Optical lens and electronic equipment

Abstract

The invention provides an optical lens and electronic equipment. From a first side to a second side, the optical lens comprises a first lens with focal power, wherein a second side surface of the first lens is a concave surface; the second lens has negative focal power, and the second side surface of the second lens is a concave surface; the third lens has positive focal power, and the second side surface of the third lens is a convex surface; the fourth lens has negative focal power, and the first side surface of the fourth lens is a concave surface; the fifth lens has positive focal power, and the second side surface of the fifth lens is a convex surface; the sixth lens has positive focal power, and the second side surface of the sixth lens is a convex surface; the first side surface of the seventh lens is a convex surface, and the second side surface of the seventh lens is a convex surface; and the eighth lens has positive focal power, and the first side surface of the eighth lens is a convex surface. According to the invention, the problems of long exit pupil position, small telecentricity, long back focal length, high resolution, small aperture, low sensitivity and low cost of an optical lens in the prior art are solved.

Description

Technical Field

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

[0002] With the development of science and technology, more and more fields need to use optical lenses as "eyes", such as automotive, monitoring, projection, industry, etc. With the growth of demand and the development of technology, people's demands for the performance of optical lenses are becoming more and more diverse. For example, projection optical lenses, also known as projection objective lenses, usually refer to the chip surface used for imaging display as the object surface and the projection surface as the image surface; with the improvement of imaging unit pixels and the improvement of projection effects, simple projection systems can no longer meet higher imaging performance requirements.

[0003] There are various problems with existing optical lenses. For example, the existing technology requires a short exit pupil position, which cannot adapt to the requirements of the lighting system; it cannot achieve a large telecentricity and cannot adapt to the telecentric lighting system, resulting in low system efficiency; or the back focus of the existing technology cannot meet the lighting installation requirements; or the object-side telecentric projection lens in the existing technology cannot meet the resolution requirement of more than 90lp / mm; or it cannot simultaneously meet the requirements of small front and rear port diameters and miniaturization; or in order to achieve the purpose of reducing costs, the existing technology relaxes the processing tolerances of components, resulting in low production yield of finished products and the resolution cannot meet the requirements.

[0004] That is to say, the optical lenses in the prior art have the problems of long exit pupil position, small telecentricity, long back focus, high resolution, small aperture, low sensitivity and low cost, which are difficult to take into account at the same time. Summary of the invention

[0005] The main purpose of the present invention is to provide an optical lens and an electronic device to solve the problem that the optical lens in the prior art has a long exit pupil position, a small telecentricity, a long back focus, a high resolution, a small aperture, a low sensitivity and a low cost, which are difficult to take into account at the same time.

[0006] To achieve the above-mentioned object, according to one aspect of the present invention, an optical lens is provided, which comprises, from the first side to the second side, a first lens having optical power, wherein the second side surface of the first lens is a concave surface; a second lens having negative optical power, wherein the second side surface of the second lens is a concave surface; a third lens having positive optical power, wherein the second side surface of the third lens is a convex surface; a fourth lens having negative optical power, wherein the first side surface of the fourth lens is a concave surface; a fifth lens having positive optical power, wherein the second side surface of the fifth lens is a convex surface; a sixth lens having positive optical power, wherein the second side surface of the sixth lens is a convex surface; a seventh lens having positive optical power, wherein the first side surface of the seventh lens is a convex surface and the second side surface is a convex surface; and an eighth lens having positive optical power, wherein the first side surface of the eighth lens is a convex surface.

[0007] Furthermore, the first lens has negative optical power, and the first side surface of the first lens is a convex surface.

[0008] Furthermore, the first lens has negative optical power, and the first side surface of the first lens is a concave surface.

[0009] Furthermore, the first lens has positive optical power, and the first side surface of the first lens is a convex surface.

[0010] Furthermore, the first side surface of the second lens is a convex surface.

[0011] Furthermore, the first side surface of the second lens is a concave surface.

[0012] Furthermore, the first side surface of the third lens is a convex surface.

[0013] Furthermore, the first side surface of the third lens is a concave surface.

[0014] Furthermore, the second side surface of the fourth lens is a concave surface.

[0015] Furthermore, the second side surface of the fourth lens is a convex surface.

[0016] Furthermore, the first side surface of the fifth lens is a convex surface.

[0017] Furthermore, the first side surface of the fifth lens is a concave surface.

[0018] Furthermore, the first side surface of the sixth lens is a concave surface.

[0019] Furthermore, the first side surface of the sixth lens is a convex surface.

[0020] Furthermore, the second side surface of the eighth lens is a convex surface.

[0021] Furthermore, the second side surface of the eighth lens is a concave surface.

[0022] Further, the second lens and the third lens are glued together to form a double glued lens; and / or the fourth lens and the fifth lens are glued together to form a double glued lens.

[0023] Furthermore, the optical lens also includes an aperture, and the aperture is arranged between the third lens and the fourth lens.

[0024] Furthermore, the total optical length of the optical lens, that is, the center distance TTL from the center of the first side of the first lens to the center of the second side of the optical lens, and the entire focal length value F of the optical lens satisfy: TTL / F≤6.1.

[0025] Furthermore, the total optical length of the optical lens, that is, the center distance TTL from the center of the first side of the first lens to the center of the second side of the optical lens, the image height H corresponding to the maximum field of view of the optical lens and the maximum field of view FOV of the optical lens satisfy: TTL / H / FOV≤0.48.

[0026] Furthermore, the total optical length of the optical lens, that is, the center distance TTL from the center of the first side of the first lens to the center of the second side surface of the optical lens and the maximum light aperture DMAX of the optical lens satisfy: TTL / DMAX≤6.

[0027] Furthermore, the lens group length of the optical lens, that is, the distance TL from the center of the first side of the first lens to the center of the second side of the last lens of the optical lens, and the maximum light clearance diameter D1 of the first side surface of the first lens corresponding to the maximum field of view of the optical lens satisfy: TL / D1≥1.6.

[0028] Furthermore, the lens group length of the optical lens, that is, the distance TL from the center of the first side of the first lens to the center of the second side of the last lens of the optical lens, and the maximum light clearance diameter D15 of the first side surface of the eighth lens corresponding to the maximum field angle of the optical lens satisfy the following relationship: TL / D15≥1.1.

[0029] Furthermore, the image height H corresponding to the maximum field angle of the optical lens, the entire focal length value F of the optical lens and the arc value θ of the maximum field angle of the optical lens satisfy: |(HF*θ) / (F*θ)|≤0.09.

[0030] Furthermore, the optical back focus of the optical lens, that is, the center distance BFL from the center of the second side of the last lens of the optical lens to the center of the second side of the optical lens, and the total optical length of the optical lens, that is, the center distance TTL from the center of the first side of the first lens to the center of the second side of the optical lens, satisfy the following conditions: BFL / TTL≥0.26.

[0031] Furthermore, the optical back focus of the optical lens, that is, the center distance BFL from the center of the second side of the last lens of the optical lens to the center of the second side of the optical lens, and the lens group length of the optical lens, that is, the distance TL from the center of the first side of the first lens to the center of the second side of the last lens of the optical lens, satisfy the following conditions: BFL / TL≥0.3.

[0032] Furthermore, the maximum field of view FOV of the optical lens, the entire 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≤65.

[0033] Further, the whole set of focal length values ​​F of the optical lens and the exit pupil position EXPP of the whole set of focal length values ​​of the optical lens relative to the second side surface satisfy: |F / EXPP|≤0.25.

[0034] Furthermore, the maximum clear aperture D16 of the second side surface of the eighth lens corresponding to the maximum field angle of the optical lens, the optical back focus 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 second side surface of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens satisfy: D16*BFL / H≥45.

[0035] Furthermore, the focal length F8 of the eighth lens element and the focal length F of the entire optical lens group satisfy: F8 / F≥2.9.

[0036] Furthermore, a center distance d7 from the aperture to the doublet lens composed of the fourth lens and the fifth lens and a lens group length of the optical lens, that is, a distance TL from the center of the first side of the first lens to the center of the second side of the last lens of the optical lens, satisfy: d7 / TL≥0.05.

[0037] Furthermore, the combined focal length F45 of the fourth lens and the fifth lens satisfies the following relationship with the entire focal length F of the optical lens group: |F45| / F≥1.

[0038] Furthermore, the focal length F6 of the sixth lens element and the focal length F7 of the seventh lens element satisfy: 0.5≤F6 / F7≤1.2.

[0039] Furthermore, the focal length F7 of the seventh lens and the focal length F8 of the eighth lens satisfy: 0.3≤F7 / F8≤1.5.

[0040] Further, a minimum value dn of the center thicknesses of the first lens to the eighth lens and a maximum value dm of the center thicknesses of the first lens to the eighth lens satisfy: 0.28≤dn / dm.

[0041] Furthermore, the focal length F5 of the fifth lens element and the focal length F of the entire optical lens group satisfy: |F5 / F|≤4.

[0042] Furthermore, the focal length F6 of the sixth lens element and the focal length F of the entire optical lens group satisfy: |F6 / F|≤7.

[0043] Furthermore, the entire focal length value F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: F / ENPD<4.

[0044] Furthermore, a radius of curvature R8 of the second side surface of the fourth lens and an optical back focus of the optical lens, that is, a distance BFL from the center of the second side of the last lens of the optical lens to the center of the second side surface of the optical lens, satisfy: |BEL / R8|≥0.6.

[0045] Furthermore, a curvature radius R8 of the second side surface of the fourth lens element and a focal length value F of the entire optical lens group satisfy: R8 / F≥-2.5.

[0046] According to another aspect of the present invention, an optical lens is provided, which includes, from the first side to the second side, in sequence: a first lens with optical power; a second lens with negative optical power; a third lens with positive optical power; a fourth lens with negative optical power; a fifth lens with positive optical power; a sixth lens with positive optical power; a seventh lens with positive optical power; and an eighth lens with positive optical power; the total optical length of the optical lens, that is, the center distance TTL from the center of the first side of the first lens to the center of the second side surface of the optical lens, the image height H corresponding to the maximum field of view angle of the optical lens, and the maximum field of view angle FOV of the optical lens satisfy the following conditions: TTL / H / FOV≤0.48.

[0047] Furthermore, the first lens has negative optical power, the first side surface of the first lens is convex, and the second side surface is concave.

[0048] Furthermore, the first lens has negative optical power, the first side surface of the first lens is a concave surface, and the second side surface of the first lens is a concave surface.

[0049] Furthermore, the first lens has positive optical power, the first side surface of the first lens is convex, and the second side surface is concave.

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

[0051] Furthermore, the first side surface of the second lens is a concave surface, and the second side surface is a concave surface.

[0052] Furthermore, the first side surface of the third lens is a convex surface, and the second side surface is a convex surface.

[0053] Furthermore, the first side surface of the third lens is a concave surface, and the second side surface is a convex surface.

[0054] Furthermore, the first side surface of the fourth lens is a concave surface, and the second side surface is a concave surface.

[0055] Furthermore, the first side surface of the fourth lens is a concave surface, and the second side surface is a convex surface.

[0056] Furthermore, the first side surface of the fifth lens is a convex surface, and the second side surface is a convex surface.

[0057] Furthermore, the first side surface of the fifth lens is a concave surface, and the second side surface is a convex surface.

[0058] Furthermore, the first side surface of the sixth lens is a concave surface, and the second side surface is a convex surface.

[0059] Furthermore, the first side surface of the sixth lens is a convex surface, and the second side surface is a convex surface.

[0060] Furthermore, the first side surface of the seventh lens is a convex surface, and the second side surface is a convex surface.

[0061] Furthermore, the first side surface of the eighth lens is a convex surface, and the second side surface is a convex surface.

[0062] Furthermore, the first side surface of the eighth lens is a convex surface, and the second side surface is a concave surface.

[0063] Further, the second lens and the third lens are glued together to form a double glued lens; and / or the fourth lens and the fifth lens are glued together to form a double glued lens.

[0064] Furthermore, the optical lens also includes an aperture, and the aperture is arranged between the third lens and the fourth lens.

