Optical lens and electronic equipment

Abstract

The invention provides an optical lens and electronic equipment. The optical lens sequentially comprises, from a first side to a second side, a first lens with focal power, a second lens with focal power, a third lens with focal power and a fourth lens with focal power, the first side surface of the second lens is a concave surface, and the second side surface of the second lens is a 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 positive focal power, and the first side surface of the fourth lens is a convex surface; the first side face of the fifth lens is a convex face, and the second side face of the fifth lens is a concave face. According to the invention, the problem that small CRA, high MTF and rear focal length of an optical lens in the prior art are difficult to consider at the same time is 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] In recent years, with the development of science and technology, the demand for optical lenses in daily life has increased, and optical lenses have been applied to more and more scenes. For example, in the automobile driving industry, for driving safety, it is necessary to detect the driving environment more accurately, and optical lenses have become key devices for detecting information around the car. Among them, in the automatic driving assistance system, the laser radar lens plays an important role. The laser radar lens is a key component for the automatic driving assistance system to obtain external information. With the rapid development of the automatic driving assistance system, the laser radar lens with a wavelength band above 1300nm has higher emission energy on the basis of human eye safety, and can achieve a wider detection range. It is the main development direction of laser radar; in order to meet the requirements of safe driving and special installation positions, compared with ordinary optical lenses, the laser radar lens with a wavelength band above 1300nm is mostly matched with fiber light sources.

[0003] Most of the optical lenses in the prior art are coupled with chip light sources, and generally have a large CRA. In addition, the existing optical lenses generally have a short back focus and limited back-end space, which is not convenient for the arrangement of optical fibers.

[0004] That is to say, the optical lens in the prior art has the problem that it is difficult to take into account small CRA, high MTF and back focal length 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 small CRA, a high MTF and a back focal length that 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 first side surface of the first lens is concave, and the second side surface is convex; a second lens having negative optical power, wherein the first side surface of the second lens is concave, and the second side surface is concave; a third lens having positive optical power, wherein the second side surface of the third lens is convex; a fourth lens having positive optical power, wherein the first side surface of the fourth lens is convex; and a fifth lens having positive optical power, wherein the first side surface of the fifth lens is convex, and the second side surface is concave.

[0007] Furthermore, the first lens has positive refractive power.

[0008] Furthermore, the first lens has negative optical power.

[0009] Furthermore, the first side surface of the third lens is a concave surface.

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

[0011] Furthermore, the second side surface of the fourth lens is a convex surface.

[0012] Furthermore, the second side surface of the fourth lens is a concave surface.

[0013] Furthermore, the first lens and the second lens are glued together to form a doublet lens.

[0014] Furthermore, the optical lens also includes a stop, which is arranged on a first side of the first lens.

[0015] Furthermore, 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 imaging surface, 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 of the optical lens to the center of the second side of the last lens of the optical lens, satisfy the following conditions: BFL / TL≥0.3.

[0016] 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 imaging plane, 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 of the optical lens to the center of the imaging plane of the optical lens, satisfy the following conditions: BFL / TTL≥0.3.

[0017] Furthermore, the maximum light clearance aperture D1 of the first side surface of the first lens corresponding to the maximum field of view 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: D1 / H / FOV≤0.1.

[0018] Furthermore, the maximum light clearance aperture D1 of the first side surface of the first lens corresponding to the maximum field angle of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the arc value θ of the maximum field angle of the optical lens satisfy: D1 / H / θ≤5.

[0019] Furthermore, the maximum light clearance aperture D1 of the first side surface of the first lens corresponding to the maximum field angle of the optical lens, the image height H corresponding to the maximum field angle of the optical lens and the entire focal length value F of the optical lens satisfy: D1 / H / F≤0.2.

[0020] Furthermore, the entire focal length value F of the optical lens, the arc value θ of the maximum field angle 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: F*θ / D1≥0.3.

[0021] 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.

[0022] Furthermore, the second side semi-clear aperture D10 of the fifth 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 imaging surface, and the image height H corresponding to the maximum field angle of the optical lens satisfy: D10*BFL / H≥55.

[0023] Furthermore, the second side semi-clear aperture D10 of the fifth lens and the image height H corresponding to the maximum field angle of the optical lens satisfy: D10 / H≥2.5.

[0024] Furthermore, a curvature radius R1 of the first side surface of the first lens and a maximum light clearance diameter D1 of the first side surface of the first lens corresponding to the maximum field angle of the optical lens satisfy: R1 / D1≤-0.4.

[0025] Furthermore, the whole set focal length value F of the optical lens and the image height H corresponding to the maximum field angle of the optical lens satisfy: 0.1≤F / H≤3.

[0026] Furthermore, the focal length value F2 of the second lens and the focal length value F of the entire optical lens group satisfy: F2 / F≤-0.1.

[0027] Furthermore, the focal length value F3 of the third lens and the focal length value F of the entire optical lens group satisfy: F3 / F≥0.1.

[0028] Furthermore, the focal length value F4 of the fourth lens element and the focal length value F of the entire optical lens group satisfy: F4 / F≥0.1.

[0029] Further, the focal length F3 of the third lens, the curvature radius R6 of the second side surface of the third lens, the focal length F4 of the fourth lens and the curvature radius R7 of the first side surface of the fourth lens satisfy: -1≤F3 / R6+F4 / R7≤1.

[0030] Furthermore, the focal length F3 of the third lens element and the focal length F4 of the fourth lens element satisfy: 0.2≤F3 / F4≤1.5.

[0031] Further, the focal length F3 of the third lens element and the focal length F5 of the fifth lens element satisfy: 0.2≤F3 / F5≤1.5.

[0032] Furthermore, the focal length F4 of the fourth lens element and the focal length F5 of the fifth lens element satisfy: 0.2≤F4 / F5≤1.8.

[0033] Furthermore, the distance D between the aperture and the first side surface of the first lens is S 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 of the optical lens to the center of the second side of the last lens of the optical lens, satisfies: D S / TL≥0.001.

[0034] Furthermore, a curvature radius R2 of the second side surface of the first lens and a curvature radius R3 of the first side surface of the second lens satisfy: 0.4≤R2 / R3≤1.5.

[0035] Further, a curvature radius R3 of the first side surface of the second lens and a curvature radius R4 of the second side surface of the second lens satisfy: R3 / R4≤-0.001.

[0036] Further, a curvature radius R6 of the second side surface of the third lens and a curvature radius R7 of the first side surface of the fourth lens satisfy: |R6| / |R7|≤1.5.

[0037] According to another aspect of the present invention, an optical lens is provided, comprising, from a first side to a second side, in sequence: a first lens having optical power; a second lens having negative optical power; a third lens having positive optical power; a fourth lens having positive optical power; and a fifth lens having positive optical power; wherein a curvature radius R3 of a first side surface of the second lens and a curvature radius R4 of a second side surface of the second lens satisfy the following relationship: R3 / R4≤-0.001.

[0038] Furthermore, the first lens has positive optical power, the first side surface of the first lens is a concave surface, and the second side surface is a convex surface.

[0039] 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 is a convex surface.

[0040] Furthermore, the first side surface of the second lens is a concave surface, and the second side surface is a concave surface.

[0041] Furthermore, the first side surface of the third lens is a concave surface, and the second side surface is a convex surface.

[0042] Furthermore, the first side surface of the third lens is a convex surface, and the second side surface is a convex surface.

[0043] Furthermore, the first side surface of the fourth lens is a convex surface, and the second side surface is a convex surface.

[0044] Furthermore, the first side surface of the fourth lens is a convex surface, and the second side surface is a concave surface.

[0045] Furthermore, the first side surface of the fifth lens is a convex surface, and the second side surface is a concave surface.

