Optical lens assembly, camera module and terminal

Abstract

Embodiments of the present application disclose an optical lens group, a camera module, and a terminal, relating to the field of optical imaging technologies. The optical lens group includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens sequentially arranged along the optical axis from the object plane to the image plane. The optical lens group satisfies the following relationships: 1.0 < f123 / f < 1.7; f / EPD ≤ 2.0. Through a reasonably balanced lens configuration, on the one hand, the overall optical length of the optical system can be effectively shortened, which is beneficial to the miniaturization of the optical system and can improve the imaging quality of the optical system; on the other hand, the optical lens group has the characteristic of a large aperture, so that the light flux per unit time of the optical system can be increased, and the imaging effect of the optical system in a dark environment can be enhanced.

Description

Technical Field

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

[0002] With the development of science and technology, various terminals are increasingly used in people's lives, among which the camera device has become a standard configuration of the terminal. With the improvement of the performance of commonly used photosensitive elements such as photosensitive elements or complementary metal oxide semiconductor elements and the increase in their size, the increase in the number of pixels of the photosensitive elements and the decrease in their pixel size, the lens module has gradually tended to develop towards the field of high pixels and miniaturization.

[0003] In the related art, in order to ensure the high imaging quality of the optical lens, it is necessary to add more lenses to the lens. Although it has relatively good imaging performance, it has a long total lens length and is difficult to be applied to portable terminals with high miniaturization requirements. Therefore, with the trend of terminals developing towards lighter and thinner, there is an urgent need for an optical system that can maintain excellent imaging effects and be miniaturized. Summary of the invention

[0004] The present application provides an optical lens assembly, a camera module and a terminal, which have good imaging effects and can meet the requirements of miniaturization. The technical solution is as follows:

[0005] In a first aspect, an embodiment of the present application provides an optical lens assembly, characterized in that it includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged in sequence from an object plane to an image plane along an optical axis;

[0006] The first lens has positive optical power;

[0007] The second lens has an optical power;

[0008] The third lens has optical power, and the radius of curvature of the object side surface of the third lens at the optical axis is positive, and the radius of curvature of the image side surface of the third lens at the optical axis is positive;

[0009] The fourth lens has positive refractive power;

[0010] The fifth lens has optical power, the object side surface and the image side surface of the fifth lens are both aspherical surfaces, and at least one of the object side surface and the image side surface of the fifth lens has at least one inflection point;

[0011] The sixth lens has negative optical power;

[0012] The optical lens assembly satisfies the following relationship:

[0013] 1.0 <f123 / f<1.7;

[0014] f / EPD≤2.0;

[0015] Wherein, f123 is the combined focal length of the first lens, the second lens and the third lens, the total effective focal length of the optical lens assembly is f, and the entrance pupil diameter of the optical lens assembly is EPD.

[0016] Therefore, through the above-mentioned reasonably balanced lens configuration, and the reasonable setting of the relationship between the combined focal length of the first lens, the second lens, and the third lens and the total effective focal length of the optical lens group, and the relationship between the total effective focal length of the optical lens group and the entrance pupil diameter of the optical lens group, on the one hand, the total optical length of the optical system can be effectively shortened, which is conducive to the miniaturization of the optical system, and the excessive increase of high-order spherical aberration can be avoided at the same time, thereby achieving the improvement of the imaging quality of the optical system. At the same time, the optical lens group can be made to have the characteristics of a large aperture, so that the luminous flux per unit time of the optical system can be increased, and the imaging effect of the optical system in a dark environment can be enhanced. Thus, the problem that the total optical length of the optical system in the related art is long, which is not conducive to the miniaturization of the optical system, and the excessive increase of high-order spherical aberration leads to the reduction of the imaging quality of the optical system is avoided. In addition, the problem that the aperture of the optical lens group in the related art is small, which reduces the luminous flux per unit time of the optical system, and also reduces the imaging effect of the optical system in a dark environment can be overcome.

[0017] Optionally, in one of the embodiments, the optical lens assembly satisfies the following relationship:

[0018] 0.5 <tan(HFOV) / SD11<1;

[0019] Among them, HFOV is half of the maximum field of view of the optical lens assembly, and the maximum field of view is the field of view in the diagonal direction of the optical lens assembly, and SD11 is the effective semi-aperture of the object side of the first lens. In this way, while meeting the high-quality imaging quality of the optical lens assembly, the field of view of the optical lens assembly can also be matched with the total length, maintaining the miniaturization of the optical system.

[0020] Optionally, in one of the embodiments, the optical lens assembly satisfies the following relationship:

[0021] -1.5 <f1 / f6<0;

[0022] Wherein, f1 is the effective focal length of the first lens, and f6 is the effective focal length of the sixth lens. Thus, the focal power of the optical system can be reasonably allocated, so that the positive and negative spherical aberrations of the front lens group and the rear lens group are offset, thereby improving the imaging quality of the optical system.

[0023] Optionally, in one of the embodiments, the optical lens assembly satisfies the following relationship:

[0024] 0.5<|f6| / R62<8;

[0025] Wherein, f6 is the effective focal length of the sixth lens, and R62 is the curvature radius of the image side surface of the sixth lens. Thus, the deflection angle of the edge field light entering the photosensitive element can be effectively reduced, the matching degree between the optical lens group and the photosensitive element can be increased, and the off-axis field astigmatism can be improved, thereby improving the imaging quality of the optical system.

[0026] Optionally, in one of the embodiments, the optical lens assembly satisfies the following relationship:

[0027] 0.45 <CT4<0.9;

[0028] Wherein, CT4 is the thickness of the fourth lens on the optical axis. Thus, the good processability of the lens can be ensured, the sensitivity of the optical system can be reduced, and the field area of ​​the optical system can be controlled within a reasonable range, which is conducive to the miniaturization of the optical system.

[0029] Optionally, in one of the embodiments, the optical lens assembly satisfies the following relationship:

[0030] 2.0 <CT1 / (T12+T23)<3.0;

[0031] Wherein, CT1 is the thickness of the first lens on the optical axis, T12 is the spacing distance between the first lens and the second lens on the optical axis, and T23 is the spacing distance between the second lens and the third lens on the optical axis. Thus, the first lens, the second lens and the third lens can have enough space when assembled to avoid collision between the first lens and the second lens, or between the second lens and the third lens. In addition, the shortening of CT1, T12 and T23 is conducive to the thinning of the optical lens assembly, and can also avoid their values ​​being too small to be unfavorable for assembly, increase the sensitivity of the optical system, and thus improve the imaging quality of the optical lens assembly.

[0032] Optionally, in one of the embodiments, the optical lens assembly satisfies the following relationship:

[0033] 0.1<(CT1+CT2+CT3) / TTL<0.3;

[0034] 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, CT3 is the center thickness of the third lens on the optical axis, and TTL is the distance from the object side of the first lens to the image plane on the optical axis. This is conducive to reducing the sensitivity of the optical system while maintaining the miniaturization of the optical system.

[0035] Optionally, in one of the embodiments, the optical lens assembly satisfies the following relationship:

[0036] 3.0<|vd4-vd3|<42.0;

[0037] Wherein, vd3 is the Abbe number of the third lens, and vd4 is the Abbe number of the fourth lens. Thus, the chromatic aberration of the optical lens assembly can be effectively corrected, the imaging clarity of the optical lens assembly can be improved, and thus the imaging quality of the optical lens assembly can be improved.

[0038] Optionally, in one of the embodiments, the optical lens assembly satisfies the following relationship:

[0039] 0.5 <CT5 / |SAG51|<2.0;

[0040] Among them, CT5 is the thickness of the fifth lens on the optical axis, and SAG51 is the horizontal displacement of the intersection of the fifth lens object side on the optical axis to the maximum effective radius position of the fifth lens object side on the optical axis. Thus, the shape of the fifth lens can be appropriately conducive to the manufacture and molding of the fifth lens, reducing the defects of poor molding of the fifth lens. At the same time, the field area generated by the front lens group can be trimmed to ensure the balance of the optical system field area and improve the imaging quality of the optical system.

[0041] In a second aspect, an embodiment of the present application further provides a camera module, which includes a photosensitive element and the above-mentioned optical lens assembly.

[0042] By adopting the above-mentioned optical lens assembly, the camera module can effectively shorten the overall size of the camera module while having excellent imaging quality, thereby achieving a miniaturized design.

[0043] In a third aspect, an embodiment of the present application further provides a terminal, which includes the above-mentioned camera module.

[0044] By adopting the above-mentioned camera module, the terminal can not only be designed to be thinner and have a larger internal design space, but the terminal can also provide users with better imaging effects.

[0045] The beneficial effects brought about by the technical solutions provided by some embodiments of the present application include at least:

[0046] An embodiment of the present application provides an optical lens group, which includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged in sequence from the object plane to the image plane along the optical axis; the first lens has a positive optical power; the second lens has an optical power; the third lens has an optical power, and the curvature radius of the object side surface of the third lens at the optical axis is positive, and the curvature radius of the image side surface of the third lens at the optical axis is positive; the fourth lens has a positive optical power; the fifth lens has an optical power, both the object side surface and the image side surface of the fifth lens are aspherical surfaces, and at least one of the object side surface and the image side surface of the fifth lens has at least one inflection point; the sixth lens has a negative optical power; the optical lens group satisfies the following relationships: 1.0 < f123 / f < 1.7; f / EPD ≤ 2.0; where f123 is the combined focal length of the first lens, the second lens, and the third lens, the total effective focal length of the optical lens group is f, and the entrance pupil diameter of the optical lens group is EPD. Thus, through the above reasonable and balanced lens configuration and reasonable setting of the relationship between the combined focal length of the first lens, the second lens, and the third lens and the total effective focal length of the optical lens group and the relationship between the total effective focal length of the optical lens group and the entrance pupil diameter of the optical lens group, on the one hand, the optical total length of the optical system can be effectively shortened, which is beneficial to the miniaturization of the optical system, and the excessive increase of high-order spherical aberration can be avoided at the same time, thereby realizing the improvement of the imaging quality of the optical system. At the same time, the optical lens group can have the characteristic of a large aperture, so that the light flux per unit time of the optical system can be increased, and the imaging effect of the optical system in a dark environment can be enhanced. Thus, the problems in the prior art that lead to a longer optical total length of the optical system, are not conducive to the miniaturization of the optical system, and the excessive increase of high-order spherical aberration, resulting in a reduction in the imaging quality of the optical system are avoided. In addition, the problem in the prior art that the aperture of the optical lens group is small, reducing the light flux per unit time of the optical system and thus reducing the imaging effect of the optical system in a dark environment can also be overcome. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0048] Figure 1 FIG. is a schematic structural diagram of an optical lens group provided by the first embodiment of the present application;

[0049] Figure 2 FIG. is a spherical chromatic aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of an optical lens group provided by the first embodiment of the present application;

[0050] Figure 3A schematic structural diagram of an optical lens assembly provided in a second embodiment of the present application;

[0051] Figure 4 A spherical chromatic aberration diagram (mm), an astigmatism diagram (mm) and a distortion diagram (%) of an optical lens assembly are provided for the second embodiment of the present application;

[0052] Figure 5 A schematic structural diagram of an optical lens assembly provided in a third embodiment of the present application;

[0053] Figure 6 A spherical aberration diagram (mm), an astigmatism diagram (mm), and a distortion diagram (%) of an optical lens assembly are provided for the third embodiment of the present application;

[0054] Figure 7 A schematic structural diagram of an optical lens assembly provided in a fourth embodiment of the present application;

[0055] Figure 8 A spherical chromatic aberration diagram (mm), an astigmatism diagram (mm), and a distortion diagram (%) of an optical lens assembly are provided for a fourth embodiment of the present application;

[0056] Fig. 9 A schematic structural diagram of an optical lens assembly provided in a fifth embodiment of the present application;

[0057] Fig.10 A spherical chromatic aberration diagram (mm), an astigmatism diagram (mm), and a distortion diagram (%) of an optical lens assembly are provided for the fifth embodiment of the present application;

[0058] Fig.11 A schematic structural diagram of an optical lens assembly provided in a sixth embodiment of the present application;

[0059] Fig.12 A spherical chromatic aberration diagram (mm), an astigmatism diagram (mm), and a distortion diagram (%) of an optical lens assembly are provided for the sixth embodiment of the present application;

[0060] Fig.13 A schematic structural diagram of an optical lens assembly provided in a sixth embodiment of the present application;

[0061] Fig.14 A spherical chromatic aberration diagram (mm), an astigmatism diagram (mm), and a distortion diagram (%) of an optical lens assembly are provided for the sixth embodiment of the present application;

[0062] Fig.15 A schematic diagram of a camera module provided in one embodiment of the present application;

[0063] Fig.16 A schematic diagram of a terminal provided in accordance with an embodiment of the present application. DETAILED DESCRIPTION

[0064] In order to make the features and advantages of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0065] It should be noted that in this specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, without departing from the teaching of the present application, the first lens of the optical lens assembly discussed below may also be referred to as the second lens or the third lens.

[0066] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for ease of explanation. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the drawings. The drawings are only examples and are not drawn strictly to scale.

[0067] In this article, the surface closest to the object in each lens is called the object side surface of the lens; the surface closest to the imaging plane in each lens is called the image side surface of the lens. The optical power of a lens can be the optical power of the lens at the optical axis. The object side surface of the lens is the surface of the lens facing the object plane, and the image side surface of the lens is the surface of the lens facing the image plane. A positive radius of curvature of a surface at the optical axis indicates that the surface is convex toward the object plane, that is, the surface is concave toward the image plane; a negative radius of curvature of a surface at the optical axis indicates that the surface is convex toward the image plane, that is, the surface is concave toward the object plane.

[0068] See also Figure 1 , Figure 1 A schematic diagram of the structure of an optical lens assembly provided in an embodiment of the present application.

[0069] like Figure 1As shown, the optical lens assembly 100 includes a first lens 110, a second lens 120, a third lens 130, a fourth lens 140, a fifth lens 150 and a sixth lens 160 arranged in sequence along the optical axis from the object plane to the image plane. The first lens 110 includes an object side surface S1 and an image side surface S2. The first lens 110 has a positive optical focal length, wherein the optical focal length is equal to the difference between the convergence degree of the light beam on the image side surface and the convergence degree of the light beam on the object side surface. The optical focal length represents the refraction ability of the optical system to the incident parallel light beam. The larger the value of the optical focal length is, the more the parallel light beam is refracted. When the optical focal length is greater than zero, that is, when the optical focal length is positive, the refraction of the light beam is convergent; when the optical focal length is less than zero, that is, when the optical focal length is negative, the refraction of the light beam is divergent; when the optical focal length is equal to zero, the light beam is plane refracted. At this time, the parallel light beam along the optical axis is still a parallel light beam along the optical axis after refraction, and no refraction phenomenon occurs.

