Optical lens, camera module and terminal equipment

Abstract

Provided are an optical lens, a camera module and a terminal device, the optical lens comprises eight lenses with refractive power, and the eight lenses from an object side to an image side along an optical axis comprise: a first lens with negative refractive power, an object side surface being a convex surface at a paraxial position, and an image side surface being a concave surface at a paraxial position; a second lens element with negative refractive power having an object-side surface being concave in a paraxial region thereof; a third lens element with positive refractive power, the object-side surface and the image-side surface of the third lens element being convex in a paraxial region; a fourth lens element with positive refractive power, the object-side surface of the fourth lens element being convex in a paraxial region; a fifth lens element with refractive power; the sixth lens element with refractive power has an object-side surface being convex in a paraxial region thereof. A seventh lens element with refractive power, the image-side surface of the seventh lens element being convex in a paraxial region; an eighth lens element with refractive power, the image-side surface of the eighth lens element being concave in a paraxial region; the optical lens meets the following relational expression that FOV is larger than or equal to 105 degrees and smaller than or equal to 115 degrees. The optical lens has the characteristic of large field angle, and the imaging quality of the optical lens is improved.

Description

Technical Field

[0001] The present application relates to the field of optical imaging technology, and in particular to an optical lens, a camera module and a terminal device. Background Art

[0002] With the rapid development of automobile assisted driving systems in recent years, optical lenses have been widely used in automobiles. Among them, optical lenses can be widely used in vehicle-mounted reversing visual systems, driving recorders, automatic parking and panoramic parking systems, road finding systems, etc. Vehicle-mounted lenses are key components for automatic driving assistance systems to obtain external information. With the rapid development of automatic driving assistance systems, the performance requirements for forward-looking optical lenses are becoming higher and higher, and are developing in the direction of high resolution, large field of view and small distortion. The field of view of optical lenses in the prior art is not large enough, and the imaging quality is low, which easily leads to problems such as too small a monitoring range for taking photos and the existence of many blind spots for taking photos. It is impossible to meet the requirements of smart vehicles, monitoring systems and other fields for optical lenses to have a large field of view and high imaging quality. Summary of the invention

[0003] In view of the above, it is necessary to propose an optical lens, a camera module and a terminal device so as to have a higher imaging quality while having a larger field of view.

[0004] In order to achieve the above-mentioned purpose, in the first aspect, the present application discloses an optical lens, which has a total of eight lenses with refractive power, and includes, in order from the object side to the image side along the optical axis: a first lens, which has negative refractive power, the object side surface of the first lens is convex at the near optical axis, and the image side surface of the first lens is concave at the near optical axis; a second lens, which has negative refractive power, the object side surface of the second lens is concave at the near optical axis; a third lens, which has positive refractive power, the object side surface and the image side surface of the third lens are both convex at the near optical axis; a fourth lens , having positive refractive power, the object side surface of the fourth lens is convex at the near optical axis; the fifth lens has refractive power; the sixth lens has refractive power, the object side surface of the sixth lens is convex at the near optical axis; the seventh lens has refractive power, the image side surface of the seventh lens is convex at the near optical axis; the eighth lens has refractive power, the image side surface of the eighth lens is concave at the near optical axis; the optical lens satisfies the following relationship: 105°≤FOV≤115°; wherein FOV is the maximum field of view angle of the optical lens.

[0005] In the optical lens provided by the present application, the first lens has a negative refractive power, the object side is a convex surface, the image side is a concave surface, and the convex surface is facing the meniscus shape of the object side, which can effectively collect the incident light of a large field angle. The second lens has a negative refractive power, and the object side is a concave surface, which can preliminarily correct the astigmatism of the optical lens, and effectively control the trend of light at the same time, and realize a larger aperture. The third lens has a positive refractive power, and the object side is a convex surface, and the image side can be a convex surface, which can effectively collect and compress the incident light of the object side, so that the light smoothly transitions to the lens on the image side. The fourth lens has a positive refractive power, and the object side is a convex surface, which is conducive to lowering the incident angle of the light after the light passes through the aperture, so that more light enters the lens on the image side, and improves the illumination of the optical lens. The fifth lens, the sixth lens, the seventh lens and the eighth lens all have refractive power, and the object side of the sixth lens is convex at the near optical axis, the image side of the seventh lens is convex at the near optical axis, and the image side of the eighth lens is concave at the near optical axis, which can effectively control the trend of light and help improve the imaging quality. When 105°≤FOV≤115°, the optical lens has a larger field of view, which is beneficial for the optical lens to obtain more scene content, thereby enriching the imaging information of the optical lens.

[0006] In a second aspect, the present application discloses a camera module, the camera module comprising a photosensitive chip and the optical lens as described in the first aspect, the photosensitive chip being arranged on the image side of the optical lens. The camera module having the optical lens can realize a miniaturized design of the optical lens, and at the same time enables the optical lens to have the characteristic of a large field of view, thereby improving the imaging quality of the optical lens.

[0007] In a third aspect, the present application discloses a terminal device, comprising a housing and a camera module as described in the second aspect, wherein the camera module is arranged in the housing. The electronic device having the camera module realizes a miniaturized design of an optical lens, and at the same time enables the optical lens to have the characteristic of a large field of view, thereby improving the imaging quality of the optical lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the structure of the optical lens disclosed in the first embodiment of the present application.

[0009] Figure 2 It is a longitudinal spherical aberration curve diagram, an astigmatism curve diagram and a distortion curve diagram of the optical lens disclosed in the first embodiment of the present application.

[0010] Figure 3 It is a schematic diagram of the structure of the optical lens disclosed in the second embodiment of the present application.

[0011] Figure 4 It is a longitudinal spherical aberration curve diagram, an astigmatism curve diagram and a distortion curve diagram of the optical lens disclosed in the second embodiment of the present application.

[0012] Figure 5 It is a schematic diagram of the structure of the optical lens disclosed in the third embodiment of the present application.

[0013] Figure 6 It is a longitudinal spherical aberration curve diagram, an astigmatism curve diagram and a distortion curve diagram of the optical lens disclosed in the third embodiment of the present application.

[0014] Figure 7 It is a schematic diagram of the structure of the optical lens disclosed in the fourth embodiment of the present application.

[0015] Figure 8 It is a longitudinal spherical aberration curve diagram, an astigmatism curve diagram and a distortion curve diagram of the optical lens disclosed in the fourth embodiment of the present application.

[0016] Fig. 9 It is a schematic diagram of the structure of the optical lens disclosed in the fifth embodiment of the present application.

[0017] Fig.10 It is a longitudinal spherical aberration curve diagram, an astigmatism curve diagram and a distortion curve diagram of the optical lens disclosed in the fifth embodiment of the present application.

[0018] Fig.11 It is a schematic diagram of the structure of the optical lens disclosed in the sixth embodiment of the present application.

[0019] Fig.12 It is a longitudinal spherical aberration curve diagram, an astigmatism curve diagram and a distortion curve diagram of the optical lens disclosed in the sixth embodiment of the present application.

[0020] Fig.13 It is a schematic diagram of the structure of the optical lens disclosed in the seventh embodiment of the present application.

[0021] Fig.14 It is a longitudinal spherical aberration curve diagram, an astigmatism curve diagram and a distortion curve diagram of the optical lens disclosed in the seventh embodiment of the present application.

[0022] Fig.15 It is a schematic diagram of the structure of the optical lens disclosed in the eighth embodiment of the present application.

[0023] Fig.16 It is a longitudinal spherical aberration curve diagram, an astigmatism curve diagram and a distortion curve diagram of the optical lens disclosed in the eighth embodiment of the present application.

[0024] Fig.17 It is a structural schematic diagram of the camera module disclosed in this application.

