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 negative focal power, a second lens with negative focal power, a third lens with negative focal power and a fourth lens with negative focal power, the second lens has positive focal power, and the second side surface of the second lens is a convex surface; the third lens has focal power; the fourth lens has focal power, and the second 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 convex face. The problem that miniaturization, high resolution, low cost, long back focus and good temperature performance 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 scenarios. For example, in the automobile driving industry, in order to ensure driving safety, it is necessary to detect the driving environment more accurately, and optical lenses have become a key device for detecting information around the car.

[0003] At the same time, with the rapid development of autonomous driving and assisted driving technologies based on machine vision, optical lenses have become the core components of autonomous driving and assisted driving. The existing optical lenses used in automobiles are gradually developing towards miniaturization and easy installation, but it is difficult to achieve both miniaturization and high resolution. Currently, high-resolution optical lenses often use 6 to 7 lenses, which is not conducive to the miniaturization of optical lenses, and the manufacturing cost is high, and it is difficult to achieve long back focus. In addition, it is difficult for existing optical lenses to maintain high resolution at high and low temperatures, and the performance at room temperature will also drop significantly after drastic temperature changes.

[0004] That is to say, the optical lenses in the prior art have the problem that it is difficult to simultaneously achieve miniaturization, high resolution, low cost, long back focus and good temperature performance. 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 small size, high resolution, low cost, long back focus and good temperature performance, which are difficult to achieve at the same time.

[0006] In order 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 with negative optical power, the first side surface of the first lens is convex, and the second side surface is concave; a second lens with positive optical power, the second side surface of the second lens is convex; a third lens with optical power; a fourth lens with optical power, the second side surface of the fourth lens is convex; a fifth lens with positive optical power, the first side surface of the fifth lens is convex, and the second side surface is convex.

[0007] Furthermore, the first side surface of the second lens is a plane.

[0008] Furthermore, the first side surface of the second lens is a concave surface.

[0009] Furthermore, the third lens has negative optical power, the first side surface of the third lens is convex, and the second side surface is concave.

[0010] Furthermore, the third lens has negative optical power, the first side surface of the third lens is a concave surface, and the second side surface is a concave surface.

[0011] Furthermore, the third lens has positive power, the first side surface of the third lens is a convex surface, and the second side surface is a convex surface.

[0012] Furthermore, the fourth lens has positive optical power, and the first side surface of the fourth lens is a convex surface.

[0013] Furthermore, the fourth lens has negative optical power, and the first side surface of the fourth lens is a concave surface.

[0014] Furthermore, the third lens and the fourth lens are cemented together to form a doublet lens.

[0015] Furthermore, the optical lens also includes a stop, and the stop is arranged between the second lens and the third lens.

[0016] Furthermore, the first lens is an aspherical lens.

[0017] Furthermore, the total optical length of the optical lens, that is, the center distance TTL from the center of the first side of the first lens to the imaging surface and the entire focal length value F of the optical lens satisfy: TTL / F≤6.

[0018] Furthermore, the focal length value F2 of the second lens element and the focal length value F of the entire optical lens group satisfy: F2 / F≥0.8.

[0019] Furthermore, the entire focal length value F of the optical lens and the curvature radius R3 of the first side surface of the second lens satisfy: F / R3≤0.005.

[0020] Furthermore, the back focus of the optical lens, i.e., the center distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging plane, and the total optical length of the optical lens, i.e., the center distance TTL from the center of the first side of the first lens to the center of the imaging plane, satisfy: BFL / TTL≥0.1.

[0021] Furthermore, the entire focal length value F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: F / ENPD≤3.

[0022] Furthermore, an edge slope K(S1) of the first side surface of the first lens at a maximum field angle satisfies: arctan(1 / K(S1))≤20.

[0023] Furthermore, the total optical length of the optical lens, that is, the center distance TTL from the center of the first side of the first lens to the imaging surface, the actual image height H corresponding to the maximum field of view of the optical lens and the maximum field of view FOV of the optical lens satisfy: TTL / H / FOV≤0.05.

[0024] Furthermore, the total optical length of the optical lens, that is, the distance TTL from the center of the first side of the first lens to the center of the imaging surface and the curvature radius R3 of the first side surface of the second lens satisfy: TTL / R3≤0.005.

[0025] Furthermore, the entire focal length value F of the optical lens and the actual image height H corresponding to the maximum field angle of the optical lens satisfy: 0.2≤F / H≤1.5.

[0026] Furthermore, the maximum field of view FOV of the optical lens, the entire focal length value F of the optical lens and the actual image height H corresponding to the maximum field of view of the optical lens satisfy: FOV*F / H≥50.

[0027] Furthermore, the distance d8 between the fourth lens and the fifth lens and the total optical length of the optical lens, that is, the distance TTL from the center of the first side of the first lens to the center of the imaging surface, satisfy: d8 / TTL≤0.1.

[0028] Furthermore, the focal length value F1 of the first lens and the focal length value F2 of the second lens satisfy: |F1 / F2|≤5.

[0029] 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|≥0.01.

[0030] Furthermore, a curvature radius R1 of the first side surface of the first lens and a curvature radius R2 of the second side surface of the first lens satisfy: 0.5≤R1 / R2≤5.

[0031] Furthermore, a curvature radius R1 of the first side surface of the first lens and a focal length value F of the entire optical lens group satisfy: R1 / F≤5.

[0032] Furthermore, the maximum light clearance diameter D10 of the second side surface of the fifth lens and the actual image height H corresponding to the maximum field angle of the optical lens satisfy: 0.5≤D10 / H≤2.

[0033] Furthermore, the total optical length of the optical lens, that is, the center distance TTL from the center of the first side of the first lens to the imaging surface and the maximum aperture DMAX of the optical lens satisfy: TTL / DMAX≤5.

[0034] Furthermore, a clear aperture D1 of the first side surface of the first lens and a vector height SAG1 of the first side surface of the first lens satisfy: arctan(D1 / SAG1)≥0.8.

[0035] Furthermore, the combined focal length F34 of the third lens and the fourth lens satisfies the following relationship with the entire focal length F of the optical lens: F34 / F≤12.

[0036] Further, the focal length F3 of the third lens element and the focal length F4 of the fourth lens element satisfy: -6≤F3 / F4≤-0.001.

[0037] According to another aspect of the present invention, an optical lens is provided, comprising, from the first side to the second side, in sequence: a first lens with negative optical power; a second lens with positive optical power; a third lens with optical power; a fourth lens with optical power; and a fifth lens with positive optical power; wherein the total optical length of the optical lens, i.e., the center distance TTL from the center of the first side of the first lens to the center of the imaging plane, satisfies the following relationship with the entire group focal length value F of the optical lens: TTL / F≤6.

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

[0039] Furthermore, the first side surface of the second lens is a plane, 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 convex surface.

[0041] Furthermore, the third lens has negative optical power, the first side surface of the third lens is convex, and the second side surface is concave.

[0042] Furthermore, the third lens has negative optical power, the first side surface of the third lens is a concave surface, and the second side surface is a concave surface.

[0043] Furthermore, the third lens has positive power, the first side surface of the third lens is a convex surface, and the second side surface is a convex surface.

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

[0045] Furthermore, the fourth lens has negative optical power, the first side surface of the fourth lens is a concave surface, and the second side surface is a convex surface.

[0046] Furthermore, the first side surface of the fifth lens is a convex surface, and the second side surface is a convex surface.

[0047] Furthermore, the third lens and the fourth lens are cemented together to form a doublet lens.

[0048] Furthermore, the optical lens also includes a stop, and the stop is arranged between the second lens and the third lens.

[0049] Furthermore, the first lens is an aspherical lens.

[0050] Furthermore, the focal length value F2 of the second lens element and the focal length value F of the entire optical lens group satisfy: F2 / F≥0.8.

[0051] Furthermore, the entire focal length value F of the optical lens and the curvature radius R3 of the first side surface of the second lens satisfy: F / R3≤0.005.