[0070] The second lens 120 includes an object-side surface S3 and an image-side surface S4, and the second lens 120 has optical power, and the optical power of the second lens 120 can be positive optical power or negative optical power. The third lens 130 includes an object-side surface S5 and an image-side surface S6, and the third lens 130 has optical power, and the optical power of the third lens 130 can be positive optical power or negative optical power, and the curvature radius of the object-side surface S5 of the third lens 130 at the optical axis is positive, and the curvature radius of the image-side surface S6 of the third lens 130 at the optical axis is positive. The fourth lens 140 includes an object-side surface S7 and an image-side surface S8, and the fourth lens 140 has positive optical power. The fifth lens 150 includes an object side surface S9 and an image side surface S10, and the fifth lens 150 has a focal power, and the focal power of the fifth lens 150 can be positive focal power or negative focal power. The object side surface S9 and the image side surface S10 of the fifth lens 150 are both aspherical surfaces, wherein in three-dimensional space, Euclidean, and geometrical, a spherical surface can be set as a set of all points with a distance r from a fixed point in R space, where r is a positive real number called a radius, and a fixed point is called a sphere center or a center, and at least one of the object side surface S9 and the image side surface S10 of the fifth lens 150 has at least one inflection point, wherein an inflection point can refer to a point that changes the upward or downward direction of a curve. The sixth lens 160 includes an object side surface S11 and an image side surface S12, and the sixth lens 160 has a negative focal power, and the focal power of the sixth lens 160 can be positive focal power or negative focal power.

[0071] The optical lens assembly 100 satisfies the following relationship:

[0072] 1.0 <f123 / f<1.7;

[0073] f / EPD≤2.0;

[0074] Wherein, f123 is the combined focal length of the first lens 110 , the second lens 120 and the third lens 130 , the total effective focal length of the optical lens assembly 100 is f, and the entrance pupil diameter of the optical lens assembly 100 is EPD.

[0075] For example, f123 / f may be 1.529, 1.421, 1.504, 1.124, 1.34, 1.247 or 1.535, and f / EPD may be 1.87, 1.85, 2.00, 1.93, 1.59, 1.82 or 1.87. Thus, by the above-mentioned reasonably balanced lens configuration, and by reasonably setting the relationship between the combined focal length of the first lens 110, the second lens 120, and the third lens 130 and the total effective focal length of the optical lens assembly 100, and the relationship between the total effective focal length of the optical lens assembly 100 and the entrance pupil diameter of the optical lens assembly 100, on the one hand, the total optical length of the optical system can be effectively shortened, which is conducive to the miniaturization of the optical system, and at the same time, the excessive increase of high-order spherical aberration can be avoided, thereby improving the imaging quality of the optical system. At the same time, the optical lens assembly 100 can have the characteristics of a large aperture, thereby increasing the luminous flux per unit time of the optical system and enhancing the imaging effect of the optical system in a dark environment. Thus, the problem that the total optical length of the optical system is long, which is not conducive to the miniaturization of the optical system, and the high-order spherical aberration is excessively increased, resulting in reduced imaging quality of the optical system, is avoided in the related art. In addition, the problem that the aperture of the optical lens assembly 100 is small in the related art, which reduces the luminous flux per unit time of the optical system, and thus reduces the imaging effect of the optical system in a dark environment, can be overcome.

[0076] The image plane side S2 of the first lens 110 may also be provided with a stop S0, in which case the exit pupil can be moved away from the image plane S15, and the effective diameter of the optical lens assembly 100 can be reduced without reducing the telecentricity of the optical lens assembly 100, thereby achieving miniaturization. In some embodiments, the stop S0 is fixed to other lenses, thereby reducing the volume of the optical lens assembly 100 and achieving a miniaturized design.

[0077] An infrared filter 170 may be disposed between the sixth lens 160 and the image plane S15. The infrared filter 170 includes an object-side surface S13 and an image-side surface S14, and the infrared filter 170 is made of glass. The infrared filter 170 is used to isolate infrared light and prevent infrared light from entering the image plane S15, thereby preventing infrared light from affecting the color and clarity of the image, and improving the imaging effect of the optical lens assembly 100 during the day.

[0078] The first lens 110, the second lens 120, the third lens 130, the fourth lens 140 and the fifth lens 150 may all be made of plastic, and plastic lenses can reduce the weight and cost of the optical lens assembly 100. In other embodiments, the first lens 110, the second lens 120, the third lens 130, the fourth lens 140 and the fifth lens 150 may all be made of glass, and glass lenses have good optical properties and can withstand higher temperatures.

[0079] The optical lens assembly 100 may also satisfy the following relationship:

[0080] 0.5 <tan(HFOV) / SD11<1;

[0081] Wherein, HFOV is half of the maximum field of view of the optical lens assembly 100 , and the maximum field of view is the field of view in the diagonal direction of the optical lens assembly 100 , and SD11 is the effective semi-aperture of the object side surface of the first lens 110 .

[0082] For example, tan(HFOV) / SD11 may be 0.725, 0.625, 0.818, 0.668, 0.573, 0.675 or 0.726. Thus, while the optical lens assembly 100 has a high imaging quality, the field of view angle and the total length of the optical lens assembly 100 can be matched, thereby maintaining the miniaturization of the optical system.

[0083] The optical lens assembly 100 may also satisfy the following relationship:

[0084] -1.5 <f1 / f6<0;

[0085] Wherein, f1 is the effective focal length of the first lens 110 , and f6 is the effective focal length of the sixth lens 160 .

[0086] For example, f1 / f6 can be -0.640, -0.580, -0.570, -0.410, -0.820, -1.38 or -0.52. Thus, the optical power of the optical system can be reasonably allocated, the positive and negative spherical aberrations of the front lens group and the rear lens group can be offset, and the imaging quality of the optical system can be improved.

[0087] The optical lens assembly 100 may also satisfy the following relationship:

[0088] 0.5<|f6| / R62<8;

[0089] Wherein, f6 is the effective focal length of the sixth lens 160 , and R62 is the curvature radius of the image-side surface of the sixth lens 160 .

[0090] For example, |f6| / R62 can be 5.449, 5.936, 5.966, 5.917, 7.101, 0.958 or 7.628. Thus, the deflection angle of the edge field light entering the photosensitive element can be effectively reduced, the matching degree between the optical lens assembly 100 and the photosensitive element can be increased, and the off-axis field astigmatism can be improved, thereby improving the imaging quality of the optical system.

[0091] The optical lens assembly 100 may also satisfy the following relationship:

[0092] 0.45 <CT4<0.9;

[0093] CT4 is the thickness of the fourth lens 140 on the optical axis.

[0094] For example, CT4 can be 0.676, 0.876, 0.59, 0.46, 0.48, 0.377 or 0.657 (the unit of thickness is millimeter). Thus, the good processability of the lens can be ensured, the sensitivity of the optical system can be reduced, and the field area of ​​the optical system can be controlled within a reasonable range, which is conducive to the miniaturization of the optical system.

[0095] The optical lens assembly 100 may also satisfy the following relationship:

[0096] 2.0 <CT1 / (T12+T23)<3.0;

[0097] CT1 is the thickness of the first lens 110 on the optical axis, T12 is the distance between the first lens 110 and the second lens 120 on the optical axis, and T23 is the distance between the second lens 120 and the third lens 130 on the optical axis.

[0098] For example, CT1 / (T12+T23) may be 2.438, 2.281, 2.014, 2.725, 2.053, 2.624 or 2.602. Thus, the first lens 110, the second lens 120 and the third lens 130 may have enough space when assembled, thereby avoiding collision between the first lens 110 and the second lens 120, or between the second lens 120 and the third lens 130. In addition, the shortening of CT1, T12 and T23 is beneficial to the thinning of the optical lens assembly 100, and also avoids the inconvenience of assembly due to their too small values, thereby increasing the sensitivity of the optical system and improving the imaging quality of the optical lens assembly 100.

[0099] The optical lens assembly 100 may also satisfy the following relationship:

[0100] 0.1<(CT1+CT2+CT3) / TTL<0.3;

[0101] Wherein, CT1 is the thickness of the first lens 110 on the optical axis, CT2 is the thickness of the second lens 120 on the optical axis, CT3 is the center thickness of the third lens 130 on the optical axis, and TTL is the distance from the object side surface of the first lens 110 to the image plane on the optical axis.

[0102] For example, (CT1+CT2+CT3) / TTL may be 0.232, 0.261, 0.211, 0.239, 0.237, 0.248 or 0.252. This is beneficial for reducing the sensitivity of the optical system while maintaining the miniaturization of the optical system.

[0103] The optical lens assembly 100 may also satisfy the following relationship:

[0104] 3.0<|vd4-vd3|<42.0;

[0105] Wherein, vd3 is the Abbe number of the third lens 130 , and vd4 is the Abbe number of the fourth lens 140 .

[0106] For example, |vd4-vd3| can be 35.56, 36.39, 39.34, 35.56, 4.57, 32.67 or 35.56. Reasonable selection of lens materials so that the Abbe number of the third lens 130 and the Abbe number of the fourth lens 140 satisfy the above relationship can effectively correct the chromatic aberration of the optical lens assembly 100, improve the imaging clarity of the optical lens assembly 100, and thus improve the imaging quality of the optical lens assembly 100.

[0107] The optical lens assembly 100 may also satisfy the following relationship:

[0108] 0.5 <CT5 / |SAG51|<2.0;

[0109] Among them, CT5 is the thickness of the fifth lens 150 on the optical axis, SAG51 is the horizontal displacement of the object side of the fifth lens 150 on the optical axis from the intersection of the object side of the fifth lens 150 on the optical axis to the maximum effective radius position of the object side of the fifth lens 150, wherein the horizontal displacement is defined as positive toward the image side and negative toward the object side.

[0110] For example, CT5 / |SAG51| can be 1.72, 1.00, 1.82, 0.58, 1.53, 1.87 or 1.48. Thus, the shape of the fifth lens 150 can be appropriately made to facilitate the manufacture and molding of the fifth lens 150, and reduce the defect of poor molding of the fifth lens 150. At the same time, the field area generated by the entire front lens group can be corrected to ensure the balance of the field area of ​​the optical system and improve the imaging quality of the optical system.

[0111] In an embodiment of the present application, an optical lens group includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens sequentially arranged along the optical axis from the object plane to the image plane; the first lens has a positive optical power; the second lens has an optical power; the third lens has an optical power, and the radius of curvature of the object side surface of the third lens at the optical axis is positive, and the radius of curvature of the image side surface of the third lens at the optical axis is positive; the fourth lens has a positive optical power; the fifth lens has an optical power, both the object side surface and the image side surface of the fifth lens are aspherical surfaces, and at least one of the object side surface and the image side surface of the fifth lens has at least one inflection point; the sixth lens has a negative optical power; the optical lens group satisfies the following relationships: 1.0 < f123 / f < 1.7; f / EPD ≤ 2.0; where f123 is the combined focal length of the first lens, the second lens, and the third lens, the total effective focal length of the optical lens group is f, and the entrance pupil diameter of the optical lens group is EPD. Thus, through the above reasonable and balanced lens configuration and by reasonably setting the relationship between the combined focal length of the first lens, the second lens, and the third lens and the total effective focal length of the optical lens group and the relationship between the total effective focal length of the optical lens group and the entrance pupil diameter of the optical lens group, on the one hand, the optical total length of the optical system can be effectively shortened, which is beneficial to the miniaturization of the optical system, and the excessive increase of high-order spherical aberration can be avoided at the same time, thereby improving the imaging quality of the optical system. At the same time, the optical lens group can have the characteristic of a large aperture, so that the light flux per unit time of the optical system can be increased, and the imaging effect of the optical system in a dark environment can be enhanced. Thus, the problems in the prior art that the optical total length of the optical system is relatively long, which is not conducive to the miniaturization of the optical system, and the high-order spherical aberration increases excessively, resulting in the reduction of the imaging quality of the optical system are avoided. In addition, the problem in the prior art that the aperture of the optical lens group is small, reducing the light flux per unit time of the optical system and thus reducing the imaging effect of the optical system in a dark environment can also be overcome.

[0112] The imaging optical lens group 100 will be described in detail below with specific parameters.

[0113] Embodiment 1

[0114] The structural schematic diagram of the imaging optical lens group 100 in an embodiment of the present application is as Figure 1 , the optical lens group 100 includes a first lens 110, a second lens 120, a third lens 130, a fourth lens 140, a fifth lens 150, and a sixth lens 160 sequentially arranged along the optical axis from the object plane to the image plane. The relevant parameters of the optical lens group 100 are shown in Table 1. In Table 1, f is the focal length of the optical lens group 100, FNO represents the aperture value, HFOV represents half of the maximum field of view angle of the optical lens group 100, and the maximum field of view angle is the field of view angle in the diagonal direction of the optical lens group 100, and TTL represents the distance from the object side surface of the first lens 110 to the image plane on the optical axis. The units of the focal length, radius of curvature, and thickness are all millimeters.

