Optical lens, camera module and terminal equipment

Abstract

The embodiment of the invention provides an optical lens, a camera module and terminal equipment, and the optical lens comprises six lenses which sequentially comprise the first lens with negative refractive power from an object side to an image side along an optical axis, the object side surface of the first lens is a convex surface near the optical axis, and the image side surface of the first lens is a concave surface near the optical axis; a second lens element with refractive power; a third lens element with positive refractive power; a fourth lens element with positive refractive power, the image-side surface of the fourth lens element being convex in a paraxial region; a fifth lens element with positive refractive power, the object-side surface of the fifth lens element being convex in a paraxial region thereof, and the image-side surface of the fifth lens element being convex in a paraxial region thereof; the sixth lens element with negative refractive power has an object-side surface being concave in a paraxial region and an image-side surface being convex in a paraxial region. The optical lens satisfies the following relational expressions: FOV is not less than 110 degrees and not more than 125 degrees, and FNO is not less than 2 and not more than 2.4. The optical lens provided by the invention meets the requirements of a large field of view and a relatively high light incoming amount, and facilitates the improvement of the imaging quality.

Description

Technical Field

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

[0002] As a core sensing component of the autonomous driving system, the performance requirements of vehicle-mounted optical lenses are continuously escalating with the development of technology. Currently, vehicle-mounted optical lenses have limitations in the field of view coverage, and it is difficult to ensure sufficient light intake in low-illumination environments, resulting in a decline in imaging quality. Therefore, developing optical lenses with both a large field of view and a high light intake has become an urgent need in the industry. Summary of the Invention

[0003] Embodiments of this application provide an optical lens, an imaging module, and a terminal device to meet the requirements of a large field of view and a high light intake, which is conducive to improving the imaging quality of the optical lens.

[0004] In a first aspect, embodiments of this application provide an optical lens, including six lenses with refractive power. Along the optical axis, from the object side to the image side, it successively includes: a first lens with 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; a second lens with refractive power; a third lens with positive refractive power; a fourth lens with positive refractive power, the image side surface of the fourth lens is convex near the optical axis; a fifth lens with 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 convex near the optical axis; a sixth lens with negative refractive power, the object side surface of the sixth lens is concave near the optical axis, and the image side surface of the sixth lens is convex near the optical axis. This optical lens satisfies the following relationship: 110° ≤ FOV ≤ 125°, 2 ≤ FNO ≤ 2.4; where FOV is the maximum field of view angle of the optical lens, and FNO is the f-number of the optical lens.

[0005] In this embodiment, the first lens with negative refractive power is combined with an object side surface that is convex near the optical axis and an image side surface that is concave near the optical axis, which is beneficial to increasing the incident angle of light and expanding the field of view angle of the optical lens; at the same time, it is also beneficial to reducing the aperture of the side of the optical lens far from the imaging surface (hereinafter referred to as the head); the second lens with refractive power can deflect the light projected by the first lens; the third lens with positive refractive power can converge the light projected by the second lens and make the light smoothly enter the fourth lens; the fourth lens with positive refractive power, combined with an image side surface that is convex near the optical axis, can converge the light projected by the third lens, which is beneficial to reducing the overall optical length of the optical lens and realizing the miniaturization of the optical lens; the fifth lens with positive refractive power, combined with an object side surface and an image side surface that are both convex near the optical axis, can further converge the light projected by the fourth lens, which is beneficial to reducing the overall optical length of the optical lens and realizing the miniaturization of the optical lens; the sixth lens with negative refractive power, combined with an object side surface that is concave near the optical axis and an image side surface that is convex near the optical axis, is beneficial to eliminating the chromatic aberration of the optical lens, thereby improving the imaging quality of the optical lens.

[0006] In this embodiment, by making the maximum field of view angle FOV of the optical lens satisfy the above relationship, the optical lens can have a larger field of view angle, which is beneficial for the optical lens to obtain information of the object to be photographed within a larger angle, and enables the optical lens to meet the requirements of a large field of view; by making the f-number FNO of the optical lens satisfy the above relationship, it can be ensured that the optical lens has a large light input amount, which can improve the exposure efficiency of the optical lens under low-light conditions (such as dusk, night, etc.), and at the same time ensure good resolution of the optical lens and improve the imaging quality of the optical lens. Therefore, the solution of this embodiment can not only meet the requirements of a large field of view but also ensure sufficient light input amount under low-light conditions, thereby being beneficial to improving the imaging quality of the optical lens.

[0007] In one implementation of the first aspect, the optical lens satisfies one or more of the following relationships: 0.79 ≤ ImgH / F ≤ 1, 45° ≤ FOV / FNO ≤ 60°, 4.5 ≤ TTL / ImgH ≤ 8.1. Where ImgH is half of the image height corresponding to the maximum field of view angle of the optical lens, F is the effective focal length of the optical lens, FOV is the maximum field of view angle of the optical lens, FNO is the aperture number of the optical lens, and TTL is the total optical length of the optical lens. In this implementation, by limiting ImgH / F within the above range, it is beneficial for the optical lens to have a large depth of field while meeting the requirements of high imaging clarity. At the same time, it is also beneficial to expand the field of view angle of the optical system to achieve large-range shooting. By limiting FOV / FNO within the above range, the optical lens can achieve a balance between the field of view range and the light input, optimize the depth of field, improve the optical performance in low light, and reduce distortion. By limiting TTL / ImgH within the above range, the optical lens can meet the requirements of high pixels and miniaturization.

[0008] In one implementation of the first aspect, the optical lens satisfies one or more of the following relationships: 1.5 ≤ R1 / F ≤ 5, 0.3 ≤ |R5 / R6| ≤ 3.2, 0.3 ≤ (R7 - R8) / (R7 + R8) ≤ 1.1. Where R1 is the curvature radius of the object side of the first lens at the optical axis, R5 is the curvature radius of the object side of the third lens at the optical axis, R6 is the curvature radius of the image side of the third lens at the optical axis, R7 is the curvature radius of the object side of the fourth lens at the optical axis, R8 is the curvature radius of the image side of the fourth lens at the optical axis, and F is the effective focal length of the optical lens. In this implementation, by limiting R1 / F within the above range, the field of view angle can be effectively expanded to receive large-field-of-view light, which is beneficial for achieving a large aperture. By limiting |R5 / R6| within the above range, the refractive power of the third lens can be evenly configured, which is beneficial for reducing the field curvature and astigmatism of the optical lens and reducing distortion. By limiting (R7 - R8) / (R7 + R8) within the above range, it is beneficial to reasonably control the curvature radii of the object side and the image side of the fourth lens, and then effectively control the shape of the fourth lens, so that the fourth lens refracts the incident light more gently to avoid increasing aberration. Below the lower limit of the relationship, the curvature radii of the object side and the image side of the fourth lens at the optical axis differ too much, and the object side or the image side of the fourth lens is too flat, resulting in a weakened refraction effect of the fourth lens on the incident light, which is not conducive to controlling the total optical length of the optical lens. Exceeding the upper limit of the relationship, the curvature radii of the object side and the image side of the fourth lens at the optical axis differ too little, and the bending degree of the fourth lens on the light is too large, which is likely to cause reflection and ghosting with other lenses.

[0009] In an implementation of the first aspect, the optical lens satisfies one or more of the following relational expressions: 5 ≤ |F2 / F| ≤ 17, 2 ≤ F3 / F ≤ 22, 0.9 ≤ F5 / F ≤ 1.5, 2.3 ≤ F56 / F ≤ 3.6. Wherein, F2 is the focal length of the second lens, F3 is the focal length of the third lens, F5 is the focal length of the fifth lens, F56 is the combined focal length of the fifth lens and the sixth lens, and F is the effective focal length of the optical lens. In this implementation, by limiting |F2 / F| within the above range, it is beneficial to smoothly transition light and reduce the sensitivity of system tolerances (such as decentration tolerance and tilt tolerance); by limiting F3 / F within the above range, excessive spherical aberration introduced by the third lens can be avoided, improving the resolution ability of the optical lens; by limiting F5 / F within the above range, it is beneficial to reduce the principal ray angle of the system, ensuring that the angle of the principal ray from the incident light to the photosensitive chip is less than the maximum principal ray angle of the photosensitive chip, and avoiding color cast in the image; by limiting F56 / F within the above range, excessive spherical aberration introduced by the fifth lens and the sixth lens can be avoided, improving the resolution ability of the optical lens.

[0010] In an implementation of the first aspect, the optical lens satisfies one or more of the following relational expressions: 0.65 ≤ CT4 / ET4 ≤ 1.3, 2 ≤ CT5 / ET5 ≤ 4.65, 0.5 ≤ CT6 / ET6 ≤ 0.85. Wherein, CT4 is the thickness of the fourth lens on the optical axis, CT5 is the thickness of the fifth lens on the optical axis, CT6 is the thickness of the sixth lens on the optical axis, ET4 is the distance on the optical axis from the maximum effective aperture of the object side of the fourth lens to the maximum effective aperture of the image side of the fourth lens, ET5 is the distance on the optical axis from the maximum effective aperture of the object side of the fifth lens to the maximum effective aperture of the image side of the fifth lens, and ET6 is the distance on the optical axis from the maximum effective aperture of the object side of the sixth lens to the maximum effective aperture of the image side of the sixth lens. In this implementation, by limiting CT4 / ET4 within the above range, the ratio of the central thickness to the edge thickness of the fourth lens can be reasonably controlled, so that the overall thickness of the fourth lens is reasonable, which is beneficial to realizing the miniaturized design of the optical lens; by limiting CT5 / ET5 within the above range, the ratio of the central thickness to the edge thickness of the fifth lens can be reasonably controlled, so that the overall thickness of the fifth lens is reasonable, which is beneficial to realizing the miniaturized design of the optical lens; by limiting CT6 / ET6 within the above range, the ratio of the central thickness to the edge thickness of the sixth lens can be reasonably controlled, so that the overall thickness of the sixth lens is reasonable, which is beneficial to realizing the miniaturized design of the optical lens.