[0025] Fig.18 It is a structural schematic diagram of the terminal device disclosed in this application. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] First, see Figure 1 The embodiment of the present application discloses an optical lens 100, which has a total of eight lenses with refractive power, which are, from the object side to the image side along the optical axis O, a first lens L1 with negative refractive power, a second lens L2 with negative refractive power, a third lens L3 with positive refractive power, a fourth lens L4 with positive refractive power, a fifth lens L5, a sixth lens L6, a seventh lens L7 and an eighth lens L8.

[0028] Further, the object-side surface S1 of the first lens L1 is convex at the near optical axis O, and the image-side surface S2 of the first lens L1 is concave at the near optical axis O; the object-side surface S3 of the second lens L2 is concave at the near optical axis O; the object-side surface S5 of the third lens L3 is convex at the near optical axis O, and the image-side surface S6 of the third lens L3 is convex at the near optical axis O; the object-side surface S7 of the fourth lens L4 is convex at the near optical axis O; the object-side surface S9 and the image-side surface S10 of the fifth lens L5 are both aspherical surfaces; the object-side surface S11 of the sixth lens L6 is convex at the near optical axis O; the image-side surface S14 of the seventh lens L7 is convex at the near optical axis O, and the sixth lens L6 and the seventh lens L7 are a cemented lens; the image-side surface S16 of the eighth lens L8 is concave at the near optical axis O, and the object-side surface S15 and the image-side surface S16 of the eighth lens L8 are both aspherical surfaces.

[0029] In the optical lens 100 provided in the embodiment of the present application, the first lens L1 has a negative refractive power, the object side S1 is a convex surface, the image side S2 is a concave surface, and the convex surface is facing the meniscus shape of the object side, which can effectively collect incident light with a large field angle, and realize the maximum field angle of the optical lens 100 is greater than or equal to 105°. The second lens L2 has a negative refractive power, and the object side S3 is a concave surface, which can preliminarily correct the astigmatism of the optical lens 100, and effectively control the trend of light to achieve a larger aperture. The third lens L3 has a positive refractive power, and the object side S5 is a convex surface, and the image side S6 can be a convex surface, which can effectively collect and compress the incident light on the object side, so that the light smoothly transitions to the lens on the image side. The fourth lens L4 has a positive refractive power, and the object side S7 is a convex surface, which is conducive to lowering the incident angle of the light after the light passes through the aperture, so that more light enters the lens on the image side, and improves the illumination of the optical lens 100. The fifth lens L5, the sixth lens L6, the seventh lens L7 and the eighth lens L8 all have refractive power, and the object-side surface S11 of the sixth lens L6 is a convex surface at the near optical axis O, the image-side surface S14 of the seventh lens L7 is a convex surface at the near optical axis O, and the image-side surface S14 of the seventh lens L7 is a convex surface at the near optical axis O, which can effectively control the trend of light and is beneficial to improving imaging quality.

[0030] In some embodiments, the optical lens 100 further includes a stop STO, which may be an aperture stop and / or a field stop. By arranging the stop STO between the image side surface S10 of the third lens L5 and the object side surface S11 of the sixth lens L6, the exit pupil can be moved away from the imaging surface IMG, and the effective diameter of the optical lens 100 can be reduced without reducing the telecentricity of the optical lens 100, thereby achieving miniaturization.

[0031] In some embodiments, the optical lens 100 further includes a filter IR, which is disposed between the eighth lens L8 and the imaging surface IMG of the optical lens 100. Optionally, the filter IR may be an infrared cutoff filter to filter out infrared light and pass visible light, so that the imaging is more in line with the visual experience of the human eye, thereby improving the imaging quality. In other embodiments, the filter IR may be an infrared bandpass filter to allow infrared light to pass through and reflect visible light to achieve infrared imaging of the optical lens 100, so that the optical lens 100 can be imaged in a dark environment or special application scenarios and obtain better imaging quality.

[0032] In some embodiments, the optical lens 100 satisfies the relationship: 105° ≤ FOV ≤ 115°. Wherein, FOV is the maximum field of view angle of the optical lens 100. Specifically, FOV can be 106°, 109°, 111°, 112°, 113° or 114.9°, etc. When the above relationship is satisfied, the optical lens 100 has a relatively large field of view angle, which is beneficial for the optical lens 100 to obtain more scene content, thereby enriching the imaging information of the optical lens 100.

[0033] In some embodiments, the optical lens 100 satisfies the relationship: 1.2 < SD11 / IMGH < 1.6. Wherein, SD11 is half of the maximum effective aperture of the object side surface S1 of the first lens L1, and IMGH is the radius of the maximum effective imaging circle on the imaging surface IMG of the optical lens 100. Specifically, SD11 / IMGH can be 1.21, 1.26, 1.3, 1.35, 1.4, 1.45, 1.5 or 1.59, etc. When the optical lens 100 satisfies the above relationship, since the first lens L1 mainly functions to converge light, the larger the aperture of the first lens L1, the better the light collection effect. However, a larger aperture will increase the overall size of the optical lens 100. Therefore, when the above relationship is satisfied, it can ensure that the aperture of the first lens L1 and the image height of the optical lens 100 are within a suitable range, thereby controlling the aperture of the first lens L1 so as to balance the illuminance, field of view angle and size.

[0034] In some embodiments, the optical lens 100 satisfies the relationship: 39mm < TTL*IMGH / F < 43mm; wherein, TTL is the distance from the object side surface S1 of the first lens L1 to the imaging surface IMG of the optical lens 100 on the optical axis O, IMGH is the radius of the maximum effective imaging circle on the imaging surface IMG of the optical lens, and F is the effective focal length of the optical lens 100. Specifically, TTL*IMGH / F can be 39.1mm, 39.5mm, 40mm, 40.5mm, 41mm, 41.7mm, 42.1mm or 42.9mm, etc. When this relationship is satisfied, it can meet the requirement that the optical lens 100 is adapted to a large-sized imaging surface IMG, meet the market demand for miniaturization of the optical lens 100, and enable the optical lens 100 to meet the market demands of large target surfaces and miniaturization simultaneously.

[0035] In some embodiments, the optical lens 100 satisfies the relationship: 6.2 < TTL / IMGH < 7; where TTL is the distance from the object side surface S1 of the first lens L1 to the imaging surface IMG of the optical lens 100 on the optical axis O, and IMGH is the radius of the largest effective imaging circle on the imaging surface IMG of the optical lens 100. Specifically, TTL / IMGH can be 6.21, 6.3, 6.4, 6.5, 6.6, 6.7, 6.8, or 6.99, etc. When the optical lens 100 satisfies the above relationship, with the reasonable configuration of the refractive powers of each lens, the optical lens 100 can obtain good thinness and lightness, have good aberration balance and image quality improvement ability, and at the same time support high-pixel photosensitive chips. In addition, IMGH can determine the size of the photosensitive chip. The larger IMGH is, the larger the maximum size of the photosensitive chip that can be supported is.

[0036] In some embodiments, the optical lens 100 satisfies the relationship: 4.2 < TTL / SD11 < 5.6; where TTL is the distance from the object side surface S1 of the first lens L1 to the imaging surface IMG of the optical lens 100 on the optical axis O, and SD11 is half of the maximum effective aperture of the object side surface S1 of the first lens L1. Specifically, TTL / SD11 can be 4.21, 4.4, 4.6, 4.9, 5.2, 5.4, 5.5, or 5.59, etc. By reasonably configuring the ratio of the distance from the object side surface S1 of the first lens L1 to the imaging surface IMG of the optical lens 100 on the near optical axis O and the maximum effective semi-aperture of the object side surface S1 of the first lens L1, it helps to shorten the total length of the optical lens 100, increase the field of view angle of the optical lens 100, and achieve the wide-angle feature.

