CN107621682B - Optical imaging lens - Google Patents

Optical imaging lens Download PDF

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CN107621682B
CN107621682B CN201711007397.7A CN201711007397A CN107621682B CN 107621682 B CN107621682 B CN 107621682B CN 201711007397 A CN201711007397 A CN 201711007397A CN 107621682 B CN107621682 B CN 107621682B
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lens
optical imaging
focal length
effective focal
imaging lens
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CN107621682A (en
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张凯元
李明
徐标
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Zhejiang Sunny Optics Co Ltd
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Zhejiang Sunny Optics Co Ltd
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Priority to PCT/CN2018/092868 priority patent/WO2019080528A1/en
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Abstract

The application discloses an optical imaging lens, which comprises in order from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens having optical power. The first lens has negative 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 image side surface of the third lens is a concave surface; the object side surface of the seventh lens is a concave surface; wherein the total effective focal length f of the optical imaging lens, the effective focal length f4 of the fourth lens and the effective focal length f5 of the fifth lens satisfy | f/f4| + | f/f5| < 1.

Description

Optical imaging lens
Technical Field
The present application relates to an optical imaging lens, and more particularly, to an optical imaging lens including seven lenses.
Background
In recent years, with the development of chip technologies such as CCD (Charge-Coupled Device) or CMOS (Complementary Metal-Oxide Semiconductor), the pixel size of the chip is becoming smaller, the requirement for the imaging quality of the optical imaging lens used in cooperation therewith is becoming higher, and the imaging lens used in cooperation therewith is required to have both high pixel and miniaturization characteristics.
In addition, with the popularization of portable electronic devices such as mobile phones and digital cameras, portable electronic products are more and more widely applied, and corresponding requirements are also put forward on the aspects of large aperture, high resolution and the like of optical imaging lenses used in cooperation.
Disclosure of Invention
The present application provides an optical imaging lens, such as a large aperture imaging lens, that may be applicable to portable electronic products and that may address at least one of the above-mentioned shortcomings in the prior art.
In one aspect, the present application discloses an optical imaging lens, in order from an object side to an image side along an optical axis, comprising: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens having optical power. The first lens can have negative focal power, and the object side surface of the first lens can be a convex surface, and the image side surface of the first lens can be a concave surface; the image side surface of the third lens can be a concave surface; the object side surface of the seventh lens element may be concave. The total effective focal length f of the optical imaging lens, the effective focal length f4 of the fourth lens and the effective focal length f5 of the fifth lens can satisfy | f/f4| + | f/f5| < 1.
In one embodiment, the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens may satisfy f/EPD ≦ 1.60.
In one embodiment, the total effective focal length f of the optical imaging lens and the effective focal length f1 of the first lens can satisfy-0.5 < f/f1 < 0.
In one embodiment, the effective focal length f2 of the second lens and the radius of curvature R3 of the object side of the second lens can satisfy 1.5 < f2/R3 < 2.5.
In one embodiment, the effective focal length f6 of the sixth lens and the radius of curvature R12 of the image side surface of the sixth lens can satisfy-2 < f6/R12 < -1.
In one embodiment, the effective focal length f6 of the sixth lens and the effective focal length f7 of the seventh lens can satisfy-1.5 < f6/f7 < -1.
In one embodiment, the central thickness CT4 of the fourth lens element on the optical axis and the central thickness CT5 of the fifth lens element on the optical axis satisfy 0.5 < CT4/CT5 < 2.0.
In one embodiment, the central thickness CT1 of the first lens element on the optical axis and the central thickness CT7 of the seventh lens element on the optical axis satisfy 1.00 ≦ CT1/CT7 < 1.50.
In one embodiment, the total optical length TTL of the optical imaging lens and the half of the diagonal length ImgH of the effective pixel area on the imaging surface of the optical imaging lens can satisfy TTL/ImgH ≦ 1.5.
In one embodiment, the radius of curvature R13 of the object-side surface of the seventh lens and the radius of curvature R14 of the image-side surface of the seventh lens satisfy | R13/R14| ≦ 2.
In one embodiment, the radius of curvature R5 of the object-side surface of the third lens and the radius of curvature R6 of the image-side surface of the third lens can satisfy 1.5 < (R5+ R6)/(R5-R6) ≦ 80.
In another aspect, the present application discloses an imaging lens, in order from an object side to an image side along an optical axis, comprising: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens having optical power. The object side surface of the first lens can be a convex surface, and the image side surface of the first lens can be a concave surface; the image side surface of the third lens can be a concave surface; the object side surface of the seventh lens element may be concave. Wherein, the central thickness CT1 of the first lens element on the optical axis and the central thickness CT7 of the seventh lens element on the optical axis satisfy 1.00 ≤ CT1/CT7 < 1.50.
The optical imaging lens adopts a plurality of lenses (for example, seven lenses), and has at least one beneficial effect of ultra-thinness, miniaturization, large aperture, low sensitivity, good processability, high pixel, high imaging quality and the like by reasonably distributing the optical power, the surface shape, the central thickness of each lens, the on-axis distance between each lens and the like.
Drawings
Other features, objects, and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments when taken in conjunction with the accompanying drawings. In the drawings:
fig. 1 shows a schematic structural view of an optical imaging lens according to embodiment 1 of the present application;
fig. 2A to 2D show an on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 1;
fig. 3 is a schematic structural view showing an optical imaging lens according to embodiment 2 of the present application;
fig. 4A to 4D show an on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 2;
fig. 5 is a schematic structural view showing an optical imaging lens according to embodiment 3 of the present application;
fig. 6A to 6D show an on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 3;
fig. 7 is a schematic structural view showing an optical imaging lens according to embodiment 4 of the present application;
fig. 8A to 8D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 4;
fig. 9 is a schematic structural view showing an optical imaging lens according to embodiment 5 of the present application;
fig. 10A to 10D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 5;
fig. 11 is a schematic structural view showing an optical imaging lens according to embodiment 6 of the present application;
fig. 12A to 12D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 6;
fig. 13 is a schematic structural view showing an optical imaging lens according to embodiment 7 of the present application;
fig. 14A to 14D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of an optical imaging lens of embodiment 7;
fig. 15 is a schematic structural view showing an optical imaging lens according to embodiment 8 of the present application;
fig. 16A to 16D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of an optical imaging lens of embodiment 8;
fig. 17 is a schematic structural view showing an optical imaging lens according to embodiment 9 of the present application;
fig. 18A to 18D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of an optical imaging lens of embodiment 9.
Detailed Description
For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the present application and does not limit the scope of the present application in any way. Like reference numerals refer to like elements throughout the specification. The expression "and/or" includes any and all combinations of one or more of the associated listed items.
It should be noted that in this specification, the expressions first, second, third, etc. are used only to distinguish one feature from another, and do not represent any limitation on the features. Thus, the first lens discussed below may also be referred to as the second lens or the third lens without departing from the teachings of the present application.
In the drawings, the thickness, size, and shape of the lens have been slightly exaggerated for convenience of explanation. In particular, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shape of the spherical surface or the aspherical surface is not limited to the shape of the spherical surface or the aspherical surface shown in the drawings. The figures are purely diagrammatic and not drawn to scale.
Herein, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object is called the object side surface, and the surface of each lens closest to the image plane is called the image side surface.
It will be further understood that the terms "comprises," "comprising," "has," "having," "includes" and/or "including," when used in this specification, specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof. Moreover, when a statement such as "at least one of" appears after a list of listed features, the entirety of the listed features is modified rather than modifying individual elements in the list. Furthermore, when describing embodiments of the present application, the use of "may" mean "one or more embodiments of the present application. Also, the term "exemplary" is intended to refer to an example or illustration.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
The features, principles, and other aspects of the present application are described in detail below.
