Optical lens assembly for photography, image acquisition unit and electronic device

Abstract

Optical lens assembly for photography comprising seven lens elements (E1, E2, E3, E4, E5, E6, E7), wherein the seven lens elements (E1, E2, E3, E4, E5, E6, E7) are arranged in sequence from an object side to an image side along a ray path as a first lens element (E1), a second lens element (E2), a third lens element (E3), a fourth lens element (E4), a fifth lens element (E5), a sixth lens element (E6) and a seventh lens element (E7), and wherein each of the seven lens elements (E1, E2, E3, E4, E5, E6, E7) has an object-side surface facing the object side and an image-side surface facing the image side; wherein the object-side surface of the second lens element (E2) is convex in a paraxial region thereof, the image-side surface of the second lens element (E2) is concave in a paraxial region thereof, the fifth lens element (E5) has a positive refractive power, the seventh lens element (E7) has a negative refractive power and the object-side surface of the seventh lens element (E7) is concave in a paraxial region thereof; wherein the optical lens assembly for photography further comprises an aperture diaphragm (ST) arranged between the second lens element (E2) and the third lens element (E3); where f is the focal length of the optical lens assembly for photography, f is the focal length of the third lens element (E3), f3 is the combined focal length of the first lens element (E1) and the second lens element (E2), f12 is the central thickness of the first lens element (E1), CT1 is the central thickness of the second lens element (E2), CT2 is the central thickness of the seventh lens element (E7), CT7 is the radius of curvature of the image-side surface of the sixth lens element (E6), R12 is the radius of curvature of the object-side surface of the seventh lens element (E7), and the following conditions are met: 3.20 < f / CT1 < 6.50 ; − 0.65 < R13 / | R12 | < 0 ; 0 < | f3 / f12 | < 0.45 ; and and 0 < CT7 / CT2 < 0.85.

Description

BACKGROUND Subject area

[0001] The present disclosure relates to an optical lens assembly for photography, an image acquisition unit and an electronic device, in particular an optical lens assembly for photography and an image acquisition unit that can be used in an electronic device. Description of related technology

[0002] With the development of semiconductor manufacturing technology, the performance of image sensors has improved and their pixel size has decreased. Therefore, high image quality is now one of the essential features of an optical system.

[0003] Furthermore, due to rapid technological advancements, electronic devices equipped with optical systems are increasingly becoming multifunctional for various applications, thereby raising the bar for the functionality of these optical systems. However, for a conventional optical system, it is challenging to strike a balance between requirements such as high image quality, low sensitivity, appropriate aperture size, miniaturization, and a desirable field of view. SUMMARY

[0004] According to one aspect of the present disclosure, an optical lens assembly for photography comprises seven lens elements. The seven lens elements are, in order from an object side to an image side along a ray path, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, and a seventh lens element. Each of the seven lens elements has an object-side surface facing the object side and an image-side surface facing the image side.

[0005] Preferably, the object-side surface of the second lens element is convex in a paraxial region. Preferably, the image-side surface of the second lens element is concave in a paraxial region. Preferably, the fifth lens element has a positive refractive power. Preferably, the seventh lens element has a negative refractive power. Preferably, the object-side surface of the seventh lens element is concave in a paraxial region.

[0006] Preferably, the optical lens assembly for photography further comprises an aperture diaphragm arranged between the second lens element and the third lens element.

[0007] If the focal length of the optical lens assembly for photography is f, the focal length of the third lens element is f3, the combined focal length of the first and second lens elements is f12, the central thickness of the first lens element is CT1, the central thickness of the second lens element is CT2, the central thickness of the seventh lens element is CT7, the radius of curvature of the image-side surface of the sixth lens element is R12, and the radius of curvature of the object-side surface of the seventh lens element is R13, then the following conditions are preferably met: 3.20 <f / CT1<6,50; -0.65 <R13 / |R12|<0; 0<|f3 / f12|<0.45; and 0 <CT7 / CT2<0,85.

[0008] According to another aspect of the present disclosure, an optical lens assembly for photography comprises seven lens elements. The seven lens elements are, in order from an object side to an image side along a ray path, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, and a seventh lens element. Each of the seven lens elements has an object-side surface facing the object side and an image-side surface facing the image side.

[0009] Preferably, the object-side surface of the first lens element is convex in a paraxial region. Preferably, the object-side surface of the second lens element is convex in a paraxial region. Preferably, the image-side surface of the second lens element is concave in a paraxial region. Preferably, the fifth lens element has a positive refractive power. Preferably, the seventh lens element has a negative refractive power. Preferably, the object-side surface of the seventh lens element is concave in a paraxial region.

[0010] Preferably, the optical lens assembly for photography further comprises an aperture diaphragm arranged between the second lens element and the third lens element.

[0011] If the focal length of the optical lens assembly for photography is f, the central thickness of the first lens element is CT1, the radius of curvature of the image-side surface of the second lens element is R4, the radius of curvature of the image-side surface of the sixth lens element is R12, the radius of curvature of the object-side surface of the seventh lens element is R13, and the axial distance between the object-side surface of the first lens element and the image-side surface of the seventh lens element is TD, then the following conditions are preferably met: 3.20 <f / CT1<6,50; -0.65 <R13 / |R12|<0; 0.10 <R4 / f<1,80; and 1.25 <TD / f<2,50.

[0012] According to another aspect of the present disclosure, an image acquisition unit comprises one of the above-mentioned optical lens assemblies for photography and an image sensor, wherein the image sensor is arranged on an image surface of the photographic lens assembly.

[0013] According to another aspect of the present disclosure, an electronic device comprises an image acquisition unit. The image acquisition unit comprises one of the aforementioned optical lens assemblies for photography and an image sensor, wherein the image sensor is arranged on an image surface of the optical lens assembly for photography. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The disclosure can be better understood by reading the following detailed description of the embodiments with reference to the accompanying drawings: Fig.Figure 1 is a schematic view of an image acquisition unit according to the first embodiment of the present disclosure; Fig. Figure 2 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image acquisition unit according to the first embodiment; Fig. Figure 3 is a schematic view of an image acquisition unit according to the second embodiment of the present disclosure; Fig. Figure 4 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image acquisition unit according to the second embodiment; Fig. Figure 5 is a schematic view of an image acquisition unit according to the 3rd embodiment of the present disclosure; Fig. Figure 6 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image acquisition unit according to the 3rd embodiment; Fig.Figure 7 is a schematic view of an image acquisition unit according to the 4th embodiment of the present disclosure; Fig. Figure 8 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image acquisition unit according to the 4th embodiment; Fig. Figure 9 is a schematic view of an image acquisition unit according to the 5th embodiment of the present disclosure; Fig. Figure 10 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image acquisition unit according to the 5th embodiment; Fig. Figure 11 is a schematic view of an image acquisition unit according to the 6th embodiment of the present disclosure; Fig. Figure 12 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image acquisition unit according to the 6th embodiment; Fig.Figure 13 is a schematic view of an image acquisition unit according to the 7th embodiment of the present disclosure; Fig. Figure 14 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image acquisition unit according to the 7th embodiment; Fig. Figure 15 is a schematic view of an image acquisition unit according to the 8th embodiment of the present disclosure; Fig. Figure 16 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image acquisition unit according to the 8th embodiment; Fig. Figure 17 is a schematic view of an image acquisition unit according to the 9th embodiment of the present disclosure; Fig. Figure 18 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image acquisition unit according to the 9th embodiment; Fig.Figure 19 is a schematic view of an image acquisition unit according to the 10th embodiment of the present disclosure; Fig. Figure 20 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image acquisition unit according to the 10th embodiment; Fig. Figure 21 is a perspective view of an image acquisition unit according to the 11th embodiment of the present disclosure; Fig. Figure 22 is a perspective view of an electronic device according to the 12th embodiment of the present disclosure; Fig. Figure 23 is another perspective view of the electronic device in Fig. 22; Fig. Figure 24 is a perspective view of an electronic device according to the 13th embodiment of the present disclosure; Fig. Figure 25 is another perspective view of the electronic device in Fig. 24; Fig.26 is a block diagram of the electronic device in Fig. 24; Fig. Figure 27 is a perspective view of an electronic device according to the 14th embodiment of the present disclosure; Fig. Figure 28 is a perspective view of an electronic device according to the 15th embodiment of the present disclosure; Fig. Figure 29 is a perspective view of an electronic device according to the 16th embodiment of the present disclosure; Fig. Figure 30 is a side view of the electronic device in Fig. 29; Fig. 31 is a top view of the electronic device in Fig. 29; Fig. Figure 32 shows a schematic view of ET1, ET2, ET5, ET7, SAG7R1, Y1R1, Y4R2, Y5R1 and Y5R2 according to the first embodiment of the present disclosure; and Fig.Figure 33 shows a schematic view of a configuration of a light deflection element in an optical lens assembly for photography according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0015] An optical lens assembly for photography comprises seven lens elements. These seven lens elements, arranged in order from one side of the object to the other along a ray path, are: a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, and a seventh lens element. Each of the seven lens elements has an object-side surface facing the object and an image-side surface facing the image.

[0016] The object-side surface of the first lens element can be convex in a paraxial region. Therefore, this is advantageous for focusing the light and preventing light scattering and excessive overall path length.

[0017] The object-side surface of the second lens element can be convex in a paraxial region. This is advantageous for controlling the light deflection at the object end of the optical lens assembly for photography, in order to achieve a suitable balance between the field of view and the aperture size. The image-side surface of the second lens element can be concave in a paraxial region. This is advantageous for controlling the lens shape of the image-side surface of the second lens element to correct spherical aberration and improve image quality.

[0018] The fifth lens element can have a positive refractive power. Therefore, it is advantageous for focusing light to reduce the overall size and achieve a suitable balance between image size and size distribution. The object-side surface of the fifth lens element can be convex in a paraxial region. Therefore, it is advantageous for correcting astigmatism to improve the image quality of light from different viewing fields onto the image surface.

[0019] The seventh lens element can have a negative refractive power. Therefore, this is advantageous for reducing the back focal length and preventing excessive overall length. The object-side surface of the seventh lens element can be concave in a paraxial region. This is also advantageous for reducing the back focal length and correcting field curvature and distortion.

[0020] According to the present disclosure, the third lens element and the fourth lens element can be a set of cemented lens elements, wherein one of the third lens element and the fourth lens element is a positive lens element and the other of the third lens element and the fourth lens element is a negative lens element. Therefore, this is advantageous for effectively correcting chromatic aberrations and improving image quality.

[0021] According to the present disclosure, both the object-side surface and the image-side surface of at least two of all lens elements of the optical lens assembly for photography can be spherical. Therefore, this is advantageous for increasing manufacturing efficiency.

[0022] According to the present disclosure, at least three of all lens elements of the optical lens assembly for photography can be made of glass material. Therefore, this is advantageous for effective temperature efficiency correction to reduce sensitivity to environmental factors, making the optical lens assembly highly stable in various environments.

[0023] According to the present disclosure, the optical lens assembly for photography can further comprise an aperture diaphragm arranged between the second lens element and the third lens element. This is advantageous for limiting the angle of incidence of light from an object into the optical lens assembly for photography and for increasing the aperture.

[0024] If the focal length of the optical lens assembly for photography is f and the central thickness of the first lens element is CT1, the following condition can be satisfied: 3.20 < f / CT1 < 6.50. Therefore, to prevent an excessively large size at the object end of the optical lens assembly for photography, it is advantageous to limit the ratio of the focal length to the central thickness of the first lens element. Furthermore, the following conditions can also be satisfied: 3.30 < f / CT1 < 6.30. Additionally, the following condition can also be satisfied: 3.50 < f / CT1 < 5.80.

[0025] Furthermore, the following condition can also be met: 3.60 < f / CT1 < 5.70. Furthermore, the following condition can also be met: 3.86 ≤ f / CT1 ≤ 6.13.

[0026] If the radius of curvature of the image-side surface of the sixth lens element is R12 and the radius of curvature of the object-side surface of the seventh lens element is R13, the following condition can be satisfied: -0.65 < R13 / |R12| < 0. Therefore, it is advantageous to match the lens shapes of the sixth and seventh lens elements during design, thereby reducing the size of the optical lens assembly for photography at its image end. Furthermore, the following condition can also be satisfied: -0.60 < R13 / |R12| < 0. Additionally, the following condition can also be satisfied: -0.55 ≤ R13 / |R12| ≤ 0.03.

[0027] If the focal length of the third lens element is f3 and the combined focal length of the first and second lens elements is f12, the following condition can be satisfied: 0 < |f3 / f12| < 0.45. Therefore, it is advantageous to adjust the field of view and balance the refractive power configuration at the object end of the optical lens assembly for photography. Furthermore, the following conditions can also be satisfied: 0 < |f3 / f12| < 0.40. Additionally, the following conditions can also be satisfied: 0 < |f3 / f12| < 0.30. Furthermore, the following condition can also be satisfied: 0.002 ≤ |f3 / f12| ≤ 0.21.

[0028] If the central thickness of the second lens element is CT2 and the central thickness of the seventh lens element is CT7, the following condition can be met: 0 < CT7 / CT2 < 0.85. Therefore, it is advantageous to equalize the thicknesses of the second and seventh lens elements to reduce manufacturing tolerances. Furthermore, the following conditions can also be met: 0.10 < CT7 / CT2 < 0.80. Additionally, the following condition can also be met: 0.30 ≤ CT7 / CT2 ≤ 0.75.

[0029] If the radius of curvature of the image-side surface of the second lens element is R4 and the focal length of the optical lens assembly for photography is f, the following condition can be satisfied: 0.10 < R4 / f < 1.80. Therefore, it is advantageous to control the radius of curvature of the lens shape of the image-side surface of the second lens element in order to correct aberrations and improve image sharpness. Furthermore, the following conditions can also be satisfied: 0.20 < R4 / f < 1.60. Furthermore, the following conditions can also be satisfied: 0.25 < R4 / f < 1.40. Furthermore, the following condition can also be satisfied: 0.43 ≤ R4 / f ≤ 1.29.

[0030] If the axial distance between the object-side surface of the first lens element and the image-side surface of the seventh lens element is TD, and the focal length of the optical lens assembly for photography is f, the following condition can be satisfied: 1.25 < TD / f < 2.50. Therefore, it is advantageous to achieve a reasonable balance between the size and field of view of the optical lens assembly for photography. Furthermore, the following conditions can also be satisfied: 1.30 < TD / f < 2.30. Furthermore, the following conditions can also be satisfied: 1.40 < TD / f < 2.20. Furthermore, the following condition can also be satisfied: 1.48 ≤ TD / f ≤ 2.01.

[0031] If the radius of curvature of the object-side surface of the third lens element is R5 and the radius of curvature of the image-side surface of the third lens element is R6, the following condition can be satisfied: 0 ≤ |R5+R6| / |R5-R6| < 0.50. Therefore, it is advantageous to adjust the lens shape and refractive power of the third lens element to balance the beam path of the optical lens assembly for photography, thereby concentrating the focusing positions of light with different wavelengths. Furthermore, the following condition can also be satisfied: 0.03 < |R5+R6| / |R5-R6| < 0.40.

[0032] If the central thickness of the seventh lens element is CT7, the axial distance between the fifth and sixth lens elements is T56, and the axial distance between the sixth and seventh lens elements is T67, then the following condition can be satisfied: 0 < CT7 / (T56+T67) < 0.60. Therefore, it is advantageous to adapt the spatial arrangement at the image end of the optical lens assembly for photography, thereby providing a sufficient beam path for long focal lengths while simultaneously reducing assembly difficulty. Furthermore, the following condition can also be satisfied: 0.05 < CT7 / (T56+T67) < 0.50.

[0033] If the axial distance between the aperture diaphragm and the image surface is SL, and the axial distance between the object-side surface of the first lens element and the image surface is TL, the following condition can be met: 0.60 < SL / TL < 0.80. Therefore, it is advantageous to adjust the position of the aperture diaphragm to achieve a suitable balance between the field of view and the illuminance at the edge.

