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, wherein an object side surface of the second lens is a concave surface; a third lens with positive optical power; a fourth lens with positive optical power; a fifth lens with positive optical power; a sixth lens with negative optical power, wherein an object side surface of the sixth lens is a concave surface, and an image side surface of the sixth lens is a convex surface; a seventh lens with positive optical power, wherein an object side surface of the seventh lens is a concave surface, and an image side surface of the seventh lens is a convex surface; 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 development 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, for example, the size of the lens 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 demand of the market 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 seven 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, the object side surface of which is concave; a third lens with positive focal power; a fourth lens with positive focal power; a fifth lens with positive focal power; a sixth lens with negative focal power, the object side surface of which is concave, and the image side surface of which is convex; a seventh lens with positive focal power, the object side surface of which is concave, and the image side surface of which is convex; 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) < 0.90.

[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 > 0.75.

[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: 65.0 < (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: 0.55 < 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 < -4.5.

[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 < -2.2.

[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: 5.0 < 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: 3.5 < 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: 2.9 < 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: f6 / f < -3.0.

[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: 3.2 < f7 / f.

[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 < -3.3.

[0022] It is further preferred that the effective focal length f of the optical lens and the radius of curvature R3 of the object side surface of the second lens satisfy: R3 / f < -2.0.

[0023] It is further preferred that the effective focal length f of the optical lens and the radius of curvature R13 on the object side of the seventh lens satisfy: R13 / f <-14.0.

[0024] It is further preferred that the radius of curvature R11 on the object side of the sixth lens and the radius of curvature R12 on the image side satisfy: -0.45<(R11-R12) / (R11+R12)<-1.0.

[0025] It is further preferred that the radius of curvature R13 on the object side of the seventh lens and the radius of curvature R14 on the image side satisfy: 0.7<(R13-R14) / (R13+R14)<1.0.

[0026] It is further preferred that the interval distance CT34 on the optical axis between the third lens and the fourth lens and the effective focal length f of the optical lens satisfy: 3.5<CT34 / f<9.5.

[0027] 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<0.50.

[0028] 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. BRIEF DESCRIPTION OF DRAWINGS

[0029] 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:

[0030] Figure 1 The structure schematic diagram of the optical lens in the example of the present application is shown.

[0031] Figure 2 The structure schematic diagram of the optical lens in the example 1 of the present application is shown.

[0032] Figure 3 The MTF curve diagram of the optical lens in the example 1 of the present application is shown.

[0033] Figure 4 The structure schematic diagram of the optical lens in the example 2 of the present application is shown.

[0034] Figure 5 The MTF curve diagram of the optical lens in the example 2 of the present application is shown.

[0035] Figure 6 The structure schematic diagram of the optical lens in the example 3 of the present application is shown.

[0036] Figure 7 MTF curve diagram of the optical lens in embodiment 3 of the present application.

[0037] Figure 8 Structural schematic diagram of the optical lens in embodiment 4 of the present application.

[0038] Figure 9 MTF curve diagram of the optical lens in embodiment 4 of the present application.

[0039] Figure 10 Structural schematic diagram of the optical lens in embodiment 5 of the present application.

[0040] Figure 11 MTF curve diagram of the optical lens in embodiment 5 of the present application.

[0041] Figure 12 Structural schematic diagram of the optical lens in embodiment 6 of the present application.

[0042] Figure 13 MTF curve diagram of the optical lens in embodiment 6 of the present application.

[0043] Figure 14 Structural schematic diagram of the optical lens in embodiment 7 of the present application.

[0044] Figure 15 MTF curve diagram of the optical lens in embodiment 7 of the present application.

[0045] Figure 16 Structural schematic diagram of the optical lens in embodiment 8 of the present application.

[0046] Figure 17 MTF curve diagram of the optical lens in embodiment 8 of the present application.

[0047] Figure 18 Structural schematic diagram of the optical lens in embodiment 9 of the present application.

[0048] Figure 19 MTF curve diagram of the optical lens in embodiment 9 of the present application.

[0049] Figure 20 Structural schematic diagram of the optical lens in embodiment 10 of the present application.

[0050] Figure 21 MTF curve diagram of the optical lens in embodiment 10 of the present application.

[0051] Figure 22 Structural schematic diagram of the optical lens in embodiment 11 of the present application.

[0052] Figure 23 MTF curve diagram of the optical lens in embodiment 11 of the present application.

[0053] Figure 24 Structure diagram of the optical lens in Embodiment 12 of the present application.

[0054] Figure 25 MTF curve diagram of the optical lens in Embodiment 12 of the present application.

