Optical lens and electronic equipment

Abstract

The invention discloses an optical lens and electronic equipment. The optical lens sequentially comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens from a first side to a second side along an optical axis, the first side surface of the second lens is a concave surface, and the second side surface of the second lens is a convex surface; the third lens has focal power; the fourth lens has focal power, and the second side surface of the fourth lens is a convex surface; the fifth lens has positive focal power; wherein the number of lenses with focal power in the optical lens is five; the optical lens satisfies the following conditions: 0.25 < = T23 / TL < = 0.9; -8 < = F1 / F < =-0.5; and 0.5 < = R4 / (R3-d3) < = 1.2.

Description

Technical Field

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

[0002] In recent years, with the rapid development of automobile assisted driving technology, optical lenses are used more and more widely in automobiles, such as vehicle-mounted optical lenses or projection lenses.

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

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

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

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

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

[0008] In some embodiments, 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.

[0009] In some embodiments, the third lens has positive optical power, a first side surface thereof is convex, and a second side surface thereof is convex.

[0010] In some embodiments, 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.

[0011] In some embodiments, the first side surface of the fifth lens is convex, and the second side surface is convex; or its first side surface is convex, and the second side surface is flat; or its first side surface is convex, and the second side surface is concave; or its first side surface is flat, and the second side surface is convex; or its first side surface is concave, and the second side surface 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; wherein, 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 of the optical lens, D is the maximum clear aperture of the first side surface 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 of the maximum clear apertures of each optical surface of the first lens to the fifth lens.

[0014] In some embodiments, the back focal length BFL of the optical lens and the total optical length TTL of the optical lens meet the following relationship: 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 angle 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, a 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 a 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; an air gap d8 on the optical axis between the fourth lens and the fifth lens and a 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 angle of the optical lens satisfy: D9 BFL / H≥42mm.

[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, a radius of curvature R2 of the second side surface of the first lens and a 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 lens, the fourth lens, and the fifth lens satisfy: -5≤F1 / F345≤-0.3.

[0023] In some embodiments, a minimum focal length Fmin and a 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, a radius of curvature R8 of the second side surface of the fourth lens and a focal length F5 of the fifth lens satisfy: -8≤R8 / F5≤0.

[0026] In some embodiments, 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.

[0027] In some embodiments, a radius of curvature R2 of the second side surface of the first lens and a focal length F of the second 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; wherein, 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.

[0029] In some embodiments, the optical lens further includes a stop, which 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 / E NPD / 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≤89.3136mm; -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, 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 of the first lens, DMAX is the maximum value of the maximum clear aperture of each optical surface from the first lens to the fifth lens, BFL is the back focal length of the optical lens, and TL is the first d6-9 is the distance from the first side of the third lens to the second side 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 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, and F5 is the focal length of the fifth lens. wherein: F345 is the focal length of the third lens, the fourth lens and the fifth lens combined focal length, 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 surface of the first lens, 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, R8 is the radius of curvature 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.

[0030] The present application further provides an electronic device. The electronic device includes the optical lens provided by the present application, and also includes at least one of the following: an imaging element, which is used to convert an optical image or optical information formed by the optical lens into an electrical signal, the imaging element is located on the second side of the optical lens, and the light from the first side of the optical lens is imaged on the second side after passing through the optical lens; or a light source, which is 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 illuminating an area on the first side.

[0031] The optical lens according to the embodiment of the present application includes five lenses with optical power, which are respectively a first lens to a fifth lens arranged in sequence from a first side to a second side along an optical axis. 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 air interval between the second lens and the third lens is controlled to be larger, which is conducive to the smooth transition of light and reduces the sensitivity of the lens, thereby facilitating the processing and molding 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 focal length 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 of view angle of the first lens after receiving a large viewing angle is appropriate, which is conducive to reducing sensitivity; the curvature radius R3 of the first side surface of the second lens and the curvature radius R4 of the second side surface and the center 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 trend of the second lens can be corrected to make the field of view angle entering the third lens small, the light is more stable, the sensitivity of the system is further reduced, and the resolution of the optical lens is improved.

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

[0033] Other features, purposes and advantages of the present utility model will become more apparent through the detailed description of the following embodiments in conjunction with the accompanying drawings. In the accompanying drawings: Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 , Fig.11 , Fig.12 , Fig.13 , Fig.14 , Fig.15 , Fig.16 , Fig.17 , Fig.18 , Fig.19 , Fig. 20 and Fig.21 The schematic diagrams of the structures of the optical lenses according to Embodiments 1 to 21 of the present application are respectively shown; Fig. 22 Schematic diagram of the MTF curve of the optical lens according to the embodiment of the present application. DETAILED DESCRIPTION

[0034] In order 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 exemplary embodiments of the present application, and do not limit the scope of the present application in any way. Throughout the specification, the same figure numbers refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0035] It should be noted that in this specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, without departing from the teaching of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0036] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for ease of explanation. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the drawings. The drawings are only examples and are not drawn strictly to scale.

[0037] In this article, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens 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.

[0038] It should be understood that the optical lens provided in the present application can be used for both video recording and projection. When the optical lens provided in the present application is used for a video recording lens, the "first side" referred to in this article may refer to the object side, and the "second side" may refer to the image side; when the optical lens provided in the present application is used for an optical lens or a radar transmitting lens, the "first side" referred to in this article may refer to the imaging side, and the "second side" may refer to the image source side.

[0039] It should also be understood that the terms "comprises", "including", "having", "includes" and / or "comprising", when used in this specification, indicate the presence of the stated features, elements and / or components, but do not exclude the presence or addition of one or more other features, elements, components and / or combinations thereof. In addition, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire listed features rather than modifying the individual elements in the list. In addition, when describing embodiments of the present application, "may" is used to mean "one or more embodiments of the present application". And, the term "exemplary" is intended to refer to an example or illustration.

[0040] Unless otherwise defined, all terms (including technical terms and scientific terms) used in this article have the same meaning as commonly understood by ordinary technicians in the field to which this application belongs. It should also be understood that terms (such as terms defined in commonly used dictionaries) should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal sense unless explicitly defined in this article.

[0041] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0042] The features, principles and other aspects of the present application are described in detail below.

[0043] 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, which are arranged in sequence from the first side to the second side along the optical axis.

[0044] In an exemplary embodiment, the optical lens provided by the present application can be used as, for example, a projection lens or a laser radar transmitting end lens, in which case the second side of the optical lens can be an image source side, and the first side can be an object side. The second side of the optical lens is provided with an image source surface of the optical lens.

[0045] In an exemplary embodiment, the optical lens provided by the present application can be used as, for example, a vehicle-mounted camera lens or a laser radar receiving end lens. In this case, 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 be imaged on the image side. The second side of the optical lens is provided with an imaging surface of the optical lens.

[0046] 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 may be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS).

[0047] In an exemplary embodiment, the first lens may have a negative optical power, and its first side surface is a convex surface and the second side surface is a concave surface. The first lens has a negative optical power, which plays a role in diffusing light, and collects as much light of a large field of view as possible to enter the rear optical system, which is conducive to achieving a large field of view angle. Among them, the first side surface of the first lens is a convex surface, which is conducive to converging light to achieve a large field of view angle. The second side surface of the first lens is a concave surface, which can play a role in quickly diverging the light passing through the first lens to the second lens, which can reduce the field of view entering the second lens, which is conducive to the second lens behind to correct the field of view aberration and improve the system resolution.

[0048] In an exemplary embodiment, the first lens may have a negative optical power, and its first side surface is a plane and its second side surface is a concave surface. The first lens has a negative optical power, which plays a role in diffusing light, collects as much large field of view light as possible to enter the rear optical system, and is conducive to achieving a large field of view. The first side surface of the first lens is a plane, which plays a role in transitioning light to the second side surface. The second side surface of the first lens is a concave surface, which can diverge the large-angle light passing through the first lens, which is conducive to the rear optical system to correct the aberration caused by the large-angle light, and achieve high resolution.

