Optical lens, camera module and terminal device

Abstract

The application discloses an optical lens, a camera module and a terminal device. The optical lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens. The first lens has negative refractive power, the second lens has negative refractive power, the third lens has positive refractive power, the fourth lens has positive refractive power, the fifth lens has positive refractive power, the sixth lens has negative refractive power, the seventh lens has positive refractive power, and the eighth lens has negative refractive power. The optical lens satisfies the following relationship: 9 <= TTL / IMGH <= 9.6, TTL is the distance from the object side of the first lens to the imaging surface of the optical lens on the optical axis, and IMGH is half of the maximum field angle corresponding to the image height of the optical lens.

Description

Technical Field

[0001] This invention relates to the field of optical imaging technology, and in particular to an optical lens, camera module and terminal device. Background Technology

[0002] In recent years, lenses for mobile devices, automotive devices, sports devices, and security monitoring devices have been trending towards lighter, thinner, and smaller designs. As lens modules become miniaturized, the demands for image quality also increase. However, current technologies struggle to simultaneously meet the demands for high-definition imaging while adhering to the trend towards lighter, thinner, and smaller optical lenses. Summary of the Invention

[0003] This invention discloses an optical lens, a camera module, and a terminal device. The optical lens can achieve both miniaturization and good imaging quality.

[0004] To achieve the above objectives, in a first aspect, embodiments of the present invention disclose an optical lens, comprising a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens arranged sequentially along the optical axis from the object side to the image side; the first lens has negative refractive power, the object side of the first lens is convex near the optical axis, and the image side of the first lens is concave near the optical axis; the second lens has negative refractive power, the object side of the second lens is convex near the optical axis, and the image side of the second lens is concave near the optical axis; the third lens has positive refractive power, the object side of the third lens is convex near the optical axis, and the image side of the third lens is concave near the optical axis; the fourth lens has positive refractive power, the object side of the fourth lens is convex near the optical axis; and the fifth lens has positive refractive power. The object-side surface of the fifth lens is convex near the optical axis, and the image-side surface of the fifth lens is also convex near the optical axis. The sixth lens has negative refractive power, and both its object-side and image-side surfaces are concave near the optical axis. The seventh lens has positive refractive power, and both its object-side and image-side surfaces are convex near the optical axis. The eighth lens has negative refractive power, and both its object-side and image-side surfaces are concave near the optical axis. There are eight lenses with refractive power. The optical lens satisfies the following relationship: 9 ≤ TTL / IMGH ≤ 9.6; where TTL is the distance on the optical axis from the object-side surface of the first lens to the imaging plane of the optical lens, and IMGH is half the image height corresponding to the maximum field of view of the optical lens.

[0005] By setting the first lens to have negative refractive power, with the object-side surface being convex near the optical axis and the image-side surface being concave near the optical axis, it is beneficial to allow large-angle incident light rays to enter the optical lens, expanding the field of view of the optical lens and thus obtaining a large field of view characteristic. By setting the second lens to have negative refractive power, with the object-side surface being convex near the optical axis and the image-side surface being concave near the optical axis, it allows the incident light rays passing through the first lens to enter the optical lens more smoothly, which is beneficial to correcting the field curvature and astigmatism of the optical lens, enhancing the imaging stability of the optical lens, and thus improving the imaging quality of the optical lens. The third lens has positive refractive power, with the object-side surface being convex near the optical axis and the image-side surface being concave near the optical axis, further providing a reasonable incident angle for the introduction of peripheral light rays, so that the optical lens has a reasonable field of view. The fourth and fifth lenses are both positive lenses, which compress the light collected by the first, second, and third lenses, resulting in a smoother transition of incident light. This improves the relative illumination of the optical lens and effectively converges light rays from both the center and edge fields of view, thereby correcting edge aberrations, improving the resolving power of the optical lens, and further enhancing its image quality. The fifth lens's convex design near the optical axis on both its object and image sides gives it strong positive refractive power, which helps to shorten the overall optical length of the optical lens. By setting the sixth lens as a negative lens with concave object and image sides near the optical axis, stray light is avoided, and edge relative illumination is improved. The seventh lens has positive refractive power, and its convex object side near the optical axis and concave image side near the optical axis helps to correct edge aberrations and improve the resolving power of the optical lens. Setting the eighth lens as a negative lens is beneficial for correcting distortion, astigmatism, and field curvature, thereby improving image quality. The image side of the eighth lens is concave near the optical axis, which allows the optical lens to have a reasonable back focus, ensuring sufficient installation space for the filter. This reduces the sensitivity of the optical lens while achieving a shorter overall optical length, making the optical lens smaller.

[0006] Furthermore, the optical lens must satisfy the relationship: 9 ≤ TTL / IMGH ≤ 9.6. This allows for a reasonable configuration of the total optical length and image height of the optical lens, which is beneficial for achieving wide-angle characteristics, shortening the total optical length for miniaturization, and improving relative illumination, thus enhancing image quality. Exceeding the upper limit of this relationship results in an excessively large total optical length, hindering miniaturization. Conversely, falling below the lower limit leads to an excessively large image height and a large principal ray incident angle at the edges, resulting in low relative illumination and making the lens prone to vignetting.

[0007] Secondly, the present invention discloses a camera module, which includes a photosensitive chip and an optical lens as described in the first aspect above, wherein the photosensitive chip is disposed on the image side of the optical lens. The camera module having the optical lens of the first aspect possesses all the technical effects of the optical lens described in the first aspect; that is, the optical lens of this camera module can achieve both miniaturization and superior image quality.