[0011] In one implementation of the first aspect, the optical lens satisfies one or more of the following relationships: 0.05 ≤ SAGS1 / CT1 ≤ 0.65, 0.55 ≤ SAGS2 / CT1 ≤ 1.9, -5 ≤ F1 / CT1 ≤ -2. Wherein, SAGS1 is the sag of the edge of the optical effective diameter of the object side of the first lens, CT1 is the thickness of the first lens on the optical axis, SAGS2 is the sag of the edge of the optical effective diameter of the image side of the first lens, and F1 is the focal length of the first lens. In this implementation, by limiting SAGS1 / CT1 within the above range, it is beneficial to control the curvature of the object side of the first lens, thereby controlling the aperture of the first lens, which is beneficial to the processing of the first lens; when the ratio of SAGS1 to CT1 exceeds the upper limit of the above relationship, the object side of the first lens is too curved, which is not conducive to the surface shape control of the first lens and increases the risk of ghosting; when the ratio of SAGS1 to CT1 is lower than the lower limit of the above relationship, the first lens is too thick, which is not conducive to the miniaturization of the optical lens. By limiting SAGS2 / CT1 within the above range, it is beneficial to control the curvature of the image side of the first lens, thereby controlling the aperture of the first lens, which is beneficial to the processing of the first lens; when the ratio of SAGS2 to CT1 exceeds the upper limit of the above relationship, the image side of the first lens is too curved, which is not conducive to the surface shape control of the first lens and increases the risk of ghosting; when the ratio of SAGS2 to CT1 is lower than the lower limit of the above relationship, the first lens is too thick, which is not conducive to the miniaturization of the optical lens. By limiting F1 / CT1 within the above range, the incident light rays entering the optical lens at large angles can enter smoothly, thereby expanding the field of view angle range of the optical lens and enabling the optical lens to meet the requirements of a large field of view.

[0012] In one implementation of the first aspect, the optical lens satisfies one or more of the following relationships: 1 ≤ SD1 / ImgH ≤ 1.65, 1.3 ≤ SD1 / SD12 ≤ 1.8. Wherein, SD1 is half of the maximum effective aperture of the object side of the first lens, SD12 is half of the maximum effective aperture of the image side of the sixth lens, and ImgH is half of the image height corresponding to the maximum field of view angle of the optical lens. In this implementation, by limiting SD1 / ImgH within the above range, the optical lens can meet the requirements of adapting to a large-sized imaging surface while taking into account the miniaturization design of the head of the optical lens. By limiting SD1 / SD12 within the above range, the aperture of the object side of the first lens can be made larger, which can better control the incident angle of light and reduce spherical aberration; while the smaller image-side aperture of the sixth lens can suppress off-axis aberrations (such as coma and astigmatism), thereby achieving aberration balance in the optical system; in addition, it can also make the structure of the optical lens compact, which is beneficial to the miniaturization of the optical lens.

[0013] In one implementation of the first aspect, the optical lens satisfies one or more of the following relationships: -3 ≤ F123 / F456 ≤ -1, 9.7 ≤ TTL / CT5 ≤ 12.3, 0.7 ≤ CT5 / CT6 ≤ 1.7. When the optical lens satisfies -3 ≤ F123 / F456 ≤ -1, the optical lens further includes a diaphragm located between the third lens and the fourth lens. Here, F123 is the combined focal length of the first lens, the second lens, and the third lens, F456 is the combined focal length of the fourth lens, the fifth lens, and the sixth lens, CT5 is the thickness of the fifth lens on the optical axis, CT6 is the thickness of the sixth lens on the optical axis, and TTL is the overall optical length of the optical lens. In this implementation, by limiting the ratio of the combined focal length (F123) of the object-side lenses of the diaphragm to the combined focal length (F456) of the image-side lenses of the diaphragm within the above range, it is beneficial to achieve the effects of a large aperture and a large target surface in the optical system; at the same time, the light can fill the entire diaphragm, which is beneficial to the aberration balance of the optical system. By limiting TTL / CT5 within the above range, the central thickness of the fifth lens can be made larger, which can ensure that the angle of light exiting the fifth lens L5 is smaller, the optical output is gentle, which is beneficial to reducing the eccentricity tolerance and improving the mass production yield of the optical lens. By limiting CT5 / CT6 within the above range, the total thickness of the fifth lens and the sixth lens can be reduced, which is beneficial to the miniaturized design of the optical lens.

[0014] In a second aspect, an embodiment of the present application provides an imaging module, including a photosensitive chip and any one of the above optical lenses, and the photosensitive lens is disposed on the image side of the optical lens. The imaging module having any one of the above optical lenses can simultaneously meet the requirements of a large field of view and a high light input, which is beneficial to improving the imaging quality.

[0015] In a third aspect, an embodiment of the present application provides a terminal device, including a main body and the imaging module provided in the second aspect, and the imaging module is disposed on the main body. The terminal device having the imaging module can simultaneously meet the requirements of a large field of view and a high light input, which is beneficial to improving the imaging quality and ensuring a good user experience of the terminal device. Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of a terminal device in an embodiment of the present application;

[0017] Figure 2 is a schematic structural diagram of the imaging module in the first embodiment;

[0018] Figure 3 is Figure 2 the schematic structural diagram of the optical lens in;

[0019] Figure 4 is Figure 3Longitudinal spherical aberration curve graph, astigmatism curve graph, and distortion curve graph of the optical lens in

[0020] Figure 5 is a schematic structural diagram of the optical lens in the second embodiment;

[0021] Figure 6 is Figure 5 Longitudinal spherical aberration curve graph, astigmatism curve graph, and distortion curve graph of the optical lens in

[0022] Figure 7 is a schematic structural diagram of the optical lens in the third embodiment;

[0023] Figure 8 is Figure 7 Longitudinal spherical aberration curve graph, astigmatism curve graph, and distortion curve graph of the optical lens in

[0024] Figure 9 is a schematic structural diagram of the optical lens in the fourth embodiment;

[0025] Figure 10 is Figure 9 Longitudinal spherical aberration curve graph, astigmatism curve graph, and distortion curve graph of the optical lens in

[0026] Figure 11 is a schematic structural diagram of the optical lens in the fifth embodiment;

[0027] Figure 12 is Figure 11 Longitudinal spherical aberration curve graph, astigmatism curve graph, and distortion curve graph of the optical lens in

[0028] Figure 13 is a schematic structural diagram of the optical lens in the sixth embodiment;

[0029] Figure 14 is Figure 13 Longitudinal spherical aberration curve graph, astigmatism curve graph, and distortion curve graph of the optical lens in

[0030] Figure 15 is a schematic structural diagram of the optical lens in the seventh embodiment;

[0031] Figure 16 is Figure 15 Longitudinal spherical aberration curve graph, astigmatism curve graph, and distortion curve graph of the optical lens in. Detailed implementation manners

[0032] For ease of understanding, the following first explains and describes the English abbreviations and relevant technical terms involved in the embodiments of the present application.

[0033] Refractive power, a quantitative index of the converging or diverging ability of parallel light rays after passing through a lens or an optical system, is also called refractive force or optical power.

[0034] A lens or a lens group with positive refractive power has a positive focal length and has the effect of converging light rays.

[0035] A lens or a lens group with negative refractive power has a negative focal length and has the effect of diverging light rays.

[0036] Focal Length, also known as focal length, is a measure of the convergence or divergence of light in an optical system. It refers to the perpendicular distance from the optical center of a lens or a lens group to the focal plane when an infinitely distant scene forms a clear image on the focal plane through the lens or the lens group. From a practical perspective, it can be understood as the distance from the center of the lens to the plane when the object is at infinity. For a fixed-focus lens, the position of its optical center is fixed; for an optical lens, the change of the optical center of the lens brings about the change of the focal length of the lens.

[0037] Object side: Taking the lens as the boundary, the side where the object to be photographed is located is the object side, and the surface of the lens close to the object side is called the object side surface.

[0038] Image side: Taking the lens as the boundary, the side where the image of the object to be photographed is located is the image side, and the surface of the lens close to the image side is called the image side surface.

[0039] Diaphragm is a device used to control the amount of light passing through the lens and entering the photosensitive surface inside the camera body. It is usually inside the lens.

[0040] Aperture number, also known as F-number (FNO), is the relative value obtained by dividing the focal length of the lens by the diameter of the entrance pupil of the lens (the reciprocal of the relative aperture). The smaller the aperture number, the more light enters in the same unit of time. The larger the aperture number, the smaller the depth of field, and the background content of the photo will be blurred, similar to the effect of an optical lens.

[0041] Total Track Length (TTL) refers to the total length on the optical axis from the surface of the lens closest to the object side to the imaging surface.

[0042] Imaging surface is located on the image side of all the lenses in the optical lens and is the plane where the light forms an image after passing through each lens in the optical lens in turn.

[0043] Optical axis is an axis that perpendicularly passes through the center of the lens. The optical axis of the lens is the axis that passes through the centers of each lens of the lens.

[0044] Tangential direction (T): The tangential direction is located in the tangential plane, which is the plane formed by the chief ray of an off-axis object point and the optical axis of the optical system.

[0045] Sagittal direction (S), the sagittal direction is located within the sagittal plane. The sagittal plane is a plane that contains the chief ray and is orthogonal to the meridional plane. The sagittal plane intersects the optical axis at the entrance pupil position and is perpendicular to the meridional plane.

[0046] Focus, the convergence point after parallel light rays are refracted by a lens or a lens group.

[0047] Abbe number, that is, the dispersion coefficient, is the ratio of the difference in refractive indices of an optical material at different wavelengths, representing the degree of material dispersion.

[0048] Chief Ray Angle (CRA), is a key parameter for measuring the maximum angle at which light rays are incident on the sensor pixels, and can also be called the chief ray angle.

[0049] Field of View (FOV), in an optical instrument, with the lens of the optical instrument as the vertex, the angle formed by the two edges of the maximum range through which the image of the measured target can pass through the lens is called the field of view angle. The size of the field of view angle determines the field of view range of the optical instrument. The larger the field of view angle, the larger the field of view, and the smaller the optical magnification.