[0052] Furthermore, the back focus of the optical lens, i.e., the center distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging plane, and the total optical length of the optical lens, i.e., the center distance TTL from the center of the first side of the first lens to the center of the imaging plane, satisfy: BFL / TTL≥0.1.

[0053] Furthermore, the entire focal length value F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: F / ENPD≤3.

[0054] Furthermore, the edge slope K(S1) of the first side surface of the first lens at the maximum field angle satisfies: arctan(1 / K(S1))≤20. .

[0055] Furthermore, the total optical length of the optical lens, that is, the center distance TTL from the center of the first side of the first lens to the imaging surface, the actual image height H corresponding to the maximum field of view of the optical lens and the maximum field of view FOV of the optical lens satisfy: TTL / H / FOV≤0.05.

[0056] Furthermore, the total optical length of the optical lens, that is, the distance TTL from the center of the first side of the first lens to the center of the imaging surface and the curvature radius R3 of the first side surface of the second lens satisfy: TTL / R3≤0.005.

[0057] Furthermore, the entire focal length value F of the optical lens and the actual image height H corresponding to the maximum field angle of the optical lens satisfy: 0.2≤F / H≤1.5.

[0058] Furthermore, the maximum field of view FOV of the optical lens, the entire focal length value F of the optical lens and the actual image height H corresponding to the maximum field of view of the optical lens satisfy: FOV*F / H≥50.

[0059] Furthermore, the distance d8 between the fourth lens and the fifth lens and the total optical length of the optical lens, that is, the distance TTL from the center of the first side of the first lens to the center of the imaging surface, satisfy: d8 / TTL≤0.1.

[0060] Furthermore, the focal length value F1 of the first lens and the focal length value F2 of the second lens satisfy: |F1 / F2|≤5.

[0061] 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|≥0.01.

[0062] Furthermore, a curvature radius R1 of the first side surface of the first lens and a curvature radius R2 of the second side surface of the first lens satisfy: 0.5≤R1 / R2≤5.

[0063] Furthermore, a curvature radius R1 of the first side surface of the first lens and a focal length value F of the entire optical lens group satisfy: R1 / F≤5.

[0064] Furthermore, the maximum light clearance diameter D10 of the second side surface of the fifth lens and the actual image height H corresponding to the maximum field angle of the optical lens satisfy: 0.5≤D10 / H≤2.

[0065] Furthermore, the total optical length of the optical lens, that is, the center distance TTL from the center of the first side of the first lens to the imaging surface and the maximum aperture DMAX of the optical lens satisfy: TTL / DMAX≤5.

[0066] Furthermore, a clear aperture D1 of the first side surface of the first lens and a vector height SAG1 of the first side surface of the first lens satisfy: arctan(D1 / SAG1)≥0.8.

[0067] Furthermore, the combined focal length F34 of the third lens and the fourth lens satisfies the following relationship with the entire focal length F of the optical lens: F34 / F≤12.

[0068] Further, the focal length F3 of the third lens element and the focal length F4 of the fourth lens element satisfy: -6≤F3 / F4≤-0.001.

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

[0071] The first lens has negative focal length, the first side of the first lens is convex, and the second side is concave. The first lens has negative focal length, which has a divergent effect on the light passing through it, and makes the outgoing light show an upward trend. Under the same field of view angle, the light emitted through the second side of the first lens can make the subsequent optical system have a larger light receiving surface, which is beneficial to the expansion of the image surface on the one hand; on the other hand, it can realize the increase of the physical aperture of the aperture, the aperture becomes larger, and a larger amount of light can be achieved, which increases the brightness of the image surface. The first lens is preferably aspherical, wherein the center R value of the first side of the first lens is small, which can meet the requirements of large central angular resolution, and at the same time, the edge is relatively flat and the R value is large, which can meet the requirements of special distortion (large distortion).

[0072] The second lens has positive focal length, the first side of the second lens is a plane or a concave surface, and the second side of the second lens is a convex surface. When the first side of the second lens is a plane, it is matched with positive focal length and the second side is a gentle convex surface, so that the light emitted through the second lens can still maintain an upward trend, which helps to increase the physical aperture of the aperture, achieve a larger amount of light entering, improve the brightness of the image plane, and at the same time is conducive to miniaturization of the optical lens; in addition, the first side of the second lens is a plane, which is easier to process and the coating layer is more uniform, which is conducive to improving ghost images. When the first side of the second lens is a concave surface, it is matched with positive focal length and the second side is a gentle convex surface, which is conducive to converging the light behind the first lens. At the same time, the concave surface of the first side of the second lens cooperates with the concave surface of the second side of the first lens to reduce the front port diameter of the optical lens and reduce the volume, which is conducive to miniaturization and cost reduction.

[0073] The third lens has positive or negative focal power. When the third lens has negative focal power, it can make the light emitted from the front lens transition smoothly. When the third lens has positive focal power, it is conducive to the convergence of light.

[0074] The fourth lens has positive or negative focal power, the first side of the fourth lens can be convex or concave, and the second side of the fourth lens is convex. When the fourth lens has positive focal power and the first side of the fourth lens is convex, the positive lens converges light, and the flat lens shape allows the light to pass smoothly, reducing the light energy loss at the interface; in conjunction with the third lens with negative focal power in front, it can effectively correct aberrations and improve image quality. Materials with low refractive index and large Abbe number are preferred. When the fourth lens has negative focal power and the first side of the fourth lens is concave, the negative lens forms a meniscus shape, and two positive lenses are connected to the front side of the fourth lens. While changing the light trend, it also brings about larger aberrations accordingly. Using a fourth lens with negative focal power and controlling the focal length of the fourth lens can achieve appropriate divergence of light, effectively correct various aberrations brought by the positive lens in front, and improve image quality. Materials with low refractive index and large Abbe number are preferred.

[0075] The fifth lens has positive focal power, and the first side surface of the fifth lens is convex, and the second side surface is convex, which can realize light convergence, thereby controlling the aperture of the rear lens and realizing miniaturization.

[0076] The present application adopts five lenses, and by optimizing the optical focal length and surface shape of each lens, the optical lens of the present invention has at least one beneficial effect of miniaturization, high resolution, low cost, long back focus and good temperature performance. 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 2 A 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 of the structure of the optical lens of Example 8 of the present invention is shown.

[0086] The above drawings include the following reference numerals:

[0087] L1, first lens; S1, first side surface of the first lens; S2, second side surface of the first lens; L2, second lens; S3, first side surface of the second lens; S4, second side surface of the second lens; STO, aperture; L3, third lens; S6, first side surface of the third lens; S7, second side surface of the third lens; L4, fourth lens; S7, first side surface of the fourth lens; S8, second side surface of the fourth lens; L5, fifth lens; S9, first side surface of the fifth lens; S10, second side surface of the fifth lens; L6, color filter; S11, first side surface of the color filter; S12, second side surface of the color filter; S13, first side surface of the protective glass; S14, second side surface of the protective glass; IMA, imaging surface. 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 that miniaturization, high resolution, low cost, long back focus and good temperature performance are difficult to be achieved simultaneously in the optical lens in the prior art, the present invention provides an optical lens and an electronic device.

[0098] Embodiment 1

[0099] like Figures 1 to 8 As shown, the optical lens includes, from the first side to the second side, a first lens with negative optical power, a second lens with positive optical power, a third lens with optical power, a fourth lens with optical power and a fifth lens with positive optical power, wherein the first side surface of the first lens is convex, and the second side surface is concave; the second side surface of the second lens is convex; the second side surface of the fourth lens is convex; the first side surface of the fifth lens is convex, and the second side surface is convex.