[0037] In some embodiments, the optical lens 100 satisfies the relationship: 3 < R11 / F < 15; where R11 is the radius of curvature of the object side surface S1 of the first lens L1 at the optical axis O, and F is the effective focal length of the optical lens 100. Specifically, R11 / F can be 3.1, 5, 7, 9, 11, 13, 14, or 14.9, etc. By controlling the ratio of the radius of curvature of the object side surface S1 of the first lens L1 at the optical axis 0 to the focal length of the optical lens 100, the refractive power of the first lens L1 can be controlled within a reasonable range, which is beneficial to balancing the refractive power borne by the first lens L1 in the optical lens 100, and further beneficial to balancing the high-order coma of the optical lens 100, so that the optical lens 100 has good imaging quality.

[0038] In some embodiments, the optical lens 100 satisfies the relational expression: 1.3 < F3 / F < 2.3; where F3 is the effective focal length of the third lens L3, and F is the effective focal length of the optical lens 100. Specifically, F3 / F can be 1.31, 1.5, 1.7, 1.9, 2, 2.1, 2.2, or 2.29, etc. Since light rays are emitted from the first lens L1 and the second lens L2 with relatively strong refractive power, this often causes a relatively large field curvature when the light rays in the marginal field of view enter the imaging surface IMG. Therefore, by reasonably setting the effective focal length of the third lens L3, the incident light rays in the front can be effectively collected and compressed, enabling the light rays to smoothly transition to the optical lens 100 at the rear, reducing the generation of aberrations, and thus improving the imaging quality of the optical lens 100.

[0039] In some embodiments, the optical lens 100 satisfies the relational expression: 1 < |F6 / F| < 1.6; where F6 is the effective focal length of the sixth lens L6, and F is the effective focal length of the optical lens 100. Specifically, |F6 / F| can be 1.01, 1.2, 1.3, 1.35, 1.4, 1.45, 1.5, or 1.59, etc. By making the above limitation on the relationship between the focal length of the sixth lens L6 and the effective focal length of the optical lens 100, it helps to correct the aberrations of the optical lens 100, and at the same time, it can reduce the temperature sensitivity of the optical lens 100, and further improve the imaging quality of the optical lens 100.

[0040] In some embodiments, the optical lens 100 satisfies the relational expression: 3 < R11 / R12 < 13; where R11 is the curvature radius of the object side surface S1 of the first lens L1 at the optical axis O, and R12 is the curvature radius of the image side surface S2 of the first lens L1 at the optical axis O. Specifically, R11 / R12 can be 3.1, 4, 5, 7, 9, 10, 11, or 12.9, etc. When the optical lens 100 satisfies the above relational expression, it is beneficial to control the shape and bending degree of the first lens L1, thereby effectively reducing the aberration introduction value of the incident light rays, promoting the aberration balance of the optical lens 100. At the same time, it can also reduce the processing difficulty of the first lens L1, which is beneficial to the manufacturing and forming of the first lens L1, and improve the processing technology of the optical lens 100.

[0041] In some embodiments, both the object side surface S9 and the image side surface S10 of the fifth lens L5 are aspherical surfaces. By setting the surface shape of the fifth lens L5 as an aspherical surface, through the design of the aspherical surface, the astigmatism of the optical lens 100 can be effectively corrected, and at the same time, the trend of the light rays can be effectively controlled, which is also beneficial to improving the imaging quality.

[0042] In some embodiments, the optical lens 100 satisfies the relation: 1.9 < R52 / R51 < 30; where R52 is the radius of curvature of the image side surface S10 of the fifth lens L5 at the optical axis O, and R51 is the radius of curvature of the object side surface S9 of the fifth lens L5 at the optical axis O. Specifically, R52 / R51 can be 1.901, 5, 10, 15, 19, 23, 25, or 29.999, etc. When the optical lens 100 satisfies the above conditional formula, the surface shape of the fifth lens L5 can be reasonably controlled, the contribution of the astigmatism amount of the fifth lens L5 can be effectively controlled, the imaging quality of the middle field of view can be guaranteed, it is beneficial to correct the aberration of the optical lens 100, ensure the balance of the distortion amount of the optical lens 100. At the same time, it is avoided that the surface shapes of the object side surface S9 and the image side surface S10 of the fifth lens L5 at the optical axis O are too curved, which is beneficial to reducing the processing difficulty of the fifth lens L5 and improving the yield rate of the fifth lens L5.

[0043] In some embodiments, both the object side surface S15 and the image side surface S16 of the eighth lens L8 are aspherical surfaces. By setting the surface shape of the eighth lens L8 as an aspherical surface and through the design of aspherical surface reverse curvature, the distortion of the edge field of view can be effectively corrected, realizing low distortion of the optical lens 100, and at the same time, it is beneficial to improving the imaging quality. By setting the sixth lens L6 and the seventh lens L7 as cemented lenses, it is beneficial to correcting chromatic aberration and balancing various aberrations, improving resolution, and can effectively reduce the tolerance sensitivity and improve the imaging quality of the optical lens 100.

[0044] In some embodiments, the optical lens 100 satisfies the relation: 0 < |R81 / R82| < 35; where R15 is the radius of curvature of the object side surface S15 of the eighth lens L8 at the optical axis O, and R16 is the radius of curvature of the image side surface S16 of the eighth lens L8 at the optical axis O. Specifically, |R81 / R82| can be 0.1, 5, 10, 15, 20, 25, 30, or 34.9, etc. When the above relation is satisfied, it is beneficial to reasonably configure the ratio of the radius of curvature of the object side surface S15 and the image side surface S16 of the eighth lens L8 at the optical axis O, reasonably set the difference between the two radii of curvature, adjust the refractive power within a reasonable range, and reduce the deflection angle of the full-field light rays in the optical lens 100, and control the generation and correction of aberrations.

[0045] In some embodiments, the optical lens 100 satisfies the relational expression: 1.4 < ∑CT / ∑AT < 2.1; where ∑CT is the sum of the thicknesses of the first lens L1 to the eighth lens L8 on the optical axis O respectively, and ∑AT is the sum of the gaps of the first lens L1 to the eighth lens L8 on the optical axis O. Specifically, ∑CT / ∑AT can be 1.41, 1.5, 1.6, 1.7, 1.8, 1.9, 2, or 2.09, etc. By satisfying the above relational expression, the step difference between the lenses of the optical lens 100 can be effectively shortened by reasonably configuring the air gap, and it is beneficial to the abutment design of the lenses of the optical lens 100, thereby improving the assembly yield of the optical lens 100. If it exceeds the upper limit of the relational expression, the lenses are too close to each other, which easily causes collisions between the lenses; if it is lower than the lower limit of the relational expression, the intervals between the lenses are relatively large, which is not conducive to the assembly of the lenses.

[0046] In some embodiments, the optical lens 100 satisfies the relational expression: 1.2 < SD11 / SD82 < 1.81; where SD11 is half of the maximum effective aperture of the object side S1 of the first lens L1, and SD16 is half of the maximum effective aperture of the image side S16 of the eighth lens L8. Specifically, SD11 / SD82 can be 1.21, 1.3, 1.4, 1.5, 1.6, 1.65, 1.75, or 1.809, etc. Since the first lens L1 mainly functions to converge light rays, the larger the aperture of the first lens L1, the better the light-receiving effect. However, a larger aperture will increase the overall size of the optical lens 100. Therefore, when the above relational expression is satisfied, it can ensure that the apertures of the object side S1 of the first lens L1 and the image side S16 of the eighth lens L8 are within a suitable range, thereby controlling the aperture of the first lens L1, so that while the optical lens 100 has a large field of view angle, the viewpoint depth of the entire optical lens 100 can be effectively reduced.

