Optical lens assembly, image capturing device and electronic device

Abstract

The application discloses an optical lens, an image pickup device and an electronic device. The optical lens comprises, in sequence from an object side to an image side along an optical axis, a first lens with positive refractive power, a curvature radius of the object side surface of the first lens at the optical axis being positive, a second lens with refractive power, a third lens with refractive power, a fourth lens with negative refractive power, a fifth lens with positive refractive power, a curvature radius of the object side surface of the fifth lens at the optical axis being positive, a curvature radius of the image side surface of the fifth lens at the optical axis being negative, and a sixth lens with negative refractive power. A distance from the object side surface of the first lens to an imaging surface of the optical lens on the optical axis is TTL, a half of an image height corresponding to a maximum field of view angle of the optical lens is ImgH, an effective focal length of the fifth lens is f5, an effective focal length of the optical lens is f, and the following conditions are met: TTL / ImgH < 1.35; ImgH > 4 mm; and f5 / f < 3. The optical lens is light and thin and has high pixels, and can meet high requirements of users.

Description

Technical Field

[0001] This application relates to the field of photography, and more particularly to an optical lens assembly, an image capturing device, and an electronic device. Background Technology

[0002] In recent years, with the rise of portable electronic products with camera functions, thinness and lightness have gradually become a trend, and the camera lenses mounted on them have also begun to develop towards thinness and lightness. Generally, the photosensitive elements of optical systems are nothing more than two types: charge-coupled devices (CCD) or complementary metal-oxide-semiconductor sensors (CMOS sensors).

[0003] Due to limitations in semiconductor manufacturing technology, it has become difficult to further shrink pixel size. In related technologies, increasing chip size is generally used to increase pixel count. However, increasing chip size cannot meet the requirements of the overall thinness and lightness of the optical system. Therefore, how to achieve high pixel count and thinness in the optical system has become an urgent problem to be solved. Summary of the Invention

[0004] This application provides an optical lens assembly, an image capturing device, and an electronic device, which enable the optical lens assembly to have the characteristics of thinness and high pixel count.

[0005] In a first aspect, embodiments of this application provide an optical lens assembly, comprising, in sequence along the optical axis from the object side to the image side: a first lens having positive refractive power, wherein the radius of curvature of the object side of the first lens near the optical axis is positive; a second lens having refractive power; a third lens having refractive power; a fourth lens having negative refractive power; a fifth lens having positive refractive power, wherein the radius of curvature of its object side near the optical axis is positive and the radius of curvature of its image side near the optical axis is negative; and a sixth lens having negative refractive power; wherein the distance from the object side of the first lens to the imaging plane of the optical lens assembly on the optical axis is TTL, half of the image height corresponding to the maximum field of view of the optical lens assembly is ImgH, the effective focal length of the fifth lens is f5, and the effective focal length of the optical lens assembly is f, satisfying the following conditions: TTL / ImgH < 1.35; ImgH > 4mm; f5 / f < 3.

[0006] An optical lens assembly based on an embodiment of this application, by reasonably controlling the total optical length and image height of the optical lens assembly, is conducive to enabling the optical lens assembly to have the characteristics of thinness and high pixel count. At the same time, by reasonably controlling the positive and negative distribution of optical power and focal length of each lens, the total length of the optical lens assembly is further shortened while ensuring image quality, which is conducive to achieving thinness.

[0007] In some embodiments, the radius of curvature of the image-side surface of the fifth lens near the optical axis is R. 10 The fifth lens has a center thickness of CT5 on the optical axis and satisfies the following condition: 20 <R 10 / CT5<160.

[0008] Based on the above embodiments, by reasonably controlling the surface shape and center thickness of the fifth lens, the thickness of the lens can be effectively controlled, thereby facilitating the thinning of the optical lens assembly.

[0009] In some embodiments, half of the maximum field of view of the optical lens group is HFOV, and satisfies the following condition: HFOV ≥ 40deg.

[0010] Based on the above embodiments, by reasonably controlling the field of view, the shooting range of the optical lens group can be effectively increased, ensuring the wide-angle characteristics of the optical lens group, thereby more comprehensively restoring the scene seen by the user and improving the user experience.

[0011] In some embodiments, the aperture number of the optical lens group is FNO, and satisfies the following condition: FNO / ImgH<0.5.

[0012] Based on the above embodiments, by reasonably controlling the aperture number and image height, the optical lens group has the characteristics of a large image plane and a large aperture.

[0013] In some embodiments, the effective focal length of the first lens is f1, and satisfies the following condition: 0.9 <f1 / f<1.3。

[0014] Based on the above embodiments, by reasonably controlling the effective focal length of the first lens and the effective focal length of the optical lens group, light deviation can be effectively controlled, sensitivity reduced, field curvature corrected, and spherical aberration and astigmatism of the optical lens group reduced, thereby effectively improving the imaging quality of the optical lens group. In addition, the overall length of the optical lens group can be controlled, facilitating the thinning and lightening of the optical lens group.

[0015] In some embodiments, the optical lens group satisfies the following condition: f5 / f>1.2.

[0016] Based on the above embodiments, by further rationally controlling the effective focal length of the fifth lens and the effective focal length of the optical lens group, the imaging quality of the optical lens group is improved and the total length of the optical lens group is shortened.

[0017] In some embodiments, the back focal length of the optical lens group is BF, and satisfies the following condition: BF≥0.7mm.

[0018] Based on the above embodiments, by reasonably controlling the back focal length, space is left for the structural design of the lens barrel of the image capturing device, thereby enabling the image capturing device to have a sufficient focusing range and ensuring that the optical lens group matches the photosensitive element.

[0019] In some embodiments, the radius of curvature of the object side of the fourth lens near the optical axis is R7, and the radius of curvature of the image side of the fourth lens near the optical axis is R8, satisfying the following condition: -2<(R7+R8) / (R7-R8)<2.

[0020] Based on the above embodiments, by reasonably controlling the surface shape of the fourth lens, the structure of the fourth lens will not be excessively bent, which is conducive to the processing and shaping of the fourth lens and reduces sensitivity.

[0021] In some embodiments, the refractive index of the second lens is n2, the refractive index of the fourth lens is n4, and the following conditions are satisfied: n2>1.65; n4>1.58.

[0022] Based on the above embodiments, by reasonably controlling the refractive index of the second lens, it is helpful to enhance the degree of refraction when light is emitted, so as to achieve the preset refractive effect in a smaller space, which is beneficial to shorten the total length of the optical lens group and improve the resolution of the optical lens group. At the same time, by reasonably controlling the refractive index of the fourth lens, the total length of the optical lens group is further shortened, and the resolution of the optical lens group is improved.

[0023] Secondly, embodiments of this application provide an image capturing device, including: an optical lens group as described in any of the above embodiments; and a photosensitive element located at the imaging surface of the optical lens group.

[0024] Based on the imaging device in the embodiments of this application, by adopting the above-mentioned optical lens group, the imaging device is smaller in size and has higher pixel count, which can meet the high requirements of users.

[0025] Thirdly, embodiments of this application provide an electronic device, including: the image capturing device described above.

[0026] Based on the electronic device in the embodiments of this application, by adopting the above-mentioned optical lens group, the electronic device is smaller and more aesthetically pleasing, while the imaging quality of the electronic device is better and the user experience is better.

