Optical lens and electronic equipment

Abstract

The invention discloses an optical lens and electronic equipment comprising the same. The optical lens sequentially comprises a first lens with negative focal power from an object side to an image side along an optical axis, a second lens with negative focal power, a third lens with positive focal power and a fourth lens with negative focal power, the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a convex surface; the third lens has positive focal power; the fourth lens has positive focal power; the fifth lens has positive focal power; the sixth lens has negative focal power; and a seventh lens having focal power. The number of the lenses with focal power in the optical lens is seven.

Description

[0001] Divisional application statement

[0002] This application is a divisional application of the Chinese invention patent application with the invention name “Optical lens and electronic device” and application number 202010461914.3 filed on May 27, 2020. Technical Field

[0003] The present application relates to the field of optical elements, and in particular to an optical lens and an electronic device including the optical lens. Background Art

[0004] In recent years, the automotive assisted driving system has developed rapidly, and the on-board optical lens plays an irreplaceable role as the eyes of the car to obtain external information. In order to obtain information more accurately, the system needs to be equipped with a larger chip with higher resolution, so the resolution requirements of the optical lens itself are getting higher and higher. In order to meet higher imaging quality requirements, more lens structures are often selected, but this will increase costs and seriously affect the miniaturization of the lens.

[0005] In addition, for safety reasons, the on-board optical lenses used in the field of autonomous driving have high requirements for stability and need to be able to cope with various harsh environments to avoid significant degradation of lens performance in different environments.

[0006] Therefore, the current market needs an optical lens that can match large chips, has high resolution, and takes into account the characteristics of low cost, miniaturization, small distortion, and good temperature performance to meet the requirements of autonomous driving applications. Summary of the invention

[0007] One aspect of the present application provides an optical lens, which may include, in order from the object side to the image side along the optical axis: a first lens with negative optical power, whose object side surface is convex and whose image side surface is concave; a second lens with optical power, whose object side surface is concave and whose image side surface is convex; a third lens with positive optical power; a fourth lens with positive optical power, whose object side surface is convex and whose image side surface is convex; a fifth lens with positive optical power, whose object side surface is convex and whose image side surface is convex; a sixth lens with negative optical power; and a seventh lens with positive optical power, wherein the fifth lens and the sixth lens form a cemented lens.

[0008] In one embodiment, the object-side surface of the third lens element may be a convex surface, and the image-side surface may be a concave surface.

[0009] In one embodiment, the object-side surface of the third lens element may be a convex surface, and the image-side surface may be a convex surface.

[0010] In one embodiment, the object-side surface of the sixth lens element may be a concave surface, and the image-side surface may be a concave surface.

[0011] In one embodiment, the object-side surface of the sixth lens element may be a concave surface, and the image-side surface may be a convex surface.

[0012] In one embodiment, the object-side surface of the seventh lens element may be a convex surface, and the image-side surface may be a convex surface.

[0013] In one embodiment, the object-side surface of the seventh lens element may be a convex surface, and the image-side surface may be a concave surface.

[0014] In one embodiment, the total optical length TTL of the optical lens and the entire focal length value F of the optical lens may satisfy: TTL / F≤10.

[0015] In one embodiment, the maximum field of view FOV of the optical lens, the maximum light clearance D of the object side of the first lens corresponding to the maximum field of view of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens may satisfy: D / H / FOV≤0.02.

[0016] In one embodiment, the optical back focus BFL of the optical lens and the lens group length TL of the optical lens may satisfy: BFL / TL≥0.1.

[0017] In one embodiment, the entire focal length value F of the optical lens, the maximum field of view FOV of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens may satisfy: 50≤(FOV×F) / H≤70.

[0018] In one embodiment, the focal length F3 of the third lens and the focal length F4 of the fourth lens may satisfy: |F3 / F4|≥0.6.

[0019] In one embodiment, the focal length F4 of the fourth lens and the focal length F5 of the fifth lens may satisfy: 0.5≤|F4 / F5|≤2.5.

[0020] In one embodiment, the focal length F5 of the fifth lens and the focal length F6 of the sixth lens may satisfy: 0.5≤|F5 / F6|≤3.5.

[0021] In one embodiment, the entire focal length F of the optical lens set and the curvature radius R11 of the object-side surface of the first lens may satisfy: |F / R11|≤0.5.

[0022] In one embodiment, a curvature radius R12 of the image-side surface of the first lens and a curvature radius R21 of the object-side surface of the second lens may satisfy: R12 / R21≥-1.0.

[0023] In one embodiment, a curvature radius R41 of the object-side surface of the fourth lens and a curvature radius R42 of the image-side surface of the fourth lens may satisfy: R41 / R42≤-0.2.

[0024] In one embodiment, the entire focal length value F of the optical lens, the maximum field of view FOV of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens may satisfy: (H-FOV×F) / FOV×F≤-0.4.

[0025] In one embodiment, the spacing distance d4 between the second lens and the third lens on the optical axis and the total optical length TTL of the optical lens may satisfy: d4 / TTL≤0.004.

[0026] In one embodiment, a curvature radius R11 of the object-side surface of the first lens and a curvature radius R12 of the image-side surface of the first lens may satisfy: 2.0≤R11 / R12≤8.0.

[0027] In one embodiment, the entire focal length value F of the optical lens and the image height H corresponding to the maximum field angle of the optical lens satisfy: F / H≤0.55.

[0028] Another aspect of the present application provides such an optical lens, which may include, in order from the object side to the image side along the optical axis: a first lens, whose object side surface is convex and whose image side surface is concave; a second lens, whose object side surface is concave and whose image side surface is convex; a third lens; a fourth lens, whose object side surface is convex and whose image side surface is convex; a fifth lens, whose object side surface is convex and whose image side surface is convex; a sixth lens; a seventh lens; and the fifth lens and the sixth lens form a cemented lens. The focal length value F of the entire group of the optical lens, the maximum field of view FOV of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens may satisfy: (H-FOV×F) / FOV×F≤-0.4.

[0029] In one embodiment, the third lens element may have positive refractive power, and its object-side surface may be convex, and its image-side surface may be concave.

[0030] In one embodiment, the third lens element may have positive refractive power, and its object-side surface may be convex, and its image-side surface may be convex.

[0031] In one embodiment, the sixth lens element may have negative optical power, and its object-side surface may be concave, and its image-side surface may be concave.

[0032] In one embodiment, the sixth lens element may have negative optical power, and its object-side surface may be concave, and its image-side surface may be convex.

[0033] In one embodiment, the seventh lens element may have positive refractive power, and its object-side surface may be convex, and its image-side surface may be convex.

[0034] In one embodiment, the seventh lens element may have positive refractive power, with its object-side surface being convex and its image-side surface being concave.

[0035] In one embodiment, the total optical length TTL of the optical lens and the entire focal length value F of the optical lens may satisfy: TTL / F≤10.

[0036] In one embodiment, the maximum field of view FOV of the optical lens, the maximum light clearance D of the object side of the first lens corresponding to the maximum field of view of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens may satisfy: D / H / FOV≤0.02.

[0037] In one embodiment, the optical back focus BFL of the optical lens and the lens group length TL of the optical lens may satisfy: BFL / TL≥0.1.

[0038] In one embodiment, the entire focal length value F of the optical lens, the maximum field of view FOV of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens may satisfy: 50≤(FOV×F) / H≤70.

[0039] In one embodiment, the focal length F3 of the third lens and the focal length F4 of the fourth lens may satisfy: |F3 / F4|≥0.6.

[0040] In one embodiment, the focal length F4 of the fourth lens and the focal length F5 of the fifth lens may satisfy: 0.5≤|F4 / F5|≤2.5.

[0041] In one embodiment, the focal length F5 of the fifth lens and the focal length F6 of the sixth lens may satisfy: 0.5≤|F5 / F6|≤3.5.

[0042] In one embodiment, the entire focal length F of the optical lens set and the curvature radius R11 of the object-side surface of the first lens may satisfy: |F / R11|≤0.5.

[0043] In one embodiment, a curvature radius R12 of the image-side surface of the first lens and a curvature radius R21 of the object-side surface of the second lens may satisfy: R12 / R21≥-1.0.

[0044] In one embodiment, a curvature radius R41 of the object-side surface of the fourth lens and a curvature radius R42 of the image-side surface of the fourth lens may satisfy: R41 / R42≤-0.2.

[0045] In one embodiment, the spacing distance d4 between the second lens and the third lens on the optical axis and the total optical length TTL of the optical lens satisfy: d4 / TTL≤0.004.

[0046] In one embodiment, a curvature radius R11 of the object-side surface of the first lens and a curvature radius R12 of the image-side surface of the first lens may satisfy: 2.0≤R11 / R12≤8.0.

[0047] In one embodiment, the entire focal length value F of the optical lens and the image height H corresponding to the maximum field angle of the optical lens satisfy: F / H≤0.55.

