Optical Lens, Camera Module and Electronic Device

Abstract

The present application discloses an optical lens, an imaging module, and an electronic device. The optical lens has a total of six lenses with refractive power, which sequentially include, from the object side to the image side along the optical axis: a first lens with refractive power; a second lens with positive refractive power, and both the object side surface and the image side surface are convex surfaces near the optical axis; a third lens with negative refractive power; a fourth lens with positive refractive power, and the object side surface and the image side surface are concave and convex surfaces respectively near the optical axis; a fifth lens with negative refractive power; a sixth lens with refractive power, and the object side surface and the image side surface are convex and concave surfaces respectively near the optical axis. The optical lens satisfies the relational expression: 0.7 mm < SD11 / tan(HFOV) < 1.1 mm, 45° < HFOV < 50°. The optical lens, the imaging module, and the electronic device provided by the present invention have a small head size and can achieve wide-angle shooting.

Description

Technical Field

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

[0002] In electronic devices (such as mobile phones, tablet computers, smart watches, etc.), in order to achieve the miniaturization of electronic devices and increase the screen-to-body ratio of electronic devices, the perforated screen has emerged. That is, mainly by setting small holes on the screen of the electronic device, the camera module is encapsulated in the small holes of the screen, which requires the optical lens of the camera module to have a small head aperture, a long head depth, and the ability to obtain a larger field of view, so as to improve the shooting quality of the mobile phone lens. Therefore, in order to meet the design of the perforated screen, there is an urgent need to provide an optical lens that can have a small head size and can achieve wide-angle shooting. Summary of the Invention

[0003] Embodiments of the present invention disclose an optical lens, a camera module, and an electronic device, which can have a small head size and can achieve wide-angle shooting.

[0004] To achieve the above object, in a first aspect, the present invention discloses an optical lens, which has a total of six lenses with refractive power, and sequentially includes, from the object side to the image side along the optical axis:

[0005] A first lens, having refractive power;

[0006] A second lens, having positive refractive power, and both the object side surface and the image side surface of the second lens are convex surfaces near the optical axis;

[0007] A third lens, having negative refractive power;

[0008] A fourth lens, having positive refractive power, the object side surface of the fourth lens is concave near the optical axis, and the image side surface of the fourth lens is convex near the optical axis;

[0009] A fifth lens, having negative refractive power;

[0010] A sixth lens, having refractive power, the object side surface of the sixth lens is convex near the optical axis, and the image side surface of the sixth lens is concave near the optical axis;

[0011] The optical lens satisfies the following relationship:

[0012] 0.7mm < SD11 / tan(HFOV) < 1.1mm, 45deg < HFOV < 50deg;

[0013] Wherein, HFOV is half of the maximum field of view angle of the optical lens, and SD11 is the maximum effective semi-aperture of the object side surface of the first lens.

[0014] By defining that the first lens of the optical lens has refractive power, that is, the first lens can have positive refractive power or negative refractive power. When the first lens has positive refractive power, as the first lens closest to the object side, it can facilitate the convergence of incident light, compress the total length of the optical lens, and increase the imaging surface of the optical lens; when the first lens has negative refractive power, it can help the light in the marginal field of view enter the optical lens evenly, increase the field of view angle of the optical lens, and make the imaging on the final imaging surface more uniform and clear. The second lens has positive refractive power. Combining the design that both its object side and image side are convex near the optical axis, it can balance the aberrations such as spherical aberration and chromatic aberration generated by the negative lens of the optical lens. The third lens has negative refractive power and can offset the aberrations such as spherical aberration and coma generated by the first lens or the second lens. The fourth lens has positive refractive power. Combining the design that its object side and image side are concave and convex respectively near the optical axis, on the one hand, it can improve and correct the aberrations such as distortion and field curvature of the optical lens, and on the other hand, it can reduce the middle thickness of the fourth lens, so that the overall thickness of the fourth lens is smaller, which is beneficial to the miniaturization design of the optical lens. The fifth lens has negative refractive power and can slow down the angle of light entering the imaging surface of the optical lens, thereby reducing the aberration generated by the optical lens and lowering the overall imaging sensitivity of the optical lens. The sixth lens has refractive power. Combining the design that its object side and image side are convex and concave respectively near the optical axis, it can make the light projected by the optical lens be better converged onto the imaging surface, improve the imaging resolution ability of the optical lens, and thus improve the imaging quality. At the same time, it can also reduce the middle thickness of the sixth lens, effectively shorten the total length of the optical lens, and is beneficial to the miniaturization design of the optical lens.

[0015] In addition, when the optical lens satisfies the relational expression 0.7mm < SD11 / tan(HFOV) < 1.1mm and 45deg < HFOV < 50deg, the optical lens can exhibit a larger field of view angle. An appropriate field of view angle is beneficial to the correction of the optical distortion of the optical lens, making the optical lens have a smaller TV distortion. At the same time, it can also realize the small-head feature of the optical lens, so that the optical lens can be adapted to the design of the hole-drilled screen, and improve the screen-to-body ratio when the optical lens is applied to electronic devices.

[0016] As an optional implementation manner, in the embodiment of the first aspect of the present invention, the aperture stop is located between the image side of the first lens and the object side of the second lens, and the optical lens satisfies the relational expression:

[0017] 1.0 < CT1 / T10 < 2.0;

[0018] Wherein, CT1 is the thickness of the first lens on the optical axis (i.e., the center thickness of the first lens), and T10 is the distance from the image side surface of the first lens to the diaphragm surface on the optical axis.

[0019] Considering that the first lens is the first lens surface closest to the object side, by defining the relationship between the center thickness of the first lens and the distance between the first lens and the diaphragm, that is, the adjustable center thickness of the first lens and the distance between the first lens and the diaphragm on the optical axis, it helps to compress the outer diameter of the first lens, making the head aperture size of the optical lens smaller, and at the same time is conducive to the compact arrangement of the overall structure of the optical lens, thus facilitating the realization of the miniaturized design of the optical lens.

[0020] As an optional implementation manner, in the embodiment of the first aspect of the present invention, the optical lens satisfies the following relational expression:

[0021] 1.5 < (CT1 + CT2) / (T12 + T23) < 3.5;

[0022] Wherein, CT1 is the thickness of the first lens on the optical axis (i.e., the center thickness of the first lens), CT2 is the thickness of the second lens on the optical axis (i.e., the center thickness of the second lens), T12 is the distance between the image side surface of the first lens and the object side surface of the second lens on the optical axis, and T23 is the distance between the second lens and the third lens on the optical axis.

[0023] When the above relationship is satisfied, sufficient space can be provided for assembling the three lenses (i.e., the first lens, the second lens, and the third lens), avoiding collisions between the first lens and the second lens or between the second lens and the third lens, thereby improving the assembly yield of the optical lens.

