CN112346218A - Optical imaging lens - Google Patents
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- CN112346218A CN112346218A CN202011389733.0A CN202011389733A CN112346218A CN 112346218 A CN112346218 A CN 112346218A CN 202011389733 A CN202011389733 A CN 202011389733A CN 112346218 A CN112346218 A CN 112346218A
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- 238000012634 optical imaging Methods 0.000 title claims abstract description 192
- 230000003287 optical effect Effects 0.000 claims abstract description 121
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- 238000004519 manufacturing process Methods 0.000 description 2
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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
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
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Abstract
The present application relates to an optical imaging lens, sequentially from an object side to an image side along an optical axis, comprising: a first lens having an optical power; a second lens having a negative optical power; a third lens having optical power; a fourth lens having a negative optical power; a fifth lens having optical power; and a sixth lens element with negative refractive power, wherein the object-side surface is convex and the image-side surface is concave. The optical imaging lens can satisfy f/EPD < 1.9; TTL/ImgH < 1.3; and 2.0< | R7/f | <5.0, where f is a total effective focal length of the optical imaging lens, EPD is an entrance pupil diameter of the optical imaging lens, TTL is a distance along an optical axis from an object-side surface of the first lens to an imaging surface of the optical imaging lens, ImgH is a half of a diagonal length of an effective pixel region on the imaging surface, and R7 is a radius of curvature of an object-side surface of the fourth lens.
Description
Technical Field
The application relates to the field of optical elements, in particular to an optical imaging lens comprising six lenses.
Background
In recent years, with the rapid development of electronic products, cameras mounted on the electronic products are becoming more and more widely used. Meanwhile, with the trend of electronic products towards being light and thin, the optical camera lens mounted thereon needs to ensure good imaging quality and have a light and thin size. The photosensitive Device of the optical lens is generally a Charge Coupled Device (CCD) or a Complementary Metal-Oxide Semiconductor (CMOS) Device. Due to the continuous refinement of semiconductor manufacturing process technology, the pixel size of the photosensitive device is continuously reduced. In addition, the current electronic products are developed with better functions and thinner sizes. Therefore, a miniaturized optical lens having a good image quality is more and more favored by manufacturers and consumers.
In order to meet the requirements of high pixel and large field angle, the conventional optical lens adopts a large-caliber and multi-lens arrangement. However, such an arrangement directly affects the size of the lens, making it difficult to meet the demand for miniaturization. In addition, in order to increase the angle of view of the lens, problems such as increased distortion of the lens and an excessively large outgoing angle of the principal ray may occur, which may result in insufficient resolution of the lens.
Disclosure of Invention
In one aspect, the present application provides an optical imaging lens, which may include, in order from an object side to an image side along an optical axis: a first lens having an optical power; a second lens having a negative optical power; a third lens having optical power; a fourth lens having a negative optical power; a fifth lens having optical power; and a sixth lens element with negative refractive power, wherein the object-side surface is convex and the image-side surface is concave. The optical imaging lens can satisfy f/EPD < 1.9; TTL/ImgH < 1.3; and 2.0< | R7/f | <5.0, where f is a total effective focal length of the optical imaging lens, EPD is an entrance pupil diameter of the optical imaging lens, TTL is a distance along an optical axis from an object-side surface of the first lens to an imaging surface of the optical imaging lens, ImgH is a half of a diagonal length of an effective pixel region on the imaging surface, and R7 is a radius of curvature of an object-side surface of the fourth lens.
In some embodiments, the optical imaging lens may satisfy 1.8< (R11+ R12)/(R11-R12) <2.5, where R11 is a radius of curvature of an object-side surface of the sixth lens, and R12 is a radius of curvature of an image-side surface of the sixth lens.
In some embodiments, the optical imaging lens may satisfy 2.8< (CT1+ CT2+ CT3)/(T12+ T23) <3.8, where CT1 is a central thickness of the first lens along the optical axis, CT2 is a central thickness of the second lens along the optical axis, CT3 is a central thickness of the third lens along the optical axis, T12 is a separation distance of the first lens and the second lens along the optical axis, and T23 is a separation distance of the second lens and the third lens along the optical axis.
In some embodiments, a maximum value ETmax among edge thicknesses of the first to sixth lenses may satisfy: ETmax <0.5 mm.
In some embodiments, the optical imaging lens may satisfy 1.1< SAG52/SAG51<1.9, where SAG51 is a distance in a direction of an optical axis from an intersection of an object-side surface of the fifth lens and the optical axis to an effective radius vertex of the object-side surface of the fifth lens, and SAG52 is a distance in a direction of the optical axis from an intersection of an image-side surface of the fifth lens and the optical axis to an effective radius vertex of the image-side surface of the fifth lens.
In some embodiments, the optical imaging lens may satisfy 2.0< | CT3/SAG32| <3.0, where CT3 is a center thickness of the third lens along the optical axis, and SAG32 is a distance in a direction of the optical axis from an intersection point of an image-side surface of the third lens and the optical axis to an effective radius vertex of the image-side surface of the third lens.
In some embodiments, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens may satisfy: -2.7< f2/f1< -2.2.
In some embodiments, the combined focal length f123 of the first lens, the second lens, and the third lens and the total effective focal length f of the optical imaging lens may satisfy: 1.30< f123/f < 1.55.
In some embodiments, the optical imaging lens may satisfy 3.5< | R2/f1| + | R3/f2| <5.7, where f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, R2 is the radius of curvature of the image-side surface of the first lens, and R3 is the radius of curvature of the object-side surface of the second lens.
In some embodiments, the optical imaging lens may satisfy 2.2< (CT1+ CT3)/(T12+ T23) <3.0, where CT1 is a central thickness of the first lens along the optical axis, CT3 is a central thickness of the third lens along the optical axis, T12 is a separation distance of the first lens and the second lens along the optical axis, and T23 is a separation distance of the second lens and the third lens along the optical axis.
In some embodiments, the optical imaging lens may satisfy 1.3< f5 × tan (Semi-FOV)/R9<1.7, where f5 is an effective focal length of the fifth lens, R9 is a radius of curvature of an object-side surface of the fifth lens, and the Semi-FOV is a maximum half field angle of the optical imaging lens.
In some embodiments, the total effective focal length f of the optical imaging lens and the combined focal length f12 of the first and second lenses may satisfy: 1.0< f12/f < 1.3.
In another aspect, the present application provides an optical imaging lens, which may include, in order from an object side to an image side along an optical axis: a first lens having an optical power; a second lens having a negative optical power; a third lens having optical power; a fourth lens having a negative optical power; a fifth lens having optical power; and a sixth lens element with a refractive power, wherein the object-side surface is convex and the image-side surface is concave. The optical imaging lens can satisfy the following conditions: f/EPD < 1.9; TTL/ImgH < 1.3; and 1.0< T56/CT5<2.0, wherein f is a total effective focal length of the optical imaging lens, EPD is an entrance pupil diameter of the optical imaging lens, TTL is a distance along the optical axis from an object side surface of the first lens to an imaging surface of the optical imaging lens, ImgH is a half of a diagonal length of an effective pixel region on the imaging surface, T56 is a separation distance along the optical axis of the fifth lens and the sixth lens, and CT5 is a center thickness of the fifth lens along the optical axis.
In some embodiments, the optical imaging lens may satisfy 1.8< (R11+ R12)/(R11-R12) <2.5, where R11 is a radius of curvature of an object-side surface of the sixth lens, and R12 is a radius of curvature of an image-side surface of the sixth lens.
