; and the sixth lens has a positive optical power.
In one embodiment, at least one lens in the imaging lens is an aspherical lens made of glass.
In the exemplary embodiments of the present application, the optical imaging lens group can be used as an afocal lens group by appropriately setting the power and the surface type characteristics of the lenses in the optical imaging lens group. Illustratively, at least four lenses in the plurality of lenses are meniscus lenses with different surface types on the object side surface and the image side surface, at least one lens in the plurality of lenses and the adjacent lens have different optical powers with positive and negative properties, and the design of the surface type and the optical power is beneficial to enabling the optical imaging lens group to be in a symmetrical structure, and the distortion and the chromatic aberration of magnification of the optical imaging lens group can be reduced. Illustratively, the optical imaging lens group satisfies TD1/f > 6.0, and the length of the optical imaging lens group can be reduced on the premise of ensuring that the optical imaging lens group has certain magnification, so that the optical imaging lens group is convenient to carry.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
fig. 1 shows a schematic structural view of an optical imaging lens group and an image pickup lens combination according to embodiment 1 of the present application;
fig. 2A to 2C show an on-axis chromatic aberration curve, an astigmatism curve, and a distortion curve, respectively, of the optical imaging lens group and image pickup lens combination of embodiment 1;
fig. 3 shows a schematic structural view of an optical imaging lens group and image pickup lens combination according to embodiment 2 of the present application;
fig. 4A to 4C show an on-axis chromatic aberration curve, an astigmatism curve, and a distortion curve, respectively, of the optical imaging lens group and image pickup lens combination of embodiment 2;
fig. 5 shows a schematic structural view of an optical imaging lens group and image pickup lens combination according to embodiment 3 of the present application;
fig. 6A to 6C show an on-axis chromatic aberration curve, an astigmatism curve, and a distortion curve, respectively, of the optical imaging lens group and image pickup lens combination of embodiment 3;
fig. 7 shows a schematic structural view of an optical imaging lens group and imaging lens assembly according to embodiment 4 of the present application;
fig. 8A to 8C show an on-axis chromatic aberration curve, an astigmatism curve, and a distortion curve, respectively, of the optical imaging lens group and image pickup lens combination of embodiment 4;
fig. 9 shows a schematic configuration diagram of an optical imaging lens group and imaging lens assembly according to embodiment 5 of the present application;
fig. 10A to 10C show an on-axis chromatic aberration curve, an astigmatism curve, and a distortion curve, respectively, of the optical imaging lens group and image pickup lens combination of embodiment 5;
fig. 11 is a schematic structural view showing a combination of an optical imaging lens group and an image pickup lens according to embodiment 6 of the present application;
fig. 12A to 12C show an on-axis chromatic aberration curve, an astigmatism curve, and a distortion curve, respectively, of the optical imaging lens group and image pickup lens combination of embodiment 6;
fig. 13 is a schematic structural view showing a combination of an optical imaging lens group and an image pickup lens according to embodiment 7 of the present application;
fig. 14A to 14C show an on-axis chromatic aberration curve, an astigmatism curve, and a distortion curve, respectively, of the optical imaging lens group and image pickup lens combination of example 7.
Fig. 15 is a schematic structural view showing a combination of an optical imaging lens group and an image pickup lens according to embodiment 8 of the present application;
fig. 16A to 16C show an on-axis chromatic aberration curve, an astigmatism curve, and a distortion curve, respectively, of the optical imaging lens group and image pickup lens combination of embodiment 8; and
fig. 17 shows a schematic configuration diagram of an imaging lens according to an exemplary embodiment of the present application.
Detailed Description
For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the present application and does not limit the scope of the present application in any way. Like reference numerals refer to like elements throughout the specification. The expression "and/or" includes any and all combinations of one or more of the associated listed items.
It should be noted that in this specification, the expressions first, second, third, etc. are used only to distinguish one feature from another, and do not represent any limitation on the features. Thus, the first lens discussed below may also be referred to as the second lens or the third lens, and the first lens insert may also be referred to as the second lens insert or the third lens insert without departing from the teachings of the present application.
In the drawings, the thickness, size, and shape of the lens have been slightly exaggerated for convenience of explanation. In particular, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shape of the spherical surface or the aspherical surface is not limited to the shape of the spherical surface or the aspherical surface shown in the drawings. The figures are purely diagrammatic and not drawn to scale.
Herein, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object is called the object side surface of the lens, and the surface of each lens closest to the imaging surface is called the image side surface of the lens.
It will be further understood that the terms "comprises," "comprising," "has," "having," "includes" and/or "including," when used in this specification, specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof. Moreover, when a statement such as "at least one of" appears after a list of listed features, the entirety of the listed features is modified rather than modifying individual elements in the list. Furthermore, when describing embodiments of the present application, the use of "may" mean "one or more embodiments of the present application. Also, the term "exemplary" is intended to refer to an example or illustration.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
The features, principles, and other aspects of the present application are described in detail below.
An optical imaging lens group according to an exemplary embodiment of the present application may include a plurality of lenses. The plurality of lenses may be arranged in order from an object side to an image side along an optical axis. The plurality of lenses may include eight lenses having optical powers, which are a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens, respectively. The eight lenses are arranged in order from the object side to the image side along the optical axis. Any adjacent two lenses of the first lens to the eighth lens may have a spacing distance therebetween. In another embodiment, the plurality of lenses may include ten lenses having optical power, which are a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, and a tenth lens, respectively. The ten lenses are arranged in order from the object side to the image side along the optical axis. Any adjacent two lenses of the first lens to the tenth lens may have a spacing distance therebetween. In another embodiment, the plurality of lenses may include eleven lenses having optical powers, which are a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, a tenth lens, and an eleventh lens, respectively. The eleven lenses are arranged in order from an object side to an image side along an optical axis. Any adjacent two lenses of the first lens to the eleventh lens may have a spacing distance therebetween.
According to an exemplary embodiment of the present application, an optical imaging lens group may be adapted to be attached to an object side of an image pickup lens. The imaging lens may include six lenses having refractive power, which are a first built-in lens, a second built-in lens, a third built-in lens, a fourth built-in lens, a fifth built-in lens, and a sixth built-in lens, respectively. The six lenses are arranged along the optical axis in sequence from the object side to the image side. Any adjacent two lenses of the first to sixth built-in lenses may have a spacing distance therebetween. According to an exemplary embodiment of the present application, the optical imaging lens group may be an afocal lens group, which may be used to achieve the effect of varying magnification. The imaging lens may be a telephoto lens, which may be mounted in a portable electronic device such as a mobile phone. The imaging lens may be a main imaging lens, a wide-angle lens, or the like, and may be mounted in a portable electronic device such as a mobile phone. In the application, the optical imaging lens group can be connected with the camera lens to enlarge the magnification of the camera lens, so that the mobile phone lens can shoot pictures farther away. In other words, the optical imaging lens group may be an external lens of a mobile phone or the like.
In an exemplary embodiment, at least four of the plurality of lenses are meniscus lenses, which may have different profiles of object side and image side. In other words, the object side surface and the image side surface of at least four lenses of the plurality of lenses may have surface shapes with convexities and concavities opposite to each other. At least one of the plurality of lenses has an optical power different from the optical power of its adjacent lens by a positive or negative property. In other words, at least one of the plurality of lenses has opposite positive and negative powers with its lens adjacent to the object or image side surface. The design of the surface shape and the focal power is beneficial to enabling a plurality of lenses to be in a symmetrical structure, and the distortion and the chromatic aberration of magnification of the plurality of lenses can be reduced. When the optical imaging lens group is connected with the camera lens, the influence on the image quality of the camera lens can be reduced, so that the overall photographing effect of the optical imaging lens group and the camera lens is improved.
In an exemplary embodiment, an optical imaging lens group according to the present application may satisfy: and TD1/f is more than 6.0, wherein TD1 is the distance between the object side surface of the first lens and the image side surface of the lens closest to the image side in the plurality of lenses on the optical axis, and f is the combined effective focal length of the optical imaging lens group and the image pickup lens. TD1/f is more than 6.0, and the length of the lenses can be reduced on the premise of ensuring that the lenses have certain magnification, so that the portable outdoor lens is convenient to carry.
In an exemplary embodiment, an optical imaging lens group according to the present application may satisfy: TTL/f + f/EPD is more than 9.0, wherein TTL is the distance between the object side surface of the first lens and the imaging surface of the camera lens on the optical axis, f is the combined effective focal length of the optical imaging lens group and the camera lens, and EPD is the entrance pupil diameter of the camera lens. The TTL/f + f/EPD is more than 9.0, so that a plurality of lenses have certain magnification, and the optical imaging lens group and the camera lens can shoot objects at farther positions. By controlling the distribution of the lenses in the plurality of lenses, the plurality of lenses can be made to be an afocal lens group, so that the lens can be used for the external hanging lenses of most mobile phones, and the universality of the external hanging lenses is improved.
In an exemplary embodiment, an optical imaging lens group according to the present application may satisfy: TD2/f < 1.0, wherein TD2 is the distance on the optical axis from the object side surface of the first built-in lens to the image side surface of the sixth built-in lens, and f is the combined effective focal length of the optical imaging lens group and the image pickup lens. More specifically, TDs 2 and f further may satisfy: TD2/f is less than 0.5. Satisfying TD2/f < 1.0 makes it possible to make the camera lens thinner, and thus to reduce the thickness of an apparatus such as a mobile phone on which the camera lens is mounted.
In an exemplary embodiment, an optical imaging lens group according to the present application may satisfy: 0.5 < f12/f3 < 2.0, wherein f12 is the combined focal length of the first and second lenses and f3 is the effective focal length of the third lens. More specifically, f12 and f3 may further satisfy: f12/f3 is more than 1.0 and less than 2.0. Satisfying 0.5 < f12/f3 < 2.0, the effective apertures of the first lens, the second lens, and the third lens can be reduced, thereby reducing the heights of the plurality of lenses.