[0024] As an optional implementation manner, in the embodiment of the first aspect of the present invention, the optical lens satisfies the following relational expression:

[0025] 0.3 < ET4 / CT4 < 0.6;

[0026] Wherein, ET4 is the distance between the maximum effective semi-aperture of the object side surface of the fourth lens and the maximum effective semi-aperture of the image side surface of the fourth lens in the direction parallel to the optical axis (i.e., the edge thickness of the fourth lens), and CT4 is the thickness of the fourth lens on the optical axis (i.e., the center thickness of the fourth lens).

[0027] In this way, the overall thickness and shape of the fourth lens can be effectively controlled, that is, the shape and thickness-to-thickness ratio of the fourth lens can be controlled, and at the same time, the distortion generated by the optical lens can be balanced and corrected, improving the imaging quality of the optical lens.

[0028] As an alternative embodiment, in the embodiment of the first aspect of the present invention, the optical lens satisfies the following relational expression:

[0029] 0.4 < (f1 + f2) / (f1 - f2) < 1.6;

[0030] wherein, f1 is the focal length of the first lens, and f2 is the focal length of the second lens.

[0031] By reasonably configuring the ratio relationship of the focal lengths of the first lens and the second lens, the field of view angle of the optical lens can be effectively enlarged, and the wide-angle shooting function can be realized. At the same time, as the head lenses, the first lens and the second lens, defining the above relationship can also help to compress the total length of the optical lens, and realize the miniaturization and thinning design of the optical lens.

[0032] As an alternative embodiment, in the embodiment of the first aspect of the present invention, the optical lens satisfies the following relational expression:

[0033] 0 < R1 / R2 < 1.8;

[0034] wherein, R1 is the curvature radius of the object side surface of the first lens at the near optical axis, and R2 is the curvature radius of the image side surface of the first lens at the near optical axis.

[0035] When the above relationship is satisfied, that is, by adjusting the surface shape of the first lens, the refractive power of the first lens can be reasonably controlled, which helps to enlarge the field of view angle of the optical lens, realize the wide-angle shooting function, and at the same time can correct the spherical aberration of the optical lens. When the first lens has a positive refractive power, it can enhance the light-gathering ability of the optical lens, shorten the total length of the optical lens, and is beneficial to realizing the miniaturization design of the optical lens. When the first lens has a negative refractive power, it is beneficial to increase the field of view angle of the optical lens, so that the optical lens can obtain a larger field of view range.

[0036] As an alternative embodiment, in the embodiment of the first aspect of the present invention, the optical lens satisfies the following relational expression:

[0037] 1.0 < nd5 / nd4 < 1.3, and / or, 30 < v4 - v5 < 40;

[0038] wherein, nd4 is the refractive index of the fourth lens, nd5 is the refractive index of the fifth lens, v4 is the Abbe number of the fourth lens, and v5 is the Abbe number of the fifth lens.

[0039] By defining the relationship between the refractive indices and Abbe numbers of the fourth lens and the fifth lens, the deflection degree of light passing through the fourth lens and the fifth lens can be controlled, which is beneficial to strengthening the aberration correction ability of the fourth lens and the fifth lens, and can balance the chromatic aberration, thereby being beneficial to improving the imaging quality of the optical lens.

[0040] As an alternative embodiment, in the embodiment of the first aspect of the present invention, the optical lens satisfies the following relational expression:

[0041] 0.1 < f2 / f34 < 2.0;

[0042] Wherein, f2 is the focal length of the second lens, and f34 is the combined focal length of the third lens and the fourth lens.

[0043] For the second lens, the third lens, and the fourth lens that satisfy the above relationship, the refractive power distribution between the lenses can be balanced, the spherical aberration and chromatic aberration generated by the positive lens or negative lens of the optical lens can be corrected, so that the optical lens obtains good on-axis imaging quality.

[0044] As an alternative embodiment, in the embodiment of the first aspect of the present invention, the optical lens satisfies the following relational expression:

[0045] 1.3 < TTL / Imgh < 1.6;

[0046] Wherein, TTL is the distance between the object side of the first lens and the imaging surface of the optical lens on the optical axis, and Imgh is the radius of the maximum effective imaging circle of the optical lens.

[0047] When the above relational expression is satisfied, it can enable the optical lens to satisfy a large field of view angle, effectively control the size of the overall lens group of the optical lens, and have sufficient imaging size to increase the image brightness, thereby being beneficial to improving the imaging quality of the optical lens.

[0048] As an alternative embodiment, in the embodiment of the first aspect of the present invention, the optical lens satisfies the following relational expression:

[0049] -1.0 < (R4 + R5) / (R4 - R5) < -0.5;

[0050] Wherein, R4 is the curvature radius of the object side of the second lens near the optical axis, and R5 is the curvature radius of the image side of the second lens near the optical axis.

[0051] By adjusting the curvature radii of the object side and the image side of the second lens near the optical axis, the spherical aberration and chromatic aberration of the optical lens can be effectively corrected, thereby being beneficial to improving the imaging quality of the optical lens. In addition, the design that the object side and the image side of the second lens are convex near the optical axis is beneficial to reducing the optical sensitivity of the second lens, thereby improving the overall assembly yield of the optical lens.

[0052] Second aspect, the present invention discloses an imaging module, which includes an image sensor and an optical lens as described in the first aspect above. The image sensor is disposed on the image side of the optical lens. The imaging module with such an optical lens can have a small head size and achieve the effect of wide-angle shooting.

[0053] Third aspect, the present invention discloses an electronic device, which includes the imaging module as described in the second aspect above. The electronic device with such an imaging module can also have a small head size and achieve the effect of wide-angle shooting.

[0054] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0055] By defining that the first lens of the optical lens has refractive power, that is, the first lens can have positive refractive power or negative refractive power. When the first lens has positive refractive power, as the first lens closest to the object side, it is beneficial to the convergence of incident light, compress the total length of the optical lens, and increase the imaging surface of the optical lens. When the first lens has negative refractive power, it helps the light rays in the edge field of view to enter the optical lens evenly, increases the field of view angle of the optical lens, and makes the imaging on the final imaging surface more uniform and clear. The second lens has positive refractive power. Combining the design that both its object side and image side are convex near the optical axis can balance the aberrations such as spherical aberration and chromatic aberration generated by the negative lens of the optical lens. The third lens has negative refractive power and can offset the aberrations such as spherical aberration and coma generated by the first lens or the second lens. The fourth lens has positive refractive power. Combining the design that its object side and image side are concave and convex respectively near the optical axis can, on the one hand, improve and correct the aberrations such as distortion and field curvature of the optical lens, and on the other hand, reduce the middle thickness of the fourth lens, so that the overall thickness of the fourth lens is smaller, which is beneficial to the miniaturization design of the optical lens. The fifth lens has negative refractive power and can slow down the angle of the light rays entering the imaging surface of the optical lens, thereby reducing the aberrations generated by the optical lens and lowering the overall imaging sensitivity of the optical lens. The sixth lens has refractive power. Combining the design that its object side and image side are convex and concave respectively near the optical axis can make the light rays projected by the optical lens be better converged onto the imaging surface, improve the imaging resolution ability of the optical lens, and thus improve the imaging quality. At the same time, it can also reduce the middle thickness of the sixth lens, effectively shorten the total length of the optical lens, and is beneficial to the miniaturization design of the optical lens.