In some embodiments, the optical imaging lens may satisfy 2.8< (CT1+ CT2+ CT3)/(T12+ T23) <3.8, where CT1 is a central thickness of the first lens along the optical axis, CT2 is a central thickness of the second lens along the optical axis, CT3 is a central thickness of the third lens along the optical axis, T12 is a separation distance of the first lens and the second lens along the optical axis, and T23 is a separation distance of the second lens and the third lens along the optical axis.
In some embodiments, a maximum value ETmax among edge thicknesses of the first to sixth lenses may satisfy: ETmax <0.5 mm.
In some embodiments, the optical imaging lens may satisfy 1.1< SAG52/SAG51<1.9, where SAG51 is a distance in a direction of an optical axis from an intersection of an object-side surface of the fifth lens and the optical axis to an effective radius vertex of the object-side surface of the fifth lens, and SAG52 is a distance in a direction of the optical axis from an intersection of an image-side surface of the fifth lens and the optical axis to an effective radius vertex of the image-side surface of the fifth lens.
In some embodiments, the optical imaging lens may satisfy 2.0< | CT3/SAG32| <3.0, where CT3 is a center thickness of the third lens along the optical axis, and SAG32 is a distance in a direction of the optical axis from an intersection point of an image-side surface of the third lens and the optical axis to an effective radius vertex of the image-side surface of the third lens.
In some embodiments, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens may satisfy: -2.7< f2/f1< -2.2.
In some embodiments, the combined focal length f123 of the first lens, the second lens, and the third lens and the total effective focal length f of the optical imaging lens may satisfy: 1.30< f123/f < 1.55.
In some embodiments, the optical imaging lens may satisfy 3.5< | R2/f1| + | R3/f2| <5.7, where f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, R2 is the radius of curvature of the image-side surface of the first lens, and R3 is the radius of curvature of the object-side surface of the second lens.
In some embodiments, the optical imaging lens may satisfy 2.2< (CT1+ CT3)/(T12+ T23) <3.0, where CT1 is a central thickness of the first lens along the optical axis, CT3 is a central thickness of the third lens along the optical axis, T12 is a separation distance of the first lens and the second lens along the optical axis, and T23 is a separation distance of the second lens and the third lens along the optical axis.
In some embodiments, the optical imaging lens may satisfy 1.3< f5 × tan (Semi-FOV)/R9<1.7, where f5 is an effective focal length of the fifth lens, R9 is a radius of curvature of an object-side surface of the fifth lens, and the Semi-FOV is a maximum half field angle of the optical imaging lens.
In some embodiments, the total effective focal length f of the optical imaging lens and the combined focal length f12 of the first and second lenses may satisfy: 1.0< f12/f < 1.3.
According to the optical imaging lens described in the above embodiments and the embodiments, for example, at least one of ultra-thin, large aperture, high resolution, and the like can be realized.
Drawings
Other features, objects, and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments when taken in conjunction with the accompanying drawings. In the drawings:
fig. 1 shows a schematic structural view of an optical imaging lens according to embodiment 1 of the present application;
fig. 2A to 2D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 1;
fig. 3 is a schematic structural view showing an optical imaging lens according to embodiment 2 of the present application;
fig. 4A to 4D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 2;
fig. 5 is a schematic structural view showing an optical imaging lens according to embodiment 3 of the present application;
fig. 6A to 6D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 3;
fig. 7 is a schematic structural view showing an optical imaging lens according to embodiment 4 of the present application;
fig. 8A to 8D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 4;
fig. 9 is a schematic structural view showing an optical imaging lens according to embodiment 5 of the present application;
fig. 10A to 10D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 5;
fig. 11 is a schematic structural view showing an optical imaging lens according to embodiment 6 of the present application;
fig. 12A to 12D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 6.
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 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 image side 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 according to an exemplary embodiment of the present application may include six lenses having optical powers, which are a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, respectively. The first lens element to the sixth lens element are arranged along an optical axis of the optical imaging lens in order from an object side to an image side, and any two adjacent lens elements may have a distance therebetween.
In an exemplary embodiment, the first lens may have an optical power; the second lens may have a negative optical power; the third lens may have optical power; the fourth lens may have a negative optical power; the fifth lens may have optical power; and the sixth lens element can have a focal power, and the object-side surface of the sixth lens element is convex and the image-side surface of the sixth lens element is concave.
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 concave.
In an exemplary embodiment, at least one of the object-side surface and the image-side surface of the third lens may be convex.
In an exemplary embodiment, at least one of the object-side surface and the image-side surface of the fourth lens may be a concave surface.
In an exemplary embodiment, the sixth lens may have a negative power.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: f/EPD <1.9, where f is the total effective focal length of the optical imaging lens and EPD is the entrance pupil diameter of the optical imaging lens. More specifically, f and EPD may further satisfy: 1.7< f/EPD < 1.9. Satisfy f/EPD <1.9, can effectively increase the light flux of camera lens unit interval, make it possess higher illuminance to promote the camera lens imaging quality under darker environment, reach the purpose that improves its practicality.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: TTL/ImgH <1.3, wherein, TTL is the distance along the optical axis from the object side surface of the first lens to the imaging surface of the optical imaging lens, and ImgH is half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens. More specifically, TTL and ImgH may further satisfy: 1.0< TTL/ImgH < 1.3. The TTL/ImgH is less than 1.3, and the large image height and the short optical total length can be realized at the same time, thereby being beneficial to realizing the miniaturization of a lens and improving the imaging quality.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 2.0< | R7/f | <5.0, where R7 is the radius of curvature of the object-side surface of the fourth lens, and f is the total effective focal length of the optical imaging lens. The requirement of 2.0< | R7/f | <5.0 is met, the focal power of the lens can be reasonably distributed, the fourth lens has good processability, and the aberration of the lens can be corrected and the size of the lens can be reduced.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy 1.0< T56/CT5<2.0, where T56 is a separation distance of the fifth lens and the sixth lens along the optical axis, and CT5 is a center thickness of the fifth lens along the optical axis. More specifically, T56 and CT5 further satisfy: 1.2< T56/CT5< 1.8. Satisfying 1.0< T56/CT5<2.0 is advantageous for achieving miniaturization of the lens and reducing the risk of generating ghost images.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 1.8< (R11+ R12)/(R11-R12) <2.5, wherein R11 is a radius of curvature of an object-side surface of the sixth lens, and R12 is a radius of curvature of an image-side surface of the sixth lens. Satisfy 1.8< (R11+ R12)/(R11-R12) <2.5, be favorable to through the focal power of increase sixth lens, make its light of converging that can be better, so not only be favorable to promoting the imaging quality of system, still be favorable to improving the relative illuminance of system.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 2.8< (CT1+ CT2+ CT3)/(T12+ T23) <3.8, wherein CT1 is a central thickness of the first lens along the optical axis, CT2 is a central thickness of the second lens along the optical axis, CT3 is a central thickness of the third lens along the optical axis, T12 is a separation distance of the first lens and the second lens along the optical axis, and T23 is a separation distance T23 of the second lens and the third lens along the optical axis. The requirements of 2.8< (CT1+ CT2+ CT3)/(T12+ T23) <3.8 are met, and the convenience of processing and assembling the lens is improved.