Optical lenses and electronic equipment

Abstract

The present application discloses an optical lens and an electronic device. The optical lens includes, in order from the first side to the second side along the optical axis: a first lens with negative optical power, whose first side surface is convex and whose second side surface is concave; a second lens, whose first side surface is concave and whose second side surface is convex; a third lens with positive optical power, whose first side surface is convex; a fourth lens; a fifth lens; a sixth lens, whose first side surface is convex and whose second side surface is concave; one of the fourth lens and the fifth lens has positive optical power, and the other has negative optical power. The effective focal length F6 of the sixth lens, the total effective focal length F, the center thickness d21 of the second lens on the optical axis, the center thickness d61 of the sixth lens on the optical axis, the distance BFL from the center of the second side surface of the sixth lens to the imaging plane on the optical axis, the effective focal length F2 of the second lens and the center thickness d11 of the first lens on the optical axis satisfy: |F6| / F≥2, (d21+d61) / BFL≤0.9, |F2| / F≥12 and 0.5≤d21 / d11≤1.5.

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] With the improvement of the imaging quality of optical lenses, optical lenses have been widely used in various fields. For example, optical lenses play an irreplaceable role in intelligent detection, security monitoring, smart phones, and car assisted driving. In order to meet the requirements of safe driving and special installation positions, compared with ordinary optical lenses, the vehicle-mounted lenses in the automatic driving assistance system have more special requirements.

[0003] In recent years, the automotive assisted driving system has developed rapidly. As one of the key components for the assisted driving system to obtain external information, the application of vehicle-mounted lenses in automobiles has become more and more extensive. At the same time, users' requirements for miniaturization of vehicle-mounted lenses have become more and more prominent.

[0004] At present, in order to improve the imaging quality of the lens, the market mostly adopts the method of increasing the number of lenses, but the lens structure with more lenses will increase the size and weight of the lens. In addition, the lens structure with more lenses will also bring the problem of too short back focus of the lens, and will also bring serious problems such as affecting the miniaturization of the lens and large lens distortion.

[0005] Therefore, the field is currently in urgent need of designing and developing an optical lens with some or all of the characteristics such as high resolution, miniaturization, long back focus and small distortion to meet the high requirements of the ever-evolving market applications. Summary of the invention

[0006] The present application provides an optical lens and an electronic device that can at least solve or partially solve at least one problem or other problems existing in the prior art.

[0007] The first aspect of 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 first side surface is convex and 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 positive optical power, whose first side surface is convex; a fourth lens with optical power; a fifth lens with optical power; and a sixth lens with optical power, whose first side surface is convex and whose second side surface is concave; wherein one of the fourth lens and the fifth lens has positive optical power and the other has negative optical power; wherein the number of lenses with optical power in the optical lens is six.

[0008] According to an exemplary embodiment of the present application, the second lens has positive or negative power.

[0009] According to an exemplary embodiment of the present application, the second side surface of the third lens is a convex surface or a concave surface.

[0010] According to an exemplary embodiment of the present application, the fourth lens and the fifth lens are cemented to form a cemented lens. As an example, the fourth lens has negative optical power, its first side is convex, and its second side is concave, and the fifth lens has positive optical power, its first side is convex, and its second side is convex. As an example, the fourth lens has negative optical power, its first side is concave, and its second side is concave, and the fifth lens has positive optical power, its first side is convex, and its second side is convex. As an example, the fourth lens has positive optical power, its first side is convex, and its second side is convex; the fifth lens has negative optical power, its first side is concave, and its second side is convex.

[0011] According to an exemplary embodiment of the present application, the sixth lens has positive or negative power.

[0012] According to an exemplary embodiment of the present application, the effective focal length F6 of the sixth lens and the total effective focal length F of the optical lens satisfy: |F6| / F≥2.

[0013] According to an exemplary embodiment of the present application, a center thickness d21 of the second lens on the optical axis, a center thickness d61 of the sixth lens on the optical axis, and a distance BFL from the center of the second side surface of the sixth lens to the imaging surface of the optical lens on the optical axis satisfy: (d21+d61) / BFL≤0.9.

[0014] According to an exemplary embodiment of the present application, the effective focal length F2 of the second lens and the total effective focal length F of the optical lens satisfy: |F2| / F≥12.

[0015] According to an exemplary embodiment of the present application, a center thickness d21 of the second lens on the optical axis and a center thickness d11 of the first lens on the optical axis satisfy: 0.5≤d21 / d11≤1.5.

[0016] According to an exemplary embodiment of the present application, a distance TTL from the first side surface of the first lens to the imaging surface of the optical lens on the optical axis and a total effective focal length F of the optical lens satisfy: TTL / F≤6.

[0017] According to an exemplary embodiment of the present application, the optical lens satisfies: MIN[F3, F+] / F≤5; wherein MIN[F3, F+] represents the smaller of the effective focal length F3 of the third lens and the positive effective focal length F+ of the fourth lens and the fifth lens, and F is the total effective focal length of the optical lens.

[0018] According to an exemplary embodiment of the present application, the positive effective focal length F+ of the fourth lens and the fifth lens and the total effective focal length F of the optical lens satisfy: F+ / F≤1.6.

[0019] According to an exemplary embodiment of the present application, the effective focal length F3 of the third lens and the total effective focal length F of the optical lens satisfy: F3 / F≤6.5.

[0020] According to an exemplary embodiment of the present application, the vector height sag21 at the maximum clear aperture of the first side surface of the second lens corresponding to the maximum field of view of the optical lens, the vector height sag22 at the maximum clear aperture of the second side surface of the second lens corresponding to the maximum field of view of the optical lens, and the center thickness d21 of the second lens on the optical axis satisfy: |sag21-sag22| / d21≤0.45.

[0021] According to an exemplary embodiment of the present application, the image height H corresponding to the maximum field angle of the optical lens, the total effective focal length F of the optical lens and the arc value θ of the maximum field angle of the optical lens satisfy: |H / (F×θ)-1|≤0.3.

[0022] According to an exemplary embodiment of the present application, a distance BFL from the center of the second side surface of the sixth lens to the imaging surface of the optical lens on the optical axis and a distance TTL from the first side surface of the first lens to the imaging surface of the optical lens on the optical axis satisfy: BFL / TTL≥0.2.

[0023] According to an exemplary embodiment of the present application, the effective focal length of the first lens and the total effective focal length F of the optical lens satisfy: -5≤F1 / F.

[0024] According to an exemplary embodiment of the present application, a combined focal length F45 of the fourth lens and the fifth lens and a total effective focal length F of the optical lens satisfy: F45 / F≤15.

[0025] According to an exemplary embodiment of the present application, the vector height sag61 at the maximum clear aperture of the first side surface of the sixth lens corresponding to the maximum field of view of the optical lens, the vector height sag62 at the maximum clear aperture of the second side surface of the sixth lens corresponding to the maximum field of view of the optical lens, and the center thickness d61 of the sixth lens on the optical axis satisfy: |sag61-sag62| / d61≤0.4.

[0026] According to an exemplary embodiment of the present application, a radius of curvature R61 of the first side surface of the sixth lens and a radius of curvature R62 of the second side surface of the sixth lens satisfy: 0<R61 / R62≤3.

[0027] According to an exemplary embodiment of the present application, a curvature radius R11 of the first side surface of the first lens and a curvature radius R12 of the second side surface of the first lens satisfy: R11 / R12≥3.

[0028] According to an exemplary embodiment of the present application, the distance TTL from the first side surface of the first lens to the imaging surface of the optical lens on the optical axis, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy: TTL / H / FOV×180°≤8.

[0029] According to an exemplary embodiment of the present application, the optical lens satisfies at least one of the following conditional expressions:

[0030] 4.5511≤TTL / F≤5.272;0.7972≤F+ / F≤1.136;1.2421≤F3 / F≤4.9701;0.7972≤MIN[F3、F+] / F≤1.136;d31×F3 / (TTL×F)≤0.8;0.1726≤d31×F3 / (TTL×F)≤0.4231;(|F4|+|F5|) / F≤5;1.5753≤(|F4|+|F5|) / F≤3.0486;(d41+d51)×(|F4|+|F5|) / (TTL×F)≤1.2;0.2999≤(d41+d51)×(|F4|+|F5|) / (TTL×F)≤0.7406;0.0952≤|sag21-sag22| / d21≤0.3069;15.0929≤|F2| / F≤85.6255;0.0123≤|H / (F×θ)-1|≤0.1085;6.5102≤|F6| / F≤58.7468;0.5615≤(d21+d61) / BFL≤0.6878;0.2332≤BFL / TTL≤0.2654;arctan(|sag62 / D62|)≤10°;0.0474°≤arctan(|sag62 / D62|)≤4.6663°;-1.6376≤F1 / F≤-1.3456;1.7903≤F45 / F≤9.5002;0.03≤d11 / TTL≤0.5;0.0612≤d11 / TTL≤0.073;0.0026≤|sag61-sag62| / d61≤0.1266;0.0248≤R61 / R62≤1.1694;4.3273≤R11 / R12≤430.8011;F / ENPD≤2;3.6213≤TTL / H / FOV×180°≤4.368;D / H / FOV×180°≤6;1.4948≤D / H / FOV×180°≤2.0054;0.2≤F / H≤1.2;0.4928≤F / H≤0.5693;(FOV×F) / H≥50°;56.6002°≤(FOV×F) / H≤64.2683°;0<R21 / R22≤2;0.7738≤R21 / R22≤0.9011;sag11 / R11≤0.06;0.0000019≤sag11 / R11≤0.041;1.066≤d21 / d11≤1.3481;R11 / F1≤-2.1;-333.5198≤R11 / F1≤-2.5593;0.3≤|F+ / F-|≤1.5;0.4967≤|F+ / F-|≤1.0894。

[0031] According to an exemplary embodiment of the present application, the optical lens satisfies at least one of the following conditional expressions:

[0032] 4.3≤TTL / F≤5.5; 0.7≤F+ / F≤1.25; 0.5≤F3 / F≤6.5; 0.7≤MIN[F3, F+] / F≤1.3; 0.1≤d31× F3 / (TTL×F)≤0.5; 1≤(|F4|+|F5|) / F≤3.5; 0.15≤(d41+d51)×(|F4|+|F5|) / (TTL×F)≤ 0.9; 0.05≤|sag21-sag22| / d21≤0.4; 12≤|F2| / F≤120; 0.005≤|H / (F×θ)-1|≤0.165; 2 ≤|F6| / F≤90; 0.5≤(d21+d61) / BFL≤0.72; 0.22≤BFL / TTL≤0.275; arctan(|sag62 / D62 |)≤7.5°; -1.75≤F1 / F≤-1.25; 0.5≤F45 / F≤13; 0.055≤d11 / TTL≤0.08; |sag61-sag62| / d61≤0.2; 0<R61 / R62≤2; 3≤R11 / R12≤700; 1.8≤F / ENPD≤1.9; 3.3≤TTL / H / FOV×180°≤4 .5; 1.3≤D / H / FOV×180°≤2.15; 0.45≤F / H≤0.6; 55°≤(FOV×F) / H≤67°; 0.72≤R21 / R22≤0 .95; sag11 / R11≤0.068; 0.95≤d21 / d11≤1.4; -550≤R11 / F1≤-2.1; 0.3≤|F+ / F-|≤1.3;

[0033] TTL is the distance from the first side surface of the first lens to the imaging surface of the optical lens on the optical axis, F is the total effective focal length of the optical lens, F+ is the positive effective focal length of the fourth lens and the fifth lens, F3 is the effective focal length of the third lens, MIN[F3, F+] represents the smaller of the effective focal length F3 of the third lens and the positive effective focal length F+ of the fourth lens and the fifth lens, F- is the negative effective focal length of the fourth lens and the fifth lens, d31 is the center thickness of the third lens on the optical axis, F4 is the effective focal length of the fourth lens, F5 is the effective focal length of the fifth lens, and d41 is the center thickness of the fourth lens on the optical axis. thickness, d51 is the center thickness of the fifth lens on the optical axis, sag21 is the sag height at the maximum clear aperture of the first side of the second lens corresponding to the maximum field of view of the optical lens, sag22 is the sag height at the maximum clear aperture of the second side of the second lens corresponding to the maximum field of view of the optical lens, F2 is the effective focal length of the second lens, H is the image height corresponding to the maximum field of view of the optical lens, θ is the radian value of the maximum field of view of the optical lens, F6 is the effective focal length of the sixth lens, d21 is the center thickness of the second lens on the optical axis, d61 is the center thickness of the sixth lens on the optical axis, and BFL is the sixth The distance from the center of the second side surface of the lens to the imaging surface of the optical lens on the optical axis, sag62 is the sag height at the maximum clear aperture of the second side surface of the sixth lens corresponding to the maximum field of view of the optical lens, D62 is the maximum clear aperture of the second side surface of the sixth lens corresponding to the maximum field of view of the optical lens, F1 is the effective focal length of the first lens, F45 is the combined focal length of the fourth lens and the fifth lens, d11 is the center thickness of the first lens on the optical axis, sag61 is the sag height at the maximum clear aperture of the first side surface of the sixth lens corresponding to the maximum field of view of the optical lens, and R61 is the first side of the sixth lens R62 is the radius of curvature of the second side surface of the sixth lens, ENPD is the entrance pupil diameter of the optical lens, FOV is the maximum field of view of the optical lens, D is the maximum clear aperture of the first side surface of the first lens corresponding to the maximum field of view of the optical lens, R21 is the radius of curvature of the first side surface of the second lens, R22 is the radius of curvature of the second side surface of the second lens, R11 is the radius of curvature of the first side surface of the first lens, R12 is the radius of curvature of the second side surface of the first lens, and sag11 is the sag height at the maximum clear aperture of the first side surface of the first lens corresponding to the maximum field of view of the optical lens.

[0034] Another aspect of the present application provides an electronic device including the optical lens in the above exemplary embodiment and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

[0035] The optical lens according to the embodiment of the present application includes six lenses with optical power, which are respectively a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens arranged in sequence from the first side to the second side along the optical axis, wherein the first lens with negative optical power has a convex first side surface and a concave second side surface; the second lens with optical power has a concave first side surface and a convex second side surface; the third lens with positive optical power has a convex first side surface; the fourth lens with optical power; the fifth lens with optical power; the sixth lens with optical power has a convex first side surface and a concave second side surface; one of the fourth lens and the fifth lens has a positive optical power, and the other has a negative optical power. degree; by performing the above settings on the lens, the effective focal length F6 of the sixth lens and the total effective focal length F of the optical lens are controlled to satisfy |F6| / F≥2; the center thickness d21 of the second lens on the optical axis and the center thickness d61 of the sixth lens on the optical axis satisfy (d21+d61) / BFL≤0.9; the effective focal length F2 of the second lens and the total effective focal length F of the optical lens satisfy |F2| / F≥12, the center thickness d21 of the second lens on the optical axis and the center thickness d11 of the first lens on the optical axis satisfy 0.5≤d21 / d11≤1.5, so that the optical lens can achieve at least one of the beneficial effects of high imaging quality and miniaturization, high resolution and small distortion, long back focus, etc.

[0036] According to the optical lens of the embodiment of the present application, the second lens with optical power has a first side surface that is concave and a second side surface that is convex; the sixth lens with optical power has a first side surface that is convex and a second side surface that is concave; by performing the above-mentioned settings on the lens, the effective focal length F2 of the second lens and the total effective focal length F of the optical lens are controlled to satisfy |F2| / F≥12, and the effective focal length F6 of the sixth lens and the total effective focal length F of the optical lens are controlled to satisfy |F6| / F≥2; the center thickness d21 of the second lens on the optical axis and the center thickness d61 of the sixth lens on the optical axis satisfy (d21+d61) / BFL≤0.9, which is beneficial to reducing the sensitivity of the optical lens and achieving at least one of the beneficial effects of the optical lens such as high imaging quality and long back focus.

[0037] The present application adopts six lenses with optical focal length, and by optimizing the shape and optical focal length of each lens, at least one of the beneficial effects of the optical lens such as miniaturization, low sensitivity, high resolution, small distortion, back focal length, and small aperture can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings, in which:

[0039] Figure 1A schematic structural diagram of an optical lens according to Embodiment 1 of the present application is shown;

[0040] Figure 2 shows a modulation transfer function curve of the optical lens according to Example 1 of the present application;

[0041] Figure 3 shows a distortion curve of the optical lens according to Example 1 of the present application;

[0042] Figure 4 A schematic structural diagram of an optical lens according to Embodiment 2 of the present application is shown;

[0043] Figure 5 shows a distortion curve of the optical lens according to Example 2 of the present application;

[0044] Figure 6 A schematic structural diagram of an optical lens according to Embodiment 3 of the present application is shown;

[0045] Figure 7 shows a distortion curve of the optical lens according to Example 3 of the present application;

[0046] Figure 8 A schematic structural diagram of an optical lens according to Embodiment 4 of the present application is shown;

[0047] Fig. 9 shows a distortion curve of the optical lens according to Example 4 of the present application;

[0048] Fig.10 A schematic structural diagram of an optical lens according to Embodiment 5 of the present application is shown;

[0049] Fig.11 shows a distortion curve of the optical lens according to Example 5 of the present application;

[0050] Fig.12 A schematic structural diagram of an optical lens according to Embodiment 6 of the present application is shown;

[0051] Fig.13 shows a distortion curve of the optical lens according to Example 6 of the present application;

[0052] Fig.14 A schematic structural diagram of an optical lens according to Embodiment 7 of the present application is shown;

[0053] Fig.15 shows a distortion curve of the optical lens according to Example 7 of the present application;

[0054] Fig.16 A schematic structural diagram of an optical lens according to Example 8 of the present application is shown;

[0055] Fig.17 shows a distortion curve of the optical lens according to Example 8 of the present application;

[0056] Fig.18 A schematic structural diagram of an optical lens according to Example 9 of the present application is shown;

[0057] Fig.19 shows a distortion curve of the optical lens according to Example 9 of the present application;

[0058] Fig. 20 A schematic structural diagram of an optical lens according to Embodiment 10 of the present application is shown;

[0059] Fig.21 shows a distortion curve of the optical lens according to Example 10 of the present application;

[0060] Fig. 22 A schematic structural diagram of an optical lens according to Example 11 of the present application is shown;

[0061] Fig.23 shows a distortion curve of the optical lens according to Example 11 of the present application;

[0062] Fig.24 A schematic structural diagram of an optical lens according to Embodiment 12 of the present application is shown;

[0063] Fig.25 The distortion curve of the optical lens according to Example 12 of the present application is shown. DETAILED DESCRIPTION

[0064] In order to better understand the present application, a more detailed description will be made of various aspects of the present application with reference to the accompanying 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 numerals refer to the same elements.