[0008] Thirdly, the present invention discloses a terminal device, which includes a fixing member and the camera module described in the second aspect above, wherein the camera module is disposed on the fixing member. The terminal device having the camera module described in the second aspect also possesses all the technical effects of the optical lens described in the first aspect. That is, the optical lens of this terminal device can achieve both miniaturization and superior imaging quality. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0010] Figure 1 This is a schematic diagram of the structure of the optical lens disclosed in the first embodiment of the present invention;

[0011] Figure 2 These are the longitudinal spherical aberration diagram, astigmatism diagram, and distortion diagram of the optical lens disclosed in the first embodiment of the present invention;

[0012] Figure 3 This is a schematic diagram of the structure of the optical lens disclosed in the second embodiment of the present invention;

[0013] Figure 4 These are the longitudinal spherical aberration diagram, astigmatism diagram, and distortion diagram of the optical lens disclosed in the second embodiment of the present invention;

[0014] Figure 5 This is a schematic diagram of the structure of the optical lens disclosed in the third embodiment of the present invention;

[0015] Figure 6 These are the longitudinal spherical aberration diagram, astigmatism diagram, and distortion diagram of the optical lens disclosed in the third embodiment of the present invention;

[0016] Figure 7 This is a schematic diagram of the structure of the optical lens disclosed in the fourth embodiment of the present invention;

[0017] Figure 8 These are the longitudinal spherical aberration diagram, astigmatism diagram, and distortion diagram of the optical lens disclosed in the fourth embodiment of the present invention;

[0018] Figure 9 This is a schematic diagram of the structure of the optical lens disclosed in the fifth embodiment of the present invention;

[0019] Figure 10 These are the longitudinal spherical aberration diagram, astigmatism diagram, and distortion diagram of the optical lens disclosed in the fifth embodiment of the present invention;

[0020] Figure 11 This is a schematic diagram of the camera module disclosed in this invention;

[0021] Figure 12 This is a schematic diagram of the structure of the device terminal disclosed in this invention. Detailed Implementation

[0022] In this invention, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (the specific types and structures may be the same or different), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0023] The technical solution of the present invention will be further described below with reference to the embodiments and accompanying drawings.

[0024] In a first aspect, the present invention discloses an optical lens comprising a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens arranged sequentially along the optical axis from the object side to the image side. During imaging, light rays enter the first lens, second lens, third lens, fourth lens, fifth lens, sixth lens, seventh lens, and eighth lens sequentially from the object side of the first lens, and are ultimately imaged onto the imaging plane of the optical lens.

[0025] Furthermore, the first lens has negative refractive power, its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis; the second lens has negative refractive power, its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis; the third lens has positive refractive power, its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis; the fourth lens has positive refractive power, its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. The fifth lens has positive refractive power, and both its object-side surface and image-side surface are convex near the optical axis. The sixth lens has negative refractive power, and both its object-side surface and image-side surface are concave near the optical axis. The seventh lens has positive refractive power, and both its object-side surface and image-side surface are convex near the optical axis. The eighth lens has negative refractive power, and both its object-side surface and image-side surface are concave near the optical axis.

[0026] By setting the first lens to have negative refractive power, with the object-side surface being convex near the optical axis and the image-side surface being concave near the optical axis, it is beneficial to allow large-angle incident light rays to enter the optical lens, expanding the field of view of the optical lens and thus obtaining a large field of view characteristic. By setting the second lens to have negative refractive power, with the object-side surface being convex near the optical axis and the image-side surface being concave near the optical axis, it allows the incident light rays passing through the first lens to enter the optical lens more smoothly, which is beneficial to correcting the field curvature and astigmatism of the optical lens, enhancing the imaging stability of the optical lens, and thus improving the imaging quality of the optical lens. The third lens has positive refractive power, with the object-side surface being convex near the optical axis and the image-side surface being concave near the optical axis, further providing a reasonable incident angle for the introduction of peripheral light rays, so that the optical lens has a reasonable field of view. The fourth and fifth lenses are both positive lenses, which compress the light collected by the first, second, and third lenses, resulting in a smoother transition of incident light. This improves the relative illumination of the optical lens and effectively converges light rays from both the center and edge fields of view, thereby correcting edge aberrations, improving the resolving power of the optical lens, and further enhancing its image quality. The fifth lens's convex design near the optical axis on both its object and image sides gives it strong positive refractive power, which helps to shorten the overall optical length of the optical lens. By setting the sixth lens as a negative lens with concave object and image sides near the optical axis, stray light is avoided, and edge relative illumination is improved. The seventh lens has positive refractive power, and its convex object side near the optical axis and concave image side near the optical axis helps to correct edge aberrations and improve the resolving power of the optical lens. Setting the eighth lens as a negative lens is beneficial for correcting distortion, astigmatism, and field curvature, thereby improving image quality. The image side of the eighth lens is concave near the optical axis, which allows the optical lens to have a reasonable back focus, ensuring sufficient installation space for the filter. This reduces the sensitivity of the optical lens while achieving a shorter overall optical length, making the optical lens smaller.

[0027] Considering that optical lenses can be used in electronic devices such as in-vehicle devices and dashcams, or even in automobiles, when used as a camera on a car body, the first, second, third, fourth, fifth, sixth, seventh, and eighth lenses can all be made of glass. This allows the optical lens to achieve good optical performance while reducing the impact of temperature on these lenses. Alternatively, some lenses in the optical lens can be made of glass, while others can be made of plastic. This further reduces the impact of temperature on the lenses to achieve better imaging results, while also lowering the manufacturing cost and weight of the lenses, thus reducing the overall weight of the optical lens.

[0028] Furthermore, it is understandable that when optical lenses are used in electronic devices such as smartphones and tablets, the materials of the first, second, third, fourth, fifth, sixth, seventh, eighth, and ninth lenses can be plastic to reduce the overall weight of the optical lens.

[0029] In some embodiments, spherical lenses are considered to have the advantages of simple manufacturing process and low production cost, and they allow for flexible design of lens surface shape, thus improving the imaging resolution of optical lenses. Aspherical lenses allow for more flexible design of the object-side or image-side of the lens, enabling the lens to effectively solve problems such as unclear imaging, distorted field of view, or narrow field of view even when the lens is small and thin. Furthermore, the optical lens does not need to have too many lenses to achieve good image quality, which is beneficial for shortening the length of the optical lens. Based on this, the first, third, fourth, fifth, and sixth lenses can be spherical lenses, while the second, seventh, and eighth lenses are aspherical lenses. This combination of spherical and aspherical lenses not only improves the manufacturability of each lens and facilitates surface shape design, but also allows for more flexible design of the object-side or image-side of the lens. This allows each lens to effectively solve problems such as unclear imaging, distorted field of view, or narrow field of view even when the lens is small and thin, which is beneficial for shortening the length of the optical lens. It is understood that in other embodiments, the surfaces of each lens in the optical lens can be spherical, aspherical, or any combination of spherical and aspherical surfaces. The specific choice can be made according to actual needs, so no specific limitation is made in this embodiment.