In an exemplary embodiment, an optical imaging lens group according to the present application may satisfy: -1.5 < (f5+ f6)/(f5-f6) < 1.5, wherein f5 is the effective focal length of the fifth lens and f6 is the effective focal length of the sixth lens. More specifically, f5 and f6 may further satisfy: -1.0 < (f5+ f6)/(f5-f6) < 1.0. Satisfies-1.5 < (f5+ f6)/(f5-f6) < 1.5, and the inclination angles of the fifth lens and the sixth lens can be controlled, which is favorable for molding the two lenses.
In an exemplary embodiment, an optical imaging lens group according to the present application may satisfy: 0 < f7/f10 < 1.5, where f7 is the effective focal length of the seventh lens and f10 is the effective focal length of the tenth lens. Satisfying 0 < f7/f10 < 1.5 is beneficial to controlling the calibers of the rear ends of the lenses, thereby controlling the barrel heights of the lenses.
In an exemplary embodiment, an optical imaging lens group according to the present application may satisfy: -1.0 < R2/R1-R3/R4 < 0, wherein R1 is the radius of curvature of the object-side surface of the first lens, R2 is the radius of curvature of the image-side surface of the first lens, R3 is the radius of curvature of the object-side surface of the second lens, and R4 is the radius of curvature of the image-side surface of the second lens. The optical imaging lens group satisfies the conditions that R2/R1-R3/R4 is less than 0 and the difference between the curvatures of the object side surface and the image side surface of the first lens is small, and the difference between the curvatures of the object side surface and the image side surface of the second lens is large, so that the focal length of the first lens is small, and the light gathering capacity of the optical imaging lens group is increased.
In an exemplary embodiment, an optical imaging lens group according to the present application may satisfy: -2.0 < R2/R1+ (R3-R4)/(R3+ R4) < 0, wherein R1 is the radius of curvature of the object-side surface of the first lens, R2 is the radius of curvature of the image-side surface of the first lens, R3 is the radius of curvature of the object-side surface of the second lens, and R4 is the radius of curvature of the image-side surface of the second lens. Satisfies-2.0 < R2/R1+ (R3-R4)/(R3+ R4) < 0, and can control the inclination angle and caliber size of the first lens and the second lens, thereby being beneficial to the molding of the two lenses.
In an exemplary embodiment, an optical imaging lens group according to the present application may satisfy: 0 < (R7+ R8)/(R9+ R10) < 1.0, where R7 is a radius of curvature of an object-side surface of the fourth lens, R8 is a radius of curvature of an image-side surface of the fourth lens, R9 is a radius of curvature of an object-side surface of the fifth lens, and R10 is a radius of curvature of an image-side surface of the fifth lens. Satisfy 0 < (R7+ R8)/(R9+ R10) < 1.0, can make the curvature of fourth lens and fifth lens similar, and then be favorable to the structure to pile up.
In an exemplary embodiment, an optical imaging lens group according to the present application may satisfy: 0 < R14/R13+ R16/R15 < 5.0, where R13 is the radius of curvature of the object-side surface of the seventh lens, R14 is the radius of curvature of the image-side surface of the seventh lens, R15 is the radius of curvature of the object-side surface of the eighth lens, and R16 is the radius of curvature of the image-side surface of the eighth lens. More specifically, R14, R13, R16 and R15 may further satisfy: 1.0 < R14/R13+ R16/R15 < 4.0. Satisfying 0 < R14/R13+ R16/R15 < 5.0, the shape of the seventh lens and the eighth lens can be changed in a wide range, so that more selectivity in structural arrangement is achieved.
In an exemplary embodiment, the first lens and the second lens may be cemented to form a cemented lens. The optical imaging lens group according to the present application can satisfy: 0 < (CT1+ CT2)/T23 < 1.0. Where CT1 is the center thickness of the first lens on the optical axis, CT2 is the center thickness of the second lens on the optical axis, and T23 is the air space between the second lens and the third lens on the optical axis. The requirement of 0 < (CT1+ CT2)/T23 < 1.0 can control the light-gathering capacity of the cemented lens and the power distribution of the cemented lens and the subsequent lenses, and is favorable for correcting chromatic aberration of a plurality of lenses.
In an exemplary embodiment, an optical imaging lens group according to the present application may satisfy: (T45+ CT5)/(T56+ CT6) < 1.5, where CT5 is the center thickness of the fifth lens on the optical axis, CT6 is the center thickness of the sixth lens on the optical axis, T45 is the air space of the fourth lens and the fifth lens on the optical axis, and T56 is the air space of the fifth lens and the sixth lens on the optical axis. The requirement of (T45+ CT5)/(T56+ CT6) < 1.5 is met, the manufacturability of the fifth lens and the sixth lens is favorably improved, the trend of light rays passing through the fourth lens and then reaching the sixth lens is favorably controlled, the multiple lenses are favorably designed symmetrically, and the aberration of the multiple lenses is favorably corrected.
In an exemplary embodiment, an optical imaging lens group according to the present application may satisfy: Σ CTi/maxAT < 8.0, where Σ CTi is a sum of center thicknesses of all of the lenses in the plurality of lenses on the optical axis, and maxAT is a maximum value in an air interval of any adjacent two lenses in the plurality of lenses on the optical axis. More specifically, Σ CTi and maxAT may further satisfy: sigma CTi/maxAT is less than 3.0. The requirement that the Sigma CTi/MaxAT is less than 8.0 is met, the thicknesses of the lenses can be controlled, the total length of the lenses is small, and the spacing distance between the lenses in the lenses can be controlled to reduce the risk of collision between the lenses.
In an exemplary embodiment, an optical imaging lens group according to the present application may satisfy: and 0 & ltBFL/Tab & lt 1.0, wherein BFL is the distance on the optical axis from the image side surface of the sixth built-in lens to the imaging surface of the camera lens, and Tab is the distance on the optical axis from the image side surface of the lens closest to the image side in the plurality of lenses to the object side surface of the first built-in lens. More specifically, BFL and Tab may further satisfy: BFL/Tab is more than 0 and less than 0.5. The distance between the optical imaging lens group (such as an external lens) and the camera lens (such as a mobile phone lens) can be controlled to facilitate the splicing of the external lens and the mobile phone lens so as to work normally, and the distance between the sensor and the mobile phone lens barrel can be controlled to facilitate the normal work of the mobile phone lens.
In an exemplary embodiment, the eighth lens and the ninth lens may have optical powers having different positive and negative properties. In other words, the eighth lens and the ninth lens may have opposite powers. This facilitates the distribution of the effective focal lengths of the respective lenses among the plurality of lenses, and facilitates the correction of aberrations.
In an exemplary embodiment, the at least one mirror surface of the at least one lens of the plurality of lenses may be a spherical mirror surface of a plastic material. This is advantageous in reducing the sensitivity of the lenses among the plurality of lenses, thereby facilitating assembly and mass production.
In an exemplary embodiment, an optical imaging lens group according to the present application may satisfy: TTL2/f < 1.0, wherein TTL2 is the distance on the optical axis from the object side surface of the first built-in lens to the imaging surface of the camera lens, and f is the combined effective focal length of the optical imaging lens group and the camera lens. More specifically, TTL2 and f further can satisfy: TTL2/f is less than 0.5. The requirements that TTL2/f is less than 1.0 are met, the effective focal length of the combination of the optical imaging lens group and the camera lens is increased, and the magnification of the optical imaging lens group and the camera lens is increased.
In an exemplary embodiment, the sixth lens may be a meniscus lens having a different profile of the object side and the image side; and the seventh lens may be a meniscus lens having a different profile of the object side and the image side. In other words, the object-side surface and the image-side surface of the sixth lens may have convexities and concavities of opposite surface types, and the object-side surface and the image-side surface of the seventh lens may have convexities and concavities of opposite surface types. Therefore, the direction of light rays can be controlled, and the aberration of the optical imaging lens group can be corrected.
In an exemplary embodiment, the first lens may have a positive optical power, and the object-side surface thereof may be convex and the image-side surface thereof may be convex; the third lens can have positive focal power, and the object side surface of the third lens can be a convex surface, and the image side surface of the third lens can be a convex surface; and the object side surface of the fourth lens element can be convex, and the image side surface can be concave. This arrangement of power and profile is beneficial for converging light.
In an exemplary embodiment, the fifth lens element may have a negative optical power, and the object-side surface thereof may be convex and the image-side surface thereof may be concave; and the sixth lens may have a positive optical power. The arrangement of the focal power and the surface type of the fifth lens and the sixth lens is beneficial to diverging the light rays converged by the front four lenses, so that the lenses are in a symmetrical structure and are beneficial to eliminating aberration.
In an exemplary embodiment, at least one built-in lens in the imaging lens may be an aspherical lens made of glass. This is advantageous in reducing the influence of temperature on imaging performance in the imaging lens.
In an exemplary embodiment, the combined effective focal length f of the optical imaging lens group and the image pickup lens may be in the range of 21mm to 25 mm; the effective focal length f3 of the third lens can be in the range of 130 mm-150 mm; the effective focal length f5 of the fifth lens can be in the range of-330 mm to-120 mm; the effective focal length f7 of the seventh lens can be in the range of 18 mm-81 mm; and the effective focal length f10 of the tenth lens may be in the range of 65mm to 96 mm; and the effective focal length f11 of the eleventh lens may be in the range of 70mm to 90 mm.
