Optical lens and electronic equipment

Abstract

The invention discloses an optical lens and electronic equipment comprising the same. The optical lens sequentially comprises a first lens group, a second lens group and a third lens group from a first side to a second side along an optical axis, and the first lens group at least comprises a first lens which is closest to the first side and has focal power; the second lens group at least comprises three lenses with focal power; and the third lens group comprises the last lens with focal power. The paraxial region of the first side surface of the first lens is a convex surface; the edge field angle arctan (1 / K (S1)) of the first side surface of the first lens at the maximum field angle of the optical lens and the field angle G1-theta 2 at the half aperture of the first side surface of the first lens meet the condition that arctan (1 / K (S1)) / G1-theta 2 is smaller than or equal to 0.4. The angular resolution value of the optical lens is gradually reduced along with the gradual increase of the field angle of the optical lens from the center to the edge.

Description

Technical Field

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

[0002] In recent years, optical lens technology has been continuously developing and progressing, and optical lenses have been increasingly widely used in many fields including smartphones, security monitoring, automotive assisted driving, intelligent detection, and virtual reality. At the same time, lens manufacturers in various fields have also actively invested in and are committed to researching and improving the performance and technology of optical lenses in order to improve the quality and competitiveness of their own products.

[0003] With the rapid development of machine vision-based autonomous driving technology, automobile manufacturers have higher and higher requirements for the imaging quality of visual images. Specifically, in order to obtain a larger amount of information, the front view lens needs to image a larger field of view angle. At the same time, in order to meet the requirements of specific usage scenarios, it is necessary to take into account long focal length (telephoto), and it is required that the central imaging area of the lens has a high angular magnification. However, in the prior art, while meeting a large field of view angle, the central angular resolution is not high enough. Therefore, those skilled in the art expect to optimize the design of the lens, especially by better designing the first lens in the lens, so as to achieve a large angular resolution at the center of the lens, which is beneficial to special distortion.

[0004] At the same time, in order to ensure clear imaging, it is also necessary to further improve the resolution of the lens; and considering the aesthetics and space of the product, the in-vehicle lens also needs to meet the requirements of miniaturization to micro-miniaturization. However, it is usually difficult for the prior art to simultaneously meet the requirements of high resolution and miniaturization; in addition, in order to adapt to driving environments with insufficient light such as rainy days and nights, it is also required that the lens can have a large light entrance amount to ensure imaging quality. Therefore, in view of the above problems and the development status of optical lenses, those skilled in the art are committed to designing and researching optical lenses with better performance to meet the high requirements of the continuously developing market applications. Summary of the Invention

[0005] The present application provides an optical lens, which sequentially includes a first lens group, a second lens group, and a third lens group along the optical axis from the first side to the second side. Among them, the first lens group at least includes a first lens closest to the first side and having a focal power; the second lens group at least includes three lenses having a focal power; the third lens group includes the last lens having a focal power; the paraxial region of the first side of the first lens is a convex surface; the edge opening angle arctan(1 / K(S1)) of the first side of the first lens at the maximum field of view angle of the optical lens and the opening angle G at the half-aperture of the first side of the first lens 1-θ2 Satisfy: arctan(1 / K(S1)) / G 1-θ2≤0.4; and the angular resolution value of the optical lens gradually decreases as the field of view angle of the optical lens gradually increases from the center to the edge.

[0006] In one embodiment, the angular resolution PPDmax corresponding to the central field of view of the optical lens and the angular resolution PPDmin corresponding to the edge field of view of the optical lens may satisfy: PPDmax / PPDmin≥3.

[0007] In one embodiment, the optical lens may satisfy: 3.5≤PPDmax / PPDmin≤12.

[0008] In one embodiment, the first lens group further includes a second lens with a negative focal power, the first side surface of which is convex and the second side surface is concave.

[0009] In one embodiment, the second lens group includes a cemented lens, and the first side surface of the cemented lens is convex.

[0010] In one embodiment, the first side surface of the last lens is convex.

[0011] In one embodiment, the semi-image height H corresponding to one-tenth of the maximum field of view angle of the optical lens (θ / 10) and the image height H corresponding to the maximum field of view angle of the optical lens may satisfy: H (θ / 10) / (H / 2)≥0.22.

[0012] In one embodiment, the optical lens may satisfy: H (θ / 10) / (H / 2)≥0.25.

[0013] In one embodiment, the radius of curvature R3 of the first side surface of the second lens and the total effective focal length F of the optical lens may satisfy: R3 / F≥0.2.

[0014] In one embodiment, the optical lens may satisfy: 0.3≤R3 / F≤15.

[0015] In one embodiment, the edge opening angle arctan(1 / K(S1)) of the first side surface of the first lens at the maximum field of view angle of the optical lens may satisfy: arctan(1 / K(S1))≤10°.

[0016] In one embodiment, the optical lens may satisfy: arctan(1 / K(S1))≤5°.

[0017] In one embodiment, the sagittal height SAG1 corresponding to the first side surface of the first lens at the maximum field of view angle of the optical lens and the maximum effective aperture diameter D corresponding to the first side surface of the first lens at the maximum field of view angle of the optical lens satisfy: arctan(SAG1 / (D / 2)) ≤ 25°.

[0018] In one embodiment, the optical lens satisfies: arctan(SAG1 / (D / 2)) ≤ 20°.

[0019] In one embodiment, the radius of curvature R1 of the first side surface of the first lens and the total effective focal length F of the optical lens satisfy: R1 / F ≥ 0.5.

[0020] In one embodiment, the optical lens satisfies: R1 / F ≥ 1.

[0021] In one embodiment, the sagittal height SAG4 corresponding to the second side surface of the second lens at the maximum field of view angle of the optical lens and the maximum effective aperture diameter D4 corresponding to the second side surface of the second lens at the maximum field of view angle of the optical lens satisfy: arctan(SAG4 / (D4 / 2)) ≥ 10°.

[0022] In one embodiment, the optical lens satisfies: 13° ≤ arctan(SAG4 / (D4 / 2)) ≤ 35°.

[0023] In one embodiment, the central thickness d1 of the first lens on the optical axis and the edge thickness d1e at the maximum effective aperture diameter corresponding to the first lens at the maximum field of view angle of the optical lens satisfy: 0.6 ≤ d1 / d1e ≤ 1.4.

[0024] In one embodiment, the optical lens satisfies: 0.7 ≤ d1 / d1e ≤ 1.25.

[0025] In one embodiment, the radius of curvature RL of the second side surface of the last lens and the total effective focal length F of the optical lens satisfy: |RL / F| ≥ 0.6.

[0026] In one embodiment, the optical lens satisfies: |RL / F| ≥ 1.

[0027] In one embodiment, the edge angle arctan(1 / K(S13)) of the first side surface of the last lens at the maximum field of view angle of the optical lens and the edge angle arctan(1 / K(S14)) of the second side surface of the last lens at the maximum field of view angle of the optical lens may satisfy: arctan(1 / K(S13)) - arctan(1 / K(S14)) ≥ 20°.

[0028] In one embodiment, the optical lens may satisfy: 25° ≤ arctan(1 / K(S13)) - arctan(1 / K(S14)) ≤ 75°.

[0029] In one embodiment, the effective focal length F1 of the first lens and the total effective focal length F of the optical lens may satisfy: |F1 / F| ≥ 2.

[0030] In one embodiment, the optical lens may satisfy: 2.5 ≤ |F1 / F| ≤ 100.

[0031] In one embodiment, the radius of curvature R3 of the first side surface of the second lens and the radius of curvature R4 of the second side surface of the second lens may satisfy: R3 / R4 ≥ 0.8.

[0032] In one embodiment, the optical lens may satisfy: R3 / R4 ≥ 1.2.

[0033] In one embodiment, the central thickness dL of the last lens on the optical axis and the distance TTL from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis may satisfy: dL / TTL ≥ 0.07.

[0034] In one embodiment, the optical lens may satisfy: dL / TTL ≥ 0.09.

[0035] In one embodiment, the effective focal length FL of the last lens and the total effective focal length F of the optical lens may satisfy: |FL / F| ≥ 1.5.

[0036] In one embodiment, the optical lens may satisfy: |FL / F| ≥ 2.

[0037] In one embodiment, the edge angle arctan(1 / K(S3)) of the first side surface of the second lens at the maximum field of view angle of the optical lens and the angle G at the half-aperture of the first side surface of the second lens 2-θ2 may satisfy: arctan(1 / K(S3)) / G 2-θ2 ≤ 0.95.

[0038] In one embodiment, the optical lens may satisfy: arctan(1 / K(S3)) / G 2-θ2 ≤0.9.

[0039] In one embodiment, the optical lens may satisfy: arctan(1 / K(S1)) / G 1-θ2 ≤0.3.

[0040] On the other hand, the present application provides an electronic device, which includes the optical lens provided by the present application and an imaging element for converting the optical image formed by the optical lens into an electrical signal.

[0041] The present application uses seven lenses. By optimizing the shapes, optical powers, etc. of the lenses, the optical lens has at least one beneficial effect such as long focal length and large field of view, high resolution, miniaturization, large aperture, and large angular resolution at the center, so that the optical lens can better meet the high requirements of in-vehicle applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In combination with the drawings, through the detailed description of the following embodiments, other features, objects, and advantages of the present application will become more obvious. In the drawings:

[0043] Figure 1 It is a schematic structural diagram showing the optical lens according to Embodiment 1 of the present application;

[0044] Figure 2 It is a schematic structural diagram showing the optical lens according to Embodiment 2 of the present application;

[0045] Figure 3 It is a schematic structural diagram showing the optical lens according to Embodiment 3 of the present application;

[0046] Figure 4 It is a schematic structural diagram showing the optical lens according to Embodiment 4 of the present application;

[0047] Figure 5 It is a schematic structural diagram showing the optical lens according to Embodiment 5 of the present application;

[0048] Figure 6 It is a schematic structural diagram showing the optical lens according to Embodiment 6 of the present application;

[0049] Figure 7 It is a schematic structural diagram showing the optical lens according to Embodiment 7 of the present application;

[0050] Figure 8 It is a schematic structural diagram showing the optical lens according to Embodiment 8 of the present application;

[0051] Figure 9 It is a schematic structural diagram showing the optical lens according to Embodiment 9 of the present application;

[0052] Figure 10 To show the schematic structural diagram of the optical lens according to Embodiment 10 of the present application;

[0053] Figure 11 To show the schematic structural diagram of the optical lens according to Embodiment 11 of the present application;

[0054] Figure 12 To show the schematic structural diagram of the optical lens according to Embodiment 12 of the present application;

[0055] Figure 13 To show the schematic structural diagram of the optical lens according to Embodiment 13 of the present application;

[0056] Figure 14 To show the schematic structural diagram of the optical lens according to Embodiment 14 of the present application;

[0057] Figures 15 to 32 Respectively to show the schematic structural diagrams of the optical lenses according to Embodiments 15 to 32 of the present application;

[0058] Figure 33 To show the schematic diagram of the maximum light-passing aperture D, half aperture D / 2, and edge opening angle arctan(1 / K(S1)) of the first side of the first lens in the optical lens according to the exemplary embodiment of the present application; and Figures 34 to 65 Respectively to show the curve graphs of the angular resolutions of the optical lenses according to Embodiments 1 to 32 of the present application. Detailed Embodiments

[0059] To facilitate the understanding of the present application, the present application will be described more comprehensively below with reference to the relevant drawings. It should be understood that these detailed descriptions are only descriptions of the exemplary embodiments of the present application and do not limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0060] It should be noted that in this specification, the expressions such as first, second, and third are only used to distinguish one feature from another feature and do not represent any limitation on the feature. Therefore, without departing from the teachings of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0061] In the drawings, for the sake of convenience of illustration, the thickness, size, and shape of the lens have been slightly exaggerated. Specifically, the spherical or aspherical shapes shown in the drawings are shown by way of example. That is, the spherical or aspherical shapes are not limited to the spherical or aspherical shapes shown in the drawings. The drawings are only for illustration and are not drawn strictly to scale.

[0062] In this text, 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 object being photographed is called the object side surface of the lens, and the surface of each lens closest to the imaging side is called the image side surface of the lens.

[0063] It should be understood that the optical lens provided in this application can be used for both photography and projection. When the optical lens provided in this application is used as a camera lens, the "first side" mentioned in this text can refer to the object side, and the "second side" can refer to the image side; when the optical lens provided in this application is used as a projection lens or a radar emission lens, the "first side" mentioned in this text can refer to the imaging side, and the "second side" can refer to the image source side.

[0064] It should also be understood that the terms "comprising", "including", "having", "containing" and / or "including with", 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 an expression such as "at least one of..." appears after the list of listed features, it modifies the entire list of listed features, rather than an individual element in the list. In addition, when describing the embodiments of this application, the use of "may" indicates "one or more embodiments of this application". And the term "exemplary" is intended to refer to an example or illustration.

[0065] Unless otherwise defined, all terms used in this text (including technical and scientific terms) have the same meaning as the ordinary understanding of those of ordinary skill in the art to which this application belongs. It should also be understood that terms (such as those defined in a common dictionary) should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and will not be interpreted in an idealized or overly formalized sense unless expressly so defined in this text.

[0066] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The following will detail this application with reference to the drawings and in combination with the embodiments.

[0067] The features, principles and other aspects of this application are described in detail below.

[0068] In an exemplary embodiment, an optical lens includes, for example, a first lens group, a second lens group, and a third lens group arranged in sequence along an optical axis from a first side to a second side, where the first lens group includes at least a first lens closest to the first side and having a focal power; the second lens group includes at least three lenses having a focal power; and the third lens group includes a last lens closest to the second side and having a focal power.

[0069] In an exemplary embodiment, a paraxial region of a first side surface of the first lens included in the first lens group may be convex.

[0070] In an exemplary embodiment, an angular resolution value of the optical lens gradually decreases as a field angle of the optical lens gradually increases from a center to an edge, that is, at a center position of the field angle of the optical lens, the optical lens has a maximum angular resolution value, and at a farthest edge position from the center of the field angle of the optical lens, the optical lens has a minimum angular resolution value.

[0071] In an exemplary embodiment, the first lens group may further include a second lens having a negative focal power, a first side surface of which may be convex and a second side surface of which may be concave. The second lens is located on a second side of the first lens.

[0072] In an exemplary embodiment, the second lens group may further include at least one cemented lens, and a first side surface of the cemented lens may be convex.

[0073] In an exemplary embodiment, a first side surface of the last lens included in the third lens group may be convex.

[0074] In an exemplary embodiment, the optical lens according to the present application may satisfy: arctan(1 / K(S1)) / G 1-θ2 ≤0.4, where arctan(1 / K(S1)) is an edge subtended angle of the first side surface of the first lens at a maximum field angle of the optical lens, and G 1-θ2 is a subtended angle at a half-aperture (D / 2) of the first side surface of the first lens, as shown in the appendix Figure 15 . By controlling a ratio of the edge subtended angle of the first side surface of the first lens at the maximum field angle of the optical lens to the subtended angle at the half-aperture (D / 2) of the first side surface of the first lens within this range, and controlling the center of the first side surface of the first lens to be convex with a relatively small edge subtended angle, it is beneficial to special distortion and achieves a large angular resolution at the center. In an exemplary embodiment, when the edge subtended angle and the center subtended angle are both positive or both negative, the edge curvature and the center curvature are in the same direction; when the edge subtended angle and the center subtended angle have opposite signs, there is an inflection. In an exemplary embodiment, arctan(1 / K(S1)) / G 1-θ2For example, it can be equal to values such as -0.9, -0.6, -0.4, -0.1, 0.2, 0.3, and 0.4.

[0075] More specifically, arctan(1 / K(S1)) and G 1-θ2 Further, it can satisfy: arctan(1 / K(S1)) / G 1-θ2 ≤0.3. By controlling the ratio of the marginal angle of the first side of the first lens at the maximum field of view angle of the optical lens to the angle at the half-aperture (D / 2) of the first side of the first lens within this range, it is more beneficial for special distortion and better realizes the large-angle resolution at the center.

[0076] In an exemplary embodiment, the optical lens according to the present application can satisfy: PPDmax / PPDmin≥3, where PPDmax is the angular resolution corresponding to the central field of view of the optical lens, that is, the angular resolution of the optical lens corresponding to the center of the maximum field of view angle of the optical lens; PPDmin is the angular resolution corresponding to the marginal field of view of the optical lens, that is, the angular resolution of the optical lens corresponding to at least one place of the maximum field of view angle of the optical lens. By controlling the ratio of the angular resolution corresponding to the central field of view of the optical lens to the angular resolution corresponding to the marginal field of view of the optical lens within this range, it is beneficial to achieve both long focal length and large field of view of the lens. In an exemplary embodiment, PPDmax / PPDmin can be equal to values such as 3, 5, 10, 20, 25, 35, 45, 50, 60, 70, and 80, for example.

[0077] More specifically, PPDmax and PPDmin can further satisfy: 3.5≤PPDmax / PPDmin≤12. By controlling the angular resolution corresponding to the central field of view of the optical lens and the angular resolution corresponding to the marginal field of view of the optical lens to satisfy 3.5≤PPDmax / PPDmin≤12, it can better achieve both long focal length and large field of view of the lens. Exemplarily, PPDmax and PPDmin can further satisfy: 3.5≤PPDmax / PPDmin≤80.

[0078] In an exemplary embodiment, the optical lens according to the present application can satisfy: H (θ / 10) / (H / 2)≥0.22, where H (θ / 10) is the half image height corresponding to one-tenth of the maximum field of view angle of the optical lens, and H is the image height corresponding to the maximum field of view angle of the optical lens. By controlling the half image height corresponding to one-tenth of the maximum field of view angle of the optical lens and the image height corresponding to the maximum field of view angle of the optical lens to satisfy the conditional formula H (θ / 10) / (H / 2)≥0.22, when the full image height is constant, the larger the proportion of the image height in the small-angle region, the larger the central angular resolution. In an exemplary embodiment, H (θ / 10) / (H / 2) can be equal to values such as 0.22, 0.3, 0.35, 0.4, and 0.45, for example.

[0079] More specifically, H (θ / 10) and H can further satisfy: H (θ / 10) / (H / 2) ≥ 0.25. By controlling the semi-image height corresponding to one-tenth of the maximum field of view angle of the optical lens and the image height corresponding to the maximum field of view angle of the optical lens to satisfy the conditional formula H (θ / 10) / (H / 2) ≥ 0.25, the lens can further achieve the characteristic of a large central angle resolution. H (θ / 10) and H can further satisfy: 0.28 ≤ H (θ / 10) / (H / 2) ≤ 0.45.

[0080] In an exemplary embodiment, the maximum field of view angle FOV of the optical lens can be the maximum field of view angle corresponding to the photosensitive chip of the optical lens. Specifically, FOV can be the maximum value of the vertical field of view angle VFOV and the horizontal field of view angle HFOV (FOV = MAX(VFOV, HFOV)).

[0081] In an exemplary embodiment, the optical lens according to the present application can satisfy: R3 / F ≥ 0.2, where R3 is the radius of curvature of the first side of the second lens, and F is the total effective focal length of the optical lens. Reasonably controlling the ratio of the radius of curvature of the first side of the second lens to the total effective focal length of the optical lens within this range, with the first side of the second lens being convex, is beneficial for the convergence of the light path. To achieve a light path that fills the aperture of the diaphragm, it is necessary to increase the entrance pupil diameter, and correspondingly F also becomes larger, which is beneficial for achieving a long focal length; a larger R3 value can make the lens shape smoother and reduce sensitivity. In an exemplary embodiment, R3 / F can be equal to values such as 0.2, 0.5, 1, 2, 5, 8, 10, 12, and 15, for example.

[0082] More specifically, R3 and F can further satisfy: 0.3 ≤ R3 / F ≤ 15. By controlling the ratio of the radius of curvature of the first side of the second lens to the total effective focal length of the optical lens within this range, it is more beneficial for achieving a long focal length; and it can further reduce the sensitivity of the second lens. R3 and F can further satisfy: 0.3 ≤ R3 / F ≤ 1.

[0083] In an exemplary embodiment, the optical lens according to the present application can satisfy: arctan(1 / K(S1)) ≤ 10°, where arctan(1 / K(S1)) is the edge opening angle of the first side of the first lens at the maximum field of view angle of the optical lens, as shown in the appendix Figure 15As shown. By controlling the edge opening angle of the first side surface of the first lens at the maximum field of view angle of the optical lens within this range, the edge opening angle of the first side surface (object surface) of the first lens is relatively small, which is beneficial to collecting light rays in the edge field of view. Moreover, the first side surface of the first lens is an aspherical surface, and the center of this surface is convex with a relatively small edge opening angle; it is easy to distinguish between light rays in the edge field of view and those in the central field of view. In the case of a large field of view angle, large distortion is introduced through the edge, and high resolution at a large central angle can be achieved. In an exemplary embodiment, arctan(1 / K(S1)) can be equal to, for example, -15°, -10°, -5°, -2°, 3°, 5°, 8°, and 10°, etc.

[0084] More specifically, arctan(1 / K(S1)) can further satisfy: arctan(1 / K(S1)) ≤ 5°. By controlling the edge opening angle of the first side surface of the first lens at the maximum field of view angle of the optical lens within this range, it is more beneficial to collect light rays in the edge field of view; and it is easier to distinguish between light rays in the edge field of view and those in the central field of view. In the case of a large field of view angle, large distortion is introduced through the edge, and high resolution at a large central angle can be better achieved. arctan(1 / K(S1)) can also further satisfy: -15° ≤ arctan(1 / K(S1)) ≤ 3.5°.

[0085] In an exemplary embodiment, the optical lens according to the present application can satisfy: arctan(SAG1 / (D / 2)) ≤ 25°, where SAG1 is the sagitta corresponding to the first side surface of the first lens at the maximum field of view angle of the optical lens, and D is the maximum effective clear aperture corresponding to the first side surface of the first lens at the maximum field of view angle of the optical lens. By controlling the sagitta corresponding to the first side surface of the first lens at the maximum field of view angle of the optical lens and the maximum effective clear aperture corresponding to the first side surface of the first lens at the maximum field of view angle of the optical lens to satisfy the conditional formula arctan(SAG1 / (D / 2)) ≤ 25°, the ratio of the sagitta to the aperture is relatively small. In the case of a large field of view angle, the first side surface of the first lens is an aspherical surface, and the center of this surface is convex with a relatively small edge opening angle; a relatively small edge opening angle is beneficial to collecting light rays in the edge field of view, reducing the height of the light rays in the edge field of view incident on the image plane, and high resolution at a large central angle can be achieved. In an exemplary embodiment, arctan(SAG1 / (D / 2)) can be equal to, for example, 2°, 5°, 8°, 10°, 13°, 17°, 20°, 22°, and 25°, etc.

[0086] More specifically, SAG1 and D can further satisfy: arctan(SAG1 / (D / 2)) ≤ 20°. By controlling the sagitta corresponding to the first side surface of the first lens at the maximum field of view angle of the optical lens and the maximum effective aperture diameter corresponding to the first side surface of the first lens at the maximum field of view angle of the optical lens to satisfy the conditional formula arctan(SAG1 / (D / 2)) ≤ 20°, it is more conducive to collecting peripheral field light, reducing the height of peripheral field light incident on the image plane, and better achieving large angular resolution at the center. SAG1 and D can further satisfy: 2° ≤ arctan(SAG1 / (D / 2)) ≤ 15°.

