Optical lens

Abstract

The invention discloses an optical lens. From an object side to an image side along an optical axis, the optical lens sequentially comprises a first lens, a second lens, a third lens and a fourth lens, the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a concave surface; the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a concave surface; the fourth lens has positive focal power; a fifth lens element; a sixth lens; the seventh lens has negative focal power; the eighth lens has positive focal power; a ninth lens element having a concave object-side surface and a convex image-side surface; the object side surface of the tenth lens is a convex surface, and the image side surface is a concave surface; wherein the fifth lens and the sixth lens form a first cemented lens; the seventh lens and the eighth lens form a second cemented lens; the number of the lenses with focal power in the optical lens is ten; the optical lens satisfies the following conditions:-4.08 < = (f1 + f2) / f < =-2.92; wherein f is the total effective focal length of the optical lens, f1 is the effective focal length of the first lens, and f2 is the effective focal length of the second lens.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optical elements, in particular, to an optical lens. BACKGROUND

[0002] With the progress of science and technology and the development of 5G (the fifth generation of mobile communication), higher requirements are put forward for the performance of lenses in various industries. Since small apertures cannot meet the needs of low-illumination shooting environments, large apertures have become a trend in photographic lens products. At present, a series of large-aperture products have appeared on the market, but lenses that can simultaneously meet the requirements of large aperture, infrared confocal, and wide angle are few and far between.

[0003] Therefore, the present application aims at the deficiencies of the prior art and provides an optical lens that can simultaneously meet the requirements of large aperture, large target surface, day and night confocal, large field of view, and 4K high resolution. SUMMARY

[0004] The present application provides an optical lens, which comprises, in order from the object side to the image side along the optical axis: a first lens with negative optical power; a second lens with negative optical power, the object side being concave and the image side being concave; a third lens with positive optical power, the object side being convex and the image side being concave; a fourth lens with positive optical power; a fifth lens with optical power; a sixth lens with optical power; a seventh lens with negative optical power; an eighth lens with positive optical power; a ninth lens with optical power, the object side being concave and the image side being convex; a tenth lens with optical power, the object side being convex and the image side being concave; wherein the fifth lens and the sixth lens are cemented to form a first cemented lens, the optical powers of the fifth lens and the sixth lens being opposite in sign; the seventh lens and the eighth lens are cemented to form a second cemented lens; the optical powers of the ninth lens and the tenth lens are opposite in sign; the number of lenses with optical power in the optical lens is ten; the optical lens satisfies: -4.08≤(f1+f2) / f≤-2.92; wherein f is the total effective focal length of the optical lens, f1 is the effective focal length of the first lens, and f2 is the effective focal length of the second lens.

[0005] According to the exemplary embodiments of the present application, the object side of the first lens is convex and the image side is concave; the object side of the fourth lens is convex and the image side is convex; the object side of the fifth lens is convex and the image side is concave or convex; the object side of the sixth lens is convex or concave and the image side is convex; the object side of the seventh lens is convex and the image side is concave; the object side of the eighth lens is convex and the image side is convex.

[0006] According to an example embodiment of the present application, the optical lens satisfies at least one of the following conditional expressions: -2.39≤f1 / f≤-1.58, -1.85≤f2 / f≤-1.11, 3.43≤f3 / f≤7.19, where f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, f3 is the effective focal length of the third lens, and f is the total effective focal length of the optical lens.

[0007] According to an example embodiment of the present application, the optical lens satisfies at least one of the following conditional expressions: 1.54≤f4 / f≤2.58, -0.68≤(f1+f2) / (f3+f4)≤-0.36, where f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, f3 is the effective focal length of the third lens, f4 is the effective focal length of the fourth lens, and f is the total effective focal length of the optical lens.

[0008] According to an example embodiment of the present application, the optical lens satisfies at least one of the following conditional expressions: 4.97≤(f3+f4) / f≤9.62, 0.31≤f4 / f56≤0.81, where f3 is the effective focal length of the third lens, f4 is the effective focal length of the fourth lens, f56 is the effective focal length of the first cemented lens, and f is the total effective focal length of the optical lens.

[0009] According to an example embodiment of the present application, the optical lens satisfies at least one of the following conditional expressions: 2.71≤f56 / f≤5.51, 2.44≤f78 / f≤3.61, 0.82≤f56 / f78≤1.99, 2.05mm -1 ≤|VD5-VD6| / f56≤4.09mm -1 , 3.06mm -1 ≤|VD7-VD8| / f78≤5.13mm -1 , 0.01mm -1 ≤|ND5-ND6| / f≤0.08mm -1 , 0.01mm -1 ≤|ND7-ND8| / f≤0.08mm -1 , where f56 is the effective focal length of the first cemented lens, f78 is the effective focal length of the second cemented lens, f is the total effective focal length of the optical lens, ND5 is the refractive index of the fifth lens, ND6 is the refractive index of the sixth lens, ND7 is the refractive index of the seventh lens, ND8 is the refractive index of the eighth lens, VD5 is the Abbe number of the fifth lens, VD6 is the Abbe number of the sixth lens, VD7 is the Abbe number of the seventh lens, and VD8 is the Abbe number of the eighth lens.

[0010] According to the exemplary embodiments of the present application, the optical lens satisfies at least one of the following conditional expressions: -3.60

[0011] According to the exemplary embodiments of the present application, the optical lens satisfies at least one of the following conditional expressions: 0.31

[0012] According to the exemplary embodiments of the present application, the optical lens satisfies at least one of the following conditional expressions: -2.168 -1 ≤|VD5-VD6| / f56≤3.714mm -1 , 3.402mm -1 ≤|VD7-VD8| / f78≤4.660mm -1 , 0.03mm -1 ≤|ND5-ND6| / f≤0.05mm -1 , 0.03mm -1 ≤|ND7-ND8| / f≤0.05mm -1-3.272f9 / f 5.492, -3.692f10 / f 3.167, wherein f is the total effective focal length of the optical lens, f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, f3 is the effective focal length of the third lens, f4 is the effective focal length of the fourth lens, f56 is the effective focal length of the first cemented lens, f78 is the effective focal length of the second cemented lens, f9 is the effective focal length of the ninth lens, f10 is the effective focal length value of the tenth lens, ND5 is the refractive index of the fifth lens, ND6 is the refractive index of the sixth lens, ND7 is the refractive index of the seventh lens, ND8 is the refractive index of the eighth lens, VD5 is the Abbe number of the fifth lens, VD6 is the Abbe number of the sixth lens, VD7 is the Abbe number of the seventh lens, and VD8 is the Abbe number of the eighth lens.

[0013] According to the example embodiments of the present application, the optical lens satisfies at least one of the following conditional expressions: -3.710(f1+f2) / f -3.250, 5.524(f3+f4) / f 8.741, 0.342f4 / f56 0.732, 0.916f56 / f78 1.806, -0.397(R91+R92) / f9 0.809, -0.657(R101+R102) / f10 1.213, 0.349D1 / TTL 0.404, 2.987TTL / H 3.531, 6.639TTL / f 7.401, 1.097BFL / f 1.205, wherein f is the total effective focal length of the optical lens, f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, f3 is the effective focal length of the third lens, f4 is the effective focal length of the fourth lens, f56 is the effective focal length of the first cemented lens, f78 is the effective focal length of the second cemented lens, f9 is the effective focal length of the ninth lens, f10 is the effective focal length value of the tenth lens, R91 is the radius of curvature value of the object side surface of the ninth lens, R92 is the radius of curvature value of the image side surface of the ninth lens, R101 is the radius of curvature value of the object side surface of the tenth lens, R102 is the radius of curvature value of the image side surface of the tenth lens, D1 is the maximum entrance pupil of the first lens, TTL is the total optical length of the optical lens, BFL is the back focal length of the optical lens, and H is the full image height of the optical lens.