[0047] In some embodiments, the optical lens 100 satisfies the relational expression: -15 < F1 / CT1 < -5; where F1 is the effective focal length of the first lens L1, and CT1 is the thickness of the first lens L1 on the optical axis O. Specifically, F1 / CT1 can be -14.9, -12, -10, -8, -7, -6, -5.2, or -5.1, etc. Since the first lens L1 is closest to the object side, setting the first lens L1 as a lens with negative refractive power can enable the incident light rays entering the optical lens 100 at large angles to enter smoothly, thereby expanding the field of view angle range of the optical lens 100 and ensuring the imaging quality of the optical lens 100.

[0048] In some embodiments, the sixth lens L6 and the seventh lens L7 are cemented lenses.

[0049] The optical lens 100 satisfies the relationship: 0 < F / F67 < 0.3; where F is the effective focal length of the optical lens 100, and F67 is the combined effective focal length of the sixth lens L6 and the seventh lens L7. Specifically, F / F67 can be 0.01, 0.05, 0.1, 0.15, 0.18, 0.2, 0.25, or 0.29, etc. Satisfying the above relationship and reasonably configuring the ratio relationship between the combined effective focal length of the sixth lens L6 and the seventh lens L7 and the effective focal length of the optical lens 100 is beneficial to correcting the off-axis aberration of the optical lens 100 and improving the imaging quality of the optical lens 100.

[0050] In some embodiments, the optical lens 100 satisfies the relationship: 0.12 < (CT6 + CT7) / TTL < 0.2; where CT6 is the thickness of the sixth lens L6 on the optical axis O, CT7 is the thickness of the seventh lens L7 on the optical axis O, and TTL is the distance from the object side surface S1 of the first lens L1 to the imaging surface IMG of the optical lens 100 on the optical axis O. Specifically, (CT6 + CT7) / TTL can be 0.121, 0.13, 0.14, 0.15, 0.16, 0.17, 0.18, or 0.199, etc. By appropriately increasing the central thickness of the cemented lenses, it is beneficial to enhance their light control ability, beneficial to regulating more light to enter the rear system, and improving the relative illumination.

[0051] In some embodiments, the optical lens 100 satisfies the relationship: 0.3mm -1 <|(VD6 - VD7) / F67| < 2mm -1 ; where VD6 is the Abbe number of the material used for the sixth lens L6, VD7 is the Abbe number of the material used for the seventh lens L7, and F67 is the combined effective focal length of the sixth lens L6 and the seventh lens L7. Specifically, |(VD6 - VD7) / F67| can be 0.31, 0.5, 0.7, 0.9, 1.2, 1.4, 1.6, or 1.99, etc. By reasonably setting the ratio of the Abbe number difference between the sixth lens L6 and the seventh lens L7 to the combined effective focal length of the sixth lens L6 and the seventh lens L7, the chromatic aberration of the optical lens 100 can be effectively corrected, the authenticity of colors can be restored, and the imaging quality can be improved.

[0052] In some embodiments, the optical lens 100 satisfies the relation: 1 < SD12 / SD21 < 1.2; where SD12 is half of the maximum effective aperture of the image side S2 of the first lens L1, and SD21 is half of the maximum effective aperture of the object side S3 of the second lens L2. Specifically, SD12 / SD21 can be 1.001, 1.11, 1.12, 1.13, 1.15, 1.17, 1.18, 1.19, etc. Satisfying the above relation can reasonably configure the ratio of the maximum effective semi-aperture of the image side S2 of the first lens L1 to the object side S3 of the second lens L2, which is beneficial to reducing the step difference between the first lens L1 and the second lens L2, so that the light can smoothly transition between the first lens L1 and the second lens L2, and further is beneficial to correcting off-axis field aberration and improving imaging quality.

[0053] In some embodiments, the optical lens 100 satisfies the relation: 0 < CT56 / (CT5 + CT6) < 0.75; where CT56 is the distance between the image side S10 of the fifth lens L5 and the object side S11 of the sixth lens L6 on the optical axis O, CT5 is the thickness of the fifth lens L5 on the optical axis O, and CT6 is the thickness of the sixth lens L6 on the optical axis O. Specifically, CT56 / (CT5 + CT6) can be 0.01, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.74, etc. Satisfying the above relation can effectively avoid too large an air gap between the fifth lens L5 and the sixth lens L6 on the optical axis O. On the one hand, it is beneficial to the correction of the aberration of the optical lens 100, thereby improving the imaging quality of the optical lens 100. On the other hand, it provides space for the structural and forming rationality of the non-effective diameter of the sixth lens L6, and ensures the overall feasibility in a small-size lens barrel.

[0054] In some embodiments, the optical lens 100 satisfies the relation: 0 < CT78 / CT8 < 1.7; where CT78 is the distance between the image side S14 of the seventh lens L7 and the object side S15 of the eighth lens L8 on the optical axis O, and CT8 is the thickness of the eighth lens L8 on the optical axis O. Specifically, CT78 / CT8 can be 0.1, 0.3, 0.5, 0.7, 0.9, 1.3, 1.5, 1.69, etc. Satisfying the above relation can effectively avoid too large an air gap between the seventh lens L7 and the eighth lens L8 on the optical axis O, which is beneficial to the correction of the aberration of the optical lens 100, thereby improving the imaging quality of the optical lens 100.

[0055] In some embodiments, the optical lens 100 satisfies the relation: 64° < FOV / FNO < 71°; where FOV is the maximum field of view angle of the optical lens 100, and FNO is the f-number of the optical lens 100. Specifically, FOV / FNO can be 64.1°, 65°, 66°, 67°, 68°, 69°, 70° or 70.9°, etc. When the optical lens 100 satisfies the above relation, the field of view angle and the light passing amount of the optical lens 100 can be reasonably controlled, the distortion of the edge field of view can be improved, and the excessive light flux of the optical lens 100 can be prevented.

[0056] In some embodiments, the optical lens 100 satisfies the relation: 5.9 < TTL / F < 6.3; where TTL is the distance from the object side surface S1 of the first lens L1 to the imaging surface IMG of the optical lens 100 on the optical axis O, and F is the effective focal length of the optical lens 100. Specifically, TTL / F can be 5.91, 5.93, 5.97, 5.99, 6, 6.1, 6.2 or 6.29, etc. When the above relation is satisfied, by reasonably configuring the total optical length of the optical lens 100 and the focal length of the optical lens 100, while satisfying the field of view angle range of the optical lens 100, the total optical length of the optical lens 100 can be reasonably controlled, and the miniaturization characteristics of the optical lens 100 can also be satisfied.

[0057] In some embodiments, the optical lens 100 satisfies the relation: 1 < F / IMGH < 1.15; where F is the effective focal length of the optical lens 100, and IMGH is the radius of the largest effective imaging circle on the imaging surface IMG of the optical lens 100. Specifically, F / IMGH can be 1.01, 1.03, 1.05, 1.07, 1.09, 1.11, 1.13 or 1.14, etc. When the optical lens 100 satisfies the above relation, the distortion generated by the optical lens 100 can be effectively corrected, thereby improving the imaging quality of the optical lens 100 while reducing the manufacturing difficulty of the optical lens 100; in addition, it can help to control the focal length of the optical lens 100 within a reasonable range, and ensure that the optical lens 100 has a sufficient light receiving area and a sufficient field of view angle, so as to simultaneously satisfy the characteristics of a large field of view angle and a large image surface.

[0058] In some embodiments, the optical lens 100 satisfies the relation: 1.6 < FNO < 1.65; where FNO is the f-number of the optical lens 100. Specifically, FNO can be 1.605, 1.608, 1.61, 1.615, 1.621, 1.625, 1.63, 1.649, etc. When the optical lens 100 satisfies the above relation, it has the characteristic of a large aperture. The optical lens 100 has sufficient light input, enabling the images captured by the optical lens 100 to be clearer, so that it can be applied to object space scenes with low light brightness such as shooting high-quality night scenes and starry skies. In addition, it can also avoid introducing excessive aberrations, making the optical lens 100 achieve an overall balance.

