Optical lens and electronic equipment

Abstract

The invention provides an optical lens and electronic equipment. The optical lens sequentially comprises a first lens with negative focal power from a first side to a second side along an optical axis, a second lens with negative focal power, a third lens with negative focal power and a fourth lens with negative focal power, the first side surface of the second lens is a concave surface, and the second side surface of the second lens is a convex surface; the third lens has positive focal power, and the first side surface of the third lens is a convex surface; the first side surface of the fourth lens is a convex surface, and the second side surface of the fourth lens is a convex surface; the fifth lens has negative focal power, and the first side surface of the fifth lens is a concave surface; the sixth lens has positive focal power, and the second side surface of the sixth lens is a convex surface; and the seventh lens has focal power. According to the invention, the problem that the optical lens in the prior art is difficult to give consideration to high resolution, good temperature performance, high light flux and miniaturization at the same time is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of optical imaging devices, and in particular, to an optical lens and an electronic device. Background Art

[0002] In recent years, with the development of technology, the demand for optical lenses in daily life has been increasing, and optical lenses have been applied to more and more scenarios. For example, in the automotive driving industry, for driving safety, it is necessary to detect the driving environment more accurately, and the optical lens has become a key device for detecting information around the vehicle. At the same time, with the rapid development of the automotive autonomous driving assistance system, the number of optical lenses used in vehicles has gradually increased.

[0003] However, there are various problems with existing optical lenses. For example: In order to achieve the effects of cost reduction and light weight, the existing optical lenses in the prior art cause adverse effects such as unclear images under high and low temperature conditions; and the thermal stability of the optical system is poor, and it is difficult to meet the requirements for resolution after returning from high temperature to normal temperature.

[0004] There are also some optical lenses that can achieve a clarity of one million pixels, but aberration problems such as chromatic aberration, astigmatism, and distortion are relatively serious, making it difficult to ensure the imaging quality. Moreover, the light passing ability of the current optical lenses is not strong, and it is difficult to adapt to environments with weak light such as at night or on rainy and cloudy days, or it is difficult to balance the overall miniaturization while meeting the requirement of high light flux. In addition, there are some optical lenses that, while meeting short focal lengths, often have a decrease in resolution at large angles, and at the same time, the angular resolution in the central region is relatively large, and the imaging effect in the central region is more prominent.

[0005] That is to say, there is a problem that it is difficult to simultaneously balance high resolution, good temperature performance, high light flux, and miniaturization in the optical lenses in the prior art. Summary of the Invention

[0006] The main object of the present invention is to provide an optical lens and an electronic device to solve the problem that it is difficult to simultaneously balance high resolution, good temperature performance, high light flux, and miniaturization in the optical lenses in the prior art.

[0007] To achieve the above object, according to one aspect of the present invention, an optical lens is provided, which sequentially includes, along the optical axis from the first side to the second side: a first lens with a negative focal power, the first side of the first lens being convex and the second side being concave; a second lens with a focal power, the first side of the second lens being concave and the second side being convex; a third lens with a positive focal power, the first side of the third lens being convex; a fourth lens with a positive focal power, the first side of the fourth lens being convex and the second side being convex; a fifth lens with a negative focal power, the first side of the fifth lens being concave; a sixth lens with a positive focal power, the second side of the sixth lens being convex; and a seventh lens with a focal power.

[0008] Further, the second lens has a negative focal power; or the second lens has a positive focal power.

[0009] Further, the second side of the third lens is convex; or the second side of the third lens is concave.

[0010] Further, the second side of the fifth lens is concave; or the second side of the fifth lens is convex.

[0011] Further, the first side of the sixth lens is convex; or the first side of the sixth lens is concave.

[0012] Further, the seventh lens has a negative focal power, the first side of the seventh lens being convex and the second side being concave; or the seventh lens has a negative focal power, the first side of the seventh lens being concave and the second side being concave; or the seventh lens has a positive focal power, the first side of the seventh lens being convex and the second side being convex.

[0013] Further, the fourth lens and the fifth lens are cemented to form a doublet lens; and / or the first lens, the second lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens are all aspherical lenses.

[0014] Further, the optical lens further includes a diaphragm, the diaphragm being disposed between the third lens and the fourth lens; and / or at least one of the first lens, the second lens, the fifth lens, the sixth lens and the seventh lens is set to be anastigmatic.

[0015] Further, the maximum field of view FOV of the optical lens, the overall focal length value F of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy: (FOV × F) / H ≤ 80.

[0016] Further, the maximum field of view FOV of the optical lens, the overall focal length value F of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy: 30 ≤ (FOV × F) / H ≤ 70.

[0017] Furthermore, the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging surface of the optical lens, the radian value θ of the maximum field of view angle of the optical lens, and the image height H corresponding to the maximum field of view angle of the optical lens satisfy: TTL / H / θ ≤ 2.

[0018] Furthermore, the maximum clear aperture D of the first side of the first lens corresponding to the maximum field of view angle of the optical lens, the image height H corresponding to the maximum field of view angle of the optical lens, and the radian value θ of the maximum field of view angle of the optical lens satisfy: D / H / θ ≤ 0.9.

[0019] Furthermore, the overall focal length value F of the optical lens and the image height H corresponding to the maximum field of view angle of the optical lens satisfy: F / H ≤ 0.8.

[0020] Furthermore, the aperture diameter DST and the overall focal length value F of the optical lens satisfy: DST / F ≤ 1.5.

[0021] Furthermore, the included angle arctan(1 / K(S2)) of the second side of the first lens and the overall focal length value F of the optical lens satisfy: 15 ≤ arctan(1 / K(S2)) / F.

[0022] Furthermore, the included angle arctan(1 / K(S2)) of the second side of the first lens and the overall focal length value F of the optical lens satisfy: 15 ≤ arctan(1 / K(S2)) / F ≤ 40.

[0023] Furthermore, the image height H corresponding to the maximum field of view angle of the optical lens, the overall focal length value F of the optical lens, and the radian value θ of the maximum field of view angle of the optical lens satisfy: 0.5 ≤ (H / 2) / (F * tan(θ / 2)) ≤ 0.9.

[0024] Furthermore, the central thickness d8 of the fourth lens, the central thickness d9 of the fifth lens, and the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging surface of the optical lens, satisfy: (d8 + d9) / TTL ≤ 0.4.

[0025] Furthermore, the central thickness d8 of the fourth lens, the central thickness d9 of the fifth lens, and the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging surface of the optical lens, satisfy: 0.08 ≤ (d8 + d9) / TTL ≤ 0.3.

[0026] Furthermore, the central radius of curvature R3 of the first side of the second lens and the central radius of curvature R4 of the second side of the second lens satisfy: 0 < R3 / R4 ≤ 2.5.

[0027] Further, the following condition is satisfied between the central curvature radius R3 of the first side surface of the second lens and the central curvature radius R4 of the second side surface of the second lens: 0.25 ≤ R3 / R4 ≤ 2.

[0028] Further, the following condition is satisfied between the focal length F2 of the second lens and the overall focal length value F of the optical lens: 5 ≤ |F2 / F|.

[0029] Further, the following condition is satisfied between the focal length F2 of the second lens and the overall focal length value F of the optical lens: 8 ≤ |F2 / F|.

[0030] Further, the following condition is satisfied between the central curvature radius R1 of the first side surface of the first lens and the overall focal length value F of the optical lens: R1 / F ≤ 5.

[0031] Further, the following condition is satisfied between the central curvature radius R1 of the first side surface of the first lens and the overall focal length value F of the optical lens: R1 / F ≤ 3.

[0032] Further, the following condition is satisfied between the central thickness d11 of the sixth lens and the overall optical length of the optical lens, that is, the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging surface of the optical lens: d11 / TTL ≤ 0.35.

[0033] Further, the following condition is satisfied between the central thickness d11 of the sixth lens and the overall optical length of the optical lens, that is, the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging surface of the optical lens: d11 / TTL ≤ 0.2.

[0034] Further, the following condition is satisfied between the overall focal length value F of the optical lens and the optical back focal length of the optical lens, that is, the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging surface: F / BFL ≤ 3.

[0035] Further, the following condition is satisfied between the focal length F6 of the sixth lens and the focal length F7 of the seventh lens: -20 ≤ F6 / F7 ≤ -0.15.

[0036] Further, the following condition is satisfied between the focal length F6 of the sixth lens and the focal length F7 of the seventh lens: -10 ≤ F6 / F7 ≤ -0.3.

[0037] Further, the following condition is satisfied between the central curvature radius R1 of the first side surface of the first lens and the central curvature radius R2 of the second side surface of the first lens: R1 / R2 ≤ 6.

[0038] Further, the following condition is satisfied between the central curvature radius R1 of the first side surface of the first lens and the central curvature radius R2 of the second side surface of the first lens: 0.5 ≤ R1 / R2 ≤ 5.

[0039] Further, the central radius of curvature R6 of the second side surface of the third lens and the central radius of curvature R5 of the first side surface of the third lens satisfy: 0.5 ≤ |R6 / R5|.

[0040] Further, the central radius of curvature R6 of the second side surface of the third lens and the central radius of curvature R5 of the first side surface of the third lens satisfy: 0.8 ≤ |R6 / R5|.

[0041] Further, the central radius of curvature R7 of the first side surface of the fourth lens and the central radius of curvature R8 of the second side surface of the fourth lens satisfy: 0.7 ≤ |R7 / R8| ≤ 3.

[0042] Further, the central radius of curvature R7 of the first side surface of the fourth lens and the central radius of curvature R8 of the second side surface of the fourth lens satisfy: 0.85 ≤ |R7 / R8| ≤ 2.5.

[0043] Further, the central radius of curvature R4 of the second side surface of the second lens and the central radius of curvature R5 of the first side surface of the third lens satisfy: R4 / R5 < 0.

[0044] Further, the central radius of curvature R4 of the second side surface of the second lens and the central radius of curvature R5 of the first side surface of the third lens satisfy: -5 ≤ R4 / R5 ≤ -0.2.

[0045] Further, the central radius of curvature R10 of the second side surface of the fifth lens and the central radius of curvature R9 of the first side surface of the fifth lens satisfy: 1.5 ≤ |R10 / R9|.

[0046] Further, the central radius of curvature R10 of the second side surface of the fifth lens and the overall focal length value F of the optical lens satisfy: 1.5 ≤ |R10 / F|.

[0047] Further, the central radius of curvature R10 of the second side surface of the fifth lens and the overall focal length value F of the optical lens satisfy: 2 ≤ |R10 / F|.

[0048] Further, the overall focal length value F of the optical lens and the overall optical length of the optical lens, that is, the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging surface of the optical lens satisfy: F / TTL ≤ 0.35.

[0049] According to another aspect of the present invention, there is also provided an optical lens, which sequentially includes, from a first side to a second side along the optical axis: a first lens with a negative optical power; a second lens with an optical power; a third lens with a positive optical power; a fourth lens with a positive optical power; a fifth lens with a negative optical power; a sixth lens with a positive optical power; a seventh lens with an optical power; wherein, the included angle arctan(1 / K(S2)) of the second side surface of the first lens and the overall focal length value F of the optical lens satisfy: 15 ≤ arctan(1 / K(S2)) / F.

[0050] Further, the first side surface of the first lens is a convex surface, and the second side surface is a concave surface.

[0051] Further, the second lens has a negative optical power, the first side surface of the second lens is a concave surface, and the second side surface is a convex surface; or the second lens has a positive optical power, the first side surface of the second lens is a concave surface, and the second side surface is a convex surface.

[0052] Further, the first side surface of the third lens is a convex surface, and the second side surface is a convex surface; or the first side surface of the third lens is a convex surface, and the second side surface is a concave surface.

[0053] Further, the first side surface of the fourth lens is a convex surface, and the second side surface is a convex surface.

[0054] Further, the first side surface of the fifth lens is a concave surface, and the second side surface is a concave surface; or the first side surface of the fifth lens is a concave surface, and the second side surface is a convex surface.

[0055] Further, the first side surface of the sixth lens is a convex surface, and the second side surface is a convex surface; or the first side surface of the sixth lens is a concave surface, and the second side surface is a convex surface.

[0056] Further, the seventh lens has a negative optical power, the first side surface of the seventh lens is a convex surface, and the second side surface is a concave surface; or the seventh lens has a negative optical power, the first side surface of the seventh lens is a concave surface, and the second side surface is a concave surface; or the seventh lens has a positive optical power, the first side surface of the seventh lens is a convex surface, and the second side surface is a convex surface.

[0057] Further, the fourth lens and the fifth lens are cemented to form a doublet lens; or the first lens, the second lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens are all aspherical lenses.

[0058] Further, the optical lens further includes a diaphragm, and the diaphragm is disposed between the third lens and the fourth lens; or at least one of the first lens, the second lens, the fifth lens, the sixth lens and the seventh lens is provided with an anastigmatism.

[0059] Furthermore, the following relationship holds among the maximum field of view angle FOV of the optical lens, the overall focal length value F of the optical lens, and the image height H corresponding to the maximum field of view angle of the optical lens: (FOV × F) / H ≤ 80.

[0060] Furthermore, the following relationship holds among the maximum field of view angle FOV of the optical lens, the overall focal length value F of the optical lens, and the image height H corresponding to the maximum field of view angle of the optical lens: 30 ≤ (FOV × F) / H ≤ 70.

[0061] Furthermore, the following relationship holds among the overall optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging surface of the optical lens, the radian value θ of the maximum field of view angle of the optical lens, and the image height H corresponding to the maximum field of view angle of the optical lens: TTL / H / θ ≤ 2.

[0062] Furthermore, the following relationship holds among the maximum clear aperture D of the first side of the first lens corresponding to the maximum field of view angle of the optical lens, the image height H corresponding to the maximum field of view angle of the optical lens, and the radian value θ of the maximum field of view angle of the optical lens: D / H / θ ≤ 0.9.

[0063] Furthermore, the following relationship holds between the overall focal length value F of the optical lens and the image height H corresponding to the maximum field of view angle of the optical lens: F / H ≤ 0.8.

[0064] Furthermore, the following relationship holds between the aperture diameter DST and the overall focal length value F of the optical lens: DST / F ≤ 1.5.

[0065] Furthermore, the following relationship holds between the opening angle arctan(1 / K(S2)) of the second side of the first lens and the overall focal length value F of the optical lens: 15 ≤ arctan(1 / K(S2)) / F ≤ 40.

[0066] Furthermore, the following relationship holds among the image height H corresponding to the maximum field of view angle of the optical lens, the overall focal length value F of the optical lens, and the radian value θ of the maximum field of view angle of the optical lens: 0.5 ≤ (H / 2) / (F * tan(θ / 2)) ≤ 0.9.

[0067] Furthermore, the following relationship holds among the central thickness d8 of the fourth lens, the central thickness d9 of the fifth lens, and the overall optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging surface of the optical lens: (d8 + d9) / TTL ≤ 0.4.

[0068] Furthermore, the following relationship holds among the central thickness d8 of the fourth lens, the central thickness d9 of the fifth lens, and the overall optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging surface of the optical lens: 0.08 ≤ (d8 + d9) / TTL ≤ 0.3.

[0069] Furthermore, the following condition is satisfied between the central curvature radius R3 of the first side surface of the second lens and the central curvature radius R4 of the second side surface of the second lens: 0 < R3 / R4 ≤ 2.5.

[0070] Furthermore, the following condition is satisfied between the central curvature radius R3 of the first side surface of the second lens and the central curvature radius R4 of the second side surface of the second lens: 0.25 ≤ R3 / R4 ≤ 2.

[0071] Furthermore, the following condition is satisfied between the focal length F2 of the second lens and the overall focal length value F of the optical lens: 5 ≤ |F2 / F|.