[0027] An optical lens assembly, image acquisition device, and electronic device based on embodiments of this application, by reasonably controlling the total optical length and image height of the optical lens assembly, facilitates the optical lens assembly to have the characteristics of thinness and high pixel count. At the same time, by reasonably controlling the positive and negative distribution of optical power and focal length of each lens, the total length of the optical lens assembly is further shortened while ensuring image quality. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the optical lens assembly according to the first embodiment of this application;

[0030] Figures 2A to 2C The schematic diagrams of the spherical aberration curve, field curvature curve, and distortion curve of the optical lens group according to the first embodiment of this application are shown respectively.

[0031] Figure 3 This is a schematic diagram of the optical lens assembly according to the second embodiment of this application;

[0032] Figures 4A to 4C The schematic diagrams of the spherical aberration curve, field curvature curve, and distortion curve of the optical lens group according to the second embodiment of this application are shown respectively.

[0033] Figure 5 This is a schematic diagram of the optical lens assembly according to the third embodiment of this application;

[0034] Figures 6A to 6C The schematic diagrams of the spherical aberration curve, field curvature curve, and distortion curve of the optical lens group according to the third embodiment of this application are shown respectively.

[0035] Figure 7 This is a schematic diagram of the optical lens assembly according to the fourth embodiment of this application;

[0036] Figures 8A to 8C The diagrams illustrate the spherical aberration curve, field curvature curve, and distortion curve of the optical lens group according to the fourth embodiment of this application.

[0037] Figure 9 This is a schematic diagram of the optical lens assembly according to the fifth embodiment of this application;

[0038] Figures 10A to 10C The schematic diagrams of the spherical aberration curve, field curvature curve, and distortion curve of the optical lens group according to the fifth embodiment of this application are shown respectively.

[0039] Figure 11 This is a schematic diagram of the optical lens assembly according to the sixth embodiment of this application;

[0040] Figures 12A to 12CThe diagrams illustrate the spherical aberration curve, field curvature curve, and distortion curve of the optical lens group according to the sixth embodiment of this application.

[0041] Figure 13 This is a schematic diagram of the optical lens assembly according to the seventh embodiment of this application;

[0042] Figures 14A to 14C The diagrams illustrate the spherical aberration curve, field curvature curve, and distortion curve of the optical lens group according to the seventh embodiment of this application.

[0043] Figure 15 This is a schematic diagram of the optical lens assembly according to the eighth embodiment of this application;

[0044] Figures 16A to 16C The diagrams illustrate the spherical aberration curve, field curvature curve, and distortion curve of the optical lens group according to the eighth embodiment of this application.

[0045] It should be noted that the thickness, size, and shape of the lenses have been slightly exaggerated in the accompanying drawings for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are illustrated by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not drawn strictly to scale.

[0046] Explanation of reference numerals in the attached diagram:

[0047] L1, First lens; L2, Second lens; L3, Third lens; L4, Fourth lens; L5, Fifth lens; L6, Sixth lens; L7, Filter; S1, Object-side surface of the first lens; S2, Image-side surface of the first lens; S3, Object-side surface of the second lens; S4, Image-side surface of the second lens; S5, Object-side surface of the third lens; S6, Image-side surface of the third lens; S7, Object-side surface of the fourth lens; S8, Image-side surface of the fourth lens; S9, Object-side surface of the fifth lens; S10, Image-side surface of the fifth lens; S11, Object-side surface of the sixth lens; S12, Image-side surface of the sixth lens; S13, First surface; S14, Second surface; S15, Imaging surface. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0049] In implementing this application, limitations in semiconductor manufacturing technology have made it difficult to further shrink pixel size. The common approach is to increase chip size to improve pixel count, while simultaneously maintaining a thinner and lighter system, drastically increasing the difficulty of optical design. In related technologies, the imaging device used in smartphones employs a five-element optical lens group, which is neither thin nor light enough, and its pixel count is insufficient to meet users' high demands.

[0050] To address the aforementioned problems, embodiments of this application provide an optical lens assembly comprising a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, each lens possessing refractive power. The first to sixth lenses are arranged sequentially along the optical axis from the object side to the image side. Each lens has an object-side surface and an image-side surface; the object-side surface is the surface closest to the object, and the image-side surface is the surface closest to the image.

[0051] The first lens has positive refractive power. The radius of curvature of the object-side surface of the first lens near the optical axis is positive, meaning it has a convex surface. The radius of curvature of the image-side surface of the first lens near the optical axis is negative, meaning it has a concave surface. Furthermore, the radius of curvature at the circumference of the maximum effective aperture of the object-side surface of the first lens is positive, meaning it has a convex surface. The radius of curvature at the circumference of the maximum effective aperture of the image-side surface of the first lens can be positive (concave) or negative (convex). It should be noted that both the object-side surface and the image-side surface in this application can be understood as the optically effective area of ​​the lens. In this application, "at the optical axis" refers to the area near the optical axis; when describing the surface shape of the lens surface at the optical axis, it can indicate the surface shape of the lens surface at least at the optical axis. The circumference of the maximum effective aperture of the object side and image side of a lens can be understood as the outer circumference region of the object side and image side. If the lens is convex at the circumference of its maximum effective aperture but the position is not clearly defined, it can be understood that at least the area near the magnified outer circumference of the object side or image side of the lens can be convex.

[0052] The second lens can have either positive or negative refractive power. The object-side surface of the second lens has a positive radius of curvature near the optical axis, meaning it is convex; the image-side surface has a negative radius of curvature near the optical axis, meaning it is concave. Furthermore, the radius of curvature at the circumference of the maximum effective aperture on the object-side surface of the second lens can be either positive (convex) or negative (concave); the radius of curvature at the circumference of the maximum effective aperture on the image-side surface of the second lens is negative, meaning it is convex.

[0053] The third lens can have either positive or negative refractive power. The radius of curvature of the object-side surface of the third lens near the optical axis can be positive (i.e., convex) or negative (i.e., concave). The radius of curvature of the image-side surface of the third lens near the optical axis can also be positive (i.e., convex) or negative (i.e., concave). The radius of curvature of the circumference of the maximum effective aperture of the object-side surface of the third lens can be negative (i.e., convex) or positive (i.e., concave). The radius of curvature of the circumference of the maximum effective aperture of the image-side surface of the third lens can also be positive (i.e., concave) or negative (i.e., convex).

[0054] The fourth lens has negative refractive power. The radius of curvature of the object-side surface of the fourth lens near the optical axis can be negative (concave) or positive (convex). The radius of curvature of the image-side surface of the fourth lens near the optical axis can be positive (convex) or negative (concave). The radius of curvature of the circumference of the maximum effective aperture of the object-side surface of the fourth lens is negative (convex), while the radius of curvature of the circumference of the maximum effective aperture of the image-side surface of the fourth lens is positive (concave).

[0055] The fifth lens has positive refractive power. The object-side surface of the fifth lens has a positive radius of curvature near the optical axis, meaning it is convex. The image-side surface of the fifth lens has a negative radius of curvature near the optical axis, meaning it is concave. The radius of curvature of the circumference of the maximum effective aperture of the object-side surface of the fifth lens is negative, meaning it is convex. The fourth lens, on the other hand, has a positive radius of curvature of the circumference of the maximum effective aperture of its image-side surface, meaning it is concave.

[0056] The sixth lens has negative refractive power. The object-side surface of the sixth lens has a positive radius of curvature near the optical axis, meaning it is convex; the image-side surface has a negative radius of curvature near the optical axis, meaning it is concave. The radius of curvature of the circumference of the maximum effective aperture of the object-side surface of the sixth lens can be either negative (convex) or positive (concave); the radius of curvature of the circumference of the maximum effective aperture of the image-side surface of the sixth lens is positive (concave).