The optical imaging lens according to an exemplary embodiment of the present application may include, for example, seven lenses having optical powers, i.e., a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The seven lenses are arranged in sequence from the object side to the image side along the optical axis.
In an exemplary embodiment, the first lens may have a negative optical power, and the object side surface thereof may be convex and the image side surface thereof may be concave; the second lens has positive focal power or negative focal power; the third lens has positive focal power or negative focal power, and the image side surface of the third lens can be a concave surface; the fourth lens has positive focal power or negative focal power; the fifth lens has positive focal power or negative focal power; the sixth lens has positive focal power or negative focal power; the seventh lens has positive power or negative power, and the object side surface of the seventh lens is a concave surface.
In an exemplary embodiment, the second lens may have a positive optical power, and the object-side surface thereof may be convex.
In an exemplary embodiment, the object side surface of the third lens may be convex.
In an exemplary embodiment, the sixth lens may have positive optical power, and the image-side surface thereof may be convex.
In an exemplary embodiment, the seventh lens may have a negative optical power, and the image-side surface thereof may be concave.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression f/EPD ≦ 1.60, where f is the total effective focal length of the optical imaging lens and EPD is the entrance pupil diameter of the optical imaging lens. More specifically, f and EPD further satisfy 1.46 ≦ f/EPD ≦ 1.60. The smaller the f-number Fno of the optical imaging lens (i.e., the total effective focal length f of the lens/the entrance pupil diameter EPD of the lens), the larger the clear aperture of the lens, the more the amount of light entering in the same unit time. The reduction of f-number Fno can promote image plane luminance effectively for the camera lens can satisfy the shooting demand when not enough light such as cloudy day, dusk better, has the large aperture advantage. The lens is configured to satisfy the conditional expression f/EPD less than or equal to 1.60, and the illumination of an imaging surface can be enhanced in the process of increasing the light transmission quantity, so that the imaging effect of the lens in a dark environment is improved.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression | f/f4| + | f/f5| < 1, where f is the total effective focal length of the optical imaging lens, f4 is the effective focal length of the fourth lens, and f5 is the effective focal length of the fifth lens. More specifically, f4, and f5 can further satisfy 0 < | f/f4| + | f/f5| < 0.50, e.g., 0.02 ≦ f/f4| + | f/f5 ≦ 0.44. The focal power of each lens is reasonably configured, and the imaging effect of high pixels is favorably realized.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression-0.5 < f/f1 < 0, where f is the total effective focal length of the optical imaging lens and f1 is the effective focal length of the first lens. More specifically, f and f1 further satisfy-0.25 < f/f1 < -0.10, for example, -0.19. ltoreq. f/f 1. ltoreq.0.16. By reasonably controlling the negative focal power of the first lens, the negative third-order spherical aberration and the positive fifth-order spherical aberration contributed by the first lens are reasonably controlled, so that the negative third-order spherical aberration and the positive fifth-order spherical aberration contributed by the first lens can be mutually offset with the positive third-order spherical aberration and the negative fifth-order spherical aberration generated by each positive lens (namely, each lens with the positive focal power between the first lens and the image side) behind the first lens, and the on-axis field of view has good imaging quality.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression-1.5 < f6/f7 < -1, where f6 is an effective focal length of the sixth lens and f7 is an effective focal length of the seventh lens. More specifically, f6 and f7 may further satisfy-1.5 < f6/f7 < -1.3, for example, -1.44. ltoreq. f6/f 7. ltoreq.1.32. Through reasonable control of the ratio of focal power of the sixth lens and the seventh lens, the residual spherical aberration generated after the sixth lens and the seventh lens are balanced can be used for balancing the spherical aberration generated by the front five lenses (namely the first lens to the fifth lens), so that the fine adjustment and control of the spherical aberration of the system are realized, and the accurate control of the on-axis field aberration is improved.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 1.00 ≦ CT1/CT7 < 1.50, where CT1 is a central thickness of the first lens on the optical axis, and CT7 is a central thickness of the seventh lens on the optical axis. More specifically, CT1 and CT7 can further satisfy 1.00. ltoreq. CT1/CT7 < 1.30, for example, 1.00. ltoreq. CT1/CT 7. ltoreq.1.27. By reasonably controlling the ratio of the central thicknesses of the first lens and the seventh lens, the total optical length TTL of the lens can be controlled within a reasonable range while the good machinability of the lens is ensured, and the large burden on the longitudinal size of the system is avoided.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 1.5 < f2/R3 < 2.5, where f2 is an effective focal length of the second lens and R3 is a radius of curvature of an object side surface of the second lens. More specifically, f2 and R3 may further satisfy 1.7 < f2/R3 < 2.5, for example, 1.73. ltoreq. f 2/R3. ltoreq.2.46. By properly controlling the ratio of f2 to R3, the object side surface and the image side surface of the second lens can both bear reasonable optical power, thereby ensuring that the second lens meets the optical performance requirements of the system and has the lowest sensitivity possible.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression-2 < f6/R12 < -1, where f6 is an effective focal length of the sixth lens, and R12 is a radius of curvature of an image-side surface of the sixth lens. More specifically, f6 and R12 may further satisfy-1.90 < f6/R12 < -1.50, for example, -1.83. ltoreq. f 6/R12. ltoreq.1.56. By reasonably controlling the ratio of f6/R12, the astigmatism contribution amount of the image side surface of the sixth lens is in a reasonable range, and the astigmatism contribution amount of the image side surface of the sixth lens can better balance the accumulated astigmatism amounts of the front lenses (namely, the lenses between the object side and the sixth lens), so that the optical imaging system has good imaging quality in both the meridian plane and the sagittal plane.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.5 < CT4/CT5 < 2.0, where CT4 is a central thickness of the fourth lens element on the optical axis, and CT5 is a central thickness of the fifth lens element on the optical axis. More specifically, CT4 and CT5 may further satisfy 0.9 < CT4/CT5 < 1.7, for example, 0.98. ltoreq. CT4/CT 5. ltoreq.1.59. By reasonably controlling the ratio of the central thicknesses of the fourth lens and the fifth lens, the distortion contribution amounts of the fourth lens and the fifth lens can be controlled within a reasonable range, so that the final distortion amount of each field of view is controlled below 3%, and the requirement of software debugging in the later period is avoided.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression TTL/ImgH ≦ 1.5, where TTL is the total optical length of the optical imaging lens (i.e., the distance on the optical axis from the center of the object side surface of the first lens to the imaging surface of the optical imaging lens), and ImgH is half the diagonal length of the effective pixel area on the imaging surface. More specifically, TTL and ImgH can further satisfy 1.43 ≦ TTL/ImgH ≦ 1.46. By reasonably controlling the ratio of TTL to ImgH, the ultra-thinning and high-pixel simultaneous realization of the optical imaging lens are facilitated.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 1.5 < (R5+ R6)/(R5-R6) ≦ 80, where R5 is a radius of curvature of an object-side surface of the third lens, and R6 is a radius of curvature of an image-side surface of the third lens. More specifically, R5 and R6 may further satisfy 1.68 ≦ (R5+ R6)/(R5-R6) ≦ 79.1. By reasonably controlling the curvature radius of the object side surface and the image side surface of the third lens, the coma contribution amount of the third lens can be controlled within a reasonable range, so that the image quality of an on-axis view field and an off-axis view field cannot be obviously degraded due to the coma contribution.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression | R13/R14| ≦ 2, where R13 is a radius of curvature of an object-side surface of the seventh lens, and R14 is a radius of curvature of an image-side surface of the seventh lens. More specifically, R13 and R14 can further satisfy 1.3 < | R13/R14| ≦ 2, e.g., 1.37 ≦ | R13/R14| ≦ 1.91. The ratio of the curvature radii of the object side surface and the image side surface of the seventh lens is reasonably controlled, and the accurate control of the field aberration on the lifting axis is facilitated.
