Optical lens

Abstract

The application provides an optical lens, which comprises eight lenses in sequence along an optical axis from an object side to an imaging surface, and the eight lenses comprise: a first lens with negative optical power, wherein an object side surface of the first lens is a convex surface, and an image side surface of the first lens is a concave surface; a second lens with negative optical power; a third lens with positive optical power; a fourth lens with positive optical power; a fifth lens with positive optical power, wherein an object side surface of the fifth lens is a convex surface, and an image side surface of the fifth lens is a concave surface; a sixth lens with negative optical power, which is a meniscus lens; a seventh lens with positive optical power; and an eighth lens with negative optical power. The optical lens provided by the application improves the imaging quality of the optical lens, reduces aberration, improves the imaging quality of the optical lens, and makes the lens have one or more advantages of super wide angle, high pixel, high imaging quality and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of imaging lenses, in particular to an optical lens. BACKGROUND

[0002] With the continuous progress of existing image processing algorithms and AI technology, high-definition wide-angle lenses, as a special type of optical lens, are widely used in action cameras, vehicle-mounted lenses, smart homes and other fields. Therefore, the requirements for high-definition wide-angle lenses are becoming higher and higher.

[0003] However, the existing high-definition wide-angle lens devices still have many shortcomings, such as the lens size is too long, the volume is large, the weight is heavy, which is not convenient for carrying; the field of view of the lens is increased, which leads to difficulty in system aberration correction and decline in imaging quality; the relative aperture of the lens is small, the light transmission performance is poor, and it cannot adapt to dark environments; and the existing lens imaging target surface is small, which is difficult to meet market demand.

[0004] Therefore, it is necessary to develop an optical lens with one or more advantages of ultra-wide angle, high imaging quality, high pixels, etc., so as to better meet the high market demand for high-definition wide-angle lenses. SUMMARY

[0005] In view of the above problems, the purpose of the present application is to provide an optical lens with one or more advantages of ultra-wide angle, high pixels, high imaging quality, etc.

[0006] The present application provides an optical lens, which comprises eight lenses arranged along the optical axis from the object side to the imaging surface, including: a first lens with negative focal power, the object side surface of which is convex, and the image side surface of which is concave; a second lens with negative focal power; a third lens with positive focal power; a fourth lens with positive focal power; a fifth lens with positive focal power, the object side surface of which is convex, and the image side surface of which is concave; a sixth lens with negative focal power, which is a meniscus lens; a seventh lens with positive focal power; and an eighth lens with negative focal power.

[0007] Further preferably, a reflective element is arranged between the third lens and the fourth lens, the surface of the reflective element facing the object side is an incident surface, and the surface of the reflective element facing the imaging surface is an exit surface.

[0008] Further preferably, the effective focal length f of the optical lens and the total optical length TTL satisfy: TTL / f < 25.0.

[0009] Further preferably, the total optical length TTL of the optical lens and the real image height IH corresponding to the maximum field of view angle satisfy: TTL / IH < 9.5.

[0010] It is further preferred that the effective focal length f of the optical lens and the radian θ of the maximum half field angle and the real image height IH corresponding to the maximum field angle satisfy: 0.55 < (IH / 2) / (f x θ) < 1.0.

[0011] It is further preferred that the effective focal length f of the optical lens and the optical back focal length BFL satisfy: BFL / f > 0.8.

[0012] It is further preferred that the effective focal length f of the optical lens, the maximum field angle FOV and the real image height IH corresponding to the maximum field angle satisfy: 58.0 < (f x FOV) / IH.

[0013] It is further preferred that the real image height IHm corresponding to the central field angle of the optical lens and the real image height IH corresponding to the maximum field angle satisfy: 0.51 ≤ IHm / IH.

[0014] It is further preferred that the focal length f1 of the first lens and the effective focal length f of the optical lens satisfy: f1 / f < -5.5.

[0015] It is further preferred that the focal length f2 of the second lens and the effective focal length f of the optical lens satisfy: f2 / f < -2.6.

[0016] It is further preferred that the focal length f3 of the third lens and the effective focal length f of the optical lens satisfy: 5.8 < f3 / f.

[0017] It is further preferred that the focal length f4 of the fourth lens and the effective focal length f of the optical lens satisfy: 4.4 < f4 / f.

[0018] It is further preferred that the focal length f5 of the fifth lens and the effective focal length f of the optical lens satisfy: 3.3 < f5 / f.

[0019] It is further preferred that the focal length f6 of the sixth lens and the effective focal length f of the optical lens satisfy: -6.5 < f6 / f < -1.2.

[0020] It is further preferred that the focal length f7 of the seventh lens and the effective focal length f of the optical lens satisfy: 1.2 < f7 / f < 5.5.

[0021] It is further preferred that the focal length f8 of the eighth lens and the effective focal length f of the optical lens satisfy: f8 / f < -4.5.

[0022] It is further preferred that the object side curvature radius R9 of the fifth lens and the image side curvature radius R10 satisfy: -0.95 < (R9-R10) / (R9+R10) < -0.4.

[0023] It is further preferred that the object-side surface curvature radius R11 of the sixth lens and the image-side surface curvature radius R12 satisfy: -0.95 < (R11-R12) / (R11+R12) < 1.0.

[0024] It is further preferred that the interval distance CT34 of the third lens and the fourth lens on the optical axis and the effective focal length f of the optical lens satisfy: 3.5 < CT34 / f < 9.5.

[0025] It is further preferred that the sum ∑CT of the central thicknesses of the first lens to the eighth lens and the total optical length TTL of the optical lens satisfy: 0.30 < ∑CT / TTL < 0.55.

[0026] The optical lens provided by the present application improves the imaging quality of the optical lens, reduces aberration, and improves the imaging quality of the optical lens by reasonable configuration of the surface shape of each lens and reasonable matching of the optical power, so that the optical lens has one or more advantages such as super wide angle, high pixel, and high imaging quality. BRIEF DESCRIPTION OF DRAWINGS

[0027] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description, taken in conjunction with the following drawings, in which:

[0028] Figure 1 The figure is a structure schematic diagram of the optical lens in the example of the present application.

[0029] Figure 2 The figure is a structure schematic diagram of the optical lens in the example 1 of the present application.

[0030] Figure 3 The figure is an MTF curve diagram of the optical lens in the example 1 of the present application.

[0031] Figure 4 The figure is a structure schematic diagram of the optical lens in the example 2 of the present application.

[0032] Figure 5 The figure is an MTF curve diagram of the optical lens in the example 2 of the present application.

[0033] Figure 6 The figure is a structure schematic diagram of the optical lens in the example 3 of the present application.

[0034] Figure 7 The figure is an MTF curve diagram of the optical lens in the example 3 of the present application.

[0035] Figure 8 The figure is a structure schematic diagram of the optical lens in the example 4 of the present application.

[0036] Figure 9 The figure is an MTF curve diagram of the optical lens in the example 4 of the present application.

[0037] Figure 10 Structure diagram of the optical lens in Embodiment 5 of the present application.

[0038] Figure 11 MTF curve diagram of the optical lens in Embodiment 5 of the present application.

[0039] Figure 12 Structure diagram of the optical lens in Embodiment 6 of the present application.

[0040] Figure 13 MTF curve diagram of the optical lens in Embodiment 6 of the present application.

[0041] Figure 14 Structure diagram of the optical lens in Embodiment 7 of the present application.

[0042] Figure 15 MTF curve diagram of the optical lens in Embodiment 7 of the present application.

[0043] Figure 16 Structure diagram of the optical lens in Embodiment 8 of the present application.

[0044] Figure 17 MTF curve diagram of the optical lens in Embodiment 8 of the present application.

[0045] Figure 18 Structure diagram of the optical lens in Embodiment 9 of the present application.

[0046] Figure 19 MTF curve diagram of the optical lens in Embodiment 9 of the present application.

[0047] Figure 20 Structure diagram of the optical lens in Embodiment 10 of the present application.

[0048] Figure 21 MTF curve diagram of the optical lens in Embodiment 10 of the present application.

[0049] Figure 22 Structure diagram of the optical lens in Embodiment 11 of the present application.

