Optical Lens and Electronic Device

Abstract

The present application discloses an optical lens and an electronic device. The optical lens sequentially includes, along the optical axis, from the first side to the second side: a first lens with a negative optical power, the second side surface of which is concave; a second lens with an optical power, the first side surface of which is concave and the second side surface of which is convex; a third lens with an optical power; a fourth lens with an optical power, the second side surface of the fourth lens being convex; and a fifth lens with a positive optical power; wherein, the number of lenses with optical power in the optical lens is five; the optical lens satisfies: 0.25 ≤ T23 / TL ≤ 0.9; -8 ≤ F1 / F ≤ -0.5; 0.5 ≤ R4 / (R3 - d3) ≤ 1.2.

Description

Technical Field

[0001] The present application relates to the field of optical elements, and more particularly, to an optical lens and an electronic device. Background Art

[0002] In recent years, with the rapid development of automotive assisted driving technology, optical lenses have been increasingly widely used in automobiles, such as vehicle-mounted optical lenses or projection lenses.

[0003] Among them, the projection lens is an important part of a projector and a PGU (Picture Generation Unit). At present, with the rapid development of DMD (Digital Micromirror Device) and LCOS (Liquid Crystal On Silicon) chip technologies, the requirements for projection lenses are also getting higher and higher. In order to meet the increasingly high performance requirements of in-vehicle applications, vehicle-mounted projection lenses are also continuously developing in the directions of small size, small aperture number, large field of view, high resolution, and small telecentricity. Summary of the Invention

[0004] On the one hand, the present application provides an optical lens, which sequentially includes, along the optical axis from the first side to the second side: a first lens with a negative optical power, the second side surface of which is concave; a second lens with an optical power, the first side surface of which is concave and the second side surface of which is convex; a third lens with an optical power; a fourth lens with an optical power, the second side surface of the fourth lens being convex; and a fifth lens with a positive optical power; wherein, the number of lenses with optical power in the optical lens is five; the air interval T23 between the second lens and the third lens on the optical axis and the distance TL from the first side surface of the first lens to the second side surface of the fifth lens on the optical axis satisfy: 0.25 ≤ T23 / TL ≤ 0.9; the focal length F1 of the first lens and the focal length F of the optical lens satisfy: -8 ≤ F1 / F ≤ -0.5; the radius of curvature R3 of the first side surface of the second lens, the radius of curvature R4 of the second side surface of the second lens, and the central thickness d3 of the second lens satisfy: 0.5 ≤ R4 / (R3 - d3) ≤ 1.2.

[0005] In some embodiments, the optical powers of the third lens and the fourth lens are opposite.

[0006] In some embodiments, the first side surface of the first lens is convex or flat.

[0007] In some embodiments, the second lens has a positive optical power or a negative optical power.

[0008] In some embodiments, the third lens has a negative optical power, with its first side being concave and its second side being concave; or its first side being convex and its second side being concave; or its first side being flat and its second side being concave.

[0009] In some embodiments, the third lens has a positive optical power, with its first side being convex and its second side being convex.

[0010] In some embodiments, the fourth lens has a positive optical power, with its first side being convex; or the fourth lens has a negative optical power, with its first side being concave.

[0011] In some embodiments, the first side of the fifth lens is convex and the second side is convex; or its first side is convex and the second side is flat; or its first side is convex and the second side is concave; or its first side is flat and the second side is convex; or its first side is concave and the second side is convex.

[0012] In some embodiments, the maximum field of view FOV of the optical lens, the focal length F of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy: (FOV F) / H≥45°.

[0013] In some embodiments, the optical lens satisfies at least one of the following conditions: TTL / F≤6.5; (F θ) / D≥0.35; D / H / FOV×1°≤0.08; D / H / θ≤5; D / H / F×1mm≤0.2; TTL / H / FOV×1°≤0.8; TTL / H / θ≤25; TTL / DMAX≤6; where TTL is the overall optical length of the optical lens, F is the focal length of the optical lens, θ is the radian value corresponding to the maximum field of view of the optical lens, D is the maximum clear aperture of the first side of the first lens, H is the image height corresponding to the maximum field of view of the optical lens, FOV is the maximum field of view of the optical lens, and DMAX is the maximum value among the maximum clear apertures of the optical surfaces of the first lens to the fifth lens.

[0014] In some embodiments, the back focal length BFL of the optical lens and the overall optical length TTL of the optical lens satisfy: BFL / TTL≥0.3.

[0015] In some embodiments, the focal length F of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy: 1.3≤F / H≤2.

[0016] In some embodiments, the combined optical power φ3-5 of the third lens, the fourth lens, and the fifth lens and the optical power φ of the optical lens satisfy: φ3-5 / φ≥0.1.

[0017] In some embodiments, the distance d6-9 on the optical axis from the first side surface of the third lens to the second side surface of the fifth lens and the distance TL on the optical axis from the first side surface of the first lens to the second side surface of the fifth lens satisfy: d6-9 / TL ≤ 0.36; the air gap d8 on the optical axis between the fourth lens and the fifth lens and the distance TL on the optical axis from the first side surface of the first lens to the second side surface of the fifth lens satisfy: d8 / TL ≤ 0.01.

[0018] In some embodiments, the maximum clear aperture D9 of the first side surface of the fifth lens, the back focal length BFL of the optical lens, and the image height H corresponding to the maximum field of view angle of the optical lens satisfy: D9 BFL / H ≥ 42 mm.

[0019] In some embodiments, the focal length F2 of the second lens and the focal length F of the optical lens satisfy: |F2 / F| ≥ 8.

[0020] In some embodiments, the radius of curvature R3 of the first side surface of the second lens and the focal length F of the optical lens satisfy: -5 ≤ R3 / F ≤ -0.2.

[0021] In some embodiments, the radius of curvature R2 of the second side surface of the first lens and the radius of curvature R3 of the first side surface of the second lens satisfy: -2.5 ≤ R2 / R3 ≤ -0.25.

[0022] In some embodiments, the focal length F1 of the first lens and the combined focal length F345 of the third, fourth, and fifth lenses satisfy: -5 ≤ F1 / F345 ≤ -0.3.

[0023] In some embodiments, the minimum focal length Fmin and the maximum focal length Fmax among the focal lengths of the third lens, the fourth lens, and the fifth lens satisfy: 0.55 ≤ |Fmin / Fmax| ≤ 1.3.

[0024] In some embodiments, the focal length F5 of the fifth lens and the focal length F of the optical lens satisfy: 1 ≤ F5 / F ≤ 4.5.

[0025] In some embodiments, the radius of curvature R8 of the second side surface of the fourth lens and the focal length F5 of the fifth lens satisfy: -8 ≤ R8 / F5 ≤ 0.

[0026] In some embodiments, the air gap d2 on the optical axis between the first lens and the second lens and the distance TL on the optical axis from the first side surface of the first lens to the second side surface of the fifth lens satisfy: 0.06 ≤ d2 / TL ≤ 0.24.

[0027] In some embodiments, the radius of curvature R2 of the second side surface of the first lens and the focal length F of the optical lens satisfy: |R2 / F2| ≤ 0.08.

[0028] In some embodiments, the optical lens satisfies at least one of the following conditions: 50mm ≤ D9 * BFL / H ≤ 98mm; -6 ≤ F1 / F ≤ -1; -4 ≤ F1 / F345 ≤ -0.5; -4 ≤ R8 / F5 ≤ -0.15; where D9 is the maximum clear aperture of the first side surface of the fifth lens, BFL is the back focal length of the optical lens, F1 is the focal length of the first lens, F is the focal length of the optical lens, F345 is the combined focal length of the third, fourth, and fifth lenses, R8 is the radius of curvature of the second side surface of the fourth lens, and F5 is the focal length of the fifth lens.

[0029] In some embodiments, the optical lens further includes a diaphragm, and the diaphragm is located between the second lens and the third lens; the optical lens satisfies at least one of the following conditions: 56.2511° ≤ (FOV F) / H ≤ 58.8244°; 4.4942 ≤ TTL / F ≤ 5.5504; 0.1989 ≤ TTL / H / FOV × 1° ≤ 0.3315; 11.3940 ≤ TTL / H / θ ≤ 18.9925; 3.2265 ≤ TTL / DMAX ≤ 3.8385; 0.5718 ≤ (F θ) / D ≤ 0.6597; 0.0394 ≤ D / H / FOV × 1° ≤ 0.0569; 2.2598 ≤ D / H / θ ≤ 3.2576; 0.0841 ≤ D / H / F × 1mm ≤ 0.1249; 0.3614 ≤ BFL / TTL ≤ 0.4381; 0.5659 ≤ BFL / TL ≤ 0.7796; 1.4622 ≤ F / H ≤ 1.8644; F / ENPD ≤ 2.6; 1.9 ≤ F / ENPD ≤ 2; 0.1205 ≤ F / ENPD / D × 1mm ≤ 0.1418; 0.7882 ≤ DST / F ≤ 0.9931; 0.3719 ≤ T23 / TL ≤ 0.5393; 0.2062 ≤ φ3 - 5 / φ ≤ 0.7320; 0.2270 ≤ d6 - 9 / TL ≤ 0.3466; 0.1424 ≤ d6 - 9 / TTL ≤ 0.2168; 0.0021 ≤ d8 / TL ≤ 0.0066; 0.0013 ≤ d8 / TTL ≤ 0.0037; 59.9683mm ≤ D9 BFL / H ≤ 89.3136 mm; -5.0309 ≤ F1 / F ≤ -1.9868; 9.0798 ≤ |F2 / F| ≤ 532.6352; -0.7283 ≤ R3 / F ≤ -0.4683; -1.6531 ≤ R2 / R3 ≤ -0.6846; 0.7096 ≤ R4 / (R3 - d3) ≤ 0.9023; -3.2759 ≤ F1 / F345 ≤ -0.6040; 0.7310 ≤ |Fmin / Fmax| ≤ 1.2246; 1.5514 ≤ F5 / F ≤ 3.3634; -2.6067 ≤ R8 / F5 ≤ -0.4014; 0.0997 ≤ d2 / TL ≤ 0.1928; 0.0011 ≤ |R2 / F2| ≤ 0.0713, where FOV is the maximum field of view angle of the optical lens, F is the focal length of the optical lens, H is the image height corresponding to the maximum field of view angle of the optical lens, TTL is the total optical length of the optical lens, θ is the radian value corresponding to the maximum field of view angle of the optical lens, D is the maximum clear aperture of the first side of the first lens, DMAX is the maximum value among the maximum clear apertures of each optical surface from the first lens to the fifth lens, BFL is the back focal length of the optical lens, TL is the distance on the optical axis from the first side of the first lens to the second side of the fifth lens, ENPD is the entrance pupil diameter of the optical lens, DST is the aperture diameter of the diaphragm, T23 is the air gap on the optical axis between the second lens and the third lens, φ3-5 is the combined focal power of the third lens, the fourth lens and the fifth lens, φ is the focal power of the optical lens, d6-9 is the distance on the optical axis from the first side of the third lens to the second side of the fifth lens, d8 is the air gap on the optical axis between the fourth lens and the fifth lens, D9 is the maximum clear aperture of the first side of the fifth lens, F1 is the focal length of the first lens, F2 is the focal length of the second lens, F5 is the focal length of the fifth lens, F345 is the combined focal length of the third lens, the fourth lens and the fifth lens, Fmin is the minimum focal length among the focal lengths of the third lens, the fourth lens and the fifth lens, Fmax is the maximum focal length among the focal lengths of the third lens, the fourth lens and the fifth lens, R2 is the radius of curvature of the second side of the first lens, R3 is the radius of curvature of the first side of the second lens, R4 is the radius of curvature of the second side of the second lens, R8 is the radius of curvature of the second side of the fourth lens, d2 is the air gap on the optical axis between the first lens and the second lens, d3 is the central thickness of the second lens.