[0048] Another aspect of the present application provides an electronic device, which includes the optical lens provided by the present application and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

[0049] The optical lens provided in the present application uses multiple lenses, such as the first lens to the seventh lens, and achieves at least one of the beneficial effects of the optical lens, such as high resolution, miniaturization, small front aperture, large field of view, small distortion, and low cost, by optimizing the shape of the lenses, reasonably allocating the optical focal length of each lens, and forming a cemented lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] 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:

[0051] Figure 1 A schematic structural diagram of an optical lens according to Embodiment 1 of the present application is shown;

[0052] Figure 2 A schematic structural diagram of an optical lens according to Embodiment 2 of the present application is shown;

[0053] Figure 3 A schematic structural diagram of an optical lens according to Embodiment 3 of the present application is shown;

[0054] Figure 4 A schematic structural diagram of an optical lens according to Embodiment 4 of the present application is shown;

[0055] Figure 5 A schematic structural diagram of an optical lens according to Embodiment 5 of the present application is shown;

[0056] Figure 6 A schematic structural diagram of an optical lens according to Embodiment 6 of the present application is shown;

[0057] Figure 7 A schematic structural diagram of an optical lens according to Embodiment 7 of the present application is shown;

[0058] Figure 8 A schematic structural diagram of an optical lens according to Example 8 of the present application is shown;

[0059] Fig. 9A schematic structural diagram of an optical lens according to Embodiment 9 of the present application is shown; and

[0060] Fig.10 A schematic structural diagram of an optical lens according to Example 10 of the present application is shown. DETAILED DESCRIPTION

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] The features, principles and other aspects of the present application are described in detail below.

[0069] The optical lens according to the exemplary embodiment of the present application may include, for example, seven lenses with optical power, namely, 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.

[0070] The optical lens according to the exemplary embodiment of the present application may further include a photosensitive element disposed on the imaging surface. Optionally, the photosensitive element disposed on the imaging surface may be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS).

[0071] The first lens may have a negative focal length, which can improve the imaging quality of the optical lens, prevent the object side light from being too divergent, and help control the aperture of the rear lens. The first lens is arranged in a meniscus shape, with its object side being convex and its image side being concave, so as to collect as much light of a large field of view as possible and enter the rear system, thereby effectively increasing the amount of light passing through and achieving the range of an overall large field of view; at the same time, the object side of the first lens is arranged as a convex surface, which is conducive to the sliding of water droplets in actual use environments (such as rainy and snowy weather, etc.), and can effectively reduce the impact of harsh environments on imaging, for example.

[0072] The second lens may have positive or negative focal power, which is beneficial to further converge or diverge the light, and reduce the chromatic aberration of the system by adjusting the light. The object side and image side of the second lens are preferably arranged as aspherical mirror surfaces to improve the resolution quality of the optical lens.

[0073] The third lens may have positive power, which is beneficial for converging and adjusting the light so as to make a smooth optical transition to the rear lens; and can balance the spherical aberration introduced by the first and second lenses.

[0074] The fourth lens may have positive focal length, which is beneficial for converging and adjusting the light so as to make an optically smooth transition to the rear lens. The object side and image side of the fourth lens are preferably arranged as aspherical mirror surfaces to further improve the resolution quality of the optical lens.

[0075] The fifth lens may have positive power, the sixth lens may have negative power, and the fifth lens and the sixth lens are combined into a cemented lens.

[0076] As known to those skilled in the art, cemented lenses can be used to minimize or eliminate chromatic aberration. Using cemented lenses in optical lenses can improve image quality and reduce reflection loss of light energy, thereby improving the clarity of lens imaging. In addition, the use of cemented lenses can also simplify the assembly process during the lens manufacturing process.

[0077] By gluing the image side surface of the fifth lens and the object side surface of the sixth lens to form a cemented lens, the light passing through the fourth lens can be smoothly transferred to the imaging surface; it helps to reduce the air space between the lenses and the total length of the entire system; it can also fully correct various aberrations in the optical system, so that the optical system has a more compact structure, further improve the resolution of the optical lens, and optimize optical properties such as distortion and chief ray angle (Chief-Ray-Angle).

[0078] Providing a cemented lens can achieve the following beneficial effects: it helps to reduce the air gap between the fifth and sixth lenses, thereby reducing the total length of the entire optical system; it reduces the number of assembly components between the fifth and sixth lenses, reduces the number of processing steps for the optical lens, and reduces the manufacturing cost of the lens; it reduces problems such as the sensitivity of lens unit tolerances such as tilt / eccentricity generated during the assembly process; it reduces the loss of light caused by reflection between lenses, thereby improving the illumination of the optical lens; and it further reduces the field curvature of the optical system and corrects the off-axis point aberration of the system.

[0079] The seventh lens may have positive focal power, and can smoothly transition the light passing through the cemented lens to the imaging surface, reduce the total length of the optical lens, correct the astigmatism and field curvature of the system, and improve the resolution of the optical lens. The object side and image side of the seventh lens are preferably arranged as aspherical mirror surfaces to further improve the resolution quality of the optical lens.

[0080] Optionally, an aperture for limiting the light beam may be provided between the third lens and the fourth lens to further improve the imaging quality of the lens. When the aperture is provided between the third lens and the fourth lens, it is beneficial to effectively converge the light entering the optical system, thereby reducing the total length of the optical system and the front port diameter of the lens. However, it should be noted that the position of the aperture disclosed herein is only an example and not a limitation; in alternative embodiments, the aperture may also be provided at other positions according to actual needs.

[0081] Optionally, the optical 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.

[0082] In an exemplary embodiment, at least one of the mirror surfaces of each lens is an aspherical mirror surface, that is, at least one of the mirror surfaces from the object side of the first lens to the image side of the seventh lens is an aspherical mirror surface. The characteristic of an aspherical lens is that the curvature changes 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 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, at least one of the object side and image side of each lens in the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens is an aspherical mirror surface. Optionally, the object side and image side of each lens in the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens are all aspherical mirror surfaces.

[0083] In an exemplary embodiment, the total optical length TTL of the optical lens and the focal length value F of the entire group of the optical lens may satisfy: TTL / F≤10. For example, TTL / F≤9. By constraining the ratio of the total optical length to the total focal length of the system within a reasonable numerical range, the total length of the optical lens can be effectively reduced, thereby achieving miniaturization of the optical lens.

[0084] In an exemplary embodiment, the maximum field of view FOV of the optical lens, the maximum clear aperture D of the object side of the first lens corresponding to the maximum field of view of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens may satisfy: D / H / FOV≤0.02. For example, D / H / FOV≤0.015. Reasonable control of the relationship between the maximum field of view of the optical lens, the maximum clear semi-aperture of the object side of the first lens corresponding to the maximum field of view of the optical lens, and the image height corresponding to the maximum field of view of the optical lens can ensure a small front aperture of the optical lens, which is conducive to miniaturization of the optical lens; and can shorten the total optical length of the lens, reduce the sensitivity of the lens to the Modulation Transfer Function, improve the lens production yield, and reduce production costs.

[0085] In an exemplary embodiment, the optical back focus BFL of the optical lens and the length TL of the lens group of the optical lens may satisfy: BFL / TL≥0.1. For example, BFL / TL≥0.11. By constraining the ratio of the optical back focus of the optical lens to the length of the lens group of the optical lens within a reasonable numerical range, it is beneficial to achieve a back focus length on the basis of miniaturization and facilitate assembly of the module.

[0086] In an exemplary embodiment, the entire set of focal length values ​​F of the optical lens, the maximum field of view FOV of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens may satisfy: 50≤(FOV×F) / H≤70. For example, 55≤(FOV×F) / H≤65. Reasonable control of the relationship between the entire set of focal length values ​​of the optical lens, the maximum field of view of the optical lens, and the image height corresponding to the maximum field of view of the optical lens can achieve a large angular resolution of the optical lens; it helps to meet the small distortion and large field of view of the optical lens while improving the overall effect of the optical system.

[0087] In an exemplary embodiment, the focal length value F3 of the third lens and the focal length value F4 of the fourth lens may satisfy: |F3 / F4|≥0.6. For example, |F3 / F4|≥0.7 constrains the ratio of the focal length values ​​of the third lens and the fourth lens to be within a reasonable numerical range, so that the distance between the adjacent third lens and the fourth lens is very close, which is conducive to the smooth transition of light to the rear imaging surface, thereby improving the resolution quality of the optical lens.

[0088] In an exemplary embodiment, the focal length value F4 of the fourth lens and the focal length value F5 of the fifth lens may satisfy: 0.5≤|F4 / F5|≤2.5. For example, 1.0≤|F4 / F5|≤2.0. By constraining the ratio of the focal length values ​​of the fourth lens and the fifth lens to be within a reasonable numerical range, the distance between the adjacent fourth lens and the fifth lens is very close, which is conducive to the smooth transition of light to the rear imaging surface, thereby improving the resolution quality of the optical lens.

[0089] In an exemplary embodiment, the focal length value F5 of the fifth lens and the focal length value F6 of the sixth lens may satisfy: 0.5≤|F5 / F6|≤3.5. For example, 1.0≤|F5 / F6|≤3.0. By constraining the ratio of the focal length values ​​of the fifth lens and the sixth lens to be within a reasonable numerical range, the distance between the adjacent fifth lens and the sixth lens is very close, which is conducive to the smooth transition of light to the rear imaging surface, thereby improving the resolution quality of the optical lens.