[0100] The first lens has negative focal length, the first side of the first lens is convex, and the second side is concave. The first lens has negative focal length, which has a divergent effect on the light passing through it, and makes the outgoing light show an upward trend. Under the same field of view angle, the light emitted through the second side of the first lens can make the subsequent optical system have a larger light receiving surface, which is beneficial to the expansion of the image surface on the one hand; on the other hand, it can realize the increase of the physical aperture of the aperture, the aperture becomes larger, and a larger amount of light can be achieved, which increases the brightness of the image surface. The first lens is preferably aspherical, wherein the center R value of the first side of the first lens is small, which can meet the requirements of large central angular resolution, and at the same time, the edge is relatively flat and the R value is large, which can meet the requirements of special distortion (large distortion).

[0101] The second lens has positive focal length, the first side of the second lens is a plane or a concave surface, and the second side of the second lens is a convex surface. When the first side of the second lens is a plane, it is matched with positive focal length and the second side is a gentle convex surface, so that the light emitted through the second lens can still maintain an upward trend, which helps to increase the physical aperture of the aperture, achieve a larger amount of light entering, improve the brightness of the image plane, and at the same time is conducive to miniaturization of the optical lens; in addition, the first side of the second lens is a plane, which is easier to process and the coating layer is more uniform, which is conducive to improving ghost images. When the first side of the second lens is a concave surface, it is matched with positive focal length and the second side is a gentle convex surface, which is conducive to converging the light behind the first lens. At the same time, the concave surface of the first side of the second lens cooperates with the concave surface of the second side of the first lens to reduce the front port diameter of the optical lens and reduce the volume, which is conducive to miniaturization and cost reduction.

[0102] The third lens has positive or negative focal power. When the third lens has negative focal power, it can make the light emitted from the front lens transition smoothly. When the third lens has positive focal power, it is conducive to the convergence of light.

[0103] The fourth lens has positive or negative focal power, the first side of the fourth lens can be convex or concave, and the second side of the fourth lens is convex. When the fourth lens has positive focal power and the first side of the fourth lens is convex, the positive lens converges light, and the flat lens shape allows the light to pass smoothly, reducing the light energy loss at the interface; in conjunction with the third lens with negative focal power in front, it can effectively correct aberrations and improve image quality. Materials with low refractive index and large Abbe number are preferred. When the fourth lens has negative focal power and the first side of the fourth lens is concave, the negative lens forms a meniscus shape, and two positive lenses are connected to the front side of the fourth lens. While changing the light trend, it also brings about larger aberrations accordingly. Using a fourth lens with negative focal power and controlling the focal length of the fourth lens can achieve appropriate divergence of light, effectively correct various aberrations brought by the positive lens in front, and improve image quality. Materials with low refractive index and large Abbe number are preferred.

[0104] The fifth lens has positive focal power, and the first side surface of the fifth lens is convex, and the second side surface is convex, which can realize light convergence, thereby controlling the aperture of the rear lens and realizing miniaturization.

[0105] The present application adopts five lenses, and by optimizing the optical focal length and surface shape of each lens, the optical lens of the present invention has at least one beneficial effect of miniaturization, high resolution, low cost, long back focus and good temperature performance.

[0106] In this embodiment, the first side surface of the second lens is a plane. With positive focal power and a second side surface that is a gentle convex surface, the light emitted through the second lens can still maintain an upward trend, which helps to increase the physical aperture of the aperture, achieve a larger amount of light entering, improve the brightness of the image plane, and is also conducive to miniaturization of the optical lens; in addition, the first side surface of the second lens is a plane, which is easier to process and the coating layer is more uniform, which is conducive to improving ghost images.

[0107] In this embodiment, the first side surface of the second lens is a concave surface. With the positive focal power and the gentle convex surface of the second side surface, it is beneficial to converge the light behind the first lens. At the same time, the concave surface of the first side surface of the second lens cooperates with the concave surface of the second side surface of the first lens to achieve a reduced diameter of the front port of the optical lens and reduce the volume, which is beneficial to miniaturization and cost reduction. In this embodiment, the third lens has a negative focal power, and the first side surface of the third lens is a convex surface, and the second side surface is a concave surface. The third lens is a negative lens in a double-cemented lens, the first side surface is a gentle convex surface, and the second side surface is a relatively gentle concave surface, which diverges light and allows the light to pass smoothly; its material is a glass material with a high refractive index and a small Abbe number, which can cooperate with the rear lens to achieve a long back focus and correct system chromatic aberration at the same time.

[0108] In this embodiment, the third lens has negative optical power, the first side surface of the third lens is concave, and the second side surface is concave. The third lens is a negative lens in a double cemented lens, and its shape is double concave and relatively gentle, which can make the light emitted from the front lens transition smoothly and reduce the degree of deflection; its material is a glass material with a high refractive index and a small Abbe number, which can cooperate with the rear lens to achieve a long back focus and correct the system chromatic aberration at the same time.

[0109] In this embodiment, the third lens has positive focal power, the first side surface of the third lens is convex, and the second side surface is convex. The third lens is a positive lens in a double cemented lens, which can converge light, and the double-sided shape is a relatively gentle convex surface, which can reduce light deflection; its material is a glass material with a high refractive index and a small Abbe number, which can cooperate with the rear lens to achieve a long back focus and correct system chromatic aberration.

[0110] In this embodiment, the fourth lens has positive focal length, and the first side surface of the fourth lens is convex. The positive lens converges light, and the flat lens shape allows the light to pass smoothly, reducing the light energy loss at the interface; when combined with the third lens with negative focal length in front, it can effectively correct aberrations and improve image quality. Materials with low refractive index and large Abbe number are preferred.

[0111] In this embodiment, the fourth lens has negative focal length, and the first side surface of the fourth lens is concave. The negative lens is formed in a meniscus shape, and two lenses with positive focal length are connected to the front side of the fourth lens. While changing the light trend, it also brings about relatively large aberrations. Using the fourth lens with negative focal length and controlling the focal length of the fourth lens can achieve proper divergence of the light, effectively correct various aberrations brought by the positive lens in front, and improve the image quality. Materials with low refractive index and large Abbe number are preferably used.

[0112] In this embodiment, the third lens and the fourth lens are glued to form a double glued lens. The third lens and the fourth lens are glued to make the light smoothly transition to the rear lens. This setting can reduce the air gap between the two lenses, making the optical system compact as a whole; at the same time, it can reduce the assembly components between the third lens and the fourth lens, reduce the process, and reduce the cost; it can also reduce the tolerance sensitivity problems such as tilt / eccentricity caused by the lens unit during the assembly process; reduce the light loss caused by reflection between lenses, and improve the illumination; it can also eliminate chromatic aberration, and can also leave some chromatic aberration to balance the chromatic aberration of the system. Under the premise of compact structure, it is beneficial to the resolution, optimize the improvement of optical performance such as distortion and CRA, and can reduce ghost images to a certain extent. At the same time, the double glued lens shares the overall chromatic aberration correction of the system, effectively corrects the aberration to improve the resolution, and makes the optical system compact as a whole to meet the requirements of miniaturization.

[0113] In this embodiment, the optical lens further includes a stop, which is arranged between the second lens and the third lens. This arrangement is conducive to the effective convergence of light entering the optical system, reducing the lens aperture at the rear end of the optical system, and reducing the assembly sensitivity of the system.

[0114] In this embodiment, the first lens is an aspherical lens. The center R value of the first side surface of the first lens is small, which can meet the requirements of large central angular resolution, and the edge is relatively flat and has a large R value, which can meet the requirements of special distortion (large distortion), improve resolution, and improve field curvature and astigmatism.

[0115] In this embodiment, the total optical length of the optical lens, that is, the distance TTL from the center of the first side of the first lens to the center of the imaging surface, and the focal length value F of the entire group of the optical lens satisfy: TTL / F≤6. When the focal length is constant, the length of the optical lens can be effectively limited, which is conducive to miniaturization of the optical lens. Preferably, TTL / F≤5.5.

[0116] 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≥0.8. Reasonable design of the focal length of the second lens can effectively converge light, facilitate miniaturization, and ensure that light is transmitted and facilitate resolution. Preferably, F2 / F≥1.5.