[0056] In addition, when the optical lens satisfies the relational expression 0.7mm < SD11 / tan(HFOV) < 1.1mm and 45deg < HFOV < 50deg, the optical lens can exhibit a relatively large field of view angle. A field of view angle of an appropriate size is conducive to correcting the optical distortion of the optical lens, enabling the optical lens to have a small TV distortion. At the same time, it can also realize the small head feature of the optical lens, enabling the optical lens to be adapted to the design with a high screen-to-body ratio. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0058] Figure 1 is a schematic structural diagram of the optical lens disclosed in Embodiment 1 of the present application;

[0059] Figure 2 is the longitudinal spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the optical lens disclosed in Embodiment 1 of the present application;

[0060] Figure 3 is a schematic structural diagram of the optical lens disclosed in Embodiment 2 of the present application;

[0061] Figure 4 is the longitudinal spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the optical lens disclosed in Embodiment 2 of the present application;

[0062] Figure 5 is a schematic structural diagram of the optical lens disclosed in Embodiment 3 of the present application;

[0063] Figure 6 is the longitudinal spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the optical lens disclosed in Embodiment 3 of the present application;

[0064] Figure 7 is a schematic structural diagram of the optical lens disclosed in Embodiment 4 of the present application;

[0065] Figure 8 is the longitudinal spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the optical lens disclosed in Embodiment 4 of the present application;

[0066] Figure 9 is a schematic structural diagram of the optical lens disclosed in Embodiment 5 of the present application;

[0067] Figure 10It is the longitudinal spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the optical lens disclosed in Embodiment 5 of the present application;

[0068] Figure 11 It is the structural schematic diagram of the optical lens disclosed in Embodiment 6 of the present application;

[0069] Figure 12 It is the longitudinal spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the optical lens disclosed in Embodiment 6 of the present application;

[0070] Figure 13 It is the structural schematic diagram of the optical lens disclosed in Embodiment 7 of the present application;

[0071] Figure 14 It is the longitudinal spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the optical lens disclosed in Embodiment 7 of the present application;

[0072] Figure 15 It is the structural schematic diagram of the imaging module disclosed in the present application;

[0073] Figure 16 It is the structural schematic diagram of the electronic device disclosed in the present application. Specific Embodiments

[0074] The technical solutions of the present invention will be further described below in conjunction with the embodiments and the accompanying drawings.

[0075] Please refer to Figure 1 , according to the first aspect of the present application, the present application discloses an optical lens 100. The optical lens 100 has a total of six lenses with refractive power, including a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a sixth lens L6, which are sequentially arranged from the object side to the image side along the optical axis O. When 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 101 of the optical lens 100. Among them, the first lens L1 has positive or negative refractive power, the second lens L2 has positive refractive power, the third lens L3 has negative refractive power, the fourth lens L4 has positive refractive power, the fifth lens L5 has negative refractive power, and the sixth lens L6 has positive or negative refractive power.

[0076] Further, the object side surface 11 of the first lens L1 is convex or concave near the optical axis O, and the image side surface 12 of the first lens L1 is concave or convex near the optical axis O; the object side surface 21 of the second lens L2 is convex near the optical axis O, and the image side surface 22 of the second lens L2 is convex near the optical axis O; the object side surface 31 of the third lens L3 is concave or convex near the optical axis O, and the image side surface 32 of the third lens L3 is convex or concave near the optical axis O; the object side surface 41 of the fourth lens L4 is concave near the optical axis O, and the image side surface 42 of the fourth lens L4 is convex near the optical axis O; the object side surface 51 of the fifth lens L5 is concave or convex near the optical axis O, and the image side surface 52 of the fifth lens L5 is concave or convex near the optical axis O; the object side surface 61 of the sixth lens L6 is convex near the optical axis O, and the image side surface 62 of the sixth lens L6 is concave near the optical axis O.

[0077] By reasonably configuring the surface types and refractive powers of the lenses between the first lens L1 and the sixth lens L6, the optical lens 100 can meet the requirements of a small head and miniaturization design to adapt to electronic devices with a high screen ratio, and at the same time, it can also have the function of wide-angle shooting.

[0078] Further, in some embodiments, 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 plastics. At this time, the optical lens 100 can reduce weight and cost. In other embodiments, 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 also be glass. At this time, the optical lens 100 can have good optical effects, and at the same time, the temperature drift sensitivity of the optical lens 100 can also be reduced.

[0079] In some embodiments, in order to facilitate processing and molding, the above-mentioned first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, and sixth lens L6 can all be aspherical lenses. It can be understood that in other embodiments, the above-mentioned first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, and sixth lens L6 can also use spherical lenses.

[0080] In some embodiments, the optical lens 100 further includes a stop STO, which can be an aperture stop and / or a field stop. For example, the stop STO can be an aperture stop, or the stop STO can be a field stop, or the stop STO can be both an aperture stop and a field stop. By disposing the stop STO between the image side 12 of the first lens L1 and the object side 21 of the second lens L2, the exit pupil can be moved away from the imaging surface 101, and the effective diameter of the optical lens 100 can be reduced without reducing the telecentricity of the optical lens 100, thereby achieving miniaturization. It can be understood that in other embodiments, the stop STO can also be disposed between the second lens L2 and the third lens L3, and the setting can be adjusted according to actual conditions, and this embodiment does not make specific limitations thereon.

[0081] In some embodiments, the optical lens 100 further includes an infrared filter 70, which is disposed between the sixth lens L6 and the imaging surface 101 of the optical lens 100. By selecting the infrared filter 70, infrared light can be filtered out, making the imaging more in line with the visual experience of the human eye, thereby improving the imaging quality. It can be understood that the infrared filter 70 can be made of plastic, or made of optical glass coating, or an infrared filter of other materials, and can be selected according to actual needs, and this embodiment does not make specific limitations thereon.

[0082] In some embodiments, the optical lens 100 satisfies the following relationship: 0.7mm < SD11 / tan(HFOV) < 1.1mm, 45deg < HFOV < 50deg. Wherein, HFOV is half of the maximum field of view angle of the optical lens 100, and SD11 is the maximum effective semi-aperture of the object side 11 of the first lens L1.

[0083] When the optical lens 100 satisfies the relationship 0.7mm < SD11 / tan(HFOV) < 1.1mm, 45deg < HFOV < 50deg, the optical lens 100 can exhibit a relatively large field of view angle. An appropriate field of view angle is beneficial to the correction of the optical distortion of the optical lens 100, making the optical lens 100 have a small TV distortion. At the same time, it can also realize the small head feature of the optical lens 100, so that the optical lens 100 can be adapted to the design of the perforated screen, and improve the screen-to-body ratio when the optical lens is applied to an electronic device.