[0090] In an exemplary embodiment, the whole set focal length value F of the optical lens and the curvature radius R11 of the object side surface of the first lens may satisfy: |F / R11|≤0.5. For example, |F / R11|≤0.4. By constraining the ratio of the whole set focal length value of the optical lens to the curvature radius of the object side surface of the first lens to be within a reasonable numerical range, the problem of too small curvature radius of the object side surface of the first lens can be avoided, and the aberration generated by the system when the light is incident can be effectively avoided, and the production and processing of the first lens can be facilitated.

[0091] In an exemplary embodiment, the radius of curvature R12 of the image side surface of the first lens and the radius of curvature R21 of the object side surface of the second lens may satisfy: R12 / R21≥-1.0. For example, R12 / R21≥-0.9. By constraining the ratio of the radius of curvature of the image side surface of the first lens to the object side surface of the second lens within a reasonable numerical range, the aberration of the optical system can be corrected, and it is ensured that when the light emitted from the first lens is incident on the object side surface of the second lens, the incident light is relatively gentle, thereby reducing the tolerance sensitivity of the optical lens.

[0092] In an exemplary embodiment, the curvature radius R41 of the object side surface of the fourth lens and the curvature radius R42 of the image side surface of the fourth lens may satisfy: R41 / R42≤-0.2. For example, R41 / R42≤-0.25. By constraining the ratio of the curvature radius of the object side surface to the image side surface of the fourth lens to be within a reasonable numerical range, the tolerance sensitivity of the fourth lens can be reduced, which is beneficial to the assembly of the optical lens.

[0093] In an exemplary embodiment, the entire set of focal length values ​​F of the optical lens, the maximum field of view FOV of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens may satisfy: (H-FOV×F) / FOV×F≤-0.4. For example, (H-FOV×F) / FOV×F≤-0.45. Reasonable control of the relationship between the entire set of focal length values ​​of the optical lens, the maximum field of view of the optical lens, and the image height corresponding to the maximum field of view of the optical lens can ensure that the focal length of the lens is increased and the imaging effect of the central area of ​​the imaging surface of the lens is highlighted when the field of view angle of the optical lens and the size of the imaging surface remain unchanged.

[0094] In an exemplary embodiment, the distance d4 between the second lens and the third lens on the optical axis and the total optical length TTL of the optical lens may satisfy: d4 / TTL≤0.004. For example, d4 / TTL≤0.0035. By constraining the ratio of the distance between the second lens and the third lens on the optical axis to the total optical length of the optical lens to be within a reasonable numerical range, the adjacent second lens and the third lens can be placed closer together, which is beneficial to the smooth transition of light and improves the resolution quality of the optical lens.

[0095] In an exemplary embodiment, the radius of curvature R11 of the object side surface of the first lens and the radius of curvature R12 of the image side surface of the first lens may satisfy: 2.0≤R11 / R12≤8.0. For example, 3.2≤R11 / R12≤6.0. By constraining the ratio of the radius of curvature of the object side surface and the image side surface of the first lens to be within a reasonable numerical range, a first lens of a special shape may be provided to improve the resolution of the optical lens.

[0096] In an exemplary embodiment, the whole set of focal length values ​​F of the optical lens and the image height H corresponding to the maximum field angle of the optical lens may satisfy: F / H≤0.55. For example, F / H≤0.50. By constraining the ratio of the whole set of focal length values ​​of the optical lens to the image height corresponding to the maximum field angle of the optical lens to be within a reasonable numerical range, it is helpful to improve the resolution quality of the optical lens.

[0097] The optical lens according to the above-mentioned embodiment of the present application may use multiple lenses, such as the seven lenses described above. By reasonably allocating the focal power, surface shape, focal length value of each lens, and curvature radius of each lens, etc., the incident light can be effectively converged, the total optical length of the optical lens can be shortened, and the processability of the optical lens can be improved, making the optical lens more conducive to production and processing. The optical lens according to the above-mentioned embodiment of the present application may have characteristics such as high resolution, low cost, long back focus, good temperature performance, miniaturization, large aperture, small front end diameter, reasonable use of glued parts and simple structure.

[0098] 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 lens can be changed to obtain the various results and advantages described in this specification. For example, although seven lenses are described as an example in the embodiment, the optical lens is not limited to including seven lenses. If necessary, the optical lens may also include other numbers of lenses.

[0099] Specific embodiments of the optical lens applicable to the above-mentioned embodiments are further described below with reference to the accompanying drawings.

[0100] Example 1

[0101] The following reference Figure 1 An optical lens according to Example 1 of the present application is described. Figure 1 is a schematic diagram showing the structure of an optical lens according to Example 1 of the present application.

[0102] like Figure 1 As shown, the optical lens includes, in order from the object side to the image side along the optical axis: a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7.

[0103] The first lens L1 is a meniscus lens with negative refractive power, whose object-side surface S1 is convex, and whose image-side surface S2 is concave. Both the object-side surface S1 and the image-side surface S2 of the first lens L1 are spherical surfaces.

[0104] The second lens L2 is a meniscus lens with negative refractive power, whose object-side surface S3 is a concave surface, and whose image-side surface S4 is a convex surface. Both the object-side surface S3 and the image-side surface S4 of the second lens L2 are aspherical surfaces.

[0105] The third lens L3 is a meniscus lens with positive refractive power, whose object-side surface S5 is convex, and whose image-side surface S6 is concave. Both the object-side surface S5 and the image-side surface S6 of the third lens L3 are spherical surfaces.

[0106] The fourth lens L4 is a biconvex lens with positive refractive power, wherein the object-side surface S8 thereof is a convex surface, the image-side surface S9 thereof is a convex surface, and both the object-side surface S8 and the image-side surface S9 of the fourth lens L4 are spherical surfaces.

[0107] The fifth lens L5 is a biconvex lens with positive refractive power, wherein the object-side surface S10 thereof is a convex surface, the image-side surface S11 thereof is a convex surface, and both the object-side surface S10 and the image-side surface S11 of the fifth lens L5 are spherical surfaces.

[0108] The sixth lens L6 is a biconcave lens with negative refractive power, wherein the object-side surface S11 thereof is a concave surface, the image-side surface S12 thereof is a concave surface, and both the object-side surface S11 and the image-side surface S12 of the sixth lens L6 are spherical surfaces.

[0109] The seventh lens L7 is a biconvex lens with positive refractive power, wherein the object-side surface S13 thereof is a convex surface, the image-side surface S14 thereof is a convex surface, and both the object-side surface S13 and the image-side surface S14 of the seventh lens L7 are aspherical surfaces.

[0110] In this embodiment, the fifth lens L5 and the sixth lens L6 are combined into a cemented lens.

[0111] Optionally, the optical lens may further include a filter L8 and / or a protective glass L8 having an object side surface S15 and an image side surface S16. The filter L8 may be used to correct color deviation, and the protective glass L8 may be used to protect the image sensor chip located at the imaging surface IMA. Light from the object passes through each surface S1 to S16 in sequence and is finally imaged on the imaging surface IMA.

[0112] In the optical lens of this embodiment, the aperture STO can be arranged between the third lens L3 and the fourth lens L4 to further improve the imaging quality.

[0113] Table 1 shows the basic parameters of the optical lens of Example 1, wherein the units of the radius of curvature and thickness / distance are both millimeters (mm).

[0114]

[0115] Table 1

[0116] In this embodiment, the object-side surface and the image-side surface of the second lens L2 and the seventh lens L7 are both aspherical surfaces, and the surface shape Z of each aspherical lens can be defined by but not limited to the following aspherical surface formula:

[0117]

[0118] Wherein, Z 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 inverse of the radius of curvature in Table 1 above); k is the conic coefficient conic; A, B, C, D, E, F, etc. are all high-order coefficients. Table 2 below shows the conic coefficient k and the high-order coefficients A, B, C, D, E, F and G that can be used for the aspheric lens surfaces S3, S4, S13 and S14 in Example 1.

[0119]

[0120]

[0121] Table 2

[0122] Table 3 below shows the optical length TTL of the optical lens of Example 1 (i.e., the distance from the center of the object-side surface S1 of the first lens L1 to the imaging surface IMA on the optical axis), the focal length F of the entire optical lens group, the maximum clear aperture D of the object-side surface S1 of the first lens L1 corresponding to the maximum field of view FOV of the optical lens, the image height H corresponding to the maximum field of view FOV of the optical lens, the maximum field of view FOV of the optical lens, the optical back focus BFL of the optical lens (the distance from the center of the image-side surface S14 of the seventh lens L7 of the optical lens to the imaging surface IMA of the optical lens on the optical axis), the lens group length TL of the optical lens (the distance from the center of the object-side surface S1 of the first lens L1 to the center of the image-side surface S14 of the seventh lens L7 on the optical axis), the focal length F3 of the third lens L3, the focal length F4 of the fourth lens L4, the focal length F5 of the fifth lens L5, and the focal length F6 of the sixth lens L6.

[0123] TTL(mm) 31.0892 TL(mm) 26.7937 F(mm) 4.0045 F3(mm) 18.4408 D(mm) 12.4400 F4(mm) 12.8622 H(mm) 9.0844 F5(mm) 8.9731 FOV(°) 140 F6(mm) -4.2489 BFL(mm) 4.2954

[0124] Table 3

[0125] Example 2

[0126] The following reference Figure 2 Describe the optical lens according to Example 2 of the present application. Figure 2 is a schematic diagram showing the structure of an optical lens according to Example 2 of the present application.