[0115] Table 1

[0116]

[0117]

[0118] From Table 1 and Figure 1It can be seen that in the embodiment of the present application, the first lens 110 has positive optical power, and the radius of curvature of the object plane of the first lens 110 at the optical axis is positive, so the object plane of the first lens 110 at the optical axis is convex toward the object plane, and the radius of curvature of the image plane of the first lens 110 at the optical axis is positive, so the image plane of the first lens 110 at the optical axis is concave toward the image plane. The object plane of the first lens 110 at the circumference is convex toward the object plane, and the image plane of the first lens 110 at the circumference is convex toward the image plane. The second lens 120 has negative optical power, and the radius of curvature of the object plane of the second lens 120 at the optical axis is positive, so the object plane of the second lens 120 at the optical axis is convex toward the object plane, and the radius of curvature of the image plane of the second lens 120 at the optical axis is positive, so the image plane of the second lens 120 at the optical axis is concave toward the image plane. The object surface side of the second lens 120 is convexly arranged toward the object surface at the circumference, and the image surface side of the second lens 120 is concavely arranged toward the image surface at the circumference. The third lens 130 has negative optical power, and the curvature radius of the object surface side of the third lens 130 at the optical axis is positive, so the object surface side of the third lens 130 is convexly arranged toward the object surface at the optical axis, and the curvature radius of the image surface side of the third lens 130 at the optical axis is positive, so the image surface side of the third lens 130 is concavely arranged toward the image surface at the optical axis. The object surface side of the third lens 130 is concavely arranged toward the object surface at the circumference, and the image surface side of the third lens 130 is convexly arranged toward the image surface at the circumference. The fourth lens 140 has positive power, and the radius of curvature of the object surface of the fourth lens 140 at the optical axis is negative, so the object surface of the fourth lens 140 at the optical axis is concave toward the object surface, and the radius of curvature of the image surface of the fourth lens 140 at the optical axis is negative, so the image surface of the fourth lens 140 at the optical axis is convex toward the image surface. The object surface of the fourth lens 140 at the circumference is concave toward the object surface, and the image surface of the fourth lens 140 at the circumference is convex toward the image surface. The fifth lens 150 has positive power, and the radius of curvature of the object surface of the fifth lens 150 at the optical axis is positive, so the object surface of the fifth lens 150 at the optical axis is convex toward the object surface, and the radius of curvature of the image surface of the fifth lens 150 at the optical axis is positive, so the image surface of the fifth lens 150 at the optical axis is concave toward the image surface. The object surface side of the fifth lens 150 is concavely arranged toward the object surface at the circumference, and the image surface side of the fifth lens 150 is convexly arranged toward the image surface at the circumference. The sixth lens 160 has negative optical power, and the curvature radius of the object surface side of the sixth lens 160 at the optical axis is positive, so the object surface side of the sixth lens 160 is convexly arranged toward the object surface at the optical axis, and the curvature radius of the image surface side of the sixth lens 160 at the optical axis is positive, so the image surface side of the sixth lens 160 is concavely arranged toward the image surface at the optical axis. The object surface side of the sixth lens 160 is convexly arranged toward the object surface at the circumference, and the image surface side of the sixth lens 160 is convexly arranged toward the image surface at the circumference.

[0119] Furthermore, the optical lens assembly 100 satisfies the following relationship:

[0120] f123 / f=1.529; f / EPD=1.87.

[0121] Wherein, f123 is the combined focal length of the first lens 110 , the second lens 120 and the third lens 130 , the total effective focal length of the optical lens assembly 100 is f, and the entrance pupil diameter of the optical lens assembly 100 is EPD.

[0122] By reasonably balancing the lens configuration, the relationship between the combined focal length of the first lens 110, the second lens 120, and the third lens 130 and the total effective focal length of the optical lens assembly 100 satisfies: f123 / f=1.529, which can effectively shorten the total optical length of the optical system, facilitate miniaturization of the optical system, and simultaneously avoid excessive increase of high-order spherical aberration, thereby improving the imaging quality of the optical system. When the relationship between the combined focal length of the first lens 110, the second lens 120, and the third lens 130 and the total effective focal length of the optical lens assembly 100 exceeds the above range, the total optical length of the optical system will be longer, which is not conducive to miniaturization of the optical system, and the high-order spherical aberration will be excessively increased, resulting in reduced imaging quality of the optical system.

[0123] When the total effective focal length of the optical lens assembly 100 and the entrance pupil diameter of the optical lens assembly 100 satisfy: f / EPD=1.87, the optical lens assembly 100 has the characteristic of a large aperture, thereby increasing the luminous flux per unit time of the optical system and enhancing the imaging effect of the optical system in a dark environment. When the total effective focal length of the optical lens assembly 100 and the entrance pupil diameter of the optical lens assembly 100 exceed the above range, the aperture of the optical lens assembly 100 is small, which reduces the luminous flux per unit time of the optical system, and also reduces the imaging effect of the optical system in a dark environment.

[0124] The optical lens assembly 100 satisfies the following relationship:

[0125] tan(HFOV) / SD11=0.725.

[0126] Wherein, HFOV is half of the maximum field of view of the optical lens assembly 100, and the maximum field of view is the field of view in the diagonal direction of the optical lens assembly 100, and SD11 is the effective semi-aperture of the object side of the first lens 110. When half of the maximum field of view of the optical lens assembly 100 and the effective semi-aperture of the object side of the first lens 110 satisfy the above relationship, the field of view displayed by the optical lens assembly 100 can be matched with the total length while satisfying the high quality of imaging of the optical lens assembly 100, thereby maintaining the miniaturization of the optical system.

[0127] The optical lens assembly 100 satisfies the following relationship:

[0128] f1 / f6=-0.64.

[0129] Wherein, f1 is the effective focal length of the first lens 110, and f6 is the effective focal length of the sixth lens 160. By controlling the ratio of the effective focal lengths of the first lens 110 and the sixth lens 160 to satisfy the above relationship, the optical power of the optical system can be reasonably allocated, the positive and negative spherical aberrations of the front lens group and the rear lens group can be offset, and the imaging quality of the optical system can be improved.

[0130] The optical lens assembly 100 satisfies the following relationship:

[0131] |f6| / R62=5.449.

[0132] Wherein, f6 is the effective focal length of the sixth lens 160, and R62 is the curvature radius of the image side surface of the sixth lens 160. By adjusting the curvature radius of the image side surface of the sixth lens 160 and the effective focal length of the sixth lens 160 to satisfy the above relationship, the deflection angle of the edge field light entering the photosensitive element can be effectively reduced, the matching degree between the optical lens assembly 100 and the photosensitive element can be increased, and the off-axis field astigmatism can be improved, thereby improving the imaging quality of the optical system.

[0133] The optical lens assembly 100 satisfies the following relationship:

[0134] CT4=0.676.

[0135] Wherein, CT4 is the thickness of the fourth lens 140 on the optical axis. Reasonable control of the center thickness of the fourth lens 140 so that the center thickness of the fourth lens 140 meets the above range can ensure good processability of the lens, reduce the sensitivity of the optical system, and control the field area of ​​the optical system within a reasonable range, which is conducive to the miniaturization of the optical system.

[0136] The optical lens assembly 100 satisfies the following relationship:

[0137] CT1 / (T12+T23)=2.438.

[0138] Wherein, CT1 is the thickness of the first lens 110 on the optical axis, T12 is the spacing distance between the first lens 110 and the second lens 120 on the optical axis, and T23 is the spacing distance between the second lens 120 and the third lens 130 on the optical axis. When the first lens 110, the second lens 120, and the third lens 130 are properly controlled to satisfy the above relationship, there can be enough space for the three lenses during assembly, and collision between the first lens 110 and the second lens 120, or between the second lens 120 and the third lens 130 can be avoided. In addition, shortening of CT1, T12, and T23 is beneficial to the thinning of the optical lens assembly 100, and can also avoid that their values ​​are too small to be unfavorable for assembly, increase the sensitivity of the optical system, and thus improve the imaging quality of the optical lens assembly 100.

[0139] The optical lens assembly 100 satisfies the following relationship:

[0140] (CT1+CT2+CT3) / TTL=0.232.

[0141] Wherein, CT1 is the thickness of the first lens 110 on the optical axis, CT2 is the thickness of the second lens 120 on the optical axis, CT3 is the center thickness of the third lens 130 on the optical axis, and TTL is the distance from the object side surface of the first lens 110 to the image plane on the optical axis. By controlling the thickness configuration of the first lens 110, the second lens 120, and the third lens 130, it is beneficial to reduce the sensitivity of the optical system while maintaining the miniaturization of the optical system.

[0142] The optical lens assembly 100 satisfies the following relationship:

[0143] |vd4-vd3|=35.56.

[0144] Wherein, vd3 is the Abbe number of the third lens 130, and vd4 is the Abbe number of the fourth lens 140. By properly selecting lens materials so that the Abbe numbers of the third lens 130 and the fourth lens 140 satisfy the above relationship, the chromatic aberration of the optical lens assembly 100 can be effectively corrected, the imaging clarity of the optical lens assembly 100 can be improved, and thus the imaging quality of the optical lens assembly 100 can be improved.

[0145] The optical lens assembly 100 satisfies the following relationship:

[0146] CT5 / |SAG51|=1.72.

[0147] Among them, CT5 is the thickness of the fifth lens 150 on the optical axis, and SAG51 is the horizontal displacement of the intersection of the object side of the fifth lens 150 on the optical axis to the maximum effective radius position of the object side of the fifth lens 150 on the optical axis, wherein the horizontal displacement is defined as positive toward the image side and negative toward the object side. By controlling the fifth lens 150 to satisfy the above relationship, the shape of the fifth lens 150 can be appropriately made to facilitate the manufacture and molding of the fifth lens 150, and reduce the defects of poor molding of the fifth lens 150. At the same time, the field area generated by the front lens group can be trimmed to ensure the balance of the field area of ​​the optical system and improve the imaging quality of the optical system.

[0148] The surface of the lens of the optical lens assembly 100 may be an aspherical surface. For the surface of these aspherical surfaces, the aspherical surface equation is:

[0149]

[0150] Where Z is the height of the lens surface parallel to the Z axis, r is the radial distance from the vertex, c is the curvature of the surface at the vertex, K is the cone constant, A4, A6, A8, A10 , A 12 They represent the aspheric coefficients of the 4th, 6th, 8th, 10th and 12th order respectively. In the embodiment of the present application, the cone constant K and the aspheric coefficients corresponding to the surface of each aspheric surface are shown in Table 2:

[0151] Table 2

[0152]

[0153] Figure 2 1 and 2 are the spherochromatic aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the optical lens assembly 100 in the first embodiment.

[0154] Depend on Figure 2 It can be seen that the focal shifts of the spherical aberration corresponding to the wavelengths of 470.0000nm, 510.0000nm, 555.0000nm, 610.0000nm and 650.0000nm are all within 0.020 mm, indicating that the imaging quality of the embodiment of the present application is good, the astigmatism is well compensated, and the distortion is also well corrected.

[0155] Embodiment 2

[0156] The structural schematic diagram of the imaging optical lens assembly 100 of the embodiment of the present application is as follows Figure 3 The optical lens assembly 100 includes a first lens 110, a second lens 120, a third lens 130, a fourth lens 140, a fifth lens 150, and a sixth lens 160, which are sequentially arranged along the optical axis from the object plane to the image plane. The relevant parameters of the optical lens assembly 100 are shown in Table 3, where f is the focal length of the optical lens assembly 100, FNO represents the aperture value, HFOV represents half of the maximum field of view of the optical lens assembly 100, and the maximum field of view is the field of view in the diagonal direction of the optical lens assembly 100, TTL represents the distance from the object side of the first lens 110 to the image plane on the optical axis, and the units of the focal length, the radius of curvature, and the thickness are all in millimeters.

[0157] Table 3

[0158]

[0159] From Table 3 and Figure 3It can be known that in the embodiment of the present application, the first lens 110 has positive optical power, and the radius of curvature of the object plane side of the first lens 110 at the optical axis is positive, so the object plane side of the first lens 110 at the optical axis is convex toward the object plane, and the radius of curvature of the image plane side of the first lens 110 at the optical axis is positive, so the image plane side of the first lens 110 at the optical axis is concave toward the image plane. The object plane side of the first lens 110 at the circumference is convex toward the object plane, and the image plane side of the first lens 110 at the circumference is concave toward the image plane. The second lens 120 has negative optical power, and the radius of curvature of the object plane side of the second lens 120 at the optical axis is positive, so the object plane side of the second lens 120 at the optical axis is convex toward the object plane, and the radius of curvature of the image plane side of the second lens 120 at the optical axis is positive, so the image plane side of the second lens 120 at the optical axis is concave toward the image plane. The object surface side of the second lens 120 is convexly arranged toward the object surface at the circumference, and the image surface side of the second lens 120 is concavely arranged toward the image surface at the circumference. The third lens 130 has negative optical power, and the curvature radius of the object surface side of the third lens 130 at the optical axis is positive, so the object surface side of the third lens 130 is convexly arranged toward the object surface at the optical axis, and the curvature radius of the image surface side of the third lens 130 at the optical axis is positive, so the image surface side of the third lens 130 is concavely arranged toward the image surface at the optical axis. The object surface side of the third lens 130 is concavely arranged toward the object surface at the circumference, and the image surface side of the third lens 130 is convexly arranged toward the image surface at the circumference. The fourth lens 140 has positive refractive power, and the radius of curvature of the object surface of the fourth lens 140 at the optical axis is negative, so the object surface of the fourth lens 140 at the optical axis is concave toward the object surface, and the radius of curvature of the image surface of the fourth lens 140 at the optical axis is negative, so the image surface of the fourth lens 140 at the optical axis is convex toward the image surface. The object surface of the fourth lens 140 at the circumference is concave toward the object surface, and the image surface of the fourth lens 140 at the circumference is convex toward the image surface. The fifth lens 150 has positive refractive power, and the radius of curvature of the object surface of the fifth lens 150 at the optical axis is positive, so the object surface of the fifth lens 150 at the optical axis is convex toward the object surface, and the radius of curvature of the image surface of the fifth lens 150 at the optical axis is negative, so the image surface of the fifth lens 150 at the optical axis is convex toward the image surface. The object surface side of the fifth lens 150 is concavely arranged toward the object surface at the circumference, and the image surface side of the fifth lens 150 is convexly arranged toward the image surface at the circumference. The sixth lens 160 has negative optical power, and the curvature radius of the object surface side of the sixth lens 160 at the optical axis is positive, so the object surface side of the sixth lens 160 is convexly arranged toward the object surface at the optical axis, and the curvature radius of the image surface side of the sixth lens 160 at the optical axis is positive, so the image surface side of the sixth lens 160 is concavely arranged toward the image surface at the optical axis. The object surface side of the sixth lens 160 is convexly arranged toward the object surface at the circumference, and the image surface side of the sixth lens 160 is convexly arranged toward the image surface at the circumference.

[0160] Furthermore, the optical lens assembly 100 satisfies the following relationship:

[0161] f123 / f=1.421; f / EPD=1.85.

[0162] Wherein, f123 is the combined focal length of the first lens 110 , the second lens 120 and the third lens 130 , the total effective focal length of the optical lens assembly 100 is f, and the entrance pupil diameter of the optical lens assembly 100 is EPD.