[0046] Furthermore, the first lens and the second lens are glued together to form a doublet lens.

[0047] Furthermore, the optical lens also includes a stop, which is arranged on a first side of the first lens.

[0048] Furthermore, 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 imaging surface, 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 of the optical lens to the center of the second side of the last lens of the optical lens, satisfy the following conditions: BFL / TL≥0.3.

[0049] 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 imaging plane, 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 of the optical lens to the center of the imaging plane of the optical lens, satisfy the following conditions: BFL / TTL≥0.3.

[0050] Furthermore, the maximum light clearance aperture D1 of the first side surface of the first lens corresponding to the maximum field of view 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: D1 / H / FOV≤0.1.

[0051] Furthermore, the maximum light clearance aperture D1 of the first side surface of the first lens corresponding to the maximum field angle of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the arc value θ of the maximum field angle of the optical lens satisfy: D1 / H / θ≤5.

[0052] Furthermore, the maximum light clearance aperture D1 of the first side surface of the first lens corresponding to the maximum field angle of the optical lens, the image height H corresponding to the maximum field angle of the optical lens and the entire focal length value F of the optical lens satisfy: D1 / H / F≤0.2.

[0053] Furthermore, the entire focal length value F of the optical lens, the arc value θ of the maximum field angle 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: F*θ / D1≥0.3.

[0054] 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.

[0055] Furthermore, the second side semi-clear aperture D10 of the fifth 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 imaging surface, and the image height H corresponding to the maximum field angle of the optical lens satisfy: D10*BFL / H≥55.

[0056] Furthermore, the second side semi-clear aperture D10 of the fifth lens and the image height H corresponding to the maximum field angle of the optical lens satisfy: D10 / H≥2.5.

[0057] Furthermore, a curvature radius R1 of the first side surface of the first lens and a maximum light clearance diameter D1 of the first side surface of the first lens corresponding to the maximum field angle of the optical lens satisfy: R1 / D1≤-0.4.

[0058] Furthermore, the whole set focal length value F of the optical lens and the image height H corresponding to the maximum field angle of the optical lens satisfy: 0.1≤F / H≤3.

[0059] Furthermore, the focal length value F2 of the second lens and the focal length value F of the entire optical lens group satisfy: F2 / F≤-0.1.

[0060] Furthermore, the focal length value F3 of the third lens and the focal length value F of the entire optical lens group satisfy: F3 / F≥0.1.

[0061] Furthermore, the focal length value F4 of the fourth lens element and the focal length value F of the entire optical lens group satisfy: F4 / F≥0.1.

[0062] Further, the focal length F3 of the third lens, the curvature radius R6 of the second side surface of the third lens, the focal length F4 of the fourth lens and the curvature radius R7 of the first side surface of the fourth lens satisfy: -1≤F3 / R6+F4 / R7≤1.

[0063] Furthermore, the focal length F3 of the third lens element and the focal length F4 of the fourth lens element satisfy: 0.2≤F3 / F4≤1.5.

[0064] Further, the focal length F3 of the third lens element and the focal length F5 of the fifth lens element satisfy: 0.2≤F3 / F5≤1.5.

[0065] Furthermore, the focal length F4 of the fourth lens element and the focal length F5 of the fifth lens element satisfy: 0.2≤F4 / F5≤1.8.

[0066] Furthermore, the distance D between the aperture and the first side surface of the first lens is S 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 of the optical lens to the center of the second side of the last lens of the optical lens, satisfies: D S / TL≥0.001.

[0067] Furthermore, a curvature radius R2 of the second side surface of the first lens and a curvature radius R3 of the first side surface of the second lens satisfy: 0.4≤R2 / R3≤1.5.

[0068] Further, a curvature radius R6 of the second side surface of the third lens and a curvature radius R7 of the first side surface of the fourth lens satisfy: |R6| / |R7|≤1.5.

[0069] 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.

[0070] By applying the technical solution of the present invention, the optical lens comprises, 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 positive optical power and a fifth lens with positive optical power, wherein the first side surface of the first lens is concave, and the second side surface is convex; the first side surface of the second lens is concave, and the second side surface is concave; the second side surface of the third lens is convex; the first side surface of the fourth lens is convex; and the first side surface of the fifth lens is convex, and the second side surface is concave.

[0071] The first lens can be of positive power or negative power, and the first side surface of the first lens is concave, and the second side surface is convex. When the first lens has positive power and the first side surface is concave, it is conducive to light diffusion. When the second side surface is convex, the light can be smoothly transferred to the rear lens, which is convenient for realizing a large diameter of the rear lens, thereby realizing a small CRA. When the first lens has negative power and the first side surface is concave, it is conducive to light diffusion. When the second side surface is convex, the light can be smoothly transferred to the rear lens, which is convenient for realizing a large diameter of the rear lens.

[0072] The second lens has negative power, and the first side surface of the second lens is concave, and the second side surface is concave. The negative power is combined with a double concave shape, which is conducive to collecting the light entering through the first lens and smoothly transitioning to the third lens. The light deflection is small, which is conducive to achieving high resolution; the negative power further diffuses the collected light, which is convenient for realizing a large aperture of the rear lens, and then realizing a small CRA.

[0073] The third lens has positive focal power, and the first side surface of the third lens can be a concave surface or a convex surface, and the second side surface of the third lens is a convex surface. When the first side surface of the third lens is a concave surface, the positive focal power is conducive to converging light, and the shape is a crescent moon. The curvature of the first side surface is large, and the shape is gentle, so that the light trend transitions smoothly. The second side surface is convex to the second side, so that the light beam begins to converge and is transmitted to the next lens, reducing the loss of light in each field of view and improving the relative illumination of each field of view. When the first side surface of the third lens is a convex surface, the positive focal power is conducive to converging light, and the shape is biconvex. The first side surface is a convex surface, and the curvature is large, and the shape is gentle, so that the light trend transitions smoothly. The second side surface is convex to the second side, so that the light beam begins to converge and is transmitted to the next lens, reducing the loss of light in each field of view and improving the relative illumination of each field of view.

[0074] The fourth lens has positive optical power, and the first side surface of the fourth lens is convex, and the second side surface can be convex or concave. When the second side surface of the fourth lens is convex, the positive optical power is conducive to converging light, and the shape is biconvex, the first side surface is convex toward the first side, so that the light converges smoothly, the second side surface has a larger curvature and a gentle shape, so that the light transitions smoothly, and the second side surface has a larger aperture, which is convenient for achieving a small CRA. When the second side surface of the fourth lens is concave, the positive optical power is conducive to converging light, and the shape is convex-concave, the first side surface is convex toward the first side, so that the light converges smoothly, the second side surface is concave, has a larger curvature and a gentle shape, so that the light transitions smoothly, and the second side surface has a larger aperture, which is convenient for achieving a small CRA.

[0075] The fifth lens has positive power, and the first side surface of the fifth lens is convex, and the second side surface is concave. The positive power is conducive to convergence of light, and the shape is a meniscus. The first side surface is convex to the first side, so that the light converges smoothly, the second side surface has a larger curvature and a gentle shape, so that the light transition is smooth, and the second side surface has a larger aperture, which is convenient for achieving a small CRA.