[0127] like Figure 2 As shown, the optical lens includes, in order from the object side to the image side along the optical axis: a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7.

[0128] The first lens L1 is a meniscus lens with negative refractive power, whose object-side surface S1 is convex, and whose image-side surface S2 is concave. Both the object-side surface S1 and the image-side surface S2 of the first lens L1 are spherical surfaces.

[0129] The second lens L2 is a meniscus lens with negative refractive power, whose object-side surface S3 is a concave surface, and whose image-side surface S4 is a convex surface. Both the object-side surface S3 and the image-side surface S4 of the second lens L2 are aspherical surfaces.

[0130] The third lens L3 is a meniscus lens with positive refractive power, whose object-side surface S5 is convex, and whose image-side surface S6 is concave. Both the object-side surface S5 and the image-side surface S6 of the third lens L3 are spherical surfaces.

[0131] The fourth lens L4 is a biconvex lens with positive refractive power, wherein the object-side surface S8 thereof is a convex surface, the image-side surface S9 thereof is a convex surface, and both the object-side surface S8 and the image-side surface S9 of the fourth lens L4 are spherical surfaces.

[0132] The fifth lens L5 is a biconvex lens with positive refractive power, wherein the object-side surface S10 thereof is a convex surface, the image-side surface S11 thereof is a convex surface, and both the object-side surface S10 and the image-side surface S11 of the fifth lens L5 are spherical surfaces.

[0133] The sixth lens L6 is a biconcave lens with negative refractive power, wherein the object-side surface S11 thereof is a concave surface, the image-side surface S12 thereof is a concave surface, and both the object-side surface S11 and the image-side surface S12 of the sixth lens L6 are spherical surfaces.

[0134] The seventh lens L7 is a biconvex lens with positive refractive power, wherein the object-side surface S13 thereof is a convex surface, the image-side surface S14 thereof is a convex surface, and both the object-side surface S13 and the image-side surface S14 of the seventh lens L7 are aspherical surfaces.

[0135] In this embodiment, the fifth lens L5 and the sixth lens L6 are combined into a cemented lens.

[0136] Optionally, the optical lens may further include a filter L8 and / or a protective glass L8 having an object side surface S15 and an image side surface S16. The filter L8 may be used to correct color deviation, and the protective glass L8 may be used to protect the image sensor chip located at the imaging surface IMA. Light from the object passes through each surface S1 to S16 in sequence and is finally imaged on the imaging surface IMA.

[0137] In the optical lens of this embodiment, the aperture STO can be arranged between the third lens L3 and the fourth lens L4 to further improve the imaging quality.

[0138] Table 4 shows the basic parameter table of the optical lens of Example 2, wherein the units of the radius of curvature and thickness / distance are both millimeters (mm).

[0139]

[0140] Table 4

[0141] The following Table 5 shows the cone coefficient k and the higher-order coefficients A, B, C, D, E, F and G that can be used for the aspherical lens surfaces S3, S4, S13 and S14 in Example 2.

[0142] Face number k A B C D E F G S3 0.5353 -7.5210E-06 7.3668E-06 -8.6720E-07 1.6880E-07 -1.2034E-08 4.3093E-10 -5.7835E-12 S4 -0.8896 -4.1659E-06 6.1399E-07 1.3109E-07 -9.3904E-09 5.2493E-10 -1.6138E-11 2.1193E-13 S13 -3.2178 2.3653E-04 1.9404E-05 -9.5573E-07 4.4926E-07 -5.8573E-08 2.3132E-09 -3.8477E-11 S14 -132.3455 -1.1984E-03 2.0734E-04 -1.6244E-05 6.7567E-07 4.4360E-08 -5.4141E-09 1.5930E-10

[0143] Table 5

[0144] Table 6 below shows the optical length TTL of the optical lens of Example 2 (i.e., the distance from the center of the object-side surface S1 of the first lens L1 to the imaging surface IMA on the optical axis), the focal length F of the entire optical lens group, the maximum clear aperture D of the object-side surface S1 of the first lens L1 corresponding to the maximum field of view FOV of the optical lens, the image height H corresponding to the maximum field of view FOV of the optical lens, the maximum field of view FOV of the optical lens, the optical back focus BFL of the optical lens (the distance from the center of the image-side surface S14 of the seventh lens L7 of the optical lens to the imaging surface IMA of the optical lens on the optical axis), the lens group length TL of the optical lens (the distance from the center of the object-side surface S1 of the first lens L1 to the center of the image-side surface S14 of the seventh lens L7 on the optical axis), the focal length F3 of the third lens L3, the focal length F4 of the fourth lens L4, the focal length F5 of the fifth lens L5, and the focal length F6 of the sixth lens L6.

[0145] TTL(mm) 31.3877 TL(mm) 26.6798 F(mm) 4.0583 F3(mm) 19.5887 D(mm) 12.8407 F4(mm) 12.5236 H(mm) 9.0290 F5(mm) 8.9401 FOV(°) 140 F6(mm) -4.2939 BFL(mm) 4.7079

[0146] Table 6

[0147] Example 3

[0148] The following reference Figure 3 Describe the optical lens according to Example 3 of the present application. Figure 3 is a schematic diagram showing the structure of an optical lens according to Example 3 of the present application.

[0149] like Figure 3 As shown, the optical lens includes, in order from the object side to the image side along the optical axis: a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7.

[0150] The first lens L1 is a meniscus lens with negative refractive power, whose object-side surface S1 is convex, and whose image-side surface S2 is concave. Both the object-side surface S1 and the image-side surface S2 of the first lens L1 are spherical surfaces.

[0151] The second lens L2 is a meniscus lens with positive refractive power, whose object-side surface S3 is a concave surface, and whose image-side surface S4 is a convex surface. Both the object-side surface S3 and the image-side surface S4 of the second lens L2 are aspherical surfaces.

[0152] The third lens L3 is a biconvex lens with positive refractive power, wherein the object-side surface S5 thereof is a convex surface, the image-side surface S6 thereof is a convex surface, and both the object-side surface S5 and the image-side surface S6 of the third lens L3 are spherical surfaces.

[0153] The fourth lens L4 is a biconvex lens with positive refractive power, wherein the object-side surface S8 thereof is a convex surface, the image-side surface S9 thereof is a convex surface, and both the object-side surface S8 and the image-side surface S9 of the fourth lens L4 are spherical surfaces.

[0154] The fifth lens L5 is a biconvex lens with positive refractive power, wherein the object-side surface S10 thereof is a convex surface, the image-side surface S11 thereof is a convex surface, and both the object-side surface S10 and the image-side surface S11 of the fifth lens L5 are spherical surfaces.

[0155] The sixth lens L6 is a biconcave lens with negative refractive power, wherein the object-side surface S11 thereof is a concave surface, the image-side surface S12 thereof is a concave surface, and both the object-side surface S11 and the image-side surface S12 of the sixth lens L6 are spherical surfaces.

[0156] The seventh lens L7 is a biconvex lens with positive refractive power, wherein the object-side surface S13 thereof is a convex surface, the image-side surface S14 thereof is a convex surface, and both the object-side surface S13 and the image-side surface S14 of the seventh lens L7 are aspherical surfaces.

[0157] In this embodiment, the fifth lens L5 and the sixth lens L6 are combined into a cemented lens.

[0158] Optionally, the optical lens may further include a filter L8 and / or a protective glass L8 having an object side surface S15 and an image side surface S16. The filter L8 may be used to correct color deviation, and the protective glass L8 may be used to protect the image sensor chip located at the imaging surface IMA. Light from the object passes through each surface S1 to S16 in sequence and is finally imaged on the imaging surface IMA.

[0159] In the optical lens of this embodiment, the aperture STO can be arranged between the third lens L3 and the fourth lens L4 to further improve the imaging quality.

[0160] Table 7 shows a basic parameter table of the optical lens of Example 3, wherein the units of the radius of curvature and thickness / distance are both millimeters (mm).

[0161]

[0162]

[0163] Table 7

[0164] Table 8 below shows the cone coefficient k and the higher-order coefficients A, B, C, D, E, F and G that can be used for the aspherical lens surfaces S3, S4, S13 and S14 in Example 3.

[0165] Face number k A B C D E F G S3 1.4743 -1.4187E-04 9.3990E-06 -1.4293E-06 2.3980E-07 -1.9000E-08 7.5766E-10 -1.1690E-11 S4 -1.0840 -5.6427E-05 3.4074E-06 2.7449E-08 -1.2560E-08 7.9147E-10 -2.0674E-11 2.0481E-13 S13 -3.0925 1.1789E-04 3.2921E-05 -4.4977E-06 9.2674E-07 -8.9974E-08 4.4465E-09 -8.6607E-11 S14 -221.9613 -2.6637E-03 2.6839E-04 -1.8173E-05 4.4759E-07 5.2332E-08 -4.2957E-09 1.0208E-10

[0166] Table 8

[0167] Table 9 below shows the optical length TTL of the optical lens of Example 3 (i.e., the distance from the center of the object-side surface S1 of the first lens L1 to the imaging surface IMA on the optical axis), the focal length value F of the entire optical lens group, the maximum clear aperture D of the object-side surface S1 of the first lens L1 corresponding to the maximum field of view FOV of the optical lens, the image height H corresponding to the maximum field of view FOV of the optical lens, the maximum field of view FOV of the optical lens, the optical back focus BFL of the optical lens (the distance from the center of the image-side surface S14 of the seventh lens L7 of the optical lens to the imaging surface IMA of the optical lens on the optical axis), the lens group length TL of the optical lens (the distance from the center of the object-side surface S1 of the first lens L1 to the center of the image-side surface S14 of the seventh lens L7 on the optical axis), the focal length value F3 of the third lens L3, the focal length value F4 of the fourth lens L4, the focal length value F5 of the fifth lens L5, and the focal length value F6 of the sixth lens L6.