[0034] If the axial distance between the second and third lens elements is T23 and the central thickness of the second lens element is CT2, the following condition can be met: 0.50 < T23 / CT2 < 2.80. Therefore, it is advantageous to control the overall path length, thus reducing the assembly difficulty. Furthermore, the following conditions can also be met: 0.55 < T23 / CT2 < 2.60. Additionally, the following condition can also be met: 0.65 < T23 / CT2 < 1.70.

[0035] If the focal length of the optical lens assembly for photography is f and the focal length of the seventh lens element is f7, the following condition can be met: -2.00 < f / f7 < -0.65. Therefore, it is advantageous to adjust the refractive power of the seventh lens element, thereby reducing the rear focal length and aiding in the correction of aberrations in the central section. Furthermore, the following condition can also be met: -1.90 < f / f7 < -0.70.

[0036] If the central thickness of the fifth lens element is CT5 and the central thickness of the sixth lens element is CT6, the following condition can be met: 0.25 < CT6 / CT5 < 1.35. Therefore, it is advantageous to adjust the ratio of the central thickness of the fifth and sixth lens elements, thereby increasing the manufacturing yield. Furthermore, the following condition can also be met: 0.30 < CT6 / CT5 < 1.25.

[0037] If the central thickness of the negative lens element in the set of cemented lens elements is CTn and the central thickness of the second lens element is CT2, the following condition can be satisfied: 0.10 < CTn / CT2 < 0.55. Therefore, it is advantageous to adjust the ratio of the central thicknesses of the lens elements to compensate for the spatial arrangement at the object end of the optical lens assembly for photography. Furthermore, the following conditions can also be satisfied: 0.15 < CTn / CT2 < 0.50. Additionally, the following condition can also be satisfied: 0.20 < CTn / CT2 < 0.45.

[0038] If the Abbe number of the first lens element is V1 and the Abbe number of the second lens element is V2, the following condition can be satisfied: -31.5 < V2 - V1 < 18.0. Therefore, this is advantageous for effectively correcting the focusing positions of light with different wavelengths to prevent overlapping images. Furthermore, the following condition can also be satisfied: -30.5 < V2 - V1 < 17.5.

[0039] If a distance parallel to the optical axis exists between the position of the maximum effective radius of the object-side surface of the fifth lens element and the position of the maximum effective radius of the image-side surface of the fifth lens element (ET5), and a distance parallel to the optical axis exists between the position of the maximum effective radius of the object-side surface of the seventh lens element and the position of the maximum effective radius of the image-side surface of the seventh lens element (ET7), then the following condition can be satisfied: 0.40 < ET7 / ET5 < 2.20. Therefore, this is advantageous for harmonizing the propagation direction of peripheral light and for facilitating cooperation between the sections outside the effective radius of the lens elements and the mechanical component. Furthermore, the following condition can also be satisfied: 0.50 < ET7 / ET5 < 2.00. See [reference]. Fig.32, which shows a schematic view of ET5 and ET7 according to the 1st embodiment of the present disclosure.

[0040] If the maximum effective radius of the object-side surface of the first lens element is Y1R1 and the maximum image height of the optical lens assembly for photography (which can be half the diagonal length of an effective light-sensitive area of ​​the image sensor) is ImgH, the following condition can be satisfied: 1.00 < Y1R1 / ImgH < 2.10. Therefore, this is advantageous for effectively controlling the outer diameter and for helping the optical lens assembly for photography achieve a reasonable balance between the field of view and the size of the image surface. Furthermore, the following condition can also be satisfied: 1.10 < Y1R1 / ImgH < 2.00. See [reference]. Fig. 32, which shows a schematic representation of Y1R1 according to the 1st embodiment of the present disclosure.

[0041] If the maximum effective radius of the image-side surface of the fourth lens element is Y4R2, the maximum effective radius of the object-side surface of the fifth lens element is Y5R1, and the maximum effective radius of the image-side surface of the fifth lens element is Y5R2, the following condition can be satisfied: -1.00 < (Y5R1-Y5R2) / (Y5R1-Y4R2) < 1.00. Therefore, this is advantageous for correcting off-axis aberrations, reducing stray light, maintaining the field of view, and increasing illuminance at the edge. Furthermore, the following condition can also be satisfied: -0.80 < (Y5R1-Y5R2) / (Y5R1-Y4R2) < 0.80. Furthermore, the following condition can also be met: -0.70 < (Y5R1-Y5R2) / (Y5R1-Y4R2) < 0.60. See Fig. 32, which shows a schematic view of Y4R2, Y5R1 and Y5R2 according to the 1st embodiment of the present disclosure.

[0042] If the radius of curvature of the image-side surface of the third lens element is R6 and the radius of curvature of the object-side surface of the fourth lens element is R7, the following condition can be met: 0.60 < R6 / R7 < 1.30. Therefore, it is advantageous to match the lens shapes of the third and fourth lens elements during design in such a way as to correct aberrations. Furthermore, the following condition can also be met: 0.70 < R6 / R7 < 1.20.

[0043] If the central thickness of the first lens element is CT1 and the central thickness of the third lens element is CT3, the following condition can be met: 0 < CT3 / CT1 < 0.80. Therefore, it is advantageous to further control the central thickness of the first lens element by controlling that of the third lens element, thus ensuring the structural strength of the optical lens assembly for photography. Furthermore, the following condition can also be met: 0 < CT3 / CT1 < 0.70.

[0044] If the refractive index of the sixth lens element is N6, the following condition can be met: 1.690 ≤ N6. Therefore, selecting a material with a high refractive index for the sixth lens element is advantageous to balance the material configuration at the image end of the optical lens assembly for photography and thereby achieve good image quality. Furthermore, the following condition can also be met: 1.700 ≤ N6 ≤ 2.300.

[0045] If the focal length of the optical lens assembly for photography is f and the focal length of the fifth lens element is f5, the following condition can be met: 0.40 < f / f5 < 1.80. Therefore, it is advantageous to improve the light-focusing ability of the fifth lens element and thereby control the overall path length. Furthermore, the following condition can also be met: 0.50 < f / f5 < 1.70.

[0046] If the focal length of the third lens element is f3 and the focal length of the optical lens assembly for photography is f, the following condition can be satisfied: 0.10 < |f3 / f| < 1.10. Therefore, it is advantageous to obtain a relatively strong refractive power for the third lens element, thereby harmonizing the light path. Furthermore, the following condition can also be satisfied: 0.20 < |f3 / f| < 1.00.

[0047] If the radius of curvature of the object-side surface of the fourth lens element is R7 and the radius of curvature of the image-side surface of the fourth lens element is R8, the following condition can be met: -1.00 < (R7+R8) / (R7-R8) < 0.40. Therefore, it is advantageous to adjust the lens shape and refractive power of the fourth lens element to control the beam path, thereby improving the focusing quality in all fields of view. Furthermore, the following condition can also be met: -0.80 < (R7+R8) / (R7-R8) < 0.30.

[0048] If a displacement parallel to the optical axis from an axial vertex on the object-side surface of the seventh lens element to a position of maximum effective radius on the object-side surface of the seventh lens element is SAG7R1, and the central thickness of the seventh lens element is CT7, the following condition can be met: -2.80 < SAG7R1 / CT7 < -0.10. Therefore, it is advantageous to aid in adapting to the peripheral beam path, to achieve the effects of reducing field curvature and back focal length, and thereby improving focusing quality in the peripheral field of view. Furthermore, the following condition can also be met: -2.50 < SAG7R1 / CT7 < -0.30. See [reference]. Fig.Figure 32 shows a schematic view of SAG7R1 according to the first embodiment of the present disclosure. If the direction from the axial vertex of a surface to the position of the maximum effective radius of the same surface is directed towards the image side of the optical lens assembly for photography, the value of the displacement is positive; if the direction from the axial vertex of the surface to the position of the maximum effective radius of the same surface is directed towards the object side of the optical lens assembly for photography, the value of the displacement is negative.

[0049] If the central thickness of the first lens element is CT1, the central thickness of the second lens element is CT2, and there is a distance parallel to the optical axis between a position of the maximum effective radius of the object-side surface of the first lens element and a position of the maximum effective radius of the image-side surface of the first lens element ET1, and a distance parallel to the optical axis between a position of the maximum effective radius of the object-side surface of the second lens element and a position of the maximum effective radius of the image-side surface of the second lens element ET2, then the following condition can be satisfied: 1.50 < CT1 / ET1+ET2 / CT2 < 4.00. Therefore, it is advantageous to control the thickness ratio of the center and edge of the lens elements, thereby ensuring manufacturability while simultaneously reducing the size of the optical lens assembly for photography at its object end.Furthermore, the following condition can also be met: 1.70 < CT1 / ET1+ET2 / CT2 < 3.80. See . Fig. 32, which shows a schematic view of ET1 and ET2 according to the 1st embodiment of the present disclosure.

[0050] According to the present disclosure, the above-mentioned features and conditions can be used in numerous combinations to achieve corresponding effects.

[0051] According to the present disclosure, the lens elements of the optical lens assembly for photography can be made of either glass or plastic. If the lens elements are made of glass, the refractive power distribution of the optical lens assembly for photography can be more flexible, and the influence on the imaging caused by changes in ambient temperature can be reduced. The glass lens element can be manufactured either by grinding or forming. If the lens elements are made of plastic, the manufacturing costs can be effectively reduced. Furthermore, the surfaces of each lens element can be designed to be spherical or aspherical. Spherical lens elements are easy to manufacture.The design of aspherical lens elements allows for more control variables to eliminate aberrations and reduce the required number of lens elements, effectively shortening the overall path length of the optical lens assembly for photography. Additionally, the aspherical surfaces can be manufactured by plastic injection molding or glass forming.

[0052] According to the present disclosure, a lens surface is aspherical if it has an aspherical shape over its entire optically effective area or part thereof.

[0053] According to the present disclosure, the material of one or more lens elements can optionally contain an additive that produces light absorption and interference effects and modifies the transmittance of the lens elements in a specific wavelength range to reduce unwanted scattered light or color deviations. For example, the additive can optionally filter out light in the wavelength range of 600 nm to 800 nm to reduce excessive red light and / or near-infrared light; or it can optionally filter out light in the wavelength range of 350 nm to 450 nm to prevent excessive blue light and / or near-ultraviolet light from interfering with the final image. The additive can be homogeneously mixed with a plastic material to be used for the production of a lens element from the mixed material by injection molding.Furthermore, the additive can be applied to the lens surface to achieve the effects mentioned above.

[0054] According to the present disclosure, both the object-side surface and the image-side surface have a paraxial region and an off-axis region. The paraxial region refers to the region of the surface where light rays travel close to the optical axis, and the off-axis region refers to the region of the surface that is farther from the paraxial region. In particular, unless otherwise specified, if the lens element has a convex surface, the surface in its paraxial region is convex, and if the lens element has a concave surface, the surface in its paraxial region is concave. If a portion of the refractive power, radius of curvature, or focal point of a lens element is not defined, this means that the portion of the refractive power, radius of curvature, or focal point of the lens element lies within its paraxial region.

[0055] According to the present disclosure, the image surface of the optical lens assembly for photography, based on the corresponding image sensor, can be flat or curved, in particular a curved surface that is concave and faces the object side of the optical lens assembly for photography.

[0056] According to the present disclosure, an image correction unit, for example, a field flattener, can optionally be arranged between the lens element located closest to the image side along the beam path of the optical lens assembly for photography and the image surface to correct aberrations such as field curvature. The optical properties of the image correction unit, such as curvature, thickness, refractive index, position, and surface shape (convex or concave surface of spherical, aspherical, diffractive, or Fresnel type), can be adapted according to the design of the image acquisition unit. In general, a preferred image correction unit is, for example, a thin transparent element with a concave object-side surface and a planar image-side surface, wherein the thin transparent element is arranged near the image surface.

[0057] According to the present disclosure, at least one light deflection element, such as a prism or a mirror, which may be planar, spherical, aspherical, or freeform, can optionally be arranged between an imaged object and the image surface on the optical beam path, so that the optical lens assembly for photography can be more flexible in its spatial arrangement and therefore the dimensions of an electronic device are not limited by the total path length of the optical lens assembly for photography. See in particular Fig. 33. Fig. Figure 33 shows a schematic view of a configuration of a light deflection element in an optical lens assembly for photography according to an embodiment of the present disclosure. Fig.33 The optical lens assembly for photography can have, in sequence from an imaged object (not shown in the figures) to an image surface IMG along a beam path, a first optical axis OA1, a light deflecting element LF and a second optical axis OA2. The light deflecting element LF can be arranged between the imaged object and a lens group LG of the optical lens assembly for photography, as in Fig. Figure 33 shows that the optical lens assembly for photography can optionally be provided with two or more light deflection elements, and the present disclosure is not limited to the type, number and position of the light deflection elements of the embodiments disclosed in the aforementioned figures.

[0058] According to the present disclosure, the optical lens assembly for photography can comprise at least one aperture, for example an aperture diaphragm, a glare diaphragm, or a field diaphragm. The glare diaphragm or field diaphragm is adjusted to eliminate stray light and thereby improve image quality.

[0059] According to the present disclosure, the optical lens assembly for photography can include an aperture control unit. The aperture control unit can be a mechanical component or a light modulator that can control the size and shape of the aperture by means of electricity or electrical signals. The mechanical component can include a movable element, such as a blade arrangement or a light-shielding film. The light modulator can include a shielding element, such as a filter, an electrochromic material, or a liquid crystal layer. The aperture control unit controls the amount of incident light or the exposure time to improve the ability to adjust image quality. Furthermore, the aperture control unit can be the aperture diaphragm of the present disclosure, which changes the f-number to achieve various image effects, such as depth of field or lens speed.

[0060] According to the present disclosure, the optical lens assembly for photography can comprise one or more optical elements for limiting the shape of the light passing through the optical lens assembly for photography. Each optical element can be, but is not limited to, a filter, a polarizer, etc., and each optical element can be, but is not limited to, a single element, a composite component, a thin layer, etc. The optical element can be arranged on the object side or the image side of the optical lens assembly for photography, or between two adjacent lens elements, to transmit light in a specific shape and thus meet the application requirements.

[0061] According to the present disclosure, the optical lens assembly for photography can comprise at least one optical lens element, an optical element, or a support having at least one surface with a low-reflection layer. The low-reflection layer can effectively reduce stray light caused by light reflection at the interface. The low-reflection layer can be arranged in an optically ineffective region of an object-side surface, an image-side surface of the optical lens element, or a connecting surface between the object-side surface and the image-side surface. The optical element can be a light-blocking element, an annular spacer, a tube element, a cover glass, a blue glass, a filter, a color filter, a beam deflection element, a prism, a mirror, etc.The support can be a base for holding a lens assembly, a microlens arranged on an image sensor, a substrate surrounding the image sensor, a glass plate to protect the image sensor, etc.

[0062] According to the present disclosure, the optical lens assembly for photography can further comprise a light-blocking element. The light-blocking element can have a non-circular aperture, and the non-circular aperture can have different effective radii in different directions perpendicular to the optical axis. Therefore, it is advantageous to coordinate the shape with non-circular lens elements or aperture diaphragms to save space and to fully utilize the light passing through the non-circular lens elements or aperture diaphragms, thereby reducing stray light. In addition, the light-blocking element can be provided with a wavy or serrated structure at its edge.

[0063] According to the present disclosure, an object side and an image side are defined according to the direction of the optical axis, and the axial optical data are calculated along the optical axis. Furthermore, if the optical axis is deflected by a light deflection element, the axial optical data are also calculated along the deflected optical axis.

[0064] According to the present disclosure, the focal length of a lens element is calculated under the assumption that the medium both in front of and behind the lens element is air.