[0163] By reasonably balancing the lens configuration, the relationship between the combined focal length of the first lens 110, the second lens 120, and the third lens 130 and the total effective focal length of the optical lens assembly 100 satisfies: f123 / f=1.421, which can effectively shorten the total optical length of the optical system, facilitate miniaturization of the optical system, and simultaneously avoid excessive increase of high-order spherical aberration, thereby improving the imaging quality of the optical system. When the relationship between the combined focal length of the first lens 110, the second lens 120, and the third lens 130 and the total effective focal length of the optical lens assembly 100 exceeds the above range, the total optical length of the optical system will be longer, which is not conducive to miniaturization of the optical system, and the high-order spherical aberration will be excessively increased, resulting in reduced imaging quality of the optical system.

[0164] When the total effective focal length of the optical lens assembly 100 and the entrance pupil diameter of the optical lens assembly 100 satisfy: f / EPD=1.85, the optical lens assembly 100 has the characteristic of a large aperture, thereby increasing the luminous flux per unit time of the optical system and enhancing the imaging effect of the optical system in a dark environment. When the total effective focal length of the optical lens assembly 100 and the entrance pupil diameter of the optical lens assembly 100 exceed the above range, the aperture of the optical lens assembly 100 is small, which reduces the luminous flux per unit time of the optical system, and also reduces the imaging effect of the optical system in a dark environment.

[0165] The optical lens assembly 100 satisfies the following relationship:

[0166] tan(HFOV) / SD11=0.625.

[0167] Wherein, HFOV is half of the maximum field of view of the optical lens assembly 100, and the maximum field of view is the field of view in the diagonal direction of the optical lens assembly 100, and SD11 is the effective semi-aperture of the object side of the first lens 110. When half of the maximum field of view of the optical lens assembly 100 and the effective semi-aperture of the object side of the first lens 110 satisfy the above relationship, the field of view displayed by the optical lens assembly 100 can be matched with the total length while satisfying the high quality of imaging of the optical lens assembly 100, thereby maintaining the miniaturization of the optical system.

[0168] The optical lens assembly 100 satisfies the following relationship:

[0169] f1 / f6=-0.58.

[0170] Wherein, f1 is the effective focal length of the first lens 110, and f6 is the effective focal length of the sixth lens 160. By controlling the ratio of the effective focal lengths of the first lens 110 and the sixth lens 160 to satisfy the above relationship, the optical power of the optical system can be reasonably allocated, the positive and negative spherical aberrations of the front lens group and the rear lens group can be offset, and the imaging quality of the optical system can be improved.

[0171] The optical lens assembly 100 satisfies the following relationship:

[0172] |f6| / R62=5.936.

[0173] Wherein, f6 is the effective focal length of the sixth lens 160, and R62 is the curvature radius of the image side surface of the sixth lens 160. By adjusting the curvature radius of the image side surface of the sixth lens 160 and the effective focal length of the sixth lens 160 to satisfy the above relationship, the deflection angle of the edge field light entering the photosensitive element can be effectively reduced, the matching degree between the optical lens assembly 100 and the photosensitive element can be increased, and the off-axis field astigmatism can be improved, thereby improving the imaging quality of the optical system.

[0174] The optical lens assembly 100 satisfies the following relationship:

[0175] CT4=0.876.

[0176] Wherein, CT4 is the thickness of the fourth lens 140 on the optical axis. Reasonable control of the center thickness of the fourth lens 140 so that the center thickness of the fourth lens 140 meets the above range can ensure good processability of the lens, reduce the sensitivity of the optical system, and control the field area of ​​the optical system within a reasonable range, which is conducive to the miniaturization of the optical system.

[0177] The optical lens assembly 100 satisfies the following relationship:

[0178] CT1 / (T12+T23)=2.281.

[0179] Wherein, CT1 is the thickness of the first lens 110 on the optical axis, T12 is the spacing distance between the first lens 110 and the second lens 120 on the optical axis, and T23 is the spacing distance between the second lens 120 and the third lens 130 on the optical axis. When the first lens 110, the second lens 120, and the third lens 130 are properly controlled to satisfy the above relationship, there can be enough space for the three lenses during assembly, and collision between the first lens 110 and the second lens 120, or between the second lens 120 and the third lens 130 can be avoided. In addition, shortening of CT1, T12, and T23 is beneficial to the thinning of the optical lens assembly 100, and can also avoid that their values ​​are too small to be unfavorable for assembly, increase the sensitivity of the optical system, and thus improve the imaging quality of the optical lens assembly 100.

[0180] The optical lens assembly 100 satisfies the following relationship:

[0181] (CT1+CT2+CT3) / TTL=0.261.

[0182] Wherein, CT1 is the thickness of the first lens 110 on the optical axis, CT2 is the thickness of the second lens 120 on the optical axis, CT3 is the center thickness of the third lens 130 on the optical axis, and TTL is the distance from the object side surface of the first lens 110 to the image plane on the optical axis. By controlling the thickness configuration of the first lens 110, the second lens 120, and the third lens 130, it is beneficial to reduce the sensitivity of the optical system while maintaining the miniaturization of the optical system.

[0183] The optical lens assembly 100 satisfies the following relationship:

[0184] |vd4-vd3|=36.39.

[0185] Wherein, vd3 is the Abbe number of the third lens 130, and vd4 is the Abbe number of the fourth lens 140. By properly selecting lens materials so that the Abbe numbers of the third lens 130 and the fourth lens 140 satisfy the above relationship, the chromatic aberration of the optical lens assembly 100 can be effectively corrected, the imaging clarity of the optical lens assembly 100 can be improved, and thus the imaging quality of the optical lens assembly 100 can be improved.

[0186] The optical lens assembly 100 satisfies the following relationship:

[0187] CT5 / |SAG51|=1.

[0188] Among them, CT5 is the thickness of the fifth lens 150 on the optical axis, and SAG51 is the horizontal displacement of the intersection of the object side of the fifth lens 150 on the optical axis to the maximum effective radius position of the object side of the fifth lens 150 on the optical axis, wherein the horizontal displacement is defined as positive toward the image side and negative toward the object side. By controlling the fifth lens 150 to satisfy the above relationship, the shape of the fifth lens 150 can be appropriately made to facilitate the manufacture and molding of the fifth lens 150, and reduce the defects of poor molding of the fifth lens 150. At the same time, the field area generated by the front lens group can be trimmed to ensure the balance of the field area of ​​the optical system and improve the imaging quality of the optical system.

[0189] The surface of the lens of the optical lens assembly 100 may be an aspherical surface. For the surface of these aspherical surfaces, the aspherical surface equation is:

[0190]

[0191] Where Z is the height of the lens surface parallel to the Z axis, r is the radial distance from the vertex, c is the curvature of the surface at the vertex, K is the cone constant, A4, A6, A8, A10 , A 12 They represent the aspheric coefficients of the 4th, 6th, 8th, 10th and 12th order respectively. In the embodiment of the present application, the cone constant K and aspheric coefficients corresponding to the surface of each aspheric surface are shown in Table 4:

[0192] Table 4

[0193]

[0194] Figure 4 1 and 2 are the spherochromatic aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the optical lens assembly 100 in the first embodiment.

[0195] Depend on Figure 4 It can be seen that the focal shifts of the spherical aberration corresponding to the wavelengths of 470.0000nm, 510.0000nm, 555.0000nm, 610.0000nm and 650.0000nm are all within 0.050 mm, indicating that the imaging quality of the embodiment of the present application is good, the astigmatism is well compensated, and the distortion is also well corrected.

[0196] Embodiment 3

[0197] The structural schematic diagram of the imaging optical lens assembly 100 of the embodiment of the present application is as follows Figure 5 The optical lens assembly 100 includes a first lens 110, a second lens 120, a third lens 130, a fourth lens 140, a fifth lens 150, and a sixth lens 160, which are arranged in sequence from the object plane to the image plane along the optical axis. The relevant parameters of the optical lens assembly 100 are shown in Table 5, where f is the focal length of the optical lens assembly 100, FNO represents the aperture value, HFOV represents half of the maximum field of view of the optical lens assembly 100, and the maximum field of view is the field of view in the diagonal direction of the optical lens assembly 100, TTL represents the distance from the object side surface of the first lens 110 to the image plane on the optical axis, and the units of the focal length, the radius of curvature, and the thickness are all in millimeters.

[0198] Table 5

[0199]

[0200] From Table 5 and Figure 5It can be known that in the embodiment of the present application, the first lens 110 has positive optical power, and the radius of curvature of the object plane side of the first lens 110 at the optical axis is positive, so the object plane side of the first lens 110 at the optical axis is convex toward the object plane, and the radius of curvature of the image plane side of the first lens 110 at the optical axis is positive, so the image plane side of the first lens 110 at the optical axis is concave toward the image plane. The object plane side of the first lens 110 at the circumference is convex toward the object plane, and the image plane side of the first lens 110 at the circumference is concave toward the image plane. The second lens 120 has negative optical power, and the radius of curvature of the object plane side of the second lens 120 at the optical axis is positive, so the object plane side of the second lens 120 at the optical axis is convex toward the object plane, and the radius of curvature of the image plane side of the second lens 120 at the optical axis is positive, so the image plane side of the second lens 120 at the optical axis is concave toward the image plane. The object surface side of the second lens 120 is convexly arranged toward the object surface at the circumference, and the image surface side of the second lens 120 is concavely arranged toward the image surface at the circumference. The third lens 130 has negative optical power, and the curvature radius of the object surface side of the third lens 130 at the optical axis is positive, so the object surface side of the third lens 130 is convexly arranged toward the object surface at the optical axis, and the curvature radius of the image surface side of the third lens 130 at the optical axis is positive, so the image surface side of the third lens 130 is concavely arranged toward the image surface at the optical axis. The object surface side of the third lens 130 is concavely arranged toward the object surface at the circumference, and the image surface side of the third lens 130 is convexly arranged toward the image surface at the circumference. The fourth lens 140 has positive power, and the radius of curvature of the object surface of the fourth lens 140 at the optical axis is negative, so the object surface of the fourth lens 140 at the optical axis is concave toward the object surface, and the radius of curvature of the image surface of the fourth lens 140 at the optical axis is negative, so the image surface of the fourth lens 140 at the optical axis is convex toward the image surface. The object surface of the fourth lens 140 at the circumference is concave toward the object surface, and the image surface of the fourth lens 140 at the circumference is convex toward the image surface. The fifth lens 150 has positive power, and the radius of curvature of the object surface of the fifth lens 150 at the optical axis is positive, so the object surface of the fifth lens 150 at the optical axis is convex toward the object surface, and the radius of curvature of the image surface of the fifth lens 150 at the optical axis is positive, so the image surface of the fifth lens 150 at the optical axis is concave toward the image surface. The object surface side of the fifth lens 150 is concavely arranged toward the object surface at the circumference, and the image surface side of the fifth lens 150 is convexly arranged toward the image surface at the circumference. The sixth lens 160 has negative optical power, and the curvature radius of the object surface side of the sixth lens 160 at the optical axis is positive, so the object surface side of the sixth lens 160 is convexly arranged toward the object surface at the optical axis, and the curvature radius of the image surface side of the sixth lens 160 at the optical axis is positive, so the image surface side of the sixth lens 160 is concavely arranged toward the image surface at the optical axis. The object surface side of the sixth lens 160 is concavely arranged toward the object surface at the circumference, and the image surface side of the sixth lens 160 is convexly arranged toward the image surface at the circumference.

[0201] Furthermore, the optical lens assembly 100 satisfies the following relationship:

[0202] f123 / f=1.504; f / EPD=2.

[0203] Wherein, f123 is the combined focal length of the first lens 110 , the second lens 120 and the third lens 130 , the total effective focal length of the optical lens assembly 100 is f, and the entrance pupil diameter of the optical lens assembly 100 is EPD.

[0204] By reasonably balancing the lens configuration, the relationship between the combined focal length of the first lens 110, the second lens 120, and the third lens 130 and the total effective focal length of the optical lens assembly 100 satisfies: f123 / f=1.504, which can effectively shorten the total optical length of the optical system, facilitate miniaturization of the optical system, and simultaneously avoid excessive increase of high-order spherical aberration, thereby improving the imaging quality of the optical system. When the relationship between the combined focal length of the first lens 110, the second lens 120, and the third lens 130 and the total effective focal length of the optical lens assembly 100 exceeds the above range, the total optical length of the optical system will be longer, which is not conducive to miniaturization of the optical system, and the high-order spherical aberration will be excessively increased, resulting in reduced imaging quality of the optical system.

[0205] When the total effective focal length of the optical lens assembly 100 and the entrance pupil diameter of the optical lens assembly 100 satisfy: f / EPD=2, the optical lens assembly 100 has the characteristic of a large aperture, thereby increasing the luminous flux per unit time of the optical system and enhancing the imaging effect of the optical system in a dark environment. When the total effective focal length of the optical lens assembly 100 and the entrance pupil diameter of the optical lens assembly 100 exceed the above range, the aperture of the optical lens assembly 100 is small, which reduces the luminous flux per unit time of the optical system, and also reduces the imaging effect of the optical system in a dark environment.

[0206] The optical lens assembly 100 satisfies the following relationship:

[0207] tan(HFOV) / SD11=0.818.

[0208] Wherein, HFOV is half of the maximum field of view of the optical lens assembly 100, and the maximum field of view is the field of view in the diagonal direction of the optical lens assembly 100, and SD11 is the effective semi-aperture of the object side of the first lens 110. When half of the maximum field of view of the optical lens assembly 100 and the effective semi-aperture of the object side of the first lens 110 satisfy the above relationship, the field of view displayed by the optical lens assembly 100 can be matched with the total length while satisfying the high quality of imaging of the optical lens assembly 100, thereby maintaining the miniaturization of the optical system.

[0209] The optical lens assembly 100 satisfies the following relationship:

[0210] f1 / f6=-0.57.

[0211] Wherein, f1 is the effective focal length of the first lens 110, and f6 is the effective focal length of the sixth lens 160. By controlling the ratio of the effective focal lengths of the first lens 110 and the sixth lens 160 to satisfy the above relationship, the optical power of the optical system can be reasonably allocated, the positive and negative spherical aberrations of the front lens group and the rear lens group can be offset, and the imaging quality of the optical system can be improved.

[0212] The optical lens assembly 100 satisfies the following relationship:

[0213] |f6| / R62=5.966.

