CN109116520B - Optical imaging lens - Google Patents

Abstract

The application discloses optical imaging lens, this camera lens includes in order from the object side to the image side along the 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. The first lens has positive focal power, the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface; the third lens has negative focal power, and the image side surface of the third lens is a concave surface; and the sixth lens has negative optical power. The distance TTL between the object side surface of the first lens and the imaging surface of the optical imaging lens on the optical axis and the total effective focal length f of the optical imaging lens meet the condition that TTL/f is less than 1.0.

Description

Optical imaging lens

Technical Field

The present application relates to an optical imaging lens, and in particular, to an optical imaging lens comprising eight lenses.

Background technique

In recent years, with the rapid upgrading of portable electronic devices such as smartphones and tablets, higher and higher requirements have been placed on the imaging lenses used in conjunction with them. In addition to requiring imaging lenses to have high resolution, large image surface, large aperture and other characteristics, they are also required to have excellent imaging quality for distant scenes. However, how to achieve long focal length, high resolution, and high imaging quality while taking into account miniaturization so that imaging lenses can be suitable for increasingly thin and light portable electronic devices is an urgent problem to be solved in the current lens design field.

Summary of the invention

The present application provides an optical imaging lens, such as a telephoto lens, which can be applicable to portable electronic products and can at least solve or partially solve at least one of the above-mentioned shortcomings in the prior art.

On the one hand, the present application provides such an optical imaging lens, which includes, in order from the object side to the image side along the 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 with optical power. The first lens may have positive optical power, and its object side surface may be convex, and its image side surface may be concave; the third lens may have negative optical power, and its image side surface may be concave; and the sixth lens may have negative optical power. The distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis and the total effective focal length f of the optical imaging lens may satisfy TTL/f＜1.0.

In one embodiment, the total effective focal length f of the optical imaging lens and the combined focal length f12 of the first lens and the second lens may satisfy 2＜f/f12＜2.5.

In one embodiment, the effective focal length f3 of the third lens and the effective focal length f6 of the sixth lens may satisfy 0.7＜f3/f6＜1.2.

In one embodiment, the total effective focal length f of the optical imaging lens, the curvature radius R1 of the object side surface of the first lens, the curvature radius R2 of the image side surface of the first lens, the curvature radius R3 of the object side surface of the second lens, and the curvature radius R4 of the image side surface of the second lens may satisfy 1.5＜f/(R1+R2+R3+R4)＜2.0.

In one embodiment, a curvature radius R5 of the object-side surface of the third lens, a curvature radius R6 of the image-side surface of the third lens, and a total effective focal length f of the optical imaging lens may satisfy 0.9＜|R5+R6|/f＜1.4.

In one embodiment, a curvature radius R12 of the image-side surface of the sixth lens and a curvature radius R13 of the object-side surface of the seventh lens may satisfy 0＜R12/R13＜0.5.

In one embodiment, the center thickness CT1 of the first lens on the optical axis, the center thickness CT4 of the fourth lens on the optical axis, the center thickness CT5 of the fifth lens on the optical axis, and the distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis may satisfy 1.8＜(CT1+CT4+CT5)×10/TTL＜2.3.

In one embodiment, half of the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens ImgH, the spacing distance T34 between the third lens and the fourth lens on the optical axis, and the spacing distance T56 between the fifth lens and the sixth lens on the optical axis may satisfy 1.6＜ImgH/(T34+T56)＜2.1.

In one embodiment, a center thickness CT7 of the seventh lens on the optical axis, a spacing T78 between the seventh lens and the eighth lens on the optical axis, and a center thickness CT8 of the eighth lens on the optical axis satisfy 0.6＜CT7/(T78+CT8)＜1.6.

In one embodiment, the maximum effective half-aperture DT11 of the object-side surface of the first lens and the maximum effective half-aperture DT31 of the object-side surface of the third lens may satisfy 1.2＜DT11/DT31＜1.7.

In one embodiment, the maximum effective half-aperture DT82 of the image-side surface of the eighth lens and the maximum effective half-aperture DT32 of the image-side surface of the third lens may satisfy 2.3＜DT82/DT32＜3.3.

In one embodiment, half of the maximum field of view (semi-FOV) of the optical imaging lens may satisfy 20°＜semi-FOV＜25°.

On the other hand, the present application provides such an optical imaging lens, which includes, in order from the object side to the image side along the 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 with optical power. Among them, the first lens may have positive optical power, its object side surface may be convex, and its image side surface may be concave; the third lens may have negative optical power, its image side surface may be concave; and the sixth lens may have negative optical power. Among them, half of the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens ImgH, the spacing distance T34 between the third lens and the fourth lens on the optical axis, and the spacing distance T56 between the fifth lens and the sixth lens on the optical axis may satisfy 1.6＜ImgH/(T34+T56)＜2.1.

On the other hand, the present application provides such an optical imaging lens, which includes, in order from the object side to the image side along the 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 with optical power. The first lens may have positive optical power, and its object side surface may be convex and its image side surface may be concave; the third lens may have negative optical power, and its image side surface may be concave; and the sixth lens may have negative optical power. Half of the maximum field of view angle semi-FOV of the optical imaging lens may satisfy 20°＜semi-FOV＜25°.

On the other hand, the present application provides such an optical imaging lens, which includes, in order from the object side to the image side along the 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 with optical power. The first lens may have positive optical power, and its object side surface may be convex, and its image side surface may be concave; the third lens may have negative optical power, and its image side surface may be concave; and the sixth lens may have negative optical power. The total effective focal length f of the optical imaging lens, the curvature radius R1 of the object side surface of the first lens, the curvature radius R2 of the image side surface of the first lens, the curvature radius R3 of the object side surface of the second lens, and the curvature radius R4 of the image side surface of the second lens may satisfy 1.5＜f/(R1+R2+R3+R4)＜2.0.

On the other hand, the present application provides such an optical imaging lens, which includes, in order from the object side to the image side along the 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 with optical power. The first lens may have positive optical power, and its object side surface may be convex and its image side surface may be concave; the third lens may have negative optical power, and its image side surface may be concave; and the sixth lens may have negative optical power. The total effective focal length f of the optical imaging lens and the combined focal length f12 of the first lens and the second lens may satisfy 2＜f/f12＜2.5.

On the other hand, the present application provides such an optical imaging lens, which includes, in order from the object side to the image side along the 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 with optical power. The first lens may have positive optical power, and its object side surface may be convex and its image side surface may be concave; the third lens may have negative optical power, and its image side surface may be concave; and the sixth lens may have negative optical power. The curvature radius R12 of the image side surface of the sixth lens and the curvature radius R13 of the object side surface of the seventh lens may satisfy 0＜R12/R13＜0.5.

On the other hand, the present application provides such an optical imaging lens, which includes, in order from the object side to the image side along the 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 with optical power. The first lens may have positive optical power, and its object side surface may be convex and its image side surface may be concave; the third lens may have negative optical power, and its image side surface may be concave; and the sixth lens may have negative optical power. The maximum effective semi-aperture DT11 of the object side surface of the first lens and the maximum effective semi-aperture DT31 of the object side surface of the third lens may satisfy 1.2＜DT11/DT31＜1.7.

The present application adopts eight lenses, and by reasonably allocating the optical focal length, surface shape, center thickness of each lens, and axial spacing between each lens, the above-mentioned optical imaging lens has at least one beneficial effect of long focal length, miniaturization, high imaging quality, etc.

BRIEF DESCRIPTION OF THE DRAWINGS

Other features, purposes and advantages of the present application will become more apparent through the following detailed description of non-limiting embodiments in conjunction with the accompanying drawings. In the accompanying drawings:

FIG1 is a schematic structural diagram of an optical imaging lens according to Embodiment 1 of the present application;

2A to 2D respectively show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the optical imaging lens of Example 1;

FIG3 is a schematic structural diagram of an optical imaging lens according to Embodiment 2 of the present application;

4A to 4D respectively show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the optical imaging lens of Example 2;

FIG5 is a schematic structural diagram of an optical imaging lens according to Embodiment 3 of the present application;

6A to 6D respectively show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the optical imaging lens of Example 3;

FIG. 7 is a schematic structural diagram of an optical imaging lens according to Embodiment 4 of the present application;

8A to 8D respectively show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the optical imaging lens of Example 4;

FIG9 is a schematic structural diagram of an optical imaging lens according to Embodiment 5 of the present application;

10A to 10D respectively show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the optical imaging lens of Example 5;

FIG11 is a schematic structural diagram of an optical imaging lens according to Embodiment 6 of the present application;

12A to 12D respectively show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the optical imaging lens of Example 6;

FIG13 is a schematic structural diagram of an optical imaging lens according to Embodiment 7 of the present application;

14A to 14D respectively show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the optical imaging lens of Example 7;

FIG15 is a schematic structural diagram of an optical imaging lens according to Example 8 of the present application;

16A to 16D respectively show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the optical imaging lens of Example 8;

FIG17 is a schematic structural diagram of an optical imaging lens according to Example 9 of the present application;

18A to 18D respectively show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the optical imaging lens of Example 9;

FIG19 is a schematic structural diagram of an optical imaging lens according to Embodiment 10 of the present application;

20A to 20D respectively show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the optical imaging lens of Example 10;

FIG21 is a schematic structural diagram of an optical imaging lens according to Example 11 of the present application;

22A to 22D respectively show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the optical imaging lens of Example 11;

FIG23 is a schematic structural diagram of an optical imaging lens according to Example 12 of the present application;

24A to 24D respectively show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the optical imaging lens of Example 12.

Detailed ways

In order to better understand the present application, a more detailed description will be made of various aspects of the present application with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of exemplary embodiments of the present application, and are not intended to limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements. 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 of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, without departing from the teaching of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for ease of explanation. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the drawings. The drawings are only examples and are not drawn strictly to scale.

In this article, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface 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 position of the concave surface 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 of the lens, and the surface of each lens closest to the imaging plane is called the image side of the lens.

It should also be understood that the terms "comprises", "including", "having", "includes" and/or "comprising", when used in this specification, indicate the presence of the stated features, elements and/or components, but do not exclude the presence or addition of one or more other features, elements, components and/or combinations thereof. In addition, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire listed features rather than modifying the individual elements in the list. In addition, when describing embodiments of the present application, "may" is used to mean "one or more embodiments of the present application". And, the term "exemplary" is intended to refer to an example or illustration.