[0065] According to the above description of the present disclosure, the following specific embodiments are also provided. 1. Design

[0066] Fig. Figure 1 is a schematic view of an image acquisition unit according to the first embodiment of the present disclosure. Fig.Figure 2 shows, in order from left to right, spherical aberration curves, astigmatic field curves, and a distortion curve of the image acquisition unit according to the first embodiment. Fig. 1 The image acquisition unit 1 comprises the optical lens assembly for photography (whose reference numeral is omitted) of the present disclosure and an image sensor IS. The optical lens assembly for photography comprises, in order from an object side to an image side along an optical axis, a first lens element E1, a second lens element E2, an aperture diaphragm ST, a third lens element E3, a fourth lens element E4, a fifth lens element E5, a sixth lens element E6, a seventh lens element E7, a filter E8, and an image surface IMG. The optical lens assembly for photography comprises seven lens elements (E1, E2, E3, E4, E5, E6, and E7), with no additional lens element arranged between any of the adjacent seven lens elements.

[0067] The first lens element E1 with positive refractive power has an object-side surface that is convex in a paraxial region and an image-side surface that is concave in a paraxial region. The first lens element E1 is made of glass and both its object-side and image-side surfaces are spherical.

[0068] The second lens element E2, with negative refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is concave in a paraxial region. The second lens element E2 is made of glass and both its object-side and image-side surfaces are aspherical.

[0069] The third lens element E3, with negative refractive power, has an object-side surface that is concave in a paraxial region, and an image-side surface that is also concave in a paraxial region. The third lens element E3 is made of glass and both its object-side and image-side surfaces are spherical.

[0070] The fourth lens element E4, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is also convex in a paraxial region. The fourth lens element E4 is made of glass and both its object-side and image-side surfaces are spherical. The object-side surface of the fourth lens element E4 is cemented to the image-side surface of the third lens element E3. The third lens element E3 and the fourth lens element E4 form a cemented lens element set.

[0071] The fifth lens element E5, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is also convex in a paraxial region. The fifth lens element E5 is made of glass and both its object-side and image-side surfaces are spherical.

[0072] The sixth lens element E6, with positive refractive power, has an object-side surface that is concave in a paraxial region and an image-side surface that is convex in a paraxial region. The sixth lens element E6 is made of glass and both its object-side and image-side surfaces are spherical.

[0073] The seventh lens element E7, with negative refractive power, has an object-side surface that is concave in a paraxial region and an image-side surface that is convex in a paraxial region. The seventh lens element E7 is made of glass and both its object-side and image-side surfaces are spherical.

[0074] The E8 filter is made of glass and is located between the seventh lens element E7 and the image surface IMG, without affecting the focal length of the optical lens assembly used for photography. The IS image sensor is located on or near the image surface IMG of the optical lens assembly used for photography.

[0075] The equation for the aspherical surface profiles of the above-mentioned lens elements of the first embodiment is as follows: X(Y)=(Y2 / R) / (1+sqrt(1−(1+k)×(Y / R)2))+∑i(Ai)×(Yi) where X is the displacement parallel to the optical axis from an axial vertex on the aspherical surface to a point at a distance Y from the optical axis on the aspherical surface; Y is the vertical distance from the point on the aspherical surface to the optical axis; R is the radius of curvature; k is the conic coefficient; and Ai is the i-th aspherical coefficient, where i can be 4, 6, 8, 10 and 12 in embodiments, but is not limited to these.

[0076] In the optical lens assembly for photography of the image acquisition unit 1 according to the first embodiment, where a focal length of the optical lens assembly for photography is f, an aperture number of the optical lens assembly for photography is Fno, half of a maximum field of view of the optical lens assembly for photography is HFOV, and the maximum field of view of the optical lens assembly for photography is FOV, these parameters have the following values: f = 12.99 millimeters (mm), Fno = 1.71, HFOV = 20.0 degrees (degrees), and FOV = 40.0 degrees.

[0077] If the axial distance between the aperture diaphragm ST and the image surface IMG SL is and the axial distance between the object-side surface of the first lens element E1 and the image surface IMG TL is, then the following condition is met: SL / TL = 0.71.

[0078] If the axial distance between the object-side surface of the first lens element E1 and the image-side surface of the seventh lens element E7 is TD and the focal length of the optical lens assembly for photography is f, then the following condition is met: TD / f = 2.00.

[0079] If the focal length of the optical lens assembly for photography is f and the focal length of the third lens element E3 is f3, then the following condition is met: |f3 / f| = 0.62.

[0080] If the focal length of the optical lens assembly for photography is f and the focal length of the fifth lens element E5 is f5, then the following condition is met: f / f5 = 1.05.

[0081] If the focal length of the optical lens assembly for photography is f and the focal length of the seventh lens element E7 is f7, then the following condition is met: f / f7 = -1.34.

[0082] If the focal length of the third lens element E3 is f3 and the combined focal length of the first lens element E1 and the second lens element E2 is f12, then the following condition is satisfied: |f3 / f12| = 0.02.

[0083] If the radius of curvature of the image-side surface of the second lens element E2 is R4 and the focal length of the optical lens assembly for photography is f, then the following condition is met: R4 / f = 0.83.

[0084] If the radius of curvature of the image-side surface of the third lens element E3 is R6 and the radius of curvature of the object-side surface of the fourth lens element E4 is R7, then the following condition is met: R6 / R7 = 1.00.

[0085] If the radius of curvature of the object-side surface of the third lens element E3 is R5 and the radius of curvature of the image-side surface of the third lens element E3 is R6, then the following condition is satisfied: |R5+R6| / |R5-R6| = 0.18.

[0086] If the radius of curvature of the object-side surface of the fourth lens element E4 is R7 and the radius of curvature of the image-side surface of the fourth lens element E4 is R8, then the following condition is satisfied: (R7+R8) / (R7-R8) = 0.18.

[0087] If the radius of curvature of the image-side surface of the sixth lens element E6 is R12 and the radius of curvature of the object-side surface of the seventh lens element E7 is R13, then the following condition is met: R13 / |R12| = -0.32.

[0088] If the focal length of the optical lens assembly for photography is f and a central thickness of the first lens element E1 is CT1, the following condition is met: f / CT1=5.22.

[0089] If the central thickness of the first lens element E1 is CT1 and the central thickness of the third lens element E3 is CT3, then the following condition is met: CT3 / CT1 = 0.29.

[0090] If the axial distance between the second lens element E2 and the third lens element E3 is T23 and the central thickness of the second lens element E2 is CT2, then the following condition is met: T23 / CT2 = 0.89. In this embodiment, an axial distance between two adjacent lens elements is a distance in a paraxial region between two adjacent lens surfaces of the two adjacent lens elements.

[0091] If the central thickness of the negative lens element among the cemented lens elements is CTn, and the central thickness of the second lens element E2 is CT2, then the following condition is met: CTn / CT2 = 0.41. In this embodiment, the third lens element E3 and the fourth lens element E4 are cemented together, and the third lens element E3 is a negative lens element. Therefore, CTn is the central thickness of the third lens element E3.

[0092] If the central thickness of the second lens element E2 is CT2 and the central thickness of the seventh lens element E7 is CT7, then the following condition is met: CT7 / CT2 = 0.43.

[0093] If the central thickness of the fifth lens element is E5 CT5 and the central thickness of the sixth lens element is E6 CT6, then the following condition is met: CT6 / CT5=0.82.

[0094] If the central thickness of the seventh lens element E7 is CT7, the axial distance between the fifth lens element E5 and the sixth lens element E6 is T56, and the axial distance between the sixth lens element E6 and the seventh lens element E7 is T67, then the following condition is met: CT7 / (T56+T67) = 0.17.

[0095] If the refractive index of the sixth lens element E6 is N6, then the following condition is met: N6 = 2.000.

[0096] If the Abbe number of the first lens element E1 is V1 and the Abbe number of the second lens element E2 is V2, then the following condition is satisfied: V2-V1 = 4.5.

[0097] If a displacement parallel to the optical axis from an axial vertex on the object-side surface of the seventh lens element E7 to a position of maximum effective radius on the object-side surface of the seventh lens element E7 is SAG7R1, and the central thickness of the seventh lens element E7 is CT7, then the following condition is met: SAG7R1 / CT7 = -1.62. In this embodiment, the direction of SAG7R1 towards the object side of the optical lens assembly is oriented towards photography, so the value of SAG7R1 is negative.

[0098] If the central thickness of the first lens element E1 is CT1, the central thickness of the second lens element E2 is CT2, a distance parallel to the optical axis between a position of the maximum effective radius of the object-side surface of the first lens element E1 and a position of the maximum effective radius of the image-side surface of the first lens element E1 is ET1, and a distance parallel to the optical axis between a position of the maximum effective radius of the object-side surface of the second lens element E2 and a position of the maximum effective radius of the image-side surface of the second lens element E2 is ET2, then the following condition is satisfied: CT1 / ET1+ET2 / CT2 = 2.36.

[0099] If a distance parallel to the optical axis between a position of the maximum effective radius of the object-side surface of the fifth lens element E5 and a position of the maximum effective radius of the image-side surface of the fifth lens element E5 is ET5, and a distance parallel to the optical axis between a position of the maximum effective radius of the object-side surface of the seventh lens element E7 and a position of the maximum effective radius of the image-side surface of the seventh lens element E7 is ET7, then the following condition is satisfied: ET7 / ET5 = 1.03.

[0100] If the maximum effective radius of the object-side surface of the first lens element is E1 Y1R1 and the maximum image height of the optical lens assembly for photography is ImgH, then the following condition is met: Y1R1 / ImgH = 1.42.

[0101] If the maximum effective radius of the image-side surface of the fourth lens element is E4 Y4R2, the maximum effective radius of the object-side surface of the fifth lens element is E5 Y5R1, and the maximum effective radius of the image-side surface of the fifth lens element is E5 Y5R2, then the following condition is satisfied: (Y5R1-Y5R2) / (Y5R1-Y4R2) = 0.19.

[0102] The detailed optical data of the first embodiment are listed in Table 1A and the aspherical surface data in Table 1B below. TABLE 1A 1. Design f = 12.99 mm, Fno = 1.71, HFOV = 20.0 degrees Surface# radius of curvature thickness material index Abbe# Focal length 0 object infinity infinity 1 Lens 1 43,6006 (SPH) 2,486 Glass 1,835 42,7 55,43 2 735,2941 (SPH) 3,675 3 Lens 2 17,6926 (ASP) 1,752 Glass 1,541 47,2 -55,65 4 10,7541 (ASP) 0,668 5 Ape, -panel Plano 0,890 6 Lens 3 -8,6887 (SPH) 0,722 Glass 1,625 35,6 -8,07 7 12,4227 (SPH) 0,005 Sealed 1,550 43,9 - 8 Lens 4 12,4227 (SPH) 3,294 Glass 1,603 60,6 8,97 9 -8,6328 (SPH) 0,079 10 Lens 5 10,4583 (SPH) 3,928 Glass 1,729 54,7 12,42 11 -56,7457 (SPH) 3,367 12 Lens 6 246,6642 (SPH) 3,226 Glass 2,000 20,7 25,54 13 -23,2891 (SPH) 1,142 14 Lens 7 -7,4559 (SPH) 0,756 Glass 1,923 18,9 -9,71 15 -46,5486 (SPH) 0,700 16 filter Plano 1,100 Glass 1,517 64,2 - 17 Plano 1,513 18 Picture Plano - Note: Reference wavelength is 587.6 nm (d-line). TABLE 1B Aspheric coefficients Surface # 3 4 k = -2,80433E+01 -1,30575E+00 A4 = -5,6789E-05 -3,8862E-04 A6 = -2,7992E-05 -2,0211E-05 A8 = 5,4553E-07 2,8283E-06 A10 = 3,0286E-09 -2,1976E-07 A12 = -3,3611E-10 7,5504E-09

[0103] Table 1A lists the radius of curvature, thickness, and focal length in millimeters (mm). Surface numbers 0–18 represent the surfaces arranged sequentially along the optical axis from the object-side surface to the image-side surface. In Table 1B, k represents the conic coefficient of the aspherical surface profile equation. A4–A12 represent the 4th to 12th order aspherical coefficients. The tables shown below for each embodiment contain the corresponding schematic parameters and aberration curves, and the definitions in the tables are the same as in Table 1A and Table 1B of the first embodiment. Therefore, no further explanation is given in this regard. 2. Design

[0104] Fig. Figure 3 is a schematic view of an image acquisition unit according to the second embodiment of the present disclosure. Fig.Figure 4 shows, in order from left to right, spherical aberration curves, astigmatic field curves, and a distortion curve of the image acquisition unit according to the second embodiment. Fig.3 The image acquisition unit 2 comprises the optical lens assembly for photography (whose reference numeral is omitted) of the present disclosure and an image sensor IS. The optical lens assembly for photography comprises, in order from an object side to an image side along an optical axis, a first lens element E1, a second lens element E2, an aperture diaphragm ST, a third lens element E3, a fourth lens element E4, an aperture S1, a fifth lens element E5, a sixth lens element E6, a seventh lens element E7, a filter E8, and an image surface IMG. The optical lens assembly for photography comprises seven lens elements (E1, E2, E3, E4, E5, E6, and E7), with no additional lens element arranged between each of the seven adjacent lens elements.

[0105] The first lens element E1 with positive refractive power has an object-side surface that is convex in a paraxial region and an image-side surface that is concave in a paraxial region. The first lens element E1 is made of glass and both its object-side and image-side surfaces are spherical.

[0106] The second lens element E2, with negative refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is concave in a paraxial region. The second lens element E2 is made of glass and both its object-side and image-side surfaces are aspherical.

[0107] The third lens element E3, with negative refractive power, has an object-side surface that is concave in a paraxial region, and an image-side surface that is also concave in a paraxial region. The third lens element E3 is made of glass and both its object-side and image-side surfaces are spherical.

[0108] The fourth lens element E4, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is also convex in a paraxial region. The fourth lens element E4 is made of glass and both its object-side and image-side surfaces are spherical. The object-side surface of the fourth lens element E4 is cemented to the image-side surface of the third lens element E3. The third lens element E3 and the fourth lens element E4 form a cemented lens element set.

[0109] The fifth lens element E5, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is also convex in a paraxial region. The fifth lens element E5 is made of glass and both its object-side and image-side surfaces are spherical.

[0110] The sixth lens element E6, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is concave in a paraxial region. The sixth lens element E6 is made of glass and both its object-side and image-side surfaces are spherical.

[0111] The seventh lens element E7, with negative refractive power, has an object-side surface that is concave in a paraxial region and an image-side surface that is planar in a paraxial region. The seventh lens element E7 is made of glass and both its object-side and image-side surfaces are spherical.

[0112] The E8 filter is made of glass and is located between the seventh lens element E7 and the image surface IMG. It does not affect the focal length of the optical lens assembly used for photography. The IS image sensor is located on or near the image surface IMG of the optical lens assembly used for photography.

[0113] The detailed optical data of the 2nd embodiment are listed in Table 2A and the aspherical surface data are listed in Table 2B below. TABLE 2A 2. Design f = 15.28 mm, Fno = 1.65, HFOV = 17.2 degrees Surface # radius of curvature thickness material index Abbe # Focal length 0 object infinity infinity 1 Lens 1 18,0000 (SPH) 2,982 Glass 1,804 46,6 29,39 2 70,0000 (SPH) 0,700 3 Lens 2 11,3925 (ASP) 2,398 Glass 1,589 61,2 -39,56 4 7,0551 (ASP) 1,289 5 Ape, -panel Plano 1,027 6 Lens 3 -10,2187 (SPH) 0,800 Glass 1,648 33,9 -6,80 7 7,9836 (SPH) 0,005 Sealed 1,550 43,9 - 8 Lens 4 7,9836 (SPH) 3,914 Glass 1,692 54,5 8,07 9 -14,8451 (SPH) 1,032 10 Aperture Plano -0,932 11 Lens 5 12,0759 (SPH) 4,173 Glass 1,593 68,3 14,95 12 -29,0000 (SPH) 3,911 13 Lens 6 20,7561 (SPH) 2,391 Glass 1,835 42,7 33,07 14 79,2740 (SPH) 1,560 15 Lens 7 -8,6942 (SPH) 1,550 Glass 1,603 38,0 -14,41 16 Plano (SPH) 1,000 17 filter Plano 0,300 Glass 1,517 64,2 - 18 Plano 0,903 19 Picture Plano - Note: Reference wavelength is 587.6 nm (d-line). An effective radius of aperture S1 (surface 10) is 4,750 mm. TABLE 2B Aspheric coefficients Surface # 3 4 k = 9,07737E-01 -5,35095E+00 A4 = -2,5341E-04 1,6924E-03 A6 = -4,4851E-07 -6,6185E-05 A8 = -3,1782E-08 3,8083E-06 A10 = -1,8696E-09 -1,6361 E-07 A12 = 5,3161E-11 3,5574E-09

[0114] In the second embodiment, the equation for the aspherical surface profiles of the aforementioned lens elements is the same as the equation for the first embodiment. The definitions of the parameters listed in Table 2C are also the same as those for the first embodiment, with corresponding values ​​for the second embodiment, so no further explanation is given.