[0117] In this embodiment, the focal length value F of the entire optical lens and the curvature radius R3 of the first side surface of the second lens satisfy: F / R3≤0.005. The first side surface of the second lens is a plane spherical surface or a concave spherical surface, which can effectively ensure that light converges and passes through, thereby improving the resolution. Preferably, F / R3≤0.0001.

[0118] In this embodiment, the back focus of the optical lens, i.e., the center distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging plane, and the total optical length of the optical lens, i.e., the center distance TTL from the center of the first side of the first lens to the center of the imaging plane, satisfy the following relationship: BFL / TTL≥0.1. By constraining this conditional expression, the special requirements for the back focus of the optical lens are met, and space can also be reserved for the installation and focusing of optical elements to avoid interference with the mechanism. Preferably, BFL / TTL≥0.15.

[0119] In this embodiment, the focal length value F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: F / ENPD≤3. Satisfying this conditional expression ensures a relatively large relative aperture, which is beneficial to increase the amount of light entering, collect more light to the imaging surface, and improve the illumination of the image surface and the imaging quality. Preferably, F / ENPD≤2.5.

[0120] In this embodiment, the edge slope K(S1) of the first side surface of the first lens at the maximum field angle satisfies: arctan(1 / K(S1))≤20. The first lens is an aspherical lens, and the opening angle of the first side surface of the first lens is controlled to make the edge relatively smooth, so that more light is gathered at the edge, which can meet the requirements of special distortion (large distortion) and improve the angular resolution of the central field of view. Preferably, arctan(1 / K(S1))≤15.

[0121] In this embodiment, the total optical length of the optical lens, that is, the center distance TTL from the center of the first side of the first lens to the center of the imaging surface, the actual image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following relationship: TTL / H / FOV≤0.05. In the case of the same image height and the same field of view, the length of the optical lens can be effectively limited, which is conducive to the miniaturization of the optical lens. Preferably, TTL / H / FOV≤0.045.

[0122] In this embodiment, the total optical length of the optical lens, that is, the distance TTL from the center of the first side of the first lens to the center of the imaging surface, and the curvature radius R3 of the first side surface of the second lens satisfy: TTL / R3≤0.005. Reasonable control of the curvature radius of the first side surface of the second lens can change the reflection path of the ghost image and reduce the ghost image. Preferably, TTL / R3≤0.0001.

[0123] In this embodiment, the focal length value F of the optical lens and the actual image height H corresponding to the maximum field angle of the optical lens satisfy: 0.2≤F / H≤1.5. Controlling the focal length and image height within a certain range is conducive to improving the resolution. Preferably, 0.5≤F / H≤1.

[0124] 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 actual image height H corresponding to the maximum field of view of the optical lens satisfy: FOV*F / H≥50. This conditional expression is satisfied, and both telephoto and large field of view are satisfied; it helps the entire optical lens to take into account the large field of view and achieve a large central angle resolution. Preferably, FOV*F / H≥55.

[0125] In this embodiment, the distance d8 between the fourth lens and the fifth lens and the total optical length of the optical lens, that is, the distance TTL from the center of the first side of the first lens to the center of the imaging surface, satisfy: d8 / TTL≤0.1. The smaller distance between the fourth lens and the fifth lens is conducive to smooth transition of light and improved image quality. Preferably, d8 / TTL≤0.06.

[0126] In this embodiment, the focal length value F1 of the first lens and the focal length value F2 of the second lens satisfy: |F1 / F2|≤5. Reasonable matching of the focal lengths of the first lens and the second lens can make the light pass smoothly and effectively intercept the edge light, correct the aberration and reduce the system sensitivity. Preferably, |F1 / F2|≤2.

[0127] 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|≥0.01. The special shape of the second lens is conducive to the smooth transition of light trends, reducing system sensitivity and improving resolution. Preferably, |R3 / R4|≥0.5.

[0128] In this embodiment, the curvature radius R1 of the first side surface of the first lens and the curvature radius R2 of the second side surface of the first lens satisfy: 0.5≤R1 / R2≤5. Reasonable distribution of the curvature radius of the first lens can effectively diverge light and achieve special distortion. Preferably, 1.2≤R1 / R2≤3.5.

[0129] In this embodiment, the radius of curvature R1 of the first side surface of the first lens satisfies the following relationship with the focal length F of the entire optical lens set: R1 / F≤5. The first side surface of the first lens is a convex aspherical surface, which is conducive to achieving a large field of view angle, while controlling the curvature of the first side surface to achieve a large central angular resolution and large distortion. Preferably, R1 / F≤3.

[0130] In this embodiment, the maximum aperture D10 of the second side surface of the fifth lens and the actual image height H corresponding to the maximum field angle of the optical lens satisfy the following relationship: 0.5≤D10 / H≤2. This conditional expression is constrained to ensure that the aperture of the last lens is close to the actual image height, and the vertical axis distance from the light exit point to the image point is small, which can reduce the chief ray angle of the incident imaging surface and adapt to most chips. Preferably, 0.8≤D10 / H≤1.5.

[0131] In this embodiment, the total optical length of the optical lens, that is, the center distance TTL from the center of the first side of the first lens to the center of the imaging surface, and the maximum aperture DMAX of the optical lens satisfy: TTL / DMAX≤5. The smaller TTL / DMAX is, the more compact and smaller the entire optical system is. Preferably, TTL / DMAX≤3.5.

[0132] In this embodiment, the clear aperture D1 of the first side surface of the first lens and the vector height SAG1 of the first side surface of the first lens satisfy: arctan(D1 / SAG1)≥0.8. The vector height and the aperture of the first side surface of the first lens are reasonably controlled so that the opening angle of the first lens is small and the edge of the lens is smooth, which can meet the special requirements of large distortion and achieve a large angular resolution of the central field of view. Preferably, arctan(D1 / SAG1)≥1.3.

[0133] In this embodiment, the combined focal length F34 of the third lens and the fourth lens satisfies the following relationship with the focal length F of the entire optical lens group: F34 / F≤12. Constraining F34 is conducive to reasonably allocating focal lengths, achieving thermal compensation, and obtaining good temperature performance. Preferably, F34 / F≤8.

[0134] In this embodiment, the focal length value F3 of the third lens and the focal length value F4 of the fourth lens satisfy: -6≤F3 / F4≤-0.001. By constraining this conditional expression, the focal lengths of the two lenses of the double cemented lens are similar, the degree of light deflection is small, and the light can be smoothly transitioned while eliminating chromatic aberration, while reducing the rear port diameter and total length, and improving the imaging quality. Preferably, -3≤F3 / F4≤-0.05.

[0135] Embodiment 2

[0136] like Figures 1 to 8As shown, the optical lens includes, from the first side to the second side, a first lens with negative optical power; a second lens with positive optical power; a third lens with optical power; a fourth lens with optical power; and a fifth lens with positive optical power; wherein the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens to the center of the imaging surface and the focal length value F of the entire group of the optical lens satisfy: TTL / F≤6. When the focal length is constant, the length of the optical lens can be effectively limited, which is conducive to the miniaturization of the optical lens. Preferably, TTL / F≤5.5.

[0137] In this embodiment, the first side surface of the first lens is convex, and the second side surface is concave. The first lens has a negative optical focal length, which has a divergent effect on the light passing through it, and makes the emitted light present an upward trend. Under the same field of view angle, the light emitted through the second side surface of the first lens can make the subsequent optical system have a larger light receiving surface, which is beneficial to the expansion of the image surface on the one hand; on the other hand, it can realize the increase of the physical aperture of the diaphragm, the aperture becomes larger, and a larger amount of light can be achieved, which increases the brightness of the image surface. The first lens is preferably an aspherical surface, wherein the center R value of the first side surface of the first lens is small, which can meet the requirements of large central angular resolution, and at the same time, the edge is relatively flat and the R value is large, which can meet the requirements of special distortion (large distortion).