[0055] The following detailed description will further describe the present application with reference to the above-mentioned drawings. DETAILED DESCRIPTION

[0056] 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 detailed descriptions are only descriptions of embodiments of the present application and are not intended in any way to limit the scope of the present application. Throughout the specification, like reference numerals refer to like elements. The expression “and / or” includes any and all combinations of one or more of the associated listed items.

[0057] It should be noted that, in the present specification, the expressions first, second, third and the like are used only to distinguish one feature from another feature, and do not indicate any limitation on the features. Therefore, the first lens discussed below can also be referred to as a second lens or a third lens without departing from the teachings of the present application.

[0058] In the drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for ease 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 strictly to scale.

[0059] 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.

[0060] It should also be understood that the words "comprise," "comprising," "include," "including," and / or "has," when used in this specification, specify the presence of stated features, elements, and / or components, but do not preclude the presence or addition of one or more other features, elements, components, and / or groups thereof. Furthermore, when describing the embodiments of the present application, the word "may" is used to mean "one or more embodiments of the present application." Also, the word "exemplary" is used herein to mean "an example or illustration." At least one of the above-described aspects or embodiments of the present application can be implemented in hardware, firmware or software, or any combination thereof.

[0061] 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.

[0062] It should be noted that the embodiments and features of the present application can be combined with each other, if not in conflict. The present application will be described in detail with reference to the accompanying drawings and embodiments.

[0063] Examples

[0064] Reference Figure 1 The structure of the optical lens in the present application is shown in the following figure. 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 mirror of the folded optical path, the optical lens coordinate system after the prism is changed, and the lens curvature radius R and the thickness D after the prism are opposite numbers. 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, which is beneficial to the assembly in a small space. It should be noted that the purpose of adding the fold-back structure is to improve the compactness of the optical lens, and 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.

[0065] The optical lens provided by the embodiment of the present application comprises 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.

[0066] 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, thereby realizing large-angle light collection.

[0067] In some embodiments, the second lens can have a negative focal power, which is conducive to smooth transition of the 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 object side of the second lens is concave, which is conducive to cooperating with the concave image side of the first lens to enable the light to be smoothly received by the second lens, reduce the front-end aperture of the optical lens, and facilitate the miniaturization of the optical lens.

[0068] In some embodiments, the third lens can have a positive focal power, which is conducive to improving the light convergence ability of the optical lens, 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 and a concave image side, or both the object side and the image side are convex, or the object side is concave and the image side is convex.

[0069] In some embodiments, the fourth lens can have a positive focal power, which is conducive to improving the light convergence ability of the optical lens, 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 and a concave image side, or both the object side and the image side are convex, or the object side is concave and the image side is convex.

[0070] In some embodiments, the fifth lens can have a positive focal power, which is conducive to improving the light convergence ability of the optical lens, balancing various aberrations of the optical lens, and improving the imaging quality of the optical lens. The fifth lens can have a convex object side and a concave image side, or both the object side and the image side are convex, or the object side is concave and the image side is convex.

[0071] In some embodiments, the sixth lens can have a negative focal power, which is conducive to diverging the light converging through the fourth lens and the fifth lens, so that the light can reach a higher imaging position. The object side of the sixth lens is concave, and the image side is convex, which can reduce the ghost energy of the light reflected by the object side of the sixth lens, thereby reducing the ghost energy on the imaging screen; at the same time, the sixth lens can also suppress the exit angle of the edge field of view light, which is conducive to reducing the rear-end aperture of the optical lens.

[0072] In some embodiments, the seventh lens can have positive refractive power, which is conducive to further converging light rays, and in combination with the sixth lens having negative refractive power, can correct chromatic aberration. The object side of the seventh lens is concave, and the image side is convex, which is conducive to gently converging light rays, shortening the distance to the next lens, and reducing the total length of the optical lens.

[0073] In some embodiments, the eighth lens can have negative refractive power, which is conducive to diverging incident light rays, making the peripheral light rays and central light rays turn upward to reach a higher imaging position. The eighth 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.

[0074] In some embodiments, the optical lens can further include a stop, which can be located between the fifth lens and the sixth lens. It can be understood that the stop is used to limit the amount of light to change the brightness of the imaging. In addition, when the stop is located between the fifth lens and the sixth lens, the stop 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 aberrations, which is conducive to balancing the structure of the entire optical system. In addition, when the stop is located between the fifth lens and the sixth lens, the stop aberration can be corrected.