[0030] On the other hand, the present application provides an electronic device. The electronic device includes an optical lens provided according to the present application, and further includes at least one of the following: an imaging element for converting an optical image or optical information formed by the optical lens into an electrical signal, the imaging element being located on the second side of the optical lens, and the light rays from the first side of the optical lens are imaged on the second side after passing through the optical lens; or a light source, the light source being located on the second side of the optical lens, and the light rays emitted by the light source are projected onto the first side of the optical lens after passing through the optical lens, forming an image or illuminating an area on the first side.

[0031] The optical lens according to the embodiment of the present application includes five lenses with optical powers, which are the first lens to the fifth lens arranged in sequence along the optical axis from the first side to the second side. The air interval T23 between the second lens and the third lens on the optical axis and the distance TL on the optical axis from the first side of the first lens to the second side of the fifth lens satisfy 0.25 ≤ T23 / TL ≤ 0.9, controlling the larger air interval between the second lens and the third lens is beneficial to the smooth transition of light rays, reducing the sensitivity of the lens, and thus facilitating the processing and forming of the lens; the focal length F1 of the first lens and the focal length F of the optical lens satisfy -8 ≤ F1 / F ≤ -0.5, the optical power of the first lens is negative, and by controlling the focal length of the first lens within a reasonable range, the degree of compression of the field angle after the first lens receives a large viewing angle is appropriate, which is beneficial to reducing sensitivity; the curvature radius R3 of the first side of the second lens, the curvature radius R4 of the second side, and the central thickness d3 of the second lens satisfy 0.5 ≤ R4 / (R3 - d3) ≤ 1.2, by controlling the shape setting of the second lens, the light ray trend of the second lens can be corrected so that the field angle entering the third lens is small and the light rays are more stable, further reducing the sensitivity of the system and improving the resolution of the optical lens.

[0032] In addition, the optical lens according to the embodiment of the present application has at least one of the characteristics of miniaturization, high resolution, small telecentricity, small aperture number, long back focal length, large field angle, etc. by optimizing the shape, optical power, thickness, and spacing of each lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Combined with the accompanying drawings, through the detailed description of the following embodiments, other features, objectives, and advantages of the present application will become more obvious. In the drawings:

[0034] Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 、 Figure 11 、Figure 12 , Figure 13 , Figure 14 , Figure 15 , Figure 16 , Figure 17 , Figure 18 , Figure 19 , Figure 20 and Figure 21 respectively show schematic structural diagrams of the optical lenses according to Embodiments 1 to 21 of the present application;

[0035] Figure 22 is a schematic diagram of the MTF curve of the optical lens according to an embodiment of the present application. Specific Embodiments

[0036] To facilitate the understanding of the present application, the present application will be described more comprehensively below with reference to the relevant drawings. It should be understood that these detailed descriptions are only descriptions of the exemplary embodiments of the present application and do not limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0037] It should be noted that in this specification, the expressions such as first, second, and third are only used to distinguish one feature from another feature and do not represent any limitation on the features. Therefore, without departing from the teachings of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0038] In the drawings, for the sake of clarity, the thickness, dimensions, and shape of the lenses have been slightly exaggerated. Specifically, the spherical or aspherical shapes shown in the drawings are shown by way of example. That is, the spherical or aspherical shapes are not limited to the spherical or aspherical shapes shown in the drawings. The drawings are only examples and are not drawn to an exact scale.

[0039] In this document, 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 closest to the first side is called the first side surface of the lens, the surface of each lens closest to the second side is called the second side surface of the lens, and the surface of the optical lens closest to the second side is called the second side surface of the optical lens.

[0040] It should be understood that the optical lens provided in the present application can be used for both photography and projection. When the optical lens provided in the present application is used as a camera lens, the "first side" involved in this article can refer to the object side, and the "second side" can refer to the image side; when the optical lens provided in the present application is used as an optical lens or a lidar emission lens, the "first side" involved in this article can refer to the imaging side, and the "second side" can refer to the image source side.

[0041] It should also be understood that the terms "comprising", "including", "having", "containing" and / or "including" when used in this specification denote the presence of the stated features, elements and / or components, but do not preclude the presence or addition of one or more other features, elements, components and / or combinations thereof. In addition, when an expression such as "at least one of..." appears after the list of listed features, it modifies the entire list of listed features rather than an individual element in the list. In addition, when describing the embodiments of the present application, the use of "may" means "one or more embodiments of the present application". And the term "exemplary" is intended to refer to an example or illustration.

[0042] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It should also be understood that terms (such as those defined in a common dictionary) should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formalized sense unless expressly so defined herein.

[0043] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0044] The features, principles and other aspects of the present application will be described in detail below.

[0045] In an exemplary embodiment, the optical lens may include, for example, five lenses having optical power, namely, a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. These five lenses are arranged in sequence along the optical axis from the first side to the second side.

[0046] In an exemplary embodiment, the optical lens provided in the present application can be used as, for example, a projection lens or a lidar emission end lens. At this time, the second side of the optical lens can be the image source side, and the first side can be the object side. The image source surface of the optical lens is provided on the second side of the optical lens.

[0047] In an exemplary embodiment, the optical lens provided by the present application can be used as, for example, an in-vehicle camera lens or a lidar receiving end lens. At this time, the first side of the optical lens can be the object side, and the second side can be the image side. Light from the object side can form an image on the image side. The imaging surface of the optical lens is provided on the second side of the optical lens.

[0048] In an exemplary embodiment, the optical lens may further include a photosensitive element disposed on the second side surface. Optionally, the photosensitive element disposed on the second side surface can be a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor element (CMOS).

[0049] In an exemplary embodiment, the first lens may have a negative focal power. Its first side surface is convex, and its second side surface is concave. The first lens having a negative focal power serves to diffuse light, collecting as much light as possible in a large field of view and guiding it into the subsequent optical system, which is beneficial for achieving a large field of view angle. Among them, the convex first side surface of the first lens is conducive to converging light to achieve a large field of view angle. The concave second side surface of the first lens can rapidly diverge the light passing through the first lens to the second lens, reducing the field of view entering the second lens, which is beneficial for the subsequent second lens to correct the field of view aberration and improve the system resolution.

[0050] In an exemplary embodiment, the first lens may have a negative focal power. Its first side surface is flat, and its second side surface is concave. The first lens having a negative focal power serves to diffuse light, collecting as much light as possible in a large field of view and guiding it into the subsequent optical system, which is beneficial for achieving a large field of view angle. The flat first side surface of the first lens serves to transition the light to the second side surface. The concave second side surface of the first lens can diverge the large-angle light passing through the first lens, which is beneficial for the subsequent optical system to correct the aberration caused by the large-angle light and achieve high resolution.

[0051] In an exemplary embodiment, the second lens may have a positive focal power. Its first side surface is concave, and its second side surface is convex. The second lens having a positive focal power serves to converge light, cooperating with the first lens to converge and compress the diverging large-field-of-view light to the rear group, achieving a large field of view and improving the edge resolution. The concave first side surface of the second lens serves to slightly diffuse the light converged by the front group to the rear group. The convex second side surface of the second lens serves to converge the light to the third lens. The concave-convex shape setting of the second lens makes the light in the front and rear groups of the optical lens stable, that is, the light from the second lens to the third lens has a smooth transition, which is beneficial for reducing the system sensitivity.

[0052] In an exemplary embodiment, the second lens may have a negative focal power, with its first side being concave and its second side being convex. The second lens having a negative focal power has a diverging effect on light rays. It receives the light rays passing through the first lens, making the height of the marginal field beam higher and the width wider, which is beneficial for improving the relative illuminance of the marginal field. The concave-convex shape setting of the second lens is conducive to the smooth transition of the light rays from the second lens to the third lens, and is beneficial for reducing the system sensitivity.

[0053] In an exemplary embodiment, the third lens may have a negative focal power, with its first side being concave and its second side being concave. The third lens having a negative focal power, when paired with the second lens having a positive focal power, is beneficial for collecting the light rays converged by the first lens and the second lens and appropriately diffusing them, making the light ray trend smoother, and is beneficial for lengthening the back focal length. The first side of the third lens being concave is beneficial for collecting the light rays entering through the second lens and making the light ray trend transition smoothly. The second side of the third lens being concave serves to transition the light rays to the fourth lens.

[0054] In an exemplary embodiment, the third lens may have a negative focal power, with its first side being flat and its second side being concave. The third lens having a negative focal power has a diverging effect on light rays. The first side of the third lens being flat can smoothly receive the light rays passing through the second lens, enabling the light rays emitted by the second lens to enter the rear optical system smoothly. The second side of the third lens being concave serves to slightly diffuse the overly converged light rays in the front, which is beneficial for achieving a long back focal length.

[0055] In an exemplary embodiment, the third lens may have a negative focal power, with its first side being convex and its second side being concave. The third lens having a negative focal power has a diverging effect on light rays. The first side of the third lens being convex has a light-converging effect and can smoothly transition the overly diverged light rays of the front group to the rear group. The second side being concave is beneficial for achieving a long back focal length.

[0056] In an exemplary embodiment, the third lens may have a positive focal power, with its first side being convex and its second side being convex. The third lens having a positive focal power, when paired with the second lens having a negative focal power, is beneficial for converging the light rays diffused by the second lens, further making the light ray trend smoother, and is beneficial for lengthening the back focal length. The first side of the third lens being convex has a strong light-converging ability, which is beneficial for achieving a large FOV (Field Of View). The second side of the third lens being convex serves to transition the light rays to the fourth lens.

[0057] In an exemplary embodiment, the fourth lens may have positive power, and its first side surface is convex, and its second side surface is convex. The fourth lens has positive power and has a converging effect on light. The first side surface and the second side surface of the fourth lens are both convex, which enhances the converging effect and makes the trend of the rear group of light flat, which is conducive to achieving a small CRA (Chief Ray Angle) and better matching with various chips.

[0058] In an exemplary embodiment, the fourth lens may have a negative optical power, and its first side surface is a concave surface and the second side surface is a convex surface. The optical power of the fourth lens is negative, which is conducive to slightly diverging the excessively converged light of the front group, so that the light smoothly transitions to the fifth lens, which is conducive to achieving a long back focus. The first side surface of the fourth lens is a concave surface, which plays a role in slightly diffusing the excessively converged light of the front group, which is conducive to achieving a long back focus. The second side surface of the fourth lens is a convex surface, which plays a role in converging the light of the rear group, which is conducive to smoothly transitioning the excessively divergent light of the front group to the rear group, thereby reducing the pressure of the convergent light of the rear fifth lens, making the light trend smooth and improving the resolution ability.

[0059] In an exemplary embodiment, the fifth lens may have positive power, and its first side surface is convex and its second side surface is concave. The fifth lens has positive power and receives the front light, which is beneficial to improving the resolution. The first side surface of the fifth lens is convex, which further converges the light emitted by the fourth lens, so that the light transitions smoothly, and assists the fourth lens to achieve a small CRA. The second side surface of the fifth lens is concave, which is beneficial to make the light transition smoothly to the image plane.

[0060] In an exemplary embodiment, the fifth lens may have positive optical power, and its first side surface is convex, and its second side surface is convex. The first side surface and the second side surface of the fifth lens are both convex, which is conducive to receiving and converging the light emitted by the fourth lens, so that the light smoothly transitions to the image plane.

[0061] In an exemplary embodiment, the fifth lens may have positive power, a first side surface of the fifth lens is a plane, and a second side surface is a convex surface. The first side surface of the fifth lens is a plane, and plays a role of transitioning light to the second side surface.

[0062] In an exemplary embodiment, the fifth lens may have positive power, a first side surface of the fifth lens is concave, and a second side surface of the fifth lens is convex. The first side surface of the fifth lens is concave, and plays a role of transitioning light to the second side surface.