[0030] In some embodiments, the optical lens further includes an aperture stop, which can be an aperture stop and / or a field stop. For example, the aperture stop can be an aperture stop, or a field stop, or both an aperture stop and a field stop. By placing the aperture stop between the image-side surface of the sixth lens and the object-side surface of the seventh lens, the exit pupil can be moved away from the imaging plane, reducing the effective diameter of the optical lens without reducing its telecentricity, thereby achieving miniaturization. It is understood that in other embodiments, the aperture stop can also be placed between other lenses, and the setting can be adjusted according to the actual situation. This embodiment does not specifically limit this.

[0031] In some embodiments, the optical lens further includes a filter disposed between the eighth lens and the imaging surface of the optical lens. Optionally, the filter may be an infrared cut-off filter to filter out infrared light and allow visible light to pass through, making the image more consistent with the visual experience of the human eye, thereby improving image quality. In other embodiments, the filter may be an infrared bandpass filter to allow infrared light to pass through and reflect visible light, thereby achieving infrared imaging of the optical lens, enabling the optical lens to image in low-light environments or special application scenarios and obtain better image quality. It is understood that the filter may be made of plastic, optical glass with a coating, or other materials, and can be selected according to actual needs; no specific limitation is made in this embodiment.

[0032] In some embodiments, the optical lens satisfies the relationship: 9≤TTL / IMGH≤9.6; where TTL is the distance on the optical axis from the object side of the first lens to the imaging surface of the optical lens, i.e., the total optical length, and IMGH is half of the image height corresponding to the maximum field of view of the optical lens.

[0033] Satisfying the relationship allows for a reasonable configuration of the overall optical length and image height of the lens, which is beneficial for achieving wide-angle characteristics, shortening the overall optical length for miniaturization, and improving relative illumination, thus enhancing image quality. Exceeding the upper limit of this relationship results in an excessively large overall optical length, hindering miniaturization. Conversely, falling below the lower limit leads to an excessively large image height and a large principal ray incident angle at the edges, resulting in low relative illumination and making the lens prone to vignetting.

[0034] In some embodiments, the optical lens satisfies the relationship: 11 ≤ TTL / F ≤ 20; where F is the effective focal length of the optical lens. More preferably, 13 ≤ TTL / F ≤ 18.

[0035] The above-mentioned relationship can effectively control the relationship between the total optical length of the optical lens and the effective focal length of the optical lens, thereby avoiding the situation where the size of the optical lens is too large or the effective focal length is too large, so as to achieve the miniaturization of the optical lens.

[0036] In some embodiments, the optical lenses satisfy the relationship: 1≤SD5 / SD7≤1.3; where SD5 is half of the maximum effective aperture of the object side of the third lens, and SD7 is half of the maximum effective aperture of the object side of the fourth lens.

[0037] By properly configuring the maximum effective aperture of the object side of the third and fourth lenses, the deflection angle of light rays after exiting the third lens and entering the fourth lens can be reduced, which can effectively correct aberrations and improve the assembly yield of optical lenses.

[0038] In some embodiments, the optical lens satisfies the relationship: 5.2≤SD1 / SD16≤6; where SD1 is half of the maximum effective aperture of the object side of the first lens, and SD16 is half of the maximum effective aperture of the object side of the eighth lens.

[0039] Since the first lens mainly functions to converge light, the larger the aperture of the first lens, the better the light-gathering effect. However, a larger aperture will increase the overall size of the optical lens. Therefore, when the above relationship is satisfied, it can be ensured that the apertures of the object side of the first lens and the image side of the seventh lens are within a suitable range, thereby controlling the aperture of the first lens. This allows the optical lens to have a large field of view while effectively reducing the depth of view of the entire optical lens.

[0040] In some embodiments, the optical lens satisfies the relationship: 3.2≤SD1 / IMGH≤3.5; where SD1 is half of the maximum effective aperture of the object side of the first lens.

[0041] Satisfying the above relationship ensures that the effective aperture of the first lens and the image height of the optical lens are within a suitable range, thereby controlling the aperture of the first lens to achieve a balance between illumination, field of view, and total optical length. When the range of this relationship is exceeded, the aperture of the first lens or the image height of the optical lens will exceed the range defined by the relationship, resulting in an excessively large overall size of the optical lens or poor image quality.

[0042] In some embodiments, the optical lens further includes a prism having an object-side surface and an image-side surface, and the optical lens satisfies the relationship: 0.9≤TLA / TLB≤1.4; where TLA is the distance on the optical axis from the object-side surface of the first lens to the object-side surface of the prism, and TLB is the distance on the optical axis from the image-side surface of the prism to the imaging surface of the optical lens.

[0043] By rationally configuring the total optical length of the optical lenses before and after the prism, the optical lenses before and after the prism have a centrally symmetrical structure, which helps to avoid the risk of interference during the assembly of the optical lenses.

[0044] Let Fn be the effective focal length of the nth lens, CTn be the thickness of the nth lens along the optical axis, R2n-1 be the radius of curvature of the object-side surface of the nth lens along the optical axis, and R2n be the radius of curvature of the image-side surface of the nth lens along the optical axis, where n takes any integer from 1 to 8. Specifically, the effective focal length of the first lens is F1, the thickness of the first lens along the optical axis is CT1, the radius of curvature of the object-side surface of the first lens along the optical axis is R1, the radius of curvature of the image-side surface of the first lens along the optical axis is R2, and so on.

[0045] In some embodiments, the optical lenses satisfy the following relationships: -10≤F1 / CT1≤-4; and / or, -9≤F2 / CT2≤-6; and / or, 5≤F3 / CT3≤25; and / or, 3≤F4 / CT4≤10; and / or, 3≤F5 / CT5≤5; and / or, -13≤F6 / CT6≤-10; and / or, 10≤F7 / CT7≤25; and / or, F8 / CT8≤-80.

[0046] By rationally configuring the ratio of the effective focal length of each lens to its thickness on the optical axis, the tolerance sensitivity of the thickness of each lens on the optical axis in the optical lens can be reduced, thereby reducing the processing difficulty of each lens, improving the assembly yield of the optical lens, and reducing production costs.