[0087] In an exemplary embodiment, the optical lens according to the present application can satisfy: R1 / F ≥ 0.5, where R1 is the radius of curvature of the first side surface of the first lens, and F is the total effective focal length of the optical lens. By controlling the ratio of the radius of curvature of the first side surface of the first lens to the total effective focal length of the optical lens within this range, the first side surface (object side surface) of the first lens is designed as a convex surface, and the value of R1 is relatively large, so that the shape change from the center to the periphery of the aspherical surface is gentle, reducing the aberration change after decentration of the object side surface, and effectively reducing the sensitivity of the first lens; at the same time, the object side surface of the first lens is designed as a convex surface, which is also conducive to collecting large-angle light into the lens, reducing the front aperture diameter, and achieving a small aperture. In an exemplary embodiment, R1 / F can be equal to values such as 0.5, 1, 1.2, 1.6, 2, 2.5, 3, 3.5, 4.5, and 5, etc.

[0088] More specifically, R1 and F can further satisfy: R1 / F ≥ 1. By controlling the ratio of the radius of curvature of the first side surface of the first lens to the total effective focal length of the optical lens within this range, the sensitivity of the first lens can be further reduced; at the same time, it is more conducive to collecting large-angle light into the lens, reducing the front aperture diameter, and better achieving a small aperture. R1 and F can further satisfy: 1.2 ≤ R1 / F ≤ 5.

[0089] In an exemplary embodiment, the optical lens according to the present application can satisfy: arctan(SAG4 / (D4 / 2))≥10°, where SAG4 is the sagitta corresponding to the second side surface of the second lens at the maximum field of view angle of the optical lens, and D4 is the maximum effective clear aperture corresponding to the second side surface of the second lens at the maximum field of view angle of the optical lens. By controlling the sagitta corresponding to the second side surface of the second lens at the maximum field of view angle of the optical lens and the maximum effective clear aperture corresponding to the second side surface of the second lens at the maximum field of view angle of the optical lens to satisfy the conditional formula arctan(SAG4 / (D4 / 2))≥10°, the included angle of the second side surface (image side surface) of the second lens is relatively large, which is beneficial to reducing the outgoing angle of peripheral light at large angles, enabling the light to transition smoothly, entering the third lens, and achieving high resolution. In an exemplary embodiment, arctan(SAG4 / (D4 / 2)) can be equal to, for example, numerical values such as 10°, 13°, 16°, 20°, 25°, 30°, and 35°.

[0090] More specifically, SAG4 and D4 can further satisfy: 13°≤arctan(SAG4 / (D4 / 2))≤35°. By controlling the sagitta corresponding to the second side surface of the second lens at the maximum field of view angle of the optical lens and the maximum effective clear aperture corresponding to the second side surface of the second lens at the maximum field of view angle of the optical lens to satisfy the conditional formula 13°≤arctan(SAG4 / (D4 / 2))≤35°, it is more beneficial to reduce the outgoing angle of peripheral light at large angles, enabling the light to transition smoothly, entering the third lens, and better achieving high resolution.

[0091] In an exemplary embodiment, the optical lens according to the present application can satisfy: 0.6≤d1 / d1e≤1.4, where d1 is the central thickness of the first lens on the optical axis, and d1e is the edge thickness of the first lens at the maximum effective clear aperture corresponding to the maximum field of view angle of the optical lens. By controlling the ratio of the central thickness of the first lens on the optical axis to the edge thickness of the first lens at the maximum effective clear aperture corresponding to the maximum field of view angle of the optical lens within this range, the maximum and minimum axial thicknesses within the clear aperture of the first lens are close, controlling the thickness uniformity of the first lens, and high-resolution and low-sensitivity can be achieved.

[0092] More specifically, d1 and d1e can further satisfy: 0.7≤d1 / d1e≤1.25. By controlling the ratio of the central thickness of the first lens on the optical axis to the edge thickness of the first lens at the maximum effective clear aperture corresponding to the maximum field of view angle of the optical lens within this range, the maximum and minimum axial thicknesses within the clear aperture of the first lens are closer, better controlling the thickness uniformity of the first lens, and high-resolution and low-sensitivity can be further achieved.

[0093] In an exemplary embodiment, the optical lens according to the present application may satisfy: |RL / F| ≥ 0.6, where RL is the radius of curvature of the second side of the last lens (i.e., the seventh lens) of the optical lens, and F is the total effective focal length of the optical lens. By controlling the absolute value of the ratio of the radius of curvature of the second side of the last lens of the optical lens to the total effective focal length of the optical lens within this range, it is beneficial to correct aberrations and achieve high resolution. In an exemplary embodiment, |RL / F| may be equal to values such as 0.6, 0.8, 1, 1.5, 2.0, 2.5, and 3, etc.

[0094] More specifically, RL and F may further satisfy: |RL / F| ≥ 1. By controlling the absolute value of the ratio of the radius of curvature of the second side of the last lens of the optical lens to the total effective focal length of the optical lens within this range, aberrations can be better corrected, and high resolution can be further achieved.

[0095] In an exemplary embodiment, the optical lens according to the present application may satisfy: arctan(1 / K(S13)) - arctan(1 / K(S14)) ≥ 20°, where arctan(1 / K(S13)) is the marginal angular spread of the first side of the seventh lens at the maximum field of view angle of the optical lens, and arctan(1 / K(S14)) is the marginal angular spread of the second side of the seventh lens at the maximum field of view angle of the optical lens. By controlling the difference between the marginal angular spread of the first side of the seventh lens at the maximum field of view angle of the optical lens and the marginal angular spread of the second side of the seventh lens at the maximum field of view angle of the optical lens within this range, the shape of the seventh lens is controlled. There are obvious curvatures at both the object side and the image side edges of the seventh lens, the marginal angular spreads on both sides are relatively large, and the sum of the marginal angular spreads on both sides is controlled within a certain range. Larger aberrations are introduced in the peripheral field of view, which can improve the central angular resolution and correct the field curvature to achieve high resolution. In an exemplary embodiment, arctan(1 / K(S13)) - arctan(1 / K(S14)) may be equal to values such as 20°, 25°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, and 75°, etc.

[0096] More specifically, arctan(1 / K(S13)) and arctan(1 / K(S14)) further satisfy: 25° ≤ arctan(1 / K(S13)) - arctan(1 / K(S14)) ≤ 75°. By controlling the difference between the marginal angular spread of the first side surface of the seventh lens at the maximum field of view angle of the optical lens and the marginal angular spread of the second side surface of the seventh lens at the maximum field of view angle of the optical lens within this range, the central angular resolution can be further improved, and at the same time, the field curvature can be better corrected to achieve high resolution. Arctan(1 / K(S13)) and arctan(1 / K(S14)) can further satisfy: 25° ≤ arctan(1 / K(S13)) - arctan(1 / K(S14)) ≤ 65°.

[0097] In an exemplary embodiment, the optical lens according to the present application satisfies: |F1 / F| ≥ 2, where F1 is the effective focal length of the first lens and F is the total effective focal length of the optical lens. By controlling the absolute value of the ratio of the effective focal length of the first lens to the total effective focal length of the optical lens within this range, a relatively large focal length of the first lens can be achieved, thereby increasing the focal length of the entire lens. In an exemplary embodiment, |F1 / F| can be equal to values such as 100, 80, 60, 45, 30, 15, 7, and 3.

[0098] More specifically, F1 and F further satisfy: 2.5 ≤ |F1 / F| ≤ 100. By controlling the absolute value of the ratio of the effective focal length of the first lens to the total effective focal length of the optical lens within this range, a relatively large focal length of the first lens can be further achieved, thereby better increasing the focal length of the entire lens.

[0099] In an exemplary embodiment, the optical lens according to the present application satisfies: R3 / R4 ≥ 0.8, where R3 is the radius of curvature of the first side surface of the second lens and R4 is the radius of curvature of the second side surface of the second lens. By 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 this range, the center of the first side surface (object side surface) of the second lens is convex, having the same bending direction as the first lens. Cooperating with the first lens, it can finely control the light path of each field of view, which helps to meet the requirements of special distortion and is beneficial to achieving a large angular resolution at the center; enabling the lens to have a long focal length and a large field of view, and being able to resolve more detailed information. In an exemplary embodiment, R3 / R4 can be equal to values such as 0.8, 1.0, 1.2, 2, 2.5, 3.5, 4, 4.5, and 5.

[0100] More specifically, R3 and R4 can further satisfy: R3 / R4 ≥ 1.2. By 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 this range, the requirements for special distortion can be better achieved, which is more conducive to achieving a large angular resolution at the center; and it can further enable the lens to have a long focal length and a large field of view, and more detailed information can be resolved. R3 and R4 can further satisfy: 1.2 ≤ R3 / R4 ≤ 5.

[0101] In an exemplary embodiment, the optical lens according to the present application can satisfy: dL / TTL ≥ 0.07, where dL is the central thickness of the last lens (i.e., the seventh lens) of the optical lens on the optical axis, and TTL is the distance from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis. By controlling the ratio of the central thickness of the last lens of the optical lens on the optical axis to the distance from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis within this range, the central thickness of the last lens is relatively large, which is beneficial to enhancing the ability to control light and achieving a large angular resolution. In the exemplary embodiment, the value of dL / TTL can be equal to, for example, 0.07, 0.09, 0.1, 0.2, 0.4, 0.6, and 0.7.

[0102] More specifically, dL and TTL can further satisfy: dL / TTL ≥ 0.09. Exemplarily, dL and TTL can further satisfy: 0.1 ≤ dL / TTL ≤ 0.8. By controlling the ratio of the central thickness of the last lens of the optical lens on the optical axis to the distance from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis within this range, it is more conducive to enhancing the ability to control light and better achieving a large angular resolution.

[0103] In an exemplary embodiment, the optical lens according to the present application can satisfy: |FL / F| ≥ 1.5, where FL is the effective focal length of the last lens (i.e., the seventh lens) of the optical lens, and F is the total effective focal length of the optical lens. By controlling the effective focal length of the last lens of the optical lens to satisfy the conditional formula |FL / F| ≥ 1.5, the focal length of the last lens is relatively large, which is beneficial to the smooth transition of light and achieving a large angular resolution; and with a relatively large focal length, the deflection angle of light convergence or divergence is small, and the exit angle of the image-side light can be controlled within a certain range, which is beneficial to achieving a small CRA; the exit angle of the image-side light is controlled within a certain range, which is beneficial to correcting lens aberrations, reducing lens sensitivity, and can correct the chromatic aberration of the light lens, which is beneficial to improving the imaging quality of the lens. In the exemplary embodiment, the value of |FL / F| can be equal to, for example, 1.5, 3, 7, 10, 15, 20, 28, 35, and 40.

[0104] More specifically, FL and F can further satisfy: |FL / F| ≥ 2. By controlling the effective focal length of the last lens of the optical lens and the total effective focal length of the optical lens to satisfy the conditional formula |FL / F| ≥ 2, the light can be made to transition more smoothly, better achieving large angular resolution; and can better achieve a small CRA; and can better correct lens aberrations, reduce lens sensitivity, and can better correct the chromatic aberration of the light lens, further improving the imaging quality of the lens. Exemplarily, FL and F can further satisfy: 2.5 ≤ |FL / F| ≤ 40.

[0105] In an exemplary embodiment, the optical lens according to the present application can satisfy: arctan(1 / K(S3)) / G 2-θ2 ≤ 0.95, where arctan(1 / K(S3)) is the marginal angular spread of the first side of the second lens at the maximum field of view angle of the optical lens, and G 2-θ2 is the angular spread at the half-aperture (D / 2) of the first side of the second lens. By controlling the ratio of the marginal angular spread of the first side of the second lens at the maximum field of view angle of the optical lens to the angular spread at the half-aperture of the first side of the second lens within this range, and controlling the center of the first side of the second lens to be convex with a smaller angular spread at the edge, it is beneficial for special distortion and achieving large angular resolution at the center. In an exemplary embodiment, arctan(1 / K(S3)) / G 2-θ2 can be equal to numerical values such as -0.5, -0.2, 0.1, 0.3, 0.5, 0.7, and 0.9, for example.

[0106] More specifically, arctan(1 / K(S3)) and G 2-θ2 can further satisfy: arctan(1 / K(S3)) / G 2-θ2 ≤ 0.9. By controlling the ratio of the marginal angular spread of the first side of the second lens at the maximum field of view angle of the optical lens to the angular spread at the half-aperture of the first side of the second lens within this range, it can be more beneficial for special distortion and better achieve large angular resolution at the center.

[0107] In an exemplary embodiment, the optical lens may further include, for example, a diaphragm disposed between the third lens and the fourth lens. Disposing the diaphragm between the third lens and the fourth lens can reasonably distribute the light heights of the front and rear groups, shorten the total length of the optical system, and reduce the apertures of the front and rear lens groups. However, it should be noted that the position of the diaphragm disclosed herein is only an example and not a limitation; in alternative embodiments, the diaphragm can also be disposed at other positions according to actual needs.

[0108] In an exemplary embodiment, the use of cemented lenses in an optical lens can correct chromatic aberration by leaving residual higher-order chromatic aberration to balance the chromatic aberration of the system. In addition, the use of cemented lenses can also make the overall structure of the optical system compact, meet the requirements of miniaturization, and at the same time reduce the sensitivity of lens units to tolerances such as tilt / eccentricity generated during the assembly process. In an exemplary embodiment, the cemented lens can be composed of a positive lens and a negative lens respectively. The positive lens can have a lower refractive index, and the negative lens can have a higher refractive index relative to the positive lens. The combination of high and low refractive indices is conducive to the rapid transition of light rays in front, increasing the aperture and improving the light transmission.

[0109] In an exemplary embodiment, the optical lens may further include a photosensitive element disposed on the imaging surface. Optionally, the photosensitive element disposed on the imaging surface may be a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor element (CMOS).

[0110] In an exemplary embodiment, as needed, the optical lens of the present application may further include a filter and / or a protective glass disposed between the last lens and the imaging surface. The filter can filter light rays with specific wavelengths, and the protective glass can prevent the second-side elements (e.g., chips) of the optical lens from being damaged.

[0111] In an exemplary embodiment, at least some of the lenses in the optical lens can be aspherical lenses. The present application does not specifically limit the specific numbers of spherical lenses and aspherical lenses. When focusing on the resolution quality, the number of aspherical lenses can be increased. In particular, in order to improve the resolution quality of the optical system, each lens included in the optical lens can be an aspherical lens. The characteristic of an aspherical lens is that the curvature continuously changes from the center to the periphery of the lens. Different from a spherical lens with a constant curvature from the center to the periphery, an aspherical lens has better curvature radius characteristics and has the advantages of improving distortion aberration and astigmatism aberration. After using an aspherical lens, it is possible to eliminate as much aberration as possible during imaging, thereby improving the imaging quality of the lens. The setting of aspherical lenses helps to correct system aberration and improve the resolution.

[0112] In an exemplary embodiment, each lens included in the optical lens may be a glass lens. The optical lens made of glass can suppress the shift of the back focal length of the optical lens with temperature changes, so as to improve the system stability. At the same time, using glass material can avoid problems such as blurred imaging of the lens and affecting the normal use of the lens caused by high and low temperature changes in the use environment. Specifically, when focusing on temperature performance and resolution quality, each lens included in the optical lens may be a glass aspherical lens. In application scenarios with lower requirements for temperature stability, each lens in the optical lens may also be made of plastic. Making the optical lens with plastic can effectively reduce the manufacturing cost. Of course, multiple lenses included in the optical lens may also be made of a combination of plastic and glass.

[0113] According to the optical lens of the above embodiment of the present application, by reasonably setting parameters such as the shape and optical power of each lens, the optical lens can have at least one of the beneficial effects such as long focal length, large field of view, high resolution, miniaturization, large aperture, and high central angular resolution, so that the optical lens can better meet the requirements of the continuous development of in-vehicle applications.

[0114] However, those skilled in the art should understand that without departing from the technical solutions claimed in the present application, the number of lenses constituting the lens can be changed to obtain the various results and advantages described in this specification. The following further describes specific embodiments of the optical lens applicable to the above embodiments with reference to the drawings.

[0115] Example 1

[0116] The following refers to Figure 1 Describe the optical lens according to Embodiment 1 of the present application. Figure 1 The structural schematic diagram of the optical lens according to Embodiment 1 of the present application is shown.

[0117] As Figure 1 shown, the optical lens sequentially includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7 along the optical axis from the first side to the second side.

[0118] The first lens L1 is a convex-concave lens with a negative optical power. Its first side S1 is a convex surface, and its second side S2 is a concave surface. The second lens L2 is a convex-concave lens with a negative optical power. Its first side S3 is a convex surface, and its second side S4 is a concave surface. The third lens L3 is a concave-convex lens with a positive optical power. Its first side S5 is a concave surface, and its second side S6 is a convex surface. The fourth lens L4 is a convex-convex lens with a positive optical power. Its first side S8 is a convex surface, and its second side S9 is a convex surface. The fifth lens L5 is a convex-concave lens with a negative optical power. Its first side S10 is a convex surface, and its second side S11 is a concave surface. The sixth lens L6 is a convex-convex lens with a positive optical power. Its first side S11 is a convex surface, and its second side S12 is a convex surface. The seventh lens L7 is a convex-concave lens with a positive optical power. Its first side S13 is a convex surface, and its second side S14 is a concave surface. Among them, the fifth lens L5 and the sixth lens L6 are cemented to form a doublet lens; the second side S14 of the seventh lens L7 has an inflection point.

[0119] The optical lens further includes a stop STO disposed between the third lens L3 and the fourth lens L4, which is beneficial to reasonably distribute the heights of the front and rear group of light rays, shorten the total length of the optical system, and reduce the apertures of the front and rear lens groups. For example, the stop STO can be disposed at a position between the third lens L3 and the fourth lens L4 close to the first side S8 of the fourth lens L4.

[0120] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the seventh lens L7 and the imaging surface (IMA). The filter has, for example, a first side S15 and a second side S16, and the protective glass has, for example, a first side S17 and a second side S18.

[0121] When the optical lens is used for imaging, the light from the object sequentially passes through the surfaces S1 to S18 and finally forms an image on the imaging surface; when the optical lens is used for projection, the light from the image source surface sequentially passes through the surfaces S18 to S1 and finally projects onto the target object (not shown).

[0122] Table 1 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens of the optical lens in Embodiment 1. Among them, regarding "thickness / distance", it should be understood that the thickness / distance in the row where S1 is located is the central thickness of the first lens L1, the thickness / distance in the row where S2 is located is the air spacing distance between the first lens L1 and the second lens L2, the thickness / distance in the row where S3 is located is the central thickness of the second lens L2, the thickness / distance in the row where S4 is located is the air spacing distance between the second lens L2 and the third lens L3, and so on.

[0123]

[0124]

[0125] Table 1

[0126] In Embodiment 1, the first sides and the second sides S1 - S6, S13, S14 of the first lens L1, the second lens L2, the third lens L3, and the seventh lens L7 can all be aspherical surfaces. The surface profile x of the aspherical lens can be defined by, but not limited to, the following aspherical formula:

[0127]

[0128] Where x is the sagitta, the distance from the vertex of the aspherical surface at the position with height h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; Ai is the correction coefficient of the i-th order of the aspherical surface. Table 2 below gives the conic coefficient k and the higher-order term coefficients A4, A6, A8, A10, A12, A14, and A16 that can be used for the aspherical surfaces S1 - S6, S13, S14 in Embodiment 1.

[0129] Surface number k A4 A6 A8 A10 A12 A14 A16 S1 2.6429 2.0199E-03 -1.4221E-04 2.0228E-06 -5.1872E-08 2.7011E-09 -4.2235E-11 1.5349E-13 S2 -99.0000 7.4690E-03 -6.4390E-04 8.7630E-06 8.5100E-07 -4.0300E-08 7.2146E-10 -4.4929E-12 S3 -13.1520 7.3640E-03 -1.5416E-03 1.6931E-04 -1.4507E-05 9.3769E-07 -3.8318E-08 7.192E-10 S4 -4.8643 1.6836E-02 -5.2182E-03 1.1888E-03 -1.9202E-04 2.0521E-05 -1.2478E-06 3.1185E-08 S5 2.7682 -8.8963E-04 -9.2129E-05 6.9958E-05 -2.8604E-05 5.8179E-06 -5.8094E-07 2.2159E-08 S6 1.2658 0.00029345 -0.000016569 8.6816E-06 -1.6821E-06 1.8569E-07 -1.0661E-08 2.4882E-10 S13 1.9249 0.00029495 -0.000013176 1.6822E-06 -1.2732E-07 4.8166E-09 -9.2263E-11 6.1995E-13 S14 -58.543 -0.00016964 -0.00025765 0.000016167 -4.5066E-07 5.859E-09 -2.7783E-11 -9.7557E-15

[0130] Table 2

[0131] Figure 34 Shows the angular resolution curve of the optical lens according to Embodiment 1 of the present application. Where the abscissa represents the field angle of the optical lens increasing from 0° to the maximum semi-field angle of 50°, and the ordinate represents the central resolution value of the angular resolution curve of the optical lens. From Figure 34 It can be seen that the central resolution value of the angular resolution curve of the optical lens gradually decreases as the field angle of the optical lens increases.

[0132] Example 2

[0133] The following refers to Figure 2 Describe the optical lens according to Embodiment 2 of the present application. In this embodiment and the following embodiments, for the sake of simplicity, some descriptions similar to those in Embodiment 1 will be omitted. Figure 2 Shows a schematic structural diagram of the optical lens according to Embodiment 2 of the present application.

[0134] As Figure 2 shown, the optical lens sequentially includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7 along the optical axis from the first side to the second side.

[0135] The first lens L1 is a convex-concave lens with a negative focal power, its first side S1 is a convex surface, and its second side S2 is a concave surface. The second lens L2 is a convex-concave lens with a negative focal power, its first side S3 is a convex surface, and its second side S4 is a concave surface. The third lens L3 is a concave-convex lens with a positive focal power, its first side S5 is a concave surface, and its second side S6 is a convex surface. The fourth lens L4 is a convex-convex lens with a positive focal power, its first side S8 is a convex surface, and its second side S9 is a convex surface. The fifth lens L5 is a convex-concave lens with a negative focal power, its first side S10 is a convex surface, and its second side S11 is a concave surface. The sixth lens L6 is a convex-convex lens with a positive focal power, its first side S11 is a convex surface, and its second side S12 is a convex surface. The seventh lens L7 is a convex-concave lens with a positive focal power, its first side S13 is a convex surface, and its second side S14 is a concave surface. Among them, the fifth lens L5 and the sixth lens L6 are cemented to form a doublet lens; the first side S1 of the first lens L1 and the second side S14 of the seventh lens L7 have an inflection point.

[0136] The optical lens further includes a stop STO disposed between the third lens L3 and the fourth lens L4, which is beneficial to reasonably distribute the ray heights of the front and rear groups, shorten the total length of the optical system, and reduce the apertures of the front and rear lens groups. For example, the stop STO can be disposed at a position between the third lens L3 and the fourth lens L4 close to the first side S8 of the fourth lens L4.