In an exemplary embodiment, the optical imaging lens may further include at least one stop to further improve the imaging quality of the lens. For example, a diaphragm may be disposed between the object side and the first lens.
Optionally, the optical imaging lens may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element on the imaging surface.
The optical imaging lens according to the above-described embodiment of the present application may employ a plurality of lenses, for example, seven lenses as described above. By reasonably distributing the focal power, the surface type, the central thickness of each lens, the on-axis distance between each lens and the like, the volume of the lens can be effectively reduced, the sensitivity of the lens can be reduced, and the machinability of the lens can be improved, so that the optical imaging lens is more beneficial to production and processing and can be suitable for portable electronic products. Meanwhile, the optical imaging lens with the configuration has the beneficial effects of ultrathin thickness, large aperture, high pixel, high imaging quality and the like.
In the embodiment of the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface. The aspheric lens is characterized in that: the curvature varies continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has better curvature radius characteristics, and has advantages of improving distortion aberration and improving astigmatic aberration. After the aspheric lens is adopted, the aberration generated during imaging can be eliminated as much as possible, thereby improving the imaging quality.
However, it will be appreciated by those skilled in the art that the number of lenses constituting an optical imaging lens may be varied to achieve the various results and advantages described in the present specification without departing from the claimed subject matter. For example, although seven lenses are exemplified in the embodiment, the optical imaging lens is not limited to include seven lenses. The optical imaging lens may also include other numbers of lenses, if desired.
Specific examples of an optical imaging lens applicable to the above-described embodiments are further described below with reference to the drawings.
Example 1
An optical imaging lens according to embodiment 1 of the present application is described below with reference to fig. 1 to 2D. Fig. 1 shows a schematic structural diagram of an optical imaging lens according to embodiment 1 of the present application.
As shown in fig. 1, an optical imaging lens according to an exemplary embodiment of the present application includes, in order from an object side to an image side along an optical axis: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an image forming surface S17.
The first lens element E1 has negative power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has negative power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a concave object-side surface S13 and a concave image-side surface S14. Filter E8 has an object side S15 and an image side S16. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
Table 1 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens of example 1, wherein the unit of the radius of curvature and the thickness are both millimeters (mm).
Figure BDA0001444740220000091
Figure BDA0001444740220000101
TABLE 1
As can be seen from table 1, the object-side surface and the image-side surface of any one of the first lens element E1 through the seventh lens element E7 are aspheric. In the present embodiment, the profile x of each aspheric lens can be defined using, but not limited to, the following aspheric formula:
Figure BDA0001444740220000102
wherein x is the rise of the distance from the aspheric surface vertex to the aspheric surface vertex when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c being 1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1 above); k is the conic coefficient (given in table 1); ai is the correction coefficient of the i-th order of the aspherical surface. Table 2 below shows the high-order coefficient A of each of the aspherical mirror surfaces S1 to S14 used in example 14、A6、A8、A10、A12、A14、A16、A18And A20。
Figure BDA0001444740220000103
Figure BDA0001444740220000111
TABLE 2
In embodiment 1, the total effective focal length f of the optical imaging lens is 4.05 mm; the effective focal length f1 of the first lens E1 is-22.47 mm; the effective focal length f2 of the second lens E2 is 2.77 mm; the effective focal length f3 of the third lens E3 is-8.59 mm; the effective focal length f4 of the fourth lens E4 is-293.01 mm; the effective focal length f5 of the fifth lens E5 is-1801.76 mm; the effective focal length f6 of the sixth lens E6 is 2.85 mm; the effective focal length f7 of the seventh lens E7 is-2.12 mm. The total optical length of the imaging lens (i.e., the distance on the optical axis from the center of the object-side surface S1 of the first lens E1 to the imaging surface S17) TTL is 4.99 mm. The ImgH of the half diagonal length of the effective pixel area on the imaging plane S17 is 3.43 mm.
The optical imaging lens in embodiment 1 satisfies:
f/EPD is 1.59, wherein f is the total effective focal length of the optical imaging lens, and EPD is the entrance pupil diameter of the optical imaging lens;
i f/f4| + | f/f5| -0.02, wherein f is the total effective focal length of the optical imaging lens, f4 is the effective focal length of the fourth lens E4, and f5 is the effective focal length of the fifth lens E5;
f/f1 is-0.18, wherein f is the total effective focal length of the optical imaging lens, and f1 is the effective focal length of the first lens E1;
f6/f7 is-1.35, wherein f6 is the effective focal length of the sixth lens E6, and f7 is the effective focal length of the seventh lens E7;
CT1/CT7 is 1.13, where CT1 is the central thickness of the first lens E1 on the optical axis, and CT7 is the central thickness of the seventh lens E7 on the optical axis;
f2/R3 is 1.88, where f2 is the effective focal length of the second lens E2, and R3 is the radius of curvature of the object side S3 of the second lens E2;
f6/R12 is-1.63, where f6 is the effective focal length of the sixth lens E6, and R12 is the radius of curvature of the image side S12 of the sixth lens E6;
CT4/CT5 is 1.40, where CT4 is the central thickness of the fourth lens E4 on the optical axis, and CT5 is the central thickness of the fifth lens E5 on the optical axis;
TTL/ImgH is 1.45, where TTL is the total optical length of the optical imaging lens, and ImgH is half the diagonal length of the effective pixel area on the imaging plane S17;
(R5+ R6)/(R5-R6) ═ 3.44, where R5 is the radius of curvature of the object side S5 of the third lens E3 and R6 is the radius of curvature of the image side S6 of the third lens E3;
l R13/R14| ═ 1.76, where R13 is the radius of curvature of object-side surface S13 of seventh lens E7, and R14 is the radius of curvature of image-side surface S14 of seventh lens E7.
In addition, fig. 2A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 1, which represents the deviation of the convergent focus of light rays of different wavelengths after passing through the lens. Fig. 2B shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the optical imaging lens of embodiment 1. Fig. 2C shows a distortion curve of the optical imaging lens of embodiment 1, which represents the distortion magnitude values in the case of different angles of view. Fig. 2D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 1, which represents a deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 2A to 2D, the optical imaging lens according to embodiment 1 can achieve good imaging quality.
Example 2
An optical imaging lens according to embodiment 2 of the present application is described below with reference to fig. 3 to 4D. In this embodiment and the following embodiments, descriptions of parts similar to those of embodiment 1 will be omitted for the sake of brevity. Fig. 3 shows a schematic structural diagram of an optical imaging lens according to embodiment 2 of the present application.
As shown in fig. 3, an optical imaging lens according to an exemplary embodiment of the present application, in order from an object side to an image side along an optical axis, includes: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an image forming surface S17.
The first lens element E1 has negative power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a convex image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has negative power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has positive power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a concave object-side surface S13 and a concave image-side surface S14. Filter E8 has an object side S15 and an image side S16. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
Table 3 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens of example 2, wherein the unit of the radius of curvature and the thickness are both millimeters (mm).
Figure BDA0001444740220000131
TABLE 3
As is clear from table 3, in example 2, both the object-side surface and the image-side surface of any one of the first lens element E1 through the seventh lens element E7 are aspheric. Table 4 shows high-order term coefficients that can be used for each aspherical mirror surface in example 2, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
Figure BDA0001444740220000132
Figure BDA0001444740220000141
TABLE 4
In embodiment 2, the total effective focal length f of the optical imaging lens is 4.13 mm; the effective focal length f1 of the first lens E1 is-23.95 mm; the effective focal length f2 of the second lens E2 is 2.63 mm; the effective focal length f3 of the third lens E3 is-6.67 mm; the effective focal length f4 of the fourth lens E4 is-90.96 mm; the effective focal length f5 of the fifth lens E5 is 2571.93 mm; the effective focal length f6 of the sixth lens E6 is 2.82 mm; the effective focal length f7 of the seventh lens E7 is-2.03 mm. The total optical length TTL of the imaging lens is 4.99 mm. The ImgH, which is half the diagonal length of the effective pixel area on the imaging plane S17, is 3.41 mm.