[0072] Furthermore, the following condition is satisfied between the focal length F2 of the second lens and the overall focal length value F of the optical lens: 8 ≤ |F2 / F|.

[0073] Furthermore, the following condition is satisfied between the central curvature radius R1 of the first side surface of the first lens and the overall focal length value F of the optical lens: R1 / F ≤ 5.

[0074] Furthermore, the following condition is satisfied between the central curvature radius R1 of the first side surface of the first lens and the overall focal length value F of the optical lens: R1 / F ≤ 3.

[0075] Furthermore, the following condition is satisfied between the central thickness d11 of the sixth lens and the overall optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging surface: d11 / TTL ≤ 0.35.

[0076] Furthermore, the following condition is satisfied between the central thickness d11 of the sixth lens and the overall optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging surface: d11 / TTL ≤ 0.2.

[0077] Furthermore, the following condition is satisfied between the overall focal length value F of the optical lens and the optical back focal length of the optical lens, i.e., the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging surface: F / BFL ≤ 3.

[0078] Furthermore, the following condition is satisfied between the focal length F6 of the sixth lens and the focal length F7 of the seventh lens: -20 ≤ F6 / F7 ≤ -0.15.

[0079] Furthermore, the following condition is satisfied between the focal length F6 of the sixth lens and the focal length F7 of the seventh lens: -10 ≤ F6 / F7 ≤ -0.3.

[0080] Furthermore, the following condition is satisfied between the central curvature radius R1 of the first side surface of the first lens and the central curvature radius R2 of the second side surface of the first lens: R1 / R2 ≤ 6.

[0081] Furthermore, the following condition is satisfied between the central curvature radius R1 of the first side of the first lens and the central curvature radius R2 of the second side of the first lens: 0.5 ≤ R1 / R2 ≤ 5.

[0082] Furthermore, the following condition is satisfied between the central curvature radius R6 of the second side of the third lens and the central curvature radius R5 of the first side of the third lens: 0.5 ≤ |R6 / R5|.

[0083] Furthermore, the following condition is satisfied between the central curvature radius R6 of the second side of the third lens and the central curvature radius R5 of the first side of the third lens: 0.8 ≤ |R6 / R5|.

[0084] Furthermore, the following condition is satisfied between the central curvature radius R7 of the first side of the fourth lens and the central curvature radius R8 of the second side of the fourth lens: 0.7 ≤ |R7 / R8| ≤ 3.

[0085] Furthermore, the following condition is satisfied between the central curvature radius R7 of the first side of the fourth lens and the central curvature radius R8 of the second side of the fourth lens: 0.85 ≤ |R7 / R8| ≤ 2.5.

[0086] Furthermore, the following condition is satisfied between the central curvature radius R4 of the second side of the second lens and the central curvature radius R5 of the first side of the third lens: R4 / R5 < 0.

[0087] Furthermore, the following condition is satisfied between the central curvature radius R4 of the second side of the second lens and the central curvature radius R5 of the first side of the third lens: -5 ≤ R4 / R5 ≤ -0.2.

[0088] Furthermore, the following condition is satisfied between the central curvature radius R10 of the second side of the fifth lens and the central curvature radius R9 of the first side of the fifth lens: 1.5 ≤ |R10 / R9|.

[0089] Furthermore, the following condition is satisfied between the central curvature radius R10 of the second side of the fifth lens and the overall focal length value F of the optical lens: 1.5 ≤ |R10 / F|.

[0090] Furthermore, the following condition is satisfied between the central curvature radius R10 of the second side of the fifth lens and the overall focal length value F of the optical lens: 2 ≤ |R10 / F|.

[0091] Furthermore, the following condition is satisfied between the overall focal length value F of the optical lens and the overall optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging surface of the optical lens: F / TTL ≤ 0.35.

[0092] According to another aspect of the present invention, an electronic device is further provided, including the above optical lens and an imaging element for converting the optical image formed by the optical lens into an electrical signal.

[0093] Applying the technical solution of the present invention, the optical lens sequentially includes a first lens with a negative optical power, a second lens with an optical power, a third lens with a positive optical power, a fourth lens with a positive optical power, a fifth lens with a negative optical power, a sixth lens with a positive optical power, and a seventh lens with an optical power along the optical axis from the first side to the second side. The first side of the first lens is convex, and the second side is concave; the first side of the second lens is concave, and the second side is convex; the first side of the third lens is convex; the first side of the fourth lens is convex, and the second side is convex; the first side of the fifth lens is concave; the second side of the sixth lens is convex.

[0094] The first lens has a negative optical power. The first side of the first lens is convex, and the second side is concave. Such a setting can collect as much light in a large field of view as possible and enter the rear optical system, increase the light transmission amount, and fix the direction trend of the large-angle light at the edge; the first side of the first lens is set to be convex, which is beneficial to the sliding of water droplets in actual use environments such as rainy and snowy weather, reducing the impact on imaging; the second side of the first lens is concave, which is beneficial to reducing the height of the outgoing light and the aperture, realizing miniaturization. The meniscus shape of the first lens is beneficial to increasing the resolution of the small field of view, redistributing the image height, and realizing special central distortion.

[0095] The optical power of the second lens can be positive or negative. The first side of the second lens is concave, and the second side is convex. When the second lens has a negative optical power, it is beneficial to smoothly receive the light entering through the first lens, making the light diverge and transition smoothly. The first side of the second lens is concave, and the light transmitted by the first lens can be further diverged after passing through the first side of the second lens, making the light converge slowly at the rear end, and the light at the edge field of view shows an upward trend, which is beneficial to matching with a large chip when paired with the first lens. When the second lens has a positive optical power, it has a converging effect on the light. Under the condition of the same field of view angle, the shape convex toward the second side is beneficial to appropriately converge the light and reduce the loss of large-angle light. At the same time, the second side of the second lens is convex, which cooperates with the convex first side of the third lens, making the light emitted from the second lens enter the first side of the third lens gently, facilitating the smooth transition of the light, reducing the light energy loss, being beneficial to the illuminance of the peripheral field of view, and changing the trend of the edge light at the same time, realizing the reduction of the front aperture of the optical lens, reducing the volume, and being beneficial to miniaturization and cost reduction.

[0096] The third lens has a positive optical power. The first side of the third lens is convex, and the second side can be convex or concave. When the second side of the third lens is convex, its shape is biconvex and the lens shape is gentle. With the positive optical power, a large temperature change has a small impact on the focal length of the third lens, which is beneficial for the entire optical system to maintain stable performance within a large temperature change range. The convex-convex surface type of the third lens and the concave-convex shape of the second lens are conducive to the smooth transition of light into the rear lens, improving the resolution. When the second side of the third lens is concave, combined with the positive optical power and the convex first side, it receives the light from the second lens, making the light trend gentle and reducing the generation of higher-order aberrations. The second side is concave, changing the light exit trend, enabling the divergent light to smoothly enter the rear and evenly incident on the fourth lens, which is beneficial for obtaining a large image plane and high resolution.

[0097] The fourth lens has a positive optical power. The first side of the fourth lens is convex, and the second side is convex. The fourth lens has a positive optical power, which converges the light. At the same time, it can make the light converge on the imaging plane more smoothly, which can improve the astigmatism and field curvature of the image and enhance the resolution ability of the optical system. The shape of the fourth lens is biconvex and the curvature radii on both sides of the lens are close, enabling the light that is divergent in the front to converge smoothly and then enter the rear smoothly, further making the light trend transition smoothly.

[0098] The fifth lens has a negative optical power. The first side of the fifth lens is concave, and the second lens can be concave or convex. When the second side of the fifth lens is concave, combined with the negative optical power, it is conducive to the smooth transition of the optical path difference between the marginal field and the central field. The fifth lens is of a biconcave type, especially with the first side being concave, which makes the light have an obvious light turn after exiting. The marginal light and the central light of each field are clearly distinguishable, changing the trend of the marginal light, which is beneficial for the aberration correction of the central and marginal light of each field and conducive to achieving high resolution. When the second side of the fifth lens is convex, the fifth lens has a negative optical power, and the light trend is smooth, which can improve the astigmatism and field curvature of the image and enhance the resolution ability of the optical system. The shape of the fifth lens is convex-concave, and the lens shape is gentle. A large temperature change has a small impact on the focal length of the fifth lens, which is beneficial for the entire optical system to maintain stable performance within a large temperature change range. The second side of the fifth lens uses a convex surface, which is beneficial for increasing the cone angle of the light when it reaches the imaging plane and reducing the main ray incident angle.

[0099] The sixth lens has a positive focal power. The first side of the sixth lens can be convex or concave, and the second side is convex. When the first side of the sixth lens is convex, it has a positive focal power and the lens surface type is convex-convex, with a gentle shape, enabling the divergent light to smoothly enter the rear, further making the light trend transition smoothly, which can improve the astigmatism and field curvature of the imaging and enhance the resolution ability of the optical system. When the first side of the sixth lens is concave, the positive focal length of the sixth lens, in combination with the negative focal length of the fifth lens, is beneficial for collecting the light entering through the fifth lens and making the light trend transition smoothly. When the first side of the sixth lens is concave, the light transmitted by the fifth lens can be further diverged after passing through the first side of the sixth lens, making the light convergence at the rear end slower, and the light in the peripheral field of view shows an upward trend, which is beneficial for matching with a large chip when combined with the first two lenses.

[0100] The seventh lens can have a positive focal power or a negative focal power. When the seventh lens has a negative focal power, it collects the light emerging from the sixth lens, which is beneficial for moderately diverging the light in the front and matching with a large chip. When the seventh lens has a positive focal power, it is beneficial for controlling the angle of the light incident on the chip and improving the resolution quality.

[0101] This application uses seven lenses. By optimizing the settings of the focal power and surface type of each lens, etc., the optical lens of the present invention has at least one beneficial effect such as high resolution, miniaturization, high relative illumination, low sensitivity, good temperature performance, short focal length, large angular resolution in the central region, and high luminous flux. BRIEF DESCRIPTION OF THE DRAWINGS

[0102] The specification drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0103] Figure 1 Shows a schematic structural diagram of the optical lens of Example 1 of the present invention;

[0104] Figure 2 Shows a schematic structural diagram of the optical lens of Example 2 of the present invention;

[0105] Figure 3 Shows a schematic structural diagram of the optical lens of Example 3 of the present invention;

[0106] Figure 4 Shows a schematic structural diagram of the optical lens of Example 4 of the present invention;

[0107] Figure 5 Shows a schematic structural diagram of the optical lens of Example 5 of the present invention;

[0108] Figure 6 Shows a schematic structural diagram of the optical lens of Example 6 of the present invention;

[0109] Figure 7 Shows a schematic structural diagram of the optical lens of Example Seven of the present invention;

[0110] Figure 8 Shows a schematic structural diagram of the optical lens of Example Eight of the present invention;

[0111] Figure 9 Shows a schematic structural diagram of the optical lens of Example Nine of the present invention;

[0112] Figure 10 Shows a schematic structural diagram of the optical lens of Example Ten of the invention;

[0113] Figure 11 Shows a schematic structural diagram of the optical lens of Example Eleven of the invention;

[0114] Figure 12 Shows a schematic structural diagram of the optical lens of Example Twelve of the present invention.

[0115] Among them, the above-mentioned drawings include the following reference numerals:

[0116] L1, the first lens; S1, the first side of the first lens; S2, the second side of the first lens; L2, the second lens; S3, the first side of the second lens; S4, the second side of the second lens; L3, the third lens; S5, the first side of the third lens; S6, the second side of the third lens; STO, the aperture stop; L4, the fourth lens; S8, the first side of the fourth lens; S9, the second side of the fourth lens; L5, the fifth lens; S9, the first side of the fifth lens; S10, the second side of the fifth lens; L6, the sixth lens; S11, the first side of the sixth lens; S12, the second side of the sixth lens; L7, the seventh lens; S13, the first side of the seventh lens; S14, the second side of the seventh lens; S15, the first side of the protective glass; S16, the second side of the protective glass; IMA, the imaging surface. Detailed Description of the Invention

[0117] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0118] It should be pointed out that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs.

[0119] In the present invention, unless otherwise specified, the orientation terms such as "upper, lower, top, bottom" generally refer to the directions shown in the drawings or to the vertical, perpendicular or gravitational directions of the components themselves; similarly, for the sake of easy understanding and description, "inner, outer" refer to the inner and outer of the contours of the respective components themselves, but the above orientation terms are not used to limit the present invention.

[0120] It should be noted that in this specification, the expressions such as 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 teachings of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0121] In the drawings, for the sake of easy explanation, the thickness, size and shape of the lens have been slightly exaggerated. Specifically, the spherical or aspherical shapes shown in the drawings are shown by way of example. That is, the spherical or aspherical shapes are not limited to the spherical or aspherical shapes shown in the drawings. The drawings are only examples and are not drawn strictly to scale.

[0122] In this text, 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 shape of each lens near the first side becomes the first side surface of the lens, and the surface of each lens near the second side is called the second side surface of the lens. The judgment of the surface shape in the paraxial region can be based on the judgment method of those with ordinary knowledge in the field, and the positive and negative of the R value (R refers to the radius of curvature in the paraxial region, usually the R value on the lens database (lens data) in optical software) is used to judge the convexity and concavity. For the first side surface, when the R value is positive, it is judged to be convex, and when the R value is negative, it is judged to be concave; for the second side surface, when the R value is positive, it is judged to be concave, and when the R value is negative, it is judged to be convex.

[0123] It should be noted that the left side of the optical lens is the first side, and the right side of the optical lens is the second side.

[0124] In an exemplary embodiment, the optical lens provided by the present application can be used as a vehicle-mounted lens. For a vehicle-mounted lens, the left side is the object side, and the right side is the image side; the first side is the object side, and the second side is the image side. The light rays from the object side can form an image on the image side.

[0125] When the optical lens of the present application is applied to a projection lens or a radar transmitting lens, the left side is the imaging side and the right side is the image source side. In an exemplary embodiment, the optical lens provided by the present application can be used as, for example, a projection lens or a lidar transmitting lens. At this time, the image side of the optical lens can be the image source side, and the object side can be the imaging side. The light from the image source side can be imaged on the imaging side, and the imaging surface of the optical lens is the image source surface.

[0126] In order to solve the problem that it is difficult to simultaneously take into account high resolution, good temperature performance, high light flux, and miniaturization in the existing optical lens, the present invention provides an optical lens and an electronic device.

[0127] Embodiment 1

[0128] As Figures 1 to 12 shown, the optical lens sequentially includes a first lens with a negative optical power, a second lens with an optical power, a third lens with a positive optical power, a fourth lens with a positive optical power, a fifth lens with a negative optical power, a sixth lens with a positive optical power, and a seventh lens with an optical power along the optical axis from the first side to the second side. The first side of the first lens is convex, and the second side is concave; the first side of the second lens is concave, and the second side is convex; the first side of the third lens is convex; the first side of the fourth lens is convex, and the second side is convex; the first side of the fifth lens is concave; the second side of the sixth lens is convex.

[0129] The first lens has a negative optical power. The first side of the first lens is convex, and the second side is concave. Such a setting can collect as much light in the large field of view as possible and enter the rear optical system, increasing the light flux and fixing the direction trend of the large-angle light at the edge; the first side of the first lens is set to be convex, which is beneficial to the sliding of water droplets in actual use environments such as rainy and snowy weather, reducing the impact on imaging; the second side of the first lens is concave, which is beneficial to reducing the height of the outgoing light and reducing the aperture to achieve miniaturization. The meniscus shape of the first lens is beneficial to increasing the resolution of the small field of view, redistributing the image height, and realizing special central distortion. At the same time, the first lens is preferably an aspherical lens, which can further improve the resolution quality. The above-mentioned small field of view refers to the field of view of 0° to 20°.