[0014] The optical lens of the present application meets the requirements of infrared confocal, large aperture (the maximum aperture value Fno = 1.072), large target surface (matching 1 / 1.8" chip), large field of view (the maximum field of view FOV = 162°), 4K high resolution, and stable imaging quality in the temperature range of -40℃ to 80℃, by reasonably setting the number of lenses (for example, 10 pieces), and reasonably allocating the focal power of each lens and optimizing the surface shape of each lens. BRIEF DESCRIPTION OF DRAWINGS

[0015] Other features, objects, and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments thereof as taken in conjunction with the accompanying drawings:

[0016] Figure 1 is a structural schematic diagram of an optical lens according to Embodiment 1 of the present application;

[0017] Figure 2 is a structural schematic diagram of an optical lens according to Embodiment 2 of the present application;

[0018] Figure 3 is a structural schematic diagram of an optical lens according to Embodiment 3 of the present application;

[0019] Figure 4 is a structural schematic diagram of an optical lens according to Embodiment 4 of the present application;

[0020] Figure 5 is a structural schematic diagram of an optical lens according to Embodiment 5 of the present application;

[0021] Figure 6 is a structural schematic diagram of an optical lens according to Embodiment 6 of the present application. DETAILED DESCRIPTION

[0022] For a better understanding of the present application, various aspects of the present application will be described in greater detail below with reference to the accompanying drawings. It is to be understood that the detailed description is merely exemplary of the application and is not intended to limit the scope of the application in any way. Throughout the specification, like reference numerals refer to like elements. The expression “and / or” includes any and all combinations of one or more of the associated listed items.

[0023] It is noted that, in this specification, the expressions first, second, third, etc. are merely used to distinguish one feature from another feature, and do not indicate any limitation on the features. Thus, the first lens discussed below can also be referred to as the second lens or the third lens without departing from the teachings of the present application.

[0024] In the drawings, the thickness, size, and shape of lenses have been slightly exaggerated for the sake of explanation. Specifically, the shape of a spherical surface or an aspherical surface shown in the drawings is shown by way of example. That is, the shape of a spherical surface or an aspherical surface is not limited to the shape of a spherical surface or an aspherical surface shown in the drawings. The drawings are merely examples and are not drawn to scale.

[0025] In the present disclosure, the paraxial region refers to a region near the optical axis. If a lens surface is convex and the position of the convex surface is not specified, it means that the lens surface is convex at least in the paraxial region. If a lens surface is concave and the position of the concave surface is not specified, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object is referred to as the object side surface of the lens, and the surface of each lens closest to the imaging plane is referred to as the image side surface of the lens.

[0026] It should also be understood that the words "comprise," "have," "contain," and similar words, when used in this specification, set out 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 combinations thereof. In addition, when expressions such as "at least one of" appear after a list of two or more items, it means that any of the items can be present, individually or in combination. In addition, when describing embodiments of the present application, the word "may" means "one or more embodiments of the present application." Also, the word "exemplary" is intended to mean an example or an illustration.

[0027] 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 should also be understood that the terms 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.

[0028] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0029] The optical lens according to the exemplary embodiments of the present application can sequentially include ten lenses with optical power along the optical axis from the object side to the image side, which are a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, and a tenth lens.

[0030] In the exemplary embodiments, the first lens of the optical lens has negative optical power. The object side surface of the first lens is convex, and the image side surface is concave. Such an arrangement can effectively collect light rays of a large field of view, which is conducive to reducing the incident angle of the incident light rays on the object side surface of the first lens, allowing the light rays to enter the rear optical system smoothly, and facilitating the correction of the aberration of the rear group.

[0031] In the example embodiments, since the first lens has a large radius of curvature value on the object side, the convex surface, the flat surface and the concave surface can be easily changed or finely adjusted among each other, which usually has little effect on the overall technical effect of the optical system. Therefore, a person skilled in the art can take the large radius of curvature as an optimization boundary condition, which is obvious and does not require creative effort.

[0032] In the example embodiments, the second lens of the optical lens has negative refractive power. The object side surface of the second lens is a concave surface, and the image side surface is a concave surface. Such an arrangement can facilitate the smooth divergence of the light rays entering through the first lens to the rear optical system, and can facilitate the reduction of the front aperture of the optical lens.

[0033] In the example embodiments, the third lens of the optical lens has positive refractive power. The object side surface of the third lens is a convex surface, and the image side surface is a concave surface. Such an arrangement can effectively control the smooth entry of light rays into the rear optical system, which can facilitate the reduction of spherical aberration and improve the imaging quality.

[0034] In the example embodiments, the fourth lens of the optical lens has positive refractive power. The object side surface of the fourth lens is a convex surface, and the image side surface is a convex surface. Such an arrangement can effectively converge light rays, so that the light rays have a larger aperture before entering the stop, which can facilitate the increase of the aperture of the optical lens.

[0035] In the example embodiments, the fifth lens of the optical lens has negative refractive power. The object side surface of the fifth lens is a convex surface, and the image side surface is a concave surface.

[0036] In the example embodiments, the sixth lens of the optical lens has positive refractive power. The object side surface of the sixth lens is a convex surface, and the image side surface is a convex surface. The sixth lens and the fifth lens are cemented to form a first cemented positive lens. Such an arrangement can facilitate the smooth transfer of light rays, reduce the tolerance sensitivity of the lens, correct chromatic aberration, improve resolution, and achieve 4K high image quality.

[0037] In the example embodiments, the fifth lens of the optical lens has positive refractive power. The object side surface of the fifth lens is a convex surface, and the image side surface is a convex surface.

[0038] In the example embodiments, the sixth lens of the optical lens has negative refractive power. The object side surface of the sixth lens is a concave surface, and the image side surface is a convex surface. The sixth lens and the fifth lens are cemented to form a first cemented positive lens. Such an arrangement can facilitate the control of the light ray trend, shorten the total optical length, and increase the aperture.

[0039] In the example embodiments, the seventh lens of the optical lens has negative refractive power. The object side surface of the seventh lens is a convex surface, and the image side surface is a concave surface.

[0040] In an example embodiment, the eighth lens of the optical lens has positive refractive power. The object side surface of the eighth lens is convex, and the image side surface of the eighth lens is convex. The eighth lens and the seventh lens are cemented to form a second cemented positive lens. Such an arrangement can effectively control the light path, ensure the light transmission height, be conducive to realizing a large target surface, and can also correct chromatic aberration and improve imaging quality.

[0041] In an example embodiment, the ninth lens of the optical lens has negative refractive power. The object side surface of the ninth lens is concave, and the image side surface of the ninth lens is convex.

[0042] In an example embodiment, the tenth lens of the optical lens has positive refractive power. The object side surface of the tenth lens is convex, and the image side surface of the tenth lens is concave. The tenth lens with positive refractive power and the ninth lens with negative refractive power are matched, such an arrangement can further adjust the light path at the end of the optical system, can ensure the light transmission height to the imaging surface, be conducive to realizing a large target surface, and also be conducive to realizing high illumination of the optical system.

[0043] In an example embodiment, the ninth lens of the optical lens has positive refractive power. The object side surface of the ninth lens is concave, and the image side surface of the ninth lens is convex.

[0044] In an example embodiment, the tenth lens of the optical lens has negative refractive power. The object side surface of the tenth lens is convex, and the image side surface of the tenth lens is concave. The tenth lens with negative refractive power and the ninth lens with positive refractive power are matched, such an arrangement can make the peripheral large-angle light as smooth as possible to transition to the rear optical system, can correct the remaining field curvature and astigmatism of the system, improve the resolving power; at the same time, the height of the rear optical system can be ensured, which is conducive to realizing a large target surface.

[0045] In an example embodiment, the optical lens satisfies -2.39≤f1 / f≤-1.58, where f1 is the effective focal length of the first lens, and f is the total effective focal length of the optical lens. By reasonably controlling the ratio range of the effective focal length of the first lens to the total effective focal length of the optical lens, it is conducive to the large-angle light entering the second lens to realize a large field of view. And in this range, the object side light can be smoothly introduced into the optical system, the light enters the second lens with a small incident angle, reduces the proportion of high-order aberration, reduces the lens aperture, and is conducive to shortening the total length of the lens. More specifically, f1 and f further satisfy -2.168≤f1 / f≤-1.753.

[0046] In an example embodiment, the optical lens satisfies: -1.85≤f2 / f≤-1.11, where f2 is the effective focal length of the second lens, and f is the total effective focal length of the optical lens. By reasonably controlling the range of the ratio of the effective focal length of the second lens to the total effective focal length of the optical lens, the object side light rays are further gently introduced into the optical system, the proportion of high-order aberrations is reduced, and the field curvature of the system is also corrected. More specifically, f2 and f further satisfy -1.685≤f2 / f≤-1.232.

[0047] In an example embodiment, the optical lens satisfies: 3.43≤f3 / f≤7.19, where f3 is the effective focal length of the third lens, and f is the total effective focal length of the optical lens. By reasonably controlling the range of the ratio of the effective focal length of the third lens to the total effective focal length of the optical lens, the spherical aberration generated by the first lens and the second lens is compensated for, the aberration generated by the first lens and the second lens is further corrected, and the resolution is improved. More specifically, f3 and f further satisfy 3.810≤f3 / f≤6.539.