[0065] Furthermore, the total optical length of the optical lens, that is, the center distance TTL from the center of the first side of the first lens to the center of the second side of the optical lens, and the entire focal length value F of the optical lens satisfy: TTL / F≤6.1.

[0066] Furthermore, the total optical length of the optical lens, that is, the center distance TTL from the center of the first side of the first lens to the center of the second side surface of the optical lens and the maximum light aperture DMAX of the optical lens satisfy: TTL / DMAX≤6.

[0067] Furthermore, the lens group length of the optical lens, that is, the distance TL from the center of the first side of the first lens to the center of the second side of the last lens of the optical lens, and the maximum light clearance diameter D1 of the first side surface of the first lens corresponding to the maximum field of view of the optical lens satisfy: TL / D1≥1.6.

[0068] Furthermore, the lens group length of the optical lens, that is, the distance TL from the center of the first side of the first lens to the center of the second side of the last lens of the optical lens, and the maximum light clearance diameter D15 of the first side surface of the eighth lens corresponding to the maximum field angle of the optical lens satisfy the following relationship: TL / D15≥1.1.

[0069] Furthermore, the image height H corresponding to the maximum field angle of the optical lens, the entire focal length value F of the optical lens and the arc value θ of the maximum field angle of the optical lens satisfy: |(HF*θ) / (F*θ)|≤0.09.

[0070] Furthermore, the optical back focus of the optical lens, that is, the center distance BFL from the center of the second side of the last lens of the optical lens to the center of the second side of the optical lens, and the total optical length of the optical lens, that is, the center distance TTL from the center of the first side of the first lens to the center of the second side of the optical lens, satisfy the following conditions: BFL / TTL≥0.26.

[0071] Furthermore, the optical back focus of the optical lens, that is, the center distance BFL from the center of the second side of the last lens of the optical lens to the center of the second side of the optical lens, and the lens group length of the optical lens, that is, the distance TL from the center of the first side of the first lens to the center of the second side of the last lens of the optical lens, satisfy the following conditions: BFL / TL≥0.3.

[0072] Furthermore, the maximum field of view FOV of the optical lens, the entire 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≤65.

[0073] Further, the whole set of focal length values ​​F of the optical lens and the exit pupil position EXPP of the whole set of focal length values ​​of the optical lens relative to the second side surface satisfy: |F / EXPP|≤0.25.

[0074] Furthermore, the maximum clear aperture D16 of the second side surface of the eighth lens corresponding to the maximum field angle of the optical lens, the optical back focus 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 second side surface of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens satisfy: D16*BFL / H≥45.

[0075] Furthermore, the focal length F8 of the eighth lens element and the focal length F of the entire optical lens group satisfy: F8 / F≥2.9.

[0076] Furthermore, a center distance d7 from the aperture to the doublet lens composed of the fourth lens and the fifth lens and a lens group length of the optical lens, that is, a distance TL from the center of the first side of the first lens to the center of the second side of the last lens of the optical lens, satisfy: d7 / TL≥0.05.

[0077] Furthermore, the combined focal length F45 of the fourth lens and the fifth lens satisfies the following relationship with the entire focal length F of the optical lens group: |F45| / F≥1.

[0078] Furthermore, the focal length F6 of the sixth lens element and the focal length F7 of the seventh lens element satisfy: 0.5≤F6 / F7≤1.2.

[0079] Furthermore, the focal length F7 of the seventh lens and the focal length F8 of the eighth lens satisfy: 0.3≤F7 / F8≤1.5.

[0080] Further, a minimum value dn of the center thicknesses of the first lens to the eighth lens and a maximum value dm of the center thicknesses of the first lens to the eighth lens satisfy: 0.28≤dn / dm.

[0081] Furthermore, the focal length F5 of the fifth lens element and the focal length F of the entire optical lens group satisfy: |F5 / F|≤4.

[0082] Furthermore, the focal length F6 of the sixth lens element and the focal length F of the entire optical lens group satisfy: |F6 / F|≤7.

[0083] Furthermore, the entire focal length value F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: F / ENPD<4.

[0084] Furthermore, a radius of curvature R8 of the second side surface of the fourth lens and an optical back focus of the optical lens, that is, a distance BFL from the center of the second side of the last lens of the optical lens to the center of the second side surface of the optical lens, satisfy: |BEL / R8|≥0.6.

[0085] Furthermore, a curvature radius R8 of the second side surface of the fourth lens element and a focal length value F of the entire optical lens group satisfy: R8 / F≥-2.5.

[0086] According to another aspect of the present invention, an electronic device is provided, comprising the above-mentioned optical lens and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

[0087] According to the technical solution of the present invention, the optical lens comprises, from the first side to the second side, a first lens having optical power, a second lens having negative optical power, a third lens having positive optical power, a fourth lens having negative optical power, a fifth lens having positive optical power, a sixth lens having positive optical power, a seventh lens having positive optical power and an eighth lens having positive optical power, wherein the second side surface of the first lens is a concave surface; the second side surface of the second lens is a concave surface; the second side surface of the third lens is a convex surface; the first side surface of the fourth lens is a concave surface; the second side surface of the fifth lens is a convex surface; the second side surface of the sixth lens is a convex surface; the first side surface of the seventh lens is a convex surface and the second side surface is a convex surface; and the first side surface of the eighth lens is a convex surface.

[0088] The first lens may have positive or negative focal power, the first side surface of the first lens may be convex or concave, and the second side surface is concave. When the first lens has negative focal power and the first side surface is convex, the focal power is negative, which has a divergent effect on the light, and the shape is convex to the first side, which is conducive to collecting more large-field light into the rear optical system, increasing the luminous flux, and the first side surface is relatively curved, which is conducive to reducing distortion; the second side surface is concave, which can control the direction of the large-angle light at the edge of the lens, and the light emitted through the second side surface can make the subsequent optical system have a larger light receiving surface. The convex-concave surface type is symmetrical with the concave-convex surface type of the sixth lens, which is conducive to reducing distortion. The first side surface is designed to be convex, which is conducive to the sliding of water droplets in practical applications and reduces the impact on imaging. When the first lens has negative focal power and the first side surface is concave, the spherical lens with negative focal power adjusts the angle of the light, so that the light trend transitions smoothly to the rear and corrects the system distortion; the first side surface is concave, which further diverges the light, so that the light trend transitions further smoothly, which is conducive to reducing system aberrations. When the first lens has positive focal power and the first side surface is convex, the first side surface is designed to be convex and has the function of converging light. The convex design of the first side surface is convenient for collecting light in a large range. The entry of a large amount of light is beneficial to improving the overall light throughput and illumination of the optical lens. At the same time, the second side surface is concave, which provides a larger receiving surface for light, so that the light transitioning to the rear will not be too sensitive, which plays a certain role in improving the resolution.

[0089] The second lens has negative optical power, and the first side surface of the second lens can be convex or concave, and the second side surface is concave. When the first side surface of the second lens is convex, the negative optical power will further diverge the light, and with the concave surface of the second side surface, it can collect as much light of a large field of view as possible to enter the rear optical system, so that the diverged light can smoothly enter the rear, and further make the light trend transition smoothly. When the first side surface of the second lens is concave, with negative optical power, it is conducive to proper diffusion of light, smooth transition of light trend, less light deflection, reduced light energy loss, and conducive to improving the illumination of the edge field of view; the double concave type will further diverge the light, adjust the light deflection angle, reduce chromatic aberration, and help reduce system sensitivity.

[0090] The third lens has positive focal length, and the first side of the third lens can be convex or concave, and the second side is convex. When the first side of the third lens is convex, the positive focal length converges the light, adjusts the light, and makes the light transition smoothly to the rear; the third lens is close to the aperture, and the surface is set to be biconvex and the curvatures of the two surfaces are close, which is conducive to collecting more light and increasing the light transmission capacity of the system. When the first side of the third lens is concave, the concave-convex surface type is matched with the front biconcave negative focal length lens to facilitate the smooth transition of light and can effectively correct chromatic aberration.

[0091] The fourth lens has negative optical power, and the first side of the fourth lens is concave, and the second side can be concave or convex. When the second side of the fourth lens is concave, the optical power is negative, which can disperse the central light and the edge light of each field of view, expand the aperture, increase the system illumination, and at the same time facilitate the correction of the aberration of the edge light and the central light to achieve high resolution; with the first side being concave, the light entering through the third lens is collected, and the second side is concave, which has a certain regulating effect on the aberration of the peripheral light, so that the resolution is improved. When the second side of the fourth lens is convex, the negative optical power lens, which is concave-convex in shape, is matched with the fifth lens with positive optical power behind the concave-convex positive optical power to correct chromatic aberration.

[0092] The fifth lens has positive focal length, and the first side surface of the fifth lens can be convex or concave, and the second side surface is convex. When the first side surface of the fifth lens is convex, the positive focal length lens is conducive to light convergence, and the shape is double convex so that the divergent light can smoothly enter the rear, further making the light trend smoothly transition, and the shape is double convex and is glued with the double concave negative focal length of the fourth lens in front to correct chromatic aberration. When the first side surface of the fifth lens is concave, the negative focal length lens, the shape is concave-convex and is matched with the fourth lens with positive focal length in front to correct chromatic aberration, and shrink the diffused light, which is conducive to reducing the system aperture.

[0093] The sixth lens has positive focal length, and the first side of the sixth lens can be concave or convex, and the second side is convex. When the first side of the sixth lens is concave, the positive focal length converges the light, and the second side is convex, which is conducive to compressing the light collected at the front end, achieving a small FNO, and effectively reducing the system CRA, etc., to improve relative illumination. When the first side of the sixth lens is convex, the double convex lens with positive focal length is conducive to compressing the light collected at the front end, deflecting the light toward the optical axis, so as to reduce the angle of the light incident on the imaging surface, achieve a small FNO, and effectively reduce the system CRA, and improve relative illumination.

[0094] The seventh lens has positive power, and the first side surface of the seventh lens is convex, and the second side surface is convex. The positive power lens optimizes the system telecentricity and corrects the system distortion, making the system an object-side telecentric system, and the double convex surface is conducive to reducing the back port diameter.

[0095] The eighth lens has positive focal power, and the first side surface of the eighth lens is convex, and the second side surface can be convex or concave. When the second side surface of the eighth lens is convex, it is a positive focal power lens, which optimizes the telecentricity of the system, and the lens shape is adjusted to be double convex so that the light trend smoothly transitions to the rear, reducing the sensitivity of the system. The convex surface of the rear surface is beneficial to the structural design and prevents the interference of the edge structure during the focusing process. When the second side surface of the eighth lens is concave, it is a positive focal power lens, which optimizes the telecentricity of the system, making the system an object-side telecentric system, and the convex surface of the rear surface is beneficial to the structural design and prevents the interference of the edge structure during the focusing process.

[0096] The present application adopts eight 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 such as back focal length, small telecentricity, high resolution, good temperature performance, high light flux, small aperture, low sensitivity, and high mass production yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0097] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0098] Figure 1 A schematic structural diagram of an optical lens according to Example 1 of the present invention is shown;

[0099] Figure 2 A schematic structural diagram of an optical lens according to Example 2 of the present invention is shown;

[0100] Figure 3 A schematic diagram showing the structure of an optical lens according to Example 3 of the present invention is shown;

[0101] Figure 4 A schematic diagram showing the structure of an optical lens according to Example 4 of the present invention is shown;

[0102] Figure 5 A schematic diagram showing the structure of an optical lens according to Example 5 of the present invention is shown;

[0103] Figure 6 A schematic diagram showing the structure of an optical lens according to Example 6 of the present invention is shown;

[0104] Figure 7 A schematic diagram showing the structure of an optical lens according to Example 7 of the present invention is shown;

[0105] Figure 8 A schematic diagram showing the structure of an optical lens according to Example 8 of the present invention is shown;

[0106] Fig. 9 A schematic diagram showing the structure of an optical lens according to Example 9 of the present invention is shown;

[0107] Fig.10 A schematic diagram of the structure of the optical lens of Example 10 of the present invention is shown. DETAILED DESCRIPTION

[0108] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0109] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0110] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0111] It should be noted that in this specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, without departing from the teaching of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0112] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the drawings. The drawings are for illustration only and are not drawn strictly to scale.