[0130] The optical power of the second lens can be positive or negative. The first side of the second lens is concave, and the second side is convex. When the second lens has a negative optical power, it is beneficial to smoothly receive the light entering through the first lens, causing the light to diverge and transition smoothly. Since the first side of the second lens is concave, the light transmitted by the first lens can be further diverged after passing through the first side of the second lens, causing the light at the rear end to converge more slowly and the light in the peripheral field of view to show an upward trend. When paired with the first lens, it is beneficial to be paired with a large chip. When the second lens has a positive optical power, it converges the light. Under the condition of the same field of view angle, the shape convex towards the second side is beneficial to appropriately converge the light and reduce the loss of large-angle light. At the same time, since the second side of the second lens is convex, when combined with the convex first side of the third lens, the light emerging from the second lens can be smoothly incident on the first side of the third lens, facilitating the smooth transition of the light, reducing the loss of light energy, improving the illuminance of the peripheral field of view, changing the trend of the marginal light at the same time, achieving a reduction in the front-end aperture of the optical lens, reducing the volume, and being beneficial to miniaturization and cost reduction.

[0131] The third lens has a positive optical power. The first side of the third lens is convex, and the second side can be convex or concave. When the second side of the third lens is convex, its shape is double convex and the lens shape is gentle. When paired with the positive optical power, a relatively large temperature change has a small impact on the focal length of the third lens, which is beneficial for the entire optical system to maintain stable performance within a relatively large temperature change range; the convex-convex shape of the third lens and the concave-convex shape of the second lens are beneficial for the light to smoothly transition into the rear lens, improving the resolution. When the second side of the third lens is concave, when paired with the positive optical power and the convex first side, it receives the light from the second lens, causing the light to have a gentle trend, reducing the generation of high-order aberrations. Since the second side is concave, it changes the trend of the light emerging, enabling the diverging light to smoothly enter the rear and evenly incident the light on the fourth lens, which is beneficial for obtaining a large image plane and high resolution.

[0132] The fourth lens has a positive optical power. The first side of the fourth lens is convex, and the second side is convex. The fourth lens having a positive optical power converges the light and at the same time enables the light to converge on the imaging plane more smoothly, which can improve the astigmatism and field curvature of the imaging and enhance the resolution ability of the optical system. The shape of the fourth lens is double convex and the curvature radii on both sides of the lens are close, enabling the light with a divergent trend in the front to converge more smoothly and then enter the rear smoothly, further making the trend of the light transition smoothly.

[0133] The fifth lens has negative optical power, the first side of the fifth lens is concave, and the second lens can be concave or convex. When the second side of the fifth lens is concave, with negative optical power, it is conducive to the smooth transition of the optical path difference between the edge field of view and the central field of view. The fifth lens is a double concave type, especially the first side is concave, so that there is a clear light turning after the light is emitted, the edge light and the central light of each field of view are clearly distinguished, the trend of the edge light is changed, and the aberration correction of the center and edge light of each field of view is facilitated, and it is conducive to achieving high resolution. When the second side of the fifth lens is convex, the fifth lens has negative optical power, the light trend is stable, the astigmatism and field curvature of the imaging can be improved, and the resolution ability of the optical system is improved; the shape of the fifth lens is concave-convex, the lens shape is gentle, and the large temperature change has little effect on the focal length of the fifth lens, which is conducive to the entire optical system to maintain stable performance within a large temperature change range; the second side of the fifth lens adopts a convex surface, which is conducive to increasing the cone angle when the light reaches the imaging surface and reducing the incident angle of the main light.

[0134] The sixth lens has positive focal power, and the first side of the sixth lens can be convex or concave, and the second side is convex. When the first side of the sixth lens is convex, the positive focal power and the lens surface are convex-convex with a gentle shape, so that the divergent light can enter the rear smoothly, and further make the light trend smoothly transition, which can improve the astigmatism and field curvature of the imaging and improve the resolution ability of the optical system. When the first side of the sixth lens is concave, the positive focal length of the sixth lens, combined with the negative focal length of the fifth lens, is conducive to collecting the light entering through the fifth lens and making the light trend smoothly transition. The first side of the sixth lens is concave, and the light transmitted from the fifth lens can continue to diverge after passing through the first side of the sixth lens, so that the light at the rear end converges more slowly, and the light at the edge of the field of view shows an upward trend. It is beneficial to match it with the first two lenses with large chips.

[0135] The seventh lens can have positive or negative focal power. When the seventh lens has negative focal power, it collects the light emitted by the sixth lens, which is conducive to moderately diverging the front light and matching the large chip. When the seventh lens has positive focal power, it is conducive to controlling the angle of the light incident on the chip and improving the resolution quality.

[0136] The present application adopts seven lenses, and by optimizing the optical focal length and surface shape of each lens, the optical lens of the present invention has at least one beneficial effect of high resolution, miniaturization, high relative illumination, low sensitivity, good temperature performance, short focus, large angular resolution in the central area and high luminous flux.

[0137] In this embodiment, the second lens has a negative optical power. Such a configuration is conducive to smoothly receiving the light entering through the first lens and smoothly diverging it, so that the light transitions smoothly.

[0138] In this embodiment, the second lens has positive refractive power and has a convergence effect on light. Under the same viewing angle condition, the shape convex toward the second side is conducive to properly converging the light and reducing the loss of large-angle light.

[0139] In this embodiment, the second side surface of the third lens is convex. The shape is biconvex and the lens shape is gentle, and with positive focal power, a large temperature change has a small effect on the focal length of the third lens, which is beneficial for the entire optical system to maintain stable performance within a large temperature change range; the convex-convex surface of the third lens and the concave-convex shape of the second lens are beneficial for the smooth transition of light into the rear lens, thereby improving the resolution.

[0140] In this embodiment, the second side surface of the third lens is a concave surface. With the positive focal power and the convex first side surface, the light from the second lens is received, the light trend is smoothed, and the generation of high-order aberrations is reduced. The second side surface is a concave surface, which changes the light emission trend, so that the divergent light enters the rear smoothly, and the light is evenly incident on the fourth lens, which is conducive to obtaining a large image surface and high resolution.

[0141] In this embodiment, the second side surface of the fifth lens is concave. With negative optical power, it is conducive to the smooth transition of the optical path difference between the edge field of view and the central field of view. The fifth lens is a biconcave type, especially the first side surface is concave, so that there is a clear light turning after the light is emitted, and the edge light and the central light of each field of view are clearly distinguished, which changes the trend of the edge light, is conducive to the aberration correction of the center and edge light of each field of view, and is conducive to achieving high resolution.

[0142] In this embodiment, the second side surface of the fifth lens is a convex surface. The fifth lens has negative optical power, and the light trend is stable, which can improve the astigmatism and field curvature of the imaging and improve the resolution ability of the optical system; the fifth lens is concave-convex, and the lens shape is gentle. A large temperature change has a small effect on the focal length of the fifth lens, which is conducive to the entire optical system to maintain stable performance within a large temperature change range; the second side surface of the fifth lens is a convex surface, which is conducive to increasing the cone angle when the light reaches the imaging surface and reducing the incident angle of the main light.

[0143] In this embodiment, the first side surface of the sixth lens is a convex surface. The lens surface is convex-convex with positive focal power and a gentle shape, so that the divergent light can smoothly enter the rear, further making the light trend smoothly transition, which can improve the astigmatism and field curvature of the imaging and improve the resolution of the optical system.

[0144] In this embodiment, the first side surface of the sixth lens is concave. The positive focal length of the sixth lens, in combination with the negative focal length of the fifth lens, is conducive to collecting the light entering through the fifth lens, enabling a smooth transition in the light path. The first side surface of the sixth lens being concave can further diverge the light transmitted by the fifth lens after passing through the first side surface of the sixth lens, causing the light at the rear end to converge more slowly and the light in the peripheral field of view to show an upward trend, which is beneficial for matching with a large chip when combined with the first two lenses.

[0145] In this embodiment, the seventh lens has a negative optical power. The first side surface of the seventh lens is convex, and the second side surface is concave. This is conducive to the light entering the imaging surface smoothly, improving the resolution; at the same time, various aberrations of the optical system can be fully corrected. On the premise of a compact structure, the resolution can be improved, and optical performance such as distortion and CRA can be optimized.

[0146] In this embodiment, the seventh lens has a negative optical power. The first side surface of the seventh lens is concave, and the second side surface is concave. The negative optical power of the seventh lens collects the light emitted from the biconvex lens of the sixth lens, facilitating a moderate divergence of the light in the front, which is suitable for matching with a large chip. The first side surface of the seventh lens being concave means that the light in the peripheral field of view will have a greater optical path than the light in the central field of view, changing the light path of the light in the peripheral field of view and making it more concentrated when reaching the imaging surface, correcting the off-axis aberration of the peripheral field of view and achieving high resolution.

[0147] In this embodiment, the seventh lens has a positive optical power. The first side surface of the seventh lens is convex, and the second side surface is convex. The positive optical power of the seventh lens, with the biconvex design, is conducive to controlling the angle of the light incident on the chip and improving the imaging quality.

[0148] In this embodiment, the fourth lens and the fifth lens are cemented to form a doublet lens. The use of the cemented lens can effectively correct chromatic aberration, reduce the total length of the lens, and at the same time enable the light to transition smoothly to the rear system, which can optimize the performance of the optical system such as CRA, illuminance, and distortion. The fourth lens has a positive optical power, collects the light entering through the fourth lens, and makes the light trend transition smoothly to the rear, reducing the height of the light incident on the rear; the fifth lens has a negative optical power, and the marginal rays and central rays of each field of view are clearly distinguishable, which is beneficial to the aberration correction of the central and marginal rays of each field of view and is conducive to achieving high resolution. The fifth lens uses a material with a high refractive index and a low Abbe number, and the fourth lens uses a material with a relatively low refractive index and a high Abbe number. The lenses made of the two materials are cemented together, which can effectively correct the chromatic aberration of the optical system; at the same time, it can reduce the assembly components between the fourth lens and the fifth lens, which is beneficial to reducing the process and the overall weight, and reducing the cost; at the same time, it reduces the light energy loss caused by reflection between the lenses, improves the image plane illuminance, and weakens the ghost image; since the light transitions smoothly when passing through the cemented surface, it is less sensitive to tolerances such as eccentricity and tilt between the two lenses, so the tolerance sensitivity during lens assembly can be reduced; it can reasonably distribute the focal length, and both lenses are made of glass, which helps to achieve thermal compensation and improve the performance of the lens at different temperatures.

[0149] In this embodiment, the first lens, the second lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens are all aspherical lenses. By reasonably setting the aspherical lenses, it is beneficial to have a large angular resolution in the central region and improve the resolution; it is beneficial to improve the field curvature and astigmatism and enhance the resolution ability.

[0150] In this embodiment, the optical lens further includes a diaphragm, and the diaphragm is arranged between the third lens and the fourth lens. Such an arrangement is beneficial to the effective convergence of the light entering the optical system, reduces the lens aperture at the rear end of the optical system, and reduces the assembly sensitivity of the system.

[0151] In this embodiment, at least one of the first lens, the second lens, the fifth lens, the sixth lens, and the seventh lens is provided with a reverse curvature. Selecting a reverse curvature for some lenses is beneficial to balancing aberrations and improving the resolution.

[0152] In this embodiment, the relationship among the maximum field of view angle FOV of the optical lens, the overall focal length value F of the optical lens, and the image height H corresponding to the maximum field of view angle of the optical lens satisfies: (FOV×F) / H ≤ 80. Meeting this conditional formula, when the image height is constant, a smaller focal length and a larger field of view angle will not only affect the imaging effect of the central area of the optical lens, but also affect the distortion of the peripheral field of view; a larger focal length affects the imaging effect of the peripheral field of view and the performance of the entire optical system. Therefore, the ratio of the focal length of the optical lens to the image height can be limited within a reasonable range, thereby improving the resolution of the optical lens and meeting the requirements of short focal length, large target surface, and large image height at the same time. Preferably, 30 ≤ (FOV×F) / H ≤ 70. With such a setting, when the image height is constant, the smaller the focal length and the larger the field of view angle, and through the reasonable constraint of this conditional formula, the resolution can be better improved, while meeting the advantages of short focal length, large target surface, and large image height. More preferably, 40 ≤ (FOV×F) / H ≤ 65. Even more preferably, 44 ≤ (FOV×F) / H ≤ 58.

[0153] In this embodiment, the relationship among the overall optical length of the optical lens, that is, the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging surface of the optical lens, the radian value θ of the maximum field of view angle of the optical lens, and the image height H corresponding to the maximum field of view angle of the optical lens satisfies: TTL / H / θ ≤ 2. Meeting this conditional formula, when the image height and the field of view are determined, the TTL of the optical system is shorter, and miniaturization of the optical lens can be achieved. Preferably, TTL / H / θ ≤ 1.8. More preferably, TTL / H / θ ≤ 1.6. Even more preferably, TTL / H / θ ≤ 1.45. When the image height and the field of view are determined, the smaller the TTL / H / θ, the smaller the TTL, and the better the miniaturization effect.

[0154] In this embodiment, the relationship among the maximum aperture diameter D of the first side surface of the first lens corresponding to the maximum field of view angle of the optical lens, the image height H corresponding to the maximum field of view angle of the optical lens, and the radian value θ of the maximum field of view angle of the optical lens satisfies: D / H / θ ≤ 0.9. Meeting this conditional formula, when the image height H corresponding to the maximum field of view angle of the optical lens and the radian value θ corresponding to the image height of the maximum field of view angle remain unchanged, ensuring a small front aperture diameter can achieve miniaturization. Preferably, D / H / θ ≤ 0.8. More preferably, D / H / θ ≤ 0.7. Even more preferably, D / H / θ ≤ 0.6. The smaller the D / H / θ, the smaller the front aperture diameter, and the better the miniaturization effect.

[0155] In this embodiment, the overall focal length value F of the optical lens and the image height H corresponding to the maximum field of view angle of the optical lens satisfy: F / H ≤ 0.8. When the image height is constant, the smaller the focal length, the greater the distortion, which will not only affect the imaging effect of the central area of the optical lens, but also affect the distortion of the peripheral field of view; the distortion of the edge field of view will increase as the focal length value F decreases, which is not conducive to achieving the effect of small distortion, affecting the imaging effect of the peripheral field of view and the performance of the entire optical system. Therefore, the ratio of the focal length to the image height of the optical lens can be limited within a reasonable range, thereby improving the resolution of the optical lens. Preferably, 0.25 ≤ F / H ≤ 0.7. More preferably, 0.3 ≤ F / H ≤ 0.6. More preferably, 0.4 ≤ F / H ≤ 0.55. Controlling F / H within a more preferable range makes the resolution ability of the optical lens better.

[0156] In this embodiment, the diaphragm aperture DST and the overall focal length value F of the optical lens satisfy: DST / F ≤ 1.5. The larger the ratio of the diaphragm aperture to the effective focal length, the larger the aperture of the optical lens, and a large amount of light can enter under the same incident light, ensuring that the actual use image is brighter. Preferably, 0.6 ≤ DST / F ≤ 1.2. More preferably, 0.7 ≤ DST / F ≤ 1.0. More preferably, 0.75 ≤ DST / F ≤ 0.95. Controlling DST / F within a more preferable range makes the aperture of the optical lens larger, the amount of light entering more sufficient, and the imaging image brighter.