In an exemplary embodiment, TTL, which is a distance on the optical axis from the object side surface of the first lens to the image plane of the image pickup lens, may be in a range of 175mm to 190 mm; the ImgH which is half of the diagonal length of an effective pixel area on an imaging surface of the camera lens can be within the range of 2.5 mm-3.5 mm; the Semi-FOV of the maximum field angle of the combination of the optical imaging lens group and the camera lens can be within the range of 6-9 degrees; and the aperture value Fno of the camera lens can be within the range of 2.0-2.3.
In an exemplary embodiment, an imaging lens according to the present application further includes a stop disposed between the object side and the first built-in lens. Alternatively, the above-described image pickup lens may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element located on an image forming surface. The application provides an optical imaging lens group with characteristics of long focus, large magnification, high imaging quality and the like. The camera lens according to the above embodiment of the present application can be mounted on a mobile phone, and the optical imaging lens group can be used as an external lens of the camera lens of the mobile phone, so that the magnification of the lens can be increased and the shooting quality of the mobile phone can be improved on the basis of not increasing the thickness of the mobile phone. By reasonably distributing the number of lenses, focal power, surface type, material, center thickness of each lens, axial distance between each lens and the like in the optical imaging lens group, incident light can be effectively converged, the optical total length of a mobile phone lens is reduced, the processability of the optical imaging lens group is improved, and the optical imaging lens group is more favorable for production and processing.
In the embodiment of the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface, that is, at least one of the object-side surface of the first lens to the image-side surface of the sixth built-in lens is an aspherical mirror surface. The aspheric lens is characterized in that: the curvature varies continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has better curvature radius characteristics, and has advantages of improving distortion aberration and improving astigmatic aberration. After the aspheric lens is adopted, the aberration generated during imaging can be eliminated as much as possible, thereby improving the imaging quality. Optionally, at least one of an object-side surface and an image-side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, the eighth lens, the ninth lens, the tenth lens, the eleventh lens, the first built-in lens, the second built-in lens, the third built-in lens, the fourth built-in lens, the fifth built-in lens, and the sixth built-in lens is an aspherical mirror surface. Optionally, each of the third lens, the fourth lens, the fifth lens, the eighth lens and the ninth lens has an object-side surface and an image-side surface which are aspheric mirror surfaces. Optionally, each of the object-side surface and the image-side surface of each of the first built-in lens, the second built-in lens, the third built-in lens, the fourth built-in lens, the fifth built-in lens, and the sixth built-in lens is an aspheric mirror surface.
However, it will be appreciated by those skilled in the art that the number of lenses constituting the optical imaging lens group can be varied to achieve the various results and advantages described in the present specification without departing from the claimed subject matter. For example, although the optical imaging lens group and the image pickup lens are described as including 16 or 17 lenses in total in the embodiment, the optical imaging lens group and the image pickup lens are not limited to including 16 or 17 lenses. The optical imaging lens group and the image pickup lens may further include other numbers of lenses, if necessary.
Specific examples of an optical imaging lens group and an image pickup lens applicable to the above-described embodiments are further described below with reference to the drawings.
Example 1
An optical imaging lens group and an imaging lens according to embodiment 1 of the present application are described below with reference to fig. 1 to 2C. Fig. 1 shows a schematic configuration diagram of an optical imaging lens group and imaging lens assembly according to embodiment 1 of the present application.
As shown in fig. 1, the optical imaging lens group G1 includes, in order from an object side to an image side, a plurality of lenses, for example, a first lens element E1, a second lens element E2, a third lens element E3, a fourth lens element E4, a fifth lens element E5, a sixth lens element E6, a seventh lens element E7, an eighth lens element E8, a ninth lens element E9 and a tenth lens element E10. Referring to fig. 17, the imaging lens G2 may sequentially include along the optical axis: a stop STO, a first built-in lens E1 ', a second built-in lens E2', a third built-in lens E3 ', a fourth built-in lens E4', a fifth built-in lens E5 ', a sixth built-in lens E6', a filter E7 ', and an image plane S15'.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a convex image-side surface S2. The second lens element E2 has negative power, and has a concave object-side surface S2 and a convex image-side surface S3. The third lens element E3 has positive power, and has a convex object-side surface S4 and a convex image-side surface S5. The fourth lens element E4 has negative power, and has a convex object-side surface S6 and a concave image-side surface S7. The fifth lens element E5 has negative power, and has a convex object-side surface S8 and a concave image-side surface S9. The sixth lens element E6 has positive power, and has a convex object-side surface S10 and a concave image-side surface S11. The seventh lens element E7 has positive power, and has a concave object-side surface S12 and a convex image-side surface S13. The eighth lens element E8 has negative power, and has a concave object-side surface S14 and a convex image-side surface S15. The ninth lens element E9 has positive power, and has a convex object-side surface S16 and a convex image-side surface S17. The tenth lens element E10 has positive power, and has a concave object-side surface S18 and a convex image-side surface S19. Illustratively, the first lens E1 and the second lens E2 may be cemented to form a cemented lens. Light from the object sequentially passes through the respective surfaces S1 to S19 and is taken into the object side surface S1 'of the first built-in lens E1' in the photographing lens G2 through the stop STO.
The object-side surface S1 ' and the image-side surface S2 ' of the first lens element E1 ' are convex. The object side surface S3 ' and the image side surface S4 ' of the second built-in lens E2 ' are concave. The object-side surface S5 ' and the image-side surface S6 ' of the third built-in lens E3 ' are convex and concave. The object-side surface S7 ' and the image-side surface S8 ' of the fourth built-in lens E4 ' are convex and concave. The object-side surface S9 ' and the image-side surface S10 ' of the fifth built-in lens E5 ' are convex. The object-side surface S11 ' and the image-side surface S12 ' of the sixth built-in lens element E6 ' are convex and concave. Filter E7 ' has an object side S13 ' and an image side S14 '. The light from the optical imaging lens group G1 passes through the respective surfaces S1 ' to S14 ' in order and is finally imaged on the imaging surface S15 '.
Table 1-1 shows a basic parameter table of the optical imaging lens group of example 1, in which the units of the radius of curvature, thickness/distance, and focal length are millimeters (mm).
TABLE 1-1
Tables 1 to 2 show basic parameter tables of the imaging lens of embodiment 1, in which the unit of the radius of curvature and the thickness/distance are both millimeters (mm).
Tables 1 to 2
In the present example, the combined focal length f12 of the first lens E1 and the second lens E2 is 184.24mm, the combined effective focal length f of the optical imaging lens group and the imaging lens is 22.21mm, the total length of the optical imaging lens group and the imaging lens (i.e., the distance on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S15 'of the imaging lens G2) TTL is 189.01mm, the half ImgH of the diagonal length of the effective pixel region on the imaging surface S15' of the imaging lens G2 is 2.60mm, the half semifov of the maximum field angle of the optical imaging lens group and the imaging lens combination is 6.4 °, and the ratio f/EPD of the combined effective focal length f of the optical imaging lens group and the imaging lens to the entrance pupil diameter of the imaging lens is 2.09.
In embodiment 1, the object-side surface and the image-side surface of any one of the third lens E3 to the fifth lens E5, the seventh lens E7 to the ninth lens E9, and the object-side surface S18 of the tenth lens E10 are all aspheric. The object-side surface S1 'of the first built-in lens E1' to the image-side surface S12 'of the sixth built-in lens E6' are also aspheric. The profile x of each aspheric lens can be defined using, but not limited to, the following aspheric equation:
wherein x is the rise of the distance from the aspheric surface vertex to the aspheric surface vertex when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c being 1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1 above); k is a conic coefficient; ai is the correction coefficient of the i-th order of the aspherical surface. The following Table 2-1 shows the coefficients A of the high-order terms which can be used for the aspherical mirror surfaces S4 to S9 and S12 to S18 in example 1 4 、A 6 、A 8 And A 10 . The high-order term coefficients A that can be used for the aspherical mirror surfaces S1 '-S12' in example 1 are shown in the following tables 2-2 and 2-3 4 、A 6 、A 8 、A 10 、A 12 、A 14 、A 16 、A 18 、A 20 、A 22 、A 24 、A 26 、A 28 And A 30 。
| Flour mark | A4 | A6 | A8 | A10 |
| S4 | 6.6248E-07 | 1.6364E-09 | -6.9431E-10 | -3.7860E-11 |
| S5 | -1.8752E-06 | 1.0785E-09 | -8.7963E-10 | -4.3601E-11 |
| S6 | -7.7769E-08 | -1.8120E-07 | 3.7625E-09 | -7.4301E-11 |
| S7 | -9.6306E-08 | 1.7309E-07 | -4.5855E-09 | 1.9834E-11 |
| S8 | -5.1957E-06 | 1.8332E-07 | -3.5969E-09 | 4.1906E-11 |
| S9 | 4.2119E-06 | -3.7311E-07 | 5.0681E-09 | -1.4489E-11 |
| S12 | -4.1049E-05 | 1.8431E-08 | -6.1089E-09 | 9.7956E-11 |
| S13 | 1.9987E-05 | -1.2693E-07 | 4.1191E-09 | 1.6298E-11 |
| S14 | 9.2177E-06 | 1.2176E-07 | -1.5239E-09 | 9.4307E-12 |
| S15 | -9.3424E-06 | -1.0182E-07 | 1.3599E-09 | -8.5373E-12 |
| S16 | 4.9683E-06 | 2.2539E-07 | 9.3703E-10 | 4.3532E-13 |
| S17 | 1.7379E-05 | -1.6402E-07 | -1.9242E-10 | 1.2103E-10 |
| S18 | -7.2257E-05 | -1.3437E-06 | 7.4245E-08 | -6.4036E-10 |
TABLE 2-1
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1' | 6.8385E-01 | -8.1382E-02 | 1.3623E-02 | -5.2193E-03 | 1.5782E-03 | -4.1479E-04 | 1.9697E-04 |
| S2' | 4.1726E-02 | -1.3209E-04 | 4.5437E-04 | -1.2141E-03 | 5.5045E-04 | -2.4883E-04 | -5.2242E-05 |
| S3' | 2.6586E-01 | -3.0352E-03 | -2.8254E-03 | -3.7759E-04 | -5.2174E-04 | 1.3592E-04 | -1.8163E-04 |
| S4' | 2.1055E-01 | 2.8702E-02 | -6.9724E-03 | 7.0015E-05 | -1.1111E-03 | 7.4559E-05 | -8.2280E-05 |
| S5' | -9.6226E-03 | 5.0708E-02 | -5.0277E-03 | -1.3751E-03 | -1.3427E-03 | -5.7528E-04 | -2.8728E-04 |
| S6' | -1.3672E-01 | 7.0645E-03 | -7.5611E-03 | -2.3892E-03 | -1.0091E-03 | -3.2147E-04 | -7.1788E-05 |
| S7' | -3.1735E-01 | -1.2509E-02 | -5.9220E-03 | 3.5507E-04 | 5.4973E-04 | 2.6333E-04 | 6.9334E-05 |
| S8' | -4.3131E-01 | 3.0805E-02 | 4.8738E-03 | 6.3997E-03 | 3.2202E-03 | 1.6274E-03 | 6.4197E-04 |
| S9' | -5.6002E-01 | -1.6380E-03 | 9.0531E-03 | 9.1917E-03 | 5.9283E-03 | 3.0079E-03 | 8.5797E-04 |
| S10' | -6.2941E-01 | 1.6858E-02 | 1.7404E-02 | 1.1362E-02 | 3.1320E-03 | -1.1016E-03 | -2.8966E-03 |
| S11' | -1.8131E+00 | 3.8440E-01 | -6.3379E-02 | 2.7565E-02 | -6.9917E-03 | 7.3599E-04 | -1.7999E-03 |
| S12' | -1.8813E+00 | 3.4300E-01 | -8.9022E-02 | 3.7440E-02 | -9.8541E-03 | 4.8456E-03 | -1.6683E-03 |
Tables 2 to 2
Tables 2 to 3
Fig. 2A shows on-axis chromatic aberration curves for the optical imaging lens group and imaging lens combination of embodiment 1, which represent the deviation of the convergent focus of light rays of different wavelengths after passing through the lens. Fig. 2B shows an astigmatism curve representing meridional and sagittal image curvatures for the optical imaging lens group and imaging lens combination of example 1. Fig. 2C shows a distortion curve of the optical imaging lens group and imaging lens combination of embodiment 1, which represents distortion magnitude values corresponding to different image heights. As can be seen from fig. 2A to 2C, the optical imaging lens group and the imaging lens assembly according to embodiment 1 can achieve good imaging quality.