[0076] The present application adopts five lenses, and by optimizing the optical power and surface shape of each lens, the optical lens of the present invention has at least one beneficial effect of small CRA, high MTF, back focal length, small front port diameter, and large back port diameter. Among them, small CRA and high MTF facilitate efficient coupling of the optical lens and the optical fiber. BRIEF DESCRIPTION OF THE DRAWINGS

[0077] 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:

[0078] Figure 1 A schematic structural diagram of an optical lens according to Example 1 of the present invention is shown;

[0079] Figure 2A schematic structural diagram of an optical lens according to Example 2 of the present invention is shown;

[0080] Figure 3 A schematic diagram showing the structure of an optical lens according to Example 3 of the present invention is shown;

[0081] Figure 4 A schematic diagram showing the structure of an optical lens according to Example 4 of the present invention is shown;

[0082] Figure 5 A schematic diagram showing the structure of an optical lens according to Example 5 of the present invention is shown;

[0083] Figure 6 A schematic diagram showing the structure of an optical lens according to Example 6 of the present invention is shown;

[0084] Figure 7 A schematic diagram showing the structure of an optical lens according to Example 7 of the present invention is shown;

[0085] Figure 8 A schematic diagram showing the structure of an optical lens according to Example 8 of the present invention is shown;

[0086] Fig. 9 A schematic diagram showing the structure of an optical lens according to Example 9 of the present invention is shown;

[0087] Fig.10 A schematic diagram of the structure of the optical lens of Example 10 of the present invention is shown. DETAILED DESCRIPTION

[0088] 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.

[0089] 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.

[0090] 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.

[0091] 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.

[0092] 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.

[0093] 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.

[0094] 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.

[0095] 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.

[0096] 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, and the imaging surface of the optical lens is the image source surface.

[0097] In order to solve the problem in the prior art that it is difficult to simultaneously take into account a small CRA, a high MTF and a back focal length in an optical lens, the present invention provides an optical lens and an electronic device.

[0098] Embodiment 1

[0099] like Figures 1 to 10As 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 positive optical power and a fifth lens with positive optical power, wherein the first side surface of the first lens is concave, and the second side surface is convex; the first side surface of the second lens is concave, and the second side surface is concave; the second side surface of the third lens is convex; the first side surface of the fourth lens is convex; the first side surface of the fifth lens is convex, and the second side surface is concave.

[0100] The first lens can be of positive power or negative power, and the first side surface of the first lens is concave, and the second side surface is convex. When the first lens has positive power and the first side surface is concave, it is conducive to light diffusion. When the second side surface is convex, the light can be smoothly transferred to the rear lens, which is convenient for realizing a large diameter of the rear lens, thereby realizing a small CRA. When the first lens has negative power and the first side surface is concave, it is conducive to light diffusion. When the second side surface is convex, the light can be smoothly transferred to the rear lens, which is convenient for realizing a large diameter of the rear lens.

[0101] The second lens has negative power, and the first side surface of the second lens is concave, and the second side surface is concave. The negative power is combined with a double concave shape, which is conducive to collecting the light entering through the first lens and smoothly transitioning to the third lens. The light deflection is small, which is conducive to achieving high resolution; the negative power further diffuses the collected light, which is convenient for realizing a large aperture of the rear lens, and then realizing a small CRA.

[0102] The third lens has positive focal power, and the first side surface of the third lens can be a concave surface or a convex surface, and the second side surface of the third lens is a convex surface. When the first side surface of the third lens is a concave surface, the positive focal power is conducive to converging light, and the shape is a crescent moon. The curvature of the first side surface is large, and the shape is gentle, so that the light trend transitions smoothly. The second side surface is convex to the second side, so that the light beam begins to converge and is transmitted to the next lens, reducing the loss of light in each field of view and improving the relative illumination of each field of view. When the first side surface of the third lens is a convex surface, the positive focal power is conducive to converging light, and the shape is biconvex. The first side surface is a convex surface, and the curvature is large, and the shape is gentle, so that the light trend transitions smoothly. The second side surface is convex to the second side, so that the light beam begins to converge and is transmitted to the next lens, reducing the loss of light in each field of view and improving the relative illumination of each field of view.

[0103] The fourth lens has positive optical power, and the first side surface of the fourth lens is convex, and the second side surface can be convex or concave. When the second side surface of the fourth lens is convex, the positive optical power is conducive to converging light, and the shape is biconvex, the first side surface is convex toward the first side, so that the light converges smoothly, the second side surface has a larger curvature and a gentle shape, so that the light transitions smoothly, and the second side surface has a larger aperture, which is convenient for achieving a small CRA. When the second side surface of the fourth lens is concave, the positive optical power is conducive to converging light, and the shape is convex-concave, the first side surface is convex toward the first side, so that the light converges smoothly, the second side surface is concave, has a larger curvature and a gentle shape, so that the light transitions smoothly, and the second side surface has a larger aperture, which is convenient for achieving a small CRA.

[0104] The fifth lens has positive power, and the first side surface of the fifth lens is convex, and the second side surface is concave. The positive power is conducive to convergence of light, and the shape is a meniscus. The first side surface is convex to the first side, so that the light converges smoothly, the second side surface has a larger curvature and a gentle shape, so that the light transition is smooth, and the second side surface has a larger aperture, which is convenient for achieving a small CRA.

[0105] The present application adopts five lenses, and by optimizing the optical power and surface shape of each lens, the optical lens of the present invention has at least one beneficial effect of small CRA, high MTF, back focal length, small front port diameter, and large back port diameter. Among them, small CRA and high MTF facilitate efficient coupling of the optical lens and the optical fiber.

[0106] In this embodiment, the first lens has positive power. The positive power and the first side surface is concave, which is conducive to light diffusion. The second side surface is convex, so that the light smoothly transitions to the rear lens, which is convenient for realizing a large diameter of the rear lens, thereby realizing a small CRA.

[0107] In this embodiment, the first lens has negative optical power. Negative optical power and a concave first side surface are conducive to light diffusion, and the second side surface is convex, so that the light smoothly transitions to the rear lens, which is convenient for realizing a large diameter of the rear lens.

[0108] In this embodiment, the first side surface of the third lens is concave. The positive focal length is conducive to convergence of light, and the shape is a meniscus. The curvature of the first side surface is large and the shape is gentle, so that the light trend transitions smoothly. The second side surface is convex to the second side, so that the light beam begins to converge and is transmitted to the next lens, reducing the loss of light in each field of view and improving the relative illumination of each field of view.

[0109] In this embodiment, the first side surface of the third lens is convex. The positive focal length is conducive to convergence of light, and the shape is biconvex, the first side surface is convex, and the curvature is large, the shape is gentle, so that the light trend transitions smoothly, and the second side surface is convex to the second side, so that the light beam begins to converge and is transmitted to the next lens, reducing the loss of light in each field of view and improving the relative illumination of each field of view.

[0110] In this embodiment, the second side surface of the fourth lens is a convex surface. The positive optical power is conducive to convergence of light, and the shape is biconvex, the first side surface is convex to the first side, so that the light converges smoothly, the second side surface has a larger curvature and a gentle shape, so that the light transitions smoothly, and the second side surface has a larger aperture, which is convenient for achieving a small CRA.

[0111] In this embodiment, the second side surface of the fourth lens is a concave surface. The positive optical power is conducive to convergence of light, and the shape is convex-concave. The first side surface is convex toward the first side, so that the light converges smoothly, and the second side surface is a concave surface with a large curvature and a gentle shape, so that the light transitions smoothly. The second side surface has a large aperture, which is convenient for achieving a small CRA.

[0112] In an optional solution of the present embodiment, the first lens and the second lens are glued together to form a double glued lens. In this way, the light can be smoothly transitioned to the rear optical system, reducing the total length of the optical lens. The second side surface of the first lens and the first side surface of the second lens are concave and convex in the same direction, so that the first lens and the second lens are glued together, which is beneficial to reducing the group tolerance and reducing sensitivity. At the same time, various aberrations of the optical system can be fully corrected. Under the premise of compact structure, the resolution can be improved, and the optical properties such as distortion and CRA can be optimized. Setting a double glued lens can also reduce the air gap between the two lenses and reduce the total length of the system; make the dispersion of the two lenses complementary, which is beneficial to reduce chromatic aberration and improve imaging quality; reduce the assembly components between the two lenses, reduce the process and reduce the cost; further reduce the field curvature and correct the off-axis point aberration of the system. At the same time, it is beneficial to reasonably distribute the focal length, help to achieve thermal compensation, and obtain good temperature performance.