[0157] In this embodiment, the opening angle arctan(1 / K(S2)) of the second side of the first lens and the overall focal length value F of the optical lens satisfy: 15 ≤ arctan(1 / K(S2)) / F. Satisfying this conditional formula ensures that the opening angle of the second side of the first lens is larger, which is beneficial to reducing the effective aperture height of the light rays exiting from this surface. Lower effective light rays are beneficial to reducing the magnification of large-angle light rays by the lens, thereby reducing chromatic aberration and improving resolution, and at the same time achieving a short focal length for the entire system. Preferably, 18 ≤ arctan(1 / K(S2)) / F ≤ 40. Such a setting is more conducive to achieving a small aperture and miniaturization, highlighting the imaging effect of the central area. More preferably, 20 ≤ arctan(1 / K(S2)) / F ≤ 35. More preferably, 20 ≤ arctan(1 / K(S2)) / F ≤ 30. It should be noted here that K is the slope of the tangent line of the edge of the first lens on the second side at the maximum field of view angle.

[0158] In this embodiment, the image height H corresponding to the maximum field of view angle of the optical lens, the overall focal length value F of the optical lens, and the radian value θ of the maximum field of view angle of the optical lens satisfy: 0.5 ≤ (H / 2) / (F * tan(θ / 2)) ≤ 0.9. Meeting this conditional formula ensures that, with the field of view angle and the size of the imaging surface remaining unchanged, the optical focal length of the system is reduced, high angular resolution is achieved, and the imaging effect and clarity of the central region of the optical lens are emphasized. Preferably, 0.6 ≤ (H / 2) / (F * tan(θ / 2)) ≤ 0.9. More preferably, 0.65 ≤ (H / 2) / (F * tan(θ / 2)) ≤ 0.86. This conditional formula is more preferably controlled, which is more conducive to achieving high angular resolution and emphasizing the imaging effect and clarity of the central region of the optical lens.

[0159] In this embodiment, the central thickness d8 of the fourth lens, the central thickness d9 of the fifth lens, and the overall optical length of the optical lens, that is, the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging surface of the optical lens, satisfy: (d8 + d9) / TTL ≤ 0.4. Reasonably controlling the mutual relationship between the central thickness of the doublet lens on the optical axis and the overall optical length of the optical lens. If the proportion of the central thickness of the doublet lens is too large, the light control ability of the front lens is reduced, the light at the large-angle entrance pupil position is restricted at the front lens, and the relative illumination is low. Preferably, 0.08 ≤ (d8 + d9) / TTL ≤ 0.3. With such a setting, while the overall optical length of the optical lens remains unchanged, the central thickness of the doublet lens is reasonably set, which can further enhance the light control ability of the optical lens, is conducive to controlling more light to enter the rear system, and further improves the relative illumination. More preferably, 0.12 ≤ (d8 + d9) / TTL ≤ 0.2.

[0160] In this embodiment, the central curvature radius R3 of the first side of the second lens and the central curvature radius R4 of the second side of the second lens satisfy: 0 < R3 / R4 ≤ 2.5. The special shape setting of the second lens ensures that the R values of both sides are within a certain range, which is conducive to the smooth transition of the optical path of light passing through the lens and reduces the system sensitivity. Preferably, 0.25 ≤ R3 / R4 ≤ 2. Such a setting is more conducive to further improving the resolution ability. More preferably, 0.5 ≤ R3 / R4 ≤ 1.5. More preferably, 0.6 ≤ R3 / R4 ≤ 1.2.

[0161] In this embodiment, the focal length F2 of the second lens and the overall focal length value F of the optical lens satisfy: 5 ≤ |F2 / F|. The second lens is preferably a plastic lens. Since the second lens has a relatively large focal length and a small light deflection ability, it can make the light enter the rear optical system smoothly, which is beneficial to collecting the light in the peripheral field of view. Preferably, 8 ≤ |F2 / F|. With such a setting, when the temperature is high, the photosensitive chip of the optical lens moves backward, and the change rate of the optical power of the second lens is small, which can better control the thermal compensation amount of the entire optical lens, and is more conducive to the optical lens maintaining good resolution at high and low temperatures and ensuring good temperature performance. More preferably, 8 ≤ |F2 / F| ≤ 200. More preferably, 8 ≤ |F2 / F| ≤ 150.

[0162] In this embodiment, the central curvature radius R1 of the first side of the first lens and the overall focal length value F of the optical lens satisfy: R1 / F ≤ 5. Such a setting is beneficial to ensuring that the first side of the first lens is a convex surface and has a relatively small curvature radius, which is beneficial to collecting the incident light and reducing the height of the incident light, so that the height of the light entering the first lens is reduced, and the front aperture is reduced; since the first side is a convex surface, the height of the light exiting through the second side of the first lens is compressed, and the position where the light enters the second lens is relatively low, which is beneficial to reducing the magnification of the large-angle light by the lens, thereby reducing chromatic aberration, reducing the aberration caused by the light entering through the second lens, improving the resolution, and at the same time making the lens structure compact and beneficial to miniaturization. Preferably, R1 / F ≤ 3. With such a setting, the first side of the first lens is a convex surface and has a relatively small curvature radius, which can better ensure strong light processing ability, ensure that the light on the first side quickly deflects towards the optical axis after entering the first lens, is beneficial to reducing the front aperture, and can better take into account the short focal length of the entire system and improve the resolution of the small field of view. More preferably, 0.3 ≤ R1 / F ≤ 2.2. More preferably, 0.5 ≤ R1 / F ≤ 1.8.

[0163] In this embodiment, the central thickness d11 of the sixth lens and the overall optical length of the optical lens, that is, the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging surface of the optical lens satisfy: d11 / TTL ≤ 0.35. Constraining the central thickness of the sixth lens to be relatively thick and having a large proportion in the total length of the entire system is beneficial to the smooth transition of the light to the image plane and improving the resolution. Preferably, d11 / TTL ≤ 0.2. With such a setting, it is more beneficial to ensure the proportion of the sixth lens in the total length of the entire system and greatly improve the resolution ability. More preferably, d11 / TTL ≤ 0.15. More preferably, 0.08 ≤ d11 / TTL ≤ 0.15.

[0164] In this embodiment, the overall focal length value F of the optical lens and the optical back focal length of the optical lens, that is, the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging surface, satisfy: F / BFL ≤ 3. Reasonably controlling the relationship between the focal length and the back focal length helps to have a longer back focal length and achieve a short focal length for the entire system. A longer back focal length can ensure that the light rays exiting from the second side of the sixth lens and hitting the image surface have a relatively gentle trend, which is beneficial for the gentle transition of peripheral light rays, thereby reducing the sensitivity of the optical system and highlighting the imaging effect in the central region. Preferably, F / BFL ≤ 2.5. More preferably, 0.5 ≤ F / BFL ≤ 1.8. More preferably, 0.75 ≤ F / BFL ≤ 1.5. Controlling F / BFL within this more preferred range can better ensure that the back focal length of the optical lens is long enough, the effect of reducing sensitivity is more prominent, and the imaging effect in the central region can be better guaranteed.

[0165] In this embodiment, the focal length F6 of the sixth lens and the focal length F7 of the seventh lens satisfy: -20 ≤ F6 / F7 ≤ -0.15. Constraining the ratio of the focal lengths of the two lenses of the sixth lens and the seventh lens within a certain range results in a smaller change in the optical path passing through the two lenses at high and low temperatures, making the thermal contribution of the lenses at high and low temperatures close, which is beneficial for maintaining the performance stability of the entire optical system within a large temperature change range. Preferably, -10 ≤ F6 / F7 ≤ -0.3. Such a setting can better ensure that the thermal contributions of the two lenses at high and low temperatures are close, which is beneficial for ensuring the temperature performance stability. More preferably, -6 ≤ F6 / F7 ≤ -0.35. More preferably, -3 ≤ F6 / F7 ≤ -0.4.

[0166] In this embodiment, the central curvature radius R1 of the first side of the first lens and the central curvature radius R2 of the second side of the first lens satisfy: R1 / R2 ≤ 6. Constraining the ratio of the R values of the two surfaces of the first lens within a certain range forms a special lens shape, resulting in an optical path difference between the peripheral light rays and the central light rays, reducing the coupling of light rays in each field of view to the chip, making the imaging in each field of view clear, and simultaneously achieving a short focal length for the entire system. Preferably, 0.5 ≤ R1 / R2 ≤ 5. Such a setting is more conducive to the entry of light rays into the subsequent optical system, reducing the front aperture of the optical lens, reducing the volume, and being beneficial for miniaturization and cost reduction. More preferably, 1 ≤ R1 / R2 ≤ 4. More preferably, 1.5 ≤ R1 / R2 ≤ 3.

[0167] In this embodiment, the center curvature radius R6 of the second side surface of the third lens and the center curvature radius R5 of the first side surface of the third lens satisfy: 0.5 ≤ |R6 / R5|. By controlling the R values of the two side surfaces of the third lens, the third lens is made bi-convex and has a gentle lens shape. Among them, the curvature radius of the second side surface of the third lens is larger, which is beneficial to reducing the influence of a large temperature change on the focal length of the third lens, and is conducive to maintaining the performance stability of the entire optical system within a large temperature change range. Preferably, 1 ≤ |R6 / R5| ≤ 200. Such a setting can better ensure the temperature performance stability of the third lens. More preferably, 1.2 ≤ |R6 / R5| ≤ 160.

[0168] In this embodiment, the center curvature radius R7 of the first side surface of the fourth lens and the center curvature radius R8 of the second side surface of the fourth lens satisfy: 0.7 ≤ |R7 / R8| ≤ 3. By controlling the center curvature radii of the two side surfaces of the fourth lens, the curvature radii of the two sides of the fourth lens are made close to each other, which is beneficial to the gentle transition of light rays, reduces aberration, and improves the imaging quality. Preferably, 0.85 ≤ |R7 / R8| ≤ 2.5. Such a setting can better ensure that the fourth lens can ensure the gentle transition of light rays while optimizing aberration. More preferably, 1.0 ≤ |R7 / R8| ≤ 2. More preferably, 1.2 ≤ |R7 / R8| ≤ 1.8.

[0169] In this embodiment, the center curvature radius R4 of the second side surface of the second lens and the center curvature radius R5 of the first side surface of the third lens satisfy: R4 / R5 < 0. By controlling the center curvature radii of the second side surface of the second lens and the first side surface of the third lens, the surface types of the second side surface of the second lens and the first side surface of the third lens are made opposite to each other, so that the light rays emitted from the second lens are gently incident on the first side surface of the third lens, which is beneficial to the gentle transition of light rays; controlling R4 / R5 within a certain range is also beneficial to reducing light energy loss, improving the illuminance and imaging quality of the peripheral field of view, and further improving the resolution. Preferably, -5 ≤ R4 / R5 ≤ -0.2. Such a setting can better reduce light energy loss, better increase the illuminance and imaging quality of the peripheral field of view, and further improve the resolution. More preferably, -3 ≤ R4 / R5 ≤ -0.3. More preferably, -2.4 ≤ R4 / R5 ≤ -0.35.

[0170] In this embodiment, the central radius of curvature R10 of the second side surface of the fifth lens and the central radius of curvature R9 of the first side surface of the fifth lens satisfy: 1.5 ≤ |R10 / R9|. Controlling the ratio of the radii of curvature of both sides of the fifth lens within this range is conducive to the smooth trend of light rays, can improve the astigmatism and field curvature of imaging, and improve the resolution ability of the optical system. Preferably, 2 ≤ |R10 / R9|. More preferably, 2.5 ≤ |R10 / R9| ≤ 40. More preferably, 3 ≤ |R10 / R9| ≤ 25. Controlling this conditional expression to be more preferable can further improve astigmatism and field curvature, and the high resolution is more prominent.

[0171] In this embodiment, the central radius of curvature R10 of the second side surface of the fifth lens and the overall focal length value F of the optical lens satisfy: 1.5 ≤ |R10 / F|. The R value of the image side surface of the fifth lens is relatively large, ensuring that the shape of the fifth lens is relatively flat, which can reduce the height of the outgoing light rays on the lens, reduce the lens aperture, and make the outgoing light rays transition to the rear more smoothly, thereby weakening the system sensitivity. Preferably, 2 ≤ |R10 / F|. Such a setting can further reduce the aperture of the fifth lens and further weaken the system sensitivity. More preferably, 2.5 ≤ |R10 / F| ≤ 45. More preferably, 3 ≤ |R10 / F| ≤ 30.

[0172] In this embodiment, the overall focal length value F of the optical lens and the overall optical length of the optical lens, that is, the central distance TTL from the first side center of the first lens of the optical lens to the center of the imaging surface of the optical lens satisfy: F / TTL ≤ 0.35. When TTL is fixed, controlling the ratio of F to TTL to be small is conducive to achieving the short focal length effect of the entire system and highlighting the imaging effect of the small field of view angle in the central region. Preferably, F / TTL ≤ 0.3. More preferably, F / TTL ≤ 0.24. Controlling this conditional expression to be more preferable is more conducive to meeting the characteristics of short focal length and highlighting the imaging effect of the small field of view angle in the central region.

[0173] Embodiment 2

[0174] As Figures 1 to 12As shown in the figure, the optical lens sequentially includes, from the first side to the second side along the optical axis: a first lens with a negative focal power; a second lens with a focal power; a third lens with a positive focal power; a fourth lens with a positive focal power; a fifth lens with a negative focal power; a sixth lens with a positive focal power; a seventh lens with a focal power; wherein, the included angle arctan(1 / K(S2)) of the second side surface of the first lens and the overall focal length value F of the optical lens satisfy: 15≤arctan(1 / K(S2)) / F. Satisfying this conditional formula ensures that the included angle of the second side surface of the first lens is larger, which is beneficial to reducing the effective aperture height of the light rays exiting from this surface. Lower effective light rays are beneficial to reducing the magnification of large-angle light rays by the lens, thereby reducing chromatic aberration and improving resolution, and at the same time achieving a small aperture and miniaturization. Preferably, 18≤arctan(1 / K(S2)) / F≤40. Such a setting is more conducive to achieving a small aperture and miniaturization, and highlighting the imaging effect of the central region. More preferably, 20≤arctan(1 / K(S2)) / F≤35. More preferably, 20≤arctan(1 / K(S2)) / F≤30. It should be noted here that K is the slope of the tangent line of the edge of the first lens on the second side surface at the maximum field of view angle.

[0175] In this embodiment, the first side surface of the first lens is a convex surface, and the second side surface is a concave surface. Such a setting can collect as much large-field-of-view light as possible and enter the rear optical system, increasing the light transmission amount and fixing the direction trend of the large-angle light rays at the edge; the first side surface of the first lens is set as a convex surface, which is beneficial to the sliding of water droplets in actual use environments such as rainy and snowy weather, reducing the impact on imaging; the second side surface of the first lens is a concave surface, which is beneficial to reducing the height of the exiting light rays, reducing the aperture, and achieving miniaturization. The meniscus shape of the first lens is beneficial to increasing the resolution of the small field of view angle, redistributing the image height, and achieving special central distortion. At the same time, the first lens is preferably an aspherical lens, which can further improve the resolution quality. The above-mentioned small field of view angle refers to the field of view of 0° to 20°.

[0176] In this embodiment, the second lens has a negative focal power, the first side surface of the second lens is a concave surface, and the second side surface is a convex surface. It is beneficial to smoothly receive the light rays entering through the first lens, making the light rays diverge and transition smoothly. The first side surface of the second lens is a concave surface, which can continue to diverge the light rays transmitted by the first lens after passing through the first side surface of the second lens, making the light rays in the rear end converge more slowly, and the light rays in the edge field of view show an upward trend, which is beneficial to matching with a large chip when paired with the first lens.