Example 2
An optical imaging lens group and an imaging lens according to embodiment 2 of the present application are described below with reference to fig. 3 to 4C. In this embodiment and the following embodiments, descriptions of parts similar to those of embodiment 1 will be omitted for the sake of brevity. Fig. 3 shows a schematic configuration diagram of an optical imaging lens group and an imaging lens according to embodiment 2 of the present application.
As shown in fig. 3, the optical imaging lens group G1 includes, in order from an object side to an image side, a plurality of lenses, for example, a first lens element E1, a second lens element E2, a third lens element E3, a fourth lens element E4, a fifth lens element E5, a sixth lens element E6, a seventh lens element E7, an eighth lens element E8, a ninth lens element E9 and a tenth lens element E10. Referring to fig. 17, the image pickup lens G2 may sequentially include along the optical axis: a stop STO, a first built-in lens E1 ', a second built-in lens E2', a third built-in lens E3 ', a fourth built-in lens E4', a fifth built-in lens E5 ', a sixth built-in lens E6', a filter E7 ', and an image plane S15'.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a convex image-side surface S2. The second lens element E2 has negative power, and has a concave object-side surface S2 and a convex image-side surface S3. The third lens element E3 has positive power, and has a convex object-side surface S4 and a convex image-side surface S5. The fourth lens element E4 has negative power, and has a convex object-side surface S6 and a concave image-side surface S7. The fifth lens element E5 has negative power, and has a convex object-side surface S8 and a concave image-side surface S9. The sixth lens element E6 has positive power, and has a convex object-side surface S10 and a concave image-side surface S11. The seventh lens element E7 has positive power, and has a concave object-side surface S12 and a convex image-side surface S13. The eighth lens element E8 has negative power, and has a concave object-side surface S14 and a convex image-side surface S15. The ninth lens element E9 has positive power, and has a convex object-side surface S16 and a convex image-side surface S17. The tenth lens element E10 has positive power, and has a concave object-side surface S18 and a convex image-side surface S19. Illustratively, the first lens E1 and the second lens E2 may be cemented to form a cemented lens. Light from the object sequentially passes through the respective surfaces S1 to S19 and is taken into the object side surface S1 'of the first built-in lens E1' in the photographing lens G2 through the stop STO.
The object-side surface S1 ' and the image-side surface S2 ' of the first lens element E1 ' are convex. The object side surface S3 ' and the image side surface S4 ' of the second built-in lens E2 ' are concave. The object-side surface S5 ' and the image-side surface S6 ' of the third built-in lens E3 ' are convex and concave. The object-side surface S7 ' and the image-side surface S8 ' of the fourth built-in lens E4 ' are convex and concave. The object-side surface S9 ' and the image-side surface S10 ' of the fifth built-in lens E5 ' are convex. The object-side surface S11 ' and the image-side surface S12 ' of the sixth built-in lens E6 ' are convex and concave. Filter E7 ' has an object side S13 ' and an image side S14 '. The light from the optical imaging lens group G1 passes through the respective surfaces S1 ' to S14 ' in order and is finally imaged on the imaging surface S15 '.
In the present example, the combined focal length f12 of the first lens E1 and the second lens E2 is 184.75mm, the combined effective focal length f of the optical imaging lens group and the imaging lens is 23.02mm, the total length TTL of the optical imaging lens group and the imaging lens is 183.58mm, the half ImgH of the diagonal length of the effective pixel region on the imaging plane S15' of the imaging lens G2 is 2.75mm, the half Semi-FOV of the maximum angle of view of the combination of the optical imaging lens group and the imaging lens is 6.6 °, and the ratio f/EPD of the combined effective focal length f of the optical imaging lens group and the imaging lens to the entrance pupil diameter EPD of the imaging lens is 2.09.
Table 3-1 shows a basic parameter table of the optical imaging lens group of embodiment 2, and table 3-2 shows a basic parameter table of the image pickup lens of embodiment 2, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm). Table 4 shows the high-order term coefficients of each aspherical mirror surface usable in the optical imaging lens group in embodiment 2, wherein each aspherical mirror surface type can be defined by formula (1) given in embodiment 1 above. The high-order coefficient of each aspherical mirror surface in the imaging lens in embodiment 2 can be seen in tables 2-2 and 2-3 in embodiment 1.
TABLE 3-1
TABLE 3-2
| Flour mark | A4 | A6 | A8 | A10 |
| S4 | 9.2921E-07 | -1.4444E-08 | -5.7820E-10 | -2.2890E-11 |
| S5 | -2.6172E-06 | -2.1967E-09 | -1.2129E-09 | -2.5688E-11 |
| S6 | -2.7891E-08 | -1.7205E-07 | 3.4846E-09 | -6.9316E-11 |
| S7 | -2.0749E-07 | 1.6493E-07 | -4.3140E-09 | 1.6830E-11 |
| S8 | -6.2585E-06 | 1.5250E-07 | -3.4276E-09 | 3.7565E-11 |
| S9 | 4.1237E-06 | -3.5933E-07 | 4.4613E-09 | -1.6367E-11 |
| S12 | -4.5410E-05 | 8.8563E-09 | -6.3464E-09 | 9.2667E-11 |
| S13 | 2.1435E-05 | -1.7320E-07 | 3.7206E-09 | 1.4132E-11 |
| S14 | 1.3658E-05 | 1.4868E-07 | -1.5185E-09 | 8.4562E-12 |
| S15 | -1.2771E-05 | -1.1765E-07 | 1.4314E-09 | -6.9962E-12 |
| S16 | 4.5494E-06 | 2.6762E-07 | 8.2897E-10 | 1.5041E-12 |
| S17 | 2.7803E-05 | -1.9417E-07 | 1.6924E-09 | 1.3751E-10 |
| S18 | -8.8325E-05 | -1.0071E-06 | 6.6227E-08 | -5.6709E-10 |
TABLE 4
Fig. 4A shows an on-axis chromatic aberration curve of the optical imaging lens group and imaging lens combination of embodiment 2, which represents the deviation of the convergent focus of light rays of different wavelengths after passing through the lens. Fig. 4B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens group and imaging lens combination of embodiment 2. Fig. 4C shows distortion curves of the optical imaging lens group and imaging lens combination of embodiment 2, which represent distortion magnitude values corresponding to different image heights. As can be seen from fig. 4A to 4C, the optical imaging lens group and the imaging lens assembly according to embodiment 2 can achieve good imaging quality.
Example 3
An optical imaging lens group and an imaging lens according to embodiment 3 of the present application are described below with reference to fig. 5 to 6C. Fig. 5 shows a schematic configuration diagram of an optical imaging lens group and imaging lens assembly according to embodiment 3 of the present application.