[0047] In some embodiments, the optical lenses satisfy the following relationship: -30mm≤R10 / (N6-N5)≤-20mm; where N5 is the refractive index of the fifth lens and N6 is the refractive index of the sixth lens.

[0048] By properly configuring the radius of curvature of the image side of the fifth lens at the optical axis, the refractive index of the fifth lens, and the refractive index of the sixth lens, it is beneficial to eliminate chromatic aberration of the optical lens, correct spherical aberration of the optical lens, and improve the imaging quality of the optical lens.

[0049] Furthermore, the cementation of the fifth and sixth lenses further enhances the effects of chromatic aberration elimination and spherical aberration correction.

[0050] In some embodiments, the optical lens satisfies the following relationship: 15mm 2 ≤F*R9 / (N5-1)≤25mm 2 Wherein, F is the effective focal length of the optical lens, and N5 is the refractive index of the fifth lens.

[0051] By rationally configuring the effective focal length of the optical lens, the refractive index of the fifth lens, and the radius of curvature of the object side at the optical axis, the design and assembly sensitivity of the optical lens can be effectively controlled, thereby improving the assembly yield of the optical lens.

[0052] In some embodiments, the optical lens satisfies the following relationships: 2.5≤R1 / R2≤3.2; and / or, R3 / R4≤8; and / or, R6 / R5≤30; and / or, |R8 / R7|≤3; and / or, -2≤R10 / R9≤-1; and / or, R12 / R11≥-2; and / or, R14 / R13≤15; and / or, 1≤R15 / R16≤2.

[0053] By controlling the ratio of the radius of curvature of the object side and the image side of the lens at the optical axis within a reasonable range, it is beneficial to control the surface shape of the lens, which in turn helps to correct astigmatism, field curvature and distortion of the optical lens, compress the total optical length of the optical lens, and realize the design requirements of making the optical lens thin, light and miniaturized.

[0054] In some embodiments, the optical lens satisfies the relationship: 4≤R16 / F≤8; where F is the effective focal length of the optical lens.

[0055] Satisfying the above relationship allows for a reasonable design of the image-side surface of the eighth lens, which helps reduce the complexity of the eighth lens's surface shape and prevents it from being excessively curved or too flat. This helps suppress field curvature and distortion in the optical lens, thereby improving the imaging quality of the optical lens. It also helps reduce the molding difficulty of the eighth lens and improve the molding yield.

[0056] In some embodiments, the optical lens satisfies the following relationships: -10≤F1 / F≤-5; and / or, -4≤F2 / F≤-2; and / or, 4≤F3 / F≤15; and / or, 2≤F4 / F≤8; and / or, 2≤F5 / F≤4; and / or, -3≤F6 / F≤-2; and / or, 5≤F7 / F≤15; and / or, F8 / F≤-20; where F is the effective focal length of the optical lens.

[0057] By rationally configuring the ratio of the focal length of each lens to the focal length of the optical lens, the refractive power of each lens can be evenly and reasonably distributed, the aberrations of the optical lens can be easily corrected, and the image quality can be good.

[0058] In some embodiments, the optical lens satisfies the relationship: VD2≥36; where VD2 is the Abbe number of the second lens.

[0059] Satisfying the above relationship can effectively control the chromatic aberration of the second lens, which in turn helps to control the overall chromatic aberration of the optical lens, reduce the risk of purple fringing, and improve the imaging quality of the optical lens.

[0060] In some embodiments, the optical lens satisfies the relationship: 0.4≤CRH / IMGH≤0.85; wherein, between the object plane and the aperture stop, there is a point on the edge principal ray, the distance of the projection of this point on the optical axis to the aperture stop on the optical axis is the same as the distance from the optical axis to the imaging plane on the optical axis, and CRH is the perpendicular distance from this point to the optical axis.

[0061] Satisfying the above relationship can effectively correct for aberrations, which is beneficial for matching optical lenses with large-sized image sensors.

[0062] In some embodiments, the optical lens satisfies the relationship: FOV≥190deg; further, the optical lens may satisfy the relationship: 195deg≤FOV≤205deg; where FOV is the maximum field of view of the optical lens.

[0063] By properly configuring the maximum field of view of the optical lens, the optical lens can have a larger field of view, which is beneficial for the optical lens to capture more scene content and thus enrich the imaging information of the optical lens.

[0064] In some embodiments, the optical lens satisfies the relationship: FNO≤2; further, the optical lens may satisfy the relationship: 1.9≤FNO≤2; where FNO is the aperture number of the optical lens.

[0065] By properly configuring the aperture number of the optical lens, it is beneficial to achieve the large aperture characteristics of the optical lens, so as to ensure image clarity even in low-light environments or at night.

[0066] The optical lens of this embodiment will be described in detail below with reference to specific parameters.

[0067] First Embodiment

[0068] like Figure 1 As shown, the optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, a prism P, a fourth lens L4, a fifth lens L5, a sixth lens L6, an aperture stop STO, a seventh lens L7, and an eighth lens L8, arranged sequentially along the optical axis O from the object side to the image side. The materials of the first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, seventh lens L7, and eighth lens L8 can be found in the specific embodiments described above, and will not be repeated here.

[0069] Furthermore, the first lens L1 has negative refractive power, the second lens L2 has negative refractive power, the third lens L3 has positive refractive power, the fourth lens L4 has positive refractive power, the fifth lens L5 has positive refractive power, the sixth lens L6 has negative refractive power, the seventh lens L7 has positive refractive power, and the eighth lens L8 has negative refractive power.

[0070] Furthermore, the object-side surface S1 and image-side surface S2 of the first lens L1 are convex and concave near the optical axis O, respectively; the object-side surface S3 and image-side surface S4 of the second lens L2 are convex and concave near the optical axis O, respectively; the object-side surface S5 and image-side surface S6 of the third lens L3 are convex and concave near the optical axis O, respectively; the object-side surface S7 and image-side surface S8 of the fourth lens L4 are both convex near the optical axis O; the object-side surface S9 and image-side surface S10 of the fifth lens L5 are both convex near the optical axis O; the object-side surface S11 and image-side surface S12 of the sixth lens L6 are both concave near the optical axis O; the object-side surface S13 and image-side surface S14 of the seventh lens L7 are convex and concave near the optical axis O, respectively; and the object-side surface S15 and image-side surface S16 of the eighth lens L8 are convex and concave near the optical axis O, respectively.