[0048] In an example embodiment, the optical lens satisfies: 1.54≤f4 / f≤2.58, where f4 is the effective focal length of the fourth lens, and f is the total effective focal length of the optical lens. By reasonably controlling the range of the ratio of the effective focal length of the fourth lens to the total effective focal length of the optical lens, the sensitivity of the front lens is reduced, the aberration is corrected, the lens resolution is improved, and a large aperture can be achieved. More specifically, f4 and f further satisfy 1.714≤f4 / f≤2.341.

[0049] In an example embodiment, the optical lens satisfies: -4.08≤(f1+f2) / f≤-2.92, where f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, and f is the total effective focal length of the optical lens. By reasonably controlling the range of the ratio of the sum of the effective focal length of the first lens and the effective focal length of the second lens to the total effective focal length of the optical lens, the light rays are diverged by the two negative focal lengths, the light quantity of the rear optical system is increased, a large aperture is achieved, and clear imaging is achieved in dark or dim environments. More specifically, f1, f2, and f further satisfy -3.710≤(f1+f2) / f≤-3.250.

[0050] In exemplary embodiments, the optical lens satisfies: 4.97≤(f3+f4) / f≤9.62, where f3 is the effective focal length of the third lens, f4 is the effective focal length of the fourth lens, and f is the total effective focal length of the optical lens. By reasonably controlling the range of the ratio of the sum of the effective focal length of the third lens and the effective focal length of the fourth lens to the total effective focal length of the optical lens, the arrangement of the two positive lenses is conducive to converging light rays, which can avoid excessive pressure on the rear lens in correcting chromatic aberration, aberration and incident angle, and reduce the difficulty of lens processing. More specifically, f3, f4 and f further satisfy 5.524≤(f3+f4) / f≤8.741.

[0051] In exemplary embodiments, the optical lens satisfies: -0.68≤(f1+f2) / (f3+f4)≤-0.36, where f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, f3 is the effective focal length of the third lens, and f4 is the effective focal length of the fourth lens. By reasonably controlling the range of the ratio of the sum of the effective focal length of the first lens and the effective focal length of the second lens to the sum of the effective focal length of the third lens and the effective focal length of the fourth lens, it is conducive to bearing more optical power while ensuring good resolving power of the lens within a wide temperature range (-40°C to 80°C). More specifically, f1, f2 and f3, f4 further satisfy -0.614≤(f1+f2) / (f3+f4)≤-0.399.

[0052] In exemplary embodiments, the optical lens satisfies: 0.31≤f4 / f56≤0.81, where f4 is the effective focal length of the fourth lens, and f56 is the effective focal length of the first cemented lens. By reasonably controlling the range of the ratio of the effective focal length of the fourth lens to the effective focal length of the first cemented lens, it is conducive to balancing the aberration generated by the light diaphragm, thereby achieving higher imaging quality. More specifically, f4 and f56 further satisfy 0.342≤f4 / f56≤0.732.

[0053] In exemplary embodiments, the optical lens satisfies: 2.71≤f56 / f≤5.51, where f56 is the effective focal length of the first cemented lens, and f is the effective focal length of the optical lens. By reasonably controlling the range of the ratio of the effective focal length of the first cemented lens to the total effective focal length of the optical lens, it is conducive to balancing various aberrations generated by light passing through the diaphragm, improving the imaging quality, and achieving a large aperture. More specifically, f56 and f further satisfy 3.009≤f56 / f≤5.012.

[0054] In exemplary embodiments, the optical lens satisfies: 2.44≤f78 / f≤3.61, where f78 is the effective focal length of the second cemented lens, and f is the total effective focal length of the optical lens. By reasonably controlling the ratio range of the effective focal length of the second cemented lens to the total effective focal length of the optical lens, it is beneficial to balance various aberrations generated by the light passing through the diaphragm, improve the imaging quality, and realize a large aperture. More specifically, f78 and f further satisfy 2.714≤f78 / f≤3.285.

[0055] In exemplary embodiments, the optical lens satisfies: 0.82≤f56 / f78≤1.99, where f56 is the effective focal length of the first cemented lens, and f78 is the effective focal length of the second cemented lens. By reasonably controlling the ratio range of the effective focal length of the first cemented lens to the effective focal length of the second cemented lens, it is beneficial to balance the refractive power of the cemented lens, and at the same time, it is beneficial to realize the performance of the lens in the infrared state. More specifically, f56 and f78 further satisfy 0.916≤f56 / f78≤1.806.

[0056] In exemplary embodiments, the optical lens satisfies: 2.05mm -1 ≤|VD5-VD6| / f56≤4.09mm -1 , where VD5 is the Abbe number of the fifth lens, VD6 is the Abbe number of the sixth lens, and f56 is the effective focal length of the first cemented lens. By reasonably controlling the ratio range of the difference between the Abbe number of the fifth lens and the Abbe number of the sixth lens to the effective focal length of the first cemented lens, it is beneficial to balance the chromatic aberration, and further improve the near-infrared imaging performance of the optical system. More specifically, VD5, VD6 and f56 further satisfy 2.282mm -1 ≤|VD5-VD6| / f56≤3.714mm -1 .

[0057] In exemplary embodiments, the optical lens satisfies: 3.06mm -1 ≤|VD7-VD8| / f78≤5.13mm -1 , where VD7 is the Abbe number of the seventh lens, VD8 is the Abbe number of the eighth lens, and f78 is the effective focal length of the second cemented lens. By reasonably controlling the ratio range of the difference between the Abbe number of the seventh lens and the Abbe number of the eighth lens to the effective focal length of the second cemented lens, it is beneficial to balance the chromatic aberration, and further improve the near-infrared imaging performance of the optical system. More specifically, VD7, VD8 and f78 further satisfy 3.402mm -1 ≤|VD7-VD8| / f78≤4.660mm -1 .

[0058] In exemplary embodiments, the optical lens satisfies: 0.01mm-1 ≤|ND5-ND6| / f≤0.08mm -1 , wherein ND5 is the refractive index of the fifth lens, ND6 is the refractive index of the sixth lens, and f is the total effective focal length of the optical lens. By reasonably controlling the range of the ratio of the difference between the refractive index of the fifth lens and the refractive index of the sixth lens to the total effective focal length of the optical lens, the high-order aberration generated by the rear lens can be eliminated, the excessive rear-end chromatic aberration can be avoided, the imaging quality can be improved, and 4K high resolution can be achieved. More specifically, ND5, ND6, and f further satisfy 0.03mm -1 ≤|ND5-ND6| / f≤0.05mm -1 .

[0059] In an example embodiment, the optical lens satisfies: 0.01mm -1 ≤|ND7-ND8| / f≤0.08mm -1 , wherein ND7 is the refractive index of the seventh lens, ND8 is the refractive index of the eighth lens, and f is the total effective focal length of the optical lens. By reasonably controlling the range of the ratio of the difference between the refractive index of the seventh lens and the refractive index of the eighth lens to the total effective focal length of the optical lens, the high-order aberration generated by the rear lens can be eliminated, the excessive rear-end chromatic aberration can be avoided, the imaging quality can be improved, and 4K high resolution can be achieved. More specifically, ND7, ND8, and f further satisfy 0.03mm -1 ≤|ND7-ND8| / f≤0.05mm -1 .

[0060] In an example embodiment, the optical lens satisfies: -3.60≤f9 / f≤6.04, wherein f9 is the effective focal length of the ninth lens, and f is the total effective focal length of the optical lens. By reasonably controlling the range of the ratio of the effective focal length of the ninth lens to the total effective focal length of the optical lens, the trend of light rays can be controlled, the light rays can be smoothly transitioned, the overall aberration of the system can be effectively balanced, and the image quality under a large target surface can be ensured. More specifically, f9 and f further satisfy -3.272≤f9 / f≤5.492.

[0061] In an example embodiment, the optical lens satisfies: -4.06≤f10 / f≤3.48, wherein f10 is the effective focal length of the tenth lens, and f is the total effective focal length of the optical lens. By reasonably controlling the range of the ratio of the effective focal length of the tenth lens to the total effective focal length of the optical lens, the trend of light rays can be controlled, the height of light rays can be ensured, the light rays can be quickly focused to the imaging surface, and a large target surface can be achieved. More specifically, f10 and f further satisfy -3.692≤f10 / f≤3.167.