[0113] In this embodiment, the optical lens further includes a stop, and the stop is arranged on the first side of the first lens.

[0114] In this embodiment, 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 imaging surface, and 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 of the optical lens to the center of the second side of the last lens of the optical lens, satisfy the following: BFL / TL≥0.3. When this condition is met, the back focus length is guaranteed on the basis of miniaturization, which is conducive to the assembly of the module. Preferably, BFL / TL≥0.4.

[0115] In this embodiment, the optical back focus of the optical lens, i.e., the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging surface, and the optical total length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging surface of the optical lens, satisfy the following conditions: BFL / TTL≥0.3. Controlling this conditional expression is conducive to achieving the back focus length, and can reserve space for the installation and focusing of optical elements to avoid interference with the mechanism. Preferably, BFL / TTL≥0.34.

[0116] In this embodiment, the maximum aperture D1 of the first side of the first lens corresponding to the maximum field of view 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: D1 / H / FOV≤0.1. Satisfying this conditional formula ensures that the front port diameter is small, which is conducive to miniaturization. Preferably, D1 / H / FOV≤0.08. The maximum field of view FOV is associated with the image height H, which is the field of view angle corresponding to the image height.

[0117] In this embodiment, the maximum light aperture D1 of the first side surface of the first lens corresponding to the maximum field angle of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the arc value θ of the maximum field angle of the optical lens satisfy: D1 / H / θ≤5. Satisfying this conditional expression ensures a small front port diameter, which is conducive to miniaturization. Preferably, D1 / H / θ≤4.5.

[0118] In this embodiment, the maximum light aperture D1 of the first side surface of the first lens corresponding to the maximum field angle of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the focal length value F of the entire set of the optical lens satisfy the following: D1 / H / F≤0.2. By controlling this conditional expression, under the condition of a fixed focal length, the optical lens can be provided with the characteristics of a large target surface and a small aperture. Preferably, D1 / H / F≤0.15.

[0119] In this embodiment, the entire focal length value F of the optical lens, the arc value θ of the maximum field angle 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: F*θ / D1≥0.3. Satisfying this conditional expression can make the front port diameter of the optical lens smaller and reduce the volume of the imaging system of the optical lens. Preferably, F*θ / D1≥0.4.

[0120] 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 conditional expression is satisfied, a small field of view is achieved under the same image height and focal length, which is conducive to achieving small distortion. Preferably, (FOV*F) / H≤62. The maximum field of view FOV is associated with the image height H, which is the field of view corresponding to the image height.

[0121] In this embodiment, the second side semi-clear aperture D10 of the fifth 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 imaging plane, and the image height H corresponding to the maximum field angle of the optical lens satisfy the following: D10*BFL / H≥55. When this condition is met, under the conditions of the same imaging plane and the same image height, the back focus is guaranteed, the light propagates more smoothly, and it is conducive to achieving a small CRA. Preferably, D10*BFL / H≥60.

[0122] In this embodiment, the second side semi-clear aperture D10 of the fifth lens and the image height H corresponding to the maximum field angle of the optical lens satisfy: D10 / H≥2.5. Under the condition of the same imaging plane and the same image height, the effective aperture of the last lens is large, which is conducive to the main light of the edge field of view being emitted parallel to the imaging plane, and is conducive to achieving a small CRA. Preferably, D10 / H≥3.

[0123] In this embodiment, the curvature radius R1 of the first side surface of the first lens and the maximum aperture D1 of the first side surface of the first lens corresponding to the maximum field angle of the optical lens satisfy: R1 / D1≤-0.4. Controlling the first side surface of the first lens to be a concave surface is conducive to smoothing the light trend and improving the imaging quality. Preferably, R1 / D1≤-0.6.

[0124] In this embodiment, the focal length value F of the entire set of optical lenses and the image height H corresponding to the maximum field of view of the optical lens satisfy: 0.1≤F / H≤3. Satisfying this conditional expression ensures that the focal length and image height are controlled within a certain range, and the field of view and image height are matched, which is conducive to improving the resolution. Preferably, 1≤F / H≤2.5.

[0125] In this embodiment, the focal length value F2 of the second lens and the focal length value F of the entire optical lens group satisfy: F2 / F≤-0.1. Reasonable allocation of the focal length of the second lens is conducive to the smooth entry of the edge field light into the optical system; by setting the focal power of the second lens to negative, the negative focal length is conducive to the smooth transition of the peripheral light entering through the first lens, reducing sensitivity and improving imaging quality. Preferably, -1.8≤F2 / F≤-0.5.

[0126] In this embodiment, the focal length value F3 of the third lens and the focal length value F of the entire optical lens group satisfy: F3 / F ≥ 0.1. Reasonable allocation of the focal length of the third lens is conducive to the smooth entry of the edge field light into the optical system. By setting the focal power of the third lens to be positive, the positive focal length is conducive to the rapid convergence of the peripheral light entering through the second lens after exiting the fourth lens, thereby improving the imaging quality. Preferably, 1 ≤ F3 / F ≤ 3.

[0127] In this embodiment, the focal length value F4 of the fourth lens and the focal length value F of the entire optical lens group satisfy: F4 / F ≥ 0.1. Reasonable allocation of the focal length of the fourth lens is conducive to the smooth entry of the edge field light into the optical system; by setting the optical power of the fourth lens to be positive, the positive focal length is conducive to the rapid convergence of the peripheral light entering through the third lens after exiting the fifth lens, thereby improving the imaging quality. Preferably, 1 ≤ F4 / F ≤ 4.5.

[0128] In this embodiment, the focal length F3 of the third lens, the curvature radius R6 of the second side surface of the third lens, the focal length F4 of the fourth lens and the curvature radius R7 of the first side surface of the fourth lens satisfy: -1≤F3 / R6+F4 / R7≤1. This conditional expression is satisfied to ensure that when the light emitted from the third lens is incident on the first surface of the fourth lens, the incident light is relatively gentle, thereby reducing the tolerance sensitivity of the optical system. Preferably, -0.8≤F3 / R6+F4 / R7≤0.5.

[0129] In this embodiment, the focal length value F3 of the third lens and the focal length value F4 of the fourth lens satisfy: 0.2≤F3 / F4≤1.5. Satisfying this conditional expression makes the focal lengths of two adjacent lenses close, which helps to smoothly transition the light and improve the image quality. Preferably, 0.5≤F3 / F4≤1.3.

[0130] In this embodiment, the focal length F3 of the third lens and the focal length F5 of the fifth lens satisfy: 0.2≤F3 / F5≤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, 0.4≤F3 / F5≤1.2.

[0131] In this embodiment, the focal length value F4 of the fourth lens and the focal length value F5 of the fifth lens satisfy: 0.2≤F4 / F5≤1.8. 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, 0.45≤F4 / F5≤1.5.

[0132] In this embodiment, the distance D between the aperture and the first side surface of the first lens is S 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 of the optical lens to the center of the second side of the last lens of the optical lens, satisfies: D S / TL≥0.001. When this condition is met, the aperture is located in front of the optical lens, which is conducive to achieving an infinite exit pupil position, thereby achieving a small CRA; and the front end can reserve space for the steering device position, while meeting the requirements for miniaturization of the lens barrel. Preferably, 0.01≤D S / TL≤0.5. More preferably, 0.05≤D S / TL≤0.2.