[0075] In some embodiments, the optical lens can further include a filter, which is arranged between the eighth lens and the imaging surface. The filter is used to filter out interference light to prevent interference light from reaching the imaging surface of the optical lens and affecting normal imaging.

[0076] In some embodiments, in order to reduce the size of the optical lens, a reflection element with no refractive 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 facing the object side is the incident surface, and the surface facing the imaging surface is the exit surface. Both the incident surface and the exit surface are flat. The prism can be a right-angle prism, and 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 bending the light path through the prism, the thickness of the lens can be effectively shortened.

[0077] 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 conducive to realizing the miniaturization of the optical lens.

[0078] In some embodiments, the total track 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 can effectively limit the total track length and the image height of the optical lens, which is beneficial to realize a short total track length and a large image height.

[0079] 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)<0.90. Satisfying the above range means that the structure has higher design flexibility, which can effectively control the distortion range and meet the requirements of different distortion algorithms.

[0080] In some embodiments, the effective focal length f of the optical lens and the optical back focal length BFL satisfy: BFL / f>0.75. 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 production yield.

[0081] In some embodiments, the effective focal length f of the optical lens, the maximum field of view angle FOV, and the real image height IH corresponding to the maximum field of view angle satisfy: 65.0<(f x FOV) / IH. Satisfying the above range is beneficial to meet the requirements of a large field of view of the optical lens, realize a large image height and a long focal length, and more beneficial to realize small distortion and improve the imaging quality of the optical lens.

[0082] In some embodiments, the real image height IHm corresponding to the central field of view angle of the optical lens and the real image height IH corresponding to the maximum field of view angle satisfy: 0.55<IHm / IH. Satisfying the above range can effectively improve the proportion of the central field of view imaging range in the entire imaging range, and compared with lenses with the same field of view angle, the proportion of the central field of view imaging range in the entire imaging range is larger, which can obtain more detailed information.

[0083] In some embodiments, the focal length f1 of the first lens and the effective focal length f of the optical lens satisfy: f1 / f<-4.5. Satisfying the above range can make the first lens have an appropriate negative focal length, avoid excessive concentration of the negative focal length, and at the same time, be beneficial to increase the field of view angle and collect as much edge field of view light as possible into the rear optical lens to realize large-angle light collection.

[0084] In some embodiments, the focal length f2 of the second lens and the effective focal length f of the optical lens satisfy: f2 / f<-2.2. Satisfying the above range can make the second lens have an appropriate negative focal length, increase the field of view angle, and improve the imaging quality of the optical lens.

[0085] In some embodiments, the focal length f3 of the third lens and the effective focal length f of the optical lens satisfy: 5.0 < f3 / f. Satisfying the above range can make the third lens have appropriate positive refractive power, help to improve the light converging ability of the optical lens, and balance various aberrations generated by the optical lens, thereby improving the imaging quality of the optical lens.

[0086] In some embodiments, the focal length f4 of the fourth lens and the effective focal length f of the optical lens satisfy: 3.5 < f4 / f. Satisfying the above range can make the fourth lens have appropriate positive refractive power, help to improve the light converging ability of the optical lens, and balance the aberration of the optical lens, thereby improving the imaging quality of the optical lens.

[0087] In some embodiments, the focal length f5 of the fifth lens and the effective focal length f of the optical lens satisfy: 2.9 < f5 / f. Satisfying the above range can make the fifth lens have appropriate positive refractive power, help to improve the light converging ability of the optical lens, and balance the aberration of the optical lens, thereby improving the imaging quality of the optical lens.

[0088] In some embodiments, the focal length f6 of the sixth lens and the effective focal length f of the optical lens satisfy: f6 / f <-3.0. Satisfying the above range can make the sixth lens have appropriate negative refractive power, help to diverge the light converging through the fourth lens and the fifth lens, and increase the image height of the optical lens.

[0089] In some embodiments, the focal length f7 of the seventh lens and the effective focal length f of the optical lens satisfy: 3.2 < f7 / f. Satisfying the above range can make the seventh lens have appropriate positive refractive power, help to suppress the angle of light exiting at the edge field of view.

[0090] In some embodiments, the focal length f8 of the eighth lens and the effective focal length f of the optical lens satisfy: f8 / f <-3.3. Satisfying the above range can make the eighth lens have appropriate negative refractive power, help to diverge the light, and make the peripheral light and the central light turn up to a higher imaging position.

[0091] In some embodiments, the effective focal length f of the optical lens and the radius of curvature R3 of the object side surface of the second lens satisfy: R3 / f <-2.0. Satisfying the above range can make the light be smoothly accepted by the second lens, reduce the aperture of the front end of the optical lens, and help to miniaturize the optical lens.