[0137] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the seventh lens L7 and the imaging surface (IMA). The filter has, for example, a first side S15 and a second side S16, and the protective glass has, for example, a first side S17 and a second side S18.

[0138] When the optical lens is used for imaging, the light from the object sequentially passes through the surfaces S1 to S18 and finally forms an image on the imaging surface; when the optical lens is used for projection, the light from the image source surface sequentially passes through the surfaces S18 to S1 and is finally projected onto the target object (not shown).

[0139] Table 3 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens of the optical lens of Embodiment 2. In this embodiment, the first sides and the second sides S1-S6, S13, S14 of the first lens L1, the second lens L2, the third lens L3, and the seventh lens L7 are all aspherical surfaces. Table 4 shows the conic coefficient and the high-order term coefficient that can be used for each aspherical mirror surface in this embodiment. Among them, each aspherical surface type can be defined by the formula (1) given in the above Embodiment 1.

[0140]

[0141]

[0142] Table 3

[0143] Surface number k A4 A6 A8 A10 A12 A14 A16 S1 2.6429 2.0607E-03 -1.4509E-04 2.0636E-06 -5.2920E-08 2.7557E-09 -4.3088E-11 1.5659E-13 S2 -99.0000 7.4690E-03 -6.4390E-04 8.7630E-06 8.5100E-07 -4.0300E-08 7.2146E-10 -4.4929E-12 S3 -13.1520 7.5127E-03 -1.5728E-03 1.7273E-04 -1.4800E-05 9.5663E-07 -3.9092E-08 7.3373E-10 S4 -4.8643 1.6836E-02 -5.2182E-03 1.1888E-03 -1.9202E-04 2.0521E-05 -1.2478E-06 3.1185E-08 S5 2.7682 -8.9852E-04 -9.3050E-05 7.0658E-05 -2.8890E-05 5.8761E-06 -5.8675E-07 2.238E-08 S6 1.2658 0.00029345 -0.000016569 8.6816E-06 -1.6821E-06 1.8569E-07 -1.0661E-08 2.4882E-10 S13 1.9249 0.00029789 -0.000013308 0.000001699 -1.2859E-07 4.8648E-09 -9.3186E-11 6.2615E-13 S14 -58.543 -0.00016964 -0.00025765 0.000016167 -4.5066E-07 5.859E-09 -2.7783E-11 -9.7557E-15

[0144] Table 4

[0145] Figure 35 shows the angular resolution curve of the optical lens according to Embodiment 2 of the present application. Among them, the abscissa represents the field angle of the optical lens increasing from 0° to the maximum semi-field angle of 50°, and the ordinate represents the central resolution value of the angular resolution curve of the optical lens. From Figure 35 it can be seen that the central resolution value of the angular resolution curve of the optical lens gradually decreases as the field angle of the optical lens increases.

[0146] Example 3

[0147] The following refers to Figure 3 to describe the optical lens according to Embodiment 3 of the present application. Figure 3 shows a schematic structural diagram of the optical lens according to Embodiment 3 of the present application.

[0148] As Figure 3 shown, the optical lens sequentially includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7 along the optical axis from the first side to the second side.

[0149] The first lens L1 is a convex-concave lens with a positive optical power, its first side S1 is a convex surface, and its second side S2 is a concave surface. The second lens L2 is a convex-concave lens with a negative optical power, its first side S3 is a convex surface, and its second side S4 is a concave surface. The third lens L3 is a concave-convex lens with a negative optical power, its first side S5 is a concave surface, and its second side S6 is a convex surface. The fourth lens L4 is a convex-convex lens with a positive optical power, its first side S8 is a convex surface, and its second side S9 is a convex surface. The fifth lens L5 is a convex-concave lens with a negative optical power, its first side S10 is a convex surface, and its second side S11 is a concave surface. The sixth lens L6 is a convex-convex lens with a positive optical power, its first side S11 is a convex surface, and its second side S12 is a convex surface. The seventh lens L7 is a convex-concave lens with a positive optical power, its first side S13 is a convex surface, and its second side S14 is a concave surface. Among them, the fifth lens L5 and the sixth lens L6 are cemented to form a doublet lens; the first side S1 of the first lens L1 and the second side S14 of the seventh lens L7 have an inflection point.

[0150] The optical lens further includes a stop STO disposed between the third lens L3 and the fourth lens L4, which is conducive to reasonably distributing the ray heights of the front and rear groups, shortening the total length of the optical system, and reducing the apertures of the front and rear lens groups. For example, the stop STO can be disposed at a position close to the first side surface S8 of the fourth lens L4 between the third lens L3 and the fourth lens L4.

[0151] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the seventh lens L7 and the imaging surface (IMA). The filter has, for example, a first side surface S15 and a second side surface S16, and the protective glass has, for example, a first side surface S17 and a second side surface S18.

[0152] When the optical lens is used for imaging, the light from the object sequentially passes through the surfaces S1 to S18 and finally forms an image on the imaging surface; when the optical lens is used for projection, the light from the image source surface sequentially passes through the surfaces S18 to S1 and is finally projected onto the target object (not shown).

[0153] Table 5 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens of the optical lens of Embodiment 3. In this embodiment, the first side surfaces and the second side surfaces S1-S6, S13, S14 of the first lens L1, the second lens L2, the third lens L3, and the seventh lens L7 are all aspherical surfaces. Table 6 shows the conic coefficient and the high-order term coefficient that can be used for each aspherical mirror surface in this embodiment. Among them, each aspherical surface type can be defined by the formula (1) given in Embodiment 1 above.

[0154]

[0155] Table 5

[0156]

[0157]

[0158] Table 6

[0159] Figure 36 shows the angular resolution curve of the optical lens according to Embodiment 3 of the present application. Among them, the abscissa represents the field angle of the optical lens increasing from 0° to the maximum half field angle of 60°, and the ordinate represents the central resolution value of the angular resolution curve of the optical lens. From Figure 36 it can be seen that the central resolution value of the angular resolution curve of the optical lens gradually decreases as the field angle of the optical lens increases.

[0160] Example 4

[0161] The following refers to Figure 4 to describe the optical lens according to Embodiment 4 of the present application. Figure 4The structural schematic diagram of an optical lens according to Embodiment 4 of the present application is shown.

[0162] As Figure 4 shown, the optical lens sequentially includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7 along the optical axis from the first side to the second side.

[0163] The first lens L1 is a convex-concave lens with a positive optical power, its first side S1 is a convex surface, and its second side S2 is a concave surface. The second lens L2 is a convex-concave lens with a negative optical power, its first side S3 is a convex surface, and its second side S4 is a concave surface. The third lens L3 is a concave-convex lens with a negative optical power, its first side S5 is a concave surface, and its second side S6 is a convex surface. The fourth lens L4 is a convex-convex lens with a positive optical power, its first side S8 is a convex surface, and its second side S9 is a convex surface. The fifth lens L5 is a convex-concave lens with a negative optical power, its first side S10 is a convex surface, and its second side S11 is a concave surface. The sixth lens L6 is a convex-convex lens with a positive optical power, its first side S11 is a convex surface, and its second side S12 is a convex surface. The seventh lens L7 is a convex-concave lens with a positive optical power, its first side S13 is a convex surface, and its second side S14 is a concave surface. Among them, the fifth lens L5 and the sixth lens L6 are cemented to form a doublet lens; the first side S1 of the first lens L1 and the second side S14 of the seventh lens L7 have an inflection point.

[0164] The optical lens further includes a stop STO disposed between the third lens L3 and the fourth lens L4, which is beneficial to reasonably distribute the heights of the front and rear group of light rays, shorten the total length of the optical system, and reduce the apertures of the front and rear lens groups. For example, the stop STO can be disposed at a position between the third lens L3 and the fourth lens L4 close to the first side S8 of the fourth lens L4.

[0165] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the seventh lens L7 and the imaging surface (IMA). The filter has a first side S15 and a second side S16, and the protective glass has a first side S17 and a second side S18, for example.

[0166] When the optical lens is used for imaging, the light from the object sequentially passes through each surface S1 to S18 and finally forms an image on the imaging surface; when the optical lens is used for projection, the light from the image source surface sequentially passes through each surface S18 to S1 and finally projects onto the target object (not shown).

[0167] Table 7 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens of the optical lens of Embodiment 4. In this embodiment, the first side and the second sides S1-S6, S13, S14 of the first lens L1, the second lens L2, the third lens L3, and the seventh lens L7 are all aspherical surfaces. Table 8 shows the conic coefficient and the high-order term coefficients that can be used for each aspherical mirror surface in this embodiment. Among them, each aspherical surface profile can be defined by the formula (1) given in Embodiment 1 above.

[0168]

[0169] Table 7

[0170] Surface number k A4 A6 A8 A10 A12 A14 A16 S1 6.8604 0.0033979 -0.00025836 0.000012698 -7.4934E-07 2.3317E-08 -2.7371E-10 5.9249E-13 S2 -16.484 0.0083011 -0.00077112 0.000037627 -2.2271E-06 1.1197E-07 -2.8099E-09 2.6745E-11 S3 -6.476 0.0079049 -0.0015867 0.00019237 -0.000018981 1.5032E-06 -7.7373E-08 1.7869E-09 S4 -4.3606 0.027119 -0.009781 0.0028416 -0.00058659 0.000079042 -5.9456E-06 1.8109E-07 S5 -31.184 -0.00069508 -0.000027352 0.00010967 -0.00005173 0.000011936 -1.3158E-06 5.3761E-08 S6 -15.043 0.00058839 0.000032832 -6.8732E-06 1.5687E-06 -2.0803E-07 1.4283E-08 -3.9975E-10 S13 1.5394 0.00026897 -0.000013289 1.7339E-06 -1.2228E-07 4.4161E-09 -8.2779E-11 5.4955E-13 S14 -52.002 0.0002283 -0.00027816 0.000016487 -4.394E-07 5.206E-09 -1.5661E-11 -8.8574E-14

[0171] Table 8

[0172] Figure 37 shows the angular resolution curve of the optical lens according to Embodiment 4 of the present application. Among them, the abscissa represents the field angle of the optical lens increasing from 0° to the maximum half-field angle of 60°, and the ordinate represents the central resolution value of the angular resolution curve of the optical lens. From Figure 37 it can be seen that the central resolution value of the angular resolution curve of the optical lens gradually decreases as the field angle of the optical lens increases.

[0173] Example 5

[0174] The following refers to Figure 5 to describe the optical lens according to Embodiment 5 of the present application. Figure 5 shows a schematic structural diagram of the optical lens according to Embodiment 5 of the present application.

[0175] As Figure 5 shown, the optical lens sequentially includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7 along the optical axis from the first side to the second side.

[0176] The first lens L1 is a convex-concave lens with a positive optical power. Its first side S1 is a convex surface, and its second side S2 is a concave surface. The second lens L2 is a convex-concave lens with a negative optical power. Its first side S3 is a convex surface, and its second side S4 is a concave surface. The third lens L3 is a concave-convex lens with a positive optical power. Its first side S5 is a concave surface, and its second side S6 is a convex surface. The fourth lens L4 is a convex-convex lens with a positive optical power. Its first side S8 is a convex surface, and its second side S9 is a convex surface. The fifth lens L5 is a convex-concave lens with a negative optical power. Its first side S10 is a convex surface, and its second side S11 is a concave surface. The sixth lens L6 is a convex-convex lens with a positive optical power. Its first side S11 is a convex surface, and its second side S12 is a convex surface. The seventh lens L7 is a convex-concave lens with a positive optical power. Its first side S13 is a convex surface, and its second side S14 is a concave surface. Among them, the fifth lens L5 and the sixth lens L6 are cemented to form a doublet lens; the first side S1 of the first lens L1 and the second side S14 of the seventh lens L7 have an inflection point.

[0177] The optical lens further includes a stop STO disposed between the third lens L3 and the fourth lens L4, which is beneficial to reasonably distribute the heights of the front and rear group of light rays, shorten the total length of the optical system, and reduce the apertures of the front and rear lens groups.

[0178] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the seventh lens L7 and the imaging surface (IMA). The filter has, for example, a first side S15 and a second side S16, and the protective glass has, for example, a first side S17 and a second side S18.

[0179] When the optical lens is used for imaging, the light from the object sequentially passes through the surfaces S1 to S18 and finally forms an image on the imaging surface; when the optical lens is used for projection, the light from the image source surface sequentially passes through the surfaces S18 to S1 and finally projects onto the target object (not shown).

[0180] Table 9 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens of the optical lens of Embodiment 5. In this embodiment, the first sides and the second sides S1 - S6, S13, S14 of the first lens L1, the second lens L2, the third lens L3, and the seventh lens L7 are all aspherical surfaces. Table 10 shows the conic coefficient and the high-order term coefficient that can be used for each aspherical mirror surface in this embodiment. Among them, each aspherical surface type can be defined by the formula (1) given in Embodiment 1 above.

[0181]

[0182]

[0183] Table 9

[0184] Surface number k A4 A6 A8 A10 A12 A14 A16 S1 5.2677 0.0020722 -0.00010879 -1.8787E-06 1.5842E-07 -3.3195E-09 4.4965E-11 -3.5141E-13 S2 -73.697 0.0084266 -0.00069959 1.4882E-06 2.1604E-06 -1.1704E-07 2.6721E-09 -2.2816E-11 S3 -16.087 0.0063434 -0.0010914 0.000071475 -1.9104E-06 -1.5887E-08 1.6772E-09 -9.3305E-12 S4 -5.2588 0.017339 -0.0057141 0.0014353 -0.00025907 0.000030845 -2.0694E-06 5.6584E-08 S5 4.7141 -0.00062613 -0.00013492 0.00010513 -0.000040741 8.0326E-06 -7.7658E-07 2.8443E-08 S6 1.278 0.00028358 -0.000019192 9.2857E-06 -1.7587E-06 1.895E-07 -1.0615E-08 2.4135E-10 S13 1.85 0.00023983 -0.000010801 1.1309E-06 -7.5064E-08 2.5413E-09 -4.402E-11 2.6725E-13 S14 -64.823 0.00025022 -0.00027528 0.000016511 -4.5116E-07 5.9153E-09 -3.0387E-11 1.136E-14

[0185] Table 10

[0186] Figure 38 shows the angular resolution curve of the optical lens according to Embodiment 5 of the present application. Among them, the abscissa represents that the field of view angle of the optical lens increases from 0° to the maximum semi-field angle of 50°, and the ordinate represents the central resolution value of the angular resolution curve of the optical lens. From Figure 38 it can be seen that the central resolution value of the angular resolution curve of the optical lens gradually decreases as the field of view angle of the optical lens increases.

[0187] Example 6

[0188] The following refers to Figure 6 describe the optical lens according to Embodiment 6 of the present application. Figure 6 shows a schematic structural diagram of the optical lens according to Embodiment 6 of the present application.

[0189] As Figure 6 shown, the optical lens sequentially includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7 along the optical axis from the first side to the second side.

[0190] The first lens L1 is a convex-concave lens with a positive optical power, its first side S1 is a convex surface, and its second side S2 is a concave surface. The second lens L2 is a convex-concave lens with a negative optical power, its first side S3 is a convex surface, and its second side S4 is a concave surface. The third lens L3 is a concave-convex lens with a positive optical power, its first side S5 is a concave surface, and its second side S6 is a convex surface. The fourth lens L4 is a convex-convex lens with a positive optical power, its first side S8 is a convex surface, and its second side S9 is a convex surface. The fifth lens L5 is a convex-concave lens with a negative optical power, its first side S10 is a convex surface, and its second side S11 is a concave surface. The sixth lens L6 is a convex-convex lens with a positive optical power, its first side S11 is a convex surface, and its second side S12 is a convex surface. The seventh lens L7 is a convex-concave lens with a positive optical power, its first side S13 is a convex surface, and its second side S14 is a concave surface. Among them, the fifth lens L5 and the sixth lens L6 are cemented to form a doublet lens; the first side S1 of the first lens L1 and the second side S14 of the seventh lens L7 have an inflection point.

[0191] The optical lens further includes a diaphragm STO disposed between the third lens L3 and the fourth lens L4, which is beneficial to reasonably distribute the light height of the front and rear groups, shorten the total length of the optical system, and reduce the aperture of the front and rear lens groups.

[0192] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the seventh lens L7 and the imaging surface (IMA). The filter has, for example, a first side S15 and a second side S16, and the protective glass has, for example, a first side S17 and a second side S18.

[0193] When the optical lens is used for imaging, light from an object sequentially passes through the surfaces S1 to S18 and finally forms an image on the imaging surface; when the optical lens is used for projection, light from the image source surface sequentially passes through the surfaces S18 to S1 and finally projects onto a target object (not shown).

[0194] Table 11 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens of the optical lens according to Embodiment 6. In this embodiment, the first sides and second sides S1-S6, S13, S14 of the first lens L1, the second lens L2, the third lens L3, and the seventh lens L7 are all aspherical surfaces. Table 12 shows the conic coefficients and higher-order term coefficients that can be used for each aspherical mirror surface in this embodiment. Among them, each aspherical surface type can be defined by formula (1) given in Embodiment 1 above.

[0195]

[0196] Table 11

[0197]

[0198]

[0199] Table 12

[0200] Figure 39 shows the angular resolution curve of the optical lens according to Embodiment 6 of the present application. Among them, the abscissa represents the field-of-view angle of the optical lens increasing from 0° to the maximum half-field angle of 50°, and the ordinate represents the central resolution value of the angular resolution curve of the optical lens. From Figure 39 it can be seen that the central resolution value of the angular resolution curve of the optical lens gradually decreases as the field-of-view angle of the optical lens increases.

[0201] Example 7

[0202] The following refers to Figure 7 to describe the optical lens according to Embodiment 7 of the present application. Figure 7 shows a schematic structural diagram of the optical lens according to Embodiment 7 of the present application.

[0203] As Figure 7 shown, the optical lens sequentially includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7 along the optical axis from the first side to the second side.

[0204] The first lens L1 is a convex-concave lens with a positive focal power, its first side S1 is a convex surface, and its second side S2 is a concave surface. The second lens L2 is a convex-concave lens with a negative focal power, its first side S3 is a convex surface, and its second side S4 is a concave surface. The third lens L3 is a concave-convex lens with a positive focal power, its first side S5 is a concave surface, and its second side S6 is a convex surface. The fourth lens L4 is a concave-convex lens with a positive focal power, its first side S8 is a concave surface, and its second side S9 is a convex surface. The fifth lens L5 is a convex-concave lens with a negative focal power, its first side S10 is a convex surface, and its second side S11 is a concave surface. The sixth lens L6 is a convex-convex lens with a positive focal power, its first side S11 is a convex surface, and its second side S12 is a convex surface. The seventh lens L7 is a convex-concave lens with a positive focal power, its first side S13 is a convex surface, and its second side S14 is a concave surface. Among them, the fifth lens L5 and the sixth lens L6 are cemented to form a doublet lens; the first side S1 of the first lens L1 and the second side S14 of the seventh lens L7 have an inflection point.

[0205] The optical lens further includes a stop STO disposed between the third lens L3 and the fourth lens L4, which is beneficial to reasonably distribute the heights of the front and rear group of light rays, shorten the total length of the optical system, and reduce the apertures of the front and rear lens groups. For example, the stop STO can be disposed at a position between the third lens L3 and the fourth lens L4 close to the first side S8 of the fourth lens L4.

[0206] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the seventh lens L7 and the imaging surface (IMA). The filter has, for example, a first side S15 and a second side S16, and the protective glass has, for example, a first side S17 and a second side S18.

[0207] When the optical lens is used for imaging, the light from the object sequentially passes through each surface S1 to S18 and finally forms an image on the imaging surface; when the optical lens is used for projection, the light from the image source surface sequentially passes through each surface S18 to S1 and finally projects onto the target object (not shown).

[0208] Table 13 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens of the optical lens of Embodiment 7. In this embodiment, the first side and the second sides S1-S6, S13, S14 of the first lens L1, the second lens L2, the third lens L3, and the seventh lens L7 are all aspherical surfaces. Table 14 shows the conic coefficient and the high-order term coefficient that can be used for each aspherical mirror surface in this embodiment. Among them, each aspherical surface type can be defined by the formula (1) given in Embodiment 1 above.

[0209]

[0210] Table 13

[0211] Surface number k A4 A6 A8 A10 A12 A14 A16 S1 6.1708 0.0025339 -0.00014725 2.4983E-07 7.5459E-08 -3.6839E-09 1.358E-10 -1.6701E-12 S2 49.765 0.0093186 -0.00088493 0.000026596 -6.3467E-08 -1.0588E-08 2.0312E-10 -8.1524E-13 S3 -11.419 0.0070261 -0.0013441 0.00010562 -4.7176E-06 1.4337E-07 -4.8577E-09 1.3626E-10 S4 -4.5903 0.018735 -0.0063132 0.0015515 -0.00026895 0.000030697 -1.9817E-06 5.2937E-08 S5 3.7118 -0.0010357 -0.000067361 0.000062734 -0.000027523 5.8413E-06 -0.000000595 2.2811E-08 S6 1.1109 0.00043813 -5.7571E-06 5.3227E-06 -8.9316E-07 9.3837E-08 -5.2522E-09 1.2225E-10 S13 2.5833 0.00034653 -9.8397E-06 0.000001101 -8.762E-08 3.4128E-09 -6.8239E-11 4.6798E-13 S14 -99.0000 -2.0258E-04 -2.8873E-04 2.0193E-05 -6.6534E-07 1.1670E-08 -1.0582E-10 3.9657E-13

[0212] Table 14

[0213] Figure 40 shows the angular resolution curve of the optical lens according to Embodiment 7 of the present application. Among them, the abscissa represents the field angle of the optical lens increasing from 0° to the maximum semi-field angle of 50°, and the ordinate represents the central resolution value of the angular resolution curve of the optical lens. From Figure 40 it can be seen that the central resolution value of the angular resolution curve of the optical lens gradually decreases as the field angle of the optical lens increases.

[0214] Example 8

[0215] The following refers to Figure 8 to describe the optical lens according to Embodiment 8 of the present application. Figure 8 shows a schematic structural diagram of the optical lens according to Embodiment 8 of the present application.

[0216] As Figure 8 shown, the optical lens sequentially includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7 along the optical axis from the first side to the second side.

[0217] The first lens L1 is a convex-concave lens with a positive optical power, its first side S1 is a convex surface, and its second side S2 is a concave surface. The second lens L2 is a convex-concave lens with a negative optical power, its first side S3 is a convex surface, and its second side S4 is a concave surface. The third lens L3 is a concave-convex lens with a positive optical power, its first side S5 is a concave surface, and its second side S6 is a convex surface. The fourth lens L4 is a concave-convex lens with a positive optical power, its first side S8 is a concave surface, and its second side S9 is a convex surface. The fifth lens L5 is a convex-concave lens with a negative optical power, its first side S10 is a convex surface, and its second side S11 is a concave surface. The sixth lens L6 is a convex-convex lens with a positive optical power, its first side S11 is a convex surface, and its second side S12 is a convex surface. The seventh lens L7 is a convex-concave lens with a positive optical power, its first side S13 is a convex surface, and its second side S14 is a concave surface. Among them, the fifth lens L5 and the sixth lens L6 are cemented to form a doublet lens; the first side S1 of the first lens L1 and the second side S14 of the seventh lens L7 have an inflection point.

