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

Abstract

Optical lens assembly for photography, comprising six optical elements (E1, E2, E3, E4, E5 and E6), wherein the six optical elements (E1, E2, E3, E4, E5 and E6) are, in order from an object side to an image side along an optical path, a first optical element (E1), a second optical element (E2), a third optical element (E3), a fourth optical element (E4), a fifth optical element (E5) and a sixth optical element (E6), and each of the six optical elements (E1, E2, E3, E4, E5 and E6) has an object-side surface facing towards the object side and an image-side surface facing towards the image side; where the first optical element (E1) has a positive refractive power, the object-side surface of the first optical element (E1) is convex in a paraxial region thereof, the fourth optical element (E4) has a positive refractive power, and the object-side surface of the fourth optical element (E4) is convex in a paraxial region thereof; where a central thickness of the first optical element (E1) is CT1, a central thickness of the second optical element (E2) is CT2, a central thickness of the third optical element (E3) is CT3, a central thickness of the fourth optical element (E4) is CT4, a central thickness of the fifth optical element (E5) is CT5, a central thickness of the sixth optical element (E6) is CT6, a focal length of the optical lens assembly for photography is f, a focal length of the first optical element (E1) is f1, a curvature radius of the object-side surface of the second optical element (E2) is R3, a curvature radius of the image-side surface of the sixth optical element (E6) is R12, and the following conditions are satisfied: 0.45 < (CT2 + CT3 + CT4 + CT5 + CT6) / CT1 < 1.55; 0.00 < f / f1 < 1.00; and −10.00 < (R3 + R12) / (R3 − R12) < −1.30.

Description

BACKGROUNDTechnical Field

[0001] The present disclosure relates to an optical lens assembly for photography, an image capturing unit, and an electronic device, particularly an optical lens assembly for photography and an image capturing unit that can be used in an electronic device. Description of the Related Art

[0002] With the progress of semiconductor manufacturing technology, the performance of image sensors has improved, enabling smaller pixel sizes. As a result, optical systems with high image quality have become an essential component.

[0003] As technology develops rapidly, the application scope of electronic devices equipped with optical systems has expanded, and the requirements for optical systems have become more diverse. In the past, it was a challenge for conventional optical systems to balance the requirements for image quality, sensitivity, aperture size, system volume, and field of view. Therefore, the present disclosure provides an optical system that meets these requirements. SUMMARY

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

[0005] Preferably, the first optical element has a positive refractive power. Preferably, the object-side surface of the first optical element is convex in a paraxial region thereof. Preferably, the fourth optical element has a positive refractive power. Preferably, the object-side surface of the fourth optical element is convex in a paraxial region thereof.

[0006] If a central thickness of the first optical element is CT1, a central thickness of the second optical element is CT2, a central thickness of the third optical element is CT3, a central thickness of the fourth optical element is CT4, a central thickness of the fifth optical element is CT5, a central thickness of the sixth optical element is CT6, a focal length of the optical lens assembly for photography is f, a focal length of the first optical element is f1, a curvature radius of the object-side surface of the second optical element is R3, and a curvature radius of the image-side surface of the sixth optical element is R12, the following conditions are preferably satisfied: 0.45 < (CT2 + CT3 + CT4 + CT5 + CT6) / CT1 < 1.55; 0.00 < f / f1 < 1.00; and −10.00 < (R3 + R12) / (R3 − R12) < −1.30.

[0007] According to a further aspect of the present disclosure, an optical lens assembly for photography includes six optical elements. The six optical elements are, in order from an object side to an image side along a light path, a first optical element, a second optical element, a third optical element, a fourth optical element, a fifth optical element, and a sixth optical element. Each of the six optical elements has an object-side surface facing the object side and an image-side surface facing the image side.

[0008] Preferably, the first optical element has a positive refractive power. Preferably, the object-side surface of the first optical element is convex in a paraxial region thereof. Preferably, the fourth optical element has a positive refractive power. Preferably, the object-side surface of the fourth optical element is convex in a paraxial region thereof.

[0009] If a central thickness of the first optical element is CT1, a central thickness of the second optical element is CT2, a central thickness of the third optical element is CT3, a central thickness of the fourth optical element is CT4, a central thickness of the fifth optical element is CT5, a central thickness of the sixth optical element is CT6, a focal length of the optical lens assembly for photography is f, a focal length of the first optical element is f1, a combined focal length of the fifth optical element and the sixth optical element is f56, a curvature radius of the image-side surface of the first optical element is R2, and a curvature radius of the object-side surface of the fourth optical element is R7, the following conditions are preferably satisfied: 0.40 < (CT2 + CT3 + CT4 + CT5 + CT6) / CT1 < 1.60; 0.00 < f / f1 < 0.90; −3.00 < f / f56 < 0.65; and 0.00 < |R7 / R2| < 0.80.

[0010] According to a further aspect of the present disclosure, an image capturing unit includes 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.

[0011] According to a further aspect of the present disclosure, an electronic device includes at least two image capturing units arranged on the same side of the electronic device, the at least two image capturing units including a first image capturing unit and a second image capturing unit. The first image capturing unit includes one of the above-mentioned optical lens assemblies for photographing and an image sensor arranged on an image surface of the optical lens assembly for photographing. The second image capturing unit includes an optical lens assembly and an image sensor arranged on an image surface of the optical lens assembly.

[0012] Preferably, a maximum viewing angle of the first image capturing unit and a maximum viewing angle of the second image capturing unit differ by more than 30 degrees. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The disclosure can be better understood by reading the following detailed description of the embodiments with reference to the accompanying drawings: Fig. 1 is a schematic cross-sectional view of an image acquisition unit according to the first embodiment of the present disclosure, corresponding to a diagonal direction of an effective light-sensitive area of an image sensor; Fig. 2 is a schematic cross-sectional view of the image acquisition unit according to the first embodiment of the present disclosure, corresponding to a short side direction of the effective light-sensitive area of the image sensor, with a light path deflected by a first optical element; Fig. 3 shows spherical aberration curves, astigmatic field curves, and a distortion curve of the image acquisition unit according to the first embodiment; Fig.4 is a schematic cross-sectional view of an image capturing unit according to the second embodiment of the present disclosure, corresponding to a diagonal direction of an effective light-sensitive area of an image sensor; Fig. 5 is a schematic cross-sectional view of the image capturing unit according to the second embodiment of the present disclosure, corresponding to a short side direction of the effective light-sensitive area of the image sensor, with a light path deflected by a first optical element; Fig. 6 shows spherical aberration curves, astigmatic field curves, and a distortion curve of the image capturing unit according to the second embodiment; Fig.7 is a schematic cross-sectional view of an image acquisition unit according to the third embodiment of the present disclosure, corresponding to a diagonal direction of an effective light-sensitive area of an image sensor; Fig. 8 is a schematic cross-sectional view of the image acquisition unit according to the third embodiment of the present disclosure, corresponding to a short side direction of the effective light-sensitive area of the image sensor, with a light path deflected by a first optical element; Fig. 9 shows spherical aberration curves, astigmatic field curves, and a distortion curve of the image acquisition unit according to the third embodiment; Fig.10 is a schematic cross-sectional view of an image capturing unit according to the fourth embodiment of the present disclosure, corresponding to a diagonal direction of an effective light-sensitive area of an image sensor; Fig. 11 is a schematic cross-sectional view of the image capturing unit according to the fourth embodiment of the present disclosure, corresponding to a short side direction of the effective light-sensitive area of the image sensor, with a light path deflected by a first optical element; Fig. 12 shows spherical aberration curves, astigmatic field curves, and a distortion curve of the image capturing unit according to the fourth embodiment; Fig.13 is a schematic cross-sectional view of an image capturing unit according to the fifth embodiment of the present disclosure, corresponding to a diagonal direction of an effective light-sensitive area of an image sensor; Fig. 14 is a schematic cross-sectional view of the image capturing unit according to the fifth embodiment of the present disclosure, corresponding to a short side direction of the effective light-sensitive area of the image sensor, with a light path deflected by a first optical element; Fig. 15 shows spherical aberration curves, astigmatic field curves, and a distortion curve of the image capturing unit according to the fifth embodiment; Fig.16 is a schematic cross-sectional view of an image capturing unit according to the sixth embodiment of the present disclosure, corresponding to a diagonal direction of an effective light-sensitive area of an image sensor; Fig. 17 is a schematic cross-sectional view of the image capturing unit according to the sixth embodiment of the present disclosure, corresponding to a short side direction of the effective light-sensitive area of the image sensor, with a light path deflected by a first optical element; Fig. 18 shows spherical aberration curves, astigmatic field curves, and a distortion curve of the image capturing unit according to the sixth embodiment; Fig.19 is a schematic cross-sectional view of an image capturing unit according to the seventh embodiment of the present disclosure, corresponding to a diagonal direction of an effective light-sensitive area of an image sensor; Fig. 20 is a schematic cross-sectional view of the image capturing unit according to the seventh embodiment of the present disclosure, corresponding to a short side direction of the effective light-sensitive area of the image sensor, with a light path deflected by a first optical element; Fig. 21 shows spherical aberration curves, astigmatic field curves, and a distortion curve of the image capturing unit according to the seventh embodiment; Fig.22 is a schematic cross-sectional view of an image capturing unit according to the eighth embodiment of the present disclosure, corresponding to a diagonal direction of an effective light-sensitive area of an image sensor; Fig. 23 is a schematic cross-sectional view of the image capturing unit according to the eighth embodiment of the present disclosure, corresponding to a short side direction of the effective light-sensitive area of the image sensor, with a light path deflected by a first optical element; Fig. 24 shows spherical aberration curves, astigmatic field curves, and a distortion curve of the image capturing unit according to the eighth embodiment; Fig.25 is a schematic cross-sectional view of an image capturing unit according to the ninth embodiment of the present disclosure, corresponding to a diagonal direction of an effective light-sensitive area of an image sensor; Fig. 26 is a schematic cross-sectional view of the image capturing unit according to the ninth embodiment of the present disclosure, corresponding to a short side direction of the effective light-sensitive area of the image sensor, with a light path deflected by a first optical element; Fig. 27 shows spherical aberration curves, astigmatic field curves, and a distortion curve of the image capturing unit according to the ninth embodiment; Fig.28 is a schematic cross-sectional view of an image capturing unit according to the tenth embodiment of the present disclosure, corresponding to a diagonal direction of an effective light-sensitive area of an image sensor; Fig. 29 is a schematic cross-sectional view of the image capturing unit according to the tenth embodiment of the present disclosure, corresponding to a short side direction of the effective light-sensitive area of the image sensor, with a light path deflected by a first optical element; Fig. 30 shows spherical aberration curves, astigmatic field curves, and a distortion curve of the image capturing unit according to the tenth embodiment; Fig. 31 is a perspective view of an image capturing unit according to the eleventh embodiment of the present disclosure; Fig.32 is a perspective view of an electronic device according to the twelfth embodiment of the present disclosure; Fig. 33 is another perspective view of the electronic device in Fig. 32; Fig. 34 is a block diagram of the electronic device in Fig. 32; Fig. 35 is a schematic view of an electronic device according to the thirteenth embodiment of the present disclosure; Fig. 36 is another schematic view of the electronic device in Fig. 35; Fig. 37 is a perspective view of an electronic device according to the fourteenth embodiment of the present disclosure; Fig. 38 shows a schematic view of turning points on surfaces of optical elements according to the first embodiment of the present disclosure; Fig.39 shows a schematic view of Y1R1, ET1, SAG1R1, SAG1R2, SAG5R1, SAG5R2, SAG6R2 and ImgH according to the first embodiment of the present disclosure; Fig. 40 shows a schematic view of P1TL according to the first embodiment of the present disclosure; Fig. 41 shows a schematic view of a shape configuration of an aperture stop of an optical lens assembly for photography according to an aspect of the present disclosure; Fig. 42 shows a schematic view of a shape configuration of an aperture stop of an optical lens assembly for photography according to a further aspect of the present disclosure; Fig.43 shows a schematic view of the entrance pupil diameter of the optical lens assembly for photography according to an aspect of the present disclosure, corresponding to the longitudinal axis direction, the short axis direction, and the maximum direction of the entrance pupil diameter of the aperture stop in Fig. 42; Fig. 44 shows a schematic view of the structure of a single optical element of an optical lens assembly for photography after edge cutting according to an aspect of the present disclosure; and Fig. 45 shows a schematic view of the structure of a single optical element of an optical lens assembly for photography after edge cutting according to a further aspect of the present disclosure. DETAILED DESCRIPTION

[0014] An optical lens assembly for photography includes six optical elements. The six optical elements are, in order from an object side to an image side along an optical path, a first optical element, a second optical element, a third optical element, a fourth optical element, a fifth optical element, and a sixth optical element. Each of the six optical elements of the optical lens assembly for photography has an object-side surface facing the object side and an image-side surface facing the image side.