[0049] In an exemplary embodiment, the second lens may have positive focal length, and its first side surface is concave and its second side surface is convex. The second lens has positive focal length and functions to converge light, and cooperates with the first lens to converge and compress the divergent large field of view light to the rear group, thereby achieving a large field of view and improving edge resolution. The first side surface of the second lens is concave, which functions to slightly diffuse the light converged by the front group to the rear group. The second side surface of the second lens is convex, which functions to converge the light to the third lens. The concave-convex shape of the second lens makes the front and rear groups of light of the optical lens smooth, that is, the light from the second lens to the third lens transitions smoothly, which is conducive to reducing the sensitivity of the system.

[0050] In an exemplary embodiment, the second lens may have a negative optical power, and its first side surface is a concave surface, and its second side surface is a convex surface. The second lens has a negative optical power and has a divergent effect on the light, and receives the light passing through the first lens, so that the height of the edge field of view light beam is higher and the width is wider, which is conducive to improving the relative illumination of the edge field of view. The concave and convex shape of the second lens is conducive to a smooth transition of the light from the second lens to the third lens, which is conducive to reducing the sensitivity of the system.

[0051] In an exemplary embodiment, the third lens may have a negative optical power, and its first side surface is a concave surface, and its second side surface is a concave surface. The third lens has a negative optical power, and when used with a second lens having a positive optical power, it is beneficial to collect the light converged by the first lens and the second lens and properly diffuse it, so that the light trend is more stable, which is beneficial to lengthening the back focus. The first side surface of the third lens is a concave surface, which is beneficial to collect the light entering through the second lens and make the light trend transition smooth. The second side surface of the third lens is a concave surface, which plays a role in transitioning the light to the fourth lens.

[0052] In an exemplary embodiment, the third lens may have a negative optical power, and its first side surface is a plane and its second side surface is a concave surface. The third lens has a negative optical power and has a divergent effect on light. The first side surface of the third lens is a plane, which can smoothly receive the light passing through the second lens, so that the light emitted by the second lens can smoothly enter the rear optical system. The second side surface of the third lens is a concave surface, which plays a role in slightly diffusing the excessively converged light in the front, which is conducive to achieving a long back focus.

[0053] In an exemplary embodiment, the third lens may have negative optical power, and its first side surface is convex and its second side surface is concave. The third lens has negative optical power and has a divergent effect on light. The first side surface of the third lens is convex, which has the effect of converging light and can smoothly transition the excessively divergent light of the front group to the rear group. The second side surface is concave, which is conducive to achieving a long back focus.

[0054] In an exemplary embodiment, the third lens may have positive power, and its first side surface is convex and its second side surface is convex. The third lens has positive power, and when used with the second lens having negative power, it is beneficial to converge the light diffused by the second lens, further making the light trend more stable, and is beneficial to lengthening the back focus. The first side surface of the third lens is convex, and has a strong ability to converge light, which is beneficial to achieve a large FOV (Field Of View). The second side surface of the third lens is convex, which plays a role in transitioning the light to the fourth lens.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] In an exemplary embodiment, an aperture may be provided in the optical lens. For example, the aperture may be provided between the second lens and the third lens, which is beneficial for 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 aperture disclosed herein is only an example and not a limitation; in alternative embodiments, the aperture may also be provided at other positions according to actual needs.

[0063] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.25≤T23 / TL≤0.9, wherein 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 from the first side of the first lens to the second side of the fifth lens on the optical axis. When 0.25≤T23 / TL≤0.9 is satisfied, the air gap between the second lens and the third lens is large, so that the aperture of the light entering the rear is large, which is beneficial for the rear system to correct aberrations and reduce 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, system aberrations can be corrected more effectively and system sensitivity can be reduced.

[0064] 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 focal power of the first lens to negative and by controlling the focal length range of the first lens, the degree of compression of the field angle after the first lens receives a large viewing angle is appropriate, which is conducive to reducing 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 conducive to further reducing the sensitivity of the system.

[0065] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.5≤R4 / (R3-d3)≤1.2, wherein 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 center thickness of the second lens. When the condition 0.5≤R4 / (R3-d3)≤1.2 is satisfied, the shape of the second lens is controlled to be similar to a concentric circular lens, and the light trend of the second lens can be corrected to make the field angle of the light entering the third lens small, making the light more stable, thereby further reducing the sensitivity of the system and improving the resolution of the optical lens.

[0066] 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 of the optical lens, and H is the image height corresponding to the maximum field of view of the optical lens. F) / H≥45°, which is conducive to meeting the large field of view and telephoto characteristics, and at the same time helps to improve the central resolution of the optical lens. Furthermore, the optical lens can meet 50°≤(FOV F) / H≤60°, which is conducive to further satisfying the large field of view and telephoto characteristics and further improving the central resolution of the lens.

[0067] In an exemplary embodiment, the optical lens according to the present application may satisfy: TTL / F≤6.5, where TTL is the total optical length of the optical lens, that is, the distance from the first side surface of the first lens to the imaging surface (or image source surface) of the optical lens on the optical axis. Satisfying TTL / F≤6.5, achieving a shorter TTL under a certain focal length is conducive to miniaturization of the optical lens. Furthermore, the optical lens may satisfy 4≤TTL / F≤6, which is conducive to further miniaturization of the lens.

[0068] In an exemplary embodiment, the optical lens according to the present application may satisfy: TTL / H / FOV×1°≤0.8. When this condition is satisfied, the TTL is shorter at the same field of view, which is conducive to miniaturization of the lens. Furthermore, the optical lens may satisfy 0.1≤TTL / H / FOV×1°≤0.5, which is conducive to further miniaturization of the lens.

[0069] In an exemplary embodiment, the optical lens according to the present application may satisfy: TTL / H / θ≤25, where θ is the arc value corresponding to the maximum field angle of the optical lens. When this condition is satisfied, the TTL is shorter under the same image plane, which is conducive to miniaturization of the lens. Furthermore, the optical lens may satisfy 10≤TTL / H / θ≤22, which is conducive to further miniaturization of the lens.

[0070] In an exemplary embodiment, the optical lens according to the present application may satisfy: TTL / DMAX≤6, where DMAX is the maximum value of the maximum aperture of each optical surface of the first lens to the fifth lens. Satisfying this conditional expression can make the total length of the system relatively short, which is conducive to miniaturization of the lens. Furthermore, the optical lens may satisfy 2≤TTL / DMAX≤5.5, which is conducive to further miniaturization of the lens.

[0071] In an exemplary embodiment, the optical lens according to the present application may satisfy: (F θ) / D≥0.35, where D is the maximum aperture of the first side of the first lens. When this condition is met, at a certain field of view, the aperture is small, which is conducive to miniaturization of the lens. Furthermore, the optical lens can meet 0.4≤(F*θ) / D≤0.8, which is conducive to further miniaturization of the lens.

[0072] In an exemplary embodiment, the optical lens according to the present application may satisfy: D / H / FOV×1°≤0.08. When this condition is satisfied, at a certain image height, the aperture is small, which is conducive to miniaturization of the lens. Furthermore, the optical lens may satisfy 0.02≤D / H / FOV×1°≤0.06, which is conducive to further miniaturization of the lens.

[0073] In an exemplary embodiment, the optical lens according to the present application may satisfy: D / H / θ≤5. When this condition is satisfied, at a certain image height, the aperture is small, which is conducive to miniaturization of the lens. Furthermore, the optical lens may satisfy 1.5≤D / H / θ≤3.5, which is conducive to further miniaturization of the lens.

[0074] In an exemplary embodiment, the optical lens according to the present application may satisfy: D / H / F×1mm≤0.2. When this condition is satisfied, the aperture is small under a certain field of view angle and focal length, which is conducive to miniaturization of the lens. Furthermore, the optical lens may satisfy 0.05≤D / H / F×1mm≤0.15, which is conducive to further miniaturization of the lens.

[0075] 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 surface of the fifth lens to the imaging surface (or image source surface) of the optical lens on the optical axis. Satisfying this conditional formula helps to achieve a long back focal effect, leaving enough space for adding optical devices such as prisms, and facilitating processing and assembly.