[0214] Wherein, f6 is the effective focal length of the sixth lens 160, and R62 is the curvature radius of the image side surface of the sixth lens 160. By adjusting the curvature radius of the image side surface of the sixth lens 160 and the effective focal length of the sixth lens 160 to satisfy the above relationship, the deflection angle of the edge field light entering the photosensitive element can be effectively reduced, the matching degree between the optical lens assembly 100 and the photosensitive element can be increased, and the off-axis field astigmatism can be improved, thereby improving the imaging quality of the optical system.

[0215] The optical lens assembly 100 satisfies the following relationship:

[0216] CT4=0.59.

[0217] Wherein, CT4 is the thickness of the fourth lens 140 on the optical axis. Reasonable control of the center thickness of the fourth lens 140 so that the center thickness of the fourth lens 140 meets the above range can ensure good processability of the lens, reduce the sensitivity of the optical system, and control the field area of ​​the optical system within a reasonable range, which is conducive to the miniaturization of the optical system.

[0218] The optical lens assembly 100 satisfies the following relationship:

[0219] CT1 / (T12+T23)=2.014.

[0220] Wherein, CT1 is the thickness of the first lens 110 on the optical axis, T12 is the spacing distance between the first lens 110 and the second lens 120 on the optical axis, and T23 is the spacing distance between the second lens 120 and the third lens 130 on the optical axis. When the first lens 110, the second lens 120, and the third lens 130 are properly controlled to satisfy the above relationship, there can be enough space for the three lenses during assembly, and collision between the first lens 110 and the second lens 120, or between the second lens 120 and the third lens 130 can be avoided. In addition, shortening of CT1, T12, and T23 is beneficial to the thinning of the optical lens assembly 100, and can also avoid that their values ​​are too small to be unfavorable for assembly, increase the sensitivity of the optical system, and thus improve the imaging quality of the optical lens assembly 100.

[0221] The optical lens assembly 100 satisfies the following relationship:

[0222] (CT1+CT2+CT3) / TTL=0.211.

[0223] Wherein, CT1 is the thickness of the first lens 110 on the optical axis, CT2 is the thickness of the second lens 120 on the optical axis, CT3 is the center thickness of the third lens 130 on the optical axis, and TTL is the distance from the object side surface of the first lens 110 to the image plane on the optical axis. By controlling the thickness configuration of the first lens 110, the second lens 120, and the third lens 130, it is beneficial to reduce the sensitivity of the optical system while maintaining the miniaturization of the optical system.

[0224] The optical lens assembly 100 satisfies the following relationship:

[0225] |vd4-vd3|=39.34.

[0226] Wherein, vd3 is the Abbe number of the third lens 130, and vd4 is the Abbe number of the fourth lens 140. By properly selecting lens materials so that the Abbe numbers of the third lens 130 and the fourth lens 140 satisfy the above relationship, the chromatic aberration of the optical lens assembly 100 can be effectively corrected, the imaging clarity of the optical lens assembly 100 can be improved, and thus the imaging quality of the optical lens assembly 100 can be improved.

[0227] The optical lens assembly 100 satisfies the following relationship:

[0228] CT5 / |SAG51|=1.82.

[0229] Among them, CT5 is the thickness of the fifth lens 150 on the optical axis, and SAG51 is the horizontal displacement of the intersection of the object side of the fifth lens 150 on the optical axis to the maximum effective radius position of the object side of the fifth lens 150 on the optical axis, wherein the horizontal displacement is defined as positive toward the image side and negative toward the object side. By controlling the fifth lens 150 to satisfy the above relationship, the shape of the fifth lens 150 can be appropriately made to facilitate the manufacture and molding of the fifth lens 150, and reduce the defects of poor molding of the fifth lens 150. At the same time, the field area generated by the front lens group can be trimmed to ensure the balance of the field area of ​​the optical system and improve the imaging quality of the optical system.

[0230] The surface of the lens of the optical lens assembly 100 may be an aspherical surface. For the surface of these aspherical surfaces, the aspherical surface equation is:

[0231]

[0232] Where Z is the height of the lens surface parallel to the Z axis, r is the radial distance from the vertex, c is the curvature of the surface at the vertex, K is the cone constant, A4, A6, A8, A10 , A 12 They represent the aspheric coefficients of the 4th, 6th, 8th, 10th and 12th order respectively. In the embodiment of the present application, the cone constant K and the aspheric coefficients corresponding to the surface of each aspheric surface are shown in Table 6:

[0233] Table 6

[0234]

[0235]

[0236] Figure 6 1 and 2 are the spherochromatic aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the optical lens assembly 100 in the first embodiment.

[0237] Depend on Figure 6 It can be seen that the focal shifts of the spherical aberration corresponding to the wavelengths of 470.0000nm, 510.0000nm, 555.0000nm, 610.0000nm and 650.0000nm are all within 0.020 mm, indicating that the imaging quality of the embodiment of the present application is good, the astigmatism is well compensated, and the distortion is also well corrected.

[0238] Embodiment 4

[0239] The structural schematic diagram of the imaging optical lens assembly 100 of the embodiment of the present application is as follows Figure 7 The optical lens assembly 100 includes a first lens 110, a second lens 120, a third lens 130, a fourth lens 140, a fifth lens 150, and a sixth lens 160, which are sequentially arranged along the optical axis from the object plane to the image plane. The relevant parameters of the optical lens assembly 100 are shown in Table 7, where f is the focal length of the optical lens assembly 100, FNO represents the aperture value, HFOV represents half of the maximum field of view of the optical lens assembly 100, and the maximum field of view is the field of view in the diagonal direction of the optical lens assembly 100, TTL represents the distance from the object side surface of the first lens 110 to the image plane on the optical axis, and the units of the focal length, the radius of curvature, and the thickness are all in millimeters.

[0240] Table 7

[0241]

[0242]

[0243] From Table 7 and Figure 7It can be known that in the embodiment of the present application, the first lens 110 has positive optical power, and the radius of curvature of the object plane side of the first lens 110 at the optical axis is positive, so the object plane side of the first lens 110 at the optical axis is convex toward the object plane, and the radius of curvature of the image plane side of the first lens 110 at the optical axis is positive, so the image plane side of the first lens 110 at the optical axis is concave toward the image plane. The object plane side of the first lens 110 at the circumference is convex toward the object plane, and the image plane side of the first lens 110 at the circumference is concave toward the image plane. The second lens 120 has negative optical power, and the radius of curvature of the object plane side of the second lens 120 at the optical axis is positive, so the object plane side of the second lens 120 at the optical axis is convex toward the object plane, and the radius of curvature of the image plane side of the second lens 120 at the optical axis is positive, so the image plane side of the second lens 120 at the optical axis is concave toward the image plane. The object surface side of the second lens 120 is convexly arranged toward the object surface at the circumference, and the image surface side of the second lens 120 is concavely arranged toward the image surface at the circumference. The third lens 130 has positive optical power, and the curvature radius of the object surface side of the third lens 130 at the optical axis is positive, so the object surface side of the third lens 130 is convexly arranged toward the object surface at the optical axis, and the curvature radius of the image surface side of the third lens 130 at the optical axis is positive, so the image surface side of the third lens 130 is concavely arranged toward the image surface at the optical axis. The object surface side of the third lens 130 is concavely arranged toward the object surface at the circumference, and the image surface side of the third lens 130 is convexly arranged toward the image surface at the circumference. The fourth lens 140 has positive power, and the radius of curvature of the object surface of the fourth lens 140 at the optical axis is negative, so the object surface of the fourth lens 140 at the optical axis is concave toward the object surface, and the radius of curvature of the image surface of the fourth lens 140 at the optical axis is negative, so the image surface of the fourth lens 140 at the optical axis is convex toward the image surface. The object surface of the fourth lens 140 at the circumference is convex toward the object surface, and the image surface of the fourth lens 140 at the circumference is convex toward the image surface. The fifth lens 150 has negative power, and the radius of curvature of the object surface of the fifth lens 150 at the optical axis is positive, so the object surface of the fifth lens 150 at the optical axis is convex toward the object surface, and the radius of curvature of the image surface of the fifth lens 150 at the optical axis is positive, so the image surface of the fifth lens 150 at the optical axis is concave toward the image surface. The object surface side of the fifth lens 150 is concavely arranged toward the object surface at the circumference, and the image surface side of the fifth lens 150 is convexly arranged toward the image surface at the circumference. The sixth lens 160 has negative optical power, and the curvature radius of the object surface side of the sixth lens 160 at the optical axis is positive, so the object surface side of the sixth lens 160 is convexly arranged toward the object surface at the optical axis, and the curvature radius of the image surface side of the sixth lens 160 at the optical axis is positive, so the image surface side of the sixth lens 160 is concavely arranged toward the image surface at the optical axis. The object surface side of the sixth lens 160 is concavely arranged toward the object surface at the circumference, and the image surface side of the sixth lens 160 is convexly arranged toward the image surface at the circumference.

[0244] Furthermore, the optical lens assembly 100 satisfies the following relationship:

[0245] f123 / f=1.124; f / EPD=1.93.

[0246] Wherein, f123 is the combined focal length of the first lens 110 , the second lens 120 and the third lens 130 , the total effective focal length of the optical lens assembly 100 is f, and the entrance pupil diameter of the optical lens assembly 100 is EPD.

[0247] By reasonably balancing the lens configuration, the relationship between the combined focal length of the first lens 110, the second lens 120, and the third lens 130 and the total effective focal length of the optical lens assembly 100 satisfies: f123 / f=1.124, which can effectively shorten the total optical length of the optical system, facilitate miniaturization of the optical system, and simultaneously avoid excessive increase of high-order spherical aberration, thereby improving the imaging quality of the optical system. When the relationship between the combined focal length of the first lens 110, the second lens 120, and the third lens 130 and the total effective focal length of the optical lens assembly 100 exceeds the above range, the total optical length of the optical system will be longer, which is not conducive to miniaturization of the optical system, and the high-order spherical aberration will be excessively increased, resulting in reduced imaging quality of the optical system.

[0248] When the total effective focal length of the optical lens assembly 100 and the entrance pupil diameter of the optical lens assembly 100 satisfy: f / EPD=1.93, the optical lens assembly 100 has the characteristic of a large aperture, thereby increasing the luminous flux per unit time of the optical system and enhancing the imaging effect of the optical system in a dark environment. When the total effective focal length of the optical lens assembly 100 and the entrance pupil diameter of the optical lens assembly 100 exceed the above range, the aperture of the optical lens assembly 100 is small, which reduces the luminous flux per unit time of the optical system, and also reduces the imaging effect of the optical system in a dark environment.

[0249] The optical lens assembly 100 satisfies the following relationship:

[0250] tan(HFOV) / SD11=0.668.

[0251] Wherein, HFOV is half of the maximum field of view of the optical lens assembly 100, and the maximum field of view is the field of view in the diagonal direction of the optical lens assembly 100, and SD11 is the effective semi-aperture of the object side of the first lens 110. When half of the maximum field of view of the optical lens assembly 100 and the effective semi-aperture of the object side of the first lens 110 satisfy the above relationship, the field of view displayed by the optical lens assembly 100 can be matched with the total length while satisfying the high quality of imaging of the optical lens assembly 100, thereby maintaining the miniaturization of the optical system.

[0252] The optical lens assembly 100 satisfies the following relationship:

[0253] f1 / f6=-0.41.

[0254] Wherein, f1 is the effective focal length of the first lens 110, and f6 is the effective focal length of the sixth lens 160. By controlling the ratio of the effective focal lengths of the first lens 110 and the sixth lens 160 to satisfy the above relationship, the optical power of the optical system can be reasonably allocated, the positive and negative spherical aberrations of the front lens group and the rear lens group can be offset, and the imaging quality of the optical system can be improved.

[0255] The optical lens assembly 100 satisfies the following relationship:

[0256] |f6| / R62=5.917.

[0257] Wherein, f6 is the effective focal length of the sixth lens 160, and R62 is the curvature radius of the image side surface of the sixth lens 160. By adjusting the curvature radius of the image side surface of the sixth lens 160 and the effective focal length of the sixth lens 160 to satisfy the above relationship, the deflection angle of the edge field light entering the photosensitive element can be effectively reduced, the matching degree between the optical lens assembly 100 and the photosensitive element can be increased, and the off-axis field astigmatism can be improved, thereby improving the imaging quality of the optical system.

[0258] The optical lens assembly 100 satisfies the following relationship:

[0259] CT4=0.46.

[0260] Wherein, CT4 is the thickness of the fourth lens 140 on the optical axis. Reasonable control of the center thickness of the fourth lens 140 so that the center thickness of the fourth lens 140 meets the above range can ensure good processability of the lens, reduce the sensitivity of the optical system, and control the field area of ​​the optical system within a reasonable range, which is conducive to the miniaturization of the optical system.

[0261] The optical lens assembly 100 satisfies the following relationship:

[0262] CT1 / (T12+T23)=2.725.

[0263] Wherein, CT1 is the thickness of the first lens 110 on the optical axis, T12 is the spacing distance between the first lens 110 and the second lens 120 on the optical axis, and T23 is the spacing distance between the second lens 120 and the third lens 130 on the optical axis. When the first lens 110, the second lens 120, and the third lens 130 are properly controlled to satisfy the above relationship, there can be enough space for the three lenses during assembly, and collision between the first lens 110 and the second lens 120, or between the second lens 120 and the third lens 130 can be avoided. In addition, shortening of CT1, T12, and T23 is beneficial to the thinning of the optical lens assembly 100, and can also avoid that their values ​​are too small to be unfavorable for assembly, increase the sensitivity of the optical system, and thus improve the imaging quality of the optical lens assembly 100.

[0264] The optical lens assembly 100 satisfies the following relationship:

[0265] (CT1+CT2+CT3) / TTL=0.239.

[0266] Wherein, CT1 is the thickness of the first lens 110 on the optical axis, CT2 is the thickness of the second lens 120 on the optical axis, CT3 is the center thickness of the third lens 130 on the optical axis, and TTL is the distance from the object side surface of the first lens 110 to the image plane on the optical axis. By controlling the thickness configuration of the first lens 110, the second lens 120, and the third lens 130, it is beneficial to reduce the sensitivity of the optical system while maintaining the miniaturization of the optical system.

[0267] The optical lens assembly 100 satisfies the following relationship:

[0268] |vd4-vd3|=35.56.