[0115] Furthermore, these parameters from Table 2A and Table 2B can be calculated as the following values ​​and satisfy the following conditions: TABLE 2C Schematic parameters f [mm] 15,28 f / CT1 5,12 Fno 1,65 CT3 / CT1 0,27 HFOV [Grade] 17,2 T23 / CT2 0,97 FOV [degrees] 34,4 CTn / CT2 0,33 SL / TL 0,75 CT7 / CT2 0,65 TD / f 1,75 CT6 / CT5 0,57 |f3 / f| 0,44 CT7 / (T56+T67) 0,28 f / f5 1,02 N6 1,835 f / f7 -1,06 V2-V1 14,6 |f3 / f12| 0,11 SAG7R1 / CT7 -0,68 R4 / f 0,46 CT1 / ET1+ET2 / CT2 2,47 R6 / R7 1,00 ET7 / ET5 0,93 |R5+R6| / |R5-R6| 0,12 Y1R1 / lmgH 1,39 (R7+R8) / (R7-R8) -0,30 (Y5R1-Y5R2) / (Y5R1-Y4R2) -0,26 R13 / |R12| -0,11 - - 3. Design

[0116] Fig. Figure 5 is a schematic view of an image acquisition unit according to the 3rd embodiment of the present disclosure. Fig. Figure 6 shows, in order from left to right, spherical aberration curves, astigmatic field curves, and a distortion curve of the image acquisition unit according to the third embodiment. Fig.5 comprises the image acquisition unit 3, the optical lens assembly for photography (whose reference numeral is omitted) of the present disclosure, and an image sensor IS. The optical lens assembly for photography comprises, in order from an object side to an image side along an optical axis, a first lens element E1, a second lens element E2, an aperture diaphragm ST, a third lens element E3, a fourth lens element E4, a fifth lens element E5, a sixth lens element E6, a seventh lens element E7, a filter E8, and an image surface IMG. The optical lens assembly for photography comprises seven lens elements (E1, E2, E3, E4, E5, E6, and E7), with no additional lens element arranged between any of the adjacent seven lens elements.

[0117] The first lens element E1 with positive refractive power has an object-side surface that is convex in a paraxial region and an image-side surface that is also convex in a paraxial region. The first lens element E1 is made of glass and both its object-side and image-side surfaces are spherical.

[0118] The second lens element E2, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is concave in a paraxial region. The second lens element E2 is made of glass and both its object-side and image-side surfaces are aspherical.

[0119] The third lens element E3, with negative refractive power, has an object-side surface that is concave in a paraxial region, and an image-side surface that is also concave in a paraxial region. The third lens element E3 is made of glass and both its object-side and image-side surfaces are spherical.

[0120] The fourth lens element E4, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is also convex in a paraxial region. The fourth lens element E4 is made of glass and both its object-side and image-side surfaces are spherical. The object-side surface of the fourth lens element E4 is cemented to the image-side surface of the third lens element E3. The third lens element E3 and the fourth lens element E4 form a cemented lens element set.

[0121] The fifth lens element E5, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is also convex in a paraxial region. The fifth lens element E5 is made of glass and both its object-side and image-side surfaces are spherical.

[0122] The sixth lens element E6, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is concave in a paraxial region. The sixth lens element E6 is made of glass and both its object-side and image-side surfaces are spherical.

[0123] The seventh lens element E7, with negative refractive power, has an object-side surface that is concave in a paraxial region, and an image-side surface that is also concave in a paraxial region. The seventh lens element E7 is made of plastic material and both its object-side and image-side surfaces are aspherical.

[0124] The E8 filter is made of glass and is located between the seventh lens element E7 and the image surface IMG. It does not affect the focal length of the optical lens assembly used for photography. The IS image sensor is located on or near the image surface IMG of the optical lens assembly used for photography.

[0125] The detailed optical data of the 3rd embodiment are shown in Table 3A and the aspherical surface data are shown in Table 3B below. TABLE 3A 3. Design f = 13.41 mm, Fno = 1.68, HFOV = 19.0 degrees Surface# radius of curvature thickness material index Abbe# Focal length 0 object infinity infinity 1 Lens 1 41,5875 (SPH) 2,744 Glass 1,689 31,2 50.55 2 208,3333 (SPH) 0,100 3 Lens 2 8,5371 (ASP) 2,126 Glass 1,855 36,6 288.49 4 7,8277 (ASP) 3,492 5 Ape, -panel Plano 0,593 6 Lens 3 -12,1846 (SPH) 0,787 Glass 1,699 30,0 -6.25 7 6,9917 (SPH) 0,005 Sealed 1,550 43,9 - 8 Lens 4 6,9917 (SPH) 4,370 Glass 1,729 54,7 8.08 9 -27,5667 (SPH) 0,876 10 Lens 5 13,3183 (SPH) 4,380 Glass 1,729 54,7 11.98 11 -21,8849 (SPH) 0,826 12 Lens 6 17,3894 (SPH) 3,502 Glass 1,734 51,5 46.67 13 32,3047 (SPH) 2,314 14 Lens 7 -15,5070 (ASP) 0,688 plastic 1,511 56,8 -14.43 15 14,2625 (ASP) 0,760 16 filter Plano 1,000 Glass 1,517 64,2 - 17 Plano 0,679 18 Picture Plano - Note: Reference wavelength is 587.6 nm (d-line). TABLE 3B Aspheric coefficients Surface # 3 4 14 15 k = 7,08429E-01 -1,92110E+00 8,69291E+00 -1,12674E+01 A4 = -1,7915E-04 4,7978E-04 -6,6152E-03 -5,5938E-03 A6 = 4,6805E-05 1,6434E-04 6,0327E-04 5,2282E-04 A8 = -3,8302E-06 -2,0196E-05 -3,7805E-05 -3,1330E-05 A10 = 1,4654E-07 1,2522E-06 1,3910E-06 1,0508E-06 A12 = -2,0186E-09 -2,6869E-08 -2,0894E-08 -1,4993E-08

[0126] In the third embodiment, the equation for the aspherical surface profiles of the aforementioned lens elements is the same as the equation for the first embodiment. The definitions of the parameters listed in Table 3C are also the same as those for the first embodiment, with corresponding values ​​for the third embodiment, so no further explanation is given here.

[0127] Furthermore, these parameters from Table 3A and Table 3B can be calculated as the following values ​​and satisfy the following conditions: TABLE 3C Schematic parameters f [mm] 13,41 f / CT1 4,89 Fno 1,68 CT3 / CT1 0,29 HFOV [Grade] 19,0 T23 / CT2 1,92 FOV [degrees] 38,0 CTn / CT2 0,37 SL / TL 0,71 CT7 / CT2 0,32 TD / f 2,00 CT6 / CT5 0,80 |f3 / f| 0,47 CT7 / (T56+T67) 0,22 f / f5 1,12 N6 1,734 f / f7 -0,93 V2-V1 5,4 |f3 / f12| 0,16 SAG7R1 / CT7 -2,06 R4 / f 0,58 CT1 / ET1+ET2 / CT2 2,04 R6 / R7 1,00 ET7 / ET5 0,87 |R5+R6| / |R5-R6| 0,27 Y1R1 / lmgH 1,58 (R7+R8) / (R7-R8) -0,60 (Y5R1-Y5R2) / (Y5R1-Y4R2) 0,01 R13 / |R12| -0,48 - - 4. Design

[0128] Fig. Figure 7 is a schematic view of an image acquisition unit according to the 4th embodiment of the present disclosure. Fig. Figure 8 shows, in order from left to right, spherical aberration curves, astigmatic field curves, and a distortion curve of the image acquisition unit according to the 4th embodiment. Fig.7 comprises the image acquisition unit 4, the optical lens assembly for photography (whose reference numeral is omitted) of the present disclosure, and an image sensor IS. The optical lens assembly for photography comprises, in order from an object side to an image side along an optical axis, a first lens element E1, a second lens element E2, an aperture diaphragm ST, a third lens element E3, a fourth lens element E4, a fifth lens element E5, a sixth lens element E6, a seventh lens element E7, a filter E8, and an image surface IMG. The optical lens assembly for photography comprises seven lens elements (E1, E2, E3, E4, E5, E6, and E7), with no additional lens element arranged between any of the seven adjacent lens elements.

[0129] The first lens element E1 with positive refractive power has an object-side surface that is convex in a paraxial region and an image-side surface that is also convex in a paraxial region. The first lens element E1 is made of glass and both its object-side and image-side surfaces are spherical.

[0130] The second lens element E2, with negative refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is concave in a paraxial region. The second lens element E2 is made of glass and both its object-side and image-side surfaces are aspherical.

[0131] The third lens element E3, with negative refractive power, has an object-side surface that is concave in a paraxial region, and an image-side surface that is also concave in a paraxial region. The third lens element E3 is made of glass and both its object-side and image-side surfaces are spherical.

[0132] The fourth lens element E4, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is also convex in a paraxial region. The fourth lens element E4 is made of glass and both its object-side and image-side surfaces are spherical. The object-side surface of the fourth lens element E4 is cemented to the image-side surface of the third lens element E3. The third lens element E3 and the fourth lens element E4 form a cemented lens element set.

[0133] The fifth lens element E5, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is concave in a paraxial region. The fifth lens element E5 is made of glass and both its object-side and image-side surfaces are spherical.

[0134] The sixth lens element E6, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is also convex in a paraxial region. The sixth lens element E6 is made of glass and both its object-side and image-side surfaces are spherical.

[0135] The seventh lens element E7, with negative refractive power, has an object-side surface that is concave in a paraxial region and an image-side surface that is convex in a paraxial region. The seventh lens element E7 is made of glass and both its object-side and image-side surfaces are aspherical.

[0136] The E8 filter is made of glass and is positioned between the seventh lens element E7 and the image surface IMG of the optical lens assembly used for photography. It does not affect the focal length of the optical lens assembly used for photography. The IS image sensor is positioned on or near the image surface IMG of the optical lens assembly used for photography.

[0137] The detailed optical data of the 4th embodiment are shown in Table 4A and the aspherical surface data are shown in Table 4B below. TABLE 4A 4. Design f = 11.36 mm, Fno = 1.84, HFOV = 23.6 degrees, Surface # radius of curvature thickness material index Abbe # Focal length 0 object infinity infinity 1 Lens 1 40,4342 (SPH) 2,944 Glass 1,729 54,7 33.95 2 -61,8604 (SPH) 3,068 3 Lens 2 12,6404 (ASP) 1,668 Glass 1,613 37,0 -24.34 4 6,4990 (ASP) 0,675 5 Ape, -panel Plano 0,672 6 Lens 3 -7,3485 (SPH) 0,463 Glass 1,596 39,2 -6.46 7 8,2686 (SPH) 0,003 Sealed 1,550 43,9 - 8 Lens 4 8,2686 (SPH) 2,897 Glass 1,678 55,5 6.37 9 -7,7503 (SPH) 0,473 10 Lens 5 7,0097 (SPH) 4,044 Glass 1,487 70,4 18.71 11 24,5541 (SPH) 0,451 12 Lens 6 13,7477 (SPH) 2,826 Glass 1,729 54,7 15.25 13 -53,1642 (SPH) 1,994 14 Lens 7 -6,0770 (ASP) 0,692 Glass 1,728 28,3 -11.03 15 -26,1597 (ASP) 0,600 16 filter Plano 1,100 Glass 1,517 64,2 - 17 Plano 1,309 18 Picture Plano - Note: Reference wavelength is 587.6 nm (d-line). TABLE 4B Aspheric coefficients Surface # 3 4 14 15 k = -8,75886E+01 -2,20056E+00 3,61842E-02 -9,86324E+00 A4 = 3,2061E-03 -1,0237E-03 -9,9314E-05 1,1214E-04 A6 = -7,5921E-04 2,2086E-04 -1,1467E-04 -9,3258E-05 A8 = 8,5327E-05 -7,6881E-05 1,8915E-05 1,3395E-05 A10 = -5,2397E-06 1,1872E-05 -1,1135E-06 -6,5651E-07 A12 = 1,2831E-07 -6,5618E-07 2,4456E-08 1,2456E-08

[0138] In the fourth embodiment, the equation for the aspherical surface profiles of the aforementioned lens elements is the same as the equation for the first embodiment. The definitions of the parameters listed in Table 4C are also the same as those of the first embodiment, with corresponding values ​​for the fourth embodiment, so no further explanation is given here.

[0139] Furthermore, these parameters from Table 4A and Table 4B can be calculated as the following values ​​and satisfy the following conditions: TABLE 4C Schematic parameters f [mm] 11,36 f / CT1 3,86 Fno 1,84 CT3 / CT1 0,16 HFOV [Grade] 23,6 T23 / CT2 0,81 FOV [degrees] 47,2 CTn / CT2 0,28 SL / TL 0,68 CT7 / CT2 0,41 TD / f 2,01 CT6 / CT5 0,70 |f3 / f| 0,57 CT7 / (T56+T67) 0,28 f / f5 0,61 N6 1,729 f / f7 -1,03 V2-V1 -17,7 |f3 / f12| 0,02 SAG7R1 / CT7 -2,31 R4 / f 0,57 CT1 / ET1+ET2 / CT2 2,58 R6 / R7 1,00 ET7 / ET5 1,22 |R5+R6| / |R5-R6| 0,06 Y1R1 / lmgH 1,40 (R7+R8) / (R7-R8) 0,03 (Y5R1-Y5R2) / (Y5R1-Y4R2) 0,25 R13 / |R12| -0,11 - - 5. Design

[0140] Fig. Figure 9 is a schematic view of an image acquisition unit according to the 5th embodiment of the present disclosure. Fig. Figure 10 shows, in order from left to right, spherical aberration curves, astigmatic field curves, and a distortion curve of the image acquisition unit according to the 5th embodiment. Fig.9 The image acquisition unit 5 comprises the optical lens assembly for photography (whose reference numeral is omitted) of the present disclosure and an image sensor IS. The optical lens assembly for photography comprises, in order from an object side to an image side along an optical axis, a first lens element E1, a second lens element E2, an aperture diaphragm ST, a third lens element E3, a fourth lens element E4, a fifth lens element E5, an aperture S1, a sixth lens element E6, a seventh lens element E7, a filter E8, and an image surface IMG. The optical lens assembly for photography comprises seven lens elements (E1, E2, E3, E4, E5, E6, and E7), with no additional lens element arranged between any of the seven adjacent lens elements.

[0141] The first lens element E1 with positive refractive power has an object-side surface that is convex in a paraxial region and an image-side surface that is concave in a paraxial region. The first lens element E1 is made of glass and both its object-side and image-side surfaces are spherical.

[0142] The second lens element E2, with negative refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is concave in a paraxial region. The second lens element E2 is made of glass and both its object-side and image-side surfaces are aspherical.

[0143] The third lens element E3, with negative refractive power, has an object-side surface that is concave in a paraxial region, and an image-side surface that is also concave in a paraxial region. The third lens element E3 is made of glass and both its object-side and image-side surfaces are spherical.

[0144] The fourth lens element E4, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is also convex in a paraxial region. The fourth lens element E4 is made of glass and both its object-side and image-side surfaces are spherical. The object-side surface of the fourth lens element E4 is cemented to the image-side surface of the third lens element E3. The third lens element E3 and the fourth lens element E4 form a cemented lens element set.