[0133] In this embodiment, the curvature radius R2 of the second side surface of the first lens and the curvature radius R3 of the first side surface of the second lens satisfy: 0.4≤R2 / R3≤1.5. This conditional expression is satisfied to ensure that the curvature radius of the second side surface of the first lens is close to the curvature radius of the first side surface of the second lens, which helps to smoothly transition the light and improve the image quality. Preferably, 0.6≤R2 / R3≤1.2.

[0134] In this embodiment, the curvature radius R3 of the first side surface of the second lens and the curvature radius R4 of the second side surface of the second lens satisfy: R3 / R4≤-0.001. Setting the shape of the second lens to be biconcave is conducive to collecting the light entering through the first lens and smoothly transitioning to the third lens, and the light deflection is small, which is conducive to achieving high resolution. Preferably, R3 / R4≤-0.05.

[0135] In this embodiment, the curvature radius R6 of the second side surface of the third lens and the curvature radius R7 of the first side surface of the fourth lens satisfy: |R6| / |R7|≤1.5. The curvature radius |R6| of the second side surface of the third lens is smaller than or close to the curvature radius |R7| of the first side surface of the fourth lens. The light starts to be bent from the third lens to the imaging surface. Combined with the aperture being located at the front side of the optical lens, it is convenient to achieve a small CRA. Preferably, |R6| / |R7|≤1.2.

[0136] Embodiment 2

[0137] like Figures 1 to 10 As 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 positive optical power; a fifth lens with positive optical power; the curvature radius R3 of the first side surface of the second lens and the curvature radius R4 of the second side surface of the second lens satisfy: R3 / R4≤-0.001. Setting the shape of the second lens to be biconcave is conducive to collecting the light entering through the first lens and smoothly transitioning to the third lens, with small light deflection, which is conducive to achieving high resolution. Preferably, R3 / R4≤-0.05.

[0138] In this embodiment, the first lens has positive power, the first side surface of the first lens is concave, and the second side surface is convex. Positive power and the first side surface being concave are conducive to light diffusion, and the second side surface being convex allows the light to smoothly transition to the rear lens, facilitating the realization of a large aperture of the rear lens, thereby achieving a small CRA.

[0139] 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 convex. Negative optical power and the first side surface being concave are conducive to light diffusion, and the second side surface being convex allows the light to smoothly transition to the rear lens, facilitating the realization of a large aperture of the rear lens.

[0140] In this embodiment, the first side surface of the second lens is concave, and the second side surface is concave. The negative optical power is combined with a double concave shape, which is conducive to collecting the light entering through the first lens and smoothly transitioning to the third lens. The light deflection is small, which is conducive to achieving high resolution; the negative optical power further diffuses the collected light, which is convenient for realizing a large aperture of the rear lens, and then realizing a small CRA.

[0141] In this embodiment, the first side surface of the third lens is concave, and the second side surface is convex. The positive focal length is conducive to convergence of light, and the shape is a crescent, the first side surface has a large curvature and a gentle shape, so that the light trend transitions smoothly, and the second side surface is convex to the second side, so that the light beam begins to converge and is transmitted to the next lens, reducing the loss of light in each field of view and improving the relative illumination of each field of view.

[0142] In this embodiment, the first side surface of the third lens is convex, and the second side surface is convex. The positive focal length is conducive to convergence of light, and the shape is biconvex, the first side surface is convex, and the curvature is large, and the shape is gentle, so that the light trend transitions smoothly, and the second side surface is convex to the second side, so that the light beam begins to converge and is transmitted to the next lens, reducing the loss of light in each field of view and improving the relative illumination of each field of view.

[0143] In this embodiment, the first side surface of the fourth lens is convex, and the second side surface is convex. The positive optical power is conducive to convergence of light, and the shape is biconvex, the first side surface is convex to the first side, so that the light converges smoothly, the curvature of the second side surface is large, the shape is gentle, so that the light transitions smoothly, and the second side surface has a large aperture, which is convenient for achieving a small CRA.

[0144] In this embodiment, the first side surface of the fourth lens is convex, and the second side surface is concave. Positive optical power is conducive to convergence of light, and the shape is convex-concave. The first side surface is convex toward the first side, so that the light converges smoothly, and the second side surface is concave, with a large curvature and a gentle shape, so that the light transitions smoothly. The second side surface has a large aperture, which is convenient for achieving a small CRA.

[0145] In this embodiment, the first side surface of the fifth lens is convex, and the second side surface is concave. The positive optical power is conducive to convergence of light, and the shape is a meniscus. The first side surface is convex to the first side, so that the light converges smoothly, the second side surface has a larger curvature and a gentle shape, so that the light trend transitions smoothly, and the second side surface has a larger aperture, which is convenient for achieving a small CRA.

[0146] The present application adopts five lenses, and by optimizing the optical power and surface shape of each lens, the optical lens of the present invention has at least one beneficial effect of small CRA, high MTF, back focal length, small front port diameter, and large back port diameter. Among them, small CRA and high MTF facilitate efficient coupling of the optical lens and the optical fiber.

[0147] In an optional solution of the present embodiment, the first lens and the second lens are glued together to form a double glued lens. In this way, the light can be smoothly transitioned to the rear optical system, reducing the total length of the optical lens. The second side surface of the first lens and the first side surface of the second lens are concave and convex in the same direction, so that the first lens and the second lens are glued together, which is beneficial to reducing the group tolerance and reducing sensitivity. At the same time, various aberrations of the optical system can be fully corrected. Under the premise of compact structure, the resolution can be improved, and the optical properties such as distortion and CRA can be optimized. Setting a double glued lens can also reduce the air gap between the two lenses and reduce the total length of the system; make the dispersion of the two lenses complementary, which is beneficial to reduce chromatic aberration and improve imaging quality; reduce the assembly components between the two lenses, reduce the process and reduce the cost; further reduce the field curvature and correct the off-axis point aberration of the system. At the same time, it is beneficial to reasonably distribute the focal length, help to achieve thermal compensation, and obtain good temperature performance.

[0148] In this embodiment, the optical lens further includes a stop, and the stop is arranged on the first side of the first lens.

[0149] In this embodiment, 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 imaging surface, and 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 of the optical lens to the center of the second side of the last lens of the optical lens, satisfy the following: BFL / TL≥0.3. When this condition is met, the back focus length is guaranteed on the basis of miniaturization, which is conducive to the assembly of the module. Preferably, BFL / TL≥0.4.

[0150] In this embodiment, the optical back focus of the optical lens, i.e., the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging surface, and the optical total length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging surface of the optical lens, satisfy the following conditions: BFL / TTL≥0.3. Controlling this conditional expression is conducive to achieving the back focus length, and can reserve space for the installation and focusing of optical elements to avoid interference with the mechanism. Preferably, BFL / TTL≥0.34.

[0151] In this embodiment, the maximum aperture D1 of the first side of the first lens corresponding to the maximum field of view 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: D1 / H / FOV≤0.1. Satisfying this conditional formula ensures that the front port diameter is small, which is conducive to miniaturization. Preferably, D1 / H / FOV≤0.08. The maximum field of view FOV is associated with the image height H, which is the field of view angle corresponding to the image height.

[0152] In this embodiment, the maximum light aperture D1 of the first side surface of the first lens corresponding to the maximum field angle of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the arc value θ of the maximum field angle of the optical lens satisfy: D1 / H / θ≤5. Satisfying this conditional expression ensures a small front port diameter, which is conducive to miniaturization. Preferably, D1 / H / θ≤4.5.

[0153] In this embodiment, the maximum light aperture D1 of the first side surface of the first lens corresponding to the maximum field angle of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the focal length value F of the entire set of the optical lens satisfy the following: D1 / H / F≤0.2. By controlling this conditional expression, under the condition of a fixed focal length, the optical lens can be provided with the characteristics of a large target surface and a small aperture. Preferably, D1 / H / F≤0.15.