[0065] 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.

[0066] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the drawings. The drawings are for illustration only and are not drawn strictly to scale.

[0067] 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, and the surface of each lens closest to the second side is called the second side surface of the lens.

[0068] It should also be understood that the terms "include", "comprising", and / or "having", 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 describing embodiments of the present application, the term "may" is used to indicate "one or more embodiments of the present application". Furthermore, the term "exemplary" is intended to refer to an example or illustration.

[0069] 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 the same meaning as 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.

[0070] 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.

[0071] The features, principles and other aspects of the present application are described in detail below.

[0072] The optical lens according to an exemplary embodiment of the present application may include, for example, six lenses with optical power, namely a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens, and the six lenses are arranged in sequence from the first side to the second side along the optical axis.

[0073] In an exemplary embodiment, the first lens may have a negative optical focal length, and its first side surface may be, for example, a convex surface, and the second side surface may be, for example, a concave surface. The first lens is a negative lens, which has a divergent effect on light, collects light at a large angle as much as possible, and enables the rear optical lens to have a larger light throughput. The first lens is a positive lens convex to the first side, which can collect light at a large angle as much as possible to enter the system, and achieve a large field of view. The second side surface of the first lens is a concave surface, which can quickly diverge the large-angle light passing through the first side surface of the first lens. The light emitted through the second side surface of the first lens can enable the subsequent optical lens to have a larger light receiving surface, which is conducive to achieving small distortion and high resolution of the optical lens. In addition, the first side surface of the first lens is a convex surface, which can also facilitate the sliding of water droplets in practical applications and reduce the influence of these substances on imaging. In other examples, the first lens is made of a high refractive index material, which is conducive to reducing the front port diameter of the system and improving the imaging quality of the optical lens.

[0074] In an exemplary embodiment, the second lens may have a negative optical focal length, and its first side surface may be, for example, a concave surface, and the second side surface may be, for example, a convex surface. The second lens is a negative lens, which collects the light emitted from the first lens and further diverges it smoothly, which is beneficial to expand the width of the light and make the light reach the required size for imaging. The first side surface of the second lens is a concave surface, which can cooperate with the second side surface of the first lens so that the light from the second side surface of the first lens is smoothly received and diverged, so that the light can be emitted smoothly, which is beneficial to improve aberrations. The second side surface of the second lens is a convex surface, which can reduce the incident height of large-angle light, reduce the diameter of the rear port of the lens, reduce the total length of the optical lens, and make the light of different fields of view tend to be parallel. At the same time, the aberration is corrected, so that the light enters the rear optical lens more smoothly, which is beneficial to improve the imaging quality.

[0075] In other exemplary embodiments, the second lens may have positive focal power, and its first side surface may be, for example, a concave surface, and its second side surface may be, for example, a convex surface. The second lens is a positive lens, which can further converge the light and lower the height of the peripheral light, which is conducive to reducing the aperture of the rear lens. The first side surface of the second lens is a concave surface, which can cooperate with the second side surface of the first lens, so that the light from the second side surface of the first lens is smoothly received and diverged, so that the light can be emitted smoothly, which is conducive to improving aberrations. In addition, the first side surface of the second lens appropriately diverges the upward light emitted from the second side surface of the first lens, so that the peripheral light can transition smoothly and reach a higher imaging position, which is conducive to reducing the sensitivity of the lens and increasing the amount of light.

[0076] In an exemplary embodiment, the third lens may have positive focal power, and its first side surface may be, for example, a convex surface, and its second side surface may be, for example, a convex surface. The third lens is a positive lens, which can collect the light emitted from the second lens as much as possible, lower the height of the peripheral light, and is conducive to reducing the diameter of the rear lens. At the same time, the third lens is a biconvex shape, which can realize the double convergence of the light, and can smoothly transfer the light collected by the front system to the rear system, which is conducive to the preliminary aberration correction of the incident light, reduces the sensitivity of the system, and can make the light smoothly transition to the rear system. At the same time, it can also appropriately converge and gather the light to reduce the rear port diameter of the optical lens.

[0077] In other exemplary embodiments, the first side of the third lens may be, for example, a convex surface, and the second side may be, for example, a concave surface. The first side of the third lens is a convex surface, which can compress the height of the light incident through the third lens and avoid the divergence of the light as much as possible, which is conducive to miniaturization of the optical lens and reducing the sensitivity of the optical lens. It is also conducive to correcting chromatic aberration and improving the resolution of the optical lens. The second side of the third lens is a concave surface, which can receive and diverge the light from the front lens, increase the height and width of the edge field of view light beam when it reaches the fourth lens, and effectively improve the relative illumination of the edge field of view. The third lens is in the shape of a meniscus, which can make the two surfaces have smaller changes under temperature changes, thereby improving the sensitivity of the optical lens.

[0078] In an exemplary embodiment, the fourth lens may have a negative optical power, and its first side surface may be, for example, a concave surface, and its second side surface may be, for example, a concave surface. The fourth lens is a negative lens, which is conducive to receiving light from the third lens, and the negative lens has a divergent effect on the light, so that the rear optical lens has a larger light receiving surface. At the same time, the reasonable distribution of optical power is conducive to reducing aberrations and improving the optical performance of the optical lens. The fourth lens is a concave-convex shape, which can effectively diverge light. Under the same image height, the height of the outgoing light of the fourth lens can be reduced, the aperture of the fourth lens can be reduced, and the small chief ray angle (Chief Ray Angle, CRA) of the optical lens can be adjusted to adapt the optical lens to different lenses. In addition, the fourth lens is a negative lens, and by using it in conjunction with the fifth lens with positive optical power, it can effectively correct system aberrations, improve imaging quality, and optimize optical properties such as distortion and small chief ray angle.

[0079] In an exemplary embodiment, the first side surface of the fourth lens may be, for example, a convex surface, and the second side surface may be, for example, a concave surface. The first side surface of the fourth lens is a convex surface, which can appropriately converge and gather light, receive the light emitted from the third lens and compress the height of the incident light, which is beneficial to the smooth transition of the light trend of the entire system and reduce the lens aperture at the rear end. At the same time, the height of the light in the optical lens is compressed, and a larger lens edge thickness is provided as much as possible when the middle thickness space of the optical lens is limited, thereby achieving better mechanical properties of the optical lens. The second side surface of the fourth lens is a concave surface, which appropriately diverges the light emitted from the third lens, and increases the incident angle of the light in the peripheral field of view to the first side surface of the fifth lens as much as possible, which is beneficial to improving the relative illumination of the peripheral field of view.

[0080] In an exemplary embodiment, the fourth lens may have positive power, and its first side surface may be, for example, a convex surface, and its second side surface may be, for example, a convex surface. The fourth lens is a biconvex positive lens, which has a converging effect on the light received from the third lens, and is used in conjunction with the fifth lens having a negative power. By adjusting the optical path difference between light rays of different fields of view, the aberration of the optical lens can be effectively corrected, the imaging quality can be improved, and the optical properties such as imaging distortion and small main light angle can be optimized. At the same time, the received light trend can be smoothly transitioned, which is conducive to reducing the aperture of the optical lens, reducing the sensitivity of the optical lens, reducing the deflection of the light on the second side surface of the fourth lens, and effectively reducing the generation of aberrations on the fourth lens and the fifth lens, thereby enhancing the correction effect of chromatic aberration.

[0081] In an exemplary embodiment, the fifth lens may have positive focal length, and its first side surface may be, for example, a convex surface, and its second side surface may be, for example, a convex surface. The fifth lens is a positive lens, which is conducive to the rapid convergence of light, and combined with the fourth lens having a negative focal length, it can further reduce aberrations and improve the resolution of the optical lens, and at the same time, it is conducive to the light being effectively and smoothly converged at the end and reaching the imaging surface. The fifth lens is biconvex, which can compress the light incident through the fourth lens and make it smoothly incident on the sixth lens, and cooperate with the sixth lens whose first side surface is a convex surface to further correct the field curvature, reduce the sensitivity of the optical lens, and make the light reach the imaging surface smoothly. At the same time, it can also appropriately converge the divergent light and converge it to the rear lens, and can also make the light turn and gather to achieve faster arrival at the imaging surface, reducing the total length of the lens.

[0082] In an exemplary embodiment, the fifth lens may have a negative optical focal length, and its first side surface may be, for example, a concave surface, and its second side surface may be, for example, a convex surface. The fifth lens is a negative lens, which collects the light emitted from the fourth lens and appropriately diverges the light, so that the rear system has a larger light receiving surface, and cooperates with the fourth lens with positive optical focal length, which can effectively correct aberrations and improve the resolution of the optical lens. The first side surface of the fifth lens is a concave surface, which is conducive to receiving the light emitted from the fourth lens and appropriately diverging the light converged by the third lens and the fourth lens, so that the light can reach a higher imaging position, which is conducive to the realization of a small principal light angle of the optical lens. The second side surface of the fifth lens is a convex surface, which smoothly converges the optics, can effectively shorten the distance for the light to reach the imaging surface, is conducive to reducing the total length of the optical lens, and can effectively reduce the diameter of the rear port of the lens.

[0083] In an exemplary embodiment, the fourth lens is cemented with the fifth lens to form a cemented lens.

[0084] In an exemplary embodiment, the sixth lens may have positive optical power, and its first side surface may be, for example, a convex surface, and its second side surface may be, for example, a concave surface. The sixth lens is a positive lens, which can realize the rapid convergence of light to the imaging surface, slow down the upward trend of light, and reduce the difference between the light reaching the image surface and the main light angle of the back-end chip, thereby reducing the loss of light energy, which is beneficial to improving the illumination of the edge field of view and reducing the total length of the optical lens. The first side surface of the sixth lens is a convex surface, which can collect the light emitted from the fifth lens as much as possible, and cooperate with the fifth lens whose second side surface is a convex surface, which is beneficial to the smooth transition of the light trend of the entire system and reduces the sensitivity of the optical lens. The second side surface of the sixth lens is a concave surface, which collects the light emitted from the fifth lens and appropriately diverges its central light, so that the central light can reach a higher imaging position, which is beneficial to the smooth transition of the light trend of the entire system and effectively corrects the field curvature.

[0085] In an exemplary embodiment, the sixth lens may have a negative optical power, and its first side surface may be, for example, a convex surface, and its second side surface may be, for example, a concave surface. The sixth lens is a negative lens, which collects the light emitted from the fifth lens and appropriately diverges its central light, achieves a long-distance back focus to a certain extent, and can disperse the central light and the edge light of each field of view, improve the relative illumination of the optical lens, and is conducive to correcting the aberration of the edge light and the central light, thereby achieving high resolution of the optical lens. In addition, the angle at which the light is incident on the imaging surface meets the requirement of a small principal light angle, thereby improving the resolution ability and relative illumination of the optical lens.

[0086] In an exemplary embodiment, the first side surface and the second side surface of the sixth lens each have at least one inflection point.

[0087] In an exemplary embodiment, the optical lens may further include an aperture, which may be, for example, disposed between the third lens and the fourth lens. By disposing the aperture between the third lens and the fourth lens, it is beneficial for the light to smoothly transition to the rear of the system, reduce the aperture of the rear lens, and reduce the assembly sensitivity of the optical lens. It should be understood that the aperture is disposed between the third lens and the fourth lens for exemplary purposes only, and the present application does not impose any specific limitation thereto, and the aperture may also be disposed at other positions according to actual needs.

[0088] In an exemplary embodiment, the optical lens may further include a photosensitive element disposed on the second side. Optionally, the photosensitive element disposed on the second side may be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS).

[0089] In an exemplary embodiment, the effective focal length F6 of the sixth lens satisfies the total effective focal length F of the optical lens: |F6| / F≥2. Preferably, the effective focal length F6 of the sixth lens satisfies the total effective focal length F of the optical lens: 2≤|F6| / F≤90. Reasonably controlling the ratio of the effective focal length of the sixth lens to the total effective focal length of the optical lens and configuring the effective focal length of the sixth lens to a larger value is conducive to reducing the middle thickness of the sixth lens, realizing the miniaturization and back focal length of the optical lens; at the same time, reducing the influence of the surface shape change on the light, reducing the sensitivity, and making the light transition to the rear system as smoothly as possible, thereby realizing effective convergence of light or reducing the divergence and deflection angle of light, and realizing a small main light angle of the optical lens. In addition, controlling the exit angle of the light from the second side within a certain range is conducive to correcting the lens aberration, reducing the sensitivity of the lens, and correcting the chromatic aberration of the optical lens, which is conducive to improving the imaging quality of the optical lens. Furthermore, the effective focal length F6 of the sixth lens and the total effective focal length F of the optical lens satisfy: 6.5102≤|F6| / F≤58.7468, which is beneficial to correcting the aberration of the optical lens and reducing the sensitivity of the optical lens.

[0090] In an exemplary embodiment, the effective focal length F2 of the second lens and the total effective focal length F of the optical lens satisfy: |F2| / F≥12. Reasonable configuration of the second lens with a larger focal length can reduce the impact of temperature changes on the focal length of the lens, thereby reducing the sensitivity of the optical lens. Preferably, the effective focal length F2 of the second lens and the total effective focal length F of the optical lens satisfy: 12≤|F2| / F≤120. By configuring the second lens to have a larger focal length and cooperating with the first lens with positive optical power and the third lens with negative optical power, a smooth transition of light from the first lens to the third lens can be achieved. At the same time, it is beneficial to reduce the deflection of light, reduce the center thickness of the second lens, and facilitate miniaturization of the optical lens. Further, the effective focal length F2 of the second lens and the total effective focal length F of the optical lens satisfy: 15.0929≤|F2| / F≤85.6255, which is beneficial to miniaturization of the optical lens.

[0091] In an exemplary embodiment, the combined focal length F45 of the fourth lens and the fifth lens and the total effective focal length F of the optical lens satisfy: F45 / F≤15. The fourth lens and the fifth lens can be cemented to form a cemented lens. By configuring the combined focal length of the fourth lens and the fifth lens to be positive, and controlling the ratio of the combined focal length of the fourth lens and the fifth lens to the total effective focal length of the optical lens to be within a certain range, on the one hand, it is beneficial for light to converge to the image plane, thereby achieving a smaller total optical length, making the structure of the optical lens compact, and achieving a long back focus; on the other hand, by controlling the light trends inside and out of the fourth lens and the fifth lens, the aberration of the optical lens can be effectively corrected, the sensitivity of the lens can be reduced, and the chromatic aberration of the light lens can be corrected, thereby improving the imaging quality of the lens. Preferably, the combined focal length F45 of the fourth lens and the fifth lens and the total effective focal length F of the optical lens satisfy: 0.5≤F45 / F≤13; more specifically, F45 and F can satisfy: 1.7903≤F45 / F≤9.5002. By cooperating with the third lens having a positive focal power and the fourth lens and the fifth lens, the continuous convergence of light can be ensured, which is conducive to miniaturization. At the same time, the fourth lens and the fifth lens are matched with the sixth lens with a larger focal length, which is conducive to the fourth lens and the fifth lens converging light in advance, and is conducive to the smooth transition of light to the image plane, reducing aberrations and improving resolution. Setting the lower limit of the ratio of the conditional formula can avoid the focal length of the combined lens being too small, and can make the light smoothly transition to the rear system as much as possible, increase the optical performance of the lens, and improve the imaging quality. In addition, if the focal length of the combined lens is too small, it will also cause uneven thickness of the peripheral part and the central part of the combined lens, thereby generating aberrations. At the same time, by controlling the upper limit of the ratio of the conditional formula, it is conducive to reducing aberrations and improving the resolution of the optical lens.

[0092] In an exemplary embodiment, the distance TTL from the first side surface of the first lens to the imaging surface of the optical lens on the optical axis and the total effective focal length F of the optical lens satisfy: TTL / F≤6. Preferably, the distance TTL from the first side surface of the first lens to the imaging surface of the optical lens on the optical axis and the total effective focal length F of the optical lens satisfy: 4.3≤TTL / F≤5.5. Reasonable configuration of the relationship between the distance from the first side surface of the first lens to the second side surface of the sixth lens and the total effective focal length of the optical lens is conducive to miniaturization of the optical lens, while also being able to achieve the telephoto characteristics of the optical lens. Further, the distance TTL from the first side surface of the first lens to the imaging surface of the optical lens on the optical axis and the total effective focal length F of the optical lens satisfy: 4.5511≤TTL / F≤5.272, and by further constraining the range of the conditional formula, it is conducive to miniaturization of the optical lens.