[0113] In this article, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens close to the first side is called the first side of the lens, and the surface of each lens close to the second side is called the second side of the lens. The judgment of the surface shape in the paraxial region can be based on the judgment method of the general knowledgeable person in this field, and the positive and negative R value (R refers to the radius of curvature of the paraxial region, usually refers to the R value on the lens database (lens data) in the optical software) is used to judge the concave and convex. For the first side, when the R value is positive, it is judged as a convex surface, and when the R value is negative, it is judged as a concave surface; for the second side, when the R value is positive, it is judged as a concave surface, and when the R value is negative, it is judged as a convex surface.

[0114] 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.

[0115] In an exemplary embodiment, the optical lens provided by the present application can be used as a vehicle-mounted lens. For the 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. Light from the object side can be imaged on the image side.

[0116] 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 laser radar transmitting end lens. In this case, the image side of the optical lens can be the image source side, and the object side can be the imaging side. Light from the image source side can be imaged on the imaging side.

[0117] Specifically, the optical lens of the present application is applied to an object-side telecentric projection lens. The second side surface of the optical lens is an image source surface, and the first side surface of the optical lens is an imaging surface.

[0118] In order to solve the problem that the optical lens in the prior art has a long exit pupil position, small telecentricity, long back focus, high resolution, small aperture, low sensitivity and low cost, which are difficult to take into account at the same time, the present invention provides an optical lens and an electronic device.

[0119] Embodiment 1

[0120] like Figures 1 to 10 As shown, the optical lens includes, from the first side to the second side, a first lens with optical power, a second lens with negative optical power, a third lens with positive optical power, a fourth lens with negative optical power, a fifth lens with positive optical power, a sixth lens with positive optical power, a seventh lens with positive optical power and an eighth lens with positive optical power, wherein the second side surface of the first lens is concave; the second side surface of the second lens is concave; the second side surface of the third lens is convex; the first side surface of the fourth lens is concave; the second side surface of the fifth lens is convex; the second side surface of the sixth lens is convex; the first side surface and the second side surface of the seventh lens are convex; and the first side surface of the eighth lens is convex.

[0121] The first lens may have positive or negative focal power, the first side surface of the first lens may be convex or concave, and the second side surface is concave. When the first lens has negative focal power and the first side surface is convex, the focal power is negative, which has a divergent effect on the light, and the shape is convex to the first side, which is conducive to collecting more large-field light into the rear optical system, increasing the luminous flux, and the first side surface is relatively curved, which is conducive to reducing distortion; the second side surface is concave, which can control the direction of the large-angle light at the edge of the lens, and the light emitted through the second side surface can make the subsequent optical system have a larger light receiving surface. The convex-concave surface type is symmetrical with the concave-convex surface type of the sixth lens, which is conducive to reducing distortion. The first side surface is designed to be convex, which is conducive to the sliding of water droplets in practical applications and reduces the impact on imaging. When the first lens has negative focal power and the first side surface is concave, the spherical lens with negative focal power adjusts the angle of the light, so that the light trend transitions smoothly to the rear and corrects the system distortion; the first side surface is concave, which further diverges the light, so that the light trend transitions further smoothly, which is conducive to reducing system aberrations. When the first lens has positive focal power and the first side surface is convex, the first side surface is designed to be convex and has the function of converging light. The convex design of the first side surface is convenient for collecting light in a large range. The entry of a large amount of light is beneficial to improving the overall light throughput and illumination of the optical lens. At the same time, the second side surface is concave, which provides a larger receiving surface for light, so that the light transitioning to the rear will not be too sensitive, which plays a certain role in improving the resolution.

[0122] The second lens has negative optical power, and the first side surface of the second lens can be convex or concave, and the second side surface is concave. When the first side surface of the second lens is convex, the negative optical power will further diverge the light, and with the concave surface of the second side surface, it can collect as much light of a large field of view as possible to enter the rear optical system, so that the diverged light can smoothly enter the rear, and further make the light trend transition smoothly. When the first side surface of the second lens is concave, with negative optical power, it is conducive to proper diffusion of light, smooth transition of light trend, less light deflection, reduced light energy loss, and conducive to improving the illumination of the edge field of view; the double concave type will further diverge the light, adjust the light deflection angle, reduce chromatic aberration, and help reduce system sensitivity.

[0123] The third lens has positive focal length, and the first side of the third lens can be convex or concave, and the second side is convex. When the first side of the third lens is convex, the positive focal length converges the light, adjusts the light, and makes the light transition smoothly to the rear; the third lens is close to the aperture, and the surface is set to be biconvex and the curvatures of the two surfaces are close, which is conducive to collecting more light and increasing the light transmission capacity of the system. When the first side of the third lens is concave, the concave-convex surface type is matched with the front biconcave negative focal length lens to facilitate the smooth transition of light and can effectively correct chromatic aberration.

[0124] The fourth lens has negative optical power, and the first side of the fourth lens is concave, and the second side can be concave or convex. When the second side of the fourth lens is concave, the optical power is negative, which can disperse the central light and the edge light of each field of view, expand the aperture, increase the system illumination, and at the same time facilitate the correction of the aberration of the edge light and the central light to achieve high resolution; with the first side being concave, the light entering through the third lens is collected, and the second side is concave, which has a certain regulating effect on the aberration of the peripheral light, so that the resolution is improved. When the second side of the fourth lens is convex, the negative optical power lens, which is concave-convex in shape, is matched with the fifth lens with positive optical power behind the concave-convex positive optical power to correct chromatic aberration.

[0125] The fifth lens has positive focal length, and the first side surface of the fifth lens can be convex or concave, and the second side surface is convex. When the first side surface of the fifth lens is convex, the positive focal length lens is conducive to light convergence, and the shape is double convex so that the divergent light can smoothly enter the rear, further making the light trend smoothly transition, and the shape is double convex and is glued with the double concave negative focal length of the fourth lens in front to correct chromatic aberration. When the first side surface of the fifth lens is concave, the negative focal length lens, the shape is concave-convex and is matched with the fourth lens with positive focal length in front to correct chromatic aberration, and shrink the diffused light, which is conducive to reducing the system aperture.

[0126] The sixth lens has positive focal length, and the first side of the sixth lens can be concave or convex, and the second side is convex. When the first side of the sixth lens is concave, the positive focal length converges the light, and the second side is convex, which is conducive to compressing the light collected at the front end, achieving a small FNO, and effectively reducing the system CRA, etc., to improve relative illumination. When the first side of the sixth lens is convex, the double convex lens with positive focal length is conducive to compressing the light collected at the front end, deflecting the light toward the optical axis, so as to reduce the angle of the light incident on the imaging surface, achieve a small FNO, and effectively reduce the system CRA, and improve relative illumination.

[0127] The seventh lens has positive power, and the first side surface of the seventh lens is convex, and the second side surface is convex. The positive power lens optimizes the system telecentricity and corrects the system distortion, making the system an object-side telecentric system, and the double convex surface is conducive to reducing the back port diameter.

[0128] The eighth lens has positive focal power, and the first side surface of the eighth lens is convex, and the second side surface can be convex or concave. When the second side surface of the eighth lens is convex, it is a positive focal power lens, which optimizes the telecentricity of the system, and the lens shape is adjusted to be double convex so that the light trend smoothly transitions to the rear, reducing the sensitivity of the system. The convex surface of the rear surface is beneficial to the structural design and prevents the interference of the edge structure during the focusing process. When the second side surface of the eighth lens is concave, it is a positive focal power lens, which optimizes the telecentricity of the system, making the system an object-side telecentric system, and the convex surface of the rear surface is beneficial to the structural design and prevents the interference of the edge structure during the focusing process.

[0129] The present application adopts eight 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 such as back focal length, small telecentricity, high resolution, good temperature performance, high light flux, small aperture, low sensitivity, and high mass production yield.

[0130] In this embodiment, the first lens has a negative optical power, and the first side surface of the first lens is a convex surface. The optical power is negative, which has a divergent effect on the light, and the shape is convex to the first side, which is conducive to collecting more large-field light to enter the rear optical system and increase the luminous flux. The first side is more curved, which is conducive to reducing distortion; the second side is a concave surface, which can control the direction of large-angle light at the edge of the lens. The light emitted through the second side surface can enable the subsequent optical system to have a larger light receiving surface. The convex-concave surface type is symmetrical with the concave-convex surface type of the sixth lens, which is conducive to reducing distortion. The first side is designed to be a convex surface, which is conducive to the sliding of water droplets in practical applications and reduces the impact on imaging.

[0131] In this embodiment, the first lens has negative power, and the first side surface of the first lens is a concave surface. When the first lens has negative power and the first side surface is a concave surface, the spherical lens with negative power adjusts the angle of light, so that the light trend transitions smoothly to the rear and corrects system distortion; the first side surface is a concave surface, which further diverges the light, so that the light trend transitions further smoothly, which is conducive to reducing system aberrations.

[0132] In this embodiment, the first lens has positive focal power, and the first side surface of the first lens is a convex surface. When the first lens has positive focal power and the first side surface is a convex surface, the first side surface is designed to be a convex surface, which has the function of converging light. The convex surface design of the first side surface is convenient for collecting light in a large range, and the entry of a large amount of light is conducive to improving the overall light throughput and illumination of the optical lens; at the same time, the second side surface is a concave surface, which provides a larger receiving surface for light, so that the light transitioning to the rear will not be too sensitive, which plays a certain role in improving the resolution.

[0133] In this embodiment, the first side surface of the second lens is a convex surface. The negative optical power further diverges the light, and with the concave surface of the second side surface, it can collect as much light of a large field of view as possible to enter the rear optical system, so that the divergent light can smoothly enter the rear, further making the light trend transition smoothly.

[0134] In this embodiment, the first side surface of the second lens is concave. With negative optical power, it is conducive to proper diffusion of light, smooth transition of light trend, small light deflection, reduced light energy loss, and conducive to improving the illumination of the edge field of view; the double concave type further diverges the light, adjusts the light deflection angle, reduces chromatic aberration, and is conducive to reducing system sensitivity.

[0135] In this embodiment, the first side surface of the third lens is a convex surface. When the first side surface of the third lens is a convex surface, the positive optical power converges the light, adjusts the light, and makes the light transition smoothly to the rear; the third lens is close to the aperture, and the surface shape is set to be biconvex and the curvatures of the two surfaces are close, which is conducive to collecting more light and increasing the light transmission capacity of the system.

[0136] In this embodiment, the first side surface of the third lens is a concave surface. When the first side surface of the third lens is a concave surface, the combination of the concave-convex surface and the front biconcave negative focal length lens is conducive to the smooth transition of light and can effectively correct chromatic aberration.

[0137] In this embodiment, the second side surface of the fourth lens is a concave surface. When the second side surface of the fourth lens is a concave surface, the optical power is negative, which can disperse the central light and the edge light of each field of view, expand the aperture, increase the system illumination, and at the same time facilitate the correction of the aberration of the edge light and the central light to achieve high resolution; with the first side surface being a concave surface, the light entering through the third lens is collected, and the design of the second side surface being a concave surface plays a certain role in regulating the aberration of the peripheral light, so that the resolution is improved.

[0138] In this embodiment, the second side surface of the fourth lens is convex. The negative optical power lens is concave-convex in shape and is matched with the fifth lens with positive optical power behind it to correct chromatic aberration.

[0139] In this embodiment, the first side surface of the fifth lens is convex. The positive power lens is conducive to light convergence, and the shape is double convex so that the divergent light can smoothly enter the rear, further making the light trend smoothly transition, and the shape is double convex and the front fourth lens with double concave negative power is glued to correct chromatic aberration.