[0071] Specifically, taking the effective focal length F = 2mm, the aperture number FNO = 2, the maximum field of view FOV = 200deg, and the total optical length TTL = 31.83mm of the optical lens 100 as examples, other parameters of the optical lens 100 are given in Table 1 below. The elements along the optical axis O of the optical lens 100 from the object side to the image side are arranged sequentially according to the order of the elements in Table 1 from top to bottom. In the same lens, the surface with the smaller surface number is the object side of the lens, and the surface with the larger surface number is the image side of the lens. For example, surface numbers 1 and 2 correspond to the object side S1 and image side S2 of the first lens L1, respectively. The Y-radius in Table 1 is the radius of curvature of the object side or image side of the corresponding surface number near the optical axis O. The first value in the "thickness" parameter column of the lens is the thickness of the lens on the optical axis O, and the second value is the distance from the image side of the lens to the next surface on the optical axis O. The value of the stop STO in the "Thickness" parameter column represents the distance from the stop STO to the vertex of the next surface (the vertex refers to the intersection of the surface and the optical axis O) on the optical axis O. By default, the direction from the object side S1 of the first lens L1 to the image side of the last lens is the positive direction of the optical axis O. When this value is negative, it indicates that the stop STO is set to the right of the vertex of the next surface. If the thickness of the stop STO is positive, the stop STO is to the left of the vertex of the next surface. It is understood that the units for the Y-radius, thickness, and effective focal length in Table 1 are all mm. Furthermore, the reference wavelength for the effective focal length of each lens in Table 1 is 546.07 nm, and the reference wavelength for the refractive index and Abbe number of each lens is 587.56 nm.

[0072] Table 1

[0073]

[0074] In the first embodiment, the object-side surface and image-side surface of the second lens L2, the seventh lens L7, and the eighth lens L8 are all aspherical. The surface shape x of the aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0075]

[0076] Where x is the distance vector from the vertex of the aspherical surface along the optical axis o at a height of h; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the Y radius R in Table 1 above); k is the conic coefficient; Ai is the correction coefficient corresponding to the i-th higher-order term of the aspherical surface. Table 2 gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16 and A18 that can be used for various aspherical mirrors in the first embodiment.

[0077] Table 2

[0078] k 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 A4 -1.35545E-03 -1.21732E-03 -3.83454E-03 -2.06988E-02 -1.93935E-02 -9.60606E-03 A6 1.85325E-04 1.85696E-04 1.57147E-03 6.05302E-03 2.73567E-03 1.70903E-03 A8 -1.48992E-05 -1.07035E-05 -1.14911E-03 -2.83996E-03 -1.22419E-03 -3.92147E-04 A10 7.67756E-07 9.00464E-09 3.70498E-04 7.36118E-04 2.97932E-04 5.92364E-05 A12 -2.59424E-08 -2.79005E-09 -5.48868E-05 -1.29683E-04 -8.48593E-05 -6.51945E-06 A14 5.57812E-10 2.45177E-09 -5.18531E-08 1.26319E-05 1.77826E-05 5.16584E-07 A16 -6.92985E-12 -1.74556E-10 6.07899E-07 -4.38818E-07 -2.46773E-06 -2.48408E-08 A18 3.79781E-14 3.61237E-12 0.00000E+00 0.00000E+00 1.54421E-07 5.06663E-10

[0079] Please see Figure 2 (A) in the middle Figure 2 Figure (A) shows the spherical aberration curves of the optical lens 100 in the first embodiment at wavelengths of 656.28 nm, 546.07 nm, and 486.13 nm. Figure 2 In (A), the horizontal coordinate along the X-axis represents the focal shift, and the vertical coordinate along the Y-axis represents the normalized field of view. Figure 2 As can be seen from (A) in the first embodiment, the spherical aberration value of the optical lens 100 is better, indicating that the imaging quality of the optical lens 100 in this embodiment is better.

[0080] Please see Figure 2 (B) in the middle Figure 2 (B) in the figure is the light astigmatism diagram of the optical lens 100 in the first embodiment at a wavelength of 546.07 nm. The horizontal axis along the X-axis represents the focus shift, and the vertical axis along the Y-axis represents the field of view, in degrees (deg). The astigmatism curve represents the curvature T of the sub-arc imaging plane and the curvature S of the sagittal imaging plane, derived from... Figure 2 As can be seen from (B) in the figure, the astigmatism of the optical lens 100 is well compensated at this wavelength.

[0081] Please see Figure 2 (C) in the middle, Figure 2 (C) in the figure is the distortion curve of the optical lens 100 in the first embodiment at a wavelength of 546.07 nm. The horizontal axis along the X-axis represents the focus shift, and the vertical axis along the Y-axis represents the field of view, in degrees (deg). Figure 2As can be seen from (C), the distortion of the optical lens 100 can be corrected at a wavelength of 546.07nm.

[0082] Second Embodiment

[0083] Please refer to Figure 3 The optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, a prism P, a fourth lens L4, a fifth lens L5, a sixth lens L6, an aperture stop STO, a seventh lens L7, and an eighth lens L8, arranged sequentially along the optical axis O from the object side to the image side. The materials of the first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, seventh lens L7, and eighth lens L8 can be found in the specific embodiments described above, and will not be repeated here.

[0084] Furthermore, the first lens L1 has negative refractive power, the second lens L2 has negative refractive power, the third lens L3 has positive refractive power, the fourth lens L4 has positive refractive power, the fifth lens L5 has positive refractive power, the sixth lens L6 has negative refractive power, the seventh lens L7 has positive refractive power, and the eighth lens L8 has negative refractive power.