[0062] In exemplary embodiments, the optical lens satisfies: -0.44≤(R91+R92) / f9≤0.89, where R91 is the radius of curvature value of the object side surface of the ninth lens, R92 is the radius of curvature value of the image side surface of the ninth lens, and f9 is the effective focal length of the ninth lens. By reasonably controlling the range of the ratio of the sum of the radius of curvature values of the object side surface and the image side surface of the ninth lens to the effective focal length of the ninth lens, the height of the light on the object side surface of the ninth lens is controlled, and the light is compressed and converged, which helps to reduce the aberration of the system and improve the imaging quality of the optical lens. More specifically, R91, R92 and f9 further satisfy -0.397≤(R91+R92) / f9≤0.809.

[0063] In exemplary embodiments, the optical lens satisfies: -0.72≤(R101+R102) / f10≤1.33, where R101 is the radius of curvature value of the object side surface of the tenth lens, R102 is the radius of curvature value of the image side surface of the tenth lens, and f10 is the effective focal length of the tenth lens. By reasonably controlling the range of the ratio of the sum of the radius of curvature values of the object side surface and the image side surface of the tenth lens to the effective focal length of the tenth lens, the aberration generated by the first lens to the ninth lens is better corrected, the high-order spherical aberration and coma are improved, high resolution is achieved, and the overall resolution is uniform. More specifically, R101, R102 and f10 further satisfy -0.657≤(R101+R102) / f10≤1.213.

[0064] In exemplary embodiments, the optical lens satisfies: 0.31≤D1 / TTL≤0.44, where D1 is the maximum clear aperture of the first lens, and TTL is the total optical length of the optical lens. By reasonably controlling the range of the ratio of the clear aperture of the first lens to the total optical length of the optical lens, the volume of the optical lens is controlled to be smaller, the field of view and the amount of light can be increased as much as possible, and the performance of large aperture and small volume is balanced. More specifically, D1 and TTL can further satisfy 0.349≤D1 / TTL≤0.404.

[0065] In exemplary embodiments, the optical lens satisfies: 2.69≤TTL / H≤3.88, where H is the total image height of the optical lens, and TTL is the total optical length of the optical lens. By reasonably controlling the range of the ratio of the total optical length of the optical lens to the total image height of the optical lens, the volume of the lens is better controlled to be small. More specifically, TTL and H can further satisfy 2.987≤TTL / H≤3.531.

[0066] In an example embodiment, the optical lens satisfies: 5.98≤TTL / f≤8.14, where f is the total effective focal length of the optical lens, and TTL is the total track length of the optical lens. By reasonably controlling the ratio range of the total track length of the optical lens to the total effective focal length of the optical lens, the total track length can be constrained within a certain range under the condition of a certain focal length, which is conducive to miniaturization. More specifically, TTL and f can further satisfy 6.639≤TTL / f≤7.401.

[0067] In an example embodiment, the optical lens satisfies: 0.99≤BFL / f≤1.33, where BFL is the back focal length of the optical lens, and f is the total effective focal length of the optical lens. By reasonably controlling the ratio range of the back focal length of the optical lens to the total effective focal length of the optical lens, it is conducive to having a long back focal length on the basis of miniaturization, which is conducive to providing more assembly space for other optical elements, avoiding interference between optical elements, and improving assembly yield. More specifically, BFL and f can further satisfy 1.097≤BFL / f≤1.205.

[0068] In an example embodiment, the present application adopts the collocation of spherical lenses and aspherical lenses, which is conducive to reducing the processing difficulty of the lens; at the same time, through material collocation, athermalization design can be realized. The present application does not specifically limit the specific number of spherical lenses and aspherical lenses. When the imaging quality is emphasized, the number of aspherical lenses can be increased, and even all lenses use aspherical lenses. The aspherical lens has the characteristic that the curvature is continuously changed from the center of the lens to the periphery. Unlike the spherical lens which has constant curvature from the center of the lens to the periphery, the aspherical lens has better curvature radius characteristics, and has the advantages of improving distortion aberration and improving astigmatism aberration. After using the aspherical lens, the aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality of the lens. However, those skilled in the art should understand that the lens surface type of the optical lens can be changed without departing from the technical solutions claimed by the present application to obtain various results and advantages described in the present specification. For example, the second lens, the third lens, the fourth lens, the ninth lens and the tenth lens in the present application are all aspherical lenses, the fifth lens, the sixth lens, the seventh lens and the eighth lens are spherical lenses, and the first lens can be a spherical lens or an aspherical lens.

[0069] Those skilled in the art should understand that the refractive index temperature coefficient dn / dt and the abnormal dispersion of the plastic are large, and reasonable collocation of an appropriate amount of plastic material is beneficial to high and low temperature balance, but too much plastic lens is not conducive to system stability. The optical lens made of glass can suppress the shift of the back focus of the optical lens with temperature change, so as to improve the system stability; at the same time, the use of glass material can avoid the problem that the imaging of the lens is blurred due to the temperature change of high and low temperature in the use environment, and affect the normal use of the lens. The use of glass material is conducive to the athermalization of the lens. In addition, the use of glass material can also correct the chromatic aberration of the system, improve the resolution of the lens, and reduce the generation of ghosting. As an example, the second lens, the third lens, the fourth lens, the ninth lens and the tenth lens in the present application adopt plastic material, the fifth lens, the sixth lens, the seventh lens and the eighth lens adopt glass material, and the first lens can adopt plastic material or glass material. Such arrangement can make the temperature range of the optical lens wide, and the optical performance of the optical lens can be kept stable in the range of-40℃ to 80℃.

[0070] In an example embodiment, the total optical length TTL of the optical lens of the present application can satisfy: TTL≤30.3mm, the total optical length is short, the structure is compact, and the miniaturization of the lens can be realized. Further, the TTL can satisfy: 25.2mm≤TTL≤30.3mm.

[0071] In an example embodiment, the image height H corresponding to the maximum field angle of the optical lens of the present application can satisfy: H≥8.8mm. The large target surface of the optical lens can be realized.

[0072] In an example embodiment, the maximum field angle FOV of the optical lens of the present application can satisfy: FOV≥110°, and the large field angle of the optical lens can be realized. Further, the FOV can satisfy: 110°≤FOV≤162°.

[0073] In an example embodiment, the optical lens of the present application satisfies: Fno≤1.2. The optical lens can have the characteristics of large aperture, so that the lens has large light flux, and the day and night full color of the lens can be realized. Further, the Fno can satisfy: 1.0≤Fno≤1.2,

[0074] The optical lens of the present application can further include a diaphragm for limiting the light beam. The diaphragm is beneficial to converge the light entering the optical lens, reduce the maximum light aperture of the optical lens, and reduce the assembly sensitivity of the optical system, so as to further improve the imaging quality of the optical lens. It should be noted that the diaphragm can be arranged at any position between the lenses or on one side according to actual needs. For example, the diaphragm is arranged between the fourth lens and the fifth lens.

[0075] The optical lens has excellent resolving power, and the MTF values of the central field of view are all above 0.37 at a spatial frequency of 250 lp / mm, and can be matched with a camera to realize 4K high-resolution characteristics.

[0076] Optionally, in other alternative exemplary embodiments, the optical lens described above can also increase a filter for correcting color deviation and / or a protective glass for protecting a photosensitive element located on an imaging surface.

[0077] However, those skilled in the art should understand that the number of lenses constituting the optical lens can be changed without departing from the technical solutions claimed by the present application to obtain the various results and advantages described in the specification. For example, although ten lenses are described as an example in the embodiments, the optical lens is not limited to including ten lenses. If necessary, the optical lens can also include other numbers of lenses.

[0078] The specific embodiments of the optical lens applicable to the above-described embodiments are further described below with reference to the accompanying drawings.

[0079] Embodiment 1

[0080] Figure 1 The structural schematic diagram of the optical lens of Embodiment 1 of the present application is shown. As shown in the figure, 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, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a ninth lens L9, and a tenth lens L10. Figure 1

[0081] The first lens L1 has a negative focal power, and the object side surface S1 is a convex surface, and the image side surface S2 is a concave surface.

[0082] The second lens L2 has a negative focal power, and the object side surface S3 is a concave surface, and the image side surface S4 is a concave surface.

[0083] The third lens L3 has a positive focal power, and the object side surface S5 is a convex surface, and the image side surface S6 is a concave surface.