Unless otherwise defined, all terms (including technical terms and scientific terms) used in this article have the same meaning as commonly understood by ordinary technicians in the field to which this application belongs. It should also be understood that terms (such as terms defined in commonly used dictionaries) should be interpreted as having the same meaning as their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal sense unless explicitly defined in this article.

It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

The features, principles and other aspects of the present application are described in detail below.

The optical imaging lens according to the exemplary embodiment of the present application may include, for example, eight lenses with optical power, namely, 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. The eight lenses are arranged in sequence from the object side to the image side along the optical axis, and each adjacent lens may have an air gap between them.

In an exemplary embodiment, the first lens may have positive power, its object side surface may be convex, and its image side surface may be concave; the second lens has positive power or negative power; the third lens may have negative power, and its image side surface may be concave; the fourth lens has positive power or negative power; the fifth lens has positive power or negative power; the sixth lens may have negative power; the seventh lens has positive power or negative power; and the eighth lens has positive power or negative power. Reasonable allocation of the system's power can effectively correct the spherical aberration and chromatic aberration of the system, and can also avoid excessive concentration of power on a single lens, reduce the sensitivity of the lens, and provide more relaxed tolerance conditions for actual processing and assembly processes.

In example embodiments, the second lens may have positive refractive power, an object-side surface thereof may be convex, and an image-side surface thereof may be convex.

In example embodiments, the object-side surface of the third lens may be a concave surface.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula TTL/f＜1.0, where TTL is the distance from the object side of the first lens to the imaging surface of the optical imaging lens on the optical axis, and f is the total effective focal length of the optical imaging lens. More specifically, TTL and f may further satisfy 0.87≤TTL/f≤0.93. Satisfying TTL/f＜1.0 can maintain a small size of the lens while having a longer focal length, so as to achieve good imaging effects when shooting in a long-range view.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 20°＜semi-FOV＜25°, where semi-FOV is half of the maximum field of view of the optical imaging lens. More specifically, semi-FOV may further satisfy 21.1°≤semi-FOV≤22.0°. Reasonable control of the field of view of the system can ensure that the edge field of view has a higher resolution and a higher relative brightness when shooting in the long-range.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 0.7＜f3/f6＜1.2, where f3 is the effective focal length of the third lens and f6 is the effective focal length of the sixth lens. More specifically, f3 and f6 may further satisfy 0.8≤f3/f6≤1.0, for example, 0.81≤f3/f6≤0.94. Reasonable allocation of the focal length of the third lens and the sixth lens can effectively balance the astigmatism and vertical axis chromatic aberration generated by the two lenses, and at the same time can slow down the deflection of light between the two lenses, thereby reducing the effective aperture of the fourth lens and the fifth lens.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 1.5＜f/(R1+R2+R3+R4)＜2.0, wherein f is the total effective focal length of the optical imaging lens, 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. More specifically, f, R1, R2, R3 and R4 may further satisfy 1.53≤f/(R1+R2+R3+R4)≤1.81. By controlling the radius of curvature of the first lens and the second lens, the incident angle and the exit angle of the light on the two lenses are reduced, the sensitivity of the lenses is reduced, and the high-order coma generated by the two lenses can be effectively balanced.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 2＜f/f12＜2.5, where f is the total effective focal length of the optical imaging lens, and f12 is the combined focal length of the first lens and the second lens. More specifically, f and f12 may further satisfy 2.18≤f/f12≤2.30. Reasonable control of the ratio of the total focal length of the system to the combined focal length of the first lens and the second lens can avoid excessive concentration of optical power on the two lenses, and also avoid large spherical aberration and chromatic aberration of the two lenses.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 0＜R12/R13＜0.5, wherein R12 is the radius of curvature of the image side surface of the sixth lens, and R13 is the radius of curvature of the object side surface of the seventh lens. More specifically, R12 and R13 may further satisfy 0.15≤R12/R13≤0.42. By controlling the ratio of the radius of curvature of the image side surface of the sixth lens and the object side surface of the seventh lens within a reasonable range, the light is deflected more smoothly from the image side surface of the sixth lens to the object side surface of the seventh lens, and the coma, astigmatism and field curvature generated by the two lenses can be effectively reduced. Optionally, the image side surface of the sixth lens may be a concave surface, and the object side surface of the seventh lens may be a convex surface.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 0.9＜|R5+R6|/f＜1.4, wherein R5 is the radius of curvature of the object side surface of the third lens, R6 is the radius of curvature of the image side surface of the third lens, and f is the total effective focal length of the optical imaging lens. More specifically, R5, R6 and f may further satisfy 1.07≤|R5+R6|/f≤1.14. Reasonable allocation of the radius of curvature of the object side surface and the image side surface of the third lens can reduce the incident angle and the exit angle of the light at the third lens, reduce the sensitivity of the lens, and in addition, can effectively balance the high-order spherical aberration and astigmatism generated by the first two lenses (i.e., the first lens and the second lens).

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 1.8＜(CT1+CT4+CT5)×10/TTL＜2.3, wherein CT1 is the center thickness of the first lens on the optical axis, CT4 is the center thickness of the fourth lens on the optical axis, CT5 is the center thickness of the fifth lens on the optical axis, and TTL is the distance from the object side of the first lens to the imaging surface of the optical imaging lens on the optical axis. More specifically, CT1, CT4, CT5 and TTL may further satisfy 1.94≤(CT1+CT4+CT5)×10/TTL≤2.00. By reasonably controlling the center thickness of the first lens, the fourth lens and the fifth lens on the optical axis, the size of the front end of the lens can be reduced while ensuring processability, and the coma and axial chromatic aberration generated by the three lenses can be effectively balanced.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 0.6＜CT7/(T78+CT8)＜1.6, wherein CT7 is the center thickness of the seventh lens on the optical axis, T78 is the spacing distance between the seventh lens and the eighth lens on the optical axis, and CT8 is the center thickness of the eighth lens on the optical axis. More specifically, CT7, T78, and CT8 may further satisfy 0.61≤CT7/(T78+CT8)≤1.59. Satisfying the conditional formula 0.6＜CT7/(T78+CT8)＜1.6 can reduce the size of the rear end of the lens while satisfying processability, and at the same time help to further balance the distortion and field curvature that are not completely eliminated by the front lens.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 1.2＜DT11/DT31＜1.7, wherein DT11 is the maximum effective semi-aperture of the object side of the first lens, and DT31 is the maximum effective semi-aperture of the object side of the third lens. More specifically, DT11 and DT31 may further satisfy 1.50≤DT11/DT31≤1.58. Reasonable allocation of the maximum effective semi-aperture of the object side of the first lens and the third lens can not only reduce the size of the front end of the lens, but also increase the light transmittance of the edge field of view, thereby improving the illumination of the edge field of view.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 2.3＜DT82/DT32＜3.3, wherein DT82 is the maximum effective semi-aperture of the image side of the eighth lens, and DT32 is the maximum effective semi-aperture of the image side of the third lens. More specifically, DT82 and DT32 may further satisfy 2.54≤DT82/DT32≤3.19. By controlling the maximum effective semi-aperture of the image side of the eighth lens and the third lens, the rear end size of the lens may be reduced, and at the same time, under the premise of ensuring the illumination of the edge field of view, the light with poor imaging quality may be eliminated to ensure excellent imaging quality.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 1.6＜ImgH/(T34+T56)＜2.1, wherein ImgH is half of the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens, T34 is the spacing distance between the third lens and the fourth lens on the optical axis, and T56 is the spacing distance between the fifth lens and the sixth lens on the optical axis. More specifically, ImgH, T34 and T56 may further satisfy 1.81≤ImgH/(T34+T56)≤1.94. Satisfying the conditional formula 1.6＜ImgH/(T34+T56)＜2.1 can not only ensure that the edge field of view has a higher resolution when shooting long-range shots, but also further shorten the lens size. In addition, such an arrangement also eases the angle at which light enters the fourth lens and the sixth lens, reducing the sensitivity of these two lenses.

In an exemplary embodiment, the optical imaging lens may further include an aperture to improve the imaging quality of the lens. Those skilled in the art should understand that the aperture may be set at any position as required.

Optionally, the imaging lens may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element located on the imaging surface.

The optical imaging lens according to the above-mentioned embodiment of the present application may use multiple lenses, such as the eight lenses mentioned above. By reasonably allocating the focal length, surface shape, center thickness of each lens, and the on-axis spacing between lenses, etc., the size of the lens can be effectively reduced, the sensitivity of the lens can be reduced, and the processability of the lens can be improved, so that the imaging lens is more conducive to production and processing and can be applied to portable electronic products such as mobile phones. The imaging lens with the above configuration can also have the characteristics of long focal length, small size, high resolution, and high imaging quality.

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 and the image side surface of each lens in the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens is an aspherical mirror surface. The characteristic of the aspherical lens is that the curvature changes continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has a better curvature radius characteristic, and has the advantages of improving distortion aberration and improving astigmatism aberration. After adopting an aspherical lens, the aberration occurring during imaging can be eliminated as much as possible, thereby improving the imaging quality. Optionally, the object side surface and the image side surface of each lens in the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens are all aspherical mirror surfaces.

However, those skilled in the art should understand that, without departing from the technical solution claimed in the present application, the number of lenses constituting the optical imaging lens can be changed to obtain the various results and advantages described in this specification. For example, although eight lenses are described as an example in the embodiments, the optical imaging lens is not limited to including eight lenses. If necessary, the optical imaging lens may also include other numbers of lenses.

Specific embodiments of the optical imaging lens applicable to the above-mentioned embodiments are further described below with reference to the accompanying drawings.

Example 1

The optical imaging lens according to Embodiment 1 of the present application is described below with reference to Figures 1 to 2D. Figure 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 according to an exemplary embodiment of the present application includes, in order from the object side to the image side along the optical axis, 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 filter E9 and an imaging surface S19.

The first lens E1 has positive focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has positive focal power, and its object side surface S3 is convex, and its image side surface S4 is convex. The third lens E3 has negative focal power, and its object side surface S5 is concave, and its image side surface S6 is concave. The fourth lens E4 has positive focal power, and its object side surface S7 is concave, and its image side surface S8 is convex. The fifth lens E5 has negative focal power, and its object side surface S9 is concave, and its image side surface S10 is convex. The sixth lens E6 has negative focal power, and its object side surface S11 is concave, and its image side surface S12 is concave. The seventh lens E7 has positive focal power, and its object side surface S13 is convex, and its image side surface S14 is convex. The eighth lens E8 has positive focal power, and its object side surface S15 is concave, and its image side surface S16 is convex. The filter E9 has an object side surface S17 and an image side surface S18. Light from an object passes through the surfaces S1 to S18 in sequence and is finally imaged on the imaging surface S19.