[0076] In an exemplary embodiment, the optical lens according to the present application may satisfy: BFL / TL≥0.42. Satisfying this conditional expression helps to achieve a long back focus effect, leaves enough space for adding optical components such as prisms, and facilitates processing and assembly.

[0077] In an exemplary embodiment, the optical lens according to the present application may satisfy: 1.3≤F / H≤2. Satisfying this conditional expression helps improve the resolution by controlling the focal length and image height within a certain range.

[0078] 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. Satisfying this conditional expression is conducive to achieving a small FNO, while also being conducive to increasing the amount of light passing through and helping to improve relative illumination. Furthermore, the optical lens may satisfy 1.9≤F / ENPD≤2, which is conducive to further achieving a small FNO and improving relative illumination.

[0079] 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, while also facilitating an increase in light throughput and improving relative illumination.

[0080] In an exemplary embodiment, the optical lens according to the present application may satisfy: DST / F≥0.65, where DST is the aperture diameter. When this condition is satisfied, the ratio of the aperture diameter to the effective focal length of the lens is controlled to be relatively large, which is conducive to the lens achieving a large aperture characteristic.

[0081] In an exemplary embodiment, the optical lens according to the present application may satisfy: φ3-5 / φ≥0.1, wherein φ3-5 is the combined focal length of the third lens, the fourth lens, and the fifth lens, and φ is the focal length of the optical lens. By satisfying this conditional formula, by reasonably allocating the focal length of the rear group, it is beneficial to make the focal length of the rear group longer while maintaining miniaturization, and to achieve a long back focus characteristic. Furthermore, the optical lens may satisfy 0.1≤φ3-5 / φ≤0.8, which is beneficial to further reasonably allocate the focal length of the rear group, make the focal length of the rear group longer while maintaining miniaturization, and further achieve a long back focus characteristic.

[0082] 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 between the first side surface of the third lens and the second side surface of the fifth lens on the optical axis. When this condition is satisfied, the distance between the first side surface of the third lens and the second side surface of the fifth lens is controlled to be smaller, which is conducive to miniaturization of the lens.

[0083] In an exemplary embodiment, the optical lens according to the present application may satisfy: d6-9 / TTL≤0.24. When this condition is satisfied, the distance between the first side surface of the third lens and the second side surface of the fifth lens is controlled to be smaller, which is beneficial to miniaturization of the lens.

[0084] 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. When this condition is satisfied, the air gap of the rear lens group is controlled to be smaller, so that the diffuse large-aperture light enters the fifth lens at a smaller angle, which is conducive to miniaturization of the lens.

[0085] In an exemplary embodiment, the optical lens according to the present application may satisfy: d8 / TTL≤0.005. When this condition is satisfied, the air gap of the rear lens group is controlled to be smaller, so that the angle of the diffuse large-diameter light entering the fifth lens is smaller, which is conducive to miniaturization of the lens.

[0086] In an exemplary embodiment, the optical lens according to the present application may satisfy: D9 BFL / H≥42mm, where D9 is the maximum aperture of the first side of the fifth lens. The larger the aperture of the first side of the fifth lens, the smaller the aperture aberration can be, and the light correction of different regions can be more precise. Meeting this conditional formula is conducive to correcting the incident angle of the edge field of view of the light emitted by the fifth lens to the image plane, which is conducive to achieving a small CRA. Furthermore, the optical lens can meet 50mm≤D9 BFL / H≤98mm, which is conducive to further correcting the incident angle of the edge field of view of the light emitted by the fifth lens to the image plane, thereby achieving a smaller CRA.

[0087] In an exemplary embodiment, the optical lens according to the present application may satisfy: |F2 / F|≥8, where F2 is the focal length of the second lens. This conditional expression is satisfied, and by reasonably allocating the focal length of the second lens and keeping the focal length of the second lens relatively large, light can enter the optical system smoothly. At the same time, the light angle of the first lens is negative, which is conducive to collecting light, thereby ensuring the light throughput of the optical system and improving the resolution.

[0088] In an exemplary embodiment, the optical lens according to the present application may satisfy: -5≤R3 / F≤-0.2, where R3 is the radius of curvature of the first side of the second lens. This conditional formula is satisfied, and by controlling the radius of curvature of the first side of the second lens within a reasonable range, the second lens initially converges the light emitted by the first lens, which is conducive to reducing the field of view angle so that it smoothly transitions to the rear, thereby reducing the system sensitivity. Furthermore, the optical lens may satisfy -0.9≤R3 / F≤-0.35, which is conducive to further reducing the field of view angle so that it smoothly transitions to the rear, further reducing the system sensitivity.

[0089] In an exemplary embodiment, the optical lens according to the present application may satisfy: -2.5≤R2 / R3≤-0.25, where R2 is the radius of curvature of the second side of the first lens. By satisfying this conditional formula, by controlling the second side of the first lens to be a concave surface, a steeper light path can be achieved, shortening the optical path; and by matching the first side of the second lens to be a concave surface, a smooth light path can be achieved. Moreover, by reasonably matching the radii of curvature of these two optical surfaces, the system sensitivity can be reduced while achieving miniaturization. Furthermore, the optical lens may satisfy -2≤R2 / R3≤-0.3, which is conducive to further achieving miniaturization while reducing the system sensitivity.

[0090] In an exemplary embodiment, the optical lens according to the present application may satisfy: -5≤F1 / F345≤-0.3, wherein F345 is the combined focal length of the third lens, the fourth lens, and the fifth lens. This conditional formula is satisfied, and by reasonably controlling the focal length of the first lens, the first lens compresses the field of view of the large field of view after receiving the large field of view, so as to facilitate the correction and reduction of chromatic aberration by the rear lens group, and 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 the large field of view light. If the focal length is too small, the sensitivity is high and it is not conducive to resolution. Furthermore, the optical lens may satisfy -4≤F1 / F345≤-0.5, which is beneficial to further enable the first lens to receive the large field of view light, thereby facilitating the correction and reduction of chromatic aberration by the rear lens group.

[0091] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.55≤|Fmin / Fmax|≤1.3, wherein 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. Satisfying the conditional expression makes the focal length distribution in the rear lens group uniform, and the degree of deflection of light in the third lens, the fourth lens, and the fifth lens is relatively close, which is conducive to smooth transition of light and improved resolution.

[0092] In an exemplary embodiment, the optical lens according to the present application may satisfy: 1≤F5 / F≤4.5, where F5 is the focal length of the fifth lens. When this condition is satisfied, the fifth lens has positive focal power and the focal length is set within a reasonable range, which can ensure that light is collected onto the image plane while achieving a small CRA.

[0093] In an exemplary embodiment, the optical lens according to the present application may 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 formula, by controlling the surface shape of the second side surface of the fourth lens, the fourth lens can share the pressure of the fifth lens converging light, thereby improving the system resolution. Furthermore, the optical lens may satisfy -4≤R8 / F5≤-0.15, which is conducive to the fourth lens further sharing the pressure of the fifth lens converging light and improving the resolution.

[0094] In an exemplary embodiment, the optical lens according to the present application may 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 by the rear system will be deeper, thereby bringing greater sensitivity pressure to the system. By satisfying this conditional formula, by controlling the air gap between the first lens and the second lens, the sensitivity can be reduced while ensuring miniaturization.

[0095] 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.

[0096] 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.

[0097] 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.

[0098] 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 plane to filter light with different wavelengths to prevent damage to the image-side element (e.g., chip) of the optical lens.

[0099] 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.

[0100] In an exemplary embodiment, the first lens, the second lens or the fifth lens is an aspherical lens. The configuration of the aspherical lens can change the surface shape, thereby changing the angle of light deflection, reducing system aberrations, and further improving the resolution. It should be emphasized that, according to actual needs, other lenses can also use aspherical mirror surfaces.

[0101] In an exemplary embodiment, the second lens is an aspherical lens with a concave-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 cutoff frequency of 60lp / mm is greater than 0.6.