[0084] When SD11 / tan(HFOV) < 0.7 mm, the maximum effective semi-aperture of the object side 11 of the first lens L1 is too small, which is not conducive to the entry of light and the correction of the aberration of the optical lens 100, resulting in insufficient relative brightness at the edge of the optical lens 100 and affecting the imaging quality. When SD11 / tan(HFOV) > 1.1 mm, the maximum effective semi-aperture of the object side 11 of the first lens L1 is too large, which makes it difficult to realize the small head design of the optical lens 100, is not conducive to the packaging of the optical lens 100 under the perforated screen, and further makes it difficult for the optical lens 100 to adapt to the perforated screen design with a high screen-to-body ratio.

[0085] In some embodiments, as can be seen from the foregoing, the stop STO is located between the image side 12 of the first lens L1 and the object side 21 of the second lens L2, and the optical lens 100 satisfies the following relational expression: 1.0 < CT1 / T10 < 2.0; where CT1 is the thickness of the first lens L1 on the optical axis O, and T10 is the distance from the image side 12 of the first lens L1 to the surface of the stop STO on the optical axis O.

[0086] Considering that the first lens L1 is the first lens closest to the object side, by defining the relationship between the center thickness of the first lens L1 and the distance between the first lens L1 and the stop STO, that is, the adjustable center thickness of the first lens L1 and the distance between the first lens L1 and the stop STO on the optical axis O, it helps to compress the outer diameter size of the first lens L1, make the head aperture size of the optical lens 100 smaller, and at the same time is conducive to the compact arrangement of the overall structure of the optical lens 100, thereby facilitating the realization of the miniaturized design of the optical lens 100.

[0087] In some embodiments, the optical lens 100 satisfies the following relational expression: 1.5 < (CT1 + CT2) / (T12 + T23) < 3.5; where CT2 is the thickness of the second lens L2 on the optical axis O (i.e., the center thickness of the second lens L2), T12 is the distance between the first lens L1 and the second lens L2 on the optical axis O, and T23 is the distance between the image side 22 of the second lens L2 and the object side 31 of the third lens L3 on the optical axis O.

[0088] When the above relationships are satisfied, there is sufficient space for assembling the three lenses (i.e., the first lens L1, the second lens L2, and the third lens L3), avoiding collisions between the first lens L1 and the second lens L2 or between the second lens L2 and the third lens L3, thereby improving the assembly yield of the optical lens 100. When (CT1 + CT2) / (T12 + T23) < 1.5, the center thickness of the second lens L2 is too thin, which is not conducive to increasing the head depth of the optical lens 100. When (CT1 + CT2) / (T12 + T23) > 3.5, the center thickness of the second lens L2 is too thick, which is not conducive to compressing the overall volume of the optical lens 100, resulting in difficulties in aberration correction. At the same time, there may also be a risk of interference in lens assembly due to too small an air gap between the lenses, affecting the assembly yield of the optical lens 100.

[0089] In some embodiments, the optical lens 100 satisfies the following relational expression: 0.3 < ET4 / CT4 < 0.6; where ET4 is the distance in the direction parallel to the optical axis from the maximum effective semi-aperture of the object side 41 of the fourth lens L4 to the maximum effective semi-aperture of the image side 42 of the fourth lens L4 (i.e., the edge thickness of the fourth lens L4), and CT4 is the thickness of the fourth lens L4 on the optical axis O (i.e., the center thickness of the fourth lens L4).

[0090] In this way, the overall thickness and shape of the fourth lens L4 can be effectively controlled, that is, the shape and thickness ratio of the fourth lens L4 can be controlled. At the same time, it can also balance and correct the distortion generated by the optical lens 100, improving the imaging quality of the optical lens 100. When ET4 / CT4 < 0.3, the thickness ratio of the fourth lens L4 is uneven, resulting in difficulties in forming the fourth lens L4. When ET4 / CT4 > 0.50, the surface shape of the fourth lens L4 is too flat, easily leading to insufficient space for correcting the distortion aberration of the optical lens 100, affecting the imaging quality of the optical lens 100.

[0091] In some embodiments, the optical lens 100 satisfies the following relational expression: 0.4 < (f1 + f2) / (f1 - f2) < 1.6; where f1 is the focal length of the first lens L1 and f2 is the focal length of the second lens L2. By reasonably configuring the ratio relationship of the focal lengths of the first lens L1 and the second lens L2, the field of view angle of the optical lens 100 can be effectively expanded, realizing the wide-angle shooting function. At the same time, as the head lenses, the first lens L1 and the second lens L2, defining the above relationship can also be conducive to compressing the total length of the optical lens 100, realizing the miniaturization and thinning design of the optical lens 100.

[0092] In some embodiments, the optical lens 100 satisfies the following relational expression: 0 < R1 / R2 < 1.8; where R1 is the radius of curvature of the object side 11 of the first lens L1 at the near optical axis, and R2 is the radius of curvature of the image side 12 of the first lens L1 at the near optical axis.

[0093] By adjusting the surface shape of the first lens L1, the refractive power of the first lens L1 can be reasonably controlled, which helps to expand the field of view angle of the optical lens 100, achieve the wide-angle shooting function, and at the same time can also correct the spherical aberration of the optical lens 100. When the first lens L1 has a positive refractive power, it can enhance the ability of the optical lens 100 to collect light, shorten the total length of the optical lens 100, and is beneficial to realizing the miniaturized design of the optical lens 100. When the first lens L1 has a negative refractive power, it is beneficial to increase the field of view angle of the optical lens 100, so that the optical lens 100 can obtain a larger field of view range.

[0094] In some embodiments, the optical lens 100 satisfies the following relationship: 1.0 < nd5 / nd4 < 1.3, and / or, 30 < v4 - v5 < 40; where, nd4 is the refractive index of the fourth lens L4, nd5 is the refractive index of the fifth lens L5, v4 is the Abbe number of the fourth lens L4, and v5 is the Abbe number of the fifth lens L5. By defining the relationship between the refractive indices and Abbe numbers of the fourth lens L4 and the fifth lens L5, the degree of deflection of light passing through the fourth lens L4 and the fifth lens L5 can be controlled, which is beneficial to strengthening the aberration correction ability of the fourth lens L4 and the fifth lens L5 and balancing chromatic aberration, thereby being beneficial to improving the imaging quality of the optical lens 100.

[0095] In some embodiments, the optical lens 100 satisfies the following relationship: 0.1 < f2 / f34 < 2.0; where, f2 is the focal length of the second lens L2, and f34 is the combined focal length of the third lens L3 and the fourth lens L4.

[0096] The second lens L2, the third lens L3, and the fourth lens L4 that satisfy the above relationship can balance the distribution of refractive power between the lenses, correct the spherical aberration generated by the positive or negative lens of the optical lens 100, and enable the optical lens 100 to obtain good on-axis imaging quality. At the same time, the object side surfaces of the third lens L3 and the fourth lens L4 are bent towards the second lens L2 at the circumference, which can adjust the traveling direction of light and slow down the light deflection angle.