[0138] In this embodiment, the first side surface of the second lens is a plane, and the second side surface is a convex surface. When the first side surface of the second lens is a plane, with positive focal length and the second side surface being a gentle convex surface, the light emitted through the second lens can still maintain an upward trend, which helps to increase the physical aperture of the aperture, achieve a larger amount of light entering, improve the brightness of the image plane, and at the same time help to achieve miniaturization of the optical lens; in addition, the first side surface of the second lens is a plane, which is easier to process and the coating layer is more uniform, which is conducive to improving ghost images.

[0139] In this embodiment, the first side surface of the second lens is a concave surface, and the second side surface is a convex surface. When the first side surface of the second lens is a concave surface, it is helpful to converge the light behind the first lens with a positive focal length and a gently convex surface of the second side surface. At the same time, the concave surface of the first side surface of the second lens cooperates with the concave surface of the second side surface of the first lens to reduce the diameter of the front end of the optical lens, reduce the volume, and facilitate miniaturization and cost reduction.

[0140] In this embodiment, the third lens has negative optical power, the first side surface of the third lens is convex, and the second side surface is concave. The third lens is a negative lens in a double cemented lens, the first side surface is a gentle convex surface, and the second side surface is a relatively gentle concave surface, which diverges light and allows the light to pass smoothly; its material is a glass material with a high refractive index and a small Abbe number, which can cooperate with the rear lens to achieve a long back focus and correct system chromatic aberration at the same time.

[0141] In this embodiment, the third lens has negative optical power, the first side surface of the third lens is concave, and the second side surface is concave. The third lens is a negative lens in a double cemented lens, and its shape is double concave and relatively gentle, which can make the light emitted from the front lens transition smoothly and reduce the degree of deflection; its material is a glass material with a high refractive index and a small Abbe number, which can cooperate with the rear lens to achieve a long back focus and correct the system chromatic aberration at the same time.

[0142] In this embodiment, the third lens has positive focal power, the first side surface of the third lens is convex, and the second side surface is convex. The third lens is a positive lens in a double cemented lens, which can converge light, and the double-sided shape is a relatively gentle convex surface, which can reduce light deflection; its material is a glass material with a high refractive index and a small Abbe number, which can cooperate with the rear lens to achieve a long back focus and correct system chromatic aberration.

[0143] In this embodiment, the fourth lens has positive focal length, the first side of the fourth lens is convex, and the second side is convex. The positive lens converges light, and the flat lens shape allows the light to pass smoothly, reducing the light energy loss at the interface; when combined with the third lens with negative focal length in front, it can effectively correct aberrations and improve image quality. Materials with low refractive index and large Abbe number are preferred.

[0144] In this embodiment, the fourth lens has negative focal length, the first side of the fourth lens is concave, and the second side is convex. The negative lens is formed in a meniscus shape, and two lenses with positive focal length are connected to the front side of the fourth lens. While changing the light trend, it also brings about relatively large aberrations. Using the fourth lens with negative focal length and controlling the focal length of the fourth lens can achieve proper divergence of the light, effectively correct various aberrations brought by the positive lens in front, and improve the image quality. Materials with low refractive index and large Abbe number are preferred.

[0145] In this embodiment, the first side surface of the fifth lens is a convex surface, and the second side surface is a convex surface. The fifth lens has positive optical power, and the first side surface of the fifth lens is a convex surface, and the second side surface is a convex surface. Light convergence can be achieved, thereby controlling the aperture of the rear lens and achieving miniaturization.

[0146] The present application adopts five lenses, and by optimizing the optical focal length and surface shape of each lens, the optical lens of the present invention has at least one beneficial effect of miniaturization, high resolution, low cost, long back focus and good temperature performance.

[0147] In this embodiment, the third lens and the fourth lens are glued to form a double glued lens. The third lens and the fourth lens are glued to make the light smoothly transition to the rear lens. This setting can reduce the air gap between the two lenses, making the optical system compact as a whole; at the same time, it can reduce the assembly components between the third lens and the fourth lens, reduce the process, and reduce the cost; it can also reduce the tolerance sensitivity problems such as tilt / eccentricity caused by the lens unit during the assembly process; reduce the light loss caused by reflection between lenses, and improve the illumination; it can also eliminate chromatic aberration, and can also leave some chromatic aberration to balance the chromatic aberration of the system. Under the premise of compact structure, it is beneficial to the resolution, optimize the improvement of optical performance such as distortion and CRA, and can reduce ghost images to a certain extent. At the same time, the double glued lens shares the overall chromatic aberration correction of the system, effectively corrects the aberration to improve the resolution, and makes the optical system compact as a whole to meet the requirements of miniaturization.

[0148] In this embodiment, the optical lens further includes a stop, which is arranged between the second lens and the third lens. This arrangement is conducive to the effective convergence of light entering the optical system, reducing the lens aperture at the rear end of the optical system, and reducing the assembly sensitivity of the system.

[0149] In this embodiment, the first lens is an aspherical lens. The center R value of the first side surface of the first lens is small, which can meet the requirements of large central angular resolution, and the edge is relatively flat and has a large R value, which can meet the requirements of special distortion (large distortion), improve resolution, and improve field curvature and astigmatism.

[0150] 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≥0.8. Reasonable design of the focal length of the second lens can effectively converge light, facilitate miniaturization, and ensure that light is transmitted and facilitate resolution. Preferably, F2 / F≥1.5.

[0151] In this embodiment, the focal length value F of the entire optical lens and the curvature radius R3 of the first side surface of the second lens satisfy: F / R3≤0.005. The first side surface of the second lens is a plane spherical surface or a concave spherical surface, which can effectively ensure that light converges and passes through, thereby improving the resolution. Preferably, F / R3≤0.0001.

[0152] In this embodiment, the back focus of the optical lens, i.e., the center distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging plane, and the total optical length of the optical lens, i.e., the center distance TTL from the center of the first side of the first lens to the center of the imaging plane, satisfy the following relationship: BFL / TTL≥0.1. By constraining this conditional expression, the special requirements for the back focus of the optical lens are met, and space can also be reserved for the installation and focusing of optical elements to avoid interference with the mechanism. Preferably, BFL / TTL≥0.15.

[0153] In this embodiment, the focal length value F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: F / ENPD≤3. Satisfying this conditional expression ensures a relatively large relative aperture, which is beneficial to increase the amount of light entering, collect more light to the imaging surface, and improve the illumination of the image surface and the imaging quality. Preferably, F / ENPD≤2.5.

[0154] In this embodiment, the edge slope K(S1) of the first side surface of the first lens at the maximum field angle satisfies: arctan(1 / K(S1))≤20. The first lens is an aspherical lens, and the opening angle of the first side surface of the first lens is controlled to make the edge relatively smooth, so that more light is gathered at the edge, which can meet the requirements of special distortion (large distortion) and improve the angular resolution of the central field of view. Preferably, arctan(1 / K(S1))≤15.

[0155] In this embodiment, the total optical length of the optical lens, that is, the center distance TTL from the center of the first side of the first lens to the center of the imaging surface, the actual image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following relationship: TTL / H / FOV≤0.05. In the case of the same image height and the same field of view, the length of the optical lens can be effectively limited, which is conducive to the miniaturization of the optical lens. Preferably, TTL / H / FOV≤0.045.

[0156] In this embodiment, the total optical length of the optical lens, that is, the center distance TTL from the center of the first side of the first lens to the imaging surface, and the curvature radius R3 of the first side of the second lens satisfy: TTL / R3≤0.005. Reasonable constraints on the curvature radius of the first side of the second lens can change the reflection path of the ghost image and reduce the ghost image. Preferably, TTL / R3≤0.0001.