[0218] The optical lens further includes a stop STO disposed between the third lens L3 and the fourth lens L4, which is conducive to the reasonable distribution of the light heights of the front and rear groups, shortening the total length of the optical system, and reducing the apertures of the front and rear lens groups. For example, the stop STO can be disposed at a position close to the first side S8 of the fourth lens L4 between the third lens L3 and the fourth lens L4.

[0219] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the seventh lens L7 and the imaging surface (IMA). The filter, for example, has a first side S15 and a second side S16, and the protective glass, for example, has a first side S17 and a second side S18.

[0220] When the optical lens is used for imaging, the light from the object sequentially passes through the surfaces S1 to S18 and finally forms an image on the imaging surface; when the optical lens is used for projection, the light from the image source surface sequentially passes through the surfaces S18 to S1 and finally projects onto the target object (not shown).

[0221] Table 15 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens of the optical lens of Embodiment 8. In this embodiment, the first sides and the second sides S1-S6, S13, S14 of the first lens L1, the second lens L2, the third lens L3, and the seventh lens L7 are all aspherical surfaces. Table 16 shows the conic coefficients and high-order term coefficients that can be used for each aspherical mirror surface in this embodiment. Among them, each aspherical surface type can be defined by the formula (1) given in Embodiment 1 above.

[0222]

[0223]

[0224] Table 15

[0225] Surface number k A4 A6 A8 A10 A12 A14 A16 S1 6.1708 0.0025595 -0.00014874 2.5235E-07 7.6221E-08 -3.7212E-09 1.3718E-10 -1.687E-12 S2 49.765 0.0094127 -0.00089387 0.000026865 -6.4108E-08 -1.0695E-08 2.0517E-10 -8.2347E-13 S3 -11.419 0.0070971 -0.0013577 0.00010669 -4.7653E-06 1.4482E-07 -4.9068E-09 1.3764E-10 S4 -4.5903 0.018924 -0.006377 0.0015672 -0.00027167 0.000031007 -2.0017E-06 5.2937E-08 S5 3.7118 -0.0010461 -0.000068035 0.000063361 -0.000027799 5.8998E-06 -6.0095E-07 2.3039E-08 S6 1.1109 0.00044251 -5.8147E-06 5.3759E-06 -9.0209E-07 9.4775E-08 -5.3048E-09 1.2347E-10 S13 2.5833 0.00034653 -9.8397E-06 0.000001101 -8.762E-08 3.4128E-09 -6.8239E-11 4.6798E-13 S14 -99 -0.00020258 -0.00028873 0.000020193 -6.6534E-07 1.167E-08 -1.0582E-10 3.9657E-13

[0226] Table 16

[0227] Figure 41 shows the angular resolution curve of the optical lens according to Embodiment 8 of the present application. Among them, the abscissa represents the field angle of the optical lens increasing from 0° to the maximum semi-field angle of 50°, and the ordinate represents the central resolution value of the angular resolution curve of the optical lens. As Figure 41 can be seen, the central resolution value of the angular resolution curve of the optical lens gradually decreases as the field angle of the optical lens increases.

[0228] Example 9

[0229] The following refers to Figure 9 to describe the optical lens according to Embodiment 9 of the present application. Figure 9Shows a schematic structural diagram of an optical lens according to Embodiment 9 of the present application.

[0230] As Figure 9 shown, the optical lens sequentially includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7 along the optical axis from the first side to the second side.

[0231] The first lens L1 is a convex-concave lens with a positive optical power, its first side S1 is a convex surface, and its second side S2 is a concave surface. The second lens L2 is a convex-concave lens with a negative optical power, its first side S3 is a convex surface, and its second side S4 is a concave surface. The third lens L3 is a concave-convex lens with a positive optical power, its first side S5 is a concave surface, and its second side S6 is a convex surface. The fourth lens L4 is a convex-convex lens with a positive optical power, its first side S8 is a convex surface, and its second side S9 is a convex surface. The fifth lens L5 is a convex-convex lens with a positive optical power, its first side S10 is a convex surface, and its second side S11 is a convex surface. The sixth lens L6 is a concave-convex lens with a negative optical power, its first side S11 is a concave surface, and its second side S12 is a convex surface. The seventh lens L7 is a convex-concave lens with a positive optical power, its first side S13 is a convex surface, and its second side S14 is a concave surface. Among them, the fifth lens L5 and the sixth lens L6 are cemented to form a doublet lens; the first side S1 and the second side S2 of the first lens L1 and the second side S14 of the seventh lens L7 have an inflection point.

[0232] The optical lens further includes a stop STO disposed between the third lens L3 and the fourth lens L4, which is beneficial to reasonably distribute the light heights of the front and rear groups, shorten the total length of the optical system, and reduce the apertures of the front and rear lens groups. For example, the stop STO can be disposed at a position close to the first side S8 of the fourth lens L4 between the third lens L3 and the fourth lens L4.

[0233] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the seventh lens L7 and the imaging surface (IMA). The filter, for example, has a first side S15 and a second side S16, and the protective glass, for example, has a first side S17 and a second side S18.

[0234] When the optical lens is used for imaging, light from an object sequentially passes through each surface S1 to S18 and finally forms an image on the imaging surface; when the optical lens is used for projection, light from the image source surface sequentially passes through each surface S18 to S1 and is finally projected onto a target object (not shown).

[0235] Table 17 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens of the optical lens of Example 9. In this embodiment, the first surfaces and the second surfaces S1-S6, S13, S14 of the first lens L1, the second lens L2, the third lens L3, and the seventh lens L7 are all aspherical surfaces. Table 18 shows the conic coefficients and higher-order term coefficients that can be used for each aspherical mirror surface in this embodiment. Among them, each aspherical surface profile can be defined by formula (1) given in Embodiment 1 above.

[0236]

[0237] Table 17

[0238] Surface number k A4 A6 A8 A10 A12 A14 A16 S1 7.6942 0.0024851 -0.00015659 5.0771E-07 1.1703E-07 -6.8009E-09 2.2255E-10 -2.5379E-12 S2 -99 0.010468 -0.0011584 0.000038212 8.9776E-07 -1.0834E-07 3.1926E-09 -3.1939E-11 S3 -12.517 0.0075998 -0.0014992 0.00008485 1.9182E-06 -4.8669E-07 2.3605E-08 -3.8683E-10 S4 -4.685 0.019916 -0.0065206 0.0015486 -0.00026002 0.000029097 -1.8587E-06 4.8761E-08 S5 2.1349 -0.00078548 -0.000019219 0.000042151 -0.000023326 5.3111E-06 -5.6211E-07 2.2066E-08 S6 1.4225 0.00018707 -8.1428E-06 4.2944E-06 -8.3018E-07 9.3302E-08 -5.5449E-09 1.3342E-10 S13 1.1145 0.00033384 -0.000017302 1.6762E-06 -1.1454E-07 4.1069E-09 -7.7103E-11 5.1014E-13 S14 -99 0.00025363 -0.00029022 0.000018564 -5.5978E-07 8.4551E-09 -5.713E-11 1.134E-13

[0239] Table 18

[0240] Figure 42 shows the angular resolution curve of the optical lens according to Embodiment 9 of the present application. Among them, the abscissa represents the field angle of the optical lens increasing from 0° to the maximum half-field angle of 50°, and the ordinate represents the central resolution value of the angular resolution curve of the optical lens. From Figure 42 it can be seen that the central resolution value of the angular resolution curve of the optical lens gradually decreases as the field angle of the optical lens increases.

[0241] Example 10

[0242] The following refers to Figure 10 to describe the optical lens according to Embodiment 10 of the present application. Figure 10 shows a schematic structural diagram of the optical lens according to Embodiment 10 of the present application.

[0243] As Figure 10 shown, the optical lens sequentially includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7 along the optical axis from the first side to the second side.

[0244] The first lens L1 is a convex-concave lens with a positive optical power. Its first surface S1 is a convex surface, and its second surface S2 is a concave surface. The second lens L2 is a convex-concave lens with a negative optical power. Its first surface S3 is a convex surface, and its second surface S4 is a concave surface. The third lens L3 is a concave-convex lens with a positive optical power. Its first surface S5 is a concave surface, and its second surface S6 is a convex surface. The fourth lens L4 is a convex-convex lens with a positive optical power. Its first surface S8 is a convex surface, and its second surface S9 is a convex surface. The fifth lens L5 is a convex-convex lens with a positive optical power. Its first surface S10 is a convex surface, and its second surface S11 is a convex surface. The sixth lens L6 is a concave-convex lens with a negative optical power. Its first surface S11 is a concave surface, and its second surface S12 is a convex surface. The seventh lens L7 is a convex-concave lens with a positive optical power. Its first surface S13 is a convex surface, and its second surface S14 is a concave surface. Among them, the fifth lens L5 and the sixth lens L6 are cemented to form a doublet lens; the first surface S1 and the second surface S2 of the first lens L1 and the second surface S14 of the seventh lens L7 have an inflection point.

[0245] The optical lens further includes a stop STO disposed between the third lens L3 and the fourth lens L4, which is beneficial to reasonably distribute the light heights of the front and rear groups, shorten the total length of the optical system, and reduce the apertures of the front and rear lens groups. For example, the stop STO can be disposed at a position between the third lens L3 and the fourth lens L4 close to the first surface S8 of the fourth lens L4.

[0246] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the seventh lens L7 and the imaging surface (IMA). The filter has, for example, a first surface S15 and a second surface S16, and the protective glass has, for example, a first surface S17 and a second surface S18.

[0247] When the optical lens is used for imaging, the light from the object sequentially passes through the surfaces S1 to S18 and finally forms an image on the imaging surface; when the optical lens is used for projection, the light from the image source surface sequentially passes through the surfaces S18 to S1 and finally projects onto the target object (not shown).

[0248] Table 19 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens of the optical lens of Embodiment 10. In this embodiment, the first surfaces and the second surfaces S1-S6, S13, S14 of the first lens L1, the second lens L2, the third lens L3, and the seventh lens L7 are all aspherical surfaces. Table 20 shows the conic coefficient and the high-order term coefficient that can be used for each aspherical mirror surface in this embodiment. Among them, each aspherical surface type can be defined by the formula (1) given in Embodiment 1 above.

[0249]

[0250] Table 19

[0251] Surface number k A4 A6 A8 A10 A12 A14 A16 S1 7.6942 0.0025102 -0.00015817 5.1284E-07 1.1821E-07 -6.8696E-09 2.248E-10 -2.5635E-12 S2 -99 0.010573 -0.0011701 0.000038598 9.0682E-07 -1.0944E-07 3.2249E-09 -3.2261E-11 S3 -12.517 0.0076766 -0.0015143 0.000085707 1.9376E-06 -4.9161E-07 2.3843E-08 -3.9074E-10 S4 -4.685 0.020117 -0.0065865 0.0015642 -0.00026265 0.000029391 -1.8775E-06 4.9253E-08 S5 2.1349 -0.00077762 -0.000019027 0.00004173 -0.000023092 5.2579E-06 -5.6211E-07 2.2066E-08 S6 1.4225 0.00018707 -8.1428E-06 4.2944E-06 -8.3018E-07 9.3302E-08 -5.5449E-09 1.3342E-10 S13 1.1145 0.00033217 -0.000017216 1.6762E-06 -1.134E-07 4.0658E-09 -7.6332E-11 5.0504E-13 S14 -99 0.00025363 -0.00029022 0.000018564 -5.5978E-07 8.4551E-09 -5.713E-11 1.134E-13

[0252] Table 20

[0253] Figure 43 shows the angular resolution curve of the optical lens according to Embodiment 10 of the present application. Among them, the abscissa represents the field angle of the optical lens increasing from 0° to the maximum semi-field angle of 50°, and the ordinate represents the central resolution value of the angular resolution curve of the optical lens. From Figure 43 it can be seen that the central resolution value of the angular resolution curve of the optical lens gradually decreases as the field angle of the optical lens increases.

[0254] Example 11

[0255] The following is a reference to Figure 11 describe the optical lens according to Embodiment 11 of the present application. Figure 11 shows a schematic structural diagram of the optical lens according to Embodiment 11 of the present application.

[0256] As Figure 11 shown, the optical lens sequentially includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7 along the optical axis from the first side to the second side.

[0257] The first lens L1 is a convex-concave lens with a negative optical power. Its first side S1 is a convex surface, and its second side S2 is a concave surface. The second lens L2 is a convex-concave lens with a negative optical power. Its first side S3 is a convex surface, and its second side S4 is a concave surface. The third lens L3 is a concave-convex lens with a positive optical power. Its first side S5 is a concave surface, and its second side S6 is a convex surface. The fourth lens L4 is a convex-convex lens with a positive optical power. Its first side S8 is a convex surface, and its second side S9 is a convex surface. The fifth lens L5 is a convex-concave lens with a negative optical power. Its first side S10 is a convex surface, and its second side S11 is a concave surface. The sixth lens L6 is a convex-convex lens with a positive optical power. Its first side S11 is a convex surface, and its second side S12 is a convex surface. The seventh lens L7 is a convex-concave lens with a negative optical power. Its first side S13 is a convex surface, and its second side S14 is a concave surface. Among them, the fifth lens L5 and the sixth lens L6 are cemented to form a doublet lens; the second side S14 of the seventh lens L7 has an inflection point.

[0258] The optical lens further includes a diaphragm STO disposed between the third lens L3 and the fourth lens L4, which is beneficial to reasonably distribute the light height of the front and rear groups, shorten the total length of the optical system, and reduce the apertures of the front and rear lens groups. For example, the diaphragm STO can be disposed at a position close to the second side S6 of the third lens L3 between the third lens L3 and the fourth lens L4.

[0259] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the seventh lens L7 and the imaging surface (IMA). The filter may have, for example, a first side surface S15 and a second side surface S16, and the protective glass may have, for example, a first side surface S17 and a second side surface S18.

[0260] When the optical lens is used for imaging, light from an object sequentially passes through the surfaces S1 to S18 and finally forms an image on the imaging surface; when the optical lens is used for projection, light from the image source surface sequentially passes through the surfaces S18 to S1 and finally projects onto a target object (not shown).

[0261] Table 21 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens of the optical lens according to Embodiment 11. In this embodiment, the first side surfaces and the second side surfaces S1-S6, S13, S14 of the first lens L1, the second lens L2, the third lens L3, and the seventh lens L7 are all aspherical surfaces. Table 22 shows the conic coefficient and the high-order term coefficient that can be used for each aspherical mirror surface in this embodiment. Among them, each aspherical surface type can be defined by the formula (1) given in Embodiment 1 above.

[0262]

[0263]

[0264] Table 21

[0265] Surface number k A4 A6 A8 A10 A12 A14 A16 S1 -0.32692 0.0023061 -0.00017187 4.0622E-06 -4.1361E-08 -1.2536E-09 5.2046E-11 -4.7673E-13 S2 -96.555 0.0082016 -0.0010616 0.000076001 -3.6354E-06 1.0847E-07 -1.7311E-09 1.1539E-11 S3 -13.085 0.0058002 -0.0012344 0.00011766 -0.00000651 2.0862E-07 -3.2281E-09 1.7927E-11 S4 -5.9724 0.016492 -0.0051644 0.001164 -0.00018485 0.000019024 -1.1028E-06 2.6358E-08 S5 7.5891 -0.00079229 -0.00013332 0.000077792 -0.000031352 6.2206E-06 -6.1546E-07 2.3411E-08 S6 1.2729 0.00021455 9.8569E-06 -1.1075E-06 2.737E-07 -2.8169E-08 1.5777E-09 -3.293E-11 S13 1.2355 0.000082543 0.000013184 -6.2459E-07 1.3401E-08 -1.4745E-10 -4.1593E-12 4.3334E-14 S14 -30.018 -0.00084787 -0.00020634 0.000014135 -3.957E-07 4.5752E-09 -5.9699E-12 -1.6253E-13

[0266] Table 22

[0267] Figure 44 shows the angular resolution curve of the optical lens according to Embodiment 11 of the present application. Among them, the abscissa represents the field angle of the optical lens increasing from 0° to the maximum half-field angle of 50°, and the ordinate represents the central resolution value of the angular resolution curve of the optical lens. As Figure 44 can be seen, the central resolution value of the angular resolution curve of the optical lens gradually decreases as the field angle of the optical lens increases.

[0268] Example 12

[0269] The following refers to Figure 12 to describe the optical lens according to Embodiment 12 of the present application. Figure 12 shows a schematic structural diagram of the optical lens according to Embodiment 12 of the present application.

[0270] As Figure 12As shown, the optical lens sequentially includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7 along the optical axis from the first side to the second side.

[0271] The first lens L1 is a convex-concave lens with a negative focal power, its first side S1 is a convex surface, and its second side S2 is a concave surface. The second lens L2 is a convex-concave lens with a negative focal power, its first side S3 is a convex surface, and its second side S4 is a concave surface. The third lens L3 is a concave-convex lens with a positive focal power, its first side S5 is a concave surface, and its second side S6 is a convex surface. The fourth lens L4 is a convex-convex lens with a positive focal power, its first side S8 is a convex surface, and its second side S9 is a convex surface. The fifth lens L5 is a convex-concave lens with a negative focal power, its first side S10 is a convex surface, and its second side S11 is a concave surface. The sixth lens L6 is a convex-convex lens with a positive focal power, its first side S11 is a convex surface, and its second side S12 is a convex surface. The seventh lens L7 is a convex-concave lens with a negative focal power, its first side S13 is a convex surface, and its second side S14 is a concave surface. Among them, the fifth lens L5 and the sixth lens L6 are cemented to form a doublet lens; the second side S14 of the seventh lens L7 has an inflection point.

[0272] The optical lens further includes a stop STO disposed between the third lens L3 and the fourth lens L4, which is beneficial to reasonably distribute the light heights of the front and rear groups, shorten the total length of the optical system, and reduce the apertures of the front and rear lens groups. For example, the stop STO can be disposed at a position close to the second side S6 of the third lens L3 between the third lens L3 and the fourth lens L4.

[0273] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the seventh lens L7 and the imaging surface (IMA). The filter, for example, has a first side S15 and a second side S16, and the protective glass, for example, has a first side S17 and a second side S18.

[0274] When the optical lens is used for imaging, the light from the object sequentially passes through the surfaces S1 to S18 and finally forms an image on the imaging surface; when the optical lens is used for projection, the light from the image source surface sequentially passes through the surfaces S18 to S1 and finally projects onto the target object (not shown).

[0275] Table 23 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens of the optical lens of Embodiment 12. In this embodiment, the first sides and the second sides S1 - S6, S13, S14 of the first lens L1, the second lens L2, the third lens L3, and the seventh lens L7 are all aspherical surfaces. Table 24 shows the conic coefficient and the high-order term coefficients of the aspherical surfaces that can be used in this embodiment. Among them, each aspherical surface type can be defined by the formula (1) given in Embodiment 1 above.

[0276]

[0277]

[0278] Table 23

[0279] Surface number k A4 A6 A8 A10 A12 A14 A16 S1 -0.32692 0.0023294 -0.00017361 4.1032E-06 -4.1779E-08 -1.2662E-09 5.2571E-11 -4.8154E-13 S2 -96.555 0.0082845 -0.0010723 0.000076768 -3.6721E-06 1.0956E-07 -1.7485E-09 1.1655E-11 S3 -13.085 0.0058588 -0.0012469 0.00011885 -6.5758E-06 2.1073E-07 -3.2607E-09 1.8108E-11 S4 -5.9724 0.016658 -0.0052166 0.0011758 -0.00018672 0.000019216 -1.1139E-06 2.6624E-08 S5 7.5891 -0.00079229 -0.00013332 0.000077792 -0.000031352 6.2206E-06 -6.1546E-07 2.3411E-08 S6 1.2729 0.00021455 9.8569E-06 -1.1075E-06 2.737E-07 -2.8169E-08 1.5777E-09 -3.293E-11 S13 1.2355 0.000081718 0.000013052 -6.1834E-07 1.3267E-08 -1.4597E-10 -4.1177E-12 4.2901E-14 S14 -30.018 -0.00083939 -0.00020428 0.000013994 -3.9175E-07 4.5295E-09 -5.9102E-12 -1.6091E-13

[0280] Table 24

[0281] Figure 45 shows the angular resolution curve of the optical lens according to Embodiment 12 of the present application. Among them, the abscissa represents the field angle of the optical lens increasing from 0° to the maximum semi-field angle of 50°, and the ordinate represents the central resolution value of the angular resolution curve of the optical lens. From Figure 45 it can be seen that the central resolution value of the angular resolution curve of the optical lens gradually decreases as the field angle of the optical lens increases.

[0282] Example 13

[0283] The following refers to Figure 13 to describe the optical lens according to Embodiment 13 of the present application. Figure 13 shows a schematic structural diagram of the optical lens according to Embodiment 13 of the present application.

[0284] As Figure 13 shown, the optical lens sequentially includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7 along the optical axis from the first side to the second side.

[0285] The first lens L1 is a convex-concave lens with a positive optical power, its first side S1 is a convex surface, and its second side S2 is a concave surface. The second lens L2 is a convex-concave lens with a negative optical power, its first side S3 is a convex surface, and its second side S4 is a concave surface. The third lens L3 is a concave-convex lens with a positive optical power, its first side S5 is a concave surface, and its second side S6 is a convex surface. The fourth lens L4 is a convex-convex lens with a positive optical power, its first side S8 is a convex surface, and its second side S9 is a convex surface. The fifth lens L5 is a convex-concave lens with a negative optical power, its first side S10 is a convex surface, and its second side S11 is a concave surface. The sixth lens L6 is a convex-concave lens with a positive optical power, its first side S11 is a convex surface, and its second side S12 is a concave surface. The seventh lens L7 is a convex-convex lens with a positive optical power, its first side S13 is a convex surface, and its second side S14 is a convex surface. Among them, the fifth lens L5 and the sixth lens L6 are cemented to form a doublet lens; the first side S1 and the second side S2 of the first lens L1 have an inflection point.

[0286] The optical lens further includes a stop STO disposed between the third lens L3 and the fourth lens L4, which is conducive to reasonably distributing the heights of the front and rear group of light rays, shortening the total length of the optical system, and reducing the apertures of the front and rear lens groups. For example, the stop STO can be disposed at a position close to the first side surface S8 of the fourth lens L4 between the third lens L3 and the fourth lens L4.

[0287] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the seventh lens L7 and the imaging surface (IMA). The filter has, for example, a first side surface S15 and a second side surface S16, and the protective glass has, for example, a first side surface S17 and a second side surface S18.

[0288] When the optical lens is used for imaging, the light from an object sequentially passes through the surfaces S1 to S18 and finally forms an image on the imaging surface; when the optical lens is used for projection, the light from the image source surface sequentially passes through the surfaces S18 to S1 and finally projects onto a target object (not shown).