[0057] To improve aberration problems in optical lens groups, each lens in this application is an aspherical lens. Aspherical lenses have a characteristic where the curvature changes continuously from the lens center to the lens periphery. Unlike spherical lenses with constant curvature, aspherical lenses have better radius of curvature characteristics, which can improve spherical aberration and astigmatism. By using aspherical lenses in the optical lens group, aberrations occurring during imaging can be effectively eliminated, thereby improving the image quality of the optical lens group.

[0058] To improve the imaging effect of the optical lens group, a filter can be provided on the image side of the sixth lens. By providing a filter on the image side of the sixth lens, the imaging quality of the optical lens group can be significantly improved. Among them, the filter can be an infrared cut-off filter.

[0059] To make the optical lens group thinner and lighter, the distance from the object side of the first lens to the imaging surface of the optical lens group on the optical axis is TTL, and half of the image height corresponding to the maximum field angle of the optical lens group is ImgH, and the following conditional formula is satisfied: TTL / ImgH < 1.35; ImgH > 4mm. By reasonably controlling the optical total length and image height of the optical lens group, it is beneficial for the optical lens group to have the characteristics of being thin and having high pixels.

[0060] In addition, the effective focal length of the fifth lens is f5, and the effective focal length of the optical lens group is f, and the following conditional formula is satisfied: f5 / f < 3. By reasonably controlling the positive and negative distribution of the optical power and focal length of each lens, on the basis of ensuring the imaging quality, the total length of the optical lens group is further shortened. <{

[0061] The radius of curvature of the image side of the fifth lens near the optical axis is R 10 , and the central thickness of the fifth lens on the optical axis is CT5, and the following conditional formula is satisfied: 20 < R 10 / CT5 < 160. By reasonably controlling the surface shape and central thickness of the fifth lens, the thickness of the lens is effectively controlled, which is beneficial for the optical lens group to be thinner and lighter.

[0062] Half of the maximum field angle of the optical lens group is HFOV, and the following conditional formula is satisfied: HFOV ≥ 40deg. By reasonably controlling the field angle, the shooting range of the optical lens group can be effectively increased, and the wide-angle characteristics of the optical lens group can be ensured, so as to more comprehensively restore the scene seen by the user and improve the user experience.

[0063] The aperture number of the optical lens group is FNO, and the following conditional formula is satisfied: FNO / ImgH < 0.5. By reasonably controlling the aperture number and image height, the optical lens group has the characteristics of a large image surface and a large aperture.

[0064] The effective focal length of the first lens is f1, and the following conditional formula is satisfied: 0.9 < f1 / f < 1.3. By reasonably controlling the effective focal length of the first lens and the effective focal length of the optical lens group, the light segregation can be effectively controlled, the sensitivity can be reduced, and at the same time, the field curvature can be corrected, and the spherical aberration, astigmatism, etc. of the optical lens group can be reduced, so as to effectively improve the imaging quality of the optical lens group. In addition, the total length of the optical lens group can be controlled, which is beneficial for the optical lens group to be thinner and lighter.

[0065] The optical lens group satisfies the following condition: f5 / f > 1.2. By further rationally controlling the effective focal length of the fifth lens and the effective focal length of the optical lens group, the imaging quality of the optical lens group is improved, and the overall length of the optical lens group is shortened.

[0066] The back focal length of the optical lens group is BF, satisfying the following condition: BF ≥ 0.7 mm. Here, BF can also be interpreted as the shortest distance along the optical axis from the image-side surface of the sixth lens to the imaging plane of the optical lens group. Optionally, 0.9 ≤ BF ≤ 1.02. By reasonably controlling the back focal length, space is provided for the structural design of the image-capturing device's barrel, thus ensuring that the image-capturing device has a sufficient focusing range and guarantees the matching of the optical lens group with the photosensitive element.

[0067] The object-side surface of the fourth lens has a radius of curvature of R7 near the optical axis, and the image-side surface has a radius of curvature of R8 near the optical axis, satisfying the following condition: -2 < (R7 + R8) / (R7 - R8) < 2. By reasonably controlling the surface shape of the fourth lens, the structure of the fourth lens is prevented from being excessively curved, which facilitates the processing and shaping of the fourth lens and reduces sensitivity.

[0068] The refractive index of the second lens is n2, and the refractive index of the fourth lens is n4, satisfying the following conditions: n2 > 1.65; n4 > 1.58. By reasonably controlling the refractive index of the second lens, the degree of refraction of light rays is enhanced, thus achieving the desired refractive effect within a smaller space. This helps to shorten the overall length of the optical lens group and improve its resolution. Simultaneously, by reasonably controlling the refractive index of the fourth lens, the overall length of the optical lens group is further shortened, further improving its resolution.

[0069] Embodiments of this application also provide an image capturing device, which includes an optical lens group and a photosensitive element as described in any of the above embodiments. The photosensitive element is located at the imaging plane of the optical lens group. The optical lens group is used to receive the light signal of the subject and project it onto the photosensitive element. The photosensitive element is used to convert the light signal corresponding to the subject into an image signal. By employing the aforementioned optical lens group, this image capturing device is smaller and has a higher pixel count, which can meet the high requirements of users.

[0070] The photosensitive element can be a photocoupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The imaging device can be a camera with a solid-state CMOS sensor used in a small imaging device, particularly a camera lens in an imaging device mounted on miniaturized smartphones, mobile phones and PDAs (Personal Digital Assistants), game consoles, PCs and other information terminal devices, as well as home appliances with added camera functions.

[0071] Embodiments of this application also provide an electronic device that includes the above-described image capturing device. By employing the above-described optical lens group, the electronic device becomes smaller and more aesthetically pleasing, while also achieving better image quality and a better user experience.

[0072] The electronic device also includes a housing, on which the image capturing device is mounted.

[0073] The following describes specific embodiments of the optical lens assembly applicable to the above-described embodiments with reference to the accompanying drawings. It should be noted that in some embodiments, the positive or negative value of the radius of curvature is used to describe the surface shape of the lens. When the radius of curvature of the object-side surface of the lens is positive, the surface shape of the object-side surface is convex; when the radius of curvature of the object-side surface of the lens is negative, the surface shape of the object-side surface is concave. When the radius of curvature of the image-side surface of the lens is positive, the surface shape of the image-side surface is concave; when the radius of curvature of the image-side surface of the lens is negative, the surface shape of the image-side surface is convex. However, considering that using the positive or negative value of the radius of curvature to describe the surface shape of the lens is rather abstract and not conducive to understanding, this application directly uses "concave" or "convex" to define the surface shape of the lens in the following embodiments to facilitate understanding.

[0074] Example 1

[0075] The following is for reference Figures 1 to 2C The optical lens assembly according to Embodiment 1 of this application is described. Figure 1 A schematic diagram of the optical lens assembly according to Embodiment 1 of this application is shown.

[0076] like Figure 1 As shown, the optical lens group includes, in sequence from the object side to the image side along the optical axis: first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, filter L7, and imaging surface S15.

[0077] The first lens L1 has positive refractive power. The object side S1 of the first lens is convex near the optical axis, and the image side S2 of the first lens is concave near the optical axis. Furthermore, the circumference of the maximum effective aperture of the object side S1 of the first lens is convex, and the circumference of the maximum effective aperture of the image side S2 of the first lens is convex.