[0157] In this embodiment, the focal length value F of the optical lens and the actual image height H corresponding to the maximum field angle of the optical lens satisfy: 0.2≤F / H≤1.5. Controlling the focal length and image height within a certain range is conducive to improving the resolution. Preferably, 0.5≤F / H≤1.

[0158] 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 actual image height H corresponding to the maximum field of view of the optical lens satisfy: FOV*F / H≥50. This conditional expression is satisfied, and both telephoto and large field of view are satisfied; it helps the entire optical lens to take into account the large field of view and achieve a large central angle resolution. Preferably, FOV*F / H≥55.

[0159] In this embodiment, the distance d8 between the fourth lens and the fifth lens and the total optical length of the optical lens, that is, the distance TTL from the center of the first side of the first lens to the center of the imaging surface, satisfy: d8 / TTL≤0.1. The smaller distance between the fourth lens and the fifth lens is conducive to smooth transition of light and improved image quality. Preferably, d8 / TTL≤0.06.

[0160] In this embodiment, the focal length value F1 of the first lens and the focal length value F2 of the second lens satisfy: |F1 / F2|≤5. Reasonable matching of the focal lengths of the first lens and the second lens can make the light pass smoothly and effectively intercept the edge light, correct the aberration and reduce the system sensitivity. Preferably, |F1 / F2|≤2.

[0161] 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|≥0.01. The special shape of the second lens is conducive to the smooth transition of light trends, reducing system sensitivity and improving resolution. Preferably, |R3 / R4|≥0.5.

[0162] In this embodiment, the curvature radius R1 of the first side surface of the first lens and the curvature radius R2 of the second side surface of the first lens satisfy: 0.5≤R1 / R2≤5. Reasonable distribution of the curvature radius of the first lens can effectively diverge light and achieve special distortion. Preferably, 1.2≤R1 / R2≤3.5.

[0163] In this embodiment, the radius of curvature R1 of the first side surface of the first lens satisfies the following relationship with the focal length F of the entire optical lens set: R1 / F≤5. The first side surface of the first lens is a convex aspherical surface, which is conducive to achieving a large field of view angle, while controlling the curvature of the first side surface to achieve a large central angular resolution and large distortion. Preferably, R1 / F≤3.

[0164] In this embodiment, the maximum aperture D10 of the second side surface of the fifth lens and the actual image height H corresponding to the maximum field angle of the optical lens satisfy: 0.5≤D10 / H≤2. The aperture of the last lens is close to the actual image height, and the vertical axis distance from the light exit point to the image point is small, which can reduce the chief ray angle of the incident imaging surface and adapt to most chips. Preferably, 0.8≤D10 / H≤1.5.

[0165] In this embodiment, the total optical length of the optical lens, that is, the center distance TTL from the center of the first side of the first lens to the center of the imaging surface, and the maximum aperture DMAX of the optical lens satisfy: TTL / DMAX≤5. The smaller TTL / DMAX is, the more compact and smaller the entire optical system is. Preferably, TTL / DMAX≤3.5.

[0166] In this embodiment, the clear aperture D1 of the first side surface of the first lens and the vector height SAG1 of the first side surface of the first lens satisfy: arctan(D1 / SAG1)≥0.8. The vector height and the aperture of the first side surface of the first lens are reasonably controlled so that the opening angle of the first lens is small and the edge of the lens is smooth, which can meet the special requirements of large distortion and achieve a large angular resolution of the central field of view. Preferably, arctan(D1 / SAG1)≥1.3.

[0167] In this embodiment, the combined focal length F34 of the third lens and the fourth lens satisfies the following relationship with the focal length F of the entire optical lens group: F34 / F≤12. Constraining F34 is conducive to reasonably allocating focal lengths, achieving thermal compensation, and obtaining good temperature performance. Preferably, F34 / F≤8.

[0168] In this embodiment, the focal length value F3 of the third lens and the focal length value F4 of the fourth lens satisfy: -6≤F3 / F4≤-0.001. By constraining this conditional expression, the focal lengths of the two lenses of the double cemented lens are similar, the degree of light deflection is small, and the light can be smoothly transitioned while eliminating chromatic aberration, while reducing the rear port diameter and total length, and improving the imaging quality. Preferably, -3≤F3 / F4≤-0.05.

[0169] 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.

[0170] 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.

[0171] 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.

[0172] 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.

[0173] 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.

[0174] 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.

[0175] It should be noted that any one of the following examples 1 to 8 is applicable to all embodiments of the present application.

[0176] Example 1

[0177] like Figure 1 The figure shows a schematic diagram of the optical lens structure of Example 1.

[0178] like Figure 1As shown, the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5, a color filter L6, a first side surface S13 of the protective glass, a second side surface S14 of the protective glass, and an imaging surface IMA.

[0179] The first lens L1 has negative power, the first side surface S1 of the first lens is convex, and the second side surface S2 of the first lens is concave. The second lens L2 has positive power, the first side surface S3 of the second lens is a plane, and the second side surface S4 of the second lens is convex. The third lens L3 has negative power, the first side surface S6 of the third lens is convex, and the second side surface S7 of the third lens is concave. 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 convex. The color filter L6 has a first side surface S11 of the color filter and a second side surface S12 of the color filter. The light from the first side passes through each surface S1 to S14 in sequence and is finally imaged on the imaging surface IMA. Since the third lens L3 and the fourth lens L4 are bonded to form a double bonded lens, the second side surface S7 of the third lens and the first side surface S7 of the fourth lens are the same surface.

[0180] In this example, the total effective focal length F of the optical lens is 4.255 mm, the maximum field of view FOV of the optical lens is 100.000°, and the total length TTL of the optical lens is 19.702 mm.

[0181] 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).

[0182] Surf Radius Thickness Nd Vd 1 3.320 1.674 1.69 53.19 2 1.503 2.986 3 Infinity 2.951 1.92 20.89 4 -10.061 0.100 STO Infinity 1.046 6 23.002 1.012 1.92 18.90 7 5.325 1.521 1.59 68.34 8 -7.987 0.100 9 9.703 2.746 1.62 63.39 10 -10.048 0.100 11 Infinity 0.500 1.52 64.20 12 Infinity 4.621 13 Infinity 0.300 1.52 64.20 14 Infinity 0.045 IMA / /

[0183] Table 1

[0184] In Example 1, the surface shape of each aspheric lens can be defined by but not limited to the following aspheric formula:

[0185]

[0186] Wherein, x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c=1 / R (i.e., the paraxial curvature c is the reciprocal of the curvature radius R in Table 1 above); k is the cone coefficient; A, B, C, D, E, F, G, and H are all high-order coefficients. Table 2 below shows the cone coefficient k and the high-order coefficients A, B, C, D, E, F, G, and H that can be used for the aspheric lens surfaces S1 and S2 in Example 1.

[0187]

[0188] 1 1.1143E-05 -7.4494E-07 2.2922E-08 -2.6755E-10 2 2.8422E-04 -6.1186E-05 6.1380E-06 -2.5584E-07

[0189] Table 2

[0190] Example 2

[0191] like Figure 2 FIG. 1 is a schematic diagram of the optical lens structure of Example 2. In this example and the following examples, for the sake of brevity, some descriptions similar to Example 1 will be omitted.

[0192] like Figure 2 As shown, the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5, a color filter L6, a first side surface S13 of the protective glass, a second side surface S14 of the protective glass, and an imaging surface IMA.

[0193] The first lens L1 has negative power, the first side surface S1 of the first lens is convex, and the second side surface S2 of the first lens is concave. The second lens L2 has positive power, the first side surface S3 of the second lens is a plane, and the second side surface S4 of the second lens is convex. The third lens L3 has negative power, the first side surface S6 of the third lens is convex, and the second side surface S7 of the third lens is concave. 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 convex. The color filter L6 has a first side surface S11 of the color filter and a second side surface S12 of the color filter. The light from the first side passes through each surface S1 to S14 in sequence and is finally imaged on the imaging surface IMA. Since the third lens L3 and the fourth lens L4 are bonded to form a double bonded lens, the second side surface S7 of the third lens and the first side surface S7 of the fourth lens are the same surface.