[0140] In this embodiment, the first side surface of the fifth lens is concave. The negative optical power lens is concave-convex in shape and is matched with the fourth lens with positive optical power in front to correct chromatic aberration and shrink the diffused light, which is conducive to reducing the system aperture.

[0141] In this embodiment, the first side surface of the sixth lens is a concave surface. When the first side surface of the sixth lens is a concave surface, the positive optical power converges the light, and the second side surface is set as a convex surface, which is conducive to compressing the light collected at the front end, achieving a small FNO, and effectively reducing the system CRA, etc., and improving the relative illumination.

[0142] In this embodiment, the first side surface of the sixth lens is a convex surface. When the first side surface of the sixth lens is a convex surface, the biconvex lens with positive optical power is conducive to compressing the light collected at the front end, deflecting the light toward the optical axis, so as to reduce the angle of the light incident on the imaging surface, achieve a small FNO, and effectively reduce the system CRA and improve the relative illumination.

[0143] In this embodiment, the second side surface of the eighth lens is convex. When the second side surface of the eighth lens is convex, the positive power lens optimizes the system telecentricity, and the lens shape is adjusted to be double convex to make the light trend smoothly transition to the rear, reducing the system sensitivity. The convex rear surface is beneficial to the structural design and prevents edge structure interference during focusing.

[0144] In this embodiment, the second side surface of the eighth lens is concave. When the second side surface of the eighth lens is concave, the positive optical power lens optimizes the telecentricity of the system, making the system an object-side telecentric system, and the convex rear surface is beneficial to the structural design to prevent edge structure interference during focusing.

[0145] In this embodiment, the second lens and the third lens are glued to form a double glued lens; and / or the fourth lens and the fifth lens are glued to form a double glued lens. That is to say, in this embodiment, only the second lens and the third lens can be glued to form a double glued lens, or only the fourth lens and the fifth lens can be glued to form a double glued lens, or the second lens and the third lens can be glued to form a double glued lens and the fourth lens and the fifth lens can be glued to form a double glued lens. The use of double glued lenses can effectively eliminate the influence of ghost images on the optical lens and correct chromatic aberration, so that the optical lens can ensure a higher resolution on the basis of eliminating ghost images. The fourth lens with negative optical power is matched with the sixth lens with positive optical power behind it to correct chromatic aberration. The negative optical focal length of the fourth lens in the double-cemented lens has a higher refractive index (relative to the positive optical focal length of the fifth lens), so that the light can be effectively and smoothly converged at the end, so that the light can reach the imaging surface smoothly, reducing the overall weight and cost; at the same time, it can reduce the light loss caused by reflection between lenses; the combination of high and low refractive indices is conducive to the rapid transition of the front light, increases the aperture, improves the amount of light passing, and helps meet the needs of high-light-efficiency projection; and the use of double-cemented lenses reduces the air gap between the two lenses, making the overall structure of the optical system compact, while reducing the tolerance sensitivity of the lens unit such as overall eccentricity generated during the assembly process.

[0146] In this embodiment, the optical lens further includes an aperture, which is disposed between the third lens and the fourth lens. The aperture is located between the third lens and the fourth lens, and the aperture is placed in the middle position, which is conducive to the effective convergence of light entering the optical system, reducing the lens apertures at both ends of the optical system, adjusting the telecentricity of the optical lens, and reducing the assembly sensitivity of the system.

[0147] In this embodiment, the total optical length of the optical lens, that is, the center distance TTL from the center of the first side of the first lens to the center of the second side of the optical lens, and the entire focal length value F of the optical lens satisfy: TTL / F≤6.1. By controlling this conditional expression, the optical lens has better performance and meets the requirements of miniaturization. Preferably, TTL / F≤5.42.

[0148] In this embodiment, the total optical length of the optical lens, that is, the center distance TTL from the center of the first side of the first lens to the center of the second side of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following conditions: TTL / H / FOV≤0.48. Meeting this conditional expression is conducive to miniaturization of the optical system, reduction of the size of the optical machine, and optimization of the size layout. Preferably, TTL / H / FOV≤0.3.

[0149] In this embodiment, the total optical length of the optical lens, that is, the center distance TTL from the center of the first side of the first lens to the center of the second side of the optical lens, and the maximum light aperture DMAX of the optical lens satisfy: TTL / DMAX≤6. The smaller TTL / DMAX is, the more compact and smaller the entire optical lens is. Preferably, TTL / DMAX≤4.7.

[0150] In this embodiment, the length of the lens group of the optical lens, that is, the distance TL from the center of the first side of the first lens to the center of the second side of the last lens of the optical lens, and the maximum light aperture D1 of the first side surface of the first lens corresponding to the maximum field angle of the optical lens satisfy the following conditions: TL / D1≥1.6. Satisfying this conditional expression ensures that the front port diameter is small and miniaturization can be achieved. Preferably, TL / D1≥2.2.

[0151] In this embodiment, the length of the lens group of the optical lens, that is, the distance TL from the center of the first side of the first lens to the center of the second side of the last lens of the optical lens, and the maximum light aperture D15 of the first side surface of the eighth lens corresponding to the maximum field angle of the optical lens satisfy the following condition: TL / D15≥1.1. Satisfying this conditional expression ensures that the rear port diameter is small, and miniaturization can be achieved. Preferably, TL / D15≥1.4.

[0152] In this embodiment, the image height H corresponding to the maximum field angle of the optical lens, the focal length value F of the entire optical lens, and the arc value θ of the maximum field angle of the optical lens satisfy: |(HF*θ) / (F*θ)|≤0.09. This conditional expression is controlled to ensure that the focal length of the optical lens is increased while the field angle of the optical lens and the size of the imaging surface remain unchanged, thereby highlighting the imaging effect of the central area of ​​the imaging surface. Preferably, |(HF*θ) / (F*θ)|≤0.076.

[0153] In this embodiment, the optical back focus of the optical lens, that is, the center distance BFL from the center of the second side of the last lens of the optical lens to the center of the second side of the optical lens, and the optical total length of the optical lens, that is, the center distance TTL from the center of the first side of the first lens to the center of the second side of the optical lens, satisfy the following: BFL / TTL≥0.26. Meeting this conditional formula, on the basis of achieving miniaturization, the back focus length is reduced, which is conducive to the assembly of the module. Preferably, BFL / TTL≥0.3.

[0154] In this embodiment, the optical back focus of the optical lens, i.e., the center distance BFL from the center of the second side of the last lens of the optical lens to the center of the second side of the optical lens, and the lens group length of the optical lens, i.e., the distance TL from the center of the first side of the first lens to the center of the second side of the last lens of the optical lens, satisfy the following: BFL / TL≥0.3. Meeting this conditional formula, on the basis of achieving miniaturization, the back focus is long, which is beneficial to the assembly of the module. The lens group length TL is short, the structure is compact, the sensitivity of the lens to MTF is reduced, the production yield is improved, and the production cost is reduced. BFL / TL≥0.45.

[0155] In this embodiment, the maximum field of view FOV of the optical lens, the focal length value F of the entire set of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy: (FOV×F) / H≤65. When this condition is satisfied, when the field of view is constant, short focus is guaranteed, which is conducive to achieving small distortion. Preferably, (FOV×F) / H≤63.

[0156] In this embodiment, the entire focal length value F of the optical lens and the entire focal length value of the optical lens relative to the exit pupil position EXPP of the second side surface satisfy: |F / EXPP|≤0.25. When this condition is satisfied, the farther the exit pupil position is relative to the imaging surface, the smaller the telecentricity. Preferably, |F / EXPP|≤0.1.

[0157] In this embodiment, the maximum clear aperture D16 of the second side surface of the eighth lens corresponding to the maximum field angle of the optical lens, the optical back focus 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 second side surface of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens satisfy the following: D16*BFL / H≥45. When this conditional formula is satisfied, the back focus length is guaranteed under the same imaging plane and the same image height, which is conducive to achieving a small CRA. Preferably, D16*BFL / H≥50.

[0158] In this embodiment, the focal length value F8 of the eighth lens and the focal length value F of the entire optical lens group satisfy: F8 / F≥2.9. Reasonable allocation of the focal length of the eighth lens is conducive to achieving a small CRA. Preferably, F8 / F≥3.

[0159] In this embodiment, the distance d7 from the aperture to the center of the doublet lens composed of the fourth lens and the fifth lens satisfies the following condition: d7 / TL≥0.05, which satisfies the length of the lens group of the optical lens, that is, the distance TL from the center of the first side of the first lens to the center of the second side of the last lens of the optical lens. When this condition is satisfied, the air spacing distance between the aperture and the doublet lens is large, which helps to smoothly transition the light, realizes a smooth transition of the light near the aperture, and is beneficial to improving the image quality. Preferably, d7 / TL≥0.08.

[0160] In this embodiment, the combined focal length F45 of the fourth lens and the fifth lens satisfies the following relationship with the focal length F of the entire optical lens group: |F45| / F≥1. By controlling the combined focal length of the double-cemented lens, the light trend entering the double-cemented lens can be effectively controlled, and the aberration caused by the large-angle light entering through the first lens can be reduced. At the same time, the lens structure is made compact, which is conducive to miniaturization. Preferably, |F45| / F≥1.5.

[0161] In this embodiment, the focal length value F6 of the sixth lens and the focal length value F7 of the seventh lens satisfy: 0.5≤F6 / F7≤1.2. Satisfying this conditional expression ensures that the focal lengths of two adjacent lenses are similar, which helps to smoothly transition the light and improve the image quality. Preferably, 0.7≤F6 / F7≤1.

[0162] In this embodiment, the focal length F7 of the seventh lens and the focal length F8 of the eighth lens satisfy: 0.3≤F7 / F8≤1.5. Satisfying this conditional expression ensures that the focal lengths of two adjacent lenses are similar, which helps to smoothly transition the light and improve the image quality. Preferably, 0.5≤F7 / F8≤1.3.

[0163] In this embodiment, the minimum value dn of the center thickness of the first lens to the eighth lens and the maximum value dm of the center thickness of the first lens to the eighth lens satisfy: 0.28≤dn / dm. When this condition is satisfied, the center thicknesses of the first lens to the eighth lens are close, which helps to reduce the change of light deflection of the overall optical lens at high and low temperatures and has good temperature performance. Preferably, 0.33≤dn / dm.

[0164] In this embodiment, the focal length F5 of the fifth lens element satisfies the following relationship with the focal length F of the entire optical lens set: |F5 / F|≤4. The fifth lens element is preferably made of a special lens material, which helps to achieve thermal compensation by properly allocating the focal length. Preferably, |F5 / F|≤2.5.

[0165] In this embodiment, the focal length F6 of the sixth lens and the focal length F of the entire optical lens group satisfy: |F6 / F|≤7. The sixth lens is preferably made of special lens materials, and the focal length is reasonably distributed, which is helpful to achieve thermal compensation. Preferably, |F6 / F|≤5.4.

[0166] In this embodiment, the entire focal length value F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: F / ENPD<4. Satisfying this conditional expression ensures a small FNO, which is beneficial to increase the amount of light passing. Preferably, F / ENPD≤3.

[0167] In this embodiment, the radius of curvature R8 of the second side surface of the fourth lens and the optical back focus 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 second side surface of the optical lens, satisfy: |BEL / R8|≥0.6. Reasonable allocation of the radius of curvature of the second side surface of the fourth lens allows the system light to diffuse when passing through the fourth lens, which is conducive to achieving a long back focus. Preferably, |BEL / R8|≥0.98.

[0168] In this embodiment, the curvature radius R8 of the second side surface of the fourth lens satisfies the whole focal length value F of the optical lens group: R8 / F≥-2.5. By setting the second side surface of the fourth lens as a concave surface, the larger the curvature radius, the more conducive to further divergence of the light, the smoother the light trend, and the more conducive to reducing system aberrations, thereby improving resolution. Preferably, R8 / F≥-1.