[0015] The first optical element can have a positive refractive power. Therefore, it is advantageous to reduce the size of the optical lens assembly for photography and to control the shooting angle. The object-side surface of the first optical element can be convex in a paraxial region thereof. Therefore, it is advantageous to reduce the outer diameter of the optical lens assembly for photography. In addition, the first optical element can be, for example, a prism or a lens element.

[0016] The object-side surface of the second optical element can be convex in a paraxial region thereof. Therefore, it is advantageous to cooperate with the first optical element to correct aberrations such as spherical aberration.

[0017] The fourth optical element may have a positive refractive power. Therefore, it is advantageous to balance the refractive powers of the front and rear optical elements and to bundle light in order to achieve a balance between image quality and overall length. The object-side surface of the fourth optical element may be convex in a paraxial region thereof.

[0018] Therefore, it is advantageous to improve the ability of the fourth optical element to bundle light and thereby shorten the overall length of the photographic lens assembly.

[0019] The image-side surface of the sixth optical element may be concave in a paraxial region thereof. Therefore, it is advantageous to assist in balancing the rear focal length while correcting field curvature to improve image quality.

[0020] The first optical element can have a beam path deflection function. Therefore, it is advantageous to provide different beam path directions for the optical lens assembly for photography, whereby the lens has a more flexible space to achieve the telephoto effect of a long focal length. For example, the first optical element can be a prism.

[0021] At least one of the six optical elements of the optical lens assembly for photography can have at least one inflection point. Specifically, there can be one or more optical elements from the first optical element to the sixth optical element, each having at least one inflection point. An optical element with at least one inflection point means that at least one of the object-side surface and the image-side surface of the optical element has at least one inflection point. Therefore, it is advantageous for increasing the construction flexibility and reducing aberrations. Please refer to Fig. 38, which shows a schematic view of the inflection points P on the surfaces of the optical elements according to the first embodiment of the present disclosure. In Fig.38. The image-side surface of the first optical element E1, the object-side surface and the image-side surface of the second optical element E2, the image-side surface of the fourth optical element E4, the image-side surface of the fifth optical element E5, and the object-side surface of the sixth optical element E6 each have an inflection point P, and the image-side surface of the sixth optical element E6 has two reversal points P. The first embodiment shown in Fig. 38 of the present disclosure is only exemplary. Each of the optical elements in different embodiments of the present disclosure may have one or more reversal points.

[0022] If a central thickness of the first optical element is CT1, a central thickness of the second optical element is CT2, a central thickness of the third optical element is CT3, a central thickness of the fourth optical element is CT4, a central thickness of the fifth optical element is CT5, and a central thickness of the sixth optical element is CT6, the following condition can be satisfied: 0.40 < (CT2 + CT3 + CT4 + CT5 + CT6) / CT1 < 1.60. Therefore, it is advantageous to control the central thickness of the first optical element, whereby the first optical element can have a beam path deflection function while taking into account the manufacturing limitations of the first optical element. In addition, the following condition can also be satisfied: 0.45 < (CT2 + CT3 + CT4 + CT5 + CT6) / CT1 < 1.55. In addition, the following condition can also be satisfied: 0.55 < (CT2 + CT3 + CT4 + CT5 + CT6) / CT1 < 1.45.In addition, the following condition may also be satisfied: 0.78 ≤ (CT2 + CT3 + CT4 + CT5 + CT6) / CT1 ≤ 1.23.

[0023] If the focal length of the optical lens assembly for photography is f and the focal length of the first optical element is f1, the following condition may be satisfied: 0.00 < f / f1 < 1.00. Therefore, it is advantageous for controlling the degree of light beam bundling at the object-side end of the optical lens assembly for photography for forming a teleconfiguration. In addition, the following condition may also be satisfied: 0.00 < f / f1 < 0.90. In addition, the following condition may also be satisfied: 0.10 < f / f1 < 0.80. In addition, the following condition may also be satisfied: 0.33 ≤ f / f1 ≤ 0.64.

[0024] If the curvature radius of the object-side surface of the second optical element is R3 and the curvature radius of the image-side surface of the sixth optical element is R12, the following condition can be satisfied: -10.00 < (R3 + R12) / (R3 - R12) < -1.30. Therefore, it is advantageous to effectively balance the curvature radius of the object-side surface of the second optical element and the curvature radius of the image-side surface of the sixth optical element, in order to improve the light-gathering quality of the imaging light, and at the same time effectively correct field curvature and reduce spherical aberration. In addition, the following condition can also be satisfied: -9.00 < (R3 + R12) / (R3 - R12) < -1.40. In addition, the following condition can also be satisfied: -5.94 ≤ (R3 + R12) / (R3 - R12) ≤ -1.63.

[0025] If the focal length of the photographic optical lens unit is f and the combined focal length of the fifth optical element and the sixth optical element is f56, the following condition can be satisfied: -3.00 < f / f56 < -0.65. Therefore, it is advantageous for adjusting the bundling or splitting of light at the image-side end of the photographic optical lens unit, which facilitates the correction of distortion and field curvature. In addition, the following condition can also be satisfied: -2.60 < f / f56 < -0.80. In addition, the following condition can also be satisfied: -2.06 ≤ f / f56 ≤ -1.09.

[0026] If a curvature radius of the image-side surface of the first optical element is R2 and a curvature radius of the object-side surface of the fourth optical element is R7, the following condition can be satisfied: 0.00 ≤ |R7 / R2| < 0.80. Therefore, it is advantageous to effectively control the deflection angles of the light in the first optical element and in the fourth optical element to mutually compensate for the central spherical aberration. In addition, the following condition can also be satisfied: 0.00 ≤ |R7 / R2| < 0.60. In addition, the following condition can also be satisfied: 0.01 < |R7 / R2| < 0.40. In addition, the following condition can also be satisfied: 0.02 ≤ |R7 / R2| ≤ 0.18.

[0027] If half of the maximum viewing angle of the optical lens assembly for photography is HFOV, the following condition can be met: 8.0 degrees < HFOV < 20.0 degrees. Therefore, it is advantageous if the lens has a suitable viewing angle and facilitates the formation of a telescopic structure.

[0028] If the sum of the axial distances between each of the adjacent optical elements of the photographic optical lens assembly is ΣAT, the axial distance between the image-side surface of the sixth optical element and an image surface BL is, and the sum of the central thicknesses of all the optical elements of the photographic optical lens assembly is ΣCT, the following condition can be satisfied: 0.40 < (ΣAT + BL) / ΣCT < 1.60. Therefore, it is advantageous to compensate for the spatial configuration and ensure that the photographic optical lens assembly has a sufficient back focal length. In addition, the following condition can also be satisfied: 0.50 < (ΣAT + BL) / ΣCT < 1.40.

[0029] According to the present disclosure, the optical lens assembly for photography may further include an aperture diaphragm. Therefore, it is advantageous to control the shooting angle of the optical lens assembly for photography and ensure that the lens in the tele structure has a sufficient amount of incident light. In addition, the aperture diaphragm may have a major axis direction and a minor axis direction that are perpendicular to an optical axis and different from each other, and an effective radius of the aperture diaphragm in the major axis direction is different from an effective radius of the aperture diaphragm in the minor axis direction. Therefore, it is advantageous to adjust the shape of the aperture diaphragm so as to reduce stray light. See, for example Fig. 41 and Fig. 42, which show schematic views of non-circular aperture diaphragms according to some aspects of the present disclosure, wherein Fig.41 shows a schematic view of a shape configuration of an aperture diaphragm of an optical lens assembly for photography according to an aspect of the present disclosure, and Fig. 42 shows a schematic view of a shape configuration of an aperture diaphragm of an optical lens assembly for photography according to a further aspect of the present disclosure. As shown in Fig. 41, in some aspects of the present disclosure, the shape of the aperture diaphragm ST is elliptical, and the aperture diaphragm ST has a major axis direction LX and a minor axis direction SY perpendicular to an optical axis OA. The major axis direction LX and the minor axis direction SY are two different directions, and an effective radius Ra of the aperture diaphragm ST in the major axis direction LX is greater than an effective radius Rb of the aperture diaphragm ST in the minor axis direction SY. As shown in Fig.As shown in Fig. 42, in some aspects of the present disclosure, an aperture stop ST is shaped such that it has cut edges at an outer circumference thereof, and the aperture stop ST has a major axis direction LX and a minor axis direction SY perpendicular to an optical axis OA. The major axis direction LX and the minor axis direction SY are two different directions, and an effective radius Ra of the aperture stop ST in the major axis direction LX is greater than an effective radius Rb of the aperture stop ST in the minor axis direction SY.

[0030] If the focal length of the photographic optical lens unit is f and an entrance pupil diameter of the photographic optical lens unit, which corresponds to a maximum direction of the entrance pupil diameter of the aperture stop, is EPDmax, the following condition can be satisfied: 1.60 < f / EPDmax < 3.60. Therefore, in order to achieve a balance between illumination intensity and depth of sharpness, it is advantageous to improve the telephoto ability of the photographic optical lens unit. In addition, the following condition can also be satisfied: 1.80 < f / EPDmax < 3.30. In addition, f / EPDmax can denote a f-number of the photographic optical lens unit in the maximum direction of the entrance pupil diameter. See Fig. 43, which shows a schematic view of EPDmax according to an aspect of the present disclosure. In particular, it shows Fig.43 A schematic view of entrance pupil diameters of the optical lens assembly for photography according to an aspect of the present disclosure, which corresponds to a longitudinal axis direction LX, a short axis direction SY, and a maximum direction of the entrance pupil diameter of the aperture stop ST in Fig. 42 correspond. As in Fig. 43 shown, an entrance pupil diameter of the optical lens assembly for photography that corresponds to the longitudinal axis direction LX of the aperture stop ST is EPDx, an entrance pupil diameter of the optical lens assembly for photography that corresponds to the short axis direction SY of the aperture stop ST is EPDy, and an entrance pupil diameter of the optical lens assembly for photography that corresponds to a maximum direction of the entrance pupil diameter of the aperture stop ST is EPDmax.