[0084] The fourth lens L4 has a positive focal power, and the object side surface S7 is a convex surface, and the image side surface S8 is a convex surface.

[0085] The fifth lens L5 has a negative focal power, and the object side surface S9 is a convex surface, and the image side surface S10 is a concave surface.

[0086] The sixth lens L6 has a positive focal power, and the object side surface S10 is a convex surface, and the image side surface S11 is a convex surface.

[0087] The seventh lens L7 has a negative focal power, and the object side surface S12 is a convex surface, and the image side surface S13 is a concave surface. ​

[0088] The eighth lens L8 has positive refractive power, the object side surface S13 is a convex surface, and the image side surface S14 is a convex surface.

[0089] The ninth lens L9 has negative refractive power, the object side surface S15 is a concave surface, and the image side surface S16 is a convex surface.

[0090] The tenth lens L10 has positive refractive power, the object side surface S17 is a convex surface, and the image side surface S18 is a concave surface.

[0091] The fifth lens L5 and the sixth lens L6 constitute a first cemented lens;

[0092] The seventh lens L7 and the eighth lens L8 constitute a second cemented lens.

[0093] The optical lens further comprises a stop STO, which can be arranged between the fourth lens L4 and the fifth lens L5.

[0094] The optical lens can further comprise a filter (not shown) having an object side surface and an image side surface and / or a protection glass CG having an object side surface S19 and an image side surface S20. The filter can be used to correct color deviation, and the protection glass CG can be used to protect the image sensor chip located at the imaging surface. Light from an object sequentially passes through the surfaces S1 to S20 and is finally imaged on the imaging surface IMA. It should be noted that the surfaces S1 to S20 are not shown in Figure 1 .

[0095] Table 1 shows the basic parameter table of the optical lens of embodiment 1, wherein the units of the radius of curvature and the thickness / distance are millimeters (mm).

[0096] Table 1

[0097]

[0098]

[0099] In embodiment 1, the object side surface and the image side surface of the second lens, the third lens, the fourth lens, the ninth lens and the tenth lens are aspherical surfaces, and the surface type of each aspherical lens can be defined by, but not limited to, the following aspherical formula:

[0100]

[0101] wherein x is the distance from the vertex of the aspheric surface 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 R in Table 1 above); k is the conic constant; and Ai is the correction coefficient of the i-th order of the aspheric surface. Table 2 below provides the conic constant k and the high-order term coefficients A4, A6, A8, A10, A12, and A14 that can be used for each aspheric surface in Example 1.

[0102] Table 2

[0103] Face number k A4 A6 A8 A10 A12 A14 S3 -5.729 -1.02E-03 2.02E-05 5.85E-08 -1.43E-07 9.37E-09 -1.77E-10 S4 2.043 -1.19E-03 -2.26E-05 4.12E-06 -3.62E-07 4.02E-09 2.66E-10 S5 -7.979 5.25E-04 1.14E-05 1.53E-06 -4.19E-08 -8.06E-09 3.44E-10 S6 19.834 -2.54E-04 -3.27E-06 3.08E-06 -4.42E-08 -6.94E-09 1.76E-10 S7 -5.751 4.60E-05 3.54E-05 -3.11E-07 -1.18E-08 4.55E-10 0.00E+00 S8 -3.919 5.68E-04 1.60E-05 2.06E-07 1.52E-08 -1.60E-10 0.00E+00 S15 -5.558 9.17E-04 -6.84E-05 4.06E-06 -1.50E-07 2.65E-09 -1.57E-11 S16 -12.753 4.14E-05 3.27E-05 -1.78E-06 3.82E-08 -2.49E-10 -1.09E-11 S17 -4.332 9.88E-04 -2.68E-04 1.22E-05 -9.06E-07 3.50E-08 -5.01E-10 S18 -8.789 9.41E-04 -2.04E-04 -7.20E-07 3.48E-07 -1.01E-08 9.19E-11

[0104] The focal length of the optical lens of Example 1 is 4.195 mm; the aperture FNO = 1.076; the field of view FOV = 130.6°; and the central field of view MTF value is 0.63 at a spatial frequency of 250 lp / mm.

[0105] Example 2

[0106] Figure 2 A structure diagram of the optical lens of Example 2 of the present application is shown. As shown in the structure diagram, 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, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a ninth lens L9, and a tenth lens L10. Figure 2

[0107] The first lens L1 has a negative focal power, and the object side S1 is a convex surface and the image side S2 is a concave surface.

[0108] The second lens L2 has a negative focal power, and the object side S3 is a concave surface and the image side S4 is a concave surface.

[0109] The third lens L3 has a positive focal power, and the object side S5 is a convex surface and the image side S6 is a concave surface.

[0110] The fourth lens L4 has a positive focal power, and the object side S7 is a convex surface and the image side S8 is a convex surface.

[0111] The fifth lens L5 has a negative focal power, and the object side S9 is a convex surface and the image side S10 is a concave surface.

[0112] The sixth lens L6 has a positive focal power, and the object side S10 is a convex surface and the image side S11 is a convex surface.

[0113] The seventh lens L7 has a negative focal power, and the object side S12 is a convex surface and the image side S13 is a concave surface.

[0114] The eighth lens L8 has a positive focal power, and the object side S13 is a convex surface and the image side S14 is a convex surface.​

[0115] The ninth lens L9 has negative focal power, the object side surface S15 is a concave surface, and the image side surface S16 is a convex surface.

[0116] The tenth lens L10 has positive focal power, the object side surface S17 is a convex surface, and the image side surface S18 is a concave surface.

[0117] The fifth lens L5 and the sixth lens L6 form a first cemented lens;

[0118] The seventh lens L7 and the eighth lens L8 form a second cemented lens.

[0119] The optical lens further comprises a stop STO, which can be arranged between the fourth lens L4 and the fifth lens L5.

[0120] The optical lens can further comprise a filter (not shown) having an object side surface and an image side surface, and / or a protection glass CG having an object side surface S19 and an image side surface S20. The filter can be used to correct color deviation, and the protection glass CG can be used to protect the image sensor chip located at the imaging surface. The light from the object sequentially passes through the surfaces S1 to S20 and is finally imaged on the imaging surface IMA. It should be noted that the surfaces S1 to S20 are not shown in the Figure 2 .

[0121] Table 3 shows the basic parameter table of the optical lens of embodiment 2, wherein the units of the radius of curvature and the thickness / distance are millimeters (mm).

[0122] Table 3

[0123]

[0124]

[0125] In embodiment 2, the object side surface and the image side surface of the first lens, the second lens, the third lens, the fourth lens, the ninth lens and the tenth lens are aspherical surfaces, and the surface type of each aspherical lens can be defined by, but not limited to, the formula (1) given in embodiment 1 above. The following table 4 gives the conic coefficient k and the high order term coefficients A4, A6, A8, A10, A12 and A14 that can be used for the surface type of each aspherical lens in embodiment 2.

[0126] Table 4

[0127] Face number k A4 A6 A8 A10 A12 A14 S1 -50.000 -2.35E-04 2.47E-06 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S2 -0.920 6.55E-04 7.60E-05 -6.39E-06 9.30E-07 -6.08E-08 1.83E-09 S3 -5.898 -8.41E-04 -8.59E-06 -6.10E-08 -1.31E-07 1.38E-08 -4.23E-10 S4 1.680 -1.59E-03 -6.45E-05 4.29E-06 -2.42E-07 5.75E-09 -8.67E-11 S5 -5.362 3.28E-04 -1.26E-07 1.85E-06 -1.67E-08 -7.20E-09 2.26E-10 S6 17.423 -1.73E-04 -2.41E-07 3.22E-06 -3.71E-08 -8.92E-09 1.99E-10 S7 -6.108 -2.63E-04 2.32E-05 -5.34E-08 1.08E-08 5.14E-11 0.00E+00 S8 -1.277 4.50E-05 1.11E-06 6.90E-07 -4.77E-08 2.61E-09 0.00E+00 S15 -5.249 1.11E-03 -5.75E-05 3.51E-06 -1.68E-07 5.09E-09 -6.82E-11 S16 -10.618 4.36E-04 3.03E-05 -2.35E-06 6.16E-08 5.69E-10 -3.11E-11 S17 -4.917 6.39E-05 -2.33E-04 1.05E-05 -8.13E-07 3.50E-08 -5.65E-10 S18 -9.528 6.00E-05 -1.64E-04 -1.51E-06 4.07E-07 -1.32E-08 1.36E-10

[0128] The focal length of the optical lens of this embodiment 2 is 4.452 mm; the aperture FNO = 1.072; the field of view FOV = 133.2°; and the central field of view MTF value is 0.68 when the spatial frequency is 250 lp / mm.