[0085] Furthermore, the object-side surface S1 and image-side surface S2 of the first lens L1 are convex and concave near the optical axis O, respectively; the object-side surface S3 and image-side surface S4 of the second lens L2 are convex and concave near the optical axis O, respectively; the object-side surface S5 and image-side surface S6 of the third lens L3 are convex and concave near the optical axis O, respectively; the object-side surface S7 and image-side surface S8 of the fourth lens L4 are both convex near the optical axis O; the object-side surface S9 and image-side surface S10 of the fifth lens L5 are both convex near the optical axis O; the object-side surface S11 and image-side surface S12 of the sixth lens L6 are both concave near the optical axis O; the object-side surface S13 and image-side surface S14 of the seventh lens L7 are convex and concave near the optical axis O, respectively; and the object-side surface S15 and image-side surface S16 of the eighth lens L8 are convex and concave near the optical axis O, respectively.

[0086] In the second embodiment, taking the effective focal length F = 2.275mm, the aperture number FNO = 1.95, the maximum field of view FOV = 200deg, and the total optical length TTL = 31.69mm of the optical lens 100 as an example.

[0087] The other parameters in this second embodiment are given in Table 3 below, and the definitions of each parameter can be derived from the description of the foregoing embodiments, and will not be repeated here.

[0088] Table 3

[0089]

[0090] In the second embodiment, Table 4 provides the higher-order coefficients that can be used for each aspherical surface in the second embodiment, wherein each aspherical surface shape can be defined by the formula given in the first embodiment.

[0091] Table 4

[0092]

[0093]

[0094] Please see Figure 4 ,Depend on Figure 4 (A) Spherical aberration curve of light rays in the diagram. Figure 4 (B) ray astigmatism and Figure 4 As shown in the distortion curve (C) in the figure, the longitudinal spherical aberration, astigmatism, and distortion of the optical lens 100 are all well controlled, thus the optical lens 100 of this embodiment has good imaging quality. Furthermore, regarding... Figure 4 (A) Figure 4 (B) and Figure 4 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment regarding... Figure 2 (A) Figure 2 (B) and Figure 2 The content described in (C) will not be repeated here.

[0095] Third Embodiment

[0096] Please refer to Figure 5 The optical lens 100 includes a first lens L1, a second lens L2, a prism P, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, an aperture stop STO, a seventh lens L7, and an eighth lens L8, arranged sequentially along the optical axis O from the object side to the image side. The materials of the first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, seventh lens L7, and eighth lens L8 can be found in the specific embodiments described above, and will not be repeated here.

[0097] Furthermore, the first lens L1 has negative refractive power, the second lens L2 has negative refractive power, the third lens L3 has positive refractive power, the fourth lens L4 has positive refractive power, the fifth lens L5 has positive refractive power, the sixth lens L6 has negative refractive power, the seventh lens L7 has positive refractive power, and the eighth lens L8 has negative refractive power.

[0098] Furthermore, the object-side surface S1 and image-side surface S2 of the first lens L1 are convex and concave near the optical axis O, respectively; the object-side surface S3 and image-side surface S4 of the second lens L2 are convex and concave near the optical axis O, respectively; the object-side surface S5 and image-side surface S6 of the third lens L3 are convex and concave near the optical axis O, respectively; the object-side surface S7 and image-side surface S8 of the fourth lens L4 are convex and concave near the optical axis O, respectively; the object-side surface S9 and image-side surface S10 of the fifth lens L5 are both convex near the optical axis O; the object-side surface S11 and image-side surface S12 of the sixth lens L6 are both concave near the optical axis O; the object-side surface S13 and image-side surface S14 of the seventh lens L7 are convex and concave near the optical axis O, respectively; and the object-side surface S15 and image-side surface S16 of the eighth lens L8 are convex and concave near the optical axis O, respectively.

[0099] In the third embodiment, taking the effective focal length F = 2.007mm, the aperture number FNO = 1.98, the maximum field of view FOV = 200deg, and the total optical length TTL = 33.26mm of the optical lens 100 as an example.

[0100] The other parameters in this third embodiment are given in Table 5 below, and the definitions of each parameter can be derived from the foregoing description, and will not be repeated here.

[0101] Table 5

[0102]

[0103]

[0104] In the third embodiment, Table 6 provides the higher-order coefficients that can be used for each aspherical surface in the third embodiment, wherein each aspherical surface shape can be defined by the formula given in the first embodiment.

[0105] Table 6

[0106] k 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 A4 -1.04379E-03 -1.29650E-03 -4.27991E-03 -1.67523E-02 -1.92357E-02 -9.00337E-03 A6 6.14286E-05 4.64043E-05 9.64222E-04 1.87280E-03 1.64052E-03 3.75004E-04 A8 -2.06768E-06 -1.74066E-06 -8.53249E-04 -4.51692E-04 -1.51876E-03 -3.61084E-05 A10 3.65264E-08 -7.36895E-08 2.70957E-04 -8.93171E-05 9.51587E-04 3.56736E-05 A12 -1.40259E-10 1.32742E-08 -5.43876E-05 2.64931E-05 -4.21670E-04 -1.43930E-05 A14 -5.25648E-12 -1.72006E-09 4.23238E-06 -3.75760E-06 1.05419E-04 2.44363E-06 A16 6.17067E-14 9.38347E-11 1.08286E-07 3.91678E-07 -1.46933E-05 -1.97922E-07 A18 0.00000E+00 -1.99871E-12 0.00000E+00 0.00000E+00 8.90817E-07 6.32971E-09

[0107] Please see Figure 6 ,Depend on Figure 6 (A) Spherical aberration curve of light rays in the diagram. Figure 6 (B) ray astigmatism and Figure 6 As shown in the distortion curve (C) in the figure, the longitudinal spherical aberration, astigmatism, and distortion of the optical lens 100 are all well controlled, thus the optical lens 100 of this embodiment has good imaging quality. Furthermore, regarding... Figure 6 (A) Figure 6 (B) and Figure 6 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment regarding... Figure 2 (A) Figure 2 (B) and Figure 2 The content described in (C) will not be repeated here.

[0108] Fourth embodiment

[0109] Please refer to Figure 7 The optical lens 100 includes a first lens L1, a second lens L2, a prism P, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, an aperture stop STO, a seventh lens L7, and an eighth lens L8, arranged sequentially along the optical axis O from the object side to the image side. The materials of the first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, seventh lens L7, and eighth lens L8 can be found in the specific embodiments described above, and will not be repeated here.