[0050] Half Image Height ImgH (Image Hight), represents half of the diagonal length of the effective pixel area on the photosensitive chip, that is, half of the image height of the imaging plane.

[0051] Effective Diameter, the effective diameter of an optical element refers to the diameter of the area that actually participates in imaging or light passing in an optical element (such as a lens, prism, etc.). It reflects the maximum physical diameter of the light beam that is not blocked by the mechanical structure when passing through the optical element.

[0052] Effective Aperture, refers to the ratio of the front lens beam diameter (or lens diameter) to the focal length when the lens is wide open, that is, the reciprocal of the aperture number. The maximum effective aperture represents the maximum light passing ability of an optical lens.

[0053] Aberration, in the paraxial region of an optical system, it has the properties of an ideal optical system. The paraxial light rays emitted from a point on an object intersect at a point on the image plane (i.e., the paraxial image point). However, the light rays actually passing through different apertures of the lens are difficult to perfectly intersect at a point, but have a certain deviation from the position of the paraxial image point. These differences are collectively referred to as aberrations.

[0054] Distortion, also known as aberration, refers to the degree of distortion of the image formed by an optical system with respect to the object itself. Distortion is caused by the influence of the spherical aberration of the aperture stop. The intersection height of the chief ray of different fields of view with the Gaussian image plane after passing through the optical system is not equal to the ideal image height, and the difference between the two is the distortion. Therefore, distortion only changes the imaging position of off-axis object points on the ideal plane, causing the shape of the image to be distorted, but does not affect the clarity of the image.

[0055] Astigmatism occurs because the object point is not on the optical axis of the optical system, and the light beam emitted by it has an inclination angle with the optical axis. After the light beam is refracted by the lens, the convergence points of its meridional thin beam and sagittal thin beam are not at the same point. That is, the light beam cannot be focused on a single point, resulting in unclear imaging, so astigmatism is generated. The meridional thin beam and sagittal thin beam are the names of the light beams in two perpendicular planes within a rotationally symmetric optical system.

[0056] A Camera Monitor System (CMS) is an in-vehicle system that fully replaces traditional optical rearview mirrors. The camera is installed near the traditional rearview mirror at the front upper part of the vehicle.

[0057] The embodiments of the present application provide a terminal device, which includes but is not limited to devices with a camera function such as automobiles (including fuel vehicles, electric vehicles, and hybrid vehicles, etc.), monitors, mobile phones, tablet computers, laptop computers, wearable devices, augmented reality (AR) glasses, AR helmets, virtual reality (VR) glasses, VR helmets, laptop computers, personal digital assistants (PDAs), or cameras.

[0058] As Figure 1 shown, in one embodiment, the terminal device 1 can be, for example, an automobile. The terminal device 1 may include a main body 101 and a camera module 200. The camera module 200 can be a CMS electronic exterior rearview camera and can be located, for example, at the position where the traditional rearview mirror is located.

[0059] It can be understood that Figure 1 the structure, size, quantity, and position of the camera module 200 shown are only illustrative and not a limitation of this embodiment. In another embodiment, the camera module 200 can also be a side rearview camera, a front view camera, etc. The camera module 200 can be located below the traditional rearview mirror or at the front of the vehicle head, etc.

[0060] Figure 2 It is a schematic diagram of the structure of the camera module 200 in one embodiment. As Figure 2As shown, the camera module 200 may include an image sensor chip 201 and an optical lens 300. The image sensor chip 201 is disposed on the image side of the optical lens 300. The optical lens 300 is configured to receive the optical signal of the object to be photographed and project it onto the image sensor chip 201, and the image sensor chip 201 is configured to convert the optical signal corresponding to the object to be photographed into an image signal.

[0061] Figure 3 is Figure 2 a schematic structural diagram of the optical lens 300 in. Combining Figure 2 and Figure 3 As shown, the optical lens 300 has a total of six lenses with refractive power. Along the optical axis O from the object side to the image side, they are the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, and the sixth lens L6 in sequence. During imaging, light enters the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, and the sixth lens L6 in sequence from the object side of the first lens L1, and finally forms an image on the imaging surface IMG of the optical lens 300. The imaging surface IMG may be located on the side of the image sensor chip 201 in the camera module 200 facing the sixth lens L6.

[0062] As Figure 3 shown, the first lens L1 has a negative refractive power. The object side surface S1 of the first lens L1 is convex near the optical axis O, and the image side surface S2 of the first lens L2 is concave near the optical axis O. By setting as above, it is beneficial to increase the incident angle of light, expand the field of view angle of the optical lens 300. At the same time, it is also beneficial to reduce the aperture of the side of the optical lens 300 far from the imaging surface IMG (hereinafter referred to as the head).

[0063] As Figure 3 shown, the second lens L2 may have a positive refractive power, which is beneficial to smoothly enter the third lens L3 the divergent light passing through the first lens L1 at a small angle. The smooth light is beneficial to improving the decentration tolerance and tilt tolerance of the optical lens 300, and thus is beneficial to improving the imaging quality. In another embodiment, the second lens L2 may also have a negative refractive power, which can further diverge the light passing through the first lens L1. The object side surface S5 of the second lens L2 may be concave, convex or flat, and the image side surface S6 of the second lens L2 may be concave, convex or flat near the optical axis O. This embodiment does not make a limitation on this.

[0064] As Figure 3As shown, the third lens L3 has a positive refractive power, which is conducive to converging the light passing through the second lens L2 and making the light smoothly enter the fourth lens L4. The smooth light is conducive to improving the decentration tolerance and tilt tolerance of the optical lens 300, thereby facilitating the improvement of the imaging quality. The object side surface S5 of the third lens L3 can be concave, convex or flat, and the image side surface S6 of the third lens L3 can be concave, convex or flat near the optical axis O. This embodiment does not limit this.

[0065] As Figure 3 shown, the fourth lens L4 has a positive refractive power, and the image side surface S8 of the fourth lens L4 is convex near the optical axis O, which can converge the light passing through the third lens L3, facilitating the reduction of the total optical length TTL of the optical lens 300 and realizing the miniaturization of the optical lens 300. The object side surface S7 of the fourth lens L4 can be concave, convex or flat near the optical axis. This embodiment does not limit this.

[0066] As Figure 3 shown, the fifth lens L5 has a positive refractive power, and both the object side surface S9 and the image side surface S10 of the fifth lens L5 are convex near the optical axis O. By setting as above, the light passing through the fourth lens L4 can be further converged, facilitating the reduction of the total optical length TTL of the optical lens 300 and realizing the miniaturization of the optical lens 300.

[0067] As Figure 3 shown, the sixth lens L6 has a negative refractive power, the object side surface S11 of the sixth lens L6 is concave near the optical axis O, and the image side surface S12 of the sixth lens L6 is convex near the optical axis O. By setting as above, it is conducive to eliminating the chromatic aberration of the optical lens 300.

[0068] As Figure 3 shown, the fifth lens L5 with a positive refractive power can be combined with the sixth lens L6 with a negative refractive power to form a doublet lens after gluing, which is conducive to reducing the chromatic aberration of the optical lens 300 and correcting the spherical aberration of the optical lens 300, and improving the resolution of the optical lens 300. In another embodiment, the fifth lens L5 and the sixth lens L6 can also be independent lenses.

[0069] Refer to Figure 1 and Figure 3As shown, when the optical lens 300 is applied to terminal devices such as automobiles, the materials of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, and the sixth lens L6 can all be glass. Thus, while the optical lens 300 has good optical effects, it can also reduce the influence of temperature on the above lenses. The optical lens 300 can meet the clear shooting requirements in an environment with a low temperature of -40°C and a high temperature of 105°C. In another embodiment, among the multiple lenses of the optical lens 300, some lenses can be made of glass, and some lenses can be made of plastic, so as to ensure that while reducing the influence of temperature on the lenses to achieve better imaging quality, the processing cost of the optical lens 300 can also be reduced, as well as the weight of the optical lens 300.

[0070] Reference Figure 3 As shown, when the optical lens 300 is applied to terminal devices such as mobile phones and tablet computers, the materials of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, and the sixth lens L6 can be selected as plastic to reduce the overall weight of the optical lens 300.

[0071] Reference Figure 3 As shown, in one embodiment, the first lens L1 can be an aspherical lens, and the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, and the sixth lens L6 can all be spherical lenses. Spherical lenses have the characteristics of simple manufacturing process and low production cost. Aspherical lenses can enable the object side or the image side of the lens to have a more flexible design, so that the lens can well solve the problems of unclear imaging, distorted field of view, or narrow field of view, etc., even when the size is small and thin, which is beneficial to shortening the length of the optical lens 300. Through the combined design of spherical and aspherical lenses, not only can the processability of each lens be improved, which is beneficial to the surface shape design, but also the object side or the image side of the lens can have a more flexible design, so that each lens can well solve the problems of unclear imaging, distorted field of view, or narrow field of view, etc., even when the size is small and thin, and the optical lens 300 can have good imaging quality without setting too many lenses, which is beneficial to shortening the length of the optical lens 300. It can be understood that in another embodiment, the surfaces of the lenses in the optical lens 300 can all be spherical, all be aspherical, or any combination of spherical and aspherical, which can be specifically selected according to actual needs, so no specific limitation is made in this embodiment.

[0072] As Figure 3As shown, in one embodiment, the optical lens 300 may further include a stop STO. The stop STO may be an aperture stop and / or a field stop. For example, the stop STO may be an aperture stop, or the stop STO may be a field stop, or the stop STO may be both an aperture stop and a field stop. By disposing the stop STO between the third lens L3 and the fourth lens L4, the number of lenses on both sides of the stop can be made consistent, and an overall architecture approximately symmetric about the stop is formed. This architecture may be referred to as a bi-Gaussian symmetric architecture. By forming an approximately bi-Gaussian symmetric architecture, the aberrations of the optical lens 300, such as coma, distortion, and lateral chromatic aberration, can be corrected more effectively. It can be understood that in other embodiments, the stop STO may also be disposed between other lenses, or on the object side of the first lens L1. This embodiment does not make specific limitations in this regard.