[0063] In an exemplary embodiment, the fifth lens may have positive power, a first side surface of the fifth lens is a convex surface, and a second side surface is a plane surface. The second side surface of the fifth lens is a plane surface, which plays a role in smoothly transitioning light to the image plane.

[0064] In an exemplary embodiment, a diaphragm may be provided in the optical lens. For example, the diaphragm may be disposed between the second lens and the third lens, which is conducive to effectively converging the light entering the optical lens, reducing the lens aperture at the rear end of the optical system, and reducing the assembly sensitivity of the system. However, it should be noted that the position of the diaphragm disclosed herein is only an example and not a limitation; in an alternative embodiment, the diaphragm may also be disposed at other positions according to actual needs.

[0065] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.25 ≤ T23 / TL ≤ 0.9, where T23 is the air gap between the second lens and the third lens on the optical axis, and TL is the total lens length of the optical lens, that is, the distance on the optical axis from the first side surface of the first lens to the second side surface of the fifth lens. Satisfying 0.25 ≤ T23 / TL ≤ 0.9, the air gap between the second lens and the third lens is relatively large, resulting in a large aperture for the light to enter the rear, which is conducive to the rear system correcting aberration and reducing the system sensitivity. More specifically, T23 and TL may further satisfy: 0.3 ≤ T23 / TL ≤ 0.6. By controlling the ratio of the air gap between the second lens and the third lens to the total lens length of the optical lens within this range, the system aberration can be corrected more effectively and the system sensitivity can be reduced.

[0066] In an exemplary embodiment, the optical lens according to the present application may satisfy: -8 ≤ F1 / F ≤ -0.5, where F1 is the focal length of the first lens and F is the focal length of the optical lens. By setting the optical power of the first lens to be negative and controlling the focal length range of the first lens, the degree of compression of the field of view after the first lens receives a large field of view is appropriate, which is conducive to reducing the sensitivity. More specifically, F1 and F may further satisfy: -6 ≤ F1 / F ≤ -1. By controlling the focal length of the first lens within a reasonable range, it is beneficial to further reduce the system sensitivity.

[0067] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.5 ≤ R4 / (R3 - d3) ≤ 1.2, where R3 is the radius of curvature of the first side surface of the second lens, R4 is the radius of curvature of the second side surface of the second lens, and d3 is the central thickness of the second lens. Satisfying the conditional expression 0.5 ≤ R4 / (R3 - d3) ≤ 1.2, controlling the shape of the second lens to be similar to a concentric circle lens can correct the light path of the second lens so that the field of view angle entering the third lens is small, making the light more stable, thereby further reducing the system sensitivity and improving the resolution of the optical lens.

[0068] In an exemplary embodiment, the optical lens according to the present application may satisfy: (FOV F) / H ≥ 45°, where FOV is the maximum field of view angle of the optical lens and H is the image height corresponding to the maximum field of view angle of the optical lens. Satisfying (FOV F) / H ≥ 45°, which is conducive to meeting the large field of view and long focal length characteristics, and at the same time helps to improve the central resolution of the optical lens. Further, the optical lens can satisfy 50° ≤ (FOV F) / H ≤ 60°, which is conducive to further meeting the large field of view and long focal length characteristics and further improving the central resolution of the lens.

[0069] In an exemplary embodiment, the optical lens according to the present application can satisfy: TTL / F ≤ 6.5, where TTL is the total optical length of the optical lens, that is, the distance on the optical axis from the first side surface of the first lens to the imaging surface (or image source surface) of the optical lens. Satisfying TTL / F ≤ 6.5 and achieving a shorter TTL when the focal length is fixed is conducive to realizing the miniaturization of the optical lens. Further, the optical lens can satisfy 4 ≤ TTL / F ≤ 6, which is conducive to further realizing the miniaturization of the lens.

[0070] In an exemplary embodiment, the optical lens according to the present application can satisfy: TTL / H / FOV × 1° ≤ 0.8. Satisfying this conditional formula and having a shorter TTL at the same field of view angle is conducive to realizing the miniaturization of the lens. Further, the optical lens can satisfy 0.1 ≤ TTL / H / FOV × 1° ≤ 0.5, which is conducive to further realizing the miniaturization of the lens.

[0071] In an exemplary embodiment, the optical lens according to the present application can satisfy: TTL / H / θ ≤ 25, where θ is the radian value corresponding to the maximum field of view angle of the optical lens. Satisfying this conditional formula and having a shorter TTL at the same image surface is conducive to realizing the miniaturization of the lens. Further, the optical lens can satisfy 10 ≤ TTL / H / θ ≤ 22, which is conducive to further realizing the miniaturization of the lens.

[0072] In an exemplary embodiment, the optical lens according to the present application can satisfy: TTL / DMAX ≤ 6, where DMAX is the maximum value among the maximum clear apertures of the optical surfaces of the first lens to the fifth lens. Satisfying this conditional formula can make the total system length relatively short, which is conducive to realizing the miniaturization of the lens. Further, the optical lens can satisfy 2 ≤ TTL / DMAX ≤ 5.5, which is conducive to further realizing the miniaturization of the lens.

[0073] In an exemplary embodiment, the optical lens according to the present application can satisfy: (F θ) / D ≥ 0.35, where D is the maximum clear aperture of the first side surface of the first lens. Satisfying this conditional formula and having a smaller aperture at a certain field of view angle is conducive to realizing the miniaturization of the lens. Further, the optical lens can satisfy 0.4 ≤ (F*θ) / D ≤ 0.8, which is conducive to further realizing the miniaturization of the lens.

[0074] In an exemplary embodiment, the optical lens according to the present application may satisfy: D / H / FOV×1°≤0.08. Meeting this conditional expression, at a certain image height, the aperture is relatively small, which is beneficial to the miniaturization of the lens. Further, the optical lens may satisfy 0.02≤D / H / FOV×1°≤0.06, which is beneficial to further realizing the miniaturization of the lens.

[0075] In an exemplary embodiment, the optical lens according to the present application may satisfy: D / H / θ≤5. Meeting this conditional expression, at a certain image height, the aperture is relatively small, which is beneficial to the miniaturization of the lens. Further, the optical lens may satisfy 1.5≤D / H / θ≤3.5, which is beneficial to further realizing the miniaturization of the lens.

[0076] In an exemplary embodiment, the optical lens according to the present application may satisfy: D / H / F×1mm≤0.2. Meeting this conditional expression, at a certain field of view angle and focal length, the aperture is relatively small, which is beneficial to the miniaturization of the lens. Further, the optical lens may satisfy 0.05≤D / H / F×1mm≤0.15, which is beneficial to further realizing the miniaturization of the lens.

[0077] In an exemplary embodiment, the optical lens according to the present application may satisfy: BFL / TTL≥0.3, where BFL is the back focal length of the optical lens, that is, the distance from the second side of the fifth lens to the imaging surface (or image source surface) of the optical lens on the optical axis. Meeting this conditional expression helps to achieve a long back focal effect, leaving enough space for adding optical devices such as prisms, and is easy to process and assemble.

[0078] In an exemplary embodiment, the optical lens according to the present application may satisfy: BFL / TL≥0.42. Meeting this conditional expression helps to achieve a long back focal effect, leaving enough space for adding optical devices such as prisms, and is easy to process and assemble.

[0079] In an exemplary embodiment, the optical lens according to the present application may satisfy: 1.3≤F / H≤2. Meeting this conditional expression, by controlling the focal length and image height within a certain range, it is beneficial to improve the resolution.

[0080] In an exemplary embodiment, the optical lens according to the present application may satisfy: F / ENPD≤2.6, where ENPD is the entrance pupil diameter of the optical lens. Meeting this conditional expression is beneficial to achieving a small FNO, and at the same time is beneficial to increasing the light passing amount, which helps to improve the relative illumination. Further, the optical lens may satisfy 1.9≤F / ENPD≤2, which is beneficial to further achieving a small FNO and improving the relative illumination.

[0081] In an exemplary embodiment, the optical lens according to the present application may satisfy: F / ENPD / D×1mm≤0.15. Satisfying this conditional expression is conducive to achieving a small FNO, and at the same time is conducive to increasing the light passing amount, and helps to improve the relative illuminance.

[0082] In an exemplary embodiment, the optical lens according to the present application may satisfy: DST / F≥0.65, where DST is the aperture diameter. Satisfying this conditional expression and controlling the ratio of the aperture diameter to the effective focal length of the lens to be relatively large is conducive to the lens achieving the large aperture characteristic.

[0083] In an exemplary embodiment, the optical lens according to the present application may satisfy: φ3-5 / φ≥0.1, where φ3-5 is the combined optical power of the third lens, the fourth lens, and the fifth lens, and φ is the optical power of the optical lens. Satisfying this conditional expression and reasonably distributing the optical power of the rear group is conducive to making the rear group focal length longer while maintaining miniaturization, and is conducive to achieving the long back focal characteristic. Further, the optical lens may satisfy 0.1≤φ3-5 / φ≤0.8, which is conducive to further reasonably distributing the optical power of the rear group, making the rear group focal length longer while maintaining miniaturization, and further achieving the long back focal characteristic.

[0084] In an exemplary embodiment, the optical lens according to the present application may satisfy: d6-9 / TL≤0.36, where d6-9 is the distance on the optical axis from the first side surface of the third lens to the second side surface of the fifth lens. Satisfying this conditional expression and controlling the distance between the first side surface of the third lens and the second side surface of the fifth lens to be relatively small is conducive to achieving lens miniaturization.

[0085] In an exemplary embodiment, the optical lens according to the present application may satisfy: d6-9 / TTL≤0.24. Satisfying this conditional expression and controlling the distance between the first side surface of the third lens and the second side surface of the fifth lens to be relatively small is conducive to achieving lens miniaturization.

[0086] In an exemplary embodiment, the optical lens according to the present application may satisfy: d8 / TL≤0.01, where d8 is the air gap between the fourth lens and the fifth lens on the optical axis. Satisfying this conditional expression and controlling the air gap of the rear group of lenses to be relatively small, so that the angle at which the diffused large-aperture light enters the fifth lens is relatively small, is conducive to achieving lens miniaturization.

[0087] In an exemplary embodiment, the optical lens according to the present application may satisfy: d8 / TTL≤0.005. Satisfying this conditional expression and controlling the air gap of the rear group of lenses to be relatively small, so that the angle at which the diffused large-aperture light enters the fifth lens is relatively small, is conducive to achieving lens miniaturization.

[0088] In an exemplary embodiment, the optical lens according to the present application may satisfy: D9 BFL / H ≥ 42 mm, where D9 is the maximum clear aperture of the first side surface of the fifth lens. The larger the aperture of the first side surface of the fifth lens, the smaller the aperture aberration can be made, and the light rays in different regions can be corrected more precisely. Meeting this conditional formula is beneficial to correcting the incident angle of the marginal field of view of the light rays emitted from the fifth lens to the image plane, and thus is beneficial to achieving a small CRA. Further, the optical lens can satisfy 50 mm ≤ D9 BFL / H ≤ 98 mm, which is beneficial to further correcting the incident angle of the marginal field of view of the light rays emitted from the fifth lens to the image plane, and thus achieving a smaller CRA.

[0089] In an exemplary embodiment, the optical lens according to the present application can satisfy: |F2 / F| ≥ 8, where F2 is the focal length of the second lens. Meeting this conditional formula, by reasonably allocating the focal length of the second lens and keeping the focal length of the second lens relatively large, the light rays can enter the optical system smoothly. At the same time, with the light angle of the first lens being negative, it is beneficial to collect light, thereby ensuring the light transmission amount of the optical system and improving the resolution.