[0269] Wherein, vd3 is the Abbe number of the third lens 130, and vd4 is the Abbe number of the fourth lens 140. By properly selecting lens materials so that the Abbe numbers of the third lens 130 and the fourth lens 140 satisfy the above relationship, the chromatic aberration of the optical lens assembly 100 can be effectively corrected, the imaging clarity of the optical lens assembly 100 can be improved, and thus the imaging quality of the optical lens assembly 100 can be improved.

[0270] The optical lens assembly 100 satisfies the following relationship:

[0271] CT5 / |SAG51|=0.58.

[0272] Among them, CT5 is the thickness of the fifth lens 150 on the optical axis, and SAG51 is the horizontal displacement of the intersection of the object side of the fifth lens 150 on the optical axis to the maximum effective radius position of the object side of the fifth lens 150 on the optical axis, wherein the horizontal displacement is defined as positive toward the image side and negative toward the object side. By controlling the fifth lens 150 to satisfy the above relationship, the shape of the fifth lens 150 can be appropriately made to facilitate the manufacture and molding of the fifth lens 150, and reduce the defects of poor molding of the fifth lens 150. At the same time, the field area generated by the front lens group can be trimmed to ensure the balance of the field area of ​​the optical system and improve the imaging quality of the optical system.

[0273] The surface of the lens of the optical lens assembly 100 may be an aspherical surface. For the surface of these aspherical surfaces, the aspherical surface equation is:

[0274]

[0275] Where Z is the height of the lens surface parallel to the Z axis, r is the radial distance from the vertex, c is the curvature of the surface at the vertex, K is the cone constant, A4, A6, A8, A10 , A 12 They represent the aspheric coefficients of the 4th, 6th, 8th, 10th and 12th order respectively. In the embodiment of the present application, the cone constant K and aspheric coefficients corresponding to the surface of each aspheric surface are shown in Table 8:

[0276] Table 8

[0277]

[0278]

[0279] Figure 8 1 and 2 are the spherochromatic aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the optical lens assembly 100 in the first embodiment.

[0280] Depend on Figure 8 It can be seen that the focal shifts of the spherical aberration corresponding to the wavelengths of 470.0000nm, 510.0000nm, 555.0000nm, 610.0000nm and 650.0000nm are all within 0.050 mm, indicating that the imaging quality of the embodiment of the present application is good, the astigmatism is well compensated, and the distortion is also well corrected.

[0281] Embodiment 5

[0282] The structural schematic diagram of the imaging optical lens assembly 100 of the embodiment of the present application is as follows Fig. 9 The optical lens assembly 100 includes a first lens 110, a second lens 120, a third lens 130, a fourth lens 140, a fifth lens 150, and a sixth lens 160, which are sequentially arranged along the optical axis from the object plane to the image plane. The relevant parameters of the optical lens assembly 100 are shown in Table 9, where f is the focal length of the optical lens assembly 100, FNO represents the aperture value, HFOV represents half of the maximum field of view of the optical lens assembly 100, and the maximum field of view is the field of view in the diagonal direction of the optical lens assembly 100, TTL represents the distance from the object side surface of the first lens 110 to the image plane on the optical axis, and the units of the focal length, the radius of curvature, and the thickness are all in millimeters.

[0283] Table 9

[0284]

[0285]

[0286] From Table 9 and Fig. 9It can be seen that in the embodiment of the present application, the first lens 110 has positive optical power, and the radius of curvature of the object plane of the first lens 110 at the optical axis is positive, so the object plane of the first lens 110 at the optical axis is convex toward the object plane, and the radius of curvature of the image plane of the first lens 110 at the optical axis is positive, so the image plane of the first lens 110 at the optical axis is concave toward the image plane. The object plane of the first lens 110 at the circumference is convex toward the object plane, and the image plane of the first lens 110 at the circumference is concave toward the image plane. The second lens 120 has positive optical power, and the radius of curvature of the object plane of the second lens 120 at the optical axis is positive, so the object plane of the second lens 120 at the optical axis is convex toward the object plane, and the radius of curvature of the image plane of the second lens 120 at the optical axis is negative, so the image plane of the second lens 120 at the optical axis is convex toward the image plane. The object surface side of the second lens 120 is convexly arranged toward the object surface at the circumference, and the image surface side of the second lens 120 is convexly arranged toward the image surface at the circumference. The third lens 130 has negative optical power, and the curvature radius of the object surface side of the third lens 130 at the optical axis is positive, so the object surface side of the third lens 130 is convexly arranged toward the object surface at the optical axis, and the curvature radius of the image surface side of the third lens 130 at the optical axis is positive, so the image surface side of the third lens 130 is concavely arranged toward the image surface at the optical axis. The object surface side of the third lens 130 is concavely arranged toward the object surface at the circumference, and the image surface side of the third lens 130 is concavely arranged toward the image surface at the circumference. The fourth lens 140 has positive power, and the radius of curvature of the object surface of the fourth lens 140 at the optical axis is negative, so the object surface of the fourth lens 140 at the optical axis is concave toward the object surface, and the radius of curvature of the image surface of the fourth lens 140 at the optical axis is negative, so the image surface of the fourth lens 140 at the optical axis is convex toward the image surface. The object surface of the fourth lens 140 at the circumference is concave toward the object surface, and the image surface of the fourth lens 140 at the circumference is convex toward the image surface. The fifth lens 150 has positive power, and the radius of curvature of the object surface of the fifth lens 150 at the optical axis is positive, so the object surface of the fifth lens 150 at the optical axis is convex toward the object surface, and the radius of curvature of the image surface of the fifth lens 150 at the optical axis is positive, so the image surface of the fifth lens 150 at the optical axis is concave toward the image surface. The object surface side of the fifth lens 150 is concavely arranged toward the object surface at the circumference, and the image surface side of the fifth lens 150 is convexly arranged toward the image surface at the circumference. The sixth lens 160 has negative optical power, and the curvature radius of the object surface side of the sixth lens 160 at the optical axis is positive, so the object surface side of the sixth lens 160 is convexly arranged toward the object surface at the optical axis, and the curvature radius of the image surface side of the sixth lens 160 at the optical axis is positive, so the image surface side of the sixth lens 160 is concavely arranged toward the image surface at the optical axis. The object surface side of the sixth lens 160 is concavely arranged toward the object surface at the circumference, and the image surface side of the sixth lens 160 is convexly arranged toward the image surface at the circumference.

[0287] Furthermore, the optical lens assembly 100 satisfies the following relationship:

[0288] f123 / f=1.34; f / EPD=1.59.

[0289] Wherein, f123 is the combined focal length of the first lens 110 , the second lens 120 and the third lens 130 , the total effective focal length of the optical lens assembly 100 is f, and the entrance pupil diameter of the optical lens assembly 100 is EPD.

[0290] By reasonably balancing the lens configuration, the relationship between the combined focal length of the first lens 110, the second lens 120, and the third lens 130 and the total effective focal length of the optical lens assembly 100 satisfies: f123 / f=1.34, which can effectively shorten the total optical length of the optical system, facilitate miniaturization of the optical system, and simultaneously avoid excessive increase of high-order spherical aberration, thereby improving the imaging quality of the optical system. When the relationship between the combined focal length of the first lens 110, the second lens 120, and the third lens 130 and the total effective focal length of the optical lens assembly 100 exceeds the above range, the total optical length of the optical system will be longer, which is not conducive to miniaturization of the optical system, and the high-order spherical aberration will be excessively increased, resulting in reduced imaging quality of the optical system.

[0291] When the total effective focal length of the optical lens assembly 100 and the entrance pupil diameter of the optical lens assembly 100 satisfy: f / EPD=1.59, the optical lens assembly 100 has the characteristic of a large aperture, thereby increasing the luminous flux per unit time of the optical system and enhancing the imaging effect of the optical system in a dark environment. When the total effective focal length of the optical lens assembly 100 and the entrance pupil diameter of the optical lens assembly 100 exceed the above range, the aperture of the optical lens assembly 100 is small, which reduces the luminous flux per unit time of the optical system, and also reduces the imaging effect of the optical system in a dark environment.

[0292] The optical lens assembly 100 satisfies the following relationship:

[0293] tan(HFOV) / SD11=0.573.

[0294] Wherein, HFOV is half of the maximum field of view of the optical lens assembly 100, and the maximum field of view is the field of view in the diagonal direction of the optical lens assembly 100, and SD11 is the effective semi-aperture of the object side of the first lens 110. When half of the maximum field of view of the optical lens assembly 100 and the effective semi-aperture of the object side of the first lens 110 satisfy the above relationship, the field of view displayed by the optical lens assembly 100 can be matched with the total length while satisfying the high quality of imaging of the optical lens assembly 100, thereby maintaining the miniaturization of the optical system.

[0295] The optical lens assembly 100 satisfies the following relationship:

[0296] f1 / f6=-0.82.

[0297] Wherein, f1 is the effective focal length of the first lens 110, and f6 is the effective focal length of the sixth lens 160. By controlling the ratio of the effective focal lengths of the first lens 110 and the sixth lens 160 to satisfy the above relationship, the optical power of the optical system can be reasonably allocated, the positive and negative spherical aberrations of the front lens group and the rear lens group can be offset, and the imaging quality of the optical system can be improved.

[0298] The optical lens assembly 100 satisfies the following relationship:

[0299] |f6| / R62=7.101.

[0300] Wherein, f6 is the effective focal length of the sixth lens 160, and R62 is the curvature radius of the image side surface of the sixth lens 160. By adjusting the curvature radius of the image side surface of the sixth lens 160 and the effective focal length of the sixth lens 160 to satisfy the above relationship, the deflection angle of the edge field light entering the photosensitive element can be effectively reduced, the matching degree between the optical lens assembly 100 and the photosensitive element can be increased, and the off-axis field astigmatism can be improved, thereby improving the imaging quality of the optical system.

[0301] The optical lens assembly 100 satisfies the following relationship:

[0302] CT4=0.48.

[0303] Wherein, CT4 is the thickness of the fourth lens 140 on the optical axis. Reasonable control of the center thickness of the fourth lens 140 so that the center thickness of the fourth lens 140 meets the above range can ensure good processability of the lens, reduce the sensitivity of the optical system, and control the field area of ​​the optical system within a reasonable range, which is conducive to the miniaturization of the optical system.

[0304] The optical lens assembly 100 satisfies the following relationship:

[0305] CT1 / (T12+T23)=2.053.

[0306] Wherein, CT1 is the thickness of the first lens 110 on the optical axis, T12 is the spacing distance between the first lens 110 and the second lens 120 on the optical axis, and T23 is the spacing distance between the second lens 120 and the third lens 130 on the optical axis. When the first lens 110, the second lens 120, and the third lens 130 are properly controlled to satisfy the above relationship, there can be enough space for the three lenses during assembly, and collision between the first lens 110 and the second lens 120, or between the second lens 120 and the third lens 130 can be avoided. In addition, shortening of CT1, T12, and T23 is beneficial to the thinning of the optical lens assembly 100, and can also avoid that their values ​​are too small to be unfavorable for assembly, increase the sensitivity of the optical system, and thus improve the imaging quality of the optical lens assembly 100.

[0307] The optical lens assembly 100 satisfies the following relationship:

[0308] (CT1+CT2+CT3) / TTL=0.237.

[0309] Wherein, CT1 is the thickness of the first lens 110 on the optical axis, CT2 is the thickness of the second lens 120 on the optical axis, CT3 is the center thickness of the third lens 130 on the optical axis, and TTL is the distance from the object side surface of the first lens 110 to the image plane on the optical axis. By controlling the thickness configuration of the first lens 110, the second lens 120, and the third lens 130, it is beneficial to reduce the sensitivity of the optical system while maintaining the miniaturization of the optical system.

[0310] The optical lens assembly 100 satisfies the following relationship:

[0311] |vd4-vd3|=4.57.

[0312] Wherein, vd3 is the Abbe number of the third lens 130, and vd4 is the Abbe number of the fourth lens 140. By properly selecting lens materials so that the Abbe numbers of the third lens 130 and the fourth lens 140 satisfy the above relationship, the chromatic aberration of the optical lens assembly 100 can be effectively corrected, the imaging clarity of the optical lens assembly 100 can be improved, and thus the imaging quality of the optical lens assembly 100 can be improved.

[0313] The optical lens assembly 100 satisfies the following relationship:

[0314] CT5 / |SAG51|=1.53.

[0315] Among them, CT5 is the thickness of the fifth lens 150 on the optical axis, and SAG51 is the horizontal displacement of the intersection of the object side of the fifth lens 150 on the optical axis to the maximum effective radius position of the object side of the fifth lens 150 on the optical axis, wherein the horizontal displacement is defined as positive toward the image side and negative toward the object side. By controlling the fifth lens 150 to satisfy the above relationship, the shape of the fifth lens 150 can be appropriately made to facilitate the manufacture and molding of the fifth lens 150, and reduce the defects of poor molding of the fifth lens 150. At the same time, the field area generated by the front lens group can be trimmed to ensure the balance of the field area of ​​the optical system and improve the imaging quality of the optical system.

[0316] The surface of the lens of the optical lens assembly 100 may be an aspherical surface. For the surface of these aspherical surfaces, the aspherical surface equation is:

[0317]

[0318] Where Z is the height of the lens surface parallel to the Z axis, r is the radial distance from the vertex, c is the curvature of the surface at the vertex, K is the cone constant, A4, A6, A8, A10 , A 12 They represent the aspheric coefficients of the 4th, 6th, 8th, 10th and 12th order respectively. In the embodiment of the present application, the cone constant K and aspheric coefficients corresponding to the surface of each aspheric surface are shown in Table 10:

[0319] Table 10

[0320]

[0321] Fig.10 1 and 2 are the spherochromatic aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the optical lens assembly 100 in the first embodiment.

[0322] Depend on Fig.10 It can be seen that the focal shifts of the spherical aberration corresponding to the wavelengths of 470.0000nm, 510.0000nm, 555.0000nm, 610.0000nm and 650.0000nm are all within 0.050 mm, indicating that the imaging quality of the embodiment of the present application is good, the astigmatism is well compensated, and the distortion is also well corrected.

[0323] Embodiment 6

[0324] The structural schematic diagram of the imaging optical lens assembly 100 of the embodiment of the present application is as follows Fig.11 The optical lens assembly 100 includes a first lens 110, a second lens 120, a third lens 130, a fourth lens 140, a fifth lens 150, and a sixth lens 160 which are sequentially arranged along the optical axis from the object plane to the image plane. The relevant parameters of the optical lens assembly 100 are shown in Table 11, where f is the focal length of the optical lens assembly 100, FNO represents the aperture value, HFOV represents half of the maximum field of view of the optical lens assembly 100, and the maximum field of view is the field of view in the diagonal direction of the optical lens assembly 100, TTL represents the distance from the object side surface of the first lens 110 to the image plane on the optical axis, and the units of the focal length, the radius of curvature, and the thickness are all in millimeters.