[0194] In this example, the total effective focal length F of the optical lens is 4.227 mm, the maximum field of view FOV of the optical lens is 100.000°, and the total length TTL of the optical lens is 19.577 mm.

[0195] Table 3 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).

[0196] Surf Radius Thickness Nd Vd 1 3.320 1.665 1.69 53.19 2 1.503 3.278 3 Infinity 2.553 1.92 20.89 4 -10.061 0.100 STO Infinity 1.046 6 23.002 1.214 1.92 18.90 7 5.325 1.335 1.59 68.34 8 -7.987 0.100 9 9.703 2.721 1.62 63.39 10 -10.048 0.100 11 Infinity 0.500 1.52 64.20 12 Infinity 4.621 13 Infinity 0.300 1.52 64.20 14 Infinity 0.045 IMA / /

[0197] Table 3

[0198] Table 4 below shows the cone coefficient k and the higher-order coefficients A, B, C, D, E, F, G, and H that can be used for the aspheric lens surfaces S1 and S2 in Example 2.

[0199]

[0200] Table 4

[0201] Example 3

[0202] like Figure 3 The figure shows a schematic diagram of the optical lens structure of Example 3.

[0203] like Figure 3 As shown, the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5, a color filter L6, a first side surface S13 of the protective glass, a second side surface S14 of the protective glass, and an imaging surface IMA.

[0204] The first lens L1 has negative power, the first side surface S1 of the first lens is convex, and the second side surface S2 of the first lens is concave. The second lens L2 has positive power, the first side surface S3 of the second lens is concave, and the second side surface S4 of the second lens is convex. The third lens L3 has negative power, the first side surface S6 of the third lens is concave, and the second side surface S7 of the third lens is concave. 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 convex. The color filter L6 has a first side surface S11 of the color filter and a second side surface S12 of the color filter. The light from the first side passes through each surface S1 to S14 in sequence and is finally imaged on the imaging surface IMA. Since the third lens L3 and the fourth lens L4 are bonded to form a double bonded lens, the second side surface S7 of the third lens and the first side surface S7 of the fourth lens are the same surface.

[0205] In this example, the total effective focal length F of the optical lens is 4.408 mm, the maximum field of view FOV of the optical lens is 100.000°, and the total length TTL of the optical lens is 20.629 mm.

[0206] Table 5 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).

[0207]

[0208]

[0209] Table 5

[0210] Table 6 below shows the cone coefficient k and the higher-order coefficients A, B, C, D, E, F, G, and H that can be used for the aspheric lens surfaces S1 and S2 in Example 3.

[0211]

[0212] Table 6

[0213] Example 4

[0214] like Figure 4 The figure shows a schematic diagram of the optical lens structure of Example 4.

[0215] like Figure 4 As shown, the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5, a color filter L6, a first side surface S13 of the protective glass, a second side surface S14 of the protective glass, and an imaging surface IMA.

[0216] The first lens L1 has negative power, the first side surface S1 of the first lens is convex, and the second side surface S2 of the first lens is concave. The second lens L2 has positive power, the first side surface S3 of the second lens is concave, and the second side surface S4 of the second lens is convex. The third lens L3 has negative power, the first side surface S6 of the third lens is concave, and the second side surface S7 of the third lens is concave. 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 convex. The color filter L6 has a first side surface S11 of the color filter and a second side surface S12 of the color filter. The light from the first side passes through each surface S1 to S14 in sequence and is finally imaged on the imaging surface IMA. Since the third lens L3 and the fourth lens L4 are bonded to form a double bonded lens, the second side surface S7 of the third lens and the first side surface S7 of the fourth lens are the same surface.

[0217] In this example, the total effective focal length F of the optical lens is 4.439 mm, the maximum field of view FOV of the optical lens is 100.000°, and the total length TTL of the optical lens is 20.046 mm.

[0218] Table 7 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).

[0219] Surf Radius Thickness Nd Vd 1 3.250 1.981 1.69 53.13 2 1.505 2.896 3 -41.226 1.934 1.92 20.88 4 -7.086 1.107 STO Infinity 0.126 6 -42.070 1.058 1.92 18.90 7 6.660 2.253 1.59 68.34 8 -5.631 0.100 9 7.933 3.877 1.62 63.39 10 -12.513 0.100 11 Infinity 0.500 1.52 64.20 12 Infinity 3.723 13 Infinity 0.300 1.52 64.20 14 Infinity 0.091 IMA / /

[0220] Table 7

[0221] Table 8 below shows the cone coefficient k and the higher-order coefficients A, B, C, D, E, F, G, and H that can be used for the aspheric lens surfaces S1 and S2 in Example 4.

[0222]

[0223] Table 8

[0224] Example 5

[0225] like Figure 5 The figure shows a schematic diagram of the optical lens structure of Example 5.

[0226] like Figure 5 As shown, the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5, a color filter L6, a first side surface S13 of the protective glass, a second side surface S14 of the protective glass, and an imaging surface IMA.

[0227] The first lens L1 has negative power, the first side surface S1 of the first lens is convex, and the second side surface S2 of the first lens is concave. The second lens L2 has positive power, the first side surface S3 of the second lens is concave, and the second side surface S4 of the second lens is convex. The third lens L3 has positive power, the first side surface S6 of the third lens is convex, and the second side surface S7 of the third lens is convex. The fourth lens L4 has negative power, the first side surface S7 of the fourth lens is concave, and the second side surface S8 of the fourth lens is 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 convex. The color filter L6 has a first side surface S11 of the color filter and a second side surface S12 of the color filter. The light from the first side passes through the surfaces S1 to S14 in sequence and is finally imaged on the imaging surface IMA. Since the third lens L3 and the fourth lens L4 are bonded to form a double bonded lens, the second side surface S7 of the third lens and the first side surface S7 of the fourth lens are the same surface.

[0228] In this example, the total effective focal length F of the optical lens is 4.508 mm, the maximum field of view FOV of the optical lens is 100.000°, and the total length TTL of the optical lens is 21.639 mm.

[0229] Table 9 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).

[0230] Surf Radius Thickness Nd Vd 1 3.391 2.185 1.69 53.13 2 1.597 2.282 3 -42.804 3.896 1.92 20.88 4 -10.470 1.062 STO Infinity 0.100 6 30.884 3.443 1.59 68.34 7 -3.164 0.840 1.92 18.90 8 -5.299 0.100 9 12.120 2.299 1.62 63.39 10 -14.353 0.100 11 Infinity 0.500 1.52 64.20 12 Infinity 4.487 13 Infinity 0.300 1.52 64.20 14 Infinity 0.045 IMA / /

[0231] Table 9

[0232] Table 10 below shows the cone coefficient k and the higher-order coefficients A, B, C, D, E, F, G, and H that can be used for the aspheric lens surfaces S1 and S2 in Example 5.

[0233]

[0234] Table 10

[0235] Example 6

[0236] like Figure 6 Shown is a schematic diagram of the optical lens structure of Example 6.

[0237] like Figure 6 As shown, the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5, a color filter L6, a first side surface S13 of the protective glass, a second side surface S14 of the protective glass, and an imaging surface IMA.

[0238] The first lens L1 has negative power, the first side surface S1 of the first lens is convex, and the second side surface S2 of the first lens is concave. The second lens L2 has positive power, the first side surface S3 of the second lens is concave, and the second side surface S4 of the second lens is convex. The third lens L3 has positive power, the first side surface S6 of the third lens is convex, and the second side surface S7 of the third lens is convex. The fourth lens L4 has negative power, the first side surface S7 of the fourth lens is concave, and the second side surface S8 of the fourth lens is 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 convex. The color filter L6 has a first side surface S11 of the color filter and a second side surface S12 of the color filter. The light from the first side passes through the surfaces S1 to S14 in sequence and is finally imaged on the imaging surface IMA. Since the third lens L3 and the fourth lens L4 are bonded to form a double bonded lens, the second side surface S7 of the third lens and the first side surface S7 of the fourth lens are the same surface.