[0129] Embodiment 3

[0130] Figure 3 A structural schematic diagram of an optical lens of Embodiment 3 of the present application is shown. As shown, the optical lens comprises, 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, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a ninth lens L9, and a tenth lens L10. Figure 3

[0131] The first lens L1 has a negative focal power, the object side surface S1 is a convex surface, and the image side surface S2 is a concave surface.

[0132] The second lens L2 has a negative focal power, the object side surface S3 is a concave surface, and the image side surface S4 is a concave surface.

[0133] The third lens L3 has a positive focal power, the object side surface S5 is a convex surface, and the image side surface S6 is a concave surface.

[0134] The fourth lens L4 has a positive focal power, the object side surface S7 is a convex surface, and the image side surface S8 is a convex surface.

[0135] The fifth lens L5 has a negative focal power, the object side surface S9 is a convex surface, and the image side surface S10 is a concave surface.

[0136] The sixth lens L6 has a positive focal power, the object side surface S10 is a convex surface, and the image side surface S11 is a convex surface.

[0137] The seventh lens L7 has a negative focal power, the object side surface S12 is a convex surface, and the image side surface S13 is a concave surface.

[0138] The eighth lens L8 has a positive focal power, the object side surface S13 is a convex surface, and the image side surface S14 is a convex surface.

[0139] The ninth lens L9 has a negative focal power, the object side surface S15 is a concave surface, and the image side surface S16 is a convex surface.

[0140] The tenth lens L10 has a positive focal power, the object side surface S17 is a convex surface, and the image side surface S18 is a concave surface.

[0141] The fifth lens L5 and the sixth lens L6 constitute a first cemented lens;

[0142] The seventh lens L7 and the eighth lens L8 constitute a second cemented lens.

[0143] The optical lens further comprises a stop STO, which can be arranged between the fourth lens L4 and the fifth lens L5.

[0144] ​The optical lens can further include a filter (not shown) having an object side and an image side and / or a protective glass CG having an object side S19 and an image side S20. The filter can be used to correct color aberration and the protective glass CG can be used to protect the image sensor chip located at the imaging plane. Light from the object sequentially passes through the surfaces S1 to S20 and is finally imaged on the imaging plane IMA. It is noted that the surfaces S1 to S20 are not shown in Figure 3

[0145] Table 5 shows the basic parameter table of the optical lens of Example 3, wherein the units of the radius of curvature and the thickness / distance are millimeters (mm).

[0146] Table 5

[0147]

[0148] In Example 3, the object side and the image side of the second lens, the third lens, the fourth lens, the ninth lens and the tenth lens are aspherical surfaces, and the surface type of each aspherical lens can be defined by, but not limited to, the formula (1) given in Example 1 above. The following Table 6 gives the conic coefficient k and the high order term coefficients A4, A6, A8, A10, A12 and A14 that can be used for the surface type of each aspherical lens in Example 3.

[0149] Table 6

[0150] Face number k A4 A6 A8 A10 A12 A14 S3 -5.696 -1.37E-03 1.74E-05 1.38E-06 -1.70E-07 7.73E-09 -1.07E-10 S4 0.851 -1.37E-03 -2.71E-05 4.81E-06 -2.50E-07 -2.35E-09 3.30E-10 S5 -9.373 5.09E-04 1.31E-05 1.41E-06 -3.95E-08 -6.27E-09 2.52E-10 S6 20.582 -3.00E-04 -1.88E-07 2.64E-06 -3.91E-08 -5.36E-09 8.83E-11 S7 -5.878 -2.10E-05 3.70E-05 -2.30E-07 -1.18E-08 5.20E-10 0.00E+00 S8 -6.716 6.39E-04 2.21E-05 2.78E-09 2.36E-08 -1.84E-10 0.00E+00 S15 -5.949 9.62E-04 -6.59E-05 3.55E-06 -1.44E-07 3.23E-09 -2.94E-11 S16 -10.606 1.01E-04 2.49E-05 -2.03E-06 3.90E-08 2.86E-10 -1.64E-11 S17 -4.319 6.81E-04 -2.68E-04 1.22E-05 -8.74E-07 3.74E-08 -5.60E-10 S18 -7.632 8.46E-04 -2.07E-04 7.67E-07 3.59E-07 -1.15E-08 1.10E-10

[0151] The focal length of the optical lens of Example 3 is 4.677 mm; the aperture FNO = 1.077; the field of view FOV = 110°; and the central field of view MTF value is 0.42 at a spatial frequency of 250 lp / mm.

[0152] Example 4

[0153] Figure 4 The structure schematic diagram of the optical lens of Example 4 of the present application is shown. As shown in Figure 4 the optical lens sequentially includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a ninth lens L9 and a tenth lens L10 along the optical axis from the object side to the image side.

[0154] The first lens L1 has a negative focal power, the object side S1 is a convex surface, and the image side S2 is a concave surface.

[0155] The second lens L2 has a negative focal power, the object side S3 is a concave surface, and the image side S4 is a concave surface.

[0156] The third lens L3 has a positive focal power, the object side S5 is a convex surface, and the image side S6 is a concave surface.​

[0157] The fourth lens L4 has positive refractive power, the object side surface S7 is a convex surface, and the image side surface S8 is a convex surface.

[0158] The fifth lens L5 has negative refractive power, the object side surface S9 is a convex surface, and the image side surface S10 is a concave surface.

[0159] The sixth lens L6 has positive refractive power, the object side surface S10 is a convex surface, and the image side surface S11 is a convex surface.

[0160] The seventh lens L7 has negative refractive power, the object side surface S12 is a convex surface, and the image side surface S13 is a concave surface.

[0161] The eighth lens L8 has positive refractive power, the object side surface S13 is a convex surface, and the image side surface S14 is a convex surface.

[0162] The ninth lens L9 has negative refractive power, the object side surface S15 is a concave surface, and the image side surface S16 is a convex surface.

[0163] The tenth lens L10 has positive refractive power, the object side surface S17 is a convex surface, and the image side surface S18 is a concave surface.

[0164] The fifth lens L5 and the sixth lens L6 constitute a first cemented lens;

[0165] The seventh lens L7 and the eighth lens L8 constitute a second cemented lens.

[0166] The optical lens further comprises a stop STO, which can be arranged between the fourth lens L4 and the fifth lens L5.

[0167] The optical lens can further comprise a filter (not shown) having an object side surface and an image side surface, and / or a protection glass CG having an object side surface S19 and an image side surface S20. The filter can be used to correct color deviation, and the protection glass CG can be used to protect the image sensor chip located at the imaging plane. Light from the object sequentially passes through the surfaces S1 to S20 and is finally imaged on the imaging plane IMA. It should be noted that the surfaces S1 to S20 are not shown in the Figure 4 .

[0168] Table 7 shows the basic parameter table of the optical lens of embodiment 4, wherein the units of the radius of curvature and the thickness / distance are millimeters (mm).

[0169] Table 7

[0170]

[0171] In Example 4, the object-side and image-side surfaces of the second, third, fourth, ninth, and tenth lenses are all aspherical. The surface shape of each aspherical lens can be defined by, but is not limited to, formula (1) given in Example 1. Table 8 below lists the conic coefficient k and higher-order coefficients A4, A6, A8, A10, A12, A14, and A16 that can be used for each aspherical lens surface in Example 4.

[0172] Table 8

[0173]

[0174]

[0175] The focal length of the optical lens of this embodiment 4 is 3.807 mm; the aperture FNO is 1.089; the field of view angle FOV is 162°; and when the spatial frequency is 250 lp / mm, the central field of view MTF value is 0.67.

[0176] Example 5

[0177] Figure 5 FIG. 5 shows a schematic structural diagram of an optical lens according to Example 5 of the present application. Figure 5 As shown, the optical lens includes, from the object side to the image side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a ninth lens L9 and a tenth lens L10.

[0178] The first lens L1 has negative refractive power, its object-side surface S1 is convex, and its image-side surface S2 is concave.

[0179] The second lens L2 has negative refractive power, and its object-side surface S3 and image-side surface S4 are concave.

[0180] The third lens L3 has positive refractive power, its object-side surface S5 is convex, and its image-side surface S6 is concave.