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: ETmax <0.5mm, where ETmax is the maximum value among the edge thicknesses of the first to sixth lenses. More specifically, ETmax may further satisfy: 0.3mm < ETmax <0.5 mm. The ETmax is less than 0.5mm, so that the processing and forming of the lens are facilitated, and the assembling stability of the lens is improved.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 1.1< SAG52/SAG51<1.9, wherein SAG51 is a distance in a direction of an optical axis from an intersection point of an object-side surface of the fifth lens and the optical axis to an effective radius vertex of the object-side surface of the fifth lens, and SAG52 is a distance in a direction of the optical axis from an intersection point of an image-side surface of the fifth lens and the optical axis to an effective radius vertex of the image-side surface of the fifth lens. The requirement that 1.1< SAG52/SAG51<1.9 is met is favorable for processing and forming the fifth lens and simultaneously is favorable for improving the assembling stability of the lens.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 2.0< | CT3/SAG32| <3.0, wherein CT3 is the central thickness of the third lens along the optical axis, and SAG32 is the distance from the intersection point of the image-side surface of the third lens and the optical axis to the effective radius vertex of the image-side surface of the third lens in the direction of the optical axis. The requirement of 2.0< | CT3/SAG32| <3.0 is met, and the lens processing method is favorable for avoiding the process problems of difficult lens processing and the like caused by overlarge SAG 32.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: -2.7< f2/f1< -2.2, wherein f1 is the effective focal length of the first lens and f2 is the effective focal length of the second lens. The optical lens meets the requirements of-2.7 < f2/f1< -2.2, and is favorable for compensating the aberration of the lens, so that the integral resolving power of the system is improved.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 1.30< f123/f <1.55, where f123 is the combined focal length of the first lens, the second lens, and the third lens, and f is the total effective focal length of the optical imaging lens. Satisfying 1.30< f123/f <1.55, can avoid the focal power to concentrate excessively, is favorable to correcting the aberration of the system. Meanwhile, the combined focal power of the first three lenses is reasonably controlled, and the size of the lens can be effectively reduced.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 3.5< | R2/f1| + | R3/f2| <5.7, wherein 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, f1 is the effective focal length of the first lens, and f2 is the effective focal length of the second lens. The optical lens meets the requirement of 3.5< | R2/f1| + | R3/f2| <5.7, and is beneficial to improving the field curvature and distortion of the lens, thereby achieving the purposes of compensating the aberration of the lens and improving the resolution of the system. Meanwhile, the reasonable control of the range of the | R2/f1| + | R3/f2| is also beneficial to reducing the processing difficulty of the first lens and the second lens. In some embodiments, the image side surface of the first lens can be concave and the object side surface of the second lens can be convex.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 2.2< (CT1+ CT3)/(T12+ T23) <3.0, wherein CT1 is the central thickness of the first lens along the optical axis, CT3 is the central thickness of the third lens along the optical axis, T12 is the separation distance of the first lens and the second lens along the optical axis, and T23 is the separation distance of the second lens and the third lens along the optical axis. Satisfy 2.2< (CT1+ CT3)/(T12+ T23) <3.0, be favorable to improving the convenience of the processing equipment of lens.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 1.3< f5 × tan (Semi-FOV)/R9<1.7, where f5 is the effective focal length of the fifth lens, Semi-FOV is the maximum half field angle of the optical imaging lens, and R9 is the radius of curvature of the object-side surface of the fifth lens. Satisfying 1.3< f5 xtan (Semi-FOV)/R9<1.7 facilitates the process molding of the fifth lens and compensates for the aberration of the lens. In some embodiments, the object side surface of the fifth lens may be convex.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 1.0< f12/f <1.3, where f12 is the combined focal length of the first and second lenses and f is the total effective focal length of the optical imaging lens. Satisfying 1.0< f12/f <1.3 is beneficial to balancing the aberration of the lens, thereby improving the system resolving power.
In an exemplary embodiment, the optical imaging lens according to the present application may further include a stop disposed before the first lens. Optionally, the optical imaging lens further includes a filter for correcting color deviation and/or a protective glass for protecting the photosensitive element on the imaging surface.
The optical imaging lens according to the above-described embodiment of the present application may employ a plurality of lenses, for example, six lenses as described above. By reasonably distributing the focal power, the surface type, the central thickness of each lens, the on-axis distance between each lens and the like, the volume of the optical imaging lens can be effectively reduced, the processability of the optical imaging lens can be improved, and the optical imaging lens is more favorable for production and processing and can be suitable for portable electronic products. The optical imaging lens configured as described above can have characteristics such as ultra-thin, large aperture, and good imaging quality.
In the embodiment of the present application, at least one of the mirror surfaces of each lens is an aspherical mirror, that is, at least one of the object-side surface of the first lens to the image-side surface of the sixth lens is an aspherical mirror. 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 lens center to the lens periphery, an aspherical lens has a better curvature radius characteristic, and has an advantage of improving distortion aberration, that is, astigmatic aberration. After the aspheric lens is adopted, the aberration generated in imaging can be eliminated as much as possible, and the imaging quality is further improved. 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, and the sixth lens is an aspheric mirror surface. Optionally, each of the first, second, third, fourth, fifth, and sixth lenses has an object-side surface and an image-side surface that are aspheric mirror surfaces.
However, it will be appreciated by those skilled in the art that the number of lenses constituting an optical imaging lens may be varied to achieve the various results and advantages described in the present specification without departing from the claimed subject matter. For example, although six lenses are exemplified in the embodiment, the optical imaging lens is not limited to including six lenses. The optical imaging lens may also include other numbers of lenses, if desired.
Specific examples of an optical imaging lens applicable to the above-described embodiments are further described below with reference to the drawings.
Example 1
An optical imaging lens according to embodiment 1 of the present application is described below with reference to fig. 1 to 2D. Fig. 1 shows a schematic structural diagram of an optical imaging lens according to embodiment 1 of the present application.
As shown in fig. 1, the optical imaging lens includes, in order from an object side to an image side: a stop STO, 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 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 concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has negative power, and has a concave object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has positive power, and has a convex object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. Filter E7 has an object side S13 and an image side S14. The light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
Basic parameters of the optical imaging lens of embodiment 1 are shown in table 1, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm).
TABLE 1
In this example, the total effective focal length f of the optical imaging lens is 5.22mm, the total length TTL of the optical imaging lens (i.e., the distance along the optical axis from the object-side surface S1 of the first lens E1 to the imaging surface S15 of the optical imaging lens) is 5.95mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S15 of the optical imaging lens is 4.76mm, the aperture value Fno of the optical imaging lens is 1.88, and the maximum half field angle Semi-FOV of the optical imaging lens is 41.50 °.
In embodiment 1, the object-side surface and the image-side surface of any one of the first lens E1 through the sixth lens E6 are aspheric surfaces, and the surface shape x of the aspheric lens can be defined by, but is not limited to, the following aspheric surface formula:
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. Tables 2 and 3 show the high-order coefficient coefficients a4, A6, A8, a10, a12, a14, a16, a18, a20, a22, a24, a26, a28, and a30, which can be used for each of the aspherical mirrors S1 through S12 in example 1.