[0092] In some embodiments, the effective focal length f of the optical lens and the radius of curvature R13 of the object side surface of the seventh lens satisfy: R13 / f<-14.0. Satisfying the above range can make the seventh lens have a larger focal length, reduce the influence of temperature change on the back focal length of the lens, realize thermal stability of the optical lens, and facilitate smooth transition of light rays, avoid excessive convergence of light rays, and improve the imaging quality of the optical lens.

[0093] 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: -0.45<(R11-R12) / (R11+R12)<-1.0. Satisfying the above range can suppress the exit angle of the edge field of view light, and facilitate reduction of the back end aperture of the optical lens.

[0094] In some embodiments, the radius of curvature R13 of the object side surface of the seventh lens and the radius of curvature R14 of the image side surface satisfy: 0.7<(R13-R14) / (R13+R14)<1.0. Satisfying the above range facilitates gentle convergence of light rays, can shorten the distance to the next lens, and facilitates reduction of the total length of the optical lens.

[0095] In some embodiments, the separation 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 can realize the folding structure of the optical lens and reduce the thickness of the lens.

[0096] In some embodiments, the sum of the central thicknesses of the first lens to the eighth lens ∑CT and the total optical length TTL of the optical lens satisfy: 0.30<∑CT / TTL<0.50. Satisfying the above range facilitates compression of the total length and volume of the optical lens and maintains the miniaturization of the optical lens.

[0097] In some embodiments, the optical lens satisfies the condition: FOV>180°, 1.4mm<f<2.4mm, 3.5mm<IH<6.0mm, where FOV represents the maximum field of view 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 of the optical lens. Satisfying the above conditions indicates that the optical lens provided by the embodiments has at least one of the characteristics of super wide angle and large image surface.

[0098] In some embodiments, the sixth lens and the seventh lens can be glued to form a glued 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. In addition, the glued lens can 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.

[0099] 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 achieving lens miniaturization. More specifically, the second lens, the third lens and the eighth lens in the optical lens provided by the 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.

[0100] Embodiment 1

[0101] Referring to FIG. 1, Figure 2 FIG. 1 shows a structural schematic diagram of an optical lens provided in Embodiment 1 of the application. The optical lens includes, along an optical axis from an object side to an 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.

[0102] The first lens L1 has a 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 a negative focal power, the object side S3 and the image side S4 are both concave surfaces; the third lens L3 has a positive focal power, the object side S5 and the image side S6 are both convex surfaces; the prism has a plane as an incident surface facing the object side and a plane as an exit surface facing the imaging surface; the fourth lens L4 has a positive focal power, the object side S7 and the image side S8 are both convex surfaces; the fifth lens L5 has a positive focal power, the object side S9 and the image side S10 are both convex surfaces; the sixth lens L6 has a negative focal power, the object side S11 is a concave surface, and the image side S12 is a convex surface; the seventh lens L7 has a positive focal power, the object side S12 is a concave surface, and the image side S13 is a convex surface, and the sixth lens L6 and the seventh lens L7 form a cemented lens, and the cemented surface is S12; the eighth lens L8 has a 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.

[0103] 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.

[0104] The related parameters of the lenses in the optical lens in Embodiment 1 are shown in Table 1-1.

[0105] Table 1-1

[0106]

[0107] The surface shape parameters of the aspherical lens of the optical lens in Embodiment 1 are shown in Table 1-2.

[0108] Table 1-2

[0109] Surface number K B C D E F S3 -4.43E+00 0.00E+00 5.72E-04 -1.32E-05 1.20E-07 5.57E-10 S4 4.03E+01 0.00E+00 1.29E-03 4.80E-06 -4.05E-07 1.92E-09 S5 -7.39E+01 0.00E+00 -6.53E-04 3.95E-05 -1.71E-06 3.15E-08 S6 -1.47E-01 0.00E+00 -3.80E-05 -1.20E-06 -3.18E-07 8.73E-09 S14 3.98E+00 0.00E+00 -4.96E-03 -4.02E-04 -2.72E-05 -4.51E-06 S15 2.08E+00 0.00E+00 -2.66E-03 -9.07E-04 6.91E-05 -1.48E-05

[0110] In the present embodiment, Figure 3 The MTF (Modulation Transfer Function) curve of Embodiment 1 is shown, which represents the imaging modulation degree of the lens at 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 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 both low and high frequency cases.

[0111] Embodiment 2

[0112] Please refer to Figure 4 , which is a structural schematic diagram of the optical lens provided in Embodiment 2 of the present application. Compared with Embodiment 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.