[0059] In some embodiments, the optical lens 100 satisfies the relation: -2 < F1 / F < -1.5; where F1 is the effective focal length of the first lens L1, and F is the effective focal length of the optical lens 100. Specifically, F1 / F can be -1.99, -1.9, -1.85, -1.8, -1.75, -1.7, -1.6, -1.51, etc. When the optical lens 100 satisfies the above relation, the ratio of the focal length of the first lens L1 to the focal length of the optical lens 100 can be reasonably configured. For the entire optical lens 100, the refractive power of the first lens L1 will not be too strong, avoiding introducing too much spherical aberration, and enabling the optical lens 100 to have good imaging quality.

[0060] In some embodiments, the optical lens 100 satisfies the relation: -10 < F2 / F < -0.5; where F2 is the effective focal length of the second lens L2, and F is the effective focal length of the optical lens 100. Specifically, F2 / F can be -9.9, -8, 1.3, 1.35, 1.4, 1.45, 1.5, -0.51, etc. When the optical lens 100 satisfies the above relation, it is beneficial to reduce the deflection angle of light in the second lens L2, and at the same time enable the negative refractive power provided by the second lens L2 to effectively balance the spherical aberration of the optical lens 100, effectively correcting the aberration, thereby achieving good imaging quality. At the same time, it is also beneficial to reasonably configure the central thickness of the second lens L2, thereby shortening the total length of the optical lens 100. In addition, it is also beneficial to expand the field of view angle of the optical lens 100.

[0061] In some embodiments, the optical lens 100 satisfies the relationship: 1 < F4 / F < 2.5; where F4 is the effective focal length of the fourth lens, and F is the effective focal length of the optical lens. Specifically, F4 / F can be 1.1, 1.3, 1.5, 1.7, 1.9, 2.1, 2.3, or 2.49, etc. When the optical lens 100 satisfies the above relationship, the fourth lens L4 provides a part of the positive refractive power for the optical lens 100, which can be used to adjust the overall refractive power of the optical lens 100. The fourth lens L4 and the first lens L1, the second lens L2, and the third lens L3 form a Gauss-like structure, which can balance the distortion generated by the first lens L1, the second lens L2, and the third lens L3, and avoid high-order aberrations caused by too large a refractive index, thereby improving the imaging quality of the optical lens 100.

[0062] In some embodiments, the optical lens 100 satisfies the relationship: 1 < F5 / F < 5; where F5 is the effective focal length of the fifth lens L5, and F is the effective focal length of the optical lens 100. Specifically, F5 / F can be 1.1, 1.5, 2, 2.5, 3, 3.5, 4, or 4.9, etc. When the optical lens 100 satisfies the above relationship, the exit angle of the light after being refracted by the lens group can be reduced, so that the incident angle of the light entering the photosensitive chip on the image side of the optical lens 100 can be reduced, and thus the photosensitive performance of the photosensitive chip can be improved.

[0063] In some embodiments, the optical lens 100 satisfies the relationship: 2.7 < F7 / F < 3.3; where F7 is the effective focal length of the seventh lens, and F is the effective focal length of the optical lens 100. Specifically, F7 / F can be 2.71, 2.8, 2.9, 3, 3.05, 3.15, 3.25, or 3.29, etc. When the optical lens 100 satisfies the above relationship, the refractive power of the seventh lens L7 of the optical lens 100 will not become too strong, so that the angles between the normal lines of the object side surface S13 and the image side surface S14 of the seventh lens L7 and the incident light will not become too large, and it is easy to further suppress the occurrence of high-order aberrations.

[0064] In some embodiments, the optical lens 100 satisfies the relationship: 1 < |F8 / F| < 1.6; where F8 is the effective focal length of the eighth lens, and F is the effective focal length of the optical lens 100. Specifically, |F8 / F| can be 1.01, 1.1, 1.2, 1.3, 1.35, 1.4, 1.5, or 1.59, etc. By restricting the ratio of the focal length of the eighth lens L8 to the focal length of the optical lens 100, it is beneficial to correct the aberrations that are difficult to correct by the sixth lens L6 and the seventh lens L7, so as to balance the aberrations of the optical lens 100 and improve the imaging quality of the optical lens 100.

[0065] In some embodiments, the optical lens 100 satisfies the relational expression: 1.4 < |R22 / R21| < 5.1; where R21 is the radius of curvature of the object side surface S3 of the second lens L2 at the optical axis O, and R22 is the radius of curvature of the image side surface S4 of the second lens L2 at the optical axis O. Specifically, |R4 / R3| can be 1.41, 2, 2.5, 3, 3.5, 4, 4.5, or 5.09, etc. When the optical lens 100 satisfies the above relational expression, by adjusting the radius of curvature of the second lens L2, the spherical aberration and astigmatism of the optical lens 100 can be effectively corrected. At the same time, the sensitivity of the second lens L2 can be reduced, the influence of the field curvature during the focusing process of the optical lens 100 at different object distances can be reduced, and the imaging quality can be improved.

[0066] In some embodiments, the optical lens 100 satisfies the relational expression: -2.1 < R31 / R32 < -0.9; where R31 is the radius of curvature of the object side surface S5 of the third lens L3 at the optical axis O, and R32 is the radius of curvature of the image side surface S6 of the third lens L3 at the optical axis 0. Specifically, R31 / R32 can be -2.099, -2, -1.8, -1.6, -1.4, -1.2, -1.01, or -0.91, etc. When the optical lens 100 satisfies the above relational expression, in cooperation with the concave-convex surface type of the third lens L3, the radius of curvature and surface type of the object side surface S5 and the image side surface S6 of the third lens L3 can be optimized, which is beneficial for the third lens L3 to reasonably cooperate with the negative refractive power of the first lens L1 and the negative refractive power of the second lens L2. Thus, the axial spherical aberration of the entire optical lens 100 is reduced, and at the same time, it is beneficial to correct the optical path direction from the third lens L3 to the fourth lens L4, thereby facilitating the reduction of the generation of optical distortion.

[0067] In some embodiments, the optical lens 100 satisfies the relational expression: 0.3 < |R41 / R42| < 2.3; where R41 is the radius of curvature of the object side surface S7 of the fourth lens L4 at the optical axis O, and R42 is the radius of curvature of the image side surface S8 of the fourth lens L4 at the optical axis O. Specifically, |R41 / R42| can be 0.31, 0.6, 0.9, 1.3, 1.6, 1.9, 2.2, or 2.29, etc. When the optical lens 100 satisfies the above relational expression, it is beneficial to correct the aberration generated by the optical lens 100, so that the refractive power distribution of each lens of the optical lens 100 in the direction perpendicular to the optical axis O is uniform, the distortion and aberration generated by the front lens are greatly corrected, and at the same time, the excessive bending of the fourth lens L4 is avoided, which is easy to form and manufacture.

[0068] In some embodiments, the optical lens 100 satisfies the relation: 2.5 < R61 / R62 < 7; where R61 is the radius of curvature of the object side surface S11 of the sixth lens L6 at the optical axis O, and R62 is the radius of curvature of the image side surface S12 of the sixth lens L6 at the optical axis O. Specifically, R61 / R62 can be 2.51, 3, 3.5, 4, 4.5, 5, 6, 6.9, etc. When the optical lens 100 satisfies the above relation, the radius of curvature of the object side surface S11 of the sixth lens L6 at the optical axis O and the radius of curvature of the image side surface S12 of the sixth lens L6 at the optical axis O can be appropriately configured, so that the shape of the sixth lens L6 is not too curved, thereby while correcting the astigmatism of the optical lens 100, it can also reduce the sensitivity of the performance change of the optical lens 100, which is beneficial to improving the product yield.