[0097] In some embodiments, the optical lens 100 satisfies the following relationship: 1.3 < TTL / Imgh < 1.6; where, TTL is the distance between the object side surface 11 of the first lens L1 and the imaging surface 101 of the optical lens 100 on the optical axis, and Imgh is the radius of the maximum effective imaging circle of the optical lens 100.

[0098] When the above relationship is satisfied, the optical lens 100 can satisfy the large field of view angle, effectively control the size of the overall lens group of the optical lens 100, and have sufficient imaging size to increase the image brightness, thereby being beneficial to improving the imaging quality of the optical lens 100.

[0099] In some embodiments, the optical lens 100 satisfies the following relational expression: -1.0 < (R4 + R5) / (R4 - R5) < -0.5; where R4 is the radius of curvature of the object side 21 of the second lens L2 at the near optical axis, and R5 is the radius of curvature of the image side 22 of the second lens L2 at the near optical axis.

[0100] By adjusting the radii of curvature of the object side 21 and the image side 22 of the second lens L2 at the near optical axis, the spherical aberration and chromatic aberration of the optical lens 100 can be effectively corrected, thereby facilitating the improvement of the imaging quality of the optical lens 100. In addition, the design of the object side 21 and the image side 22 of the second lens L2 being convex at the near optical axis is conducive to reducing the optical sensitivity of the second lens L2, thereby improving the overall assembly yield of the optical lens 100.

[0101] In some embodiments, as can be seen from the foregoing, the object side and the image side of any one of the first lens L1 to the sixth lens L6 are aspherical surfaces, and the surface profiles of the aspherical lenses can be defined by, but not limited to, the following aspherical formula:

[0102]

[0103] where Z is the distance from a corresponding point on the aspherical surface to the plane tangent to the surface vertex, r is the distance from any point on the aspherical surface to the optical axis, c is the curvature of the aspherical surface vertex, c = 1 / Y, Y is the radius of curvature (i.e., the paraxial curvature c is the reciprocal of the Y radius in Table 1), k is the conic constant, and Ai is the coefficient corresponding to the i-th high-order term in the aspherical surface profile formula.

[0104] The optical lens 100 of this embodiment will be described in detail below in conjunction with specific parameters.

[0105] Embodiment 1

[0106] The structural schematic diagram of the optical lens 100 disclosed in Embodiment 1 of the present application is as Figure 1 shown. The optical lens 100 includes a first lens L1, a stop STO, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and an infrared filter 70 arranged in sequence from the object side to the image side along the optical axis O. Among them, for 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, reference can be made to the above specific embodiments, and details will not be repeated here.

[0107] Furthermore, the first lens L1 has a negative refractive power, the second lens L2 has a positive refractive power, the third lens L3 has a negative refractive power, the fourth lens L4 has a positive refractive power, the fifth lens L5 has a negative refractive power, and the sixth lens L6 has a negative refractive power.

[0108] Furthermore, the object side surface 11 and the image side surface 12 of the first lens L1 are a convex surface and a concave surface respectively at the near optical axis O; the object side surface 21 and the image side surface 22 of the second lens L2 are both convex surfaces at the near optical axis O; the object side surface 31 and the image side surface 32 of the third lens L3 are a concave surface and a convex surface respectively at the near optical axis O; the object side surface 41 and the image side surface 42 of the fourth lens L4 are a concave surface and a convex surface respectively at the near optical axis O; the object side surface 51 and the image side surface 52 of the fifth lens L5 are both concave surfaces at the near optical axis O; the object side surface 61 and the image side surface 62 of the sixth lens L6 are a convex surface and a concave surface respectively at the near optical axis O.

[0109] Specifically, taking the focal length f = 2.81 mm of the optical lens 100, the aperture number FNO = 2.15 of the optical lens 100, half of the maximum field of view angle HFOV = 46.5 deg of the optical lens 100, and the total length TTL = 4.516 mm of the optical lens 100 as an example, the other parameters of the optical lens 100 are given in Table 1 below. Among them, the components along the optical axis O of the optical lens 100 from the object side to the image side are arranged in the order of the components from top to bottom in Table 1. In the same lens, the surface with a smaller surface number is the object side surface of the lens, and the surface with a larger surface number is the image side surface of the lens. For example, surface numbers 1 and 2 correspond to the object side surface and the image side surface of the first lens L1 respectively. The Y radius in Table 1 is the radius of curvature of the corresponding object side surface or image side surface at the optical axis O. The first value in the "thickness" parameter column of the lens is the thickness of the lens on the optical axis O, and the second value is the distance from the image side surface of the lens to the next surface on the optical axis O. The value in the "thickness" parameter column of the aperture stop STO is the distance from the aperture stop STO to the vertex of the next surface (the vertex refers to the intersection of the surface and the optical axis O) on the optical axis O. By default, the direction from the object side surface of the first lens L1 to the image side surface of the last lens is the positive direction of the optical axis O. When this value is negative, it indicates that the aperture stop STO is set on the image side of the vertex of the next surface. If the thickness of the aperture stop STO is positive, the aperture stop STO is on the object side of the vertex of the next surface. It can be understood that the units of the Y radius, thickness, and focal length in Table 1 are all mm, and the refractive index, Abbe number, and focal length in Table 1 are all obtained under the reference wavelength of 587.5618 nm.

[0110] The k in Table 2 is the conic constant, and Table 2 gives the higher-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 that can be used for each aspherical mirror surface in the first embodiment. Among them, for the fifth lens, the higher-order term coefficients A22, A24, A26, A28, and A30 are also given.

[0111] Table 1

[0112]

[0113]

[0114] Table 2

[0115]

[0116]

[0117] Please refer to Figure 2 (A) in Figure 2 (A) in shows the longitudinal spherical aberration diagrams of the optical lens 100 in the first embodiment at wavelengths of 656.2725 nm, 587.5618 nm, and 486.1327 nm. Figure 2 In (A), the abscissa along the X-axis represents the focus shift in mm, and the ordinate along the Y-axis represents the normalized field of view. From Figure 2 (A), it can be seen that the spherical aberration value of the optical lens 100 in the first embodiment is relatively good, indicating that the imaging quality of the optical lens 100 in this embodiment is relatively good.

[0118] Please refer to Figure 2 (B) in Figure 2 (B) is the astigmatism curve diagram of the optical lens 100 in the first embodiment at a wavelength of 587.5618 nm. Among them, the abscissa along the X-axis represents the focus shift, and the ordinate along the Y-axis represents the image height in mm. In the astigmatism curve diagram, T represents the curvature of the imaging surface 101 in the meridian direction, and S represents the curvature of the imaging surface 101 in the sagittal direction. From Figure 2 (B), it can be seen that at this wavelength, the astigmatism of the optical lens 100 is well compensated.

[0119] Please refer to Figure 2 (C) in Figure 2 (C) is the distortion curve diagram of the optical lens 100 in the first embodiment at a wavelength of 587.5618 nm. Among them, the abscissa along the X-axis represents the distortion in %, and the ordinate along the Y-axis represents the image height in mm. From Figure 2 (C), it can be seen that at this wavelength, the distortion of the optical lens 100 is well corrected.