The optical imaging lens in this embodiment may also be provided with a diaphragm for limiting the light beam to improve the imaging quality.

Table 1 shows the surface type, curvature radius, thickness, material and conic coefficient of each lens of the optical imaging lens of Example 1, wherein the units of the curvature radius and thickness are both millimeters (mm).

Table 1

As can be seen from Table 1, the object side surface and the image side surface of any lens from the first lens E1 to the eighth lens E8 are both aspherical surfaces. In this embodiment, the surface shape x of each aspherical lens can be defined by but not limited to the following aspherical surface formula:

Wherein, x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c=1/R (i.e., the paraxial curvature c is the reciprocal of the curvature radius R in Table 1 above); k is the cone coefficient (given in Table 1); Ai is the correction coefficient of the i-th order of the aspheric surface. Table 2 below gives the high-order coefficients A ₄ , A ₆ , A ₈ , A ₁₀ , A ₁₂ , A ₁₄ , A ₁₆ , A ₁₈ and A ₂₀ that can be used for each aspheric mirror surface S1-S16 in Example 1.

Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -4.4800E-03 3.0700E-04 -7.4500E-03 1.4016E-02 -1.7730E-02 1.2743E-02 -5.3400E-03 1.1020E-03 -7.8000E-05 S2 2.2984E-02 -1.1760E-02 7.2278E-02 -1.2343E-01 1.3037E-01 -1.0325E-01 5.3198E-02 -1.4950E-02 1.7310E-03 S3 2.1876E-02 -1.4150E-02 1.1707E-01 -2.1224E-01 2.3055E-01 -1.7191E-01 8.1944E-02 -2.1510E-02 2.3250E-03 S4 1.3823E-02 1.1017E-02 2.2836E-02 -8.9830E-02 1.3516E-01 -1.1786E-01 6.2217E-02 -1.8580E-02 2.3930E-03 S5 -8.7800E-03 5.1589E-02 1.6230E-01 -8.3666E-01 1.8383E+00 -2.3184E+00 1.7281E+00 -7.0938E-01 1.2395E-01 S6 -1.3520E-02 9.8413E-02 1.0000E-03 -8.5290E-02 -3.3832E-01 1.9584E+00 -3.3865E+00 2.6056E+00 -7.4154E-01 S7 -1.3582E-01 1.1820E-02 -8.7700E-02 3.4076E-01 -5.7273E-01 6.3231E-01 -4.2601E-01 1.6677E-01 -3.0340E-02 S8 -1.1970E-01 4.3139E-02 -2.3840E-01 7.4643E-01 -1.1886E+00 1.1719E+00 -7.1187E-01 2.4681E-01 -3.7310E-02 S9 2.4034E-02 -1.4295E-01 2.9004E-01 -3.5489E-01 3.4471E-01 -2.7041E-01 1.4619E-01 -4.5220E-02 5.9060E-03 S10 4.2950E-02 -1.5360E-01 3.0640E-01 -3.7167E-01 3.1547E-01 -1.9300E-01 7.9793E-02 -1.9400E-02 2.0520E-03 S11 -9.8380E-02 -1.0454E-01 2.9232E-01 -4.4360E-01 4.4393E-01 -2.7884E-01 1.0423E-01 -2.1070E-02 1.7730E-03 S12 -2.4194E-01 2.6546E-01 -2.3770E-01 1.2862E-01 -3.9780E-02 6.0910E-03 -1.0000E-04 -9.5000E-05 9.0800E-06 S13 -1.8602E-01 2.8784E-01 -2.6448E-01 1.4715E-01 -5.2140E-02 1.1987E-02 -1.7400E-03 1.4700E-04 -5.4000E-06 S14 -1.1893E-01 1.3037E-01 -1.1649E-01 7.1490E-02 -2.9240E-02 7.7350E-03 -1.2500E-03 1.1300E-04 -4.3000E-06 S15 -8.1980E-02 1.5911E-01 -1.4949E-01 7.7431E-02 -2.4450E-02 4.8790E-03 -6.0000E-04 4.2500E-05 -1.3000E-06 S16 -9.5900E-02 1.5545E-01 -1.2682E-01 5.8623E-02 -1.6660E-02 2.9970E-03 -3.3000E-04 2.1300E-05 -5.9000E-07

Table 2

Table 3 shows the effective focal lengths f1 to f8 of each lens in Example 1, the total effective focal length f of the optical imaging lens, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S19, half the diagonal length of the effective pixel area on the imaging surface S19 ImgH, and half of the maximum field of view angle semi-FOV.

f1(mm) 4.15 f7(mm) 11.01 f2(mm) 10.08 f8(mm) 28.42 f3(mm) -3.93 f(mm) 6.97 f4(mm) 49.79 TTL(mm) 6.35 f5(mm) -245.70 ImgH(mm) 2.78 f6(mm) -4.39 semi-FOV(°) 21.8

table 3

The optical imaging lens in Example 1 satisfies:

TTL/f=0.91, where TTL is the distance from the object-side surface S1 of the first lens E1 to the imaging surface S19 on the optical axis, and f is the total effective focal length of the optical imaging lens;

f3/f6=0.90, wherein f3 is the effective focal length of the third lens E3, and f6 is the effective focal length of the sixth lens E6;

f/(R1+R2+R3+R4)=1.71, where f is the total effective focal length of the optical imaging lens, R1 is the curvature radius of the object-side surface S1 of the first lens E1, R2 is the curvature radius of the image-side surface S2 of the first lens E1, R3 is the curvature radius of the object-side surface S3 of the second lens E2, and R4 is the curvature radius of the image-side surface S4 of the second lens E2;

f/f12=2.23, where f is the total effective focal length of the optical imaging lens, and f12 is the combined focal length of the first lens E1 and the second lens E2;

R12/R13=0.34, where R12 is the curvature radius of the image-side surface S12 of the sixth lens E6, and R13 is the curvature radius of the object-side surface S13 of the seventh lens E7;

|R5+R6|/f=1.12, where R5 is the curvature radius of the object-side surface S5 of the third lens E3, R6 is the curvature radius of the image-side surface S6 of the third lens E3, and f is the total effective focal length of the optical imaging lens;

(CT1+CT4+CT5)×10/TTL=1.97, wherein CT1 is the center thickness of the first lens E1 on the optical axis, CT4 is the center thickness of the fourth lens E4 on the optical axis, CT5 is the center thickness of the fifth lens E5 on the optical axis, and TTL is the distance from the object side surface S1 of the first lens E1 to the imaging surface S19 on the optical axis;

CT7/(T78+CT8)=1.50, wherein CT7 is the center thickness of the seventh lens E7 on the optical axis, T78 is the distance between the seventh lens E7 and the eighth lens E8 on the optical axis, and CT8 is the center thickness of the eighth lens E8 on the optical axis;

DT11/DT31=1.55, wherein DT11 is the maximum effective semi-aperture of the object-side surface S1 of the first lens E1, and DT31 is the maximum effective semi-aperture of the object-side surface S5 of the third lens E3;

DT82/DT32=3.01, wherein DT82 is the maximum effective semi-aperture of the image-side surface S16 of the eighth lens E8, and DT32 is the maximum effective semi-aperture of the image-side surface S6 of the third lens E3;

ImgH/(T34+T56)=1.86, where ImgH is half of the diagonal length of the effective pixel area on the imaging surface S19, T34 is the distance between the third lens E3 and the fourth lens E4 on the optical axis, and T56 is the distance between the fifth lens E5 and the sixth lens E6 on the optical axis.

FIG. 2A shows an on-axis chromatic aberration curve of the optical imaging lens of Example 1, which indicates the deviation of light rays of different wavelengths from the focal point after passing through the lens. FIG. 2B shows an astigmatism curve of the optical imaging lens of Example 1, which indicates the meridional image curvature and the sagittal image curvature. FIG. 2C shows a distortion curve of the optical imaging lens of Example 1, which indicates the distortion magnitude values under different fields of view. FIG. 2D shows a magnification chromatic aberration curve of the optical imaging lens of Example 1, which indicates the deviation of different image heights on the imaging plane after light rays pass through the lens. It can be seen from FIGS. 2A to 2D that the optical imaging lens provided in Example 1 can achieve good imaging quality.

Example 2

The optical imaging lens according to Embodiment 2 of the present application is described below with reference to FIGS. 3 to 4D. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to Embodiment 1 are omitted. 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 according to an exemplary embodiment of the present application includes, in order from the object side to the image side along the optical axis, 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 filter E9 and an imaging surface S19.

The first lens E1 has positive focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has positive focal power, and its object side surface S3 is convex, and its image side surface S4 is convex. The third lens E3 has negative focal power, and its object side surface S5 is concave, and its image side surface S6 is concave. The fourth lens E4 has positive focal power, and its object side surface S7 is concave, and its image side surface S8 is convex. The fifth lens E5 has negative focal power, and its object side surface S9 is concave, and its image side surface S10 is convex. The sixth lens E6 has negative focal power, and its object side surface S11 is concave, and its image side surface S12 is concave. The seventh lens E7 has positive focal power, and its object side surface S13 is convex, and its image side surface S14 is concave. The eighth lens E8 has positive focal power, and its object side surface S15 is convex, and its image side surface S16 is convex. The filter E9 has an object side surface S17 and an image side surface S18. Light from an object passes through the surfaces S1 to S18 in sequence and is finally imaged on the imaging surface S19.

The optical imaging lens in this embodiment may also be provided with a diaphragm for limiting the light beam to improve the imaging quality.

Table 4 shows the surface type, curvature radius, thickness, material and conic coefficient of each lens of the optical imaging lens of Example 2, wherein the units of the curvature radius and thickness are both millimeters (mm).