[0177] In this embodiment, the second lens has positive focal power, the first side surface of the second lens is concave, and the second side surface is convex. It has a convergence effect on light, and under the same field of view angle, the shape convex to the second side is conducive to proper convergence of light and reducing the loss of large-angle light. At the same time, the second side surface of the second lens is convex, which cooperates with the convex surface of the first side surface of the third lens, so that the light emitted by the second lens is smoothly incident on the first side surface of the third lens, which is conducive to the smooth transition of light, can reduce light energy loss, and is conducive to the illumination of the peripheral field of view. At the same time, it changes the trend of edge light, realizes the reduction of the front port diameter of the optical lens, reduces the volume, and is conducive to miniaturization and cost reduction.

[0178] In this embodiment, the first side surface of the third lens is convex, and the second side surface is convex. The shape is biconvex and the lens shape is gentle, and with positive focal power, a large temperature change has a small effect on the focal length of the third lens, which is beneficial for the entire optical system to maintain stable performance within a large temperature change range; the convex-convex surface of the third lens and the concave-convex shape of the second lens are beneficial for the smooth transition of light into the rear lens, thereby improving the resolution.

[0179] In this embodiment, the first side surface of the third lens is convex, and the second side surface is concave. With the positive focal power and the convex first side surface, the light from the second lens is received, the light trend is smoothed, and the generation of high-order aberrations is reduced. The second side surface is concave, which changes the light emission trend, so that the divergent light enters the rear smoothly, and the light is evenly incident on the fourth lens, which is conducive to obtaining a large image surface and high resolution.

[0180] In this embodiment, the first side surface of the fourth lens is a convex surface, and the second side surface is a convex surface. The fourth lens has positive focal power, has a convergence effect on light, and can make the light converge more smoothly on the imaging surface, which can improve the astigmatism and field curvature of the imaging, and improve the resolution ability of the optical system. The shape of the fourth lens is double convex and the curvature radius of both sides of the lens is close, so that the light with a divergent trend in the front can converge more smoothly and then smoothly enter the back, further making the light trend transition smoothly.

[0181] In this embodiment, the first side surface of the fifth lens is concave, and the second side surface is concave. With negative optical power, it is conducive to the smooth transition of the optical path difference between the edge field of view and the central field of view. The fifth lens is a biconcave type, especially the first side surface is concave, so that there is a clear light turning after the light is emitted, and the edge light and the central light of each field of view are clearly distinguished, which changes the trend of the edge light, is conducive to the aberration correction of the center and edge light of each field of view, and is conducive to achieving high resolution.

[0182] In this embodiment, the first side of the fifth lens is concave, and the second side is convex. The fifth lens has a negative focal power. The light rays have a smooth path, which can improve the astigmatism and field curvature of the image formation and enhance the resolution of the optical system. The fifth lens has a concave-convex shape with a gentle lens shape, and a large temperature change has little effect on the focal length of the fifth lens, which is beneficial for the entire optical system to maintain stable performance within a large temperature change range. The second side of the fifth lens is convex, which is beneficial for increasing the cone angle of the light rays when they reach the imaging surface and reducing the incident angle of the chief ray.

[0183] In this embodiment, the first side of the sixth lens is convex, and the second side is convex. It has a positive focal power and a convex-convex lens surface shape with a gentle shape, enabling the diverging light rays to smoothly enter the rear, further making the light ray path transition smoothly, which can improve the astigmatism and field curvature of the image formation and enhance the resolution of the optical system.

[0184] In this embodiment, the first side of the sixth lens is concave, and the second side is convex. The positive focal length of the sixth lens, when combined with the negative focal length of the fifth lens, is beneficial for collecting the light rays that enter through the fifth lens and making the light ray path transition smoothly. The first side of the sixth lens is concave, which can continue to diverge the light rays transmitted by the fifth lens after passing through the first side of the sixth lens, making the light rays in the rear converge more slowly, and the light rays in the marginal field of view show an upward trend. When combined with the first two lenses, it is beneficial for matching with a large chip.

[0185] In this embodiment, the seventh lens has a negative focal power. The first side of the seventh lens is convex, and the second side is concave. This is beneficial for the light rays to gently enter the imaging surface and improve the resolution. At the same time, various aberrations of the optical system can be fully corrected. On the premise of a compact structure, the resolution can be improved, and optical performances such as distortion and CRA can be optimized.

[0186] In this embodiment, the seventh lens has a negative focal power. The first side of the seventh lens is concave, and the second side is concave. The negative focal power of the seventh lens collects the light rays emerging from the biconvex lens of the sixth lens, which is beneficial for moderately diverging the light rays in the front and matching with a large chip. The first side of the seventh lens is concave, and the light rays in the marginal field of view will have a greater optical path than those in the central field of view, changing the light ray path in the marginal field of view and making it more concentrated when reaching the imaging surface, correcting the off-axis aberration of the marginal field of view and achieving high resolution.

[0187] In this embodiment, the seventh lens has a positive focal power. The first side of the seventh lens is convex, and the second side is convex. The positive focal power of the seventh lens and the biconvex design are beneficial for controlling the angle of the light rays incident on the chip and improving the resolution quality.

[0188] This application uses seven lenses. By optimizing the optical power and surface shape of each lens, etc., the optical lens of the present invention has at least one beneficial effect such as high resolution, miniaturization, high relative illumination, low sensitivity, good temperature performance, short focal length, large angular resolution in the central region, and high luminous flux.

[0189] In this embodiment, the fourth lens and the fifth lens are cemented to form a doublet lens. The use of the cemented lens can effectively correct chromatic aberration, reduce the total length of the lens, and at the same time make the light transition smoothly to the rear system, which can optimize the performance of the optical system such as CRA, illumination, and distortion. The fourth lens has a positive optical power, collecting the light entering through the fourth lens, making the light trend transition smoothly to the rear and reducing the height of the light incident on the rear; the fifth lens has a negative optical power, and the marginal rays and central rays of each field of view are clearly distinguishable, which is beneficial to the aberration correction of the central and marginal rays of each field of view and is conducive to achieving high resolution. The fifth lens uses a material with a high refractive index and a low Abbe number, and the fourth lens uses a material with a relatively low refractive index and a high Abbe number. The lenses of the two materials are cemented together, which can effectively correct the chromatic aberration of the optical system; at the same time, it can reduce the assembly components between the fourth lens and the fifth lens, which is beneficial to reducing the process and the overall weight, reducing the cost; at the same time, it reduces the light energy loss caused by reflection between the lenses, improves the image plane illumination, and weakens the ghost image; because the light transitions smoothly when passing through the cemented surface, it is less sensitive to tolerances such as eccentricity and tilt between the two lenses, so the tolerance sensitivity during lens assembly can be reduced; it can reasonably distribute the focal length, and both lenses are made of glass, which helps to achieve thermal compensation and improve the performance of the lens at different temperatures.

[0190] In this embodiment, the first lens, the second lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens are all aspherical lenses. By reasonably setting the aspherical lenses, it is beneficial to have a large angular resolution in the central region and improve the resolution; it is beneficial to improve field curvature and astigmatism and enhance the resolution ability.

[0191] In this embodiment, the optical lens further includes a diaphragm, and the diaphragm is arranged between the third lens and the fourth lens. Such a setting is beneficial to the effective convergence of the light entering the optical system, reduces the lens aperture at the rear end of the optical system, and reduces the assembly sensitivity of the system.

[0192] In this embodiment, at least one of the first lens, the second lens, the fifth lens, the sixth lens, and the seventh lens is provided with a reverse curvature. Selecting reverse curvature for some lenses is beneficial to balancing aberration and improving resolution.

[0193] In this embodiment, the following relationship is satisfied among the maximum field of view angle FOV of the optical lens, the overall focal length value F of the optical lens, and the image height H corresponding to the maximum field of view angle of the optical lens: (FOV × F) / H ≤ 80. When this conditional formula is satisfied, with a certain image height, a smaller focal length and a larger field of view angle will not only affect the imaging effect in the central region of the optical lens, but also affect the distortion of the peripheral field of view; a larger focal length affects the imaging effect of the peripheral field of view and the performance of the entire optical system. Therefore, the ratio of the focal length to the image height of the optical lens can be limited within a reasonable range, thereby improving the resolution of the optical lens and meeting the requirements of short focal length, large target surface, and large image height at the same time. With such a setting, when the image height is certain, the smaller the focal length and the larger the field of view angle, the better the resolution can be improved through the reasonable constraint of this conditional formula, while meeting the advantages of short focal length, large target surface, and large image height. Preferably, 30 ≤ (FOV × F) / H ≤ 70. More preferably, 40 ≤ (FOV × F) / H ≤ 65. More preferably, 44 ≤ (FOV × F) / H ≤ 58.

[0194] In this embodiment, the following relationship is satisfied among the overall optical length of the optical lens, that is, the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging surface of the optical lens, the radian value θ of the maximum field of view angle of the optical lens, and the image height H corresponding to the maximum field of view angle of the optical lens: TTL / H / θ ≤ 2. When this conditional formula is satisfied, with a certain image height and field of view, the TTL of the optical system is shorter, and miniaturization of the optical lens can be achieved. Preferably, TTL / H / θ ≤ 1.8. More preferably, TTL / H / θ ≤ 1.6. More preferably, TTL / H / θ ≤ 1.45. With a certain image height and field of view, the smaller the TTL / H / θ, the smaller the TTL, and the better the miniaturization effect.

[0195] In this embodiment, the following relationship is satisfied among the maximum clear aperture D of the first side of the first lens corresponding to the maximum field of view angle of the optical lens, the image height H corresponding to the maximum field of view angle of the optical lens, and the radian value θ of the maximum field of view angle of the optical lens: D / H / θ ≤ 0.9. When this conditional formula is satisfied, with the image height H corresponding to the maximum field of view angle of the optical lens and the radian value θ corresponding to the image height of the maximum field of view angle remaining unchanged, ensuring a small front aperture can achieve miniaturization. Preferably, D / H / θ ≤ 0.8. More preferably, D / H / θ ≤ 0.7. More preferably, D / H / θ ≤ 0.6. The smaller the D / H / θ, the smaller the front aperture, and the better the miniaturization effect.

[0196] In this embodiment, the relationship between the overall focal length value F of the optical lens and the image height H corresponding to the maximum field of view angle of the optical lens satisfies: F / H ≤ 0.8. When the image height is constant, the smaller the focal length, the greater the distortion. This will not only affect the imaging effect in the central area of the optical lens, but also affect the distortion of the peripheral field of view. The distortion of the edge field of view will increase as the focal length value F decreases, which is not conducive to achieving the effect of small distortion, affecting the imaging effect of the peripheral field of view and the performance of the entire optical system. Therefore, the ratio of the focal length to the image height of the optical lens can be limited within a reasonable range, thereby improving the resolution of the optical lens. Preferably, 0.25 ≤ F / H ≤ 0.7. More preferably, 0.3 ≤ F / H ≤ 0.6. More preferably, 0.4 ≤ F / H ≤ 0.55. Controlling F / H within a more preferred range enables better resolution of the optical lens.

[0197] In this embodiment, the relationship between the diaphragm aperture DST and the overall focal length value F of the optical lens satisfies: DST / F ≤ 1.5. The larger the ratio of the diaphragm aperture to the effective focal length, the larger the aperture of the optical lens. Under the same incident light, a large light input can be achieved, ensuring that the actual used image is brighter. Preferably, 0.6 ≤ DST / F ≤ 1.2. More preferably, 0.7 ≤ DST / F ≤ 1.0. More preferably, 0.75 ≤ DST / F ≤ 0.95. Controlling DST / F within a more preferred range makes the aperture of the optical lens larger, the light input more sufficient, and the imaging image brighter.

[0198] In this embodiment, the relationship between the image height H corresponding to the maximum field of view angle of the optical lens, the overall focal length value F of the optical lens, and the radian value θ of the maximum field of view angle of the optical lens satisfies: 0.5 ≤ (H / 2) / (F * tan(θ / 2)) ≤ 0.9. Meeting this conditional formula ensures that, with the field of view angle and the size of the imaging surface unchanged, the optical focal length of the system is reduced, high angular resolution is achieved, and the imaging effect and clarity of the central area of the optical lens are emphasized. Preferably, 0.6 ≤ (H / 2) / (F * tan(θ / 2)) ≤ 0.9. More preferably, 0.65 ≤ (H / 2) / (F * tan(θ / 2)) ≤ 0.86. Controlling this conditional formula within a more preferred range is more conducive to achieving high angular resolution and emphasizing the imaging effect and clarity of the central area of the optical lens.

[0199] In this embodiment, the central thickness d8 of the fourth lens, the central thickness d9 of the fifth lens, and the total optical length of the optical lens, that is, the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging surface of the optical lens, satisfy: (d8 + d9) / TTL ≤ 0.4. By reasonably controlling the relationship between the central thickness of the doublet lens on the optical axis and the total optical length of the optical lens, if the proportion of the central thickness of the doublet lens is too large, the light control ability of the front lens decreases, the light at the large-angle entrance pupil position is limited at the front lens, and the relative illumination is low. When the total optical length of the optical lens remains unchanged, the central thickness of the doublet lens is reasonably set to enhance the light control ability of the optical lens, which is beneficial to regulating more light to enter the rear system and improving the relative illumination. Preferably, 0.08 ≤ (d8 + d9) / TTL ≤ 0.3. With this setting, when the total optical length of the optical lens remains unchanged, the central thickness of the doublet lens is reasonably set, which can further enhance the light control ability of the optical lens, is beneficial to regulating more light to enter the rear system, and further improves the relative illumination. More preferably, 0.12 ≤ (d8 + d9) / TTL ≤ 0.2.

[0200] In this embodiment, the central curvature radius R3 of the first side of the second lens and the central curvature radius R4 of the second side of the second lens satisfy: 0 < R3 / R4 ≤ 2.5. The special shape setting of the second lens ensures that the R values of both sides are within a certain range, which is beneficial to the smooth transition of the optical path of light through the lens and reduces the system sensitivity. Preferably, 0.25 ≤ R3 / R4 ≤ 2. With this setting, it is more beneficial to further improve the resolution ability. More preferably, 0.5 ≤ R3 / R4 ≤ 1.5. More preferably, 0.6 ≤ R3 / R4 ≤ 1.2.

[0201] In this embodiment, the focal length F2 of the second lens and the overall focal length value F of the optical lens satisfy: 5 ≤ |F2 / F|. The second lens is preferably a plastic lens. The second lens has a relatively large focal length and a small light deflection ability, which can make light enter the rear optical system smoothly and is beneficial to collecting light in the peripheral field of view; at high temperatures, the photosensitive chip of the optical lens moves backward, and the change rate of the optical power of the second lens is small, which can control the thermal compensation amount of the entire optical lens and is beneficial to the optical lens maintaining good resolution at high and low temperatures, and has good temperature performance. Preferably, 8 ≤ |F2 / F|. With this setting, at high temperatures, the photosensitive chip of the optical lens moves backward, and the change rate of the optical power of the second lens is small, which can better control the thermal compensation amount of the entire optical lens, is more beneficial to the optical lens maintaining good resolution at high and low temperatures, and ensures good temperature performance. More preferably, 8 ≤ |F2 / F| ≤ 200. More preferably, 8 ≤ |F2 / F| ≤ 150.