[0169] Embodiment 2

[0170] like Figures 1 to 10As shown, the optical lens includes, from the first side to the second side, in sequence: a first lens with optical power; a second lens with negative optical power; a third lens with positive optical power; a fourth lens with negative optical power; a fifth lens with positive optical power; a sixth lens with positive optical power; a seventh lens with positive optical power; an eighth lens with positive optical power; the total optical length of the optical lens, i.e., the center distance TTL from the center of the first side of the first lens to the center of the second side of the optical lens, the image height H corresponding to the maximum field of view of the optical lens and the maximum field of view FOV of the optical lens satisfy: TTL / H / FOV≤0.48. Meeting this conditional formula is conducive to ensuring the miniaturization of the optical system, reducing the size of the optical machine, and optimizing the size layout. Preferably, TTL / H / FOV≤0.3.

[0171] In this embodiment, the first lens has negative optical power, the first side of the first lens is convex, and the second side is concave. The optical power is negative, which has a divergent effect on the light, and the shape is convex to the first side, which is conducive to collecting more large-field light to enter the rear optical system and increase the luminous flux. The first side is more curved, which is conducive to reducing distortion; the second side is concave, which can control the direction of large-angle light at the edge of the lens. The light emitted through the second side can make the subsequent optical system have a larger light receiving surface. The convex-concave surface type is symmetrical with the concave-convex surface type of the sixth lens, which is conducive to reducing distortion. The first side is designed to be convex, which is conducive to the sliding of water droplets in practical applications and reduces the impact on imaging.

[0172] In this embodiment, the first lens has negative optical power, the first side surface of the first lens is concave, and the second side surface is concave. When the first lens has negative optical power and the first side surface is concave, the spherical lens with negative optical power adjusts the angle of light, so that the light trend transitions smoothly to the rear and corrects system distortion; the first side surface is concave, which further diverges the light, so that the light trend transitions further smoothly, which is conducive to reducing system aberrations.

[0173] In this embodiment, the first lens has positive focal power, the first side surface of the first lens is convex, and the second side surface is concave. When the first lens has positive focal power and the first side surface is convex, the first side surface is designed to be convex, which has the function of converging light. The convex design of the first side surface is convenient for collecting light in a large range, and the entry of a large amount of light is conducive to improving the overall light throughput and illumination of the optical lens; at the same time, the second side surface is concave, which provides a larger receiving surface for light, so that the light transitioning to the rear will not be too sensitive, which plays a certain role in improving the resolution.

[0174] In this embodiment, the first side surface of the second lens is convex, and the second side surface is concave. The negative optical power further diverges the light, and with the concave surface of the second side surface, it can collect as much light of a large field of view as possible to enter the rear optical system, so that the divergent light can smoothly enter the rear, further making the light trend transition smoothly.

[0175] In this embodiment, the first side surface of the second lens is concave, and the second side surface is concave. With negative optical power, it is conducive to proper diffusion of light, smooth transition of light trend, small light deflection, reduced light energy loss, and conducive to improving the illumination of the edge field of view; the double concave type further diverges the light, adjusts the light deflection angle, reduces chromatic aberration, and is conducive to reducing system sensitivity.

[0176] In this embodiment, the first side surface of the third lens is convex, and the second side surface is convex. When the first side surface of the third lens is convex, the positive focal length converges the light, adjusts the light, and makes the light transition smoothly to the rear; the third lens is close to the aperture, and the surface shape is set to be biconvex and the curvatures of the two surfaces are close, which is conducive to collecting more light and increasing the light transmission capacity of the system.

[0177] In this embodiment, the first side surface of the third lens is concave, and the second side surface is convex. When the first side surface of the third lens is concave, the concave-convex surface type is matched with the front double concave negative focal length lens to facilitate smooth transition of light and effectively correct chromatic aberration.

[0178] In this embodiment, the first side surface of the fourth lens is a concave surface, and the second side surface is a concave surface. When the second side surface of the fourth lens is a concave surface, the optical power is negative, which can disperse the central light and the edge light of each field of view, expand the aperture, increase the system illumination, and at the same time facilitate the correction of the aberration of the edge light and the central light to achieve high resolution; with the design of the first side surface being a concave surface, collecting the light entering through the third lens, and the second side surface being a concave surface, it has a certain regulating effect on the aberration of the peripheral light, so that the resolution is improved.

[0179] In this embodiment, the first side surface of the fourth lens is concave, and the second side surface is convex. A negative power lens with a concave-convex shape is matched with a fifth lens with a positive power and a concave-convex shape behind it to correct chromatic aberration.

[0180] In this embodiment, the first side surface of the fifth lens is convex, and the second side surface is convex. The positive power lens is conducive to light convergence, and the shape is double convex so that the divergent light can smoothly enter the rear, further making the light trend smoothly transition, and the shape is double convex and the front fourth lens with double concave negative power is glued to correct chromatic aberration.

[0181] In this embodiment, the first side surface of the fifth lens is concave, and the second side surface is convex. The negative optical power lens is concave-convex in shape and is matched with the fourth lens with positive optical power in front to correct chromatic aberration and shrink the diffused light, which is conducive to reducing the system aperture.

[0182] In this embodiment, the first side surface of the sixth lens is a concave surface, and the second side surface is a convex surface. When the first side surface of the sixth lens is a concave surface, the positive optical power converges the light, and the second side surface is set as a convex surface, which is conducive to compressing the light collected at the front end, achieving a small FNO, and effectively reducing the system CRA, etc., and improving the relative illumination.

[0183] In this embodiment, the first side surface of the sixth lens is a convex surface, and the second side surface is a convex surface. When the first side surface of the sixth lens is a convex surface, the biconvex lens with positive optical power is conducive to compressing the light collected at the front end, so that the light is deflected toward the optical axis, so as to reduce the angle of the light incident on the imaging surface, achieve a small FNO, and effectively reduce the system CRA and improve the relative illumination.

[0184] In this embodiment, the first side surface of the seventh lens is convex, and the second side surface is convex. The positive power lens optimizes the system telecentricity and corrects the system distortion, making the system an object-side telecentric system, and the biconvex type is conducive to reducing the back port diameter.

[0185] In this embodiment, the first side surface of the eighth lens is convex, and the second side surface is convex. When the second side surface of the eighth lens is convex, it is a positive power lens, which optimizes the telecentricity of the system. The lens shape is adjusted to be double convex so that the light trend smoothly transitions to the rear, reducing the sensitivity of the system. The convex rear surface is beneficial to the structural design and prevents edge structure interference during focusing.

[0186] In this embodiment, the first side surface of the eighth lens is convex, and the second side surface is concave. When the second side surface of the eighth lens is concave, the positive optical power lens optimizes the telecentricity of the system, making the system an object-side telecentric system, and the convex rear surface is beneficial to the structural design to prevent edge structure interference during focusing.

[0187] The present application adopts eight 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 such as back focal length, small telecentricity, high resolution, good temperature performance, high light flux, small aperture, low sensitivity, and high mass production yield.

[0188] In this embodiment, the second lens and the third lens are glued to form a double glued lens; and / or the fourth lens and the fifth lens are glued to form a double glued lens. That is to say, in this embodiment, only the second lens and the third lens can be glued to form a double glued lens, or only the fourth lens and the fifth lens can be glued to form a double glued lens, or the second lens and the third lens can be glued to form a double glued lens and the fourth lens and the fifth lens can be glued to form a double glued lens. The use of double glued lenses can effectively eliminate the influence of ghost images on the optical lens and correct chromatic aberration, so that the optical lens can ensure a higher resolution on the basis of eliminating ghost images. The fourth lens with negative optical power is matched with the sixth lens with positive optical power behind it to correct chromatic aberration. The negative optical focal length of the fourth lens in the double-cemented lens has a higher refractive index (relative to the positive optical focal length of the fifth lens), so that the light can be effectively and smoothly converged at the end, so that the light can reach the imaging surface smoothly, reducing the overall weight and cost; at the same time, it can reduce the light loss caused by reflection between lenses; the combination of high and low refractive indices is conducive to the rapid transition of the front light, increases the aperture, improves the amount of light passing, and helps meet the needs of high-light-efficiency projection; and the use of double-cemented lenses reduces the air gap between the two lenses, making the overall structure of the optical system compact, while reducing the tolerance sensitivity of the lens unit such as overall eccentricity generated during the assembly process.

[0189] In this embodiment, the optical lens further includes an aperture, which is disposed between the third lens and the fourth lens. The aperture is located between the third lens and the fourth lens, and the aperture is placed in the middle position, which is conducive to the effective convergence of light entering the optical system, reducing the lens apertures at both ends of the optical system, adjusting the telecentricity of the optical lens, and reducing the assembly sensitivity of the system.

[0190] In this embodiment, the total optical length of the optical lens, that is, the center distance TTL from the center of the first side of the first lens to the center of the second side of the optical lens, and the entire focal length value F of the optical lens satisfy: TTL / F≤6.1. By controlling this conditional expression, the optical lens has better performance and meets the requirements of miniaturization. Preferably, TTL / F≤5.42.

[0191] In this embodiment, the total optical length of the optical lens, that is, the center distance TTL from the center of the first side of the first lens to the center of the second side of the optical lens, and the maximum light aperture DMAX of the optical lens satisfy: TTL / DMAX≤6. The smaller TTL / DMAX is, the more compact and smaller the entire optical lens is. Preferably, TTL / DMAX≤4.7.

[0192] In this embodiment, the length of the lens group of the optical lens, that is, the distance TL from the center of the first side of the first lens to the center of the second side of the last lens of the optical lens, and the maximum light aperture D1 of the first side surface of the first lens corresponding to the maximum field angle of the optical lens satisfy the following conditions: TL / D1≥1.6. Satisfying this conditional expression ensures that the front port diameter is small and miniaturization can be achieved. Preferably, TL / D1≥2.2.

[0193] In this embodiment, the length of the lens group of the optical lens, that is, the distance TL from the center of the first side of the first lens to the center of the second side of the last lens of the optical lens, and the maximum light aperture D15 of the first side surface of the eighth lens corresponding to the maximum field angle of the optical lens satisfy the following condition: TL / D15≥1.1. Satisfying this conditional expression ensures that the rear port diameter is small, and miniaturization can be achieved. Preferably, TL / D15≥1.4.

[0194] In this embodiment, the image height H corresponding to the maximum field angle of the optical lens, the focal length value F of the entire optical lens, and the arc value θ of the maximum field angle of the optical lens satisfy: |(HF*θ) / (F*θ)|≤0.09. This conditional expression is controlled to ensure that the focal length of the optical lens is increased while the field angle of the optical lens and the size of the imaging surface remain unchanged, thereby highlighting the imaging effect of the central area of ​​the imaging surface. Preferably, |(HF*θ) / (F*θ)|≤0.076.

[0195] In this embodiment, the optical back focus of the optical lens, that is, the center distance BFL from the center of the second side of the last lens of the optical lens to the center of the second side of the optical lens, and the optical total length of the optical lens, that is, the center distance TTL from the center of the first side of the first lens to the center of the second side of the optical lens, satisfy the following: BFL / TTL≥0.26. Meeting this conditional formula, on the basis of achieving miniaturization, the back focus length is reduced, which is conducive to the assembly of the module. Preferably, BFL / TTL≥0.3.

[0196] In this embodiment, the optical back focus of the optical lens, i.e., the center distance BFL from the center of the second side of the last lens of the optical lens to the center of the second side of the optical lens, and the lens group length of the optical lens, i.e., the distance TL from the center of the first side of the first lens to the center of the second side of the last lens of the optical lens, satisfy the following: BFL / TL≥0.3. Meeting this conditional formula, on the basis of achieving miniaturization, the back focus is long, which is beneficial to the assembly of the module. The lens group length TL is short, the structure is compact, the sensitivity of the lens to MTF is reduced, the production yield is improved, and the production cost is reduced. BFL / TL≥0.45.

[0197] In this embodiment, the maximum field of view FOV of the optical lens, the focal length value F of the entire set of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy: (FOV×F) / H≤65. When this condition is satisfied, when the field of view is constant, short focus is guaranteed, which is conducive to achieving small distortion. Preferably, (FOV×F) / H≤63.