[0031] If the focal length of the photographic optical lens unit is f and the combined focal length of the second optical element and the third optical element is f23, the following condition can be satisfied: -2.20 < f / f23 < 0.60. Therefore, it is advantageous to adjust the convergence or divergence of light at the object-side end of the photographic optical lens unit, thereby facilitating the correction of spherical aberration. In addition, the following condition can also be satisfied: -1.80 < f / f23 < 0.20.

[0032] If the focal length of the optical lens assembly for photography is f and the focal length of the fourth optical element is f4, the following condition can be satisfied: 0.03 < f4 / f < 1.80. Therefore, it is advantageous if the fourth optical element has a stronger positive refractive power to control the overall track length and at the same time to balance the overall refractive power distribution. In addition, the following condition can also be satisfied: 0.06 < f4 / f < 1.10. Furthermore, the following condition can also be satisfied: 0.15 < f4 / f < 0.90.

[0033] If the radius of curvature of the image-side surface of the first optical element is R2 and the radius of curvature of the object-side surface of the second optical element is R3, the following condition can be satisfied: 0.00 ≤ |R3 / R2| < 0.30. Therefore, it is advantageous if the image-side surface of the first optical element has a smaller curvature, which reduces the generation of spherical aberration and improves manufacturability. In addition, the following condition can also be satisfied: 0.00 ≤ |R3 / R2| < 0.25.

[0034] If the curvature radius of the object-side surface of the first optical element is R1 and the curvature radius of the object-side surface of the fourth optical element is R7, the following condition can be satisfied: 0.00 ≤ |R7 / R1| < 1.00. Therefore, it is advantageous if the shape of the object-side surface of the first optical element is matched to the shape of the object-side surface of the fourth optical element to adjust the ray path direction, thereby facilitating the formation of a long focal length configuration. In addition, the following condition can also be satisfied: 0.05 < |R7 / R1| < 0.80.

[0035] If the radius of curvature of the object-side surface of the fourth optical element is R7 and the radius of curvature of the object-side surface of the fifth optical element is R9, the following condition can be satisfied: -2.00 < (R7 + R9) / (R7 - R9) < 0.30. Therefore, it is advantageous if the shape of the object-side surface of the fourth optical element is matched to the shape of the object-side surface of the fifth optical element, thereby reducing aberrations across different viewing fields. In addition, the following condition can also be satisfied: -1.80 < (R7 + R9) / (R7 - R9) < 0.00.

[0036] If the Abbe number of the fifth optical element is V5 and the Abbe number of the sixth optical element is V6, the following condition can be satisfied: 0.90 < V5 / V6 < 5.00. Therefore, it is advantageous if the materials of the fifth optical element and the sixth optical element are matched to each other to correct chromatic aberration. In addition, the following condition can also be satisfied: 0.90 < V5 / V6 < 4.50.

[0037] If the refractive index of the fourth optical element is N4, the following condition can be satisfied: 1.450 < N4 < 1.580. Therefore, it is advantageous to adjust the refractive index of the fourth optical element in coordination with the front and rear optical elements to correct chromatic aberrations and image aberrations and thereby improve the image quality.

[0038] If the refractive index of the first optical element is N1, the following condition can be satisfied: 1,500 < N1 < 1,600. Therefore, it is advantageous to limit the material selection for the first optical element to align with the prism design and improve production efficiency.

[0039] When a shift parallel to the optical axis from an axial vertex point of the object-side surface of the first optical element to a position of the maximum effective radius of the object-side surface of the first optical element is SAG1R1, a shift parallel to the optical axis from an axial vertex point of the image-side surface of the first optical element to a position of the maximum effective radius of the image-side surface of the first optical element is SAG1R2, and a distance parallel to the optical axis between the position of the maximum effective radius of the object-side surface of the first optical element and the position of the maximum effective radius of the image-side surface of the first optical element is ET1, the following condition can be satisfied: -0.10 < (SAG1R1 + SAG1R2) / ET1 < 0.35.Therefore, it is advantageous to adjust the circumferential thickness and curvature of the first optical element to facilitate the formation of the optical element and thereby improve manufacturability. In addition, the following condition may also be satisfied: 0.00 < (SAG1 R1 + SAG1 R2) / ET1 < 0.30. See Fig. . Fig. 39, which shows a schematic view of SAG1R1 and SAG1R2 according to the first embodiment of the present disclosure. When the direction is from the axial vertex of a surface to the position of the maximum effective radius of the same surface towards the image side of the optical lens assembly for photography, the value of the displacement is positive; when the direction is from the axial vertex of the surface to the position of the maximum effective radius of the same surface towards the object side of the optical lens assembly for photography, the value of the displacement is negative.

[0040] If the radius of curvature of the image-side surface of the first optical element is R2, the radius of curvature of the object-side surface of the fourth optical element is R7, and the radius of curvature of the object-side surface of the fifth optical element is R9, the following condition can be satisfied: 0.01 < (|R7| + |R9|) / |R2| < 2.00. Therefore, this is advantageous for compensating the entire optical path of the photographic lens assembly, facilitating the correction of astigmatism and the reduction of stray light formation within the lens. Additionally, the following condition can also be satisfied: 0.03 < (|R7| + |R9|) / |R2| < 1.80.

[0041] If the curvature radius of the object-side surface of the fourth optical element is R7 and the curvature radius of the image-side surface of the sixth optical element is R12, the following condition can be satisfied: 1.60 < R12 / R7 < 8.00. Therefore, it is advantageous for reducing sensitivity and effectively correcting field curvature. In addition, the following condition can also be satisfied: 1.70 < R12 / R7 < 7.00.

[0042] If a maximum effective radius of the object-side surface of the first optical element is Y1R1 and a maximum image height of the optical lens assembly for photography (which can be half of a diagonal length of an effective light-sensitive area of an image sensor) is ImgH, the following condition can be satisfied: 0.80 < Y1R1 / ImgH < 1.60. Therefore, it is advantageous to effectively control the height difference between the first optical element and the image sensor to prevent the lens size from becoming too large. See Fig. 39, which shows a schematic view of Y1R1 and ImgH according to the first embodiment of the present disclosure.

[0043] If the central thickness of the first optical element is CT1 and the central thickness of the third optical element is CT3, the following condition can be satisfied: 0.10 < 10×CT3 / CT1 < 3.00. Therefore, it is advantageous to control the ratio between the central thickness of the first optical element and the central thickness of the third optical element to increase the design flexibility and reduce the manufacturing tolerances. Furthermore, the following condition can also be satisfied: 0.30 < 10×CT3 / CT1 < 2.50. Furthermore, the following condition can also be satisfied: 0.50 < 10×CT3 / CT1 < 2.00.

[0044] If the central thickness of the third optical element is CT3 and the focal length of the optical lens assembly for photography is f, the following condition can be satisfied: 0.15 < 10×CT3 / f < 0.60. Therefore, it is advantageous if the lens has a suitable focal length by adjusting the central thickness of the third optical element. In addition, the following condition can also be satisfied: 0.20 < 10×CT3 / f < 0.55.

[0045] If the refractive index of the second optical element is N2, the following condition can be satisfied: 1.420 < N2 < 1.620. Therefore, it is advantageous to adjust the refractive index of the second optical element in accordance with the front and rear optical elements to correct chromatic aberrations and image aberrations and thereby improve the image quality. In addition, the following condition can also be satisfied: 1.450 < N2 < 1.580.

[0046] If the focal length of the photographic optical lens unit is f, the focal length of the fifth optical element is f5, and the focal length of the sixth optical element is f6, the following condition can be satisfied: -2.50 < f / f5 + f / f6 < -0.80. Therefore, it is advantageous to balance the refractive power distribution of the photographic optical lens unit and simultaneously correct aberrations, thereby improving the image quality.

[0047] If the radius of curvature of the image-side surface of the fifth optical element is R10 and the focal length of the sixth optical element is f6, the following condition can be satisfied: -0.25 < R10 / f6 < 10.00. Therefore, it is advantageous for regulating the light path at the image-side end of the photographic optical lens unit to improve the light-gathering quality over the entire viewing field. In addition, the following condition can also be satisfied: -0.15 < R10 / f6 < 8.00.

[0048] If an axial distance between the second optical element and the third optical element is T23 and the central thickness of the second optical element is CT2, the following condition may be satisfied: 0.10 < T23 / CT2 < 0.80. Therefore, it is advantageous to effectively control the distance between the second optical element and the third optical element by the central thickness of the second optical element, thereby improving space utilization and increasing the assembly yield. In addition, the following condition may also be satisfied: 0.18 < T23 / CT2 < 0.70.

[0049] According to the present disclosure, the first optical element may have a reflective surface. If an axial distance between the reflective surface of the first optical element and the image surface P1TL, and an axial distance between the object-side surface of the first optical element and the image surface TL, the following condition may be satisfied: 0.70 < P1TL / TL < 0.95. Therefore, it is advantageous to effectively increase the flexibility of space utilization and reduce the overall path length. In addition, the following condition may also be satisfied: 0.78 < P1TL / TL < 0.90. See Fig. 40, which shows a schematic view of P1TL according to the first embodiment of the present disclosure. As shown in Fig. 40, the first optical element E1 has a reflective surface P1, and an axial distance between the reflective surface P1 and the image surface IMG is P1TL.

[0050] When a shift parallel to the optical axis from an axial vertex point of the object-side surface of the fifth optical element to a position of the maximum effective radius of the object-side surface of the fifth optical element is SAG5R1, a shift parallel to the optical axis from an axial vertex point of the image-side surface of the fifth optical element to a position of the maximum effective radius of the image-side surface of the fifth optical element is SAG5R2, and the central thickness of the fifth optical element is CT5, the following condition can be satisfied: -1.10 < (SAG5R1 + SAG5R2) / CT5 < 0.80. Therefore, it is advantageous for setting the peripheral curvature of the fifth optical element, which facilitates the correction of astigmatism and distortion. Furthermore, the following condition can also be satisfied: -0.90 < (SAG5R1 + SAG5R2) / CT5 < 0.60. See Fig.39, which shows a schematic view of SAG5R1 and SAG5R2 according to the first embodiment of the present disclosure. When the direction is from the axial apex of a surface to the position of the maximum effective radius of the same surface towards the image side of the optical lens assembly for photography, the value of the displacement is positive; when the direction is from the axial apex of the surface to the position of the maximum effective radius of the same surface towards the object side of the optical lens assembly for photography, the value of the displacement is negative.

[0051] When a shift parallel to the optical axis occurs from an axial vertex point of the image-side surface of the sixth optical element to a position of the maximum effective radius of the image-side surface of the sixth optical element SAG6R2, and the central thickness of the sixth optical element is CT6, the following condition can be satisfied: -0.50 < SAG6R2 / CT6 < 0.80. Therefore, for effective control of the peripheral curvature of the image-side surface of the sixth optical element, it is advantageous to adjust the incident angle of the light entering the image surface and improve the responsiveness of the image sensor. In addition, the following condition can also be satisfied: -0.40 < SAG6R2 / CT6 < 0.60. See Fig.39, which shows a schematic view of SAG6R2 according to the first embodiment of the present disclosure. When the direction is from the axial apex point of a surface to the position of the maximum effective radius of the same surface on the image side of the optical lens assembly for photography, the value of the shift is positive; when the direction is from the axial apex point of the surface to the position of the maximum effective radius of the same surface on the object side of the optical lens assembly for photography, the value of the shift is negative.