[0090] In an exemplary embodiment, the optical lens according to the present application can satisfy: -5 ≤ R3 / F ≤ -0.2, where R3 is the radius of curvature of the first side surface of the second lens. Meeting this conditional formula, by controlling the radius of curvature of the first side surface of the second lens within a reasonable range, the second lens preliminarily converges the light rays emitted from the first lens, which is beneficial to reducing the field of view angle and making it transition smoothly to the rear, thereby reducing the system sensitivity. Further, the optical lens can satisfy -0.9 ≤ R3 / F ≤ -0.35, which is beneficial to further reducing the field of view angle and making it transition smoothly to the rear, and further reducing the system sensitivity.

[0091] In an exemplary embodiment, the optical lens according to the present application can satisfy: -2.5 ≤ R2 / R3 ≤ -0.25, where R2 is the radius of curvature of the second side surface of the first lens. Meeting this conditional formula, by controlling the second side surface of the first lens to be concave, the light ray trend can be made steeper and the optical path can be shortened; combined with the first side surface of the second lens being concave, the light ray trend can be made smooth. Moreover, by reasonably matching the radii of curvature of these two optical surfaces, miniaturization can be achieved while reducing the system sensitivity. Further, the optical lens can satisfy -2 ≤ R2 / R3 ≤ -0.3, which is beneficial to further achieving miniaturization while reducing the system sensitivity.

[0092] In an exemplary embodiment, the optical lens according to the present application can satisfy: -5 ≤ F1 / F345 ≤ -0.3, where F345 is the combined focal length of the third lens, the fourth lens, and the fifth lens. By satisfying this conditional expression, through reasonable control of the focal length of the first lens, the first lens can receive a large field of view and compress the field of view of the light rays in the large field of view, which is beneficial for the rear group of lenses to correct and reduce chromatic aberration. At the same time, it is beneficial to ensure that the sensitivity of the first lens is appropriate. If the focal length of the first lens is too large, it is not conducive to receiving light rays in the large field of view. If the focal length is too small, the sensitivity is high, which is not conducive to resolution. Further, the optical lens can satisfy -4 ≤ F1 / F345 ≤ -0.5, which is beneficial for further enabling the first lens to receive light rays in the large field of view, thereby facilitating the correction of the rear group of lenses and reducing chromatic aberration.

[0093] In an exemplary embodiment, the optical lens according to the present application can satisfy: 0.55 ≤ |Fmin / Fmax| ≤ 1.3, where Fmin is the minimum focal length among the focal lengths of the third lens, the fourth lens, and the fifth lens, and Fmax is the maximum focal length among the focal lengths of the third lens, the fourth lens, and the fifth lens. By satisfying the conditional expression, the focal length distribution in the rear group of lenses is uniform, and the degree of deflection of light rays in the third lens, the fourth lens, and the fifth lens is relatively close, which is beneficial for the smooth transition of light rays and improves resolution.

[0094] In an exemplary embodiment, the optical lens according to the present application can satisfy: 1 ≤ F5 / F ≤ 4.5, where F5 is the focal length of the fifth lens. By satisfying this conditional expression, the fifth lens has a positive optical power and the focal length is set within a reasonable range, which can ensure that the light rays are converged to the image plane while achieving a small CRA.

[0095] In an exemplary embodiment, the optical lens according to the present application can satisfy: -8 ≤ R8 / F5 ≤ 0, where R8 is the radius of curvature of the second side surface of the fourth lens. By satisfying this conditional expression, through the control of the surface shape setting of the second side surface of the fourth lens, the fourth lens can share the pressure of the fifth lens to converge light rays, thereby improving the resolution of the system. Further, the optical lens can satisfy -4 ≤ R8 / F5 ≤ -0.15, which is beneficial for the fourth lens to further share the pressure of the fifth lens to converge light rays and improve the resolution.

[0096] In an exemplary embodiment, the optical lens according to the present application can satisfy: 0.06 ≤ d2 / TL ≤ 0.24, where d2 is the air gap between the first lens and the second lens on the optical axis. When the air gap between the first lens and the second lens is too small, the light transmission path is too small, and the degree of correction of the light rays by the rear system will be deeper, which will bring greater sensitivity pressure to the system. By satisfying this conditional expression, by controlling the air gap between the first lens and the second lens, the sensitivity can be reduced on the premise of ensuring miniaturization.

[0097] In an exemplary embodiment, the optical lens according to the present application may satisfy: |R2 / F2|≤0.08, where R2 is the radius of curvature of the second side surface of the first lens, and F2 is the focal length of the second lens. When this condition is satisfied, the second side surface of the first lens is controlled to be a concave surface, which has a diffusion effect on the light, and at the same time, with the reasonable distribution of the focal length of the second lens, the field of view can be further corrected, so that the field of view angle of the light passing through the second lens when entering the third lens is smaller, and the light is more stable, thereby reducing the sensitivity of the system.

[0098] According to the optical lens of the above-mentioned embodiment of the present application, by reasonably setting the number of lenses and the shapes and optical focal lengths of each lens, the optical lens can meet the requirements of miniaturization, high resolution (MTF within the spatial cutoff frequency of 60lp / mm is greater than 0.4), small telecentricity (telecentricity is less than 2°), long back focus (back focus length is greater than 15mm), small F number (FNO≤2.0) and large field of view (greater than 20°) by using only five lenses.

[0099] In an exemplary embodiment, at least one of the optical surfaces of the first lens to the fifth lens of the optical lens has an inflection. The setting of the inflection is conducive to further correcting the light, so that the light smoothly transitions to the next surface, and the inflection can correct the edge light angle, reduce the edge field aberration, and improve the resolution. In an exemplary embodiment, the first side surface of the first lens or the first side surface of the fifth lens may have an inflection point. The setting of the inflection point is conducive to achieving better correction of the aberration of the light emitted from different fields of view while maintaining the overall shape of the lens.

[0100] In an exemplary embodiment, as needed, the optical lens of the present application may further include a filter and / or a protective glass disposed between the fifth lens and the imaging surface to filter light with different wavelengths to prevent damage to the image-side element (e.g., chip) of the optical lens.

[0101] In an exemplary embodiment, the first lens to the fifth lens may be a spherical lens or an aspherical lens. Exemplarily, at least one of the first lens to the fifth lens is an aspherical lens. The characteristic of an aspherical lens is that the curvature changes continuously from the center of the lens to the periphery. Unlike a spherical lens with a constant curvature from the center of the lens to the periphery, an aspherical lens has a better curvature radius characteristic, and has the advantages of improving distortion aberration and improving astigmatism aberration. After adopting an aspherical lens, the aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality of the lens. 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, or even all lenses use aspherical lenses.

[0102] In an exemplary embodiment, the first lens, the second lens, or the fifth lens is an aspherical lens. The setting of the aspherical lens can change the surface shape, thereby changing the angle of light refraction, reducing the system aberration, and further improving the resolution. It should be emphasized that according to actual needs, other lenses can also adopt aspherical surfaces.

[0103] In an exemplary embodiment, the second lens is an aspherical lens, with a concavo-convex shape close to concentric circles, which is more conducive to reducing the sensitivity of the front group and improving the system resolution. The MTF within the spatial cut-off frequency of 60 lp / mm is greater than 0.6.

[0104] In an exemplary embodiment, the third lens and the fourth lens can form a cemented lens. After the third lens and the fourth lens are cemented, chromatic aberration can be better corrected to improve the resolution, and the tolerance sensitivity of the third lens and the fourth lens can also be reduced after cementing. At the same time, when the third lens and the fourth lens are cemented, the light passing through the front lens can be smoothly transitioned to the rear optical system, reducing the total length of the lens; and various aberrations of the optical system can be fully corrected. On the premise of a compact structure, the resolution can be improved, and optical performances such as distortion and CRA can be optimized.

[0105] In addition, the above-mentioned cementing method between lenses has at least one of the following advantages: reducing the air gap between the two lenses and the total length of the system; reducing the assembly components between the lenses, reducing the process, and lowering the cost; reducing the tolerance sensitivity problems such as tilt / eccentricity generated during the assembly process of the lens unit, and improving the production yield; reducing the light loss caused by reflection between the lenses and enhancing the illuminance; further reducing the field curvature and effectively correcting the off-axis aberrations of the system. Such a cemented design shares the overall chromatic aberration correction of the system, effectively corrects the aberrations to improve the resolution, and makes the overall optical lens compact, meeting the miniaturization requirements.

[0106] In an exemplary embodiment, the first lens to the fifth lens can be glass lenses or plastic lenses. The present application does not specifically limit the specific number of glass lenses and plastic lenses. Specifically, when focusing on the resolution quality and reliability, the first lens to the fifth lens can all be glass aspherical lenses. The optical lens made of glass can suppress the shift of the back focal length of the imaging system components with temperature change to improve the system stability. At the same time, using glass material can avoid problems such as blurred imaging of the lens and affecting the normal use of the lens caused by high and low temperature changes in the use environment. Of course, the first lens to the fifth lens of the optical lens can also be made of a combination of plastic and glass. Of course, in application scenarios with lower temperature stability requirements, the first lens to the fifth lens in the optical lens can also be all made of plastic. Making the optical lens with plastic can effectively reduce the manufacturing cost.

[0107] However, those skilled in the art should understand that, without departing from the technical solutions claimed in this application, the number of lenses constituting the 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.

[0108] Specific embodiments of the optical lens applicable to the above embodiments will be further described below with reference to the accompanying drawings.

[0109] Embodiment 1

[0110] The following will be described with reference to Figure 1 the optical lens according to Embodiment 1 of the present application. Figure 1 A schematic structural diagram of the optical lens according to Embodiment 1 of the present application is shown.

[0111] As Figure 1 shown, the optical lens sequentially includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, and a fifth lens L5 along the optical axis from the first side to the second side.

[0112] In this embodiment, the optical lens further includes a stop STO, and the stop STO is disposed between the second lens L2 and the third lens L3.

[0113] In this embodiment, the third lens L3 and the fourth lens L4 form a cemented lens.

[0114] The first lens L1 has a negative optical power, its first side S1 is a convex surface, and its second side S2 is a concave surface. The second lens L2 has a positive optical power, its first side S3 is a concave surface, and its second side S4 is a convex surface. The third lens L3 has a negative optical power, its first side S5 is a concave surface, and its second side S6 is a concave surface. The fourth lens L4 has a positive optical power, its first side S6 is a convex surface, and its second side S7 is a convex surface. The fifth lens L5 has a positive optical power, its first side S8 is a convex surface, and its second side S9 is a convex surface.

[0115] In this embodiment, the optical lens may further include a filter, a protective glass, and a flat glass located between the fifth lens L5 and the imaging surface IMA. The filter has a first side S10 and a second side S11, the protective glass has a first side S12 and a second side S13, and the flat glass has a first side S14 and a second side S15.

[0116] The optical lens provided by the present application can be used as, for example, an in-vehicle camera lens. At this time, light from an object sequentially passes through each optical surface S1 to S15 and finally forms an image on the imaging surface IMA provided on the second side, and an image sensor chip is provided at the imaging surface IMA. In this embodiment, the second side surface S15 of the flat glass coincides with the imaging surface IMA.

[0117] It should be understood that the optical lens provided by the present application can also be used as, for example, a projection lens or a lidar transmitter lens. At this time, light from the image source surface IMA sequentially passes through each optical surface S15 to S1 and finally projects onto a projection surface (not shown) provided on the first side.

[0118] Table 1 shows the radius of curvature R, thickness / distance, refractive index Nd, and dispersion coefficient Vd of each lens of the optical lens of Example 1.

[0119] Table 1

[0120]

[0121] In this embodiment, the first side surface S3 and the second side surface S4 of the second lens L2 of the optical lens are aspherical mirror surfaces, and the surface profiles of the aspherical mirror surfaces can be defined by, but not limited to, the following aspherical formula (1).

[0122] (1)

[0123] Wherein, x is the sagitta of the aspherical surface at a position with a height of h from the vertex of the aspherical surface along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; Ai is the i -th order correction coefficient of the aspherical surface.