[0073] As Figure 3 shown, in one embodiment, the optical lens 300 may further include an IR filter IR. The IR filter IR may be disposed between the sixth lens L6 and the imaging surface IMG of the optical lens 300. Exemplarily, the IR filter IR may be an infrared cut-off filter to filter out infrared light and allow visible light to pass through, making the imaging more in line with the visual experience of the human eye, thereby improving the imaging quality. In another embodiment, the IR filter IR may be an infrared band-pass filter to allow infrared light to pass through and reflect visible light to achieve infrared imaging of the optical lens 300, enabling the optical lens 300 to image in low-light environments or special application scenarios and obtain good imaging quality. It can be understood that the IR filter IR may be made of plastic, or made of optical glass with a coating, or an IR filter of other materials, which can be selected according to actual needs. This embodiment does not make specific limitations in this regard. In another embodiment, the optical lens 300 may also not include the IR filter IR.

[0074] Combined Figure 2 and Figure 3 shown, in one embodiment, the optical lens 300 may further include a cover glass CG. The cover glass CG may be disposed between the IR filter IR and the imaging surface IMG of the optical lens 300, thereby being able to protect the photosensitive chip 201 and prevent dust. The cover glass CG may be made of plastic, or made of optical glass with a coating, or a cover glass of other materials, which can be selected according to actual needs. This embodiment does not make specific limitations in this regard. It can be understood that the cover glass CG may be a part of the optical lens 300, or may be removed from the optical lens 300. However, when the cover glass CG is removed, the total optical length TTL of the optical lens 300 remains unchanged.

[0075] In this embodiment, the maximum field of view FOV of the optical lens 300 satisfies the relation: 110° ≤ FOV ≤ 125°. When the optical lens 300 satisfies the above relation, the optical lens 300 can have a relatively large field of view, which is beneficial for the optical lens 300 to obtain information of the object to be photographed within a larger angle, so that the optical lens 300 meets the requirements of a large field of view.

[0076] In this embodiment, the f-number FNO of the optical lens 300 satisfies the relation: 2 ≤ FNO ≤ 2.4. When the optical lens 300 satisfies the above relation, the optical lens 300 has a relatively large light entrance amount, can improve the exposure efficiency of the optical lens 300 under low light conditions (such as dusk, night, etc.), and at the same time ensure good resolution of the optical lens 300 and improve the imaging quality of the optical lens 300.

[0077] In this embodiment, by controlling the field of view FOV and the f-number FNO of the optical lens 300 within the above ranges, the optical lens 300 can not only meet the requirements of a large field of view, but also ensure sufficient light entrance amount under low light conditions, which is beneficial to improving the imaging quality of the optical lens 300.

[0078] In some embodiments, half of the image height corresponding to the maximum field of view of the optical lens 300 (hereinafter referred to as half image height) ImgH, and the effective focal length F of the optical lens 300, can satisfy the relation: 0.79 ≤ ImgH / F ≤ 1. When the optical lens 300 satisfies the above relation, the ratio of the half image height ImgH to the effective focal length F of the optical lens 300 can be reasonably configured, which is beneficial for the optical lens 300 to have a large depth of field while meeting the requirements of high imaging clarity; at the same time, it is also beneficial to expand the field of view of the optical lens 300 and achieve large-range shooting.

[0079] In some embodiments, the field of view FNO and the f-number FNO of the optical lens 300 can satisfy the relation: 45° ≤ FOV / FNO ≤ 60°. When the optical lens 300 satisfies the above relation, the optical lens 300 can achieve a balance between the field of view range and the light entrance amount, optimize the depth of field, improve the optical performance under low light conditions, and reduce distortion at the same time.

[0080] In some embodiments, the overall optical length TTL and the half image height ImgH of the optical lens 300 can satisfy the relation: 4.5 ≤ TTL / ImgH ≤ 8.1. By limiting the ratio of TTL to ImgH within the above range, the optical lens can meet the requirements of high pixels and the requirements of miniaturization.

[0081] In some embodiments, the curvature radius R1 of the object side surface S1 of the first lens L1 at the optical axis and the effective focal length F of the optical lens 300 may satisfy the relational expression: 1.5 ≤ R1 / F ≤ 5. When the optical lens 300 satisfies the above relational expression, the field of view angle of the optical lens 300 can be effectively enlarged, large field of view light can be received, which is beneficial to achieving a large aperture.

[0082] In some embodiments, the curvature radius R5 of the object side surface S5 of the third lens L3 and the curvature radius R6 of the image side surface S6 of the third lens L3 may satisfy the relational expression: 0.3 ≤ |R5 / R6| ≤ 3.2. By limiting the ratio of the curvature radii of the object side surface S5 and the image side surface S6 of the third lens L3 within the above range, the refractive power configuration of the third lens L3 of the optical lens 300 can be made uniform, which is beneficial to reducing the field curvature and astigmatism of the optical lens 300 and reducing distortion.

[0083] In some embodiments, the curvature radius R7 of the object side surface S7 of the fourth lens L4 and the curvature radius R8 of the image side surface S8 of the fourth lens L4 may satisfy the relational expression: 0.3 ≤ (R7 - R8) / (R7 + R8) ≤ 1.1. When the optical lens 300 satisfies the above relational expression, it is beneficial to reasonably control the curvature radii of the object side surface S7 and the image side surface S8 of the fourth lens L4, and then effectively control the shape of the fourth lens L4, so that the fourth lens L4 refracts the incident light more gently and avoids increasing aberration. Below the lower limit of the relational expression, the difference in the curvature radii of the object side surface S7 and the image side surface S8 of the fourth lens at the optical axis O is too large, the object side surface S7 or the image side surface S8 of the fourth lens L4 is too flat, and the refraction effect of the fourth lens L4 on the incident light is weakened, which is not conducive to controlling the total optical length TTL; exceeding the upper limit of the relational expression, the difference in the curvature radii of the object side surface S7 and the image side surface S8 of the fourth lens L4 at the optical axis O is too small, and the bending degree of the fourth lens L4 on the light is too large, which is likely to cause reflection with other lenses and generate ghost images.

[0084] In some embodiments, the focal length F2 of the second lens L2 and the effective focal length F of the optical lens 300 may satisfy the relational expression: 5 ≤ |F2 / F| ≤ 17. By limiting the focal length F2 of the second lens L2 and the effective focal length F of the optical lens 300 within the above range, it is beneficial to the smooth transition of light, reduce the sensitivity to system tolerances (such as decentration tolerance and tilt tolerance), and improve the stability of the optical lens 300.

[0085] In some embodiments, the focal length F3 of the third lens L3 and the effective focal length F of the optical lens 300 may satisfy the relational expression: 2 ≤ F3 / F ≤ 22. By limiting the focal length F3 of the third lens L3 and the effective focal length F of the optical lens 300 within the above range, it is possible to avoid the third lens L3 introducing too much spherical aberration and improve the resolution ability of the optical lens 300.

[0086] In some embodiments, the focal length F5 of the fifth lens L5 and the effective focal length F of the optical lens 300 may satisfy the relational expression: 0.9 ≤ F5 / F ≤ 1.5. By limiting the focal length F5 of the fifth lens L5 and the effective focal length F of the optical lens 300 within the above range, the angle of the chief ray incident on the photosensitive chip 201 can be made less than the maximum chief ray angle of the photosensitive chip 201, avoiding color cast in the image.

[0087] In some embodiments, the combined focal length F56 of the fifth lens L5 and the sixth lens L6 and the effective focal length F of the optical lens 300 may satisfy the relational expression: 2.3 ≤ F56 / F ≤ 3.6. By limiting the ratio of the combined focal length F56 of the fifth lens L5 and the sixth lens L6 to the effective focal length F of the optical lens 300 within the above range, excessive spherical aberration introduced by the fifth lens L5 and the sixth lens L6 can be avoided, improving the resolution ability of the optical lens 300.

[0088] In some embodiments, the thickness CT4 of the fourth lens L4 in the direction of the optical axis O and the distance ET4 in the direction of the optical axis O from the maximum effective aperture of the object side surface S7 of the fourth lens L4 to the maximum effective aperture of the image side surface S8 of the fourth lens L4 may satisfy the relational expression: 0.65 ≤ CT4 / ET4 ≤ 1.3. By limiting the ratio of CT4 to ET4 within the above range, the ratio of the central thickness to the edge thickness of the fourth lens L4 can be reasonably controlled, so that the overall thickness of the fourth lens L4 is reasonable, which is beneficial to the miniaturized design of the optical lens 300.

[0089] In some embodiments, the thickness CT5 of the fifth lens L5 in the direction of the optical axis O and the distance ET5 in the direction of the optical axis O from the maximum effective aperture of the object side surface S9 of the fifth lens L5 to the maximum effective aperture of the image side surface S10 of the fifth lens L5 may satisfy the relational expression: 2 ≤ CT5 / ET5 ≤ 4.65. By limiting the ratio of CT5 to ET5 within the above range, the ratio of the central thickness to the edge thickness of the fifth lens L5 can be reasonably controlled, so that the overall thickness of the fifth lens L5 is reasonable, which is beneficial to the miniaturized design of the optical lens 300.

[0090] In some embodiments, the thickness CT6 of the sixth lens L6 in the direction of the optical axis O and the distance ET6 in the direction of the optical axis O from the maximum effective aperture of the object side surface S11 of the sixth lens L6 to the maximum effective aperture of the image side surface S12 of the sixth lens L6 may satisfy the relational expression: 0.5 ≤ CT6 / ET6 ≤ 0.85. By limiting the ratio of CT6 to ET6 within the above range, the ratio of the central thickness to the edge thickness of the sixth lens L6 can be reasonably controlled, so that the overall thickness of the sixth lens L6 is reasonable, which is beneficial to the miniaturized design of the optical lens 300.