[0050] Figure 23 MTF curve diagram of the optical lens in Embodiment 11 of the present application.

[0051] Figure 24 Structure diagram of the optical lens in Embodiment 12 of the present application.

[0052] Figure 25 MTF curve diagram of the optical lens in Embodiment 12 of the present application.

[0053] Figure 26The structure diagram of the optical lens in the embodiment 13 of the present application.

[0054] Figure 27 The MTF curve diagram of the optical lens in the embodiment 13 of the present application.

[0055] Figure 28 The structure diagram of the optical lens in the embodiment 14 of the present application.

[0056] Figure 29 The MTF curve diagram of the optical lens in the embodiment 14 of the present application.

[0057] Figure 30 The structure diagram of the optical lens in the embodiment 15 of the present application.

[0058] Figure 31 The MTF curve diagram of the optical lens in the embodiment 15 of the present application.

[0059] Figure 32 The structure diagram of the optical lens in the embodiment 16 of the present application.

[0060] Figure 33 The MTF curve diagram of the optical lens in the embodiment 16 of the present application.

[0061] Figure 34 The structure diagram of the optical lens in the embodiment 17 of the present application.

[0062] Figure 35 The MTF curve diagram of the optical lens in the embodiment 17 of the present application.

[0063] Figure 36 The structure diagram of the optical lens in the embodiment 18 of the present application.

[0064] Figure 37 The MTF curve diagram of the optical lens in the embodiment 18 of the present application.

[0065] Figure 38 The structure diagram of the optical lens in the embodiment 19 of the present application.

[0066] Figure 39 The MTF curve diagram of the optical lens in the embodiment 19 of the present application.

[0067] Figure 40 The structure diagram of the optical lens in the embodiment 20 of the present application.

[0068] Figure 41 The MTF curve diagram of the optical lens in the embodiment 20 of the present application.

[0069] The following detailed description will further describe the present application in combination with the above-mentioned drawings. DETAILED DESCRIPTION

[0070] For a better understanding of the present application, various aspects of the present application will be described in more detail below with reference to the accompanying drawings. It is to be noted that these details are merely exemplary of the embodiments of the present application and are intended to provide an overview of the application as contemplated by the inventor. Throughout the specification, like drawing reference numbers are intended to refer to like parts throughout the specification and the claims. The expression "and / or" encompasses any and all combinations of one or more of the associated listed items.

[0071] It is to be noted that the terms first, second, third, etc. are merely used to distinguish one feature from another, and do not denote any limitation on the features. Thus, the first lens discussed below can also be referred to as the second lens or the third lens without departing from the teachings of the present application.

[0072] In the drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for the sake of explanation. Specifically, the shape of the spherical surface or aspherical surface shown in the drawings is shown by way of example. That is, the shape of the spherical surface or aspherical surface is not limited to the shape of the spherical surface or aspherical surface shown in the drawings. The drawings are merely examples and are not drawn to scale.

[0073] In this context, the paraxial region refers to a region near the optical axis. If a lens surface is convex and the position of the convex surface is not specified, it means that the lens surface is convex at least in the paraxial region. If a lens surface is concave and the position of the concave surface is not specified, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object is referred to as the object side surface of the lens, and the surface of each lens closest to the image plane is referred to as the image side surface of the lens.

[0074] It is also to be understood that the use of the terms "include", "includes", "including", "comprise", "comprises", "comprising", "have", "has", "having", or "contains" or "containing", when used in this specification, means that there are other items not listed which are also encompassed. Furthermore, when describing the embodiments of the present application, the use of "may" means "one or more embodiments of the present application". Also, the use of the term "exemplary" is intended to present an example or an illustration.

[0075] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an overly literal or overly formal sense unless expressly so defined herein.

[0076] It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other in the case of no conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0077] Examples

[0078] Please refer to Figure 1 The structure of the optical lens in the present application is shown in the schematic diagram. Figure 1 The difference between (A) and (B) is that the prism structure in (B) is a fold-back structure. The reason for this phenomenon is that a fold-back coordinate breakpoint is added to the prism during the design process, the target surface is changed to a reflecting mirror of the folded light path, the optical lens coordinate system after the prism is changed, and thus the curvature radius R and the thickness D of the lens after the prism are opposite to the distance L. It should be noted that the optical lens data of the fold-back structure is transformed into the optical lens of the straight-line structure in order to unify the coordinate system for the description and calculation of the optical lens, and it cannot be understood as a limitation of the patent scope of the present application. Figure 1 The difference between (A) and (C) is that the prism structure is cancelled in (C). The reason for this phenomenon is that the optical path of the optical lens is designed as a fold-back structure during the design process to facilitate the assembly in a narrow space. It should be noted that the purpose of adding the fold-back structure is to improve the compactness of the optical lens, so as to avoid the optical lens being too large to be assembled, and it cannot be understood as a limitation of the patent scope of the present application.

[0079] The optical lens provided by the embodiment of the present application has eight lenses, which are sequentially arranged along the optical axis from the object side to the imaging surface as the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens.

[0080] In some embodiments, the first lens can have a negative focal power, which is conducive to reducing the inclination angle of the incident light, thereby effectively sharing the large field of view on the object side. The object side of the first lens is convex, and the image side is concave, which is conducive to collecting as much edge field of view light as possible into the rear optical lens to realize large-angle light collection.

[0081] In some embodiments, the second lens can have a negative focal power, which is helpful for smooth transition of light, expansion of the field of view angle of the optical imaging lens, reduction of the difficulty of correcting distortion and chromatic aberration of the rear-end lens, and improvement of the image quality of the optical imaging lens. The second lens can have a convex object side and a concave image side, or both the object side and the image side are concave, or the object side is concave and the image side is convex.

[0082] In some embodiments, the third lens can have positive refractive power, which is conducive to improving the light converging capability of the optical lens, while balancing various aberrations generated by the optical lens, and improving the imaging quality of the optical lens. The third lens can have a convex object side surface and a concave image side surface, or both the object side surface and the image side surface are convex, or the object side surface is concave and the image side surface is convex.

[0083] In some embodiments, the fourth lens can have positive refractive power, which is conducive to improving the light converging capability of the optical lens, while balancing various aberrations of the optical lens, and improving the imaging quality of the optical lens. The fourth lens can have a convex object side surface and a concave image side surface, or both the object side surface and the image side surface are convex, or the object side surface is concave and the image side surface is convex.

[0084] In some embodiments, the fifth lens can have positive refractive power, which is conducive to improving the light converging capability of the optical lens, while balancing various aberrations of the optical lens, and improving the imaging quality of the optical lens. The fifth lens has a convex object side surface and a concave image side surface, which can reduce the requirement for the distance between the incident light and the optical axis, is conducive to the reduction of the front end aperture of the optical lens, and makes the light smoothly transition in the fifth lens; at the same time, it can reduce the deflection angle of the light, reduce the generation of aberration, and improve the imaging quality of the optical lens.

[0085] In some embodiments, the sixth lens can have negative refractive power, which is conducive to diverging the light converging through the fourth lens and the fifth lens, so that it can reach a higher imaging position. The sixth lens is a meniscus lens, which has a convex object side surface and a concave image side surface, or a concave object side surface and a convex image side surface, which can lower the height of the light in the lens, is conducive to the reduction of the rear end aperture of the optical lens; and can make the light trend smoothly, the light has no large deflection, reduce the ghost energy of the light reflection on the object side surface of the sixth lens, thereby reducing the ghost energy on the imaging picture.

[0086] In some embodiments, the seventh lens can have positive refractive power, which is conducive to further converging the light, and in combination with the sixth lens having negative refractive power, can play a role in correcting chromatic aberration. The seventh lens can have a convex object side surface and a concave image side surface, or both the object side surface and the image side surface are convex, or the object side surface is concave and the image side surface is convex.

[0087] In some embodiments, the eighth lens can have negative refractive power, which is conducive to diverging the incident light, so that the peripheral light and the central light are turned up and reach a higher imaging position. The eighth lens can have a convex object side surface and a concave image side surface, or both the object side surface and the image side surface are concave, or the object side surface is concave and the image side surface is convex.