[0120] The second embodiment

[0121] The structural schematic diagram of the optical lens 100 disclosed in the second embodiment of the present application is as shown in Figure 3As shown in the figure, the optical lens 100 includes a first lens L1, a stop STO, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and an infrared filter 70, which are sequentially arranged from the object side to the image side along the optical axis O. Among them, for 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, reference can be made to the specific embodiments described above, and details will not be elaborated here.

[0122] Further, the first lens L1 has a negative refractive power, the second lens L2 has a positive refractive power, the third lens L3 has a negative refractive power, the fourth lens L4 has a positive refractive power, the fifth lens L5 has a negative refractive power, and the sixth lens L6 has a negative refractive power.

[0123] Further, the object side surface 11 and the image side surface 12 of the first lens L1 are convex and concave surfaces respectively near the optical axis O; the object side surface 21 and the image side surface 22 of the second lens L2 are both convex surfaces near the optical axis O; the object side surface 31 and the image side surface 32 of the third lens L3 are both concave surfaces near the optical axis O; the object side surface 41 and the image side surface 42 of the fourth lens L4 are concave and convex surfaces respectively near the optical axis O; the object side surface 51 and the image side surface 52 of the fifth lens L5 are convex and concave surfaces respectively near the optical axis O; the object side surface 61 and the image side surface 62 of the sixth lens L6 are convex and concave surfaces respectively near the optical axis O.

[0124] The other parameters in the second embodiment are given in Table 3 below, and the definitions of the parameters can be obtained from the descriptions of the foregoing embodiments, and details will not be elaborated here. It can be understood that the units of the Y radius, thickness, and focal length in Table 3 are all mm, and the refractive index, Abbe number, and focal length in Table 3 are all obtained under the reference wavelength of 587.5618 nm.

[0125] The k in Table 4 is the conic constant, and Table 4 gives the higher-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 for each aspherical mirror surface in the second embodiment. Among them, for the fifth lens, the higher-order term coefficients A22, A24, A26, A28, and A30 are also given.

[0126] Table 3

[0127]

[0128]

[0129] Table 4

[0130]

[0131]

[0132] Please refer toFigure 4 , from Figure 4 the (A) longitudinal spherical aberration diagram in Figure 4 the (B) astigmatism curve diagram in Figure 4 and the (C) distortion curve diagram in , it can be seen that the longitudinal spherical aberration, astigmatism and distortion of the optical lens 100 are all well controlled, so that the optical lens 100 of this embodiment has good imaging quality. In addition, regarding Figure 4 the (A) in Figure 4 the (B) in Figure 4 and the wavelengths corresponding to the curves in the (C) in , reference can be made to the content described in the (A), (B), and (C) in Embodiment 1, which will not be elaborated here. Figure 2 the (A) in Figure 2 the (B) in Figure 2 the (C) in

[0133] Embodiment 3

[0134] The structural schematic diagram of the optical lens 100 disclosed in Embodiment 3 of the present application is as shown in Figure 5 . The optical lens 100 includes a first lens L1, a stop STO, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and an infrared filter 70, which are sequentially arranged from the object side to the image side along the optical axis O. Among them, regarding 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, reference can be made to the above specific implementation manners, which will not be elaborated here.

[0135] Further, the first lens L1 has a negative refractive power, the second lens L2 has a positive refractive power, the third lens L3 has a negative refractive power, the fourth lens L4 has a positive refractive power, the fifth lens L5 has a negative refractive power, and the sixth lens L6 has a negative refractive power.

[0136] Further, the object side surface 11 and the image side surface 12 of the first lens L1 are convex and concave respectively near the optical axis O; the object side surface 21 and the image side surface 22 of the second lens L2 are both convex near the optical axis O; the object side surface 31 and the image side surface 32 of the third lens L3 are both concave near the optical axis O; the object side surface 41 and the image side surface 42 of the fourth lens L4 are concave and convex respectively near the optical axis O; the object side surface 51 and the image side surface 52 of the fifth lens L5 are convex and concave respectively near the optical axis O; the object side surface 61 and the image side surface 62 of the sixth lens L6 are convex and concave respectively near the optical axis O.

[0137] The other parameters in the third embodiment are given in Table 5 below, and the definitions of the parameters can be obtained from the descriptions of the foregoing embodiments, and will not be elaborated here. It can be understood that the units of the Y radius, thickness, and focal length in Table 5 are all mm, and the refractive index, Abbe number, and focal length in Table 5 are all obtained at the reference wavelength of 587.5618 nm.

[0138] In Table 6, k is the conic constant, and Table 6 gives the higher-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 for each aspherical mirror surface in the third embodiment. For the fifth lens, the higher-order term coefficients A22, A24, A26, A28, and A30 are also given.

[0139] Table 5

[0140]

[0141]

[0142] Table 6

[0143]

[0144]

[0145] Please refer to Figure 6 , from Figure 6 the (A) longitudinal spherical aberration diagram in Figure 6 the (B) astigmatism curve diagram in Figure 6 and the (C) distortion curve diagram in Figure 6 it can be seen that the longitudinal spherical aberration, astigmatism, and distortion of the optical lens 100 are all well controlled, so that the optical lens 100 in this embodiment has good imaging quality. In addition, regarding Figure 6 the (A) in Figure 6 the (B) in Figure 2 and the (C) in Figure 2 the wavelengths corresponding to the respective curves can refer to the content described in the (A) in Figure 2 the (B) in

[0146] Embodiment Four

[0147] The structural schematic diagram of the optical lens 100 disclosed in Embodiment Four of the present application is as shown in Figure 7As shown, the optical lens 100 includes a first lens L1, a stop STO, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and an infrared filter 70, which are sequentially arranged from the object side to the image side along the optical axis O. Among them, for 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, reference can be made to the specific embodiments described above, and details will not be elaborated here.

[0148] Further, the first lens L1 has a negative refractive power, the second lens L2 has a positive refractive power, the third lens L3 has a negative refractive power, the fourth lens L4 has a positive refractive power, the fifth lens L5 has a negative refractive power, and the sixth lens L6 has a negative refractive power.

[0149] Further, the object side surface 11 and the image side surface 12 of the first lens L1 are convex and concave respectively near the optical axis O; the object side surface 21 and the image side surface 22 of the second lens L2 are both convex near the optical axis O; the object side surface 31 and the image side surface 32 of the third lens L3 are convex and concave respectively near the optical axis O; the object side surface 41 and the image side surface 42 of the fourth lens L4 are concave and convex respectively near the optical axis O; the object side surface 51 and the image side surface 52 of the fifth lens L5 are concave and convex respectively near the optical axis O; the object side surface 61 and the image side surface 62 of the sixth lens L6 are convex and concave respectively near the optical axis O.

[0150] The other parameters in the fourth embodiment are given in Table 7 below, and the definitions of the parameters can be obtained from the descriptions of the foregoing embodiments, and details will not be elaborated here. It can be understood that the units of the Y radius, thickness, and focal length in Table 7 are all mm, and the refractive index, Abbe number, and focal length in Table 7 are all obtained under the reference wavelength of 587.5618 nm.