[0093] In an exemplary embodiment, the optical lens satisfies: MIN[F3, F+] / F≤5, wherein MIN[F3, F+] represents the smaller of the effective focal length F3 of the third lens and the positive effective focal length F+ of the fourth lens and the fifth lens, and F is the total effective focal length of the optical lens. The third lens or the fourth lens and the fifth lens can effectively converge light, and reducing the focal length of any of the lenses is conducive to quickly converging light, reducing the total length and rear port diameter of the optical lens, and realizing miniaturization of the optical lens. Preferably, the smaller of the effective focal length F3 of the third lens and the positive effective focal length F+ of the fourth lens and the fifth lens MIN[F3, F+] and the total effective focal length F of the optical lens satisfy: 0.7≤MIN[F3, F+] / F≤1.3, and more specifically, when 0.7972≤MIN[F3, F+] / F≤1.136, it is conducive to relieving the convergence pressure of the front lens, realizing a smooth transition of light as much as possible while realizing miniaturization, and improving the resolution ability of the optical lens. In addition, by controlling the lower limit of the control condition, it is possible to avoid the effective focal length of a positive lens with a smaller focal length being too small or the total effective focal length of the optical lens being too large, which is beneficial to improving the imaging quality while achieving miniaturization of the optical lens.

[0094] In an exemplary embodiment, the positive effective focal length F+ of the cemented lens in the optical lens and the total effective focal length F of the optical lens satisfy: F+ / F≤1.6. By configuring the fourth lens and the fifth lens with a smaller focal length of the lens with positive focal power, it is beneficial to quickly converge the light and further reduce the total length and back port diameter of the optical lens. At the same time, by configuring the lens with positive focal power to have a smaller focal length, it is beneficial to relieve the pressure of the front lens to converge the light, and while achieving miniaturization, it is beneficial to the smooth transition of the light at the front end and improve the resolution of the optical lens. Preferably, the positive effective focal length F+ of the cemented lens in the optical lens and the total effective focal length F of the optical lens satisfy: 0.7≤F+ / F≤1.25. By setting the lower limit of the conditional expression, it is possible to avoid the total effective focal length of the optical lens being too large or the effective focal length of the lens with positive focal power being too small, which is beneficial to miniaturization of the optical lens and improves the resolution of the optical lens. Furthermore, the positive effective focal length F+ of the cemented lens in the optical lens and the total effective focal length F of the optical lens satisfy: 0.7972≤F+ / F≤1.136. By setting the conditional expression, it is beneficial to realize the miniaturization and high resolution of the optical lens.

[0095] In an exemplary embodiment, the effective focal length F3 of the third lens and the total effective focal length F of the optical lens satisfy: F3 / F≤6.5. By configuring the third lens to have a positive focal power and a smaller focal length, the light rays that diverge and rise in the front can be turned, which is conducive to faster convergence of the light rays in the lens, while preventing the light rays emitted in the front from further diverging, thereby reducing the total optical length and the rear aperture. While receiving as much light as possible, light loss is avoided, thereby improving the imaging quality of the optical lens. Preferably, the effective focal length F3 of the third lens and the total effective focal length F of the optical lens satisfy: 0.5≤F3 / F≤6.5, which is conducive to reducing the total length of the optical lens and reducing the front aperture of the optical lens. By setting a lower limit of the ratio of the third lens to the total effective focal length of the optical lens, it is avoided that the effective focal length of the third lens is too small or the total effective focal length of the optical lens is too large, which is conducive to improving the imaging quality and realizing the miniaturization of the optical lens. In addition, the second side surface of the second lens is convex, and the positive combined focal length of the fourth lens and the fifth lens converges the light, which is conducive to the smooth transition of the light to the rear system and reduces the sensitivity of the optical lens to a certain extent. Further, the effective focal length F3 of the third lens and the total effective focal length F of the optical lens satisfy: 1.2421≤F3 / F≤4.9701. By further constraining the conditional formula, it is helpful to reduce the sensitivity of the optical lens.

[0096] In an exemplary embodiment, the vector height sag21 at the maximum clear aperture of the first side surface of the second lens corresponding to the maximum field angle of the optical lens, the vector height sag22 at the maximum clear aperture of the second side surface of the second lens corresponding to the maximum field angle of the optical lens, and the center thickness d21 of the second lens on the optical axis satisfy: |sag21-sag22| / d21≤0.45. Preferably, the vector height sag21 at the maximum clear aperture of the first side surface of the second lens corresponding to the maximum field angle of the optical lens, the vector height sag22 at the maximum clear aperture of the second side surface of the second lens corresponding to the maximum field angle of the optical lens, and the center thickness d21 of the second lens on the optical axis satisfy: 0.05≤|sag21-sag22| / d21≤0.4. Reasonable configuration of the relationship between the vector height at the maximum clear aperture of the first side surface of the second lens, the vector height at the maximum clear aperture of the second side surface of the second lens, and the center thickness of the second lens on the optical axis can ensure that the proportion of the second lens is more uniform, and at the same time ensure that the imaging effect of the second lens in low temperature environment and high temperature environment changes little, and can achieve low sensitivity of the optical lens. In addition, the surface of the second lens is relatively flat, which is conducive to more uniform radial force on the lens. Furthermore, the vector height sag21 at the maximum light aperture of the first side surface of the second lens corresponding to the maximum field of view of the optical lens, the vector height sag22 at the maximum light aperture of the second side surface of the second lens corresponding to the maximum field of view of the optical lens, and the center thickness d21 of the second lens on the optical axis satisfy: 0.0952≤|sag21-sag22| / d21≤0.3069. By constraining the above conditional expression, it is conducive to achieving low sensitivity of the optical lens.

[0097] In an exemplary embodiment, the image height H corresponding to the maximum field angle of the optical lens, the total effective focal length F of the optical lens, and the radian value θ of the maximum field angle of the optical lens satisfy: |H / (F×θ)-1|≤0.3. Preferably, the image height H corresponding to the maximum field angle of the optical lens, the total effective focal length F of the optical lens, and the radian value θ of the maximum field angle of the optical lens satisfy: 0.005≤|H / (F×θ)-1|≤0.165. Reasonable configuration of the relationship between the image height corresponding to the maximum field angle of the optical lens, the total effective focal length of the optical lens, and the radian value of the maximum field angle of the optical lens can effectively control the ratio of the actual image height of the optical lens to the theoretical image height to approach 1, which is beneficial to the distortion of the optical lens and improves the resolution capability of the optical lens. Furthermore, the image height H corresponding to the maximum field angle of the optical lens, the total effective focal length F of the optical lens and the arc value θ of the maximum field angle of the optical lens satisfy: 0.0123≤|H / (F×θ)-1|≤0.1085, which is beneficial to correcting the distortion of the optical lens and improving the resolution capability of the optical lens.

[0098] In an exemplary embodiment, the distance BFL from the center of the second side surface of the sixth lens to the imaging surface of the optical lens on the optical axis and the distance TTL from the first side surface of the first lens to the imaging surface of the optical lens on the optical axis satisfy: BFL / TTL≥0.2. Preferably, the distance BFL from the center of the second side surface of the sixth lens to the imaging surface of the optical lens on the optical axis and the distance TTL from the first side surface of the first lens to the imaging surface of the optical lens on the optical axis satisfy: 0.22≤BFL / TTL≤0.275. By controlling the ratio of the distance from the center of the second side surface of the sixth lens to the imaging surface of the optical lens on the optical axis to the distance between the first side surface of the first lens and the second side surface of the sixth lens within a certain range, a long-distance back focus and miniaturization of the optical lens can be achieved. Furthermore, 0.2332≤BFL / TTL≤0.2654, by further constraining the range of the conditional formula, is conducive to achieving a long-distance back focus and miniaturization of the optical lens.

[0099] In an exemplary embodiment, the effective focal length F1 of the first lens and the total effective focal length F of the optical lens satisfy: -5≤F1 / F. The relationship between the effective focal length of the first lens and the total effective focal length of the optical lens is reasonably configured, and the first lens is a negative lens with a smaller focal length, which is conducive to the rapid divergence of light, thereby making the rear lens have a larger light receiving surface and reducing the generation of distortion; and it is also conducive to reducing the air gap between the first lens and the second lens, reducing the total length of the optical lens, and at the same time, when the light receiving surface is the same, the first lens is configured to have a negative optical power, which is conducive to achieving a small aperture at the front end of the first lens. Preferably, the effective focal length F1 of the first lens and the total effective focal length F of the optical lens satisfy: -1.75≤F1 / F≤-1.25. By further setting the lower limit of the ratio of the effective focal length of the first lens to the total effective focal length of the optical lens, it is possible to effectively avoid the first lens having a focal length that is too long relative to the focal length of the entire optical lens, and avoid the situation where the first lens cannot fully bend the light due to the weak optical power of the first lens, and the light aperture of the first lens cannot reach a small aperture. In addition, by setting an upper limit on the ratio of the effective focal length of the first lens to the total effective focal length of the optical lens, the total effective focal length of the optical lens and the effective focal length of the first lens are prevented from being too small, which is conducive to miniaturization of the optical lens, and is conducive to achieving a small aperture of the first lens while taking into account the smooth transition of light, thereby improving the resolution of the optical lens. Further, the effective focal length F1 of the first lens and the total effective focal length F of the optical lens satisfy: -1.6376≤F1 / F≤-1.3456, and by further constraining the range of the conditional formula, it is conducive to miniaturization of the optical lens and improving the resolution of the optical lens.

[0100] In an exemplary embodiment, the vector height sag61 at the maximum clear aperture of the first side surface of the sixth lens corresponding to the maximum field angle of the optical lens, the vector height sag62 at the maximum clear aperture of the second side surface of the sixth lens corresponding to the maximum field angle of the optical lens, and the center thickness d61 of the sixth lens on the optical axis satisfy: |sag61-sag62| / d61≤0.4. Preferably, the vector height sag61 at the maximum clear aperture of the first side surface of the sixth lens corresponding to the maximum field angle of the optical lens, the vector height sag62 at the maximum clear aperture of the second side surface of the sixth lens corresponding to the maximum field angle of the optical lens, and the center thickness d61 of the sixth lens on the optical axis satisfy: |sag61-sag62| / d61≤0.2. Reasonable configuration of the relationship between the vector height at the maximum clear aperture of the first side surface of the sixth lens, the vector height at the maximum clear aperture of the second side surface of the sixth lens, and the center thickness of the sixth lens on the optical axis can ensure that the proportion of the sixth lens is more uniform, and at the same time ensure that the imaging effect of the sixth lens changes little in low temperature environment and high temperature environment, and can achieve low sensitivity of the optical lens. In addition, the surface of the sixth lens is relatively flat, which is conducive to more uniform radial force on the lens. Further, the vector height sag61 at the maximum light aperture of the first side of the sixth lens corresponding to the maximum field of view of the optical lens, the vector height sag62 at the maximum light aperture of the second side of the sixth lens corresponding to the maximum field of view of the optical lens, and the center thickness d61 of the sixth lens on the optical axis satisfy: 0.0026≤|sag61-sag62| / d61≤0.1266. By further constraining the range of the conditional formula, it is more conducive to achieving low sensitivity of the optical lens.

[0101] In an exemplary embodiment, the radius of curvature R61 of the first side surface of the sixth lens and the radius of curvature R62 of the second side surface of the sixth lens satisfy: 0<R61 / R62≤3. The ratio of the radius of curvature of the first side surface of the sixth lens to the radius of curvature of the second side surface of the sixth lens is reasonably controlled within a certain range, the sixth lens is convex-concave, and the first side surface of the sixth lens is configured with a smaller radius of curvature, which can effectively and quickly converge light and make the light smoothly transition to the second side surface of the sixth lens, maintain the position of the center field of view focus, and avoid the center field of view focus being far back. Preferably, the radius of curvature R61 of the first side surface of the sixth lens and the radius of curvature R62 of the second side surface of the sixth lens satisfy: 0<R61 / R62≤2, and further, when 0.0248≤R61 / R62≤1.1694. By controlling the ratio of the radius of curvature of the first side surface of the sixth lens to the radius of curvature of the second side surface of the sixth lens to be greater than a lower limit value, it is possible to effectively avoid a large difference between the effective radius of the second side surface and the effective radius of the first side surface, and to avoid the failure to diverge the light after rapid convergence; combined with controlling the small difference in the vector height at the maximum light clearance aperture of the first side surface and the second side surface of the sixth lens, the convergence point of the peripheral field of view can be brought close to the image plane, and the field curvature of the central field of view and the edge field of view can be reduced. The overall proportion of the sixth lens is uniform, and combined with the convex-concave shape of the sixth lens, it is possible to effectively reduce aberrations and correct field curvature, thereby improving the resolution capability of the optical lens.

[0102] In an exemplary embodiment, the radius of curvature R11 of the first side surface of the first lens and the radius of curvature R12 of the second side surface of the first lens satisfy: R11 / R12≥3. Preferably, the radius of curvature R11 of the first side surface of the first lens and the radius of curvature R12 of the second side surface of the first lens satisfy: 3≤R11 / R12≤700. Controlling the ratio of the radius of curvature of the first side surface of the first lens to the radius of curvature of the second side surface of the first lens can effectively enhance the light collection ability of the first lens for large-angle light, which is beneficial to improving the overall light throughput and illumination of the optical lens. The first side surface of the first lens can allow light with a large field of view to enter the optical lens, thereby realizing large-angle imaging. Controlling the range of R11 / R12 is beneficial to the second side surface to increase the degree of deflection of the edge light and diverge the trend of the edge light, which is beneficial to realizing a large field of view of the optical lens and reducing the aperture of the front end of the optical lens. At the same time, the first lens cooperates with the second lens whose first side surface is a concave surface, which can realize the smooth divergence of the light, which is beneficial to realizing a large field of view of the first lens, so that the light passing through the second lens can be smoothly transitioned, and the resolution ability of the optical lens is improved. Further preferably, 4.3273≤R11 / R12≤430.8011. By further limiting the range of the ratio of the radius of curvature of the first side surface of the first lens to the radius of curvature of the second side surface of the first lens, the resolution of the optical lens can be further improved.

[0103] In an exemplary embodiment, the distance TTL from the first side surface of the first lens to the imaging surface of the optical lens on the optical axis, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy: TTL / H / FOV×180°≤8. Preferably, the distance TTL from the first side surface of the first lens to the imaging surface of the optical lens on the optical axis, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy: 3.3≤TTL / H / FOV×180°≤4.5. Reasonable configuration of the relationship between the distance between the first side surface of the first lens and the second side surface of the sixth lens, the image height corresponding to the maximum field of view of the optical lens, and the maximum field of view of the optical lens is conducive to achieving a sufficiently large field of view for the optical lens and miniaturization of the optical lens. Furthermore, the distance TTL from the first side surface of the first lens to the imaging surface of the optical lens on the optical axis, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy: 3.6213≤TTL / H / FOV×180°≤4.368. By further constraining the range of the conditional formula, it is beneficial to realize that the optical lens has a sufficiently large field of view and realize the miniaturization of the optical lens.

[0104] In an exemplary embodiment, the center thickness d21 of the second lens on the optical axis, the center thickness d61 of the sixth lens on the optical axis, and the distance BFL from the center of the second side surface of the sixth lens to the imaging surface of the optical lens on the optical axis satisfy: (d21+d61) / BFL≤0.9. In the example, when the distance from the first side surface of the first lens to the imaging surface of the optical lens on the optical axis is limited, the second lens and the sixth lens have a small deflection of light, which is beneficial to reduce the sensitivity of the optical lens. Preferably, the center thickness d21 of the second lens on the optical axis, the center thickness d61 of the sixth lens on the optical axis, and the distance BFL from the center of the second side surface of the sixth lens to the imaging surface of the optical lens on the optical axis satisfy: 0.5≤(d21+d61) / BFL≤0.72; more specifically, when 0.5615≤(d21+d61) / BFL≤0.6878, by reducing the center thickness of the second lens and the sixth lens, it is possible to increase the back focal length of the optical lens to a certain extent.

[0105] In an exemplary embodiment, the center thickness d31 of the third lens on the optical axis, the effective focal length F3 of the third lens, the distance TTL on the optical axis from the first side surface of the first lens to the imaging surface of the optical lens, and the total effective focal length F of the optical lens satisfy: d31×F3 / (TTL×F)≤0.8. Preferably, the center thickness d31 of the third lens on the optical axis, the effective focal length F3 of the third lens, the distance TTL on the optical axis from the first side surface of the first lens to the imaging surface of the optical lens, and the total effective focal length F of the optical lens satisfy: 0.1≤d31×F3 / (TTL×F)≤0.5. While keeping the total effective focal length of the optical lens unchanged, reducing the effective focal length of the third lens can reduce the center thickness of the third lens to a certain extent, thereby realizing the miniaturization of the optical lens. Furthermore, the center thickness d31 of the third lens on the optical axis, the effective focal length F3 of the third lens, the distance TTL from the first side surface of the first lens to the imaging surface of the optical lens on the optical axis and the total effective focal length F of the optical lens satisfy: 0.1726≤d31×F3 / (TTL×F)≤0.4231. By setting the conditional expression, it is beneficial to achieve miniaturization of the optical lens.

[0106] In an exemplary embodiment, the effective focal length F4 of the fourth lens, the effective focal length F5 of the fifth lens and the total effective focal length F of the optical lens satisfy: (|F4|+|F5|) / F≤5. Preferably, the effective focal length F4 of the fourth lens, the effective focal length F5 of the fifth lens and the total effective focal length F of the optical lens satisfy: 1≤(|F4|+|F5|) / F≤3.5. Reasonable configuration of the relationship between the effective focal length of the fourth lens, the effective focal length of the fifth lens and the total effective focal length of the optical lens, and configuration of smaller values ​​of the effective focal length of the fourth lens and the effective focal length of the fifth lens are conducive to the rapid transition of light to the rear system, and to a certain extent reduce the total length of the optical lens, thereby realizing the miniaturization of the optical lens. Further, the effective focal length F4 of the fourth lens, the effective focal length F5 of the fifth lens and the total effective focal length F of the optical lens satisfy: 1.5753≤(|F4|+|F5|) / F≤3.0486. By setting the conditional expression, it is conducive to realizing the miniaturization of the optical lens.