[0154] In this embodiment, the entire focal length value F of the optical lens, the arc value θ of the maximum field angle 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: F*θ / D1≥0.3. Satisfying this conditional expression can make the front port diameter of the optical lens smaller and reduce the volume of the imaging system of the optical lens. Preferably, F*θ / D1≥0.4.

[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 conditional expression is satisfied, a small field of view is achieved under the same image height and focal length, which is conducive to achieving small distortion. Preferably, (FOV*F) / H≤62. The maximum field of view FOV is associated with the image height H, which is the field of view corresponding to the image height.

[0156] In this embodiment, the second side semi-clear aperture D10 of the fifth 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 imaging plane, and the image height H corresponding to the maximum field angle of the optical lens satisfy the following: D10*BFL / H≥55. When this condition is met, under the conditions of the same imaging plane and the same image height, the back focus is guaranteed, the light propagates more smoothly, and it is conducive to achieving a small CRA. Preferably, D10*BFL / H≥60.

[0157] In this embodiment, the second side semi-clear aperture D10 of the fifth lens and the image height H corresponding to the maximum field angle of the optical lens satisfy: D10 / H≥2.5. Under the condition of the same imaging plane and the same image height, the effective aperture of the last lens is large, which is conducive to the main light of the edge field of view being emitted parallel to the imaging plane, and is conducive to achieving a small CRA. Preferably, D10 / H≥3.

[0158] In this embodiment, the curvature radius R1 of the first side surface of the first lens and the maximum aperture D1 of the first side surface of the first lens corresponding to the maximum field angle of the optical lens satisfy: R1 / D1≤-0.4. Controlling the first side surface of the first lens to be a concave surface is conducive to smoothing the light trend and improving the imaging quality. Preferably, R1 / D1≤-0.6.

[0159] In this embodiment, the focal length value F of the entire set of optical lenses and the image height H corresponding to the maximum field of view of the optical lens satisfy: 0.1≤F / H≤3. Satisfying this conditional expression ensures that the focal length and image height are controlled within a certain range, and the field of view and image height are matched, which is conducive to improving the resolution. Preferably, 1≤F / H≤2.5.

[0160] In this embodiment, the focal length value F2 of the second lens and the focal length value F of the entire optical lens group satisfy: F2 / F≤-0.1. Reasonable allocation of the focal length of the second lens is conducive to the smooth entry of the edge field light into the optical system; by setting the focal power of the second lens to negative, the negative focal length is conducive to the smooth transition of the peripheral light entering through the first lens, reducing sensitivity and improving imaging quality. Preferably, -1.8≤F2 / F≤-0.5.

[0161] In this embodiment, the focal length value F3 of the third lens and the focal length value F of the entire optical lens group satisfy: F3 / F ≥ 0.1. Reasonable allocation of the focal length of the third lens is conducive to the smooth entry of the edge field light into the optical system. By setting the focal power of the third lens to be positive, the positive focal length is conducive to the rapid convergence of the peripheral light entering through the second lens after exiting the fourth lens, thereby improving the imaging quality. Preferably, 1 ≤ F3 / F ≤ 3.

[0162] In this embodiment, the focal length value F4 of the fourth lens and the focal length value F of the entire optical lens group satisfy: F4 / F ≥ 0.1. Reasonable allocation of the focal length of the fourth lens is conducive to the smooth entry of the edge field light into the optical system; by setting the optical power of the fourth lens to be positive, the positive focal length is conducive to the rapid convergence of the peripheral light entering through the third lens after exiting the fifth lens, thereby improving the imaging quality. Preferably, 1 ≤ F4 / F ≤ 4.5.

[0163] In this embodiment, the focal length F3 of the third lens, the curvature radius R6 of the second side surface of the third lens, the focal length F4 of the fourth lens and the curvature radius R7 of the first side surface of the fourth lens satisfy: -1≤F3 / R6+F4 / R7≤1. This conditional expression is satisfied to ensure that when the light emitted from the third lens is incident on the first surface of the fourth lens, the incident light is relatively gentle, thereby reducing the tolerance sensitivity of the optical system. Preferably, -0.8≤F3 / R6+F4 / R7≤0.5.

[0164] In this embodiment, the focal length value F3 of the third lens and the focal length value F4 of the fourth lens satisfy: 0.2≤F3 / F4≤1.5. Satisfying this conditional expression makes the focal lengths of two adjacent lenses close, which helps to smoothly transition the light and improve the image quality. Preferably, 0.5≤F3 / F4≤1.3.

[0165] In this embodiment, the focal length F3 of the third lens and the focal length F5 of the fifth lens satisfy: 0.2≤F3 / F5≤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, 0.4≤F3 / F5≤1.2.

[0166] In this embodiment, the focal length value F4 of the fourth lens and the focal length value F5 of the fifth lens satisfy: 0.2≤F4 / F5≤1.8. 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, 0.45≤F4 / F5≤1.5.

[0167] In this embodiment, the distance D between the aperture and the first side surface of the first lens is S 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 of the optical lens to the center of the second side of the last lens of the optical lens, satisfies: D S / TL≥0.001. When this condition is met, the aperture is located in front of the optical lens, which is conducive to achieving an infinite exit pupil position, thereby achieving a small CRA; and the front end can reserve space for the steering device position, while meeting the requirements for miniaturization of the lens barrel. Preferably, 0.01≤D S / TL≤0.5. More preferably, 0.05≤D S / TL≤0.2.

[0168] In this embodiment, the curvature radius R2 of the second side surface of the first lens and the curvature radius R3 of the first side surface of the second lens satisfy: 0.4≤R2 / R3≤1.5. This conditional expression is satisfied to ensure that the curvature radius of the second side surface of the first lens is close to the curvature radius of the first side surface of the second lens, which helps to smoothly transition the light and improve the image quality. Preferably, 0.6≤R2 / R3≤1.2.

[0169] In this embodiment, the curvature radius R6 of the second side surface of the third lens and the curvature radius R7 of the first side surface of the fourth lens satisfy: |R6| / |R7|≤1.5. The curvature radius |R6| of the second side surface of the third lens is smaller than or close to the curvature radius |R7| of the first side surface of the fourth lens. The light starts to be bent from the third lens to the imaging surface. Combined with the aperture being located at the front side of the optical lens, it is convenient to achieve a small CRA. Preferably, |R6| / |R7|≤1.2.

[0170] 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.

[0171] The optical lens in the present application may use multiple lenses, such as the five 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 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.

[0172] 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, and the fifth 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 wider, 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 fifth lens can all be glass aspherical lenses. Of course, in applications where temperature stability requirements are lower, the first lens to the fifth 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 fifth lens in the optical lens can also be made of a combination of plastic and glass.

[0173] 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.

[0174] 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 five lenses are described as an example in the embodiment, the optical lens is not limited to including five lenses. If necessary, the optical lens may also include other numbers of lenses.

[0175] 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.

[0176] It should be noted that any one of the following examples 1 to 10 is applicable to all embodiments of the present application.

[0177] Example 1

[0178] like Figure 1 The figure shows a schematic diagram of the optical lens structure of Example 1.

[0179] like Figure 1 As shown, the optical lens includes, from the first side to the second side, an aperture STO, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a first side surface S11 of the protective glass, a second side surface S12 of the protective glass, and an imaging surface IMA.

[0180] 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 convex. 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 positive power, the first side surface S7 of the fourth lens is convex, and the second side surface S8 of the fourth lens is convex. 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 concave.

[0181] In this example, the total effective focal length F of the optical lens is 17.191 mm, the maximum field of view FOV of the optical lens is 27.800°, and the total length TTL of the optical lens is 54.992 mm.

[0182] 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).