As shown in fig. 5, the optical imaging lens group G1 includes, in order from an object side to an image side, a plurality of lenses, for example, a first lens element E1, a second lens element E2, a third lens element E3, a fourth lens element E4, a fifth lens element E5, a sixth lens element E6, a seventh lens element E7, an eighth lens element E8, a ninth lens element E9 and a tenth lens element E10. Referring to fig. 17, the image pickup lens G2 may sequentially include along the optical axis: a stop STO, a first internal lens E1 ', a second internal lens E2', a third internal lens E3 ', a fourth internal lens E4', a fifth internal lens E5 ', a sixth internal lens E6', a filter E7 ', and an image forming surface S15'.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a convex image-side surface S2. The second lens element E2 has negative power, and has a concave object-side surface S2 and a convex image-side surface S3. The third lens element E3 has positive power, and has a convex object-side surface S4 and a convex image-side surface S5. The fourth lens element E4 has positive power, and has a convex object-side surface S6 and a concave image-side surface S7. The fifth lens element E5 has negative power, and has a convex object-side surface S8 and a concave image-side surface S9. The sixth lens element E6 has positive power, and has a convex object-side surface S10 and a concave image-side surface S11. The seventh lens element E7 has positive power, and has a concave object-side surface S12 and a convex image-side surface S13. The eighth lens element E8 has negative power, and has a concave object-side surface S14 and a convex image-side surface S15. The ninth lens element E9 has positive power, and has a convex object-side surface S16 and a convex image-side surface S17. The tenth lens element E10 has positive power, and has a convex object-side surface S18 and a concave image-side surface S19. Illustratively, the first lens E1 and the second lens E2 may be cemented to form a cemented lens. Light from the object sequentially passes through the respective surfaces S1 to S19 and is taken into the object side surface S1 'of the first built-in lens E1' in the photographing lens G2 through the stop STO.
The object-side surface S1 ' and the image-side surface S2 ' of the first lens element E1 ' are convex. The object side surface S3 ' and the image side surface S4 ' of the second built-in lens E2 ' are concave. The object-side surface S5 ' and the image-side surface S6 ' of the third lens element E3 ' are convex and concave, respectively. The object-side surface S7 ' and the image-side surface S8 ' of the fourth lens element E4 ' are convex and concave, respectively. The object-side surface S9 ' and the image-side surface S10 ' of the fifth built-in lens E5 ' are convex. The object-side surface S11 ' and the image-side surface S12 ' of the sixth built-in lens E6 ' are convex and concave. Filter E7 ' has an object side S13 ' and an image side S14 '. The light from the optical imaging lens group G1 passes through the respective surfaces S1 ' to S14 ' in order and is finally imaged on the imaging surface S15 '.
In the present example, the combined focal length f12 of the first lens E1 and the second lens E2 is 183.41mm, the combined effective focal length f of the optical imaging lens group and the image pickup lens is 24.36mm, the total length TTL of the optical imaging lens group and the image pickup lens is 178.96mm, the half ImgH of the diagonal length of the effective pixel region on the imaging plane S15' of the image pickup lens G2 is 3.10mm, the half Semi-FOV of the maximum angle of view of the combination of the optical imaging lens group and the image pickup lens is 7.0 °, and the ratio f/EPD of the combined effective focal length f of the optical imaging lens group and the image pickup lens to the entrance pupil diameter EPD of the image pickup lens is 2.09.
Table 5-1 shows a basic parameter table of the optical imaging lens group of embodiment 3, and table 5-2 shows a basic parameter table of the image pickup lens of embodiment 3, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 6 shows the high-order term coefficients that can be used for each aspherical mirror surface in the optical imaging lens group in embodiment 3, wherein each aspherical mirror surface type can be defined by the formula (1) given in embodiment 1 above. The high-order coefficient of each aspherical mirror surface in the imaging lens in embodiment 3 can be seen in tables 2-2 and 2-3 in embodiment 1.
TABLE 5-1
TABLE 5-2
| Flour mark | A4 | A6 | A8 | A10 |
| S4 | -9.2616E-07 | -5.1335E-08 | 1.6558E-10 | -1.3561E-11 |
| S5 | -4.8720E-06 | 1.8906E-08 | -2.4241E-09 | 4.8125E-12 |
| S6 | 5.7134E-07 | -1.3875E-07 | 2.0334E-09 | -4.7168E-11 |
| S7 | -1.3435E-06 | 1.1858E-07 | -2.9730E-09 | 2.4005E-12 |
| S8 | -8.7218E-06 | 4.6203E-08 | -2.0756E-09 | 2.4674E-11 |
| S9 | 4.2615E-06 | -2.7918E-07 | 2.6233E-09 | -1.2418E-11 |
| S12 | -6.3924E-05 | -2.7986E-08 | -7.0385E-09 | 7.7028E-11 |
| S13 | -1.1686E-05 | -4.4057E-07 | 3.5089E-09 | 1.0891E-11 |
| S14 | 3.4717E-05 | 1.2893E-07 | -1.8102E-09 | 7.6398E-12 |
| S15 | -2.2405E-05 | -8.7038E-08 | 1.7842E-09 | -4.9135E-12 |
| S16 | 1.0322E-05 | 3.5868E-07 | 7.5902E-11 | 1.9274E-11 |
| S17 | 5.3459E-05 | -3.7119E-07 | 1.1459E-08 | 1.2117E-10 |
| S18 | -1.0914E-04 | -1.7803E-07 | 3.1866E-08 | -3.6868E-10 |
TABLE 6
Fig. 6A shows an on-axis chromatic aberration curve of the optical imaging lens group and imaging lens combination of embodiment 3, which represents the deviation of the convergent focus of light rays of different wavelengths after passing through the lens. Fig. 6B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens group and imaging lens combination of embodiment 3. Fig. 6C shows a distortion curve of the optical imaging lens group and imaging lens combination of embodiment 3, which represents distortion magnitude values corresponding to different image heights. As can be seen from fig. 6A to 6C, the optical imaging lens group and the imaging lens assembly according to embodiment 3 can achieve good imaging quality.
Example 4
An optical imaging lens group and an imaging lens according to embodiment 4 of the present application are described below with reference to fig. 7 to 8C. Fig. 7 shows a schematic configuration diagram of an optical imaging lens group and imaging lens combination according to embodiment 4 of the present application.
As shown in fig. 7, the optical imaging lens group G1 includes, in order from an object side to an image side, a plurality of lenses, for example, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a ninth lens E9, a tenth lens E10, and an eleventh lens E11. Referring to fig. 17, the image pickup lens G2 may sequentially include along the optical axis: a stop STO, a first internal lens E1 ', a second internal lens E2', a third internal lens E3 ', a fourth internal lens E4', a fifth internal lens E5 ', a sixth internal lens E6', a filter E7 ', and an image forming surface S15'.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a convex image-side surface S2. The second lens element E2 has negative power, and has a concave object-side surface S2 and a convex image-side surface S3. The third lens element E3 has positive power, and has a convex object-side surface S4 and a convex image-side surface S5. The fourth lens element E4 has positive power, and has a convex object-side surface S6 and a concave image-side surface S7. The fifth lens element E5 has negative power, and has a convex object-side surface S8 and a concave image-side surface S9. The sixth lens element E6 has positive power, and has a concave object-side surface S10 and a convex image-side surface S11. The seventh lens element E7 has positive power, and has a convex object-side surface S12 and a concave image-side surface S13. The eighth lens element E8 has positive power, and has a concave object-side surface S14 and a convex image-side surface S15. The ninth lens element E9 has negative power, and has a concave object-side surface S16 and a convex image-side surface S17. The tenth lens element E10 has positive power, and has a convex object-side surface S18 and a convex image-side surface S19. The eleventh lens element E11 has positive power, and has a convex object-side surface S20 and a concave image-side surface S21. Illustratively, the first lens E1 and the second lens E2 may be cemented to form a cemented lens. Light from the object sequentially passes through the respective surfaces S1 to S21 and is taken into the object side surface S1 'of the first built-in lens E1' in the photographing lens G2 through the stop STO.
The object-side surface S1 ' and the image-side surface S2 ' of the first lens element E1 ' are convex. The object-side surface S3 ' and the image-side surface S4 ' of the second built-in lens E2 ' are concave. The object-side surface S5 ' and the image-side surface S6 ' of the third built-in lens E3 ' are convex and concave. The object-side surface S7 ' and the image-side surface S8 ' of the fourth built-in lens E4 ' are convex and concave. The object-side surface S9 ' and the image-side surface S10 ' of the fifth built-in lens E5 ' are convex. The object-side surface S11 ' and the image-side surface S12 ' of the sixth built-in lens E6 ' are convex and concave. Filter E7 ' has an object side S13 ' and an image side S14 '. The light from the optical imaging lens group G1 passes through the respective surfaces S1 ' to S14 ' in order and is finally imaged on the imaging surface S15 '.
In the present example, the combined focal length f12 of the first lens E1 and the second lens E2 is 181.91mm, the combined effective focal length f of the optical imaging lens group and the image pickup lens is 22.92mm, the total length TTL of the optical imaging lens group and the image pickup lens is 179.52mm, half ImgH of the diagonal length of the effective pixel region on the imaging plane S15' of the image pickup lens G2 is 3.20mm, half Semi-FOV of the maximum angle of view of the optical imaging lens group and the image pickup lens combination is 7.7 °, and the ratio f/EPD of the combined effective focal length f of the optical imaging lens group and the image pickup lens to the entrance pupil diameter EPD of the image pickup lens is 2.09.
Table 7-1 shows a basic parameter table of the optical imaging lens group of embodiment 4, and table 7-2 shows a basic parameter table of the image pickup lens of embodiment 4, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 8 shows the high-order term coefficients of each aspherical mirror surface usable in the optical imaging lens group of example 4, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above. The high-order coefficient of each aspherical mirror surface in the imaging lens in example 4 can be seen in tables 2-2 and 2-3 in example 1.