[0107] In an exemplary embodiment, the center thickness d41 of the fourth lens on the optical axis, the center thickness d51 of the fifth lens on the optical axis, the effective focal length F4 of the fourth lens, the effective focal length F5 of the fifth lens, the distance TTL on the optical axis from the first side surface of the first lens to the imaging surface of the optical lens, and the total effective focal length F of the optical lens satisfy: (d41+d51)×(|F4|+|F5|) / (TTL×F)≤1.2. Preferably, the center thickness d41 of the fourth lens on the optical axis, the center thickness d51 of the fifth lens on the optical axis, the effective focal length F4 of the fourth lens, the effective focal length F5 of the fifth lens, the distance TTL on the optical axis from the first side surface of the first lens to the imaging surface of the optical lens, and the total effective focal length F of the optical lens satisfy: 0.15≤(d41+d51)×(|F4|+|F5|) / (TTL×F)≤0.9. The relationship between the center thickness of the fourth lens, the center thickness of the fifth lens, the effective focal length of the fourth lens, the effective focal length of the fifth lens, the total length of the optical lens and the total effective focal length of the optical lens is reasonably configured. When the total effective focal length of the optical lens remains unchanged, the combined focal length of the fourth lens and the fifth lens is configured to be a smaller value, which can reduce the center thickness of the fourth lens and the fifth lens, thereby realizing the miniaturization of the optical lens. Further, the center thickness d41 of the fourth lens on the optical axis, the center thickness d51 of the fifth lens on the optical axis, the effective focal length F4 of the fourth lens, the effective focal length F5 of the fifth lens, the distance TTL from the first side surface of the first lens to the imaging surface of the optical lens on the optical axis and the total effective focal length F of the optical lens satisfy: 0.2999≤(d41+d51)×(|F4|+|F5|) / (TTL×F)≤0.7406, and the miniaturization of the optical lens is realized by further constraining the range of the conditional formula.

[0108] In an exemplary embodiment, the vector height sag62 at the maximum clear aperture of the second side surface of the sixth lens corresponding to the maximum field angle of the optical lens and the maximum clear aperture D62 of the second side surface of the sixth lens corresponding to the maximum field angle of the optical lens satisfy the following conditions: arctan(|sag62 / D62|)≤10°. By configuring the second side surface of the sixth lens with a smaller exit surface angle, it is beneficial to achieve a smooth trend of the exiting light, thereby achieving a small principal light angle of the optical lens. Preferably, the vector height sag62 at the maximum clear aperture of the second side surface of the sixth lens corresponding to the maximum field angle of the optical lens and the maximum clear aperture D62 of the second side surface of the sixth lens corresponding to the maximum field angle of the optical lens satisfy the following conditions: arctan(|sag62 / D62|)≤7.5°. By configuring the second side surface of the sixth lens with a smaller exit surface angle, it is beneficial to achieve a smooth trend of the exiting light, thereby achieving a small principal light angle of the optical lens. Furthermore, the vector height sag62 at the maximum clear aperture of the second side surface of the sixth lens corresponding to the maximum field angle of the optical lens and the maximum clear aperture D62 of the second side surface of the sixth lens corresponding to the maximum field angle of the optical lens satisfy: 0.0474°≤arctan(|sag62 / D62|)≤4.6663°. By further constraining the range of the conditional formula, it is beneficial to achieve a smooth trend of the emitted light, and thus achieve a small principal light angle of the optical lens.

[0109] In an exemplary embodiment, the center thickness d11 of the first lens on the optical axis and the distance TTL from the first side of the first lens to the imaging surface of the optical lens on the optical axis satisfy: 0.03≤d11 / TTL≤0.5. Controlling the ratio of the center thickness of the first lens to the total length of the optical lens within a certain range can effectively optimize the mechanical properties of the optical lens in resisting external force impact, and at the same time, in combination with the rear lens, it is beneficial to improve the resolution of the optical lens. Preferably, the center thickness d11 of the first lens on the optical axis and the distance TTL from the first side of the first lens to the imaging surface of the optical lens on the optical axis satisfy: 0.055≤d11 / TTL≤0.08. The first lens is combined with a positive lens of a smaller focal length of the third lens, the fourth lens and the fifth lens cemented part to achieve miniaturization of the optical lens. Further, the center thickness d11 of the first lens on the optical axis and the distance TTL from the first side of the first lens to the imaging surface of the optical lens on the optical axis satisfy: 0.0612≤d11 / TTL≤0.073, which is more conducive to miniaturization of the optical lens.

[0110] In an exemplary embodiment, the total effective focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: F / ENPD≤2. Preferably, the total effective focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: 1.8≤F / ENPD≤1.9. Reasonable configuration of the relationship between the total effective focal length of the optical lens and the entrance pupil diameter of the optical lens is also beneficial to increasing the entrance pupil diameter of the optical lens, increasing the amount of light passing, and at the same time, it is beneficial to achieve a smaller aperture value and improve the relative illumination of the optical lens.

[0111] In an exemplary embodiment, the maximum clear aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy: D / H / FOV×180°≤6. Preferably, the maximum clear aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy: 1.3≤D / H / FOV×180°≤2.15. Reasonable configuration of the relationship between the maximum clear aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height corresponding to the maximum field of view of the optical lens, and the maximum field of view of the optical lens can enable the optical lens to have a smaller front port diameter, reduce the volume of the optical lens, and thereby achieve miniaturization of the optical lens. Furthermore, the maximum light clearance aperture D of the first side surface of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy: 1.4948≤D / H / FOV×180°≤2.0054. By further constraining the range of the conditional formula, it is beneficial to achieve miniaturization of the optical lens.

[0112] In an exemplary embodiment, the total effective focal length F of the optical lens and the image height H corresponding to the maximum field angle of the optical lens satisfy: 0.2≤F / H≤1.2. Preferably, the total effective focal length F of the optical lens and the image height H corresponding to the maximum field angle of the optical lens satisfy: 0.45≤F / H≤0.6, and further, when 0.4928≤F / H≤0.5693. Reasonable configuration of the relationship between the total effective focal length of the optical lens and the image height corresponding to the maximum field angle of the optical lens can make the total effective focal length of the optical lens closer to the image height corresponding to the maximum field angle of the optical lens, thereby providing a higher resolution capability of the optical lens.

[0113] In an exemplary embodiment, the maximum field of view FOV of the optical lens, the total effective 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≥50°. Preferably, the maximum field of view FOV of the optical lens, the total effective focal length F of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy: 55°≤(FOV×F) / H≤67°, and further, when 56.6002°≤(FOV×F) / H≤64.2683°. Reasonable configuration of the relationship between the maximum field of view of the optical lens, the total effective focal length of the optical lens and the image height corresponding to the maximum field of view of the optical lens is conducive to achieving a large angular resolution at the center of the optical lens while realizing that the optical lens has a telephoto characteristic and a large field of view.

[0114] In an exemplary embodiment, the radius of curvature R21 of the first side surface of the second lens and the radius of curvature R22 of the second side surface of the second lens satisfy: 0<R21 / R22≤2. Preferably, the radius of curvature R21 of the first side surface of the second lens and the radius of curvature R22 of the second side surface of the second lens satisfy: 0.72≤R21 / R22≤0.95. By setting the surface of the second lens to be concave and convex, and controlling the ratio of the radius of curvature of the first side surface of the second lens to the radius of curvature of the second side surface of the second lens within a certain range, it is beneficial to improve the aberration, so that the light enters the rear lens more smoothly, which is beneficial to improve the imaging quality of the optical lens. At the same time, it cooperates with the concave surface of the second side surface of the first lens to receive and diverge the light from the first lens, reduce the generation of different field of view distortion, and is beneficial to the second lens to emit light smoothly. And cooperate with the convex surface of the first side surface of the third lens, it is beneficial to reduce the distance between the second lens and the third lens on the optical axis, which is beneficial to reduce the total length of the optical lens and realize the miniaturization of the optical lens. In addition, the combination with the convex-concave surface type of the sixth lens is conducive to reducing different field aberrations, correcting field curvature, and improving the resolution of the optical lens. Furthermore, 0.7738≤R21 / R22≤0.9011. Further configuring the ratio of the curvature radius of the first side surface of the second lens to the curvature radius of the second side surface of the second lens can further improve the resolution of the optical lens.

[0115] In an exemplary embodiment, the vector height sag11 at the maximum clear aperture of the first side surface of the first lens corresponding to the maximum field of view of the optical lens and the radius of curvature R11 of the first side surface of the first lens satisfy: sag11 / R11≤0.06. By configuring the ratio of the vector height at the maximum clear aperture of the first side surface of the first lens corresponding to the maximum field of view of the optical lens to the radius of curvature of the first side surface of the first lens within a certain range, it is beneficial for the light to enter the rear lens smoothly and improve the resolution of the optical lens. By setting the second side surface of the first lens as a concave surface, as much light as possible can be collected to enter the rear lens, which is beneficial to achieve a large field of view. Preferably, the vector height sag11 at the maximum clear aperture of the first side surface of the first lens corresponding to the maximum field of view of the optical lens and the radius of curvature R11 of the first side surface of the first lens satisfy: sag11 / R11≤0.068. Further configuring the ratio of the vector height at the maximum clear aperture of the first side surface of the first lens corresponding to the maximum field of view of the optical lens to the radius of curvature of the first side surface of the first lens can further improve the resolution of the optical lens. Furthermore, the vector height sag11 at the maximum clear aperture of the first side surface of the first lens corresponding to the maximum field of view of the optical lens and the curvature radius R11 of the first side surface of the first lens satisfy: 0.0000019≤sag11 / R11≤0.041. By further constraining the range of sag11 / R11, it is beneficial to further improve the resolution capability of the optical lens.

[0116] In an exemplary embodiment, the center thickness d11 of the first lens on the optical axis and the center thickness d21 of the second lens on the optical axis satisfy: 0.5≤d21 / d11≤1.5. Preferably, the center thickness d11 of the first lens on the optical axis and the center thickness d21 of the second lens on the optical axis satisfy: 0.95≤d21 / d11≤1.4, and further, when 1.066≤d21 / d11≤1.3481. By configuring the center thickness of the first lens on the optical axis to be close to the center thickness of the second lens on the optical axis, it is beneficial to balance the optical path difference of the light on the first lens and the second lens, enhance the ability of the first lens and the second lens to regulate the light, and help reduce distortion and improve the resolution of the optical lens.

[0117] In an exemplary embodiment, the total effective focal length F of the optical lens and the radius of curvature R11 of the first side of the first lens satisfy: R11 / F1≤-2.1. By configuring the first side of the first lens with a larger radius of curvature, it is beneficial for light to enter the optical lens smoothly and improve the resolution ability. Reasonable configuration of the ratio of the total effective focal length of the optical lens to the radius of curvature of the first side of the first lens is conducive to realizing that the first lens has a smaller focal length, which is conducive to enhancing the first lens's ability to control light. The combination of setting the focal length of the first lens to be negative is conducive to diverging light from different fields of view and reducing the generation of distortion. At the same time, the second side of the first lens is concave, which is conducive to collecting more light into the lens and realizing a large field of view. Preferably, the total effective focal length F of the optical lens and the radius of curvature R11 of the first side of the first lens satisfy: -550≤R11 / F1≤-2.1, and further, when -333.5198≤R11 / F1≤-2.5593. Further configuring the ratio of the total effective focal length of the optical lens to the radius of curvature of the first side surface of the first lens can further improve the resolution of the optical lens.

[0118] In an exemplary embodiment, the positive effective focal length F+ of the fourth lens and the fifth lens and the negative effective focal length F- of the fourth lens and the fifth lens satisfy: 0.3≤|F+ / F-|≤1.5, and the fourth lens and the fifth lens are matched with one negative and one positive. Reasonable configuration of their focal length ratio range is conducive to balancing the aberration between the fourth lens and the fifth lens, effectively reducing the sensitivity of the optical lens group, further improving the imaging quality, and reducing the sensitivity of the rear lens. Preferably, the positive effective focal length F+ of the fourth lens and the fifth lens and the negative effective focal length F- of the fourth lens and the fifth lens satisfy: 0.3≤|F+ / F-|≤1.3, and further, when 0.4967≤|F+ / F-|≤1.0894. The sensitivity of the optical lens group is further reduced, the imaging quality is improved, and the sensitivity of the rear lens is reduced.

[0119] The optical lens according to the above-mentioned embodiment of the present application can use multiple lenses, such as the six lenses mentioned above. By reasonably allocating the optical parameters of each lens, the miniaturization, small aperture, back focal length, high resolution, low sensitivity, and small main light angle of the optical lens are achieved, and it can be well matched with, for example, vehicle-mounted chips without causing vignetting. The optical lens has good temperature performance, the imaging effect changes little under high and low temperatures, and the image quality is stable. Therefore, the optical lens according to the above-mentioned embodiment of the present application can better meet the requirements of, for example, vehicle-mounted applications.

[0120] Those skilled in the art should understand that the total optical length TTL of the optical lens used above refers to the distance from the first side surface of the first lens to the imaging surface of the optical lens on the optical axis; the optical back focus BFL of the optical lens refers to the axial distance from the second side surface of the sixth lens to the imaging surface or the image source surface; and the maximum field of view FOV of the optical lens is associated with the image height H, which refers to the field of view corresponding to the image height H.

[0121] In an exemplary embodiment, d11 is the distance between the first side surface and the second side surface of the first lens on the optical axis, d21 is the distance between the first side surface and the second side surface of the second lens on the optical axis, d31 is the distance between the first side surface and the second side surface of the third lens on the optical axis, d41 is the distance between the first side surface and the second side surface of the fourth lens on the optical axis, d51 is the distance between the first side surface and the second side surface of the fifth lens on the optical axis, and d61 is the distance between the first side surface and the second side surface of the sixth lens on the optical axis.

[0122] In an exemplary embodiment, the optical lens may be used as, for example, an imaging lens, in which case the first side of the optical lens may be an object side and the second side may be an image side. Light from the object side may be imaged on the image side. The second side of the optical lens is provided with an imaging surface of the optical lens.

[0123] In an exemplary embodiment, the optical lens may 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 may be an image source side, and the first side may be an imaging side. Light from the image source side may be imaged on the imaging side. The second side of the optical lens is provided with an image source surface of the optical lens. However, it should be understood by those skilled in the art that, without departing from the technical solution claimed in the present application, the number of lenses constituting the optical lens may be changed to obtain the various results and advantages described in this specification. For example, although six lenses are described as an example in the embodiment, the optical lens is not limited to including six lenses. If necessary, the optical lens may also include other numbers of lenses.

[0124] Specific embodiments of the optical lens applicable to the above-mentioned embodiments are further described below with reference to the accompanying drawings.

[0125] It should be noted that the optical lenses provided in Examples 1 to 12 of the present application are all capable of achieving good imaging quality with a line of sight, and their modulation transfer function (MTF) curves are relatively close, so only the modulation transfer function (MTF) curve of Example 1 is exemplarily shown in the present application, and the modulation transfer function (MTF) curves of other embodiments are no longer shown one by one, and those skilled in the art should be able to know them based on the contents disclosed in the present application.

[0126] MTF stands for modulation transfer function, which describes the ability of an optical lens to "restore" the object side on the image side. The horizontal axis of the modulation transfer function (MTF) curve is the spatial frequency, and the unit of the spatial frequency is line pairs per millimeter (lp / mm). The vertical axis Modulus of the OTF represents the OTF coefficient. The MTF curve of the optical lens provided in this application has an MTF value of more than 0.4 at 65 lp / mm, which can meet the required image quality requirements. Example 1

[0127] The following reference Figure 1 The optical lens according to Example 1 of the present application is described.

[0128] like Figure 1 As shown, the optical lens includes, from the first side to the second side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6. The aperture STO can be disposed between the third lens L3 and the fourth lens L4. The fourth lens L4 and the fifth lens L5 are cemented to form a cemented lens. The second lens L2 and the sixth lens L6 are aspherical lenses.

[0129] The first lens L1 has negative refractive power, and its first side surface S1 is a convex surface, and its second side surface S2 is a concave surface.

[0130] The second lens L2 has negative refractive power, and its first side surface S3 is a concave surface, and its second side surface S4 is a convex surface.

[0131] The third lens L3 has positive refractive power, and its first side surface S5 is a convex surface, and its second side surface S6 is a convex surface.

[0132] The fourth lens L4 has negative refractive power, and its first side surface S8 is convex, and its second side surface S9 is concave.

[0133] The fifth lens L5 has positive refractive power, and its first side surface S9 is a convex surface, and its second side surface S10 is a convex surface.

[0134] The sixth lens L6 has positive refractive power, and its first side surface S11 is convex, and its second side surface S12 is concave.

[0135] An image plane IMA is disposed on the second side of the optical lens, and a filter is disposed between the sixth lens L6 and the image plane IMA, and the filter has a first side surface S13 and a second side surface S14. When IMA is an imaging surface, light from an object sequentially passes through each surface S1 to S14 and is finally imaged on IMA. When IMA is an image source surface, light from IMA sequentially passes through each surface S14 to S1 and is finally projected on the object.

[0136] Table 1 shows the basic parameters of the optical lens of Example 1, wherein the units of the radius of curvature and thickness / distance are all millimeters (mm).