[0102] In an exemplary embodiment, the third lens and the fourth lens may form a cemented lens. After the third lens and the fourth lens are cemented, chromatic aberration can be better corrected to improve resolution, and the third lens and the fourth lens can also be reduced in tolerance sensitivity after the cementation. At the same time, the third lens and the fourth lens are cemented to smoothly transition the light passing through the front lens to the rear optical system, reducing the total length of the lens; and can fully correct various aberrations of the optical system, and can improve resolution, optimize optical performance such as distortion and CRA under the premise of compact structure.

[0103] In addition, the above-mentioned gluing method between lenses has at least one of the following advantages: reducing the air gap between the two lenses and reducing the total length of the system; reducing the assembly components between the lenses, reducing the process and reducing the cost; reducing the sensitivity of lens unit tolerances such as tilt / eccentricity generated during the assembly process and improving the production yield; reducing the light loss caused by reflection between lenses and improving the illumination; further reducing the field curvature and effectively correcting the off-axis point aberration of the system. Such a gluing design shares the overall chromatic aberration correction of the system, effectively corrects the aberration to improve the resolution, and makes the optical lens compact as a whole to meet the requirements of miniaturization.

[0104] In an exemplary embodiment, the first lens to the fifth lens may be a glass lens or a plastic lens. The present application does not specifically limit the specific number of glass lenses and plastic lenses. Specifically, when focusing on resolution quality and reliability, the first lens to the fifth lens may all be glass aspherical lenses. An optical lens made of glass can suppress the deviation of the back focus of the imaging system component with temperature changes to improve the stability of the system. At the same time, the use of glass material can avoid problems such as lens imaging blur caused by high and low temperature changes in the use environment and affecting the normal use of the lens. 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 applications where temperature stability requirements are lower, the first lens to the fifth lens in the optical lens can also be made of plastic. Using plastic to make optical lenses can effectively reduce production costs.

[0105] However, those skilled in the art should understand that, without departing from the technical solution claimed in the present application, the number of lenses constituting the 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.

[0106] Specific embodiments of the optical lens applicable to the above-mentioned embodiments are further described below with reference to the accompanying drawings.

[0107] Example 1

[0108] The following reference Figure 1 The optical lens according to Example 1 of the present application is described. Figure 1 A schematic structural diagram of an optical lens according to Example 1 of the present application is shown.

[0109] like Figure 1 As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4 and a fifth lens L5 in sequence from the first side to the second side along the optical axis.

[0110] 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.

[0111] In this embodiment, the third lens L3 and the fourth lens L4 form a cemented lens.

[0112] The first lens L1 has negative power, its first side surface S1 is convex, and the second side surface S2 is concave. The second lens L2 has positive power, its first side surface S3 is concave, and the second side surface S4 is convex. The third lens L3 has negative power, its first side surface S5 is concave, and the second side surface S6 is concave. The fourth lens L4 has positive power, its first side surface S6 is convex, and the second side surface S7 is convex. The fifth lens L5 has positive power, its first side surface S8 is convex, and the second side surface S9 is convex.

[0113] 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 having a first side surface S10 and a second side surface S11, the protective glass having a first side surface S12 and a second side surface S13, and the flat glass having a first side surface S14 and a second side surface S15.

[0114] The optical lens provided in the present application can be used as, for example, a vehicle-mounted camera lens. In this case, light from an object sequentially passes through each of the optical surfaces S1 to S15 and is finally imaged on an imaging surface IMA disposed on the second side, where an image sensor chip is disposed. In this embodiment, the second side surface S15 of the flat glass coincides with the imaging surface IMA.

[0115] It should be understood that the optical lens provided in the present application can also be used as, for example, a projection lens or a laser radar transmitting end lens. In this case, light from the image source surface IMA passes through each optical surface S15 to S1 in sequence and is finally projected onto a projection surface (not shown) arranged on the first side.

[0116] Table 1 shows the curvature radius R, thickness / distance, refractive index Nd, and Abbe number Vd of each lens of the optical lens of Example 1.

[0117] Table 1

[0118] 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. The surface shape of each aspherical mirror surface can be defined by but not limited to the following aspherical surface formula (1).

[0119] (1)

[0120] in, x The aspheric surface is at a height of h When the position is , the distance vector height from the vertex of the aspherical surface; c is the paraxial curvature of the aspheric surface, c =1 / R (i.e., the paraxial curvature c is the radius of curvature in Table 1 above R The inverse of ); k is the cone coefficient; Ai Aspheric i -th order correction factor.

[0121] Table 2 shows the conic coefficient (k) and high-order coefficients that can be used for the aspheric mirror surface in this embodiment. A4 , A6 , A8 , A10 , A12 , A14 and A16 .

[0122] Table 2

[0123] Example 2

[0124] The following reference Figure 2 The optical lens according to Embodiment 2 of the present application is described. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to Embodiment 1 will be omitted.

[0125] like Figure 2 As shown, the optical lens 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 in sequence from the first side to the second side along the optical axis, wherein the third lens L3 and the fourth lens L4 form a cemented lens.

[0126] The first lens L1 has negative power, its first side surface S1 is convex, and the second side surface S2 is concave. The second lens L2 has positive power, its first side surface S3 is concave, and the second side surface S4 is convex. The third lens L3 has negative power, its first side surface S5 is concave, and the second side surface S6 is concave. The fourth lens L4 has positive power, its first side surface S6 is convex, and the second side surface S7 is convex. The fifth lens L5 has positive power, its first side surface S8 is convex, and the second side surface S9 is convex.

[0127] Table 3 shows the curvature radius R, thickness / distance, refractive index Nd, and dispersion coefficient Vd of each lens of the optical lens of Example 2.

[0128] Table 3

[0129] 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. The surface shape of each aspherical mirror surface can be defined by, but not limited to, the formula (1) given in the above embodiment 1.

[0130] Table 4 shows the conic coefficient (k) and high-order coefficients that can be used for the aspheric mirror surface in this embodiment. A4 , A6 , A8 , A10 , A12 , A14 and A16 .

[0131] Table 4

[0132] Example 3

[0133] The following reference Figure 3 Describe the optical lens according to Example 3 of the present application.

[0134] like Figure 3 As shown, the optical lens 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 in sequence from the first side to the second side along the optical axis, wherein the third lens L3 and the fourth lens L4 form a cemented lens.

[0135] The first lens L1 has negative power, its first side surface S1 is a plane, and the second side surface S2 is a concave surface. The second lens L2 has positive power, its first side surface S3 is a concave surface, and the second side surface S4 is a convex surface. The third lens L3 has negative power, its first side surface S5 is a convex surface, and the second side surface S6 is a concave surface. The fourth lens L4 has positive power, its first side surface S6 is a convex surface, and the second side surface S7 is a convex surface. The fifth lens L5 has positive power, its first side surface S8 is a convex surface, and the second side surface S9 is a convex surface.

[0136] Table 5 shows the curvature radius R, thickness / distance, refractive index Nd and dispersion coefficient Vd of each lens of the optical lens of Example 3.

[0137] Table 5

[0138] In this embodiment, the first side surface S3 and the second side surface S4 of the second lens L2 and the first side surface S8 and the second side surface S9 of the fifth lens L5 of the optical lens are aspherical mirror surfaces. The surface shape of each aspherical mirror surface can be defined by, but not limited to, the formula (1) given in the above-mentioned embodiment 1.

[0139] Table 6 shows the conic coefficient (k) and high-order coefficients that can be used for the aspheric mirror surface in this embodiment. A4 , A6 , A8 , A10 , A12 , A14 and A16 .

[0140] Table 6

[0141] Example 4

[0142] The following reference Figure 4 Describe the optical lens according to Example 4 of the present application.

[0143] like Figure 4 As shown, the optical lens includes a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4 and a fifth lens L5 in sequence from the first side to the second side along the optical axis.