[0202] In this embodiment, the central radius of curvature R1 of the first side of the first lens and the overall focal length value F of the optical lens satisfy: R1 / F ≤ 5. Such a setting is beneficial to ensuring that the first side of the first lens is a convex surface and has a relatively small radius of curvature, which is conducive to collecting incident light and reducing the height of the incident light, so that the height of the light entering the first lens is reduced, and the front aperture is decreased; the first side is a convex surface, which compresses the height of the light exiting from the second side of the first lens, and the position where the light enters the second lens is relatively low, which is beneficial to reducing the magnification of large-angle light by the lens, thereby reducing chromatic aberration, reducing the aberration caused by the light entering through the second lens, improving the resolution, and making the lens structure compact, which is beneficial to miniaturization. Preferably, R1 / F ≤ 3. With such a setting, the first side of the first lens is a convex surface and has a relatively small radius of curvature, which can better ensure strong light processing ability, ensure that the light on the first side quickly deflects towards the optical axis after entering the first lens, is beneficial to reducing the front aperture, and can better take into account the short focal length of the entire system and improve the resolution of the small field of view. More preferably, 0.3 ≤ R1 / F ≤ 2.2. More preferably, 0.5 ≤ R1 / F ≤ 1.8.

[0203] In this embodiment, the central thickness d11 of the sixth lens and the overall optical length of the optical lens, that is, the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging surface of the optical lens satisfy: d11 / TTL ≤ 0.35. Constraining the central thickness of the sixth lens to be relatively thick and having a large proportion in the total length of the entire system is beneficial to the smooth transition of light to the imaging surface and improving the resolution. Preferably, d11 / TTL ≤ 0.2. Such a setting is more conducive to ensuring the proportion of the sixth lens in the total length of the entire system and greatly improving the resolution ability. More preferably, d11 / TTL ≤ 0.15. More preferably, 0.08 ≤ d11 / TTL ≤ 0.15.

[0204] In this embodiment, the overall focal length value F of the optical lens and the optical back focal length of the optical lens, that is, the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging surface satisfy: F / BFL ≤ 3. Reasonably controlling the relationship between the focal length and the back focal length helps to have a longer back focal length and achieve a short focal length for the entire system. A longer back focal length can ensure that the light rays exiting from the second side of the sixth lens and hitting the imaging surface have a relatively gentle trend, which is beneficial to the smooth transition of peripheral light, thereby reducing the sensitivity of the optical system and highlighting the imaging effect in the central region. Preferably, F / BFL ≤ 2.5. More preferably, 0.5 ≤ F / BFL ≤ 1.8. More preferably, 0.75 ≤ F / BFL ≤ 1.5. Controlling F / BFL within this more preferred range can better ensure that the back focal length of the optical lens is long enough, the effect of reducing sensitivity is more prominent, and the imaging effect in the central region can be better ensured.

[0205] In this embodiment, the focal length F6 of the sixth lens and the focal length F7 of the seventh lens satisfy: -20 ≤ F6 / F7 ≤ -0.15. Constraining the ratio of the focal lengths of the two lenses of the sixth lens and the seventh lens within a certain range results in a relatively small change in the optical path passing through the two lenses at high and low temperatures, making the thermal contribution of the lenses at high and low temperatures close, which is conducive to maintaining the performance stability of the entire optical system within a large temperature change range. Preferably, -10 ≤ F6 / F7 ≤ -0.3. Such a setting can better ensure that the thermal contributions of the two lenses at high and low temperatures are close, which is beneficial to ensuring the temperature performance stability. More preferably, -6 ≤ F6 / F7 ≤ -0.35. More preferably, -3 ≤ F6 / F7 ≤ -0.4.

[0206] In this embodiment, the center curvature radius R1 of the first side of the first lens and the center curvature radius R2 of the second side of the first lens satisfy: R1 / R2 ≤ 6. Constraining the ratio of the R values of the two surfaces of the first lens within a certain range forms a special lens shape, such that there is an optical path difference between the peripheral light and the central light, reducing the coupling of light rays in each field of view to the chip, making the imaging of each field of view clear. And it is beneficial for light to enter the subsequent optical system, and reduces the front aperture of the optical lens, reducing the volume, which is beneficial for miniaturization and cost reduction. Preferably, 0.5 ≤ R1 / R2 ≤ 5. Such a setting is more conducive to light entering the subsequent optical system, and reduces the front aperture of the optical lens, reducing the volume, which is beneficial for miniaturization and cost reduction. More preferably, 1 ≤ R1 / R2 ≤ 4. More preferably, 1.5 ≤ R1 / R2 ≤ 3.

[0207] In this embodiment, the center curvature radius R6 of the second side of the third lens and the center curvature radius R5 of the first side of the third lens satisfy: 0.5 ≤ |R6 / R5|. Controlling the R values of the two surfaces of the third lens makes the third lens biconvex and the lens shape gentle. Among them, the curvature radius of the second side of the third lens is larger, which is beneficial for the influence of a large temperature change on the focal length of the third lens to be smaller, and is conducive to maintaining the performance stability of the entire optical system within a large temperature change range. Preferably, 1 ≤ |R6 / R5| ≤ 200. Such a setting can better ensure the temperature performance stability of the third lens. More preferably, 1.2 ≤ |R6 / R5| ≤ 160.

[0208] In this embodiment, the center curvature radius R7 of the first side surface of the fourth lens and the center curvature radius R8 of the second side surface of the fourth lens satisfy: 0.7 ≤ |R7 / R8| ≤ 3. Controlling the center curvature radii of the two side surfaces of the fourth lens so that the curvature radii on both sides of the fourth lens are close is conducive to the gentle transition of light, reducing aberration, and improving imaging quality. Preferably, 0.85 ≤ |R7 / R8| ≤ 2.5. Such a setting can better ensure that the fourth lens can ensure the gentle transition of light while optimizing aberration. More preferably, 1.0 ≤ |R7 / R8| ≤ 2. More preferably, 1.2 ≤ |R7 / R8| ≤ 1.8.

[0209] In this embodiment, the center curvature radius R4 of the second side surface of the second lens and the center curvature radius R5 of the first side surface of the third lens satisfy: R4 / R5 < 0. Controlling the center curvature radii of the second side surface of the second lens and the first side surface of the third lens so that the surface types of the second side surface of the second lens and the first side surface of the third lens are opposite enables the light rays emerging from the second lens to be gently incident on the first side surface of the third lens, facilitating the gentle transition of light; controlling R4 / R5 within a certain range is also conducive to reducing light energy loss, improving the illuminance and imaging quality of the peripheral field of view, and further improving resolution. Preferably, -5 ≤ R4 / R5 ≤ -0.2. Such a setting can better reduce light energy loss, better increase the illuminance and imaging quality of the peripheral field of view, and further improve resolution. More preferably, -3 ≤ R4 / R5 ≤ -0.3. More preferably, -2.4 ≤ R4 / R5 ≤ -0.35.

[0210] In this embodiment, the center curvature radius R10 of the second side surface of the fifth lens and the center curvature radius R9 of the first side surface of the fifth lens satisfy: 1.5 ≤ |R10 / R9|. Controlling the ratio of the curvature radii of the two sides of the fifth lens within this range is conducive to the smooth trend of light rays, can improve the astigmatism and field curvature of imaging, and improve the resolution ability of the optical system. Preferably, 2 ≤ |R10 / R9|. More preferably, 2.5 ≤ |R10 / R9| ≤ 40. More preferably, 3 ≤ |R10 / R9| ≤ 25. This conditional formula is more preferably controlled, which can further improve astigmatism and field curvature, and the high resolution is more prominent.

[0211] In this embodiment, the center curvature radius R10 of the second side surface of the fifth lens and the overall focal length value F of the optical lens satisfy: 1.5 ≤ |R10 / F|. The image side R value of the fifth lens is relatively large, ensuring that the shape of the fifth lens is relatively flat, which can reduce the height of the outgoing light rays on the lens, reduce the lens aperture, and make the outgoing light rays transition to the rear more gently, thereby weakening the system sensitivity. Preferably, 2 ≤ |R10 / F|. Such a setting can better reduce the aperture of the fifth lens and further weaken the system sensitivity. More preferably, 2.5 ≤ |R10 / F| ≤ 45. More preferably, 3 ≤ |R10 / F| ≤ 30.

[0212] In this embodiment, the overall focal length value F of the optical lens and the overall optical length of the optical lens, that is, the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging surface of the optical lens satisfy: F / TTL ≤ 0.35. When TTL is fixed, controlling the ratio of F to TTL to be small is beneficial to achieving the short focal length effect of the entire system and highlighting the imaging effect of the small field of view angle in the central region. Preferably, F / TTL ≤ 0.3. More preferably, F / TTL ≤ 0.24. Controlling this conditional expression to be more preferable is more conducive to meeting the characteristics of short focal length and highlighting the imaging effect of the small field of view angle in the central region.

[0213] Optionally, the above optical lens may further include a color filter for correcting color deviation and a protective glass for protecting the photosensitive element located on the imaging surface.

[0214] The optical lens in this application can adopt multiple lenses, such as the above seven lenses. This application does not specifically limit the specific number of spherical lenses and aspherical lenses. When focusing on imaging quality, the number of aspherical lenses can be increased. The characteristic of an aspherical lens is that the curvature changes continuously from the center of the lens to the periphery of the lens. Different from a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has better curvature radius characteristics and has the advantages of improving distortion aberration and improving astigmatism aberration. After adopting an aspherical lens, it is possible to eliminate the aberration that appears during imaging as much as possible, thereby improving the imaging quality.

[0215] In an exemplary embodiment, this solution does not limit the plastic and glass of the lens. When focusing on temperature performance, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens can all be glass lenses. The optical lens made of glass can suppress the shift of the back focal length of the optical lens with temperature changes to improve the system stability. At the same time, using glass material can avoid the imaging blur of the lens caused by high and low temperature changes in the use environment, which affects the normal use of the optical lens. For example, an optical lens with a full glass design has a wide temperature range and can maintain stable optical performance in the range of -40°C to 105°C. Specifically, when focusing on resolution quality and reliability, the first lens to the seventh lens can all be glass aspherical lenses. Of course, in application scenarios with lower requirements for temperature stability, the first lens to the seventh lens in the optical lens can also be all made of plastic. Making the optical lens with plastic can effectively reduce the manufacturing cost. Of course, the first lens to the seventh lens in the optical lens can also be made of a combination of plastic and glass.

[0216] The present application also provides an electronic device, including the above optical lens and an imaging element that converts the optical image formed by the optical lens into an electrical signal. The imaging element may be a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor device (CMOS). The electronic device may be an independent imaging device such as a digital camera, or an imaging module integrated on a mobile electronic device such as a mobile phone. The electronic device is equipped with the optical lens described above.

[0217] However, those skilled in the art should understand that, without departing from the technical solutions claimed in the present application, the number of lenses constituting the optical lens may 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 embodiments, the optical lens is not limited to including seven lenses. If necessary, the optical lens may also include other numbers of lenses.

[0218] The following further describes, with reference to the drawings, examples of the specific surface types and parameters of the optical lens applicable to the above embodiments.

[0219] It should be noted that any one of Examples 1 to 12 below is applicable to all embodiments of the present application.

[0220] Example 1

[0221] As Figure 1 shown, it is a schematic diagram of the optical lens structure of Example 1.

[0222] As Figure 1 shown, the optical lens sequentially includes, from the first side to the second side: a first lens L1, a second lens L2, a third lens L3, a stop STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a first side surface S15 of the protective glass, a second side surface S16 of the protective glass, and an imaging surface IMA.

[0223] The first lens L1 has a negative optical power. The first surface S1 of the first lens is convex, and the second surface S2 of the first lens is concave. The second lens L2 has a positive optical power. The first surface S3 of the second lens is concave, and the second surface S4 of the second lens is convex. The third lens L3 has a positive optical power. The first surface S5 of the third lens is convex, and the second surface S6 of the third lens is convex. The fourth lens L4 has a positive optical power. The first surface S8 of the fourth lens is convex, and the second surface S9 of the fourth lens is convex. The fifth lens L5 has a negative optical power. The first surface S9 of the fifth lens is concave, and the second surface S10 of the fifth lens is concave. The sixth lens L6 has a positive optical power. The first surface S11 of the sixth lens is convex, and the second surface S12 of the sixth lens is convex. The seventh lens L7 has a negative optical power. The first surface S13 of the seventh lens is convex, and the second surface S14 of the seventh lens is concave. The light from the first side sequentially passes through the surfaces S1 to S16 and finally forms an image on the imaging surface IMA. Since the fourth lens L4 and the fifth lens L5 are cemented to form a cemented lens, the second surface S9 of the fourth lens and the first surface S9 of the fifth lens are the same surface.

[0224] In this example, the total effective focal length F of the optical lens is 2.508 mm, the maximum field of view angle FOV of the optical lens is 112.000°, and the total length TTL of the optical lens is 13.915 mm.

[0225] Table 1 shows the basic structural parameter table of the optical lens in Example 1, where the unit of the radius of curvature Radius and the thickness Thickness / distance is millimeter (mm).

[0226] Surf Radius Thickness Nd Vd 1 2.802 0.600 1.54 56.11 2 1.268 2.854 3 -3.310 1.026 1.54 56.11 4 -3.600 0.100 5 7.752 2.065 1.77 49.61 6 -10.068 0.457 STO Infinity -0.066 8 4.987 2.075 1.54 56.11 9 -3.140 0.550 1.64 23.53 10 21.408 0.100 11 13.255 1.630 1.54 56.11 12 -2.802 0.088 13 5.501 0.464 1.64 23.53 14 2.601 0.654 15 Infinity 0.900 1.52 64.21 16 Infinity 0.420 IMA / /

[0227] Table 1

[0228] In Example 1, the surface profiles of the aspherical lenses can be defined by, but not limited to, the following aspherical formula:

[0229]

[0230] where x is the sagitta, the distance from the vertex of the aspherical surface when the aspherical surface is along the optical axis at a position with a height of h; c is the paraxial curvature of the aspherical surface, c = 1 / R (that is, the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; A, B, C, D, E, F, G are all high-order term coefficients. Table 2 below shows the conic coefficient k and the high-order term coefficients A, B, C, D, E, F, G that can be used for the aspherical lens surfaces S1 - S14 in Example 1.

[0231]

[0232]

[0233] Table 2

[0234] Example 2

[0235] As Figure 2 shown, it is a schematic diagram of the optical lens structure of Example 2. In this example and the following examples, for the sake of simplicity, some descriptions similar to those in Example 1 will be omitted.

[0236] As Figure 2 shown, the optical lens sequentially includes from the first side to the second side: the first lens L1, the second lens L2, the third lens L3, the aperture STO, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, the first side S15 of the protective glass, the second side S16 of the protective glass, and the imaging surface IMA.

[0237] The first lens L1 has a negative optical power. The first side S1 of the first lens is convex, and the second side S2 of the first lens is concave. The second lens L2 has a positive optical power. The first side S3 of the second lens is concave, and the second side S4 of the second lens is convex. The third lens L3 has a positive optical power. The first side S5 of the third lens is convex, and the second side S6 of the third lens is convex. The fourth lens L4 has a positive optical power. The first side S8 of the fourth lens is convex, and the second side S9 of the fourth lens is convex. The fifth lens L5 has a negative optical power. The first side S9 of the fifth lens is concave, and the second side S10 of the fifth lens is concave. The sixth lens L6 has a positive optical power. The first side S11 of the sixth lens is convex, and the second side S12 of the sixth lens is convex. The seventh lens L7 has a negative optical power. The first side S13 of the seventh lens is convex, and the second side S14 of the seventh lens is concave. The light from the first side sequentially passes through the surfaces S1 to S16 and finally forms an image on the imaging surface IMA. Since the fourth lens L4 and the fifth lens L5 are cemented to form a cemented lens, the second side S9 of the fourth lens and the first side S9 of the fifth lens are the same surface.

[0238] In this example, the first side S1 of the first lens, the first side S3 of the second lens, the first side S9 of the fifth lens, the first side S13 of the seventh lens, and the second side S14 of the seventh lens are all set with anastigmatism.