[0078] The second lens L2 has negative refractive power. The object side S3 of the second lens is convex near the optical axis, and the image side S4 of the second lens is concave near the optical axis. Furthermore, the circumference of the maximum effective aperture of the object side S3 of the second lens is convex, and the circumference of the maximum effective aperture of the image side S4 of the second lens is concave.

[0079] The third lens L3 has positive refractive power. The object side S5 of the third lens is convex near the optical axis, and the image side S6 of the third lens is convex near the optical axis. The circumference of the maximum effective aperture of the object side S5 of the third lens is concave, and the circumference of the maximum effective aperture of the image side S6 of the third lens is convex.

[0080] The fourth lens L4 has negative refractive power. The object side S7 of the fourth lens is concave near the optical axis, and the image side S8 of the fourth lens is convex near the optical axis. Furthermore, the circumference of the maximum effective aperture of the object side S7 of the fourth lens is concave, and the circumference of the maximum effective aperture of the image side S8 of the fourth lens is convex.

[0081] The fifth lens L5 has positive refractive power. The object side S9 of the fifth lens is convex near the optical axis, and the image side S10 of the fifth lens is concave near the optical axis. Furthermore, the circumference of the maximum effective aperture of the object side S9 of the fifth lens is concave, and the circumference of the maximum effective aperture of the image side S10 of the fifth lens is convex.

[0082] The sixth lens L6 has negative refractive power. The object-side surface S11 of the sixth lens is convex near the optical axis, and the image-side surface S12 of the sixth lens is concave near the optical axis. Furthermore, the circumference of the maximum effective aperture of the object-side surface S11 of the sixth lens is concave, and the circumference of the maximum effective aperture of the image-side surface S12 of the sixth lens is convex.

[0083] The filter L7 has a first surface S13 facing the sixth lens and a second surface S14 facing away from the sixth lens. Light from the object passes through each surface S1 to S14 in sequence and is finally imaged on the imaging surface S15.

[0084] Table 1 shows the basic parameters of the optical lens assembly of Example 1, where the units for radius of curvature, thickness, and focal length are millimeters (mm).

[0085] Table 1

[0086]

[0087] In this embodiment, the effective focal length EFL = 5.018 mm, the aperture number FNO of the optical lens group = 1.963, half of the maximum field of view HFOV of the optical lens group = 43.39°, and the distance from the object side of the first lens to the imaging plane TTL = 5.8 mm.

[0088] In the table, the radius of curvature of the object-side surface S1 is 1.788 mm, indicating that the object-side surface S1 of the first lens L1 is convex. The radius of curvature of the image-side surface S2 is 5.718 mm, also indicating that the image-side surface S2 of the first lens L1 is convex. The thickness of the object-side surface S1 is 0.759 mm, representing the distance on the optical axis from the object-side surface S1 to the image-side surface S2 of the first lens L1; this can also be interpreted as the center thickness of the first lens on the optical axis being 0.759 mm. The thickness of the image-side surface S2 is 0.120 mm, representing the distance on the optical axis from the image-side surface S2 of the first lens L1 to the object-side surface S3 of the second lens L2; ​​this can also be interpreted as the air gap between the first lens L1 and the second lens L2 being 0.120 mm. The above content only lists the data of the first lens L1 for specific explanation. The understanding of the table data of the second to sixth lenses and the filter is the same as that of the first lens. Furthermore, the understanding of the table content of the second to eighth embodiments is the same as that of the first embodiment. Therefore, it will not be repeated in the following embodiments.

[0089] In Example 1, f5 / f = 6.503 / 5.018 = 1.296;

[0090] BF = 1.017;

[0091] (R7+R8) / (R7-R8)=(-4.733-14.208) / (-4.733+14.208)=-1.999;

[0092] R8 / f=-14.208 / 5.018=-2.832;

[0093] TTL / ImgH=5.8 / 4.78=1.213;

[0094] ImgH = 4.780

[0095] R 10 / CT5=13.236 / 0.583=22.703;

[0096] HFOV = 43.39;

[0097] FNO / ImgH=1.963 / 4.78=0.411;

[0098] f1 / f = 4.731 / 5.018 = 0.943.

[0099] In Embodiment 1, the object-side surface and image-side surface of any one of the first lens L1 to the sixth lens L6 can be aspherical. The surface shape of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0100]

[0101] Where Z represents the height of the lens surface parallel to the Z-axis, r represents the radial distance from the vertex, c represents the curvature of the surface at the vertex, K represents the conic constant, and A4, A6, A8, A10, A12, A14, A16, A18, and A20 represent the aspherical coefficients of the 4th, 6th, 8th, 10th, 12th, 14th, 16th, 18th, and 20th orders, respectively. Table 2 below gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 that can be used for each aspherical mirror S1-S12 in Example 1.

[0102] Table 2

[0103]

[0104]

[0105] Figure 2A A schematic diagram of the spherical aberration curve of the optical lens group of Embodiment 1 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 2B A schematic diagram of the field curvature of the optical lens assembly of Embodiment 1 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 2C A schematic diagram of the distortion curves for the optical lens assembly of Embodiment 1 is shown, representing the distortion magnitude values ​​corresponding to different image heights. According to... Figures 2A to 2C It can be seen that the optical lens assembly given in Example 1 can achieve good imaging quality.

[0106] Example 2

[0107] The following is for reference Figures 3 to 4C The optical lens assembly according to Embodiment 2 of this application is described. Figure 2 shows a schematic diagram of the structure of the optical lens assembly according to Embodiment 2 of this application.

[0108] like Figure 3 As shown, the optical lens group includes, in sequence from the object side to the image side along the optical axis: first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, filter L7, and imaging surface S15.

[0109] The first lens L1 has positive refractive power. The object side S1 of the first lens is convex near the optical axis, and the image side S2 of the first lens is concave near the optical axis. Furthermore, the circumference of the maximum effective aperture of the object side S1 of the first lens is convex, and the circumference of the maximum effective aperture of the image side S2 of the first lens is convex.

[0110] The second lens L2 has negative refractive power. The object side S3 of the second lens is convex near the optical axis, and the image side S4 of the second lens is concave near the optical axis. Furthermore, the circumference of the maximum effective aperture of the object side S3 of the second lens is convex, and the circumference of the maximum effective aperture of the image side S4 of the second lens is concave.

[0111] The third lens L3 has positive refractive power. The object side S5 of the third lens is convex near the optical axis, and the image side S6 of the third lens is concave near the optical axis. Furthermore, the circumference of the maximum effective aperture of the object side S5 of the third lens is convex, and the circumference of the maximum effective aperture of the image side S6 of the third lens is concave.

[0112] The fourth lens L4 has negative refractive power. The object side S7 of the fourth lens is concave near the optical axis, and the image side S8 of the fourth lens is concave near the optical axis. Furthermore, the circumference of the maximum effective aperture of the object side S7 of the fourth lens is concave, and the circumference of the maximum effective aperture of the image side S8 of the fourth lens is convex.

[0113] The fifth lens L5 has positive refractive power. The object side S9 of the fifth lens is convex near the optical axis, and the image side S10 of the fifth lens is concave near the optical axis. Furthermore, the circumference of the maximum effective aperture of the object side S9 of the fifth lens is concave, and the circumference of the maximum effective aperture of the image side S10 of the fifth lens is convex.