[0289] Table 25 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens of the optical lens according to Embodiment 13. In this embodiment, the first side surfaces and the second side surfaces S1-S6, S13, S14 of the first lens L1, the second lens L2, the third lens L3, and the seventh lens L7 are all aspherical surfaces. Table 26 shows the conic coefficient and the high-order term coefficient that can be used for each aspherical mirror surface in this embodiment. Among them, each aspherical surface type can be defined by the formula (1) given in Embodiment 1 above.

[0290]

[0291] Table 25

[0292]

[0293]

[0294] Table 26

[0295] Figure 46 shows the angular resolution curve of the optical lens according to Embodiment 13 of the present application. Among them, the abscissa represents the field angle of the optical lens increasing from 0° to the maximum semi-field angle of 50°, and the ordinate represents the central resolution value of the angular resolution curve of the optical lens. As Figure 46 can be seen, the central resolution value of the angular resolution curve of the optical lens gradually decreases as the field angle of the optical lens increases.

[0296] Example 14

[0297] The following refers to Figure 14 to describe the optical lens according to Embodiment 14 of the present application.Figure 14 The structural schematic diagram of an optical lens according to Embodiment 14 of the present application is shown.

[0298] As Figure 14 shown, the optical lens sequentially includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7 along the optical axis from the first side to the second side.

[0299] The first lens L1 is a convex-concave lens with a positive optical power, its first side S1 is a convex surface, and its second side S2 is a concave surface. The second lens L2 is a convex-concave lens with a negative optical power, its first side S3 is a convex surface, and its second side S4 is a concave surface. The third lens L3 is a concave-convex lens with a positive optical power, its first side S5 is a concave surface, and its second side S6 is a convex surface. The fourth lens L4 is a convex-convex lens with a positive optical power, its first side S8 is a convex surface, and its second side S9 is a convex surface. The fifth lens L5 is a convex-concave lens with a negative optical power, its first side S10 is a convex surface, and its second side S11 is a concave surface. The sixth lens L6 is a convex-concave lens with a positive optical power, its first side S11 is a convex surface, and its second side S12 is a concave surface. The seventh lens L7 is a convex-convex lens with a positive optical power, its first side S13 is a convex surface, and its second side S14 is a convex surface. Among them, the fifth lens L5 and the sixth lens L6 are cemented to form a doublet lens; the first side S1 and the second side S2 of the first lens L1 have an inflection point.

[0300] The optical lens further includes a stop STO disposed between the third lens L3 and the fourth lens L4, which is beneficial to reasonably distribute the light height of the front and rear groups, shorten the total length of the optical system, and reduce the apertures of the front and rear lens groups. For example, the stop STO can be disposed at a position close to the first side S8 of the fourth lens L4 between the third lens L3 and the fourth lens L4.

[0301] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the seventh lens L7 and the imaging surface (IMA). The filter has, for example, a first side S15 and a second side S16, and the protective glass has, for example, a first side S17 and a second side S18.

[0302] When the optical lens is used for imaging, light from an object sequentially passes through the surfaces S1 to S18 and finally forms an image on the imaging surface; when the optical lens is used for projection, light from the image source surface sequentially passes through the surfaces S18 to S1 and finally projects onto a target object (not shown).

[0303] Table 27 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens of the optical lens of Embodiment 14. In this embodiment, the first side and the second sides S1-S6, S13, S14 of the first lens L1, the second lens L2, the third lens L3, and the seventh lens L7 are all aspherical surfaces. Table 28 shows the conic coefficient and the higher-order term coefficients that can be used for each aspherical mirror surface in this embodiment. Among them, each aspherical surface profile can be defined by formula (1) given in Embodiment 1 above.

[0304]

[0305] Table 27

[0306] Surface number k A4 A6 A8 A10 A12 A14 A16 S1 1.429 0.0028322 -0.00019447 -1.1901E-06 2.6609E-07 -6.6816E-09 7.7832E-11 -3.9926E-13 S2 7.3623 0.015518 -0.0018347 0.000085079 -2.1577E-06 4.5972E-08 -9.1924E-10 1.0064E-11 S3 -12.814 0.011991 -0.0024935 0.00022784 -0.000011569 2.9281E-07 -3.1896E-09 5.2085E-11 S4 -4.1494 0.012899 -0.004383 0.00088324 -0.00011677 0.000010315 -5.4559E-07 1.2415E-08 S5 5.5323 -0.0010768 -2.1621E-06 0.000011267 -7.3942E-06 1.7062E-06 -1.6564E-07 5.7248E-09 S6 1.0599 0.00039588 8.0763E-06 9.3185E-07 -1.6596E-08 5.5908E-10 1.5648E-11 2.2297E-12 S13 2.1757 0.00049925 -0.00001966 1.1026E-06 -5.4278E-08 1.54E-09 -2.5591E-11 1.439E-13 S14 -99 -0.0014373 -0.00010237 0.000012446 -5.5957E-07 1.3168E-08 -1.6271E-10 8.2551E-13

[0307] Table 28

[0308] Figure 47 shows the angular resolution curve of the optical lens according to Embodiment 14 of the present application. Among them, the abscissa represents the field angle of the optical lens increasing from 0° to the maximum half-field angle of 50°, and the ordinate represents the central resolution value of the angular resolution curve of the optical lens. From Figure 47 it can be seen that the central resolution value of the angular resolution curve of the optical lens gradually decreases as the field angle of the optical lens increases.

[0309] Example 15

[0310] The following refers to Figure 15 to describe the optical lens according to Embodiment 15 of the present application. Figure 15 shows a schematic structural diagram of the optical lens according to Embodiment 15 of the present application.

[0311] As Figure 15 shown, the optical lens sequentially includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, and an eighth lens L8 along the optical axis from the first side to the second side.

[0312] The first lens L1 is a convex-concave lens with a positive optical power, its first side S1 is a convex surface, and its second side S2 is a concave surface. The second lens L2 is a convex-concave lens with a negative optical power, its first side S3 is a convex surface, and its second side S4 is a concave surface. The third lens L3 is a concave-convex lens with a positive optical power, its first side S5 is a concave surface, and its second side S6 is a convex surface. The fourth lens L4 is a convex-convex lens with a positive optical power, its first side S8 is a convex surface, and its second side S9 is a convex surface. The fifth lens L5 is a concave-convex lens with a positive optical power, its first side S10 is a concave surface, and its second side S11 is a convex surface. The sixth lens L6 is a convex-concave lens with a negative optical power, its first side S12 is a convex surface, and its second side S13 is a concave surface. The seventh lens L7 is a convex-convex lens with a positive optical power, its first side S13 is a convex surface, and its second side S14 is a convex surface. The eighth lens L8 is a convex-concave lens with a positive optical power, its first side S15 is a convex surface, and its second side S16 is a concave surface. Among them, the sixth lens L6 and the seventh lens L7 are cemented to form a doublet lens; the first side S1 and the second side S2 of the first lens L1 and the second side S16 of the eighth lens L8 have an inflection point.

[0313] The optical lens further includes a diaphragm STO disposed between the third lens L3 and the fourth lens L4, which is beneficial to reasonably distribute the light heights of the front and rear groups, shorten the total length of the optical system, and reduce the apertures of the front and rear lens groups.

[0314] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the eighth lens L8 and the imaging surface (IMA). The filter, for example, has a first side S17 and a second side S18, and the protective glass, for example, has a first side S19 and a second side S20.

[0315] When the optical lens is used for imaging, the light from the object sequentially passes through the surfaces S1 to S20 and finally forms an image on the imaging surface; when the optical lens is used for projection, the light from the image source surface sequentially passes through the surfaces S20 to S1 and finally projects onto the target object (not shown).

[0316] Table 29 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens of the optical lens of Embodiment 15. In this embodiment, the first sides and the second sides S1-S6, S15-S16 of the first lens L1, the second lens L2, the third lens L3, and the eighth lens L8 are all aspherical surfaces. Table 30 shows the conic coefficient and the high-order term coefficient that can be used for each aspherical mirror surface in this embodiment. Among them, each aspherical surface type can be defined by the formula (1) given in Embodiment 1 above.

[0317]

[0318]

[0319] Table 29

[0320] Surface number k A4 A6 A8 A10 A12 A14 A16 S1 7.4155 2.3263E-03 -1.4329E-04 ########## 1.1353E-07 ########## 7.3455E-11 -7.568E-13 S2 80.3390 9.5327E-03 -9.9722E-04 3.7263E-05 ########## ########## 8.7655E-10 -8.525E-12 S3 -13.9460 7.5156E-03 -1.5138E-03 1.3066E-04 ########## 2.1202E-07 ########## 9.2072E-11 S4 -4.8436 1.7300E-02 -5.7486E-03 1.3698E-03 ########## 2.5224E-05 ########## 4.0512E-08 S5 5.3814 -6.7563E-04 5.1844E-05 ########## ########## 1.3983E-06 ########## 6.0022E-09 S6 1.2454 0.00030432 -0.000012079 6.9679E-06 -1.301E-06 1.4055E-07 -7.921E-09 1.815E-10 S15 2.3946 0.00027486 -0.000010349 1.112E-06 -8.065E-08 2.9042E-09 -5.301E-11 3.3692E-13 S16 -74.195 -0.000015139 -0.00027612 1.7795E-05 -5.287E-07 8.0469E-09 -5.926E-11 1.6287E-13

[0321] Table 30

[0322] Figure 48 shows the angular resolution curve of the optical lens according to Embodiment 15 of the present application. Among them, the abscissa represents that the field angle of the optical lens increases from 0° to the maximum semi-field angle of 50°, and the ordinate represents the central resolution value of the angular resolution curve of the optical lens. From Figure 48 it can be seen that the central resolution value of the angular resolution curve of the optical lens gradually decreases as the field angle of the optical lens increases.

[0323] Example 16

[0324] The following refers to Figure 16 to describe the optical lens according to Embodiment 16 of the present application. Figure 16 shows a schematic structural diagram of the optical lens according to Embodiment 16 of the present application.

[0325] As Figure 16 shown, the optical lens sequentially includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, and an eighth lens L8 along the optical axis from the first side to the second side.

[0326] The first lens L1 is a convex-concave lens with a positive optical power. Its first side S1 is a convex surface, and its second side S2 is a concave surface. The second lens L2 is a convex-concave lens with a negative optical power. Its first side S3 is a convex surface, and its second side S4 is a concave surface. The third lens L3 is a concave-convex lens with a positive optical power. Its first side S5 is a concave surface, and its second side S6 is a convex surface. The fourth lens L4 is a convex-convex lens with a positive optical power. Its first side S8 is a convex surface, and its second side S9 is a convex surface. The fifth lens L5 is a concave-convex lens with a positive optical power. Its first side S10 is a concave surface, and its second side S11 is a convex surface. The sixth lens L6 is a convex-concave lens with a negative optical power. Its first side S12 is a convex surface, and its second side S13 is a concave surface. The seventh lens L7 is a convex-convex lens with a positive optical power. Its first side S13 is a convex surface, and its second side S14 is a convex surface. The eighth lens L8 is a convex-concave lens with a positive optical power. Its first side S15 is a convex surface, and its second side S16 is a concave surface. Among them, the sixth lens L6 and the seventh lens L7 are cemented to form a doublet lens; the first side S1 and the second side S2 of the first lens L1 and the second side S16 of the eighth lens L8 have an inflection point.

[0327] The optical lens further includes a stop STO disposed between the third lens L3 and the fourth lens L4, which is conducive to reasonably distributing the light heights of the front and rear groups, shortening the total length of the optical system, and reducing the apertures of the front and rear lens groups.

[0328] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the eighth lens L8 and the imaging surface (IMA). The filter, for example, has a first side S17 and a second side S18, and the protective glass, for example, has a first side S19 and a second side S20.

[0329] When the optical lens is used for imaging, light from an object sequentially passes through the surfaces S1 to S20 and finally forms an image on the imaging surface; when the optical lens is used for projection, light from the image source surface sequentially passes through the surfaces S20 to S1 and is finally projected onto a target object (not shown).

[0330] Table 31 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens of the optical lens according to Embodiment 16. In this embodiment, the first sides and second sides S1-S6, S15-S16 of the first lens L1, the second lens L2, the third lens L3, and the eighth lens L8 are all aspherical surfaces. Table 32 shows the conic coefficients and higher-order term coefficients that can be used for each aspherical mirror surface in this embodiment. Among them, each aspherical surface profile can be defined by the formula (1) given in Embodiment 1 above.

[0331]

[0332]

[0333] Table 31

[0334] Surface number k A4 A6 A8 A10 A12 A14 A16 S1 7.423 0.0023333 -0.00014372 -1.039E-07 1.133E-07 -3.364E-09 7.3676E-11 -7.591E-13 S2 80.42 0.0095613 -0.0010002 3.7375E-05 -2.397E-07 -2.614E-08 8.7919E-10 -8.55E-12 S3 -13.96 0.0075382 -0.0015183 0.00013105 -6.644E-06 2.1266E-07 -5.069E-09 9.2349E-11 S4 -4.8484 0.017352 -0.0057543 0.0013712 -0.0002294 2.5249E-05 -1.578E-06 4.0552E-08 S5 5.3653 -0.00067158 0.000051533 -3.7E-06 -4.18E-06 1.3899E-06 -1.593E-07 5.9662E-09 S6 1.2404 0.00030311 -0.00001203 6.9053E-06 -1.296E-06 1.3999E-07 -7.85E-09 1.8078E-10 S15 2.3898 0.00027376 -0.000010308 1.1075E-06 -8.033E-08 2.8926E-09 -5.28E-11 3.3557E-13 S16 -74.046 -0.000015078 -0.00027502 1.7724E-05 -5.266E-07 8.0147E-09 -5.902E-11 1.6222E-13

[0335] Table 32

[0336] Figure 49 shows the angular resolution curve of the optical lens according to Embodiment 16 of the present application. Among them, the abscissa represents the field angle of the optical lens increasing from 0° to the maximum half-field angle of 50°, and the ordinate represents the central resolution value of the angular resolution curve of the optical lens. From Figure 49 it can be seen that the central resolution value of the angular resolution curve of the optical lens gradually decreases as the field angle of the optical lens increases.

[0337] Example 17

[0338] The following refers to Figure 17 to describe the optical lens according to Embodiment 17 of the present application. Figure 17 shows a schematic structural diagram of the optical lens according to Embodiment 17 of the present application.

[0339] As shown Figure 17 in the figure, the optical lens sequentially includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, and an eighth lens L8 along the optical axis from the first side to the second side.

[0340] The first lens L1 is a convex-concave lens with a positive optical power, its first side S1 is a convex surface, and its second side S2 is a concave surface. The second lens L2 is a convex-concave lens with a negative optical power, its first side S3 is a convex surface, and its second side S4 is a concave surface. The third lens L3 is a concave-convex lens with a positive optical power, its first side S5 is a concave surface, and its second side S6 is a convex surface. The fourth lens L4 is a concave-convex lens with a positive optical power, its first side S8 is a concave surface, and its second side S9 is a convex surface. The fifth lens L5 is a concave-convex lens with a positive optical power, its first side S10 is a concave surface, and its second side S11 is a convex surface. The sixth lens L6 is a convex-concave lens with a negative optical power, its first side S12 is a convex surface, and its second side S13 is a concave surface. The seventh lens L7 is a convex-convex lens with a positive optical power, its first side S13 is a convex surface, and its second side S14 is a convex surface. The eighth lens L8 is a convex-concave lens with a positive optical power, its first side S15 is a convex surface, and its second side S16 is a concave surface. Among them, the sixth lens L6 and the seventh lens L7 are cemented to form a doublet lens; the first side S1 and the second side S2 of the first lens L1 and the second side S16 of the eighth lens L8 have an inflection point.

[0341] The optical lens further includes a stop STO disposed between the third lens L3 and the fourth lens L4, which is beneficial to reasonably distribute the light height of the front and rear groups, shorten the total length of the optical system, and reduce the aperture of the front and rear lens groups.

[0342] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the eighth lens L8 and the imaging surface (IMA). The filter has, for example, a first side S17 and a second side S18, and the protective glass has, for example, a first side S19 and a second side S20.

[0343] When the optical lens is used for imaging, the light from the object sequentially passes through each surface S1 to S20 and finally forms an image on the imaging surface; when the optical lens is used for projection, the light from the image source surface sequentially passes through each surface S20 to S1 and finally projects onto the target object (not shown).

[0344] Table 33 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens of the optical lens of Embodiment 17. In this embodiment, the first and second sides S1-S6, S15-S16 of the first lens L1, the second lens L2, the third lens L3, and the eighth lens L8 are all aspherical surfaces. Table 34 shows the conic coefficient and high-order term coefficient that can be used for each aspherical mirror surface in this embodiment. Among them, each aspherical surface type can be defined by formula (1) given in Embodiment 1 above.

[0345]

[0346] Table 33

[0347]

[0348]

[0349] Table 34

[0350] Figure 50 shows the angular resolution curve of the optical lens according to Embodiment 17 of the present application. Among them, the abscissa represents the field angle of the optical lens increasing from 0° to the maximum semi-field angle of 50°, and the ordinate represents the central resolution value of the angular resolution curve of the optical lens. From Figure 50 it can be seen that the central resolution value of the angular resolution curve of the optical lens gradually decreases as the field angle of the optical lens increases.

[0351] Example 18

[0352] The following refers to Figure 18 to describe the optical lens according to Embodiment 18 of the present application. Figure 18 shows a schematic structural diagram of the optical lens according to Embodiment 18 of the present application.

[0353] As Figure 18 shown, the optical lens sequentially includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, and an eighth lens L8 along the optical axis from the first side to the second side.

[0354] The first lens L1 is a convex-concave lens with a positive optical power. Its first side S1 is a convex surface, and its second side S2 is a concave surface. The second lens L2 is a convex-concave lens with a negative optical power. Its first side S3 is a convex surface, and its second side S4 is a concave surface. The third lens L3 is a concave-convex lens with a positive optical power. Its first side S5 is a concave surface, and its second side S6 is a convex surface. The fourth lens L4 is a concave-convex lens with a positive optical power. Its first side S8 is a concave surface, and its second side S9 is a convex surface. The fifth lens L5 is a concave-convex lens with a positive optical power. Its first side S10 is a concave surface, and its second side S11 is a convex surface. The sixth lens L6 is a convex-concave lens with a negative optical power. Its first side S12 is a convex surface, and its second side S13 is a concave surface. The seventh lens L7 is a convex-convex lens with a positive optical power. Its first side S13 is a convex surface, and its second side S14 is a convex surface. The eighth lens L8 is a convex-concave lens with a positive optical power. Its first side S15 is a convex surface, and its second side S16 is a concave surface. Among them, the sixth lens L6 and the seventh lens L7 are cemented to form a doublet lens; the first side S1 and the second side S2 of the first lens L1 and the second side S16 of the eighth lens L8 have an inflection point.

[0355] The optical lens further includes a diaphragm STO disposed between the third lens L3 and the fourth lens L4, which is beneficial to reasonably distribute the heights of the front and rear group of light rays, shorten the total length of the optical system, and reduce the apertures of the front and rear lens groups.

[0356] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the eighth lens L8 and the imaging surface (IMA). The filter has, for example, a first side S17 and a second side S18, and the protective glass has, for example, a first side S19 and a second side S20.

[0357] When the optical lens is used for imaging, the light from the object sequentially passes through the surfaces S1 to S20 and finally forms an image on the imaging surface; when the optical lens is used for projection, the light from the image source surface sequentially passes through the surfaces S20 to S1 and finally projects onto the target object (not shown).

[0358] Table 35 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens of the optical lens of Embodiment 18. In this embodiment, the first sides and the second sides S1-S6, S15-S16 of the first lens L1, the second lens L2, the third lens L3, and the eighth lens L8 are all aspherical surfaces. Table 36 shows the conic coefficient and the high-order term coefficient that can be used for each aspherical mirror surface in this embodiment. Among them, each aspherical surface type can be defined by the formula (1) given in Embodiment 1 above.

[0359]

[0360] Table 35

[0361] Surface number k A4 A6 A8 A10 A12 A14 A16 S1 11.096 0.0023958 -0.00014844 -1.411E-06 2.8472E-07 -1.256E-08 3.0312E-10 -2.88E-12 S2 99 0.010379 -0.0011519 5.6852E-05 -1.907E-06 5.4535E-08 -1.055E-09 9.476E-12 S3 -11.856 0.0078455 -0.0016514 0.00015508 -9.64E-06 4.4237E-07 -1.574E-08 3.3033E-10 S4 -4.2937 0.015101 -0.0048502 0.0011021 -0.0001766 1.8893E-05 -1.162E-06 2.9511E-08 S5 5.451 -0.0007358 0.000099243 -2.454E-05 2.6641E-06 2.1185E-07 -5.612E-08 2.4491E-09 S6 1.1109 0.00042059 -9.6929E-06 7.279E-06 -1.356E-06 1.4892E-07 -8.526E-09 1.993E-10 S15 3.2622 0.00032014 -0.000010556 1.1663E-06 -8.769E-08 3.245E-09 -6.099E-11 4.0067E-13 S16 -88.303 -0.00025351 -0.00026747 0.00001889 -6.244E-07 1.1075E-08 -1.029E-10 3.9758E-13

[0362] Table 36

[0363] Figure 51 shows the angular resolution curve of the optical lens according to Embodiment 18 of the present application. Among them, the abscissa represents that the field of view angle of the optical lens increases from 0° to the maximum semi-field angle of 50°, and the ordinate represents the central resolution value of the angular resolution curve of the optical lens. From Figure 51 it can be seen that the central resolution value of the angular resolution curve of the optical lens gradually decreases as the field of view angle of the optical lens increases.

[0364] Example 19

[0365] The following refers to Figure 19 to describe the optical lens according to Embodiment 19 of the present application. Figure 19 shows a schematic structural diagram of the optical lens according to Embodiment 19 of the present application.

[0366] As Figure 19 shown, the optical lens sequentially includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, and an eighth lens L8 along the optical axis from the first side to the second side.

[0367] The first lens L1 is a convex-convex lens with a positive optical power, its first side S1 is a convex surface, and its second side S2 is a convex surface. The second lens L2 is a convex-concave lens with a negative optical power, its first side S3 is a convex surface, and its second side S4 is a concave surface. The third lens L3 is a concave-convex lens with a positive optical power, its first side S5 is a concave surface, and its second side S6 is a convex surface. The fourth lens L4 is a convex-convex lens with a positive optical power, its first side S8 is a convex surface, and its second side S9 is a convex surface. The fifth lens L5 is a convex-convex lens with a positive optical power, its first side S10 is a convex surface, and its second side S11 is a convex surface. The sixth lens L6 is a concave-convex lens with a negative optical power, its first side S11 is a concave surface, and its second side S12 is a convex surface. The seventh lens L7 is a convex-concave lens with a positive optical power, its first side S13 is a convex surface, and its second side S14 is a concave surface. The eighth lens L8 is a convex-concave lens with a positive optical power, its first side S15 is a convex surface, and its second side S16 is a concave surface. Among them, the fifth lens L5 and the sixth lens L6 are cemented to form a doublet lens; the first side S1 of the first lens L1, the first side S3 of the second lens L2, and the second side S16 of the eighth lens L8 have an inflection point.