[0144] The first lens L1 has negative power, its first side surface S1 is a plane, and the second side surface S2 is a concave surface. The second lens L2 has positive power, its first side surface S3 is a concave surface, and the second side surface S4 is a convex surface. The third lens L3 has negative power, its first side surface S5 is a convex surface, and the second side surface S6 is a concave surface. The fourth lens L4 has positive power, its first side surface S6 is a convex surface, and the second side surface S7 is a convex surface. The fifth lens L5 has positive power, its first side surface S8 is a convex surface, and the second side surface S9 is a convex surface.

[0145] Table 7 shows the curvature radius R, thickness / distance, refractive index Nd and dispersion coefficient Vd of each lens of the optical lens of Example 4.

[0146] Table 7

[0147] In this embodiment, the first side surface S3 and the second side surface S4 of the second lens L2 and the first side surface S8 and the second side surface S9 of the fifth lens L5 of the optical lens are aspherical mirror surfaces. The surface shape of each aspherical mirror surface can be defined by, but not limited to, the formula (1) given in the above-mentioned embodiment 1.

[0148] Table 8 shows the conic coefficient (k) and high-order coefficients that can be used for the aspheric mirror surface in this embodiment. A4 , A6 , A8 , A10 , A12 , A14 and A16 .

[0149] Table 8

[0150] Example 5

[0151] The following reference Figure 5 Describe the optical lens according to Example 5 of the present application.

[0152] like Figure 5 As shown, the optical lens 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 in sequence from the first side to the second side along the optical axis, wherein the third lens L3 and the fourth lens L4 form a cemented lens.

[0153] The first lens L1 has negative power, its first side surface S1 is convex, and the second side surface S2 is concave. The second lens L2 has positive power, its first side surface S3 is concave, and the second side surface S4 is convex. The third lens L3 has negative power, its first side surface S5 is a plane, and the second side surface S6 is concave. The fourth lens L4 has positive power, its first side surface S6 is convex, and the second side surface S7 is convex. The fifth lens L5 has positive power, its first side surface S8 is convex, and the second side surface S9 is convex.

[0154] Table 9 shows the curvature radius R, thickness / distance, refractive index Nd and dispersion coefficient Vd of each lens of the optical lens of Example 5.

[0155] Table 9

[0156] 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. The surface shape of each aspherical mirror surface can be defined by, but not limited to, the formula (1) given in the above embodiment 1.

[0157] Table 10 shows the conic coefficient (k) and high-order coefficients that can be used for the aspheric mirror surface in this embodiment. A4 ,A6 , A8 , A10 , A12 , A14 and A16 .

[0158] Table 10

[0159] Example 6

[0160] The following reference Figure 6 Describe the optical lens according to Example 6 of the present application.

[0161] like Figure 6 As shown, the optical lens 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 in sequence from the first side to the second side along the optical axis, wherein the third lens L3 and the fourth lens L4 form a cemented lens.

[0162] The first lens L1 has negative power, its first side surface S1 is convex, and the second side surface S2 is concave. The second lens L2 has positive power, its first side surface S3 is concave, and the second side surface S4 is convex. The third lens L3 has negative power, its first side surface S5 is a plane, and the second side surface S6 is concave. The fourth lens L4 has positive power, its first side surface S6 is convex, and the second side surface S7 is convex. The fifth lens L5 has positive power, its first side surface S8 is convex, and the second side surface S9 is convex.

[0163] Table 11 shows the curvature radius R, thickness / distance, refractive index Nd and dispersion coefficient Vd of each lens of the optical lens of Example 6.

[0164] Table 11

[0165] 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. The surface shape of each aspherical mirror surface can be defined by, but not limited to, the formula (1) given in the above embodiment 1.

[0166] Table 12 shows the conic coefficient (k) and high-order coefficients that can be used for the aspheric mirror surface in this embodiment. A4 , A6 , A8 , A10 , A12 , A14 and A16 .

[0167] Table 12

[0168] Example 7

[0169] The following reference Figure 7 Describe the optical lens according to Example 7 of the present application.

[0170] like Figure 7 As shown, the optical lens 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 in sequence from the first side to the second side along the optical axis, wherein the third lens L3 and the fourth lens L4 form a cemented lens.

[0171] The first lens L1 has negative power, its first side surface S1 is convex, and the second side surface S2 is concave. The second lens L2 has negative power, its first side surface S3 is concave, and the second side surface S4 is convex. The third lens L3 has negative power, its first side surface S5 is concave, and the second side surface S6 is concave. The fourth lens L4 has positive power, its first side surface S6 is convex, and the second side surface S7 is convex. The fifth lens L5 has positive power, its first side surface S8 is convex, and the second side surface S9 is convex.

[0172] Table 13 shows the curvature radius R, thickness / distance, refractive index Nd and dispersion coefficient Vd of each lens of the optical lens of Example 7.

[0173] Table 13

[0174] 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. The surface shape of each aspherical mirror surface can be defined by, but not limited to, the formula (1) given in the above embodiment 1.

[0175] Table 14 shows the conic coefficient (k) and high-order coefficients that can be used for the aspheric mirror surface in this embodiment. A4 , A6 , A8 , A10 , A12 , A14 and A16 .

[0176] Table 14

[0177] Example 8

[0178] The following reference Figure 8 Describe the optical lens according to Example 8 of the present application.

[0179] like Figure 8As shown, the optical lens 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 in sequence from the first side to the second side along the optical axis, wherein the third lens L3 and the fourth lens L4 form a cemented lens.

[0180] The first lens L1 has negative power, its first side surface S1 is convex, and the second side surface S2 is concave. The second lens L2 has negative power, its first side surface S3 is concave, and the second side surface S4 is convex. The third lens L3 has negative power, its first side surface S5 is concave, and the second side surface S6 is concave. The fourth lens L4 has positive power, its first side surface S6 is convex, and the second side surface S7 is convex. The fifth lens L5 has positive power, its first side surface S8 is convex, and the second side surface S9 is convex.

[0181] Table 15 shows the curvature radius R, thickness / distance, refractive index Nd and dispersion coefficient Vd of each lens of the optical lens of Example 8.

[0182] Table 15

[0183] 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. The surface shape of each aspherical mirror surface can be defined by, but not limited to, the formula (1) given in the above embodiment 1.

[0184] Table 16 shows the conic coefficient (k) and high-order coefficients that can be used for the aspheric mirror surface in this embodiment. A4 , A6 , A8 , A10 , A12 , A14 and A16 .

[0185] Table 16

[0186] Example 9

[0187] The following reference Fig. 9 Describe the optical lens according to Example 9 of the present application.

[0188] like Fig. 9 As shown, the optical lens 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 in sequence from the first side to the second side along the optical axis, wherein the third lens L3 and the fourth lens L4 form a cemented lens.

[0189] The first lens L1 has negative power, its first side surface S1 is convex, and the second side surface S2 is concave. The second lens L2 has positive power, its first side surface S3 is concave, and the second side surface S4 is convex. The third lens L3 has positive power, its first side surface S5 is convex, and the second side surface S6 is convex. The fourth lens L4 has negative power, its first side surface S6 is concave, and the second side surface S7 is convex. The fifth lens L5 has positive power, its first side surface S8 is convex, and the second side surface S9 is convex.

[0190] In this embodiment, the first side surface S9 of the fifth lens L5 is inversely curved.

[0191] In this embodiment, the optical lens can be used as, for example, a projection lens or a laser radar transmitting end lens. At this time, light from the image source plane IMA (S10) passes through the optical surfaces S9 to S1 in sequence and is finally projected onto a projection surface (not shown) disposed on the first side.

[0192] It should be understood that the optical lens provided in the present application can also be used as, for example, a vehicle-mounted lens. In this case, light from an object passes through each optical surface S1 to S9 in sequence and is finally imaged on an imaging surface IMA disposed on the second side, wherein an image sensor chip is disposed at the imaging surface IMA.

[0193] Table 17 shows the curvature radius R, thickness / distance, refractive index Nd and dispersion coefficient Vd of each lens of the optical lens of Example 9.