[0091] In some embodiments, the sagittal height SAGS1 of the edge of the optical effective diameter of the object side surface S1 of the first lens L1 and the thickness CT1 of the first lens L1 in the direction of the optical axis O may satisfy the relational expression: 0.05 ≤ SAGS1 / CT1 ≤ 0.65. By limiting the ratio of SAGS1 to CT1 within the above range, it is beneficial to control the curvature of the object side surface S1 of the first lens L1, thereby controlling the aperture of the first lens L1, which is beneficial to the processing of the first lens L1. When the ratio of SAGS1 to CT1 exceeds the upper limit of the above relational expression, the object side surface S1 of the first lens L1 is too curved, which is not conducive to the surface shape control of the first lens L1 and increases the risk of ghosting. When the ratio of SAGS1 to CT1 is lower than the lower limit of the above relational expression, the first lens L1 is too thick, which is not conducive to the miniaturization of the optical lens 300.

[0092] In some embodiments, the sagittal height SAGS2 of the edge of the optical effective diameter of the image side surface S2 of the first lens L1 and the thickness CT1 of the first lens L1 in the direction of the optical axis O may satisfy the relational expression: 0.55 ≤ SAGS2 / CT1 ≤ 1.9. By limiting the ratio of SAGS2 to CT1 within the above range, it is beneficial to control the curvature of the image side surface S2 of the first lens L1, thereby controlling the aperture of the first lens L1, which is beneficial to the processing of the first lens L1. When the ratio of SAGS2 to CT1 exceeds the upper limit of the above relational expression, the image side surface S2 of the first lens L1 is too curved, which is not conducive to the surface shape control of the first lens L1 and increases the risk of ghosting. When the ratio of SAGS2 to CT1 is lower than the lower limit of the above relational expression, the first lens L1 is too thick, which is not conducive to the miniaturization of the optical lens 300.

[0093] In some embodiments, the focal length F1 of the first lens L1 and the thickness CT1 of the first lens L1 in the direction of the optical axis O may satisfy the relational expression: -5 ≤ F1 / CT1 ≤ -2. By limiting the ratio of F1 to CT1 within the above range, the incident light rays entering the optical lens 300 at large angles can enter smoothly, thereby expanding the field of view angle range of the optical lens 300 and enabling the optical lens 300 to meet the requirements of a large field of view.

[0094] In some embodiments, half of the maximum effective aperture SD1 of the object side surface S1 of the first lens L1 and the semi-image height ImgH of the optical lens 300 may satisfy the relational expression: 1 ≤ SD1 / ImgH ≤ 1.65. By limiting the ratio of SD1 to ImgH within the above range, the optical lens 300 can meet the requirements of adapting to a large-size imaging surface IMG, while taking into account the miniaturization design of the head of the optical lens 300.

[0095] In some embodiments, half of the maximum effective aperture SD1 of the object side surface S1 of the first lens L1 and half of the maximum effective aperture SD12 of the image side surface S12 of the sixth lens L6 may satisfy the relational expression: 1.3 ≤ SD1 / SD12 ≤ 1.8. By limiting the ratio of SD1 to SD12 within the above range, the aperture of the object side surface S1 of the first lens L1 can be made larger, which can better control the incident angle of light and reduce spherical aberration; while the smaller aperture of the image side surface S12 of the sixth lens L6 can suppress off-axis aberrations (such as coma and astigmatism), thereby achieving aberration balance in the optical system. In addition, it can also make the structure of the optical lens 300 compact, which is beneficial to the miniaturization of the optical lens 300.

[0096] In some embodiments, the combined focal length F123 of the first lens L1, the second lens L2, and the third lens L3 and the combined focal length F456 of the fourth lens L4, the fifth lens L5, and the sixth lens L6 may satisfy the relational expression: -3 ≤ F123 / F456 ≤ -1. By limiting the ratio of the combined focal length of the object side lenses of the aperture STOP to the combined focal length of the image side lenses of the aperture STOP within the above range, it is beneficial to achieve the effects of a large aperture and a large target surface in the optical system; at the same time, the light can fill the entire aperture, which is beneficial to the aberration balance of the optical system.

[0097] In some embodiments, the thickness CT5 of the fifth lens L5 in the direction of the optical axis O and the overall optical length TTL of the optical lens 300 may satisfy the relational expression: 9.7 ≤ TTL / CT5 ≤ 12.3. By limiting the ratio of TTL to CT5 within the above range, the central thickness of the fifth lens L5 can be made larger, which can ensure that the angle of light exiting the fifth lens L5 is smaller and the light exits smoothly, which is beneficial to reducing the eccentricity tolerance and improving the mass production yield of the optical lens 300.

[0098] In some embodiments, the thickness CT5 of the fifth lens L5 in the direction of the optical axis O and the thickness CT6 of the sixth lens L6 in the direction of the optical axis O may satisfy the relational expression: 0.7 ≤ CT5 / CT6 ≤ 1.7. By limiting the ratio of CT5 to CT6 within the above range, the total thickness of the fifth lens and the sixth lens can be reduced, which is beneficial to the miniaturization design of the optical lens.

[0099] In some embodiments, the focal length F1 of the first lens L1 and the effective focal length F of the optical lens 300 may satisfy the relational expression: -1.5 ≤ F1 / F ≤ -1. When the optical lens 300 satisfies the above relational expression, by reasonably configuring the ratio of the focal length F1 of the first lens L1 to the effective focal length F of the optical lens 300, it is possible to avoid the first lens L1 introducing too much spherical aberration and effectively correct aberrations, thereby improving the resolution ability of the optical lens 300.

[0100] In some embodiments, the focal length F4 of the fourth lens L4 and the effective focal length F of the optical lens 300 may satisfy the relationship: 2 ≤ F4 / F ≤ 3.1. When the optical lens 300 satisfies the above relationship, by reasonably configuring the ratio of the focal length F4 of the fourth lens L4 to the effective focal length F of the optical lens 300, it is possible to avoid the fourth lens L4 introducing excessive spherical aberration and improve the resolution of the optical lens 300.

[0101] In some embodiments, the focal length F6 of the sixth lens L6 and the effective focal length F of the optical lens 300 may satisfy the relationship: -2.5 ≤ F1 / F ≤ -1.5. When the optical lens 300 satisfies the above relationship, by reasonably configuring the ratio of the focal length F6 of the sixth lens L6 to the effective focal length F of the optical lens 300, it is possible to avoid the sixth lens L6 introducing excessive spherical aberration and effectively correct aberration, and improve the resolution of the optical lens 300.

[0102] In some embodiments, the focal length F2 of the second lens L2 and the thickness CT2 of the second lens L2 in the direction of the optical axis O may satisfy the relationship: 9 ≤ |F2 / CT2| ≤ 65. When the optical lens 300 satisfies the above relationship, by reasonably configuring the ratio of the focal length F2 of the second lens L2 to the thickness CT2 of the second lens L2, the deflection angle of the light rays in the optical lens 300 can be effectively controlled, so that the light rays are projected smoothly after passing through the second lens L2, thereby reducing the field curvature and astigmatism of the optical lens 300, which is beneficial to reducing the distortion of the optical lens 300.

[0103] In some embodiments, the focal length F3 of the third lens L3 and the thickness CT3 of the third lens L2 in the direction of the optical axis O may satisfy the relationship: 5 ≤ F3 / CT3 ≤ 65. When the optical lens 300 satisfies the above relationship, by reasonably configuring the ratio of the focal length F3 of the third lens L3 to the thickness CT3 of the third lens L3, the light rays projected smoothly by the second lens L2 are converged, thereby reducing the eccentricity sensitivity of the optical lens 300, which is beneficial to improving the resolution of the optical lens 300.

[0104] In some embodiments, the focal length F4 of the fourth lens L4 and the thickness CT4 of the fourth lens L4 in the direction of the optical axis O may satisfy the relationship: 5.5 ≤ F4 / CT4 ≤ 8. When the optical lens 300 satisfies the above relationship, by reasonably configuring the ratio of the focal length F4 of the fourth lens L4 to the thickness CT4 of the fourth lens L4, the light rays projected by the third lens L3 are further converged, thereby reducing the eccentricity sensitivity of the optical lens 300, which is beneficial to improving the resolution of the optical lens 300.

[0105] In some embodiments, the focal length F5 of the fifth lens L5 and the thickness CT5 of the fifth lens L5 in the direction of the optical axis O may satisfy the relational expression: 1.5 ≤ F5 / CT5 ≤ 3. When the optical lens 300 satisfies the above relational expression, by reasonably configuring the ratio of the focal length F5 of the fifth lens L5 to the thickness CT5 of the fifth lens L5, the light rays projected through the fifth lens L5 are further converged, thereby reducing the decentration sensitivity of the optical lens 300, which is beneficial to improving the resolution of the optical lens 300.

[0106] In some embodiments, the focal length F6 of the sixth lens L6 and the thickness CT6 of the sixth lens L6 in the direction of the optical axis O may satisfy the relational expression: -8 ≤ F6 / CT6 ≤ -2. When the optical lens 300 satisfies the above relational expression, by reasonably configuring the ratio of the focal length F6 of the sixth lens L6 to the thickness CT6 of the third lens L6, the sixth lens L6 can effectively correct the aberration generated by the refracted light rays of each lens on the object side, which is beneficial to improving the resolution ability of the optical lens 300.

[0107] In some embodiments, the curvature radius R1 of the object side S1 of the first lens L1 and the curvature radius R2 of the image side S2 of the first lens L1 may satisfy the relational expression: 3 ≤ R1 / R2 ≤ 6.5. By limiting the ratio of the curvature radii of the object side S1 and the image side S2 of the first lens L1 within the above range, the refractive power of the first lens L6 of the optical lens 300 can be evenly configured, thereby controlling the effective aperture of the first lens L1, which is beneficial to achieving a large field of view of the optical lens 300.

[0108] In some embodiments, the curvature radius R3 of the object side S3 of the second lens L2 and the curvature radius R4 of the image side S4 of the second lens L2 may satisfy the relational expression: 0.3 ≤ |R3 / R4| ≤ 3.6. By limiting the ratio of the curvature radii of the object side S3 and the image side S4 of the second lens L2 within the above range, the refractive power of the second lens L2 of the optical lens 300 can be evenly configured, which is beneficial to reducing the field curvature and astigmatism of the optical lens and reducing distortion.