[0325] Table 11

[0326]

[0327] From Table 11 and Fig.11It can be seen that in the embodiment of the present application, the first lens 110 has positive optical power, and the radius of curvature of the object plane of the first lens 110 at the optical axis is positive, so the object plane of the first lens 110 at the optical axis is convex toward the object plane, and the radius of curvature of the image plane of the first lens 110 at the optical axis is positive, so the image plane of the first lens 110 at the optical axis is concave toward the image plane. The object plane of the first lens 110 at the circumference is convex toward the object plane, and the image plane of the first lens 110 at the circumference is convex toward the image plane. The second lens 120 has negative optical power, and the radius of curvature of the object plane of the second lens 120 at the optical axis is positive, so the object plane of the second lens 120 at the optical axis is convex toward the object plane, and the radius of curvature of the image plane of the second lens 120 at the optical axis is positive, so the image plane of the second lens 120 at the optical axis is concave toward the image plane. The object surface side of the second lens 120 is convexly arranged toward the object surface at the circumference, and the image surface side of the second lens 120 is concavely arranged toward the image surface at the circumference. The third lens 130 has positive optical power, and the curvature radius of the object surface side of the third lens 130 at the optical axis is positive, so the object surface side of the third lens 130 is convexly arranged toward the object surface at the optical axis, and the curvature radius of the image surface side of the third lens 130 at the optical axis is positive, so the image surface side of the third lens 130 is concavely arranged toward the image surface at the optical axis. The object surface side of the third lens 130 is concavely arranged toward the object surface at the circumference, and the image surface side of the third lens 130 is convexly arranged toward the image surface at the circumference. The fourth lens 140 has positive refractive power, and the radius of curvature of the object surface of the fourth lens 140 at the optical axis is positive, so the object surface of the fourth lens 140 at the optical axis is convex toward the object surface, and the radius of curvature of the image surface of the fourth lens 140 at the optical axis is positive, so the image surface of the fourth lens 140 at the optical axis is concave toward the image surface. The object surface of the fourth lens 140 is concave toward the object surface at the circumference, and the image surface of the fourth lens 140 is concave toward the image surface at the circumference. The fifth lens 150 has positive refractive power, and the radius of curvature of the object surface of the fifth lens 150 at the optical axis is positive, so the object surface of the fifth lens 150 at the optical axis is convex toward the object surface, and the radius of curvature of the image surface of the fifth lens 150 at the optical axis is negative, so the image surface of the fifth lens 150 at the optical axis is convex toward the image surface. The object surface side of the fifth lens 150 is concavely arranged toward the object surface at the circumference, and the image surface side of the fifth lens 150 is convexly arranged toward the image surface at the circumference. The sixth lens 160 has negative optical power, and the radius of curvature of the object surface side of the sixth lens 160 at the optical axis is negative, so the object surface side of the sixth lens 160 is concavely arranged toward the object surface at the optical axis, and the radius of curvature of the image surface side of the sixth lens 160 at the optical axis is positive, so the image surface side of the sixth lens 160 is concavely arranged toward the image surface at the optical axis. The object surface side of the sixth lens 160 is concavely arranged toward the object surface at the circumference, and the image surface side of the sixth lens 160 is convexly arranged toward the image surface at the circumference.

[0328] Furthermore, the optical lens assembly 100 satisfies the following relationship:

[0329] f123 / f=1.247; f / EPD=1.82.

[0330] Wherein, f123 is the combined focal length of the first lens 110 , the second lens 120 and the third lens 130 , the total effective focal length of the optical lens assembly 100 is f, and the entrance pupil diameter of the optical lens assembly 100 is EPD.

[0331] By reasonably balancing the lens configuration, the relationship between the combined focal length of the first lens 110, the second lens 120, and the third lens 130 and the total effective focal length of the optical lens assembly 100 satisfies: f123 / f=1.247, which can effectively shorten the total optical length of the optical system, facilitate miniaturization of the optical system, and simultaneously avoid excessive increase of high-order spherical aberration, thereby improving the imaging quality of the optical system. When the relationship between the combined focal length of the first lens 110, the second lens 120, and the third lens 130 and the total effective focal length of the optical lens assembly 100 exceeds the above range, the total optical length of the optical system will be longer, which is not conducive to miniaturization of the optical system, and the high-order spherical aberration will be excessively increased, resulting in reduced imaging quality of the optical system.

[0332] When the total effective focal length of the optical lens assembly 100 and the entrance pupil diameter of the optical lens assembly 100 satisfy: f / EPD=1.82, the optical lens assembly 100 has the characteristic of a large aperture, thereby increasing the luminous flux per unit time of the optical system and enhancing the imaging effect of the optical system in a dark environment. When the total effective focal length of the optical lens assembly 100 and the entrance pupil diameter of the optical lens assembly 100 exceed the above range, the aperture of the optical lens assembly 100 is small, reducing the luminous flux per unit time of the optical system, and thus reducing the imaging effect of the optical system in a dark environment.

[0333] The optical lens assembly 100 satisfies the following relationship:

[0334] tan(HFOV) / SD11=0.675.

[0335] Wherein, HFOV is half of the maximum field of view of the optical lens assembly 100, and the maximum field of view is the field of view in the diagonal direction of the optical lens assembly 100, and SD11 is the effective semi-aperture of the object side of the first lens 110. When half of the maximum field of view of the optical lens assembly 100 and the effective semi-aperture of the object side of the first lens 110 satisfy the above relationship, the field of view displayed by the optical lens assembly 100 can be matched with the total length while satisfying the high quality of imaging of the optical lens assembly 100, thereby maintaining the miniaturization of the optical system.

[0336] The optical lens assembly 100 satisfies the following relationship:

[0337] f1 / f6=-1.38.

[0338] Wherein, f1 is the effective focal length of the first lens 110, and f6 is the effective focal length of the sixth lens 160. By controlling the ratio of the effective focal lengths of the first lens 110 and the sixth lens 160 to satisfy the above relationship, the optical power of the optical system can be reasonably allocated, the positive and negative spherical aberrations of the front lens group and the rear lens group can be offset, and the imaging quality of the optical system can be improved.

[0339] The optical lens assembly 100 satisfies the following relationship:

[0340] |f6| / R62=0.958.

[0341] Wherein, f6 is the effective focal length of the sixth lens 160, and R62 is the curvature radius of the image side surface of the sixth lens 160. By adjusting the curvature radius of the image side surface of the sixth lens 160 and the effective focal length of the sixth lens 160 to satisfy the above relationship, the deflection angle of the edge field light entering the photosensitive element can be effectively reduced, the matching degree between the optical lens assembly 100 and the photosensitive element can be increased, and the off-axis field astigmatism can be improved, thereby improving the imaging quality of the optical system.

[0342] The optical lens assembly 100 satisfies the following relationship:

[0343] CT4=0.377.

[0344] Wherein, CT4 is the thickness of the fourth lens 140 on the optical axis. Reasonable control of the center thickness of the fourth lens 140 so that the center thickness of the fourth lens 140 meets the above range can ensure good processability of the lens, reduce the sensitivity of the optical system, and control the field area of ​​the optical system within a reasonable range, which is conducive to the miniaturization of the optical system.

[0345] The optical lens assembly 100 satisfies the following relationship:

[0346] CT1 / (T12+T23)=2.624.

[0347] Wherein, CT1 is the thickness of the first lens 110 on the optical axis, T12 is the spacing distance between the first lens 110 and the second lens 120 on the optical axis, and T23 is the spacing distance between the second lens 120 and the third lens 130 on the optical axis. When the first lens 110, the second lens 120, and the third lens 130 are properly controlled to satisfy the above relationship, there can be enough space for the three lenses during assembly, and collision between the first lens 110 and the second lens 120, or between the second lens 120 and the third lens 130 can be avoided. In addition, shortening of CT1, T12, and T23 is beneficial to the thinning of the optical lens assembly 100, and can also avoid that their values ​​are too small to be unfavorable for assembly, increase the sensitivity of the optical system, and thus improve the imaging quality of the optical lens assembly 100.

[0348] The optical lens assembly 100 satisfies the following relationship:

[0349] (CT1+CT2+CT3) / TTL=0.248.

[0350] Wherein, CT1 is the thickness of the first lens 110 on the optical axis, CT2 is the thickness of the second lens 120 on the optical axis, CT3 is the center thickness of the third lens 130 on the optical axis, and TTL is the distance from the object side surface of the first lens 110 to the image plane on the optical axis. By controlling the thickness configuration of the first lens 110, the second lens 120, and the third lens 130, it is beneficial to reduce the sensitivity of the optical system while maintaining the miniaturization of the optical system.

[0351] The optical lens assembly 100 satisfies the following relationship:

[0352] |vd4-vd3|=32.67.

[0353] Wherein, vd3 is the Abbe number of the third lens 130, and vd4 is the Abbe number of the fourth lens 140. By properly selecting lens materials so that the Abbe numbers of the third lens 130 and the fourth lens 140 satisfy the above relationship, the chromatic aberration of the optical lens assembly 100 can be effectively corrected, the imaging clarity of the optical lens assembly 100 can be improved, and thus the imaging quality of the optical lens assembly 100 can be improved.

[0354] The optical lens assembly 100 satisfies the following relationship:

[0355] CT5 / |SAG51|=1.87.

[0356] Among them, CT5 is the thickness of the fifth lens 150 on the optical axis, and SAG51 is the horizontal displacement of the intersection of the object side of the fifth lens 150 on the optical axis to the maximum effective radius position of the object side of the fifth lens 150 on the optical axis, wherein the horizontal displacement is defined as positive toward the image side and negative toward the object side. By controlling the fifth lens 150 to satisfy the above relationship, the shape of the fifth lens 150 can be appropriately made to facilitate the manufacture and molding of the fifth lens 150, and reduce the defects of poor molding of the fifth lens 150. At the same time, the field area generated by the front lens group can be trimmed to ensure the balance of the field area of ​​the optical system and improve the imaging quality of the optical system.

[0357] The surface of the lens of the optical lens assembly 100 may be an aspherical surface. For the surface of these aspherical surfaces, the aspherical surface equation is:

[0358]

[0359] Where Z is the height of the lens surface parallel to the Z axis, r is the radial distance from the vertex, c is the curvature of the surface at the vertex, K is the cone constant, A4, A6, A8, A10 , A 12 They represent the aspheric coefficients of the 4th, 6th, 8th, 10th and 12th order respectively. In the embodiment of the present application, the cone constant K and aspheric coefficients corresponding to the surface of each aspheric surface are shown in Table 12:

[0360] Table 12

[0361]

[0362] Fig.12 1 and 2 are the spherochromatic aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the optical lens assembly 100 in the first embodiment.

[0363] Depend on Fig.12 It can be seen that the focal shifts of the spherical aberration corresponding to the wavelengths of 470.0000nm, 510.0000nm, 555.0000nm, 610.0000nm and 650.0000nm are all within 0.050 mm, indicating that the imaging quality of the embodiment of the present application is good, the astigmatism is well compensated, and the distortion is also well corrected.

[0364] Embodiment 7

[0365] The structural schematic diagram of the imaging optical lens assembly 100 of the embodiment of the present application is as follows Fig.13 The optical lens assembly 100 includes a first lens 110, a second lens 120, a third lens 130, a fourth lens 140, a fifth lens 150, and a sixth lens 160, which are arranged in sequence from the object plane to the image plane along the optical axis. The relevant parameters of the optical lens assembly 100 are shown in Table 13, where f is the focal length of the optical lens assembly 100, FNO represents the aperture value, HFOV represents half of the maximum field of view of the optical lens assembly 100, and the maximum field of view is the field of view in the diagonal direction of the optical lens assembly 100, TTL represents the distance from the object side surface of the first lens 110 to the image plane on the optical axis, and the units of the focal length, the radius of curvature, and the thickness are all in millimeters.

[0366] Table 13

[0367]

[0368] From Table 13 and Fig.13It can be known that in the embodiment of the present application, the first lens 110 has positive optical power, and the radius of curvature of the object plane side of the first lens 110 at the optical axis is positive, so the object plane side of the first lens 110 at the optical axis is convex toward the object plane, and the radius of curvature of the image plane side of the first lens 110 at the optical axis is positive, so the image plane side of the first lens 110 at the optical axis is concave toward the image plane. The object plane side of the first lens 110 at the circumference is convex toward the object plane, and the image plane side of the first lens 110 at the circumference is concave toward the image plane. The second lens 120 has negative optical power, and the radius of curvature of the object plane side of the second lens 120 at the optical axis is positive, so the object plane side of the second lens 120 at the optical axis is convex toward the object plane, and the radius of curvature of the image plane side of the second lens 120 at the optical axis is positive, so the image plane side of the second lens 120 at the optical axis is concave toward the image plane. The object surface side of the second lens 120 is convexly arranged toward the object surface at the circumference, and the image surface side of the second lens 120 is concavely arranged toward the image surface at the circumference. The third lens 130 has negative optical power, and the curvature radius of the object surface side of the third lens 130 at the optical axis is positive, so the object surface side of the third lens 130 is convexly arranged toward the object surface at the optical axis, and the curvature radius of the image surface side of the third lens 130 at the optical axis is positive, so the image surface side of the third lens 130 is concavely arranged toward the image surface at the optical axis. The object surface side of the third lens 130 is concavely arranged toward the object surface at the circumference, and the image surface side of the third lens 130 is convexly arranged toward the image surface at the circumference. The fourth lens 140 has positive refractive power, and the radius of curvature of the object surface of the fourth lens 140 at the optical axis is negative, so the object surface of the fourth lens 140 at the optical axis is concave toward the object surface, and the radius of curvature of the image surface of the fourth lens 140 at the optical axis is negative, so the image surface of the fourth lens 140 at the optical axis is convex toward the image surface. The object surface of the fourth lens 140 at the circumference is concave toward the object surface, and the image surface of the fourth lens 140 at the circumference is convex toward the image surface. The fifth lens 150 has positive refractive power, and the radius of curvature of the object surface of the fifth lens 150 at the optical axis is positive, so the object surface of the fifth lens 150 at the optical axis is convex toward the object surface, and the radius of curvature of the image surface of the fifth lens 150 at the optical axis is negative, so the image surface of the fifth lens 150 at the optical axis is convex toward the image surface. The object surface side of the fifth lens 150 is concavely arranged toward the object surface at the circumference, and the image surface side of the fifth lens 150 is convexly arranged toward the image surface at the circumference. The sixth lens 160 has negative optical power, and the curvature radius of the object surface side of the sixth lens 160 at the optical axis is positive, so the object surface side of the sixth lens 160 is convexly arranged toward the object surface at the optical axis, and the curvature radius of the image surface side of the sixth lens 160 at the optical axis is positive, so the image surface side of the sixth lens 160 is concavely arranged toward the image surface at the optical axis. The object surface side of the sixth lens 160 is convexly arranged toward the object surface at the circumference, and the image surface side of the sixth lens 160 is convexly arranged toward the image surface at the circumference.