Fig. 4A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 2, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 4B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 2. Fig. 4C shows a distortion curve of the optical imaging lens of embodiment 2, which represents the distortion magnitude values in the case of different angles of view. Fig. 4D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 2, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 4A to 4D, the optical imaging lens according to embodiment 2 can achieve good imaging quality.
Example 3
An optical imaging lens according to embodiment 3 of the present application is described below with reference to fig. 5 to 6D. Fig. 5 shows a schematic structural diagram of an optical imaging lens according to embodiment 3 of the present application.
As shown in fig. 5, the optical imaging lens according to the exemplary embodiment of the present application, in order from an object side to an image side along an optical axis, includes: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an image forming surface S17.
The first lens element E1 has negative power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a convex image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a concave object-side surface S13 and a concave image-side surface S14. Filter E8 has an object side S15 and an image side S16. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
Table 5 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens of example 3, wherein the unit of the radius of curvature and the thickness are both millimeters (mm).
Figure BDA0001444740220000151
TABLE 5
As is clear from table 5, in example 3, both the object-side surface and the image-side surface of any one of the first lens element E1 through the seventh lens element E7 are aspheric. Table 6 shows high-order term coefficients that can be used for each aspherical mirror surface in example 3, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
Flour mark A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -4.3347E-02 1.8910E-02 -1.0709E-01 2.2944E-01 -3.4193E-01 3.2054E-01 -1.7552E-01 5.1287E-02 -6.1944E-03
S2 3.4283E-02 -2.7133E-01 3.0470E-01 -4.3235E-02 -2.3620E-01 2.9867E-01 -1.8199E-01 5.7982E-02 -7.6621E-03
S3 -9.6749E-02 3.6023E-02 -1.7794E-01 6.6117E-01 -9.9609E-01 8.7102E-01 -4.7048E-01 1.4614E-01 -1.9946E-02
S4 -1.3424E-01 4.4381E-01 -1.1695E+00 2.0909E+00 -2.4216E+00 1.7937E+00 -8.0713E-01 1.9638E-01 -1.9392E-02
S5 -1.7096E-01 4.4771E-01 -1.1228E+00 2.0208E+00 -2.3450E+00 1.6801E+00 -6.8004E-01 1.2174E-01 -2.3179E-03
S6 -4.1617E-02 2.6136E-02 2.3395E-01 -9.8981E-01 2.1987E+00 -2.8954E+00 2.2701E+00 -9.7225E-01 1.7488E-01
S7 -7.2990E-02 1.8948E-01 -9.1237E-01 2.6370E+00 -4.9576E+00 5.9987E+00 -4.5121E+00 1.9309E+00 -3.5776E-01
S8 -2.0525E-01 5.2312E-01 -1.7839E+00 4.1245E+00 -6.4044E+00 6.3489E+00 -3.8364E+00 1.2922E+00 -1.8620E-01
S9 -2.7913E-01 6.5373E-01 -2.1807E+00 5.1875E+00 -7.9514E+00 7.5714E+00 -4.3521E+00 1.3934E+00 -1.9287E-01
S10 -1.8289E-01 1.9114E-01 -6.9974E-01 1.6172E+00 -2.0951E+00 1.5941E+00 -7.1285E-01 1.7363E-01 -1.7738E-02
S11 1.1044E-02 -1.0992E-01 -2.3413E-01 6.0724E-01 -6.4656E-01 4.0119E-01 -1.5574E-01 3.5716E-02 -3.6443E-03
S12 1.1931E-01 -2.3498E-01 9.7435E-02 1.6646E-02 -1.8685E-02 2.7257E-03 6.3816E-04 -2.1628E-04 1.7033E-05
S13 -9.1644E-02 -1.9390E-01 2.6777E-01 -1.4000E-01 4.0788E-02 -7.2246E-03 7.7586E-04 -4.6510E-05 1.1916E-06
S14 -2.2049E-01 1.5818E-01 -8.0342E-02 3.0849E-02 -8.9927E-03 1.8666E-03 -2.5382E-04 1.9970E-05 -6.8145E-07
TABLE 6
In embodiment 3, the total effective focal length f of the optical imaging lens is 4.12 mm; the effective focal length f1 of the first lens E1 is-24.37 mm; the effective focal length f2 of the second lens E2 is 2.79 mm; the effective focal length f3 of the third lens E3 is-8.04 mm; the effective focal length f4 of the fourth lens E4 is 44458.05 mm; the effective focal length f5 of the fifth lens E5 is-215.18 mm; the effective focal length f6 of the sixth lens E6 is 2.82 mm; the effective focal length f7 of the seventh lens E7 is-2.04 mm. The total optical length TTL of the imaging lens is 4.99 mm. The ImgH, which is half the diagonal length of the effective pixel area on the imaging plane S17, is 3.41 mm.
Fig. 6A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 3, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 6B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 3. Fig. 6C shows a distortion curve of the optical imaging lens of embodiment 3, which represents the distortion magnitude values in the case of different angles of view. Fig. 6D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 3, which represents a deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 6A to 6D, the optical imaging lens according to embodiment 3 can achieve good imaging quality.
Example 4
An optical imaging lens according to embodiment 4 of the present application is described below with reference to fig. 7 to 8D. Fig. 7 shows a schematic structural diagram of an optical imaging lens according to embodiment 4 of the present application.
As shown in fig. 7, an optical imaging lens according to an exemplary embodiment of the present application, in order from an object side to an image side along an optical axis, includes: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an image forming surface S17.
The first lens element E1 has negative power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a convex image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has negative power, and has a concave object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a concave object-side surface S13 and a concave image-side surface S14. Filter E8 has an object side S15 and an image side S16. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
Table 7 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens of example 4, wherein the unit of the radius of curvature and the thickness are both millimeters (mm).
Figure BDA0001444740220000171
Figure BDA0001444740220000181
TABLE 7
As is clear from table 7, in example 4, both the object-side surface and the image-side surface of any one of the first lens element E1 through the seventh lens element E7 are aspheric. Table 8 shows high-order term coefficients that can be used for each aspherical mirror surface in example 4, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
Flour mark A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -4.6168E-02 1.8024E-02 -1.0344E-01 2.4222E-01 -3.9202E-01 3.9199E-01 -2.2759E-01 7.0602E-02 -9.0891E-03
S2 3.6539E-02 -2.7933E-01 3.9169E-01 -3.6760E-01 3.2052E-01 -2.2394E-01 9.6608E-02 -2.1283E-02 1.6825E-03
S3 -8.9458E-02 1.9309E-02 -7.2209E-02 2.7414E-01 -3.1397E-01 2.0295E-01 -9.2847E-02 2.9710E-02 -4.6057E-03
S4 -9.6279E-02 2.0207E-01 -4.0077E-01 5.5805E-01 -4.4455E-01 1.7978E-01 -2.3048E-02 -3.1382E-03 5.6909E-05
S5 -1.2560E-01 2.1811E-01 -4.4838E-01 7.4715E-01 -7.7012E-01 4.6044E-01 -1.5476E-01 2.9638E-02 -3.7639E-03
S6 -3.0435E-02 3.5316E-02 -4.5945E-02 2.4644E-01 -7.1155E-01 1.2193E+00 -1.2171E+00 6.5182E-01 -1.4344E-01
S7 -5.6803E-02 6.5976E-02 -2.7165E-01 3.8263E-01 -3.9366E-02 -7.4284E-01 1.1684E+00 -7.5859E-01 1.8879E-01
S8 -1.9005E-01 3.3524E-01 -1.1080E+00 2.8446E+00 -5.1424E+00 5.6319E+00 -3.5065E+00 1.1367E+00 -1.4756E-01
S9 -2.5361E-01 4.5207E-01 -1.6594E+00 4.9412E+00 -9.1864E+00 1.0078E+01 -6.4178E+00 2.2132E+00 -3.2379E-01
S10 -1.4686E-01 -3.7870E-02 -8.7226E-02 7.5466E-01 -1.4122E+00 1.2997E+00 -6.5853E-01 1.7639E-01 -1.9530E-02
S11 -2.7526E-01 1.6146E-01 3.6704E-02 -9.5536E-02 4.2590E-02 -6.0208E-03 0.0000E+00 0.0000E+00 0.0000E+00
S12 1.2133E-01 -2.3752E-01 8.8297E-02 3.9345E-02 -3.8440E-02 1.1556E-02 -1.5504E-03 7.1095E-05 1.3790E-06
S13 -8.6217E-02 -1.9336E-01 2.5886E-01 -1.3232E-01 3.7655E-02 -6.4998E-03 6.7801E-04 -3.9303E-05 9.6765E-07
S14 -2.1139E-01 1.4779E-01 -7.1994E-02 2.6006E-02 -7.1171E-03 1.4036E-03 -1.8425E-04 1.4184E-05 -4.7780E-07
TABLE 8
In embodiment 4, the total effective focal length f of the optical imaging lens is 4.09 mm; the effective focal length f1 of the first lens E1 is-24.31 mm; the effective focal length f2 of the second lens E2 is 2.79 mm; the effective focal length f3 of the third lens E3 is-8.33 mm; the effective focal length f4 of the fourth lens E4 is-181.98 mm; the effective focal length f5 of the fifth lens E5 is-48.05 mm; the effective focal length f6 of the sixth lens E6 is 2.70 mm; the effective focal length f7 of the seventh lens E7 is-2.05 mm. The total optical length TTL of the imaging lens is 4.99 mm. The ImgH, which is half the diagonal length of the effective pixel area on the imaging plane S17, is 3.41 mm.