Table 4

It can be seen from Table 4 that in Example 2, the object side surface and the image side surface of any lens from the first lens E1 to the eighth lens E8 are aspherical surfaces. Table 5 shows the high-order coefficients of each aspherical mirror surface that can be used in Example 2, wherein the surface shape of each aspherical surface can be defined by the formula (1) given in the above Example 1.

table 5

Table 6 shows the effective focal lengths f1 to f8 of each lens in Example 2, the total effective focal length f of the optical imaging lens, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S19, half the diagonal length of the effective pixel area on the imaging surface S19 ImgH, and half of the maximum field of view angle semi-FOV.

f1(mm) 4.15 f7(mm) 66.38 f2(mm) 10.08 f8(mm) 9.17 f3(mm) -3.93 f(mm) 6.95 f4(mm) 50.43 TTL(mm) 6.37 f5(mm) -269.33 ImgH(mm) 2.79 f6(mm) -4.44 semi-FOV(°) 22.0

Table 6

FIG. 4A shows an axial chromatic aberration curve of the optical imaging lens of Example 2, which indicates the deviation of light rays of different wavelengths from the focal point after passing through the lens. FIG. 4B shows an astigmatism curve of the optical imaging lens of Example 2, which indicates the meridional image curvature and the sagittal image curvature. FIG. 4C shows a distortion curve of the optical imaging lens of Example 2, which indicates the distortion magnitude values under different fields of view. FIG. 4D shows a magnification chromatic aberration curve of the optical imaging lens of Example 2, which indicates the deviation of different image heights on the imaging plane after light rays pass through the lens. It can be seen from FIGS. 4A to 4D that the optical imaging lens provided in Example 2 can achieve good imaging quality.

Example 3

The optical imaging lens according to Embodiment 3 of the present application is described below with reference to Figures 5 to 6D. Figure 5 shows a schematic structural diagram of the optical imaging lens according to Embodiment 3 of the present application.

As shown in FIG. 5 , the optical imaging lens according to an exemplary embodiment of the present application includes, in order from the object side to the image side along the optical axis, 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 filter E9 and an imaging surface S19.

The first lens E1 has positive focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has positive focal power, and its object side surface S3 is convex, and its image side surface S4 is convex. The third lens E3 has negative focal power, and its object side surface S5 is concave, and its image side surface S6 is concave. The fourth lens E4 has positive focal power, and its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has negative focal power, and its object side surface S9 is concave, and its image side surface S10 is convex. The sixth lens E6 has negative focal power, and its object side surface S11 is concave, and its image side surface S12 is concave. The seventh lens E7 has positive focal power, and its object side surface S13 is convex, and its image side surface S14 is concave. The eighth lens E8 has positive focal power, and its object side surface S15 is convex, and its image side surface S16 is concave. The filter E9 has an object side surface S17 and an image side surface S18. Light from an object passes through the surfaces S1 to S18 in sequence and is finally imaged on the imaging surface S19.

The optical imaging lens in this embodiment may also be provided with a diaphragm for limiting the light beam to improve the imaging quality.

Table 7 shows the surface type, curvature radius, thickness, material and conic coefficient of each lens of the optical imaging lens of Example 3, wherein the units of the curvature radius and thickness are both millimeters (mm).

Table 7

It can be seen from Table 7 that in Example 3, the object side surface and the image side surface of any lens from the first lens E1 to the eighth lens E8 are aspherical surfaces. Table 8 shows the high-order coefficients of each aspherical mirror surface that can be used in Example 3, wherein the surface shape of each aspherical surface can be defined by the formula (1) given in the above Example 1.

Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -4.2824E-03 -4.2000E-04 -6.6400E-03 1.3759E-02 -1.7870E-02 1.2881E-02 -5.3800E-03 1.1060E-03 -7.8000E-05 S2 2.3048E-02 -1.1520E-02 7.1458E-02 -1.2244E-01 1.2978E-01 -1.0307E-01 5.3177E-02 -1.4950E-02 1.7310E-03 S3 2.1637E-02 -1.3750E-02 1.1677E-01 -2.1214E-01 2.3054E-01 -1.7191E-01 8.1945E-02 -2.1520E-02 2.3250E-03 S4 1.3907E-02 1.0931E-02 2.2867E-02 -8.9820E-02 1.3515E-01 -1.1785E-01 6.2210E-02 -1.8580E-02 2.3930E-03 S5 -1.3826E-02 1.4302E-01 -4.9796E-01 1.7035E+00 -3.9504E+00 5.7545E+00 -5.0408E+00 2.4251E+00 -4.9213E-01 S6 -1.8967E-02 2.2064E-01 -1.1616E+00 6.0583E+00 -1.9962E+01 4.0901E+01 -5.0470E+01 3.4424E+01 -9.9661E+00 S7 -1.3837E-01 3.0053E-02 -1.0542E-01 2.7500E-01 -3.8611E-01 4.3064E-01 -3.2274E-01 1.4693E-01 -3.1050E-02 S8 -1.2297E-01 8.8240E-02 -5.2360E-01 1.6793E+00 -2.9705E+00 3.2494E+00 -2.1653E+00 8.0689E-01 -1.2864E-01 S9 2.6564E-02 -1.8275E-01 4.8562E-01 -8.5097E-01 1.0726E+00 -9.1332E-01 4.8375E-01 -1.4234E-01 1.7702E-02 S10 4.1340E-02 -1.3586E-01 2.3115E-01 -2.0603E-01 1.0620E-01 -3.4110E-02 7.9930E-03 -1.5800E-03 1.8200E-04 S11 -1.0059E-01 -1.0461E-01 3.0841E-01 -4.8945E-01 5.0656E-01 -3.2672E-01 1.2508E-01 -2.5910E-02 2.2370E-03 S12 -2.4060E-01 2.6376E-01 -2.3811E-01 1.3286E-01 -4.4920E-02 9.0690E-03 -1.0300E-03 5.7300E-05 -9.9000E-07 S13 -1.7947E-01 3.1035E-01 -3.5084E-01 2.3509E-01 -9.7870E-02 2.5964E-02 -4.3000E-03 4.0700E-04 -1.7000E-05 S14 -9.2053E-02 1.7273E-01 -2.2086E-01 1.3919E-01 -5.0630E-02 1.1294E-02 -1.5100E-03 1.0900E-04 -3.1000E-06 S15 -1.5031E-02 7.4186E-02 -6.8050E-02 2.4118E-02 -3.7600E-03 1.3500E-04 3.0500E-05 -3.4000E-06 8.6900E-08 S16 -5.7532E-02 4.7140E-02 -1.0920E-02 -3.6000E-03 2.2410E-03 -4.0000E-04 1.8800E-05 1.8500E-06 -1.7000E-07

Table 8

Table 9 shows the effective focal lengths f1 to f8 of each lens in Example 3, the total effective focal length f of the optical imaging lens, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S19, half the diagonal length of the effective pixel area on the imaging surface S19 ImgH, and half of the maximum field of view angle semi-FOV.

f1(mm) 4.15 f7(mm) 315.32 f2(mm) 10.08 f8(mm) 8.74 f3(mm) -3.92 f(mm) 6.95 f4(mm) 23.53 TTL(mm) 6.31 f5(mm) -32.65 ImgH(mm) 2.73 f6(mm) -4.42 semi-FOV(°) 21.7

Table 9

FIG6A shows an on-axis chromatic aberration curve of the optical imaging lens of Example 3, which indicates the deviation of light of different wavelengths from the focal point after passing through the lens. FIG6B shows an astigmatism curve of the optical imaging lens of Example 3, which indicates the meridional image curvature and the sagittal image curvature. FIG6C shows a distortion curve of the optical imaging lens of Example 3, which indicates the distortion magnitude value under different fields of view. FIG6D shows a magnification chromatic aberration curve of the optical imaging lens of Example 3, which indicates the deviation of different image heights on the imaging plane after the light passes through the lens. It can be seen from FIG6A to FIG6D that the optical imaging lens provided in Example 3 can achieve good imaging quality.

Example 4

The optical imaging lens according to Embodiment 4 of the present application is described below with reference to Figures 7 to 8D. Figure 7 shows a schematic structural diagram of the optical imaging lens according to Embodiment 4 of the present application.

As shown in FIG. 7 , the optical imaging lens according to an exemplary embodiment of the present application includes, in order from the object side to the image side along the optical axis, 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 filter E9 and an imaging surface S19.

The first lens E1 has positive focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has positive focal power, and its object side surface S3 is convex, and its image side surface S4 is convex. The third lens E3 has negative focal power, and its object side surface S5 is concave, and its image side surface S6 is concave. The fourth lens E4 has positive focal power, and its object side surface S7 is concave, and its image side surface S8 is convex. The fifth lens E5 has positive focal power, and its object side surface S9 is concave, and its image side surface S10 is convex. The sixth lens E6 has negative focal power, and its object side surface S11 is concave, and its image side surface S12 is concave. The seventh lens E7 has negative focal power, and its object side surface S13 is convex, and its image side surface S14 is concave. The eighth lens E8 has positive focal power, and its object side surface S15 is convex, and its image side surface S16 is concave. The filter E9 has an object side surface S17 and an image side surface S18. Light from an object passes through the surfaces S1 to S18 in sequence and is finally imaged on the imaging surface S19.

The optical imaging lens in this embodiment may also be provided with a diaphragm for limiting the light beam to improve the imaging quality.

Table 10 shows the surface type, curvature radius, thickness, material and conic coefficient of each lens of the optical imaging lens of Example 4, wherein the units of the curvature radius and thickness are both millimeters (mm).

Table 10

It can be seen from Table 10 that in Example 4, the object side surface and the image side surface of any lens from the first lens E1 to the eighth lens E8 are aspherical surfaces. Table 11 shows the high-order coefficients of each aspherical mirror surface that can be used in Example 4, wherein the surface shape of each aspherical surface can be defined by the formula (1) given in the above Example 1.

Table 11

Table 12 shows the effective focal lengths f1 to f8 of the lenses in Example 4, the total effective focal length f of the optical imaging lens, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S19, half the diagonal length of the effective pixel area on the imaging surface S19 ImgH, and half of the maximum field of view angle semi-FOV.

f1(mm) 4.15 f7(mm) -38.25 f2(mm) 10.08 f8(mm) 5.97 f3(mm) -3.93 f(mm) 6.95 f4(mm) 65.66 TTL(mm) 6.40 f5(mm) 520.05 ImgH(mm) 2.79 f6(mm) -4.18 semi-FOV(°) 21.9

Table 12

FIG8A shows an on-axis chromatic aberration curve of the optical imaging lens of Example 4, which indicates the deviation of light of different wavelengths from the focal point after passing through the lens. FIG8B shows an astigmatism curve of the optical imaging lens of Example 4, which indicates the meridional image curvature and the sagittal image curvature. FIG8C shows a distortion curve of the optical imaging lens of Example 4, which indicates the distortion magnitude value under different fields of view. FIG8D shows a magnification chromatic aberration curve of the optical imaging lens of Example 4, which indicates the deviation of different image heights on the imaging plane after light passes through the lens. It can be seen from FIG8A to FIG8D that the optical imaging lens provided in Example 4 can achieve good imaging quality.