[0369] Furthermore, the optical lens assembly 100 satisfies the following relationship:

[0370] f123 / f=1.535; f / EPD=1.87.

[0371] Wherein, f123 is the combined focal length of the first lens 110 , the second lens 120 and the third lens 130 , the total effective focal length of the optical lens assembly 100 is f, and the entrance pupil diameter of the optical lens assembly 100 is EPD.

[0372] By reasonably balancing the lens configuration, the relationship between the combined focal length of the first lens 110, the second lens 120, and the third lens 130 and the total effective focal length of the optical lens assembly 100 satisfies: f123 / f=6.62 / 4.31=1.535, which can effectively shorten the total optical length of the optical system, facilitate miniaturization of the optical system, and simultaneously avoid excessive increase of high-order spherical aberration, thereby improving the imaging quality of the optical system. When the relationship between the combined focal length of the first lens 110, the second lens 120, and the third lens 130 and the total effective focal length of the optical lens assembly 100 exceeds the above range, the total optical length of the optical system will be longer, which is not conducive to miniaturization of the optical system, and the high-order spherical aberration will be excessively increased, resulting in reduced imaging quality of the optical system.

[0373] When the total effective focal length of the optical lens assembly 100 and the entrance pupil diameter of the optical lens assembly 100 satisfy: f / EPD=4.31 / 2.299=1.87, the optical lens assembly 100 has the characteristic of a large aperture, thereby increasing the luminous flux per unit time of the optical system and enhancing the imaging effect of the optical system in a dark environment. When the total effective focal length of the optical lens assembly 100 and the entrance pupil diameter of the optical lens assembly 100 exceed the above range, the aperture of the optical lens assembly 100 is small, which reduces the luminous flux per unit time of the optical system, and also reduces the imaging effect of the optical system in a dark environment.

[0374] The optical lens assembly 100 satisfies the following relationship:

[0375] tan(HFOV) / SD11=0.726.

[0376] Wherein, HFOV is half of the maximum field of view of the optical lens assembly 100, and the maximum field of view is the field of view in the diagonal direction of the optical lens assembly 100, and SD11 is the effective semi-aperture of the object side of the first lens 110. When half of the maximum field of view of the optical lens assembly 100 and the effective semi-aperture of the object side of the first lens 110 satisfy the above relationship, the field of view displayed by the optical lens assembly 100 can be matched with the total length while satisfying the high quality of imaging of the optical lens assembly 100, thereby maintaining the miniaturization of the optical system.

[0377] The optical lens assembly 100 satisfies the following relationship:

[0378] f1 / f6=-0.52.

[0379] Wherein, f1 is the effective focal length of the first lens 110, and f6 is the effective focal length of the sixth lens 160. By controlling the ratio of the effective focal lengths of the first lens 110 and the sixth lens 160 to satisfy the above relationship, the optical power of the optical system can be reasonably allocated, the positive and negative spherical aberrations of the front lens group and the rear lens group can be offset, and the imaging quality of the optical system can be improved.

[0380] The optical lens assembly 100 satisfies the following relationship:

[0381] |f6| / R62=7.628.

[0382] Wherein, f6 is the effective focal length of the sixth lens 160, and R62 is the curvature radius of the image side surface of the sixth lens 160. By adjusting the curvature radius of the image side surface of the sixth lens 160 and the effective focal length of the sixth lens 160 to satisfy the above relationship, the deflection angle of the edge field light entering the photosensitive element can be effectively reduced, the matching degree between the optical lens assembly 100 and the photosensitive element can be increased, and the off-axis field astigmatism can be improved, thereby improving the imaging quality of the optical system.

[0383] The optical lens assembly 100 satisfies the following relationship:

[0384] CT4=0.657.

[0385] Wherein, CT4 is the thickness of the fourth lens 140 on the optical axis. Reasonable control of the center thickness of the fourth lens 140 so that the center thickness of the fourth lens 140 meets the above range can ensure good processability of the lens, reduce the sensitivity of the optical system, and control the field area of ​​the optical system within a reasonable range, which is conducive to the miniaturization of the optical system.

[0386] The optical lens assembly 100 satisfies the following relationship:

[0387] CT1 / (T12+T23)=2.602.

[0388] Wherein, CT1 is the thickness of the first lens 110 on the optical axis, T12 is the spacing distance between the first lens 110 and the second lens 120 on the optical axis, and T23 is the spacing distance between the second lens 120 and the third lens 130 on the optical axis. When the first lens 110, the second lens 120, and the third lens 130 are properly controlled to satisfy the above relationship, there can be enough space for the three lenses during assembly, and collision between the first lens 110 and the second lens 120, or between the second lens 120 and the third lens 130 can be avoided. In addition, shortening of CT1, T12, and T23 is beneficial to the thinning of the optical lens assembly 100, and can also avoid that their values ​​are too small to be unfavorable for assembly, increase the sensitivity of the optical system, and thus improve the imaging quality of the optical lens assembly 100.

[0389] The optical lens assembly 100 satisfies the following relationship:

[0390] (CT1+CT2+CT3) / TTL=0.252.

[0391] Wherein, CT1 is the thickness of the first lens 110 on the optical axis, CT2 is the thickness of the second lens 120 on the optical axis, CT3 is the center thickness of the third lens 130 on the optical axis, and TTL is the distance from the object side surface of the first lens 110 to the image plane on the optical axis. By controlling the thickness configuration of the first lens 110, the second lens 120, and the third lens 130, it is beneficial to reduce the sensitivity of the optical system while maintaining the miniaturization of the optical system.

[0392] The optical lens assembly 100 satisfies the following relationship:

[0393] |vd4-vd3|=35.56.

[0394] Wherein, vd3 is the Abbe number of the third lens 130, and vd4 is the Abbe number of the fourth lens 140. By properly selecting lens materials so that the Abbe numbers of the third lens 130 and the fourth lens 140 satisfy the above relationship, the chromatic aberration of the optical lens assembly 100 can be effectively corrected, the imaging clarity of the optical lens assembly 100 can be improved, and thus the imaging quality of the optical lens assembly 100 can be improved.

[0395] The optical lens assembly 100 satisfies the following relationship:

[0396] CT5 / |SAG51|=1.48.

[0397] Among them, CT5 is the thickness of the fifth lens 150 on the optical axis, and SAG51 is the horizontal displacement of the intersection of the object side of the fifth lens 150 on the optical axis to the maximum effective radius position of the object side of the fifth lens 150 on the optical axis, wherein the horizontal displacement is defined as positive toward the image side and negative toward the object side. By controlling the fifth lens 150 to satisfy the above relationship, the shape of the fifth lens 150 can be appropriately made to facilitate the manufacture and molding of the fifth lens 150, and reduce the defects of poor molding of the fifth lens 150. At the same time, the field area generated by the front lens group can be trimmed to ensure the balance of the field area of ​​the optical system and improve the imaging quality of the optical system.

[0398] The surface of the lens of the optical lens assembly 100 may be an aspherical surface. For the surface of these aspherical surfaces, the aspherical surface equation is:

[0399]

[0400] Where Z is the height of the lens surface parallel to the Z axis, r is the radial distance from the vertex, c is the curvature of the surface at the vertex, K is the cone constant, A4, A6, A8, A 10 , A 12 They represent the aspheric coefficients of the 4th, 6th, 8th, 10th and 12th order respectively. In the embodiment of the present application, the cone constant K and aspheric coefficients corresponding to the surface of each aspheric surface are shown in Table 14:

[0401] Table 14

[0402]

[0403]

[0404] Fig.14 1 and 2 are the spherochromatic aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the optical lens assembly 100 in the first embodiment.

[0405] Depend on Fig.14 It can be seen that the focal shifts of the spherical aberration corresponding to the wavelengths of 470.0000nm, 510.0000nm, 555.0000nm, 610.0000nm and 650.0000nm are all within 0.050 mm, indicating that the imaging quality of the embodiment of the present application is good, the astigmatism is well compensated, and the distortion is also well corrected.

[0406] like Fig.15In the embodiment shown, the camera module 200 includes an optical lens group and a photosensitive element 210. The photosensitive element 210 is a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). Since the optical lens group has a shorter total optical length when matching a chip of the same size, the total size of the camera module 200 can be effectively shortened to achieve a more compact design. In addition, the optical lens group also has a better effect of balancing field curvature and has a higher resolution capability, so it has good imaging quality. The camera module 200 with excellent molding quality and miniaturization can better adapt to a variety of miniaturized electronic devices to be applied in more scenes. In some embodiments, the first lens 110 and the second lens 120 of the optical lens group have relatively consistent and small apertures, which can make the camera module 200 encapsulated with the optical lens group have a small front end structure, and the camera module 200 with a small front end structure can also adapt well to a variety of miniaturized electronic devices. Specifically, in some applications, the camera module 200 with a small front end structure can reduce the area of ​​the camera light hole on the electronic device to increase the screen ratio.

[0407] like Fig.16 In the embodiment shown, the camera module 200 is applied to the terminal 300. Specifically, in some embodiments, the terminal 300 may be a device equipped with a camera lens, such as a smart phone, a personal digital assistant (PDA), a game console, etc. The camera module 200 may be installed on the housing or in the screen of the terminal 300, and the embodiment of the present application does not limit the specific installation position of the camera module 200. In addition, the size of the internal hardware greatly affects the miniaturization degree of the terminal 300, and by applying a thinner camera module 200, the terminal 300 can save space in the direction of the optical axis of the camera module 200, that is, it can save space in the thickness direction of the terminal 300, which not only enables the terminal 300 to be designed in a thinner direction, but also can flexibly adjust the positional relationship of the internal hardware of the terminal 300, thereby increasing the internal design space.

[0408] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0409] The above is a description of an optical lens assembly, a camera module and a terminal provided in the present application. For technicians in this field, according to the ideas of the embodiments of the present application, there may be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. An optical lens assembly, characterized in that: It includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens which are sequentially arranged along the optical axis from the object plane to the image plane; The first lens has positive optical power; The second lens has an optical power; The third lens has optical power, and the radius of curvature of the object side surface of the third lens at the optical axis is positive, and the radius of curvature of the image side surface of the third lens at the optical axis is positive; The fourth lens has positive refractive power; The fifth lens has optical power, the object side surface and the image side surface of the fifth lens are both aspherical surfaces, and at least one of the object side surface and the image side surface of the fifth lens has at least one inflection point; The sixth lens has negative optical power; Wherein, the optical lens assembly has six lenses with optical power; The optical lens assembly satisfies the following relationship: 1.0 <f123 / f<1.7; 1.59≤f / EPD≤2.0; 0.5 mm -1 <tan(HFOV) / SD11<1 mm -1 ; Among them, f123 is the combined focal length of the first lens, the second lens and the third lens, the total effective focal length of the optical lens group is f, the entrance pupil diameter of the optical lens group is EPD, HFOV is half of the maximum field of view angle of the optical lens group, and SD11 is the effective semi-aperture of the object side of the first lens.

2. The optical lens assembly according to claim 1, characterized in that The curvature radius of the object side surface of the first lens at the optical axis is positive, and the curvature radius of the image side surface of the first lens at the optical axis is positive; The curvature radius of the object side surface of the second lens at the optical axis is positive; The object side surface of the fifth lens has a positive curvature radius at the optical axis.

3. The optical lens assembly according to claim 1, characterized in that The optical lens assembly satisfies the following relationship: -1.5 <f1 / f6<0; Wherein, f1 is the effective focal length of the first lens, and f6 is the effective focal length of the sixth lens.

4. The optical lens assembly according to claim 1, characterized in that: The optical lens assembly satisfies the following relationship: 0.5<|f6| / R62<8; Wherein, f6 is the effective focal length of the sixth lens, and R62 is the curvature radius of the image side surface of the sixth lens.

5. The optical lens assembly according to claim 1, characterized in that: The optical lens assembly satisfies the following relationship: 0.45mm <CT4<0.9mm; Wherein, CT4 is the thickness of the fourth lens on the optical axis.

6. The optical lens assembly according to claim 1, characterized in that: The optical lens assembly satisfies the following relationship: 2.0 <CT1 / (T12+T23)<3.0; Wherein, CT1 is the thickness of the first lens on the optical axis, T12 is the distance between the first lens and the second lens on the optical axis, and T23 is the distance between the second lens and the third lens on the optical axis.

7. The optical lens assembly according to claim 1, characterized in that: The optical lens assembly satisfies the following relationship: 0.1<(CT1+CT2+CT3) / TTL<0.3; 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, CT3 is the thickness of the third lens on the optical axis, and TTL is the distance from the object side of the first lens to the image plane on the optical axis.

8. The optical lens assembly according to claim 1, characterized in that: The optical lens assembly satisfies the following relationship: 3.0<|vd4-vd3|<42.0; Wherein, vd3 is the Abbe number of the third lens, and vd4 is the Abbe number of the fourth lens.

9. The optical lens assembly according to claim 1, characterized in that: The optical lens assembly satisfies the following relationship: 0.5 <CT5 / |SAG51|<2.0; Among them, CT5 is the thickness of the fifth lens on the optical axis, and SAG51 is the horizontal displacement of the intersection of the object side of the fifth lens on the optical axis to the maximum effective radius position of the object side of the fifth lens on the optical axis.

10. A camera module, characterized in that: The camera module includes a photosensitive element and the optical lens assembly according to any one of claims 1 to 9.

11. A terminal, characterized in that: The terminal includes the camera module as claimed in claim 10.

Images