[0168] TTL(mm) 32.0001 TL(mm) 27.3678 F(mm) 4.00353 F3(mm) 20.888 D(mm) 14.0204 F4(mm) 12.3 H(mm) 9.34951 F5(mm) 10.485 FOV(°) 140 F6(mm) -4.6207 BFL(mm) 4.6323

[0169] Table 9

[0170] Example 4

[0171] The following reference Figure 4 Describe the optical lens according to Example 4 of the present application. Figure 4 is a schematic diagram showing the structure of an optical lens according to Example 4 of the present application.

[0172] like Figure 4 As shown, the optical lens includes, in order from the object side to the image side along the optical axis: a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7.

[0173] The first lens L1 is a meniscus lens with negative refractive power, whose object-side surface S1 is convex, and whose image-side surface S2 is concave. Both the object-side surface S1 and the image-side surface S2 of the first lens L1 are spherical surfaces.

[0174] The second lens L2 is a meniscus lens with positive refractive power, whose object-side surface S3 is a concave surface, and whose image-side surface S4 is a convex surface. Both the object-side surface S3 and the image-side surface S4 of the second lens L2 are aspherical surfaces.

[0175] The third lens L3 is a biconvex lens with positive refractive power, wherein the object-side surface S5 thereof is a convex surface, the image-side surface S6 thereof is a convex surface, and both the object-side surface S5 and the image-side surface S6 of the third lens L3 are spherical surfaces.

[0176] The fourth lens L4 is a biconvex lens with positive refractive power, wherein the object-side surface S8 thereof is a convex surface, the image-side surface S9 thereof is a convex surface, and both the object-side surface S8 and the image-side surface S9 of the fourth lens L4 are spherical surfaces.

[0177] The fifth lens L5 is a biconvex lens with positive refractive power, wherein the object-side surface S10 thereof is a convex surface, the image-side surface S11 thereof is a convex surface, and both the object-side surface S10 and the image-side surface S11 of the fifth lens L5 are spherical surfaces.

[0178] The sixth lens L6 is a biconcave lens with negative refractive power, wherein the object-side surface S11 thereof is a concave surface, the image-side surface S12 thereof is a concave surface, and both the object-side surface S11 and the image-side surface S12 of the sixth lens L6 are spherical surfaces.

[0179] The seventh lens L7 is a biconvex lens with positive refractive power, wherein the object-side surface S13 thereof is a convex surface, the image-side surface S14 thereof is a convex surface, and both the object-side surface S13 and the image-side surface S14 of the seventh lens L7 are aspherical surfaces.

[0180] In this embodiment, the fifth lens L5 and the sixth lens L6 are combined into a cemented lens.

[0181] Optionally, the optical lens may further include a filter L8 and / or a protective glass L8 having an object side surface S15 and an image side surface S16. The filter L8 may be used to correct color deviation, and the protective glass L8 may be used to protect the image sensor chip located at the imaging surface IMA. Light from the object passes through each surface S1 to S16 in sequence and is finally imaged on the imaging surface IMA.

[0182] In the optical lens of this embodiment, the aperture STO can be arranged between the third lens L3 and the fourth lens L4 to further improve the imaging quality.

[0183] Table 10 shows the basic parameter table of the optical lens of Example 4, wherein the units of the radius of curvature and thickness / distance are both millimeters (mm).

[0184]

[0185]

[0186] Table 10

[0187] The following Table 11 shows the cone coefficient k and the higher-order coefficients A, B, C, D, E, F and G that can be used for the aspherical lens surfaces S3, S4, S13 and S14 in Example 4.

[0188] Face number k A B C D E F G S3 1.6363 -2.2697E-04 9.3138E-06 -7.5984E-07 1.3508E-07 -1.2029E-08 5.8020E-10 -1.0536E-11 S4 -1.0739 -6.7842E-05 3.7560E-06 8.3653E-09 -9.8000E-09 6.4736E-10 -1.6635E-11 1.6097E-13 S13 -4.0906 2.0986E-04 2.8522E-05 -1.7884E-06 4.5026E-07 -4.6586E-08 2.4352E-09 -4.8409E-11 S14 -200.0000 -1.6612E-03 2.7079E-04 -1.7987E-05 4.7030E-07 5.1945E-08 -4.4923E-09 1.1310E-10

[0189] Table 11

[0190] Table 12 below shows the optical length TTL of the optical lens of Example 4 (i.e., the distance from the center of the object-side surface S1 of the first lens L1 to the imaging surface IMA on the optical axis), the focal length F of the entire optical lens group, the maximum clear aperture D of the object-side surface S1 of the first lens L1 corresponding to the maximum field of view FOV of the optical lens, the image height H corresponding to the maximum field of view FOV of the optical lens, the maximum field of view FOV of the optical lens, the optical back focus BFL of the optical lens (the distance from the center of the image-side surface S14 of the seventh lens L7 of the optical lens to the imaging surface IMA of the optical lens on the optical axis), the lens group length TL of the optical lens (the distance from the center of the object-side surface S1 of the first lens L1 to the center of the image-side surface S14 of the seventh lens L7 on the optical axis), the focal length F3 of the third lens L3, the focal length F4 of the fourth lens L4, the focal length F5 of the fifth lens L5, and the focal length F6 of the sixth lens L6.

[0191] TTL(mm) 33.0857 TL(mm) 27.4045 F(mm) 3.9891 F3(mm) 22.7504 D(mm) 12.5597 F4(mm) 12.1312 H(mm) 9.5599 F5(mm) 10.1036 FOV(°) 140 F6(mm) -4.4905 BFL(mm) 5.6812

[0192] Table 12

[0193] Example 5

[0194] The following reference Figure 5 Describe the optical lens according to Example 5 of the present application. Figure 5 is a schematic diagram showing the structure of an optical lens according to Example 5 of the present application.

[0195] like Figure 5 As shown, the optical lens includes, in order from the object side to the image side along the optical axis: a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7.

[0196] The first lens L1 is a meniscus lens with negative refractive power, whose object-side surface S1 is convex, and whose image-side surface S2 is concave. Both the object-side surface S1 and the image-side surface S2 of the first lens L1 are spherical surfaces.

[0197] The second lens L2 is a meniscus lens with negative refractive power, whose object-side surface S3 is a concave surface, and whose image-side surface S4 is a convex surface. Both the object-side surface S3 and the image-side surface S4 of the second lens L2 are aspherical surfaces.

[0198] The third lens L3 is a meniscus lens with positive refractive power, whose object-side surface S5 is convex, and whose image-side surface S6 is concave. Both the object-side surface S5 and the image-side surface S6 of the third lens L3 are spherical surfaces.

[0199] The fourth lens L4 is a biconvex lens with positive refractive power, whose object-side surface S8 is a convex surface, and whose image-side surface S9 is a convex surface. Both the object-side surface S8 and the image-side surface S9 of the fourth lens L4 are aspherical surfaces.

[0200] The fifth lens L5 is a biconvex lens with positive refractive power, wherein the object-side surface S10 thereof is a convex surface, the image-side surface S11 thereof is a convex surface, and both the object-side surface S10 and the image-side surface S11 of the fifth lens L5 are spherical surfaces.

[0201] The sixth lens L6 is a meniscus lens with negative refractive power, whose object-side surface S11 is a concave surface, and whose image-side surface S12 is a convex surface. Both the object-side surface S11 and the image-side surface S12 of the sixth lens L6 are spherical surfaces.

[0202] The seventh lens L7 is a meniscus lens with positive refractive power, whose object-side surface S13 is convex, and whose image-side surface S14 is concave. Both the object-side surface S13 and the image-side surface S14 of the seventh lens L7 are aspherical surfaces.

[0203] In this embodiment, the fifth lens L5 and the sixth lens L6 are combined into a cemented lens.

[0204] Optionally, the optical lens may further include a filter L8 and / or a protective glass L8 having an object side surface S15 and an image side surface S16. The filter L8 may be used to correct color deviation, and the protective glass L8 may be used to protect the image sensor chip located at the imaging surface IMA. Light from the object passes through each surface S1 to S16 in sequence and is finally imaged on the imaging surface IMA.

[0205] In the optical lens of this embodiment, the aperture STO can be arranged between the third lens L3 and the fourth lens L4 to further improve the imaging quality.

[0206] Table 13 shows the basic parameter table of the optical lens of Example 5, wherein the units of the radius of curvature and thickness / distance are both millimeters (mm).

[0207]

[0208] Table 13

[0209] Table 14 below shows the cone coefficient k and the higher-order coefficients A, B, C, D, E, F and G that can be used for the aspherical lens surfaces S3, S4, S8, S9, S13 and S14 in Example 5.