[0368] The optical lens further includes a diaphragm STO disposed between the third lens L3 and the fourth lens L4, which is beneficial to reasonably distribute the heights of the front and rear group of light rays, shorten the total length of the optical system, and reduce the apertures of the front and rear lens groups.

[0369] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the eighth lens L8 and the imaging surface (IMA). The filter, for example, has a first side S17 and a second side S18, and the protective glass, for example, has a first side S19 and a second side S20.

[0370] When the optical lens is used for imaging, the light from the object sequentially passes through the surfaces S1 to S20 and finally forms an image on the imaging surface; when the optical lens is used for projection, the light from the image source surface sequentially passes through the surfaces S20 to S1 and finally projects onto the target object (not shown).

[0371] Table 37 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens of the optical lens of Embodiment 19. In this embodiment, the first sides and the second sides S1-S6, S15-S16 of the first lens L1, the second lens L2, the third lens L3, and the eighth lens L8 are all aspherical surfaces. Table 38 shows the conic coefficients and higher-order term coefficients that can be used for each aspherical mirror surface in this embodiment. Among them, each aspherical surface profile can be defined by the formula (1) given in Embodiment 1 above.

[0372]

[0373]

[0374] Table 37

[0375] Surface number k A4 A6 A8 A10 A12 A14 A16 S1 29.188 0.0023549 -0.00013686 -2.546E-06 4.275E-07 -1.959E-08 4.4585E-10 -3.911E-12 S2 -95.728 0.011703 -0.0014581 7.3813E-05 -1.247E-06 -3.974E-08 2.0932E-09 -2.51E-11 S3 -15.307 0.0066879 -0.0015091 7.0221E-05 5.5371E-06 -8.237E-07 3.8699E-08 -6.619E-10 S4 -4.1068 0.0118 -0.0032932 0.00058607 -7.095E-05 6.1228E-06 -3.309E-07 7.6657E-09 S5 -2.7445 -0.00010576 0.000026462 2.5305E-05 -1.522E-05 3.2691E-06 -3.199E-07 1.1514E-08 S6 1.8765 0.00010376 -0.000016806 4.8174E-06 -8.225E-07 7.5055E-08 -3.571E-09 6.8156E-11 S15 -0.25948 -0.000067761 -9.1927E-06 8.359E-07 -4.542E-08 1.2847E-09 -1.883E-11 9.7554E-14 S16 1.5386 -0.0012431 -0.00010878 2.1472E-06 2.8662E-07 -1.593E-08 3.124E-10 -2.151E-12

[0376] Table 38

[0377] Figure 52 shows the angular resolution curve of the optical lens according to Embodiment 19 of the present application. Among them, the abscissa represents the field angle of the optical lens increasing from 0° to the maximum half-field angle of 50°, and the ordinate represents the central resolution value of the angular resolution curve of the optical lens. From Figure 52 It can be seen that the central resolution value of the angular resolution curve of the optical lens gradually decreases as the field angle of the optical lens increases.

[0378] Example 20

[0379] The following refers to Figure 20 to describe the optical lens according to Embodiment 20 of the present application. Figure 20 shows a schematic structural diagram of the optical lens according to Embodiment 20 of the present application.

[0380] As shown Figure 20 in the figure, the optical lens sequentially includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, and an eighth lens L8 along the optical axis from the first side to the second side.

[0381] The first lens L1 is a convex-convex lens with a positive optical power, its first side S1 is a convex surface, and its second side S2 is a convex surface. The second lens L2 is a convex-concave lens with a negative optical power, its first side S3 is a convex surface, and its second side S4 is a concave surface. The third lens L3 is a concave-convex lens with a positive optical power, its first side S5 is a concave surface, and its second side S6 is a convex surface. The fourth lens L4 is a convex-convex lens with a positive optical power, its first side S8 is a convex surface, and its second side S9 is a convex surface. The fifth lens L5 is a convex-convex lens with a positive optical power, its first side S10 is a convex surface, and its second side S11 is a convex surface. The sixth lens L6 is a concave-convex lens with a negative optical power, its first side S11 is a concave surface, and its second side S12 is a convex surface. The seventh lens L7 is a convex-concave lens with a positive optical power, its first side S13 is a convex surface, and its second side S14 is a concave surface. The eighth lens L8 is a convex-concave lens with a positive optical power, its first side S15 is a convex surface, and its second side S16 is a concave surface. Among them, the fifth lens L5 and the sixth lens L6 are cemented to form a doublet lens; the first side S1 of the first lens L1, the first side S3 of the second lens L2, and the second side S16 of the eighth lens L8 have an inflection point.

[0382] The optical lens further includes a stop STO disposed between the third lens L3 and the fourth lens L4, which is beneficial to reasonably distribute the height of the front and rear group of light rays, shorten the total length of the optical system, and reduce the aperture of the front and rear lens groups.

[0383] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the eighth lens L8 and the imaging surface (IMA). The filter has, for example, a first side S17 and a second side S18, and the protective glass has, for example, a first side S19 and a second side S20.

[0384] When the optical lens is used for imaging, the light from the object sequentially passes through each surface S1 to S20 and finally forms an image on the imaging surface; when the optical lens is used for projection, the light from the image source surface sequentially passes through each surface S20 to S1 and finally projects onto the target object (not shown).

[0385] Table 39 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens of the optical lens according to Embodiment 20. In this embodiment, the first side and the second sides S1-S6, S15-S16 of the first lens L1, the second lens L2, the third lens L3, and the eighth lens L8 are all aspherical surfaces. Table 40 shows the conic coefficients and higher-order term coefficients that can be used for each aspherical mirror surface in this embodiment. Among them, each aspherical surface type can be defined by formula (1) given in Embodiment 1 above.

[0386]

[0387]

[0388] Table 39

[0389] Surface number k A4 A6 A8 A10 A12 A14 A16 S1 29.247 0.0023596 -0.00013713 -2.551E-06 4.2836E-07 -1.963E-08 4.4675E-10 -3.919E-12 S2 -95.92 0.011727 -0.001461 7.3961E-05 -1.249E-06 -3.982E-08 2.0974E-09 -2.515E-11 S3 -15.338 0.0067013 -0.0015121 7.0362E-05 5.5482E-06 -8.253E-07 3.8777E-08 -6.633E-10 S4 -4.115 0.011824 -0.0032998 0.00058724 -7.109E-05 6.1351E-06 -3.316E-07 7.6811E-09 S5 -2.739 -0.00010533 0.000026356 2.5204E-05 -1.516E-05 3.2561E-06 -3.186E-07 1.1468E-08 S6 1.869 0.00010334 -0.000016739 4.7981E-06 -8.193E-07 7.4755E-08 -3.557E-09 6.7884E-11 S15 -0.25844 -0.00006749 -9.1559E-06 8.3256E-07 -4.524E-08 1.2796E-09 -1.876E-11 9.7164E-14 S16 1.5232 -0.0012381 -0.00010834 2.1386E-06 2.8547E-07 -1.587E-08 3.1115E-10 -2.142E-12

[0390] Table 40

[0391] Figure 53 shows the angular resolution curve of the optical lens according to Embodiment 20 of the present application. Among them, the abscissa represents the field angle of the optical lens increasing from 0° to the maximum half-field angle of 50°, and the ordinate represents the central resolution value of the angular resolution curve of the optical lens. It can be seen that Figure 53 the central resolution value of the angular resolution curve of the optical lens gradually decreases as the field angle of the optical lens increases.

[0392] Example 21

[0393] The following refers to Figure 21 to describe the optical lens according to Embodiment 21 of the present application. Figure 21 shows a schematic structural diagram of the optical lens according to Embodiment 21 of the present application.

[0394] As Figure 21 shown, the optical lens sequentially includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, and an eighth lens L8 along the optical axis from the first side to the second side.

[0395] The first lens L1 is a convex-convex lens with a positive optical power. Its first surface S1 is a convex surface, and its second surface S2 is a convex surface. The second lens L2 is a convex-concave lens with a negative optical power. Its first surface S3 is a convex surface, and its second surface S4 is a concave surface. The third lens L3 is a concave-convex lens with a positive optical power. Its first surface S5 is a concave surface, and its second surface S6 is a convex surface. The fourth lens L4 is a convex-concave lens with a positive optical power. Its first surface S8 is a convex surface, and its second surface S9 is a concave surface. The fifth lens L5 is a convex-convex lens with a positive optical power. Its first surface S10 is a convex surface, and its second surface S11 is a convex surface. The sixth lens L6 is a convex-concave lens with a negative optical power. Its first surface S12 is a convex surface, and its second surface S13 is a concave surface. The seventh lens L7 is a convex-convex lens with a positive optical power. Its first surface S13 is a convex surface, and its second surface S14 is a convex surface. The eighth lens L8 is a convex-concave lens with a positive optical power. Its first surface S15 is a convex surface, and its second surface S16 is a concave surface. Among them, the sixth lens L6 and the seventh lens L7 are cemented to form a doublet lens; the first surface S1 of the first lens L1 and the second surface S16 of the eighth lens L8 have an inflection point.

[0396] The optical lens further includes a stop STO disposed between the third lens L3 and the fourth lens L4, which is beneficial to reasonably distribute the heights of the front and rear group of light rays, shorten the total length of the optical system, and reduce the apertures of the front and rear lens groups.

[0397] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the eighth lens L8 and the imaging surface (IMA). The filter has, for example, a first surface S17 and a second surface S18, and the protective glass has, for example, a first surface S19 and a second surface S20.

[0398] When the optical lens is used for imaging, the light from the object sequentially passes through the surfaces S1 to S20 and finally forms an image on the imaging surface; when the optical lens is used for projection, the light from the image source surface sequentially passes through the surfaces S20 to S1 and finally projects onto the target object (not shown).

[0399] Table 41 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens of the optical lens of Embodiment 21. In this embodiment, the first surfaces and the second surfaces S1-S6, S15-S16 of the first lens L1, the second lens L2, the third lens L3, and the eighth lens L8 are all aspherical surfaces. Table 42 shows the conic coefficient and the high-order term coefficient that can be used for each aspherical mirror surface in this embodiment. Among them, each aspherical surface type can be defined by the formula (1) given in the above Embodiment 1.

[0400]

[0401]

[0402] Table 41

[0403] Surface number k A4 A6 A8 A10 A12 A14 A16 S1 13.455 0.0028545 -0.00023718 4.1882E-06 3.616E-08 -4.738E-09 1.7849E-10 -2.216E-12 S2 98.802 0.012873 -0.0018575 0.00015457 -9.592E-06 3.9833E-07 -9.044E-09 8.4137E-11 S3 -11.815 0.010209 -0.0026429 0.00031472 -2.306E-05 1.025E-06 -2.654E-08 3.628E-10 S4 -4.063 0.014342 -0.0049319 0.0010639 -0.0001515 1.3976E-05 -7.463E-07 1.6855E-08 S5 5.9373 -0.00043567 0.00011022 -3.726E-05 6.5019E-06 -4.062E-07 -6.919E-09 9.4119E-10 S6 1.2422 0.00027372 -4.7995E-06 4.1647E-06 -6.625E-07 6.4806E-08 -3.313E-09 7.1189E-11 S15 1.1626 0.00022649 -0.0000162 1.9201E-06 -1.481E-07 5.7271E-09 -1.131E-10 7.7819E-13 S16 -67.042 -0.00035275 -0.00025606 0.00001737 -5.4E-07 8.5505E-09 -6.576E-11 1.943E-13

[0404] Table 42

[0405] Figure 54 shows the angular resolution curve of the optical lens according to Embodiment 21 of the present application. Among them, the abscissa represents the field of view angle of the optical lens increasing from 0° to the maximum semi-field angle of 50°, and the ordinate represents the central resolution value of the angular resolution curve of the optical lens. From Figure 54 it can be seen that the central resolution value of the angular resolution curve of the optical lens gradually decreases as the field of view angle of the optical lens increases.

[0406] Example 22

[0407] The following refers to Figure 22 to describe the optical lens according to Embodiment 22 of the present application. Figure 22 shows a schematic structural diagram of the optical lens according to Embodiment 22 of the present application.

[0408] As Figure 22 shown, the optical lens sequentially includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, and an eighth lens L8 along the optical axis from the first side to the second side.

[0409] The first lens L1 is a convex-convex lens with a positive optical power, its first side S1 is a convex surface, and its second side S2 is a convex surface. The second lens L2 is a convex-concave lens with a negative optical power, its first side S3 is a convex surface, and its second side S4 is a concave surface. The third lens L3 is a concave-convex lens with a positive optical power, its first side S5 is a concave surface, and its second side S6 is a convex surface. The fourth lens L4 is a convex-concave lens with a positive optical power, its first side S8 is a convex surface, and its second side S9 is a concave surface. The fifth lens L5 is a convex-convex lens with a positive optical power, its first side S10 is a convex surface, and its second side S11 is a convex surface. The sixth lens L6 is a convex-concave lens with a negative optical power, its first side S12 is a convex surface, and its second side S13 is a concave surface. The seventh lens L7 is a convex-convex lens with a positive optical power, its first side S13 is a convex surface, and its second side S14 is a convex surface. The eighth lens L8 is a convex-concave lens with a positive optical power, its first side S15 is a convex surface, and its second side S16 is a concave surface. Among them, the sixth lens L6 and the seventh lens L7 are cemented to form a doublet lens; the first side S1 of the first lens L1 and the second side S16 of the eighth lens L8 have an inflection point.

[0410] The optical lens further includes a diaphragm STO disposed between the third lens L3 and the fourth lens L4, which is beneficial to reasonably distribute the heights of the front and rear group of light rays, shorten the total length of the optical system, and reduce the apertures of the front and rear lens groups.

[0411] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the eighth lens L8 and the imaging surface (IMA). The filter, for example, has a first side S17 and a second side S18, and the protective glass, for example, has a first side S19 and a second side S20.

[0412] When the optical lens is used for imaging, the light from an object sequentially passes through the surfaces S1 to S20 and finally forms an image on the imaging surface; when the optical lens is used for projection, the light from the image source surface sequentially passes through the surfaces S20 to S1 and finally projects onto a target object (not shown).

[0413] Table 43 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens of the optical lens of Embodiment 22. In this embodiment, the first sides and the second sides S1-S6, S15-S16 of the first lens L1, the second lens L2, the third lens L3, and the eighth lens L8 are all aspherical surfaces. Table 44 shows the conic coefficient and the high-order term coefficient that can be used for each aspherical mirror surface in this embodiment. Among them, each aspherical surface type can be defined by the formula (1) given in Embodiment 1 above.

[0414]

[0415] Table 43

[0416]

[0417]

[0418] Table 44

[0419] Figure 55 shows the angular resolution curve of the optical lens according to Embodiment 22 of the present application. Among them, the abscissa represents the field angle of the optical lens increasing from 0° to the maximum half-field angle of 50°, and the ordinate represents the central resolution value of the angular resolution curve of the optical lens. As Figure 55 can be seen, the central resolution value of the angular resolution curve of the optical lens gradually decreases as the field angle of the optical lens increases.

[0420] Example 23

[0421] The following refers to Figure 23 to describe the optical lens according to Embodiment 23 of the present application. Figure 23 shows a schematic structural diagram of the optical lens according to Embodiment 23 of the present application.

[0422] As shown Figure 23 in the figure, the optical lens sequentially includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, and an eighth lens L8 along the optical axis from the first side to the second side.

[0423] The first lens L1 is a convex-concave lens with a positive optical power, its first side S1 is a convex surface, and its second side S2 is a concave surface. The second lens L2 is a convex-concave lens with a negative optical power, its first side S3 is a convex surface, and its second side S4 is a concave surface. The third lens L3 is a concave-convex lens with a positive optical power, its first side S5 is a concave surface, and its second side S6 is a convex surface. The fourth lens L4 is a convex-convex lens with a positive optical power, its first side S8 is a convex surface, and its second side S9 is a convex surface. The fifth lens L5 is a concave-convex lens with a positive optical power, its first side S10 is a concave surface, and its second side S11 is a convex surface. The sixth lens L6 is a convex-convex lens with a positive optical power, its first side S12 is a convex surface, and its second side S13 is a convex surface. The seventh lens L7 is a concave-convex lens with a negative optical power, its first side S13 is a concave surface, and its second side S14 is a convex surface. The eighth lens L8 is a convex-concave lens with a positive optical power, its first side S15 is a convex surface, and its second side S16 is a concave surface. Among them, the sixth lens L6 and the seventh lens L7 are cemented to form a doublet lens; the first side S1 and the second side S2 of the first lens L1 and the second side S16 of the eighth lens L8 have an inflection point.

[0424] The optical lens further includes a stop STO disposed between the third lens L3 and the fourth lens L4, which is beneficial to reasonably distribute the light height of the front and rear groups, shorten the total length of the optical system, and reduce the aperture of the front and rear lens groups.

[0425] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the eighth lens L8 and the imaging surface (IMA). The filter has, for example, a first side S17 and a second side S18, and the protective glass has, for example, a first side S19 and a second side S20.

[0426] When the optical lens is used for imaging, the light from the object sequentially passes through the surfaces S1 to S20 and finally forms an image on the imaging surface; when the optical lens is used for projection, the light from the image source surface sequentially passes through the surfaces S20 to S1 and finally projects onto the target object (not shown).

[0427] Table 45 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens of the optical lens of Example 23. In this embodiment, the first side and the second sides S1-S6, S15-S16 of the first lens L1, the second lens L2, the third lens L3, and the eighth lens L8 are all aspherical surfaces. Table 46 shows the conic coefficient and the high-order term coefficients that can be used for each aspherical mirror surface in this embodiment. Among them, each aspherical surface profile can be defined by the formula (1) given in the above Example 1.

[0428]

[0429] Table 45

[0430] Surface number k A4 A6 A8 A10 A12 A14 A16 S1 7.2131 0.0025788 -0.00017641 -1.287E-07 2.4407E-07 -1.289E-08 3.6129E-10 -3.789E-12 S2 98.802 0.012488 -0.0016649 9.8378E-05 -3.143E-06 4.6845E-08 5.0686E-11 -5.993E-12 S3 -11.129 0.0090725 -0.0021465 0.00016765 -2.509E-06 -4.731E-07 3.1282E-08 -6.006E-10 S4 -3.8554 0.015786 -0.0049658 0.00099216 -0.0001304 1.1466E-05 -6.048E-07 1.365E-08 S5 -0.29383 -0.00081976 0.000051945 -7.797E-06 -4.528E-06 1.6649E-06 -2.042E-07 8.4093E-09 S6 1.3795 0.00022049 -0.000010901 5.1524E-06 -9.245E-07 9.6455E-08 -5.352E-09 1.2123E-10 S15 1.1464 0.0004285 -0.000024843 2.6634E-06 -2.026E-07 8.0224E-09 -1.649E-10 1.2025E-12 S16 -99 -0.0005003 -0.00024796 1.7857E-05 -5.89E-07 9.9115E-09 -8.133E-11 2.5642E-13

[0431] Table 46

[0432] Figure 56 shows the angular resolution curve of the optical lens according to Embodiment 23 of the present application. Among them, the abscissa represents the field angle of the optical lens increasing from 0° to the maximum half-field angle of 50°, and the ordinate represents the central resolution value of the angular resolution curve of the optical lens. From Figure 56 it can be seen that the central resolution value of the angular resolution curve of the optical lens gradually decreases as the field angle of the optical lens increases.

[0433] Example 24

[0434] The following refers to Figure 24 to describe the optical lens according to Embodiment 24 of the present application. Figure 24 shows a schematic structural diagram of the optical lens according to Embodiment 24 of the present application.

[0435] As Figure 24 shown, the optical lens sequentially includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, and an eighth lens L8 along the optical axis from the first side to the second side.

[0436] The first lens L1 is a convex-concave lens with a positive optical power. Its first side S1 is a convex surface, and its second side S2 is a concave surface. The second lens L2 is a convex-concave lens with a negative optical power. Its first side S3 is a convex surface, and its second side S4 is a concave surface. The third lens L3 is a concave-convex lens with a positive optical power. Its first side S5 is a concave surface, and its second side S6 is a convex surface. The fourth lens L4 is a convex-convex lens with a positive optical power. Its first side S8 is a convex surface, and its second side S9 is a convex surface. The fifth lens L5 is a concave-convex lens with a positive optical power. Its first side S10 is a concave surface, and its second side S11 is a convex surface. The sixth lens L6 is a convex-convex lens with a positive optical power. Its first side S12 is a convex surface, and its second side S13 is a convex surface. The seventh lens L7 is a concave-convex lens with a negative optical power. Its first side S13 is a concave surface, and its second side S14 is a convex surface. The eighth lens L8 is a convex-concave lens with a positive optical power. Its first side S15 is a convex surface, and its second side S16 is a concave surface. Among them, the sixth lens L6 and the seventh lens L7 are cemented to form a doublet lens; the first side S1 and the second side S2 of the first lens L1 and the second side S16 of the eighth lens L8 have an inflection point.

[0437] The optical lens further includes a stop STO disposed between the third lens L3 and the fourth lens L4, which is beneficial to reasonably distribute the ray heights of the front and rear groups, shorten the total length of the optical system, and reduce the apertures of the front and rear lens groups.

[0438] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the eighth lens L8 and the imaging surface (IMA). The filter, for example, has a first side S17 and a second side S18, and the protective glass, for example, has a first side S19 and a second side S20.

[0439] When the optical lens is used for imaging, the light from the object sequentially passes through the surfaces S1 to S20 and finally forms an image on the imaging surface; when the optical lens is used for projection, the light from the image source surface sequentially passes through the surfaces S20 to S1 and finally projects onto the target object (not shown).

[0440] Table 47 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens of the optical lens of Embodiment 24. In this embodiment, the first sides and the second sides S1-S6, S15-S16 of the first lens L1, the second lens L2, the third lens L3, and the eighth lens L8 are all aspherical surfaces. Table 48 shows the conic coefficients and high-order term coefficients of the aspherical surfaces that can be used in this embodiment. Among them, each aspherical surface type can be defined by the formula (1) given in the above Embodiment 1.

[0441]

[0442]

[0443] Table 47

[0444] Surface number k A4 A6 A8 A10 A12 A14 A16 S1 7.2275 0.002584 -0.00017676 -1.289E-07 2.4456E-07 -1.291E-08 3.6202E-10 -3.796E-12 S2 99 0.012513 -0.0016683 9.8575E-05 -3.149E-06 4.6939E-08 5.0788E-11 -6.005E-12 S3 -11.151 0.0090907 -0.0021508 0.00016799 -2.514E-06 -4.741E-07 3.1345E-08 -6.018E-10 S4 -3.8631 0.015817 -0.0049658 0.00099216 -0.0001304 1.1466E-05 -6.048E-07 1.365E-08 S5 -0.29266 -0.00081648 0.000051737 -7.766E-06 -4.51E-06 1.6582E-06 -2.034E-07 8.3757E-09 S6 1.3739 0.00021961 -0.000010857 5.1318E-06 -9.208E-07 9.6069E-08 -5.33E-09 1.2075E-10 S15 1.1418 0.00042678 -0.000024744 2.6527E-06 -2.018E-07 7.9903E-09 -1.642E-10 1.1977E-12 S16 -98.604 -0.0004983 -0.00024697 1.7785E-05 -5.866E-07 9.8719E-09 -8.101E-11 2.554E-13

[0445] Table 48

[0446] Figure 57 shows the angular resolution curve of the optical lens according to Embodiment 24 of the present application. Among them, the abscissa represents the field angle of the optical lens increasing from 0° to the maximum half-field angle of 50°, and the ordinate represents the central resolution value of the angular resolution curve of the optical lens. From Figure 57 it can be seen that the central resolution value of the angular resolution curve of the optical lens gradually decreases as the field angle of the optical lens increases.