[0113] The related parameters of each lens in the optical lens in Embodiment 2 are shown in Table 2-1.

[0114] Table 2-1

[0115]

[0116] The surface shape parameters of the aspherical lens of the optical lens in Embodiment 2 are shown in Table 2-2.

[0117] Table 2-2

[0118] Surface number 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

[0119] It can be seen from Figure 5 that 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 both low and high frequency cases.

[0120] Embodiment 3

[0121] Please refer to Figure 6 , which is a structural schematic diagram of the optical lens provided in Embodiment 3 of the present application. Compared with Embodiment 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.

[0122] The related parameters of the lenses in the optical lens in embodiment 3 are shown in table 3-1.

[0123] Table 3-1

[0124]

[0125] The surface type parameters of the aspheric lenses of the optical lens in embodiment 3 are shown in table 3-2.

[0126] Table 3-2

[0127] Surface number K B C D E F S3 -6.40E+01 0.00E+00 -9.83E-04 1.22E-05 1.19E-07 -2.37E-09 S4 -4.71E-01 0.00E+00 -5.94E-04 -6.59E-05 2.92E-06 -7.75E-08 S5 -1.24E+01 0.00E+00 8.65E-04 -3.73E-05 1.85E-06 -5.83E-08 S6 4.69E+01 0.00E+00 3.52E-04 1.22E-05 1.47E-06 -1.41E-08 S14 -1.18E+01 0.00E+00 -1.00E-02 -8.80E-04 3.72E-05 -2.67E-05 S15 1.79E+00 0.00E+00 -1.27E-02 -8.67E-04 1.47E-04 -2.18E-05

[0128] It can be seen from Figure 7 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.

[0129] Embodiment 4

[0130] Please refer to Figure 8 , which is a structural schematic diagram of the optical lens provided in embodiment 4 of the application, and the 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.

[0131] The related parameters of the lenses in the optical lens in embodiment 4 are shown in table 4-1.

[0132] Table 4-1

[0133]

[0134] The surface type parameters of the aspheric lenses of the optical lens in embodiment 4 are shown in table 4-2.

[0135] Table 4-2

[0136] Surface number K B C D E F S3 -1.10E+02 0.00E+00 -1.05E-03 2.94E-06 6.58E-07 -1.10E-08 S4 5.04E+00 0.00E+00 -6.21E-04 -3.43E-05 1.67E-06 -2.45E-08 S5 -2.31E+01 0.00E+00 2.04E-03 -2.77E-05 1.30E-06 -5.42E-08 S6 9.97E+01 0.00E+00 1.66E-03 1.02E-05 1.40E-06 -1.19E-07 S14 4.15E+00 0.00E+00 -4.45E-03 -5.31E-04 4.98E-05 -1.31E-05 S15 1.95E+00 0.00E+00 -3.00E-03 -1.10E-03 1.33E-04 -2.13E-05

[0137] It can be seen from Figure 9 that the MTF values of the embodiment are all above 0.35 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 better imaging quality and better detail resolution ability in the low frequency and high frequency cases.

[0138] Embodiment 5

[0139] Please refer to Figure 10The figure shown is a schematic diagram of the structure of the optical lens provided in Embodiment 5 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.

[0140] The relevant parameters of each lens in the optical lens of Example 5 are shown in Table 5-1.

[0141] Table 5-1

[0142]

[0143] The surface profile parameters of the aspherical lens in Example 5 are shown in Table 5-2.

[0144] Table 5-2

[0145] Surface number K B C D E F S3 -9.30E+00 0.00E+00 1.14E-04 -8.10E-06 1.66E-07 -3.61E-10 S4 3.82E+00 0.00E+00 8.65E-04 -7.30E-05 2.43E-06 -1.71E-07 S5 -3.00E+02 0.00E+00 -8.34E-04 2.13E-05 -1.46E-06 -1.02E-08 S6 -2.39E+02 0.00E+00 -5.31E-04 8.16E-05 -4.67E-06 2.23E-07 S14 1.14E+02 0.00E+00 -1.38E-02 -3.04E-04 -1.27E-04 -7.42E-06 S15 2.17E-01 0.00E+00 -1.17E-02 4.70E-04 -3.76E-05 2.83E-06

[0146] from Figure 11 As can be seen, the MTF value of this embodiment is above 0.45 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, and it has good imaging quality and good detail resolution in both low and high frequency conditions.

[0147] Example 6

[0148] Please see Figure 12 The figure shown is a schematic diagram of the structure of the optical lens provided in Embodiment 6 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.