Example 5

The optical imaging lens according to Embodiment 5 of the present application is described below with reference to Figures 9 to 10D. Figure 9 shows a schematic structural diagram of the optical imaging lens according to Embodiment 5 of the present application.

As shown in FIG. 9 , the optical imaging lens according to an exemplary embodiment of the present application includes, in order from the object side to the image side along the optical axis, 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 filter E9 and an imaging surface S19.

The first lens E1 has positive focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has positive focal power, and its object side surface S3 is convex, and its image side surface S4 is convex. The third lens E3 has negative focal power, and its object side surface S5 is concave, and its image side surface S6 is concave. The fourth lens E4 has positive focal power, and its object side surface S7 is concave, and its image side surface S8 is convex. The fifth lens E5 has negative focal power, and its object side surface S9 is concave, and its image side surface S10 is convex. The sixth lens E6 has negative focal power, and its object side surface S11 is concave, and its image side surface S12 is concave. The seventh lens E7 has positive focal power, and its object side surface S13 is convex, and its image side surface S14 is convex. The eighth lens E8 has negative focal power, and its object side surface S15 is concave, and its image side surface S16 is convex. The filter E9 has an object side surface S17 and an image side surface S18. Light from an object passes through the surfaces S1 to S18 in sequence and is finally imaged on the imaging surface S19.

The optical imaging lens in this embodiment may also be provided with a diaphragm for limiting the light beam to improve the imaging quality.

Table 13 shows the surface type, curvature radius, thickness, material and conic coefficient of each lens of the optical imaging lens of Example 5, wherein the units of the curvature radius and thickness are both millimeters (mm).

Table 13

It can be seen from Table 13 that in Example 5, the object side surface and the image side surface of any lens from the first lens E1 to the eighth lens E8 are aspherical surfaces. Table 14 shows the high-order coefficients of each aspherical mirror surface that can be used in Example 5, wherein the surface shape of each aspherical surface can be defined by the formula (1) given in the above Example 1.

Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -4.4774E-03 3.0680E-04 -7.4500E-03 1.4017E-02 -1.7730E-02 1.2743E-02 -5.3400E-03 1.1020E-03 -7.8000E-05 S2 2.2984E-02 -1.1764E-02 7.2277E-02 -1.2343E-01 1.3037E-01 -1.0325E-01 5.3198E-02 -1.4950E-02 1.7310E-03 S3 2.1876E-02 -1.4148E-02 1.1707E-01 -2.1224E-01 2.3055E-01 -1.7191E-01 8.1945E-02 -2.1520E-02 2.3250E-03 S4 1.3823E-02 1.1017E-02 2.2834E-02 -8.9820E-02 1.3515E-01 -1.1785E-01 6.2210E-02 -1.8580E-02 2.3930E-03 S5 -9.2964E-03 6.0066E-02 1.0820E-01 -6.5956E-01 1.5121E+00 -1.9764E+00 1.5373E+00 -6.6522E-01 1.2380E-01 S6 -1.2924E-02 9.0184E-02 4.2991E-02 -1.8547E-01 -2.2500E-01 1.9092E+00 -3.3864E+00 2.6055E+00 -7.4151E-01 S7 -1.3582E-01 1.1857E-02 -8.7980E-02 3.4191E-01 -5.7536E-01 6.3588E-01 -4.2886E-01 1.6801E-01 -3.0570E-02 S8 -1.1970E-01 4.3172E-02 -2.3871E-01 7.4775E-01 -1.1916E+00 1.1760E+00 -7.1505E-01 2.4816E-01 -3.7550E-02 S9 2.4051E-02 -1.4314E-01 2.9089E-01 -3.5692E-01 3.4760E-01 -2.7292E-01 1.4750E-01 -4.5600E-02 5.9510E-03 S10 4.2936E-02 -1.5346E-01 3.0584E-01 -3.7046E-01 3.1391E-01 -1.9178E-01 7.9224E-02 -1.9250E-02 2.0360E-03 S11 -9.8379E-02 -1.0458E-01 2.9246E-01 -4.4391E-01 4.4432E-01 -2.7913E-01 1.0435E-01 -2.1100E-02 1.7760E-03 S12 -2.4196E-01 2.6549E-01 -2.3776E-01 1.2869E-01 -3.9820E-02 6.1080E-03 -1.1000E-04 -9.4000E-05 9.0400E-06 S13 -2.4581E-01 4.5523E-01 -5.0171E-01 3.3737E-01 -1.4865E-01 4.3985E-02 -8.4600E-03 9.5000E-04 -4.7000E-05 S14 -1.7456E-01 3.1015E-01 -3.5529E-01 2.4128E-01 -1.0626E-01 3.1211E-02 -5.8800E-03 6.3500E-04 -3.0000E-05 S15 7.2310E-03 3.3755E-02 -5.4830E-02 2.0397E-02 6.7900E-04 -2.1700E-03 5.6100E-04 -6.0000E-05 2.4300E-06 S16 -1.3568E-01 1.4354E-01 -9.7710E-02 3.9253E-02 -9.4800E-03 1.3820E-03 -1.2000E-04 5.5500E-06 -1.1000E-07

Table 14

Table 15 shows the effective focal lengths f1 to f8 of each lens in Example 5, the total effective focal length f of the optical imaging lens, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S19, half the diagonal length of the effective pixel area on the imaging surface S19 ImgH, and half of the maximum field of view angle semi-FOV.

f1(mm) 4.15 f7(mm) 4.74 f2(mm) 10.08 f8(mm) -6.66 f3(mm) -3.93 f(mm) 7.00 f4(mm) 41.57 TTL(mm) 6.26 f5(mm) -146.60 ImgH(mm) 2.78 f6(mm) -4.84 semi-FOV(°) 22.0

Table 15

FIG10A shows an on-axis chromatic aberration curve of the optical imaging lens of Example 5, which indicates the deviation of light of different wavelengths from the focal point after passing through the lens. FIG10B shows an astigmatism curve of the optical imaging lens of Example 5, which indicates the meridional image curvature and the sagittal image curvature. FIG10C shows a distortion curve of the optical imaging lens of Example 5, which indicates the distortion magnitude value under different fields of view. FIG10D shows a magnification chromatic aberration curve of the optical imaging lens of Example 5, which indicates the deviation of different image heights on the imaging plane after light passes through the lens. It can be seen from FIGS. 10A to 10D that the optical imaging lens provided in Example 5 can achieve good imaging quality.

Example 6

The optical imaging lens according to Embodiment 6 of the present application is described below with reference to Figures 11 to 12D. Figure 11 shows a schematic structural diagram of the optical imaging lens according to Embodiment 6 of the present application.

As shown in FIG. 11 , the optical imaging lens according to an exemplary embodiment of the present application includes, in order from the object side to the image side along the optical axis, 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 filter E9 and an imaging surface S19.

The first lens E1 has positive focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has positive focal power, and its object side surface S3 is convex, and its image side surface S4 is convex. The third lens E3 has negative focal power, and its object side surface S5 is concave, and its image side surface S6 is concave. The fourth lens E4 has positive focal power, and its object side surface S7 is concave, and its image side surface S8 is convex. The fifth lens E5 has negative focal power, and its object side surface S9 is concave, and its image side surface S10 is convex. The sixth lens E6 has negative focal power, and its object side surface S11 is concave, and its image side surface S12 is concave. The seventh lens E7 has negative focal power, and its object side surface S13 is convex, and its image side surface S14 is concave. The eighth lens E8 has positive focal power, and its object side surface S15 is convex, and its image side surface S16 is concave. The filter E9 has an object side surface S17 and an image side surface S18. Light from an object passes through the surfaces S1 to S18 in sequence and is finally imaged on the imaging surface S19.

The optical imaging lens in this embodiment may also be provided with a diaphragm for limiting the light beam to improve the imaging quality.

Table 16 shows the surface type, curvature radius, thickness, material and conic coefficient of each lens of the optical imaging lens of Example 6, wherein the units of the curvature radius and thickness are both millimeters (mm).

Table 16

It can be seen from Table 16 that in Example 6, the object side surface and the image side surface of any lens from the first lens E1 to the eighth lens E8 are aspherical surfaces. Table 17 shows the high-order coefficients of each aspherical mirror surface that can be used in Example 6, wherein the surface shape of each aspherical surface can be defined by the formula (1) given in the above Example 1.

Table 17

Table 18 shows the effective focal lengths f1 to f8 of each lens in Example 6, the total effective focal length f of the optical imaging lens, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S19, half the diagonal length of the effective pixel area on the imaging surface S19 ImgH, and half of the maximum field of view angle semi-FOV.

f1(mm) 4.15 f7(mm) -67.65 f2(mm) 10.08 f8(mm) 8.37 f3(mm) -3.93 f(mm) 7.04 f4(mm) 48.93 TTL(mm) 6.33 f5(mm) -247.51 ImgH(mm) 2.82 f6(mm) -4.27 semi-FOV(°) 21.9

Table 18

FIG12A shows an axial chromatic aberration curve of the optical imaging lens of Example 6, which indicates the deviation of light rays of different wavelengths from the focal point after passing through the lens. FIG12B shows an astigmatism curve of the optical imaging lens of Example 6, which indicates the meridional image curvature and the sagittal image curvature. FIG12C shows a distortion curve of the optical imaging lens of Example 6, which indicates the distortion magnitude values under different fields of view. FIG12D shows a magnification chromatic aberration curve of the optical imaging lens of Example 6, which indicates the deviation of different image heights on the imaging plane after light rays pass through the lens. It can be seen from FIGS. 12A to 12D that the optical imaging lens provided in Example 6 can achieve good imaging quality.

Example 7

The optical imaging lens according to Embodiment 7 of the present application is described below with reference to Figures 13 to 14D. Figure 13 shows a schematic structural diagram of the optical imaging lens according to Embodiment 7 of the present application.

As shown in FIG. 13 , the optical imaging lens according to an exemplary embodiment of the present application includes, in order from the object side to the image side along the optical axis, 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 filter E9 and an imaging surface S19.

The first lens E1 has positive focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has positive focal power, and its object side surface S3 is convex, and its image side surface S4 is convex. The third lens E3 has negative focal power, and its object side surface S5 is concave, and its image side surface S6 is concave. The fourth lens E4 has positive focal power, and its object side surface S7 is concave, and its image side surface S8 is convex. The fifth lens E5 has negative focal power, and its object side surface S9 is concave, and its image side surface S10 is convex. The sixth lens E6 has negative focal power, and its object side surface S11 is concave, and its image side surface S12 is concave. The seventh lens E7 has positive focal power, and its object side surface S13 is convex, and its image side surface S14 is concave. The eighth lens E8 has negative focal power, and its object side surface S15 is concave, and its image side surface S16 is convex. The filter E9 has an object side surface S17 and an image side surface S18. Light from an object passes through the surfaces S1 to S18 in sequence and is finally imaged on the imaging surface S19.