[0052] According to the present disclosure, an optically effective area of at least one of the object-side surface and the image-side surface of at least one optical element of the photographic optical lens assembly may not be circular. Therefore, it is advantageous to appropriately reduce the size of the photographic optical lens assembly in accordance with the shape of the imaging area of the image sensor and at the same time provide high image quality. See Fig. 44 and Fig. 45, which respectively show schematic views of a structure of an optically effective area OEA of a single optical element of a photographic optical lens assembly according to various aspects of the present disclosure. In Fig.44, the shape of the optically effective area OEA is not circular, and preferably, a ratio of a long axis to a short axis of the optically effective area OEA may be in the range of 1.20 to 1.90. In Fig. 45, the shape of the optically effective area OEA may be substantially rectangular, and preferably, a ratio of a length to a width of the optically effective area OEA may be in the range of 1.20 to 1.90.

[0053] According to the present disclosure, at least one optical element of the optical lens assembly for photographing may have at least one pair of cut edges that face each other on a circumference thereof and are parallel to each other. Therefore, it is advantageous to reduce a single axis length of the optical element to reduce the lens size and contribute to further miniaturization of the optical lens assembly for photography. See Fig. 44 and Fig. 45, whereinFig. 44 shows a schematic view of the structure of a pair of cut edges CSP of a single optical element of an optical lens assembly for photography according to one aspect of the present disclosure, and Fig. 45 shows a schematic view of the structure of two pairs of cut edges CSP of a single optical element of an optical lens assembly for photography according to a further aspect of the present disclosure. In addition, the at least one pair of cut edges can also serve as a positioning structure during the manufacture and assembly of the optical element. Additionally, an outer diameter of a tube that holds the optical lens assembly for photography can also be cut to form at least one pair of cut edges that face each other and are parallel to each other to reduce the lens size.

[0054] According to the present disclosure, the aforementioned features and conditions can be used in numerous combinations to achieve corresponding effects.

[0055] According to the present disclosure, the optical elements of the optical lens assembly for photographing can be made of either glass or plastic material. When the optical elements are made of glass material, the refractive power distribution of the optical lens assembly for photographing can be more flexible, and the influence on imaging caused by a change in the ambient temperature can be reduced. The optical glass element can be produced either by grinding or by molding. When the optical elements are made of plastic material, the manufacturing costs can be effectively reduced. Furthermore, the surfaces of each of the optical elements can be formed spherically or aspherically. Spherical optical elements are easy to manufacture.The construction of aspherical optical elements allows for more control variables to eliminate their aberrations and reduce the required number of optical elements, thereby effectively shortening the overall length of the photographic optical lens assembly. Additionally, the aspherical surfaces can be produced by plastic injection molding or glass molding.

[0056] According to the present disclosure, when a surface of an optical element is aspherical, it means that the surface of the optical element has an aspherical shape in its entire optically effective area or one or more sections thereof.

[0057] According to the present disclosure, the material of one or more optical elements may optionally contain an additive that generates light absorption and interference effects and changes the transmittance of the optical elements in a certain wavelength range to reduce unwanted scattered light or color deviations. For example, the additive may 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 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 disturbing the final image. The additive can be homogeneously mixed with a plastic material that is used for manufacturing an optical element from a mixed material by injection molding.In addition, the additive can be applied to the surfaces of the optical elements to achieve the above-mentioned effects.

[0058] According to the present disclosure, each of the object-side surfaces and the image-side surfaces has a paraxial region and an off-axial region. The paraxial region refers to the region of the surface in which light rays run close to the optical axis, and the off-axial region refers to the region of the surface that is removed from the paraxial region. In particular, unless otherwise specified, if the optical element has a convex surface, it means that the surface is convex in the paraxial region thereof; if the optical element has a concave surface, this means that the surface is concave in the paraxial region thereof. If a section of the radius of curvature, the refractive power, or the focal point of an optical element is not defined, this means that the section of the radius of curvature, the refractive power, or the focal point of the optical element is in its paraxial region.

[0059] According to the present disclosure, an inflection point is a point on the surface of the optical element at which the surface changes from concave to convex or vice versa.

[0060] 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 is concave towards the object side of the optical lens assembly for photography.

[0061] According to the present disclosure, an image correction unit, such as an image field flattener, can be optionally arranged between the optical element that is arranged closest to the image side of the optical lens assembly for photography along the optical path, 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 with spherical, aspherical, diffractive, or Fresnel types), can be adjusted according to the construction of the image capturing unit. Generally, a preferred image correction unit is, for example, a thin transparent element with a concave object-side surface and a planar image-side surface, and the thin transparent element is arranged near the image surface.

[0062] According to the present disclosure, optionally, at least one reflecting element with a beam path deflecting function, such as a prism or a mirror, can be provided between an object to be imaged and the image surface on the beam path of the imaging, and the surface shape of the prism or mirror can be formed planar, spherical, aspherical or as a freeform shape, so that the optical lens assembly for photographing can be arranged more spatially flexibly and thus the dimensions of an electronic device are not limited by the total length of the optical lens assembly for photographing. The reflecting element can be arranged between an object to be imaged and the image surface, in particular between the last optical element (e.g., the sixth optical element) and the image surface of the optical lens assembly for photography, in order to reduce the size of the optical lens assembly for photography.The optical path can be deflected once, twice, three times or more by a reflecting element. In addition, the reflecting element may have at least one reflecting surface, and an angle between the optical axis and a normal direction of the reflecting surface is not limited to 45 degrees, but may have other angles depending on the spatial arrangement. The optical path along the optical axis on the object side can be deflected by the reflecting element to an optical axis on the image side. An angle between a vector of the optical axis on the object side and that on the image side can be any angle that is not limited to 0, 90 or 180 degrees.In order to reduce the size of the optical lens assembly for photography, the length and width of the reflecting mirror can also be different from each other, and the length, width and height of the prism can be different from each other. The surface of the reflecting element (e.g., the surface of the prism or the reflecting mirror) can meet the optical construction requirements by being planar, spherical, aspherical or a freeform shape, but the present disclosure is not limited thereto. The reflecting element can consist of more than one prism according to the construction requirements. The prism can be made of glass material or plastic material according to the construction requirements.

[0063] According to the present disclosure, the optical lens assembly for photographing may include at least one aperture, such as an aperture diaphragm, a shading aperture or a field stop. The aperture diaphragm, the shading aperture or the field stop is adjusted to eliminate the scattered light and thereby improve the image quality thereof.

[0064] According to the present disclosure, an aperture stop can be formed as a front stop or as an intermediate stop. A front stop arranged between an object to be imaged and the first optical element can provide a greater distance between an exit pupil of the optical lens assembly for photographing and the image surface, in order to produce a telecentric effect, and thereby improve the image sensitivity of an image sensor (for example, a CCD or CMOS). An intermediate stop arranged between the first optical element and the image surface is advantageous for enlarging the viewing angle of the optical lens assembly for photography, and thereby provides a wider viewing field for this.

[0065] According to the present disclosure, the optical lens assembly for photography may include an aperture control unit. The aperture control unit may be a mechanical component or a light modulator that can control the size and shape of the aperture by electricity or electrical signals. The mechanical component may include a movable element, such as a diaphragm arrangement or a light shielding film. The light modulator may 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. In addition, the aperture control unit may be the aperture diaphragm of the present disclosure, which changes the diaphragm number to achieve various image effects, such as depth of focus or lens sensitivity.

[0066] According to the present disclosure, the optical lens assembly for photography may include one or more optical components for limiting the shape of the light passing through the optical lens assembly for photography. Each of the optical components may be, for example, a filter, a polarizer, etc., and each of the optical components may be, for example, a single-component, a composite component, a thin film, etc. The optical component may be arranged on the object side or the image side of the optical lens assembly for photography or between two adjacent optical elements to allow light to pass through in a specific form and thereby meet application requirements.

[0067] According to the present disclosure, the optical lens assembly for photography may include at least one optical lens element, an optical component, or a carrier having at least one surface with a low-reflection layer. The low-reflection layer can effectively reduce scattered light generated due to light reflection at the interface. The low-reflection layer can be arranged in an optically ineffective area of an object-side surface or an image-side surface of the optical lens element or a connection surface between the object-side surface and the image-side surface. The optical component can be a light blocking element, an annular spacer element, a tube element, a cover glass, a blue glass, a filter, a color filter, a beam path deflecting element (e.g., a reflecting element), a prism, a mirror, etc.The carrier 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 for protecting the image sensor, etc.

[0068] According to the present disclosure, the object side and the image side are defined according to the direction of the optical axis, and the axial optical data are calculated along the optical axis. Further, when the optical axis is deflected by a reflecting element, the axial optical data are also calculated along the deflected optical axis.

[0069] According to the above description of the present disclosure, the following specific embodiments are provided for further explanation. 1. Embodiment

[0070] Fig.1 is a schematic cross-sectional view of an image capturing unit according to the first embodiment of the present disclosure, which corresponds to a diagonal direction of an effective light-sensitive area of an image sensor. Fig. 2 is a schematic cross-sectional view of the image capturing unit according to the first embodiment of the present disclosure, which corresponds to a short side direction of the effective light-sensitive area of the image sensor, with a light path deflected by a first optical element. Fig. 3 shows, in order from left to right, spherical aberration curves, astigmatic field curves, and a distortion curve of the image capturing unit according to the first embodiment. In Fig. 1 and Fig.2 includes the image capturing unit 1, the optical lens assembly for photography (the reference signs thereof are omitted) of the present disclosure, and an image sensor IS. The optical lens assembly for photography includes, in the order from an object side to an image side along an optical path, a first optical element E1, an aperture S1, a second optical element E2, a third optical element E3, a fourth optical element E4, an aperture S2, a fifth optical element E5, a sixth optical element E6, a filter E7, and an image surface IMG. Additionally, the image sensor IS is formed as a rectangular element with an aspect ratio of 4:3, but the present disclosure is not limited thereto. For example, the image sensor IS may be formed as a rectangular element with an aspect ratio of 16:9 or as a rectangular element with an aspect ratio of 16:10.The photographic optical lens assembly includes six optical elements (E1, E2, E3, E4, E5, and E6), with no additional optical element arranged between any two of the six adjacent optical elements. To simplify the illustration of the refraction effect of the first optical element E1 on the light rays, in... Fig. 1 the ray bending effect caused by the first optical element E1 is not shown. The ray bending effect of the first optical element E1 is shown in Fig. 2.

[0071] The first optical element E1 with positive refractive power has an object-side surface that is convex in its paraxial region, and an image-side surface that is concave in its paraxial region. The first optical element E1 is a prism made of plastic material, and both the object-side surface and the image-side surface are aspherical. The image-side surface of the first optical element E1 has an inflection point. The first optical element E1 with beam path deflection function has a reflecting surface.

[0072] The second optical element E2 with positive refractive power has an object-side surface that is convex in its paraxial region, and an image-side surface that is concave in its paraxial region. The second optical element E2 is made of plastic material and both the object-side surface and the image-side surface are aspherical. The object-side surface of the second optical element E2 has an inflection point. The image-side surface of the second optical element E2 has an inflection point.