[0124] Table 2 shows the conic coefficients (k) and higher-order term coefficients A4 , A6 , A8 , A10 , A12 , A14 and A16 that can be used for the aspherical mirror surfaces in this embodiment.

[0125] Table 2

[0126]

[0127] Example 2

[0128] Refer to the following Figure 2 to describe the optical lens according to Embodiment 2 of the present application. For the sake of simplicity, in this embodiment and the following embodiments, some descriptions similar to those in Embodiment 1 will be omitted.

[0129] As Figure 2 shown, the optical lens sequentially includes a first lens L1, a second lens L2, a stop STO, a third lens L3, a fourth lens L4, and a fifth lens L5 along the optical axis from the first side to the second side. Among them, the third lens L3 and the fourth lens L4 form a cemented lens.

[0130] The first lens L1 has a negative focal power, its first side S1 is convex, and its second side S2 is concave. The second lens L2 has a positive focal power, its first side S3 is concave, and its second side S4 is convex. The third lens L3 has a negative focal power, its first side S5 is concave, and its second side S6 is concave. The fourth lens L4 has a positive focal power, its first side S6 is convex, and its second side S7 is convex. The fifth lens L5 has a positive focal power, its first side S8 is convex, and its second side S9 is convex.

[0131] Table 3 shows the radius of curvature R, thickness / distance, refractive index Nd, and dispersion coefficient Vd of each lens of the optical lens according to Embodiment 2.

[0132] Table 3

[0133]

[0134] In this embodiment, the first side S3 and the second side S4 of the second lens L2 of the optical lens are aspherical surfaces, and the surface profiles of the aspherical surfaces can be defined by, but not limited to, the formula (1) given in the above Embodiment 1.

[0135] Table 4 shows the conic coefficient (k) and higher-order term coefficients A4 , A6 , A8 , A10 , A12 , A14 and A16 .

[0136] Table 4

[0137]

[0138] Embodiment 3

[0139] Refer to the following Figure 3 to describe the optical lens according to Embodiment 3 of the present application.

[0140] As Figure 3As shown in the figure, the optical lens sequentially includes a first lens L1, a second lens L2, a stop STO, a third lens L3, a fourth lens L4, and a fifth lens L5 along the optical axis from the first side to the second side. Among them, the third lens L3 and the fourth lens L4 form a cemented lens.

[0141] The first lens L1 has a negative focal power. Its first side S1 is a plane, and its second side S2 is a concave surface. The second lens L2 has a positive focal power. Its first side S3 is a concave surface, and its second side S4 is a convex surface. The third lens L3 has a negative focal power. Its first side S5 is a convex surface, and its second side S6 is a concave surface. The fourth lens L4 has a positive focal power. Its first side S6 is a convex surface, and its second side S7 is a convex surface. The fifth lens L5 has a positive focal power. Its first side S8 is a convex surface, and its second side S9 is a convex surface.

[0142] Table 5 shows the radius of curvature R, thickness / distance, refractive index Nd, and dispersion coefficient Vd of each lens of the optical lens of Example 3.

[0143] Table 5

[0144]

[0145] In this embodiment, the first side S3 and the second side S4 of the second lens L2 of the optical lens, and the first side S8 and the second side S9 of the fifth lens L5 are aspherical mirror surfaces. The surface profiles of the aspherical mirror surfaces can be defined by, but are not limited to, the formula (1) given in the above Example 1.

[0146] Table 6 shows the conic coefficient (k) and higher-order term coefficients that can be used for the aspherical mirror surfaces in this embodiment A4 , A6 , A8 , A10 , A12 , A14 and A16 .

[0147] Table 6

[0148]

[0149] Example 4

[0150] The following is a reference to Figure 4 describe the optical lens according to Embodiment 4 of the present application.

[0151] As Figure 4 shown, the optical lens sequentially includes a first lens L1, a second lens L2, a stop STO, a third lens L3, a fourth lens L4, and a fifth lens L5 along the optical axis from the first side to the second side.

[0152] The first lens L1 has a negative focal power, its first side S1 is a plane, and its second side S2 is a concave surface. The second lens L2 has a positive focal power, its first side S3 is a concave surface, and its second side S4 is a convex surface. The third lens L3 has a negative focal power, its first side S5 is a convex surface, and its second side S6 is a concave surface. The fourth lens L4 has a positive focal power, its first side S6 is a convex surface, and its second side S7 is a convex surface. The fifth lens L5 has a positive focal power, its first side S8 is a convex surface, and its second side S9 is a convex surface.

[0153] Table 7 shows the radius of curvature R, thickness / distance, refractive index Nd, and dispersion coefficient Vd of each lens of the optical lens according to Embodiment 4.

[0154] Table 7

[0155]

[0156] In this embodiment, the first side S3 and the second side S4 of the second lens L2 of the optical lens, and the first side S8 and the second side S9 of the fifth lens L5 are aspherical surfaces, and the surface profiles of the aspherical surfaces can be defined by, but are not limited to, the formula (1) given in Embodiment 1 above.

[0157] Table 8 shows the conic coefficient (k) and higher-order term coefficients that can be used for the aspherical surfaces in this embodiment A4 , A6 , A8 , A10 , A12 , A14 and A16 .

[0158] Table 8

[0159]

[0160] Embodiment 5

[0161] The following refers to Figure 5 to describe the optical lens according to Embodiment 5 of the present application.

[0162] As Figure 5 shown, the optical lens sequentially includes a first lens L1, a second lens L2, a diaphragm STO, a third lens L3, a fourth lens L4, and a fifth lens L5 along the optical axis from the first side to the second side. Among them, the third lens L3 and the fourth lens L4 form a cemented lens.

[0163] The first lens L1 has a negative focal power, its first side S1 is convex, and its second side S2 is concave. The second lens L2 has a positive focal power, its first side S3 is concave, and its second side S4 is convex. The third lens L3 has a negative focal power, its first side S5 is flat, and its second side S6 is concave. The fourth lens L4 has a positive focal power, its first side S6 is convex, and its second side S7 is convex. The fifth lens L5 has a positive focal power, its first side S8 is convex, and its second side S9 is convex.

[0164] Table 9 shows the radius of curvature R, thickness / distance, refractive index Nd, and dispersion coefficient Vd of each lens of the optical lens of Example 5.

[0165] Table 9

[0166]

[0167] In this embodiment, the first side S3 and the second side S4 of the second lens L2 of the optical lens are aspherical mirror surfaces, and the surface profiles of the aspherical mirror surfaces can be defined by, but not limited to, the formula (1) given in the above Example 1.

[0168] Table 10 shows the conic coefficient (k) and higher-order term coefficients that can be used for the aspherical mirror surfaces in this embodiment A4 , A6 , A8 , A10 , A12 , A14 and A16 .

[0169] Table 10

[0170]

[0171] Example 6

[0172] The following refers to Figure 6 to describe the optical lens according to Embodiment 6 of the present application.

[0173] As Figure 6 shown, the optical lens sequentially includes a first lens L1, a second lens L2, a diaphragm STO, a third lens L3, a fourth lens L4, and a fifth lens L5 along the optical axis from the first side to the second side. Among them, the third lens L3 and the fourth lens L4 form a cemented lens.

[0174] The first lens L1 has a negative optical power. Its first side S1 is convex, and its second side S2 is concave. The second lens L2 has a positive optical power. Its first side S3 is concave, and its second side S4 is convex. The third lens L3 has a negative optical power. Its first side S5 is flat, and its second side S6 is concave. The fourth lens L4 has a positive optical power. Its first side S6 is convex, and its second side S7 is convex. The fifth lens L5 has a positive optical power. Its first side S8 is convex, and its second side S9 is convex.

[0175] Table 11 shows the radius of curvature R, thickness / distance, refractive index Nd, and dispersion coefficient Vd of each lens of the optical lens according to Example 6.

[0176] Table 11

[0177]

[0178] In this embodiment, the first side S3 and the second side S4 of the second lens L2 of the optical lens are aspherical mirror surfaces. The surface profiles of the aspherical mirror surfaces can be defined by, but are not limited to, the formula (1) given in the above Example 1.

[0179] Table 12 shows the conic coefficient (k) and higher-order term coefficients that can be used for the aspherical mirror surfaces in this embodiment A4 , A6 , A8 , A10 , A12 , A14 and A16 .

[0180] Table 12

[0181]

[0182] Example 7

[0183] The following refers to Figure 7 to describe the optical lens according to Embodiment 7 of the present application.

[0184] As Figure 7 shown, the optical lens sequentially includes a first lens L1, a second lens L2, a diaphragm STO, a third lens L3, a fourth lens L4, and a fifth lens L5 along the optical axis from the first side to the second side. Among them, the third lens L3 and the fourth lens L4 form a cemented lens.

[0185] The first lens L1 has a negative focal power, with its first side S1 being convex and its second side S2 being concave. The second lens L2 has a negative focal power, with its first side S3 being concave and its second side S4 being convex. The third lens L3 has a negative focal power, with its first side S5 being concave and its second side S6 being concave. The fourth lens L4 has a positive focal power, with its first side S6 being convex and its second side S7 being convex. The fifth lens L5 has a positive focal power, with its first side S8 being convex and its second side S9 being convex.

[0186] Table 13 shows the radius of curvature R, thickness / distance, refractive index Nd, and dispersion coefficient Vd of each lens of the optical lens of Example 7.

[0187] Table 13

[0188]

[0189] In this embodiment, the first side S3 and the second side S4 of the second lens L2 of the optical lens are aspherical mirror surfaces, and the surface profiles of the aspherical mirror surfaces can be defined by, but are not limited to, the formula (1) given in the above Example 1.

[0190] Table 14 shows the conic coefficient (k) and higher-order term coefficients that can be used for the aspherical mirror surfaces in this embodiment A4 、 A6 、 A8 、 A10 、 A12 、 A14 and A16 。

[0191] Table 14

[0192]

[0193] Example 8

[0194] The following refers to Figure 8 to describe the optical lens according to Embodiment 8 of the present application.

[0195] As Figure 8 shown, the optical lens sequentially includes a first lens L1, a second lens L2, a diaphragm STO, a third lens L3, a fourth lens L4, and a fifth lens L5 along the optical axis from the first side to the second side. Among them, the third lens L3 and the fourth lens L4 form a cemented lens.

[0196] The first lens L1 has a negative focal power, its first side S1 is convex, and its second side S2 is concave. The second lens L2 has a negative focal power, its first side S3 is concave, and its second side S4 is convex. The third lens L3 has a negative focal power, its first side S5 is concave, and its second side S6 is concave. The fourth lens L4 has a positive focal power, its first side S6 is convex, and its second side S7 is convex. The fifth lens L5 has a positive focal power, its first side S8 is convex, and its second side S9 is convex.

[0197] Table 15 shows the radius of curvature R, thickness / distance, refractive index Nd, and dispersion coefficient Vd of each lens of the optical lens of Example 8.

[0198] Table 15

[0199]

[0200] In this embodiment, the first side S3 and the second side S4 of the second lens L2 of the optical lens are aspherical mirror surfaces, and the surface profiles of the aspherical mirror surfaces can be defined by, but are not limited to, the formula (1) given in the above Example 1.

[0201] Table 16 shows the conic coefficient (k) and higher-order term coefficients that can be used for the aspherical mirror surfaces in this embodiment A4 , A6 , A8 , A10 , A12 , A14 and A16 .

[0202] Table 16

[0203]

[0204] Example 9

[0205] The following refers to Figure 9 to describe the optical lens according to Embodiment 9 of the present application.

[0206] As Figure 9 shown, the optical lens sequentially includes a first lens L1, a second lens L2, a diaphragm STO, a third lens L3, a fourth lens L4, and a fifth lens L5 along the optical axis from the first side to the second side. Among them, the third lens L3 and the fourth lens L4 form a cemented lens.