[0088] In some embodiments, the optical lens can further comprise a diaphragm, which can be located between the fifth lens and the sixth lens. It can be understood that the diaphragm is used to limit the amount of light to change the brightness of the image. In addition, when the diaphragm is located between the fifth lens and the sixth lens, the diaphragm can reasonably distribute the functions of the first lens to the eighth lens, for example, the first lens, the second lens and the fifth lens can be used to receive light to a greater extent and reduce various types of aberrations, and the sixth lens to the eighth lens can be used to correct the function of the aberration, which is beneficial to balance the structure of the entire optical system. In addition, when the diaphragm is located between the fifth lens and the sixth lens, the diaphragm aberration correction is facilitated.

[0089] In some embodiments, the optical lens can further comprise a filter, which is arranged between the eighth lens and the imaging surface. The filter is used to filter out interference light to prevent the interference light from reaching the imaging surface of the optical lens and affecting normal imaging.

[0090] In some embodiments, in order to reduce the size of the optical lens, a reflection element with no optical power for light path folding can be arranged between the third lens and the fourth lens, and the reflection element is a prism. The surface of the prism towards the object side is an incident surface, and the surface towards the imaging surface is an exit surface. Both the incident surface and the exit surface are planes. The prism can be a right-angle prism. The light from the object side direction enters the prism from the incident surface, is reflected by the reflection surface, and then exits from the exit surface. By arranging the prism to bend the light path, the thickness of the lens can be effectively shortened.

[0091] In some embodiments, the effective focal length f of the optical lens and the total optical length TTL satisfy: TTL / f < 25.0. Satisfying the above range means that the optical length of the optical lens can be effectively limited, which is beneficial to realize the miniaturization of the optical lens.

[0092] In some embodiments, the total optical length TTL of the optical lens and the real image height IH corresponding to the maximum field of view angle satisfy: TTL / IH < 9.5. Satisfying the above range means that the total optical length and the image height of the optical lens can be effectively limited, which is beneficial to realize short total optical length and large image height.

[0093] In some embodiments, the effective focal length f of the optical lens, the radian θ of the maximum half field of view angle, and the real image height IH corresponding to the maximum field of view angle satisfy: 0.55 < (IH / 2) / (f x θ) < 1.0. Satisfying the above range means that the structure has high design flexibility, which can effectively control the distortion range and meet the requirements of different distortion algorithms.

[0094] In some embodiments, the effective focal length f of the optical lens and the optical back focal length BFL satisfy: BFL / f > 0.8. Satisfying the above range can make the lens have a larger back focus, which is beneficial to the assembly of the module, reduces interference, and improves the production yield.

[0095] In some embodiments, the effective focal length f, the maximum field of view FOV, and the real image height IH corresponding to the maximum field of view of the optical lens satisfy: 58.0 < (f x FOV) / IH. Satisfying the above range is conducive to meeting the requirement of a large field of view of the optical lens, while realizing a large image height and a long focal length, and is more conducive to realizing small distortion and improving the imaging quality of the optical lens.

[0096] In some embodiments, the real image height IHm corresponding to the central field of view of the optical lens and the real image height IH corresponding to the maximum field of view satisfy: 0.51 ≤ IHm / IH. Satisfying the above range can effectively increase the proportion of the central field of view imaging range in the entire imaging range, and compared with a lens with the same field of view, the proportion of the central field of view imaging range in the entire imaging range is larger, and more detailed information can be obtained.

[0097] In some embodiments, the focal length f1 of the first lens and the effective focal length f of the optical lens satisfy: f1 / f < -5.5. Satisfying the above range can make the first lens have appropriate negative refractive power, avoid excessive concentration of negative refractive power, and be conducive to increasing the field of view and collecting as much edge field of view light as possible into the rear optical lens to realize large-angle light collection.

[0098] In some embodiments, the focal length f2 of the second lens and the effective focal length f of the optical lens satisfy: f2 / f < -2.6. Satisfying the above range can make the second lens have appropriate negative refractive power, increase the field of view, and improve the imaging quality of the optical lens.

[0099] In some embodiments, the focal length f3 of the third lens and the effective focal length f of the optical lens satisfy: 5.8 < f3 / f. Satisfying the above range can make the third lens have appropriate positive refractive power, be conducive to improving the light convergence ability of the optical lens, and balance various aberrations generated by the optical lens to improve the imaging quality of the optical lens.

[0100] In some embodiments, the focal length f4 of the fourth lens and the effective focal length f of the optical lens satisfy: 4.4 < f4 / f. Satisfying the above range can make the fourth lens have appropriate positive refractive power, be conducive to improving the light convergence ability of the optical lens, and balance the aberration of the optical lens to improve the imaging quality of the optical lens.

[0101] In some embodiments, the focal length f5 of the fifth lens and the effective focal length f of the optical lens satisfy: 3.3 < f5 / f. Satisfying the above range can make the fifth lens have appropriate positive refractive power, be conducive to improving the light convergence ability of the optical lens, and balance the aberration of the optical lens to improve the imaging quality of the optical lens.

[0102] In some embodiments, the focal length f6 of the sixth lens and the effective focal length f of the optical lens satisfy: -6.5 < f6 / f < -1.2. Satisfying the above range, the sixth lens can have appropriate negative refractive power, which is conducive to diverging the light rays converging through the fourth lens and the fifth lens, and increasing the image height of the optical lens.

[0103] In some embodiments, the focal length f7 of the seventh lens and the effective focal length f of the optical lens satisfy: 1.2 < f7 / f < 5.5. Satisfying the above range, the seventh lens can have appropriate positive refractive power, which is conducive to suppressing the angle of the light rays exiting the edge field of view.

[0104] In some embodiments, the focal length f8 of the eighth lens and the effective focal length f of the optical lens satisfy: f8 / f < -4.5. Satisfying the above range, the eighth lens can have appropriate negative refractive power, which is conducive to diverging the light rays and making the peripheral light rays and the central light rays turn upward to reach a higher imaging position.

[0105] In some embodiments, the radius of curvature R9 of the object side surface of the fifth lens and the radius of curvature R10 of the image side surface satisfy: -0.95 < (R9-R10) / (R9+R10) < -0.4. Satisfying the above range, the requirement for the distance between the incident light rays and the optical axis can be reduced, which is conducive to reducing the front end aperture of the optical lens and making the light rays smoothly transition in the fifth lens; meanwhile, the deflection angle of the light rays can be reduced, the generation of aberration can be reduced, and the imaging quality of the optical lens can be improved.

[0106] In some embodiments, the radius of curvature R11 of the object side surface of the sixth lens and the radius of curvature R12 of the image side surface satisfy: -0.95 < (R11-R12) / (R11+R12) < 1.0. Satisfying the above range, the height of the light rays in the lens can be lowered, which is conducive to reducing the rear end aperture of the optical lens; and the light ray trend can be smooth, the light rays are not deflected greatly, the ghost energy of the light rays reflected on the object side surface of the sixth lens can be reduced, and thus the ghost energy on the imaging image can be reduced.

[0107] In some embodiments, the interval distance CT34 of the third lens and the fourth lens on the optical axis and the effective focal length f of the optical lens satisfy: 3.5 < CT34 / f < 9.5. Satisfying the above range, the folding structure of the optical lens can be realized, and the thickness of the lens can be reduced.

[0108] In some embodiments, the sum ∑CT of the central thicknesses of the lenses of the first lens to the eighth lens and the total optical length TTL of the optical lens satisfy: 0.30 < ∑CT / TTL < 0.55. Satisfying the above range, the total length and the volume of the optical lens can be compressed, and the miniaturization of the optical lens can be maintained.

[0109] In some embodiments, the optical lens satisfies the condition formula: FOV>190°, 34.0mm<TTL<35.5mm, 1.4mm<f<2.5mm, 3.5mm<IH<6.0mm, wherein, FOV represents the maximum field of view angle of the optical lens, TTL represents the total optical length of the optical lens, f represents the effective focal length of the optical lens, and IH represents the real image height corresponding to the maximum field of view angle of the optical lens. Satisfying the above condition indicates that the optical lens provided by the embodiments of the present application at least has one of the characteristics of super wide angle and large image surface.