Fig. 8A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 4, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 8B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 4. Fig. 8C shows a distortion curve of the optical imaging lens of embodiment 4, which represents the distortion magnitude values in the case of different angles of view. Fig. 8D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 4, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 8A to 8D, the optical imaging lens according to embodiment 4 can achieve good imaging quality.
Example 5
An optical imaging lens according to embodiment 5 of the present application is described below with reference to fig. 9 to 10D. Fig. 9 shows a schematic structural diagram of an optical imaging lens according to embodiment 5 of the present application.
As shown in fig. 9, the optical imaging lens according to the exemplary embodiment of the present application, in order from an object side to an image side along an optical axis, includes: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an image forming surface S17.
The first lens element E1 has negative power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a concave object-side surface S13 and a concave image-side surface S14. Filter E8 has an object side S15 and an image side S16. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
Table 9 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens of example 5, wherein the unit of the radius of curvature and the thickness are both millimeters (mm).
Figure BDA0001444740220000191
Figure BDA0001444740220000201
TABLE 9
As is clear from table 9, in example 5, both the object-side surface and the image-side surface of any one of the first lens element E1 through the seventh lens element E7 are aspheric. Table 10 shows high-order term coefficients that can be used for each aspherical mirror surface in example 5, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
Flour mark A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -4.4162E-02 5.7748E-02 -2.4885E-01 4.9957E-01 -6.4202E-01 5.2015E-01 -2.5348E-01 6.7878E-02 -7.7092E-03
S2 3.1822E-02 -1.2643E-01 -3.8412E-01 1.5517E+00 -2.3968E+00 2.0884E+00 -1.0744E+00 3.0463E-01 -3.6778E-02
S3 -1.0092E-01 1.7283E-01 -8.2740E-01 2.1835E+00 -3.1118E+00 2.6894E+00 -1.4212E+00 4.2429E-01 -5.4970E-02
S4 -1.3303E-01 3.1426E-01 -3.5320E-01 -1.6224E-01 1.1118E+00 -1.5809E+00 1.1356E+00 -4.2156E-01 6.3694E-02
S5 -1.9378E-01 4.5734E-01 -9.4444E-01 1.5631E+00 -1.8658E+00 1.5004E+00 -7.5144E-01 2.0768E-01 -2.4379E-02
S6 -5.5010E-02 4.9491E-02 1.8831E-01 -8.1543E-01 1.7690E+00 -2.2744E+00 1.7307E+00 -7.0780E-01 1.1902E-01
S7 -1.0998E-01 5.6640E-01 -2.8299E+00 8.3504E+00 -1.5600E+01 1.8526E+01 -1.3541E+01 5.5565E+00 -9.7696E-01
S8 -1.4328E-01 2.9213E-01 -8.5159E-01 1.6030E+00 -2.2493E+00 2.1366E+00 -1.2245E+00 3.6966E-01 -4.2720E-02
S9 -2.2545E-01 3.3890E-01 -7.8969E-01 1.6158E+00 -2.5010E+00 2.4475E+00 -1.3812E+00 4.0233E-01 -4.5924E-02
S10 -1.8905E-01 1.0995E-01 -3.4507E-01 9.4376E-01 -1.4310E+00 1.2532E+00 -6.3756E-01 1.7504E-01 -2.0005E-02
S11 2.5686E-02 -2.2545E-01 5.2454E-02 2.1450E-01 -3.1933E-01 2.2434E-01 -9.3510E-02 2.2816E-02 -2.4758E-03
S12 1.2492E-01 -2.8009E-01 1.8577E-01 -6.5892E-02 2.6217E-02 -1.2303E-02 3.6861E-03 -5.5931E-04 3.3436E-05
S13 -7.6268E-02 -2.3763E-01 3.1601E-01 -1.6853E-01 5.0940E-02 -9.4819E-03 1.0843E-03 -7.0289E-05 1.9853E-06
S14 -2.1029E-01 1.4507E-01 -7.4013E-02 2.9432E-02 -8.9373E-03 1.9103E-03 -2.6344E-04 2.0753E-05 -7.0265E-07
Watch 10
In embodiment 5, the total effective focal length f of the optical imaging lens is 4.10 mm; the effective focal length f1 of the first lens E1 is-22.01 mm; the effective focal length f2 of the second lens E2 is 2.82 mm; the effective focal length f3 of the third lens E3 is-8.81 mm; the effective focal length f4 of the fourth lens E4 is 21.39 mm; the effective focal length f5 of the fifth lens E5 is-16.63 mm; the effective focal length f6 of the sixth lens E6 is 2.80 mm; the effective focal length f7 of the seventh lens E7 is-2.06 mm. The total optical length TTL of the imaging lens is 4.99 mm. The ImgH of the half diagonal length of the effective pixel area on the imaging plane S17 is 3.48 mm.
Fig. 10A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 5, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 10B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 5. Fig. 10C shows a distortion curve of the optical imaging lens of embodiment 5, which represents the distortion magnitude values in the case of different angles of view. Fig. 10D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 5, which represents a deviation of different image heights on the imaging surface after light passes through the lens. As can be seen from fig. 10A to 10D, the optical imaging lens according to embodiment 5 can achieve good imaging quality.
Example 6
An optical imaging lens according to embodiment 6 of the present application is described below with reference to fig. 11 to 12D. Fig. 11 shows a schematic structural view of an optical imaging lens according to embodiment 6 of the present application.
As shown in fig. 11, an optical imaging lens according to an exemplary embodiment of the present application, in order from an object side to an image side along an optical axis, includes: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an image forming surface S17.
The first lens element E1 has negative power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has positive power, and has a convex object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a concave object-side surface S13 and a concave image-side surface S14. Filter E8 has an object side S15 and an image side S16. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
Table 11 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens of example 6, wherein the unit of the radius of curvature and the thickness are both millimeters (mm).