[0145] The fifth lens element E5, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is also convex in a paraxial region. The fifth lens element E5 is made of glass and both its object-side and image-side surfaces are spherical.

[0146] The sixth lens element E6, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is concave in a paraxial region. The sixth lens element E6 is made of glass and both its object-side and image-side surfaces are spherical.

[0147] The seventh lens element E7, with negative refractive power, has an object-side surface that is concave in a paraxial region and an image-side surface that is planar in a paraxial region. The seventh lens element E7 is made of glass and both its object-side and image-side surfaces are spherical.

[0148] The E8 filter is made of glass and is located between the seventh lens element E7 and the image surface IMG. It does not affect the focal length of the optical lens assembly used for photography. The IS image sensor is located on or near the image surface IMG of the optical lens assembly used for photography.

[0149] The detailed optical data of the 5th embodiment are listed in Table 5A and the aspherical surface data are listed in Table 5B below. TABLE 5A 5. Design f = 15.26 mm, Fno = 1.65, HFOV = 17.2 degrees Surface # radius of curvature thickness material index Abbe # Focal length 0 object infinity infinity 1 Lens 1 18,6973 (SPH) 2,863 Glass 1,804 46,6 33.12 2 58,4762 (SPH) 0,724 3 Lens 2 10,7224 (ASP) 2,387 Glass 1,589 61,2 -47.38 4 7,1072 (ASP) 1,322 5 Ape, -panel Plano 1,081 6 Lens 3 -10,5132 (SPH) 0,800 Glass 1,648 33,8 -6.95 7 8,1152 (SPH) 0,005 Sealed 1,550 43,9 - 8 Lens 4 8,1152 (SPH) 4,000 Glass 1,692 54,5 8.24 9 -15,3143 (SPH) 0,100 10 Lens 5 11,6786 (SPH) 4,200 Glass 1,593 68,3 14.74 11 -30,0764 (SPH) 2,947 12 Aperture Plano 0,950 13 Lens 6 22,6300 (SPH) 2,154 Glass 1,835 42,7 31.39 14 158,6804 (SPH) 1,666 15 Lens 7 -8,2657 (SPH) 0,800 Glass 1,603 38,0 -13.70 16 Plano (SPH) 1,000 17 filter Plano 1,050 Glass 1,517 64,2 - 18 Plano 0,953 19 Picture Plano - Note: Reference wavelength is 587.6 nm (d-line). An effective radius of aperture S1 (surface 12) is 4.572 mm. TABLE 5B Aspheric coefficients Surface # 3 4 k = -1,36954E+00 -1,16399E+00 A4 = 4,9976E-06 2,7354E-04 A6 = 3,3763E-07 -1,2822E-06 A8 = 1,0097E-08 9,0595E-07 A10 = -3,2428E-09 -6,4954E-08 A12 = 7,7527E-11 1,8830E-09

[0150] In the 5th embodiment, the equation for the aspherical surface profiles of the aforementioned lens elements is the same as the equation for the 1st embodiment. The definitions of the parameters listed in Table 5C are also the same as those for the 1st embodiment, with corresponding values ​​for the 5th embodiment, so no further explanation is given here.

[0151] Furthermore, these parameters from Table 5A and Table 5B can be calculated as the following values ​​and satisfy the following conditions: TABLE 5C Schematic parameters f [mm] 15,26 f / CT1 5,33 Fno 1,65 CT3 / CT1 0,28 HFOV [Grade] 17,2 T23 / CT2 1,01 FOV [degrees] 34,4 CTn / CT2 0,34 SL / TL 0,75 CT7 / CT2 0,34 TD / f 1,70 CT6 / CT5 0,51 |f3 / f| 0,46 CT7 / (T56+T67) 0,14 f / f5 1,04 N6 1,835 f / f7 -1,11 V2-V1 14,6 |f3 / f12| 0,10 SAG7R1 / CT7 -1,37 R4 / f 0,47 CT1 / ET1+ET2 / CT2 2,39 R6 / R7 1,00 ET7 / ET5 0,81 |R5+R6| / |R5-R6| 0,13 Y1R1 / lmgH 1,38 (R7+R8) / (R7-R8) -0,31 (Y5R1-Y5R2) / (Y5R1-Y4R2) 0,31 R13 / |R12| -0,05 - - 6. Design

[0152] Fig. Figure 11 is a schematic view of an image acquisition unit according to the 6th embodiment of the present disclosure. Fig. Figure 12 shows, in order from left to right, spherical aberration curves, astigmatic field curves, and a distortion curve of the image acquisition unit according to the 6th embodiment. Fig.11 The image acquisition unit 6 comprises the optical lens assembly for photography (whose reference numeral is omitted) of the present disclosure and an image sensor IS. The optical lens assembly for photography comprises, in order from an object side to an image side along an optical axis, a first lens element E1, a second lens element E2, an aperture diaphragm ST, a third lens element E3, a fourth lens element E4, a fifth lens element E5, a sixth lens element E6, a seventh lens element E7, a filter E8, and an image surface IMG. The optical lens assembly for photography comprises seven lens elements (E1, E2, E3, E4, E5, E6, and E7), with no additional lens element arranged between any of the adjacent seven lens elements.

[0153] The first lens element E1 with positive refractive power has an object-side surface that is convex in a paraxial region and an image-side surface that is concave in a paraxial region. The first lens element E1 is made of glass and both its object-side and image-side surfaces are spherical.

[0154] The second lens element E2, with negative refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is concave in a paraxial region. The second lens element E2 is made of glass and both its object-side and image-side surfaces are aspherical.

[0155] The third lens element E3, with negative refractive power, has an object-side surface that is concave in a paraxial region, and an image-side surface that is also concave in a paraxial region. The third lens element E3 is made of glass and both its object-side and image-side surfaces are spherical.

[0156] The fourth lens element E4, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is also convex in a paraxial region. The fourth lens element E4 is made of glass and both its object-side and image-side surfaces are spherical. The object-side surface of the fourth lens element E4 is cemented to the image-side surface of the third lens element E3. The third lens element E3 and the fourth lens element E4 form a cemented lens element set.

[0157] The fifth lens element E5, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is also convex in a paraxial region. The fifth lens element E5 is made of glass and both its object-side and image-side surfaces are spherical.

[0158] The sixth lens element E6, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is concave in a paraxial region. The sixth lens element E6 is made of plastic material and both its object-side and image-side surfaces are aspherical.

[0159] The seventh lens element E7, with negative refractive power, has an object-side surface that is concave in a paraxial region, and an image-side surface that is also concave in a paraxial region. The seventh lens element E7 is made of plastic material and both its object-side and image-side surfaces are aspherical.

[0160] The E8 filter is made of glass and is positioned between the seventh lens element E7 and the image surface IMG. It does not affect the focal length of the optical lens assembly used for photography. The IS image sensor is located on or near the image surface IMG of the optical lens assembly used for photography.

[0161] The detailed optical data of the 6th embodiment are listed in Table 6A and the data of the aspherical surfaces are listed in Table 6B below. TABLE 6A 6. Design f = 14.75 mm, Fno = 1.55, HFOV = 15.8 degrees Surface # radius of curvature thickness material index Abbe # Focal length 0 object infinity infinity 1 Lens 1 16,3739 (SPH) 2,914 Glass 1,834 37,2 30.31 2 42,7181 (SPH) 0,090 3 Lens 2 10,4542 (ASP) 2,500 Glass 1,946 17,9 -46.36 4 7,4604 (ASP) 1,883 5 Ape, -panel Plano 0,638 6 Lens 3 -14,9154 (SPH) 0,612 Glass 1,728 28,3 -6.94 7 7,7786 (SPH) 0,005 Sealed 1,550 43,9 - 8 Lens 4 7,7786 (SPH) 4,304 Glass 1,729 54,7 9.15 9 -35,9509 (SPH) 0,100 10 Lens 5 9,8073 (SPH) 4,232 Glass 1,729 54,7 11.50 11 -47,2905 (SPH) 0,100 12 Lens 6 19,5989 (ASP) 2,132 plastic 1,705 14,0 36.96 13 75,5829 (ASP) 3,828 14 Lens 7 -10,6427 (ASP) 0,752 plastic 1,705 14,0 -11.83 15 39,5765 (ASP) 0,800 16 filter Plano 1,050 Glass 1,517 64,2 - 17 Plano 0,901 18 Picture Plano - Note: Reference wavelength is 587.6 nm (d-line). TABLE 6B Aspheric coefficients Surface # 3 4 12 k = 8,90822E-02 -3,17758E+00 2,34360E+00 A4 = -7,5436E-05 8,9665E-04 -5,3287E-05 A6 = 1,0429E-06 2,9402E-06 1,1559E-05 A8 = -1,6698E-07 -1,6660E-06 -5,4940E-07 A10 = 7,2970E-09 1,4751E-07 1,9325E-08 A12 = -1,2243E-10 -3,9562E-09 -3,3066E-10 Surface # 13 14 15 k = 7,91742E+01 4,63592E+00 -8,05764E+01 A4 = -1,3524E-04 -9,6076E-03 -9,4761E-03 A6 = 2,4633E-05 7,4282E-04 8,0570E-04 A8 = -1,2960E-06 -2,5736E-05 -4,1246E-05 A10 = 5,4170E-08 4,6940E-07 1,4107E-06 A12 = -1,0102E-09 5,6721E-10 -2,1987E-08

[0162] In the 6th embodiment, the equation for the aspherical surface profiles of the aforementioned lens elements is the same as the equation for the 1st embodiment. The definitions of the parameters listed in Table 6C are also the same as those for the 1st embodiment, with corresponding values ​​for the 6th embodiment, so no further explanation is given here.

[0163] Furthermore, these parameters from Table 6A and Table 6B can be calculated as the following values ​​and satisfy the following conditions: TABLE 6C Schematic parameters f [mm] 14,75 f / CT1 5,06 Fno 1,55 CT3 / CT1 0,21 HFOV [Grade] 15,8 T23 / CT2 1,01 FOV [degrees] 31,6 CTn / CT2 0,24 SL / TL 0,72 CT7 / CT2 0,30 TD / f 1,63 CT6 / CT5 0,50 |f3 / f| 0,47 CT7 / (T56+T67) 0,19 f / f5 1,28 N6 1,705 f / f7 -1,25 V2-V1 -19,3 |f3 / f12| 0,13 SAG7R1 / CT7 -1,97 R4 / f 0,51 CT1 / ET1+ET2 / CT2 2,37 R6 / R7 1,00 ET7 / ET5 1,02 |R5+R6| / |R5-R6| 0,31 Y1R1 / lmgH 1,54 (R7+R8) / (R7-R8) -0,64 (Y5R1-Y5R2) / (Y5R1-Y4R2) 0,22 R13 / |R12| -0,14 - - 7. Design

[0164] Fig. Figure 13 is a schematic view of an image acquisition unit according to the 7th embodiment of the present disclosure. Fig. Figure 14 shows, from left to right, spherical aberration curves, astigmatic field curves, and a distortion curve of the image acquisition unit according to the 7th embodiment. Fig.13 The image acquisition unit 7 comprises the optical lens assembly for photography (whose reference numeral is omitted) of the present disclosure and an image sensor IS. The optical lens assembly for photography comprises, in order from an object side to an image side along an optical axis, a first lens element E1, a second lens element E2, an aperture diaphragm ST, a third lens element E3, a fourth lens element E4, an aperture S1, a fifth lens element E5, a sixth lens element E6, a seventh lens element E7, a filter E8, and an image surface IMG. The optical lens assembly for photography comprises seven lens elements (E1, E2, E3, E4, E5, E6, and E7), with no additional lens element arranged between any of the adjacent seven lens elements.

[0165] The first lens element E1 with negative refractive power has an object-side surface that is convex in a paraxial region and an image-side surface that is concave in a paraxial region. The first lens element E1 is made of plastic material and both the object-side and image-side surfaces are aspherical.

[0166] The second lens element E2, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is concave in a paraxial region. The second lens element E2 is made of plastic material and both its object-side and image-side surfaces are aspherical.

[0167] The third lens element E3, with negative refractive power, has an object-side surface that is concave in a paraxial region, and an image-side surface that is also concave in a paraxial region. The third lens element E3 is made of glass and both its object-side and image-side surfaces are spherical.

[0168] The fourth lens element E4, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is also convex in a paraxial region. The fourth lens element E4 is made of glass and both its object-side and image-side surfaces are spherical. The object-side surface of the fourth lens element E4 is cemented to the image-side surface of the third lens element E3. The third lens element E3 and the fourth lens element E4 form a cemented lens element set.

[0169] The fifth lens element E5, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is also convex in a paraxial region. The fifth lens element E5 is made of plastic material and both its object-side and image-side surfaces are aspherical.

[0170] The sixth lens element E6, with negative refractive power, has an object-side surface that is concave in a paraxial region and an image-side surface that is convex in a paraxial region. The sixth lens element E6 is made of glass and both its object-side and image-side surfaces are spherical.

[0171] The seventh lens element E7, with negative refractive power, has an object-side surface that is concave in a paraxial region and an image-side surface that is convex in a paraxial region. The seventh lens element E7 is made of glass and both its object-side and image-side surfaces are spherical.

[0172] The E8 filter is made of glass and is located between the seventh lens element E7 and the image surface IMG. It does not affect the focal length of the optical lens assembly used for photography. The IS image sensor is located on or near the image surface IMG of the optical lens assembly used for photography.

[0173] The detailed optical data of the 7th embodiment are listed in Table 7A and the data of the aspherical surface are listed in Table 7B below. TABLE 7A 7. Design f = 14.88 mm, Fno = 1.60, HFOV = 17.4 degrees Surface # radius of curvature thickness material index Abbe # Focal length 0 object infinity infinity 1 Lens 1 12,3705 (ASP) 3,798 plastic 1,567 37,4 -62,59 2 8,1528 (ASP) 0,440 3 Lens 2 5,2467 (ASP) 1,821 plastic 1,562 44,6 32,23 4 6,4647 (ASP) 1,241 5 Ape, -panel Plano 0,786 6 Lens 3 -11,7571 (SPH) 0,698 Glass 1,620 36,3 -7,45 7 7,7871 (SPH) 0,005 Sealed 1,550 43,9 - 8 Lens 4 7,7871 (SPH) 2,845 Glass 1,729 54,7 7,65 9 -16,6274 (SPH) -0,490 10 Aperture Plano 0,590 11 Lens 5 8,7503 (ASP) 3,935 plastic 1,544 56,0 9,99 12 -12,0807 (ASP) 0,100 13 Lens 6 -24,4311 (SPH) 3,887 Glass 1,755 27,5 -47,74 14 -80,9756 (SPH) 3,448 15 Lens 7 -5,8417 (SPH) 0,663 Glass 1,516 56,8 -13.59 16 -36,3636 (SPH) 0,700 17 filter Plano 1,100 Glass 1,517 64,2 - 18 Plano 1,004 19 Picture Plano - Note: Reference wavelength is 587.6 nm (d-line). An effective radius of aperture S1 (surface 10) is 4.417 mm. TABLE 7B Aspheric coefficients Surface # 1 2 3 k = -2,68663E-01 -1,57347E+01 -5,93129E+00 A4 = -2,8001E-05 -1,0731E-03 -7,1930E-04 A6 = 3,1455E-06 1,1039E-04 3,7499E-05 A8 = -6,9424E-08 -4,0080E-06 2,8942E-06 A10 = -4,9263E-11 4,7441E-08 -2,4041E-07 A12 = - - 4,2869E-09 Surface # 4 11 12 k = -6,47512E-01 -1,56182E-01 -4,85242E+00 A4 = -1,1398E-03 -1,3342E-04 -1,5152E-04 A6 = 1,6318E-05 5,4568E-06 3,0918E-06 A8 = 5,7223E-06 -2,2670E-07 -4,8877E-08 A10 = -3,7643E-07 1,1868E-08 7,7350E-09 A12 = 7,5435E-09 -2,0834E-10 -1,9349E-10

[0174] In the 7th embodiment, the equation for the aspherical surface profiles of the aforementioned lens elements is the same as the equation for the 1st embodiment. The definitions of the parameters listed in Table 7C are also the same as those for the 1st embodiment, with corresponding values ​​for the 7th embodiment, so no further explanation is given here.