[0110] In some embodiments, the sixth lens and the seventh lens can be cemented to form a cemented lens, which can effectively correct the chromatic aberration of the optical lens, reduce the eccentricity sensitivity of the optical lens, balance the aberration of the optical lens, and improve the imaging quality of the optical lens; and can also reduce the assembly sensitivity of the optical lens, thereby reducing the processing difficulty of the optical lens and improving the assembly yield of the optical lens.

[0111] In some embodiments, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens can adopt a spherical lens or an aspherical lens. Compared with a spherical structure, an aspherical structure can effectively reduce the aberration of the optical system, thereby reducing the number of lenses and the size of the lenses, and better realizing miniaturization of the lens. More specifically, the second lens, the third lens and the eighth lens in the optical lens provided by the present application can adopt an aspherical lens, and the first lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens can adopt a spherical lens.

[0112] In various embodiments of the present application, when the lens adopts an aspherical lens, the shape of each aspherical surface of the optical lens satisfies the following equation:

[0113]

[0114] wherein, z is the distance of the curved surface from the vertex of the curved surface in the direction of the optical axis, h is the distance from the optical axis to the curved surface, c is the curvature of the vertex of the curved surface, K is the quadratic surface coefficient, and B, C, D, E and F are respectively the fourth-order, sixth-order, eighth-order, tenth-order and twelfth-order surface coefficients.

[0115] The present application will be further described in the following embodiments. In various embodiments, the thickness, the radius of curvature and the material selection of each lens in the optical lens are different, and the specific differences can be referred to the parameter table of each embodiment. The following embodiments are only preferred embodiments of the present application, but the embodiments of the present application are not limited to the following embodiments only, and any changes, substitutions, combinations or simplifications made without departing from the innovative points of the present application should be regarded as equivalent replacement modes, and are included in the protection scope of the present application.

[0116] Embodiment 1

[0117] Referring to Figure 2 , a structural diagram of an optical lens provided in Embodiment 1 of the present application is shown, which comprises, along the optical axis from the object side to the imaging surface, a first lens L1, a second lens L2, a third lens L3, a prism, a fourth lens L4, a fifth lens L5, a stop ST, a sixth lens L6, a seventh lens L7, an eighth lens L8, and a filter G1.

[0118] The first lens L1 has negative focal power, the object side S1 is a convex surface, and the image side S2 is a concave surface; the second lens L2 has negative focal power, the object side S3 is a convex surface, and the image side S4 is a concave surface; the third lens L3 has positive focal power, the object side S5 is a concave surface, and the image side S6 is a convex surface; the prism has a plane as the incident surface toward the object side and a plane as the exit surface toward the imaging surface; the fourth lens L4 has positive focal power, the object side S7 and the image side S8 are both convex surfaces; the fifth lens L5 has positive focal power, the object side S9 is a convex surface, and the image side S10 is a concave surface; the sixth lens L6 has negative focal power, the object side S11 is a convex surface, and the image side S12 is a concave surface; the seventh lens L7 has positive focal power, the object side S12 is a convex surface, and the image side S13 is a concave surface, and the sixth lens L6 and the seventh lens L7 form a cemented lens with the cemented surface S12; the eighth lens L8 has negative focal power, the object side S14 is a convex surface, and the image side S15 is a concave surface; the object side S16 and the image side S17 of the filter G1 are both planes; and the imaging surface S18 is a plane.

[0119] The first lens L1, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7 are glass spherical lenses; and the second lens L2, the third lens L3, and the eighth lens L8 are glass aspherical lenses.

[0120] The related parameters of the lenses in the optical lens in Embodiment 1 are shown in Table 1-1.

[0121] Table 1-1

[0122]

[0123]

[0124] The surface type parameters of the aspherical lenses in the optical lens in Embodiment 1 are shown in Table 1-2.

[0125] Table 1-2

[0126] Figure 3 K B C D E F S3 -7.81E+01 0.00E+00 1.49E-05 2.36E-05 -4.61E-07 6.19E-09 S4 7.52E-01 0.00E+00 -1.97E-03 3.62E-05 -1.58E-06 -9.11E-08 S5 5.32E+00 0.00E+00 -1.94E-03 1.92E-05 -3.13E-06 4.25E-07 S6 -7.53E-01 0.00E+00 -3.55E-04 8.93E-06 7.27E-08 1.41E-08 S14 9.31E+00 0.00E+00 -9.33E-03 -6.19E-04 -1.84E-04 4.36E-05 S15 9.99E+00 0.00E+00 -5.90E-03 -1.48E-03 2.37E-04 -4.11E-05

[0127] In this embodiment, Figure 4The MTF (Modulation Transfer Function) curve of the embodiment 1 is shown, which represents the lens imaging modulation degree of different spatial frequencies under each field of view, the horizontal axis represents the spatial frequency (unit: lp / mm), and the vertical axis represents the MTF value. It can be seen from the figure that the MTF value of the embodiment is above 0.5 in the full field of view, and in the range of 0-230 lp / mm, the MTF curve uniformly and smoothly decreases from the center to the edge of the field of view, and has excellent imaging quality and excellent detail resolution capability in the case of low frequency and high frequency.

[0128] Embodiment 2

[0129] Please refer to Figure 5 , which is a structural schematic diagram of the optical lens provided in the embodiment 2 of the present application, and compared with the embodiment 1, the main difference of the embodiment is that the optical parameters such as the curvature radius of each lens surface and the lens thickness are different.

[0130] The related parameters of each lens in the optical lens in the embodiment 2 are shown in Table 2-1.

[0131] Table 2-1

[0132]

[0133]

[0134] The surface type parameters of the aspherical lens of the optical lens in the embodiment 2 are shown in Table 2-2.

[0135] Table 2-2

[0136] Figure 6 K B C D E F S3 -3.72E+00 0.00E+00 1.45E-03 -2.75E-05 -1.35E-07 6.32E-09 S4 2.74E+01 0.00E+00 2.80E-03 -4.64E-05 4.07E-06 -5.25E-08 S5 -1.66E+02 0.00E+00 -9.68E-04 4.09E-05 -2.40E-06 1.82E-07 S6 -1.38E+00 0.00E+00 8.43E-05 -7.29E-07 -3.10E-07 4.12E-08 S14 -1.09E+01 0.00E+00 -5.67E-03 -3.82E-05 -5.66E-04 1.36E-04 S15 -3.65E+00 0.00E+00 -5.66E-03 -2.99E-04 -1.45E-04 2.21E-05

[0137] It can be seen from Figure 7 that the MTF value of the embodiment is above 0.45 in the full field of view, and in the range of 0-230 lp / mm, the MTF curve uniformly and smoothly decreases from the center to the edge of the field of view, and has good imaging quality and good detail resolution capability in the case of low frequency and high frequency.

[0138] Embodiment 3

[0139] Please refer to Figure 8 , which is a structural schematic diagram of the optical lens provided in the embodiment 3 of the present application, and compared with the embodiment 1, the main difference of the embodiment is that the optical parameters such as the curvature radius of each lens surface and the lens thickness are different.

[0140] The related parameters of each lens in the optical lens in the embodiment 3 are shown in Table 3-1.

[0141] Table 3-1

[0142]

[0143]

[0144] The surface shape parameters of the aspherical lens of the optical lens in Example 3 are shown in Table 3-2.

[0145] Table 3-2

[0146] Figure 9 K B C D E F S3 -2.54E+00 0.00E+00 2.27E-03 -3.79E-05 3.14E-07 -1.16E-09 S4 -9.63E+00 0.00E+00 2.12E-03 -2.01E-06 6.04E-07 3.69E-08 S5 -3.00E+02 0.00E+00 -1.96E-03 1.34E-05 -3.73E-07 2.92E-08 S6 -1.50E-01 0.00E+00 -2.18E-04 -2.62E-06 1.06E-07 4.55E-10 S14 -3.37E+00 0.00E+00 -2.86E-03 1.80E-04 -4.75E-04 7.54E-05 S15 -3.74E-01 0.00E+00 -3.08E-03 -1.70E-05 -2.68E-04 3.23E-05

[0147] It can be seen from Figure 10 that the MTF value of the present embodiment is above 0.3 in the full field of view, and in the range of 0-230 lp / mm, the MTF curve uniformly and smoothly decreases from the center to the edge of the field of view, and has good imaging quality and good detail resolution ability in low and high frequency cases.