[0210] Face number k A B C D E F G S3 -0.5957 4.0390E-04 -4.3642E-06 1.7874E-06 -2.0450E-07 1.2700E-08 -3.8529E-10 4.3195E-12 S4 -2.2779 2.4454E-04 3.3539E-07 2.9720E-07 -1.9963E-08 7.9086E-10 -1.2936E-11 7.3297E-15 S8 1.7704 -1.2450E-04 5.6747E-05 -1.7547E-05 2.1012E-06 -1.4564E-07 5.2612E-09 -8.1970E-11 S9 -59.1945 -7.9032E-04 1.1506E-04 -9.3715E-06 6.0082E-07 -1.8372E-08 -3.9824E-11 1.2062E-11 S13 -14.0684 2.0557E-04 -1.5254E-04 4.4282E-06 -2.6851E-07 1.2460E-10 7.2407E-10 -1.3247E-11 S14 -15.0970 -8.2608E-04 -8.4856E-05 3.6054E-06 -2.6968E-07 1.1097E-08 1.3088E-10 -8.7242E-12

[0211] Table 14

[0212] Table 15 below shows the optical length TTL of the optical lens of Example 5 (i.e., the distance from the center of the object-side surface S1 of the first lens L1 to the imaging surface IMA on the optical axis), the focal length F of the entire optical lens group, the maximum clear aperture D of the object-side surface S1 of the first lens L1 corresponding to the maximum field of view FOV of the optical lens, the image height H corresponding to the maximum field of view FOV of the optical lens, the maximum field of view FOV of the optical lens, the optical back focus BFL of the optical lens (the distance from the center of the image-side surface S14 of the seventh lens L7 of the optical lens to the imaging surface IMA of the optical lens on the optical axis), the lens group length TL of the optical lens (the distance from the center of the object-side surface S1 of the first lens L1 to the center of the image-side surface S14 of the seventh lens L7 on the optical axis), the focal length F3 of the third lens L3, the focal length F4 of the fourth lens L4, the focal length F5 of the fifth lens L5, and the focal length F6 of the sixth lens L6.

[0213] TTL(mm) 32.2187 TL(mm) 27.7649 F(mm) 4.0522 F3(mm) 25.3956 D(mm) 12.8343 F4(mm) 11.3608 H(mm) 9.8932 F5(mm) 8.0009 FOV(°) 140 F6(mm) -7.1157 BFL(mm) 4.4538

[0214] Table 15

[0215] Example 6

[0216] The following reference Figure 6 Describe the optical lens according to Example 6 of the present application. Figure 6 is a schematic diagram showing the structure of an optical lens according to Example 6 of the present application.

[0217] like Figure 6 As shown, the optical lens includes, in order from the object side to the image side along the optical axis: a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7.

[0218] The first lens L1 is a meniscus lens with negative refractive power, whose object-side surface S1 is convex, and whose image-side surface S2 is concave. Both the object-side surface S1 and the image-side surface S2 of the first lens L1 are spherical surfaces.

[0219] The second lens L2 is a meniscus lens with negative refractive power, whose object-side surface S3 is a concave surface, and whose image-side surface S4 is a convex surface. Both the object-side surface S3 and the image-side surface S4 of the second lens L2 are aspherical surfaces.

[0220] The third lens L3 is a meniscus lens with positive refractive power, whose object-side surface S5 is convex, and whose image-side surface S6 is concave. Both the object-side surface S5 and the image-side surface S6 of the third lens L3 are spherical surfaces.

[0221] The fourth lens L4 is a biconvex lens with positive refractive power, whose object-side surface S8 is a convex surface, and whose image-side surface S9 is a convex surface. Both the object-side surface S8 and the image-side surface S9 of the fourth lens L4 are aspherical surfaces.

[0222] The fifth lens L5 is a biconvex lens with positive refractive power, wherein the object-side surface S10 thereof is a convex surface, the image-side surface S11 thereof is a convex surface, and both the object-side surface S10 and the image-side surface S11 of the fifth lens L5 are spherical surfaces.

[0223] The sixth lens L6 is a meniscus lens with negative refractive power, wherein the object-side surface S11 thereof is a concave surface, the image-side surface S12 thereof is a convex surface, and both the object-side surface S11 and the image-side surface S12 of the sixth lens L6 are spherical surfaces.

[0224] The seventh lens L7 is a meniscus lens with positive refractive power, whose object-side surface S13 is convex, and whose image-side surface S14 is concave. Both the object-side surface S13 and the image-side surface S14 of the seventh lens L7 are aspherical surfaces.

[0225] In this embodiment, the fifth lens L5 and the sixth lens L6 are combined into a cemented lens.

[0226] Optionally, the optical lens may further include a filter L8 and / or a protective glass L8 having an object side surface S15 and an image side surface S16. The filter L8 may be used to correct color deviation, and the protective glass L8 may be used to protect the image sensor chip located at the imaging surface IMA. Light from the object passes through each surface S1 to S16 in sequence and is finally imaged on the imaging surface IMA.

[0227] In the optical lens of this embodiment, the aperture STO can be arranged between the third lens L3 and the fourth lens L4 to further improve the imaging quality.

[0228] Table 16 shows the basic parameter table of the optical lens of Example 6, wherein the units of the radius of curvature and thickness / distance are both millimeters (mm).

[0229]

[0230] Table 16

[0231] Table 17 below shows the cone coefficient k and the higher-order coefficients A, B, C, D, E, F and G that can be used for the aspherical lens surfaces S3, S4, S8, S9, S13 and S14 in Example 6.

[0232] Face number k A B C D E F G S3 -0.6091 4.5150E-04 -8.1755E-07 1.7065E-06 -2.0567E-07 1.2565E-08 -3.9046E-10 4.6938E-12 S4 -1.8263 6.9928E-05 6.8789E-07 2.4503E-07 -2.0932E-08 8.9349E-10 -1.8972E-11 1.3604E-13 S8 1.6400 -1.8955E-04 6.7087E-05 -1.7272E-05 2.0820E-06 -1.4521E-07 5.3397E-09 -8.3086E-11 S9 -96.3605 -4.0411E-04 1.1263E-04 -1.0369E-05 6.8871E-07 -1.4033E-08 -5.3734E-10 2.5610E-11 S13 -8.9239 2.1871E-03 -1.0165E-04 5.3766E-06 -2.2452E-07 1.8766E-09 2.6737E-10 -7.1689E-12 S14 -34.9739 4.0942E-04 -4.1072E-05 3.9322E-06 -2.6377E-07 8.3391E-09 4.0165E-11 -4.0334E-12

[0233] Table 17

[0234] Table 18 below shows the optical length TTL of the optical lens of Example 6 (i.e., the distance from the center of the object-side surface S1 of the first lens L1 to the imaging surface IMA on the optical axis), the focal length value F of the entire optical lens group, the maximum clear aperture D of the object-side surface S1 of the first lens L1 corresponding to the maximum field of view FOV of the optical lens, the image height H corresponding to the maximum field of view FOV of the optical lens, the maximum field of view FOV of the optical lens, the optical back focus BFL of the optical lens (the distance from the center of the image-side surface S14 of the seventh lens L7 of the optical lens to the imaging surface IMA of the optical lens on the optical axis), the lens group length TL of the optical lens (the distance from the center of the object-side surface S1 of the first lens L1 to the center of the image-side surface S14 of the seventh lens L7 on the optical axis), the focal length value F3 of the third lens L3, the focal length value F4 of the fourth lens L4, the focal length value F5 of the fifth lens L5, and the focal length value F6 of the sixth lens L6.

[0235]

[0236]

[0237] Table 18

[0238] Example 7

[0239] The following reference Figure 7 Describe the optical lens according to Example 7 of the present application. Figure 7 is a schematic diagram showing the structure of an optical lens according to Example 7 of the present application.

[0240] like Figure 7 As shown, the optical lens includes, in order from the object side to the image side along the optical axis: a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7.

[0241] The first lens L1 is a meniscus lens with negative refractive power, whose object-side surface S1 is convex, and whose image-side surface S2 is concave. Both the object-side surface S1 and the image-side surface S2 of the first lens L1 are spherical surfaces.

[0242] The second lens L2 is a meniscus lens with negative refractive power, whose object-side surface S3 is a concave surface, and whose image-side surface S4 is a convex surface. Both the object-side surface S3 and the image-side surface S4 of the second lens L2 are aspherical surfaces.

[0243] The third lens L3 is a meniscus lens with positive refractive power, whose object-side surface S5 is convex, and whose image-side surface S6 is concave. Both the object-side surface S5 and the image-side surface S6 of the third lens L3 are spherical surfaces.

[0244] The fourth lens L4 is a biconvex lens with positive refractive power, wherein the object-side surface S8 thereof is a convex surface, the image-side surface S9 thereof is a convex surface, and both the object-side surface S8 and the image-side surface S9 of the fourth lens L4 are spherical surfaces.

[0245] The fifth lens L5 is a biconvex lens with positive refractive power, wherein the object-side surface S10 thereof is a convex surface, the image-side surface S11 thereof is a convex surface, and both the object-side surface S10 and the image-side surface S11 of the fifth lens L5 are spherical surfaces.