[0114] The sixth lens L6 has negative refractive power. The object-side surface S11 of the sixth lens is convex near the optical axis, and the image-side surface S12 of the sixth lens is concave near the optical axis. Furthermore, the circumference of the maximum effective aperture of the object-side surface S11 of the sixth lens is concave, and the circumference of the maximum effective aperture of the image-side surface S12 of the sixth lens is convex.

[0115] The filter L7 has a first surface S13 facing the sixth lens and a second surface S14 facing away from the sixth lens. Light from the object passes through each surface S1 to S14 in sequence and is finally imaged on the imaging surface S15.

[0116] Table 3 shows the basic parameters of the optical lens assembly of Example 2, where the units for radius of curvature, thickness, and focal length are millimeters (mm).

[0117] Table 3

[0118]

[0119]

[0120] In this embodiment, the effective focal length EFL = 5.32 mm, the aperture number FNO of the optical lens group = 2.0, half of the maximum field of view HFOV of the optical lens group = 40.45°, and the distance from the object side of the first lens to the imaging plane TTL = 6.175 mm.

[0121] In Embodiment 2, the object-side surface and image-side surface of any one of the first lens L1 to the sixth lens L6 can be aspherical. The surface shape of each aspherical lens can be defined using the same aspherical formula as in Embodiment 1 to obtain the data in Table 4 below, which will not be elaborated here.

[0122] Table 4

[0123]

[0124] Figure 4A A schematic diagram of the spherical aberration curve of the optical lens group of Embodiment 2 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 4B A schematic diagram of the field curvature of the optical lens assembly of Embodiment 2 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 4C A schematic diagram of the distortion curves for the optical lens assembly of Embodiment 2 is shown, representing the distortion magnitude values ​​corresponding to different image heights. According to... Figures 4A to 4C It can be seen that the optical lens assembly given in Example 2 can achieve good imaging quality.

[0125] Example 3

[0126] The following is for reference Figures 5 to 6C The optical lens assembly according to Embodiment 3 of this application is described. Figure 5 A schematic diagram of the optical lens assembly according to Embodiment 3 of this application is shown.

[0127] like Figure 5 As shown, the optical lens group includes, in sequence from the object side to the image side along the optical axis: first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, filter L7, and imaging surface S15.

[0128] The first lens L1 has positive refractive power. The object side S1 of the first lens is convex near the optical axis, and the image side S2 of the first lens is concave near the optical axis. Furthermore, the circumference of the maximum effective aperture of the object side S1 of the first lens is convex, and the circumference of the maximum effective aperture of the image side S2 of the first lens is convex.

[0129] The second lens L2 has negative refractive power. The object side S3 of the second lens is convex near the optical axis, and the image side S4 of the second lens is concave near the optical axis. Furthermore, the circumference of the maximum effective aperture of the object side S3 of the second lens is convex, and the circumference of the maximum effective aperture of the image side S4 of the second lens is concave.

[0130] The third lens L3 has positive refractive power. The object side S5 of the third lens is convex near the optical axis, and the image side S6 of the third lens is convex near the optical axis. Furthermore, the circumference of the maximum effective aperture of the object side S5 of the third lens is convex, and the circumference of the maximum effective aperture of the image side S6 of the third lens is convex.

[0131] The fourth lens L4 has negative refractive power. The object side S7 of the fourth lens is concave near the optical axis, and the image side S8 of the fourth lens is concave near the optical axis. Furthermore, the circumference of the maximum effective aperture of the object side S7 of the fourth lens is concave, and the circumference of the maximum effective aperture of the image side S8 of the fourth lens is convex.

[0132] The fifth lens L5 has positive refractive power. The object side S9 of the fifth lens is convex near the optical axis, and the image side S10 of the fifth lens is concave near the optical axis. Furthermore, the circumference of the maximum effective aperture of the object side S9 of the fifth lens is concave, and the circumference of the maximum effective aperture of the image side S10 of the fifth lens is convex.

[0133] The sixth lens L6 has negative refractive power. The object-side surface S11 of the sixth lens is convex near the optical axis, and the image-side surface S12 of the sixth lens is concave near the optical axis. Furthermore, the circumference of the maximum effective aperture of the object-side surface S11 of the sixth lens is concave, and the circumference of the maximum effective aperture of the image-side surface S12 of the sixth lens is convex.

[0134] The filter L7 has a first surface S13 facing the sixth lens and a second surface S14 facing away from the sixth lens. Light from the object passes through each surface S1 to S14 in sequence and is finally imaged on the imaging surface S15.

[0135] Table 5 shows the basic parameters of the optical lens assembly of Example 3, where the units for radius of curvature, thickness, and focal length are millimeters (mm).

[0136] Table 5

[0137]

[0138]

[0139] In this embodiment, the effective focal length EFL = 5.239 mm, the aperture number FNO of the optical lens group = 2.0, half of the maximum field of view HFOV of the optical lens group = 40.9°, and the distance from the object side of the first lens to the imaging plane TTL = 6.241 mm.

[0140] In Embodiment 3, the object-side surface and image-side surface of any one of the first lens L1 to the sixth lens L6 can be aspherical. The surface shape of each aspherical lens can be defined using the same aspherical formula as in Embodiment 1 to obtain the data in Table 6 below, which will not be elaborated here.

[0141] Table 6

[0142]

[0143] Figure 6A A schematic diagram of the spherical aberration curve of the optical lens group of Embodiment 3 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 6B A schematic diagram of the field curvature of the optical lens assembly of Embodiment 3 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 6C A schematic diagram of the distortion curves for the optical lens assembly of Example 3 is shown, representing the distortion magnitude values ​​corresponding to different image heights. According to... Figures 6A to 6C It can be seen that the optical lens assembly given in Example 3 can achieve good imaging quality.

[0144] Example 4

[0145] The following is for reference Figures 7 to 8C The optical lens assembly according to Embodiment 4 of this application is described. Figure 7 A schematic diagram of the optical lens assembly according to Embodiment 4 of this application is shown.

[0146] like Figure 7 As shown, the optical lens group includes, in sequence from the object side to the image side along the optical axis: first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, filter L7, and imaging surface S15.

[0147] The first lens L1 has positive refractive power. The object side S1 of the first lens is convex near the optical axis, and the image side S2 of the first lens is concave near the optical axis. Furthermore, the circumference of the maximum effective aperture of the object side S1 of the first lens is convex, and the circumference of the maximum effective aperture of the image side S2 of the first lens is convex.

[0148] The second lens L2 has negative refractive power. The object side S3 of the second lens is convex near the optical axis, and the image side S4 of the second lens is concave near the optical axis. Furthermore, the circumference of the maximum effective aperture of the object side S3 of the second lens is convex, and the circumference of the maximum effective aperture of the image side S4 of the second lens is concave.

[0149] The third lens L3 has positive refractive power. The object side S5 of the third lens is convex near the optical axis, and the image side S6 of the third lens is concave near the optical axis. Furthermore, the circumference of the maximum effective aperture of the object side S5 of the third lens is convex, and the circumference of the maximum effective aperture of the image side S6 of the third lens is convex.

[0150] The fourth lens L4 has negative refractive power. The object side S7 of the fourth lens is concave near the optical axis, and the image side S8 of the fourth lens is convex near the optical axis. Furthermore, the circumference of the maximum effective aperture of the object side S7 of the fourth lens is concave, and the circumference of the maximum effective aperture of the image side S8 of the fourth lens is convex.