[0148] Example 4

[0149] Please refer to Figure 11 , which is a structural schematic diagram of the optical lens provided in Example 4 of the present application. Compared with Example 1, the main difference of the present embodiment is that the optical parameters such as the radius of curvature of each lens surface and the lens thickness are different.

[0150] The related parameters of each lens in the optical lens in Example 4 are shown in Table 4-1.

[0151] Table 4-1

[0152]

[0153]

[0154] The surface shape parameters of the aspherical lens of the optical lens in Example 4 are shown in Table 4-2.

[0155] Table 4-2

[0156] Figure 12 K B C D E F S3 -3.31E+00 0.00E+00 1.52E-03 -2.08E-05 1.97E-07 -5.30E-10 S4 -8.20E+00 0.00E+00 6.72E-04 2.99E-05 -3.76E-07 1.23E-08 S5 5.58E+00 0.00E+00 -1.63E-03 3.13E-06 3.20E-06 -5.64E-08 S6 -1.03E+01 0.00E+00 -1.15E-03 5.23E-05 -1.38E-06 3.89E-08 S14 1.28E+02 0.00E+00 -8.08E-03 1.98E-04 -3.17E-04 4.51E-05 S15 4.61E+01 0.00E+00 -3.25E-03 2.51E-05 2.71E-05 -6.80E-06

[0157] It can be seen from Figure 13 that the MTF value of the present embodiment is above 0.4 in the full field of view, and in the range of 0-230 lp / mm, the MTF curve uniformly and smoothly decreases from the center to the edge of the field of view, and has good imaging quality and good detail resolution ability in low and high frequency cases.

[0158] Example 5

[0159] Please refer to Figure 14 , which is a structural schematic diagram of the optical lens provided in Example 5 of the present application. Compared with Example 1, the main difference of the present embodiment is that the optical parameters such as the radius of curvature of each lens surface and the lens thickness are different.

[0160] The related parameters of the lenses in the optical lens in embodiment 5 are shown in table 5-1.

[0161] Table 5-1

[0162]

[0163]

[0164] The surface profile parameters of the aspheric lenses of the optical lens in embodiment 5 are shown in table 5-2.

[0165] Table 5-2

[0166] Figure 15 K B C D E F S3 -2.05E+00 0.00E+00 2.51E-03 -4.74E-05 5.38E-07 -2.76E-09 S4 -3.13E+00 0.00E+00 2.57E-03 -2.72E-05 7.70E-07 -7.12E-09 S5 -4.60E+00 0.00E+00 5.97E-04 5.49E-06 5.29E-07 -3.06E-08 S6 1.25E+00 0.00E+00 2.20E-03 2.05E-05 1.09E-05 -6.39E-07 S14 1.25E+01 0.00E+00 -8.53E-03 -3.04E-04 -7.87E-05 3.02E-05 S15 2.86E+00 0.00E+00 -8.79E-03 -1.31E-03 9.68E-05 -6.65E-05

[0167] It can be seen from Figure 16 that the MTF values of the embodiment are all above 0.4 in the full field of view, and in the range of 0-230 lp / mm, the MTF curves uniformly and smoothly decrease from the center to the edge of the field of view, and have good imaging quality and good detail resolution ability in the low frequency and high frequency cases.

[0168] Embodiment 6

[0169] Please refer to Figure 17 , which is a structural schematic diagram of the optical lens provided in embodiment 6 of the application, and the main difference between the embodiment and embodiment 1 is that the optical parameters such as the radii of curvature of the lens surfaces and the lens thicknesses are different.

[0170] The related parameters of the lenses in the optical lens in embodiment 6 are shown in table 6-1.

[0171] Table 6-1

[0172]

[0173]

[0174] The surface profile parameters of the aspheric lenses of the optical lens in embodiment 6 are shown in table 6-2.

[0175] Table 6-2

[0176] Figure 18 K B C D E F S3 -3.02E+00 0.00E+00 1.81E-03 -3.17E-05 3.19E-07 -1.48E-09 S4 -1.13E+01 0.00E+00 2.68E-03 -4.30E-05 2.18E-06 -1.84E-08 S5 -2.90E-01 0.00E+00 -2.21E-04 2.73E-06 1.51E-06 -5.51E-08 S6 2.46E+00 0.00E+00 2.21E-03 -1.13E-04 1.95E-05 -1.19E-06 S14 6.50E+01 0.00E+00 -1.10E-02 -3.26E-04 -2.85E-04 5.90E-05 S15 3.34E+00 0.00E+00 -4.82E-03 5.77E-05 -7.78E-05 2.98E-06

[0177] It can be seen from Figure 19 that the MTF values of the embodiment are all above 0.45 in the full field of view, and in the range of 0-230 lp / mm, the MTF curves uniformly and smoothly decrease from the center to the edge of the field of view, and have good imaging quality and good detail resolution ability in the low frequency and high frequency cases.

[0178] Embodiment 7

[0179] Referring to FIG. 7, a structural schematic diagram of an optical lens provided in Embodiment 7 of the present application is shown. Compared with Embodiment 1, the main difference between Embodiment 7 and Embodiment 1 is that the optical parameters such as the radius of curvature of each lens surface and the thickness of the lens are different. Figure 20 The related parameters of each lens in the optical lens in Embodiment 7 are shown in Table 7-1.

[0180] Table 7-1

[0181]

[0182]

[0183] The surface type parameters of the aspherical lens of the optical lens in Embodiment 7 are shown in Table 7-2.

[0184] Table 7-2

[0185]

[0186] Figure 21 K B C D E F S3 -3.95E+00 0.00E+00 1.81E-03 -7.56E-05 1.50E-06 -1.10E-08 S4 3.00E+02 0.00E+00 2.61E-03 -4.70E-05 9.88E-07 -1.03E-07 S5 1.28E+02 0.00E+00 -1.66E-03 6.46E-05 -3.36E-06 3.86E-08 S6 6.46E+00 0.00E+00 -5.24E-05 8.99E-06 -4.25E-07 3.71E-08 S14 2.79E+02 0.00E+00 -8.96E-03 4.82E-05 -1.65E-04 1.42E-05 S15 2.37E+00 0.00E+00 -8.07E-03 4.02E-04 -7.38E-05 6.43E-06

[0187] As can be seen from FIG. 8, the MTF value of this embodiment is above 0.45 in the full field of view, and the MTF curve uniformly and smoothly decreases from the center to the edge of the field of view in the range of 0-230 lp / mm, and has good imaging quality and good detail resolution ability in the case of low frequency and high frequency. Figure 22 Embodiment 8

[0188] Referring to FIG. 8, a structural schematic diagram of an optical lens provided in Embodiment 8 of the present application is shown. Compared with Embodiment 1, the main difference between Embodiment 8 and Embodiment 1 is that the optical parameters such as the radius of curvature of each lens surface and the thickness of the lens are different.

[0189] Figure 23 The related parameters of each lens in the optical lens in Embodiment 8 are shown in Table 8-1.

[0190] Table 8-1

[0191]

[0192]

[0193] The surface type parameters of the aspherical lens of the optical lens in Embodiment 8 are shown in Table 8-2.

[0194] Table 8-2

[0195]

[0196] Figure 24 K B C D E F S3 -8.73E+00 0.00E+00 3.68E-04 -9.22E-06 7.80E-08 -7.22E-12 S4 1.56E+00 0.00E+00 1.74E-03 -5.86E-05 2.03E-06 -5.62E-08 S5 -8.93E+00 0.00E+00 1.42E-03 -3.09E-05 1.27E-06 -1.87E-08 S6 -3.00E+02 0.00E+00 1.29E-03 3.29E-06 1.36E-06 4.82E-08 S14 -2.25E+01 0.00E+00 -2.13E-03 -1.98E-03 -1.97E-05 -2.27E-05 S15 -1.57E+01 0.00E+00 1.12E-03 -1.38E-03 4.86E-06 6.54E-06

[0197] As can be seen from FIG. 8, the MTF value of this embodiment is above 0.45 in the full field of view, and the MTF curve uniformly and smoothly decreases from the center to the edge of the field of view in the range of 0-230 lp / mm, and has good imaging quality and good detail resolution ability in the case of low frequency and high frequency.​​​Figure 25 It can be seen from the that the MTF value of the embodiment is above 0.45 in the full field of view, and in the range of 0-230 lp / mm, the MTF curve uniformly and smoothly decreases from the center to the edge of the field of view, and has good imaging quality and good detail resolution ability in the case of low frequency and high frequency.