Figure BDA0001444740220000221
TABLE 11
As is clear from table 11, in example 6, both the object-side surface and the image-side surface of any one of the first lens E1 to the seventh lens E7 are aspheric. Table 12 shows high-order term coefficients that can be used for each aspherical mirror surface in example 6, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
Flour mark A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -4.2889E-02 4.7161E-02 -1.9335E-01 3.5643E-01 -4.2013E-01 3.0922E-01 -1.3398E-01 3.0751E-02 -2.8264E-03
S2 3.3826E-02 -1.8203E-01 -9.8136E-02 8.8128E-01 -1.4946E+00 1.3443E+00 -7.0217E-01 2.0058E-01 -2.4272E-02
S3 -9.6313E-02 1.0493E-01 -5.1224E-01 1.4508E+00 -2.1143E+00 1.8498E+00 -9.8913E-01 2.9939E-01 -3.9432E-02
S4 -1.5348E-01 5.0151E-01 -1.1861E+00 1.9295E+00 -2.0631E+00 1.3909E+00 -5.3817E-01 9.7306E-02 -4.1887E-03
S5 -2.1002E-01 5.8987E-01 -1.4790E+00 2.8072E+00 -3.6360E+00 3.0546E+00 -1.5638E+00 4.3496E-01 -4.9704E-02
S6 -5.9768E-02 7.8530E-02 1.1554E-01 -7.4078E-01 1.8569E+00 -2.6441E+00 2.1996E+00 -9.8450E-01 1.8260E-01
S7 -8.8565E-02 3.3229E-01 -1.7354E+00 5.2165E+00 -9.8748E+00 1.1873E+01 -8.8072E+00 3.6846E+00 -6.6288E-01
S8 -1.9625E-01 5.2673E-01 -2.1109E+00 5.3058E+00 -8.6489E+00 8.9047E+00 -5.5457E+00 1.9006E+00 -2.7351E-01
S9 -2.4885E-01 5.5945E-01 -1.9703E+00 4.7594E+00 -7.3882E+00 7.1497E+00 -4.1559E+00 1.3251E+00 -1.7839E-01
S10 -1.4935E-01 5.2049E-02 -2.0983E-01 6.6192E-01 -1.0026E+00 8.5151E-01 -4.1939E-01 1.1200E-01 -1.2508E-02
S11 1.9567E-02 -1.9625E-01 6.8001E-02 1.0313E-01 -1.4513E-01 8.5535E-02 -3.1146E-02 7.5521E-03 -8.9247E-04
S12 1.1604E-01 -2.5499E-01 1.4976E-01 -3.4145E-02 7.6047E-03 -5.2307E-03 2.0416E-03 -3.4808E-04 2.1976E-05
S13 -7.2645E-02 -2.4346E-01 3.2011E-01 -1.7011E-01 5.1237E-02 -9.4885E-03 1.0769E-03 -6.9073E-05 1.9247E-06
S14 -1.9727E-01 1.2241E-01 -5.3670E-02 1.8386E-02 -5.0486E-03 1.0186E-03 -1.3555E-04 1.0403E-05 -3.4440E-07
TABLE 12
In embodiment 6, the total effective focal length f of the optical imaging lens is 4.10 mm; the effective focal length f1 of the first lens E1 is-22.15 mm; the effective focal length f2 of the second lens E2 is 2.78 mm; the effective focal length f3 of the third lens E3 is-8.24 mm; the effective focal length f4 of the fourth lens E4 is 120.45 mm; the effective focal length f5 of the fifth lens E5 is 142.42 mm; the effective focal length f6 of the sixth lens E6 is 2.98 mm; the effective focal length f7 of the seventh lens E7 is-2.07 mm. The total optical length TTL of the imaging lens is 4.99 mm. The ImgH of the half diagonal length of the effective pixel area on the imaging plane S17 is 3.49 mm.
Fig. 12A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 6, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 12B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 6. Fig. 12C shows a distortion curve of the optical imaging lens of embodiment 6, which represents the distortion magnitude values in the case of different angles of view. Fig. 12D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 6, which represents a deviation of different image heights on the imaging surface after light passes through the lens. As can be seen from fig. 12A to 12D, the optical imaging lens according to embodiment 6 can achieve good imaging quality.
Example 7
An optical imaging lens according to embodiment 7 of the present application is described below with reference to fig. 13 to 14D. Fig. 13 is a schematic structural view showing an optical imaging lens according to embodiment 7 of the present application.
As shown in fig. 13, the optical imaging lens according to the exemplary embodiment of the present application, in order from an object side to an image side along an optical axis, includes: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an image forming surface S17.
The first lens element E1 has negative power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has negative power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has positive power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a concave object-side surface S13 and a concave image-side surface S14. Filter E8 has an object side S15 and an image side S16. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
Table 13 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens of example 7, wherein the unit of the radius of curvature and the thickness are both millimeters (mm).
Figure BDA0001444740220000241
Watch 13
As is clear from table 13, in example 7, both the object-side surface and the image-side surface of any one of the first lens element E1 through the seventh lens element E7 are aspheric. Table 14 shows high-order term coefficients that can be used for each aspherical mirror surface in example 7, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
Figure BDA0001444740220000242
Figure BDA0001444740220000251
TABLE 14
In embodiment 7, the total effective focal length f of the optical imaging lens is 4.14 mm; the effective focal length f1 of the first lens E1 is-22.54 mm; the effective focal length f2 of the second lens E2 is 2.80 mm; the effective focal length f3 of the third lens E3 is-8.28 mm; the effective focal length f4 of the fourth lens E4 is-1090.27 mm; the effective focal length f5 of the fifth lens E5 is 282.81 mm; the effective focal length f6 of the sixth lens E6 is 2.79 mm; the effective focal length f7 of the seventh lens E7 is-2.00 mm. The total optical length TTL of the imaging lens is 4.99 mm. The ImgH of the half diagonal length of the effective pixel area on the imaging plane S17 is 3.48 mm.
Fig. 14A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 7, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 14B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 7. Fig. 14C shows a distortion curve of the optical imaging lens of embodiment 7, which represents the distortion magnitude values in the case of different angles of view. Fig. 14D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 7, which represents a deviation of different image heights on the imaging surface after light passes through the lens. As can be seen from fig. 14A to 14D, the optical imaging lens according to embodiment 7 can achieve good imaging quality.
Example 8
An optical imaging lens according to embodiment 8 of the present application is described below with reference to fig. 15 to 16D. Fig. 15 shows a schematic structural diagram of an optical imaging lens according to embodiment 8 of the present application.
As shown in fig. 15, the optical imaging lens according to the exemplary embodiment of the present application, in order from an object side to an image side along an optical axis, includes: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an image forming surface S17.
The first lens element E1 has negative power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has negative power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has positive power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a concave object-side surface S13 and a concave image-side surface S14. Filter E8 has an object side S15 and an image side S16. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
Table 15 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens of example 8, wherein the unit of the radius of curvature and the thickness are both millimeters (mm).