[0183] Surf Radius Thickness Nd Vd STO Infinity 3.1600 1 -11.8029 6.7856 1.74 49.22 2 -14.9135 0.2800 3 -19.6024 6.4391 1.59 61.25 4 94.1634 1.7200 5 -160.2899 5.1039 1.90 31.31 6 -31.3634 0.1800 7 45.6876 5.4664 1.81 33.29 8 -116.0366 0.2100 9 23.3155 6.3285 1.81 25.46 10 44.2829 8.0000 11 Infinity 1.9000 1.46 67.82 12 Infinity 12.5785 IMA / /

[0184] Table 1

[0185] Example 2

[0186] like Figure 2 , which is a schematic diagram of the optical lens structure of Example 2.

[0187] like Figure 2 As shown, the optical lens includes, from the first side to the second side, an aperture STO, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a first side surface S11 of the protective glass, a second side surface S12 of the protective glass, and an imaging surface IMA.

[0188] 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 convex. 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 positive power, the first side surface S7 of the fourth lens is convex, and the second side surface S8 of the fourth lens is convex. 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 concave.

[0189] In this example, the total effective focal length F of the optical lens is 17.216 mm, the maximum field of view FOV of the optical lens is 27.800°, and the total length TTL of the optical lens is 53.938 mm.

[0190] Table 2 shows the basic structural parameters of the optical lens of Example 2, wherein the units of the radius of curvature and thickness / distance are both millimeters (mm).

[0191] Surf Radius Thickness Nd Vd STO Infinity 3.1600 1 -11.8884 6.4604 1.74 49.22 2 -15.0051 0.2800 3 -19.5987 6.1590 1.59 61.25 4 96.9914 1.8200 5 -166.6710 5.2164 1.90 31.31 6 -31.7285 0.1800 7 46.8416 4.8192 1.81 33.29 8 -112.1255 0.2100 9 22.8887 6.3437 1.81 25.46 10 43.9908 8.0000 11 Infinity 1.9000 1.46 67.82 12 Infinity 12.5492 IMA / /

[0192] Table 2

[0193] Example 3

[0194] like Figure 3 The figure shows a schematic diagram of the optical lens structure of Example 3.

[0195] like Figure 3As shown, the optical lens includes, from the first side to the second side, an aperture STO, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a first side surface S11 of the protective glass, a second side surface S12 of the protective glass, and an imaging surface IMA.

[0196] The first lens L1 has positive power, the first side surface S1 of the first lens is concave, and the second side surface S2 of the first lens is convex. 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 positive power, the first side surface S7 of the fourth lens is convex, and the second side surface S8 of the fourth lens is convex. 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 concave.

[0197] In this example, the total effective focal length F of the optical lens is 17.150 mm, the maximum field of view FOV of the optical lens is 27.800°, and the total length TTL of the optical lens is 54.731 mm.

[0198] 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).

[0199]

[0200]

[0201] Table 3

[0202] Example 4

[0203] like Figure 4 The figure shows a schematic diagram of the optical lens structure of Example 4.

[0204] like Figure 4 As shown, the optical lens includes, from the first side to the second side, an aperture STO, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a first side surface S11 of the protective glass, a second side surface S12 of the protective glass, and an imaging surface IMA.

[0205] The first lens L1 has positive power, the first side surface S1 of the first lens is concave, and the second side surface S2 of the first lens is convex. 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 positive power, the first side surface S7 of the fourth lens is convex, and the second side surface S8 of the fourth lens is convex. 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 concave.

[0206] In this example, the total effective focal length F of the optical lens is 17.220 mm, the maximum field of view FOV of the optical lens is 27.800°, and the total length TTL of the optical lens is 54.270 mm.

[0207] 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).

[0208] Surf Radius Thickness Nd Vd STO Infinity 3.0000 1 -12.6272 6.6039 1.74 49.22 2 -15.2088 0.2000 3 -17.2658 6.6108 1.59 61.25 4 125.9786 1.7000 5 -138.8457 4.5537 1.90 31.31 6 -30.4126 0.3000 7 51.5355 5.2373 1.81 33.29 8 -92.8839 0.2000 9 22.9203 6.7458 1.81 25.46 10 44.8394 9.4296 11 Infinity 1.9000 1.46 67.82 12 Infinity 10.7891 IMA / /

[0209] Table 4

[0210] Example 5

[0211] like Figure 5 The figure shows a schematic diagram of the optical lens structure of Example 5.

[0212] like Figure 5 As shown, the optical lens includes, from the first side to the second side, an aperture STO, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a first side surface S11 of the protective glass, a second side surface S12 of the protective glass, and an imaging surface IMA.

[0213] 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 convex. 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 positive power, the first side surface S7 of the fourth lens is convex, and the second side surface S8 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 concave.

[0214] In this example, the total effective focal length F of the optical lens is 17.233 mm, the maximum field of view FOV of the optical lens is 27.800°, and the total length TTL of the optical lens is 55.446 mm.

[0215] 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).

[0216] Surf Radius Thickness Nd Vd STO Infinity 3.1600 1 -11.9523 6.9297 1.74 49.22 2 -15.1644 0.2670 3 -20.3009 6.6458 1.59 61.25 4 89.9870 1.5471 5 -188.5596 5.2779 1.90 31.31 6 -28.0050 0.1800 7 35.2263 6.2235 1.81 33.29 8 183.9048 0.2100 9 25.0122 6.6277 1.81 25.46 10 62.7929 8.0000 11 Infinity 1.9000 1.46 67.82 12 Infinity 11.6372 IMA / /

[0217] Table 5

[0218] Example 6

[0219] like Figure 6 Shown is a schematic diagram of the optical lens structure of Example 6.

[0220] like Figure 6 As shown, the optical lens includes, from the first side to the second side, an aperture STO, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a first side surface S11 of the protective glass, a second side surface S12 of the protective glass, and an imaging surface IMA.

[0221] 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 convex. 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 positive power, the first side surface S7 of the fourth lens is convex, and the second side surface S8 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 concave.

[0222] In this example, the total effective focal length F of the optical lens is 17.183 mm, the maximum field of view FOV of the optical lens is 27.800°, and the total length TTL of the optical lens is 55.385 mm.

[0223] 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).

[0224] Surf Radius Thickness Nd Vd STO Infinity 3.1600 1 -11.9234 6.9156 1.74 49.22 2 -15.1084 0.3793 3 -20.1003 6.6338 1.59 61.25 4 94.2336 1.5272 5 -166.0791 5.1645 1.90 31.31 6 -27.3079 0.1800 7 37.0713 6.2252 1.81 33.29 8 176.0001 0.2100 9 23.9060 6.6215 1.81 25.46 10 61.1041 8.0000 11 Infinity 1.9000 1.46 67.82 12 Infinity 11.6282 IMA / /

[0225] Table 6

[0226] Example 7

[0227] like Figure 7 The figure shows the schematic diagram of the optical lens structure of Example 7.

[0228] like Figure 7 As shown, the optical lens includes, from the first side to the second side, an aperture STO, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a first side surface S11 of the protective glass, a second side surface S12 of the protective glass, and an imaging surface IMA.

[0229] 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 convex. 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 positive power, the first side surface S7 of the fourth lens is convex, and the second side surface S8 of the fourth lens is convex. 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 concave.

[0230] In this example, the total effective focal length F of the optical lens is 17.119 mm, the maximum field of view FOV of the optical lens is 27.800°, and the total length TTL of the optical lens is 54.717 mm.

[0231] 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).