[0137] Table 1

[0138] Face number Radius of curvature Thickness / distance Refractive Index Abbe number infinity infinity S1 16.8271 1.1826 1.80 46.57 S2 3.1553 2.6231 S3 -3.2507 1.2876 1.64 23.53 S4 -4.1478 0.1574 S5 8.0304 2.2181 2.00 25.44 S6 -12.1821 0.5483 STO infinity 0.1659 S8 88.1103 0.5970 1.95 17.94 S9 3.5863 2.8920 1.73 54.67 S10 -8.3546 0.1946 S11 9.5131 1.2867 1.54 56.11 S12 29.7561 3.3028 S13 infinity 0.8000 1.52 64.21 S14 infinity 0.1500 IMA / /

[0139] In Example 1, the first side surface S3 and the second side surface S4 of the second lens L2 and the first side surface S11 and the second side surface S12 of the sixth lens L6 are all aspherical surfaces, and the surface shape of each aspherical lens can be defined by but not limited to the following aspherical surface formula:

[0140] (1)

[0141] in, is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c=1 / R (i.e., the paraxial curvature c is the reciprocal of the curvature radius R in Table 1 above); k is the cone coefficient; Ai is the correction coefficient of the i-th order of the aspheric surface. Table 2 shows the cone coefficient k and the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspheric surface S3, S4, S11, S12 in Example 1.

[0142] Table 2

[0143] Face number k A4 A6 A8 A10 A12 A14 A16 S3 -1.3312 -6.2717E-03 1.7806E-04 3.6705E-05 3.7031E-07 3.0660E-06 -9.4284E-07 7.5029E-08 S4 -0.5213 1.8358E-04 -4.4015E-05 8.5543E-05 1.1049E-06 -3.9982E-06 7.5926E-07 -4.6333E-08 S11 1.5830 3.6388E-04 1.3150E-04 -1.3965E-04 3.0731E-05 -4.5725E-06 3.2819E-07 -8.6248E-09 S12 12.4870 4.0620E-03 -4.7500E-04 1.3562E-04 -3.9188E-05 4.7680E-06 -2.6897E-07 5.2352E-09

[0144] Figure 2 The modulation transfer function curve of the optical lens of Example 1 is shown, which indicates that the MTF peak of the optical lens at a spatial frequency of 65 lp / mm (65 lines / mm) exceeds 0.87. Figure 3 The distortion curve of the optical lens of Example 1 is shown. Therefore, the optical lens provided in Example 1 can achieve good imaging quality. Example 2

[0145] The following reference Figure 4 Describe the optical lens according to Example 2 of the present application.

[0146] like Figure 4 As shown, the optical lens includes, from the first side to the second side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6. The aperture STO can be disposed between the third lens L3 and the fourth lens L4. The fourth lens L4 and the fifth lens L5 are cemented to form a cemented lens. The first side surface S11 and the second side surface S12 of the sixth lens L6 each have at least one inflection point. The second lens L2 and the sixth lens L6 are aspherical lenses.

[0147] The first lens L1 has negative refractive power, and its first side surface S1 is a convex surface, and its second side surface S2 is a concave surface.

[0148] The second lens L2 has negative refractive power, and its first side surface S3 is a concave surface, and its second side surface S4 is a convex surface.

[0149] The third lens L3 has positive refractive power, and its first side surface S5 is a convex surface, and its second side surface S6 is a convex surface.

[0150] The fourth lens L4 has negative refractive power, and its first side surface S8 is convex, and its second side surface S9 is concave.

[0151] The fifth lens L5 has positive refractive power, and its first side surface S9 is a convex surface, and its second side surface S10 is a convex surface.

[0152] The sixth lens L6 has positive refractive power, and its first side surface S11 is convex, and its second side surface S12 is concave.

[0153] An image plane IMA is disposed on the second side of the optical lens, and a filter is disposed between the sixth lens L6 and the image plane IMA, and the filter has a first side surface S13 and a second side surface S14. When IMA is an imaging surface, light from an object sequentially passes through each surface S1 to S14 and is finally imaged on IMA. When IMA is an image source surface, light from IMA sequentially passes through each surface S14 to S1 and is finally projected on the object.

[0154] Table 3 shows the basic parameters of the optical lens of Example 2, wherein the units of the radius of curvature and thickness / distance are all millimeters (mm).

[0155] Table 3

[0156] Face number Radius of curvature Thickness / distance Refractive Index Abbe number infinity infinity S1 28.6073 1.1622 1.80 46.57 S2 3.4028 1.8059 S3 -3.1323 1.2814 1.64 23.53 S4 -3.9813 0.1435 S5 7.1374 2.2416 2.00 25.44 S6 -10.2600 0.2603 STO infinity 0.1848 S8 216.2795 0.5957 1.95 17.94 S9 3.3785 2.9750 1.73 54.67 S10 -7.3122 0.1969 S11 14.6867 1.2834 1.54 56.11 S12 42.8703 2.9559 S13 infinity 0.8000 1.52 64.21 S14 infinity 0.1500 IMA / /

[0157] In Example 2, the first side surface S3 and the second side surface S4 of the second lens L2 and the first side surface S11 and the second side surface S12 of the sixth lens L6 are all aspherical surfaces. Table 4 shows the cone coefficient k and the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical surfaces S3, S4, S11 and S12 that can be used in Example 2.

[0158] Table 4

[0159] Face number k A4 A6 A8 A10 A12 A14 A16 S3 -0.9015 -7.5054E-03 1.5418E-04 1.1159E-04 1.8784E-05 9.8777E-07 -1.9232E-06 2.2176E-07 S4 -0.4143 -2.3858E-04 9.6282E-05 1.1808E-04 8.2631E-06 -4.8705E-06 3.6889E-07 1.4764E-08 S11 -5.5518 2.3877E-04 -2.3155E-04 -1.3612E-04 3.1341E-05 -4.8797E-06 2.6231E-07 -3.0558E-09 S12 -196.6600 4.0535E-03 -7.4888E-04 1.2319E-04 -3.8666E-05 4.8781E-06 -2.6369E-07 4.0090E-09

[0160] The MTF peak value of the optical lens of Example 2 at a spatial frequency of 65 lp / mm (65 lines / mm) exceeds 0.87. Figure 5 The distortion curve of the optical lens of Example 2 is shown. Therefore, the optical lens provided in Example 2 can achieve good imaging quality. Example 3

[0161] The following reference Figure 6 Describe the optical lens according to Example 3 of the present application.

[0162] like Figure 6 As shown, the optical lens includes, from the first side to the second side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6. The aperture STO can be disposed between the third lens L3 and the fourth lens L4. The fourth lens L4 and the fifth lens L5 are cemented to form a cemented lens. The first side surface S11 and the second side surface S12 of the sixth lens L6 each have at least one inflection point. The second lens L2 and the sixth lens L6 are aspherical lenses.

[0163] The first lens L1 has negative refractive power, and its first side surface S1 is a convex surface, and its second side surface S2 is a concave surface.

[0164] The second lens L2 has negative refractive power, and its first side surface S3 is a concave surface, and its second side surface S4 is a convex surface.

[0165] The third lens L3 has positive refractive power, and its first side surface S5 is a convex surface, and its second side surface S6 is a convex surface.

[0166] The fourth lens L4 has negative refractive power, and its first side surface S8 is concave, and its second side surface S9 is concave.

[0167] The fifth lens L5 has positive refractive power, and its first side surface S9 is a convex surface, and its second side surface S10 is a convex surface.

[0168] The sixth lens L6 has positive refractive power, and its first side surface S11 is convex, and its second side surface S12 is concave.

[0169] An image plane IMA is provided on the second side of the optical lens, and a filter and a protective glass are provided between the sixth lens L6 and the image plane IMA. The filter has a first side surface S13 and a second side surface S14. The protective glass has a first side surface S15 and a second side surface S16. When IMA is an imaging surface, light from an object sequentially passes through each surface S1 to S16 and is finally imaged on IMA. When IMA is an image source surface, light from IMA sequentially passes through each surface S16 to S1 and is finally projected on the object.

[0170] Table 5 shows the basic parameter table of the optical lens of Example 3, wherein the units of the radius of curvature and thickness / distance are all millimeters (mm).

[0171] Table 5

[0172] Face number Radius of curvature Thickness / distance Refractive Index Abbe number infinity infinity S1 59.8553 1.1828 1.77 49.61 S2 3.8664 2.2192 S3 -3.6429 1.3575 1.51 56.29 S4 -4.6601 0.1494 S5 6.1763 2.3589 1.90 31.32 S6 -14.1627 0.1820 STO infinity 0.5703 S8 -17.2366 0.6774 1.85 23.79 S9 2.9813 2.6420 1.77 49.61 S10 -6.5121 0.1955 S11 18.1773 1.2731 1.51 56.29 S12 114.0794 1.0000 S13 infinity 0.5500 1.52 64.21 S14 infinity 2.5266 S15 infinity 0.4000 1.52 64.21 S16 infinity 0.1500 IMA / /

[0173] In Example 3, the first side surface S3 and the second side surface S4 of the second lens L2 and the first side surface S11 and the second side surface S12 of the sixth lens L6 are all aspherical surfaces. Table 6 shows the cone coefficient k and the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical surfaces S3, S4, S11 and S12 that can be used in Example 3.

[0174] Table 6

[0175] Face number k A4 A6 A8 A10 A12 A14 A16 S3 0.4713 3.4923E-04 5.1897E-04 9.0795E-05 -1.7393E-05 1.7794E-06 4.0057E-08 -8.2167E-09 S4 1.5953 2.5536E-03 9.1365E-04 -9.8385E-05 2.1510E-05 -1.7316E-06 5.0214E-08 7.6338E-09 S11 -113.8100 -3.0702E-03 -1.0819E-04 -3.4091E-04 9.4895E-05 -9.4226E-06 -4.6591E-07 8.3349E-08 S12 -199.5700 -4.9253E-03 1.3447E-03 -7.4044E-04 1.6559E-04 -1.8140E-05 7.0621E-07 6.4840E-09

[0176] The MTF peak value of the optical lens of Example 3 at a spatial frequency of 65 lp / mm (65 lines / mm) exceeds 0.82. Figure 7 The distortion curve of the optical lens of Example 3 is shown. Therefore, the optical lens provided in Example 3 can achieve good imaging quality. Example 4

[0177] The following reference Figure 8 Describe the optical lens according to Example 4 of the present application.

[0178] like Figure 8 As shown, the optical lens includes, from the first side to the second side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6. The aperture STO can be disposed between the third lens L3 and the fourth lens L4. The fourth lens L4 and the fifth lens L5 are cemented to form a cemented lens. The second lens L2 and the sixth lens L6 are aspherical lenses.

[0179] The first lens L1 has negative refractive power, and its first side surface S1 is a convex surface, and its second side surface S2 is a concave surface.

[0180] The second lens L2 has negative refractive power, and its first side surface S3 is a concave surface, and its second side surface S4 is a convex surface.

[0181] The third lens L3 has positive refractive power, and its first side surface S5 is a convex surface, and its second side surface S6 is a convex surface.

[0182] The fourth lens L4 has negative refractive power, and its first side surface S8 is concave, and its second side surface S9 is concave.

[0183] The fifth lens L5 has positive refractive power, and its first side surface S9 is a convex surface, and its second side surface S10 is a convex surface.

[0184] The sixth lens L6 has positive refractive power, and its first side surface S11 is convex, and its second side surface S12 is concave.

[0185] An image plane IMA is provided on the second side of the optical lens, and a filter and a protective glass are provided between the sixth lens L6 and the image plane IMA. The filter has a first side surface S13 and a second side surface S14. The protective glass has a first side surface S15 and a second side surface S16. When IMA is an imaging surface, light from an object sequentially passes through each surface S1 to S16 and is finally imaged on IMA. When IMA is an image source surface, light from IMA sequentially passes through each surface S16 to S1 and is finally projected on the object.

[0186] Table 7 shows the basic parameter table of the optical lens of Example 4, wherein the units of the radius of curvature and thickness / distance are all millimeters (mm).

[0187] Table 7

[0188] Face number Radius of curvature Thickness / distance Refractive Index Abbe number infinity infinity S1 141.6286 1.1816 1.77 49.61 S2 4.3476 2.1958 S3 -3.3827 1.5929 1.51 56.29 S4 -4.2486 0.1492 S5 6.9847 2.3190 1.90 31.32 S6 -10.9966 0.3497 STO infinity 0.3148 S8 -14.8693 0.5937 1.85 23.79 S9 3.1717 2.7533 1.77 49.61 S10 -8.0188 0.1860 S11 12.2336 1.2739 1.51 56.29 S12 71.4246 1.0000 S13 infinity 0.5500 1.52 64.21 S14 infinity 2.4414 S15 infinity 0.4000 1.52 64.21 S16 infinity 0.1500 IMA / /

[0189] In Example 4, the first side surface S3 and the second side surface S4 of the second lens L2 and the first side surface S11 and the second side surface S12 of the sixth lens L6 are all aspherical surfaces. Table 8 shows the cone coefficient k and the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical surfaces S3, S4, S11 and S12 that can be used in Example 4.

[0190] Table 8

[0191] Face number k A4 A6 A8 A10 A12 A14 A16 S3 0.3030 -1.2575E-04 5.0842E-04 9.5825E-05 -1.3599E-05 2.1589E-06 -4.9166E-08 -9.7045E-09 S4 1.3085 3.1800E-03 7.9747E-04 -7.3279E-05 2.5282E-05 -2.0112E-06 -5.6751E-08 2.3242E-08 S11 6.5294 4.1434E-04 4.3486E-04 -3.6201E-04 9.2015E-05 -8.7421E-06 -2.8220E-07 6.4079E-08 S12 119.3000 2.0551E-03 1.5562E-03 -7.3215E-04 1.6299E-04 -1.8256E-05 7.2793E-07 7.4477E-09

[0192] The MTF peak value of the optical lens of Example 4 at a spatial frequency of 65 lp / mm (65 lines / mm) exceeds 0.79. Fig. 9 The distortion curve of the optical lens of Example 4 is shown. Therefore, the optical lens provided in Example 4 can achieve good imaging quality. Example 5

[0193] The following reference Fig.10 Describe the optical lens according to Example 5 of the present application.

[0194] like Fig.10 As shown, the optical lens includes, from the first side to the second side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6. The aperture STO can be disposed between the third lens L3 and the fourth lens L4. The fourth lens L4 and the fifth lens L5 are cemented to form a cemented lens. The second lens L2 and the sixth lens L6 are aspherical lenses.

[0195] The first lens L1 has negative refractive power, and its first side surface S1 is a convex surface, and its second side surface S2 is a concave surface.

[0196] The second lens L2 has negative refractive power, and its first side surface S3 is a concave surface, and its second side surface S4 is a convex surface.

[0197] The third lens L3 has positive refractive power, and its first side surface S5 is a convex surface, and its second side surface S6 is a concave surface.

[0198] The fourth lens L4 has positive refractive power, and its first side surface S8 is a convex surface, and its second side surface S9 is a convex surface.

[0199] The fifth lens L5 has negative refractive power, and its first side surface S9 is concave, and its second side surface S10 is convex.

[0200] The sixth lens L6 has positive refractive power, and its first side surface S11 is convex, and its second side surface S12 is concave.

[0201] An image plane IMA is disposed on the second side of the optical lens, and a filter is disposed between the sixth lens L6 and the image plane IMA, and the filter has a first side surface S13 and a second side surface S14. When IMA is an imaging surface, light from an object sequentially passes through each surface S1 to S14 and is finally imaged on IMA. When IMA is an image source surface, light from IMA sequentially passes through each surface S14 to S1 and is finally projected on the object.

[0202] Table 9 shows the basic parameter table of the optical lens of Example 5, wherein the units of the radius of curvature and thickness / distance are all millimeters (mm).

[0203] Table 9

[0204] Face number Radius of curvature Thickness / distance Refractive Index Abbe number infinity infinity S1 13.2251 1.0956 1.80 46.57 S2 3.0562 2.5381 S3 -2.8961 1.2878 1.64 23.53 S4 -3.7429 0.1482 S5 6.3180 1.5636 2.00 25.44 S6 14.3043 0.2600 STO infinity 0.4486 S8 7.1507 3.6153 1.73 54.67 S9 -3.1085 0.7150 1.95 17.94 S10 -7.4021 0.1942 S11 10.3550 1.2885 1.54 56.11 S12 51.7139 3.0654 S13 infinity 0.8000 1.52 64.21 S14 infinity 0.1500 IMA / /

[0205] In Example 5, the first side surface S3 and the second side surface S4 of the second lens L2 and the first side surface S11 and the second side surface S12 of the sixth lens L6 are all aspherical surfaces. Table 10 shows the cone coefficient k and the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical surfaces S3, S4, S11 and S12 that can be used in Example 5.

[0206] Table 10

[0207] Face number k A4 A6 A8 A10 A12 A14 A16 S3 -1.7779 -4.6343E-03 1.5784E-04 -5.0229E-05 1.0533E-05 7.0417E-06 -2.0545E-06 1.4455E-07 S4 -1.1404 2.3156E-04 -2.6301E-04 8.4632E-05 -6.6949E-06 -4.2920E-06 1.7917E-06 -1.8713E-07 S11 8.7890 -4.0524E-04 4.5554E-05 -1.4713E-04 3.5348E-05 -5.1008E-06 2.4450E-07 2.0676E-09 S12 195.6800 5.8633E-03 -3.8045E-04 1.5077E-04 -4.2751E-05 5.2799E-06 -3.6684E-07 1.2509E-08

[0208] The MTF peak value of the optical lens of Example 5 at a spatial frequency of 65 lp / mm (65 lines / mm) exceeds 0.82. Fig.11 The distortion curve of the optical lens of Example 5 is shown. Therefore, the optical lens of Example 5 can achieve good imaging quality. Example 6

[0209] The following reference Fig.12Describe the optical lens according to Example 6 of the present application.