[0109] In some embodiments, the curvature radius R7 of the object side S7 of the fourth lens L4 and the curvature radius R8 of the image side S8 of the fourth lens L4 may satisfy the relational expression: 1.9 ≤ |R7 / R8| ≤ 35. By limiting the ratio of the curvature radii of the object side S7 and the image side S8 of the fourth lens L4 within the above range, the refractive power of the fourth lens L4 of the optical lens 300 can be evenly configured, which is beneficial to reducing the field curvature and astigmatism of the optical lens and reducing distortion.

[0110] In some embodiments, the radius of curvature R9 of the object side surface S9 of the fifth lens L5 and the radius of curvature R10 of the image side surface S10 of the fifth lens L5 may satisfy the relationship: -5.2 ≤ R9 / R10 ≤ -2.2. By limiting the ratio of the radius of curvature of the object side surface S9 and the image side surface S10 of the fifth lens L5 within the above range, the refractive power of the fifth lens L5 of the optical lens 300 can be evenly configured, which is beneficial to reducing the field curvature and astigmatism of the optical lens and reducing distortion.

[0111] In some embodiments, the radius of curvature R11 of the object side surface S11 of the sixth lens L6 and the radius of curvature R12 of the image side surface S12 of the sixth lens L6 may satisfy the relationship: 0.2 ≤ R11 / R12 ≤ 0.45. By limiting the ratio of the radius of curvature of the object side surface S11 and the image side surface S12 of the sixth lens L6 within the above range, the refractive power of the sixth lens L6 of the optical lens 300 can be evenly configured, which is beneficial to correcting the distortion and aberration generated by the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, and the fifth lens L5, and improving the resolution of the optical lens 300.

[0112] The optical lens 300 of this embodiment will be described in detail below in combination with specific parameters.

[0113] First Embodiment

[0114] As Figure 3 shown, in the first embodiment, the optical lens 300 includes a first lens L1, a second lens L2, a third lens L3, a stop STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, an IR filter, and a cover glass CG, which are sequentially arranged from the object side to the image side along the optical axis O. The first lens L1 has a negative refractive power, the second lens L2 has a positive refractive power, the third lens L3 has a positive refractive power, the fourth lens L4 has a positive refractive power, the fifth lens L5 has a positive refractive power, and the sixth lens L6 has a negative refractive power.

[0115] As Figure 3 shown, the object side surface S1 of the first lens L1 is convex near the optical axis O, and the image side surface S2 of the first lens L1 is concave near the optical axis O; the object side surface S3 of the second lens L2 is convex near the optical axis O, and the image side surface S4 of the second lens L2 is concave near the optical axis O; the object side surface S5 of the third lens L3 is convex near the optical axis O, and the image side surface S6 of the third lens L3 is concave near the optical axis O; the object side surface S7 of the fourth lens L4 is concave near the optical axis O, and the image side surface S8 of the fourth lens L4 is convex near the optical axis O; the object side surface S9 of the fifth lens L5 is convex near the optical axis O, and the image side surface S10 of the fifth lens L5 is convex near the optical axis O; the object side surface S11 of the sixth lens L6 is concave near the optical axis O, and the image side surface S12 of the sixth lens L6 is convex near the optical axis O.

[0116] The Y radius in Table 1a is the curvature radius of the object side or the image side 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 of the lens to the next surface on the optical axis O. The value of the stop STO in the "thickness" parameter column is the distance from the stop STO to the vertex of the next surface (the vertex refers to the intersection point of the surface and the optical axis O) on the optical axis O. It can be understood that the units of the Y radius, thickness, and focal length in Table 1a are all mm, and the refractive index, Abbe number, and reference wavelength of the focal length of each lens in Table 1a are all 546 nm.

[0117] The surface profiles of the aspherical lenses can be defined by, but not limited to, the following aspherical formula:

[0118]

[0119] Where Z is the distance from the corresponding point on the aspherical surface to the plane tangent to the surface vertex, 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), r is the distance from any point on the aspherical surface to the optical axis O, k is the conic constant, and Ai is the coefficient corresponding to the i-th high-order term in the aspherical surface profile formula.

[0120] In the first embodiment, both the object side S1 and the image side S2 of the first lens L1 are aspherical. Table 1b gives the conic constant k, high-order term coefficients A4, A6, A8, A10, A12, A14, and A16 that can be used for each aspherical surface in the first embodiment.

[0121]

[0122]

[0123] Partial parameters of the optical lens in the first embodiment of Table 1a

[0124]

[0125] Surface profile parameters of each aspherical surface of the optical lens in the first embodiment of Table 1b

[0126] Figure 4 Characterizes the imaging quality of the optical lens 300 in the first embodiment. Figure 4 In (A), it shows the longitudinal spherical aberration curves of the optical lens 300 in the first embodiment at wavelengths of 656 nm, 587 nm, 546 nm, 480 nm, and 435 nm respectively. Among them, the abscissa represents the focus shift, with the unit of mm, and the ordinate represents the normalized field of view. As Figure 4As shown in (A) therein, the spherical aberration value of the optical lens 300 in the first embodiment is relatively good, indicating that the imaging quality of the optical lens 300 in this embodiment is better. Figure 4 (B) therein schematically shows the astigmatism curve graph of the optical lens 300 in the first embodiment at a wavelength of 546 nm. Among them, the abscissa represents the focus shift, with the unit of mm, and the ordinate represents the field angle, with the unit of deg. T in the astigmatism curve graph represents the curvature of the imaging surface IMG in the meridional direction, and S represents the curvature of the imaging surface IMG in the sagittal direction. As Figure 4 shown in (B) therein, at this wavelength, the astigmatism of the optical lens 300 is well compensated. Figure 4 (C) therein schematically shows the distortion curve graph of the optical lens 300 in the first embodiment at a wavelength of 546 nm. Among them, the abscissa represents the distortion, with the unit of %, and the ordinate represents the field angle, with the unit of deg. As Figure 4 shown in (C) therein, at this wavelength, the distortion of the optical lens 300 is well corrected.

[0127] Second Embodiment

[0128] As Figure 5 shown, in the second embodiment, the optical lens 300 includes a first lens L1, a second lens L2, a third lens L3, a stop STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, an IR filter, and a protective glass CG, which are sequentially arranged along the optical axis O from the object side to the image side. The first lens L1 has a negative refractive power, the second lens L2 has a negative refractive power, the third lens L3 has a positive refractive power, the fourth lens L4 has a positive refractive power, the fifth lens L5 has a positive refractive power, and the sixth lens L6 has a negative refractive power.

[0129] As Figure 5 shown, the object side surface S1 of the first lens L1 is convex near the optical axis O, and the image side surface S2 of the first lens L1 is concave near the optical axis O; the object side surface S3 of the second lens L2 is concave near the optical axis O, and the image side surface S4 of the second lens L2 is concave near the optical axis O; the object side surface S5 of the third lens L3 is convex near the optical axis O, and the image side surface S6 of the third lens L3 is convex near the optical axis O; the object side surface S7 of the fourth lens L4 is concave near the optical axis O, and the image side surface S8 of the fourth lens L4 is convex near the optical axis O; the object side surface S9 of the fifth lens L5 is convex near the optical axis O, and the image side surface S10 of the fifth lens L5 is convex near the optical axis O; the object side surface S11 of the sixth lens L6 is concave near the optical axis O, and the image side surface S12 of the sixth lens L6 is convex near the optical axis O.

[0130] Table 2a shows some parameters of the optical lens 300 in the second embodiment. The meanings of each parameter can be referred to Table 1a and will not be elaborated here.

[0131] In the second embodiment, both the object side surface S1 and the image side surface S2 of the first lens L1 are aspherical surfaces. Table 2b gives the conic constants k, and the higher-order term coefficients A4, A6, A8, A10, A12, A14, and A16 of the respective aspherical surfaces that can be used in the second embodiment. Among them, the aspherical surface profiles can be defined by the formulas given in the first embodiment.

[0132]

[0133] Table 2a Partial parameters of the optical lens in the second embodiment

[0134]

[0135] Table 2b Aspherical surface profile parameters of the optical lens in the second embodiment

[0136] Please refer to Figure 6 , from Figure 6 in the (A) spherical aberration curve graph, (B) ray astigmatism graph, and (C) distortion curve graph, it can be seen that the spherical aberration, astigmatism, and distortion of the optical lens 300 are all well controlled. Thus, the optical lens 300 of the second embodiment has good imaging quality. In addition, regarding Figure 6 in (A), Figure 6 in (B), and Figure 6 in (C), the wavelengths corresponding to the respective curves can refer to the content described in (A) in the first embodiment regarding Figure 4 in (A), Figure 4 in (B), Figure 4 in (C), which will not be elaborated here.

[0137] Third Embodiment

[0138] As Figure 7 shown, in the third embodiment, the optical lens 300 includes a first lens L1, a second lens L2, a third lens L3, a stop STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a filter IR, and a protective glass CG that are sequentially arranged along the optical axis O from the object side to the image side. The first lens L1 has a negative refractive power, the second lens L2 has a positive refractive power, the third lens L3 has a positive refractive power, the fourth lens L4 has a positive refractive power, the fifth lens L5 has a positive refractive power, and the sixth lens L6 has a negative refractive power.

[0139] As Figure 7As shown, the object side surface S1 of the first lens L1 is convex near the optical axis O, and the image side surface S2 of the first lens L1 is concave near the optical axis O; the object side surface S3 of the second lens L2 is convex near the optical axis O, and the image side surface S4 of the second lens L2 is concave near the optical axis O; the object side surface S5 of the third lens L3 is convex near the optical axis O, and the image side surface S6 of the third lens L3 is convex near the optical axis O; the object side surface S7 of the fourth lens L4 is concave near the optical axis O, and the image side surface S8 of the fourth lens L4 is convex near the optical axis O; the object side surface S9 of the fifth lens L5 is convex near the optical axis O, and the image side surface S10 of the fifth lens L5 is convex near the optical axis O; the object side surface S11 of the sixth lens L6 is concave near the optical axis O, and the image side surface S12 of the sixth lens L6 is convex near the optical axis O.