[0198] Embodiment 9

[0199] Referring to Figure 26 , a structural schematic diagram of an optical lens provided in the embodiment 9 of the present application is shown, and compared with the embodiment 1, the main difference is that the optical parameters such as the radius of curvature of each lens surface and the lens thickness are different.

[0200] The related parameters of each lens in the optical lens in the embodiment 9 are shown in Table 9-1.

[0201] Table 9-1

[0202]

[0203]

[0204] The surface type parameters of the aspherical lens of the optical lens in the embodiment 9 are shown in Table 9-2.

[0205] Table 9-2

[0206] Figure 27 K B C D E F S3 -5.02E+00 0.00E+00 1.34E-03 -2.06E-05 1.01E-07 2.10E-10 S4 -3.00E+02 0.00E+00 2.90E-03 -4.30E-05 3.20E-06 -2.51E-08 S5 5.56E+01 0.00E+00 -1.13E-03 2.90E-05 -8.61E-07 6.38E-08 S6 -5.03E-01 0.00E+00 -1.94E-05 6.46E-06 -2.04E-07 2.19E-08 S14 8.65E+00 0.00E+00 -1.24E-02 -2.82E-04 -3.28E-04 8.16E-06 S15 3.88E+00 0.00E+00 -8.94E-03 -2.26E-04 -1.31E-04 5.90E-06

[0207] It can be seen from the Figure 28 that the MTF value of the embodiment is above 0.4 in the full field of view, and in the range of 0-230 lp / mm, the MTF curve uniformly and smoothly decreases from the center to the edge of the field of view, and has good imaging quality and good detail resolution ability in the case of low frequency and high frequency.

[0208] Embodiment 10

[0209] Referring to Figure 29 , a structural schematic diagram of an optical lens provided in the embodiment 10 of the present application is shown, and compared with the embodiment 1, the main difference is that the optical parameters such as the radius of curvature of each lens surface and the lens thickness are different.

[0210] The related parameters of each lens in the optical lens in the embodiment 10 are shown in Table 10-1.

[0211] Table 10-1

[0212]

[0213]

[0214] ​​​​​​The surface shape parameters of the aspherical lens of the optical lens in Embodiment 10 are shown in Table 10-2.

[0215] Table 10-2

[0216] Figure 30 K B C D E F S3 -4.39E+00 0.00E+00 9.15E-04 -1.52E-05 -4.70E-08 3.19E-09 S4 6.72E+00 0.00E+00 2.92E-03 -2.80E-05 1.86E-06 2.36E-07 S5 -2.83E+02 0.00E+00 -8.64E-05 1.17E-05 -3.48E-07 2.51E-07 S6 -1.79E+00 0.00E+00 4.18E-05 5.69E-06 -3.28E-08 5.40E-08 S14 -9.86E+01 0.00E+00 -9.28E-03 1.27E-04 -1.11E-04 6.61E-05 S15 2.61E+01 0.00E+00 -7.84E-03 5.82E-04 6.82E-05 2.55E-05

[0217] As can be seen from Figure 31 , the MTF value of the present embodiment is above 0.45 in the full field of view, and in the range of 0-230 lp / mm, the MTF curve uniformly and smoothly decreases from the center to the edge of the field of view, and has good imaging quality and good detail resolution ability in low and high frequency cases.

[0218] Embodiment 11

[0219] Referring to Figure 32 , the structural schematic diagram of the optical lens provided in Embodiment 11 of the present application is shown, and the present embodiment mainly differs from Embodiment 1 in that the optical parameters such as the radii of curvature of the lens surfaces and the lens thicknesses are different.

[0220] The related parameters of the lenses in the optical lens in Embodiment 11 are shown in Table 11-1.

[0221] Table 11-1

[0222]

[0223]

[0224] The surface shape parameters of the aspherical lens of the optical lens in Embodiment 11 are shown in Table 11-2.

[0225] Table 11-2

[0226] Figure 33 K B C D E F S3 -6.68E+00 0.00E+00 8.03E-04 -1.70E-05 1.82E-07 -7.04E-10 S4 1.02E+01 0.00E+00 1.84E-03 -2.74E-05 -2.47E-07 -3.36E-09 S5 -3.00E+02 0.00E+00 -2.52E-04 -2.94E-06 -1.96E-06 8.93E-08 S6 -2.01E+00 0.00E+00 8.79E-05 -4.04E-06 6.74E-09 3.36E-08 S14 5.95E+00 0.00E+00 -9.88E-03 -1.98E-04 -2.20E-04 3.43E-06 S15 4.49E+00 0.00E+00 -7.50E-03 -1.48E-04 -9.68E-05 4.55E-06

[0227] As can be seen from Figure 34 , the MTF value of the present embodiment is above 0.4 in the full field of view, and in the range of 0-230 lp / mm, the MTF curve uniformly and smoothly decreases from the center to the edge of the field of view, and has good imaging quality and good detail resolution ability in low and high frequency cases.

[0228] Embodiment 12

[0229] Referring to Figure 35 , the structural schematic diagram of the optical lens provided in Embodiment 12 of the present application is shown, and the present embodiment mainly differs from Embodiment 1 in that the optical parameters such as the radii of curvature of the lens surfaces and the lens thicknesses are different.

[0230] The related parameters of the lenses in the optical lens in Embodiment 12 are shown in Table 12-1.

[0231] Table 12-1

[0232]

[0233]

[0234] The surface shape parameters of the aspheric lenses of the optical lens in Embodiment 12 are shown in Table 12-2.

[0235] Table 12-2

[0236] Figure 36 K B C D E F S3 -3.92E+00 0.00E+00 1.00E-03 -1.71E-05 1.03E-07 5.31E-11 S4 1.59E+01 0.00E+00 2.23E-03 -2.67E-05 9.64E-07 8.05E-08 S5 -3.00E+02 0.00E+00 -5.62E-04 -7.43E-06 -1.26E-06 1.41E-07 S6 -1.96E+00 0.00E+00 9.71E-05 -1.13E-06 -1.22E-07 5.42E-08 S14 8.14E+00 0.00E+00 -9.02E-03 -3.14E-04 -2.71E-04 2.76E-05 S15 3.70E+00 0.00E+00 -6.71E-03 -2.79E-04 -5.03E-05 1.31E-05

[0237] As can be seen from Figure 37 , the MTF values of this embodiment are all above 0.45 in the full field of view, and in the range of 0-230 lp / mm, the MTF curves uniformly and smoothly decrease from the center to the edge of the field of view, and have good imaging quality and good detail resolution ability in the low frequency and high frequency cases.

[0238] Embodiment 13

[0239] Referring to Figure 38 , a structural schematic diagram of an optical lens provided in Embodiment 13 of the present application is shown, and compared with Embodiment 1, the main difference is that the optical parameters such as the radii of curvature of the lens surfaces and the lens thicknesses are different.

[0240] The related parameters of the lenses in the optical lens in Embodiment 13 are shown in Table 13-1.

[0241] Table 13-1

[0242]

[0243]

[0244] The surface shape parameters of the aspheric lenses of the optical lens in Embodiment 13 are shown in Table 13-2.