[0073] The third optical element E3 with negative refractive power has an object-side surface that is concave in its paraxial region, and an image-side surface that is concave in its paraxial region. The third optical element E3 is made of plastic material and both the object-side surface and the image-side surface are aspherical.

[0074] The fourth optical element E4 with positive refractive power has an object-side surface that is convex in its paraxial region, and an image-side surface that is concave in its paraxial region. The fourth optical element E4 is made of plastic material and has both the object-side surface and the image-side surface aspherical. The image-side surface of the fourth optical element E4 has an inflection point.

[0075] The fifth optical element E5 with negative refractive power has an object-side surface that is concave in its paraxial region, and an image-side surface that is concave in its paraxial region. The fifth optical element E5 is made of plastic material and has both the object-side surface and the image-side surface aspherical. The image-side surface of the fifth optical element E5 has an inflection point.

[0076] The sixth optical element E6 with positive refractive power has an object-side surface that is convex in its paraxial region, and an image-side surface that is concave in its paraxial region. The sixth optical element E6 is made of plastic material and has both the object-side surface and the image-side surface aspherical. The object-side surface of the sixth optical element E6 has an inflection point. The image-side surface of the sixth optical element E6 has two inflection points.

[0077] The filter E7 is made of glass material and is arranged between the sixth optical element E6 and the image surface IMG and has no influence on the focal length of the optical lens assembly for photography. The image sensor IS is arranged on or near the image surface IMG of the optical lens assembly for photography.

[0078] The equation of the aspherical surface profiles of the aforementioned optical elements of the first embodiment is expressed as follows: X(Y)=(Y2 / R) / (1+sqrt(1−(1+k)×(Y / R)2))+∑i(Ai)×(Yi) where X is the displacement parallel to an optical axis from an axial vertex point 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 conicity coefficient; and Ai is the i-th aspherical coefficient, where in the embodiments i can be 4, 6, 8, and 10, but is not limited thereto.

[0079] In the photographic optical lens group of the image capturing unit 1 according to the first embodiment, when the focal length of the photographic optical lens group is f, the entrance pupil diameter of the photographic optical lens group, which corresponds to the maximum direction of the entrance pupil diameter of the aperture stop, is EPDmax, and half of the maximum viewing angle of the photographic optical lens group is HFOV, these parameters have the following values: f = 15.03 millimeters (mm), f / EPDmax = 2.93, and HFOV = 12.7 degrees.

[0080] When the maximum viewing angle of the photographic optical lens group is FOV, the following condition is satisfied: FOV = 25.4 degrees.

[0081] When the focal length of the photographic optical lens group is f and the focal length of the first optical element E1 is f1, the following condition is satisfied: f / f1 = 0.40.

[0082] If the focal length of the optical lens assembly for photography is f and the focal length of the fourth optical element E4 is f4, the following condition is satisfied: f4 / f = 0.44.

[0083] If the focal length of the optical lens assembly for photography is f and the combined focal length of the second optical element E2 and the third optical element E3 is f23, the following condition is satisfied: f / f23 = -0.65.

[0084] If the focal length of the optical lens assembly for photography is f and the combined focal length of the fifth optical element E5 and the sixth optical element E6 is f56, the following condition is satisfied: f / f56 = -1.39.

[0085] If the focal length of the optical lens assembly for photographing is f, the focal length of the fifth optical element E5 is f5, and the focal length of the sixth optical element E6 is f6, the following condition is satisfied: f / f5 + f / f6 = -1.35.

[0086] If the curvature radius of the image-side surface of the fifth optical element E5 is R10 and the focal length of the sixth optical element E6 is f6, the following condition is satisfied: R10 / f6 = 0.13.

[0087] If the curvature radius of the object-side surface of the first optical element E1 is R1 and the curvature radius of the object-side surface of the fourth optical element E4 is R7, the following condition is satisfied: |R7 / R1| = 0.18.

[0088] If the curvature radius of the image-side surface of the first optical element E1 is R2 and the curvature radius of the object-side surface of the second optical element E2 is R3, the following condition is satisfied: |R3 / R2| = 0.02.

[0089] If the radius of curvature of the image-side surface of the first optical element E1 is R2 and the radius of curvature of the object-side surface of the fourth optical element E4 is R7, the following condition is satisfied: |R7 / R2| = 0.02.

[0090] If the radius of curvature of the object-side surface of the fourth optical element E4 is R7 and the radius of curvature of the image-side surface of the sixth optical element E6 is R12, the following condition is satisfied: R12 / R7 = 4.00.

[0091] If the radius of curvature of the image-side surface of the first optical element E1 is R2, the radius of curvature of the object-side surface of the fourth optical element E4 is R7, and the radius of curvature of the object-side surface of the fifth optical element E5 is R9, the following condition is satisfied: (|R7|+|R9|) / |R2| = 0.08.

[0092] If the radius of curvature of the object-side surface of the second optical element E2 is R3 and the radius of curvature of the image-side surface of the sixth optical element E6 is R12, the following condition is satisfied: (R3 + R12) / (R3 - R12) = -2.07.

[0093] If the radius of curvature of the object-side surface of the fourth optical element E4 is R7 and the radius of curvature of the object-side surface of the fifth optical element E5 is R9, the following condition is satisfied: (R7 + R9) / (R7 - R9) = -0.60.

[0094] If a sum of the axial distances between each of all adjacent optical elements of the photographic optical lens group is ΣAT, an axial distance between the image-side surface of the sixth optical element E6 and the image surface IMG BL is BL, and a sum of the central thicknesses of all optical elements of the photographic optical lens group is ΣCT, the following condition is satisfied: (ΣAT + BL) / ΣCT = 0.93. In this embodiment, an axial distance between two adjacent optical elements is a distance in a paraxial region between two adjacent surfaces of the two adjacent optical elements.In this embodiment, ΣAT is also equal to a sum of an axial distance between the first optical element E1 and the second optical element E2, an axial distance between the second optical element E2 and the third optical element E3, an axial distance between the third optical element E3 and the fourth optical element E4, an axial distance between the fourth optical element E4 and the fifth optical element E5, and an axial distance between the fifth optical element E5 and the sixth optical element E6. Additionally, in this embodiment, ΣCT is equal to a sum of a central thickness of the first optical element E1, a central thickness of the second optical element E2, a central thickness of the third optical element E3, a central thickness of the fourth optical element E4, a central thickness of the fifth optical element E5, and a central thickness of the sixth optical element E6.

[0095] If the central thickness of the first optical element E1 is CT1, the central thickness of the second optical element E2 is CT2, the central thickness of the third optical element E3 is CT3, the central thickness of the fourth optical element E4 is CT4, the central thickness of the fifth optical element E5 is CT5, and the central thickness of the sixth optical element E6 is CT6, the following condition is satisfied: (CT2 + CT3 + CT4 + CT5 + CT6) / CT1 = 0.99.

[0096] If the central thickness of the third optical element E3 is CT3 and the focal length of the optical lens assembly for photographing is f, the following condition is satisfied: 10×CT3 / f = 0.33.

[0097] If the central thickness of the first optical element E1 is CT1 and the central thickness of the third optical element E3 is CT3, the following condition is satisfied: 10×CT3 / CT1 = 0.93.

[0098] If the axial distance between the second optical element E2 and the third optical element E3 is T23 and the central thickness of the second optical element E2 is CT2, the following condition is satisfied: T23 / CT2 = 0.34.

[0099] If the Abbe number of the fifth optical element E5 is V5 and the Abbe number of the sixth optical element E6 is V6, the following condition is satisfied: V5 / V6 = 3.46.

[0100] If the refractive index of the first optical element E1 is N1, the following condition is satisfied: N1 = 1.544.

[0101] If the refractive index of the second optical element E2 is N2, the following condition is satisfied: N2 = 1.544.

[0102] If the refractive index of the fourth optical element E4 is N4, the following condition is satisfied: N4 = 1.562.

[0103] If a maximum effective radius of the object-side surface of the first optical element E1 is Y1R1 and a maximum image height of the photographic optical lens unit is ImgH, the following condition is satisfied: Y1R1 / ImgH = 1.04.

[0104] When a shift parallel to the optical axis from an axial vertex point of the object-side surface of the first optical element E1 to a position of the maximum effective radius of the object-side surface of the first optical element E1 is SAG1R1, a shift parallel to the optical axis from an axial vertex point of the image-side surface of the first optical element E1 to a position of the maximum effective radius of the image-side surface of the first optical element E1 is SAG1R2, and a distance parallel to the optical axis between the position of the maximum effective radius of the object-side surface of the first optical element E1 and the position of the maximum effective radius of the image-side surface of the first optical element E1 is ET1, the following condition is satisfied: (SAG1 R1 + SAG1 R2) / ET1 = 0.06. In this embodiment, the direction of SAG1R1 is towards the image side of the optical lens assembly for photography, and the value of SAG1R1 is positive; the direction of SAG1R2 is towards the object side of the optical lens assembly for photography, and the value of SAG1R2 is negative.

[0105] When a shift parallel to the optical axis from an axial vertex point of the object-side surface of the fifth optical element E5 to a position of the maximum effective radius of the object-side surface of the fifth optical element E5 is SAG5R1, a shift parallel to the optical axis from an axial vertex point of the image-side surface of the fifth optical element E5 to a position of the maximum effective radius of the image-side surface of the fifth optical element E5 is SAG5R2, and the central thickness of the fifth optical element E5 is CT5, the following condition is satisfied: (SAG5R1 + SAG5R2) / CT5 = -0.04. In this embodiment, the direction of SAG5R1 is towards the object side of the photographic optical lens unit, and the value of SAG5R1 is negative; the direction of SAG5R2 is towards the image side of the photographic optical lens unit, and the value of SAG5R2 is positive.

[0106] When a shift parallel to the optical axis from an axial vertex point of the image-side surface of the sixth optical element E6 to a position of the maximum effective radius of the image-side surface of the sixth optical element E6 is SAG6R2 and the central thickness of the sixth optical element E6 is CT6, the following condition is satisfied: SAG6R2 / CT6 = -0.0037. In this embodiment, the direction of SAG6R2 is towards the object side of the optical lens unit for photography, and the value of SAG6R2 is negative.

[0107] When an axial distance between the reflecting surface of the first optical element E1 and the image surface IMG P1TL and an axial distance between the object-side surface of the first optical element E1 and the image surface IMG TL, the following condition is satisfied: P1TL / TL = 0.86.