The optical imaging lens in this embodiment may also be provided with a diaphragm for limiting the light beam to improve the imaging quality.

Table 19 shows the surface type, curvature radius, thickness, material and conic coefficient of each lens of the optical imaging lens of Example 7, wherein the units of the curvature radius and thickness are both millimeters (mm).

Table 19

It can be seen from Table 19 that in Example 7, the object side surface and the image side surface of any lens from the first lens E1 to the eighth lens E8 are aspherical surfaces. Table 20 shows the high-order coefficients of each aspherical mirror surface that can be used in Example 7, wherein the surface shape of each aspherical surface can be defined by the formula (1) given in the above Example 1.

Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -4.4774E-03 3.0680E-04 -7.4500E-03 1.4017E-02 -1.7730E-02 1.2743E-02 -5.3400E-03 1.1020E-03 -7.8000E-05 S2 2.2984E-02 -1.1764E-02 7.2277E-02 -1.2343E-01 1.3037E-01 -1.0325E-01 5.3198E-02 -1.4950E-02 1.7310E-03 S3 2.1876E-02 -1.4148E-02 1.1707E-01 -2.1224E-01 2.3055E-01 -1.7191E-01 8.1945E-02 -2.1520E-02 2.3250E-03 S4 1.3823E-02 1.1017E-02 2.2834E-02 -8.9820E-02 1.3515E-01 -1.1785E-01 6.2210E-02 -1.8580E-02 2.3930E-03 S5 -8.7840E-03 5.1617E-02 1.6211E-01 -8.3594E-01 1.8367E+00 -2.3162E+00 1.7264E+00 -7.0860E-01 1.2380E-01 S6 -1.3516E-02 9.8410E-02 1.0190E-03 -8.5340E-02 -3.3822E-01 1.9582E+00 -3.3864E+00 2.6055E+00 -7.4151E-01 S7 -1.3582E-01 1.1857E-02 -8.7980E-02 3.4191E-01 -5.7536E-01 6.3588E-01 -4.2886E-01 1.6801E-01 -3.0570E-02 S8 -1.1970E-01 4.3172E-02 -2.3871E-01 7.4775E-01 -1.1916E+00 1.1760E+00 -7.1505E-01 2.4816E-01 -3.7550E-02 S9 2.4051E-02 -1.4314E-01 2.9089E-01 -3.5692E-01 3.4760E-01 -2.7292E-01 1.4750E-01 -4.5600E-02 5.9510E-03 S10 4.2936E-02 -1.5346E-01 3.0584E-01 -3.7046E-01 3.1391E-01 -1.9178E-01 7.9224E-02 -1.9250E-02 2.0360E-03 S11 -9.8379E-02 -1.0458E-01 2.9246E-01 -4.4391E-01 4.4432E-01 -2.7913E-01 1.0435E-01 -2.1100E-02 1.7760E-03 S12 -2.4196E-01 2.6549E-01 -2.3776E-01 1.2869E-01 -3.9820E-02 6.1080E-03 -1.1000E-04 -9.4000E-05 9.0400E-06 S13 -1.9232E-01 2.5910E-01 -2.1180E-01 9.9610E-02 -2.7480E-02 4.2720E-03 -3.0000E-04 -3.5000E-06 1.2100E-06 S14 1.2344E-02 -7.6490E-02 5.8213E-02 -2.3900E-02 5.5060E-03 -7.0000E-04 6.1000E-05 -6.7000E-06 4.9000E-07 S15 1.0511E-02 7.4797E-02 -1.3727E-01 9.4664E-02 -3.6200E-02 8.4150E-03 -1.1900E-03 9.3300E-05 -3.2000E-06 S16 -1.8130E-01 3.0192E-01 -2.7503E-01 1.4363E-01 -4.6360E-02 9.5060E-03 -1.2100E-03 8.7900E-05 -2.8000E-06

Table 20

Table 21 shows the effective focal lengths f1 to f8 of each lens in Example 7, the total effective focal length f of the optical imaging lens, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S19, half the diagonal length of the effective pixel area on the imaging surface S19 ImgH, and half of the maximum field of view angle semi-FOV.

f1(mm) 4.15 f7(mm) 11.71 f2(mm) 10.08 f8(mm) -336.10 f3(mm) -3.93 f(mm) 7.13 f4(mm) 48.55 TTL(mm) 6.30 f5(mm) -240.50 ImgH(mm) 2.81 f6(mm) -4.44 semi-FOV(°) 21.7

Table 21

FIG14A shows the axial chromatic aberration curve of the optical imaging lens of Example 7, which indicates the deviation of light of different wavelengths from the focal point after passing through the lens. FIG14B shows the astigmatism curve of the optical imaging lens of Example 7, which indicates the meridional image curvature and the sagittal image curvature. FIG14C shows the distortion curve of the optical imaging lens of Example 7, which indicates the distortion magnitude value under different fields of view. FIG14D shows the magnification chromatic aberration curve of the optical imaging lens of Example 7, which indicates the deviation of different image heights on the imaging plane after the light passes through the lens. It can be seen from FIG14A to FIG14D that the optical imaging lens provided in Example 7 can achieve good imaging quality.

Example 8

The optical imaging lens according to Embodiment 8 of the present application is described below with reference to Figures 15 to 16D. Figure 15 shows a schematic structural diagram of the optical imaging lens according to Embodiment 8 of the present application.

As shown in FIG. 15 , the optical imaging lens according to an exemplary embodiment of the present application includes, in order from the object side to the image side along the optical axis, 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 filter E9 and an imaging surface S19.

The first lens E1 has positive focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has positive focal power, and its object side surface S3 is convex, and its image side surface S4 is convex. The third lens E3 has negative focal power, and its object side surface S5 is concave, and its image side surface S6 is concave. The fourth lens E4 has positive focal power, and its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has negative focal power, and its object side surface S9 is concave, and its image side surface S10 is concave. The sixth lens E6 has negative focal power, and its object side surface S11 is concave, and its image side surface S12 is concave. The seventh lens E7 has positive focal power, and its object side surface S13 is convex, and its image side surface S14 is concave. The eighth lens E8 has positive focal power, and its object side surface S15 is concave, and its image side surface S16 is convex. The filter E9 has an object side surface S17 and an image side surface S18. Light from an object passes through the surfaces S1 to S18 in sequence and is finally imaged on the imaging surface S19.

The optical imaging lens in this embodiment may also be provided with a diaphragm for limiting the light beam to improve the imaging quality.

Table 22 shows the surface type, curvature radius, thickness, material and cone coefficient of each lens of the optical imaging lens of Example 8, wherein the units of the curvature radius and thickness are both millimeters (mm).

Table 22

It can be seen from Table 22 that in Example 8, the object side surface and the image side surface of any lens from the first lens E1 to the eighth lens E8 are aspherical surfaces. Table 23 shows the high-order coefficients of each aspherical mirror surface that can be used in Example 8, wherein the surface shape of each aspherical surface can be defined by the formula (1) given in the above Example 1.

Table 23

Table 24 shows the effective focal lengths f1 to f8 of each lens in Example 8, the total effective focal length f of the optical imaging lens, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S19, half the diagonal length of the effective pixel area on the imaging surface S19 ImgH, and half of the maximum field of view angle semi-FOV.

f1(mm) 4.15 f7(mm) 29.35 f2(mm) 10.08 f8(mm) 43.72 f3(mm) -3.92 f(mm) 7.20 f4(mm) 22.14 TTL(mm) 6.28 f5(mm) -31.17 ImgH(mm) 2.78 f6(mm) -4.80 semi-FOV(°) 21.1

Table 24

FIG16A shows the axial chromatic aberration curve of the optical imaging lens of Example 8, which indicates the deviation of light of different wavelengths from the focal point after passing through the lens. FIG16B shows the astigmatism curve of the optical imaging lens of Example 8, which indicates the meridional image curvature and the sagittal image curvature. FIG16C shows the distortion curve of the optical imaging lens of Example 8, which indicates the distortion magnitude value under different fields of view. FIG16D shows the magnification chromatic aberration curve of the optical imaging lens of Example 8, which indicates the deviation of different image heights on the imaging plane after the light passes through the lens. It can be seen from FIG16A to FIG16D that the optical imaging lens provided in Example 8 can achieve good imaging quality.

Example 9

The optical imaging lens according to Embodiment 9 of the present application is described below with reference to Figures 17 to 18D. Figure 17 shows a schematic structural diagram of the optical imaging lens according to Embodiment 9 of the present application.

As shown in FIG. 17 , the optical imaging lens according to an exemplary embodiment of the present application includes, in order from the object side to the image side along the optical axis, 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 filter E9 and an imaging surface S19.

The first lens E1 has positive focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has positive focal power, and its object side surface S3 is convex, and its image side surface S4 is convex. The third lens E3 has negative focal power, and its object side surface S5 is concave, and its image side surface S6 is concave. The fourth lens E4 has negative focal power, and its object side surface S7 is convex, and its image side surface S8 is concave. The fifth lens E5 has positive focal power, and its object side surface S9 is concave, and its image side surface S10 is convex. The sixth lens E6 has negative focal power, and its object side surface S11 is concave, and its image side surface S12 is concave. The seventh lens E7 has positive focal power, and its object side surface S13 is convex, and its image side surface S14 is concave. The eighth lens E8 has positive focal power, and its object side surface S15 is convex, and its image side surface S16 is concave. The filter E9 has an object side surface S17 and an image side surface S18. Light from an object passes through the surfaces S1 to S18 in sequence and is finally imaged on the imaging surface S19.

The optical imaging lens in this embodiment may also be provided with a diaphragm for limiting the light beam to improve the imaging quality.

Table 25 shows the surface type, curvature radius, thickness, material and cone coefficient of each lens of the optical imaging lens of Example 9, wherein the units of the curvature radius and thickness are both millimeters (mm).

Table 25

It can be seen from Table 25 that in Example 9, the object side surface and the image side surface of any lens from the first lens E1 to the eighth lens E8 are all aspherical surfaces. Table 26 shows the high-order coefficients of each aspherical mirror surface that can be used in Example 9, wherein the surface shape of each aspherical surface can be defined by the formula (1) given in the above Example 1.

Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -4.6110E-03 4.5660E-04 -7.4900E-03 1.4061E-02 -1.7810E-02 1.2798E-02 -5.3600E-03 1.1060E-03 -7.9000E-05 S2 2.2989E-02 -1.1772E-02 7.2264E-02 -1.2338E-01 1.3031E-01 -1.0320E-01 5.3181E-02 -1.4950E-02 1.7300E-03 S3 2.1872E-02 -1.4162E-02 1.1719E-01 -2.1254E-01 2.3093E-01 -1.7220E-01 8.2076E-02 -2.1550E-02 2.3290E-03 S4 1.3826E-02 1.0991E-02 2.2930E-02 -9.0020E-02 1.3539E-01 -1.1804E-01 6.2307E-02 -1.8610E-02 2.3960E-03 S5 -9.1008E-03 5.7423E-02 1.2014E-01 -6.7112E-01 1.4433E+00 -1.7256E+00 1.1801E+00 -4.2416E-01 6.0087E-02 S6 -1.3611E-02 1.0852E-01 -1.5770E-01 9.8802E-01 -4.2714E+00 1.0389E+01 -1.3988E+01 9.8681E+00 -2.8380E+00 S7 -1.3602E-01 1.1572E-02 -7.6440E-02 2.8784E-01 -4.5358E-01 4.7876E-01 -3.0954E-01 1.1825E-01 -2.1780E-02 S8 -1.1898E-01 3.2421E-02 -1.6833E-01 5.0035E-01 -6.8547E-01 5.5311E-01 -2.6000E-01 6.6196E-02 -6.8600E-03 S9 2.3401E-02 -1.3451E-01 2.4903E-01 -2.5120E-01 1.9242E-01 -1.3558E-01 7.5227E-02 -2.4760E-02 3.4180E-03 S10 4.2740E-02 -1.5346E-01 3.0966E-01 -3.8329E-01 3.3302E-01 -2.0729E-01 8.6340E-02 -2.0990E-02 2.2110E-03 S11 -9.8673E-02 -1.0334E-01 2.9071E-01 -4.4208E-01 4.4296E-01 -2.7851E-01 1.0420E-01 -2.1090E-02 1.7760E-03 S12 -2.4356E-01 2.6930E-01 -2.4459E-01 1.3603E-01 -4.4720E-02 8.1530E-03 -6.2000E-04 -2.1000E-05 4.7100E-06 S13 -1.6843E-01 2.3922E-01 -1.9571E-01 9.2992E-02 -2.7750E-02 5.5690E-03 -7.9000E-04 7.4200E-05 -3.5000E-06 S14 -6.0811E-02 -2.7759E-02 6.5381E-02 -3.8660E-02 8.0620E-03 8.2700E-04 -6.7000E-04 1.1000E-04 -6.2000E-06 S15 -1.5152E-03 -3.1036E-02 4.7944E-02 -3.6600E-02 1.5049E-02 -3.5000E-03 4.6400E-04 -3.3000E-05 9.4400E-07 S16 -6.1695E-02 9.6071E-02 -7.5840E-02 3.3630E-02 -9.5200E-03 1.8420E-03 -2.4000E-04 1.8700E-05 -6.4000E-07

Table 26

Table 27 shows the effective focal lengths f1 to f8 of each lens in Example 9, the total effective focal length f of the optical imaging lens, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S19, half the diagonal length of the effective pixel area on the imaging surface S19 ImgH, and half of the maximum field of view angle semi-FOV.

f1(mm) 4.15 f7(mm) 12.65 f2(mm) 10.07 f8(mm) 27.35 f3(mm) -3.94 f(mm) 6.96 f4(mm) -197.99 TTL(mm) 6.30 f5(mm) 49.14 ImgH(mm) 2.78 f6(mm) -4.42 semi-FOV(°) 21.9

Table 27

FIG18A shows an on-axis chromatic aberration curve of the optical imaging lens of Example 9, which indicates the deviation of light of different wavelengths from the focal point after passing through the lens. FIG18B shows an astigmatism curve of the optical imaging lens of Example 9, which indicates the meridional image curvature and the sagittal image curvature. FIG18C shows a distortion curve of the optical imaging lens of Example 9, which indicates the distortion magnitude value under different fields of view. FIG18D shows a magnification chromatic aberration curve of the optical imaging lens of Example 9, which indicates the deviation of different image heights on the imaging plane after light passes through the lens. It can be seen from FIG18A to FIG18D that the optical imaging lens provided in Example 9 can achieve good imaging quality.

Example 10

The optical imaging lens according to Embodiment 10 of the present application is described below with reference to Figures 19 to 20D. Figure 19 shows a schematic structural diagram of the optical imaging lens according to Embodiment 10 of the present application.

As shown in FIG. 19 , the optical imaging lens according to an exemplary embodiment of the present application includes, in order from the object side to the image side along the optical axis, 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 filter E9 and an imaging surface S19.

The first lens E1 has positive focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has positive focal power, and its object side surface S3 is convex, and its image side surface S4 is convex. The third lens E3 has negative focal power, and its object side surface S5 is concave, and its image side surface S6 is concave. The fourth lens E4 has positive focal power, and its object side surface S7 is concave, and its image side surface S8 is convex. The fifth lens E5 has negative focal power, and its object side surface S9 is concave, and its image side surface S10 is convex. The sixth lens E6 has negative focal power, and its object side surface S11 is concave, and its image side surface S12 is concave. The seventh lens E7 has positive focal power, and its object side surface S13 is convex, and its image side surface S14 is convex. The eighth lens E8 has positive focal power, and its object side surface S15 is convex, and its image side surface S16 is convex. The filter E9 has an object side surface S17 and an image side surface S18. Light from an object passes through the surfaces S1 to S18 in sequence and is finally imaged on the imaging surface S19.

The optical imaging lens in this embodiment may also be provided with a diaphragm for limiting the light beam to improve the imaging quality.

Table 28 shows the surface type, radius of curvature, thickness, material and conic coefficient of each lens of the optical imaging lens of Example 10, wherein the units of the radius of curvature and thickness are both millimeters (mm).

Table 28

It can be seen from Table 28 that in Example 10, the object side surface and the image side surface of any lens from the first lens E1 to the eighth lens E8 are aspherical surfaces. Table 29 shows the high-order coefficients of each aspherical mirror surface that can be used in Example 10, wherein the surface shape of each aspherical surface can be defined by the formula (1) given in the above Example 1.

Table 29

Table 30 shows the effective focal lengths f1 to f8 of each lens in Example 10, the total effective focal length f of the optical imaging lens, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S19, half the diagonal length of the effective pixel area on the imaging surface S19 ImgH, and half of the maximum field of view angle semi-FOV.

f1(mm) 4.15 f7(mm) 12.29 f2(mm) 10.08 f8(mm) 35.05 f3(mm) -3.93 f(mm) 7.01 f4(mm) 47.85 TTL(mm) 6.34 f5(mm) -216.96 ImgH(mm) 2.77 f6(mm) -4.40 semi-FOV(°) 21.6

Table 30

FIG20A shows an on-axis chromatic aberration curve of the optical imaging lens of Example 10, which indicates the deviation of light of different wavelengths from the focal point after passing through the lens. FIG20B shows an astigmatism curve of the optical imaging lens of Example 10, which indicates the meridional image curvature and the sagittal image curvature. FIG20C shows a distortion curve of the optical imaging lens of Example 10, which indicates the distortion magnitude value under different fields of view. FIG20D shows a magnification chromatic aberration curve of the optical imaging lens of Example 10, which indicates the deviation of different image heights on the imaging plane after light passes through the lens. It can be seen from FIG20A to FIG20D that the optical imaging lens provided in Example 10 can achieve good imaging quality.

Embodiment 11

The optical imaging lens according to Embodiment 11 of the present application is described below with reference to Figures 21 to 22D. Figure 21 shows a schematic structural diagram of the optical imaging lens according to Embodiment 11 of the present application.

As shown in FIG. 21 , the optical imaging lens according to an exemplary embodiment of the present application includes, in order from the object side to the image side along the optical axis, 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 filter E9 and an imaging surface S19.

The first lens E1 has positive focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has positive focal power, and its object side surface S3 is convex, and its image side surface S4 is convex. The third lens E3 has negative focal power, and its object side surface S5 is concave, and its image side surface S6 is concave. The fourth lens E4 has positive focal power, and its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has negative focal power, and its object side surface S9 is convex, and its image side surface S10 is concave. The sixth lens E6 has negative focal power, and its object side surface S11 is concave, and its image side surface S12 is concave. The seventh lens E7 has positive focal power, and its object side surface S13 is convex, and its image side surface S14 is concave. The eighth lens E8 has positive focal power, and its object side surface S15 is convex, and its image side surface S16 is convex. The filter E9 has an object side surface S17 and an image side surface S18. Light from an object passes through the surfaces S1 to S18 in sequence and is finally imaged on the imaging surface S19.

The optical imaging lens in this embodiment may also be provided with a diaphragm for limiting the light beam to improve the imaging quality.

Table 31 shows the surface type, curvature radius, thickness, material and cone coefficient of each lens of the optical imaging lens of Example 11, where the units of the curvature radius and thickness are both millimeters (mm).

Table 31

It can be seen from Table 31 that in Example 11, the object side surface and the image side surface of any lens from the first lens E1 to the eighth lens E8 are aspherical surfaces. Table 32 shows the high-order coefficients of each aspherical mirror surface that can be used in Example 11, wherein the surface shape of each aspherical surface can be defined by the formula (1) given in the above Example 1.

Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -4.3030E-03 -3.9700E-04 -6.6500E-03 1.3759E-02 -1.7870E-02 1.2881E-02 -5.3800E-03 1.1060E-03 -7.8000E-05 S2 2.3048E-02 -1.1520E-02 7.1458E-02 -1.2244E-01 1.2978E-01 -1.0307E-01 5.3177E-02 -1.4950E-02 1.7310E-03 S3 2.1637E-02 -1.3754E-02 1.1677E-01 -2.1214E-01 2.3054E-01 -1.7191E-01 8.1945E-02 -2.1520E-02 2.3250E-03 S4 1.3907E-02 1.0931E-02 2.2867E-02 -8.9820E-02 1.3515E-01 -1.1785E-01 6.2210E-02 -1.8580E-02 2.3930E-03 S5 -1.3258E-02 1.3250E-01 -4.2495E-01 1.4447E+00 -3.4352E+00 5.1716E+00 -4.6908E+00 2.3386E+00 -4.9213E-01 S6 -2.0746E-02 2.4573E-01 -1.2913E+00 6.3720E+00 -2.0321E+01 4.1059E+01 -5.0470E+01 3.4424E+01 -9.9661E+00 S7 -1.3837E-01 3.0054E-02 -1.0542E-01 2.7500E-01 -3.8611E-01 4.3063E-01 -3.2273E-01 1.4693E-01 -3.1050E-02 S8 -1.2297E-01 8.8240E-02 -5.2360E-01 1.6793E+00 -2.9705E+00 3.2494E+00 -2.1653E+00 8.0689E-01 -1.2864E-01 S9 2.6564E-02 -1.8275E-01 4.8562E-01 -8.5097E-01 1.0726E+00 -9.1332E-01 4.8375E-01 -1.4234E-01 1.7702E-02 S10 4.1340E-02 -1.3586E-01 2.3115E-01 -2.0603E-01 1.0620E-01 -3.4110E-02 7.9930E-03 -1.5800E-03 1.8200E-04 S11 -1.0059E-01 -1.0461E-01 3.0841E-01 -4.8945E-01 5.0656E-01 -3.2672E-01 1.2508E-01 -2.5910E-02 2.2370E-03 S12 -2.4060E-01 2.6376E-01 -2.3811E-01 1.3286E-01 -4.4920E-02 9.0690E-03 -1.0300E-03 5.7300E-05 -9.9000E-07 S13 -2.1543E-01 3.3631E-01 -3.4298E-01 2.0311E-01 -7.0690E-02 1.4173E-02 -1.4300E-03 3.1400E-05 3.6200E-06 S14 -8.1226E-02 8.9559E-02 -7.2950E-02 -1.8000E-04 2.6932E-02 -1.5300E-02 4.0470E-03 -5.4000E-04 2.9500E-05 S15 -4.7631E-02 1.3783E-01 -1.4880E-01 7.8929E-02 -2.6990E-02 6.4950E-03 -1.0700E-03 1.0600E-04 -4.7000E-06 S16 -1.6573E-01 2.4766E-01 -2.1197E-01 1.1568E-01 -4.1910E-02 9.8630E-03 -1.4300E-03 1.1500E-04 -3.8000E-06

Table 32

Table 33 shows the effective focal lengths f1 to f8 of each lens in Example 11, the total effective focal length f of the optical imaging lens, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S19, half the diagonal length of the effective pixel area on the imaging surface S19 ImgH, and half of the maximum field of view angle semi-FOV.

f1(mm) 4.15 f7(mm) 83.79 f2(mm) 10.08 f8(mm) 16.95 f3(mm) -3.92 f(mm) 7.05 f4(mm) 21.01 TTL(mm) 6.33 f5(mm) -31.72 ImgH(mm) 2.76 f6(mm) -4.69 semi-FOV(°) 21.4

Table 33

FIG22A shows an axial chromatic aberration curve of the optical imaging lens of Example 11, which indicates the deviation of light rays of different wavelengths from the focal point after passing through the lens. FIG22B shows an astigmatism curve of the optical imaging lens of Example 11, which indicates the meridional image curvature and the sagittal image curvature. FIG22C shows a distortion curve of the optical imaging lens of Example 11, which indicates the distortion magnitude values under different fields of view. FIG22D shows a magnification chromatic aberration curve of the optical imaging lens of Example 11, which indicates the deviation of different image heights on the imaging plane after light rays pass through the lens. It can be seen from FIG22A to FIG22D that the optical imaging lens provided in Example 11 can achieve good imaging quality.

Example 12

The optical imaging lens according to Embodiment 12 of the present application is described below with reference to Figures 23 to 24D. Figure 23 shows a schematic structural diagram of the optical imaging lens according to Embodiment 12 of the present application.

As shown in FIG. 23 , the optical imaging lens according to an exemplary embodiment of the present application includes, in order from the object side to the image side along the optical axis, 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 filter E9 and an imaging surface S19.

The first lens E1 has positive focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has positive focal power, and its object side surface S3 is convex, and its image side surface S4 is convex. The third lens E3 has negative focal power, and its object side surface S5 is concave, and its image side surface S6 is concave. The fourth lens E4 has positive focal power, and its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has positive focal power, and its object side surface S9 is convex, and its image side surface S10 is concave. The sixth lens E6 has negative focal power, and its object side surface S11 is convex, and its image side surface S12 is concave. The seventh lens E7 has positive focal power, and its object side surface S13 is convex, and its image side surface S14 is concave. The eighth lens E8 has positive focal power, and its object side surface S15 is concave, and its image side surface S16 is convex. The filter E9 has an object side surface S17 and an image side surface S18. Light from an object passes through the surfaces S1 to S18 in sequence and is finally imaged on the imaging surface S19.

The optical imaging lens in this embodiment may also be provided with a diaphragm for limiting the light beam to improve the imaging quality.

Table 34 shows the surface type, curvature radius, thickness, material and cone coefficient of each lens of the optical imaging lens of Example 12, where the units of the curvature radius and thickness are both millimeters (mm).

Table 34

It can be seen from Table 34 that in Example 12, the object side surface and the image side surface of any lens from the first lens E1 to the eighth lens E8 are aspherical surfaces. Table 35 shows the high-order coefficients of each aspherical mirror surface that can be used in Example 12, wherein the surface shape of each aspherical surface can be defined by the formula (1) given in the above Example 1.

Table 35

Table 36 shows the effective focal lengths f1 to f8 of each lens in Example 12, the total effective focal length f of the optical imaging lens, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S19, half the diagonal length of the effective pixel area on the imaging surface S19 ImgH, and half of the maximum field of view angle semi-FOV.

f1(mm) 4.15 f7(mm) 13.27 f2(mm) 10.08 f8(mm) 24.09 f3(mm) -3.93 f(mm) 6.83 f4(mm) 66.95 TTL(mm) 6.34 f5(mm) 5747.12 ImgH(mm) 2.70 f6(mm) -4.62 semi-FOV(°) 21.8

Table 36

FIG24A shows an on-axis chromatic aberration curve of the optical imaging lens of Example 12, which indicates the deviation of light of different wavelengths from the focal point after passing through the lens. FIG24B shows an astigmatism curve of the optical imaging lens of Example 12, which indicates the meridional image curvature and the sagittal image curvature. FIG24C shows a distortion curve of the optical imaging lens of Example 12, which indicates the distortion magnitude value under different fields of view. FIG24D shows a magnification chromatic aberration curve of the optical imaging lens of Example 12, which indicates the deviation of different image heights on the imaging plane after light passes through the lens. It can be seen from FIG24A to FIG24D that the optical imaging lens provided in Example 12 can achieve good imaging quality.

In summary, Examples 1 to 12 respectively satisfy the relationships shown in Table 37.

Table 37

The present application also provides an imaging device, whose electronic photosensitive element can be a photosensitive coupled device (CCD) or a complementary metal oxide semiconductor element (CMOS). The imaging device can be an independent imaging device such as a digital camera, or an imaging module integrated in a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens described above.

The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

Claims (11)

1. An optical imaging lens, comprising, in order from the object side to the image side along the 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, characterized in that: The first lens has positive refractive power, its object side surface is convex, and its image side surface is concave; The second lens has positive refractive power, and its object side surface is convex, and its image side surface is convex; The third lens has negative optical power, and its object side surface is concave, and its image side surface is concave; The sixth lens has negative optical power, and its image side surface is concave; The object side surface of the seventh lens is a convex surface; The number of lenses having optical power in the optical imaging lens is eight; The distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis and the total effective focal length f of the optical imaging lens satisfy 0.87≤TTL/f＜1.0; and The total effective focal length f of the optical imaging lens and the combined focal length f12 of the first lens and the second lens satisfy 2＜f/f12＜2.5. 2. The optical imaging lens according to claim 1, wherein an effective focal length f3 of the third lens element and an effective focal length f6 of the sixth lens element satisfy 0.7＜f3/f6＜1.2. 3. The optical imaging lens according to claim 1, characterized in that a total effective focal length f of the optical imaging lens, a curvature radius R1 of the object-side surface of the first lens, a curvature radius R2 of the image-side surface of the first lens, a curvature radius R3 of the object-side surface of the second lens, and a curvature radius R4 of the image-side surface of the second lens satisfy 1.5＜f/(R1+R2+R3+R4)＜2.0. 4. The optical imaging lens according to claim 1, wherein a curvature radius R5 of the object-side surface of the third lens element, a curvature radius R6 of the image-side surface of the third lens element, and a total effective focal length f of the optical imaging lens satisfy 0.9＜|R5+R6|/f＜1.4. 5 . The optical imaging lens according to claim 1 , wherein a curvature radius R12 of the image-side surface of the sixth lens element and a curvature radius R13 of the object-side surface of the seventh lens element satisfy 0＜R12/R13＜0.5. 6. The optical imaging lens according to claim 1, characterized in that a center thickness CT1 of the first lens on the optical axis, a center thickness CT4 of the fourth lens on the optical axis, a center thickness CT5 of the fifth lens on the optical axis, and a distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis satisfy 1.8＜(CT1+CT4+CT5)×10/TTL＜2.3. 7. The optical imaging lens according to claim 1, characterized in that half of the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens ImgH, the spacing distance T34 between the third lens and the fourth lens on the optical axis, and the spacing distance T56 between the fifth lens and the sixth lens on the optical axis satisfy 1.6＜ImgH/(T34+T56)＜2.1. 8. The optical imaging lens according to claim 1, wherein a center thickness CT7 of the seventh lens on the optical axis, a spacing T78 between the seventh lens and the eighth lens on the optical axis, and a center thickness CT8 of the eighth lens on the optical axis satisfy 0.6＜CT7/(T78+CT8)＜1.6. 9 . The optical imaging lens according to claim 1 , wherein a maximum effective half-aperture DT11 of the object-side surface of the first lens and a maximum effective half-aperture DT31 of the object-side surface of the third lens satisfy 1.2＜DT11/DT31＜1.7. 10 . The optical imaging lens according to claim 1 , wherein a maximum effective semi-aperture DT82 of the image-side surface of the eighth lens element and a maximum effective semi-aperture DT32 of the image-side surface of the third lens element satisfy 2.3＜DT82/DT32＜3.3. 11. The optical imaging lens according to any one of claims 1 to 10, wherein half of the maximum field of view (semi-FOV) of the optical imaging lens satisfies 20°＜semi-FOV＜25°.