[0447] Example 25

[0448] The following refers to Figure 25 to describe the optical lens according to Embodiment 25 of the present application. Figure 25 shows a schematic structural diagram of the optical lens according to Embodiment 25 of the present application.

[0449] As Figure 25 shown, the optical lens sequentially includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, and an eighth lens L8 along the optical axis from the first side to the second side.

[0450] The first lens L1 is a convex-convex lens with a positive optical power, its first side S1 is a convex surface, and its second side S2 is a convex surface. The second lens L2 is a convex-concave lens with a negative optical power, its first side S3 is a convex surface, and its second side S4 is a concave surface. The third lens L3 is a concave-convex lens with a positive optical power, its first side S5 is a concave surface, and its second side S6 is a convex surface. The fourth lens L4 is a convex-convex lens with a positive optical power, its first side S8 is a convex surface, and its second side S9 is a convex surface. The fifth lens L5 is a convex-convex lens with a positive optical power, its first side S10 is a convex surface, and its second side S11 is a convex surface. The sixth lens L6 is a convex-convex lens with a positive optical power, its first side S12 is a convex surface, and its second side S13 is a convex surface. The seventh lens L7 is a concave-convex lens with a negative optical power, its first side S13 is a concave surface, and its second side S14 is a convex surface. The eighth lens L8 is a convex-concave lens with a positive optical power, its first side S15 is a convex surface, and its second side S16 is a concave surface. Among them, the sixth lens L6 and the seventh lens L7 are cemented to form a doublet lens; the first side S1 of the first lens L1, the first side S3 of the second lens L2, and the second side S16 of the eighth lens L8 have an inflection point.

[0451] The optical lens further includes a diaphragm STO disposed between the third lens L3 and the fourth lens L4, which is conducive to reasonably distributing the heights of the front and rear group of light rays, shortening the total length of the optical system, and reducing the apertures of the front and rear lens groups.

[0452] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the eighth lens L8 and the imaging surface (IMA). The filter, for example, has a first side S17 and a second side S18, and the protective glass, for example, has a first side S19 and a second side S20.

[0453] When the optical lens is used for imaging, the light from the object sequentially passes through the surfaces S1 to S20 and finally forms an image on the imaging surface; when the optical lens is used for projection, the light from the image source surface sequentially passes through the surfaces S20 to S1 and finally projects onto the target object (not shown).

[0454] Table 49 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens of the optical lens of Embodiment 25. In this embodiment, the first sides and second sides S1 - S6, S15 - S16 of the first lens L1, the second lens L2, the third lens L3, and the eighth lens L8 are all aspherical surfaces. Table 50 shows the conic coefficients and higher-order term coefficients that can be used for each aspherical mirror surface in this embodiment. Among them, each aspherical surface profile can be defined by the formula (1) given in Embodiment 1 above.

[0455]

[0456]

[0457] Table 49

[0458] Surface number k A4 A6 A8 A10 A12 A14 A16 S1 7.2818 0.0021932 -0.00014291 -3.019E-06 4.1276E-07 -1.763E-08 4.1901E-10 -4.008E-12 S2 -54.178 0.012469 -0.0017013 0.00010696 -3.786E-06 6.9785E-08 -3.472E-10 -3.289E-12 S3 -12.158 0.0086257 -0.0021948 0.00017507 -2.741E-06 -4.994E-07 3.394E-08 -6.78E-10 S4 -3.6239 0.014169 -0.0044017 0.00081572 -9.416E-05 6.9208E-06 -2.97E-07 5.4629E-09 S5 -5.7846 -0.00042714 0.000058384 -6.131E-06 -4.045E-06 1.3126E-06 -1.478E-07 5.6327E-09 S6 1.5402 0.00015547 -0.000013407 4.4163E-06 -7.432E-07 6.9531E-08 -3.428E-09 6.8027E-11 S15 -3.3234 0.00040971 -0.000021593 2.3475E-06 -2.005E-07 8.66E-09 -1.951E-10 1.5239E-12 S16 -70.157 -0.00079524 -0.0002002 1.2862E-05 -3.132E-07 1.3997E-09 5.3998E-11 -5.853E-13

[0459] Table 50

[0460] Figure 58 shows the angular resolution curve of the optical lens according to Embodiment 25 of the present application. Among them, the abscissa represents the field angle of the optical lens increasing from 0° to the maximum half-field angle of 50°, and the ordinate represents the central resolution value of the angular resolution curve of the optical lens. From Figure 58 it can be seen that the central resolution value of the angular resolution curve of the optical lens gradually decreases as the field angle of the optical lens increases.

[0461] Example 26

[0462] The following refers to Figure 26 to describe the optical lens according to Embodiment 26 of the present application. Figure 26 shows a schematic structural diagram of the optical lens according to Embodiment 26 of the present application.

[0463] As shown Figure 26 in the figure, the optical lens sequentially includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, and an eighth lens L8 along the optical axis from the first side to the second side.

[0464] The first lens L1 is a convex-convex lens with a positive optical power, its first side S1 is a convex surface, and its second side S2 is a convex surface. The second lens L2 is a convex-concave lens with a negative optical power, its first side S3 is a convex surface, and its second side S4 is a concave surface. The third lens L3 is a concave-convex lens with a positive optical power, its first side S5 is a concave surface, and its second side S6 is a convex surface. The fourth lens L4 is a convex-convex lens with a positive optical power, its first side S8 is a convex surface, and its second side S9 is a convex surface. The fifth lens L5 is a convex-convex lens with a positive optical power, its first side S10 is a convex surface, and its second side S11 is a convex surface. The sixth lens L6 is a convex-convex lens with a positive optical power, its first side S12 is a convex surface, and its second side S13 is a convex surface. The seventh lens L7 is a concave-convex lens with a negative optical power, its first side S13 is a concave surface, and its second side S14 is a convex surface. The eighth lens L8 is a convex-concave lens with a positive optical power, its first side S15 is a convex surface, and its second side S16 is a concave surface. Among them, the sixth lens L6 and the seventh lens L7 are cemented to form a doublet lens; the first side S1 of the first lens L1, the first side S3 of the second lens L2, and the second side S16 of the eighth lens L8 have an inflection point.

[0465] The optical lens further includes a stop STO disposed between the third lens L3 and the fourth lens L4, which is beneficial to reasonably distribute the height of the front and rear group of light rays, shorten the total length of the optical system, and reduce the aperture of the front and rear lens groups.

[0466] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the eighth lens L8 and the imaging surface (IMA). The filter has, for example, a first side S17 and a second side S18, and the protective glass has, for example, a first side S19 and a second side S20.

[0467] When the optical lens is used for imaging, the light from the object sequentially passes through the surfaces S1 to S20 and finally forms an image on the imaging surface; when the optical lens is used for projection, the light from the image source surface sequentially passes through the surfaces S20 to S1 and finally projects onto the target object (not shown).

[0468] Table 51 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens of the optical lens of Example 26. In this embodiment, the first side and the second sides S1-S6, S15-S16 of the first lens L1, the second lens L2, the third lens L3, and the eighth lens L8 are all aspherical surfaces. Table 52 shows the conic coefficient and the high-order term coefficient that can be used for each aspherical mirror surface in this embodiment. Among them, each aspherical surface type can be defined by formula (1) given in the above Example 1.

[0469]

[0470] Table 51

[0471]

[0472]

[0473] Table 52

[0474] Figure 59 shows the angular resolution curve of the optical lens according to Embodiment 26 of the present application. Among them, the abscissa represents the field angle of the optical lens increasing from 0° to the maximum half-field angle of 50°, and the ordinate represents the central resolution value of the angular resolution curve of the optical lens. From Figure 59 it can be seen that the central resolution value of the angular resolution curve of the optical lens gradually decreases as the field angle of the optical lens increases.

[0475] Example 27

[0476] The following refers to Figure 27 to describe the optical lens according to Embodiment 27 of the present application. Figure 27 shows a schematic structural diagram of the optical lens according to Embodiment 27 of the present application.

[0477] As Figure 27 shown, the optical lens sequentially includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, and an eighth lens L8 along the optical axis from the first side to the second side.

[0478] The first lens L1 is a convex-convex lens with a positive focal power. Its first side S1 is a convex surface, and its second side S2 is a convex surface. The second lens L2 is a convex-concave lens with a negative focal power. Its first side S3 is a convex surface, and its second side S4 is a concave surface. The third lens L3 is a concave-convex lens with a positive focal power. Its first side S5 is a concave surface, and its second side S6 is a convex surface. The fourth lens L4 is a convex-convex lens with a positive focal power. Its first side S8 is a convex surface, and its second side S9 is a convex surface. The fifth lens L5 is a convex-concave lens with a negative focal power. Its first side S10 is a convex surface, and its second side S11 is a concave surface. The sixth lens L6 is a convex-convex lens with a positive focal power. Its first side S11 is a convex surface, and its second side S12 is a convex surface. The seventh lens L7 is a convex-convex lens with a positive focal power. Its first side S13 is a convex surface, and its second side S14 is a convex surface. The eighth lens L8 is a convex-concave lens with a negative focal power. Its first side S15 is a convex surface, and its second side S16 is a concave surface. Among them, the fifth lens L5 and the sixth lens L6 are cemented to form a doublet lens; the first side S1 of the first lens L1, the first side S3 of the second lens L2, and the first side S15 and the second side S16 of the eighth lens L8 have inflection points.

[0479] The optical lens further includes a diaphragm STO disposed between the third lens L3 and the fourth lens L4, which is conducive to reasonably distributing the light heights of the front and rear groups, shortening the total length of the optical system, and reducing the apertures of the front and rear lens groups.

[0480] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the eighth lens L8 and the imaging surface (IMA). The filter has, for example, a first side S17 and a second side S18, and the protective glass has, for example, a first side S19 and a second side S20.

[0481] When the optical lens is used for imaging, the light from the object sequentially passes through the surfaces S1 to S20 and finally forms an image on the imaging surface; when the optical lens is used for projection, the light from the image source surface sequentially passes through the surfaces S20 to S1 and finally projects onto the target object (not shown).

[0482] Table 53 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens of the optical lens of Embodiment 27. In this embodiment, the first side and the second sides S1 - S6, S15 - S16 of the first lens L1, the second lens L2, the third lens L3, and the eighth lens L8 are all aspherical surfaces. Table 54 shows the conic coefficient and the high-order term coefficient that can be used for each aspherical mirror surface in this embodiment. Among them, each aspherical surface type can be defined by the formula (1) given in Embodiment 1 above.

[0483]

[0484] Table 53

[0485]

[0486]

[0487] Table 54

[0488] Figure 60 shows the angular resolution curve of the optical lens according to Embodiment 27 of the present application. Among them, the abscissa represents the field of view angle of the optical lens increasing from 0° to the maximum semi-field angle of 50°, and the ordinate represents the central resolution value of the angular resolution curve of the optical lens. From Figure 60 it can be seen that the central resolution value of the angular resolution curve of the optical lens gradually decreases as the field of view angle of the optical lens increases.

[0489] Example 28

[0490] The following will refer to Figure 28 to describe the optical lens according to Embodiment 28 of the present application. Figure 28 shows a schematic structural diagram of the optical lens according to Embodiment 28 of the present application.

[0491] As Figure 28 shown, the optical lens sequentially includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, and an eighth lens L8 from the first side to the second side along the optical axis.

[0492] The first lens L1 is a convex-convex lens with a positive optical power, its first side S1 is a convex surface, and its second side S2 is a convex surface. The second lens L2 is a convex-concave lens with a negative optical power, its first side S3 is a convex surface, and its second side S4 is a concave surface. The third lens L3 is a concave-convex lens with a positive optical power, its first side S5 is a concave surface, and its second side S6 is a convex surface. The fourth lens L4 is a convex-convex lens with a positive optical power, its first side S8 is a convex surface, and its second side S9 is a convex surface. The fifth lens L5 is a convex-concave lens with a negative optical power, its first side S10 is a convex surface, and its second side S11 is a concave surface. The sixth lens L6 is a convex-convex lens with a positive optical power, its first side S11 is a convex surface, and its second side S12 is a convex surface. The seventh lens L7 is a convex-convex lens with a positive optical power, its first side S13 is a convex surface, and its second side S14 is a convex surface. The eighth lens L8 is a convex-concave lens with a negative optical power, its first side S15 is a convex surface, and its second side S16 is a concave surface. Among them, the fifth lens L5 and the sixth lens L6 are cemented to form a doublet lens; the first side S1 of the first lens L1, the first side S3 of the second lens L2, and the first side S15 and the second side S16 of the eighth lens L8 have an inflection point.

[0493] The optical lens further includes a stop STO disposed between the third lens L3 and the fourth lens L4, which is beneficial to reasonably distribute the ray heights of the front and rear groups, shorten the total length of the optical system, and reduce the apertures of the front and rear lens groups.

[0494] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the eighth lens L8 and the imaging surface (IMA). The filter has, for example, a first side S17 and a second side S18, and the protective glass has, for example, a first side S19 and a second side S20.

[0495] When the optical lens is used for imaging, light from an object sequentially passes through the surfaces S1 to S20 and finally forms an image on the imaging surface; when the optical lens is used for projection, light from an image source surface sequentially passes through the surfaces S20 to S1 and finally projects onto a target object (not shown).

[0496] Table 55 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens of the optical lens of Embodiment 28. In this embodiment, the first sides and second sides S1-S6, S15-S16 of the first lens L1, the second lens L2, the third lens L3, and the eighth lens L8 are all aspherical surfaces. Table 56 shows the conic coefficients and higher-order term coefficients of the aspherical mirror surfaces that can be used in this embodiment. Among them, each aspherical surface profile can be defined by the formula (1) given in Embodiment 1 above.

[0497]

[0498] Table 55

[0499] Surface number k A4 A6 A8 A10 A12 A14 A16 S1 4.873 0.0021862 -0.00013314 -3.235E-06 3.4895E-07 -1.245E-08 2.6554E-10 -2.426E-12 S2 -99 0.011968 -0.0014348 7.2855E-05 -1.774E-06 8.6179E-09 5.4471E-10 -7.94E-12 S3 -10.541 0.0076202 -0.0017262 0.00011146 1.0778E-06 -5.754E-07 3.1605E-08 -5.75E-10 S4 -3.4278 0.010953 -0.0032675 0.00054526 -5.448E-05 3.3577E-06 -1.205E-07 1.8778E-09 S5 -2.8134 -0.00060637 0.000067658 -1.402E-05 -9.963E-07 7.5674E-07 -9.877E-08 3.9939E-09 S6 1.5208 0.00011704 -9.8237E-06 3.7194E-06 -6.131E-07 5.8031E-08 -2.931E-09 6.07E-11 S15 -24.382 0.00029046 -0.000023187 2.0966E-06 -1.715E-07 6.9708E-09 -1.456E-10 1.0577E-12 S16 -98.604 -0.00086767 -0.00022083 1.6523E-05 -5.685E-07 1.0423E-08 -9.963E-11 3.9698E-13

[0500] Table 56

[0501] Figure 61 shows the angular resolution curve of the optical lens according to Embodiment 28 of the present application. Among them, the abscissa represents the field angle of the optical lens increasing from 0° to the maximum half-field angle of 50°, and the ordinate represents the central resolution value of the angular resolution curve of the optical lens. As Figure 61 can be seen, the central resolution value of the angular resolution curve of the optical lens gradually decreases as the field angle of the optical lens increases.

[0502] Example 29

[0503] The following refers to Figure 29 to describe the optical lens according to Embodiment 29 of the present application. Figure 29 shows a schematic structural diagram of the optical lens according to Embodiment 29 of the present application.

[0504] As Figure 29As shown, the optical lens sequentially includes 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 along the optical axis from the first side to the second side.

[0505] The first lens L1 is a convex-convex lens with positive optical power, its first side S1 is a convex surface, and its second side S2 is a convex surface. The second lens L2 is a convex-concave lens with negative optical power, its first side S3 is a convex surface, and its second side S4 is a concave surface. The third lens L3 is a concave-convex lens with positive optical power, its first side S5 is a concave surface, and its second side S6 is a convex surface. The fourth lens L4 is a convex-concave lens with negative optical power, its first side S8 is a convex surface, and its second side S9 is a concave surface. The fifth lens L5 is a convex-convex lens with positive optical power, its first side S9 is a convex surface, and its second side S10 is a convex surface. The sixth lens L6 is a convex-concave lens with positive optical power, its first side S11 is a convex surface, and its second side S12 is a concave surface. Among them, the fourth lens L4 and the fifth lens L5 are cemented to form a doublet lens; the first side S1 of the first lens L1 and the second side S12 of the sixth lens L6 have an inflection point.

[0506] The optical lens further includes a stop STO disposed between the third lens L3 and the fourth lens L4, which is beneficial to reasonably distribute the ray heights of the front and rear groups, shorten the total length of the optical system, and reduce the apertures of the front and rear lens groups.

[0507] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the sixth lens L6 and the imaging surface (IMA). The filter, for example, has a first side S13 and a second side S14, and the protective glass, for example, has a first side S15 and a second side S16.

[0508] When the optical lens is used for imaging, light from an object sequentially passes through the surfaces S1 to S16 and finally forms an image on the imaging surface; when the optical lens is used for projection, light from the image source surface sequentially passes through the surfaces S16 to S1 and finally projects onto a target object (not shown).

[0509] Table 57 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens of the optical lens of Embodiment 29. In this embodiment, the first sides and second sides S1-S6, S11-S12 of the first lens L1, the second lens L2, the third lens L3, and the sixth lens L6 are all aspherical surfaces. Table 58 shows the conic coefficient and higher-order term coefficients that can be used for each aspherical mirror surface in this embodiment. Among them, each aspherical surface type can be defined by the formula (1) given in Embodiment 1 above.

[0510]

[0511]

[0512] Table 57

[0513] Surface number k A4 A6 A8 A10 A12 A14 A16 S1 17.885 0.0018828 -0.00013517 3.1051E-07 1.0709E-07 -4.406E-09 1.2582E-10 -1.447E-12 S2 -98.802 0.0078633 -0.00092812 4.2647E-05 -5.541E-07 -2.83E-08 1.2374E-09 -1.366E-11 S3 -13.182 0.0044524 -0.0011179 7.5024E-05 -9.715E-09 -2.786E-07 1.5044E-08 -2.602E-10 S4 -3.7873 0.012243 -0.0036368 0.00079411 -0.0001207 1.2417E-05 -7.388E-07 1.8076E-08 S5 -6.8608 -0.00079934 0.000048726 1.1749E-05 -1.354E-05 3.5629E-06 -4.037E-07 1.672E-08 S6 1.1434 0.00038336 0.000010813 1.0557E-06 -1.31E-07 2.0389E-08 -1.29E-09 4.0596E-11 S11 2.4268 0.00011577 -0.000029313 3.2924E-06 -3.017E-07 1.364E-08 -3.165E-10 2.6438E-12 S12 -99 -0.000474 -0.0003447 2.3838E-05 -7.01E-07 8.9716E-09 -2.891E-11 -1.754E-13

[0514] Table 58

[0515] Figure 62 shows the angular resolution curve of the optical lens according to Embodiment 29 of the present application. Among them, the abscissa represents that the field angle of the optical lens increases from 0° to the maximum semi-field angle of 50°, and the ordinate represents the central resolution value of the angular resolution curve of the optical lens. From Figure 62 it can be seen that the central resolution value of the angular resolution curve of the optical lens gradually decreases as the field angle of the optical lens increases.

[0516] Example 30

[0517] The following is a reference to Figure 30 describe the optical lens according to Embodiment 30 of the present application. Figure 30 shows a schematic structural diagram of the optical lens according to Embodiment 30 of the present application.

[0518] As Figure 30 shown, the optical lens sequentially includes 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 along the optical axis from the first side to the second side.

[0519] The first lens L1 is a convex-convex lens with a positive optical power, its first side S1 is a convex surface, and its second side S2 is a convex surface. The second lens L2 is a convex-concave lens with a negative optical power, its first side S3 is a convex surface, and its second side S4 is a concave surface. The third lens L3 is a concave-convex lens with a positive optical power, its first side S5 is a concave surface, and its second side S6 is a convex surface. The fourth lens L4 is a convex-concave lens with a negative optical power, its first side S8 is a convex surface, and its second side S9 is a concave surface. The fifth lens L5 is a convex-convex lens with a positive optical power, its first side S9 is a convex surface, and its second side S10 is a convex surface. The sixth lens L6 is a convex-concave lens with a positive optical power, its first side S11 is a convex surface, and its second side S12 is a concave surface. Among them, the fourth lens L4 and the fifth lens L5 are cemented to form a doublet lens; the first side S1 of the first lens L1 and the second side S12 of the sixth lens L6 have an inflection point.

[0520] The optical lens further includes a diaphragm STO disposed between the third lens L3 and the fourth lens L4, which is beneficial to reasonably distribute the light height of the front and rear groups, shorten the total length of the optical system, and reduce the apertures of the front and rear lens groups.

[0521] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the sixth lens L6 and the imaging surface (IMA). The filter has, for example, a first side S13 and a second side S14, and the protective glass has, for example, a first side S15 and a second side S16.

[0522] When the optical lens is used for imaging, light from an object sequentially passes through the surfaces S1 to S16 and finally forms an image on the imaging surface; when the optical lens is used for projection, light from the image source surface sequentially passes through the surfaces S16 to S1 and finally projects onto a target object (not shown).

[0523] Table 59 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens of the optical lens of Embodiment 30. In this embodiment, the first sides and second sides S1 - S6, S11 - S12 of the first lens L1, the second lens L2, the third lens L3, and the sixth lens L6 are all aspherical surfaces. Table 60 shows the conic coefficients and high-order term coefficients that can be used for each aspherical mirror surface in this embodiment. Among them, each aspherical surface profile can be defined by the formula (1) given in Embodiment 1 above.

[0524]

[0525] Table 59

[0526]

[0527]

[0528] Table 60

[0529] Figure 63 shows the angular resolution curve of the optical lens according to Embodiment 30 of the present application. Among them, the abscissa represents the field of view angle of the optical lens increasing from 0° to the maximum half field of view angle of 50°, and the ordinate represents the central resolution value of the angular resolution curve of the optical lens. From Figure 63 it can be seen that the central resolution value of the angular resolution curve of the optical lens gradually decreases as the field of view angle of the optical lens increases.

[0530] Example 31

[0531] The following refers to Figure 31 to describe the optical lens according to Embodiment 31 of the present application. Figure 31 shows a schematic structural diagram of the optical lens according to Embodiment 31 of the present application.