[0151] The fifth lens L5 has positive refractive power. The object side S9 of the fifth lens is convex near the optical axis, and the image side S10 of the fifth lens is concave near the optical axis. Furthermore, the circumference of the maximum effective aperture of the object side S9 of the fifth lens is concave, and the circumference of the maximum effective aperture of the image side S10 of the fifth lens is convex.

[0152] The sixth lens L6 has negative refractive power. The object-side surface S11 of the sixth lens is convex near the optical axis, and the image-side surface S12 of the sixth lens is concave near the optical axis. Furthermore, the circumference of the maximum effective aperture of the object-side surface S11 of the sixth lens is concave, and the circumference of the maximum effective aperture of the image-side surface S12 of the sixth lens is convex.

[0153] The filter L7 has a first surface S13 facing the sixth lens and a second surface S14 facing away from the sixth lens. Light from the object passes through each surface S1 to S14 in sequence and is finally imaged on the imaging surface S15.

[0154] Table 7 shows the basic parameters of the optical lens assembly of Example 4, where the units for radius of curvature, thickness, and focal length are millimeters (mm).

[0155] Table 7

[0156]

[0157]

[0158] In this embodiment, the effective focal length EFL = 5.176 mm, the aperture number FNO of the optical lens group = 1.86, half of the maximum field of view HFOV of the optical lens group = 41.387°, and the distance from the object side of the first lens to the imaging plane TTL = 6.09 mm.

[0159] In Example 4, the object-side surface and image-side surface of any one of the first lens L1 to the sixth lens L6 can be aspherical. The surface shape of each aspherical lens can be defined using the same aspherical formula as in Example 1 to obtain the data in Table 8 below, which will not be elaborated here.

[0160] Table 8

[0161]

[0162] Figure 8AA schematic diagram of the spherical aberration curve of the optical lens group of Embodiment 4 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 8B A schematic diagram of the field curvature of the optical lens assembly of Embodiment 4 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 8C A schematic diagram of the distortion curves for the optical lens assembly of Example 4 is shown, representing the distortion magnitude values ​​corresponding to different image heights. According to... Figures 8A to 8C It can be seen that the optical lens assembly given in Example 4 can achieve good imaging quality.

[0163] Example 5

[0164] The following is for reference Figures 9 to 10C The optical lens assembly according to Embodiment 5 of this application is described. Figure 9 A schematic diagram of the optical lens assembly according to Embodiment 5 of this application is shown.

[0165] like Figure 9 As shown, the optical lens group includes, in sequence from the object side to the image side along the optical axis: first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, filter L7, and imaging surface S15.

[0166] The first lens L1 has positive refractive power. The object side S1 of the first lens is convex near the optical axis, and the image side S2 of the first lens is concave near the optical axis. Furthermore, the circumference of the maximum effective aperture of the object side S1 of the first lens is convex, and the circumference of the maximum effective aperture of the image side S2 of the first lens is convex.

[0167] The second lens L2 has negative refractive power. The object side S3 of the second lens is convex near the optical axis, and the image side S4 of the second lens is concave near the optical axis. Furthermore, the circumference of the maximum effective aperture of the object side S3 of the second lens is convex, and the circumference of the maximum effective aperture of the image side S4 of the second lens is concave.

[0168] The third lens L3 has positive refractive power. The object side S5 of the third lens is convex near the optical axis, and the image side S6 of the third lens is concave near the optical axis. Furthermore, the circumference of the maximum effective aperture of the object side S5 of the third lens is convex, and the circumference of the maximum effective aperture of the image side S6 of the third lens is convex.

[0169] The fourth lens L4 has negative refractive power. The object side S7 of the fourth lens is convex near the optical axis, and the image side S8 of the fourth lens is concave near the optical axis. Furthermore, the circumference of the maximum effective aperture of the object side S7 of the fourth lens is concave, and the circumference of the maximum effective aperture of the image side S8 of the fourth lens is convex.

[0170] The fifth lens L5 has positive refractive power. The object side S9 of the fifth lens is convex near the optical axis, and the image side S10 of the fifth lens is concave near the optical axis. Furthermore, the circumference of the maximum effective aperture of the object side S9 of the fifth lens is concave, and the circumference of the maximum effective aperture of the image side S10 of the fifth lens is convex.

[0171] The sixth lens L6 has negative refractive power. The object-side surface S11 of the sixth lens is convex near the optical axis, and the image-side surface S12 of the sixth lens is concave near the optical axis. Furthermore, the circumference of the maximum effective aperture of the object-side surface S11 of the sixth lens is concave, and the circumference of the maximum effective aperture of the image-side surface S12 of the sixth lens is convex.

[0172] The filter L7 has a first surface S13 facing the sixth lens and a second surface S14 facing away from the sixth lens. Light from the object passes through each surface S1 to S14 in sequence and is finally imaged on the imaging surface S15.

[0173] Table 9 shows the basic parameters of the optical lens assembly of Example 5, where the units for radius of curvature, thickness, and focal length are millimeters (mm).

[0174] Table 9

[0175]

[0176] In this embodiment, the effective focal length EFL = 4.839 mm, the aperture number FNO of the optical lens group = 1.78, half of the maximum field of view HFOV of the optical lens group = 43.33°, and the distance from the object side of the first lens to the imaging plane TTL = 5.8 mm.

[0177] In Embodiment 5, the object-side surface and image-side surface of any one of the first lens L1 to the sixth lens L6 can be aspherical. The surface shape of each aspherical lens can be defined using the same aspherical formula as in Embodiment 1 to obtain the data in Table 10 below, which will not be elaborated here.

[0178] Table 10

[0179]

[0180] Figure 10A A schematic diagram of the spherical aberration curve of the optical lens group of Embodiment 5 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 10B A schematic diagram of the field curvature of the optical lens assembly of Embodiment 5 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 10C A schematic diagram of the distortion curves for the optical lens assembly of Example 5 is shown, representing the distortion magnitude values ​​corresponding to different image heights. According to... Figures 10A to 10C It can be seen that the optical lens assembly given in Example 5 can achieve good imaging quality.

[0181] Example 6

[0182] The following is for reference Figures 11 to 12C The optical lens assembly according to Embodiment 6 of this application is described. Figure 11 A schematic diagram of the optical lens assembly according to Embodiment 6 of this application is shown.

[0183] like Figure 11 As shown, the optical lens group includes, in sequence from the object side to the image side along the optical axis: first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, filter L7, and imaging surface S15.

[0184] The first lens L1 has positive refractive power. The object side S1 of the first lens is convex near the optical axis, and the image side S2 of the first lens is concave near the optical axis. Furthermore, the circumference of the maximum effective aperture of the object side S1 of the first lens is convex, and the circumference of the maximum effective aperture of the image side S2 of the first lens is convex.

[0185] The second lens L2 has positive refractive power. The object side S3 of the second lens is convex near the optical axis, and the image side S4 of the second lens is concave near the optical axis. Furthermore, the circumference of the maximum effective aperture of the object side S3 of the second lens is convex, and the circumference of the maximum effective aperture of the image side S4 of the second lens is concave.

[0186] The third lens L3 has positive refractive power. The object side S5 of the third lens is concave near the optical axis, and the image side S6 of the third lens is convex near the optical axis. Furthermore, the circumference of the maximum effective aperture of the object side S5 of the third lens is convex, and the circumference of the maximum effective aperture of the image side S6 of the third lens is convex.