TABLE 7-1
TABLE 7-2
| Flour mark | A4 | A6 | A8 | A10 |
| S4 | -1.8352E-06 | -4.4351E-08 | -2.0749E-10 | -6.0958E-12 |
| S5 | -5.8380E-06 | -4.0649E-09 | -2.0883E-09 | 8.5139E-12 |
| S6 | 1.3107E-06 | -1.3446E-07 | 1.5204E-09 | -3.9731E-11 |
| S7 | -2.1430E-06 | 1.0648E-07 | -2.5730E-09 | -5.6538E-12 |
| S8 | -1.3493E-05 | 1.1486E-08 | -1.7070E-09 | 2.1871E-11 |
| S9 | 7.9290E-06 | -2.5966E-07 | 2.1219E-09 | -1.0049E-11 |
| S14 | -6.7322E-05 | -8.9598E-08 | -7.4788E-09 | 6.8684E-11 |
| S15 | -2.7599E-05 | -4.6841E-07 | 3.3670E-09 | 7.2417E-12 |
| S16 | 3.8568E-05 | 1.0278E-07 | -1.7926E-09 | 7.9098E-12 |
| S17 | -2.1878E-05 | -6.1702E-08 | 1.9829E-09 | -3.9042E-12 |
| S18 | 1.7903E-05 | 4.6578E-07 | 1.5582E-10 | 9.1013E-12 |
| S19 | 4.8337E-05 | -5.7324E-07 | 1.0345E-08 | -3.7139E-13 |
| S20 | -1.0417E-04 | -5.0843E-07 | 3.7642E-09 | -2.2728E-10 |
TABLE 8
Fig. 8A shows an on-axis chromatic aberration curve of the optical imaging lens group and imaging lens combination of embodiment 4, which represents the deviation of the convergent focus of light rays of different wavelengths after passing through the lens. Fig. 8B shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the optical imaging lens group and imaging lens combination of embodiment 4. Fig. 8C shows a distortion curve of the optical imaging lens group and imaging lens combination of embodiment 4, which represents distortion magnitude values corresponding to different image heights. As can be seen from fig. 8A to 8C, the optical imaging lens group and imaging lens assembly according to embodiment 4 can achieve good imaging quality.
Example 5
An optical imaging lens group and an imaging lens according to embodiment 5 of the present application are described below with reference to fig. 9 to 10C. Fig. 9 shows a schematic configuration diagram of an optical imaging lens group and imaging lens assembly according to embodiment 5 of the present application.
As shown in fig. 9, the optical imaging lens group G1 includes, in order from an object side to an image side, a plurality of lenses, for example, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a ninth lens E9, a tenth lens E10, and an eleventh lens E11. Referring to fig. 17, the image pickup lens G2 may sequentially include along the optical axis: a stop STO, a first built-in lens E1 ', a second built-in lens E2', a third built-in lens E3 ', a fourth built-in lens E4', a fifth built-in lens E5 ', a sixth built-in lens E6', a filter E7 ', and an image plane S15'.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a convex image-side surface S2. The second lens element E2 has negative power, and has a concave object-side surface S2 and a convex image-side surface S3. The third lens element E3 has positive power, and has a convex object-side surface S4 and a convex image-side surface S5. The fourth lens element E4 has positive power, and has a convex object-side surface S6 and a concave image-side surface S7. The fifth lens element E5 has negative power, and has a convex object-side surface S8 and a concave image-side surface S9. The sixth lens element E6 has positive power, and has a convex object-side surface S10 and a concave image-side surface S11. The seventh lens element E7 has positive power, and has a convex object-side surface S12 and a concave image-side surface S13. The eighth lens element E8 has positive power, and has a concave object-side surface S14 and a convex image-side surface S15. The ninth lens element E9 has negative power, and has a concave object-side surface S16 and a convex image-side surface S17. The tenth lens element E10 has positive power, and has a convex object-side surface S18 and a convex image-side surface S19. The eleventh lens element E11 has positive power, and has a convex object-side surface S20 and a concave image-side surface S21. Illustratively, the first lens E1 and the second lens E2 may be cemented to form a cemented lens. Light from the object sequentially passes through the respective surfaces S1 to S21 and is taken into the object side surface S1 'of the first built-in lens E1' in the photographing lens G2 through the stop STO.
The object-side surface S1 ' and the image-side surface S2 ' of the first lens element E1 ' are convex. The object side surface S3 ' and the image side surface S4 ' of the second built-in lens E2 ' are concave. The object-side surface S5 ' and the image-side surface S6 ' of the third built-in lens E3 ' are convex and concave. The object-side surface S7 ' and the image-side surface S8 ' of the fourth built-in lens E4 ' are convex and concave. The object-side surface S9 ' and the image-side surface S10 ' of the fifth built-in lens E5 ' are convex. The object-side surface S11 ' and the image-side surface S12 ' of the sixth built-in lens E6 ' are convex and concave. Filter E7 ' has an object side S13 ' and an image side S14 '. The light from the optical imaging lens group G1 passes through the respective surfaces S1 ' to S14 ' in order and is finally imaged on the imaging surface S15 '.
In the present example, the combined focal length f12 of the first lens E1 and the second lens E2 is 180.82mm, the combined effective focal length f of the optical imaging lens group and the image pickup lens is 23.10mm, the total length TTL of the optical imaging lens group and the image pickup lens is 179.67mm, the half ImgH of the diagonal length of the effective pixel region on the imaging plane S15' of the image pickup lens G2 is 3.20mm, the half Semi-FOV of the maximum angle of view of the combination of the optical imaging lens group and the image pickup lens is 7.6 °, and the ratio f/EPD of the combined effective focal length f of the optical imaging lens group and the image pickup lens to the entrance pupil diameter EPD of the image pickup lens is 2.09.
Table 9-1 shows a basic parameter table of the optical imaging lens group of embodiment 5, and table 9-2 shows a basic parameter table of the image pickup lens of embodiment 5, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 10 shows the high-order term coefficients that can be used for each aspherical mirror surface in the plurality of lenses in example 5, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above. The high-order coefficient of each aspherical mirror surface in the imaging lens in example 5 can be seen in tables 2-2 and 2-3 in example 1.
TABLE 9-1
TABLE 9-2
| Flour mark | A4 | A6 | A8 | A10 |
| S4 | -2.0959E-06 | -3.3408E-08 | 1.3235E-10 | -2.5216E-11 |
| S5 | -5.7638E-06 | 1.2060E-08 | -2.3208E-09 | -1.5879E-12 |
| S6 | 1.3149E-06 | -1.3138E-07 | 1.5391E-09 | -4.2286E-11 |
| S7 | -2.0410E-06 | 1.0252E-07 | -2.5937E-09 | -3.0879E-12 |
| S8 | -1.3171E-05 | 2.5181E-08 | -1.7261E-09 | 2.2795E-11 |
| S9 | 7.9340E-06 | -2.6947E-07 | 2.1804E-09 | -1.0577E-11 |
| S14 | -6.4576E-05 | -9.2807E-08 | -7.6821E-09 | 6.8374E-11 |
| S15 | -2.9760E-05 | -4.8460E-07 | 3.2541E-09 | 7.2454E-12 |
| S16 | 3.8372E-05 | 1.0645E-07 | -1.7861E-09 | 8.0495E-12 |
| S17 | -2.1216E-05 | -6.1987E-08 | 1.9745E-09 | -3.7914E-12 |
| S18 | 1.6488E-05 | 4.4270E-07 | 1.2772E-10 | 1.1598E-11 |
| S19 | 4.9709E-05 | -5.3923E-07 | 1.0509E-08 | 1.3245E-11 |
| S20 | -1.0302E-04 | -4.0507E-07 | 8.8075E-09 | -2.1669E-10 |
Fig. 10A shows an on-axis chromatic aberration curve of the optical imaging lens group and imaging lens combination of embodiment 5, which represents the deviation of the convergent focus of light rays of different wavelengths after passing through the lens. Fig. 10B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens group and imaging lens combination of embodiment 5. Fig. 10C shows a distortion curve of the optical imaging lens group and imaging lens combination of embodiment 5, which represents distortion magnitude values corresponding to different image heights. As can be seen from fig. 10A to 10C, the optical imaging lens group and the imaging lens assembly according to embodiment 5 can achieve good imaging quality.
Example 6
An optical imaging lens group and an imaging lens according to embodiment 6 of the present application are described below with reference to fig. 11 to 12C. Fig. 11 shows a schematic configuration diagram of an optical imaging lens group and imaging lens assembly according to embodiment 6 of the present application.
As shown in fig. 11, the optical imaging lens group G1 includes, in order from an object side to an image side, a plurality of lenses, for example, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a ninth lens E9, a tenth lens E10, and an eleventh lens E11. Referring to fig. 17, the image pickup lens G2 may sequentially include along the optical axis: a stop STO, a first internal lens E1 ', a second internal lens E2', a third internal lens E3 ', a fourth internal lens E4', a fifth internal lens E5 ', a sixth internal lens E6', a filter E7 ', and an image forming surface S15'.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a convex image-side surface S2. The second lens element E2 has negative power, and has a concave object-side surface S2 and a convex image-side surface S3. The third lens element E3 has positive power, and has a convex object-side surface S4 and a convex image-side surface S5. The fourth lens element E4 has positive power, and has a convex object-side surface S6 and a concave image-side surface S7. The fifth lens element E5 has negative power, and has a convex object-side surface S8 and a concave image-side surface S9. The sixth lens element E6 has positive power, and has a concave object-side surface S10 and a convex image-side surface S11. The seventh lens element E7 has positive power, and has a convex object-side surface S12 and a concave image-side surface S13. The eighth lens element E8 has positive power, and has a concave object-side surface S14 and a convex image-side surface S15. The ninth lens element E9 has negative power, and has a concave object-side surface S16 and a convex image-side surface S17. The tenth lens element E10 has positive power, and has a convex object-side surface S18 and a convex image-side surface S19. The eleventh lens element E11 has positive power, and has a convex object-side surface S20 and a concave image-side surface S21. Illustratively, the first lens E1 and the second lens E2 may be cemented to form a cemented lens. Light from the object sequentially passes through the respective surfaces S1 to S21 and is taken into the object side surface S1 'of the first built-in lens E1' in the photographing lens G2 through the stop STO.