Figure BDA0001444740220000261
Watch 15
As is clear from table 15, in example 8, both the object-side surface and the image-side surface of any one of the first lens element E1 through the seventh lens element E7 are aspheric. Table 16 shows high-order term coefficients that can be used for each aspherical mirror surface in example 8, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
Flour mark A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -4.3851E-02 2.4308E-02 -9.3954E-02 1.5825E-01 -1.9274E-01 1.5963E-01 -8.1162E-02 2.2772E-02 -2.7159E-03
S2 -9.0807E-03 -1.6499E-01 2.9365E-01 -3.5015E-01 3.6199E-01 -2.8783E-01 1.4996E-01 -4.4254E-02 5.5432E-03
S3 -1.3231E-01 1.5382E-01 -2.7004E-01 5.8934E-01 -8.1559E-01 7.3230E-01 -4.2235E-01 1.4189E-01 -2.1070E-02
S4 -2.0954E-01 5.5538E-01 -9.0651E-01 8.7838E-01 -4.4566E-01 6.0552E-02 4.0697E-02 -1.5090E-02 3.2582E-04
S5 -3.3839E-01 6.5536E-01 -7.4195E-01 5.5488E-02 1.2476E+00 -1.9759E+00 1.5019E+00 -5.9358E-01 9.7701E-02
S6 -3.1617E-02 -1.4859E-01 1.2218E+00 -3.8295E+00 7.2965E+00 -8.7909E+00 6.5648E+00 -2.7676E+00 5.0453E-01
S7 -9.1614E-02 3.2990E-01 -1.7443E+00 5.7434E+00 -1.2183E+01 1.6514E+01 -1.3794E+01 6.4662E+00 -1.2998E+00
S8 -1.7885E-01 2.8066E-01 -9.9251E-01 2.5979E+00 -4.6795E+00 5.3621E+00 -3.7165E+00 1.4223E+00 -2.3001E-01
S9 -2.3924E-01 4.3751E-01 -1.4155E+00 3.3717E+00 -5.3032E+00 5.1761E+00 -3.0107E+00 9.5057E-01 -1.2440E-01
S10 -1.7938E-01 1.9148E-01 -4.6466E-01 9.3545E-01 -1.1970E+00 9.3417E-01 -4.3515E-01 1.1142E-01 -1.2034E-02
S11 -3.6485E-02 -7.9734E-02 -1.7313E-03 8.8564E-02 -8.6547E-02 3.3314E-02 -4.4911E-03 0.0000E+00 0.0000E+00
S12 1.1102E-01 -2.8331E-01 2.2606E-01 -1.1664E-01 5.6327E-02 -2.1981E-02 5.3840E-03 -7.0714E-04 3.8048E-05
S13 -1.0233E-01 -1.7092E-01 2.3671E-01 -1.1636E-01 3.0670E-02 -4.6851E-03 4.0171E-04 -1.6398E-05 1.6554E-07
S14 -2.0930E-01 1.5863E-01 -8.7860E-02 3.6798E-02 -1.1364E-02 2.4215E-03 -3.3081E-04 2.5833E-05 -8.7002E-07
TABLE 16
In embodiment 8, the total effective focal length f of the optical imaging lens is 4.05 mm; the effective focal length f1 of the first lens E1 is-23.29 mm; the effective focal length f2 of the second lens E2 is 3.54 mm; the effective focal length f3 of the third lens E3 is 537.79 mm; the effective focal length f4 of the fourth lens E4 is-83.83 mm; the effective focal length f5 of the fifth lens E5 is 177.55 mm; the effective focal length f6 of the sixth lens E6 is 2.61 mm; the effective focal length f7 of the seventh lens E7 is-1.93 mm. The total optical length TTL of the imaging lens is 4.97 mm. The ImgH, which is half the diagonal length of the effective pixel area on the imaging plane S17, is 3.41 mm.
Fig. 16A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 8, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 16B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 8. Fig. 16C shows a distortion curve of the optical imaging lens of embodiment 8, which represents the distortion magnitude values in the case of different angles of view. Fig. 16D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 8, which represents a deviation of different image heights on the imaging surface after light passes through the lens. As can be seen from fig. 16A to 16D, the optical imaging lens according to embodiment 8 can achieve good imaging quality.
Example 9
An optical imaging lens according to embodiment 9 of the present application is described below with reference to fig. 17 to 18D. Fig. 17 is a schematic structural view showing an optical imaging lens according to embodiment 9 of the present application.
As shown in fig. 17, an optical imaging lens according to an exemplary embodiment of the present application, in order from an object side to an image side along an optical axis, includes: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an image forming surface S17.
The first lens element E1 has negative power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has negative power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has positive power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a concave object-side surface S13 and a concave image-side surface S14. Filter E8 has an object side S15 and an image side S16. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
Table 17 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens of example 9, wherein the unit of the radius of curvature and the thickness are both millimeters (mm).
Figure BDA0001444740220000281
Figure BDA0001444740220000291
TABLE 17
As is clear from table 17, in example 9, both the object-side surface and the image-side surface of any one of the first lens element E1 through the seventh lens element E7 are aspheric. Table 18 shows high-order term coefficients that can be used for each aspherical mirror surface in example 9, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
Flour mark A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -2.9879E-02 1.1638E-02 -8.1609E-02 1.5796E-01 -1.9806E-01 1.5333E-01 -6.9499E-02 1.6981E-02 -1.7373E-03
S2 5.0252E-02 -3.3824E-01 4.5984E-01 -2.8824E-01 3.9978E-02 7.0726E-02 -5.3591E-02 1.6134E-02 -1.8702E-03
S3 -8.4367E-02 -2.7909E-03 -1.1180E-01 5.5157E-01 -8.5441E-01 7.2852E-01 -3.7005E-01 1.0534E-01 -1.3009E-02
S4 -7.2065E-02 1.3849E-01 -1.8578E-01 1.3689E-01 -3.3113E-02 -1.5509E-02 1.0407E-02 -1.8602E-03 3.1829E-05
S5 -1.3709E-01 1.8255E-01 -1.8603E-01 1.5184E-01 -1.2690E-01 1.3225E-01 -1.0070E-01 3.9335E-02 -5.9472E-03
S6 -4.4370E-02 -3.5029E-03 2.7184E-01 -6.6744E-01 9.4673E-01 -8.3373E-01 4.6174E-01 -1.4746E-01 2.1881E-02
S7 -6.6487E-02 1.2338E-01 -5.6003E-01 1.4579E+00 -2.5752E+00 3.0124E+00 -2.2132E+00 9.2210E-01 -1.6440E-01
S8 -1.5149E-01 1.7065E-01 -6.9053E-01 2.3235E+00 -5.0005E+00 6.1163E+00 -4.1774E+00 1.4936E+00 -2.1814E-01
S9 -2.0806E-01 2.8381E-01 -1.0113E+00 3.1279E+00 -6.0281E+00 6.6723E+00 -4.1647E+00 1.3645E+00 -1.8260E-01
S10 -1.1448E-01 -5.3816E-02 1.1643E-01 1.1082E-01 -4.8469E-01 5.5720E-01 -3.1461E-01 8.9532E-02 -1.0243E-02
S11 1.1556E-02 -1.7534E-01 1.4020E-01 -4.4589E-02 -1.5847E-02 1.3469E-02 -2.2079E-03 0.0000E+00 0.0000E+00
S12 8.4619E-02 -2.1635E-01 1.7791E-01 -1.0490E-01 5.7918E-02 -2.3469E-02 5.6958E-03 -7.3226E-04 3.8455E-05
S13 -9.7517E-02 -1.5386E-01 2.0407E-01 -9.3814E-02 2.2261E-02 -2.8077E-03 1.4886E-04 2.6646E-06 -4.5491E-07
S14 -2.0330E-01 1.3596E-01 -7.1613E-02 3.0778E-02 -1.0033E-02 2.2435E-03 -3.1769E-04 2.5470E-05 -8.7539E-07
Watch 18
In embodiment 9, the total effective focal length f of the optical imaging lens is 3.99 mm; the effective focal length f1 of the first lens E1 is-25.51 mm; the effective focal length f2 of the second lens E2 is 2.97 mm; the effective focal length f3 of the third lens E3 is-11.83 mm; the effective focal length f4 of the fourth lens E4 is-45.58 mm; the effective focal length f5 of the fifth lens E5 is 47.68 mm; the effective focal length f6 of the sixth lens E6 is 2.90 mm; the effective focal length f7 of the seventh lens E7 is-2.13 mm. The total optical length TTL of the imaging lens is 4.99 mm. The ImgH, which is half the diagonal length of the effective pixel area on the imaging plane S17, is 3.41 mm.