[0187] The fourth lens L4 has negative refractive power. The object side S7 of the fourth lens is concave near the optical axis, and the image side S8 of the fourth lens is concave near the optical axis. Furthermore, the circumference of the maximum effective aperture of the object side S7 of the fourth lens is concave, and the circumference of the maximum effective aperture of the image side S8 of the fourth lens is convex.

[0188] The fifth lens L5 has positive refractive power. The object side S9 of the fifth lens is convex near the optical axis, and the image side S10 of the fifth lens is concave near the optical axis. Furthermore, the circumference of the maximum effective aperture of the object side S9 of the fifth lens is concave, and the circumference of the maximum effective aperture of the image side S10 of the fifth lens is convex.

[0189] The sixth lens L6 has negative refractive power. The object-side surface S11 of the sixth lens is convex near the optical axis, and the image-side surface S12 of the sixth lens is concave near the optical axis. Furthermore, the circumference of the maximum effective aperture of the object-side surface S11 of the sixth lens is concave, and the circumference of the maximum effective aperture of the image-side surface S12 of the sixth lens is convex.

[0190] The filter L7 has a first surface S13 facing the sixth lens and a second surface S14 facing away from the sixth lens. Light from the object passes through each surface S1 to S14 in sequence and is finally imaged on the imaging surface S15.

[0191] Table 11 shows the basic parameters of the optical lens assembly of Example 6, where the units for radius of curvature, thickness, and focal length are millimeters (mm).

[0192] Table 11

[0193]

[0194] In this embodiment, the effective focal length EFL = 4.9 mm, the aperture number FNO of the optical lens group = 2.0, half of the maximum field of view HFOV of the optical lens group = 42.97°, and the distance from the object side of the first lens to the imaging plane TTL = 5.8 mm.

[0195] In Embodiment 6, the object-side surface and image-side surface of any one of the first lens L1 to the sixth lens L6 can be aspherical. The surface shape of each aspherical lens can be defined using the same aspherical formula as in Embodiment 1 to obtain the data in Table 12 below, which will not be elaborated here.

[0196] Table 12

[0197]

[0198]

[0199] Figure 12A A schematic diagram of the spherical aberration curve of the optical lens group of Embodiment 6 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 12B A schematic diagram of the field curvature of the optical lens assembly of Embodiment 6 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 12C A schematic diagram of the distortion curves for the optical lens assembly of Example 6 is shown, representing the distortion magnitude values ​​corresponding to different image heights. According to... Figures 12A to 12C It can be seen that the optical lens assembly given in Example 6 can achieve good imaging quality.

[0200] Example 7

[0201] The following is for reference Figures 13 to 14C The optical lens assembly according to Embodiment 7 of this application is described. Figure 13 A schematic diagram of the optical lens assembly according to Embodiment 7 of this application is shown.

[0202] like Figure 13As shown, the optical lens group includes, in sequence from the object side to the image side along the optical axis: first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, filter L7, and imaging surface S15.

[0203] The first lens L1 has positive refractive power. The object side S1 of the first lens is convex near the optical axis, and the image side S2 of the first lens is concave near the optical axis. Furthermore, the circumference of the maximum effective aperture of the object side S1 of the first lens is convex, and the circumference of the maximum effective aperture of the image side S2 of the first lens is convex.

[0204] The second lens L2 has negative refractive power. The object side S3 of the second lens is convex near the optical axis, and the image side S4 of the second lens is concave near the optical axis. Furthermore, the circumference of the maximum effective aperture of the object side S3 of the second lens is convex, and the circumference of the maximum effective aperture of the image side S4 of the second lens is concave.

[0205] The third lens L3 has positive refractive power. The object side S5 of the third lens is convex near the optical axis, and the image side S6 of the third lens is convex near the optical axis. The circumference of the maximum effective aperture of the object side S5 of the third lens is concave, and the circumference of the maximum effective aperture of the image side S6 of the third lens is convex.

[0206] The fourth lens L4 has negative refractive power. The object side S7 of the fourth lens is concave near the optical axis, and the image side S8 of the fourth lens is concave near the optical axis. Furthermore, the circumference of the maximum effective aperture of the object side S7 of the fourth lens is concave, and the circumference of the maximum effective aperture of the image side S8 of the fourth lens is convex.

[0207] The fifth lens L5 has positive refractive power. The object side S9 of the fifth lens is convex near the optical axis, and the image side S10 of the fifth lens is concave near the optical axis. Furthermore, the circumference of the maximum effective aperture of the object side S9 of the fifth lens is concave, and the circumference of the maximum effective aperture of the image side S10 of the fifth lens is convex.

[0208] The sixth lens L6 has negative refractive power. The object side S11 of the sixth lens is convex near the optical axis, and the image side S12 of the sixth lens is concave near the optical axis. Furthermore, the circumference of the maximum effective aperture of the object side S11 of the sixth lens is convex, and the circumference of the maximum effective aperture of the image side S12 of the sixth lens is convex.

[0209] The filter L7 has a first surface S13 facing the sixth lens and a second surface S14 facing away from the sixth lens. Light from the object passes through each surface S1 to S14 in sequence and is finally imaged on the imaging surface S15.

[0210] Table 13 shows the basic parameters of the optical lens assembly of Example 7, where the units for radius of curvature, thickness, and focal length are millimeters (mm).

[0211] Table 13

[0212]

[0213] In this embodiment, the effective focal length EFL = 4.868 mm, the aperture number FNO of the optical lens group = 1.96, half of the maximum field of view HFOV of the optical lens group = 42.78°, and the distance from the object side of the first lens to the imaging plane TTL = 5.7 mm.

[0214] In Embodiment 7, the object-side surface and image-side surface of any one of the first lens L1 to the sixth lens L6 can be aspherical. The surface shape of each aspherical lens can be defined using the same aspherical formula as in Embodiment 1 to obtain the data in Table 14 below, which will not be elaborated here.

[0215] Table 14

[0216]

[0217]

[0218] Figure 14A A schematic diagram of the spherical aberration curve of the optical lens group of Embodiment 7 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 14B A schematic diagram of the field curvature of the optical lens assembly of Embodiment 7 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 14C A schematic diagram of the distortion curves for the optical lens assembly of Embodiment 7 is shown, representing the distortion magnitude values ​​corresponding to different image heights. According to... Figures 14A to 14C It can be seen that the optical lens assembly given in Example 7 can achieve good imaging quality.

[0219] Example 8

[0220] The following is for reference Figures 15 to 16C The optical lens assembly according to Embodiment 8 of this application is described. Figure 15 A schematic diagram of the structure of the optical lens assembly according to Embodiment 8 of this application is shown.

[0221] like Figure 15 As shown, the optical lens group includes, in sequence from the object side to the image side along the optical axis: first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, filter L7, and imaging surface S15.

[0222] The first lens L1 has positive refractive power. The object side S1 of the first lens is convex near the optical axis, and the image side S2 of the first lens is concave near the optical axis. Furthermore, the circumference of the maximum effective aperture of the object side S1 of the first lens is convex, and the circumference of the maximum effective aperture of the image side S2 of the first lens is concave.

[0223] The second lens L2 has positive refractive power. The object side S3 of the second lens is convex near the optical axis, and the image side S4 of the second lens is concave near the optical axis. Furthermore, the circumference of the maximum effective aperture of the object side S3 of the second lens is concave, and the circumference of the maximum effective aperture of the image side S4 of the second lens is concave.