[0175] Furthermore, these parameters from Table 7A and Table 7B can be calculated as the following values ​​and satisfy the following conditions: TABLE 7C Schematic parameters f [mm] 14,88 f / CT1 3,92 Fno 1,60 CT3 / CT1 0,18 HFOV [Grade] 17,4 T23 / CT2 1,11 FOV [degrees] 34,8 CTn / CT2 0,38 SL / TL 0,73 CT7 / CT2 0,36 TD / f 1,60 CT6 / CT5 0,99 |f3 / f| 0,50 CT7 / (T56+T67) 0,19 f / f5 1,49 N6 1,755 f / f7 -1,09 V2-V1 7,2 |f3 / f12| 0,08 SAG7R1 / CT7 -2,17 R4 / f 0,43 CT1 / ET1+ET2 / CT2 2,15 R6 / R7 1,00 ET7 / ET5 1,21 |R5+R6| / |R5-R6| 0,20 Y1R1 / lmgH 1,31 (R7+R8) / (R7-R8) -0,36 (Y5R1-Y5R2) / (Y5R1-Y4R2) 0,22 R13 / |R12| -0,07 - - 8. Design

[0176] Fig. Figure 15 is a schematic view of an image acquisition unit according to the 8th embodiment of the present disclosure. Fig. Figure 16 shows, in order from left to right, spherical aberration curves, astigmatic field curves, and a distortion curve of the image acquisition unit according to embodiment 8. Fig.15 The image acquisition unit 8 comprises the optical lens assembly for photography (whose reference numeral is omitted) of the present disclosure and an image sensor IS. The optical lens assembly for photography comprises, in order from an object side to an image side along an optical axis, a first lens element E1, a second lens element E2, an aperture diaphragm ST, a third lens element E3, a fourth lens element E4, a fifth lens element E5, a sixth lens element E6, a seventh lens element E7, a filter E8, and an image surface IMG. The optical lens assembly for photography comprises seven lens elements (E1, E2, E3, E4, E5, E6, and E7), with no additional lens element arranged between any of the adjacent seven lens elements.

[0177] The first lens element E1 with positive refractive power has an object-side surface that is convex in a paraxial region and an image-side surface that is also convex in a paraxial region. The first lens element E1 is made of glass and both its object-side and image-side surfaces are spherical.

[0178] The second lens element E2, with negative refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is concave in a paraxial region. The second lens element E2 is made of glass and both its object-side and image-side surfaces are aspherical.

[0179] The third lens element E3, with negative refractive power, has an object-side surface that is concave in a paraxial region, and an image-side surface that is also concave in a paraxial region. The third lens element E3 is made of plastic material and both its object-side and image-side surfaces are aspherical.

[0180] The fourth lens element E4, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is also convex in a paraxial region. The fourth lens element E4 is made of plastic material and both its object-side and image-side surfaces are aspherical.

[0181] The fifth lens element E5, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is also convex in a paraxial region. The fifth lens element E5 is made of glass and both its object-side and image-side surfaces are spherical.

[0182] The sixth lens element E6, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is concave in a paraxial region. The sixth lens element E6 is made of glass and both its object-side and image-side surfaces are spherical.

[0183] The seventh lens element E7, with negative refractive power, has an object-side surface that is concave in a paraxial region and an image-side surface that is planar in a paraxial region. The seventh lens element E7 is made of glass and both its object-side and image-side surfaces are spherical.

[0184] The E8 filter is made of glass and is located between the seventh lens element E7 and the image surface IMG. It does not affect the focal length of the optical lens assembly used for photography. The IS image sensor is located on or near the image surface IMG of the optical lens assembly used for photography.

[0185] The detailed optical data of the 8th embodiment are listed in Table 8A and the data of the aspherical surface are listed in Table 8B below. TABLE 8A 8. Design f = 19.83 mm, Fno = 1.45, HFOV = 13.2 degrees Surface# radius of curvature thickness material index Abbe# Focal length 0 object infinity infinity 1 Lens 1 18,0579 (SPH) 4,202 Glass 1,729 54,7 23.03 2 216,7776 (SPH) 0,581 3 Lens 2 18,5676 (ASP) 2,321 Glass 1,785 25,7 -24.64 4 8,9515 (ASP) 1,900 5 Ape, -panel Plano 0,704 6 Lens 3 -24,3542 (ASP) 0,697 plastic 1,551 44,8 -16.73 7 14,9669 (ASP) 0,155 8 Lens 4 15,9664 (ASP) 2,637 plastic 1,544 56,0 22.17 9 -46,4778 (ASP) 0,131 10 Lens 5 23,5389 (SPH) 4,383 Glass 1,691 54,9 15.64 11 -18,4549 (SPH) 5,529 12 Lens 6 25,1441 (SPH) 3,663 Glass 1,911 35,2 29.69 13 333,3619 (SPH) 1,534 14 Lens 7 -10,0518 (SPH) 0,864 Glass 1,808 22,7 -12.44 15 Plano (SPH) 1,000 16 filter Plano 1,100 Glass 1,517 64,2 - 17 Plano 1,403 18 Picture Plano - Note: Reference wavelength is 587.6 nm (d-line). TABLE 8B Aspheric coefficients Surface # 3 4 6 k = -2,67776E+00 -4,75374E+00 -8,76644E+00 A4 = -9,2958E-05 8,7780E-04 7,6425E-04 A6 = -1,1015E-06 -8,6739E-06 -4,9045E-05 A8 = -9,9042E-08 -2,1570E-07 1,0194E-06 A10 = 2,6835E-09 5,3003E-09 -6,9093E-09 A12 = -2,1812E-11 2,8778E-11 2,3856E-11 Surface # 7 8 9 k = -1,89654E+00 -8,64069E-01 2,52763E+01 A4 = 1,4601E-03 8,3297E-04 1,0400E-05 A6 = -1,2167E-04 -7,1281E-05 -1,2306E-05 A8 = 3,4524E-06 2,2129E-06 7,5178E-07 A10 = -4,5567E-08 -3,4256E-08 -1,7769E-08 A12 = 2,2247E-10 2,2799E-10 1,5951E-10

[0186] In the 8th embodiment, the equation for the aspherical surface profiles of the aforementioned lens elements is the same as the equation for the 1st embodiment. The definitions of the parameters listed in Table 8C are also the same as those for the 1st embodiment, with corresponding values ​​for the 8th embodiment, so no further explanation is given here.

[0187] Furthermore, these parameters from Table 8A and Table 8B can be calculated as the following values ​​and satisfy the following conditions: TABLE 8C Schematic parameters f [mm] 19,83 f / CT1 4,72 Fno 1,45 CT3 / CT1 0,17 HFOV [Grade] 13,2 T23 / CT2 1,12 FOV [degrees] 26,4 CTn / CT2 - SL / TL 0,73 CT7 / CT2 0,37 TD / f 1,48 CT6 / CT5 0,84 |f3 / f| 0,84 CT7 / (T56+T67) 0,12 f / f5 1,27 N6 1,911 f / f7 -1,59 V2-V1 -29,0 |f3 / f12| 0,21 SAG7R1 / CT7 -1,25 R4 / f 0,45 CT1 / ET1+ET2 / CT2 3,47 R6 / R7 0,94 ET7 / ET5 1,06 |R5+R6| / |R5-R6| 0,24 Y1R1 / lmgH 1,77 (R7+R8) / (R7-R8) -0,49 (Y5R1-Y5R2) / (Y5R1-Y4R2) -0,14 R13 / |R12| -0,03 - - 9. Design

[0188] Fig. Figure 17 is a schematic view of an image acquisition unit according to the 9th embodiment of the present disclosure. Fig. Figure 18 shows, in order from left to right, spherical aberration curves, astigmatic field curves, and a distortion curve of the image acquisition unit according to embodiment 9. Fig.17 The image acquisition unit 9 comprises the optical lens assembly for photography (whose reference numeral is omitted) of the present disclosure and an image sensor IS. The optical lens assembly for photography comprises, in order from an object side to an image side along an optical axis, a first lens element E1, a second lens element E2, an aperture diaphragm ST, a third lens element E3, a fourth lens element E4, a fifth lens element E5, a sixth lens element E6, a seventh lens element E7, a filter E8, and an image surface IMG. The optical lens assembly for photography comprises seven lens elements (E1, E2, E3, E4, E5, E6, and E7), with no additional lens element arranged between any of the adjacent seven lens elements.

[0189] The first lens element E1 with positive refractive power has an object-side surface that is convex in a paraxial region and an image-side surface that is concave in a paraxial region. The first lens element E1 is made of glass and both its object-side and image-side surfaces are spherical.

[0190] The second lens element E2, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is concave in a paraxial region. The second lens element E2 is made of plastic material and both its object-side and image-side surfaces are aspherical.

[0191] The third lens element E3, with negative refractive power, has an object-side surface that is concave in a paraxial region, and an image-side surface that is also concave in a paraxial region. The third lens element E3 is made of glass and both its object-side and image-side surfaces are spherical.

[0192] The fourth lens element E4, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is also convex in a paraxial region. The fourth lens element E4 is made of glass and both its object-side and image-side surfaces are spherical. The object-side surface of the fourth lens element E4 is cemented to the image-side surface of the third lens element E3. The third lens element E3 and the fourth lens element E4 form a cemented lens element set.

[0193] The fifth lens element E5, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is also convex in a paraxial region. The fifth lens element E5 is made of plastic material and both its object-side and image-side surfaces are aspherical.

[0194] The sixth lens element E6, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is also convex in a paraxial region. The sixth lens element E6 is made of glass and both its object-side and image-side surfaces are spherical.

[0195] The seventh lens element E7, with negative refractive power, has an object-side surface that is concave in a paraxial region, and an image-side surface that is also concave in a paraxial region. The seventh lens element E7 is made of glass and both its object-side and image-side surfaces are spherical.

[0196] The E8 filter is made of glass and is located between the seventh lens element E7 and the image surface IMG. It does not affect the focal length of the optical lens assembly used for photography. The IS image sensor is located on or near the image surface IMG of the optical lens assembly used for photography.

[0197] The detailed optical data of the 9th embodiment are listed in Table 9A and the aspherical surface data are listed in Table 9B below. TABLE 9A 9. Design f = 14.59 mm, Fno = 1.63, HFOV = 17.8 degrees Surface # radius of curvature thickness material index Abbe # Focal length 0 object infinity infinity 1 Lens 1 29,0214 (SPH) 2,379 Glass 1,805 39,6 61.22 2 68,0788 (SPH) 0,112 3 Lens 2 13,4155 (ASP) 2,584 plastic 1,544 56,0 73.57 4 18,8099 (ASP) 3,651 5 Ape, -panel Plano 1,982 6 Lens 3 -6,5402 (SPH) 0,602 Glass 1,717 29,5 -5.89 7 12,4177 (SPH) 0,005 Sealed 1,550 43,9 - 8 Lens 4 12,4177 (SPH) 3,552 Glass 1,757 47,7 8.02 9 -10,4195 (SPH) 0,093 10 Lens 5 10,9709 (ASP) 3,953 plastic 1,544 56,0 18.08 11 -83,1231 (ASP) 1,878 12 Lens 6 14,7964 (SPH) 3,502 Glass 1,755 52,3 13.12 13 -26,9167 (SPH) 1,142 14 Lens 7 -8,9391 (SPH) 1,208 Glass 1,729 54,7 -8.69 15 22,9962 (SPH) 1,100 16 filter Plano 1,000 Glass 1,517 64,2 - 17 Plano 1,422 18 Picture Plano - Note: Reference wavelength is 587.6 nm (d-line). TABLE 9B Aspheric coefficients Surface # 3 4 10 11 k = -2,61157E-01 7,30210E-01 1,44895E-01 -1,84755E+01 A4 = 2,4137E-05 -2,3000E-05 9,2731E-05 1,3636E-04 A6 = 1,8606E-06 -6,6889E-06 -1,5057E-06 7,1300E-06 A8 = -2,3780E-07 1,9361E-07 1,4493E-07 -9,5731E-07 A10 = 1,1941E-08 -4,8810E-09 -1,3138E-08 4,8180E-08 A12 = -3,3838E-10 -3,4631E-10 4,8423E-10 -1,2259E-09 A14 = 2,9448E-12 8,3606E-12 -7,5132E-12 1,0270E-11

[0198] In the 9th embodiment, the equation for the aspherical surface profiles of the aforementioned lens elements is the same as the equation for the 1st embodiment. The definitions of the parameters listed in Table 9C are also the same as those for the 1st embodiment, with corresponding values ​​for the 9th embodiment, so no further explanation is given here.

[0199] Furthermore, these parameters from Table 9A and Table 9B can be calculated as the following values ​​and satisfy the following conditions: TABLE 9C Schematic parameters f [mm] 14,59 f / CT1 6,13 Fno 1,63 CT3 / CT1 0,25 HFOV [Grade] 17,8 T23 / CT2 2,18 FOV [degrees] 35,6 CTn / CT2 0,23 SL / TL 0,71 CT7 / CT2 0,47 TD / f 1,83 CT6 / CT5 0,89 |f3 / f| 0,40 CT7 / (T56+T67) 0,40 f / f5 0,81 N6 1,755 f / f7 -1,68 V2-V1 16,4 |f3 / f12| 0,18 SAG7R1 / CT7 -1,05 R4 / f 1,29 CT1 / ET1+ET2 / CT2 2,02 R6 / R7 1,00 ET7 / ET5 1,66 |R5+R6| / |R5-R6| 0,31 Y1R1 / lmgH 1,56 (R7+R8) / (R7-R8) 0,09 (Y5R1-Y5R2) / (Y5R1-Y4R2) -0,10 R13 / |R12| -0,33 - - 10. Design

[0200] Fig. Figure 19 is a schematic view of an image acquisition unit according to the 10th embodiment of the present disclosure. Fig. Figure 20 shows, in order from left to right, spherical aberration curves, astigmatic field curves, and a distortion curve of the image acquisition unit according to embodiment 10. Fig.19 The image acquisition unit 10 comprises the optical lens assembly for photography (whose reference numeral is omitted) of the present disclosure and an image sensor IS. The optical lens assembly for photography comprises, in order from an object side to an image side along an optical axis, a first lens element E1, a second lens element E2, an aperture diaphragm ST, a third lens element E3, a fourth lens element E4, a fifth lens element E5, a sixth lens element E6, a seventh lens element E7, a filter E8, and an image surface IMG. The optical lens assembly for photography comprises seven lens elements (E1, E2, E3, E4, E5, E6, and E7), with no additional lens element arranged between any of the adjacent seven lens elements.

[0201] The first lens element E1 with positive refractive power has an object-side surface that is convex in a paraxial region and an image-side surface that is concave in a paraxial region. The first lens element E1 is made of glass and both its object-side and image-side surfaces are spherical.

[0202] The second lens element E2, with negative refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is concave in a paraxial region. The second lens element E2 is made of glass and both its object-side and image-side surfaces are aspherical.

[0203] The third lens element E3, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is also convex in a paraxial region. The third lens element E3 is made of glass and both its object-side and image-side surfaces are spherical.

[0204] The fourth lens element E4, with negative refractive power, has an object-side surface that is concave in a paraxial region and an image-side surface that is also concave in a paraxial region. The fourth lens element E4 is made of glass and both its object-side and image-side surfaces are spherical. The object-side surface of the fourth lens element E4 is cemented to the image-side surface of the third lens element E3. The third lens element E3 and the fourth lens element E4 form a cemented lens element set.

[0205] The fifth lens element E5, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is also convex in a paraxial region. The fifth lens element E5 is made of glass and both its object-side and image-side surfaces are spherical.

[0206] The sixth lens element E6, with positive refractive power, has an object-side surface that is concave in a paraxial region and an image-side surface that is convex in a paraxial region. The sixth lens element E6 is made of glass and both its object-side and image-side surfaces are spherical.