[0108] The detailed optical data of the first embodiment are listed in Table 1A and the data of the aspherical surface are listed in Table 1B below. TABLE 1A 1st Embodiment f = 15.03 mm, f / EPDmax = 2.93, HFOV = 12.7 degrees Surface# Radius of curvature Thickness Material Index Abbe # Focal length 0 Objective Infinity Infinity 1 Optic 1 18,7518 (ASP) 5,399 Plastic 1,544 55,9 37.47 2 212,7660 (ASP) 0,779 3 Aperture stop Plano 1,221 4 Optic 2 4,6861 (ASP) 1,421 [[ID= 1,544 55,9 11.46 5 16,8864 ​ 0,487 6 ​ -8,4049 ​ 0,500 ​ 1,615 25,4 -6.41 7 7,5789 ​ 1,287 8 ​ 3,3682 ​ 1,486 ​ 1,562 44,6 6.59 9 31,4080 ​ 1,199 10 ​ ​ 0,330 11 ​ -13,3860 ​ 0,958 ​ 1,515 56,4 -9.31 12 7,6616 ​ 0,180 13 ​ 10,3932 ​ 1,004 ​ 1,697 16,3 57.44 14 13,4785 ​ 1,000 15 ​ ​ 0,110 ​ 1,517 64,2 - 16 ​ 3,467 17 ​ ​ - ​ ​ ​ ​ The optical lens assembly for photographing may further include an aperture diaphragm , and the position of the aperture diaphragm can be adjusted according to the arrangement of the front reflecting element (the first optical element E1) or the cut edge(s) of the lens element(s). TABLE 1B Aspherical Coefficients Surface# 1 2 4 5 6 7 k = 5,16536E+00 9,00000E+01 1,89802E+00 8,59265E+00 3,07327E+01 6,00552E+00 A4 = -3,034E-05 -4,007E-04 1,457E-03 3,625E-04 1,700E-03 -5,886E-04 A6 = - - -2,060E-04 -7,026E-04 -3,488E-04 -3,832E-04 A8 = - - -2,358E-06 5,305E-05 8,923E-05 1,068E-04 A10 = - - -2,923E-06 -7,418E-06 -1,320E-05 -1,971E-05 Surface# 8 9 11 12 13 14 k = -4,28423E-01 6,68363E+01 6,43943E+00 4,71713E+00 1,20997E+01 2,36964E+01 A4 = -5,076E-03 -3,148E-03 -5,100E-03 -1,697E-03 -1,637E-02 -1,775E-02 A6 = 4,451E-04 -4,206E-04 -4,859E-03 -4,188E-03 1,454E-03 2,242E-03 A8 = -3,866E-05 1,038E-04 8,706E-04 9,878E-04 1,666E-04 -1,648E-04 A10 = 9,950E-06 6,090E-06 -5,079E-05 -8,781E-05 -2,650E-05 6,062E-06

[0109] In Table 1A, the radius of curvature, thickness, and focal length are given in millimeters (mm). The surface numbers 0 - 17 represent the surfaces arranged along the optical axis from the object side to the image side. In Table 1B, k represents the cone coefficient of the equation of the aspherical surface profiles. A4 - A10 represent the aspherical coefficients in the order from the 4th to the 10th order. The following tables for each embodiment show the corresponding schematic parameters and aberration curves, where the definitions of the tables are the same as in Table 1A and Table 1B of the first embodiment. Therefore, no further explanation will be given in this regard. 2. Embodiment

[0110] Fig. 4 is a schematic cross-sectional view of an image capturing unit according to the second embodiment of the present disclosure, which covers a diagonal direction of an effective light-sensitive area of an image sensor. Fig. 5 is a schematic cross-sectional view of the image capturing unit according to the second embodiment of the present disclosure, which corresponds to a short side direction of the effective light-sensitive area of the image sensor, with a light path deflected by a first optical element. Fig. 6 shows, in order from left to right, spherical aberration curves, astigmatic field curves, and a distortion curve of the image capturing unit according to the second embodiment. In Fig. 4 and Fig.5. The image acquisition unit 2 includes the optical lens assembly for photography (the reference signs thereof are omitted) of the present disclosure and an image sensor IS. The optical lens assembly for photography includes, in order from an object side to an image side along an optical path, a first optical element E1, an aperture S1, a second optical element E2, a third optical element E3, a fourth optical element E4, an aperture S2, a fifth optical element E5, a sixth optical element E6, a filter E7, and an image surface IMG. Additionally, the image sensor IS is formed as a rectangular element with an aspect ratio of 4:3, but the present disclosure is not limited thereto. For example, the image sensor IS can be formed as a rectangular element with an aspect ratio of 16:9 or as a rectangular element with an aspect ratio of 16:10.The optical lens assembly for photography includes six optical elements (E1, E2, E3, E4, E5, and E6), with no additional optical element arranged between any of the six adjacent optical elements. To simplify the illustration of the refraction effect of the first optical element E1 on the light rays, in... Fig. 4 the ray bending effect caused by the first optical element E1 is not shown. The ray bending effect of the first optical element E1 is shown in Fig. 5.

[0111] The first optical element E1 with positive refractive power has an object-side surface that is convex in its paraxial region, and an image-side surface that is concave in its paraxial region. The first optical element E1 is a prism made of plastic material, and both the object-side surface and the image-side surface are aspherical. The first optical element E1 with a beam path deflection function has a reflective surface.

[0112] The second optical element E2 with positive refractive power has an object-side surface that is convex in its paraxial region, and an image-side surface that is concave in its paraxial region. The second optical element E2 is a lens element made of plastic material, and both the object-side surface and the image-side surface are aspherical. The object-side surface of the second optical element E2 has an inflection point. The image-side surface of the second optical element E2 has an inflection point.

[0113] The third optical element E3 with negative refractive power has an object-side surface that is concave in its paraxial region, and an image-side surface that is concave in its paraxial region. The third optical element E3 is a lens element made of plastic material, and both the object-side surface and the image-side surface are aspherical.

[0114] The fourth optical element E4 with positive refractive power has an object-side surface that is convex in its paraxial region, and an image-side surface that is concave in its paraxial region. The fourth optical element E4 is a lens element made of plastic material, and both the object-side surface and the image-side surface are aspherical. The image-side surface of the fourth optical element E4 has two inflection points.

[0115] The fifth optical element E5 with negative refractive power has an object-side surface that is concave in its paraxial region, and an image-side surface that is concave in its paraxial region. The fifth optical element E5 is a lens element made of plastic material, and both the object-side surface and the image-side surface are aspherical. The image-side surface of the fifth optical element E5 has an inflection point.

[0116] The sixth optical element E6 with positive refractive power has an object-side surface that is convex in its paraxial region and an image-side surface that is concave in its paraxial region. The sixth optical element E6 is a lens element made of plastic material, and both the object-side surface and the image-side surface are aspherical. The object-side surface of the sixth optical element E6 has an inflection point. The image-side surface of the sixth optical element E6 has an inflection point.

[0117] The filter E7 is made of glass material and is arranged between the sixth optical element E6 and the image surface IMG and does not affect the focal length of the photographic optical lens unit. The image sensor IS is arranged on or near the image surface IMG of the photographic optical lens unit.

[0118] The detailed optical data of the second embodiment are listed in Table 2A and the aspherical surface data are listed in Table 2B below. TABLE 2A 2. Embodiment f = 16.42 mm, f / EPDmax = 2.80, HFOV = 11.1 degrees Surface# Radius of Curvature Thickness Material Index Abbe # Focal Length 0 Objective Infinity Infinity 1 Optic 1 15,2016 (ASP) 5,266 Plastic 1,545 56,1 49.98 2 30,1997 (ASP) 2,368 3 Diaphragm Plano -0,572 4 Optic 2 4,0877 (ASP) 1,489 Plastic 1,545 56,1 10.23 5 13,3553 (ASP) 0,519 6 Optic 3 -8,1956 (ASP) 0,500 Plastic 1,615 25,3 -6.72 7 8,5368 (ASP) 1,014 8 Optic 4 3,5416 (ASP) 0,972 Plastic 1,545 56,1 7.60 9 22,1361 (ASP) 1,224 10 Diaphragm Plano 0,292 11 Optic 5 -9,3342 (ASP) 0,500 Plastic 1,545 56,1 -7.96 12 8,2543 (ASP) 0,103 13 Optic 6 7,3217 (ASP) 0,625 Plastic 1,669 19,5 18.76 14 16,9728 (ASP) 1,000 15 Filter Plano 0,110 Glass 1,517 64,2 - 16 Plano 5,157 17 Image Plano - Note: The reference wavelength is 587.6 nm (d-line). The effective radius of the diaphragm S1 (Surface 3) is 2.432 mm. The effective radius of the diaphragm S2 (Surface 10) is 1.500 mm. The first optical element E1 is a prism with refractive power. The optical lens assembly for photographing may further include an aperture stop and the position of the aperture stop may be adjusted according to the arrangement of the front reflecting element (the first optical element or the cut edge(s) of the lens element(s)). TABLE 2B Aspherical coefficients Surface# 1 2 4 5 6 7 k = 3,05903E-01 1,67580E+01 1,69795E+00 2,25039E+01 4,42376E+01 6,37599E+00 A4 = 4,245E-05 -6,297E-05 1,941E-03 1,910E-03 1,311E-03 -1,322E-03 A6 = - - -2,639E-04 -1,630E-03 -5,743E-04 8,371E-05 A8 = - - 3,759E-07 1,861E-04 1,496E-04 1,573E-05 A10 = - - -3,449E-06 -1,197E-05 -1,515E-05 -1,040E-05 Surface# 8 9 11 12 13 14 k = -3,43675E-01 7,56832E+01 1,95246E+01 2,28435E+00 7,80021E+00 4,95330E+01 A4 = -8,505E-03 -4,466E-03 -2,575E-03 1,273E-02 -7,512E-03 -1,934E-02 A6 = 2,318E-03 1,055E-03 -7,973E-03 -1,705E-02 -6,769E-03 7,129E-04 A8 = -3,995E-04 -3,153E-04 1,087E-03 4,666E-03 2,985E-03 5,464E-04 A10 = 4,220E-05 3,327E-05 -4,649E-05 -5,144E-04 -3,883E-04 -8,628E-05

[0119] In the second embodiment, the equation of the aspherical surface profiles of the aforementioned optical elements is the same as the equation of the first embodiment. Also, the definitions of these parameters, which are shown in Table 2C below, are the same as those specified in the first embodiment, with corresponding values for the second embodiment; therefore, an explanation thereof will not be given again here.

[0120] In addition, these parameters can be calculated as the following values from Table 2A and Table 2B and satisfy the following conditions: TABLE 2C Values of optical and physical parameters / definitions f [mm] 16,42 (R7+R9) / (R7-R9) -0,45 f / EPDmax 2,80 (ΣAT+BL) / ΣCT 1,20 HFOV [Degree] 11,1 (CT2+CT3+CT4+CT5+CT6) / CT1 0,78 FOV [Degree] 22,2 10×CT3 / f 0,30 f / f1 0,33 10×CT3 / CT1 0,95 f4 / f 0,46 T23 / CT2 0,35 f / f23 -0,36 V5 / V6 2,88 f / f56 -1,19 N1 1,545 f / f5+f / f6 -1,19 N2 1,545 R10 / f6 0,44 N4 1,545 |R7 / R1| 0,23 Y1R1 / ImgH 1,29 |R3 / R2| 0,14 (SAG1R1+SAG1R2) / ET1 0,16 |R7 / R 0,12 ​ -0,27 ​ 4,79 ​ -0,06 ​ 0,43 ​ 0,86 ​ -1,63 - - Third Embodiment

[0121] ​7 is a schematic cross-sectional view of an image capturing unit according to the third embodiment of the present disclosure, which corresponds to a diagonal direction of an effective light-sensitive area of an image sensor. ​ 8 is a schematic cross-sectional view of the image capturing unit according to the third embodiment of the present disclosure, which corresponds to a short side direction of the effective light-sensitive area of the image sensor, with a light path deflected by a first optical element. ​ 9 shows, in order from left to right, spherical aberration curves, astigmatic field curves, and a distortion curve of the image capturing unit according to the third embodiment. In ​ 7 and ​8 includes the image capturing unit 3, the optical lens assembly for photography (the reference signs thereof are omitted) of the present disclosure, and an image sensor IS. The optical lens assembly for photography includes, in the order from an object side to an image side along an optical path, a first optical element E1, a second optical element E2, an aperture S1, a third optical element E3, a fourth optical element E4, an aperture S2, a fifth optical element E5, a sixth optical element E6, a filter E7, and an image surface IMG. Additionally, the image sensor IS is formed as a rectangular element with an aspect ratio of 4:3, but the present disclosure is not limited thereto. For example, the image sensor IS may be formed as a rectangular element with an aspect ratio of 16:9 or as a rectangular element with an aspect ratio of 16:10.The photographic optical lens assembly includes six optical elements (E1, E2, E3, E4, E5, and E6), with no additional optical element arranged between any two adjacent ones of the six optical elements. To simplify the illustration of the refraction effect of the first optical element E1 on light rays, in... ​ 7, the ray bending effect caused by the first optical element E1 is not shown. The ray bending effect of the first optical element E1 is shown in ​ 8.