[0069] In some embodiments, the optical lens 100 satisfies the relation: 0.2 < R71 / R72 < 0.5; where R71 is the radius of curvature of the object side surface S13 of the seventh lens L7 at the optical axis O, and R72 is the radius of curvature of the image side surface of the seventh lens L7 at the optical axis O. Specifically, R71 / R72 can be 0.21, 0.25, 0.27, 0.3, 0.35, 0.4, 0.45, 0.49, etc. By restricting the ratio of the radius of curvature of the object side surface S13 of the seventh lens L7 to the radius of curvature of the image side surface S14 of the seventh lens L7, the difference between the radius of curvature of the object side surface S13 of the seventh lens L7 and the radius of curvature of the image side surface S14 of the seventh lens L7 becomes more reasonable. When the seventh lens L7 satisfies the above relation, the radius of curvature of the object side surface S13 of the seventh lens L7 is less than the radius of curvature of the image side surface S14 of the seventh lens L7, and the object side surface S13 of the seventh lens L7 is more curved relative to the image side surface S14 of the seventh lens L7, so that the incident light rays maintain a small deflection angle, which is beneficial to correcting the astigmatism generated by the front lens group (i.e., the first lens L1 to the sixth lens L6) and improving the imaging quality of the optical lens 100.

[0070] The surface profiles of the aspherical lenses can be defined by, but not limited to, the following aspherical formula:

[0071]

[0072] where Z is the distance from the corresponding point on the aspherical surface to the plane tangent to the surface vertex, r is the distance from any point on the aspherical surface to the optical axis, c is the curvature of the aspherical vertex, c = 1 / Y, Y is the radius of curvature (i.e., the paraxial curvature c is the reciprocal of the Y radius in Table 1), k is the conic constant, and Ai is the coefficient corresponding to the i-th high-order term in the aspherical surface profile formula.

[0073] The optical lens 100 of this embodiment will be described in detail below in combination with specific parameters.

[0074] First Embodiment

[0075] The structural schematic diagram of the optical lens 100 disclosed in the first embodiment of the present application is as follows Figure 1 As shown, the optical lens 100 includes a first lens L1 with negative refractive power, a second lens L2 with negative refractive power, a third lens L3 with positive refractive power, a fourth lens L4 with positive refractive power, a fifth lens L5 with positive refractive power, an aperture STO, a sixth lens L6 with positive refractive power, a seventh lens L7 with negative refractive power, an eighth lens L8 with negative refractive power, a filter IR and a protective glass CG, which are arranged in sequence from the object side to the image side along the optical axis O.

[0076] Further, the object-side surface S1 of the first lens L1 is convex at the near optical axis O, and the image-side surface S2 of the first lens L1 is concave at the near optical axis O; the object-side surface S3 of the second lens L2 is concave at the near optical axis O, and the image-side surface S4 of the second lens L2 is concave at the near optical axis O; the object-side surface S5 of the third lens L3 is convex at the near optical axis O, and the image-side surface S6 of the third lens L3 is convex at the near optical axis O; the object-side surface S7 of the fourth lens L4 is convex at the near optical axis O, and the image-side surface S8 of the fourth lens L4 is concave at the near optical axis O; The object-side surface S9 of the fifth lens L5 is convex at the near optical axis O, and the image-side surface S10 of the fifth lens L5 is concave at the near optical axis O; the object-side surface S11 of the sixth lens L6 is convex at the near optical axis O, and the image-side surface S12 of the sixth lens L6 is convex at the near optical axis O; the object-side surface S13 of the seventh lens L7 is concave at the near optical axis O, and the image-side surface S14 of the seventh lens L7 is convex at the near optical axis O; the object-side surface S15 of the eighth lens L8 is convex at the near optical axis O, and the image-side surface S16 of the eighth lens L8 is concave at the near optical axis O.

[0077] Specifically, the elements from the object side to the image side along the optical axis O of the optical lens 100 are arranged in sequence from top to bottom in Table 1a. In the same lens, the surface with a smaller surface number is the object side of the lens, and the surface with a larger surface number is the image side of the lens, such as surface numbers 1 and 2 correspond to the object side surface S1 and image side surface S2 of the first lens L1, respectively. The Y radius in Table 1a is the radius of curvature of the object side surface or image side surface of the corresponding surface number at 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 surface of the lens to the next surface on the optical axis O. The value of the aperture STO in the "Thickness" parameter column is the distance from the aperture 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 the value is negative, it indicates that the aperture STO is set on the image side of the vertex of the next surface. If the thickness of the aperture STO is a positive value, the aperture STO is on the object side of the vertex of the next surface. It can be understood that the units of the Y radius, thickness and effective focal length in Table 1a are all mm. And the reference wavelength of the refractive index and Abbe number of each lens in Table 1a is 587.56nm, and the reference wavelength of the effective focal length is 546nm.

[0078] In the first embodiment, the object-side surface S9 and the image-side surface S10 of the fifth lens L5 are both aspherical surfaces, and the object-side surface S15 and the image-side surface S16 of the eighth lens L8 are both aspherical surfaces. Table 1b shows the cone constant k, and the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical mirror surface in the first embodiment.

[0079] Table 1a

[0080]

[0081]

[0082] Table 1b

[0083]

[0084] See also Figure 2 In (A), Figure 2 (A) in FIG. 1 shows the longitudinal spherical aberration diagram of the optical lens 100 in the first embodiment at wavelengths of 656 nm, 588 nm, 546 nm, 486 nm, 436 nm and 410 nm, respectively. The horizontal axis along the X-axis direction represents the focus offset in mm, and the vertical axis along the Y-axis direction represents the normalized field of view. Figure 2 It can be seen from (A) that the spherical aberration value of the optical lens 100 in the first embodiment is better, which means that the imaging quality of the optical lens 100 in this embodiment is better.

[0085] See also Figure 2 In (B), Figure 2 (B) in the figure shows the astigmatism diagram of the optical lens 100 in the first embodiment at a wavelength of 546 nm. The horizontal axis along the X-axis direction represents the focus offset in mm, and the vertical axis along the Y-axis direction represents the field angle in degrees. T in the astigmatism diagram represents the curvature of the imaging surface IMG in the sub-arc direction, and S represents the curvature of the imaging surface IMG in the sagittal direction. Figure 2 It can be seen from (B) in FIG. 1 that at this wavelength, the astigmatism of the optical lens 100 is well compensated.

[0086] See also Figure 2 (C) in Figure 2 (C) in FIG. 1 shows a distortion curve of the optical lens 100 in the first embodiment at a wavelength of 546 nm. The horizontal axis along the X-axis direction represents the distortion, and the vertical axis along the Y-axis direction represents the field of view angle, in degrees. Figure 2 As can be seen from (C) in FIG. 1 , at this wavelength, the distortion of the optical lens 100 is well corrected.

[0087] Second embodiment

[0088] The structural schematic diagram of the optical lens 100 disclosed in the second embodiment of the present application is as follows Figure 3 As shown, the optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, an aperture STO, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter IR and a protective glass CG, which are arranged in sequence from the object side to the image side along the optical axis O.

[0089] Furthermore, in the second embodiment, the refractive power and the surface shape of each lens are consistent with the refractive power and the surface shape of each lens in the first embodiment.

[0090] The other parameters in the second embodiment are given in the following Table 2a, and the definition of each parameter can be obtained from the description of the above embodiment, which will not be repeated here.