[0151] In Table 8, k is the conic constant, and Table 8 gives the higher-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 for each aspherical mirror surface in the fourth embodiment. Among them, for the fifth lens, the higher-order term coefficients A22, A24, A26, A28, and A30 are also given.

[0152] Table 7

[0153]

[0154]

[0155] Table 8

[0156]

[0157]

[0158] Please refer toFigure 8 , from Figure 8 the (A) longitudinal spherical aberration diagram in Figure 8 the (B) astigmatism curve diagram in Figure 8 and the (C) distortion curve diagram in Figure 8 (A) in Figure 8 (B) in Figure 8 and (C) in Figure 2 (A) in Figure 2 (B) in Figure 2 (C) in

[0159] Embodiment Five

[0160] The structural schematic diagram of the optical lens 100 disclosed in Embodiment Five of the present application is as shown in Figure 9 The optical lens 100 includes a first lens L1, a stop STO, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and an infrared filter 70, which are sequentially arranged from the object side to the image side along the optical axis O. Among them, 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 referred to the above specific embodiments and will not be elaborated here.

[0161] Further, the first lens L1 has a positive refractive power, the second lens L2 has a positive refractive power, the third lens L3 has a negative refractive power, the fourth lens L4 has a positive refractive power, the fifth lens L5 has a negative refractive power, and the sixth lens L6 has a positive refractive power.

[0162] Further, the object side surface 11 and the image side surface 12 of the first lens L1 are convex and concave respectively near the optical axis O; the object side surface 21 and the image side surface 22 of the second lens L2 are both convex near the optical axis O; the object side surface 31 and the image side surface 32 of the third lens L3 are convex and concave respectively near the optical axis O; the object side surface 41 and the image side surface 42 of the fourth lens L4 are concave and convex respectively near the optical axis O; the object side surface 51 and the image side surface 52 of the fifth lens L5 are concave and convex respectively near the optical axis O; the object side surface 61 and the image side surface 62 of the sixth lens L6 are convex and concave respectively near the optical axis O.

[0163] The other parameters in the fifth embodiment are given in Table 9 below, and the definitions of the parameters can be obtained from the descriptions of the foregoing embodiments, which will not be elaborated here. It can be understood that the units of the Y radius, thickness, and focal length in Table 9 are all mm, and the refractive index, Abbe number, and focal length in Table 9 are all obtained under the reference wavelength of 587.5618 nm.

[0164] In Table 10, k is the conic constant, and Table 10 gives the higher-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 for each aspherical mirror surface in the fifth embodiment. Among them, for the fifth lens and the sixth lens, the higher-order term coefficients A22, A24, A26, A28, and A30 are also given.

[0165] Table 9

[0166]

[0167]

[0168] Table 10

[0169]

[0170]

[0171] Please refer to Figure 10 , from Figure 10 the (A) longitudinal spherical aberration diagram in Figure 10 the (B) astigmatism curve diagram in Figure 10 and the (C) distortion curve diagram in Figure 10 it can be seen that the longitudinal spherical aberration, astigmatism, and distortion of the optical lens 100 are all well controlled, so that the optical lens 100 in this embodiment has good imaging quality. In addition, regarding Figure 10 the (A) in Figure 10 the (B) in Figure 2 and the (C) in Figure 2 the wavelengths corresponding to the respective curves can refer to the content described in Figure 2 the (A),

[0172] Embodiment Six

[0173] The structural schematic diagram of the optical lens 100 disclosed in Embodiment Six of the present application is as shown in Figure 11As shown, the optical lens 100 includes a first lens L1, a stop STO, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and an infrared filter 70, which are sequentially arranged from the object side to the image side along the optical axis O. Among them, for 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, reference can be made to the specific embodiments described above, and details will not be elaborated here.

[0174] Further, the first lens L1 has a positive refractive power, the second lens L2 has a positive refractive power, the third lens L3 has a negative refractive power, the fourth lens L4 has a positive refractive power, the fifth lens L5 has a negative refractive power, and the sixth lens L6 has a positive refractive power.

[0175] Further, the object side surface 11 and the image side surface 12 of the first lens L1 are convex and concave, respectively, near the optical axis O; the object side surface 21 and the image side surface 22 of the second lens L2 are both convex near the optical axis O; the object side surface 31 and the image side surface 32 of the third lens L3 are concave and convex, respectively, near the optical axis O; the object side surface 41 and the image side surface 42 of the fourth lens L4 are concave and convex, respectively, near the optical axis O; the object side surface 51 and the image side surface 52 of the fifth lens L5 are concave and convex, respectively, near the optical axis O; the object side surface 61 and the image side surface 62 of the sixth lens L6 are convex and concave, respectively, near the optical axis O.

[0176] The other parameters in this Embodiment 6 are given in Table 11 below, and the definitions of the parameters can be obtained from the descriptions of the foregoing embodiments, and details will not be elaborated here. It can be understood that the units of the Y radius, thickness, and focal length in Table 11 are all mm, and the refractive index, Abbe number, and focal length in Table 11 are all obtained under the reference wavelength of 587.5618 nm.

[0177] In Table 12, k is the conic constant, and Table 12 gives the higher-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 for each aspherical mirror surface in Embodiment 6. Among them, for the fifth lens and the sixth lens, the higher-order term coefficients A22, A24, A26, A28, and A30 are also given.

[0178] Table 11

[0179]

[0180]

[0181] Table 12

[0182]

[0183]

[0184] Please refer to Figure 12 , from the (A) longitudinal spherical aberration diagram in Figure 12 , the (B) astigmatism curve diagram in Figure 12 and the (C) distortion curve diagram in Figure 12 , it can be seen that the longitudinal spherical aberration, astigmatism and distortion of the optical lens 100 are all well controlled, so that the optical lens 100 of this 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 10 , reference can be made to the content described in (A) in Embodiment 1 regarding Figure 2 , (B) in Figure 2 and (C) in Figure 2 , which will not be elaborated here.

[0185] Embodiment 7

[0186] The structural schematic diagram of the optical lens 100 disclosed in Embodiment 7 of the present application is as shown in Figure 13 . The optical lens 100 includes a first lens L1, a stop STO, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6 and an infrared filter 70, which are sequentially arranged from the object side to the image side along the optical axis O. Among them, regarding 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, reference can be made to the above specific embodiments, which will not be elaborated here.

[0187] Furthermore, the first lens L1 has a positive refractive power, the second lens L2 has a positive refractive power, the third lens L3 has a negative refractive power, the fourth lens L4 has a positive refractive power, the fifth lens L5 has a negative refractive power, and the sixth lens L6 has a positive refractive power.