[0198] In this embodiment, the entire focal length value F of the optical lens and the entire focal length value of the optical lens relative to the exit pupil position EXPP of the second side surface satisfy: |F / EXPP|≤0.25. When this condition is satisfied, the farther the exit pupil position is relative to the imaging surface, the smaller the telecentricity. Preferably, |F / EXPP|≤0.1.

[0199] In this embodiment, the maximum clear aperture D16 of the second side surface of the eighth lens corresponding to the maximum field angle of the optical lens, the optical back focus 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 second side surface of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens satisfy the following: D16*BFL / H≥45. When this conditional formula is satisfied, the back focus length is guaranteed under the same imaging plane and the same image height, which is conducive to achieving a small CRA. Preferably, D16*BFL / H≥50.

[0200] In this embodiment, the focal length value F8 of the eighth lens and the focal length value F of the entire optical lens group satisfy: F8 / F≥2.9. Reasonable allocation of the focal length of the eighth lens is conducive to achieving a small CRA. Preferably, F8 / F≥3.

[0201] In this embodiment, the distance d7 from the aperture to the center of the doublet lens composed of the fourth lens and the fifth lens satisfies the following condition: d7 / TL≥0.05, which satisfies the length of the lens group of the optical lens, that is, the distance TL from the center of the first side of the first lens to the center of the second side of the last lens of the optical lens. When this condition is satisfied, the air spacing distance between the aperture and the doublet lens is large, which helps to smoothly transition the light, realizes a smooth transition of the light near the aperture, and is beneficial to improving the image quality. Preferably, d7 / TL≥0.08.

[0202] In this embodiment, the combined focal length F45 of the fourth lens and the fifth lens satisfies the following relationship with the focal length F of the entire optical lens group: |F45| / F≥1. By controlling the combined focal length of the double-cemented lens, the light trend entering the double-cemented lens can be effectively controlled, and the aberration caused by the large-angle light entering through the first lens can be reduced. At the same time, the lens structure is made compact, which is conducive to miniaturization. Preferably, |F45| / F≥1.5.

[0203] In this embodiment, the focal length value F6 of the sixth lens and the focal length value F7 of the seventh lens satisfy: 0.5≤F6 / F7≤1.2. Satisfying this conditional expression ensures that the focal lengths of two adjacent lenses are similar, which helps to smoothly transition the light and improve the image quality. Preferably, 0.7≤F6 / F7≤1.

[0204] In this embodiment, the focal length F7 of the seventh lens and the focal length F8 of the eighth lens satisfy: 0.3≤F7 / F8≤1.5. Satisfying this conditional expression ensures that the focal lengths of two adjacent lenses are similar, which helps to smoothly transition the light and improve the image quality. Preferably, 0.5≤F7 / F8≤1.3.

[0205] In this embodiment, the minimum value dn of the center thickness of the first lens to the eighth lens and the maximum value dm of the center thickness of the first lens to the eighth lens satisfy: 0.28≤dn / dm. When this condition is satisfied, the center thicknesses of the first lens to the eighth lens are close, which helps to reduce the change of light deflection of the overall optical lens at high and low temperatures and has good temperature performance. Preferably, 0.33≤dn / dm.

[0206] In this embodiment, the focal length F5 of the fifth lens element satisfies the following relationship with the focal length F of the entire optical lens set: |F5 / F|≤4. The fifth lens element is preferably made of a special lens material, which helps to achieve thermal compensation by properly allocating the focal length. Preferably, |F5 / F|≤2.5.

[0207] In this embodiment, the focal length F6 of the sixth lens and the focal length F of the entire optical lens group satisfy: |F6 / F|≤7. The sixth lens is preferably made of special lens materials, and the focal length is reasonably distributed, which is helpful to achieve thermal compensation. Preferably, |F6 / F|≤5.4.

[0208] In this embodiment, the entire focal length value F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: F / ENPD<4. Satisfying this conditional expression ensures a small FNO, which is beneficial to increase the amount of light passing. Preferably, F / ENPD≤3.

[0209] In this embodiment, the radius of curvature R8 of the second side surface of the fourth lens and the optical back focus 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 second side surface of the optical lens, satisfy: |BEL / R8|≥0.6. Reasonable allocation of the radius of curvature of the second side surface of the fourth lens allows the system light to diffuse when passing through the fourth lens, which is conducive to achieving a long back focus. Preferably, |BEL / R8|≥0.98.

[0210] In this embodiment, the curvature radius R8 of the second side surface of the fourth lens satisfies the whole focal length value F of the optical lens set: R8 / F≥-2.5. By setting the second side surface of the fourth lens as a convex surface, the larger the curvature radius, the more conducive it is to further diverge the light, the smoother the light trend, and the more conducive it is to reduce the system aberration, thereby improving the resolution. Preferably, R8 / F≥-1.

[0211] Optionally, the optical lens may further include a color filter for correcting color deviation and a protective glass for protecting a photosensitive element located on the imaging surface.

[0212] The optical lens in the present application may use multiple lenses, such as the eight lenses mentioned above. The present 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 characteristics of aspherical lenses are: the curvature changes continuously from the center of the lens to the periphery of the lens. Unlike spherical lenses with a constant curvature from the center of the lens to the periphery of the lens, aspherical lenses have better curvature radius characteristics, and have the advantages of improving distortion aberrations and improving astigmatism aberrations. After using aspherical lenses, the aberrations that occur during imaging can be eliminated as much as possible, thereby improving imaging quality.

[0213] In an exemplary embodiment, the present solution does not limit the plastic and glass of the lens. If the focus is on temperature performance, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens can all be glass lenses. An optical lens made of glass can suppress the deviation of the back focus of the optical lens with temperature changes to improve the stability of the system. At the same time, the use of glass material can avoid the lens imaging blur caused by high and low temperature changes in the use environment, which affects the normal use of the optical lens. For example, the temperature range of the optical lens with an all-glass design is relatively wide, and stable optical performance can be maintained in the range of -40°C to 105°C. Specifically, when focusing on resolution quality and reliability, the first lens to the eighth lens can all be glass aspherical lenses. Of course, in applications where temperature stability requirements are low, the first lens to the eighth lens in the optical lens can also be made of plastic. Making optical lenses with plastic can effectively reduce production costs. Of course, the first lens to the eighth lens in the optical lens can also be made of a combination of plastic and glass.

[0214] The present application also provides an electronic device, comprising the above-mentioned optical lens and an imaging element that converts an 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 (CMOS). The electronic device may be an independent imaging device such as a digital camera, or an imaging module integrated in a mobile electronic device such as a mobile phone. The electronic device is equipped with the above-described optical lens.

[0215] However, those skilled in the art should understand that, without departing from the technical solution claimed in the present application, the number of lenses constituting the optical lens can be changed to obtain the various results and advantages described in this specification. For example, although eight lenses are described as an example in the embodiments, the optical lens is not limited to including eight lenses. If necessary, the optical lens may also include other numbers of lenses.

[0216] The following further describes examples of specific surface shapes and parameters of the optical lens applicable to the above-mentioned embodiments with reference to the accompanying drawings.

[0217] It should be noted that any one of the following examples 1 to 10 is applicable to all embodiments of the present application.

[0218] Example 1

[0219] like Figure 1 The figure shows a schematic diagram of the optical lens structure of Example 1.

[0220] like Figure 1 As shown, the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a first side surface S17 of the polarizing plate, a second side surface S18 of the polarizing plate, a first side surface S19 of the compensation plate, a second side surface S20 of the compensation plate, a first side surface S21 of the protective glass, a second side surface S22 of the protective glass, and an image source surface IMA.

[0221] The first lens L1 has negative power, the first side surface S1 of the first lens is convex, and the second side surface S2 of the first lens is concave. The second lens L2 has negative power, the first side surface S3 of the second lens is convex, and the second side surface S4 of the second lens is concave. The third lens L3 has positive power, the first side surface S5 of the third lens is convex, and the second side surface S6 of the third lens is convex. The fourth lens L4 has negative power, the first side surface S8 of the fourth lens is concave, and the second side surface S9 of the fourth lens is concave. The fifth lens L5 has positive power, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is convex. The sixth lens L6 has positive power, the first side surface S11 of the sixth lens is concave, and the second side surface S12 of the sixth lens is convex. The seventh lens L7 has positive power, the first side surface S13 of the seventh lens is convex, and the second side surface S14 of the seventh lens is convex. The eighth lens L8 has positive power, the first side surface S15 of the eighth lens is convex, and the second side surface S16 of the eighth lens is convex. Since the fourth lens L4 and the fifth lens L5 are cemented to form a doublet, the second side surface S9 of the fourth lens and the first side surface S9 of the fifth lens are the same surface.

[0222] In this example, the total effective focal length F of the optical lens is 14.464 mm, the maximum field of view FOV of the optical lens is 38.846°, and the total length TTL of the optical lens is 75.497 mm.

[0223] Table 1 shows a basic structural parameter table of the optical lens of Example 1, wherein the units of the radius of curvature and the thickness / distance are both millimeters (mm).

[0224]

[0225]

[0226] Table 1

[0227] Example 2

[0228] like Figure 2 , which is a schematic diagram of the optical lens structure of Example 2.

[0229] like Figure 2 As shown, the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a first side surface S17 of the polarizing plate, a second side surface S18 of the polarizing plate, a first side surface S19 of the compensation plate, a second side surface S20 of the compensation plate, a first side surface S21 of the protective glass, a second side surface S22 of the protective glass, and an image source surface IMA.

[0230] The first lens L1 has negative power, the first side surface S1 of the first lens is convex, and the second side surface S2 of the first lens is concave. The second lens L2 has negative power, the first side surface S3 of the second lens is convex, and the second side surface S4 of the second lens is concave. The third lens L3 has positive power, the first side surface S5 of the third lens is convex, and the second side surface S6 of the third lens is convex. The fourth lens L4 has negative power, the first side surface S8 of the fourth lens is concave, and the second side surface S9 of the fourth lens is concave. The fifth lens L5 has positive power, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is convex. The sixth lens L6 has positive power, the first side surface S11 of the sixth lens is concave, and the second side surface S12 of the sixth lens is convex. The seventh lens L7 has positive power, the first side surface S13 of the seventh lens is convex, and the second side surface S14 of the seventh lens is convex. The eighth lens L8 has positive power, the first side surface S15 of the eighth lens is convex, and the second side surface S16 of the eighth lens is convex. Since the fourth lens L4 and the fifth lens L5 are cemented to form a doublet, the second side surface S9 of the fourth lens and the first side surface S9 of the fifth lens are the same surface.

[0231] In this example, the total effective focal length F of the optical lens is 14.464 mm, the maximum field of view FOV of the optical lens is 38.799°, and the total length TTL of the optical lens is 74.502 mm.

[0232] Table 2 shows the basic structural parameters of the optical lens of Example 2, wherein the units of the radius of curvature and the thickness / distance are both millimeters (mm).

[0233]

[0234]

[0235] Table 2

[0236] Example 3

[0237] like Figure 3 The figure shows a schematic diagram of the optical lens structure of Example 3.

[0238] like Figure 3 As shown, the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a first side surface S17 of the polarizing plate, a second side surface S18 of the polarizing plate, a first side surface S19 of the compensation plate, a second side surface S20 of the compensation plate, a first side surface S21 of the protective glass, a second side surface S22 of the protective glass, and an image source surface IMA.

[0239] The first lens L1 has negative power, the first side surface S1 of the first lens is convex, and the second side surface S2 of the first lens is concave. The second lens L2 has negative power, the first side surface S3 of the second lens is convex, and the second side surface S4 of the second lens is concave. The third lens L3 has positive power, the first side surface S5 of the third lens is convex, and the second side surface S6 of the third lens is convex. The fourth lens L4 has negative power, the first side surface S8 of the fourth lens is concave, and the second side surface S9 of the fourth lens is concave. The fifth lens L5 has positive power, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is convex. The sixth lens L6 has positive power, the first side surface S11 of the sixth lens is concave, and the second side surface S12 of the sixth lens is convex. The seventh lens L7 has positive power, the first side surface S13 of the seventh lens is convex, and the second side surface S14 of the seventh lens is convex. The eighth lens L8 has positive power, the first side surface S15 of the eighth lens is convex, and the second side surface S16 of the eighth lens is concave. Since the fourth lens L4 and the fifth lens L5 are cemented to form a doublet, the second side surface S9 of the fourth lens and the first side surface S9 of the fifth lens are the same surface.