[0122] The first optical element E1 with positive refractive power has an object-side surface that is convex in its paraxial region, and an image-side surface that is concave in its paraxial region. The first optical element E1 is a prism made of plastic material, and both the object-side surface and the image-side surface are aspherical. The first optical element E1 with a beam path deflection function has a reflecting surface.

[0123] The second optical element E2 with positive refractive power has an object-side surface that is convex in its paraxial region, and an image-side surface that is convex in its paraxial region. The second optical element E2 is a lens element made of plastic material, and both the object-side surface and the image-side surface are aspherical. The object-side surface of the second optical element E2 has an inflection point.

[0124] The third optical element E3 with negative refractive power has an object-side surface that is concave in its paraxial region, and an image-side surface that is concave in its paraxial region. The third optical element E3 is a lens element made of plastic material, and both the object-side surface and the image-side surface are aspherical.

[0125] The fourth optical element E4 with positive refractive power has an object-side surface that is convex in its paraxial region, and an image-side surface that is concave in its paraxial region. The fourth optical element E4 is a lens element made of plastic material, and both the object-side surface and the image-side surface are aspherical.

[0126] The fifth optical element E5 with positive refractive power has an object-side surface that is concave in its paraxial region, and an image-side surface that is convex in its paraxial region. The fifth optical element E5 is a lens element made of plastic material and has an object-side surface and an image-side surface that are both aspherical.

[0127] The sixth optical element E6 with negative refractive power has an object-side surface that is concave in its paraxial region, and an image-side surface that is concave in its paraxial region. The sixth optical element E6 is a lens element made of plastic material and both its object-side surface and its image-side surface are aspherical.

[0128] The filter E7 is made of glass material and is arranged between the sixth optical element E6 and the image surface IMG and has no influence on the focal length of the optical lens assembly for photography. The image sensor IS is arranged on or near the image surface IMG of the optical lens assembly for photography.

[0129] The detailed optical data of the third embodiment are listed in Table 3A and the aspherical surface data are listed in Table 3B below. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 0 ​ ​ ​ 1 ​ 11,5469 ​ 5,389 ​ 1,544 56,0 30.85 2 30,9276 ​ 0,800 3 ​ 5,4386 (ASP) 0,933 Plastic 1,544 56,0 9.18 4 -57,6754 (ASP) -0,014 5 Shutter Plano 0,272 6 Optic 3 -6,1369 (ASP) 0,500 Plastic 1,584 28,2 -5.55 7 7,0696 (ASP) 2,115 8 Optic 4 3,1623 (ASP) 1,660 Plastic 1,551 44,8 6.54 9 21,0558 (ASP) 1,370 10 Shutter Plano 0,605 11 Optic 5 -18,5435 (ASP) 0,909 Plastic 1,511 56,8 236.07 12 -16,3387 (ASP) 0,155 13 Optic 6 -12,2022 (ASP) 0,921 Plastic 1,551 44,8 -9.61 14 9,6026 (ASP) 0,800 15 Filter Plano 0,110 Glass 1,517 64,2 - 16 Plano 2,469 17 Image Plano - Note: The reference wavelength is 587.6 nm (d-line). The effective radius of the shutter S1 (surface 5) is 1.938 mm. The effective radius of the shutter S2 (surface 10) is 1.635 mm. The first optical element E1 is a prism with refractive power. The optical lens assembly for photography may further include an aperture stop and the position of the aperture stop can be adjusted depending on the arrangement of the front reflecting element (the first optical element E1) or the cut edge(s) of the lens element(s). TABLE 3B Aspherical Coefficients Surface# 1 2 3 4 6 7 k = 1,64669E-01 2,90988E+01 2,41067E+00 9,00000E+01 1,88267E+01 6,80940E+00 A4 = -1,564E-04 5,945E-04 2,221E-03 4,164E-03 2,189E-03 -2,740E-03 A6 = - - -3,716E-04 -2,014E-03 -5,733E-05 7,866E-04 A8 = - - -3,593E-05 2,642E-04 1,713E-05 -1,686E-04 A10 = - - -2,402E-07 -2,061E-05 -8,651E-06 -1,026E-05 Surface# 8 9 11 12 13 14 k = -3,99992E-01 6,59197E+01 3,09764E+01 5,47801E+01 3,00747E+01 1,08656E+01 A4 = -5,859E-03 -3,571E-03 -6,317E-03 -1,811E-03 -1,515E-02 -1,747E-02 A6 = 6,187E-04 4,238E-04 -2,639E-03 -8,788E-03 -2,630E-03 3,652E-03 A8 = -7,405E-06 8,837E-05 8,795E-04 1,421E-03 5,493E-04 -2,950E-04 A10 = 3,196E-06 -1,250E-06 -1,271E-04 -4,005E-05 5,081E-05 8,712E-06

[0130] In the third embodiment, the equation of the aspherical surface profiles of the aforementioned optical elements is the same as the equation of the first embodiment. Also, the definitions of these parameters, which are shown in Table 3C below, are the same as those given in the first embodiment, with corresponding values for the third embodiment; therefore, an explanation thereof will not be given again.

[0131] In addition, these parameters can be calculated as the following values from Table 3A and Table 3B and satisfy the following conditions: TABLE 3C Values of Optical and Physical Parameters / Definitions f [mm] 13,41 (R7 + R9) / (R7 - R9) -0,71 f / EPDmax 2,70 (ΣAT + BL) / ΣCT 0,84 HFOV [Degree] 12,5 (CT2 + CT3 + CT4 + CT5 + CT6) / CT1 0,91 FOV [Degree] 25,0 10×CT3 / f 0,37 f / f1 0,43 10×CT3 / CT1 0,93 f4 / f 0,49 T23 / CT2 0,28 f / f23 -0,71 V5 / V6 1,27 f / f56 -1,36 N1 1,544 f / f5 + f / f6 -1,34 N2 1,544 R 1 0 / f6 1,70 N4 1,551 |R7 / R1| 0,27 Y1R1 / ImgH 1,24 |R3 / R2| 0,18 (SAG1R1 + SAG1R2) / ET1 0,14 |R7 / R2| 0,10 (SAG5R1 + SAG5R2) / CT5 -0,48 R12 / R7 3,04 SAG6R2 / CT6 0,14 (|R7| + |R9|) / |R2| 0,70 P1TL / TL 0,85 (R3 + R12) / (R3 - R12) -3,61 - - 4. Embodiment

[0132] Fig. FIG. 10 is a schematic cross-sectional view of an image capturing unit according to the fourth embodiment of the present disclosure, which corresponds to a diagonal direction of an effective light-sensitive area of an image sensor. Fig.11 is a schematic cross-sectional view of the image capturing unit according to the fourth embodiment of the present disclosure, which corresponds to a short side direction of the effective light-sensitive area of the image sensor, with a light path deflected by a first optical element. Fig. 12 shows, in order from left to right, spherical aberration curves, astigmatic field curves, and a distortion curve of the image capturing unit according to the fourth embodiment. In Fig. 10 and Fig.11 The image acquisition unit 4 includes the photographic optical lens assembly (the reference signs thereof are omitted) of the present disclosure and an image sensor IS. The photographic optical lens assembly includes, in order from an object side to an image side along an optical path, a first optical element E1, an aperture S1, a second optical element E2, a third optical element E3, a fourth optical element E4, an aperture S2, a fifth optical element E5, a sixth optical element E6, a filter E7, and an image surface IMG. Additionally, the image sensor IS is formed as a rectangular element with an aspect ratio of 4:3, but the present disclosure is not limited thereto. For example, the image sensor IS may be formed as a rectangular element with an aspect ratio of 16:9 or as a rectangular element with an aspect ratio of 16:10.The optical lens assembly for photography includes six optical elements (E1, E2, E3, E4, E5, and E6), and no additional optical element is arranged between any two of the six adjacent optical elements. To simplify the illustration of the refraction effect of the first optical element E1 on the light rays, in... Fig. 10, the ray deflection effect caused by the first optical element E1 is not shown. The ray deflection effect of the first optical element E1 is shown in Fig. 11.

[0133] The first optical element E1 with positive refractive power has an object-side surface that is convex in its paraxial region, and an image-side surface that is convex in its paraxial region. The first optical element E1 is a prism made of plastic material, and both the object-side surface and the image-side surface are aspherical. The object-side surface of the first optical element E1 has an inflection point. The first optical element E1 with beam path deflection has a reflecting surface.

[0134] The second optical element E2 with positive refractive power has an object-side surface that is convex in its paraxial region, and an image-side surface that is concave in its paraxial region. The second optical element E2 is a lens element made of plastic material, and both the object-side surface and the image-side surface are aspherical. The object-side surface of the second optical element E2 has an inflection point. The image-side surface of the second optical element E2 has an inflection point.

[0135] The third optical element E3 with negative refractive power has an object-side surface that is concave in its paraxial region, and an image-side surface that is concave in its paraxial region. The third optical element E3 is a lens element made of plastic material, and both the object-side surface and the image-side surface are aspherical.

[0136] The fourth optical element E4 with positive refractive power has an object-side surface that is convex in its paraxial region, and an image-side surface that is convex in its paraxial region. The fourth optical element E4 is a lens element made of plastic material, and both the object-side surface and the image-side surface are aspherical. The image-side surface of the fourth optical element E4 has an inflection point.

[0137] The fifth optical element E5 with negative refractive power has an object-side surface that is concave in its paraxial region, and an image-side surface that is concave in its paraxial region. The fifth optical element E5 is a lens element made of plastic material, and both the object-side surface and the image-side surface are aspherical. The image-side surface of the fifth optical element E5 has an inflection point.

[0138] The sixth optical 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 optical element E6 is a lens element made of plastic material, and both the object-side surface and the image-side surface are aspherical. The object-side surface of the sixth optical element E6 has an inflection point. The image-side surface of the sixth optical element E6 has an inflection point.

[0139] The filter E7 is made of glass material and is arranged between the sixth optical element E6 and the image surface IMG and has no influence on the focal length of the optical lens assembly for photography. The image sensor IS is arranged on or near the image surface IMG of the optical lens assembly for photography.