[0207] The first lens L1 has a negative optical power, its first side S1 is convex, and its second side S2 is concave. The second lens L2 has a positive optical power, its first side S3 is concave, and its second side S4 is convex. The third lens L3 has a positive optical power, its first side S5 is convex, and its second side S6 is convex. The fourth lens L4 has a negative optical power, its first side S6 is concave, and its second side S7 is convex. The fifth lens L5 has a positive optical power, its first side S8 is convex, and its second side S9 is convex.

[0208] In this embodiment, the first side S9 of the fifth lens L5 has an aspherical curvature.

[0209] In this embodiment, the optical lens can be used as, for example, a projection lens or a lidar emission end lens. At this time, the light from the image source plane IMA (S10) sequentially passes through each optical surface S9 to S1 and is finally projected onto a projection plane (not shown) provided on the first side.

[0210] It should be understood that the optical lens provided in the present application can also be used as, for example, a vehicle-mounted lens. At this time, the light from the object sequentially passes through each optical surface S1 to S9 and is finally imaged on the imaging plane IMA provided on the second side, where an image sensing chip is provided at the imaging plane IMA.

[0211] Table 17 shows the radius of curvature R, thickness / distance, refractive index Nd, and dispersion coefficient Vd of each lens of the optical lens of Example 9.

[0212] Table 17

[0213]

[0214] In this embodiment, the first side S3 and the second side S4 of the second lens L2 of the optical lens, and the first side S8 and the second side S9 of the fifth lens L5 are aspherical mirror surfaces, and the surface profiles of each aspherical mirror surface can be defined by, but not limited to, the formula (1) given in the above Example 1.

[0215] Table 18 shows the conic coefficient (k) and higher-order term coefficients A4 , A6 , A8 , A10 , A12 , A14 and A16 .

[0216] Table 18

[0217]

[0218] Example 10

[0219] The following reference is made to Figure 10Describe the optical lens according to Embodiment 10 of the present application.

[0220] As Figure 10 shown, the optical lens sequentially includes a first lens L1, a second lens L2, a stop STO, a third lens L3, a fourth lens L4, and a fifth lens L5 along the optical axis from the first side to the second side. Among them, the third lens L3 and the fourth lens L4 form a cemented lens.

[0221] The first lens L1 has a negative focal power, its first side S1 is convex, and its second side S2 is concave. The second lens L2 has a positive focal power, its first side S3 is concave, and its second side S4 is convex. The third lens L3 has a positive focal power, its first side S5 is convex, and its second side S6 is convex. The fourth lens L4 has a negative focal power, its first side S6 is concave, and its second side S7 is convex. The fifth lens L5 has a positive focal power, its first side S8 is convex, and its second side S9 is convex.

[0222] In this embodiment, the first side S9 of the fifth lens L5 has an aspherical curve.

[0223] In this embodiment, the optical lens can be used as, for example, a projection lens or a lidar transmitter lens. At this time, the light from the image source plane IMA (S10) sequentially passes through each optical surface S9 to S1 and is finally projected onto a projection plane (not shown) provided on the first side.

[0224] It should be understood that the optical lens provided by the present application can also be used as, for example, a vehicle-mounted lens. At this time, the light from the object sequentially passes through each optical surface S1 to S9 and is finally imaged on the imaging plane IMA provided on the second side, where an image sensor chip is provided at the imaging plane IMA.

[0225] Table 19 shows the curvature radius R, thickness / distance, refractive index Nd, and dispersion coefficient Vd of each lens of the optical lens of Embodiment 10.

[0226] Table 19

[0227]

[0228] In this embodiment, the first side S3 and the second side S4 of the second lens L2 of the optical lens, and the first side S8 and the second side S9 of the fifth lens L5 are aspherical mirror surfaces, and the surface profiles of each aspherical mirror surface can be defined by, but not limited to, the formula (1) given in Embodiment 1 above.

[0229] Table 20 shows the conic coefficient (k) and higher-order term coefficients that can be used for the aspherical mirror surfaces in this embodiment A4 , A6 , A8 , A10 ,A12 , A14 and A16 。

[0230] Table 20

[0231]

[0232] Example 11

[0233] The following refers to Figure 11 to describe an optical lens according to Example 11 of the present application.

[0234] As Figure 11 shown, the optical lens sequentially includes a first lens L1, a second lens L2, a stop STO, a third lens L3, a fourth lens L4, and a fifth lens L5 along the optical axis from the first side to the second side. Among them, the third lens L3 and the fourth lens L4 form a cemented lens.

[0235] The first lens L1 has a negative optical power, its first side S1 is convex, and its second side S2 is concave. The second lens L2 has a positive optical power, its first side S3 is concave, and its second side S4 is convex. The third lens L3 has a negative optical power, its first side S5 is concave, and its second side S6 is concave. The fourth lens L4 has a positive optical power, its first side S6 is convex, and its second side S7 is convex. The fifth lens L5 has a positive optical power, its first side S8 is convex, and its second side S9 is flat.

[0236] Table 21 shows the radius of curvature R, thickness / distance, refractive index Nd, and dispersion coefficient Vd of each lens of the optical lens of Example 11.

[0237] Table 21

[0238]

[0239] In this embodiment, the first side S1 and the second side S2 of the first lens L1 of the optical lens, and the first side S3 and the second side S4 of the second lens L2 are aspherical mirrors, and the surface profiles of the aspherical mirrors can be defined by, but are not limited to, the formula (1) given in Example 1 above.

[0240] Table 22 shows the conic coefficient (k) and higher-order term coefficients that can be used for the aspherical mirrors in this embodiment A4 , A6 , A8 , A10 , A12 , A14 and A16 。

[0241] Table 22

[0242]

[0243] Example 12

[0244] The following is a reference to Figure 12 describe the optical lens according to Example 12 of the present application.

[0245] As Figure 12 shown, the optical lens sequentially includes a first lens L1, a second lens L2, a stop STO, a third lens L3, a fourth lens L4, and a fifth lens L5 along the optical axis from the first side to the second side. Among them, the third lens L3 and the fourth lens L4 form a cemented lens.

[0246] The first lens L1 has a negative focal power, its first side S1 is a convex surface, and its second side S2 is a concave surface. The second lens L2 has a positive focal power, its first side S3 is a concave surface, and its second side S4 is a convex surface. The third lens L3 has a negative focal power, its first side S5 is a concave surface, and its second side S6 is a concave surface. The fourth lens L4 has a positive focal power, its first side S6 is a convex surface, and its second side S7 is a convex surface. The fifth lens L5 has a positive focal power, its first side S8 is a convex surface, and its second side S9 is a flat surface.

[0247] Table 23 shows the radius of curvature R, thickness / distance, refractive index Nd, and dispersion coefficient Vd of each lens of the optical lens of Example 12.

[0248] Table 23

[0249]

[0250] In this embodiment, the first side S1 and the second side S2 of the first lens L1 of the optical lens, and the first side S3 and the second side S4 of the second lens L2 are aspherical mirror surfaces, and the surface types of the aspherical mirror surfaces can be defined by, but not limited to, the formula (1) given in the above Example 1.

[0251] Table 24 shows the conic coefficient (k) and higher-order term coefficients that can be used for the aspherical mirror surfaces in this embodiment A4 , A6 , A8 , A10 , A12 , A14 and A16 .

[0252] Table 24

[0253]

[0254] Example 13

[0255] The following is a reference to Figure 13 describe the optical lens according to Example 13 of the present application.

[0256] As Figure 13As shown in the figure, the optical lens sequentially includes a first lens L1, a second lens L2, a stop STO, a third lens L3, a fourth lens L4, and a fifth lens L5 along the optical axis from the first side to the second side. Among them, the third lens L3 and the fourth lens L4 form a cemented lens.

[0257] The first lens L1 has a negative focal power. Its first side S1 is a convex surface, and its second side S2 is a concave surface. The second lens L2 has a positive focal power. Its first side S3 is a concave surface, and its second side S4 is a convex surface. The third lens L3 has a negative focal power. Its first side S5 is a concave surface, and its second side S6 is a concave surface. The fourth lens L4 has a positive focal power. Its first side S6 is a convex surface, and its second side S7 is a convex surface. The fifth lens L5 has a positive focal power. Its first side S8 is a convex surface, and its second side S9 is a concave surface.

[0258] Table 25 shows the radius of curvature R, thickness / distance, refractive index Nd, and dispersion coefficient Vd of each lens of the optical lens of Example 13.

[0259] Table 25

[0260]

[0261] In this embodiment, the first side S1 and the second side S2 of the first lens L1 of the optical lens, and the first side S3 and the second side S4 of the second lens L2 are aspherical surfaces. The surface profiles of the aspherical surfaces can be defined by, but are not limited to, the formula (1) given in the above Example 1.

[0262] Table 26 shows the conic coefficient (k) and high-order term coefficients A4 , A6 , A8 , A10 , A12 , A14 and A16 .

[0263] Table 26

[0264]

[0265] Example 14

[0266] The following refers to Figure 14 to describe the optical lens according to Embodiment 14 of the present application.

[0267] As Figure 14 shown, the optical lens sequentially includes a first lens L1, a second lens L2, a stop STO, a third lens L3, a fourth lens L4, and a fifth lens L5 along the optical axis from the first side to the second side. Among them, the third lens L3 and the fourth lens L4 form a cemented lens.

[0268] The first lens L1 has a negative focal power, its first side S1 is convex, and its second side S2 is concave. The second lens L2 has a positive focal power, its first side S3 is concave, and its second side S4 is convex. The third lens L3 has a negative focal power, its first side S5 is concave, and its second side S6 is concave. The fourth lens L4 has a positive focal power, its first side S6 is convex, and its second side S7 is convex. The fifth lens L5 has a positive focal power, its first side S8 is convex, and its second side S9 is concave.

[0269] Table 27 shows the radius of curvature R, thickness / distance, refractive index Nd, and dispersion coefficient Vd of each lens of the optical lens of Example 14.

[0270] Table 27

[0271]

[0272] In this embodiment, the first side S1 and the second side S2 of the first lens L1 of the optical lens, and the first side S3 and the second side S4 of the second lens L2 are aspherical mirror surfaces. The surface profiles of the aspherical mirror surfaces can be defined by, but are not limited to, the formula (1) given in the above Example 1.

[0273] Table 28 shows the conic coefficient (k) and higher-order term coefficients that can be used for the aspherical mirror surfaces in this embodiment A4 、 A6 、 A8 、 A10 、 A12 、 A14 and A16 。

[0274] Table 28

[0275]

[0276] Example 15

[0277] The following refers to Figure 15 to describe the optical lens according to Embodiment 15 of the present application.

[0278] As Figure 15 shown, the optical lens sequentially includes a first lens L1, a second lens L2, a diaphragm STO, a third lens L3, a fourth lens L4, and a fifth lens L5 along the optical axis from the first side to the second side. Among them, the third lens L3 and the fourth lens L4 form a cemented lens.

[0279] The first lens L1 has a negative focal power. Its first side S1 is convex, and its second side S2 is concave. The second lens L2 has a positive focal power. Its first side S3 is concave, and its second side S4 is convex. The third lens L3 has a negative focal power. Its first side S5 is convex, and its second side S6 is concave. The fourth lens L4 has a positive focal power. Its first side S6 is convex, and its second side S7 is convex. The fifth lens L5 has a positive focal power. Its first side S8 is flat, and its second side S9 is convex.

[0280] In this embodiment, the first side S1 of the first lens L1 has an aspherical curvature.

[0281] Table 29 shows the radius of curvature R, thickness / distance, refractive index Nd, and dispersion coefficient Vd of each lens of the optical lens of Embodiment 11.