The object-side surface S1 ' and the image-side surface S2 ' of the first lens element E1 ' are convex. The object side surface S3 ' and the image side surface S4 ' of the second built-in lens E2 ' are concave. The object-side surface S5 ' and the image-side surface S6 ' of the third built-in lens E3 ' are convex and concave. The object-side surface S7 ' and the image-side surface S8 ' of the fourth built-in lens E4 ' are convex and concave. The object-side surface S9 ' and the image-side surface S10 ' of the fifth built-in lens E5 ' are convex. The object-side surface S11 ' and the image-side surface S12 ' of the sixth built-in lens E6 ' are convex and concave. Filter E7 ' has an object side S13 ' and an image side S14 '. The light from the optical imaging lens group G1 passes through the respective surfaces S1 ' to S14 ' in order and is finally imaged on the imaging surface S15 '.
In the present example, the combined focal length f12 of the first lens E1 and the second lens E2 is 179.74mm, the combined effective focal length f of the optical imaging lens group and the image pickup lens is 23.35mm, the total length TTL of the optical imaging lens group and the image pickup lens is 178.96mm, the half ImgH of the diagonal length of the effective pixel region on the imaging plane S15' of the image pickup lens G2 is 3.25mm, the half Semi-FOV of the maximum angle of view of the combination of the optical imaging lens group and the image pickup lens is 7.7 °, and the ratio f/EPD of the combined effective focal length f of the optical imaging lens group and the image pickup lens to the entrance pupil diameter EPD of the image pickup lens is 2.09.
Table 11-1 shows a basic parameter table of the optical imaging lens group of embodiment 6, and table 11-2 shows a basic parameter table of the image pickup lens of embodiment 6, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 12 shows the high-order term coefficients that can be used for each aspherical mirror surface in the plurality of lenses in example 6, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above. The high-order coefficient of each aspherical mirror surface in the imaging lens in example 6 can be seen in tables 2-2 and 2-3 in example 1.
TABLE 11-1
TABLE 11-2
| Flour mark | A4 | A6 | A8 | A10 |
| S4 | -2.0959E-06 | -3.3408E-08 | 1.3235E-10 | -2.5216E-11 |
| S5 | -5.7638E-06 | 1.2060E-08 | -2.3208E-09 | -1.5879E-12 |
| S6 | 1.3149E-06 | -1.3138E-07 | 1.5391E-09 | -4.2286E-11 |
| S7 | -2.0410E-06 | 1.0252E-07 | -2.5937E-09 | -3.0879E-12 |
| S8 | -1.3171E-05 | 2.5181E-08 | -1.7261E-09 | 2.2795E-11 |
| S9 | 7.9340E-06 | -2.6947E-07 | 2.1804E-09 | -1.0577E-11 |
| S14 | -6.4576E-05 | -9.2807E-08 | -7.6821E-09 | 6.8374E-11 |
| S15 | -2.9760E-05 | -4.8460E-07 | 3.2541E-09 | 7.2454E-12 |
| S16 | 3.8372E-05 | 1.0645E-07 | -1.7861E-09 | 8.0495E-12 |
| S17 | -2.1216E-05 | -6.1987E-08 | 1.9745E-09 | -3.7914E-12 |
| S18 | 1.6488E-05 | 4.4270E-07 | 1.2772E-10 | 1.1598E-11 |
| S19 | 4.9709E-05 | -5.3923E-07 | 1.0509E-08 | 1.3245E-11 |
| S20 | -1.0302E-04 | -4.0507E-07 | 8.8075E-09 | -2.1669E-10 |
TABLE 12
Fig. 12A shows an on-axis chromatic aberration curve of the optical imaging lens group and imaging lens combination of embodiment 6, which represents the deviation of the convergent focus of light rays of different wavelengths after passing through the lens. Fig. 12B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens group and imaging lens combination of embodiment 6. Fig. 12C shows a distortion curve of the optical imaging lens group and imaging lens combination of embodiment 6, which represents distortion magnitude values corresponding to different image heights. As can be seen from fig. 12A to 12C, the optical imaging lens group and imaging lens assembly according to embodiment 6 can achieve good imaging quality.
Example 7
An optical imaging lens group and an imaging lens according to embodiment 7 of the present application are described below with reference to fig. 13 to 14C. Fig. 13 shows a schematic configuration diagram of an optical imaging lens group and imaging lens combination according to embodiment 7 of the present application.
As shown in fig. 13, the optical imaging lens group G1 includes, in order from an object side to an image side, a plurality of lenses, for example, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a ninth lens E9, a tenth lens E10, and an eleventh lens E11. Referring to fig. 17, the image pickup lens G2 may sequentially include along the optical axis: a stop STO, a first internal lens E1 ', a second internal lens E2', a third internal lens E3 ', a fourth internal lens E4', a fifth internal lens E5 ', a sixth internal lens E6', a filter E7 ', and an image forming surface S15'.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a convex image-side surface S2. The second lens element E2 has negative power, and has a concave object-side surface S2 and a convex image-side surface S3. The third lens element E3 has positive power, and has a convex object-side surface S4 and a convex image-side surface S5. The fourth lens element E4 has positive power, and has a convex object-side surface S6 and a concave image-side surface S7. The fifth lens element E5 has negative power, and has a convex object-side surface S8 and a concave image-side surface S9. The sixth lens element E6 has positive power, and has a concave object-side surface S10 and a convex image-side surface S11. The seventh lens element E7 has positive power, and has a convex object-side surface S12 and a concave image-side surface S13. The eighth lens element E8 has positive power, and has a concave object-side surface S14 and a convex image-side surface S15. The ninth lens element E9 has negative power, and has a concave object-side surface S16 and a convex image-side surface S17. The tenth lens element E10 has positive power, and has a convex object-side surface S18 and a convex image-side surface S19. The eleventh lens element E11 has positive power, and has a convex object-side surface S20 and a concave image-side surface S21. Illustratively, the first lens E1 and the second lens E2 may be cemented to form a cemented lens. Light from the object sequentially passes through the respective surfaces S1 to S21 and is taken into the object side surface S1 'of the first built-in lens E1' in the photographing lens G2 through the stop STO.
The object-side surface S1 ' and the image-side surface S2 ' of the first lens element E1 ' are convex. The object side surface S3 ' and the image side surface S4 ' of the second built-in lens E2 ' are concave. The object-side surface S5 ' and the image-side surface S6 ' of the third built-in lens E3 ' are convex and concave. The object-side surface S7 ' and the image-side surface S8 ' of the fourth built-in lens E4 ' are convex and concave. The object-side surface S9 ' and the image-side surface S10 ' of the fifth built-in lens E5 ' are convex. The object-side surface S11 ' and the image-side surface S12 ' of the sixth built-in lens E6 ' are convex and concave. Filter E7 ' has an object side S13 ' and an image side S14 '. The light from the optical imaging lens group G1 passes through the respective surfaces S1 ' to S14 ' in order and is finally imaged on the imaging surface S15 '.
In the present example, the combined focal length f12 of the first lens E1 and the second lens E2 is 184.40mm, the combined effective focal length f of the optical imaging lens group and the image pickup lens is 22.38mm, the total length TTL of the optical imaging lens group and the image pickup lens is 176.20mm, the half ImgH of the diagonal length of the effective pixel region on the imaging plane S15' of the image pickup lens G2 is 3.25mm, the half Semi-FOV of the maximum angle of view of the combination of the optical imaging lens group and the image pickup lens is 8.0 °, and the ratio f/EPD of the combined effective focal length f of the optical imaging lens group and the image pickup lens to the entrance pupil diameter EPD of the image pickup lens is 2.09.
Table 13-1 shows a basic parameter table of the optical imaging lens group of embodiment 7, and table 13-2 shows a basic parameter table of the image pickup lens of embodiment 7, in which the units of the radius of curvature, thickness/distance, and focal length are millimeters (mm). Table 14 shows the high-order term coefficients that can be used for each aspherical mirror surface in the plurality of lenses in example 7, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above. The high-order coefficient of each aspherical mirror surface in the imaging lens in example 7 can be seen in tables 2-2 and 2-3 in example 1.
TABLE 13-1
TABLE 13-2
TABLE 14
Fig. 14A shows on-axis chromatic aberration curves of the optical imaging lens group and imaging lens combination of example 7, which represent deviation of convergent focuses of light rays of different wavelengths after passing through the lenses. Fig. 14B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens group and imaging lens combination of embodiment 7. Fig. 14C shows a distortion curve of the optical imaging lens group and imaging lens combination of embodiment 7, which represents distortion magnitude values corresponding to different image heights. As can be seen from fig. 14A to 14C, the optical imaging lens group and imaging lens assembly according to embodiment 7 can achieve good imaging quality.
Example 8
An optical imaging lens group and an imaging lens according to embodiment 8 of the present application are described below with reference to fig. 15 to 16C. Fig. 15 shows a schematic configuration diagram of an optical imaging lens group and imaging lens combination according to embodiment 8 of the present application.