[0091] Table 2a

[0092]

[0093] Table 2b

[0094]

[0095] See also Figure 4 ,Depend on Figure 4It can be seen from the longitudinal spherical aberration diagram (A), astigmatism diagram (B) and distortion curve diagram (C) in the second embodiment that the longitudinal spherical aberration, astigmatism and distortion of the optical lens 100 are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. Figure 4 (A) Figure 4 Middle (B) and Figure 4 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment. Figure 2 In (A), Figure 2 In (B), Figure 2 The contents described in (C) will not be repeated here.

[0096] Third embodiment

[0097] The structural schematic diagram of the optical lens 100 disclosed in the third embodiment of the present application is as follows: Figure 5 As shown, the optical lens 100 includes a first lens L1 with negative refractive power, a second lens L2 with negative refractive power, a third lens L3 with positive refractive power, an aperture STO, a fourth lens L4 with positive refractive power, a fifth lens L5 with negative refractive power, a sixth lens L6 with negative refractive power, a seventh lens L7 with positive refractive power, an eighth lens L8 with negative refractive power, a filter IR and a protective glass CG, which are arranged in sequence from the object side to the image side along the optical axis O.

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

[0099] Other parameters in the third embodiment are given in the following Table 3a, and the definition of each parameter can be obtained from the description of the above embodiments, which will not be repeated here.

[0100] Table 3a

[0101]

[0102]

[0103] Table 3b

[0104]

[0105] See also Figure 6 ,Depend on Figure 6 It can be seen from the longitudinal spherical aberration diagram (A), astigmatism diagram (B) and distortion curve diagram (C) in the third embodiment that the longitudinal spherical aberration, astigmatism and distortion of the optical lens 100 are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. Figure 6 (A) Figure 6 Middle (B) and Figure 6 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment. Figure 2 In (A), Figure 2 In (B), Figure 2 The contents described in (C) will not be repeated here.

[0106] Fourth embodiment

[0107] The structural schematic diagram of the optical lens 100 disclosed in the fourth embodiment of the present application is as follows: Figure 7 As shown, the optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter IR and a protective glass CG, which are arranged in sequence from the object side to the image side along the optical axis O.

[0108] Furthermore, in the fourth embodiment, the refractive power and the surface shape of each lens are consistent with the refractive power and the surface shape of each lens in the third embodiment.

[0109] The other parameters in the fourth embodiment are given in the following Table 4a, and the definition of each parameter can be obtained from the description of the above embodiments, which will not be repeated here.

[0110] Table 4a

[0111]

[0112] Table 4b

[0113]

[0114] See also Figure 8 ,Depend on Figure 8It can be seen from the longitudinal spherical aberration diagram (A), astigmatism diagram (B) and distortion curve diagram (C) in the fourth embodiment that the longitudinal spherical aberration, astigmatism and distortion of the optical lens 100 are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. Figure 8 (A) Figure 8 Middle (B) and Figure 8 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment. Figure 2 In (A), Figure 2 In (B), Figure 2 The contents described in (C) will not be repeated here.

[0115] Fifth embodiment

[0116] The structural schematic diagram of the optical lens 100 disclosed in the fifth embodiment of the present application is as follows Fig. 9 As shown, the optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, an aperture STO, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter IR and a protective glass CG, which are arranged in sequence from the object side to the image side along the optical axis O.

[0117] Furthermore, in the fifth embodiment, the refractive power and the surface shape of each lens are consistent with the refractive power and the surface shape of each lens in the first embodiment.

[0118] The other parameters in the fifth embodiment are given in the following Table 5a, and the definition of each parameter can be obtained from the description of the above embodiments, which will not be repeated here.

[0119] Table 5a

[0120]

[0121]

[0122] Table 5b

[0123]

[0124] See also Fig.10 ,Depend on Fig.10 It can be seen from the longitudinal spherical aberration diagram (A), astigmatism diagram (B) and distortion curve diagram (C) in the fifth embodiment that the longitudinal spherical aberration, astigmatism and distortion of the optical lens 100 are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. Fig.10 (A) Fig.10 Middle (B) and Fig.10 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment. Figure 2In (A), Figure 2 In (B), Figure 2 The contents described in (C) will not be repeated here.

[0125] Sixth embodiment

[0126] The structural schematic diagram of the optical lens 100 disclosed in the sixth embodiment of the present application is as follows Fig.11 As shown, the optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, an aperture STO, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter IR and a protective glass CG, which are arranged in sequence from the object side to the image side along the optical axis O.

[0127] Furthermore, in the sixth embodiment, the refractive power and the surface shape of each lens are consistent with the refractive power and the surface shape of each lens in the first embodiment.

[0128] The other parameters in the sixth embodiment are given in the following Table 6a, and the definition of each parameter can be obtained from the description of the above embodiments, which will not be repeated here.

[0129] Table 6a

[0130]

[0131]

[0132] Table 6b

[0133]

[0134] See also Fig.12 ,Depend on Fig.12 It can be seen from the longitudinal spherical aberration diagram (A), astigmatism diagram (B) and distortion curve diagram (C) in the sixth embodiment that the longitudinal spherical aberration, astigmatism and distortion of the optical lens 100 are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. Fig.12 (A) Fig.12 Middle (B) and Fig.12 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment. Figure 2 In (A), Figure 2 In (B), Figure 2 The contents described in (C) will not be repeated here.

[0135] Seventh embodiment

[0136] The structural schematic diagram of the optical lens 100 disclosed in the seventh embodiment of the present application is as follows Fig.13As shown, the optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, an aperture STO, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter IR and a protective glass CG, which are arranged in sequence from the object side to the image side along the optical axis O.

[0137] Furthermore, in the seventh embodiment, the refractive power and the surface shape of each lens are consistent with the refractive power and the surface shape of each lens in the first embodiment.

[0138] The other parameters in the seventh embodiment are given in the following Table 7a, and the definition of each parameter can be obtained from the description of the above embodiments, which will not be repeated here.

[0139] Table 7a

[0140]

[0141]

[0142] Table 7b

[0143]

[0144] See also Fig.14 ,Depend on Fig.14 It can be seen from the longitudinal spherical aberration diagram (A), astigmatism diagram (B) and distortion curve diagram (C) in the seventh embodiment that the longitudinal spherical aberration, astigmatism and distortion of the optical lens 100 are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. Fig.14 (A) Fig.14 Middle (B) and Fig.14 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment. Figure 2 In (A), Figure 2 In (B), Figure 2 The contents described in (C) will not be repeated here.

[0145] Eighth embodiment

[0146] The structural schematic diagram of the optical lens 100 disclosed in the eighth embodiment of the present application is as follows Fig.15 As shown, the optical lens 100 includes a first lens L1 with negative refractive power, a second lens L2 with negative refractive power, a third lens L3 with positive refractive power, a fourth lens L4 with positive refractive power, a fifth lens L5 with positive refractive power, an aperture STO, a sixth lens L6 with positive refractive power, a seventh lens L7 with negative refractive power, an eighth lens L8, a filter IR and a protective glass CG, which are arranged in sequence along the optical axis O from the object side to the image side.

[0147] Furthermore, in the eighth embodiment, the surface shape of each lens is consistent with the surface shape of each lens in the first embodiment.

[0148] The other parameters in the eighth embodiment are given in the following Table 8a, and the definition of each parameter can be obtained from the description of the above-mentioned embodiment and will not be repeated here.

[0149] Table 8a

[0150]

[0151] Table 8b

[0152]

[0153]

[0154] See also Fig.16 ,Depend on Fig.16 It can be seen from the longitudinal spherical aberration diagram (A), astigmatism diagram (B) and distortion curve diagram (C) in the eighth embodiment that the longitudinal spherical aberration, astigmatism and distortion of the optical lens 100 are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. Fig.16 (A) Fig.16 Middle (B) and Fig.16 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment. Figure 2 In (A), Figure 2 In (B), Figure 2 The contents described in (C) will not be repeated here.