Fig. 18A shows an on-axis chromatic aberration curve of an optical imaging lens of embodiment 9, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 18B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 9. Fig. 18C shows a distortion curve of the optical imaging lens of embodiment 9, which represents the distortion magnitude values in the case of different angles of view. Fig. 18D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 9, which represents a deviation of different image heights on the imaging surface after light passes through the lens. As can be seen from fig. 18A to 18D, the optical imaging lens according to embodiment 9 can achieve good imaging quality.
In summary, examples 1 to 9 each satisfy the relationship shown in table 19.
Conditions/examples 1 2 3 4 5 6 7 8 9
f/EPD 1.59 1.59 1.59 1.59 1.58 1.58 1.58 1.60 1.46
|f/f4|+|f/f5| 0.02 0.05 0.02 0.11 0.44 0.06 0.02 0.07 0.17
f/f1 -0.18 -0.17 -0.17 -0.17 -0.19 -0.18 -0.18 -0.17 -0.16
f6/f7 -1.35 -1.39 -1.38 -1.32 -1.36 -1.44 -1.39 -1.35 -1.36
CT1/CT7 1.13 1.03 1.00 1.00 1.00 1.01 1.00 1.17 1.27
f2/R3 1.88 1.73 1.81 1.79 1.87 1.85 1.85 2.46 1.99
f6/R12 -1.63 -1.58 -1.64 -1.56 -1.61 -1.71 -1.83 -1.71 -1.65
CT4/CT5 1.40 0.98 1.28 1.01 1.59 1.14 1.09 1.29 1.33
TTL/ImgH 1.45 1.46 1.46 1.46 1.44 1.43 1.44 1.46 1.46
(R5+R6)/(R5-R6) 3.44 1.68 2.94 3.08 3.29 3.10 3.19 79.10 4.76
|R13/R14| 1.76 1.74 1.69 1.71 1.76 1.85 1.91 1.65 1.37
Watch 19
The present application also provides an imaging device whose electron photosensitive element may be a photo-coupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The imaging device may be a stand-alone imaging device such as a digital camera, or may be an imaging module integrated on 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 application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims (20)

1. An optical imaging lens including seven lenses having refractive power, each of which includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens, the first lens to the seventh lens being arranged in order from an object side to an image side along an optical axis,
the first lens has negative 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 image side surface of the third lens is a concave surface;
the seventh lens has negative focal power, and the object side surface of the seventh lens is a concave surface;
the second lens and the sixth lens have positive optical power;
wherein the total effective focal length f of the optical imaging lens, the effective focal length f4 of the fourth lens and the effective focal length f5 of the fifth lens satisfy | f/f4| + | f/f5| < 1;
the total optical length TTL of the optical imaging lens and the half of the diagonal length ImgH of an effective pixel area on an imaging surface of the optical imaging lens meet the condition that the TTL/ImgH is less than or equal to 1.5; and
at least one of the first lens to the seventh lens is an aspherical lens.
2. The optical imaging lens of claim 1, wherein the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy f/EPD ≦ 1.60.
3. The optical imaging lens of claim 1 or 2, characterized in that the effective focal length f1 of the first lens and the total effective focal length f of the optical imaging lens satisfy-0.5 < f/f1 < 0.
4. The optical imaging lens according to claim 1 or 2, characterized in that the effective focal length f2 of the second lens and the radius of curvature R3 of the object side of the second lens satisfy 1.5 < f2/R3 < 2.5.
5. The optical imaging lens according to claim 1 or 2, characterized in that the effective focal length f6 of the sixth lens and the radius of curvature R12 of the image side surface of the sixth lens satisfy-2 < f6/R12 < -1.
6. The optical imaging lens of claim 5, wherein the effective focal length f6 of the sixth lens and the effective focal length f7 of the seventh lens satisfy-1.5 < f6/f7 < -1.
7. The optical imaging lens of claim 1 or 2, wherein a central thickness CT4 of the fourth lens element on the optical axis and a central thickness CT5 of the fifth lens element on the optical axis satisfy 0.5 < CT4/CT5 < 2.0.
8. The optical imaging lens of claim 7, wherein a central thickness CT1 of the first lens element on the optical axis and a central thickness CT7 of the seventh lens element on the optical axis satisfy 1.00 ≦ CT1/CT7 < 1.50.
9. The optical imaging lens according to claim 1 or 2, characterized in that the radius of curvature R5 of the object-side surface of the third lens and the radius of curvature R6 of the image-side surface of the third lens satisfy 1.5 < (R5+ R6)/(R5-R6) ≦ 80.
10. The optical imaging lens according to claim 1 or 2, characterized in that a radius of curvature R13 of an object-side surface of the seventh lens and a radius of curvature R14 of an image-side surface of the seventh lens satisfy | R13/R14| ≦ 2.
11. An optical imaging lens including seven lenses having refractive power, each of which includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens, the first lens to the seventh lens being arranged in order from an object side to an image side along an optical axis,
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 image side surface of the third lens is a concave surface;
the seventh lens has negative focal power, and the object side surface of the seventh lens is a concave surface;
the second lens and the sixth lens have positive optical power;
wherein a central thickness CT1 of the first lens on the optical axis and a central thickness CT7 of the seventh lens on the optical axis satisfy 1.00 ≦ CT1/CT7 < 1.50;
the total optical length TTL of the optical imaging lens and the half of the diagonal length ImgH of an effective pixel area on an imaging surface of the optical imaging lens meet the condition that the TTL/ImgH is less than or equal to 1.5; and
at least one of the first lens to the seventh lens is an aspherical lens.
12. The optical imaging lens of claim 11, wherein a radius of curvature R13 of an object-side surface of the seventh lens and a radius of curvature R14 of an image-side surface of the seventh lens satisfy | R13/R14| ≦ 2.
13. The optical imaging lens of claim 12, wherein the radius of curvature R5 of the object-side surface of the third lens and the radius of curvature R6 of the image-side surface of the third lens satisfy 1.5 < (R5+ R6)/(R5-R6) ≦ 80.
14. The optical imaging lens of claim 11, wherein an effective focal length f6 of the sixth lens and a radius of curvature R12 of an image side surface of the sixth lens satisfy-2 < f6/R12 < -1.
15. The optical imaging lens of claim 11, wherein the effective focal length f6 of the sixth lens and the effective focal length f7 of the seventh lens satisfy-1.5 < f6/f7 < -1.
16. The optical imaging lens of claim 11, wherein the total effective focal length f of the optical imaging lens, the effective focal length f4 of the fourth lens and the effective focal length f5 of the fifth lens satisfy | f/f4| + | f/f5| < 1.
17. The optical imaging lens of claim 11, wherein the effective focal length f2 of the second lens and the radius of curvature R3 of the object side of the second lens satisfy 1.5 < f2/R3 < 2.5.
18. The optical imaging lens of claim 11, wherein the first lens has a negative power, and an effective focal length f1 of the first lens and a total effective focal length f of the optical imaging lens satisfy-0.5 < f/f1 < 0.
19. The optical imaging lens of claim 11, wherein a central thickness CT4 of the fourth lens element on the optical axis and a central thickness CT5 of the fifth lens element on the optical axis satisfy 0.5 < CT4/CT5 < 2.0.
20. The optical imaging lens as claimed in any one of claims 11 to 19, wherein the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy f/EPD ≦ 1.60.
CN201711007397.7A 2017-10-25 2017-10-25 Optical imaging lens Active CN107621682B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201711007397.7A CN107621682B (en) 2017-10-25 2017-10-25 Optical imaging lens
PCT/CN2018/092868 WO2019080528A1 (en) 2017-10-25 2018-06-26 Optical imaging lens
US16/274,718 US11169362B2 (en) 2017-10-25 2019-02-13 Optical imaging lens assembly

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CN111258037A (en) * 2020-03-20 2020-06-09 辽宁中蓝光电科技有限公司 7 high pixel camera lens of piece formula wide angle
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