TABLE 2
| Flour mark | A18 | A20 | A22 | A24 | A26 | A28 | A30 |
| S1 | 3.4048E+01 | -2.5462E+01 | 1.3613E+01 | -5.0721E+00 | 1.2506E+00 | -1.8333E-01 | 1.2096E-02 |
| S2 | -3.6845E+01 | 2.7072E+01 | -1.4322E+01 | 5.3084E+00 | -1.3068E+00 | 1.9179E-01 | -1.2691E-02 |
| S3 | 7.7747E+01 | -7.4712E+01 | 5.1355E+01 | -2.4579E+01 | 7.7689E+00 | -1.4557E+00 | 1.2229E-01 |
| S4 | 1.5076E+03 | -1.7470E+03 | 1.4524E+03 | -8.4438E+02 | 3.2594E+02 | -7.5060E+01 | 7.8073E+00 |
| S5 | 1.8292E+02 | -1.8435E+02 | 1.2406E+02 | -5.2270E+01 | 1.1621E+01 | -5.4439E-01 | -1.7722E-01 |
| S6 | 2.0145E+01 | -1.9023E+01 | 1.2734E+01 | -5.9044E+00 | 1.8063E+00 | -3.2868E-01 | 2.7023E-02 |
| S7 | -5.9890E+01 | 4.4025E+01 | -2.3293E+01 | 8.6344E+00 | -2.1271E+00 | 3.1259E-01 | -2.0722E-02 |
| S8 | -1.2292E+00 | 6.4636E-01 | -2.4412E-01 | 6.4380E-02 | -1.1232E-02 | 1.1631E-03 | -5.4058E-05 |
| S9 | -1.6827E-04 | 1.3452E-04 | -3.8412E-05 | 6.0781E-06 | -5.6211E-07 | 2.8519E-08 | -6.1476E-10 |
| S10 | 1.0929E-03 | -2.2610E-04 | 3.2987E-05 | -3.3329E-06 | 2.2247E-07 | -8.8398E-09 | 1.5854E-10 |
| S11 | -7.3860E-08 | 4.8205E-07 | -6.1039E-08 | 4.1499E-09 | -1.6960E-10 | 3.9365E-12 | -4.0113E-14 |
| S12 | 1.4100E-04 | -1.4556E-05 | 1.0854E-06 | -5.6773E-08 | 1.9735E-09 | -4.0903E-11 | 3.8221E-13 |
TABLE 3
Fig. 2A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 1, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 2B shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the optical imaging lens of embodiment 1. Fig. 2C shows a distortion curve of the optical imaging lens of embodiment 1, which represents distortion magnitude values corresponding to different image heights. Fig. 2D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 1, which represents a deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 2A to 2D, the optical imaging lens according to embodiment 1 can achieve good imaging quality.
Example 2
An optical imaging lens according to embodiment 2 of the present application is described below with reference to fig. 3 to 4D. 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 structural diagram of an optical imaging lens according to embodiment 2 of the present application.
As shown in fig. 3, the optical imaging lens includes, in order from an object side to an image side: a stop STO, 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 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 concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has negative power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has positive power, and has a convex object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. Filter E7 has an object side S13 and an image side S14. The light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
In this example, the total effective focal length f of the optical imaging lens is 5.01mm, the total length TTL of the optical imaging lens is 5.76mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S15 of the optical imaging lens is 4.76mm, the aperture value Fno of the optical imaging lens is 1.88, and the maximum half field angle Semi-FOV of the optical imaging lens is 42.65 °.
Basic parameters of the optical imaging lens of embodiment 2 are shown in table 4, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm). Tables 5 and 6 show the high-order term coefficients a4, A6, A8, a10, a12, a14, a16, a18, a20, a22, a24, a26, a28, and a30 that can be used for each of the aspherical mirror surfaces S1 through S12 in example 2, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
TABLE 4
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | -1.5689E-02 | 1.7075E-01 | -1.0780E+00 | 4.6667E+00 | -1.4426E+01 | 3.2537E+01 | -5.3949E+01 |
| S2 | -3.0431E-02 | 1.2119E-01 | -6.8206E-01 | 2.5269E+00 | -5.8097E+00 | 8.0981E+00 | -5.6663E+00 |
| S3 | -2.2965E-02 | 8.3784E-02 | -8.5302E-01 | 6.4721E+00 | -2.9623E+01 | 8.9641E+01 | -1.8863E+02 |
| S4 | 2.2988E-02 | -5.1980E-01 | 7.0133E+00 | -5.4823E+01 | 2.8244E+02 | -1.0046E+03 | 2.5348E+03 |
| S5 | 2.4540E-02 | -1.2802E+00 | 1.2131E+01 | -7.3684E+01 | 3.0488E+02 | -8.9292E+02 | 1.8915E+03 |
| S6 | -3.8148E-02 | -4.7713E-01 | 4.7849E+00 | -2.7844E+01 | 1.0605E+02 | -2.7856E+02 | 5.1863E+02 |
| S7 | -1.2028E-01 | -1.6280E-01 | 1.5142E+00 | -6.0218E+00 | 1.5543E+01 | -2.8112E+01 | 3.6844E+01 |
| S8 | -1.4318E-01 | -6.9027E-03 | 3.7386E-01 | -1.1521E+00 | 2.1559E+00 | -2.7548E+00 | 2.5076E+00 |
| S9 | -4.2911E-02 | 1.3842E-02 | 4.6154E-03 | -4.8138E-02 | 7.5593E-02 | -6.5050E-02 | 3.5979E-02 |
| S10 | 8.7680E-03 | 9.7557E-04 | 2.3493E-02 | -5.6995E-02 | 6.1310E-02 | -4.0107E-02 | 1.7534E-02 |
| S11 | -2.6440E-01 | 1.7110E-01 | -8.9547E-02 | 3.9440E-02 | -1.3561E-02 | 3.5130E-03 | -6.7905E-04 |
| S12 | -3.0114E-01 | 2.2159E-01 | -1.3637E-01 | 6.3781E-02 | -2.2033E-02 | 5.5997E-03 | -1.0499E-03 |
TABLE 5
| Flour mark | A18 | A20 | A22 | A24 | A26 | A28 | A30 |
| S1 | 6.5733E+01 | -5.8426E+01 | 3.7286E+01 | -1.6590E+01 | 4.8753E+00 | -8.4924E-01 | 6.6329E-02 |
| S2 | -1.0717E+00 | 6.4665E+00 | -6.6254E+00 | 3.6220E+00 | -1.1391E+00 | 1.9039E-01 | -1.2592E-02 |
| S3 | 2.8282E+02 | -3.0434E+02 | 2.3331E+02 | -1.2433E+02 | 4.3742E+01 | -9.1313E+00 | 8.5615E-01 |
| S4 | -4.6012E+03 | 6.0246E+03 | -5.6362E+03 | 3.6726E+03 | -1.5827E+03 | 4.0534E+02 | -4.6702E+01 |
| S5 | -2.9268E+03 | 3.3066E+03 | -2.6953E+03 | 1.5424E+03 | -5.8747E+02 | 1.3368E+02 | -1.3744E+01 |
| S6 | -6.9407E+02 | 6.6939E+02 | -4.6087E+02 | 2.2082E+02 | -6.9913E+01 | 1.3143E+01 | -1.1103E+00 |
| S7 | -3.5589E+01 | 2.5438E+01 | -1.3328E+01 | 4.9836E+00 | -1.2597E+00 | 1.9275E-01 | -1.3462E-02 |
| S8 | -1.6566E+00 | 7.9742E-01 | -2.7685E-01 | 6.7427E-02 | -1.0906E-02 | 1.0495E-03 | -4.5363E-05 |
| S9 | -1.3538E-02 | 3.5412E-03 | -6.4424E-04 | 7.9957E-05 | -6.4571E-06 | 3.0592E-07 | -6.4537E-09 |
| S10 | -5.3304E-03 | 1.1439E-03 | -1.7283E-04 | 1.7999E-05 | -1.2304E-06 | 4.9691E-08 | -8.9866E-10 |
| S11 | 9.7426E-05 | -1.0282E-05 | 7.8471E-07 | -4.2018E-08 | 1.4945E-09 | -3.1672E-11 | 3.0241E-13 |
| S12 | 1.4527E-04 | -1.4748E-05 | 1.0820E-06 | -5.5717E-08 | 1.9066E-09 | -3.8880E-11 | 3.5714E-13 |
TABLE 6
Fig. 4A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 2, which represents the deviation of the convergent focal points 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 of embodiment 2. Fig. 4C shows a distortion curve of the optical imaging lens of embodiment 2, which represents distortion magnitude values corresponding to different image heights. Fig. 4D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 2, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 4A to 4D, the optical imaging lens according to embodiment 2 can achieve good imaging quality.