[0282] Table 29

[0283]

[0284] In this embodiment, the first side S1 and the second side S2 of the first lens L1 of the optical lens, and the first side S3 and the second side S4 of the second lens L2 are aspherical mirror surfaces. The surface profiles of the aspherical mirror surfaces can be defined by, but are not limited to, the formula (1) given in Embodiment 1 above.

[0285] Table 30 shows the conic coefficient (k) and higher-order term coefficients that can be used for the aspherical mirror surfaces in this embodiment A4 , A6 , A8 , A10 , A12 , A14 and A16 .

[0286] Table 30

[0287]

[0288] Embodiment 16

[0289] The following refers to Figure 16 to describe the optical lens according to Embodiment 16 of the present application.

[0290] As Figure 16 shown, the optical lens sequentially includes a first lens L1, a second lens L2, a diaphragm STO, a third lens L3, a fourth lens L4, and a fifth lens L5 along the optical axis from the first side to the second side. Among them, the third lens L3 and the fourth lens L4 form a cemented lens.

[0291] The first lens L1 has a negative focal power, its first side S1 is convex, and its second side S2 is concave. The second lens L2 has a positive focal power, its first side S3 is concave, and its second side S4 is convex. The third lens L3 has a negative focal power, its first side S5 is convex, and its second side S6 is concave. The fourth lens L4 has a positive focal power, its first side S6 is convex, and its second side S7 is convex. The fifth lens L5 has a positive focal power, its first side S8 is flat, and its second side S9 is convex.

[0292] In this embodiment, the first side S1 of the first lens L1 has an aspherical curvature.

[0293] Table 31 shows the radius of curvature R, thickness / distance, refractive index Nd, and dispersion coefficient Vd of each lens of the optical lens of Embodiment 16.

[0294] Table 31

[0295]

[0296] In this embodiment, the first side S1 and the second side S2 of the first lens L1 of the optical lens, and the first side S3 and the second side S4 of the second lens L2 are aspherical mirror surfaces, and the surface profiles of the aspherical mirror surfaces can be defined by, but are not limited to, the formula (1) given in Embodiment 1 above.

[0297] Table 32 shows the conic coefficient (k) and higher-order term coefficients that can be used for the aspherical mirror surfaces in this embodiment A4 , A6 , A8 , A10 , A12 , A14 and A16 .

[0298] Table 32

[0299]

[0300] Embodiment 17

[0301] The following is a reference to Figure 17 describe the optical lens according to Embodiment 17 of the present application.

[0302] As Figure 17 shown, the optical lens sequentially includes a first lens L1, a second lens L2, a diaphragm STO, a third lens L3, a fourth lens L4, and a fifth lens L5 along the optical axis from the first side to the second side. Among them, the third lens L3 and the fourth lens L4 form a cemented lens.

[0303] The first lens L1 has a negative optical power, its first side S1 is convex, and its second side S2 is concave. The second lens L2 has a positive optical power, its first side S3 is concave, and its second side S4 is convex. The third lens L3 has a negative optical power, its first side S5 is convex, and its second side S6 is concave. The fourth lens L4 has a positive optical power, its first side S6 is convex, and its second side S7 is convex. The fifth lens L5 has a positive optical power, its first side S8 is concave, and its second side S9 is convex.

[0304] Table 33 shows the radius of curvature R, thickness / distance, refractive index Nd, and dispersion coefficient Vd of each lens of the optical lens of Example 17.

[0305] Table 33

[0306]

[0307] In this embodiment, the first side S1 and the second side S2 of the first lens L1 of the optical lens, and the first side S3 and the second side S4 of the second lens L2 are aspherical mirror surfaces. The surface profiles of the aspherical mirror surfaces can be defined by, but are not limited to, the formula (1) given in the above Example 1.

[0308] Table 34 shows the conic coefficient (k) and higher-order term coefficients that can be used for the aspherical mirror surfaces in this embodiment A4 , A6 , A8 , A10 , A12 , A14 and A16 .

[0309] Table 34

[0310]

[0311] Example 18

[0312] The following refers to Figure 18 to describe the optical lens according to Embodiment 18 of the present application.

[0313] As Figure 18 shown, the optical lens sequentially includes a first lens L1, a second lens L2, a diaphragm STO, a third lens L3, a fourth lens L4, and a fifth lens L5 along the optical axis from the first side to the second side. Among them, the third lens L3 and the fourth lens L4 form a cemented lens.

[0314] The first lens L1 has a negative optical power, its first side S1 is convex, and its second side S2 is concave. The second lens L2 has a positive optical power, its first side S3 is concave, and its second side S4 is convex. The third lens L3 has a negative optical power, its first side S5 is convex, and its second side S6 is concave. The fourth lens L4 has a positive optical power, its first side S6 is convex, and its second side S7 is convex. The fifth lens L5 has a positive optical power, its first side S8 is concave, and its second side S9 is convex.

[0315] In this embodiment, the first side S1 of the first lens L1 has an anastigmatism.

[0316] Table 35 shows the radius of curvature R, thickness / distance, refractive index Nd, and dispersion coefficient Vd of each lens of the optical lens of Embodiment 18.

[0317] Table 35

[0318]

[0319] In this embodiment, the first side S1 and the second side S2 of the first lens L1 of the optical lens, and the first side S3 and the second side S4 of the second lens L2 are aspherical mirror surfaces. The surface profiles of the aspherical mirror surfaces can be defined by, but are not limited to, the formula (1) given in Embodiment 1 above.

[0320] Table 36 shows the conic coefficient (k) and higher-order term coefficients that can be used for the aspherical mirror surfaces in this embodiment A4 , A6 , A8 , A10 , A12 , A14 and A16 .

[0321] Table 36

[0322]

[0323] Embodiment 19

[0324] The following refers to Figure 19 to describe the optical lens according to Embodiment 19 of the present application.

[0325] As Figure 19 shown, the optical lens sequentially includes a first lens L1, a second lens L2, a diaphragm STO, a third lens L3, a fourth lens L4, and a fifth lens L5 along the optical axis from the first side to the second side. Among them, the third lens L3 and the fourth lens L4 form a cemented lens.

[0326] The first lens L1 has a negative optical power, with its first side S1 being convex and its second side S2 being concave. The second lens L2 has a positive optical power, with its first side S3 being concave and its second side S4 being convex. The third lens L3 has a negative optical power, with its first side S5 being planar and its second side S6 being concave. The fourth lens L4 has a positive optical power, with its first side S6 being convex and its second side S7 being convex. The fifth lens L5 has a positive optical power, with its first side S8 being convex and its second side S9 being convex.

[0327] Table 37 shows the radius of curvature R, thickness / distance, refractive index Nd, and dispersion coefficient Vd of each lens of the optical lens of Example 19.

[0328] Table 37

[0329]

[0330] In this embodiment, the first side S3 and the second side S4 of the second lens L2 of the optical lens are aspherical mirror surfaces, and the surface profiles of the aspherical mirror surfaces can be defined by, but are not limited to, the formula (1) given in the above Example 1.

[0331] Table 38 shows the conic coefficient (k) and higher-order term coefficients that can be used for the aspherical mirror surfaces in this embodiment A4 、 A6 、 A8 、 A10 、 A12 、 A14 and A16 。

[0332] Table 38

[0333]

[0334] Example 20

[0335] The following refers to Figure 20 to describe the optical lens according to Embodiment 20 of the present application.

[0336] As Figure 20 shown, the optical lens sequentially includes a first lens L1, a second lens L2, a diaphragm STO, a third lens L3, a fourth lens L4, and a fifth lens L5 along the optical axis from the first side to the second side.

[0337] The first lens L1 has a negative optical power, its first side S1 is convex, and its second side S2 is concave. The second lens L2 has a positive optical power, its first side S3 is concave, and its second side S4 is convex. The third lens L3 has a negative optical power, its first side S5 is concave, and its second side S6-1 is concave. The fourth lens L4 has a positive optical power, its first side S6-2 is convex, and its second side S7 is convex. The fifth lens L5 has a positive optical power, its first side S8 is convex, and its second side S9 is convex.

[0338] Table 39 shows the radius of curvature R, thickness / distance, refractive index Nd, and dispersion coefficient Vd of each lens of the optical lens according to Example 20.

[0339] Table 39

[0340]

[0341] In this embodiment, the first side S3 and the second side S4 of the second lens L2 of the optical lens are aspherical surfaces, and the surface profiles of the aspherical surfaces can be defined by, but not limited to, the formula (1) given in the above Example 1.

[0342] Table 40 shows the conic coefficient (k) and higher-order term coefficients that can be used for the aspherical surfaces in this embodiment A4 , A6 , A8 , A10 , A12 , A14 and A16 .

[0343] Table 40

[0344]

[0345] Example 21

[0346] The following refers to Figure 21 to describe the optical lens according to Embodiment 21 of the present application.

[0347] As Figure 21 shown, the optical lens sequentially includes a first lens L1, a second lens L2, a diaphragm STO, a third lens L3, a fourth lens L4, and a fifth lens L5 along the optical axis from the first side to the second side. Among them, the third lens L3 and the fourth lens L4 form a cemented lens.

[0348] The first lens L1 has a negative optical power, its first side S1 is convex, and its second side S2 is concave. The second lens L2 has a negative optical power, its first side S3 is concave, and its second side S4 is convex. The third lens L3 has a positive optical power, its first side S5 is convex, and its second side S6 is convex. The fourth lens L4 has a negative optical power, its first side S6 is concave, and its second side S7 is convex. The fifth lens L5 has a positive optical power, its first side S8 is convex, and its second side S9 is convex.

[0349] In this embodiment, the optical lens can be used as, for example, a projection lens or a lidar transmitter lens. At this time, the light from the image source plane IMA (S10) sequentially passes through each optical surface S9 to S1 and is finally projected onto a projection plane (not shown) provided on the first side.

[0350] It should be understood that the optical lens provided in the present application can also be used as, for example, a vehicle-mounted lens. At this time, the light from the object sequentially passes through each optical surface S1 to S9 and is finally imaged on the imaging plane IMA provided on the second side, where an image sensing chip is provided at the imaging plane IMA.

[0351] Table 41 shows the radius of curvature R, thickness / distance, refractive index Nd, and dispersion coefficient Vd of each lens of the optical lens of Embodiment 21.

[0352] Table 41

[0353]

[0354] In this embodiment, the first side S3 and the second side S4 of the second lens L2 of the optical lens, and the first side S8 and the second side S9 of the fifth lens L5 are aspherical mirror surfaces, and the surface profiles of the aspherical mirror surfaces can be defined by, but not limited to, the formula (1) given in the above Embodiment 1.

[0355] Table 42 shows the conic coefficient (k) and higher-order term coefficients that can be used for the aspherical mirror surfaces in this embodiment A4 、 A6 、 A8 、 A10 、 A12 、 A14 and A16 。

[0356] Table 42

[0357]

[0358] Table 43 and Table 44 respectively show some parameters of the optical lenses in the above-described Embodiment 1 to Embodiment 10, and Embodiment 11 to Embodiment 21, such as the focal length F of the optical lens, the optical power φ, the entrance pupil diameter ENPD, the total optical length TTL, the maximum field of view FOV, the radian value θ corresponding to the maximum field of view, and the focal length values of each lens, etc. Among them, the units of each focal length value, distance or effective radius value are all millimeters (mm), and the unit of FOV is degrees (°).

[0359] Table 43

[0360]

[0361] Table 44

[0362]

[0363] In summary, the optical lenses in the above-described Embodiment 1 to Embodiment 10 respectively satisfy the conditional expressions shown in Table 45 below, and the optical lenses in Embodiment 11 to Embodiment 21 respectively satisfy the conditional expressions shown in Table 46 below.