[0224] The third lens L3 has positive refractive power. The object side S5 of the third lens is concave near the optical axis, and the image side S6 of the third lens is convex near the optical axis. Furthermore, the circumference of the maximum effective aperture of the object side S5 of the third lens is concave, and the circumference of the maximum effective aperture of the image side S6 of the third lens is convex.

[0225] The fourth lens L4 has negative refractive power. The object side S7 of the fourth lens is convex near the optical axis, and the image side S8 of the fourth lens is concave near the optical axis. Furthermore, the circumference of the maximum effective aperture of the object side S7 of the fourth lens is concave, and the circumference of the maximum effective aperture of the image side S8 of the fourth lens is convex.

[0226] The fifth lens L5 has positive refractive power. The object side S9 of the fifth lens is convex near the optical axis, and the image side S10 of the fifth lens is concave near the optical axis. Furthermore, the circumference of the maximum effective aperture of the object side S9 of the fifth lens is concave, and the circumference of the maximum effective aperture of the image side S10 of the fifth lens is convex.

[0227] The sixth lens L6 has negative refractive power. The object-side surface S11 of the sixth lens is convex near the optical axis, and the image-side surface S12 of the sixth lens is concave near the optical axis. Furthermore, the circumference of the maximum effective aperture of the object-side surface S11 of the sixth lens is concave, and the circumference of the maximum effective aperture of the image-side surface S12 of the sixth lens is convex.

[0228] The filter L7 has a first surface S13 facing the sixth lens and a second surface S14 facing away from the sixth lens. Light from the object passes through each surface S1 to S14 in sequence and is finally imaged on the imaging surface S15.

[0229] Table 15 shows the basic parameters of the optical lens assembly of Example 8, where the units for radius of curvature, thickness, and focal length are millimeters (mm).

[0230] Table 15

[0231]

[0232] In this embodiment, the effective focal length EFL = 4.769 mm, the aperture number FNO of the optical lens group = 1.92, half of the maximum field of view HFOV of the optical lens group = 43.74°, and the distance from the object side of the first lens to the imaging plane TTL = 5.7 mm.

[0233] In Example 8, the object-side surface and image-side surface of any one of the first lens L1 to the sixth lens L6 can be aspherical. The surface shape of each aspherical lens can be defined using the same aspherical formula as in Example 1 to obtain the data in Table 16 below, which will not be elaborated here.

[0234] Table 16

[0235]

[0236]

[0237] Figure 16A A schematic diagram of the spherical aberration curve of the optical lens group of Embodiment 8 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 16B A schematic diagram of the field curvature of the optical lens assembly of Embodiment 8 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 16C A schematic diagram of the distortion curves for the optical lens assembly of Example 8 is shown, representing the distortion magnitude values ​​corresponding to different image heights. According to... Figures 16A to 16C It can be seen that the optical lens assembly given in Example 8 can achieve good imaging quality.

[0238] The ratio of the distance TTL from the object-side surface of the first lens to the imaging surface of the optical group on the optical axis and half the image height ImgH corresponding to the maximum field of view of the optical group (i.e., TTL / ImgH); the value of half the image height ImgH corresponding to the maximum field of view of the optical group (i.e., ImgH); the radius of curvature R of the image-side surface of the fifth lens near the optical axis. 10 And the ratio of the center thickness of the fifth lens on the optical axis to CT5 (i.e., R) 10 / CT5); the value of HFOV, which is half the maximum field of view of the optical lens group; the ratio of the aperture number FNO of the optical lens group to ImgH, which is half the image height corresponding to the maximum field of view of the optical lens group; the ratio of the effective focal length f1 of the first lens to the effective focal length f of the optical lens group; the ratio of the effective focal length f5 of the fifth lens to the effective focal length f of the optical lens group; and the value of BF, the back focal length of the optical lens group. The sum of the radius of curvature R7 of the object side of the fourth lens near the optical axis and the radius of curvature R8 of the image side of the fourth lens near the optical axis, and the back focal length BF of the optical group (i.e., BF); the ratio of the difference between the radius of curvature R7 of the object side of the fourth lens near the optical axis and the radius of curvature R8 of the image side of the fourth lens near the optical axis (i.e., (R7+R8) / (R7-R8)); the ratio of the radius of curvature R8 of the image side of the fourth lens near the optical axis to the effective focal length f of the optical group (i.e., R8 / f). The specific values ​​of each optical parameter of the optical group in Examples 1 to 8 are shown in Table 17 below.

[0239] Table 17

[0240]

[0241]

[0242] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0243] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An optical lens assembly, characterized in that, Along the optical axis from the object side to the image side, the following are included in sequence: The first lens has positive refractive power, and the radius of curvature of the object side of the first lens near the optical axis is positive. The second lens has refractive power; The third lens has positive refractive power; The fourth lens has negative refractive power; The fifth lens has positive refractive power; its object-side surface has a positive radius of curvature near the optical axis, while its image-side surface has a negative radius of curvature near the optical axis. The sixth lens has negative refractive power; The optical lens group comprises six lenses with refractive power. The distance from the object-side surface of the first lens to the imaging surface of the optical lens group on the optical axis is TTL. Half the image height corresponding to the maximum field of view of the optical lens group is ImgH. The effective focal length of the fifth lens is f5, and the radius of curvature of the image-side surface of the fifth lens near the optical axis is R. 10 The fifth lens has a center thickness of CT5 on the optical axis, the effective focal length of the optical lens group is f, and the following conditions are satisfied: 1.213 ≤ TTL / ImgH < 1.35; 4mm < ImgH; 1.2 < f5 / f < 3; 20<R 10 / CT5<160。 2. The optical lens assembly as described in claim 1, characterized in that, The optical lens assembly satisfies the following condition: 4mm < ImgH ≤ 4.780mm.

3. The optical lens assembly as described in claim 1, characterized in that, Half of the maximum field of view of the optical lens group is the HFOV, and the following condition is satisfied: 40deg≤HFOV≤43.740deg.

4. The optical lens assembly as described in claim 1, characterized in that, The optical lens group has an aperture number of FNO and satisfies the following condition: 0.384≤FNO / ImgH<0.

5.

5. The optical lens assembly as described in claim 1, characterized in that, The effective focal length of the first lens is f1, and it satisfies the following condition: 0.9 <f1 / f<1.3。 6. The optical lens assembly as described in claim 1, characterized in that, The optical lens assembly satisfies the following condition: 1.296≤f5 / f≤2.

329.

7. The optical lens assembly as described in claim 1, characterized in that, The back focal length of the optical lens group is BF, and it satisfies the following condition: 0.7mm≤BF≤1.017mm.

8. The optical lens assembly as described in claim 1, characterized in that, The object-side surface of the fourth lens has a radius of curvature R7 near the optical axis, and the image-side surface of the fourth lens has a radius of curvature R8 near the optical axis, satisfying the following condition: -2<(R7+R8) / (R7-R8)<2.

9. The optical lens assembly as described in claim 1, characterized in that, The second lens has a refractive index of n2, and the fourth lens has a refractive index of n4, satisfying the following condition: 1.65＜n2≤1.671； 1.58＜n4≤1.661。 10. An image capturing device, characterized in that, include: The optical lens assembly according to any one of claims 1 to 9; and A photosensitive element is located at the imaging surface of the optical lens assembly.

11. An electronic device, characterized in that, include: The imaging device according to claim 10.

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