[0149] The relevant parameters of each lens in the optical lens of Example 6 are shown in Table 6-1.

[0150] Table 6-1

[0151]

[0152] The surface profile parameters of the aspherical lens in Example 6 are shown in Table 6-2.

[0153] Table 6-2

[0154] Surface number K B C D E F S3 -2.68E+01 0.00E+00 -2.12E-03 1.02E-04 -2.11E-06 1.75E-08 S4 3.90E-01 0.00E+00 -2.96E-03 -1.62E-04 8.98E-06 -3.22E-07 S5 3.00E+02 0.00E+00 -1.61E-03 -6.66E-05 -1.43E-06 1.63E-07 S6 -6.28E+01 0.00E+00 -1.20E-03 5.24E-05 -1.65E-06 6.13E-08 S14 -8.56E+01 0.00E+00 -1.56E-02 1.23E-03 -3.52E-04 3.08E-05 S15 2.48E+01 0.00E+00 -6.12E-03 -2.14E-04 2.57E-05 -1.06E-06

[0155] from Figure 13 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.

[0156] Embodiment 7

[0157] Please refer to Figure 14 , which is a structural schematic diagram of the optical lens provided in Embodiment 7 of the present application. Compared with Embodiment 1, the main difference of the present embodiment lies in that the optical parameters such as the radius of curvature of each lens surface and the lens thickness are different.

[0158] The related parameters of each lens in the optical lens in Embodiment 7 are shown in Table 7-1.

[0159] Table 7-1

[0160]

[0161] The surface type parameters of the aspherical lens of the optical lens in Embodiment 7 are shown in Table 7-2.

[0162] Table 7-2

[0163] Surface number K B C D E F S3 -1.48E+00 0.00E+00 1.27E-03 -1.87E-05 -6.48E-07 2.80E-08 S4 9.96E+00 0.00E+00 -1.30E-04 3.93E-05 -1.52E-06 -3.26E-08 S5 2.23E+01 0.00E+00 -1.18E-03 2.33E-05 -8.50E-07 1.17E-08 S6 9.13E-02 0.00E+00 7.72E-05 -9.11E-06 -1.16E-07 1.40E-08 S14 -1.55E+00 0.00E+00 -4.52E-03 -4.67E-04 -9.80E-05 4.10E-06 S15 6.01E+00 0.00E+00 -6.71E-03 -1.95E-03 1.94E-04 -4.97E-05

[0164] It can be seen from Figure 15 that the MTF value of the present 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 ability in the case of low frequency and high frequency.

[0165] Embodiment 8

[0166] Please refer to Figure 16 , which is a structural schematic diagram of the optical lens provided in Embodiment 8 of the present application. Compared with Embodiment 1, the main difference of the present embodiment lies in that the optical parameters such as the radius of curvature of each lens surface and the lens thickness are different.

[0167] The related parameters of each lens in the optical lens in Embodiment 8 are shown in Table 8-1.

[0168] Table 8-1

[0169]

[0170] The surface type parameters of the aspherical lens of the optical lens in Embodiment 8 are shown in Table 8-2.

[0171] Table 8-2

[0172] Surface number K B C D E F S3 -4.55E+00 0.00E+00 8.61E-04 -2.43E-06 -8.22E-07 2.34E-08 S4 1.08E+02 0.00E+00 2.81E-03 -4.50E-05 1.09E-07 -5.36E-08 S5 1.74E+00 0.00E+00 -1.34E-03 4.68E-05 -7.50E-06 1.71E-07 S6 5.00E-01 0.00E+00 1.34E-04 4.17E-06 -4.96E-07 3.38E-08 S14 -3.06E+00 0.00E+00 -2.84E-03 -7.03E-04 -1.99E-04 5.54E-06 S15 2.42E+00 0.00E+00 -6.74E-03 -2.42E-03 -1.06E-04 -4.78E-05

[0173] It can be seen from Figure 17As 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.

[0174] Example 9

[0175] Please see Figure 18 The figure shown is a schematic diagram of the structure of the optical lens provided in Embodiment 9 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.

[0176] The relevant parameters of each lens in the optical lens of Example 9 are shown in Table 9-1.

[0177] Table 9-1

[0178]

[0179] The surface profile parameters of the aspherical lens in the optical lens of Example 9 are shown in Table 9-2.

[0180] Table 9-2

[0181] Surface number 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

[0182] from Figure 19 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.

[0183] Example 10

[0184] Please see Figure 20 The figure shown is a schematic diagram of the structure of the optical lens provided in Embodiment 10 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.

[0185] The relevant parameters of each lens in the optical lens of Example 10 are shown in Table 10-1.