[0210] like Fig.12 As shown, the optical lens includes, from the first side to the second side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6. The aperture STO can be disposed between the third lens L3 and the fourth lens L4. The fourth lens L4 and the fifth lens L5 are cemented to form a cemented lens. The second lens L2 and the sixth lens L6 are aspherical lenses.

[0211] The first lens L1 has negative refractive power, and its first side surface S1 is a convex surface, and its second side surface S2 is a concave surface.

[0212] The second lens L2 has negative refractive power, and its first side surface S3 is a concave surface, and its second side surface S4 is a convex surface.

[0213] The third lens L3 has positive refractive power, and its first side surface S5 is a convex surface, and its second side surface S6 is a concave surface.

[0214] The fourth lens L4 has positive refractive power, and its first side surface S8 is a convex surface, and its second side surface S9 is a convex surface.

[0215] The fifth lens L5 has negative refractive power, and its first side surface S9 is concave, and its second side surface S10 is convex.

[0216] The sixth lens L6 has positive refractive power, and its first side surface S11 is convex, and its second side surface S12 is concave.

[0217] An image plane IMA is disposed on the second side of the optical lens, and a filter is disposed between the sixth lens L6 and the image plane IMA, and the filter has a first side surface S13 and a second side surface S14. When IMA is an imaging surface, light from an object sequentially passes through each surface S1 to S14 and is finally imaged on IMA. When IMA is an image source surface, light from IMA sequentially passes through each surface S14 to S1 and is finally projected on the object.

[0218] Table 11 shows the basic parameter table of the optical lens of Example 6, wherein the units of the radius of curvature and thickness / distance are all millimeters (mm).

[0219] Table 11

[0220] Face number Radius of curvature Thickness / distance Refractive Index Abbe number infinity infinity S1 127.0081 1.1946 1.80 46.57 S2 4.2883 2.3373 S3 -2.7543 1.2734 1.64 23.53 S4 -3.5241 0.1507 S5 6.0933 1.5068 2.00 25.44 S6 9.7174 0.4796 STO infinity 0.5647 S8 5.6792 3.2659 1.73 54.67 S9 -3.8171 0.5844 1.95 17.94 S10 -10.2921 0.1810 S11 11.9748 1.2628 1.54 56.11 S12 482.9674 3.4202 S13 infinity 0.8000 1.52 64.21 S14 infinity 0.1500 IMA / /

[0221] In Example 6, the first side surface S3 and the second side surface S4 of the second lens L2 and the first side surface S11 and the second side surface S12 of the sixth lens L6 are all aspherical surfaces. Table 12 shows the cone coefficient k and the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical surfaces S3, S4, S11 and S12 that can be used in Example 6.

[0222] Table 12

[0223] Face number k A4 A6 A8 A10 A12 A14 A16 S3 -1.4730 -4.5129E-03 4.4263E-04 -6.9747E-05 1.9525E-05 7.9445E-06 -2.7301E-06 2.0916E-07 S4 -1.0742 2.4548E-04 -2.2218E-04 1.2319E-04 2.2535E-06 -6.5641E-06 1.2785E-06 -8.2671E-08 S11 8.9303 2.6617E-03 -1.6570E-04 -9.6879E-05 2.9802E-05 -5.6885E-06 3.3644E-07 4.4686E-09 S12 175.8800 8.9266E-03 -2.8509E-04 1.6347E-04 -4.9534E-05 5.6940E-06 -4.0152E-07 1.9514E-08

[0224] The MTF peak value of the optical lens of Example 6 at a spatial frequency of 65 lp / mm (65 lines / mm) exceeds 0.82. Fig.13 The distortion curve of the optical lens of Example 6 is shown. Therefore, the optical lens provided in Example 6 can achieve good imaging quality. Example 7

[0225] The following reference Fig.14 Describe the optical lens according to Example 7 of the present application.

[0226] like Fig.14 As shown, the optical lens includes, from the first side to the second side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6. The aperture STO can be disposed between the third lens L3 and the fourth lens L4. The fourth lens L4 and the fifth lens L5 are cemented to form a cemented lens. The second lens L2 and the sixth lens L6 are aspherical lenses.

[0227] The first lens L1 has negative refractive power, and its first side surface S1 is a convex surface, and its second side surface S2 is a concave surface.

[0228] The second lens L2 has negative refractive power, and its first side surface S3 is a concave surface, and its second side surface S4 is a convex surface.

[0229] The third lens L3 has positive refractive power, and its first side surface S5 is a convex surface, and its second side surface S6 is a convex surface.

[0230] The fourth lens L4 has negative refractive power, and its first side surface S8 is concave, and its second side surface S9 is concave.

[0231] The fifth lens L5 has positive refractive power, and its first side surface S9 is a convex surface, and its second side surface S10 is a convex surface.

[0232] The sixth lens L6 has negative refractive power, and its first side surface S11 is convex, and its second side surface S12 is concave.

[0233] An image plane IMA is provided on the second side of the optical lens, and a filter and a protective glass are provided between the sixth lens L6 and the image plane IMA. The filter has a first side surface S13 and a second side surface S14. The protective glass has a first side surface S15 and a second side surface S16. When IMA is an imaging surface, light from an object sequentially passes through each surface S1 to S16 and is finally imaged on IMA. When IMA is an image source surface, light from IMA sequentially passes through each surface S16 to S1 and is finally projected on the object.

[0234] Table 13 shows the basic parameter table of the optical lens of Example 7, wherein the units of the radius of curvature and thickness / distance are all millimeters (mm).

[0235] Table 13

[0236] Face number Radius of curvature Thickness / distance Refractive Index Abbe number infinity infinity S1 1910.3013 1.1822 1.77 49.61 S2 4.4343 2.2288 S3 -3.8442 1.3505 1.51 56.29 S4 -4.6943 0.1492 S5 8.8045 2.2740 1.90 31.32 S6 -10.4143 0.7212 STO infinity 0.1725 S8 -41.0629 0.5959 1.85 23.79 S9 3.1199 2.9870 1.77 49.61 S10 -6.2451 0.1954 S11 9.1989 1.2896 1.51 56.29 S12 7.8664 1.0000 S13 infinity 0.5500 1.52 64.21 S14 infinity 2.2072 S15 infinity 0.4000 1.52 64.21 S16 infinity 0.1500 IMA / /

[0237] In Example 7, the first side surface S3 and the second side surface S4 of the second lens L2 and the first side surface S11 and the second side surface S12 of the sixth lens L6 are all aspherical surfaces. Table 14 shows the cone coefficient k and the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical surfaces S3, S4, S11 and S12 that can be used in Example 7.

[0238] Table 14

[0239] Face number k A4 A6 A8 A10 A12 A14 A16 S3 0.3103 -1.8538E-03 3.6587E-04 9.4422E-05 -1.2271E-05 1.7606E-06 -1.8891E-07 7.4474E-09 S4 1.6668 2.6709E-03 7.0346E-04 -5.5687E-05 2.5107E-05 -2.3933E-06 -6.3361E-08 2.2652E-08 S11 -11.1420 -4.1884E-04 2.4027E-04 -3.4621E-04 9.5692E-05 -9.1061E-06 -3.2721E-07 7.1552E-08 S12 -6.2054 1.8599E-04 1.2217E-03 -6.6718E-04 1.5633E-04 -1.8290E-05 8.4955E-07 -1.3047E-09

[0240] The MTF peak of the optical lens of Example 7 exceeds 0.80 at a spatial frequency of 65 lp / mm (65 lines / mm). Fig.15 The distortion curve of the optical lens of Example 7 is shown. Therefore, the optical lens provided in Example 7 can achieve good imaging quality. Example 8

[0241] The following reference Fig.16 Describe the optical lens according to Example 8 of the present application.

[0242] like Fig.16 As shown, the optical lens includes, from the first side to the second side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6. The aperture STO can be disposed between the third lens L3 and the fourth lens L4. The fourth lens L4 and the fifth lens L5 are cemented to form a cemented lens. The second lens L2 and the sixth lens L6 are aspherical lenses.

[0243] The first lens L1 has negative refractive power, and its first side surface S1 is a convex surface, and its second side surface S2 is a concave surface.

[0244] The second lens L2 has negative refractive power, and its first side surface S3 is a concave surface, and its second side surface S4 is a convex surface.

[0245] The third lens L3 has positive refractive power, and its first side surface S5 is a convex surface, and its second side surface S6 is a convex surface.

[0246] The fourth lens L4 has negative refractive power, and its first side surface S8 is concave, and its second side surface S9 is concave.

[0247] The fifth lens L5 has positive refractive power, and its first side surface S9 is a convex surface, and its second side surface S10 is a convex surface.

[0248] The sixth lens L6 has negative refractive power, and its first side surface S11 is convex, and its second side surface S12 is concave.

[0249] An image plane IMA is provided on the second side of the optical lens, and a filter and a protective glass are provided between the sixth lens L6 and the image plane IMA. The filter has a first side surface S13 and a second side surface S14. The protective glass has a first side surface S15 and a second side surface S16. When IMA is an imaging surface, light from an object sequentially passes through each surface S1 to S16 and is finally imaged on IMA. When IMA is an image source surface, light from IMA sequentially passes through each surface S16 to S1 and is finally projected on the object.

[0250] Table 15 shows the basic parameter table of the optical lens of Example 8, wherein the units of the radius of curvature and thickness / distance are all millimeters (mm).

[0251] Table 15

[0252] Face number Radius of curvature Thickness / distance Refractive Index Abbe number infinity infinity S1 20.0000 1.1699 1.77 49.61 S2 3.6070 2.6108 S3 -3.6111 1.2960 1.51 56.29 S4 -4.6194 0.1491 S5 9.1949 2.2502 1.90 31.32 S6 -9.6422 0.6903 STO infinity 0.1533 S8 -38.0943 0.5931 1.85 23.79 S9 3.0877 2.9751 1.77 49.61 S10 -6.1065 0.1912 S11 8.0191 1.2827 1.51 56.29 S12 7.0584 1.0000 S13 infinity 0.5500 1.52 64.21 S14 infinity 2.1154 S15 infinity 0.4000 1.52 64.21 S16 infinity 0.15 IMA / /

[0253] In Example 8, the first side surface S3 and the second side surface S4 of the second lens L2 and the first side surface S11 and the second side surface S12 of the sixth lens L6 are all aspherical surfaces. Table 16 shows the cone coefficient k and the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical surfaces S3, S4, S11 and S12 that can be used in Example 8.

[0254] Table 16

[0255] Face number k A4 A6 A8 A10 A12 A14 A16 S3 0.3077 -1.1835E-03 4.5761E-04 1.0445E-04 -1.5975E-05 1.4545E-06 -1.5453E-08 -3.2050E-09 S4 1.3987 2.6093E-03 7.3533E-04 -5.7916E-05 2.2243E-05 -2.2993E-06 -1.3728E-08 1.6712E-08 S11 -12.0690 2.3136E-04 2.8452E-04 -3.7083E-04 9.4030E-05 -8.7580E-06 -1.9993E-07 5.4420E-08 S12 -2.4335 -1.7187E-04 1.1258E-03 -6.3068E-04 1.4785E-04 -1.7996E-05 9.9129E-07 -1.4774E-08

[0256] The MTF peak of the optical lens of Example 8 exceeds 0.80 at a spatial frequency of 65 lp / mm (65 lines / mm). Fig.17 The distortion curve of the optical lens of Example 8 is shown. Therefore, the optical lens of Example 8 can achieve good imaging quality. Example 9

[0257] The following reference Fig.18 Describe the optical lens according to Example 9 of the present application.

[0258] like Fig.18 As shown, the optical lens includes, from the first side to the second side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6. The aperture STO can be disposed between the third lens L3 and the fourth lens L4. The fourth lens L4 and the fifth lens L5 are cemented to form a cemented lens. The first side surface S11 and the second side surface S12 of the sixth lens L6 each have at least one inflection point. The second lens L2 and the sixth lens L6 are aspherical lenses.

[0259] The first lens L1 has negative refractive power, and its first side surface S1 is a convex surface, and its second side surface S2 is a concave surface.

[0260] The second lens L2 has positive refractive power, a first side surface S3 thereof is a concave surface, and a second side surface S4 thereof is a convex surface.

[0261] The third lens L3 has positive refractive power, and its first side surface S5 is a convex surface, and its second side surface S6 is a convex surface.

[0262] The fourth lens L4 has negative refractive power, and its first side surface S8 is concave, and its second side surface S9 is concave.

[0263] The fifth lens L5 has positive refractive power, and its first side surface S9 is a convex surface, and its second side surface S10 is a convex surface.

[0264] The sixth lens L6 has positive refractive power, and its first side surface S11 is convex, and its second side surface S12 is concave.

[0265] An image plane IMA is disposed on the second side of the optical lens, and a filter is disposed between the sixth lens L6 and the image plane IMA, and the filter has a first side surface S13 and a second side surface S14. When IMA is an imaging surface, light from an object sequentially passes through each surface S1 to S14 and is finally imaged on IMA. When IMA is an image source surface, light from IMA sequentially passes through each surface S14 to S1 and is finally projected on the object.

[0266] Table 17 shows the basic parameter table of the optical lens of Example 9, wherein the units of the radius of curvature and thickness / distance are all millimeters (mm).

[0267] Table 17

[0268] Face number Radius of curvature Thickness / distance Refractive Index Abbe number infinity infinity S1 26.0214 1.1852 1.80 46.57 S2 3.3407 2.3558 S3 -3.4976 1.2871 1.64 23.53 S4 -3.8815 0.5871 S5 7.8178 2.2214 2.00 25.44 S6 -12.2059 0.3131 STO infinity 0.1769 S8 -244.4160 0.5980 1.95 17.94 S9 3.5419 2.9831 1.73 54.67 S10 -7.5518 0.1986 S11 14.3119 1.2934 1.54 56.11 S12 27.3818 3.2424 S13 infinity 0.8000 1.52 64.21 S14 infinity 0.1500 IMA / /

[0269] In Example 9, the first side surface S3 and the second side surface S4 of the second lens L2 and the first side surface S11 and the second side surface S12 of the sixth lens L6 are all aspherical surfaces. Table 18 shows the cone coefficient k and the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical surfaces S3, S4, S11 and S12 that can be used in Example 9.

[0270] Table 18

[0271] Face number k A4 A6 A8 A10 A12 A14 A16 S3 -0.9628 -7.3036E-03 -7.3691E-05 7.2290E-05 2.5295E-07 2.5451E-06 -6.6764E-07 4.6419E-08 S4 -0.1968 -7.5388E-04 -1.7462E-05 7.9129E-05 3.0389E-06 -3.8164E-06 6.7667E-07 -3.8157E-08 S11 -8.3229 -5.3959E-04 -2.4672E-05 -1.2859E-04 3.0673E-05 -4.8451E-06 2.9521E-07 -1.8198E-09 S12 -114.9600 3.2781E-03 -5.9610E-04 1.3270E-04 -3.8071E-05 4.8125E-06 -2.7548E-07 5.2923E-09

[0272] The MTF peak of the optical lens of Example 9 exceeds 0.85 at a spatial frequency of 65 lp / mm (65 lines / mm). Fig.19 The distortion curve of the optical lens of Example 9 is shown. Therefore, the optical lens of Example 9 can achieve good imaging quality. Example 10

[0273] The following reference Fig. 20 An optical lens according to Example 10 of the present application is described.

[0274] like Fig. 20 As shown, the optical lens includes, from the first side to the second side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6. The aperture STO can be disposed between the third lens L3 and the fourth lens L4. The fourth lens L4 and the fifth lens L5 are cemented to form a cemented lens. The first side surface S11 and the second side surface S12 of the sixth lens L6 each have at least one inflection point. The second lens L2 and the sixth lens L6 are aspherical lenses.

[0275] The first lens L1 has negative refractive power, and its first side surface S1 is a convex surface, and its second side surface S2 is a concave surface.

[0276] The second lens L2 has positive refractive power, a first side surface S3 thereof is a concave surface, and a second side surface S4 thereof is a convex surface.

[0277] The third lens L3 has positive refractive power, and its first side surface S5 is a convex surface, and its second side surface S6 is a convex surface.

[0278] The fourth lens L4 has negative refractive power, and its first side surface S8 is concave, and its second side surface S9 is concave.

[0279] The fifth lens L5 has positive refractive power, and its first side surface S9 is a convex surface, and its second side surface S10 is a convex surface.

[0280] The sixth lens L6 has positive refractive power, and its first side surface S11 is convex, and its second side surface S12 is concave.

[0281] An image plane IMA is disposed on the second side of the optical lens, and a filter is disposed between the sixth lens L6 and the image plane IMA, and the filter has a first side surface S13 and a second side surface S14. When IMA is an imaging surface, light from an object sequentially passes through each surface S1 to S14 and is finally imaged on IMA. When IMA is an image source surface, light from IMA sequentially passes through each surface S14 to S1 and is finally projected on the object.

[0282] Table 19 shows the basic parameter table of the optical lens of Example 10, wherein the units of the radius of curvature and thickness / distance are all millimeters (mm).

[0283] Table 19

[0284] Face number Radius of curvature Thickness / distance Refractive Index Abbe number infinity infinity S1 55.6429 1.1701 1.80 46.57 S2 3.6087 1.7762 S3 -3.2874 1.2803 1.64 23.53 S4 -3.6831 0.2955 S5 6.9457 2.2279 2.00 25.44 S6 -10.1864 0.0744 STO infinity 0.2499 S8 -76.5720 0.5959 1.95 17.94 S9 3.3146 3.1319 1.73 54.67 S10 -6.5388 0.1997 S11 28.9218 1.2902 1.54 56.11 S12 38.4317 2.7874 S13 infinity 0.8000 1.52 64.21 S14 infinity 0.1500 IMA / /

[0285] In Example 10, the first side surface S3 and the second side surface S4 of the second lens L2 and the first side surface S11 and the second side surface S12 of the sixth lens L6 are all aspherical surfaces. Table 20 shows the cone coefficient k and the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical surfaces S3, S4, S11 and S12 that can be used in Example 10.