[0207] The seventh lens element E7, with negative refractive power, has an object-side surface that is concave in a paraxial region and an image-side surface that is convex in a paraxial region. The seventh lens element E7 is made of glass and both its object-side and image-side surfaces are spherical.

[0208] The E8 filter is made of glass and is located between the seventh lens element E7 and the image surface IMG. It does not affect the focal length of the optical lens assembly used for photography. The IS image sensor is located on or near the image surface IMG of the optical lens assembly used for photography.

[0209] The detailed optical data of the 10th embodiment are listed in Table 10A and the data of the aspherical surface are listed in Table 10B below. TABLE 10A 10. Design f = 16.54 mm, Fno = 1.73, HFOV = 15.1 degrees Surface # radius of curvature thickness material index Abbe # Focal length 0 object infinity infinity 1 Lens 1 13,3114 (SPH) 4,085 Glass 1,946 17,9 19.46 2 40,9149 (SPH) 0,192 3 Lens 2 18,9405 (ASP) 1,572 Glass 1,946 17,9 -14.81 4 7,7268 (ASP) 4,673 5 Ape, -panel Plano -0,652 6 Lens 3 9,1329 (SPH) 2,431 Glass 1,729 54,7 7.35 7 -11,5004 (SPH) 0,050 Sealed 1,550 43,9 - 8 Lens 4 -11,5004 (SPH) 0,514 Glass 1,847 23,8 -5.85 9 8,8718 (SPH) 1,253 10 Lens 5 15,5194 (SPH) 3,346 Glass 1,729 54,7 12.80 11 -21,3063 (SPH) 0,120 12 Lens 6 -66,8068 (SPH) 3,571 Glass 1,946 17,9 18.06 13 -13,9609 (SPH) 5,463 14 Lens 7 -7,6619 (SPH) 1,179 Glass 1,625 35,6 -12.88 15 -167,2224 (SPH) 0,900 16 filter Plano 1,100 Glass 1,517 64,2 - 17 Plano 0,331 18 Picture Plano - Note: Reference wavelength is 587.6 nm (d-line). TABLE 10B Aspheric coefficients Surface # 3 4 k = 3,49069E+00 -2,56055E+00 A4 = -2,4350E-05 8,8572E-04 A6 = -2,7342E-06 -2,1922E-06 A8 = 2,2866E-08 -2,2128E-07 A10 = 5,0599E-10 3,1593E-08 A12 = -1,8518E-11 -7,3323E-10

[0210] In the 10th embodiment, the equation for the aspherical surface profiles of the aforementioned lens elements is the same as the equation for the 1st embodiment. The definitions of the parameters listed in Table 10C are also the same as in the 1st embodiment, with corresponding values ​​for the 10th embodiment, so further explanation is unnecessary.

[0211] Furthermore, these parameters from Table 10A and Table 10B can be calculated as the following values ​​and satisfy the following conditions: TABLE 10C Schematic parameters f [mm] 16,54 f / CT1 4,05 Fno 1,73 CT3 / CT1 0,60 HFOV [Grade] 15,1 T23 / CT2 2,56 FOV [degrees] 30,2 CTn / CT2 0,33 SL / TL 0,65 CT7 / CT2 0,75 TD / f 1,68 CT6 / CT5 1,07 |f3 / f| 0,44 CT7 / (T56+T67) 0,21 f / f5 1,29 N6 1,946 f / f7 -1,28 V2-V1 0,0 |f3 / f12| 0,002 SAG7R1 / CT7 -0,92 R4 / f 0,47 CT1 / ET1+ET2 / CT2 3,22 R6 / R7 1,00 ET7 / ET5 1,03 |R5+R6| / |R5-R6| 0,11 Y1R1 / lmgH 1,65 (R7+R8) / (R7-R8) 0,13 (Y5R1-Y5R2) / (Y5R1-Y4R2) -0,53 R13 / |R12| -0,55 - - 11. Design

[0212] Fig. Figure 21 is a perspective view of an image acquisition unit according to the 11th embodiment of the present disclosure.

[0213] In this embodiment, an image acquisition unit 100 is a camera module comprising a lens unit 101, a drive device 102, an image sensor 103, and an image stabilizer 104. The lens unit 101 comprises the optical lens assembly for photography disclosed in the first embodiment, a tube, and a holder (whose reference numerals have been omitted) for holding the optical lens assembly for photography. However, the lens unit 101 can alternatively be provided with the optical lens assembly for photography disclosed in other embodiments of the present disclosure, and the present disclosure is not limited thereto.The imaging light is focused in the lens unit 101 of the image acquisition unit 100 to generate an image with the drive device 102, which is used for image focusing on the image sensor 103, and the generated image is then digitally transmitted to other electronic components for further processing.

[0214] The drive unit 102 can have an autofocus function, and different drive configurations can be achieved by using voice coil motors (VCMs), microelectromechanical systems (MEMS), piezoelectric systems, or shape memory alloys. The drive unit 102 is advantageous for achieving better image positioning of the lens unit 101, enabling the lens unit 101 to capture a clear image of the object at varying object distances. The image sensor 103 (e.g., CCD or CMOS), which can be characterized by high light sensitivity and low noise, is positioned on the image surface of the optical lens assembly for photography to achieve higher image quality.

[0215] The image stabilizer 104, for example an accelerometer, a gyroscope, and a Hall-effect sensor, is designed to work in conjunction with the drive unit 102 to achieve optical image stabilization (OIS). The drive unit 102, working in conjunction with the image stabilizer 104, is advantageous for compensating for panning and tilting movements of the lens unit 101, thereby reducing motion blur during exposure. In some cases, this compensation can be achieved through electronic image stabilization (EIS) using image processing software, which improves image quality in motion or low-light conditions. 12. Design

[0216] Fig. Figure 22 is a perspective view of an electronic device according to the 12th embodiment of the present disclosure. Fig.Figure 23 is another perspective view of the electronic device in Fig. 22.

[0217] In this embodiment, an electronic device 200 is a smartphone comprising the image acquisition unit 100, an image acquisition unit 100a, an image acquisition unit 100b, an image acquisition unit 100c, and a display unit 201 disclosed in the 11th embodiment. As in Fig. As shown in Figure 22, the image acquisition unit 100, the image acquisition unit 100a, and the image acquisition unit 100b are arranged on the same side of the electronic device 200 and point in the same direction, and each of the image acquisition units 100, 100a, and 100b has a single focal point. As shown in Fig.As shown in Figure 23, the image acquisition unit 100c and the display unit 201 are arranged on the opposite side of the electronic device 200, so that the image acquisition unit 100c can be a front camera of the electronic device 200 for taking selfies, but the present disclosure is not limited to this. Furthermore, each of the image acquisition units 100a, 100b, and 100c can comprise the optical lens assembly for photography of the present disclosure and have a similar configuration to the image acquisition unit 100. In particular, each of the image acquisition units 100a, 100b, and 100c can comprise a lens unit, a drive device, an image sensor, and an image stabilizer, and each of the lens units can comprise an optical lens assembly for photography, such as the optical lens assembly of the present disclosure, a tube, and a holder for holding the optical lens assembly for photography.

[0218] Image capture unit 100 is a telephoto image capture unit, image capture unit 100a is a wide-angle image capture unit, image capture unit 100b is an ultra-wide-angle image capture unit, and image capture unit 100c is a wide-angle image capture unit. In this embodiment, image capture units 100, 100a, and 100b have different fields of view, allowing the electronic device to have 200 different magnification ratios to meet the requirements of the optical zoom function. Furthermore, image capture unit 100c, as shown in Fig.As shown in Figure 23, the image acquisition unit 100c has a non-circular opening, and the tube or lens elements in the image acquisition unit 100c may have one or more clipped edges at the outer diameter positions thereof to conform to the non-circular opening. Therefore, it is advantageous to further reduce the length of the image acquisition unit 100c along a single axis, thereby reducing the overall size of the lens, increasing the area ratio of the display unit 201 to the electronic device 200, reducing the thickness of the electronic device 200, and achieving overall module compactness. In this embodiment, the electronic device 200 comprises several image acquisition units 100, 100a, 100b, and 100c, but the present disclosure is not limited to the number and arrangement of the image acquisition units. 13. Design

[0219] Fig.Figure 24 is a perspective view of an electronic device according to the 13th embodiment of the present disclosure. Fig. Figure 25 is another perspective view of the electronic device in Fig. 24. Fig. 26 is a block diagram of the electronic device in Fig. 24.

[0220] In this embodiment, an electronic device 300 is a smartphone comprising the image acquisition unit 100, an image acquisition unit 100d, an image acquisition unit 100e, an image acquisition unit 100f, an image acquisition unit 100g, a flash module 301, a focusing aid module 302, an image signal processor 303, a display module 304, and an image software processor 305, as disclosed in the 11th embodiment. The image acquisition unit 100 and the image acquisition unit 100d are arranged on the same side of the electronic device 300. The focusing aid module 302 can be a laser distance meter or a ToF (Time of Flight) module, but the present disclosure is not limited to this.The image acquisition unit 100e, the image acquisition unit 100f, the image acquisition unit 100g, and the display module 304 are arranged on the opposite side of the electronic device 300, and the display module 304 can be a user interface, so that the image acquisition units 100e, 100f, and 100g can be front cameras of the electronic device 300 for taking selfies, but the present disclosure is not limited to this. Furthermore, each of the image acquisition units 100d, 100e, 100f, and 100g can include the optical lens assembly for photography of the present disclosure and have a similar configuration to the image acquisition unit 100.Specifically, each of the image acquisition units 100d, 100e, 100f and 100g can comprise a lens unit, a drive device, an image sensor and an image stabilizer, and each of the lens units can comprise an optical lens assembly for photography, such as the optical lens assembly for photography of the present disclosure, a tube and a holding element for holding the optical lens assembly for photography.

[0221] Image acquisition unit 100 is a telephoto image acquisition unit, image acquisition unit 100d is a wide-angle image acquisition unit, image acquisition unit 100e is a wide-angle image acquisition unit, image acquisition unit 100f is an ultra-wide-angle image acquisition unit, and image acquisition unit 100g is a time-of-flight (ToF) image acquisition unit. In this embodiment, image acquisition units 100 and 100d have different fields of view, so that the electronic device 300 can have different magnification ratios to meet the requirements of the optical zoom function. In addition, image acquisition unit 100g can determine depth information of the imaged object. In this embodiment, the electronic device 300 comprises multiple image acquisition units 100, 100d, 100e, 100f, and 100g, but the present disclosure is not limited to the number and arrangement of the image acquisition units.

[0222] When a user takes pictures of an object 306, the light beams are focused in the image acquisition unit 100 or the image acquisition unit 100d to produce images, and the flash module 301 is activated for light support. The focus assist module 302 detects the distance of the imaged object 306 to achieve fast autofocus. The image signal processor 303 is designed to optimize the captured image to improve image quality. The light beam emitted by the focus assist module 302 can be either conventional infrared light or laser light. Furthermore, the light beams can be focused in the image acquisition unit 100e, 100f, or 100g to produce images. The display module 304 can include a touchscreen, and the user can interact with the display module 304 and the multi-functional image software processor 305 to capture images and perform image processing.Alternatively, the user can take pictures using a physical button. The image processed by the 305 image software processor can be displayed on the 304 display module. 14. Design

[0223] Fig. Figure 27 is a perspective view of an electronic device according to the 14th embodiment of the present disclosure.

[0224] In this embodiment, an electronic device 400 is a smartphone comprising the image acquisition unit 100, an image acquisition unit 100h, an image acquisition unit 100i, a flash module 401, a focusing aid module, an image signal processor, a display module, and an image software processor (not shown) disclosed in the 11th embodiment. The image acquisition unit 100, the image acquisition unit 100h, and the image acquisition unit 100i are arranged on the same side of the electronic device 400, while the display module is arranged on the opposite side of the electronic device 400. Furthermore, each of the image acquisition units 100h and 100i can include the optical lens assembly for photography of the present disclosure and have a similar configuration to that of the image acquisition unit 100, the details of which are not specified again here.

[0225] The image acquisition unit 100 is a telephoto image acquisition unit, the image acquisition unit 100h is a wide-angle image acquisition unit, and the image acquisition unit 100i is an ultra-wide-angle image acquisition unit. In this embodiment, the image acquisition units 100, 100h, and 100i have different fields of view, so that the electronic device 400 can have different magnification ratios to meet the requirements of the optical zoom function. Furthermore, the image acquisition unit 100 can be a telephoto image acquisition unit with a light deflection element configuration, so that the overall path length of the image acquisition unit 100 is not limited by the thickness of the electronic device 400. Moreover, the light deflection element configuration of the image acquisition unit 100 can, for example, be that described in Fig. The structure shown in 33 may be similar, for which reference is made to the preceding descriptions. Fig.Reference can be made to Section 33, and the details relating thereto are not repeated. In this embodiment, the electronic device 400 comprises several image acquisition units 100, 100h, and 100i, but the present disclosure is not limited to the number and arrangement of the image acquisition units. When a user takes pictures of an object, light beams are focused in the image acquisition unit 100, 100h, or 100i to produce images, and the flash module 401 is activated to assist the lighting. Furthermore, the subsequent processes are carried out in a similar manner to those in the embodiment described above, so the details relating thereto are not repeated. 15. Design

[0226] Fig. Figure 28 is a perspective view of an electronic device according to the 15th embodiment of the present disclosure.

[0227] In this embodiment, an electronic device 500 is a smartphone comprising the image acquisition unit 100, an image acquisition unit 100j, an image acquisition unit 100k, an image acquisition unit 100m, an image acquisition unit 100n, an image acquisition unit 100p, an image acquisition unit 100q, an image acquisition unit 100r, an image acquisition unit 100s, a flash module 501, a focusing aid module, an image signal processor, a display module and an image software processor (not shown) disclosed in the 11th embodiment. The image acquisition units 100, 100j, 100k, 100m, 100n, 100p, 100q, 100r and 100s are arranged on the same side of the electronic device 500, while the display module is arranged on the opposite side of the electronic device 500.Furthermore, each of the image acquisition units 100j, 100k, 100m, 100n, 100p, 100q, 100r and 100s can comprise the optical lens assembly for photography of the present disclosure and have a similar configuration to the image acquisition unit 100, without the details relating thereto being specified again.

[0228] The image acquisition unit 100 is a telephoto image acquisition unit, the image acquisition unit 100j is a telephoto image acquisition unit, the image acquisition unit 100k is a wide-angle image acquisition unit, the image acquisition unit 100m is a wide-angle image acquisition unit, the image acquisition unit 100n is an ultra-wide-angle image acquisition unit, the image acquisition unit 100p is an ultra-wide-angle image acquisition unit, the image acquisition unit 100q is a telephoto image acquisition unit, the image acquisition unit 100r is a telephoto image acquisition unit, and the image acquisition unit 100s is a ToF image acquisition unit. In this embodiment, the image acquisition units 100, 100j, 100k, 100m, 100n, 100p, 100q and 100r have different fields of view, so that the electronic device can have 500 different magnification ratios to meet the requirements of the optical zoom function.Furthermore, each of the 100 and 100j image acquisition units can be a telephoto image acquisition unit with a light deflection element configuration. Moreover, the light deflection element configuration of each of the 100 and 100j image acquisition units can be, for example, the one described in [reference missing]. Fig. The structure shown in 33 may be similar, for which reference is made to the preceding descriptions. Fig.Reference can be made to Section 33, and the relevant details are not stated again. Additionally, the image acquisition unit 100s can determine depth information of the imaged object. In this embodiment, the electronic device 500 comprises multiple image acquisition units 100, 100j, 100k, 100m, 100n, 100p, 100q, 100r, and 100s, but the present disclosure is not limited to the number and arrangement of the image acquisition units. When a user takes pictures of an object, the light rays are focused in the image acquisition unit 100, 100j, 100k, 100m, 100n, 100p, 100q, 100r, or 100s to produce images, and the flash module 501 is activated to assist the lighting. Furthermore, the subsequent processes are carried out in a similar manner to those in the embodiments mentioned above, and the details relating thereto are not specified again. 16. Design

[0229] Fig.Figure 29 is a perspective view of an electronic device according to the 16th embodiment of the present disclosure. Fig. Figure 30 is a side view of the electronic device in Fig. 29. Fig. 31 is a top view of the electronic device in Fig. 29.