[0140] Table 3a shows partial parameters of the optical lens 300 in the third embodiment. The meanings of the various parameters can be referred to Table 1a and will not be elaborated here.

[0141] In the third embodiment, both the object side surface S1 and the image side surface S2 of the first lens L1 are aspherical surfaces. Table 3b gives the conic constants k, and the higher-order term coefficients A4, A6, A8, A10, A12, A14, and A16 of the aspherical surfaces that can be used in the third embodiment. Among them, the aspherical surface profiles can be defined by the formulas given in the first embodiment.

[0142]

[0143] Table 3a Partial parameters of the optical lens in the third embodiment

[0144]

[0145] Table 3b Aspherical surface profile parameters of the optical lens in the third embodiment

[0146] Please refer to Figure 8 , from Figure 8 in the (A) spherical aberration curve graph, (B) astigmatism ray graph, and (C) distortion curve graph, it can be seen that the spherical aberration, astigmatism, and distortion of the optical lens 300 are all well controlled. Thus, the optical lens 300 in the third embodiment has good imaging quality. In addition, regarding Figure 8 in (A), Figure 8 in (B), and Figure 8 in (C), the wavelengths corresponding to the respective curves can refer to the content described in the first embodiment regarding Figure 4 in (A), Figure 4 in (B), Figure 4 in (C), which will not be elaborated here.

[0147] Fourth Embodiment

[0148] AsFigure 9 As shown in Figure 9 , in the fourth embodiment, the optical lens 300 includes a first lens L1, a second lens L2, a third lens L3, a stop STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, an IR filter, and a protective glass CG, which are sequentially arranged from the object side to the image side along the optical axis O. The first lens L1 has a negative refractive power, the second lens L2 has a positive refractive power, the third lens L3 has a positive refractive power, the fourth lens L4 has a positive refractive power, the fifth lens L5 has a positive refractive power, and the sixth lens L6 has a negative refractive power.

[0149] As Figure 9 shown in Figure 9 , on the object side surface S1 of the first lens L1, it is convex near the optical axis O, and on the image side surface S2 of the first lens L1, it is concave near the optical axis O; on the object side surface S3 of the second lens L2, it is concave near the optical axis O, and on the image side surface S4 of the second lens L2, it is convex near the optical axis O; on the object side surface S5 of the third lens L3, it is convex near the optical axis O, and on the image side surface S6 of the third lens L3, it is concave near the optical axis O; on the object side surface S7 of the fourth lens L4, it is concave near the optical axis O, and on the image side surface S8 of the fourth lens L4, it is convex near the optical axis O; on the object side surface S9 of the fifth lens L5, it is convex near the optical axis O, and on the image side surface S10 of the fifth lens L5, it is convex near the optical axis O; on the object side surface S11 of the sixth lens L6, it is concave near the optical axis O, and on the image side surface S12 of the sixth lens L6, it is convex near the optical axis O.

[0150] Table 4a shows some parameters of the optical lens 300 in the fourth embodiment. For the meaning of each parameter, please refer to Table 1a, which will not be elaborated here.

[0151] In the fourth embodiment, both the object side surface S1 and the image side surface S2 of the first lens L1 are aspherical surfaces. Table 4b gives the conic constant k, and the higher-order term coefficients A4, A6, A8, A10, A12, A14, and A16 of the aspherical surfaces that can be used in the fourth embodiment. Among them, the aspherical surface profiles can be defined by the formula given in the first embodiment.

[0152]

[0153] Table 4a Some parameters of the optical lens in the fourth embodiment

[0154]

[0155]

[0156] Table 4b Aspherical surface profile parameters of the optical lens in the fourth embodiment

[0157] Please refer to Figure 10 , from Figure 10From the (A) spherical aberration curve graph, (B) astigmatism graph, and (C) distortion curve graph in it, it can be seen that the spherical aberration, astigmatism, and distortion of the optical lens 300 are all well controlled, so the optical lens 300 of the fourth embodiment has good imaging quality. In addition, regarding Figure 10 in (A), Figure 10 in (B), and Figure 10 the wavelengths corresponding to the respective curves in (C) in it can refer to the content described in (A), Figure 4 in (B), Figure 4 in (C) in the first embodiment, and the content described in (C) in Figure 4 will not be elaborated here.

[0158] Fifth Embodiment

[0159] As Figure 11 shown, in the fifth embodiment, the optical lens 300 includes a first lens L1, a second lens L2, a third lens L3, a stop STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a filter IR, and a protective glass CG that are sequentially arranged from the object side to the image side along the optical axis O. The first lens L1 has a negative refractive power, the second lens L2 has a positive refractive power, the third lens L3 has a positive refractive power, the fourth lens L4 has a positive refractive power, the fifth lens L5 has a positive refractive power, and the sixth lens L6 has a negative refractive power.

[0160] As Figure 11 shown, the object side surface S1 of the first lens L1 is a convex surface near the optical axis O, and the image side surface S2 of the first lens L1 is a concave surface near the optical axis O; the object side surface S3 of the second lens L2 is a convex surface near the optical axis O, and the image side surface S4 of the second lens L2 is a concave surface near the optical axis O; the object side surface S5 of the third lens L3 is a convex surface near the optical axis O, and the image side surface S6 of the third lens L3 is a concave surface near the optical axis O; the object side surface S7 of the fourth lens L4 is a convex surface near the optical axis O, and the image side surface S8 of the fourth lens L4 is a convex surface near the optical axis O; the object side surface S9 of the fifth lens L5 is a convex surface near the optical axis O, and the image side surface S10 of the fifth lens L5 is a convex surface near the optical axis O; the object side surface S11 of the sixth lens L6 is a concave surface near the optical axis O, and the image side surface S12 of the sixth lens L6 is a convex surface near the optical axis O.

[0161] Table 5a shows partial parameters of the optical lens 300 in the fifth embodiment. The meanings of the respective parameters can be referred to Table 1a, and will not be elaborated here.

[0162] In the fifth embodiment, both the object side surface S1 and the image side surface S2 of the first lens L1 are aspherical surfaces. Table 5b gives the conic constants k, and the higher-order term coefficients A4, A6, A8, A10, A12, A14, and A16 of the respective aspherical surfaces that can be used in the fifth embodiment. Among them, the aspherical surface profiles can be defined by the formula given in the first embodiment.

[0163]

[0164]

[0165] Partial parameters of the optical lens in the fifth embodiment in Table 5a

[0166]

[0167] Surface type parameters of each aspherical surface of the optical lens in the fifth embodiment in Table 5b

[0168] Please refer to Figure 12 and it can be seen from the (A) spherical aberration curve graph, (B) astigmatism graph and (C) distortion curve graph in Figure 12 that the spherical aberration, astigmatism and distortion of the optical lens 300 are all well controlled, so that the optical lens 300 in the fifth embodiment has good imaging quality. In addition, regarding the wavelengths corresponding to the curves in (A) in Figure 12 , (B) in Figure 12 and (C) in Figure 12 , reference can be made to the content described in (A) in the first embodiment regarding Figure 4 , (B) in Figure 4 and (C) in Figure 4 , which will not be elaborated here.

[0169] Sixth embodiment

[0170] As Figure 13 shown, in the sixth embodiment, the optical lens 300 includes a first lens L1, a second lens L2, a third lens L3, a stop STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, an IR filter and a protective glass CG, which are sequentially arranged from the object side to the image side along the optical axis O. The first lens L1 has a negative refractive power, the second lens L2 has a positive refractive power, the third lens L3 has a positive refractive power, the fourth lens L4 has a positive refractive power, the fifth lens L5 has a positive refractive power, and the sixth lens L6 has a negative refractive power.

[0171] As Figure 13As shown, the object side surface S1 of the first lens L1 is convex near the optical axis O, and the image side surface S2 of the first lens L1 is concave near the optical axis O; the object side surface S3 of the second lens L2 is concave near the optical axis O, and the image side surface S4 of the second lens L2 is convex near the optical axis O; the object side surface S5 of the third lens L3 is convex near the optical axis O, and the image side surface S6 of the third lens L3 is concave near the optical axis O; the object side surface S7 of the fourth lens L4 is concave near the optical axis O, and the image side surface S8 of the fourth lens L4 is convex near the optical axis O; the object side surface S9 of the fifth lens L5 is convex near the optical axis O, and the image side surface S10 of the fifth lens L5 is convex near the optical axis O; the object side surface S11 of the sixth lens L6 is concave near the optical axis O, and the image side surface S12 of the sixth lens L6 is convex near the optical axis O.

[0172] Table 6a shows partial parameters of the optical lens 300 in the sixth embodiment. The meanings of the parameters can be referred to Table 1a and will not be elaborated here.

[0173] In the sixth embodiment, both the object side surface S1 and the image side surface S2 of the first lens L1 are aspherical surfaces. Table 6b gives the conic constants k, and the higher-order term coefficients A4, A6, A8, A10, A12, A14, and A16 of the aspherical surfaces that can be used in the sixth embodiment. Among them, the aspherical surface profiles can be defined by the formulas given in the first embodiment.

[0174]

[0175]

[0176] Table 6a Partial parameters of the optical lens in the sixth embodiment

[0177]

[0178] Table 6b Aspherical surface profile parameters of the optical lens in the sixth embodiment

[0179] Please refer to Figure 14 , from Figure 14 in the spherical aberration curve graph (A), the astigmatism ray graph (B), and the distortion curve graph (C), it can be seen that the spherical aberration, astigmatism, and distortion of the optical lens 300 are all well controlled. Thus, the optical lens 300 in the sixth embodiment has good imaging quality. In addition, regarding Figure 14 in (A), Figure 14 in (B), and Figure 14 in (C), the wavelengths corresponding to the curves can refer to the content described in (A) in the first embodiment regarding Figure 4 in (A), Figure 4 in (B), Figure 4 in (C), which will not be elaborated here.