[0286] Table 20

[0287] Face number k A4 A6 A8 A10 A12 A14 A16 S3 -0.6580 -8.5087E-03 -2.2497E-05 1.0558E-04 2.7884E-05 2.0719E-06 -2.6135E-06 3.0774E-07 S4 -0.1803 -9.5987E-04 9.7121E-05 1.1410E-04 7.5046E-06 -4.7401E-06 4.5476E-07 4.6476E-09 S11 -106.9200 -1.0892E-03 -3.7594E-04 -1.1110E-04 3.2388E-05 -5.5077E-06 1.7448E-07 1.5298E-08 S12 -200.0000 2.6921E-03 -7.9315E-04 1.3922E-04 -3.7955E-05 4.7736E-06 -2.7760E-07 5.7750E-09

[0288] The MTF peak value of the optical lens of Example 10 at a spatial frequency of 65 lp / mm (65 lines / mm) exceeds 0.82. Fig.21 The distortion curve of the optical lens of Example 10 is shown. Therefore, the optical lens of Example 10 can achieve good imaging quality. Embodiment 11

[0289] The following reference Fig. 22 Describe the optical lens according to Example 11 of the present application.

[0290] like Fig. 22 As shown, the optical lens includes, from the first side to the second side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6. The aperture STO can be disposed between the third lens L3 and the fourth lens L4. The fourth lens L4 and the fifth lens L5 are cemented to form a cemented lens. The second lens L2 and the sixth lens L6 are aspherical lenses.

[0291] The first lens L1 has negative refractive power, and its first side surface S1 is a convex surface, and its second side surface S2 is a concave surface.

[0292] The second lens L2 has positive refractive power, a first side surface S3 thereof is a concave surface, and a second side surface S4 thereof is a convex surface.

[0293] The third lens L3 has positive refractive power, and its first side surface S5 is a convex surface, and its second side surface S6 is a concave surface.

[0294] The fourth lens L4 has positive refractive power, and its first side surface S8 is a convex surface, and its second side surface S9 is a convex surface.

[0295] The fifth lens L5 has negative refractive power, and its first side surface S9 is concave, and its second side surface S10 is convex.

[0296] The sixth lens L6 has positive refractive power, and its first side surface S11 is convex, and its second side surface S12 is concave.

[0297] An image plane IMA is disposed on the second side of the optical lens, and a filter is disposed between the sixth lens L6 and the image plane IMA, and the filter has a first side surface S13 and a second side surface S14. When IMA is an imaging surface, light from an object sequentially passes through each surface S1 to S14 and is finally imaged on IMA. When IMA is an image source surface, light from IMA sequentially passes through each surface S14 to S1 and is finally projected on the object.

[0298] Table 21 shows the basic parameter table of the optical lens of Example 11, wherein the units of the radius of curvature and thickness / distance are all millimeters (mm).

[0299] Table 21

[0300] Face number Radius of curvature Thickness / distance Refractive Index Abbe number infinity infinity S1 45.6424 1.1353 1.80 46.57 S2 3.8138 2.2284 S3 -2.9217 1.2810 1.64 23.53 S4 -3.3667 0.1490 S5 5.4285 1.4569 2.00 25.44 S6 6.8405 0.5577 STO infinity 0.1960 S8 7.1245 3.5252 1.73 54.67 S9 -3.1217 0.5981 1.95 17.94 S10 -6.3995 0.1911 S11 10.9922 1.2969 1.54 56.11 S12 52.2723 3.5490 S13 infinity 0.8000 1.52 64.21 S14 infinity 0.1500 IMA / /

[0301] In Example 11, the first side surface S3 and the second side surface S4 of the second lens L2 and the first side surface S11 and the second side surface S12 of the sixth lens L6 are all aspherical surfaces. Table 22 lists the conic coefficients of the aspherical surfaces S3, S4, S11, and S12 that can be used in Example 11. k And the higher-order coefficients A4, A6, A8, A10, A12, A14 and A16.

[0302] Table 22

[0303] Face number k A4 A6 A8 A10 A12 A14 A16 S3 -1.3529 -5.4285E-03 2.5660E-04 -3.8428E-05 1.0081E-05 8.7891E-06 -2.4492E-06 1.7070E-07 S4 -0.9500 -4.5056E-04 -2.8242E-04 1.1194E-04 5.6883E-06 -6.6132E-06 1.2021E-06 -7.4821E-08 S11 11.6540 1.9168E-03 1.1082E-04 -1.4328E-04 3.1367E-05 -4.2632E-06 1.9745E-07 1.2379E-09 S12 200.0000 7.2684E-03 -2.1036E-04 1.2796E-04 -3.8418E-05 5.1374E-06 -4.5099E-07 2.0472E-08

[0304] The MTF peak value of the optical lens of Example 11 at a spatial frequency of 65 lp / mm (65 lines / mm) exceeds 0.83. Fig.23 The distortion curve of the optical lens of Example 11 is shown. Therefore, the optical lens of Example 11 can achieve good imaging quality. Example 12

[0305] The following reference Fig.24 Describe the optical lens according to Example 12 of the present application.

[0306] like Fig.24 As shown, the optical lens includes, from the first side to the second side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6. The aperture STO can be disposed between the third lens L3 and the fourth lens L4. The fourth lens L4 and the fifth lens L5 are cemented to form a cemented lens. The second lens L2 and the sixth lens L6 are aspherical lenses.

[0307] The first lens L1 has negative refractive power, and its first side surface S1 is a convex surface, and its second side surface S2 is a concave surface.

[0308] The second lens L2 has positive refractive power, a first side surface S3 thereof is a concave surface, and a second side surface S4 thereof is a convex surface.

[0309] The third lens L3 has positive refractive power, and its first side surface S5 is a convex surface, and its second side surface S6 is a concave surface.

[0310] The fourth lens L4 has positive refractive power, and its first side surface S8 is a convex surface, and its second side surface S9 is a convex surface.

[0311] The fifth lens L5 has negative refractive power, and its first side surface S9 is concave, and its second side surface S10 is convex.

[0312] The sixth lens L6 has positive refractive power, and its first side surface S11 is convex, and its second side surface S12 is concave.

[0313] An image plane IMA is disposed on the second side of the optical lens, and a filter is disposed between the sixth lens L6 and the image plane IMA, and the filter has a first side surface S13 and a second side surface S14. When IMA is an imaging surface, light from an object sequentially passes through each surface S1 to S14 and is finally imaged on IMA. When IMA is an image source surface, light from IMA sequentially passes through each surface S14 to S1 and is finally projected on the object.

[0314] Table 23 shows the basic parameter table of the optical lens of Example 12, wherein the units of the radius of curvature and thickness / distance are all millimeters (mm).

[0315] Table 23

[0316] Face number Radius of curvature Thickness / distance Refractive Index Abbe number infinity infinity S1 140.0572 1.0612 1.91 35.26 S2 4.0488 2.2436 S3 -2.8873 1.2232 1.64 23.53 S4 -3.3164 0.1440 S5 6.0363 1.5198 2.00 25.44 S6 8.8662 0.7264 STO infinity 0.4789 S8 5.6964 3.4382 1.73 54.67 S9 -3.8147 0.5261 1.95 17.94 S10 -10.1288 0.1736 S11 11.9911 1.3050 1.54 56.11 S12 451.7706 3.5528 S13 infinity 0.8000 1.52 64.21 S14 infinity 0.1500 IMA / /

[0317] In Example 12, the first side surface S3 and the second side surface S4 of the second lens L2 and the first side surface S11 and the second side surface S12 of the sixth lens L6 are all aspherical surfaces. Table 24 shows the cone coefficient k and the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical surfaces S3, S4, S11 and S12 that can be used in Example 12.

[0318] Table 24

[0319] Face number k A4 A6 A8 A10 A12 A14 A16 S3 -1.4640 -5.1607E-03 3.5225E-04 -9.3864E-05 1.5449E-05 7.9955E-06 -2.4205E-06 1.8183E-07 S4 -0.9151 -1.9481E-04 -3.0850E-04 1.1866E-04 3.7607E-06 -7.7142E-06 1.3761E-06 -7.6227E-08 S11 11.2090 3.0686E-03 -1.3006E-04 -8.7175E-05 3.1037E-05 -5.8278E-06 3.3337E-07 3.6823E-09 S12 -199.0500 1.0174E-02 -2.5050E-04 1.8469E-04 -4.9376E-05 5.9219E-06 -4.1449E-07 1.5373E-08

[0320] The MTF peak of the optical lens of Example 12 exceeds 0.80 at a spatial frequency of 65 lp / mm (65 lines / mm). Fig.25 The distortion curve of the optical lens of Example 12 is shown. Therefore, the optical lens of Example 12 can achieve good imaging quality.

[0321] Tables 25-1 and 25-2 give the basic parameters of the optical lenses in Examples 1-12, such as F, ENPD, TTL, FOV, θ, H, D, BFL, F1, F2, F3, F4, F5, F+, F6, F45, MIN[F3, F+], D62, sag11, sag21, sag22, sag61 and sag62.

[0322] Table 25-1

[0323] Parameters / Examples 1 2 3 4 5 6 F(mm) 3.3602 3.4938 3.7623 3.7342 3.2569 3.4945 ENPD(mm) 1.8163 1.8885 2.0337 2.0185 1.7605 1.8889 TTL(mm) 17.406 16.0365 17.4345 17.4513 17.1703 17.1716 FOV(°) 116.6326 119.8956 112.431 112.0456 114.8532 118.639 θ 2.0356 2.0926 1.9623 1.9556 2.0046 2.0706 H(mm) 6.6085 6.6077 6.609 6.609 6.6089 6.6091 D(mm) 7.7838 6.7363 7.6712 7.3826 7.493 7.4389 BFL(mm) 4.2528 3.9059 4.6266 4.5414 4.0154 4.3702 F1(mm) -4.9989 -4.8798 -5.3747 -5.8002 -5.1674 -5.5159 F2(mm) -53.2773 -55.7732 -59.3773 -85.9883 -49.1561 -55.651 F3(mm) 5.0719 4.4562 4.9999 4.9987 10.201 13.3816 F4(mm) -3.9147 -3.5864 -2.9273 -3.0116 3.4764 3.6474 F5(mm) 3.8171 3.5761 2.9994 3.2808 -6.0883 -6.6238 F+(mm) 3.8171 3.5761 2.9994 3.2808 3.4764 3.6474 F6(mm) 25.3671 40.778 41.8923 28.521 23.7515 22.7499 F45(mm) 23.2316 20.6681 17.1257 35.4756 6.9006 6.5667 MIN[F3, F+](mm) 3.8171 3.5761 2.9994 3.2808 3.4764 3.6474 D62(mm) 5.2781 5.3349 5.2188 5.2267 5.3206 5.1241 sag11(mm) 0.4563 0.1990 0.1230 0.0481 0.5418 0.0545 sag21(mm) -1.0320 -0.8746 -0.8900 -0.9120 -1.0055 -1.1375 sag22(mm) -0.6368 -0.5788 -0.5911 -0.6407 -0.6395 -0.8058 sag61(mm) 0.3052 0.0699 -0.0804 0.2559 0.2714 0.3099 sag62(mm) 0.1932 0.0333 -0.2413 0.1576 0.2748 0.3225

[0324] Table 25-2

[0325] Parameters / Examples 7 8 9 10 11 12 F(mm) 3.7625 3.5734 3.4277 3.5221 3.4503 3.3916 ENPD(mm) 2.0338 1.9316 1.8528 1.9038 1.865 1.8333 TTL(mm) 17.4534 17.5771 17.392 16.0293 17.1148 17.3428 FOV(°) 111.4093 109.5996 118.0186 120.5754 117.9209 116.9797 θ 1.9445 1.9129 2.0598 2.1044 2.0581 2.0417 H(mm) 6.609 6.6089 6.6086 6.6079 6.6088 6.6098 D(mm) 7.5411 8.0697 7.4412 6.6167 7.2886 6.983 BFL(mm) 4.3072 4.2154 4.1924 3.7374 4.499 4.5028 F1(mm) -5.7277 -5.8519 -4.8562 -4.8237 -5.2129 -4.5639 F2(mm) -89.6643 -57.1204 173.2605 175.4596 263.3924 290.4073 F3(mm) 5.5531 5.4814 4.997 4.3749 17.1482 14.7461 F4(mm) -3.3702 -3.3183 -3.639 -3.3033 3.4684 3.6825 F5(mm) 3.1145 3.0771 3.7146 3.4697 -6.9833 -6.657 F+(mm) 3.1145 3.0771 3.7146 3.4697 3.4684 3.6825 F6(mm) -157.3877 -209.6889 53.7406 206.9121 25.5315 22.8195 F45(mm) 11.2956 11.0967 24.6179 20.8897 6.1771 6.5459 MIN[F3, F+](mm) 3.1145 3.0771 3.7146 3.4697 3.4684 3.6825 D62(mm) 5.1821 5.1701 5.2419 5.3169 5.2562 4.9595 sag11 0.0037 0.4112 0.2674 0.0984 0.1457 0.0435 sag21 -0.8777 -0.9137 -1.0077 -0.8841 -1.0944 -1.1194 sag22 -0.5832 -0.5745 -0.7483 -0.6785 -0.8918 -1.0029 sag61(mm) 0.2224 0.2596 0.1001 -0.0779 0.4139 0.3672 sag62(mm) 0.3762 0.4220 0.1109 -0.0044 0.368 0.377

[0326] In summary, the conditional expressions of each embodiment in Embodiments 1 to 12 satisfy the relationship shown in Table 26-1 and Table 26-2.

[0327] Table 26-1

[0328] Conditional / Example 1 2 3 4 5 6 TTL / F 5.1800 4.5900 4.6340 4.6734 5.2720 4.9139 F+ / F 1.1360 1.0236 0.7972 0.8786 1.0674 1.0438 F3 / F 1.5094 1.2755 1.3289 1.3386 3.1321 3.8293 MIN[F3, F+] / F 1.1360 1.0236 0.7972 0.8786 1.0674 1.0438 d31×F3 / (TTL×F) 0.1923 0.1783 0.1798 0.1779 0.2852 0.3360 (|F4| + |F5|) / F 2.3010 2.0501 1.5753 1.6851 2.9367 2.9392 (d41 + d51)×(|F4| + |F5|) / (TTL×F) 0.4612 0.4565 0.2999 0.3232 0.7406 0.6591 |sag21 - sag22| / d21 0.3069 0.2308 0.2202 0.1703 0.2842 0.2605 |F2| / F 15.8554 15.9635 15.7822 23.0272 15.0929 15.9253 |H / (F×θ) - 1| 0.0338 0.0962 0.1048 0.0950 0.0123 0.0866 |F6| / F 7.5493 11.6715 11.1348 7.6378 7.2927 6.5102 (d21 + d61) / BFL 0.6053 0.6566 0.5686 0.6313 0.6416 0.5803 BFL / TTL 0.2443 0.2436 0.2654 0.2602 0.2339 0.2545 arctan(|sag62 / D62|) 2.0963 0.3576 2.6473 1.7271 2.9566 3.6013 F1 / F -1.4877 -1.3967 -1.4286 -1.5533 -1.5866 -1.5785 F45 / F 6.9138 5.9157 4.5519 9.5002 2.1188 1.8792 d11 / TTL 0.0679 0.0725 0.0678 0.0677 0.0638 0.0696 |sag61 - sag62| / d61 0.0870 0.0285 0.1264 0.0772 0.0026 0.0100 R61 / R62 0.3197 0.3426 0.1593 0.1713 0.2002 0.0248 R11 / R12 5.3330 8.4070 15.4809 32.5763 4.3273 29.6174 F / ENPD 1.8500 1.8500 1.8500 1.8500 1.8500 1.8500 TTL / H / FOV×180° 4.0649 3.6436 4.2234 4.2420 4.0717 3.9420 D / H / FOV×180° 1.8178 1.5305 1.8583 1.7945 1.7769 1.7077 F / H 0.5085 0.5287 0.5693 0.5650 0.4928 0.5287 (FOV×F) / H 59.3038 63.3944 64.0035 63.3077 56.6002 62.7293 R21 / R22 0.7837 0.7868 0.7817 0.7962 0.7738 0.7816 sag11 / R11 0.0271 0.0070 0.0021 0.0003 0.0410 0.0004 d21 / d11 1.0888 1.1026 1.1477 1.3481 1.1754 1.0660 R11 / F1 -3.3662 -5.8624 -11.1365 -24.4179 -2.5593 -23.0258 |F+ / F-| 0.9751 0.9971 1.0246 1.0894 0.5710 0.5507

[0329] Table 26-2

[0330] Condition / Example 7 8 9 10 11 12 TTL / F 4.6388 4.9189 5.0740 4.5511 4.9604 5.1135 F+ / F 0.8278 0.8611 1.0837 0.9851 1.0052 1.0858 F3 / F 1.4759 1.5339 1.4578 1.2421 4.9701 4.3478 MIN[F3, F+] / F 0.8278 0.8611 1.0837 0.9851 1.0052 1.0858 d31×F3 / (TTL×F) 0.1923 0.1964 0.1862 0.1726 0.4231 0.3810 (|F4| + |F5|) / F 1.7235 1.7897 2.1453 1.9230 3.0292 3.0486 (d41 + d51)×(|F4| + |F5|) / (TTL×F) 0.3538 0.3633 0.4417 0.4472 0.7298 0.6969 |sag21 - sag22| / d21 0.2181 0.2617 0.2015 0.1606 0.1582 0.0952 |F2| / F 23.8310 15.9849 50.5472 49.8168 76.3390 85.6255 |H / (F×θ) - 1| 0.0967 0.0332 0.0640 0.1085 0.0693 0.0455 |F6| / F 41.8306 58.6805 15.6783 58.7468 7.3998 6.7282 (d21 + d61) / BFL 0.6130 0.6117 0.6155 0.6878 0.5730 0.5615 BFL / TTL 0.2468 0.2398 0.2411 0.2332 0.2629 0.2596 arctan(|sag62 / D62|) 4.1522 4.6663 1.2120 0.0474 4.0049 4.3470 F1 / F -1.5223 -1.6376 -1.4168 -1.3696 -1.5109 -1.3456 F45 / F 3.0022 3.1054 7.1820 5.9310 1.7903 1.9300 d11 / TTL 0.0677 0.0666 0.0681 0.0730 0.0663 0.0612 |sag61 - sag62| / d61 0.1193 0.1266 0.0084 0.0570 0.0354 0.0075 R61 / R62 1.1694 1.1361 0.5227 0.7526 0.2103 0.0265 R11 / R12 430.8011 5.5448 7.7892 15.4191 11.9677 34.5923 F / ENPD 1.8500 1.8500 1.8500 1.8500 1.8500 1.8500 TTL / H / FOV×180° 4.2667 4.3680 4.0139 3.6213 3.9530 4.0373 D / H / FOV×180° 1.8435 2.0054 1.7173 1.4948 1.6835 1.6256 F / H 0.5693 0.5407 0.5187 0.5330 0.5221 0.5131 (FOV×F) / H 63.4253 59.2600 61.2130 64.2683 61.5637 60.0243 R21 / R22 0.8189 0.7817 0.9011 0.8926 0.8678 0.8706 sag11 / R11 0.0000019 0.0206 0.0103 0.0018 0.0032 0.0003 d21 / d11 1.1424 1.1078 1.0860 1.0942 1.1283 1.1527 R11 / F1 -333.5198 -3.4177 -5.3584 -11.5353 -8.7557 -30.6881 |F+ / F-| 0.9241 0.9273 1.0208 1.0504 0.4967 0.5532

[0331] The present application also provides an electronic device, which includes the optical lens in the above exemplary embodiment and an imaging element for converting an optical image formed by the optical lens into an electrical signal, wherein the imaging element is arranged on an imaging surface or an image source surface, and may be, for example, a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS).