[0239] In this example, the total effective focal length F of the optical lens is 2.508 mm, the maximum field of view FOV of the optical lens is 112.000°, and the total length TTL of the optical lens is 14.094 mm.

[0240] Table 3 shows the basic structural parameter table of the optical lens in Example 2, where the unit of the radius of curvature Radius and the thickness Thickness / distance is millimeter (mm).

[0241]

[0242]

[0243] Table 3

[0244] The following Table 4 shows the conic coefficient k and the coefficients A - G of each high - order term that can be used for the aspherical lens surface in Example 2.

[0245]

[0246] Table 4

[0247] Example 3

[0248] As Figure 3 shown, it is a schematic diagram of the optical lens structure in Example 3.

[0249] As Figure 3 shown, the optical lens sequentially includes from the first side to the second side: the first lens L1, the second lens L2, the third lens L3, the stop STO, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, the first side S15 of the protective glass, the second side S16 of the protective glass, and the imaging surface IMA.

[0250] The first lens L1 has a negative focal power. The first side S1 of the first lens is a convex surface, and the second side S2 of the first lens is a concave surface. The second lens L2 has a negative focal power. The first side S3 of the second lens is a concave surface, and the second side S4 of the second lens is a convex surface. The third lens L3 has a positive focal power. The first side S5 of the third lens is a convex surface, and the second side S6 of the third lens is a concave surface. The fourth lens L4 has a positive focal power. The first side S8 of the fourth lens is a convex surface, and the second side S9 of the fourth lens is a convex surface. The fifth lens L5 has a negative focal power. The first side S9 of the fifth lens is a concave surface, and the second side S10 of the fifth lens is a concave surface. The sixth lens L6 has a positive focal power. The first side S11 of the sixth lens is a convex surface, and the second side S12 of the sixth lens is a convex surface. The seventh lens L7 has a negative focal power. The first side S13 of the seventh lens is a convex surface, and the second side S14 of the seventh lens is a concave surface. The light from the first side sequentially passes through the surfaces S1 to S16 and finally forms an image on the imaging surface IMA. Since the fourth lens L4 and the fifth lens L5 are cemented to form a cemented lens, the second side S9 of the fourth lens and the first side S9 of the fifth lens are the same surface.

[0251] In this example, the first side S1 of the first lens, the second side S10 of the fifth lens, the second side S12 of the sixth lens, and the first side S13 of the seventh lens are all provided with an anti-curve.

[0252] In this example, the total effective focal length F of the optical lens is 2.581 mm, the maximum field of view angle FOV of the optical lens is 112.000°, and the total length TTL of the optical lens is 14.625 mm.

[0253] Table 5 shows the basic structural parameter table of the optical lens in Example 3, where the unit of the radius of curvature Radius and the thickness Thickness / distance is millimeter (mm).

[0254] Surf Radius Thickness Nd Vd 1 2.758 0.600 1.54 56.11 2 1.261 2.770 3 -3.094 1.314 1.54 56.11 4 -4.426 0.078 5 4.440 2.225 1.77 49.61 6 456.556 0.137 STO Infinity 0.622 8 4.689 1.682 1.54 56.11 9 -3.400 0.550 1.64 23.53 10 45.938 0.100 11 12.278 1.600 1.54 56.11 12 -3.205 0.159 13 9.872 0.600 1.64 23.53 14 3.867 0.654 15 Infinity 0.900 1.52 64.21 16 Infinity 0.635 IMA / /

[0255] Table 5

[0256] The following Table 6 shows the conic coefficient k and the coefficients A - G of each high-order term that can be used for the aspherical lens surface in Example 3.

[0257]

[0258]

[0259] Table 6

[0260] Example 4

[0261] As Figure 4 shown, it is a schematic diagram of the structure of the optical lens in Example 4.

[0262] As Figure 4 shown, the optical lens sequentially includes, from the first side to the second side: the first lens L1, the second lens L2, the third lens L3, the aperture STO, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, the first side S15 of the protective glass, the second side S16 of the protective glass, and the imaging surface IMA.

[0263] The first lens L1 has a negative focal power. The first side S1 of the first lens is convex, and the second side S2 of the first lens is concave. The second lens L2 has a negative focal power. The first side S3 of the second lens is concave, and the second side S4 of the second lens is convex. The third lens L3 has a positive focal power. The first side S5 of the third lens is convex, and the second side S6 of the third lens is concave. The fourth lens L4 has a positive focal power. The first side S8 of the fourth lens is convex, and the second side S9 of the fourth lens is convex. The fifth lens L5 has a negative focal power. The first side S9 of the fifth lens is concave, and the second side S10 of the fifth lens is concave. The sixth lens L6 has a positive focal power. The first side S11 of the sixth lens is convex, and the second side S12 of the sixth lens is convex. The seventh lens L7 has a negative focal power. The first side S13 of the seventh lens is convex, and the second side S14 of the seventh lens is concave. The light from the first side sequentially passes through the surfaces S1 to S16 and finally forms an image on the imaging surface IMA. Since the fourth lens L4 and the fifth lens L5 are cemented to form a cemented lens, the second side S9 of the fourth lens and the first side S9 of the fifth lens are the same surface.

[0264] In this example, the first side S3 of the second lens, the second side S10 of the fifth lens, the second side S12 of the sixth lens, the first side S13 of the seventh lens, and the second side S14 of the seventh lens are all aspherical.

[0265] In this example, the total effective focal length F of the optical lens is 2.768 mm, the maximum field of view angle FOV of the optical lens is 112.000°, and the total length TTL of the optical lens is 13.714 mm.

[0266] Table 7 shows the basic structural parameter table of the optical lens in Example 4, where the unit of the radius of curvature Radius and the thickness Thickness / distance is millimeter (mm).

[0267]

[0268]

[0269] Table 7

[0270] The following Table 8 shows the conic coefficient k and the coefficients A - G of each high - order term for the aspherical lens surfaces in Example 4.

[0271]

[0272] Table 8

[0273] Example 5

[0274] As Figure 5As shown, it is a schematic diagram of the optical lens structure of Example 5.

[0275] As Figure 5 shown, the optical lens sequentially includes, from the first side to the second side: a first lens L1, a second lens L2, a third lens L3, a stop STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a first side S15 of the protective glass, a second side S16 of the protective glass, and an imaging surface IMA.

[0276] The first lens L1 has a negative optical power. The first side S1 of the first lens is a convex surface, and the second side S2 of the first lens is a concave surface. The second lens L2 has a negative optical power. The first side S3 of the second lens is a concave surface, and the second side S4 of the second lens is a convex surface. The third lens L3 has a positive optical power. The first side S5 of the third lens is a convex surface, and the second side S6 of the third lens is a concave surface. The fourth lens L4 has a positive optical power. The first side S8 of the fourth lens is a convex surface, and the second side S9 of the fourth lens is a convex surface. The fifth lens L5 has a negative optical power. The first side S9 of the fifth lens is a concave surface, and the second side S10 of the fifth lens is a convex surface. The sixth lens L6 has a positive optical power. The first side S11 of the sixth lens is a concave surface, and the second side S12 of the sixth lens is a convex surface. The seventh lens L7 has a negative optical power. The first side S13 of the seventh lens is a convex surface, and the second side S14 of the seventh lens is a concave surface. Light from the first side sequentially passes through the surfaces S1 to S16 and finally forms an image on the imaging surface IMA. Since the fourth lens L4 and the fifth lens L5 are cemented to form a cemented lens, the second side S9 of the fourth lens and the first side S9 of the fifth lens are the same surface.

[0277] In this example, the first side S1 of the first lens, the first side S3 of the second lens, the first side S9 of the fifth lens, the first side S11 of the sixth lens, the second side S12 of the sixth lens, the first side S13 of the seventh lens, and the second side S14 of the seventh lens are all set with an aspheric curve. In this example, the total effective focal length F of the optical lens is 2.716 mm, the maximum field of view FOV of the optical lens is 112.000°, and the total length TTL of the optical lens is 14.652 mm.

[0278] Table 9 shows the basic structure parameter table of the optical lens of Example 5, where the unit of the radius of curvature Radius and the thickness Thickness / distance is millimeter (mm).

[0279] Surf Radius Thickness Nd Vd 1 2.615 0.600 1.54 56.11 2 1.263 2.982 3 -3.168 1.310 1.54 56.11 4 -4.508 0.092 5 4.202 2.672 1.77 49.61 6 255.073 0.137 STO Infinity 0.178 8 4.443 1.560 1.54 56.11 9 -2.630 0.550 1.64 23.53 10 -10.219 0.250 11 -9.238 1.613 1.54 56.11 12 -3.092 0.100 13 7.757 0.500 1.64 23.53 14 3.366 0.654 15 Infinity 0.900 1.52 64.21 16 Infinity 0.552 IMA / /

[0280] Table 9

[0281] Table 10 below shows the conic coefficient k and the coefficients A - G of each higher - order term that can be used for the aspherical lens surface in Example 5.

[0282]

[0283]

[0284] Table 10

[0285] Example 6

[0286] As Figure 6 shown, it is a schematic diagram of the optical lens structure of Example 6.

[0287] As Figure 6 shown, the optical lens sequentially includes from the first side to the second side: the first lens L1, the second lens L2, the third lens L3, the aperture STO, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, the first side S15 of the protective glass, the second side S16 of the protective glass, and the imaging surface IMA.

[0288] The first lens L1 has a negative optical power. The first side S1 of the first lens is convex, and the second side S2 of the first lens is concave. The second lens L2 has a negative optical power. The first side S3 of the second lens is concave, and the second side S4 of the second lens is convex. The third lens L3 has a positive optical power. The first side S5 of the third lens is convex, and the second side S6 of the third lens is concave. The fourth lens L4 has a positive optical power. The first side S8 of the fourth lens is convex, and the second side S9 of the fourth lens is convex. The fifth lens L5 has a negative optical power. The first side S9 of the fifth lens is concave, and the second side S10 of the fifth lens is convex. The sixth lens L6 has a positive optical power. The first side S11 of the sixth lens is concave, and the second side S12 of the sixth lens is convex. The seventh lens L7 has a negative optical power. The first side S13 of the seventh lens is convex, and the second side S14 of the seventh lens is concave. The light from the first side sequentially passes through the surfaces S1 to S16 and finally forms an image on the imaging surface IMA. Since the fourth lens L4 and the fifth lens L5 are cemented to form a cemented lens, the second side S9 of the fourth lens and the first side S9 of the fifth lens are the same surface.

[0289] In this example, the first side S1 of the first lens, the first side S3 of the second lens, and the second side S12 of the sixth lens are all set with anastigmatism.

[0290] In this example, the total effective focal length F of the optical lens is 2.711 mm, the maximum field - of - view angle FOV of the optical lens is 112.000°, and the total length TTL of the optical lens is 14.437 mm.

[0291] Table 11 shows the basic structural parameter table of the optical lens in Example 6, where the unit of the radius of curvature Radius and the thickness Thickness / distance is millimeter (mm).

[0292]

[0293]

[0294] Table 11

[0295] The following Table 12 shows the conic coefficient k and the coefficients A - G of each high - order term that can be used for the aspherical lens surface in Example 6.

[0296]

[0297] Table 12

[0298] Example 7

[0299] As Figure 7 shown, it is a schematic diagram of the optical lens structure in Example 7.

[0300] As Figure 7 shown, the optical lens sequentially includes from the first side to the second side: the first lens L1, the second lens L2, the third lens L3, the aperture STO, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, the first side S15 of the protective glass, the second side S16 of the protective glass, and the imaging surface IMA.

[0301] The first lens L1 has a negative optical power. The first side S1 of the first lens is a convex surface, and the second side S2 of the first lens is a concave surface. The second lens L2 has a negative optical power. The first side S3 of the second lens is a concave surface, and the second side S4 of the second lens is a convex surface. The third lens L3 has a positive optical power. The first side S5 of the third lens is a convex surface, and the second side S6 of the third lens is a convex surface. The fourth lens L4 has a positive optical power. The first side S8 of the fourth lens is a convex surface, and the second side S9 of the fourth lens is a convex surface. The fifth lens L5 has a negative optical power. The first side S9 of the fifth lens is a concave surface, and the second side S10 of the fifth lens is a concave surface. The sixth lens L6 has a positive optical power. The first side S11 of the sixth lens is a convex surface, and the second side S12 of the sixth lens is a convex surface. The seventh lens L7 has a negative optical power. The first side S13 of the seventh lens is a concave surface, and the second side S14 of the seventh lens is a concave surface. The light from the first side sequentially passes through the surfaces S1 to S16 and finally forms an image on the imaging surface IMA. Since the fourth lens L4 and the fifth lens L5 are cemented to form a cemented lens, the second side S9 of the fourth lens and the first side S9 of the fifth lens are the same surface.

[0302] In this example, the first side S1 of the first lens, the second side S10 of the fifth lens, the second side S12 of the sixth lens, the first side S13 of the seventh lens, and the second side S14 of the seventh lens are all provided with anastigmatism.

[0303] In this example, the total effective focal length F of the optical lens is 2.688 mm, the maximum field of view angle FOV of the optical lens is 112.000°, and the total length TTL of the optical lens is 14.103 mm.

[0304] Table 13 shows the basic structural parameter table of the optical lens in Example 7, where the unit of the radius of curvature Radius and the thickness Thickness / distance is millimeter (mm).

[0305] Surf Radius Thickness Nd Vd 1 2.703 0.801 1.54 56.11 2 1.259 2.742 3 -3.103 1.372 1.54 56.11 4 -3.953 0.100 5 4.836 2.253 1.77 49.61 6 -28.544 0.137 STO Infinity 0.058 8 4.918 1.688 1.54 56.11 9 -3.159 0.496 1.64 23.53 10 38.827 0.100 11 13.196 1.676 1.54 56.11 12 -3.297 0.154 13 -43.236 0.600 1.64 23.53 14 5.867 0.654 15 Infinity 0.900 1.52 64.21 16 Infinity 0.374 IMA / /

[0306] Table 13

[0307] The following Table 14 shows the conic coefficient k and the coefficients A - G of each high-order term that can be used for the aspherical lens surface in Example 7.

[0308]

[0309] Table 14

[0310] Example 8

[0311] As Figure 8 shown, it is a schematic diagram of the optical lens structure in Example 8.

[0312] As Figure 8 shown, the optical lens sequentially includes from the first side to the second side: the first lens L1, the second lens L2, the third lens L3, the aperture STO, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, the first side S15 of the protective glass, the second side S16 of the protective glass, and the imaging surface IMA.

[0313] The first lens L1 has a negative optical power. The first surface S1 of the first lens is convex, and the second surface S2 of the first lens is concave. The second lens L2 has a negative optical power. The first surface S3 of the second lens is concave, and the second surface S4 of the second lens is convex. The third lens L3 has a positive optical power. The first surface S5 of the third lens is convex, and the second surface S6 of the third lens is convex. The fourth lens L4 has a positive optical power. The first surface S8 of the fourth lens is convex, and the second surface S9 of the fourth lens is convex. The fifth lens L5 has a negative optical power. The first surface S9 of the fifth lens is concave, and the second surface S10 of the fifth lens is concave. The sixth lens L6 has a positive optical power. The first surface S11 of the sixth lens is convex, and the second surface S12 of the sixth lens is convex. The seventh lens L7 has a negative optical power. The first surface S13 of the seventh lens is concave, and the second surface S14 of the seventh lens is concave. The light from the first side sequentially passes through the surfaces S1 to S16 and finally forms an image on the imaging surface IMA. Since the fourth lens L4 and the fifth lens L5 are cemented to form a cemented lens, the second surface S9 of the fourth lens and the first surface S9 of the fifth lens are the same surface.