[0246] The sixth lens L6 is a meniscus lens with negative refractive power, wherein the object-side surface S11 thereof is a concave surface, the image-side surface S12 thereof is a convex surface, and both the object-side surface S11 and the image-side surface S12 of the sixth lens L6 are spherical surfaces.

[0247] The seventh lens L7 is a meniscus lens with positive refractive power, whose object-side surface S13 is concave, and whose image-side surface S14 is convex. Both the object-side surface S13 and the image-side surface S14 of the seventh lens L7 are aspherical surfaces.

[0248] In this embodiment, the fifth lens L5 and the sixth lens L6 are combined into a cemented lens.

[0249] Optionally, the optical lens may further include a filter L8 and / or a protective glass L8 having an object side surface S15 and an image side surface S16. The filter L8 may be used to correct color deviation, and the protective glass L8 may be used to protect the image sensor chip located at the imaging surface IMA. Light from the object passes through each surface S1 to S16 in sequence and is finally imaged on the imaging surface IMA.

[0250] In the optical lens of this embodiment, the aperture STO can be arranged between the third lens L3 and the fourth lens L4 to further improve the imaging quality.

[0251] Table 19 shows the basic parameter table of the optical lens of Example 7, wherein the units of the radius of curvature and thickness / distance are both millimeters (mm).

[0252]

[0253]

[0254] Table 19

[0255] The following Table 20 shows the cone coefficient k and the higher-order coefficients A, B, C, D, E, F and G that can be used for the aspherical lens surfaces S3, S4, S13 and S14 in Example 7.

[0256]

[0257] Table 20

[0258] Table 21 below shows the optical length TTL of the optical lens of Example 7 (i.e., the distance from the center of the object-side surface S1 of the first lens L1 to the imaging surface IMA on the optical axis), the focal length F of the entire optical lens group, the maximum clear aperture D of the object-side surface S1 of the first lens L1 corresponding to the maximum field of view FOV of the optical lens, the image height H corresponding to the maximum field of view FOV of the optical lens, the maximum field of view FOV of the optical lens, the optical back focus BFL of the optical lens (the distance from the center of the image-side surface S14 of the seventh lens L7 of the optical lens to the imaging surface IMA of the optical lens on the optical axis), the lens group length TL of the optical lens (the distance from the center of the object-side surface S1 of the first lens L1 to the center of the image-side surface S14 of the seventh lens L7 on the optical axis), the focal length F3 of the third lens L3, the focal length F4 of the fourth lens L4, the focal length F5 of the fifth lens L5, and the focal length F6 of the sixth lens L6.

[0259] TTL(mm) 31.0029 TL(mm) 25.8926 F(mm) 4.0704 F3(mm) 28.0012 D(mm) 11.7993 F4(mm) 10.8825 H(mm) 9.2709 F5(mm) 8.0025 FOV(°) 140 F6(mm) -6.7304 BFL(mm) 5.1103

[0260] Table 21

[0261] Example 8

[0262] The following reference Figure 8 Describe the optical lens according to Example 8 of the present application. Figure 8 is a schematic diagram showing the structure of an optical lens according to Example 8 of the present application.

[0263] like Figure 8 As shown, the optical lens includes, in order from the object side to the image side along the optical axis: a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7.

[0264] The first lens L1 is a meniscus lens with negative refractive power, whose object-side surface S1 is convex, and whose image-side surface S2 is concave. Both the object-side surface S1 and the image-side surface S2 of the first lens L1 are spherical surfaces.

[0265] The second lens L2 is a meniscus lens with negative refractive power, whose object-side surface S3 is a concave surface, and whose image-side surface S4 is a convex surface. Both the object-side surface S3 and the image-side surface S4 of the second lens L2 are aspherical surfaces.

[0266] The third lens L3 is a meniscus lens with positive refractive power, whose object-side surface S5 is convex, and whose image-side surface S6 is concave. Both the object-side surface S5 and the image-side surface S6 of the third lens L3 are spherical surfaces.

[0267] The fourth lens L4 is a biconvex lens with positive refractive power, wherein the object-side surface S8 thereof is a convex surface, the image-side surface S9 thereof is a convex surface, and both the object-side surface S8 and the image-side surface S9 of the fourth lens L4 are spherical surfaces.

[0268] The fifth lens L5 is a biconvex lens with positive refractive power, wherein the object-side surface S10 thereof is a convex surface, the image-side surface S11 thereof is a convex surface, and both the object-side surface S10 and the image-side surface S11 of the fifth lens L5 are spherical surfaces.

[0269] The sixth lens L6 is a meniscus lens with negative refractive power, wherein the object-side surface S11 thereof is a concave surface, the image-side surface S12 thereof is a convex surface, and both the object-side surface S11 and the image-side surface S12 of the sixth lens L6 are spherical surfaces.

[0270] The seventh lens L7 is a meniscus lens with positive refractive power, whose object-side surface S13 is concave, and whose image-side surface S14 is convex. Both the object-side surface S13 and the image-side surface S14 of the seventh lens L7 are aspherical surfaces.

[0271] In this embodiment, the fifth lens L5 and the sixth lens L6 are combined into a cemented lens.

[0272] Optionally, the optical lens may further include a filter L8 and / or a protective glass L8 having an object side surface S15 and an image side surface S16. The filter L8 may be used to correct color deviation, and the protective glass L8 may be used to protect the image sensor chip located at the imaging surface IMA. Light from the object passes through each surface S1 to S16 in sequence and is finally imaged on the imaging surface IMA.

[0273] In the optical lens of this embodiment, the aperture STO can be arranged between the third lens L3 and the fourth lens L4 to further improve the imaging quality.

[0274] Table 22 shows the basic parameter table of the optical lens of Example 8, wherein the units of the radius of curvature and thickness / distance are both millimeters (mm).

[0275]

[0276]

[0277] Table 22

[0278] The following Table 23 shows the cone coefficient k and the higher-order coefficients A, B, C, D, E, F and G that can be used for the aspherical lens surfaces S3, S4, S13 and S14 in Example 8.

[0279]

[0280] Table 23

[0281] Table 24 below shows the optical length TTL of the optical lens of Example 8 (i.e., the distance from the center of the object-side surface S1 of the first lens L1 to the imaging surface IMA on the optical axis), the focal length F of the entire optical lens group, the maximum clear aperture D of the object-side surface S1 of the first lens L1 corresponding to the maximum field of view FOV of the optical lens, the image height H corresponding to the maximum field of view FOV of the optical lens, the maximum field of view FOV of the optical lens, the optical back focus BFL of the optical lens (the distance from the center of the image-side surface S14 of the seventh lens L7 of the optical lens to the imaging surface IMA of the optical lens on the optical axis), the lens group length TL of the optical lens (the distance from the center of the object-side surface S1 of the first lens L1 to the center of the image-side surface S14 of the seventh lens L7 on the optical axis), the focal length F3 of the third lens L3, the focal length F4 of the fourth lens L4, the focal length F5 of the fifth lens L5, and the focal length F6 of the sixth lens L6.

[0282] TTL(mm) 31.0016 TL(mm) 25.8675 F(mm) 4.0784 F3(mm) 28.1821 D(mm) 12.1551 F4(mm) 10.9355 H(mm) 9.2036 F5(mm) 7.9907 FOV(°) 140 F6(mm) -6.8386 BFL(mm) 5.1341

[0283] Table 24

[0284] Example 9

[0285] The following reference Fig. 9 Describe the optical lens according to Example 9 of the present application. Fig. 9 is a schematic diagram showing the structure of an optical lens according to Example 9 of the present application.

[0286] like Fig. 9 As shown, the optical lens includes, in order from the object side to the image side along the optical axis: a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7.

[0287] The first lens L1 is a meniscus lens with negative refractive power, whose object-side surface S1 is convex, and whose image-side surface S2 is concave. Both the object-side surface S1 and the image-side surface S2 of the first lens L1 are spherical surfaces.

[0288] The second lens L2 is a meniscus lens with negative refractive power, whose object-side surface S3 is a concave surface, and whose image-side surface S4 is a convex surface. Both the object-side surface S3 and the image-side surface S4 of the second lens L2 are aspherical surfaces.

[0289] The third lens L3 is a meniscus lens with positive refractive power, whose object-side surface S5 is convex, and whose image-side surface S6 is concave. Both the object-side surface S5 and the image-side surface S6 of the third lens L3 are spherical surfaces.

[0290] The fourth lens L4 is a biconvex lens with positive refractive power, wherein the object-side surface S8 thereof is a convex surface, the image-side surface S9 thereof is a convex surface, and both the object-side surface S8 and the image-side surface S9 of the fourth lens L4 are spherical surfaces.

[0291] The fifth lens L5 is a biconvex lens with positive refractive power, wherein the object-side surface S10 thereof is a convex surface, the image-side surface S11 thereof is a convex surface, and both the object-side surface S10 and the image-side surface S11 of the fifth lens L5 are spherical surfaces.

[0292] The sixth lens L6 is a meniscus lens with negative refractive power, wherein the object-side surface S11 thereof is a concave surface, the image-side surface S12 thereof is a convex surface, and both the object-side surface S11 and the image-side surface S12 of the sixth lens L6 are spherical surfaces.