[0232] Surf Radius Thickness Nd Vd STO Infinity 3.1600 1 -11.7990 6.8603 1.74 49.22 2 -15.1212 0.1131 3 -23.5771 6.3846 1.59 61.25 4 51.5910 1.5733 5 165.2826 4.5518 1.90 31.31 6 -37.1855 1.5604 7 37.0258 6.2233 1.81 33.29 8 -191.2253 1.5000 9 22.8042 6.6314 1.81 25.46 10 36.0049 8.0000 11 Infinity 1.9000 1.46 67.82 12 Infinity 9.4188 IMA / /

[0233] Table 7

[0234] Example 8

[0235] like Figure 8 Shown is a schematic diagram of the optical lens structure of Example 8.

[0236] like Figure 8 As shown, the optical lens includes, from the first side to the second side, an aperture STO, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a first side surface S11 of the protective glass, a second side surface S12 of the protective glass, and an imaging surface IMA.

[0237] 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 convex. 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 positive power, the first side surface S7 of the fourth lens is convex, and the second side surface S8 of the fourth lens is convex. 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 concave.

[0238] In this example, the total effective focal length F of the optical lens is 17.187 mm, the maximum field of view FOV of the optical lens is 27.800°, and the total length TTL of the optical lens is 54.657 mm.

[0239] 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).

[0240] Surf Radius Thickness Nd Vd STO Infinity 3.1600 1 -11.8624 6.8583 1.74 49.22 2 -15.1552 0.1280 3 -23.0508 6.6041 1.59 61.25 4 54.6127 1.5668 5 180.1214 4.5628 1.90 31.31 6 -37.2984 1.2825 7 37.3282 6.2219 1.81 33.29 8 -200.6342 1.0000 9 22.9820 6.6287 1.81 25.46 10 36.9134 8.0000 11 Infinity 1.9000 1.46 67.82 12 Infinity 9.9043 IMA / /

[0241] Table 8

[0242] Example 9

[0243] like Fig. 9 The figure shows the schematic diagram of the optical lens structure of Example 9.

[0244] like Fig. 9 As shown, the optical lens includes, from the first side to the second side, an aperture STO, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a first side surface S11 of the protective glass, a second side surface S12 of the protective glass, and an imaging surface IMA.

[0245] The first lens L1 has positive focal power, the first side surface S1 of the first lens is concave, and the second side surface S2 of the first lens is convex. The second lens L2 has negative focal 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 focal 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 positive focal power, the first side surface S7 of the fourth lens is convex, and the second side surface S8 of the fourth lens is convex. The fifth lens L5 has positive focal power, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is concave. Since the first lens L1 and the second lens L2 are glued to form a double glued lens, the second side surface S2 of the first lens and the first side surface S3 of the second lens are the same surface.

[0246] In this example, the total effective focal length F of the optical lens is 17.195 mm, the maximum field of view FOV of the optical lens is 27.800°, and the total length TTL of the optical lens is 57.511 mm.

[0247] 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).

[0248]

[0249]

[0250] Table 9

[0251] Example 10

[0252] like Fig.10 The figure shows a schematic diagram of the optical lens structure of Example 10.

[0253] like Fig.10 As shown, the optical lens includes, from the first side to the second side, an aperture STO, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a first side surface S11 of the protective glass, a second side surface S12 of the protective glass, and an imaging surface IMA.

[0254] The first lens L1 has positive focal power, the first side surface S1 of the first lens is concave, and the second side surface S2 of the first lens is convex. The second lens L2 has negative focal 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 focal 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 positive focal power, the first side surface S7 of the fourth lens is convex, and the second side surface S8 of the fourth lens is convex. The fifth lens L5 has positive focal power, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is concave. Since the first lens L1 and the second lens L2 are glued to form a double glued lens, the second side surface S2 of the first lens and the first side surface S3 of the second lens are the same surface.

[0255] In this example, the total effective focal length F of the optical lens is 17.154 mm, the maximum field of view FOV of the optical lens is 27.800°, and the total length TTL of the optical lens is 57.614 mm.

[0256] 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).

[0257]

[0258]

[0259] Table 10

[0260] In summary, Examples 1 to 10 respectively satisfy the relationship shown in Table 11.

[0261] Conditional / Example 1 2 3 4 5 6 7 8 9 10 BFL / TL 0.69 0.71 0.70 0.69 0.64 0.64 0.55 0.57 0.64 0.63 BFL / TTL 0.41 0.42 0.41 0.41 0.39 0.39 0.35 0.36 0.39 0.39 D1 / H / FOV 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 D1 / H / θ 4.01 4.01 4.02 4.00 3.99 4.01 4.03 4.02 4.17 4.18 D1 / H / F 0.11 0.11 0.11 0.11 0.11 0.11 0.11 0.11 0.12 0.12 F*θ / D1 0.53 0.53 0.53 0.53 0.53 0.53 0.53 0.53 0.51 0.51 (FOV*F) / H 58.83 58.93 58.88 58.87 58.76 58.77 58.96 58.98 59.01 58.95 D10*BFL / H 73.60 73.53 71.94 70.17 69.21 70.45 63.66 65.03 72.29 72.41 D10 / H 3.27 3.28 3.19 3.17 3.21 3.27 3.30 3.28 3.23 3.24 R1 / D1 -0.75 -0.75 -0.79 -0.80 -0.76 -0.75 -0.75 -0.75 -0.80 -0.80 F / H 2.12 2.12 2.12 2.12 2.11 2.11 2.12 2.12 2.12 2.12 F2 / F -1.61 -1.62 -1.49 -1.51 -1.64 -1.64 -1.60 -1.59 -0.99 -1.01 F3 / F 2.57 2.58 2.59 2.56 2.17 2.16 2.07 2.09 2.53 2.54 F4 / F 2.50 2.51 2.50 2.52 3.20 3.46 2.37 2.39 2.71 2.80 F3 / R6+F4 / R7 -0.47 -0.48 -0.61 -0.61 0.23 0.25 0.14 0.14 -0.45 -0.49 F3 / F4 1.03 1.03 1.04 1.01 0.68 0.62 0.87 0.88 0.93 0.91 F3 / F5 0.78 0.81 0.82 0.82 0.74 0.78 0.53 0.55 0.87 0.87 F4 / F5 0.76 0.79 0.79 0.81 1.10 1.25 0.61 0.62 0.93 0.96 <![CDATA[D S / TL]]> 0.10 0.10 0.09 0.09 0.09 0.09 0.09 0.09 0.10 0.09 R2 / R3 0.76 0.77 0.89 0.88 0.75 0.75 0.64 0.66 1.00 1.00 R3 / R4 -0.21 -0.20 -0.14 -0.14 -0.23 -0.21 -0.46 -0.42 -0.11 -0.10 |R6| / |R7| -0.69 -0.68 -0.61 -0.59 -0.80 -0.74 -1.00 -1.00 -0.63 -0.59

[0262] Table 11

[0263] Table 12 gives the effective focal length F of the optical lenses of Examples 1 to 10, the effective focal length F1 to F5 of each lens, etc. (unit: mm).

[0264]

[0265]

[0266] Table 12

[0267] 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.

[0268] 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.

[0269] 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.

[0270] 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 a first side surface of the first lens is concave and a second side surface is convex; a second lens having negative optical power, wherein the first side surface of the second lens is concave, and the second side surface of the second lens is concave; a third lens having positive optical power, wherein the second side surface of the third lens is a convex surface; a fourth lens having positive optical power, wherein the first side surface of the fourth lens is a convex surface; A fifth lens having positive optical power, wherein the first side surface of the fifth lens is convex and the second side surface is concave.

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

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

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

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

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

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

8. The optical lens according to claim 1, characterized in that: The first lens and the second lens are cemented together to form a doublet lens.

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 positive refractive power; a fifth lens having positive refractive power; A curvature radius R3 of the first side surface of the second lens and a curvature radius R4 of the second side surface of the second lens satisfy: R3 / R4≤-0.

001.

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