[0245] Table 13-2

[0246] Figure 39 K B C D E F S3 -4.69E+00 0.00E+00 8.47E-04 -1.65E-05 1.17E-07 1.21E-10 S4 5.80E+00 0.00E+00 2.65E-03 -3.88E-05 2.04E-06 1.07E-07 S5 -2.82E+02 0.00E+00 2.92E-05 1.42E-05 -7.08E-07 1.63E-07 S6 -4.70E+00 0.00E+00 3.16E-04 8.25E-06 4.41E-07 5.68E-08 S14 2.57E+01 0.00E+00 -7.05E-03 -9.61E-05 -2.20E-04 2.18E-05 S15 7.33E+00 0.00E+00 -4.17E-03 1.81E-06 -1.05E-05 4.81E-06

[0247] As can be seen from Figure 40 , the MTF values of this embodiment are all above 0.45 in the full field of view, and in the range of 0-230 lp / mm, the MTF curves uniformly and smoothly decrease from the center to the edge of the field of view, and have good imaging quality and good detail resolution ability in the low frequency and high frequency cases.

[0248] Example 14

[0249] Please see Figure 41 The figure shown is a schematic diagram of the optical lens provided in Embodiment 14 of the present invention. Compared with Embodiment 1, the main difference in this embodiment is that the optical parameters such as the radius of curvature of each lens surface and the lens thickness are different.

[0250] The relevant parameters of each lens in the optical lens of Example 14 are shown in Table 14-1.

[0251] Table 14-1

[0252]

[0253]

[0254] The surface profile parameters of the aspherical lens in the optical lens of Example 14 are shown in Table 14-2.

[0255] Table 14-2

[0256] ​ K B C D E F S3 -9.47E+00 0.00E+00 3.19E-05 -2.02E-05 6.71E-07 1.87E-09 S4 4.37E+00 0.00E+00 1.21E-03 -1.02E-04 -1.38E-06 -2.48E-07 S5 -3.43E+01 0.00E+00 -1.10E-03 -1.14E-04 -2.58E-06 2.41E-07 S6 1.31E+02 0.00E+00 -1.12E-03 -2.63E-05 -1.45E-06 4.47E-07 S14 -2.89E+02 0.00E+00 -3.38E-03 2.88E-04 -1.52E-04 2.87E-05 S15 -3.96E+01 0.00E+00 1.02E-03 4.35E-04 3.57E-05 1.77E-05

[0257] from ​ As can be seen, the MTF value of this embodiment is above 0.5 throughout the entire field of view. In the range of 0 to 230 lp / mm, the MTF curve decreases smoothly and evenly from the center to the edge of the field of view, demonstrating excellent imaging quality and excellent detail resolution in both low and high frequency conditions.

[0258] Example 15

[0259] Please see ​ The figure shown is a schematic diagram of the optical lens provided in Embodiment 15 of the present invention. Compared with Embodiment 1, the main difference in this embodiment is that the optical parameters such as the radius of curvature of each lens surface and the lens thickness are different.

[0260] The relevant parameters of each lens in the optical lens of Example 15 are shown in Table 15-1.

[0261] Table 15-1

[0262]

[0263]

[0264] The surface profile parameters of the aspherical lens in the optical lens of Example 15 are shown in Table 15-2.

[0265] Table 15-2

[0266] ​ K B C D E F S3 -4.03E+00 0.00E+00 1.20E-03 -3.14E-05 1.39E-07 4.90E-09 S4 1.38E+01 0.00E+00 3.08E-03 -2.19E-05 5.48E-06 4.90E-08 S5 3.00E+02 0.00E+00 -1.52E-03 8.98E-05 -7.00E-07 1.98E-07 S6 -7.77E-01 0.00E+00 -7.07E-06 1.06E-05 -1.98E-07 3.48E-08 S14 2.99E+02 0.00E+00 -9.64E-03 9.21E-04 -4.56E-04 3.05E-04 S15 -1.42E+02 0.00E+00 -1.10E-02 3.09E-04 -7.47E-05 5.89E-05

[0267] It can be seen from ​ The MTF value of the embodiment is above 0.55 in the full field of view, and in the range of 0-230 lp / mm, the MTF curve uniformly and smoothly decreases from the center to the edge of the field of view, and has excellent imaging quality and excellent detail resolution capability in the case of low frequency and high frequency.

[0268] Embodiment 16

[0269] Referring to ​ , which is a structural schematic diagram of an optical lens provided in the embodiment 16 of the present application, compared with the embodiment 1, the main difference is that the optical parameters such as the radius of curvature of each lens surface and the lens thickness are different.

[0270] The related parameters of each lens in the optical lens in the embodiment 16 are shown in Table 16-1.

[0271] Table 16-1

[0272]

[0273] The surface type parameters of the aspherical lens of the optical lens in the embodiment 16 are shown in Table 16-2.

[0274] Table 16-2

[0275] ​ K B C D E F S3 -4.68E+00 0.00E+00 1.52E-03 -4.64E-05 6.47E-07 -2.56E-09 S4 -1.10E+02 0.00E+00 5.96E-03 -3.76E-04 2.93E-05 -1.02E-06 S5 -2.37E+02 0.00E+00 -1.48E-03 2.36E-05 5.25E-06 -3.38E-07 S6 3.42E+00 0.00E+00 6.08E-04 2.42E-05 -6.38E-07 7.09E-08 S14 2.81E+02 0.00E+00 -9.10E-03 7.94E-04 -7.20E-04 2.16E-04 S15 -3.00E+02 0.00E+00 -9.19E-03 6.17E-04 -2.59E-04 5.90E-05

[0276] It can be seen from ​ The MTF value of the embodiment is above 0.5 in the full field of view, and in the range of 0-230 lp / mm, the MTF curve uniformly and smoothly decreases from the center to the edge of the field of view, and has excellent imaging quality and excellent detail resolution capability in the case of low frequency and high frequency.

[0277] Embodiment 17

[0278] Referring to ​ , which is a structural schematic diagram of an optical lens provided in the embodiment 17 of the present application, compared with the embodiment 1, the main difference is that the optical parameters such as the radius of curvature of each lens surface and the lens thickness are different.

[0279] The related parameters of each lens in the optical lens in the embodiment 17 are shown in Table 17-1.

[0280] Table 17-1

[0281]

[0282] The surface type parameters of the aspherical lens of the optical lens in the embodiment 17 are shown in Table 17-2.

[0283] Table 17-2

[0284] ​ K B C D E F S3 -4.58E+00 0.00E+00 8.61E-04 -1.58E-05 1.77E-07 -1.30E-09 S4 8.13E+00 0.00E+00 1.86E-03 -3.67E-05 -2.23E-08 6.17E-08 S5 -3.00E+02 0.00E+00 -1.98E-04 -1.86E-05 -1.84E-06 1.33E-07 S6 -3.25E+00 0.00E+00 1.64E-04 -4.64E-06 7.76E-09 5.42E-08 S14 1.00E+01 0.00E+00 -8.37E-03 -4.37E-04 -2.04E-04 1.67E-05 S15 4.17E+00 0.00E+00 -5.54E-03 -3.23E-04 -6.53E-05 1.15E-05

[0285] As can be seen from ​ , the MTF value of the embodiment is above 0.45 in the full field of view, and in the range of 0-230 lp / mm, the MTF curve uniformly and smoothly decreases from the center to the edge of the field of view, and has good imaging quality and good detail resolution ability in the case of low frequency and high frequency.

[0286] Embodiment 18

[0287] Please refer to ​ , which is a structural schematic diagram of the optical lens provided in the embodiment 18 of the application, and compared with the embodiment 1, the main difference is that the optical parameters such as the radius of curvature of each lens surface and the lens thickness are different.

[0288] The related parameters of each lens in the optical lens in the embodiment 18 are shown in Table 18-1.

[0289] Table 18-1

[0290]

[0291] The surface type parameters of the aspherical lens of the optical lens in the embodiment 18 are shown in Table 18-2.

[0292] Table 18-2

[0293] ​ K B C D E F S3 -4.51E+00 0.00E+00 8.01E-04 -1.90E-05 2.14E-07 -8.35E-10 S4 1.48E+01 0.00E+00 2.53E-03 -6.97E-05 3.74E-06 -8.79E-08 S5 9.30E+00 0.00E+00 -8.32E-06 1.69E-05 1.34E-07 -8.71E-09 S6 -2.92E+02 0.00E+00 5.21E-04 3.18E-05 -1.44E-07 4.52E-08 S14 1.10E+02 0.00E+00 -1.25E-02 -8.33E-05 -3.03E-04 2.51E-05 S15 3.00E+02 0.00E+00 -9.77E-03 2.79E-04 -7.19E-05 8.75E-06

[0294] As can be seen from ​ , the MTF value of the embodiment is above 0.45 in the full field of view, and in the range of 0-230 lp / mm, the MTF curve uniformly and smoothly decreases from the center to the edge of the field of view, and has good imaging quality and good detail resolution ability in the case of low frequency and high frequency.