[0155] Table 9 shows the values ​​of multiple relational expressions in the optical lens 100 according to the first to eighth embodiments.

[0156] Table 9

[0157]

[0158]

[0159] See also Fig.17 The embodiment of the present application also discloses a camera module 200, which includes a photosensitive chip 201 and the above-mentioned optical lens 100, and the photosensitive chip 201 is arranged on the image side of the optical lens 100. The optical lens 100 is used to receive the light signal of the subject and project it to the photosensitive chip 201, and the photosensitive chip 201 is used to convert the light signal corresponding to the subject into an image signal, which will not be described in detail here. The camera module 200 with the optical lens 100 can realize the miniaturization design of the optical lens 100, and at the same time make the optical lens 100 have the characteristics of a large field of view, thereby improving the imaging quality of the optical lens 100.

[0160] See also Fig.18 The embodiment of the present application also discloses a terminal device 300, which includes a housing 301 and the camera module 200, and the camera module 200 is arranged in the housing 301. The terminal device 300 may be, but is not limited to, a mobile phone, a tablet computer, a laptop computer, a smart watch, a monitor, etc. It can be understood that the electronic device 300 having the camera module 200 also has all the technical effects of the optical lens 100, that is, it can realize the miniaturization design of the optical lens 100, and at the same time, the optical lens 100 has the characteristics of a large field of view, thereby improving the imaging quality of the optical lens 100.

[0161] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application and are not intended to limit it. Although the present application has been described in detail with reference to the preferred embodiments, a person of ordinary skill in the art should understand that the technical solution of the present application may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present application.

Claims

1. An optical lens, characterized in that: There are a total of eight lenses with refractive power, which successively include, from the object side to the image side along the optical axis: The first lens has negative refractive power. The object side surface of the first lens is convex near the optical axis, and the image side surface of the first lens is concave near the optical axis. The second lens has negative refractive power. The object side surface of the second lens is concave near the optical axis. The third lens has positive refractive power. Both the object side surface and the image side surface of the third lens are convex near the optical axis. The fourth lens has positive refractive power. The object side surface of the fourth lens is convex near the optical axis. The fifth lens has refractive power. The sixth lens has refractive power. The object side surface of the sixth lens is convex near the optical axis. The seventh lens has refractive power. The image side surface of the seventh lens is convex near the optical axis. The eighth lens has refractive power. The image side surface of the eighth lens is concave near the optical axis. The optical lens satisfies the following relationships: 105° ≤ FOV ≤ 115°; where FOV is the maximum field of view angle of the optical lens.

2. The optical lens according to claim 1, wherein: The optical lens satisfies the following relationships: 1.2 < SD11 / IMGH < 1.6; and / or, 39mm < TTL*IMGH / F < 43mm; and / or, 6.2 < TTL / IMGH < 7; where SD11 is half of the maximum effective aperture of the object side surface of the first lens, IMGH is the radius of the maximum effective imaging circle on the imaging surface of the optical lens, TTL is the distance from the object side surface of the first lens to the imaging surface of the optical lens on the optical axis, and F is the effective focal length of the optical lens.

3. The optical lens according to claim 1, wherein: The optical lens satisfies the following relationships: 4.2 < TTL / SD11 < 5.6; and / or, 3 < R11 / F < 15; and / or, 1.3 < F3 / F < 2.3; where TTL is the distance from the object side surface of the first lens to the imaging surface of the optical lens on the optical axis, SD11 is half of the maximum effective aperture of the object side surface of the first lens, R11 is the curvature radius of the object side surface of the first lens on the optical axis, F is the effective focal length of the optical lens, and F3 is the effective focal length of the third lens.

4. The optical lens according to claim 1, wherein: Both the object side surface and the image side surface of the fifth lens are aspherical. The optical lens satisfies the following relationships: 1 < |F6 / F| < 1.6; and / or, 3 < R11 / R12 < 13; and / or, 1.9 < R52 / R51 < 30; where F6 is the effective focal length of the sixth lens, F is the effective focal length of the optical lens, R11 is the curvature radius of the object side surface of the first lens on the optical axis, R12 is the curvature radius of the image side surface of the first lens on the optical axis, R52 is the curvature radius of the image side surface of the fifth lens on the optical axis, and R51 is the curvature radius of the object side surface of the fifth lens on the optical axis.

5. The optical lens according to claim 1, wherein: Both the object side surface and the image side surface of the eighth lens are aspherical. The optical lens satisfies the following relationships: 0 < |R81 / R82| < 35; and / or, 1.4 < ∑CT / ∑AT < 2.1; and / or, 1.2 < SD11 / SD82 < 1.81; Wherein, R81 is the radius of curvature of the object side of the eighth lens on the optical axis, R82 is the radius of curvature of the image side of the eighth lens on the optical axis, ∑CT is the sum of the thicknesses of the first lens to the eighth lens on the optical axis respectively, ∑AT is the sum of the gaps of the first lens to the eighth lens on the optical axis, SD11 is half of the maximum effective aperture of the object side of the first lens, and SD82 is half of the maximum effective aperture of the image side of the eighth lens.

6. The optical lens according to claim 1, wherein: The sixth lens and the seventh lens are cemented lenses, and the optical lens satisfies the following relational expressions: -15 < F1 / CT1 < -5; and / or, 0 < F / F67 < 0.3; and / or, 0.12 < (CT6 + CT7) / TTL < 0.2; Wherein, F1 is the effective focal length of the first lens, CT1 is the thickness of the first lens on the optical axis, F is the effective focal length of the optical lens, F67 is the combined effective focal length of the sixth lens and the seventh lens, CT6 is the thickness of the sixth lens on the optical axis, CT7 is the thickness of the seventh lens on the optical axis, and TTL is the distance on the optical axis from the object side of the first lens to the imaging surface of the optical lens.

7. The optical lens according to claim 1, wherein: The optical lens satisfies the following conditional expressions: 0.3mm -1 <|(VD6-VD7) / F67|<2mm -1 and / or, 1 < SD12 / SD21 < 1.2; and / or, 0 < CT56 / (CT5 + CT6) < 0.75; Wherein, VD6 is the Abbe number of the material used for the sixth lens, VD7 is the Abbe number of the material used for the seventh lens, F67 is the combined effective focal length of the sixth lens and the seventh lens, SD12 is half of the maximum effective aperture of the image side of the first lens, SD21 is half of the maximum effective aperture of the object side of the second lens, CT56 is the distance on the optical axis between the image side of the fifth lens and the object side of the sixth lens, CT5 is the thickness of the fifth lens on the optical axis, and CT6 is the thickness of the sixth lens on the optical axis.

8. The optical lens according to claim 1, wherein: The optical lens satisfies the following conditional expressions: 0 < CT78 / CT8 < 1.7; and / or, 64° < FOV / FNO < 71°; and / or, 5.9 < TTL / F < 6.3; and / or, 1 < F / IMGH < 1.15; Wherein, CT78 is the distance on the optical axis between the image side of the seventh lens and the object side of the eighth lens, CT8 is the thickness of the eighth lens on the optical axis, FNO is the aperture number of the optical lens, TTL is the distance on the optical axis from the object side of the first lens to the imaging surface of the optical lens, F is the effective focal length of the optical lens, and IMGH is the radius of the largest effective imaging circle on the imaging surface of the optical lens.

9. A camera module, characterized in that: The imaging module includes an image sensor chip and an optical lens according to any one of claims 1-8, and the image sensor chip is disposed on the image side of the optical lens.

10. A terminal device, characterized in that: It includes a housing and an imaging module according to claim 9, and the imaging module is disposed in the housing.

Images