[0110] Furthermore, the first lens L1 has negative refractive power, the second lens L2 has negative refractive power, the third lens L3 has positive refractive power, the fourth lens L4 has positive refractive power, the fifth lens L5 has positive refractive power, the sixth lens L6 has negative refractive power, the seventh lens L7 has positive refractive power, and the eighth lens L8 has negative refractive power.

[0111] Furthermore, the object-side surface S1 and image-side surface S2 of the first lens L1 are convex and concave near the optical axis O, respectively; the object-side surface S3 and image-side surface S4 of the second lens L2 are convex and concave near the optical axis O, respectively; the object-side surface S5 and image-side surface S6 of the third lens L3 are convex and concave near the optical axis O, respectively; the object-side surface S7 and image-side surface S8 of the fourth lens L4 are convex and concave near the optical axis O, respectively; the object-side surface S9 and image-side surface S10 of the fifth lens L5 are both convex near the optical axis O; the object-side surface S11 and image-side surface S12 of the sixth lens L6 are both concave near the optical axis O; the object-side surface S13 and image-side surface S14 of the seventh lens L7 are convex and concave near the optical axis O, respectively; and the object-side surface S15 and image-side surface S16 of the eighth lens L8 are convex and concave near the optical axis O, respectively.

[0112] In the fourth embodiment, taking the effective focal length F = 2.11 mm, the aperture number FNO = 1.9, the maximum field of view FOV = 200deg, and the total optical length TTL = 33.26 mm of the optical lens 100 as an example.

[0113] The other parameters in this fourth embodiment are given in Table 7 below, and the definitions of each parameter can be derived from the foregoing description, and will not be repeated here.

[0114] Table 7

[0115]

[0116] In the fourth embodiment, Table 8 provides the higher-order coefficients that can be used for each aspherical surface in the fourth embodiment, wherein each aspherical surface shape can be defined by the formula given in the first embodiment.

[0117] Table 8

[0118]

[0119]

[0120] Please see Figure 8 ,Depend on Figure 8 (A) Spherical aberration curve of light rays in the diagram. Figure 8 (B) ray astigmatism and Figure 8 As shown in the distortion curve (C) in the figure, the longitudinal spherical aberration, astigmatism, and distortion of the optical lens 100 are all well controlled, thus the optical lens 100 of this embodiment has good imaging quality. Furthermore, regarding... Figure 8 (A) Figure 8 (B) and Figure 8 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment regarding... Figure 2 (A) Figure 2 (B) and Figure 2 The content described in (C) will not be repeated here.

[0121] Fifth embodiment

[0122] Please refer to Figure 9 The optical lens 100 includes a first lens L1, a second lens L2, a prism P, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, an aperture stop STO, a seventh lens L7, and an eighth lens L8, arranged sequentially along the optical axis O from the object side to the image side. The materials of the first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, seventh lens L7, and eighth lens L8 can be found in the specific embodiments described above, and will not be repeated here.

[0123] Furthermore, the first lens L1 has negative refractive power, the second lens L2 has negative refractive power, the third lens L3 has positive refractive power, the fourth lens L4 has positive refractive power, the fifth lens L5 has positive refractive power, the sixth lens L6 has negative refractive power, the seventh lens L7 has positive refractive power, and the eighth lens L8 has negative refractive power.

[0124] Furthermore, the object-side surface S1 and image-side surface S2 of the first lens L1 are convex and concave near the optical axis O, respectively; the object-side surface S3 and image-side surface S4 of the second lens L2 are convex and concave near the optical axis O, respectively; the object-side surface S5 and image-side surface S6 of the third lens L3 are convex and concave near the optical axis O, respectively; the object-side surface S7 and image-side surface S8 of the fourth lens L4 are convex and concave near the optical axis O, respectively; the object-side surface S9 and image-side surface S10 of the fifth lens L5 are both convex near the optical axis O; the object-side surface S11 and image-side surface S12 of the sixth lens L6 are both concave near the optical axis O; the object-side surface S13 and image-side surface S14 of the seventh lens L7 are convex and concave near the optical axis O, respectively; and the object-side surface S15 and image-side surface S16 of the eighth lens L8 are convex and concave near the optical axis O, respectively.

[0125] In the fifth embodiment, taking the effective focal length F = 1.91 mm, the aperture number FNO = 1.92, the maximum field of view FOV = 200deg, and the total optical length TTL = 33.26 mm of the optical lens 100 as an example.

[0126] The other parameters in this fifth embodiment are given in Table 9 below, and the definitions of each parameter can be derived from the foregoing description, and will not be repeated here.

[0127] Table 9

[0128]

[0129]

[0130] In the fifth embodiment, Table 10 provides the higher-order coefficients that can be used for each aspherical surface in the fifth embodiment, wherein each aspherical surface shape can be defined by the formula given in the first embodiment.

[0131] Table 10

[0132] k 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 A4 -3.00375E-03 -3.53265E-03 -3.55875E-03 -1.27989E-02 -1.62151E-02 -9.19769E-03 A6 2.62799E-04 3.67076E-04 1.12289E-03 3.30423E-03 2.60319E-03 1.09067E-03 A8 -1.36200E-05 -3.76849E-05 -1.06324E-03 -1.52698E-03 -1.12179E-03 -4.23947E-05 A10 4.47479E-07 4.38621E-06 4.31207E-04 2.24171E-04 2.27523E-04 -4.86806E-05 A12 -9.05414E-09 -4.14052E-07 -1.04893E-04 -1.69304E-05 -4.89943E-05 1.17588E-05 A14 1.02164E-10 2.37274E-08 1.20446E-05 -1.55797E-06 6.87402E-06 -1.22245E-06 A16 -4.87211E-13 -7.27649E-10 -4.46703E-07 3.71547E-07 -9.54458E-07 6.16379E-08 A18 0.00000E+00 9.03804E-12 0.00000E+00 0.00000E+00 9.69535E-08 -1.21641E-09

[0133] Please see Figure 10 ,Depend on Figure 10 (A) Spherical aberration curve of light rays in the diagram. Figure 10 (B) ray astigmatism and Figure 10 As shown in the distortion curve (C) in the figure, the longitudinal spherical aberration, astigmatism, and distortion of the optical lens 100 are all well controlled, thus the optical lens 100 of this embodiment has good imaging quality. Furthermore, regarding... Figure 10 (A) Figure 10 (B) and Figure 10 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment regarding... Figure 2 (A) Figure 2 (B) and Figure 2 The content described in (C) will not be repeated here.