[0314] In this example, the first surface S1 of the first lens and the second surface S14 of the seventh lens are both set to be aspherical.

[0315] In this example, the total effective focal length F of the optical lens is 2.678 mm, the maximum field of view angle FOV of the optical lens is 112.000°, and the total length TTL of the optical lens is 14.206 mm.

[0316] Table 15 shows the basic structural parameter table of the optical lens of Example 8, where the unit of the radius of curvature Radius and the thickness Thickness / distance is millimeter (mm).

[0317] Surf Radius Thickness Nd Vd 1 2.699 0.800 1.54 56.11 2 1.257 2.699 3 -3.135 1.422 1.54 56.11 4 -3.994 0.100 5 5.045 2.293 1.77 49.61 6 -20.920 0.137 STO Infinity 0.196 8 4.826 1.629 1.54 56.11 9 -3.126 0.559 1.64 23.53 10 42.817 0.100 11 11.660 1.604 1.54 56.11 12 -4.061 0.156 13 -64.752 0.600 1.64 23.53 14 6.578 0.654 15 Infinity 0.900 1.52 64.21 16 Infinity 0.359 IMA / /

[0318] Table 15

[0319] The following Table 16 shows the conic coefficient k and the coefficients A - G of each high - order term that can be used for the aspherical lens surfaces in Example 8.

[0320]

[0321] Table 16

[0322] Example 9

[0323] As Figure 9 shown, it is a schematic diagram of the optical lens structure of Example 9.

[0324] As Figure 9As shown, the optical lens sequentially includes, from the first side to the second side: a first lens L1, a second lens L2, a third lens L3, a stop STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a first side S15 of a protective glass, a second side S16 of the protective glass, and an imaging surface IMA.

[0325] The first lens L1 has a negative focal power. The first side S1 of the first lens is a convex surface, and the second side S2 of the first lens is a concave surface. The second lens L2 has a negative focal power. The first side S3 of the second lens is a concave surface, and the second side S4 of the second lens is a convex surface. The third lens L3 has a positive focal power. The first side S5 of the third lens is a convex surface, and the second side S6 of the third lens is a convex surface. The fourth lens L4 has a positive focal power. The first side S8 of the fourth lens is a convex surface, and the second side S9 of the fourth lens is a convex surface. The fifth lens L5 has a negative focal power. The first side S9 of the fifth lens is a concave surface, and the second side S10 of the fifth lens is a concave surface. The sixth lens L6 has a positive focal power. The first side S11 of the sixth lens is a convex surface, and the second side S12 of the sixth lens is a convex surface. The seventh lens L7 has a negative focal power. The first side S13 of the seventh lens is a convex surface, and the second side S14 of the seventh lens is a concave surface. Light from the first side sequentially passes through the surfaces S1 to S16 and finally forms an image on the imaging surface IMA. Since the fourth lens L4 and the fifth lens L5 are cemented to form a cemented lens, the second side S9 of the fourth lens and the first side S9 of the fifth lens are the same surface.

[0326] In this example, both the first side S13 and the second side S14 of the seventh lens are provided with anastigmatic surfaces.

[0327] In this example, the total effective focal length F of the optical lens is 2.691 mm, the maximum field of view FOV of the optical lens is 112.000°, and the total length TTL of the optical lens is 14.507 mm.

[0328] Table 17 shows the basic structural parameter table of the optical lens of Example 9, where the unit of the radius of curvature Radius and the thickness Thickness / distance is millimeter (mm).

[0329] Surf Radius Thickness Nd Vd 1 2.650 0.600 1.54 56.11 2 1.255 2.680 3 -3.500 1.080 1.54 56.11 4 -4.920 0.080 5 7.400 1.655 1.77 49.61 6 -11.092 0.140 STO Infinity 0.622 8 4.946 1.800 1.54 56.11 9 -3.200 0.550 1.64 23.53 10 43.516 0.100 11 12.278 1.700 1.54 56.11 12 -3.190 0.160 13 9.300 0.700 1.64 23.53 14 3.715 0.670 15 Infinity 0.900 1.52 64.21 16 Infinity 1.070 IMA / /

[0330] Table 17

[0331] The following Table 18 shows the conic coefficient k and the coefficients A - G of each higher-order term that can be used for the aspherical lens surfaces in Example 9.

[0332]

[0333] Table 18

[0334] Example Ten

[0335] As Figure 10 shown, it is a schematic diagram of the optical lens structure of Example Ten.

[0336] As Figure 10 shown, the optical lens sequentially includes from the first side to the second side: the first lens L1, the second lens L2, the third lens L3, the aperture STO, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, the first side S15 of the protective glass, the second side S16 of the protective glass, and the imaging surface IMA.

[0337] The first lens L1 has a negative focal power. The first side S1 of the first lens is a convex surface, and the second side S2 of the first lens is a concave surface. The second lens L2 has a negative focal power. The first side S3 of the second lens is a concave surface, and the second side S4 of the second lens is a convex surface. The third lens L3 has a positive focal power. The first side S5 of the third lens is a convex surface, and the second side S6 of the third lens is a convex surface. The fourth lens L4 has a positive focal power. The first side S8 of the fourth lens is a convex surface, and the second side S9 of the fourth lens is a convex surface. The fifth lens L5 has a negative focal power. The first side S9 of the fifth lens is a concave surface, and the second side S10 of the fifth lens is a concave surface. The sixth lens L6 has a positive focal power. The first side S11 of the sixth lens is a convex surface, and the second side S12 of the sixth lens is a convex surface. The seventh lens L7 has a negative focal power. The first side S13 of the seventh lens is a convex surface, and the second side S14 of the seventh lens is a concave surface. The light from the first side sequentially passes through the surfaces S1 to S16 and finally forms an image on the imaging surface IMA. Since the fourth lens L4 and the fifth lens L5 are cemented to form a cemented lens, the second side S9 of the fourth lens and the first side S9 of the fifth lens are the same surface.

[0338] In this example, both the first side S13 and the second side S14 of the seventh lens are set to be anastigmatic.

[0339] In this example, the total effective focal length F of the optical lens is 2.630 mm, the maximum field of view FOV of the optical lens is 112.000°, and the total length TTL of the optical lens is 15.100 mm.

[0340] Table 19 shows the basic structure parameter table of the optical lens of Example Ten, where the unit of the radius of curvature Radius and the thickness Thickness / distance is millimeter (mm).

[0341] Surf Radius Thickness Nd Vd 1 2.700 0.620 1.54 56.11 2 1.240 2.700 3 -3.500 1.100 1.54 56.11 4 -4.900 0.100 5 7.400 1.700 1.77 49.61 6 -11.000 0.140 STO Infinity 0.700 8 4.950 1.900 1.54 56.11 9 -3.200 0.600 1.64 23.53 10 50.000 0.200 11 12.300 1.800 1.54 56.11 12 -3.190 0.200 13 9.300 0.700 1.64 23.53 14 3.800 0.670 15 Infinity 0.900 1.52 64.21 16 Infinity 1.070

[0342] Table 19

[0343] Table 20 below shows the conic coefficient k and the coefficients A - G of each high - order term that can be used for the aspherical lens surface in Example Ten.

[0344]

[0345] Table 20

[0346] Example Eleven

[0347] As Figure 11 shown, it is a schematic diagram of the optical lens structure of Example Eleven.

[0348] As Figure 11 shown, the optical lens sequentially includes from the first side to the second side: the first lens L1, the second lens L2, the third lens L3, the aperture STO, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, the first side S15 of the protective glass, the second side S16 of the protective glass, and the imaging surface IMA.

[0349] The first lens L1 has a negative optical power. The first side S1 of the first lens is convex, and the second side S2 of the first lens is concave. The second lens L2 has a negative optical power. The first side S3 of the second lens is concave, and the second side S4 of the second lens is convex. The third lens L3 has a positive optical power. The first side S5 of the third lens is convex, and the second side S6 of the third lens is convex. The fourth lens L4 has a positive optical power. The first side S8 of the fourth lens is convex, and the second side S9 of the fourth lens is convex. The fifth lens L5 has a negative optical power. The first side S9 of the fifth lens is concave, and the second side S10 of the fifth lens is concave. The sixth lens L6 has a positive optical power. The first side S11 of the sixth lens is convex, and the second side S12 of the sixth lens is convex. The seventh lens L7 has a positive optical power. The first side S13 of the seventh lens is convex, and the second side S14 of the seventh lens is convex. The light from the first side sequentially passes through the surfaces S1 to S16 and finally forms an image on the imaging surface IMA. Since the fourth lens L4 and the fifth lens L5 are cemented to form a cemented lens, the second side S9 of the fourth lens and the first side S9 of the fifth lens are the same surface.

[0350] In this example, the first side S13 of the seventh lens is set to be anastigmatic.

[0351] In this example, the total effective focal length F of the optical lens is 2.130 mm, the maximum field - of - view angle FOV of the optical lens is 112.029°, and the total length TTL of the optical lens is 14.910 mm.

[0352] Table 21 shows the basic structure parameter table of the optical lens of Example Eleven, where the unit of the radius of curvature Radius and the thickness Thickness / distance is millimeter (mm).

[0353] Surf Radius Thickness Nd Vd 1 2.758 0.600 1.54 56.00 2 1.256 2.758 3 -3.291 1.093 1.54 56.00 4 -4.873 0.127 5 7.379 1.843 1.77 49.61 6 -11.159 0.137 STO Infinity 0.683 8 4.931 1.827 1.54 56.00 9 -3.263 0.550 1.64 23.53 10 52.936 0.101 11 12.278 1.655 1.54 56.00 12 -3.205 0.178 13 89.000 0.730 1.64 23.53 14 -93.000 0.654 15 Infinity 0.900 1.52 64.21 16 Infinity 1.073 IMA / /

[0354] Table 21

[0355] Table 22 below shows the conic coefficient k and the coefficients A - G of each high - order term that can be used for the aspherical lens surface in Example XI.

[0356]

[0357] Table 22

[0358] Example XII

[0359] As Figure 12 shown, it is a schematic diagram of the optical lens structure of Example XII.

[0360] As Figure 12 shown, the optical lens sequentially includes, from the first side to the second side: the first lens L1, the second lens L2, the third lens L3, the aperture STO, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, the first side S15 of the protective glass, the second side S16 of the protective glass, and the imaging surface IMA.

[0361] The first lens L1 has a negative optical power. The first side S1 of the first lens is a convex surface, and the second side S2 of the first lens is a concave surface. The second lens L2 has a negative optical power. The first side S3 of the second lens is a concave surface, and the second side S4 of the second lens is a convex surface. The third lens L3 has a positive optical power. The first side S5 of the third lens is a convex surface, and the second side S6 of the third lens is a convex surface. The fourth lens L4 has a positive optical power. The first side S8 of the fourth lens is a convex surface, and the second side S9 of the fourth lens is a convex surface. The fifth lens L5 has a negative optical power. The first side S9 of the fifth lens is a concave surface, and the second side S10 of the fifth lens is a concave surface. The sixth lens L6 has a positive optical power. The first side S11 of the sixth lens is a convex surface, and the second side S12 of the sixth lens is a convex surface. The seventh lens L7 has a positive optical power. The first side S13 of the seventh lens is a convex surface, and the second side S14 of the seventh lens is a convex surface. Light from the first side sequentially passes through the surfaces S1 to S16 and finally forms an image on the imaging surface IMA. Since the fourth lens L4 and the fifth lens L5 are cemented to form a cemented lens, the second side S9 of the fourth lens and the first side S9 of the fifth lens are the same surface.

[0362] In this example, the first side S13 of the seventh lens is set to be anastigmatic.

[0363] In this example, the total effective focal length F of the optical lens is 2.122 mm, the maximum field of view FOV of the optical lens is 112.029°, and the total length TTL of the optical lens is 14.876 mm.

[0364] Table 23 shows the basic structural parameter table of the optical lens in Example XII, where the unit of the radius of curvature Radius and the thickness Thickness / distance is millimeter (mm).

[0365] Surf Radius Thickness Nd Vd 1 2.758 0.600 1.54 56.00 2 1.256 2.758 3 -3.291 1.093 1.54 56.00 4 -4.873 0.127 5 7.379 1.843 1.77 49.61 6 -11.159 0.137 STO Infinity 0.683 8 4.931 1.827 1.54 56.00 9 -3.263 0.550 1.64 23.53 10 52.936 0.101 11 12.278 1.655 1.54 56.00 12 -3.205 0.178 13 79.000 0.750 1.64 23.53 14 -80.000 0.600 15 Infinity 0.900 1.52 64.21 16 Infinity 1.073 IMA / /

[0366] Table 23

[0367] The following Table 24 shows the conic coefficient k and the coefficients A - G of each high - order term that can be used for the aspherical lens surface in Example XII.

[0368]

[0369]

[0370] Table 24 In summary, Examples 1 to 12 respectively satisfy the relationships shown in Table 25.

[0371]

[0372]

[0373] Table 25

[0374] Table 26 gives the effective focal length F of the optical lenses in Examples 1 to 12, the effective focal lengths F1 to F7 of each lens, etc. (unit: millimeter).

[0375]

[0376]

[0377] Table 26

[0378] Obviously, the above - described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0379] It should be noted that the terms used herein are for the purpose of describing specific embodiments only and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0380] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order different from those illustrated or described herein.

[0381] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An optical lens, characterized in that, In sequence from the first side to the second side along the optical axis, it includes: A first lens with a negative focal power, wherein the first side surface of the first lens is convex and the second side surface is concave; A second lens with a focal power, wherein the first side surface of the second lens is concave and the second side surface is convex; A third lens with a positive focal power, wherein the first side surface of the third lens is convex; A fourth lens with a positive focal power, wherein the first side surface of the fourth lens is convex and the second side surface is convex; A fifth lens with a negative focal power, wherein the first side surface of the fifth lens is concave; A sixth lens with a positive focal power, wherein the second side surface of the sixth lens is convex; A seventh lens with a focal power.

2. The optical lens according to claim 1, characterized in that, The second lens has a negative focal power; or the second lens has a positive focal power.

3. The optical lens according to claim 1, characterized in that, The second side surface of the third lens is convex; or The second side surface of the third lens is concave.

4. The optical lens according to claim 1, characterized in that, The second side surface of the fifth lens is concave; or The second side surface of the fifth lens is convex.

5. The optical lens according to claim 1, characterized in that, The first side surface of the sixth lens is convex; or The first side surface of the sixth lens is concave.

6. The optical lens according to claim 1, characterized in that, The seventh lens has a negative focal power, the first side surface of the seventh lens is convex and the second side surface is concave; or the seventh lens has a negative focal power, the first side surface of the seventh lens is concave and the second side surface is concave; or the seventh lens has a positive focal power, the first side surface of the seventh lens is convex and the second side surface is convex.

7. The optical lens according to claim 1, characterized in that, The fourth lens and the fifth lens are cemented to form a doublet lens; and / or the first lens, the second lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens are all aspherical lenses.

8. The optical lens according to claim 1, characterized in that, The optical lens further includes a diaphragm, and the diaphragm is disposed between the third lens and the fourth lens; and / or at least one of the first lens, the second lens, the fifth lens, the sixth lens and the seventh lens is provided with an anamorphic surface.

9. An optical lens, characterized in that, In sequence from the first side to the second side along the optical axis, it includes: A first lens with a negative focal power; A second lens with a focal power; A third lens with a positive focal power; A fourth lens with a positive focal power; A fifth lens with a negative focal power; A sixth lens with a positive focal power; A seventh lens with a focal power; Wherein, the included angle arctan(1 / K(S2)) of the second side surface of the first lens and the overall focal length value F of the optical lens satisfy: 15 ≤ arctan(1 / K(S2)) / F.

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

Images