As shown in fig. 15, the optical imaging lens group G1 includes, in order from an object side to an image side, a plurality of lenses, for example, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a ninth lens E9, a tenth lens E10, and an eleventh lens E11. Referring to fig. 17, the image pickup lens G2 may sequentially include along the optical axis: a stop STO, a first internal lens E1 ', a second internal lens E2', a third internal lens E3 ', a fourth internal lens E4', a fifth internal lens E5 ', a sixth internal lens E6', a filter E7 ', and an image forming surface S15'.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a convex image-side surface S2. The second lens element E2 has negative power, and has a concave object-side surface S2 and a convex image-side surface S3. The third lens element E3 has positive power, and has a convex object-side surface S4 and a convex image-side surface S5. The fourth lens element E4 has positive power, and has a convex object-side surface S6 and a concave image-side surface S7. The fifth lens element E5 has negative power, and has a convex object-side surface S8 and a concave image-side surface S9. The sixth lens element E6 has positive power, and has a concave object-side surface S10 and a convex image-side surface S11. The seventh lens element E7 has positive power, and has a convex object-side surface S12 and a concave image-side surface S13. The eighth lens element E8 has positive power, and has a concave object-side surface S14 and a convex image-side surface S15. The ninth lens element E9 has negative power, and has a concave object-side surface S16 and a convex image-side surface S17. The tenth lens E10 has positive power, and has a convex object-side surface S18 and a convex image-side surface S19. The eleventh lens element E11 has positive power, and has a convex object-side surface S20 and a concave image-side surface S21. Illustratively, the first lens E1 and the second lens E2 may be cemented to form a cemented lens. Light from the object sequentially passes through the surfaces S1 to S21 and is taken into the object side surface S1 'of the first built-in lens E1' in the photographing lens G2 through the stop STO.
The object-side surface S1 ' and the image-side surface S2 ' of the first lens element E1 ' are convex. The object side surface S3 ' and the image side surface S4 ' of the second built-in lens E2 ' are concave. The object-side surface S5 ' and the image-side surface S6 ' of the third lens element E3 ' are convex and concave, respectively. The object-side surface S7 ' and the image-side surface S8 ' of the fourth built-in lens E4 ' are convex and concave. The object-side surface S9 ' and the image-side surface S10 ' of the fifth built-in lens E5 ' are convex. The object-side surface S11 ' and the image-side surface S12 ' of the sixth built-in lens E6 ' are convex and concave. Filter E7 ' has an object side S13 ' and an image side S14 '. The light from the optical imaging lens group G1 passes through the respective surfaces S1 ' to S14 ' in order and is finally imaged on the imaging surface S15 '.
In the present example, the combined focal length f12 of the first lens E1 and the second lens E2 is 194.47mm, the combined effective focal length f of the optical imaging lens group and the image pickup lens is 21.70mm, the total length TTL of the optical imaging lens group and the image pickup lens is 175.32mm, half ImgH of the diagonal length of the effective pixel region on the imaging plane S15' of the image pickup lens G2 is 3.40mm, half Semi-FOV of the maximum angle of view of the optical imaging lens group and the image pickup lens combination is 8.6 °, and the ratio f/EPD of the combined effective focal length f of the optical imaging lens group and the image pickup lens to the entrance pupil diameter EPD of the image pickup lens is 2.09.
Table 15-1 shows a basic parameter table of the optical imaging lens group of embodiment 8, and table 15-2 shows a basic parameter table of the image pickup lens of embodiment 8, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 16 shows the high-order term coefficients that can be used for each aspherical mirror surface in the plurality of lenses in example 8, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above. The high-order coefficient of each aspherical mirror in the imaging lens in example 8 can be found in tables 2-2 and 2-3 in example 1.
TABLE 15-1
TABLE 15-2
| Flour mark | A4 | A6 | A8 | A10 |
| S4 | -2.0959E-06 | -3.3408E-08 | 1.3235E-10 | -2.5216E-11 |
| S5 | -5.7638E-06 | 1.2060E-08 | -2.3208E-09 | -1.5879E-12 |
| S6 | 1.3149E-06 | -1.3138E-07 | 1.5391E-09 | -4.2286E-11 |
| S7 | -2.0410E-06 | 1.0252E-07 | -2.5937E-09 | -3.0879E-12 |
| S8 | -1.3171E-05 | 2.5181E-08 | -1.7261E-09 | 2.2795E-11 |
| S9 | 7.9340E-06 | -2.6947E-07 | 2.1804E-09 | -1.0577E-11 |
| S14 | -6.4576E-05 | -9.2807E-08 | -7.6821E-09 | 6.8374E-11 |
| S15 | -2.9760E-05 | -4.8460E-07 | 3.2541E-09 | 7.2454E-12 |
| S16 | 3.8372E-05 | 1.0645E-07 | -1.7861E-09 | 8.0495E-12 |
| S17 | -2.1216E-05 | -6.1987E-08 | 1.9745E-09 | -3.7914E-12 |
| S18 | 1.6488E-05 | 4.4270E-07 | 1.2772E-10 | 1.1598E-11 |
| S19 | 4.9709E-05 | -5.3923E-07 | 1.0509E-08 | 1.3245E-11 |
| S20 | -1.0302E-04 | -4.0507E-07 | 8.8075E-09 | -2.1669E-10 |
TABLE 16
Fig. 16A shows an on-axis chromatic aberration curve of the optical imaging lens group and imaging lens combination of embodiment 8, which represents the deviation of the convergent focus of light rays of different wavelengths after passing through the lens. Fig. 16B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens group and imaging lens combination of embodiment 8. Fig. 16C shows a distortion curve of the optical imaging lens group and imaging lens combination of embodiment 8, which represents distortion magnitude values corresponding to different image heights. As can be seen from fig. 16A to 16C, the optical imaging lens group and imaging lens combination according to embodiment 8 can achieve good imaging quality.
In summary, examples 1 to 8 each satisfy the relationship shown in table 17.
TABLE 17
The present application also provides an imaging device whose electron photosensitive element may be a photo-coupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The imaging apparatus may include a separate imaging device such as a digital camera and the optical imaging lens group described above, which may be attached to an object side of the separate imaging device of the digital camera. The imaging apparatus may also include an imaging module integrated on a mobile electronic device such as a cell phone, and the optical imaging lens group described above, which may be attached to the object side of a separate imaging device of the digital camera.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the invention herein disclosed is not limited to the particular combination of features described above, but also encompasses other arrangements formed by any combination of the above features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (10)
1. An optical imaging lens assembly having a plurality of lenses, in order from an object side to an image side along an optical axis, comprising: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens having optical power,
at least four lenses in the plurality of lenses are meniscus lenses with different surface types of an object side and an image side;
at least one of the plurality of lenses has an optical power different from the optical power of its neighboring lens in positive and negative properties;
the optical imaging lens group is suitable for being attached to the object side of the camera lens, and satisfies the following conditions: TD1/f > 6.0, wherein TD1 is a distance on the optical axis from an object side surface of the first lens to an image side surface of a lens closest to an image side among the plurality of lenses, and f is a combined effective focal length of the optical imaging lens group and the image pickup lens.
2. The optical imaging lens group according to claim 1, wherein the image pickup lens includes a first built-in lens, a second built-in lens, a third built-in lens, a fourth built-in lens, a fifth built-in lens, and a sixth built-in lens having power along the optical axis,
wherein TTL/f + f/EPD >9.0, where TTL is a distance on the optical axis from an object-side surface of the first lens element to an imaging surface of the image capturing lens, f is a combined effective focal length of the optical imaging lens group and the image capturing lens, and EPD is an entrance pupil diameter of the image capturing lens.
3. The optical imaging lens group of claim 2, wherein TD2/f < 1.0, wherein TD2 is the distance on the optical axis from the object side surface of the first lens component to the image side surface of the sixth lens component.
4. The optical imaging lens group of claim 1, wherein the optical imaging lens group satisfies: 0.5 < f12/f3 < 2.0, wherein f12 is the combined focal length of the first and second lenses, and f3 is the effective focal length of the third lens.
5. The optical imaging lens group of claim 1, wherein the optical imaging lens group satisfies: -1.5 < (f5+ f6)/(f5-f6) < 1.5, wherein f5 is the effective focal length of the fifth lens and f6 is the effective focal length of the sixth lens.
6. The optical imaging lens group of claim 1 wherein the plurality of lenses further comprises a ninth lens and a tenth lens disposed along an optical axis,
the optical imaging lens group satisfies: 0 < f7/f10 < 1.5, wherein f7 is an effective focal length of the seventh lens and f10 is an effective focal length of the tenth lens.
7. The optical imaging lens group of claim 1, wherein the optical imaging lens group satisfies: -1.0 < R2/R1-R3/R4 < 0, wherein R1 is the radius of curvature of the object-side surface of the first lens, R2 is the radius of curvature of the image-side surface of the first lens, R3 is the radius of curvature of the object-side surface of the second lens, and R4 is the radius of curvature of the image-side surface of the second lens.
8. The optical imaging lens group of claim 1, wherein the optical imaging lens group satisfies: -2.0 < R2/R1+ (R3-R4)/(R3+ R4) < 0, wherein R1 is a radius of curvature of an object-side surface of the first lens, R2 is a radius of curvature of an image-side surface of the first lens, R3 is a radius of curvature of an object-side surface of the second lens, and R4 is a radius of curvature of an image-side surface of the second lens.
9. The optical imaging lens group of claim 1, wherein the optical imaging lens group satisfies: 0 < (R7+ R8)/(R9+ R10) < 1.0, wherein R7 is a radius of curvature of an object-side surface of the fourth lens, R8 is a radius of curvature of an image-side surface of the fourth lens, R9 is a radius of curvature of an object-side surface of the fifth lens, and R10 is a radius of curvature of an image-side surface of the fifth lens.
10. The optical imaging lens group of claim 1, wherein the optical imaging lens group satisfies: 0 < R14/R13+ R16/R15 < 5.0, wherein R13 is a radius of curvature of an object-side surface of the seventh lens, R14 is a radius of curvature of an image-side surface of the seventh lens, R15 is a radius of curvature of an object-side surface of the eighth lens, and R16 is a radius of curvature of an image-side surface of the eighth lens.
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