[0186] Table 10-1

[0187]

[0188] The surface profile parameters of the aspherical lens in the optical lens of Example 10 are shown in Table 10-2.

[0189] Table 10-2

[0190] Surface number K B C D E F S3 -1.84E+00 0.00E+00 5.80E-04 -9.12E-06 -4.79E-08 2.55E-09 S4 2.31E+01 0.00E+00 7.76E-04 -1.05E-05 -1.93E-07 -2.16E-08 S5 -1.61E+01 0.00E+00 4.90E-04 1.17E-05 -3.10E-07 6.18E-09 S6 -6.62E+00 0.00E+00 4.80E-04 2.46E-05 -8.18E-07 6.15E-08 S14 -6.53E+00 0.00E+00 -2.11E-03 -1.09E-04 5.23E-06 -1.65E-06 S15 1.47E+00 0.00E+00 -3.00E-03 -5.89E-05 4.20E-05 -2.32E-06

[0191] from Figure 21 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.

[0192] Example 11

[0193] Please see Figure 22 The figure shown is a schematic diagram of the optical lens provided in Embodiment 11 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.

[0194] The relevant parameters of each lens in the optical lens of Example 11 are shown in Table 11-1.

[0195] Table 11-1

[0196]

[0197] The surface profile parameters of the aspherical lens in the optical lens of Example 11 are shown in Table 11-2.

[0198] Table 11-2

[0199] Surface number K B C D E F S3 -9.68E-02 0.00E+00 6.87E-04 5.10E-06 -1.51E-07 2.05E-09 S4 1.08E-01 0.00E+00 -2.48E-04 2.81E-05 3.67E-06 -2.11E-07 S5 2.63E+00 0.00E+00 -4.64E-04 3.60E-06 1.31E-06 -1.42E-07 S6 1.37E+02 0.00E+00 -1.23E-04 4.79E-06 -9.76E-07 6.75E-09 S14 6.33E+00 0.00E+00 -1.13E-02 -3.38E-04 -6.01E-05 9.70E-06 S15 2.03E+02 0.00E+00 -8.32E-03 1.59E-04 2.39E-05 -5.34E-07

[0200] from Figure 23 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 good imaging quality and good detail resolution in both low and high frequency conditions.

[0201] Example 12

[0202] Please see Figure 24 The figure shown is a schematic diagram of the optical lens provided in Embodiment 12 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.

[0203] The relevant parameters of each lens in the optical lens of Example 12 are shown in Table 12-1.

[0204] Table 12-1

[0205]

[0206] The surface shape parameters of the aspherical lens of the optical lens in Embodiment 12 are shown in Table 12-2.

[0207] Table 12-2

[0208] Surface number K B C D E F S3 -4.13E+00 0.00E+00 3.59E-04 -2.10E-05 2.98E-07 2.96E-09 S4 2.83E+00 0.00E+00 8.99E-04 -7.85E-05 -6.28E-07 -7.32E-08 S5 9.61E+00 0.00E+00 -5.85E-04 -3.81E-05 -2.57E-06 6.68E-09 S6 2.51E+00 0.00E+00 2.78E-04 -1.69E-05 -1.39E-06 1.04E-07 S14 1.60E+02 0.00E+00 -1.03E-02 1.85E-04 -1.03E-04 1.97E-05 S15 -7.11E+01 0.00E+00 -1.27E-03 -7.90E-04 2.23E-04 -1.72E-05

[0209] As can be seen from Figure 25 , the MTF value of the optical lens in 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 in both low and high frequency cases.

[0210] Please refer to Table 13 for 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.