[0240] In this example, the total effective focal length F of the optical lens is 14.341 mm, the maximum field of view FOV of the optical lens is 39.016°, and the total length TTL of the optical lens is 76.6 mm.

[0241] Table 3 shows the basic structural parameter table of the optical lens of Example 3, wherein the units of the radius of curvature and thickness / distance are both millimeters (mm).

[0242]

[0243]

[0244] Table 3

[0245] Example 4

[0246] like Figure 4 The figure shows a schematic diagram of the optical lens structure of Example 4.

[0247] like Figure 4 As shown, the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a first side surface S17 of the polarizing plate, a second side surface S18 of the polarizing plate, a first side surface S19 of the compensation plate, a second side surface S20 of the compensation plate, a first side surface S21 of the protective glass, a second side surface S22 of the protective glass, and an image source surface IMA.

[0248] The first lens L1 has negative power, the first side surface S1 of the first lens is convex, and the second side surface S2 of the first lens is concave. The second lens L2 has negative power, the first side surface S3 of the second lens is convex, and the second side surface S4 of the second lens is concave. The third lens L3 has positive power, the first side surface S5 of the third lens is convex, and the second side surface S6 of the third lens is convex. The fourth lens L4 has negative power, the first side surface S8 of the fourth lens is concave, and the second side surface S9 of the fourth lens is concave. The fifth lens L5 has positive power, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is convex. The sixth lens L6 has positive power, the first side surface S11 of the sixth lens is concave, and the second side surface S12 of the sixth lens is convex. The seventh lens L7 has positive power, the first side surface S13 of the seventh lens is convex, and the second side surface S14 of the seventh lens is convex. The eighth lens L8 has positive power, the first side surface S15 of the eighth lens is convex, and the second side surface S16 of the eighth lens is concave. Since the fourth lens L4 and the fifth lens L5 are cemented to form a doublet, the second side surface S9 of the fourth lens and the first side surface S9 of the fifth lens are the same surface.

[0249] In this example, the total effective focal length F of the optical lens is 14.376 mm, the maximum field of view FOV of the optical lens is 39.000°, and the total length TTL of the optical lens is 76.751 mm.

[0250] Table 4 shows the basic structural parameter table of the optical lens of Example 4, wherein the units of the radius of curvature and thickness / distance are both millimeters (mm).

[0251] Surf Radius Thickness Nd Vd 1 21.217 3.200 1.78 25.72 2 11.286 3.991 3 295.155 3.000 1.67 47.20 4 17.311 6.916 5 21.686 3.559 1.76 27.53 6 -34.459 2.545 STO Infinity 7.708 8 -11.977 4.500 1.85 23.79 9 48.795 4.500 1.50 81.59 10 -14.998 0.266 11 -92.483 3.500 1.50 81.59 12 -21.906 0.106 13 91.974 3.000 1.66 50.85 14 -67.501 0.110 15 28.415 3.000 1.77 49.61 16 66.223 2.100 17 Infinity 0.725 1.52 54.09 18 Infinity 21.230 19 Infinity 0.495 1.52 54.09 20 Infinity 1.600 21 Infinity 0.700 1.52 62.00 22 Infinity -0.206 IMA / /

[0252] Table 4

[0253] Example 5

[0254] like Figure 5 The figure shows a schematic diagram of the optical lens structure of Example 5.

[0255] like Figure 5 As shown, the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a first side surface S16 of the polarizing plate, a second side surface S17 of the polarizing plate, a first side surface S18 of the compensation plate, a second side surface S19 of the compensation plate, a first side surface S20 of the protective glass, a second side surface S21 of the protective glass, and an image source surface IMA.

[0256] The first lens L1 has negative power, the first side surface S1 of the first lens is concave, and the second side surface S2 of the first lens is concave. The second lens L2 has negative power, the first side surface S3 of the second lens is convex, and the second side surface S4 of the second lens is concave. The third lens L3 has positive power, the first side surface S4 of the third lens is convex, and the second side surface S5 of the third lens is convex. The fourth lens L4 has negative power, the first side surface S7 of the fourth lens is concave, and the second side surface S8 of the fourth lens is concave. The fifth lens L5 has positive power, the first side surface S8 of the fifth lens is convex, and the second side surface S9 of the fifth lens is convex. The sixth lens L6 has positive power, the first side surface S10 of the sixth lens is convex, and the second side surface S11 of the sixth lens is convex. The seventh lens L7 has positive power, the first side surface S12 of the seventh lens is convex, and the second side surface S13 of the seventh lens is convex. The eighth lens L8 has positive power, the first side surface S14 of the eighth lens is convex, and the second side surface S15 of the eighth lens is concave. Since the second lens L2 and the third lens L3 are cemented to form a doublet lens, the second side surface S4 of the second lens and the first side surface S4 of the third lens are the same surface. Since the fourth lens L4 and the fifth lens L5 are cemented to form a doublet lens, the second side surface S8 of the fourth lens and the first side surface S8 of the fifth lens are the same surface.

[0257] In this example, the total effective focal length F of the optical lens is 14.386 mm, the maximum field of view FOV of the optical lens is 39.981°, and the total length TTL of the optical lens is 75.964 mm.

[0258] Table 5 shows the basic structural parameter table of the optical lens of Example 5, wherein the units of the radius of curvature and thickness / distance are both millimeters (mm).

[0259] Surf Radius Thickness Nd Vd 1 -60.283 3.200 1.78 25.72 2 13.735 6.183 3 30.191 3.200 1.67 47.20 4 14.355 3.559 1.76 27.53 5 -27.242 5.606 STO Infinity 6.690 7 -12.500 4.500 1.85 23.79 8 64.497 4.500 1.50 81.59 9 -14.166 1.208 10 73.583 3.500 1.50 81.59 11 -38.768 0.110 12 80.102 3.200 1.66 50.85 13 -76.242 0.110 14 38.201 3.200 1.77 49.61 15 89.883 2.446 16 Infinity 0.725 1.52 54.09 17 Infinity 21.230 18 Infinity 0.495 1.52 54.09 19 Infinity 1.600 20 Infinity 0.700 1.52 62.00 21 Infinity -0.206 IMA / /

[0260] Table 5

[0261] Example 6

[0262] like Figure 6 Shown is a schematic diagram of the optical lens structure of Example 6.

[0263] like Figure 6As shown, the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a first side surface S16 of the polarizing plate, a second side surface S17 of the polarizing plate, a first side surface S18 of the compensation plate, a second side surface S19 of the compensation plate, a first side surface S20 of the protective glass, a second side surface S21 of the protective glass, and an image source surface IMA.

[0264] The first lens L1 has negative power, the first side surface S1 of the first lens is concave, and the second side surface S2 of the first lens is concave. The second lens L2 has negative power, the first side surface S3 of the second lens is convex, and the second side surface S4 of the second lens is concave. The third lens L3 has positive power, the first side surface S4 of the third lens is convex, and the second side surface S5 of the third lens is convex. The fourth lens L4 has negative power, the first side surface S7 of the fourth lens is concave, and the second side surface S8 of the fourth lens is concave. The fifth lens L5 has positive power, the first side surface S8 of the fifth lens is convex, and the second side surface S9 of the fifth lens is convex. The sixth lens L6 has positive power, the first side surface S10 of the sixth lens is convex, and the second side surface S11 of the sixth lens is convex. The seventh lens L7 has positive power, the first side surface S12 of the seventh lens is convex, and the second side surface S13 of the seventh lens is convex. The eighth lens L8 has positive power, the first side surface S14 of the eighth lens is convex, and the second side surface S15 of the eighth lens is concave. Since the second lens L2 and the third lens L3 are cemented to form a doublet lens, the second side surface S4 of the second lens and the first side surface S4 of the third lens are the same surface. Since the fourth lens L4 and the fifth lens L5 are cemented to form a doublet lens, the second side surface S8 of the fourth lens and the first side surface S8 of the fifth lens are the same surface.

[0265] In this example, the total effective focal length F of the optical lens is 14.363 mm, the maximum field of view FOV of the optical lens is 40.003°, and the total length TTL of the optical lens is 76.025 mm.

[0266] Table 6 shows the basic structural parameter table of the optical lens of Example 6, wherein the units of the radius of curvature and thickness / distance are both millimeters (mm).

[0267] Surf Radius Thickness Nd Vd 1 -62.947 3.200 1.78 25.72 2 13.422 6.295 3 31.021 3.200 1.67 47.20 4 13.934 3.559 1.76 27.53 5 -27.242 5.465 STO Infinity 6.460 7 -13.146 4.500 1.85 23.79 8 54.198 4.500 1.50 81.59 9 -14.632 1.185 10 70.751 3.500 1.50 81.59 11 -41.006 0.105 12 87.810 3.200 1.66 50.85 13 -66.383 0.110 14 38.560 3.200 1.77 49.61 15 89.767 2.796 16 Infinity 0.725 1.52 54.09 17 Infinity 21.230 18 Infinity 0.495 1.52 54.09 19 Infinity 1.600 20 Infinity 0.700 1.52 62.00 21 Infinity -0.206 IMA / /

[0268] Table 6

[0269] Example 7

[0270] like Figure 7 The figure shows the schematic diagram of the optical lens structure of Example 7.

[0271] like Figure 7 As shown, the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a first side surface S17 of the polarizing plate, a second side surface S18 of the polarizing plate, a first side surface S19 of the compensation plate, a second side surface S20 of the compensation plate, a first side surface S21 of the protective glass, a second side surface S22 of the protective glass, and an image source surface IMA.

[0272] The first lens L1 has negative power, the first side surface S1 of the first lens is convex, and the second side surface S2 of the first lens is concave. The second lens L2 has negative power, the first side surface S3 of the second lens is concave, and the second side surface S4 of the second lens is concave. The third lens L3 has positive power, the first side surface S5 of the third lens is convex, and the second side surface S6 of the third lens is convex. The fourth lens L4 has negative power, the first side surface S8 of the fourth lens is concave, and the second side surface S9 of the fourth lens is concave. The fifth lens L5 has positive power, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is convex. The sixth lens L6 has positive power, the first side surface S11 of the sixth lens is convex, and the second side surface S12 of the sixth lens is convex. The seventh lens L7 has positive power, the first side surface S13 of the seventh lens is convex, and the second side surface S14 of the seventh lens is convex. The eighth lens L8 has positive power, the first side surface S15 of the eighth lens is convex, and the second side surface S16 of the eighth lens is concave. Since the fourth lens L4 and the fifth lens L5 are cemented to form a doublet, the second side surface S9 of the fourth lens and the first side surface S9 of the fifth lens are the same surface.

[0273] In this example, the total effective focal length F of the optical lens is 14.309 mm, the maximum field of view FOV of the optical lens is 39.902°, and the total length TTL of the optical lens is 76.751 mm.

[0274] Table 7 shows the basic structural parameter table of the optical lens of Example 7, wherein the units of the radius of curvature Radius and the thickness / distance are both millimeters (mm).

[0275] Surf Radius Thickness Nd Vd 1 55.657 3.602 1.78 25.72 2 19.104 2.144 3 -95.511 2.600 1.67 47.20 4 13.543 4.006 5 31.251 3.400 1.76 27.53 6 -23.257 2.001 STO Infinity 12.519 8 -22.202 4.601 1.85 23.79 9 45.873 4.436 1.50 81.59 10 -18.253 0.160 11 112.996 3.558 1.50 81.59 12 -35.992 0.110 13 443.850 2.999 1.66 50.85 14 -41.360 0.110 15 37.890 2.710 1.77 49.61 16 81.776 3.043 17 Infinity 0.725 1.52 54.09 18 Infinity 21.230 19 Infinity 0.495 1.52 54.09 20 Infinity 1.600 21 Infinity 0.700 1.52 62.00 IMA / / IMA / /

[0276] Table 7

[0277] Example 8

[0278] like Figure 8 Shown is a schematic diagram of the optical lens structure of Example 8.