[0293] The seventh lens L7 is a meniscus lens with negative refractive power, whose object-side surface S13 is convex, and whose image-side surface S14 is concave. Both the object-side surface S13 and the image-side surface S14 of the seventh lens L7 are aspherical surfaces.

[0294] In this embodiment, the fifth lens L5 and the sixth lens L6 are combined into a cemented lens.

[0295] Optionally, the optical lens may further include a filter L8 and / or a protective glass L8 having an object side surface S15 and an image side surface S16. The filter L8 may be used to correct color deviation, and the protective glass L8 may be used to protect the image sensor chip located at the imaging surface IMA. Light from the object passes through each surface S1 to S16 in sequence and is finally imaged on the imaging surface IMA.

[0296] In the optical lens of this embodiment, the aperture STO can be arranged between the third lens L3 and the fourth lens L4 to further improve the imaging quality.

[0297] Table 25 shows the basic parameter table of the optical lens of Example 9, wherein the units of the radius of curvature and thickness / distance are both millimeters (mm).

[0298]

[0299] Table 25

[0300] The following Table 26 shows the cone coefficient k and the higher-order coefficients A, B, C, D, E, F and G that can be used for the aspherical lens surfaces S3, S4, S13 and S14 in Example 9.

[0301] Face number k A B C D E F G S3 -0.5577 -0.00018714 0.000100445 -2.18361E-05 3.43419E-06 -2.98238E-07 1.35969E-08 -2.53372E-10 S4 -0.8699 0.000310007 -3.84481E-05 1.07807E-05 -1.25727E-06 8.41332E-08 -2.97016E-09 4.33315E-11 S13 108.426 -0.0064430 0.000494761 -0.000114816 2.14609E-05 -2.00278E-06 1.00904E-07 -2.18071E-09 S14 200.0 -0.003598 0.000187167 -9.13174E-06 2.68951E-06 -2.79732E-07 1.59899E-08 -4.15607E-10

[0302] Table 26

[0303] Table 27 below shows the optical length TTL of the optical lens of Example 9 (i.e., the distance from the center of the object-side surface S1 of the first lens L1 to the imaging surface IMA on the optical axis), the focal length F of the entire optical lens group, the maximum clear aperture D of the object-side surface S1 of the first lens L1 corresponding to the maximum field of view FOV of the optical lens, the image height H corresponding to the maximum field of view FOV of the optical lens, the maximum field of view FOV of the optical lens, the optical back focus BFL of the optical lens (the distance from the center of the image-side surface S14 of the seventh lens L7 of the optical lens to the imaging surface IMA of the optical lens on the optical axis), the lens group length TL of the optical lens (the distance from the center of the object-side surface S1 of the first lens L1 to the center of the image-side surface S14 of the seventh lens L7 on the optical axis), the focal length F3 of the third lens L3, the focal length F4 of the fourth lens L4, the focal length F5 of the fifth lens L5, and the focal length F6 of the sixth lens L6.

[0304] TTL(mm) 31.0001 TL(mm) 26.092 F(mm) 4.1007 F3(mm) 24.9029 D(mm) 13.427 F4(mm) 10.229 H(mm) 8.6916 F5(mm) 9.6869 FOV(°) 140 F6(mm) -12.9412 BFL(mm) 4.9081

[0305] Table 27

[0306] Example 10

[0307] The following reference Fig.10 An optical lens according to Example 10 of the present application is described. Fig.10 is a schematic diagram showing the structure of an optical lens according to Example 10 of the present application.

[0308] like Fig.10 As shown, the optical lens includes, in order from the object side to the image side along the optical axis: a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7.

[0309] The first lens L1 is a meniscus lens with negative refractive power, whose object-side surface S1 is convex, and whose image-side surface S2 is concave. Both the object-side surface S1 and the image-side surface S2 of the first lens L1 are spherical surfaces.

[0310] The second lens L2 is a meniscus lens with negative refractive power, whose object-side surface S3 is a concave surface, and whose image-side surface S4 is a convex surface. Both the object-side surface S3 and the image-side surface S4 of the second lens L2 are aspherical surfaces.

[0311] The third lens L3 is a meniscus lens with positive refractive power, whose object-side surface S5 is convex, and whose image-side surface S6 is concave. Both the object-side surface S5 and the image-side surface S6 of the third lens L3 are spherical surfaces.

[0312] The fourth lens L4 is a biconvex lens with positive refractive power, whose object-side surface S8 is a convex surface, and whose image-side surface S9 is a convex surface. Both the object-side surface S8 and the image-side surface S9 of the fourth lens L4 are aspherical surfaces.

[0313] The fifth lens L5 is a biconvex lens with positive refractive power, wherein the object-side surface S10 thereof is a convex surface, the image-side surface S11 thereof is a convex surface, and both the object-side surface S10 and the image-side surface S11 of the fifth lens L5 are spherical surfaces.

[0314] The sixth lens L6 is a meniscus lens with negative refractive power, wherein the object-side surface S11 thereof is a concave surface, the image-side surface S12 thereof is a convex surface, and both the object-side surface S11 and the image-side surface S12 of the sixth lens L6 are spherical surfaces.

[0315] The seventh lens L7 is a meniscus lens with negative refractive power, whose object-side surface S13 is concave, and whose image-side surface S14 is convex. Both the object-side surface S13 and the image-side surface S14 of the seventh lens L7 are aspherical surfaces.

[0316] In this embodiment, the fifth lens L5 and the sixth lens L6 are combined into a cemented lens.

[0317] Optionally, the optical lens may further include a filter L8 and / or a protective glass L8 having an object side surface S15 and an image side surface S16. The filter L8 may be used to correct color deviation, and the protective glass L8 may be used to protect the image sensor chip located at the imaging surface IMA. Light from the object passes through each surface S1 to S16 in sequence and is finally imaged on the imaging surface IMA.

[0318] In the optical lens of this embodiment, the aperture STO can be arranged between the third lens L3 and the fourth lens L4 to further improve the imaging quality.

[0319] Table 28 shows the basic parameter table of the optical lens of Example 10, wherein the units of the radius of curvature and thickness / distance are both millimeters (mm).

[0320]

[0321] The following Table 29 shows the cone coefficient k and the higher-order coefficients A, B, C, D, E, F and G that can be used for the aspherical lens surfaces S3, S4, S8, S9, S13 and S14 in Example 10.

[0322]

[0323] Table 29

[0324] Table 30 below shows the optical length TTL of the optical lens of Example 10 (i.e., the distance from the center of the object-side surface S1 of the first lens L1 to the imaging surface IMA on the optical axis), the focal length F of the entire optical lens group, the maximum clear aperture D of the object-side surface S1 of the first lens L1 corresponding to the maximum field of view FOV of the optical lens, the image height H corresponding to the maximum field of view FOV of the optical lens, the maximum field of view FOV of the optical lens, the optical back focus BFL of the optical lens (the distance from the center of the image-side surface S14 of the seventh lens L7 of the optical lens to the imaging surface IMA of the optical lens on the optical axis), the lens group length TL of the optical lens (the distance from the center of the object-side surface S1 of the first lens L1 to the center of the image-side surface S14 of the seventh lens L7 on the optical axis), the focal length F3 of the third lens L3, the focal length F4 of the fourth lens L4, the focal length F5 of the fifth lens L5, and the focal length F6 of the sixth lens L6.

[0325]

[0326]

[0327] Table 30

[0328] In summary, Examples 1 to 10 respectively satisfy the relationships shown in Table 31.

[0329]

[0330] Table 31

[0331] The present application also provides an electronic device, which may include an optical lens according to the above-mentioned embodiment of the present application and an imaging element for converting an optical image formed by the optical lens into an electrical signal. The electronic device may be an independent electronic device such as a detection distance camera, or an imaging module integrated in a device such as a detection distance device. In addition, the electronic device may also be an independent imaging device such as a vehicle-mounted camera, or an imaging module integrated in a driving assistance system such as a vehicle-mounted camera.

[0332] 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

1. An optical lens, characterized in that: Along the optical axis from the object side to the image side, they include: The first lens has a negative optical power, and its object side surface is convex and its image side surface is concave; a second lens having optical power, wherein the object side surface is concave and the image side surface is convex; a third lens having positive refractive power; a fourth lens having positive refractive power; a fifth lens having positive refractive power; a sixth lens having negative optical power; and The seventh lens has optical power, The number of lenses having optical power in the optical lens is seven.

2. The optical lens according to claim 1, characterized in that: The second lens has positive refractive power.

3. The optical lens according to claim 1, characterized in that: The second lens has negative optical power.

4. The optical lens according to claim 1, characterized in that: The object side surface of the third lens is convex, and the image side surface is concave.

5. The optical lens according to claim 1, characterized in that: The object side surface of the third lens is convex, and the image side surface is convex.

6. The optical lens according to claim 1, characterized in that: The object side surface of the sixth lens is concave, and the image side surface is concave.

7. The optical lens according to claim 1, characterized in that: The object side surface of the sixth lens is concave, and the image side surface is convex.

8. The optical lens according to claim 1, characterized in that: The seventh lens has positive refractive power.

9. The optical lens according to claim 1, characterized in that: The seventh lens has negative refractive power.

10. An electronic device, characterized in that: The invention comprises an optical lens according to any one of claims 1 to 9 and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

Images