[0134] Please refer to Table 11, which summarizes the ratios of the various relationships in the first to fifth embodiments of the present invention.

[0135] Table 15

[0136]

[0137]

[0138] Please see Figure 11 Secondly, the present invention also discloses a camera module 200, comprising a photosensitive chip 201 and an optical lens 100 as described in any of the first to seventh embodiments above. The photosensitive chip 201 is disposed on the image side of the optical lens 100. The optical lens 100 can be used to receive the light signal of the subject and project it onto the photosensitive chip 201, and the photosensitive chip 201 can be used to convert the light signal corresponding to the subject into an image signal. Further details are omitted here. It is understood that the camera module 200 having the aforementioned optical lens 100 possesses all the technical effects of the aforementioned optical lens 100. That is, the optical lens of this terminal device can achieve both miniaturization and superior imaging quality.

[0139] Please see Figure 12 Thirdly, the present invention also discloses a terminal device 400, which includes a fixing member 401 and a camera module 200 as described in the second aspect above, the camera module 200 being disposed on the fixing member 401. The terminal device 400 may be, but is not limited to, a mobile phone, tablet computer, laptop computer, smartwatch, monitor, dashcam, reversing camera, etc. It is understood that the terminal device 400 having the aforementioned camera module 200 also possesses all the technical effects of the aforementioned optical lens. That is, the optical lens of this terminal device can achieve both miniaturization and superior image quality.

[0140] The optical lens, camera module, and terminal device disclosed in the embodiments of the present invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only for the purpose of helping to understand the optical lens, camera module, and terminal device of the present invention and its core ideas. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. An optical lens, characterized in that, The optical lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens arranged sequentially along the optical axis from the object side to the image side; The first lens has negative refractive power, the object side of the first lens is convex near the optical axis, and the image side of the first lens is concave near the optical axis. The second lens has negative refractive power, the object side of the second lens is convex near the optical axis, and the image side of the second lens is concave near the optical axis; The third lens has positive refractive power, the object side of the third lens is convex near the optical axis, and the image side of the third lens is concave near the optical axis. The fourth lens has positive refractive power, and the object side of the fourth lens is convex near the optical axis; The fifth lens has positive refractive power, the object side of the fifth lens is convex near the optical axis, and the image side of the fifth lens is convex near the optical axis. The sixth lens has negative refractive power, the object side of the sixth lens is concave near the optical axis, and the image side of the sixth lens is concave near the optical axis. The seventh lens has positive refractive power, the object side of the seventh lens is convex near the optical axis, and the image side of the seventh lens is concave near the optical axis. The eighth lens has negative refractive power, the object side of the eighth lens is convex near the optical axis, and the image side of the eighth lens is concave near the optical axis. The lens with refractive power consists of eight elements; The optical lens satisfies the following relationship: 9≤TTL / IMGH≤9.6; Wherein, TTL is the distance on the optical axis from the object side of the first lens to the imaging surface of the optical lens, and IMGH is half the image height corresponding to the maximum field of view of the optical lens.

2. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relationship: 11≤TTL / F≤20; Wherein, F is the effective focal length of the optical lens.

3. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relationship: 1≤SD5 / SD7≤1.3, and / or, 5.2≤SD1 / SD16≤6, and / or, 3.2≤SD1 / IMGH≤3.5; Wherein, SD1 is half of the maximum effective aperture of the object side of the first lens, SD5 is half of the maximum effective aperture of the object side of the third lens, SD7 is half of the maximum effective aperture of the object side of the fourth lens, and SD16 is half of the maximum effective aperture of the object side of the eighth lens.

4. The optical lens according to claim 1, characterized in that, The optical lens also includes a prism, and the optical lens satisfies the following relationship: 0.9 ≤ TLA / TLB ≤ 1.4; Wherein, TLA is the distance on the optical axis from the object side of the first lens to the object side of the prism, and TLB is the distance on the optical axis from the image side of the prism to the imaging surface of the optical lens.

5. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relationship: -10≤F1 / CT1≤-4, and / or, 3≤F4 / CT4≤10, and / or, 10≤F7 / CT7≤25; Wherein, F1 is the effective focal length of the first lens, F4 is the effective focal length of the fourth lens, F7 is the effective focal length of the seventh lens, CT1 is the thickness of the first lens on the optical axis, CT4 is the thickness of the fourth lens on the optical axis, and CT7 is the thickness of the seventh lens on the optical axis.

6. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relationship: -30mm≤R10 / (N6-N5)≤-20mm, and / or, 15mm 2 ≤F*R9 / (N5-1)≤25mm 2 Wherein, R9 is the radius of curvature of the object side of the fifth lens at the optical axis, R10 is the radius of curvature of the object side of the fifth lens at the optical axis, N5 is the refractive index of the fifth lens, N6 is the refractive index of the sixth lens, and F is the effective focal length of the optical lens.

7. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relationship: R12 / R11≥-2, and / or, 4≤R16 / F≤8; Wherein, R11 is the radius of curvature of the object side of the sixth lens at the optical axis, R12 is the radius of curvature of the image side of the sixth lens at the optical axis, R16 is the radius of curvature of the image side of the eighth lens at the optical axis, and F is the effective focal length of the optical lens.

8. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relationship: -10≤F1 / F≤-5, and / or, 4≤F3 / F≤15, and / or, 2≤F5 / F≤4, and / or, F8 / F≤-20; Wherein, F1 is the effective focal length of the first lens, F3 is the effective focal length of the third lens, F5 is the effective focal length of the fifth lens, F8 is the effective focal length of the eighth lens, and F is the effective focal length of the optical lens.

9. A camera module, characterized in that, The camera module includes a photosensitive chip and an optical lens as described in any one of claims 1-8, wherein the photosensitive chip is disposed on the image side of the optical lens.

10. A terminal device, characterized in that, The terminal device includes a fixing component and a camera module as described in claim 9, wherein the camera module is disposed on the fixing component.

Images