[0532] As Figure 31As shown, the optical lens sequentially includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, and a ninth lens L9 along the optical axis from the first side to the second side.

[0533] The first lens L1 is a convex-convex lens with a positive focal power, its first side S1 is a convex surface, and its second side S2 is a convex surface. The second lens L2 is a convex-concave lens with a negative focal power, its first side S3 is a convex surface, and its second side S4 is a concave surface. The third lens L3 is a concave-convex lens with a positive focal power, its first side S5 is a concave surface, and its second side S6 is a convex surface. The fourth lens L4 is a convex-concave lens with a positive focal power, its first side S8 is a convex surface, and its second side S9 is a concave surface. The fifth lens L5 is a concave-convex lens with a positive focal power, its first side S10 is a concave surface, and its second side S11 is a convex surface. The sixth lens L6 is a convex-convex lens with a positive focal power, its first side S12 is a convex surface, and its second side S13 is a convex surface. The seventh lens L7 is a concave-convex lens with a negative focal power, its first side S13 is a concave surface, and its second side S14 is a convex surface. The eighth lens L8 is a convex-concave lens with a positive focal power, its first side S15 is a convex surface, and its second side S16 is a concave surface. The ninth lens L9 is a convex-concave lens with a positive focal power, its first side S17 is a convex surface, and its second side S18 is a concave surface. Among them, the sixth lens L6 and the seventh lens L7 are cemented to form a doublet lens; the first side S1 of the first lens L1, the first side S3 of the second lens L2, and the second side S18 of the ninth lens L9 have an inflection point.

[0534] The optical lens further includes a stop STO disposed between the third lens L3 and the fourth lens L4, which is beneficial to reasonably distribute the ray heights of the front and rear groups, shorten the total length of the optical system, and reduce the apertures of the front and rear lens groups.

[0535] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the ninth lens L9 and the imaging surface (IMA). The filter has, for example, a first side S19 and a second side S20, and the protective glass has, for example, a first side S21 and a second side S22.

[0536] When the optical lens is used for imaging, the light from the object sequentially passes through the surfaces S1 to S22 and finally forms an image on the imaging surface; when the optical lens is used for projection, the light from the image source surface sequentially passes through the surfaces S22 to S1 and finally projects onto the target object (not shown).

[0537] Table 61 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens of the optical lens of Embodiment 31. In this embodiment, the first side and the second sides S1-S6, S17-S18 of the first lens L1, the second lens L2, the third lens L3, and the ninth lens L9 are all aspherical surfaces. Table 62 shows the conic coefficient and the high-order term coefficient that can be used for each aspherical mirror surface in this embodiment. Among them, each aspherical surface profile can be defined by the formula (1) given in Embodiment 1 above.

[0538]

[0539] Table 61

[0540] Surface number k A4 A6 A8 A10 A12 A14 A16 S1 27.647 0.0022578 -0.00012462 -3.365E-06 4.6105E-07 -2.03E-08 4.5033E-10 -3.885E-12 S2 -95.397 0.011404 -0.0013566 6.0412E-05 -3.257E-07 -7.45E-08 2.7666E-09 -3.032E-11 S3 -15.621 0.0059844 -0.0013008 4.2495E-05 7.5273E-06 -9.021E-07 4.0233E-08 -6.732E-10 S4 -4.0266 0.01061 -0.0028707 0.0004944 -5.813E-05 4.9788E-06 -2.72E-07 6.3702E-09 S5 -3.0876 -0.00018728 0.000031263 2.4002E-05 -1.456E-05 3.1221E-06 -3.052E-07 1.1019E-08 S6 1.8935 0.000095419 -0.00001457 4.0816E-06 -6.908E-07 6.2442E-08 -2.948E-09 5.577E-11 S17 -0.0026652 -0.000037462 -0.000006636 5.5301E-07 -2.88E-08 7.6774E-10 -1.072E-11 5.2141E-14 S18 1.9125 -0.0012649 -0.00010767 3.3888E-06 1.8244E-07 -1.225E-08 2.5122E-10 -1.767E-12

[0541] Table 62

[0542] Figure 64 shows the angular resolution curve of the optical lens according to Embodiment 31 of the present application. Among them, the abscissa represents the field angle of the optical lens increasing from 0° to the maximum half-field angle of 50°, and the ordinate represents the central resolution value of the angular resolution curve of the optical lens. From Figure 64 it can be seen that the central resolution value of the angular resolution curve of the optical lens gradually decreases as the field angle of the optical lens increases.

[0543] Example 32

[0544] The following refers to Figure 32 to describe the optical lens according to Embodiment 32 of the present application. Figure 32 shows a schematic structural diagram of the optical lens according to Embodiment 32 of the present application.

[0545] As Figure 32 shown, the optical lens sequentially includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, and a ninth lens L9 along the optical axis from the first side to the second side.

[0546] The first lens L1 is a convex-convex lens with a positive focal power. Its first surface S1 is a convex surface, and its second surface S2 is a convex surface. The second lens L2 is a convex-concave lens with a negative focal power. Its first surface S3 is a convex surface, and its second surface S4 is a concave surface. The third lens L3 is a concave-convex lens with a positive focal power. Its first surface S5 is a concave surface, and its second surface S6 is a convex surface. The fourth lens L4 is a convex-concave lens with a positive focal power. Its first surface S8 is a convex surface, and its second surface S9 is a concave surface. The fifth lens L5 is a concave-convex lens with a positive focal power. Its first surface S10 is a concave surface, and its second surface S11 is a convex surface. The sixth lens L6 is a convex-convex lens with a positive focal power. Its first surface S12 is a convex surface, and its second surface S13 is a convex surface. The seventh lens L7 is a concave-convex lens with a negative focal power. Its first surface S13 is a concave surface, and its second surface S14 is a convex surface. The eighth lens L8 is a convex-concave lens with a positive focal power. Its first surface S15 is a convex surface, and its second surface S16 is a concave surface. The ninth lens L9 is a convex-concave lens with a positive focal power. Its first surface S17 is a convex surface, and its second surface S18 is a concave surface. Among them, the sixth lens L6 and the seventh lens L7 are cemented to form a doublet lens; the first surface S1 of the first lens L1, the first surface S3 of the second lens L2, and the second surface S18 of the ninth lens L9 have an inflection point.

[0547] The optical lens further includes a stop STO disposed between the third lens L3 and the fourth lens L4, which is beneficial to reasonably distribute the light heights of the front and rear groups, shorten the total length of the optical system, and reduce the apertures of the front and rear lens groups.

[0548] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the ninth lens L9 and the imaging surface (IMA). The filter has, for example, a first surface S19 and a second surface S20, and the protective glass has, for example, a first surface S21 and a second surface S22.

[0549] When the optical lens is used for imaging, the light from the object sequentially passes through the surfaces S1 to S22 and finally forms an image on the imaging surface; when the optical lens is used for projection, the light from the image source surface sequentially passes through the surfaces S22 to S1 and finally projects onto the target object (not shown).

[0550] Table 63 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens of the optical lens of Embodiment 32. In this embodiment, the first surfaces and the second surfaces S1-S6, S17-S18 of the first lens L1, the second lens L2, the third lens L3, and the ninth lens L9 are all aspherical surfaces. Table 64 shows the conic coefficient and the high-order term coefficient that can be used for each aspherical mirror surface in this embodiment. Among them, each aspherical surface type can be defined by the formula (1) given in Embodiment 1 above.

[0551]

[0552]

[0553] Table 63

[0554] Surface number k A4 A6 A8 A10 A12 A14 A16 S1 27.675 0.0022601 -0.00012474 -3.369E-06 4.6151E-07 -2.032E-08 4.5078E-10 -3.889E-12 S2 -95.492 0.011416 -0.0013579 6.0473E-05 -3.26E-07 -7.457E-08 2.7694E-09 -3.035E-11 S3 -15.637 0.0059904 -0.0013021 4.2537E-05 7.5349E-06 -9.03E-07 4.0273E-08 -6.739E-10 S4 -4.0306 0.010621 -0.0028736 0.0004949 -5.819E-05 4.9838E-06 -2.723E-07 6.3766E-09 S5 -3.0783 -0.00018654 0.000031138 2.3906E-05 -1.45E-05 3.1096E-06 -3.04E-07 1.0975E-08 S6 1.886 0.000095037 -0.000014512 4.0652E-06 -6.88E-07 6.2193E-08 -2.936E-09 5.5547E-11 S17 -0.0026546 -0.000037312 -6.6095E-06 5.5079E-07 -2.869E-08 7.6467E-10 -1.068E-11 5.1932E-14 S18 1.9049 -0.0012598 -0.00010724 3.3753E-06 1.8171E-07 -1.22E-08 2.5021E-10 -1.76E-12

[0555] Table 64

[0556] Figure 65 shows the angular resolution curve of the optical lens according to Embodiment 32 of the present application. Among them, the abscissa represents the field of view angle of the optical lens increasing from 0° to the maximum half field of view angle of 50°, and the ordinate represents the central resolution value of the angular resolution curve of the optical lens. From Figure 65 it can be seen that the central resolution value of the angular resolution curve of the optical lens gradually decreases as the field of view angle of the optical lens increases.

[0557] In summary, the parameter values in Embodiments 1 to 32 are shown in Tables 29-1, 29-2, 29-3, and 29-4 below, where the units of F, ENPD, TTL, H, D, F1, F2, F3, D2, D4, D11, H (θ / 10) , SAG1, SAG2, SAG4, SAG11, SAG13, SAG14, d1e, dL, and FL are all millimeters (mm), and the units of FOV, arctan(1 / K(S1)), arctan(1 / K(S3)), arctan(1 / K(S13)), arctan(1 / K(S14)), G 1-θ2 , G 2-θ2 are degrees (°).

[0558] Parameter / Example Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 F 7.9153 8.0310 7.8279 7.8279 7.8868 7.8475 7.9253 ENPD 4.9471 5.0194 4.8924 4.8924 4.9292 4.9047 4.9533 TTL 31.6392 31.6392 30.5146 30.5146 33.2165 33.0597 30.4590 FOV 100.0000 100.0000 120.0000 120.0000 100.0000 100.0000 100.0000 H 8.0727 8.0840 8.4684 8.4786 8.0816 8.0631 8.0844 D 9.0900 9.1913 9.3964 9.4540 9.2185 9.1199 9.2125 F1 -40.0446 -40.4034 55.8106 55.8106 40.3619 40.1601 36.6218 F2 -15.0616 -15.0736 -9.6033 -9.6033 -7.0742 -7.0388 -7.1590 F3 15.5431 15.7411 -161.6513 -161.6513 16.8961 16.8116 13.7930 D2 7.5658 7.7090 7.8907 7.9475 7.7342 7.6191 7.8164 D4 4.7289 4.7493 4.6648 4.6656 4.7598 4.7241 4.7667 D11 7.9684 8.0033 8.7816 8.7823 8.1995 8.1923 8.0943 <![CDATA[H (θ / 10) > 1.3400 1.3300 1.575 1.588 1.3340 1.3530 1.3400 arctan(1 / K(S1)) 0.1255 -1.2993 -3.6322 -3.9097 -0.9653 -0.2588 -0.6735 arctan(1 / K(S3)) 0.1255 -1.2993 -3.6322 -3.9097 -0.9653 -0.2588 -0.6735 arctan(1 / K(S13)) 21.6723 21.2918 18.1154 18.0829 26.2261 26.4801 17.9621 arctan(1 / K(S14)) -32.5697 -32.7581 -37.6056 -37.6298 -29.3588 -29.2267 -35.4465 SAG1 0.5917 0.5819 0.7279 0.7261 0.5519 0.5557 0.6508 SAG2 0.5483 0.5502 0.5686 0.5702 0.4234 0.4253 0.4565 SAG4 0.8763 0.8794 1.0536 1.0539 0.8667 0.8590 0.9426 SAG11 1.4097 1.4058 1.6635 1.6638 1.4595 1.4660 1.4438 SAG13 1.1546 1.1424 1.3146 1.3150 1.3825 1.3886 1.0305 SAG14 -0.7152 -0.7254 -0.8950 -0.8962 -0.6461 -0.6389 -0.9215 d1e 1.4938 1.5056 1.4048 1.3961 1.4948 1.4849 1.3957 <![CDATA[G 1-θ2 > 10.6317 10.7287 13.2 13.35 10.0064 10.0063 11.5686 dL 4.8000 4.8000 4.3646 4.3646 4.8000 4.7760 4.8000 FL 136.8004 139.0102 153.3022 155.9122 85.8322 85.4031 175.1382 <![CDATA[G 2-θ2 > 15.9528 16.1132 25.2446 25.3573 13.6394 13.5901 15.6194 PPDmax 98.6 99.1 97.5 98.1 98.3 97.9 97.9 PPDmin 19.0 18.5 11.2 11.5 19.2 19.2 19.2

[0559] Table 29-1

[0560] Parameter / Example Example 8 Example 9 Example 10 Example 11 Example 12 Example 13 Example 14 F 7.8910 7.8611 7.8116 8.0336 7.9934 7.9496 7.9098 ENPD 4.9319 4.9132 4.8823 5.0210 4.9959 4.9685 4.9437 TTL 30.3356 32.7943 32.6118 30.4750 30.3324 34.1485 33.9528 FOV 100.0000 100.0000 100.0000 100.0000 100.0000 100 100 H 8.0794 8.0831 8.0302 8.0814 8.0904 8.0851 8.079 D 9.1905 9.2287 9.1662 9.0000 9.0000 9.2136 9.2025 F1 36.4387 30.9243 31.1484 -722.3165 -718.7050 32.3315 32.1699 F2 -7.1232 -6.6877 -6.6543 -10.0070 -9.9570 -6.7613 -6.7275 F3 13.7240 16.7791 16.6952 16.6316 16.5485 14.3872 14.3153 D2 7.7968 7.8576 7.7965 7.6061 7.6134 7.6989 7.6965 D4 4.7593 4.7517 4.7419 4.7957 4.7881 5.3402 5.3323 D11 8.0870 8.9767 8.9571 7.4331 7.4247 7.4958 7.4536 <![CDATA[H (θ / 10) > 1.3300 1.3370 1.3410 1.3340 1.3530 1.339 1.332 arctan(1 / K(S1)) -0.4994 -1.4835 -1.6195 0.8542 0.7988 -2.7428 -2.7592 arctan(1 / K(S3)) -0.4994 -1.4835 -1.6195 0.8542 0.7988 -2.7428 -2.7592 arctan(1 / K(S13)) 18.1138 11.9347 13.4162 22.1783 22.3831 28.4635 28.9491 arctan(1 / K(S14)) -35.2853 -33.3366 -32.6587 -30.2340 -29.7335 -30.4723 -30.1026 SAG1 0.6553 0.5978 0.5887 0.5426 0.5455 0.6604 0.6639 SAG2 0.4604 0.3392 0.3419 0.5541 0.5584 0.5771 0.5805 SAG4 0.9432 0.9525 0.9529 0.8004 0.8015 1.0722 1.0731 SAG11 1.4501 -1.5442 -1.5464 1.2874 1.2924 1.2611 1.2529 SAG13 1.0287 0.9605 0.9731 1.1046 1.1054 1.5642 1.5632 SAG14 -0.9126 -0.7776 -0.7449 -0.5649 -0.5437 -1.0681 -1.0508 d1e 1.3872 1.3994 1.4028 1.3719 1.3665 1.598 1.5895 <![CDATA[G 1-θ2 > 11.6157 11.0084 10.8750 9.4838 9.5462 13.1111 13.1801 dL 4.7760 4.7244 4.7008 3.8124 3.7934 4.8 4.776 FL 178.9507 152.0370 151.2768 -238.2224 -237.0313 21.8228 21.7137 <![CDATA[G 2-θ2 > 15.6620 14.9851 15.0108 13.7418 13.8010 17.3692 17.4336 PPDmax 97.9 97.9 97.2 100.1 99.7 99.1 98.5 PPDmin 19.2 19.2 18.3 19.2 19.6 19.5 19.6

[0561] Table 29-2

[0562] Parameter / Example Example 15 Example 16 Example 17 Example 18 Example 19 Example 20 Example 21 Example 22 Example 23 F 7.8875 7.9058 7.9162 7.9453 7.8127 7.8506 7.9313 7.9653 7.9006 ENPD 4.9297 4.9411 4.9476 4.9658 4.8829 4.9066 4.9570 4.9783 4.9379 TTL 31.8984 31.9090 31.7622 31.7909 35.0061 35.0085 30.7500 30.7477 31.3944 FOV 100.0000 100.0000 100.0000 100.0000 100.0000 100.0000 100.0000 100.0000 100.0000 H 8.0855 8.0644 8.0842 8.0813 8.0896 8.0531 8.0833 8.0690 8.0873 D 9.2873 9.2435 9.2341 9.2212 9.2968 9.2762 9.0133 8.9954 9.2912 F1 36.9010 36.9389 32.8639 32.9300 24.2961 24.3432 30.4196 30.4803 26.1682 F2 -7.1041 -7.1042 -7.0408 -7.0454 -5.9760 -5.9799 -6.8878 -6.8876 -6.3610 F3 17.0962 17.1292 15.4349 15.4841 24.0858 24.1886 15.1076 15.1644 15.7168 D2 7.8523 7.8112 7.8116 7.8004 7.8883 7.8707 7.6184 7.6052 7.9731 D4 4.9142 4.9030 4.8951 4.8975 5.0888 5.0890 5.0929 5.0939 5.0692 D13 11.2000 11.2000 11.2000 11.2000 10.7875 10.8102 10.5662 10.5973 10.4815 D14 11.1658 11.1974 11.2326 11.2866 10.1424 10.1762 10.7823 10.8318 10.8209 <![CDATA[H (θ / 10) > 1.3352 1.3396 1.3381 1.3445 1.3272 1.3346 1.3395 1.3470 1.3358 arctan(1 / K(S1)) -2.3571 -2.4356 -2.7525 -2.7667 -3.0399 -3.0049 -3.4006 -3.4151 -2.8956 arctan(1 / K(S3)) 5.9082 5.9792 5.4120 5.3908 -2.9311 -2.9503 3.5006 3.4953 2.2403 arctan(1 / K(S13)) 23.2507 23.2017 20.7372 20.5987 21.4856 21.4284 18.5840 18.2298 5.5832 arctan(1 / K(S14)) -33.0803 -33.1525 -34.4307 -34.5387 -20.2184 -20.2695 -35.3661 -35.6092 -37.5033 SAG1 0.5306 0.5281 0.5065 0.5051 0.3991 0.3985 0.4475 0.4463 0.5835 SAG2 0.3902 0.3912 0.3607 0.3615 0.1638 0.1656 0.3612 0.3620 0.3170 SAG4 0.9447 0.9419 0.9670 0.9668 1.0134 1.0123 1.0335 1.0326 1.0940 SAG13 1.3366 1.3341 1.2563 1.2506 1.2400 1.2421 1.2021 1.2039 0.7666 SAG14 -0.8460 -0.8509 -0.9289 -0.9356 -0.2431 -0.2474 -0.8337 -0.8459 -0.9499 d1e 1.4984 1.4987 1.5009 1.4998 1.4978 1.4933 1.4979 1.4935 1.3962 <![CDATA[G 1-θ2 > 10.1278 10.0761 9.8815 9.8587 8.0033 7.9792 9.5609 9.5341 11.4288 dL 4.8000 4.7904 4.8000 4.7904 4.7691 4.7500 4.8000 4.7808 4.4056 FL 96.6564 96.8712 122.5362 122.9978 51.9271 52.1362 61.3892 61.6226 225.0223 <![CDATA[G 2-θ2 > 14.7053 14.6823 15.5347 15.5186 12.7745 12.7606 15.9941 15.977 15.7898 PPDmax 98.2 98.5 98.6 99.1 97.3 97.9 98.8 99.3 98.3 PPDmin 19.4 19.0 19.3 19.2 19.3 18.8 19.8 19.4 19.8

[0563] Table 29-3

[0564]

[0565]

[0566] Table 29-4

[0567] In addition, Embodiments 1 to 32 respectively satisfy the relationships shown in Tables 30-1, 30-2, 30-3, and 30-4 below.

[0568]

[0569]

[0570] Table 30-1

[0571]

[0572]

[0573] Table 30-2

[0574]

[0575] Table 30-3

[0576]

[0577]

[0578] Table 30-4

[0579] The present application also provides an electronic device, which may include an optical lens according to the above embodiments of the present application and an imaging element for converting an optical image formed by the optical lens into an electrical signal. The electronic device may be an independent electronic device such as a ranging camera, or an imaging module integrated on a ranging device such as a ranging device. In addition, the electronic device may also be an independent imaging device such as a vehicle-mounted camera, or an imaging module integrated on an auxiliary driving system such as an auxiliary driving system.

[0580] The above description is only a preferred embodiment of the present application and an explanation of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the technical solutions formed by mutually replacing the above features with the technical features (but not limited to) having similar functions disclosed in the present application.

Claims

1. An optical lens, characterized in that, The optical lens sequentially includes a first lens group, a second lens group, and a third lens group along the optical axis from the first side to the second side, wherein, the first lens group includes at least a first lens closest to the first side and having a focal power; the second lens group includes at least three lenses having a focal power; the third lens group includes the last lens having a focal power; the paraxial region of the first side of the first lens is a convex surface; The marginal opening angle arctan(1 / K(S1)) of the first side of the first lens at the maximum field of view angle of the optical lens and the opening angle G at the half-aperture of the first side of the first lens 1-θ2 Satisfy: arctan(1 / K(S1)) / G 1-θ2 ≤ 0.4; and the angular resolution value of the optical lens gradually decreases as the field angle of the optical lens gradually increases from the center to the edge.

2. The optical lens according to claim 1, characterized in that, The angular resolution PPDmax corresponding to the central field of view of the optical lens and the angular resolution PPDmin corresponding to the peripheral field of view of the optical lens satisfy: PPDmax / PPDmin ≥ 3.

3. The optical lens according to claim 2, characterized in that, Satisfy: 3.5 ≤ PPDmax / PPDmin ≤ 12.

4. The optical lens according to claim 1, characterized in that, The first lens group further includes a second lens having a negative focal power, the first side of which is a convex surface and the second side of which is a concave surface.

5. The optical lens according to claim 1, characterized in that, The second lens group includes a cemented lens, and the first side of the cemented lens is a convex surface.

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

7. The optical lens according to claim 1, characterized in that, The semi-image height H corresponding to one-tenth of the maximum field of view angle of the optical lens (θ / 10) The image height H corresponding to the maximum field of view angle of the optical lens satisfies: H (θ / 10) / (H / 2) ≥ 0.

22.

8. The optical lens according to claim 7, characterized in that, Satisfy: H (θ / 10) / (H / 2) ≥ 0.

25.

9. The optical lens according to claim 4, characterized in that, The radius of curvature R3 of the first side of the second lens and the total effective focal length F of the optical lens satisfy: R3 / F ≥ 0.

2.

10. An electronic device, characterized in that, An optical lens according to any one of claims 1-9 and an imaging element for converting an optical image formed by the optical lens into an electrical signal are included.

Images