[0194] Table 17

[0195] In this embodiment, the first side surface S3 and the second side surface S4 of the second lens L2 and the first side surface S8 and the second side surface S9 of the fifth lens L5 of the optical lens are aspherical mirror surfaces. The surface shape of each aspherical mirror surface can be defined by, but not limited to, the formula (1) given in the above-mentioned embodiment 1.

[0196] Table 18 shows the conic coefficient (k) and high-order coefficients that can be used for the aspheric mirror surface in this embodiment. A4 , A6 , A8 , A10 , A12 , A14 and A16 .

[0197] Table 18

[0198] Example 10

[0199] The following reference Fig.10 An optical lens according to Example 10 of the present application is described.

[0200] like Fig.10 As shown, the optical lens 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 in sequence from the first side to the second side along the optical axis, wherein the third lens L3 and the fourth lens L4 form a cemented lens.

[0201] The first lens L1 has negative power, its first side surface S1 is convex, and the second side surface S2 is concave. The second lens L2 has positive power, its first side surface S3 is concave, and the second side surface S4 is convex. The third lens L3 has positive power, its first side surface S5 is convex, and the second side surface S6 is convex. The fourth lens L4 has negative power, its first side surface S6 is concave, and the second side surface S7 is convex. The fifth lens L5 has positive power, its first side surface S8 is convex, and the second side surface S9 is convex.

[0202] In this embodiment, the first side surface S9 of the fifth lens L5 is inversely curved.

[0203] In this embodiment, the optical lens can be used as, for example, a projection lens or a laser radar transmitting end lens. At this time, light from the image source plane IMA (S10) passes through the optical surfaces S9 to S1 in sequence and is finally projected onto a projection surface (not shown) disposed on the first side.

[0204] It should be understood that the optical lens provided in the present application can also be used as, for example, a vehicle-mounted lens. In this case, light from an object passes through each optical surface S1 to S9 in sequence and is finally imaged on an imaging surface IMA disposed on the second side, wherein an image sensor chip is disposed at the imaging surface IMA.

[0205] Table 19 shows the curvature radius R, thickness / distance, refractive index Nd and dispersion coefficient Vd of each lens of the optical lens of Example 10.

[0206] Table 19

[0207] In this embodiment, the first side surface S3 and the second side surface S4 of the second lens L2 and the first side surface S8 and the second side surface S9 of the fifth lens L5 of the optical lens are aspherical mirror surfaces. The surface shape of each aspherical mirror surface can be defined by, but not limited to, the formula (1) given in the above-mentioned embodiment 1.

[0208] Table 20 shows the conic coefficient (k) and high-order coefficients that can be used for the aspheric mirror surface in this embodiment. A4 , A6 , A8 , A10 , A12 , A14 and A16 .

[0209] Table 20

[0210] Embodiment 11

[0211] The following reference Fig.11 Describe the optical lens according to Example 11 of the present application.

[0212] like Fig.11 As shown, the optical lens 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 in sequence from the first side to the second side along the optical axis, wherein the third lens L3 and the fourth lens L4 form a cemented lens.

[0213] The first lens L1 has negative power, its first side surface S1 is convex, and the second side surface S2 is concave. The second lens L2 has positive power, its first side surface S3 is concave, and the second side surface S4 is convex. The third lens L3 has negative power, its first side surface S5 is concave, and the second side surface S6 is concave. The fourth lens L4 has positive power, its first side surface S6 is convex, and the second side surface S7 is convex. The fifth lens L5 has positive power, its first side surface S8 is convex, and the second side surface S9 is a plane.

[0214] Table 21 shows the curvature radius R, thickness / distance, refractive index Nd and dispersion coefficient Vd of each lens of the optical lens of Example 11.

[0215] Table 21

[0216] In this embodiment, the first side surface S1 and the second side surface S2 of the first lens L1, and 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 shape of each aspherical mirror surface can be defined by, but not limited to, the formula (1) given in the above-mentioned embodiment 1.

[0217] Table 22 shows the conic coefficient (k) and high-order coefficients that can be used for the aspheric mirror surface in this embodiment. A4 , A6 , A8 , A10 , A12 , A14 and A16 .

[0218] Table 22

[0219] Example 12

[0220] The following reference Fig.12 Describe the optical lens according to Example 12 of the present application.

[0221] like Fig.12 As shown, the optical lens 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 in sequence from the first side to the second side along the optical axis, wherein the third lens L3 and the fourth lens L4 form a cemented lens.

[0222] The first lens L1 has negative power, its first side surface S1 is convex, and the second side surface S2 is concave. The second lens L2 has positive power, its first side surface S3 is concave, and the second side surface S4 is convex. The third lens L3 has negative power, its first side surface S5 is concave, and the second side surface S6 is concave. The fourth lens L4 has positive power, its first side surface S6 is convex, and the second side surface S7 is convex. The fifth lens L5 has positive power, its first side surface S8 is convex, and the second side surface S9 is a plane.

[0223] Table 23 shows the curvature radius R, thickness / distance, refractive index Nd and dispersion coefficient Vd of each lens of the optical lens of Example 12.

[0224] Table 23

[0225] In this embodiment, the first side surface S1 and the second side surface S2 of the first lens L1, and 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 shape of each aspherical mirror surface can be defined by, but not limited to, the formula (1) given in the above-mentioned embodiment 1.

[0226] Table 24 shows the conic coefficient (k) and high-order coefficients that can be used for the aspheric mirror surface in this embodiment. A4 , A6 , A8 , A10 , A12 , A14 and A16 .

[0227] Table 24

[0228] Embodiment 13

[0229] The following reference Fig.13 Describe the optical lens according to Example 13 of the present application.

[0230] like Fig.13 As shown, the optical lens 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 in sequence from the first side to the second side along the optical axis, wherein the third lens L3 and the fourth lens L4 form a cemented lens.

[0231] The first lens L1 has negative power, its first side surface S1 is convex, and the second side surface S2 is concave. The second lens L2 has positive power, its first side surface S3 is concave, and the second side surface S4 is convex. The third lens L3 has negative power, its first side surface S5 is concave, and the second side surface S6 is concave. The fourth lens L4 has positive power, its first side surface S6 is convex, and the second side surface S7 is convex. The fifth lens L5 has positive power, its first side surface S8 is convex, and the second side surface S9 is concave.

[0232] Table 25 shows the curvature radius R, thickness / distance, refractive index Nd and dispersion coefficient Vd of each lens of the optical lens of Example 13.

[0233] Table 25

[0234] In this embodiment, the first side surface S1 and the second side surface S2 of the first lens L1, and 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 shape of each aspherical mirror surface can be defined by, but not limited to, the formula (1) given in the above-mentioned embodiment 1.

[0235] Table 26 shows the conic coefficient (k) and high-order coefficients that can be used for the aspheric mirror surface in this embodiment. A4 , A6 , A8 , A10 , A12 , A14 and A16 .

[0236] Table 26

[0237] Embodiment 14

[0238] The following reference Fig.14 Describe the optical lens according to Example 14 of the present application.

[0239] like Fig.14 As shown, the optical lens 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 in sequence from the first side to the second side along the optical axis, wherein the third lens L3 and the fourth lens L4 form a cemented lens.

[0240] The first lens L1 has negative power, its first side surface S1 is convex, and the second side surface S2 is concave. The second lens L2 has positive power, its first side surface S3 is concave, and the second side surface S4 is convex. The third lens L3 has negative power, its first side surface S5 is concave, and the second side surface S6 is concave. The fourth lens L4 has positive power, its first side surface S6 is convex, and the second side surface S7 is convex. The fifth lens L5 has positive power, its first side surface S8 is convex, and the second side surface S9 is concave.

[0241] Table 27 shows the curvature radius R, thickness / distance, refractive index Nd and dispersion coefficient Vd of each lens of the optical lens of Example 14.

[0242] Table 27

[0243] In this embodiment, the first side surface S1 and the second side surface S2 of the first lens L1, and 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 shape of each aspherical mirror surface can be defined by, but not limited to, the formula (1) given in the above-mentioned embodiment 1.