[0230] In this embodiment, an electronic device 600 is a mobile vehicle, for example, a car. The electronic device 600 comprises a plurality of image acquisition units 601, and each of the image acquisition units 601 comprises, for example, the optical lens assembly for photography as described in this disclosure. The image acquisition units 601 can, for example, serve as panoramic car cameras, dashboard cameras, and vehicle reversing cameras. The image acquisition units 601 can be wide-angle image acquisition units.

[0231] As in Fig. 29 to Fig.As shown in Figure 31, the image acquisition units 601 are, for example, positioned at the front, rear, sides, inside, or rearview mirror of the car to capture peripheral images of the vehicle. This is advantageous for capturing external traffic information to achieve advanced driver assistance functionality. Furthermore, the image software processor can stitch the peripheral images together to create a panoramic image, allowing the driver to check every corner around the car, thus facilitating parking and driving.

[0232] As in Fig. As shown in Figure 30, the image acquisition units 601, for example, are arranged on the lower part of the side mirrors to capture image information of the left and right lanes. As shown in Fig.As shown in Figure 31, the image acquisition units 601 can, for example, also be arranged on the lower part of the side mirrors and within the front and rear windshields to provide the driver with external information and a wider field of view, thereby reducing blind spots and improving driving safety. It should be noted that the arrangement of the image acquisition units 601 in the drawings is only exemplary, and the number, positions, and image acquisition directions of the image acquisition units 601 can be adapted according to actual requirements.

[0233] The smartphone and the mobile vehicle in various embodiments serve only as examples to illustrate the image acquisition unit installed in an electronic device according to the present disclosure, and the present disclosure is not limited to them. The image acquisition unit can optionally be applied to optical systems with a moving focus. Furthermore, the optical lens assembly for photographing the image acquisition unit is characterized by good aberration and high image quality and can be used for 3D image acquisition applications (three-dimensional image acquisition applications) in products such as digital cameras, mobile devices, digital tablets, smart televisions, network surveillance devices, dashboard cameras, vehicle reversing cameras, multi-camera devices, image recognition systems, motion sensor input devices, portable devices, and other electronic imaging devices.

[0234] The foregoing description has been provided for illustrative purposes with reference to specific embodiments and their respective data. It should be noted that TABLES 1A-10C show different data for the various embodiments; however, these data were obtained experimentally. The embodiments were selected and described to best illustrate the principles of the disclosure and their practical applications, so that other skilled persons may make the best possible use of the disclosure and of the various embodiments with different modifications suitable for their respective intended uses. The embodiments shown above and the accompanying drawings are examples only and are not intended to be exhaustive, nor are they intended to limit the scope of this disclosure to the forms specifically disclosed.Given the above teachings, many modifications and variations are possible.

Claims

[1] Optical lens assembly for photography comprising seven lens elements (E1, E2, E3, E4, E5, E6, E7), wherein the seven lens elements (E1, E2, E3, E4, E5, E6, E7) are arranged in sequence from an object side to an image side along a ray path as a first lens element (E1), a second lens element (E2), a third lens element (E3), a fourth lens element (E4), a fifth lens element (E5), a sixth lens element (E6) and a seventh lens element (E7), and wherein each of the seven lens elements (E1, E2, E3, E4, E5, E6, E7) has an object-side surface facing the object side and an image-side surface facing the image side; wherein the object-side surface of the second lens element (E2) is convex in a paraxial region thereof, the image-side surface of the second lens element (E2) is concave in a paraxial region thereof, the fifth lens element (E5) has a positive refractive power, the seventh lens element (E7) has a negative refractive power and the object-side surface of the seventh lens element (E7) is concave in a paraxial region thereof; wherein the optical lens assembly for photography further comprises an aperture diaphragm (ST) arranged between the second lens element (E2) and the third lens element (E3); where f is the focal length of the optical lens assembly for photography, f is the focal length of the third lens element (E3), f3 is the combined focal length of the first lens element (E1) and the second lens element (E2), f12 is the central thickness of the first lens element (E1), CT1 is the central thickness of the second lens element (E2), CT2 is the central thickness of the seventh lens element (E7), CT7 is the radius of curvature of the image-side surface of the sixth lens element (E6), R12 is the radius of curvature of the object-side surface of the seventh lens element (E7), and the following conditions are met: 3.20 <f / CT1<6,50; -0.65 <R13 / |R12|<0; 0<|f3 / f12|<0.45; and and 0 <CT7 / CT2<0,85. [2] Optical lens assembly for photography according to claim 1, wherein the object-side surface of the first lens element (E1) is convex in a paraxial region thereof and the object-side surface of the fifth lens element (E5) is convex in a paraxial region thereof; where a radius of curvature of the object-side surface of the third lens element (E3) is R5, a radius of curvature of the image-side surface of the third lens element (E3) is R6 and the following condition is satisfied: 0≤|R5+R6| / |R5−R6|<0.

50. [3] Optical lens assembly for photography according to claim 1, wherein the central thickness of the first lens element (E1) is CT1, the central thickness of the seventh lens element (E7) is CT7, an axial distance between the fifth lens element (E5) and the sixth lens element (E6) is T56, an axial distance between the sixth lens element (E6) and the seventh lens element (E7) is T67, the focal length of the optical lens assembly for photography is f, and the following conditions are met: 0 <CT7 / (T56+T67)<0,60; and 3.50 <f / CT1<5,80. [4] Optical lens assembly for photography according to claim 1, wherein an axial distance between the aperture diaphragm (ST) and an image surface (IMG) is SL, an axial distance between the object-side surface of the first lens element (E1) and the image surface (IMG) is TL, the radius of curvature of the image-side surface of the sixth lens element (E6) is R12, the radius of curvature of the object-side surface of the seventh lens element (E7) is R13 and the following conditions are met: 0.60 <SL / TL<0,80; and -0.60 <R13 / |R12|<0. [5] Optical lens assembly for photography according to claim 1, wherein an axial distance between the second lens element (E2) and the third lens element (E3) is T23, the central thickness of the second lens element (E2) is CT2, the focal length of the third lens element (E3) is f3, the combined focal length of the first lens element (E1) and the second lens element (E2) is f12 and the following conditions are met: 0.50 <T23 / CT2<2,80; and 0<|f2 / f12|<0,30. [6] Optical lens assembly for photography according to claim 1, wherein the focal length of the optical lens assembly for photography is f, the focal length of the seventh lens element (E7) is f7, the central thickness of the second lens element (E2) is CT2, the central thickness of the seventh lens element (E7) is CT7 and the following conditions are met: -2.00 <f / f7<−0,65; and 0.10 <CT7 / CT2<0,80. [7] Optical lens assembly for photography according to claim 1, wherein a radius of curvature of the image-side surface of the second lens element (E2) is R4, the focal length of the optical lens assembly for photography is f, a central thickness of the fifth lens element (E5) is CT5, a central thickness of the sixth lens element (E6) is CT6 and the following conditions are met: 0.25 <R4 / f<1,40; and 0.30 <CT6 / CT5<1,25. [8] Optical lens assembly for photography according to claim 1, wherein the third lens element (E3) and the fourth lens element (E4) are a set of cemented lens elements, one of the third lens element (E3) and the fourth lens element (E4) is a positive lens element and another of the third lens element (E3) and the fourth lens element (E4) is a negative lens element; where the central thickness of the negative lens element is CTn, the central thickness of the second lens element (E2) is CT2, and the following condition is met: 0.10 <CTn / CT2<0,55. [9] Optical lens assembly for photography according to claim 1, wherein an Abbe number of the first lens element (E1) is V1, an Abbe number of the second lens element (E2) is V2 and the following condition is satisfied: -31.5 <V2−V1<18,0. [10] Optical lens assembly for photography according to claim 1, wherein a distance parallel to an optical axis between a position of the maximum effective radius of the object-side surface of the fifth lens element (E5) and a position of the maximum effective radius of the image-side surface of the fifth lens element (E5) is ET5, a distance parallel to the optical axis between a position of the maximum effective radius of the object-side surface of the seventh lens element (E7) and a position of the maximum effective radius of the image-side surface of the seventh lens element (E7) is ET7, a maximum effective radius of the object-side surface of the first lens element (E1) is Y1R1, a maximum image height of the optical lens assembly for photography is ImgH, and the following conditions are met: 0.40 <ET7 / ET5<2,20; and 1.00 <Y1R1 / ImgH<2,10. [11] Optical lens assembly for photography according to claim 1, wherein a maximum effective radius of the image-side surface of the fourth lens element (E4) is Y4R2, a maximum effective radius of the object-side surface of the fifth lens element (E5) is Y5R1, a maximum effective radius of the image-side surface of the fifth lens element (E5) is Y5R2 and the following condition is met: −1.00<(Y5R1−Y5R2) / (Y5R1−Y5R2)<1.

00. [12] Image capture unit (100), comprising: the optical lens assembly for photography according to claim 1; and an image sensor (103) which is arranged on an image surface (IMG) of the optical lens assembly for photography. [13] Optical lens assembly for photography comprising seven lens elements (E1, E2, E3, E4, E5, E6, E7), wherein the seven lens elements (E1, E2, E3, E4, E5, E6, E7) are arranged in sequence from an object side to an image side along a ray path, a first lens element (E1), a second lens element (E2), a third lens element (E3), a fourth lens element (E4), a fifth lens element (E5), a sixth lens element (E6) and a seventh lens element (E7), and wherein each of the seven lens elements (E1, E2, E3, E4, E5, E6, E7) has an object-side surface facing the object side and an image-side surface facing the image side; wherein the object-side surface of the first lens element (E1) is convex in a paraxial region thereof, the object-side surface of the second lens element (E2) is convex in a paraxial region thereof, the image-side surface of the second lens element (E2) is concave in a paraxial region thereof, the fifth lens element (E5) has a positive refractive power, the seventh lens element (E7) has a negative refractive power, and the object-side surface of the seventh lens element (E7) is concave in a paraxial region thereof; wherein the optical lens assembly for photography further comprises an aperture diaphragm (ST) arranged between the second lens element (E2) and the third lens element (E3); where f is the focal length of the optical lens assembly for photography, CT1 is the central thickness of the first lens element (E1), R4 is the radius of curvature of the image-side surface of the second lens element (E2), R12 is the radius of curvature of the image-side surface of the sixth lens element (E6), R13 is the radius of curvature of the object-side surface of the seventh lens element (E7), TD is the axial distance between the object-side surface of the first lens element (E1) and the image-side surface of the seventh lens element (E7), and the following conditions are met: 3.20 <f / CT1<6,50; -0.65 <R13 / |R12|<0; 0.10 <R4 / f<1,80; and 1.25 <TD / f<2,50. [14] Optical lens assembly for photography according to claim 13, wherein the object-side surface of the fifth lens element (E5) is convex in a paraxial region thereof and both the object-side surface and the image-side surface of at least two of all lens elements of the optical lens assembly for photography are spherical; where the radius of curvature of the image-side surface of the third lens element (E3) is R6, the radius of curvature of the object-side surface of the fourth lens element (E4) is R7, and the following condition is met: 0.60 <R6 / R7<1,30. [15] Optical lens assembly for photography according to claim 13, wherein the focal length of the optical lens assembly for photography is f, the central thickness of the first lens element (E1) is CT1 and the following condition is met: 3.60 <f / CT1<5,70. [16] Optical lens assembly for photography according to claim 13, wherein an Abbe number of the first lens element (E1) is V1, an Abbe number of the second lens element (E2) is V2 and the following condition is met: -30.5 <V2−V1<17,5. [17] Optical lens assembly for photography according to claim 13, wherein the focal length of the optical lens assembly for photography is f, the focal length of the third lens element (E3) is f3, a composite focal length of the first lens element (E1) and the second lens element (E2) is f12, the radius of curvature of the image-side surface of the second lens element (E2) is R4, and the following conditions are met: 0<|f3 / f12|<0.40; and 0.20 <R4 / f<1,60. [18] Optical lens assembly for photography according to claim 13, wherein an axial distance between the second lens element (E2) and the third lens element (E3) is T23, a central thickness of the second lens element (E2) is CT2, the axial distance between the object-side surface of the first lens element (E1) and the image-side surface of the seventh lens element (E7) is TD, the focal length of the optical lens assembly for photography is f and the following conditions are met: 0.55 <T23 / CT2<2,60; and 1.40 <TD / f<2,20. [19] Optical lens assembly for photography according to claim 13, wherein the central thickness of the first lens element (E1) is CT1, the central thickness of the third lens element (E3) is CT3, the refractive index of the sixth lens element (E6) is N6 and the following conditions are met: 0 <CT3 / CT1<0,80; and 1.690≤N6. [20] Optical lens assembly for photography according to claim 13, wherein at least three of all lens elements of the optical lens assembly for photography are made of glass material, where the focal length of the optical lens assembly for photography is f, the focal length of the fifth lens element (E5) is f5 and the following condition is met: 0.40 <f / f5<1,80. [21] Optical lens assembly for photography according to claim 13, wherein a central thickness of the fifth lens element (E5) is CT5, a central thickness of the sixth lens element (E6) is CT6, the focal length of the optical lens assembly for photography is f, the focal length of the third lens element (E3) is f3 and the following conditions are met: 0.25 <CT6 / CT5<1,35 and 0,10<|f3 / f|<1,10. [22] Optical lens assembly for photography according to claim 13, wherein a radius of curvature of the object-side surface of the fourth lens element (E4) is R7, a radius of curvature of the image-side surface of the fourth lens element (E4) is R8 and the following condition is met: −1.00<(R7+R8) / (R7−R8)<0.

40. [23] Optical lens assembly according to claim 13, wherein a displacement parallel to an optical axis from an axial vertex on the object-side surface of the seventh lens element (E7) to a position of the maximum effective radius on the object-side surface of the seventh lens element (E7) is SAG7R1, the central thickness of the first lens element (E1) is CT1, a central thickness of the second lens element (E2) is CT2, a central thickness of the seventh lens element (E7) is CT7, and a distance parallel to the optical axis between a position of the maximum effective radius of the object-side surface of the first lens element (E1) and a position of the maximum effective radius of the image-side surface of the first lens element (E1) is ET1.a distance parallel to the optical axis between a position of the maximum effective radius of the object-side surface of the second lens element (E2) and a position of the maximum effective radius of the image-side surface of the second lens element (E2) ET2, and the following conditions are met:, -2.80 <SAG7R1 / CT7−0,10; and 1.50 <CT1 / ET1+ET2 / CT2<4,00. [24] Optical lens assembly for photography according to claim 13, wherein the focal length of the optical lens assembly for photography is f, the focal length of the third lens element (E3) is f3, a composite focal length of the first lens element (E1) and the second lens element (E2) is f12, the central thickness of the first lens element (E1) is CT1, a central thickness of the second lens element (E2) is CT2, a central thickness of the seventh lens element (E7) is CT7, the radius of curvature of the image-side surface of the second lens element (E2) is R4, the radius of curvature of the image-side surface of the sixth lens element (E6) is R12, the radius of curvature of the object-side surface of the seventh lens element (E7) is R13, the axial distance between the object-side surface of the first lens element (E1) and the image-side surface of the seventh lens element (E7) TD is and the following conditions are met: 3.86≤f / CT1≤6.13; −0.55≤R13 / |R12|≤0.03; 0.002≤|f3 / f12|≤0.21; 0.30≤CT7 / CT2≤0.75; 0.43≤R4 / f≤1.29; and 1.48≤TD / f≤2.

01. [25] Electronic device (200), comprising: one image acquisition unit (100), comprising: the optical lens assembly for photography according to claim 13; and an image sensor (103) which is arranged on an image surface (IMG) of the optical lens assembly for photography.

Images