[0181] The fourth lens L4 has positive refractive power, and its object-side surface S7 and image-side surface S8 are convex.

[0182] The fifth lens L5 has negative refractive power, and its object-side surface S9 is convex and its image-side surface S10 is concave.

[0183] The sixth lens L6 has positive refractive power, and its object-side surface S10 and image-side surface S11 are convex.

[0184] The seventh lens L7 has negative refractive power, its object-side surface S12 is convex, and its image-side surface S13 is concave.

[0185] The eighth lens L8 has positive refractive power, the object side surface S13 is a convex surface, and the image side surface S14 is a convex surface.

[0186] The ninth lens L9 has positive refractive power, the object side surface S15 is a concave surface, and the image side surface S16 is a convex surface.

[0187] The tenth lens L10 has negative refractive power, the object side surface S17 is a convex surface, and the image side surface S18 is a concave surface.

[0188] The fifth lens L5 and the sixth lens L6 constitute a first cemented lens;

[0189] The seventh lens L7 and the eighth lens L8 constitute a second cemented lens.

[0190] The optical lens further comprises a stop STO, which can be arranged between the fourth lens L4 and the fifth lens L5.

[0191] The optical lens can further comprise a filter (not shown) having an object side surface and an image side surface and / or a protection glass CG having an object side surface S19 and an image side surface S20. The filter can be used to correct color deviation, and the protection glass CG can be used to protect the image sensor chip located at the imaging plane. Light from the object sequentially passes through the surfaces S1 to S20 and is finally imaged on the imaging plane IMA. It should be noted that the surfaces S1 to S20 are not shown in the Figure 5 .

[0192] Table 9 shows the basic parameter table of the optical lens of embodiment 5, wherein the units of the radius of curvature and the thickness / distance are millimeters (mm).

[0193] Table 9

[0194]

[0195]

[0196] In embodiment 5, the object side surface and the image side surface of the second lens, the third lens, the fourth lens, the ninth lens and the tenth lens are aspherical surfaces, and the surface type of each aspherical lens can be defined by, but not limited to, the formula (1) given in embodiment 1 above. The following table 10 gives the conic coefficient k and the high-order term coefficients A4, A6, A8, A10, A12 and A14 that can be used for the surface type of each aspherical lens in embodiment 5.

[0197] Table 10

[0198] Face number k A4 A6 A8 A10 A12 A14 S3 -6.329 -1.87E-03 -7.37E-07 2.00E-06 -2.04E-07 3.96E-09 1.49E-10 S4 0.108 -1.52E-03 -2.95E-05 4.55E-06 -2.26E-07 1.42E-09 1.35E-10 S5 -12.311 6.00E-05 2.06E-06 1.48E-06 -3.41E-08 -4.45E-09 1.43E-10 S6 10.757 -1.63E-04 5.59E-06 1.17E-06 -4.18E-08 -1.98E-09 6.54E-11 S7 -3.153 1.04E-05 3.66E-05 -3.95E-08 -1.65E-08 3.30E-10 0.00E+00 S8 -7.779 6.26E-04 3.08E-05 5.60E-07 3.66E-08 -1.30E-09 0.00E+00 S15 -8.338 6.15E-04 -6.30E-05 3.46E-06 -1.30E-07 3.72E-09 -5.43E-11 S16 -10.095 1.72E-04 -6.15E-06 -1.39E-06 9.87E-08 -8.70E-10 -4.27E-11 S17 -11.615 -1.10E-03 -1.81E-04 1.52E-05 -8.89E-07 3.51E-08 -6.81E-10 S18 -9.585 -6.89E-04 -9.17E-05 1.74E-06 2.13E-07 -1.34E-08 2.09E-10

[0199] The focal length of the optical lens of this embodiment 5 is 4.557 mm; the aperture FNO = 1.161; the field of view FOV = 130.6°; the central field of view MTF value is 0.37 at a spatial frequency of 250 lp / mm.

[0200] Embodiment 6

[0201] Figure 6 The structural schematic diagram of the optical lens of the embodiment 6 of the present application is shown. As shown in the figure, the optical lens comprises, in sequence from the object side to the image side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a ninth lens L9 and a tenth lens L10. Figure 6

[0202] The first lens L1 has a negative focal power, the object side surface S1 is a convex surface, and the image side surface S2 is a concave surface.

[0203] The second lens L2 has a negative focal power, the object side surface S3 is a concave surface, and the image side surface S4 is a concave surface.

[0204] The third lens L3 has a positive focal power, the object side surface S5 is a convex surface, and the image side surface S6 is a concave surface.

[0205] The fourth lens L4 has a positive focal power, the object side surface S7 is a convex surface, and the image side surface S8 is a convex surface.

[0206] The fifth lens L5 has a positive focal power, the object side surface S9 is a convex surface, and the image side surface S10 is a convex surface.

[0207] The sixth lens L6 has a negative focal power, the object side surface S10 is a concave surface, and the image side surface S11 is a convex surface.

[0208] The seventh lens L7 has a negative focal power, the object side surface S12 is a convex surface, and the image side surface S13 is a concave surface.

[0209] The eighth lens L8 has a positive focal power, the object side surface S13 is a convex surface, and the image side surface S14 is a convex surface.

[0210] The ninth lens L9 has a negative focal power, the object side surface S15 is a concave surface, and the image side surface S16 is a convex surface.

[0211] The tenth lens L10 has a positive focal power, the object side surface S17 is a convex surface, and the image side surface S18 is a concave surface.

[0212] Among them, the fifth lens L5 and the sixth lens L6 constitute a first cemented lens;

[0213] The seventh lens L7 and the eighth lens L8 constitute a second cemented lens.

[0214] ​The optical lens further comprises a stop STO, which can be arranged between the fourth lens L4 and the fifth lens L5.

[0215] The optical lens can further comprise a filter (not shown) having an object side and an image side and / or a protection glass CG having an object side S19 and an image side S20. The filter can be used to correct color aberration, and the protection glass CG can be used to protect the image sensor chip located at the imaging plane. Light from the object sequentially passes through the surfaces S1 to S20 and is finally imaged on the imaging plane IMA. It should be noted that the surfaces S1 to S20 are not shown in Figure 6 .

[0216] Table 11 shows the basic parameter table of the optical lens of Example 6, wherein the units of the radius of curvature and the thickness / distance are all millimeters (mm).

[0217] Table 11

[0218]

[0219] In Example 6, the object side and the image side of the second lens, the third lens, the fourth lens, the ninth lens and the tenth lens are all aspherical surfaces, and the surface type of each aspherical lens can be defined by, but not limited to, the formula (1) given in Example 1 above. The following Table 12 gives the conic coefficient k and the high-order term coefficients A4, A6, A8, A10, A12 and A14 that can be used for the surface type of each aspherical lens in Example 6.

[0220] Table 12

[0221] Face number k A4 A6 A8 A10 A12 A14 S3 -5.732 -1.63E-03 5.75E-06 1.95E-06 -1.85E-07 8.31E-09 -1.25E-10 S4 0.894 -1.48E-03 -3.93E-05 4.70E-06 -2.08E-07 -9.34E-10 1.97E-10 S5 -11.142 4.48E-04 1.13E-05 9.86E-07 -5.65E-08 -4.72E-09 1.81E-10 S6 16.872 -6.80E-05 1.05E-05 1.84E-06 -7.37E-08 -6.66E-09 1.85E-10 S7 -5.203 -8.27E-05 4.36E-05 -1.27E-07 -4.14E-09 4.29E-10 0.00E+00 S8 -2.891 5.55E-04 2.63E-05 8.30E-08 5.59E-08 5.03E-10 0.00E+00 S15 -4.872 9.35E-04 -6.81E-05 3.79E-06 -1.45E-07 2.36E-09 -8.19E-12 S16 -11.584 8.40E-05 3.03E-05 -1.79E-06 4.79E-08 -5.32E-10 -1.30E-11 S17 -5.360 9.16E-04 -2.40E-04 1.32E-05 -8.86E-07 3.66E-08 -5.93E-10 S18 -28.853 1.13E-03 -1.82E-04 8.51E-07 3.14E-07 -1.18E-08 1.33E-10

[0222] The focal length of the optical lens of this Example 6 is 4.202 mm; the aperture FNO = 1.078; the field of view FOV = 130.6°; and the central field of view MTF value is 0.37 when the spatial frequency is 250 lp / mm.