[0180] The Seventh Embodiment

[0181] As Figure 15 shown, in the seventh embodiment, the optical lens 300 includes a first lens L1, a second lens L2, a third lens L3, a stop STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, an infrared filter IR, and a protective glass CG, which are sequentially arranged from the object side to the image side along the optical axis O. The first lens L1 has a negative refractive power, the second lens L2 has a positive refractive power, the third lens L3 has a positive refractive power, the fourth lens L4 has a positive refractive power, the fifth lens L5 has a positive refractive power, and the sixth lens L6 has a negative refractive power.

[0182] As Figure 15 shown, on the object side surface S1 of the first lens L1, it is convex near the optical axis O, and on the image side surface S2 of the first lens L1, it is concave near the optical axis O; on the object side surface S3 of the second lens L2, it is concave near the optical axis O, and on the image side surface S4 of the second lens L2, it is convex near the optical axis O; on the object side surface S5 of the third lens L3, it is concave near the optical axis O, and on the image side surface S6 of the third lens L3, it is convex near the optical axis O; on the object side surface S7 of the fourth lens L4, it is concave near the optical axis O, and on the image side surface S8 of the fourth lens L4, it is convex near the optical axis O; on the object side surface S9 of the fifth lens L5, it is convex near the optical axis O, and on the image side surface S10 of the fifth lens L5, it is convex near the optical axis O; on the object side surface S11 of the sixth lens L6, it is concave near the optical axis O, and on the image side surface S12 of the sixth lens L6, it is convex near the optical axis O.

[0183] Table 7a shows some parameters of the optical lens 300 in the seventh embodiment. The meanings of the parameters can be referred to Table 1a and will not be elaborated here.

[0184] In the seventh embodiment, both the object side surface S1 and the image side surface S2 of the first lens L1 are aspherical surfaces. Table 7b gives the conic constants k, and the higher-order term coefficients A4, A6, A8, A10, A12, A14, and A16 of the aspherical surfaces that can be used in the seventh embodiment. Among them, the aspherical surface profiles can be defined by the formulas given in the first embodiment.

[0185]

[0186]

[0187] Table 7a Some parameters of the optical lens in the seventh embodiment

[0188]

[0189] Table 7b Aspherical surface profile parameters of the optical lens in the seventh embodiment

[0190] Please refer to Figure 16, from Figure 16 From the spherical aberration curve diagram (A), the astigmatism diagram (B), and the distortion curve diagram (C) in Figure 16 , it can be seen that the spherical aberration, astigmatism, and distortion of the optical lens 300 are all well controlled. Therefore, the optical lens 300 of the seventh embodiment has good imaging quality. In addition, regarding Figure 16 in (A) of Figure 16 , Figure 16 in (B) of Figure 16 , and Figure 16 in (C) of Figure 16 , the wavelengths corresponding to the respective curves can refer to the content described in (A) of Figure 4 in the first embodiment. Figure 4 in (A) of Figure 4 , Figure 4 in (B) of Figure 4 , Figure 4 in (C) of Figure 4 . The details are not described herein again.

[0191] Table 8 shows the values of FOV, FNO, ImgH / F, FOV / FNO, TTL / ImgH, R1 / F, |R5 / R6|, (R7 - R8) / (R7 + R8), |F2 / F|, F3 / F, F5 / F, F56 / F, CT4 / ET4, CT5 / ET5, CT6 / ET6, SAGS1 / CT1, SAGS2 / CT1, F1 / CT1, SD1 / ImgH, SD1 / SD12, F123 / F456, CT5 / TTL, CT5 / CT6, F1 / F, F4 / F, F6 / F, |F2 / CT2|, F3 / CT3, F4 / CT4, F5 / CT5, F6 / CT6, R1 / R2, |R3 / R4|, |R7 / R8|, R9 / R10, R11 / R12 in the optical lens 300 of the first to seventh embodiments. These values can all satisfy the relational expressions described above.

[0192]

[0193]

[0194] Table 8 Partial parameters of the optical lens in the first to seventh embodiments

[0195] In the description of the embodiments of the present application, unless otherwise specified, "a plurality" means two or more.

[0196] The terms "first", "second", etc. are used only for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. The features defined with "first", "second" may explicitly or implicitly include one or more of such features.

[0197] The orientation terms mentioned in the embodiments of the present application, such as "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "side", "top", "bottom", etc., are only with reference to the directions of the attached drawings. This orientation term is for better and clearer description and understanding of the embodiments of the present application, rather than explicitly or implicitly indicating that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, etc. Therefore, it should not be construed as a limitation to the embodiments of the present application.

[0198] In the description of the embodiments of the present application, unless otherwise specified, "and / or" is only an association relationship describing associated objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0199] As mentioned above, it is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An optical lens, characterized in that, it includes six 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 refractive power; The third lens has positive refractive power; The fourth lens has positive refractive power. The image side surface of the fourth lens is convex near the optical axis; 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 convex near the optical axis; The sixth lens has negative refractive power. The object side surface of the sixth lens is concave near the optical axis, and the image side surface of the sixth lens is convex near the optical axis; The optical lens satisfies the following relational expressions: 110° ≤ FOV ≤ 125°, 2 ≤ FNO ≤ 2.4; wherein, FOV is the maximum field of view angle of the optical lens, and FNO is the f-number of the optical lens.

2. The optical lens according to claim 1, characterized in that, the optical lens satisfies the following relational expressions: 0.79 ≤ ImgH / F ≤ 1, and / or, 45° ≤ FOV / FNO ≤ 60°, and / or, 4.5 ≤ TTL / ImgH ≤ 8.1; wherein, ImgH is half of the image height corresponding to the maximum field of view angle of the optical lens, F is the effective focal length of the optical lens, FOV is the maximum field of view angle of the optical lens, FNO is the f-number of the optical lens, and TTL is the total optical length of the optical lens.

3. The optical lens according to claim 1, characterized in that, the optical lens satisfies the following relational expressions: 1.5 ≤ R1 / F ≤ 5, and / or, 0.3 ≤ |R5 / R6| ≤ 3.2, and / or, 0.3 ≤ (R7 - R8) / (R7 + R8) ≤ 1.1; wherein, R1 is the curvature radius of the object side surface of the first lens at the optical axis, R5 is the curvature radius of the object side surface of the third lens at the optical axis, R6 is the curvature radius of the image side surface of the third lens at the optical axis, R7 is the curvature radius of the object side surface of the fourth lens at the optical axis, R8 is the curvature radius of the image side surface of the fourth lens at the optical axis, and F is the effective focal length of the optical lens.

4. The optical lens according to claim 1, characterized in that, the optical lens satisfies the following relational expressions: 5 ≤ |F2 / F| ≤ 17, and / or, 2 ≤ F3 / F ≤ 22, and / or, 0.9 ≤ F5 / F ≤ 1.5, and / or, 2.3 ≤ F56 / F ≤ 3.6; wherein, F2 is the focal length of the second lens, F3 is the focal length of the third lens, F5 is the focal length of the fifth lens, F56 is the combined focal length of the fifth lens and the sixth lens, and F is the effective focal length of the optical lens.

5. The optical lens according to claim 1, characterized in that, the optical lens satisfies the following relational expressions: 0.65 ≤ CT4 / ET4 ≤ 1.3, and / or, 2 ≤ CT5 / ET5 ≤ 4.65, and / or, 0.5 ≤ CT6 / ET6 ≤ 0.85; Wherein, CT4 is the thickness of the fourth lens on the optical axis, CT5 is the thickness of the fifth lens on the optical axis, CT6 is the thickness of the sixth lens on the optical axis, ET4 is the distance on the optical axis from the maximum effective aperture of the object side of the fourth lens to the maximum effective aperture of the image side of the fourth lens, ET5 is the distance on the optical axis from the maximum effective aperture of the object side of the fifth lens to the maximum effective aperture of the image side of the fifth lens, and ET6 is the distance on the optical axis from the maximum effective aperture of the object side of the sixth lens to the maximum effective aperture of the image side of the sixth lens.

6. The optical lens according to claim 1, wherein the optical lens satisfies the following relational expressions: 0.05 ≤ SAGS1 / CT1 ≤ 0.65, and / or, 0.55 ≤ SAGS2 / CT1 ≤ 1.9, and / or, -5 ≤ F1 / CT1 ≤ -2; Wherein, SAGS1 is the sag height of the edge of the optical effective diameter of the object side of the first lens, CT1 is the thickness of the first lens on the optical axis, SAGS2 is the sag height of the edge of the optical effective diameter of the image side of the first lens, and F1 is the focal length of the first lens.

7. The optical lens according to claim 1, wherein the optical lens satisfies the following relational expressions: 1 ≤ SD1 / ImgH ≤ 1.65, and / or, 1.3 ≤ SD1 / SD12 ≤ 1.8; Wherein, SD1 is half of the maximum effective aperture of the object side of the first lens, SD12 is half of the maximum effective aperture of the image side of the sixth lens, and ImgH is half of the image height corresponding to the maximum field of view angle of the optical lens.

8. The optical lens according to claim 1, wherein the optical lens satisfies the following relational expressions: -3 ≤ F123 / F456 ≤ -1, the optical lens further includes a diaphragm, and the diaphragm is located between the third lens and the fourth lens, and / or, 9.7 ≤ TTL / CT5 ≤ 12.3, and / or, 0.7 ≤ CT5 / CT6 ≤ 1.7; Wherein, F123 is the combined focal length of the first lens, the second lens and the third lens, F456 is the combined focal length of the fourth lens, the fifth lens and the sixth lens, CT5 is the thickness of the fifth lens on the optical axis, CT6 is the thickness of the sixth lens on the optical axis, and TTL is the overall optical length of the optical lens.

9. An imaging module, characterized in that, The imaging module includes an image sensor chip and the 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, An apparatus including a main body and the imaging module according to claim 9, and the imaging module is disposed on the main body.

Images