[0364] Table 45

[0365]

[0366] Table 46

[0367]

[0368] Figure 22 shows the MTF (Modulation Transfer Function) curve of the optical lens according to the embodiment of the present application. It can be seen from Figure 22 that the optical lens has good contrast within the spatial frequency of 60 lp / mm (cycles / mm) and the imaging is clear. Therefore, the optical lens according to the embodiment of the present application has high resolution ability and can achieve good imaging quality.

[0369] The present application also provides an electronic device, which may include an optical lens according to the above-described embodiment of the present application and an imaging element for converting the optical image formed by the optical lens into an electrical signal. The electronic device may be an independent electronic device such as a distance detection camera, or an imaging module integrated on a distance detection device such as. In addition, the electronic device may also be an independent imaging device such as a vehicle-mounted camera, or an imaging module integrated on an auxiliary driving system such as.

[0370] In addition, the present application also provides an electronic device, which may include an optical lens and a light source according to the above embodiments of the present application. The light source may be located on the second side of the optical lens, and the light emitted by the light source is projected to the first side of the optical lens after passing through the optical lens, forming an image or an illuminated area on the first side. The electronic device may be an emission / projection / projecting lens, and the light from the light source side is projected to the object side after passing through the optical lens, forming an image or an illuminated area on the object side.

[0371] The above description is only a preferred embodiment of the present application and an explanation of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the technical solution formed by mutually replacing the above features with the technical features (but not limited to) having similar functions disclosed in the present application.

Claims

1. An optical lens, characterized in that: The optical lens includes, in sequence from the first side to the second side along the optical axis: A first lens having negative optical power, wherein the second side surface of the first lens is concave; a second lens having optical power, wherein the first side surface is concave and the second side surface is convex; a third lens having optical power; a fourth lens element having optical power, wherein the second side surface of the fourth lens element is convex; and a fifth lens having positive refractive power; Wherein, the number of lenses having optical power in the optical lens is five; The third lens has opposite optical power to the fourth lens; An air interval T23 between the second lens and the third lens on the optical axis and a distance TL from the first side surface of the first lens to the second side surface of the fifth lens on the optical axis satisfy: 0.25≤T23 / TL≤0.9; The focal length F1 of the first lens and the focal length F of the optical lens satisfy: -8≤F1 / F≤-0.5; The curvature radius R3 of the first side surface of the second lens, the curvature radius R4 of the second side surface of the second lens, and the center thickness d3 of the second lens satisfy: 0.5≤R4 / (R3-d3)≤1.2; The focal length F of the optical lens and the image height H corresponding to the maximum field angle of the optical lens satisfy the following: 1.3≤F / H≤2.

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

3. The optical lens according to claim 1, characterized in that: The second lens has positive refractive power or negative refractive power.

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

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

6. The optical lens according to claim 1, characterized in that: The fourth lens has positive optical power, and its first side surface is convex; or the fourth lens has negative optical power, and its first side surface is concave.

7. The optical lens according to claim 1, characterized in that: The first side surface of the fifth lens is convex, and the second side surface is convex; or the first side surface is convex, and the second side surface is flat; or the first side surface is convex, and the second side surface is concave; or the first side surface is flat, and the second side surface is convex; or the first side surface is concave, and the second side surface is convex.

8. The optical lens according to any one of claims 1 to 7, characterized in that: The maximum field of view FOV of the optical lens, the focal length F of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following conditions: 45°≤(FOV F) / H≤60°.

9. The optical lens according to any one of claims 1 to 7, characterized in that: The optical lens meets at least one of the following conditions: 4≤TTL / F≤6.5; 0.35≤(F θ) / D≤0.8; 0.02≤D / H / FOV×1°≤0.08; 1.5≤D / H / θ≤5; 0.05≤D / H / F×1mm≤0.2; 0.1≤TTL / H / FOV×1°≤0.8; 10≤TTL / H / θ≤25; 2≤TTL / DMAX≤6; Among them, TTL is the total optical length of the optical lens, F is the focal length of the optical lens, θ is the radian value corresponding to the maximum field of view angle of the optical lens, D is the maximum light clearance aperture of the first side surface of the first lens, H is the image height corresponding to the maximum field of view angle of the optical lens, FOV is the maximum field of view angle of the optical lens, and DMAX is the maximum value of the maximum light clearance apertures of each optical surface of the first lens to the fifth lens.

10. The optical lens according to any one of claims 1 to 7, characterized in that: The back focal length BFL of the optical lens and the total optical length TTL of the optical lens satisfy: 0.3≤BFL / TTL≤0.4381.

11. The optical lens according to any one of claims 1 to 7, characterized in that: The combined optical power of the third lens, the fourth lens and the fifth lens 3-5 with the optical focal length of the optical lens Satisfaction: 0.1≤ 3-5 / ≤0.

8.

12. The optical lens according to any one of claims 1 to 7, characterized in that: A distance d6-9 from the first side surface of the third lens to the second side surface of the fifth lens on the optical axis and a distance TL from the first side surface of the first lens to the second side surface of the fifth lens on the optical axis satisfy: 0.227≤d6-9 / TL≤0.36; An air interval d8 between the fourth lens and the fifth lens on the optical axis and a distance TL from the first side surface of the first lens to the second side surface of the fifth lens on the optical axis satisfy: 0.002≤d8 / TL≤0.

01.

13. The optical lens according to any one of claims 1 to 7, characterized in that: The maximum aperture D9 of the first side surface of the fifth lens, the back focal length BFL of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens satisfy: 42mm≤D9 BFL / H≤98mm.

14. The optical lens according to any one of claims 1 to 7, characterized in that: The focal length F2 of the second lens and the focal length F of the optical lens satisfy: 8≤ F2 / F ≤532.6352.

15. The optical lens according to any one of claims 1 to 7, characterized in that: The curvature radius R3 of the first side surface of the second lens and the focal length F of the optical lens satisfy: -5≤R3 / F≤-0.

2.

16. The optical lens according to any one of claims 1 to 7, characterized in that: A curvature radius R2 of the second side surface of the first lens and a curvature radius R3 of the first side surface of the second lens satisfy: -2.5≤R2 / R3≤-0.

25.

17. The optical lens according to any one of claims 1 to 7, characterized in that: The focal length F1 of the first lens and the combined focal length F345 of the third lens, the fourth lens and the fifth lens satisfy: -5≤F1 / F345≤-0.

3.

18. The optical lens according to any one of claims 1 to 7, characterized in that: The minimum focal length Fmin and the maximum focal length Fmax among the focal lengths of the third lens, the fourth lens and the fifth lens satisfy: 0.55≤ Fmin / Fmax ≤1.

3.

19. The optical lens according to any one of claims 1 to 7, characterized in that: The focal length F5 of the fifth lens and the focal length F of the optical lens satisfy: 1≤F5 / F≤4.

5.

20. The optical lens according to any one of claims 1 to 7, characterized in that: A curvature radius R8 of the second side surface of the fourth lens and a focal length F5 of the fifth lens satisfy: -8≤R8 / F5≤0.

21. The optical lens according to any one of claims 1 to 7, characterized in that: An air interval d2 between the first lens and the second lens on the optical axis and a distance TL from the first side surface of the first lens to the second side surface of the fifth lens on the optical axis satisfy: 0.06≤d2 / TL≤0.

24.

22. The optical lens according to any one of claims 1 to 7, characterized in that: The curvature radius R2 of the second side surface of the first lens and the focal length F2 of the second lens satisfy: R2 / F2 ≤0.

08.

23. The optical lens according to any one of claims 1 to 7, characterized in that: The optical lens meets at least one of the following conditions: 50mm≤D9 BFL / H≤98mm; -6≤F1 / F≤-1; -4≤F1 / F345≤-0.5; -4≤R8 / F5≤-0.15; Among them, D9 is the maximum clear aperture of the first side surface of the fifth lens, BFL is the back focal length of the optical lens, F1 is the focal length of the first lens, F is the focal length of the optical lens, F345 is the combined focal length of the third lens, the fourth lens and the fifth lens, R8 is the curvature radius of the second side surface of the fourth lens, and F5 is the focal length of the fifth lens.

24. The optical lens according to any one of claims 1 to 7, characterized in that: The optical lens further comprises an aperture, and the aperture is located between the second lens and the third lens; The optical lens satisfies at least one of the following conditions: 56.2511°≤(FOV F) / H≤58.8244°; 4.4942≤TTL / F≤5.5504; 0.1989≤TTL / H / FOV×1°≤0.3315; 11.3940≤TTL / H / θ≤18.9925; 3.2265≤TTL / DMAX≤3.8385; 0.5718≤(F θ) / D≤0.6597; 0.0394≤D / H / FOV×1°≤0.0569; 2.2598≤D / H / θ≤3.2576; 0.08 41≤D / H / F×1mm≤0.1249; 0.3614≤BFL / TTL≤0.4381; 0.5659≤BFL / TL≤0.779 6; 1.4622≤F / H≤1.8644; 1.9≤F / ENPD≤2.6; 1.9≤F / ENPD≤2; 0.1205≤F / ENPD / D×1mm≤0.1418; 0.7882≤DST / F≤0.9931; 0.3719≤T23 / TL≤0.5393; 0.2062≤ 3-5 / ≤0.7320; 0.2270≤d6-9 / TL≤0.3466; 0.1424≤d6-9 / TTL≤0.2168; 0.0021≤d8 / TL≤0.0066; 0.0013≤d8 / TTL≤0.0037; 59.9683mm≤D9 BFL / H≤89.3136mm;-5.0309≤F1 / F≤-1.9868;9.0798≤ F2 / F 0.7310≤ Fmin / Fmax ≤1.2246; 1.5514≤F5 / F≤3.3634; -2.6067≤R8 / F5≤-0.4014; 0.0997≤d2 / TL≤0.1928; 0.0011≤ R2 / F2 ≤0.0713, wherein FOV is the maximum field of view of the optical lens, F is the focal length of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, TTL is the total optical length of the optical lens, θ is the arc value corresponding to the maximum field of view of the optical lens, D is the maximum clear aperture of the first side surface of the first lens, DMAX is the maximum value of the maximum clear apertures of each optical surface from the first lens to the fifth lens, BFL is the back focal length of the optical lens, TL is the distance from the first side surface of the first lens to the second side surface of the fifth lens on the optical axis, ENPD is the entrance pupil diameter of the optical lens, DST is the aperture diameter of the aperture, and T23 is the air spacing between the second lens and the third lens on the optical axis. 3-5 is the combined optical power of the third lens, the fourth lens and the fifth lens, is the focal power of the optical lens, d6-9 is the distance from the first side surface of the third lens to the second side surface of the fifth lens on the optical axis, d8 is the air spacing between the fourth lens and the fifth lens on the optical axis, D9 is the maximum clear aperture of the first side surface of the fifth lens, F1 is the focal length of the first lens, F2 is the focal length of the second lens, F5 is the focal length of the fifth lens, F345 is the combined focal length of the third lens, the fourth lens and the fifth lens, Fmin is the minimum focal length among the focal lengths of the third lens, the fourth lens and the fifth lens, Fmax is the maximum focal length among the focal lengths of the third lens, the fourth lens and the fifth lens, R2 is the curvature radius of the second side surface of the first lens, R3 is the curvature radius of the first side surface of the second lens, R4 is the curvature radius of the second side surface of the second lens, R8 is the curvature radius of the second side surface of the fourth lens, d2 is the air spacing between the first lens and the second lens on the optical axis, and d3 is the center thickness of the second lens.

25. An electronic device, characterized in that: The optical lens according to any one of claims 1 to 24, further comprising at least one of the following: An imaging element, used for converting an optical image or optical information formed by the optical lens into an electrical signal, wherein the imaging element is located on the second side of the optical lens, and light from the first side of the optical lens forms an image on the second side after passing through the optical lens; or A light source is located on the second side of the optical lens, and light emitted by the light source is projected onto the first side of the optical lens after passing through the optical lens, thereby forming an image or illuminating an area on the first side.

Images