[0211] Table 13

[0212] Parameter and conditional expression Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 f (mm) 2.04 2.22 1.94 2.18 2.06 2.26 FOV (°) 200.00 200.00 200.00 190.00 200.00 200.00 EPD (mm) 1.02 1.11 0.97 1.09 1.03 1.13 TTL (mm) 35.00 35.00 35.00 35.00 35.00 35.00 Fno 2.00 2.00 2.00 2.00 2.00 2.00 IH (mm) 5.85 5.85 5.83 5.76 5.83 5.72 IHm (mm) 3.42 3.67 3.36 3.49 3.49 3.79 CRA (°) 38.02 36.52 41.22 35.28 37.57 27.93 BFL (mm) 2.13 1.92 1.96 2.22 2.12 1.80 TTL / f 17.19 15.75 18.06 16.06 16.99 15.50 TTL / IH 5.98 5.98 6.00 6.08 6.00 6.12 (IH / 2) / (f x θ) 0.82 0.75 0.86 0.80 0.81 0.73 BFL / f 1.05 0.86 1.01 1.02 1.03 0.80 (f x FOV) / IH 69.61 75.99 66.43 71.90 70.64 78.93 IHm / IH 0.58 0.63 0.58 0.61 0.60 0.66 f1 / f -5.64 -6.60 -6.66 -4.97 -7.05 -6.69 f2 / f -2.69 -3.81 -4.17 -8.59 -3.86 -2.93 f3 / f 5.32 12.89 13.01 12.41 14.98 9.34 f4 / f 8.21 4.60 5.24 3.76 4.66 4.95 f5 / f 3.07 3.51 3.20 5.65 3.73 3.38 f6 / f -4.00 -6.27 -6.47 -3.29 -6.41 -9.08 f7 / f 4.71 4.32 6.24 4.52 4.62 4.50 f8 / f -28.26 -4.64 -5.42 -53.67 -4.04 -3.59 R3 / f -2.80 -2.26 -19.10 -13.35 -3.85 -5.36 R13 / f -109.01 -24.31 -57.52 -15.43 -51.82 -14.46 (R11-R12) / (R11+R12) -0.93 -0.67 -0.82 -0.71 -0.80 -0.50 (R13-R14) / (R13+R14) 0.95 0.82 0.89 0.75 0.90 0.78 CT34 / f 4.09 3.87 4.78 4.17 4.63 3.93 ∑CT / TTL 0.37 0.46 0.43 0.33 0.44 0.48

[0213] Table 13 (continued)

[0214]

[0215]

[0216] 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 the surface shape of each lens and reasonable matching of the optical power, so that the lens has one or more advantages such as ultra-wide angle, high pixel, and high imaging quality.

[0217] 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 conjunction 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.

[0218] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be noted that for ordinary skilled persons 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 in sequence: a first lens with negative refractive power, the object side surface of which is a convex surface, and the image side surface of which is a concave surface; a second lens with negative refractive power, the object side surface of which is a concave surface; a third lens with positive refractive power; a fourth lens with positive refractive power; a fifth lens with positive refractive power; a sixth lens with negative refractive power, the object side surface of which is a concave surface, and the image side surface of which is a convex surface; a seventh lens with positive refractive power, the object side surface of which is a concave surface, and the image side surface of which is a convex surface; an eighth lens with negative refractive power; 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: 65.0°<(f×FOV) / IH≤95.72°. The focal length f7 of the seventh lens and the effective focal length f of the optical lens satisfy: 3.2<f7 / f≤6.

24. The optical total 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.

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 and the optical total length TTL of the optical lens satisfy: 15.50≤TTL / f<25.

0.

4. The optical lens of claim 1, wherein, The optical total 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.

25.

5. The optical lens of claim 1, wherein, The effective focal length f, the maximum half field of view radian θ and the real image height IH corresponding to the maximum field of view of the optical lens satisfy: 0.55<(IH / 2) / (f×θ)<0.

90.

6. The optical lens of claim 1, wherein, 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: 66.43°≤(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: -8.72≤f1 / f<-4.

5.

8. The optical lens of claim 1, wherein, The focal length f2 of the second lens and the effective focal length f of the optical lens satisfy: -8.59≤f2 / f<-2.

2.

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: -9.08≤f6 / f<-3.

0.

10. The optical lens of claim 1, wherein, The focal length f7 of the seventh lens and the effective focal length f of the optical lens satisfy: 3.47≤f7 / f≤6.

24.

11. The optical lens of claim 1, wherein, The focal length f8 of the eighth lens and the effective focal length f of the optical lens satisfy: -76.58≤f8 / f<-3.

3.

12. The optical lens of claim 1, wherein, The effective focal length f of the optical lens and the object side surface curvature radius R3 of the second lens satisfy: -19.10≤R3 / f<-2.

0.

13. The optical lens of claim 1, wherein, The effective focal length f of the optical lens and the object side surface curvature radius R13 of the seventh lens satisfy: -1422.90≤R13 / f<-14.

0.

14. The optical lens of claim 1, wherein, The object side surface curvature radius R11 and the image side surface curvature radius R12 of the sixth lens satisfy: -0.45<(R11-R12) / (R11+R12)<-1.

0.

15. The optical lens of claim 1, wherein, The object side surface radius of curvature R13 and the image side surface radius of curvature R14 of the seventh lens satisfy: 0.7 < (R13-R14) / (R13+R14) < 1.

0.

16. 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.

17. The optical lens of claim 1, wherein, 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 < 0.50.

Images