[0244] Table 28 shows the conic coefficient (k) and high-order coefficients that can be used for the aspheric mirror surface in this embodiment. A4 , A6 , A8 , A10 , A12 , A14 and A16 .

[0245] Table 28

[0246] Embodiment 15

[0247] The following reference Fig.15 Describe the optical lens according to Example 15 of the present application.

[0248] like Fig.15 As shown, the optical lens 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 in sequence from the first side to the second side along the optical axis, wherein the third lens L3 and the fourth lens L4 form a cemented lens.

[0249] The first lens L1 has negative power, its first side surface S1 is convex, and the second side surface S2 is concave. The second lens L2 has positive power, its first side surface S3 is concave, and the second side surface S4 is convex. The third lens L3 has negative power, its first side surface S5 is convex, and the second side surface S6 is concave. The fourth lens L4 has positive power, its first side surface S6 is convex, and the second side surface S7 is convex. The fifth lens L5 has positive power, its first side surface S8 is a plane, and the second side surface S9 is a convex surface.

[0250] In this embodiment, the first side surface S1 of the first lens L1 has an inverse curve.

[0251] Table 29 shows the curvature radius R, thickness / distance, refractive index Nd and dispersion coefficient Vd of each lens of the optical lens of Example 11.

[0252] Table 29

[0253] In this embodiment, the first side surface S1 and the second side surface S2 of the first lens L1, and 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 shape of each aspherical mirror surface can be defined by, but not limited to, the formula (1) given in the above-mentioned embodiment 1.

[0254] Table 30 shows the conic coefficient (k) and high-order coefficients that can be used for the aspheric mirror surface in this embodiment. A4 , A6 , A8 , A10 , A12 , A14 and A16 .

[0255] Table 30

[0256] Example 16

[0257] The following reference Fig.16 Describe the optical lens according to Example 16 of the present application.

[0258] like Fig.16 As shown, the optical lens 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 in sequence from the first side to the second side along the optical axis, wherein the third lens L3 and the fourth lens L4 form a cemented lens.

[0259] The first lens L1 has negative power, its first side surface S1 is convex, and the second side surface S2 is concave. The second lens L2 has positive power, its first side surface S3 is concave, and the second side surface S4 is convex. The third lens L3 has negative power, its first side surface S5 is convex, and the second side surface S6 is concave. The fourth lens L4 has positive power, its first side surface S6 is convex, and the second side surface S7 is convex. The fifth lens L5 has positive power, its first side surface S8 is a plane, and the second side surface S9 is a convex surface.

[0260] In this embodiment, the first side surface S1 of the first lens L1 has an inverse curve.

[0261] Table 31 shows the curvature radius R, thickness / distance, refractive index Nd and dispersion coefficient Vd of each lens of the optical lens of Example 16.

[0262] Table 31

[0263] In this embodiment, the first side surface S1 and the second side surface S2 of the first lens L1, and 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 shape of each aspherical mirror surface can be defined by, but not limited to, the formula (1) given in the above-mentioned embodiment 1.

[0264] Table 32 shows the conic coefficient (k) and high-order coefficients that can be used for the aspheric mirror surface in this embodiment. A4 , A6 , A8 , A10 , A12 , A14 and A16 .

[0265] Table 32

[0266] Embodiment 17

[0267] The following reference Fig.17 Describe the optical lens according to Example 17 of the present application.

[0268] like Fig.17 As shown, the optical lens 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 in sequence from the first side to the second side along the optical axis, wherein the third lens L3 and the fourth lens L4 form a cemented lens.

[0269] The first lens L1 has negative power, its first side surface S1 is convex, and the second side surface S2 is concave. The second lens L2 has positive power, its first side surface S3 is concave, and the second side surface S4 is convex. The third lens L3 has negative power, its first side surface S5 is convex, and the second side surface S6 is concave. The fourth lens L4 has positive power, its first side surface S6 is convex, and the second side surface S7 is convex. The fifth lens L5 has positive power, its first side surface S8 is concave, and the second side surface S9 is convex.

[0270] Table 33 shows the curvature radius R, thickness / distance, refractive index Nd and dispersion coefficient Vd of each lens of the optical lens of Example 17.

[0271] Table 33

[0272] In this embodiment, the first side surface S1 and the second side surface S2 of the first lens L1, and 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 shape of each aspherical mirror surface can be defined by, but not limited to, the formula (1) given in the above-mentioned embodiment 1.

[0273] Table 34 shows the conic coefficient (k) and high-order coefficients that can be used for the aspheric mirror surface in this embodiment. A4 , A6 , A8 , A10 , A12 , A14 and A16 .

[0274] Table 34

[0275] Embodiment 18

[0276] The following reference Fig.18 Describe the optical lens according to Example 18 of the present application.

[0277] like Fig.18 As shown, the optical lens 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 in sequence from the first side to the second side along the optical axis, wherein the third lens L3 and the fourth lens L4 form a cemented lens.

[0278] The first lens L1 has negative power, its first side surface S1 is convex, and the second side surface S2 is concave. The second lens L2 has positive power, its first side surface S3 is concave, and the second side surface S4 is convex. The third lens L3 has negative power, its first side surface S5 is convex, and the second side surface S6 is concave. The fourth lens L4 has positive power, its first side surface S6 is convex, and the second side surface S7 is convex. The fifth lens L5 has positive power, its first side surface S8 is concave, and the second side surface S9 is convex.

[0279] In this embodiment, the first side surface S1 of the first lens L1 has an inverse curve.

[0280] Table 35 shows the curvature radius R, thickness / distance, refractive index Nd and dispersion coefficient Vd of each lens of the optical lens of Example 18.

[0281] Table 35

[0282] In this embodiment, the first side surface S1 and the second side surface S2 of the first lens L1, and 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 shape of each aspherical mirror surface can be defined by, but not limited to, the formula (1) given in the above-mentioned embodiment 1.

[0283] Table 36 shows the conic coefficient (k) and high-order coefficients that can be used for the aspheric mirror surface in this embodiment. A4 , A6 , A8 , A10 , A12 , A14 and A16 .

[0284] Table 36

[0285] Embodiment 19

[0286] The following reference Fig.19 Describe the optical lens according to Example 19 of the present application.

[0287] like Fig.19 As shown, the optical lens 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 in sequence from the first side to the second side along the optical axis, wherein the third lens L3 and the fourth lens L4 form a cemented lens.

[0288] The first lens L1 has negative power, its first side surface S1 is convex, and the second side surface S2 is concave. The second lens L2 has positive power, its first side surface S3 is concave, and the second side surface S4 is convex. The third lens L3 has negative power, its first side surface S5 is a plane, and the second side surface S6 is concave. The fourth lens L4 has positive power, its first side surface S6 is convex, and the second side surface S7 is convex. The fifth lens L5 has positive power, its first side surface S8 is convex, and the second side surface S9 is convex.

[0289] Table 37 shows the curvature radius R, thickness / distance, refractive index Nd and dispersion coefficient Vd of each lens of the optical lens of Example 19.

[0290] Table 37

[0291] 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. The surface shape of each aspherical mirror surface can be defined by, but not limited to, the formula (1) given in the above embodiment 1.

[0292] Table 38 shows the conic coefficient (k) and higher-order coefficients that can be used for the aspheric mirror surface in this embodiment. A4 , A6 , A8 , A10 , A12 , A14 and A16 .

[0293] Table 38

[0294] Embodiment 20

[0295] The following reference Fig. 20 Describe the optical lens according to Example 20 of the present application.

[0296] like Fig. 20 As shown, the optical lens includes a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4 and a fifth lens L5 in sequence from the first side to the second side along the optical axis.

[0297] The first lens L1 has negative power, its first side surface S1 is convex, and the second side surface S2 is concave. The second lens L2 has positive power, its first side surface S3 is concave, and the second side surface S4 is convex. The third lens L3 has negative power, its first side surface S5 is concave, and the second side surface S6-1 is concave. The fourth lens L4 has positive power, its first side surface S6-2 is convex, and the second side surface S7 is convex. The fifth lens L5 has positive power, its first side surface S8 is convex, and the second side surface S9 is convex.