[0295] Embodiment 19

[0296] Please refer to ​ , which is a structural schematic diagram of the optical lens provided in the embodiment 19 of the application, and compared with the embodiment 1, the main difference is that the optical parameters such as the radius of curvature of each lens surface and the lens thickness are different.

[0297] The related parameters of each lens in the optical lens in the embodiment 19 are shown in Table 19-1.

[0298] Table 19-1

[0299]

[0300] The surface shape parameters of the aspherical lenses of the optical lens in embodiment 19 are shown in table 19-2.

[0301] Table 19-2

[0302] ​ K B C D E F S3 -2.46E+00 0.00E+00 1.97E-03 -3.44E-05 3.75E-07 -1.93E-09 S4 -6.99E-01 0.00E+00 3.60E-03 -5.03E-05 1.48E-06 -1.52E-08 S5 -1.43E+01 0.00E+00 1.36E-03 -2.38E-05 1.34E-06 -4.20E-08 S6 -3.43E+00 0.00E+00 1.88E-03 5.27E-05 1.36E-06 -1.10E-07 S14 2.85E+02 0.00E+00 -5.47E-03 1.33E-04 -1.94E-04 4.49E-05 S15 3.48E+01 0.00E+00 -2.19E-03 -1.29E-04 2.78E-05 -8.60E-06

[0303] As can be seen from ​ , the MTF values of the embodiment are all above 0.4 in the full field of view, and in the range of 0-230 lp / mm, the MTF curves uniformly and smoothly decrease from the center to the edge of the field of view, and have good imaging quality and good detail resolution ability in low and high frequency cases.

[0304] Embodiment 20

[0305] Please refer to ​ , which is a structural schematic diagram of the optical lens provided in embodiment 20 of the application, and compared with embodiment 1, the main difference is that the optical parameters such as the prism, the radius of curvature of each lens surface, and the lens thickness are different.

[0306] The related parameters of each lens in the optical lens in embodiment 20 are shown in table 20-1.

[0307] Table 20-1

[0308]

[0309] The surface shape parameters of the aspherical lenses of the optical lens in embodiment 20 are shown in table 20-2.

[0310] Table 20-2

[0311] ​ K B C D E F S3 -1.62E+01 0.00E+00 -4.09E-04 2.16E-05 -1.70E-07 4.85E-10 S4 4.76E-01 0.00E+00 -1.70E-03 -1.35E-06 -1.96E-06 4.38E-08 S5 6.36E+00 0.00E+00 -1.27E-03 -2.22E-05 -3.48E-06 3.17E-07 S6 -5.95E-01 0.00E+00 -3.69E-04 -5.28E-06 3.72E-07 -2.56E-09 S14 1.26E+01 0.00E+00 -1.01E-02 -4.56E-05 -5.73E-04 9.77E-05 S15 1.55E+01 0.00E+00 -6.94E-03 -7.54E-04 -6.45E-05 -9.61E-06

[0312] As can be seen from ​ , the MTF values of the embodiment are all above 0.5 in the full field of view, and in the range of 0-230 lp / mm, the MTF curves uniformly and smoothly decrease from the center to the edge of the field of view, and have excellent imaging quality and excellent detail resolution ability in low and high frequency cases.

[0313] Please refer to table 21, which is the optical characteristics corresponding to each of the above embodiments, including the effective focal length f, the total optical length TTL, the aperture value Fno, the real image height IH, the entrance pupil diameter EPD, the chief ray angle of incidence CRA at the maximum image height, the maximum field of view angle FOV of the optical lens, and the numerical values corresponding to each conditional expression in each embodiment.

[0314] Table 21

[0315]

[0316]

[0317] Table 21

[0318]

[0319]

[0320] Table 21

[0321]

[0322] Table 21

[0323]

[0324]

[0325] In summary of the above embodiments, the optical lens provided by the present application improves the imaging quality of the optical lens, reduces aberration, and improves the imaging quality of the optical lens by reasonable configuration of each lens surface and reasonable matching of optical power, so that the lens has one or more advantages such as super wide angle, high pixel, and high imaging quality.

[0326] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0327] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the patent of the present application. It should be noted that, for ordinary skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. An optical lens, eight pieces of lenses in total, characterized in that, In order from the object side to the imaging plane along the optical axis, the optical lens comprises: a first lens with negative refractive power, the object side surface of which is convex, and the image side surface of which is concave; a second lens with negative refractive power; a third lens with positive refractive power; a fourth lens with positive refractive power; a fifth lens with positive refractive power, the object side surface of which is convex, and the image side surface of which is concave; a sixth lens with negative refractive power, which is a meniscus lens; a seventh lens with positive refractive power; an eighth lens with negative refractive power; The focal length f1 of the first lens and the effective focal length f of the optical lens satisfy: -10.07≤f1 / f<-5.5; The focal length f2 of the second lens and the effective focal length f of the optical lens satisfy: -9.52≤f2 / f<-2.6; The object side surface curvature radius R11 of the sixth lens and the image side surface curvature radius R12 satisfy: -0.95<(R11-R12) / (R11+R12)<1.0; The focal length f4 of the fourth lens and the effective focal length f of the optical lens satisfy: 4.60≤f4 / f≤13.

73.

2. The optical lens of claim 1, wherein, A reflective element is arranged between the third lens and the fourth lens, the surface of the reflective element facing the object side is an incident surface, and the surface of the reflective element facing the imaging plane is an exit surface.

3. The optical lens of claim 1, wherein, The effective focal length f of the optical lens and the total optical length TTL satisfy: 15.75≤TTL / f<25.

0.

4. The optical lens of claim 1, wherein, The total optical length TTL of the optical lens and the real image height IH corresponding to the maximum field of view satisfy: 5.98≤TTL / IH<9.

5.

5. The optical lens of claim 1, wherein, The effective focal length f of the optical lens, the radian θ of the maximum half field of view, and the real image height IH corresponding to the maximum field of view satisfy: 0.55<(IH / 2) / (f×θ)<1.

0.

6. The optical lens of claim 1, wherein, The effective focal length f of the optical lens, the maximum field of view FOV, and the real image height IH corresponding to the maximum field of view satisfy: 58.0°<(f×FOV) / IH≤95.72°.

7. The optical lens of claim 1, wherein, The focal length f1 of the first lens and the effective focal length f of the optical lens satisfy: -10.07≤f1 / f≤-5.79; The focal length f2 of the second lens and the effective focal length f of the optical lens satisfy: -9.52≤f2 / f≤-2.

80.

8. The optical lens of claim 1, wherein, The focal length f5 of the fifth lens and the effective focal length f of the optical lens satisfy: 3.3<f5 / f≤6.

57.

9. The optical lens of claim 1, wherein, The focal length f6 of the sixth lens and the effective focal length f of the optical lens satisfy: -6.5<f6 / f<-1.

2.

10. The optical lens of claim 1, wherein, The object side surface curvature radius R9 of the fifth lens and the image side surface curvature radius R10 satisfy: -0.95<(R9-R10) / (R9+R10)<-0.

4.

11. The optical lens of claim 1, wherein, The object side surface curvature radius R11 of the sixth lens and the image side surface curvature radius R12 satisfy: -0.90≤(R11-R12) / (R11+R12)≤0.

97.

12. The optical lens of claim 1, wherein, The interval distance CT34 of the third lens and the fourth lens on the optical axis and the effective focal length f of the optical lens satisfy: 3.5<CT34 / f<9.

5.

13. The optical lens of claim 1, wherein, The sum of the center thicknesses of each of the first lens to the eighth lens ∑CT satisfies: 0.30<∑CT / TTL<0.

55. The sum of the center thicknesses of each of the first lens to the eighth lens ∑CT satisfies: 0.30<∑CT / TTL<0.55.

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