[0188] Furthermore, the object side surface 11 and the image side surface 12 of the first lens L1 are concave and convex respectively near the optical axis O; the object side surface 21 and the image side surface 22 of the second lens L2 are both convex near the optical axis O; the object side surface 31 and the image side surface 32 of the third lens L3 are convex and concave respectively near the optical axis O; the object side surface 41 and the image side surface 42 of the fourth lens L4 are concave and convex respectively near the optical axis O; the object side surface 51 and the image side surface 52 of the fifth lens L5 are concave and convex respectively near the optical axis O; the object side surface 61 and the image side surface 62 of the sixth lens L6 are convex and concave respectively near the optical axis O.

[0189] The other parameters in the seventh embodiment are given in Table 13 below, and the definitions of the parameters can be obtained from the descriptions of the foregoing embodiments, which will not be elaborated here. It can be understood that the units of the Y radius, thickness, and focal length in Table 13 are all mm, and the refractive index, Abbe number, and focal length in Table 13 are all obtained at the reference wavelength of 587.5618 nm.

[0190] In Table 14, k is the conic constant, and Table 14 gives the higher-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 for each aspherical mirror surface in the seventh embodiment. Among them, for the fifth lens and the sixth lens, the higher-order term coefficients A22, A24, A26, A28, and A30 are also given.

[0191] Table 13

[0192]

[0193]

[0194] Table 14

[0195]

[0196]

[0197] Please refer to Figure 14 , from Figure 14 the (A) longitudinal spherical aberration diagram in Figure 14 the (B) astigmatism curve diagram in Figure 14 and the (C) distortion curve diagram in Figure 14 it can be seen that the longitudinal spherical aberration, astigmatism, and distortion of the optical lens 100 are all well controlled, so that the optical lens 100 in this embodiment has good imaging quality. In addition, regarding Figure 14 the (A) in Figure 14 , the (B) in Figure 2 and the (C) in Figure 2 , the wavelengths corresponding to the curves in Figure 2 can refer to the content described in the (A) in

[0198] Please refer to Table 15. Table 15 is a summary of the ratio of each relationship in Embodiment 1 to Embodiment 7 of the present application.

[0199] Table 15

[0200]

[0201]

[0202] Please refer to Figure 15, In a second aspect, the present application also discloses an imaging module 200, which includes an image sensor 201 and an optical lens 100 as described in any one of Embodiments 1 to 7 of the first aspect above. The image sensor 201 is disposed on the image side of the optical lens 100. The optical lens 100 is configured to receive the optical signal of the object to be photographed and project it onto the image sensor 201, and the image sensor 201 is configured to convert the optical signal corresponding to the object to be photographed into an image signal, which will not be elaborated here. It can be understood that the imaging module 200 having the above optical lens 100 can have the advantages of a small head size and a wide-angle function. Since the above technical effects have been described in detail in the embodiments of the optical lens 100, they will not be elaborated here.

[0203] Please refer to Figure 16 , In a third aspect, the present application also discloses an electronic device 300, which includes a housing 301 and the imaging module 200 as described in the second aspect above. The imaging module 200 is disposed in the housing 301. Among them, the electronic device 300 can be, but is not limited to, a mobile phone, a tablet computer, a laptop computer, a smart watch, a monitor, a dash cam, a rearview camera, etc. It can be understood that the electronic device 300 having the above imaging module 200 also has all the technical effects of the above optical lens. That is, it can have the advantages of a small head size and a wide-angle function. Since the above technical effects have been described in detail in the embodiments of the optical lens, they will not be elaborated here.

[0204] The first, second, third, and various numerical numbers involved in this article are only for the convenience of description and are not used to limit the scope of the present application.

[0205] It should be understood that in various embodiments of the present application, the magnitude of the serial numbers of the above processes does not mean the order of execution. The order of execution of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

[0206] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An optical lens, characterized in that, it has a total of six lenses with refractive power, which successively include from the object side to the image side along the optical axis: a first lens with refractive power; a second lens with positive refractive power, the object side and the image side of the second lens are both convex near the optical axis; a third lens with negative refractive power; a fourth lens with positive refractive power, the object side of the fourth lens is concave near the optical axis, and the image side of the fourth lens is convex near the optical axis; a fifth lens with negative refractive power; a sixth lens with refractive power, the object side of the sixth lens is convex near the optical axis, and the image side of the sixth lens is concave near the optical axis; the optical lens satisfies the following relational expressions: 0.7mm < SD11 / tan(HFOV) < 1.1mm, 45deg < HFOV < 50deg; wherein, HFOV is half of the maximum field of view angle of the optical lens, and SD11 is the maximum effective semi-aperture of the object side of the first lens.

2. The optical lens according to claim 1, characterized in that, the optical lens further includes a diaphragm, the diaphragm is located between the image side of the first lens and the object side of the second lens, and the optical lens satisfies the relational expression: 1.0 < CT1 / T10 < 2.0; wherein, CT1 is the thickness of the first lens on the optical axis, and T10 is the distance on the optical axis from the image side of the first lens to the surface of the diaphragm.

3. The optical lens according to claim 1, characterized in that, the optical lens satisfies the relational expression: 1.5 < (CT1 + CT2) / (T12 + T23) < 3.5; wherein, CT1 is the thickness of the first lens on the optical axis, CT2 is the thickness of the second lens on the optical axis, T12 is the distance on the optical axis between the image side of the first lens and the object side of the second lens, and T23 is the distance on the optical axis between the image side of the second lens and the object side of the third lens.

4. The optical lens according to claim 1, characterized in that, the optical lens satisfies the relational expression: 0.3 < ET4 / CT4 < 0.6; wherein, ET4 is the distance in the direction parallel to the optical axis from the maximum effective semi-aperture of the object side of the fourth lens to the maximum effective semi-aperture of the image side of the fourth lens, and CT4 is the thickness of the fourth lens on the optical axis.

5. The optical lens according to claim 1, characterized in that, the optical lens satisfies the relational expression: 0.4 < (f1 + f2) / (f1 - f2) < 1.6; and / or, 0 < R1 / R2 < 1.8; wherein, f1 is the focal length of the first lens, f2 is the focal length of the second lens, R1 is the radius of curvature of the object side of the first lens at the optical axis, and R2 is the radius of curvature of the image side of the first lens at the optical axis.

6. The optical lens according to claim 1, characterized in that, the optical lens satisfies the relational expression: 0.1 < f2 / f34 < 2.0; Wherein, f2 is the focal length of the second lens, and f34 is the combined focal length of the third lens and the fourth lens.

7. The optical lens according to claim 1, characterized in that the optical lens satisfies the relational expression: 1.3 < TTL / Imgh < 1.6; wherein, TTL is the distance between the object side of the first lens and the imaging surface of the optical lens on the optical axis, and Imgh is the radius of the maximum effective imaging circle of the optical lens.

8. The optical lens according to claim 1, characterized in that the optical lens satisfies the relational expression: -1.0 < (R4 + R5) / (R4 - R5) < -0.5; wherein, R4 is the curvature radius of the object side of the second lens on the optical axis, and R5 is the curvature radius of the image side of the second lens on the optical axis.

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

10. An electronic device, characterized in that: the electronic device includes the imaging module according to claim 9.

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