Example 3
An optical imaging lens according to embodiment 3 of the present application is described below with reference to fig. 5 to 6D. Fig. 5 shows a schematic structural diagram of an optical imaging lens according to embodiment 3 of the present application.
As shown in fig. 5, the optical imaging lens includes, in order from an object side to an image side: a stop STO, 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 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 concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has negative power, and has a concave object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has positive power, and has a convex object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. Filter E7 has an object side S13 and an image side S14. The light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
In this example, the total effective focal length f of the optical imaging lens is 5.14mm, the total length TTL of the optical imaging lens is 5.95mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S15 of the optical imaging lens is 4.76mm, the aperture value Fno of the optical imaging lens is 1.88, and the maximum half field angle Semi-FOV of the optical imaging lens is 41.98 °.
Basic parameters of the optical imaging lens of embodiment 3 are shown in table 7, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm). Table 8 and table 9 show the high-order term coefficients a4, A6, A8, a10, a12, a14, a16, a18, a20, a22, a24, a26, a28, and a30 that can be used for each of the aspherical mirror surfaces S1 through S12 in example 3, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
TABLE 7
TABLE 8
| Flour mark | A18 | A20 | A22 | A24 | A26 | A28 | A30 |
| S1 | 3.5314E+01 | -2.5308E+01 | 1.3036E+01 | -4.7043E+00 | 1.1293E+00 | -1.6209E-01 | 1.0531E-02 |
| S2 | -1.1914E+01 | 1.3405E+01 | -9.5361E+00 | 4.3689E+00 | -1.2430E+00 | 1.9749E-01 | -1.3096E-02 |
| S3 | 2.2201E+02 | -2.3977E+02 | 1.8264E+02 | -9.5945E+01 | 3.3079E+01 | -6.7361E+00 | 6.1406E-01 |
| S4 | 7.0955E+02 | -9.3278E+02 | 8.9250E+02 | -6.0222E+02 | 2.7082E+02 | -7.2677E+01 | 8.7891E+00 |
| S5 | 3.0671E+01 | -4.4155E+01 | 4.5129E+01 | -3.1840E+01 | 1.4676E+01 | -3.9623E+00 | 4.7415E-01 |
| S6 | 2.4113E+01 | -2.2727E+01 | 1.5301E+01 | -7.1634E+00 | 2.2134E+00 | -4.0573E-01 | 3.3436E-02 |
| S7 | -2.9907E+01 | 2.2426E+01 | -1.2069E+01 | 4.5391E+00 | -1.1315E+00 | 1.6780E-01 | -1.1189E-02 |
| S8 | -1.8474E-01 | 1.0720E-01 | -4.4300E-02 | 1.2677E-02 | -2.3775E-03 | 2.6203E-04 | -1.2838E-05 |
| S9 | -1.7348E-02 | 4.4105E-03 | -7.8758E-04 | 9.6534E-05 | -7.7310E-06 | 3.6436E-07 | -7.6664E-09 |
| S10 | -3.7737E-03 | 7.9235E-04 | -1.1731E-04 | 1.1978E-05 | -8.0282E-07 | 3.1790E-08 | -5.6359E-10 |
| S11 | 6.3926E-05 | -6.9337E-06 | 5.4778E-07 | -3.0453E-08 | 1.1253E-09 | -2.4763E-11 | 2.4527E-13 |
| S12 | 1.1225E-04 | -1.1235E-05 | 8.1333E-07 | -4.1351E-08 | 1.3982E-09 | -2.8197E-11 | 2.5636E-13 |
TABLE 9
Fig. 6A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 3, which represents the deviation of the convergent focal points 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 of embodiment 3. Fig. 6C shows a distortion curve of the optical imaging lens of embodiment 3, which represents distortion magnitude values corresponding to different image heights. Fig. 6D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 3, which represents a deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 6A to 6D, the optical imaging lens according to embodiment 3 can achieve good imaging quality.
Example 4
An optical imaging lens according to embodiment 4 of the present application is described below with reference to fig. 7 to 8D. Fig. 7 shows a schematic structural diagram of an optical imaging lens according to embodiment 4 of the present application.
As shown in fig. 7, the optical imaging lens includes, in order from an object side to an image side: a stop STO, 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 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 concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has negative power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has positive power, and has a convex object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. Filter E7 has an object side S13 and an image side S14. The light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
In this example, the total effective focal length f of the optical imaging lens is 5.18mm, the total length TTL of the optical imaging lens is 6.01mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S15 of the optical imaging lens is 4.76mm, the aperture value Fno of the optical imaging lens is 1.88, and the maximum half field angle Semi-FOV of the optical imaging lens is 41.54 °.