[0332] 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 method comprises, in order from the first side to the second side along the optical axis: A first lens having negative optical power, wherein the first side surface is convex and the second side surface 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 element having positive power, wherein the first side surface of the third lens element is convex; a fourth lens having optical power; a fifth lens having optical power; and a sixth lens having optical power, wherein the first side surface is convex and the second side surface is concave; Wherein, one of the fourth lens and the fifth lens has positive optical power, and the other has negative optical power; wherein the number of lenses having optical power in the optical lens is six; Wherein, the optical lens satisfies: |F6| / F≥2, (d21+d61) / BFL≤0.9, |F2| / F≥12, 0.5≤d21 / d11≤1.5, and 0.22≤BFL / TTL≤0.275, Among them, F6 is the effective focal length of the sixth lens, F is the total effective focal length of the optical lens, d21 is the center thickness of the second lens on the optical axis, d61 is the center thickness of the sixth lens on the optical axis, BFL is the distance from the center of the second side surface of the sixth lens to the imaging surface of the optical lens on the optical axis, F2 is the effective focal length of the second lens, d11 is the center thickness of the first lens on the optical axis, and TTL is the distance from the first side surface of the first lens to the imaging surface of the optical lens on the optical axis.

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

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

4. The optical lens according to claim 1, wherein: The fourth lens and the fifth lens are cemented together to form a cemented lens, wherein: The fourth lens has negative power, a first side surface thereof is convex, and a second side surface thereof is concave, and the fifth lens has positive power, a first side surface thereof is convex, and a second side surface thereof is convex; or The fourth lens has negative power, and its first side surface is concave, and its second side surface is concave; the fifth lens has positive power, and its first side surface is convex, and its second side surface is convex; or The fourth lens has positive optical power, and its first side surface is convex, and its second side surface is convex; the fifth lens has negative optical power, and its first side surface is concave, and its second side surface is convex.

5. The optical lens according to claim 1, characterized in that: The sixth lens has positive or negative power.

6. The optical lens according to any one of claims 1 to 5, characterized in that: A distance TTL from the first side surface of the first lens to the imaging surface of the optical lens on the optical axis and a total effective focal length F of the optical lens satisfy TTL / F≤6.

7. The optical lens according to any one of claims 1 to 5, characterized in that: MIN[F3, F+] / F≤5, Wherein, MIN[F3, F+] represents the smaller of the effective focal length F3 of the third lens and the positive effective focal length F+ of the fourth lens and the fifth lens, and F is the total effective focal length of the optical lens.

8. The optical lens according to claim 7, characterized in that: The positive effective focal length F+ of the fourth lens and the fifth lens and the total effective focal length F of the optical lens satisfy: F+ / F≤1.

6.

9. The optical lens according to any one of claims 1 to 5, characterized in that: The effective focal length F3 of the third lens and the total effective focal length F of the optical lens satisfy: F3 / F≤6.

5.

10. The optical lens according to any one of claims 1 to 5, characterized in that: The vector height sag21 at the maximum clear aperture of the first side surface of the second lens corresponding to the maximum field angle of the optical lens, the vector height sag22 at the maximum clear aperture of the second side surface of the second lens corresponding to the maximum field angle of the optical lens, and the center thickness d21 of the second lens on the optical axis satisfy: |sag21-sag22| / d21≤0.

45.

11. The optical lens according to any one of claims 1 to 5, characterized in that: The image height H corresponding to the maximum field angle of the optical lens, the total effective focal length F of the optical lens and the arc value θ of the maximum field angle of the optical lens satisfy: |H / (F×θ)-1|≤0.

3.

12. The optical lens according to any one of claims 1 to 5, characterized in that: The effective focal length F1 of the first lens and the total effective focal length F of the optical lens satisfy: -5≤F1 / F.

13. The optical lens according to any one of claims 1 to 5, characterized in that: The combined focal length F45 of the fourth lens and the fifth lens and the total effective focal length F of the optical lens satisfy the following: F45 / F≤15.

14. The optical lens according to any one of claims 1 to 5, characterized in that: The vector height sag61 at the maximum clear aperture of the first side surface of the sixth lens corresponding to the maximum field angle of the optical lens, the vector height sag62 at the maximum clear aperture of the second side surface of the sixth lens corresponding to the maximum field angle of the optical lens, and the center thickness d61 of the sixth lens on the optical axis satisfy: |sag61-sag62| / d61≤0.

4.

15. The optical lens according to any one of claims 1 to 5, characterized in that: A curvature radius R61 of the first side surface of the sixth lens and a curvature radius R62 of the second side surface of the sixth lens satisfy: 0<R61 / R62≤3.

16. The optical lens according to any one of claims 1 to 5, characterized in that: A curvature radius R11 of the first side surface of the first lens and a curvature radius R12 of the second side surface of the first lens satisfy: R11 / R12≥3.

17. The optical lens according to any one of claims 1 to 5, characterized in that: The distance TTL from the first side surface of the first lens to the imaging surface of the optical lens on the optical axis, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy: TTL / H / FOV×180°≤8.

18. The optical lens according to any one of claims 1 to 5, characterized in that: The optical lens satisfies at least one of the following conditions: d31×F3 / (TTL×F)≤0.8; (|F4|+|F5|) / F≤5; (d41+d51)×(|F4|+|F5|) / (TTL×F)≤1.2; arctan(|sag62 / D62|)≤10°; 0.03≤d11 / TTL≤0 .5; F / ENPD≤2; D / H / FOV×180°≤6; 0.2≤F / H≤1.2; (FOV×F) / H≥50°; 0<R21 / R22≤2; sag11 / R11≤0.06; R11 / F1≤-2.1; 0.3≤|F+ / F-|≤1.5; Wherein, TTL is the distance from the first side surface of the first lens to the imaging surface of the optical lens on the optical axis, F is the total effective focal length of the optical lens, F+ is the positive effective focal length of the fourth lens and the fifth lens, F- is the negative effective focal length of the fourth lens and the fifth lens, F3 is the effective focal length of the third lens, MIN[F3, F+] represents the smaller of the effective focal length F3 of the third lens and the positive effective focal length F+ of the fourth lens and the fifth lens, d31 is the center thickness of the third lens on the optical axis, F4 is the effective focal length of the fourth lens, F5 is the effective focal length of the fifth lens, d41 is the center thickness of the fourth lens on the optical axis, d51 is the center thickness of the fifth lens on the optical axis, H is the image height corresponding to the maximum field angle of the optical lens, sag6 2 is the sag height at the maximum clear aperture of the second side surface of the sixth lens corresponding to the maximum field angle of the optical lens, D62 is the maximum clear aperture of the second side surface of the sixth lens corresponding to the maximum field angle of the optical lens, F1 is the effective focal length of the first lens, d11 is the center thickness of the first lens on the optical axis, ENPD is the entrance pupil diameter of the optical lens, FOV is the maximum field angle of the optical lens, D is the maximum clear aperture of the first side surface of the first lens corresponding to the maximum field angle of the optical lens, R21 is the curvature radius of the first side surface of the second lens, R22 is the curvature radius of the second side surface of the second lens, R11 is the curvature radius of the first side surface of the first lens, and sag11 is the sag height at the maximum clear aperture of the first side surface of the first lens corresponding to the maximum field angle of the optical lens.

19. The optical lens according to any one of claims 1 to 5, characterized in that: The optical lens satisfies at least one of the following conditions: 4.5511≤TTL / F≤5.272;0.7972≤F+ / F≤1.136;1.2421≤F3 / F≤4.9701;0.7972≤MIN[F3、F+] / F≤1.136;0.1726≤d31×F3 / (TTL×F)≤0.4231;1.5753≤(|F4|+|F5|) / F≤3.0486;0.2999≤(d41+d51)×(|F4|+|F5|) / (TTL×F)≤0.7406;0.0952≤|sag21-sag22| / d21≤0.3069;15.0929≤|F2| / F≤85.6255;0.0123≤|H / (F×θ)-1|≤0.1085;6.5102≤|F6| / F≤58.7468;0.5615≤(d21+d61) / BFL≤0.6878;0.2332≤BFL / TTL≤0.2654;0.0474°≤arctan(|sag62 / D62|)≤4.6663°;-1.6376≤F1 / F≤-1.3456;1.7903≤F45 / F≤9.5002;0.0612≤d11 / TTL≤0.073;0.0026≤|sag61-sag62| / d61≤0.1266;0.0248≤R61 / R62≤1.1694;4.3273≤R11 / R12≤430.8011;3.6213≤TTL / H / FOV×180°≤4.368; 1.4948≤D / H / FOV×180°≤2.0054;0.4928≤F / H≤0.5693;56.6002°≤(FOV×F) / H≤64.2683°;0.7738≤R21 / R22≤0.9011;0.0000019≤sag11 / R11≤0.041;1.066≤d21 / d11≤1.3481;-333.5198≤R11 / F1≤-2.5593;0.4967≤|F+ / F-|≤1.0894; Wherein, TTL is the distance from the first side surface of the first lens to the imaging surface of the optical lens on the optical axis, F is the total effective focal length of the optical lens, F+ is the positive effective focal length of the fourth lens and the fifth lens, F- is the negative effective focal length of the fourth lens and the fifth lens, F3 is the effective focal length of the third lens, MIN[F3, F+] represents the smaller of the effective focal length F3 of the third lens and the positive effective focal length F+ of the fourth lens and the fifth lens, d31 is the center thickness of the third lens on the optical axis, F4 is the effective focal length of the fourth lens, F5 is the effective focal length of the fifth lens, d41 is the effective focal length of the fourth lens The center thickness of the lens on the optical axis is d51, the center thickness of the fifth lens on the optical axis, sag21 is the sag height at the maximum clear aperture of the first side of the second lens corresponding to the maximum field of view of the optical lens, sag22 is the sag height at the maximum clear aperture of the second side of the second lens corresponding to the maximum field of view of the optical lens, F2 is the effective focal length of the second lens, H is the image height corresponding to the maximum field of view of the optical lens, θ is the radian value of the maximum field of view of the optical lens, F6 is the effective focal length of the sixth lens, d21 is the center thickness of the second lens on the optical axis, and d61 is the center thickness of the sixth lens on the optical axis. degrees, BFL is the distance from the center of the second side surface of the sixth lens to the imaging surface of the optical lens on the optical axis, sag62 is the sag height at the maximum clear aperture of the second side surface of the sixth lens corresponding to the maximum field angle of the optical lens, D62 is the maximum clear aperture of the second side surface of the sixth lens corresponding to the maximum field angle of the optical lens, F1 is the effective focal length of the first lens, F45 is the combined focal length of the fourth lens and the fifth lens, d11 is the center thickness of the first lens on the optical axis, sag61 is the sag height at the maximum clear aperture of the first side surface of the sixth lens corresponding to the maximum field angle of the optical lens, and R61 is the The radius of curvature of the first side surface of the sixth lens, R62 is the radius of curvature of the second side surface of the sixth lens, ENPD is the entrance pupil diameter of the optical lens, FOV is the maximum field of view of the optical lens, D is the maximum clear aperture of the first side surface of the first lens corresponding to the maximum field of view of the optical lens, R21 is the radius of curvature of the first side surface of the second lens, R22 is the radius of curvature of the second side surface of the second lens, R11 is the radius of curvature of the first side surface of the first lens, R12 is the radius of curvature of the second side surface of the first lens, and sag11 is the sag height at the maximum clear aperture of the first side surface of the first lens corresponding to the maximum field of view of the optical lens.

20. The optical lens according to any one of claims 1 to 5, characterized in that: The optical lens satisfies at least one of the following conditions: 4.3≤TTL / F≤5.5;0.7≤F+ / F≤1.25;0.5≤F3 / F≤6.5;0.7≤MIN[F3、F+] / F≤1.3;0.1≤d31×F3 / (TTL×F)≤0.5;1≤(|F4|+|F5|) / F≤3.5;0.15≤(d41+d51)×(|F4|+|F5|) / (TTL×F)≤0.9;0.05≤|sag21-sag22| / d21≤0.4;12≤|F2| / F≤120;0.005≤|H / (F×θ)-1|≤0.165;2≤|F6| / F≤90;0.5≤(d21+d61) / BFL≤0.72;arctan(|sag62 / D62|)≤7.5°;-1.75≤F1 / F≤-1.25;0.5≤F45 / F≤13;0.055≤d11 / TTL≤0.08;|sag61-sag62| / d61≤0.2;0<R61 / R62≤2;3≤R11 / R12≤700;1.8≤F / ENPD≤1.9;3.3≤TTL / H / FOV×180°≤4.5;1.3≤D / H / FOV×180°≤2.15;0.45≤F / H≤0.6;55°≤(FOV×F) / H≤67°;0.72≤R21 / R22≤0.95;sag11 / R11≤0.068;0.95≤d21 / d11≤1.4;-550≤R11 / F1≤-2.1;0.3≤|F+ / F-|≤1.3; Wherein, TTL is the distance from the first side surface of the first lens to the imaging surface of the optical lens on the optical axis, F is the total effective focal length of the optical lens, F+ is the positive effective focal length of the fourth lens and the fifth lens, F- is the negative effective focal length of the fourth lens and the fifth lens, F3 is the effective focal length of the third lens, MIN[F3, F+] represents the smaller of the effective focal length F3 of the third lens and the positive effective focal length F+ of the fourth lens and the fifth lens, d31 is the center thickness of the third lens on the optical axis, F4 is the effective focal length of the fourth lens, and F5 is the effective focal length of the fifth lens , d41 is the center thickness of the fourth lens on the optical axis, d51 is the center thickness of the fifth lens on the optical axis, sag21 is the sag height at the maximum clear aperture of the first side surface of the second lens corresponding to the maximum field of view of the optical lens, sag22 is the sag height at the maximum clear aperture of the second side surface of the second lens corresponding to the maximum field of view of the optical lens, F2 is the effective focal length of the second lens, H is the image height corresponding to the maximum field of view of the optical lens, θ is the radian value of the maximum field of view of the optical lens, F6 is the effective focal length of the sixth lens, d21 is the center thickness of the second lens on the optical axis, d61 is the center thickness of the sixth lens on the optical axis, sag62 is the sag height at the maximum clear aperture of the second side surface of the sixth lens corresponding to the maximum field angle of the optical lens, D62 is the maximum clear aperture of the second side surface of the sixth lens corresponding to the maximum field angle of the optical lens, F1 is the effective focal length of the first lens, F45 is the combined focal length of the fourth lens and the fifth lens, d11 is the center thickness of the first lens on the optical axis, sag61 is the sag height at the maximum clear aperture of the first side surface of the sixth lens corresponding to the maximum field angle of the optical lens, and R61 is the first side surface of the sixth lens wherein R62 is the radius of curvature of the second side surface of the sixth lens, ENPD is the entrance pupil diameter of the optical lens, FOV is the maximum field of view of the optical lens, D is the maximum clear aperture of the first side surface of the first lens corresponding to the maximum field of view of the optical lens, R21 is the radius of curvature of the first side surface of the second lens, R22 is the radius of curvature of the second side surface of the second lens, R11 is the radius of curvature of the first side surface of the first lens, R12 is the radius of curvature of the second side surface of the first lens, and sag11 is the sag height at the maximum clear aperture of the first side surface of the first lens corresponding to the maximum field of view of the optical lens.

21. An electronic device, characterized in that: The invention comprises an optical lens according to any one of claims 1 to 20 and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

Images