[0239] In this example, the total effective focal length F of the optical lens is 4.509 mm, the maximum field of view FOV of the optical lens is 100.000°, and the total length TTL of the optical lens is 21.641 mm.

[0240] Table 11 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).

[0241] Surf Radius Thickness Nd Vd 1 3.391 2.187 1.69 53.13 2 1.597 2.285 3 -42.804 3.903 1.92 20.88 4 -10.470 1.062 STO Infinity 0.100 6 30.884 3.467 1.59 68.34 7 -3.164 0.840 1.92 18.90 8 -5.299 0.100 9 12.120 2.266 1.62 63.39 10 -14.353 0.100 11 Infinity 0.500 1.52 64.20 12 Infinity 4.487 13 Infinity 0.300 1.52 64.20 14 Infinity 0.045 IMA / /

[0242] Table 11

[0243] Table 12 below shows the cone coefficient k and the higher-order coefficients A, B, C, D, E, F, G, and H that can be used for the aspheric lens surfaces S1 and S2 in Example 6.

[0244]

[0245]

[0246] Table 12

[0247] Example 7

[0248] like Figure 7 The figure shows the schematic diagram of the optical lens structure of Example 7.

[0249] like Figure 7 As shown, the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5, a color filter L6, a first side surface S13 of the protective glass, a second side surface S14 of the protective glass, and an imaging surface IMA.

[0250] The first lens L1 has negative power, the first side surface S1 of the first lens is convex, and the second side surface S2 of the first lens is concave. The second lens L2 has positive power, the first side surface S3 of the second lens is concave, and the second side surface S4 of the second lens is convex. The third lens L3 has negative power, the first side surface S6 of the third lens is convex, and the second side surface S7 of the third lens is concave. 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 convex. The color filter L6 has a first side surface S11 of the color filter and a second side surface S12 of the color filter. The light from the first side passes through the surfaces S1 to S14 in sequence and is finally imaged on the imaging surface IMA. Since the third lens L3 and the fourth lens L4 are bonded to form a double bonded lens, the second side surface S7 of the third lens and the first side surface S7 of the fourth lens are the same surface.

[0251] In this example, the total effective focal length F of the optical lens is 4.487 mm, the maximum field of view FOV of the optical lens is 100.000°, and the total length TTL of the optical lens is 21.552 mm.

[0252] Table 13 shows the basic structural parameter table of the optical lens of Example 7, wherein the units of the radius of curvature and thickness / distance are both millimeters (mm).

[0253]

[0254]

[0255] Table 13

[0256] Table 14 below shows the cone coefficient k and the higher-order coefficients A, B, C, D, E, F, G, and H that can be used for the aspheric lens surfaces S1 and S2 in Example 7.

[0257]

[0258] Table 14

[0259] Example 8

[0260] like Figure 8 Shown is a schematic diagram of the optical lens structure of Example 8.

[0261] like Figure 8 As shown, the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5, a color filter L6, a first side surface S13 of the protective glass, a second side surface S14 of the protective glass, and an imaging surface IMA.

[0262] The first lens L1 has negative power, the first side surface S1 of the first lens is convex, and the second side surface S2 of the first lens is concave. The second lens L2 has positive power, the first side surface S3 of the second lens is concave, and the second side surface S4 of the second lens is convex. The third lens L3 has negative power, the first side surface S6 of the third lens is convex, and the second side surface S7 of the third lens is concave. 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 convex. The color filter L6 has a first side surface S11 of the color filter and a second side surface S12 of the color filter. The light from the first side passes through the surfaces S1 to S14 in sequence and is finally imaged on the imaging surface IMA. Since the third lens L3 and the fourth lens L4 are bonded to form a double bonded lens, the second side surface S7 of the third lens and the first side surface S7 of the fourth lens are the same surface.

[0263] In this example, the total effective focal length F of the optical lens is 4.477 mm, the maximum field of view FOV of the optical lens is 100.000°, and the total length TTL of the optical lens is 21.490 mm.

[0264] Table 15 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).

[0265]

[0266]

[0267] Table 15

[0268] Table 16 below shows the cone coefficient k and the higher-order coefficients A, B, C, D, E, F, G, and H that can be used for the aspheric lens surfaces S1 and S2 in Example 8.

[0269]

[0270] Table 16

[0271] In summary, Examples 1 to 8 respectively satisfy the relationships shown in Table 17.

[0272]

[0273]

[0274] Table 17

[0275] Table 18 gives the effective focal length F of the optical lenses of Examples 1 to 8, the effective focal length F1 to F5 of each lens, etc. (unit: mm).

[0276] Parameters / Examples 1 2 3 4 5 6 7 8 F 4.255 4.227 4.408 4.439 4.508 4.509 4.487 4.477 FNO 1.900 1.888 2.040 2.040 2.040 2.040 2.040 2.040 ENPD 2.239 2.239 2.161 2.176 2.210 2.210 2.199 2.195 TTL 19.702 19.577 20.629 20.046 21.639 21.641 21.552 21.490 FOV 100.000 100.000 100.000 100.000 100.000 100.000 100.000 100.000 H 5.760 5.760 5.760 5.760 5.760 5.760 5.761 5.760 BFL 5.566 5.566 4.714 4.714 5.432 5.432 5.685 5.685 DMAX 7.400 7.400 7.400 7.400 7.483 7.483 7.400 7.400 F1 -6.342 -6.320 -7.763 -7.534 -8.674 -8.683 -7.304 -7.069 F2 10.781 10.781 8.924 8.924 14.036 14.035 12.347 12.352 F3 -7.627 -7.670 -6.057 -6.090 5.013 5.015 -8.464 -8.495 F4 5.610 5.579 5.499 5.506 -10.375 -10.375 5.929 5.933 F5 8.405 8.400 8.410 8.439 10.958 10.952 8.363 8.348 R1 3.320 3.320 3.250 3.250 3.391 3.391 3.344 3.344 R2 1.503 1.503 1.505 1.505 1.597 1.597 1.544 1.544 R3 Infinity Infinity -41.226 -41.226 -42.804 -42.804 -39.254 -39.254 R4 -10.061 -10.061 -7.086 -7.086 -10.470 -10.470 -9.217 -9.217 D10 5.613 5.560 5.972 5.747 5.555 5.562 6.362 6.435 d8 0.100 0.100 0.100 0.100 0.100 0.100 0.100 0.100 F34 18.986 19.077 22.540 22.650 10.891 10.893 18.215 18.224 SAG1 1.102 1.134 1.412 1.263 1.277 1.281 1.048 1.025 D1 7.400 7.400 7.400 7.400 7.483 7.483 7.400 7.400 arctan(1 / K(S1)) 2.787 3.792 12.270 7.001 10.337 10.598 2.740 3.720

[0277] Table 18

[0278] 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.

[0279] 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.

[0280] 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.

[0281] 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 negative optical power, wherein the first side surface of the first lens is convex and the second side surface is concave; a second lens having positive optical power, wherein the second side surface of the second lens is a convex surface; a third lens having optical power; a fourth lens having optical power, wherein the second 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 a convex surface, and the second side surface of the fifth lens is a convex surface.

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

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

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

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

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

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

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

9. The optical lens according to claim 1, characterized in that: The third lens and the fourth lens are cemented together to form a doublet lens.

10. An optical lens, characterized in that: From the first side to the second side, it includes: a first lens having negative optical power; a second lens having positive optical power; a third lens having optical power; a fourth lens having optical power; a fifth lens having positive refractive power; The total optical length of the optical lens, that is, the center distance TTL from the center of the first side of the first lens to the center of the imaging surface and the entire focal length value F of the optical lens satisfy the following relationship: TTL / F≤6.

Images