Basic parameters of the optical imaging lens of embodiment 4 are shown in table 10, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm). Tables 11 and 12 show the high-order term coefficients a4, A6, A8, a10, a12, a14, a16, a18, a20, a22, a24, a26, a28, and a30 that can be used for each of the aspherical mirror surfaces S1 through S12 in example 4, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | -3.4876E-03 | 4.7911E-02 | -3.0783E-01 | 1.2917E+00 | -3.6753E+00 | 7.3278E+00 | -1.0463E+01 |
| S2 | -1.7478E-02 | 1.2927E-03 | 6.4969E-02 | -2.8171E-01 | 7.7783E-01 | -1.3403E+00 | 1.1254E+00 |
| S3 | -2.5955E-02 | 1.0762E-01 | -9.1489E-01 | 6.3352E+00 | -2.8065E+01 | 8.3670E+01 | -1.7418E+02 |
| S4 | -5.0166E-03 | 1.5174E-02 | 2.7408E-01 | -2.4061E+00 | 1.1808E+01 | -3.5935E+01 | 6.8875E+01 |
| S5 | -6.8994E-02 | 2.3489E-01 | -1.9330E+00 | 1.0359E+01 | -3.7751E+01 | 9.5262E+01 | -1.6860E+02 |
| S6 | -1.0119E-01 | 4.4202E-01 | -2.9193E+00 | 1.3171E+01 | -4.1552E+01 | 9.3530E+01 | -1.5274E+02 |
| S7 | -1.4683E-01 | 2.7687E-01 | -1.2384E+00 | 4.6094E+00 | -1.2342E+01 | 2.3690E+01 | -3.3006E+01 |
| S8 | -1.4246E-01 | 9.8012E-02 | -1.1998E-01 | 1.8972E-01 | -2.6325E-01 | 2.7891E-01 | -2.0953E-01 |
| S9 | -3.6902E-02 | 3.7878E-04 | 2.4091E-02 | -5.8344E-02 | 7.1696E-02 | -5.5103E-02 | 2.8318E-02 |
| S10 | 1.1897E-02 | 8.6382E-05 | 7.8640E-03 | -2.2649E-02 | 2.4738E-02 | -1.5953E-02 | 6.7794E-03 |
| S11 | -2.6120E-01 | 1.5792E-01 | -7.5067E-02 | 2.9900E-02 | -9.5873E-03 | 2.4008E-03 | -4.6117E-04 |
| S12 | -2.9270E-01 | 2.0662E-01 | -1.2172E-01 | 5.5016E-02 | -1.8497E-02 | 4.5898E-03 | -8.4098E-04 |
TABLE 11
| Flour mark | A18 | A20 | A22 | A24 | A26 | A28 | A30 |
| S1 | 1.0825E+01 | -8.1287E+00 | 4.3862E+00 | -1.6574E+00 | 4.1642E-01 | -6.2493E-02 | 4.2402E-03 |
| S2 | 4.3621E-01 | -2.3603E+00 | 2.9736E+00 | -2.0641E+00 | 8.5086E-01 | -1.9575E-01 | 1.9438E-02 |
| S3 | 2.5815E+02 | -2.7399E+02 | 2.0668E+02 | -1.0815E+02 | 3.7307E+01 | -7.6282E+00 | 7.0008E-01 |
| S4 | -7.8346E+01 | 3.6479E+01 | 2.9639E+01 | -6.0928E+01 | 4.3885E+01 | -1.5621E+01 | 2.2858E+00 |
| S5 | 2.0913E+02 | -1.7837E+02 | 9.9311E+01 | -3.1347E+01 | 2.6268E+00 | 1.4274E+00 | -3.4526E-01 |
| S6 | 1.8242E+02 | -1.5913E+02 | 1.0013E+02 | -4.4208E+01 | 1.2984E+01 | -2.2765E+00 | 1.8021E-01 |
| S7 | 3.3617E+01 | -2.5000E+01 | 1.3415E+01 | -5.0561E+00 | 1.2695E+00 | -1.9068E-01 | 1.2964E-02 |
| S8 | 1.0483E-01 | -3.0263E-02 | 1.9125E-03 | 1.9746E-03 | -7.5861E-04 | 1.1852E-04 | -7.2052E-06 |
| S9 | -1.0040E-02 | 2.4854E-03 | -4.2806E-04 | 5.0216E-05 | -3.8240E-06 | 1.7038E-07 | -3.3715E-09 |
| S10 | -1.9840E-03 | 4.0686E-04 | -5.8434E-05 | 5.7631E-06 | -3.7213E-07 | 1.4176E-08 | -2.4161E-10 |
| S11 | 6.6904E-05 | -7.2039E-06 | 5.6300E-07 | -3.0891E-08 | 1.1250E-09 | -2.4379E-11 | 2.3766E-13 |
| S12 | 1.1373E-04 | -1.1284E-05 | 8.0923E-07 | -4.0738E-08 | 1.3634E-09 | -2.7204E-11 | 2.4463E-13 |
TABLE 12
Fig. 8A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 4, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 8B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 4. Fig. 8C shows a distortion curve of the optical imaging lens of embodiment 4, which represents distortion magnitude values corresponding to different image heights. Fig. 8D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 4, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 8A to 8D, the optical imaging lens according to embodiment 4 can achieve good imaging quality.
Example 5
An optical imaging lens according to embodiment 5 of the present application is described below with reference to fig. 9 to 10D. Fig. 9 shows a schematic structural diagram of an optical imaging lens according to embodiment 5 of the present application.
As shown in fig. 9, the optical imaging lens includes, in order from an object side to an image side: a stop STO, 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 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 concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has negative power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has positive power, and has a convex object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. Filter E7 has an object side S13 and an image side S14. The light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
In this example, the total effective focal length f of the optical imaging lens is 5.22mm, the total length TTL of the optical imaging lens is 6.07mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S15 of the optical imaging lens is 4.76mm, the aperture value Fno of the optical imaging lens is 1.88, and the maximum half field angle Semi-FOV of the optical imaging lens is 41.71 °.
Basic parameters of the optical imaging lens of example 5 are shown in table 13, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm). Tables 14 and 15 show the high-order term coefficients a4, A6, A8, a10, a12, a14, a16, a18, a20, a22, a24, a26, a28, and a30 that can be used for each of the aspherical mirror surfaces S1 through S12 in example 5, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
Watch 13
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | -2.4890E-03 | 3.1064E-02 | -1.2238E-01 | 2.1987E-01 | 1.7707E-01 | -1.8914E+00 | 4.8084E+00 |
| S2 | -1.9676E-02 | 2.9994E-02 | -5.5561E-02 | -2.1364E-01 | 1.9938E+00 | -6.8805E+00 | 1.3997E+01 |
| S3 | -2.1479E-02 | 5.2812E-02 | -3.5540E-01 | 2.7785E+00 | -1.3345E+01 | 4.1708E+01 | -8.8995E+01 |
| S4 | -6.9440E-03 | 1.2278E-01 | -9.1537E-01 | 5.6908E+00 | -2.5360E+01 | 8.4471E+01 | -2.1316E+02 |
| S5 | -4.7571E-02 | 4.8386E-02 | -7.3117E-01 | 5.5232E+00 | -2.6528E+01 | 8.6759E+01 | -2.0146E+02 |
| S6 | -6.1036E-02 | 1.9146E-03 | 2.7142E-01 | -1.8220E+00 | 6.6171E+00 | -1.6075E+01 | 2.7732E+01 |
| S7 | -1.2747E-01 | 6.0866E-02 | 7.6068E-02 | -7.2285E-01 | 2.6562E+00 | -6.3122E+00 | 1.0353E+01 |
| S8 | -1.4259E-01 | 1.3547E-01 | -2.6498E-01 | 5.2089E-01 | -7.5416E-01 | 7.6271E-01 | -5.2638E-01 |
| S9 | -3.4591E-02 | -2.3548E-02 | 7.5151E-02 | -1.2335E-01 | 1.2672E-01 | -8.7686E-02 | 4.2248E-02 |
| S10 | 1.0187E-02 | -5.3892E-03 | 1.6781E-02 | -3.0157E-02 | 2.8509E-02 | -1.6950E-02 | 6.8122E-03 |
| S11 | -2.3219E-01 | 1.3629E-01 | -6.0771E-02 | 2.1643E-02 | -5.9109E-03 | 1.2305E-03 | -1.9737E-04 |
| S12 | -2.6471E-01 | 1.7578E-01 | -9.7890E-02 | 4.1878E-02 | -1.3351E-02 | 3.1452E-03 | -5.4717E-04 |
TABLE 14
| Flour mark | A18 | A20 | A22 | A24 | A26 | A28 | A30 |
| S1 | -7.0607E+00 | 6.7915E+00 | -4.4229E+00 | 1.9388E+00 | -5.4900E-01 | 9.0813E-02 | -6.6696E-03 |
| S2 | -1.8660E+01 | 1.6916E+01 | -1.0491E+01 | 4.3712E+00 | -1.1642E+00 | 1.7778E-01 | -1.1700E-02 |
| S3 | 1.3307E+02 | -1.4082E+02 | 1.0498E+02 | -5.3923E+01 | 1.8166E+01 | -3.6128E+00 | 3.2155E-01 |
| S4 | 4.0435E+02 | -5.6643E+02 | 5.7204E+02 | -4.0240E+02 | 1.8634E+02 | -5.0923E+01 | 6.2126E+00 |
| S5 | 3.3859E+02 | -4.1323E+02 | 3.6224E+02 | -2.2192E+02 | 9.0051E+01 | -2.1715E+01 | 2.3531E+00 |
| S6 | -3.4807E+01 | 3.1949E+01 | -2.1227E+01 | 9.9293E+00 | -3.0969E+00 | 5.7722E-01 | -4.8548E-02 |
| S7 | -1.1982E+01 | 9.8482E+00 | -5.7062E+00 | 2.2755E+00 | -5.9359E-01 | 9.1049E-02 | -6.2136E-03 |
| S8 | 2.3644E-01 | -5.8694E-02 | 7.7854E-04 | 4.6272E-03 | -1.5254E-03 | 2.2117E-04 | -1.2782E-05 |
| S9 | -1.4409E-02 | 3.4919E-03 | -5.9607E-04 | 6.9937E-05 | -5.3633E-06 | 2.4196E-07 | -4.8696E-09 |
| S10 | -1.9138E-03 | 3.8066E-04 | -5.3417E-05 | 5.1760E-06 | -3.2979E-07 | 1.2439E-08 | -2.1050E-10 |
| S11 | 2.4490E-05 | -2.3252E-06 | 1.6466E-07 | -8.3556E-09 | 2.8531E-10 | -5.8469E-12 | 5.4183E-14 |
| S12 | 7.0201E-05 | -6.5989E-06 | 4.4757E-07 | -2.1270E-08 | 6.7080E-10 | -1.2592E-11 | 1.0638E-13 |
Fig. 10A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 5, which represents the deviation of the convergent focal points 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 of embodiment 5. Fig. 10C shows a distortion curve of the optical imaging lens of embodiment 5, which represents distortion magnitude values corresponding to different image heights. Fig. 10D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 5, which represents a deviation of different image heights on the imaging surface after light passes through the lens. As can be seen from fig. 10A to 10D, the optical imaging lens according to embodiment 5 can achieve good imaging quality.