[0223] In summary, the optical lenses in Examples 1 to 6 respectively satisfy the relationships shown in Table 13, wherein the parameters ND, VD are unitless, and the units of the remaining parameters are millimeters (mm).

[0224] Table 13

[0225]

[0226]

[0227] The above description is only the preferred embodiment of the present application and the explanation of the technical principles. It should be understood by those skilled in the art that the scope of the disclosure of the present application is not limited to the technical scheme composed of the specific combination of the above technical features, and should also cover other technical schemes formed by the combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the technical scheme formed by replacing the above features with the technical features disclosed in the present application (but not limited to) having similar functions.

Claims

1. An optical lens, characterized in that: Along the optical axis from the object side to the image side, they include: a first lens having negative optical power; a second lens having negative optical power, wherein the object-side surface and the image-side surface are concave; The third lens has positive optical power, its object-side surface is convex and its image-side surface is concave; a fourth lens element having positive optical power; a fifth lens having optical power; a sixth lens having optical power; a seventh lens having negative optical power; an eighth lens having positive optical power; a ninth lens element having optical power, wherein the object-side surface is concave and the image-side surface is convex; a tenth lens having optical power, wherein the object-side surface is convex and the image-side surface is concave; The fifth lens and the sixth lens are cemented together to form a first cemented lens, and the positive and negative optical power properties of the fifth lens and the sixth lens are opposite; The seventh lens and the eighth lens are cemented together to form a second cemented lens; The positive and negative properties of the optical power of the ninth lens and the tenth lens are opposite; The number of lenses having optical power in the optical lens is ten; The optical lens satisfies the following conditions: -4.08≤(f1+f2) / f≤-2.92; Wherein, f is the total effective focal length of the optical lens, f1 is the effective focal length of the first lens, and f2 is the effective focal length of the second lens.

2. The optical lens according to claim 1, wherein: The object side surface of the first lens is convex, and the image side surface is concave; The object-side surface of the fourth lens is convex, and the image-side surface is convex; The object-side surface of the fifth lens is convex, and the image-side surface is concave or convex; The object-side surface of the sixth lens is convex or concave, and the image-side surface is convex; The object-side surface of the seventh lens is convex, and the image-side surface is concave; The object-side surface of the eighth lens is convex, and the image-side surface is convex.

3. The optical lens according to claim 1 or 2, characterized in that: The optical lens satisfies at least one of the following conditions: -2.39≤f1 / f≤-1.58, -1.85≤f2 / f≤-1.11, 3.43≤f3 / f≤7.19, Among them, f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, f3 is the effective focal length of the third lens, and f is the total effective focal length of the optical lens.

4. The optical lens according to claim 1 or 2, characterized in that: The optical lens satisfies at least one of the following conditions: 1.54≤f4 / f≤2.58, -0.68≤(f1+f2) / (f3+f4)≤-0.36, Among them, f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, f3 is the effective focal length of the third lens, f4 is the effective focal length of the fourth lens, and f is the total effective focal length of the optical lens.

5. The optical lens according to claim 1 or 2, characterized in that: The optical lens satisfies at least one of the following conditions: 4.97≤(f3+f4) / f≤9.62, 0.31≤f4 / f56≤0.81, Among them, f3 is the effective focal length of the third lens, f4 is the effective focal length of the fourth lens, f56 is the effective focal length of the first cemented lens, and f is the total effective focal length of the optical lens.

6. The optical lens according to claim 1 or 2, characterized in that: The optical lens satisfies at least one of the following conditions: 2.71≤f56 / f≤5.51, 2.44≤f78 / f≤3.61, 0.82≤f56 / f78≤1.99, 2.05mm -1 ≤|VD5-VD6| / f56≤4.09mm -1 , 3.06mm -1 ≤|VD7-VD8| / f78≤5.13mm -1 , 0.01mm -1 ≤|ND5-ND6| / f≤0.08mm -1 , 0.01mm -1 ≤|ND7-ND8| / f≤0.08mm -1 , Wherein, f56 is the effective focal length of the first cemented lens, f78 is the effective focal length of the second cemented lens, f is the total effective focal length of the optical lens, ND5 is the refractive index of the fifth lens, ND6 is the refractive index of the sixth lens, ND7 is the refractive index of the seventh lens, ND8 is the refractive index of the eighth lens, VD5 is the Abbe number of the fifth lens, VD6 is the Abbe number of the sixth lens, VD7 is the Abbe number of the seventh lens, and VD8 is the Abbe number of the eighth lens.

7. The optical lens according to claim 1 or 2, characterized in that: The optical lens satisfies at least one of the following conditions: -3.60≤f9 / f≤6.04, -4.06≤f10 / f≤3.48, -0.44≤(R91+R92) / f9≤0.89, -0.72≤(R101+R102) / f10≤1.33, Among them, f9 is the effective focal length of the ninth lens, f10 is the effective focal length of the tenth lens, f is the total effective focal length of the optical lens, R91 is the curvature radius value of the object side of the ninth lens, R92 is the curvature radius value of the image side of the ninth lens, R101 is the curvature radius value of the object side of the tenth lens, and R102 is the curvature radius value of the image side of the tenth lens.

8. The optical lens according to claim 1 or 2, wherein: The optical lens satisfies at least one of the following conditions: 0.31≤D1 / TTL≤0.44, 2.69≤TTL / H≤3.88, 5.98≤TTL / f≤8.14, 0.99≤BFL / f≤1.33, Wherein, f is the total effective focal length of the optical lens, D1 is the maximum clear aperture of the first lens, TTL is the total optical length of the optical lens, BFL is the back focal length of the optical lens, and H is the full image height of the optical lens.

9. The optical lens according to claim 1 or 2, wherein: The optical lens satisfies at least one of the following conditions: -2.168≤f1 / f≤-1.753, -1.685≤f2 / f≤-1.232, 3.810≤f3 / f≤6.539, 1.714≤f4 / f≤2.341, -0.614≤(f1+f2) / (f3+f4)≤-0.399, 3.009≤f56 / f≤5.012, 2.714≤f78 / f≤3.285, 2.282mm -1 ≤|VD5-VD6| / f56≤3.714mm -1 , 3.402mm -1 ≤|VD7-VD8| / f78≤4.660mm -1 , 0.03mm -1 ≤|ND5-ND6| / f≤0.05mm -1 , 0.03mm -1 ≤|ND7-ND8| / f≤0.05mm -1 , -3.272≤f9 / f≤5.492, -3.692≤f10 / f≤3.167, Wherein, f is the total effective focal length of the optical lens, f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, f3 is the effective focal length of the third lens, f4 is the effective focal length of the fourth lens, f56 is the effective focal length of the first cemented lens, f78 is the effective focal length of the second cemented lens, f9 is the effective focal length of the ninth lens, f10 is the effective focal length of the tenth lens, ND5 is the refractive index of the fifth lens, ND6 is the refractive index of the sixth lens, ND7 is the refractive index of the seventh lens, ND8 is the refractive index of the eighth lens, VD5 is the Abbe number of the fifth lens, VD6 is the Abbe number of the sixth lens, VD7 is the Abbe number of the seventh lens, and VD8 is the Abbe number of the eighth lens.

10. The optical lens according to claim 1 or 2, characterized in that: The optical lens satisfies at least one of the following conditions: -3.710≤(f1+f2) / f≤-3.250, 5.524≤(f3+f4) / f≤8.741, 0.342≤f4 / f56≤0.732, 0.916≤f56 / f78≤1.806, -0.397≤(R91+R92) / f9≤0.809, -0.657≤(R101+R102) / f10≤1.213, 0.349≤D1 / TTL≤0.404, 2.987≤TTL / H≤3.531, 6.639≤TTL / f≤7.401, 1.097≤BFL / f≤1.205, Among them, f is the total effective focal length of the optical lens, f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, f3 is the effective focal length of the third lens, f4 is the effective focal length of the fourth lens, f56 is the effective focal length of the first cemented lens, f78 is the effective focal length of the second cemented lens, f9 is the effective focal length of the ninth lens, f10 is the effective focal length of the tenth lens, R91 is the curvature radius of the object side of the ninth lens, R92 is the curvature radius of the image side of the ninth lens, R101 is the curvature radius of the object side of the tenth lens, R102 is the curvature radius of the image side of the tenth lens, D1 is the maximum clear aperture of the first lens, TTL is the total optical length of the optical lens, BFL is the back focal length of the optical lens, and H is the full image height of the optical lens.

Images