[0298] Table 39 shows the curvature radius R, thickness / distance, refractive index Nd and dispersion coefficient Vd of each lens of the optical lens of Example 20.

[0299] Table 39

[0300] 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. The surface shape of each aspherical mirror surface can be defined by, but not limited to, the formula (1) given in the above embodiment 1.

[0301] Table 40 shows the conic coefficient (k) and high-order coefficients that can be used for the aspheric mirror surface in this embodiment. A4 , A6 , A8 , A10 , A12 , A14 and A16 .

[0302] Table 40

[0303] Embodiment 21

[0304] The following reference Fig.21 Describe the optical lens according to Example 21 of the present application.

[0305] like Fig.21 As shown, the optical lens 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 in sequence from the first side to the second side along the optical axis, wherein the third lens L3 and the fourth lens L4 form a cemented lens.

[0306] The first lens L1 has negative power, its first side surface S1 is convex, and the second side surface S2 is concave. The second lens L2 has negative power, its first side surface S3 is concave, and the second side surface S4 is convex. The third lens L3 has positive power, its first side surface S5 is convex, and the second side surface S6 is convex. The fourth lens L4 has negative power, its first side surface S6 is concave, and the second side surface S7 is convex. The fifth lens L5 has positive power, its first side surface S8 is convex, and the second side surface S9 is convex.

[0307] In this embodiment, the optical lens can be used as, for example, a projection lens or a laser radar transmitting end lens. At this time, light from the image source plane IMA (S10) passes through the optical surfaces S9 to S1 in sequence and is finally projected onto a projection surface (not shown) disposed on the first side.

[0308] It should be understood that the optical lens provided in the present application can also be used as, for example, a vehicle-mounted lens. In this case, light from an object passes through each optical surface S1 to S9 in sequence and is finally imaged on an imaging surface IMA disposed on the second side, wherein an image sensor chip is disposed at the imaging surface IMA.

[0309] Table 41 shows the curvature radius R, thickness / distance, refractive index Nd and dispersion coefficient Vd of each lens of the optical lens of Example 21.

[0310] Table 41

[0311] In this embodiment, the first side surface S3 and the second side surface S4 of the second lens L2 and the first side surface S8 and the second side surface S9 of the fifth lens L5 of the optical lens are aspherical mirror surfaces. The surface shape of each aspherical mirror surface can be defined by, but not limited to, the formula (1) given in the above-mentioned embodiment 1.

[0312] Table 42 shows the conic coefficient (k) and high-order coefficients that can be used for the aspheric mirror surface in this embodiment. A4 , A6 , A8 , A10 , A12 , A14 and A16 .

[0313] Table 42

[0314] Tables 43 and 44 below respectively show some parameters of the optical lenses of Examples 1 to 10, and Examples 11 to 21, such as the focal length F, optical power φ, entrance pupil diameter ENPD, total optical length TTL, maximum field of view FOV, arc value θ corresponding to the maximum field of view, and focal length values ​​of each lens, etc. The units of each focal length value, distance or effective radius value are all millimeters (mm), and the unit of FOV is degree (°).

[0315] Table 43

[0316] Table 44

[0317] In summary, the optical lenses of the above-mentioned embodiments 1 to 10 respectively satisfy the conditional formula shown in Table 45 below, and the optical lenses of embodiments 11 to 21 respectively satisfy the conditional formula shown in Table 46 below.

[0318] Table 45

[0319] Table 46

[0320] Fig. 22 The MTF (Modulation Transfer Function) curve of the optical lens according to the embodiment of the present application is shown. Fig. 22 It can be seen that the optical lens has good contrast and clear imaging within a spatial frequency of 60 lp / mm (cycle / mm). Therefore, the optical lens according to the embodiment of the present application has high resolution and can achieve good imaging quality.

[0321] The present application also provides an electronic device, which may include an optical lens according to the above-mentioned embodiment of the present application and an imaging element for converting an optical image formed by the optical lens into an electrical signal. The electronic device may be an independent electronic device such as a detection distance camera, or an imaging module integrated in a device such as a detection distance device. In addition, the electronic device may also be an independent imaging device such as a vehicle-mounted camera, or an imaging module integrated in a driving assistance system such as a vehicle-mounted camera.

[0322] In addition, the present application also provides an electronic device, which may include an optical lens and a light source according to the above-mentioned embodiment of the present application, the light source may be located on the second side of the optical lens, the light emitted by the light source is projected to the first side of the optical lens after passing through the optical lens, and an image or an illuminated area is formed on the first side. The electronic device may be an emission / projection / projection lens, the light from the light source is projected to the object side after passing through the optical lens, and an image or an illuminated area is formed on the object side.

[0323] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. 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 a specific combination of the above technical features, but 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 above features are replaced with (but not limited to) technical features with 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; 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; A curvature radius R3 of the first side surface of the second lens, a curvature radius R4 of the second side surface of the second lens, and a center thickness d3 of the second lens satisfy: 0.5≤R4 / (R3-d3)≤1.

2.

2. The optical lens according to claim 1, characterized in that: The third lens has opposite refractive power to the fourth lens.

3. 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.

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

5. 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.

6. 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.

7. 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.

8. 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.

9. The optical lens according to any one of claims 1 to 8, 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: (FOV F) / H≥45°.

10. The optical lens according to any one of claims 1 to 8, characterized in that: The optical lens meets 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; 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.

11. The optical lens according to any one of claims 1 to 8, characterized in that: The back focal length BFL of the optical lens and the total optical length TTL of the optical lens satisfy: BFL / TTL≥0.

3.

12. The optical lens according to any one of claims 1 to 8, characterized in that: 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.

13. The optical lens according to any one of claims 1 to 8, characterized in that: The combined focal power φ3-5 of the third lens, the fourth lens and the fifth lens and the focal power φ of the optical lens satisfy the following condition: φ3-5 / φ≥0.

1.

14. The optical lens according to any one of claims 1 to 8, 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: 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: d8 / TL≤0.

01.

15. The optical lens according to any one of claims 1 to 8, 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: D9 BFL / H≥42mm.

16. The optical lens according to any one of claims 1 to 8, characterized in that: The focal length F2 of the second lens and the focal length F of the optical lens satisfy: |F2 / F|≥8.

17. The optical lens according to any one of claims 1 to 8, 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.

18. The optical lens according to any one of claims 1 to 8, 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.

19. The optical lens according to any one of claims 1 to 8, 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.

20. The optical lens according to any one of claims 1 to 8, characterized in that: A minimum focal length Fmin and a maximum focal length Fmax among the focal lengths of the third lens, the fourth lens and the fifth lens satisfy the following: 0.55≤|Fmin / Fmax|≤1.

3.

21. The optical lens according to any one of claims 1 to 8, 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.

22. The optical lens according to any one of claims 1 to 8, 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.

23. The optical lens according to any one of claims 1 to 8, 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.

24. The optical lens according to any one of claims 1 to 8, characterized in that: A curvature radius R2 of the second side surface of the first lens and a focal length F of the second lens satisfy: |R2 / F2|≤0.

08.

25. The optical lens according to any one of claims 1 to 8, 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.

26. The optical lens according to any one of claims 1 to 8, 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; 0.0841≤D / H / F ×1mm≤0.1249; 0.3614≤BFL / TTL≤0.4381; 0.5659≤BFL / TL≤0.7796; 1.4622≤F / H≤1.8 644; 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≤89.3136mm; -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, 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 of the aperture, T23 is the air spacing between the second lens and the third lens on the optical axis, φ3-5 is the combined focal length of the third lens, the fourth lens and the fifth lens, φ is the focal length 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 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, and F345 is the focal length of the fifth lens. 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 gap between the first lens and the second lens on the optical axis, and d3 is the center thickness of the second lens.

27. An electronic device, characterized in that: The optical lens according to any one of claims 1 to 26, 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