Example 6
An optical imaging lens according to embodiment 6 of the present application is described below with reference to fig. 11 to 12D. Fig. 11 shows a schematic structural view of an optical imaging lens according to embodiment 6 of the present application.
As shown in fig. 11, the optical imaging lens includes, in order from an object side to an image side: a stop STO, 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 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 concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has negative power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has positive power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. Filter E7 has an object side S13 and an image side S14. The light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
In this example, the total effective focal length f of the optical imaging lens is 5.26mm, the total length TTL of the optical imaging lens is 6.07mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S15 of the optical imaging lens is 4.76mm, the aperture value Fno of the optical imaging lens is 1.88, and the maximum half field angle Semi-FOV of the optical imaging lens is 41.25 °.
Basic parameters of the optical imaging lens of example 6 are shown in table 16, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm). Tables 17 and 18 show the high-order term coefficients a4, A6, A8, a10, a12, a14, a16, a18, a20, a22, a24, a26, a28, and a30 that can be used for each of the aspherical mirror surfaces S1 through S12 in example 6, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
TABLE 16
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | -6.6007E-03 | 8.8317E-02 | -6.0613E-01 | 2.6720E+00 | -7.9337E+00 | 1.6458E+01 | -2.4401E+01 |
| S2 | -1.7069E-02 | -2.6093E-02 | 3.2549E-01 | -1.7551E+00 | 6.1004E+00 | -1.4429E+01 | 2.3872E+01 |
| S3 | -2.4334E-02 | 8.7966E-02 | -6.7896E-01 | 4.5459E+00 | -1.9515E+01 | 5.6321E+01 | -1.1336E+02 |
| S4 | 5.1080E-03 | -1.5998E-01 | 2.8633E+00 | -2.5070E+01 | 1.3949E+02 | -5.2390E+02 | 1.3751E+03 |
| S5 | -3.5838E-02 | -2.0490E-01 | 2.0155E+00 | -1.2791E+01 | 5.4972E+01 | -1.6705E+02 | 3.6688E+02 |
| S6 | -5.8721E-02 | 3.1451E-02 | -6.9453E-02 | -1.1142E-01 | 1.3289E+00 | -4.8995E+00 | 1.0749E+01 |
| S7 | -1.4058E-01 | 2.4231E-01 | -1.0435E+00 | 3.5983E+00 | -8.8109E+00 | 1.5397E+01 | -1.9469E+01 |
| S8 | -1.4913E-01 | 1.9214E-01 | -5.4709E-01 | 1.3351E+00 | -2.3116E+00 | 2.8473E+00 | -2.5254E+00 |
| S9 | -3.5498E-02 | -1.5144E-02 | 6.0296E-02 | -1.1339E-01 | 1.2654E-01 | -9.2388E-02 | 4.6216E-02 |
| S10 | 5.3554E-03 | 1.0065E-02 | -3.6338E-03 | -1.4195E-02 | 2.0104E-02 | -1.3813E-02 | 5.9643E-03 |
| S11 | -2.2165E-01 | 1.2140E-01 | -5.3675E-02 | 1.9533E-02 | -5.4805E-03 | 1.1654E-03 | -1.8966E-04 |
| S12 | -2.5048E-01 | 1.6020E-01 | -8.7953E-02 | 3.7606E-02 | -1.2095E-02 | 2.8936E-03 | -5.1356E-04 |
TABLE 17
| Flour mark | A18 | A20 | A22 | A24 | A26 | A28 | A30 |
| S1 | 2.6150E+01 | -2.0272E+01 | 1.1246E+01 | -4.3485E+00 | 1.1121E+00 | -1.6894E-01 | 1.1538E-02 |
| S2 | -2.8059E+01 | 2.3519E+01 | -1.3934E+01 | 5.6877E+00 | -1.5180E+00 | 2.3767E-01 | -1.6484E-02 |
| S3 | 1.6227E+02 | -1.6618E+02 | 1.2086E+02 | -6.0931E+01 | 2.0239E+01 | -3.9828E+00 | 3.5164E-01 |
| S4 | -2.5699E+03 | 3.4390E+03 | -3.2706E+03 | 2.1576E+03 | -9.3842E+02 | 2.4193E+02 | -2.7998E+01 |
| S5 | -5.8837E+02 | 6.8876E+02 | -5.8160E+02 | 3.4468E+02 | -1.3591E+02 | 3.1994E+01 | -3.3996E+00 |
| S6 | -1.5735E+01 | 1.5967E+01 | -1.1310E+01 | 5.4996E+00 | -1.7525E+00 | 3.2984E-01 | -2.7802E-02 |
| S7 | 1.7937E+01 | -1.2016E+01 | 5.7791E+00 | -1.9401E+00 | 4.3068E-01 | -5.6687E-02 | 3.3432E-03 |
| S8 | 1.6237E+00 | -7.5530E-01 | 2.5103E-01 | -5.7996E-02 | 8.8332E-03 | -7.9604E-04 | 3.2093E-05 |
| S9 | -1.6215E-02 | 4.0205E-03 | -6.9988E-04 | 8.3563E-05 | -6.5110E-06 | 2.9807E-07 | -6.0801E-09 |
| S10 | -1.7474E-03 | 3.5721E-04 | -5.1108E-05 | 5.0242E-06 | -3.2361E-07 | 1.2303E-08 | -2.0933E-10 |
| S11 | 2.3781E-05 | -2.2793E-06 | 1.6304E-07 | -8.3646E-09 | 2.8892E-10 | -5.9881E-12 | 5.6075E-14 |
| S12 | 6.7425E-05 | -6.4993E-06 | 4.5272E-07 | -2.2122E-08 | 7.1800E-10 | -1.3881E-11 | 1.2082E-13 |
Watch 18
Fig. 12A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 6, which represents the deviation of the convergent focal points 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 of embodiment 6. Fig. 12C shows a distortion curve of the optical imaging lens of embodiment 6, which represents distortion magnitude values corresponding to different image heights. Fig. 12D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 6, which represents a deviation of different image heights on the imaging surface after light passes through the lens. As can be seen from fig. 12A to 12D, the optical imaging lens according to embodiment 6 can achieve good imaging quality.