[0279] like Figure 8As shown, the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a first side surface S17 of the polarizing plate, a second side surface S18 of the polarizing plate, a first side surface S19 of the compensation plate, a second side surface S20 of the compensation plate, a first side surface S21 of the protective glass, a second side surface S22 of the protective glass, and an image source surface IMA.

[0280] The first lens L1 has negative power, the first side surface S1 of the first lens is convex, and the second side surface S2 of the first lens is concave. The second lens L2 has negative power, the first side surface S3 of the second lens is concave, and the second side surface S4 of the second lens is concave. The third lens L3 has positive power, the first side surface S5 of the third lens is convex, and the second side surface S6 of the third lens is convex. The fourth lens L4 has negative power, the first side surface S8 of the fourth lens is concave, and the second side surface S9 of the fourth lens is concave. The fifth lens L5 has positive power, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is convex. The sixth lens L6 has positive power, the first side surface S11 of the sixth lens is convex, and the second side surface S12 of the sixth lens is convex. The seventh lens L7 has positive power, the first side surface S13 of the seventh lens is convex, and the second side surface S14 of the seventh lens is convex. The eighth lens L8 has positive power, the first side surface S15 of the eighth lens is convex, and the second side surface S16 of the eighth lens is concave. Since the fourth lens L4 and the fifth lens L5 are cemented to form a doublet, the second side surface S9 of the fourth lens and the first side surface S9 of the fifth lens are the same surface.

[0281] In this example, the total effective focal length F of the optical lens is 14.309 mm, the maximum field of view FOV of the optical lens is 39.908°, and the total length TTL of the optical lens is 76.750 mm.

[0282] Table 8 shows the basic structural parameter table of the optical lens of Example 8, wherein the units of the radius of curvature and thickness / distance are both millimeters (mm).

[0283]

[0284]

[0285] Table 8

[0286] Example 9

[0287] like Fig. 9 The figure shows a schematic diagram of the optical lens structure of Example 9.

[0288] like Fig. 9 As shown, the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a first side surface S17 of the polarizing plate, a second side surface S18 of the polarizing plate, a first side surface S19 of the compensation plate, a second side surface S20 of the compensation plate, a first side surface S21 of the protective glass, a second side surface S22 of the protective glass, and an image source surface IMA.

[0289] The first lens L1 has positive power, the first side surface S1 of the first lens is convex, and the second side surface S2 of the first lens is concave. The second lens L2 has negative power, the first side surface S3 of the second lens is concave, and the second side surface S4 of the second lens is concave. The third lens L3 has positive power, the first side surface S5 of the third lens is concave, and the second side surface S6 of the third lens is convex. The fourth lens L4 has negative power, the first side surface S8 of the fourth lens is concave, and the second side surface S9 of the fourth lens is convex. The fifth lens L5 has positive power, the first side surface S9 of the fifth lens is concave, and the second side surface S10 of the fifth lens is convex. The sixth lens L6 has positive power, the first side surface S11 of the sixth lens is convex, and the second side surface S12 of the sixth lens is convex. The seventh lens L7 has positive power, the first side surface S13 of the seventh lens is convex, and the second side surface S14 of the seventh lens is convex. The eighth lens L8 has positive power, the first side surface S15 of the eighth lens is convex, and the second side surface S16 of the eighth lens is concave. Since the fourth lens L4 and the fifth lens L5 are cemented to form a doublet, the second side surface S9 of the fourth lens and the first side surface S9 of the fifth lens are the same surface.

[0290] In this example, the total effective focal length F of the optical lens is 15.916 mm, the maximum field of view FOV of the optical lens is 38.032°, and the total length TTL of the optical lens is 76.750 mm.

[0291] Table 9 shows the basic structural parameter table of the optical lens of Example 9, wherein the units of the radius of curvature and thickness / distance are both millimeters (mm).

[0292]

[0293]

[0294] Table 9

[0295] Example 10

[0296] like Fig.10 The figure shows a schematic diagram of the optical lens structure of Example 10.

[0297] like Fig.10 As shown, the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a first side surface S17 of the polarizing plate, a second side surface S18 of the polarizing plate, a first side surface S19 of the compensation plate, a second side surface S20 of the compensation plate, a first side surface S21 of the protective glass, a second side surface S22 of the protective glass, and an image source surface IMA.

[0298] The first lens L1 has positive power, the first side surface S1 of the first lens is convex, and the second side surface S2 of the first lens is concave. The second lens L2 has negative power, the first side surface S3 of the second lens is concave, and the second side surface S4 of the second lens is concave. The third lens L3 has positive power, the first side surface S5 of the third lens is concave, and the second side surface S6 of the third lens is convex. The fourth lens L4 has negative power, the first side surface S8 of the fourth lens is concave, and the second side surface S9 of the fourth lens is convex. The fifth lens L5 has positive power, the first side surface S9 of the fifth lens is concave, and the second side surface S10 of the fifth lens is convex. The sixth lens L6 has positive power, the first side surface S11 of the sixth lens is convex, and the second side surface S12 of the sixth lens is convex. The seventh lens L7 has positive power, the first side surface S13 of the seventh lens is convex, and the second side surface S14 of the seventh lens is convex. The eighth lens L8 has positive power, the first side surface S15 of the eighth lens is convex, and the second side surface S16 of the eighth lens is concave. Since the fourth lens L4 and the fifth lens L5 are cemented to form a doublet, the second side surface S9 of the fourth lens and the first side surface S9 of the fifth lens are the same surface.

[0299] In this example, the total effective focal length F of the optical lens is 15.917 mm, the maximum field of view FOV of the optical lens is 38.028°, and the total length TTL of the optical lens is 76.751 mm.

[0300] Table 10 shows the basic structural parameter table of the optical lens of Example 10, wherein the units of the radius of curvature and thickness / distance are both millimeters (mm).

[0301]

[0302]

[0303] Table 10

[0304] In summary, Examples 1 to 10 respectively satisfy the relationship shown in Table 11.

[0305]

[0306]

[0307] Table 11

[0308] Table 12 gives the effective focal length F of the optical lenses of Examples 1 to 10, the effective focal length F1 to F8 of each lens, etc. (unit: mm).

[0309] Parameters / Examples 1 2 3 4 5 6 7 8 9 10 F 14.464 14.464 14.341 14.376 14.386 14.363 14.309 14.309 15.916 15.917 FNO 1.988 1.987 1.989 1.991 1.986 1.983 2.010 2.010 1.982 1.982 ENPD 7.275 7.281 7.210 7.219 7.246 7.243 7.118 7.118 8.031 8.031 TTL 75.497 74.502 76.600 76.751 75.964 76.025 76.751 76.750 76.750 76.751 FOV 38.846 38.799 39.016 39.000 39.981 40.003 39.902 39.908 38.032 38.028 θ 0.678 0.677 0.681 0.681 0.698 0.698 0.696 0.697 0.664 0.664 H 9.912 9.912 9.912 9.912 9.912 9.912 9.912 9.912 9.912 9.912 D 16.328 16.416 15.833 15.846 14.018 13.945 13.994 13.989 17.204 17.214 TL 48.347 47.562 49.724 49.900 48.767 48.479 48.957 48.962 49.900 49.901 BFL 27.150 26.941 26.876 26.851 27.197 27.546 27.793 27.788 26.850 26.850 L 51.933 50.819 53.174 53.334 54.009 54.100 58.998 59.006 53.405 53.358 DST 10.232 10.143 11.708 11.516 11.223 11.404 11.175 11.179 9.795 9.799 DMAX 22.552 22.279 21.816 22.113 23.065 22.974 24.496 24.497 24.242 24.226 F1 -39.073 -40.783 -34.455 -35.276 -13.763 -13.619 -38.143 -38.126 37.748 37.738 F2 -25.621 -25.546 -27.156 -27.324 -44.075 -40.482 -17.379 -17.379 -16.301 -16.298 F3 18.298 18.309 17.571 17.851 12.735 12.493 17.875 17.868 62.148 61.700 F4 -10.398 -10.398 -10.717 -10.792 -11.833 -11.911 -16.838 -16.836 -16.099 -16.195 F5 25.178 25.133 22.968 23.518 23.703 23.578 26.755 26.756 31.625 31.889 F6 50.028 50.117 58.154 56.529 51.361 52.516 55.082 55.186 51.173 50.946 F7 60.178 60.096 60.478 59.086 59.326 57.422 57.134 57.029 55.019 54.977 F8 45.950 45.888 61.892 61.744 83.032 84.461 88.246 88.263 74.459 75.134 EXPP -234.326 -205.972 -248.837 -314.110 -192.935 -164.111 267.945 268.301 -178.940 -180.963 d7 5.550 5.434 7.603 7.708 6.690 6.460 12.519 12.518 6.251 6.302 dn 1.818 1.937 3.000 3.000 3.200 3.200 2.600 2.600 2.510 2.516 dm 4.585 4.597 3.559 3.559 4.500 4.500 4.601 4.601 4.885 4.911 D1 16.328 16.416 15.833 15.846 14.018 13.945 13.994 13.989 17.204 17.214 D15 22.552 22.279 21.604 21.879 22.602 22.492 23.661 23.660 23.681 23.653 D16 22.322 22.048 20.943 21.219 21.814 21.706 23.002 23.001 22.478 22.473 F45 -24.721 -24.798 -30.470 -29.862 -37.951 -38.136 -73.416 -73.375 -52.229 -52.275 R8 -11.440 -11.444 -12.090 -11.977 -12.500 -13.146 -22.202 -22.200 -12.168 -12.164

[0310] Table 12

[0311] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0312] It should be noted that the terms used herein are only for describing specific embodiments 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 form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0313] 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 numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0314] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An optical lens, characterized in that: From the first side to the second side, it includes: A first lens having optical power, wherein the second side surface of the first lens is a concave surface; A second lens having negative optical power, wherein the second side surface of the second lens is a concave surface; a third lens having positive optical power, wherein the second side surface of the third lens is a convex surface; a fourth lens having negative optical power, wherein the first side surface of the fourth lens is a concave surface; a fifth lens having positive optical power, wherein the second side surface of the fifth lens is a convex surface; a sixth lens having positive power, wherein the second side surface of the sixth lens is a convex surface; a seventh lens having positive power, wherein the first side surface of the seventh lens is convex, and the second side surface of the seventh lens is convex; An eighth lens element having positive optical power, wherein the first side surface of the eighth lens element is a convex surface.

2. The optical lens according to claim 1, characterized in that: The first lens has negative optical power, and the first side surface of the first lens is a convex surface.

3. The optical lens according to claim 1, characterized in that: The first lens has negative optical power, and the first side surface of the first lens is a concave surface.

4. The optical lens according to claim 1, characterized in that: The first lens has positive optical power, and the first side surface of the first lens is a convex surface.

5. The optical lens according to claim 1, characterized in that: The first side surface of the second lens is a convex surface.

6. The optical lens according to claim 1, characterized in that: The first side surface of the second lens is a concave surface.

7. The optical lens according to claim 1, characterized in that: The first side surface of the third lens is a convex surface.

8. The optical lens according to claim 1, characterized in that: The first side surface of the third lens is a concave surface.

9. An optical lens, characterized in that: From the first side to the second side, it includes: a first lens having optical power; a second lens having negative optical power; a third lens having positive refractive power; a fourth lens having negative optical power; a fifth lens having positive refractive power; a sixth lens having positive refractive power; a seventh lens having positive refractive power; an eighth lens having positive refractive power; The total optical length of the optical lens, that is, the center distance TTL from the center of the first side of the first lens to the center of the second side of the optical lens, the image height H corresponding to the maximum field of view of the optical lens and the maximum field of view FOV of the optical lens satisfy the following: TTL / H / FOV≤0.

48.

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

Images