In summary, examples 1 to 6 each satisfy the relationship shown in table 19.
| Conditions/examples | 1 | 2 | 3 | 4 | 5 | 6 |
| f/EPD | 1.88 | 1.88 | 1.88 | 1.88 | 1.88 | 1.88 |
| TTL/ImgH | 1.25 | 1.21 | 1.25 | 1.26 | 1.27 | 1.28 |
| |R7/f| | 3.59 | 4.87 | 3.00 | 3.14 | 2.05 | 2.79 |
| T56/CT5 | 1.55 | 1.78 | 1.46 | 1.39 | 1.29 | 1.55 |
| (R11+R12)/(R11-R12) | 2.02 | 1.93 | 1.99 | 2.00 | 2.00 | 2.44 |
| (CT1+CT2+CT3)/(T12+T23) | 3.56 | 2.84 | 3.10 | 3.17 | 2.96 | 3.49 |
| Etmax(mm) | 0.41 | 0.38 | 0.39 | 0.41 | 0.43 | 0.46 |
| SAG52/SAG51 | 1.61 | 1.72 | 1.56 | 1.46 | 1.59 | 1.27 |
| |CT3/SAG32| | 2.53 | 2.83 | 2.12 | 2.43 | 2.25 | 2.50 |
| f2/f1 | -2.42 | -2.56 | -2.59 | -2.31 | -2.40 | -2.36 |
| f123/f1 | 1.37 | 1.52 | 1.34 | 1.40 | 1.36 | 1.37 |
| |R2/f1|+|R3/f2| | 5.09 | 3.70 | 4.69 | 5.69 | 5.11 | 4.81 |
| (CT1+CT3)/(T12+T23) | 2.86 | 2.26 | 2.49 | 2.54 | 2.37 | 2.79 |
| f5×tan(Semi-FOV)/R9 | 1.35 | 1.34 | 1.33 | 1.33 | 1.36 | 1.68 |
| f12/f | 1.19 | 1.21 | 1.18 | 1.23 | 1.21 | 1.20 |
Watch 19
The present application also provides an image pickup apparatus, the electronic photosensitive element of which may be a photosensitive coupled element (CCD) or a complementary metal oxide semiconductor element (CMOS). The imaging device may be a stand-alone camera device such as a digital camera, or may be a camera module integrated on a mobile electronic device such as a mobile phone. The image pickup apparatus is equipped with the optical imaging lens described above.
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. The optical imaging lens assembly, in order from an object side to an image side along an optical axis, comprises:
a first lens having an optical power;
a second lens having a negative optical power;
a third lens having optical power;
a fourth lens having a negative optical power;
a fifth lens having optical power; and
a sixth lens element with negative refractive power having a convex object-side surface and a concave image-side surface;
the optical imaging lens satisfies:
f/EPD<1.9；
TTL/ImgH < 1.3; and
2.0<|R7/f|<5.0，
wherein f is a total effective focal length of the optical imaging lens, EPD is an entrance pupil diameter of the optical imaging lens, TTL is a distance along the optical axis from an object-side surface of the first lens element to an imaging surface of the optical imaging lens, ImgH is a half of a diagonal length of an effective pixel area on the imaging surface, and R7 is a radius of curvature of an object-side surface of the fourth lens element.
2. The optical imaging lens according to claim 1, characterized in that 1.8< (R11+ R12)/(R11-R12) <2.5,
wherein R11 is a radius of curvature of an object-side surface of the sixth lens, and R12 is a radius of curvature of an image-side surface of the sixth lens.
3. The optical imaging lens according to claim 1, characterized in that 2.8< (CT1+ CT2+ CT3)/(T12+ T23) <3.8,
wherein CT1 is a center thickness of the first lens along the optical axis, CT2 is a center thickness of the second lens along the optical axis, CT3 is a center thickness of the third lens along the optical axis, T12 is a separation distance of the first and second lenses along the optical axis, and T23 is a separation distance of the second and third lenses along the optical axis.
4. The optical imaging lens according to claim 1, characterized in that a maximum value ETmax among edge thicknesses of the first to sixth lenses satisfies: ETmax <0.5 mm.
5. The optical imaging lens according to claim 1, characterized in that 1.1< SAG52/SAG51<1.9,
wherein SAG51 is a distance in the direction of the optical axis from an intersection point of an object-side surface of the fifth lens and the optical axis to an effective radius vertex of the object-side surface of the fifth lens, and SAG52 is a distance in the direction of the optical axis from an intersection point of an image-side surface of the fifth lens and the optical axis to an effective radius vertex of the image-side surface of the fifth lens.
6. The optical imaging lens according to claim 1, characterized in that 2.0< | CT3/SAG32| <3.0,
wherein CT3 is a center thickness of the third lens along the optical axis, and SAG32 is a distance in a direction of the optical axis from an intersection of an image-side surface of the third lens and the optical axis to an effective radius vertex of the image-side surface of the third lens.
7. The optical imaging lens of claim 1, wherein the effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy: -2.7< f2/f1< -2.2.
8. The optical imaging lens of claim 1, wherein a combined focal length f123 of the first lens, the second lens, and the third lens and the total effective focal length f satisfy: 1.30< f123/f < 1.55.
9. The optical imaging lens according to any one of claims 1 to 8,
1.3<f5×tan(Semi-FOV)/R9<1.7，
where f5 is an effective focal length of the fifth lens, R9 is a radius of curvature of an object-side surface of the fifth lens, and Semi-FOV is a maximum half field angle of the optical imaging lens.
10. The optical imaging lens assembly, in order from an object side to an image side along an optical axis, comprises:
a first lens having an optical power;
a second lens having a negative optical power;
a third lens having optical power;
a fourth lens having a negative optical power;
a fifth lens having optical power; and
a sixth lens element with a focal power, the object-side surface of the sixth lens element being convex and the image-side surface of the sixth lens element being concave,
the optical imaging lens satisfies:
f/EPD<1.9；
TTL/ImgH < 1.3; and
1.0<T56/CT5<2.0，
wherein f is a total effective focal length of the optical imaging lens, EPD is an entrance pupil diameter of the optical imaging lens, TTL is a distance along the optical axis from an object side surface of the first lens to an imaging surface of the optical imaging lens, ImgH is a half of a diagonal length of an effective pixel region on the imaging surface, T56 is a separation distance along the optical axis of the fifth lens and the sixth lens, and CT5 is a center thickness of the fifth lens along the optical axis.
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| CN113484994A (en) * | 2021-08-02 | 2021-10-08 | 浙江舜宇光学有限公司 | Optical imaging lens |
| CN113484994B (en) * | 2021-08-02 | 2023-08-11 | 浙江舜宇光学有限公司 | Optical imaging lens |
| CN114675396A (en) * | 2021-12-07 | 2022-06-28 | 浙江舜宇光学有限公司 | Imaging system |
| CN114675396B (en) * | 2021-12-07 | 2024-06-14 | 浙江舜宇光学有限公司 | Imaging system |
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