[0140] The detailed optical data of the fourth embodiment are listed in Table 4A and the aspherical surface data are listed in Table 4B below. TABELLE 4A 4. Embodiment f = 14.26 mm, f / EPDmax = 2.63, HFOV = 12.7 degrees Surface# Radius of curvature Thickness Material Index Abbe # Focal length 0 Objective Infinity Infinity 1 Optic 1 19,2293 (ASP) 5,470 Plastic 1,515 56,4 28.43 2 -55,5556 (ASP) 0,507 3 Aperture Plano 0,231 4 Optic 2 4,7143 (ASP) 1,299 Plastic 1,511 56,8 13.19 5 14,2205 (ASP) 0,399 6 Optic 3 -9,2382 (ASP) 0,500 Plastic 1,614 25,6 -6.55 7 7,2571 (ASP) 1,059 8 Optic 4 3,3871 (ASP) 1,830 Plastic 1,551 44,8 5.34 9 -17,9637 (ASP) 0,437 10 Aperture Plano 0,457 11 Optic 5 -9,1608 (ASP) 0,673 Plastic 1,529 45,4 -6.01 12 4,9957 (ASP) 0,262 13 Optic 6 7,7572 (ASP) 1,047 Plastic 1,697 16,3 37.22 14 10,4519 (ASP) 0,800 15 Filter Plano 0,110 Glass 1,517 64,2 - 16 Plano 4,118 17 Image Plano - Note: The reference wavelength is 587.6 nm (d-line). The effective radius of the aperture S1 (surface 3) is 2.450 mm. The effective radius of the aperture S2 (surface 10) is 1.742 mm. The first optical element E1 is a prism with refractive power. The optical lens assembly for photography may further include an aperture stop comprise, and the position of the aperture stop may depend on the arrangement - adjustment of the front reflecting element (the first optical element E1) or of the cut edge(s) of the lens element(s). TABLE 4B Aspherical Coefficients Surface# 1 2 4 5 6 7 k = -1,93644E-01 9,00000E+01 1,33742E+00 1,62193E-01 3,05565E+01 5,55696E+00 A4 = -3,679E-04 -5,736E-04 1,601E-03 6,188E-04 1,153E-03 -2,318E-03 A6 = - - -9,365E-05 -3,559E-04 1,221E-04 2,895E-04 A8 = - - -1,467E-05 -5,275E-05 -9,117E-06 5,272E-05 A10 = - - -3,157E-06 3,848E-07 -4,906E-06 -1,856E-05 Surface# 8 9 11 12 13 14 k = -3,74793E-01 2,63732E+01 -5,99117E-02 1,58022E+00 7,31039E+00 1,36097E+01 A4 = -5,429E-03 -1,942E-03 -2,932E-03 -6,119E-03 -1,921E-02 -1,742E-02 A6 = 4,302E-04 -1,217E-03 -6,963E-03 -8,923E-04 4,965E-03 2,622E-03 A8 = 1,182E-05 3,842E-04 1,822E-03 2,077E-04 -9,192E-04 -3,883E-04 A10 = 3,488E-06 -2,408E-05 -1,739E-04 -4,256E-05 6,350E-05 2,744E-05

[0141] In the fourth embodiment, the equation of the aspherical surface profiles of the aforementioned optical elements is the same as the equation of the first embodiment. Also, the definitions of these parameters, which are shown in Table 4C below, are the same as those specified in the first embodiment, with corresponding values for the fourth embodiment; therefore, an explanation thereof will not be given again.

[0142] In addition, these parameters can be calculated as the following values from Table 4A and Table 4B and satisfy the following conditions: TABLE 4C Values of the optical and physical parameters / Definitions f [mm] 14,26 (R7 + R9) / (R7 - R9) -0,46 f / EPDmax 2,63 (ΣAT + BL) / ΣCT 0,77 HFOV [Degree] 12,7 (CT2 + CT3 + CT4 + CT5 + CT6) / CT1 0,98 FOV [Degree] 25,4 10×CT3 / f 0,35 f / f1 0,50 10×CT3 / CT1 0,91 f4 / f 0,37 T23 / CT2 0,31 f / f23 -0,80 V5 / V6 2,79 f / f56 -2,06 N1 1,515 f / f5 + f / f6 -1,99 N2 1,511 R 1 0 / f6 0,13 N4 1,551 |R7 / R1| 0,18 Y1R1 / ImgH 1,11 |R3 / R2| 0,08 (SAG1R1 + SAG1R2) / ET1 0,04 |R7 / R2| 0,06 (SAG5R1 + SAG5R2) / CT5 0,01 R12 / R7 3,09 SAG6R2 / CT6 0,04 (|R7| + |R9|) / |R2| 0,23 P1TL / TL 0,86 (R3 + R12) / (R3 - R12) -2,64 - - 5. Embodiment

[0143] Fig.13 is a schematic cross-sectional view of an image capturing unit according to the fifth embodiment of the present disclosure, which corresponds to a diagonal direction of an effective light-sensitive area of an image sensor. Fig. 14 is a schematic cross-sectional view of the image capturing unit according to the fifth embodiment of the present disclosure, which corresponds to a short side direction of the effective light-sensitive area of the image sensor, with a light path deflected by a first optical element. Fig. 15 shows, in order from left to right, spherical aberration curves, astigmatic field curves, and a distortion curve of the image capturing unit according to the fifth embodiment. In Fig. 13 and Fig.14 The image capturing unit 5 includes the optical lens assembly for photography (the reference signs thereof are omitted) of the present disclosure and an image sensor IS. The optical lens assembly for photography includes, in the order from an object side to an image side along an optical path, a first optical element E1, an aperture S1, a second optical element E2, a third optical element E3, a fourth optical element E4, an aperture S2, a fifth optical element E5, a sixth optical element E6, a filter E7, and an image surface IMG. Additionally, the image sensor IS is formed as a rectangular element with an aspect ratio of 4:3, but the present disclosure is not limited thereto. For example, the image sensor IS may be formed as a rectangular element with an aspect ratio of 16:9 or as a rectangular element with an aspect ratio of 16:10.The optical lens assembly for photography includes six optical elements (E1, E2, E3, E4, E5, and E6), and no additional optical element is arranged between any two adjacent ones of the six optical elements. To simplify the illustration of the refraction effect of the first optical element E1 on the light rays, in... Fig. 13, the ray bending effect caused by the first optical element E1 is not shown. The ray bending effect of the first optical element E1 is shown in Fig. 14.

[0144] The first optical element E1 with positive refractive power has an object-side surface that is convex in its paraxial region, and an image-side surface that is convex in its paraxial region. The first optical element E1 is a prism made of plastic material, and both the object-side surface and the image-side surface are aspherical. The object-side surface of the first optical element E1 has an inflection point. The first optical element E1 with beam path deflection has a reflecting surface.

[0145] The second optical element E2 with positive refractive power has an object-side surface that is convex in its paraxial region, and an image-side surface that is concave in its paraxial region. The second optical element E2 is a lens element made of plastic material, and both the object-side surface and the image-side surface are aspherical. The object-side surface of the second optical element E2 has an inflection point. The image-side surface of the second optical element E2 has an inflection point.

[0146] The third optical element E3 with negative refractive power has an object-side surface that is concave in its paraxial region, and an image-side surface that is concave in its paraxial region. The third optical element E3 is a lens element made of plastic material, and both the object-side surface and the image-side surface are aspherical. The object-side surface of the third optical element E3 has two inflection points.

[0147] The fourth optical element E4 with positive refractive power has an object-side surface that is convex in its paraxial region, and an image-side surface that is convex in its paraxial region. The fourth optical element E4 is a lens element made of plastic material, and both the object-side surface and the image-side surface are aspherical.

[0148] The fifth optical element E5 with negative refractive power has an object-side surface that is concave in its paraxial region, and an image-side surface that is concave in its paraxial region. The fifth optical element E5 is a lens element made of plastic material, and both the object-side surface and the image-side surface are aspherical. The image-side surface of the fifth optical element E5 has an inflection point.

[0149] The sixth optical element E6 with positive refractive power has an object-side surface that is convex in its paraxial region and an image-side surface that is concave in its paraxial region. The sixth optical element E6 is a lens element made of plastic material, and both the object-side surface and the image-side surface are aspherical. The object-side surface of the sixth optical element E6 has an inflection point. The image-side surface of the sixth optical element E6 has two inflection points.

[0150] The filter E7 is made of glass material and is arranged between the sixth optical element E6 and the image surface IMG and has no influence on the focal length of the optical lens assembly for photography. The image sensor IS is arranged on or near the image surface IMG of the optical lens assembly for photography.

[0151] The detailed optical data of the fifth embodiment are listed in Table 5A and the aspherical surface data are listed in Table 5B below. TABLE 5A 5. Embodiment f = 14.17 mm, f / EPDmax = 2.72, HFOV = 12.6 Degrees Surface# Curvature Radius Thickness Material Index Abbe # Focal Length 0 Objective Infinity Infinity 1 Optic 1 25,0080 (ASP) 5,500 Plastic 1,530 55,8 24,17 2 -24,2903 (ASP) 0,803 3 Aperture Stop Plano 0,334 4 Optic 2 4,3478 (ASP) 0,831 [[ID= 1,511 56,8 17,46 5 7,9329 ​ 0,433 6 ​ -13,5753 ​ 0,500 ​ 1,587 28,3 -7,78 7 6,9823 ​ 1,344 8 ​ 4,3478 ​ 1,883 ​ 1,544 56,0 6,66 9 -18,3556 ​ 0,849 10 ​ ​ 0,663 11 ​ -34,1884 ​ 1,405 ​ 1,534 56,0 -7,95 12 4,9211 ​ 0,380 13 ​ 8,8430 ​ 1,543 ​ 1,642 22,5 72,24 14 10,1824 ​ 0,800 15 ​ ​ 0,110 ​ 1,517 64,2 - 16 ​ 2,880 17 ​ ​ - Note: The reference wavelength is 587.6 nm (d-line). The effective radius of aperture S1 (surface 3) is 2.345 mm. The effective radius of aperture S2 (surface 10) is 1.745 mm. The first optical element E1 is a refractive prism. The optical lens assembly for photography may further include an aperture stop and the position of the aperture stop can be adjusted according to the arrangement of the front reflecting element (the first optical element E1) or the cut edge(s) of the lens element(s). TABLE 5B Aspherical coefficients Surface# 1 2 4 5 6 7 k = -5,74960E-01 2,12778E+01 1,78173E+00 5,45783E+00 4,25869E+01 5,39066E+00 A4 = -2,788E-04 -1,873E-04 1,733E-03 -4,753E-05 1,628E-03 -1,613E-03 A6 = - - -1,998E-04 -3,300E-04 1,323E-04 2,791E-04 A8 = - - -1,765E-05 -4,936E-06 -8,296E-06 -3,160E-05 A10 = - - -5,263E-06 -5,935E-06 -3,950E-06 -8,424E-06 Surface# 8 9 11 12 13 14 k = -5,33291E-01 2,13223E+01 9,00000E+01 1,77319E+00 2,27908E+00 5,31478E+00 A4 = -4,618E-03 -2,756E-03 -1,705E-03 -1,939E-03 -1,358E-02 -1,352E-02 A6 = 1,408E-04 -4,209E-04 -2,515E-03 -1,595E-03 1,636E-03 1,611E-03 A8 = 2,067E-05 1,175E-04 3,846E-04 1,949E-04 -6,503E-05 -1,322E-04 A10 = 8,022E-08 -5,444E-06 -2,593E-05 -2,274E-05 -3,380E-06 8,580E-06

[0152] In the fifth embodiment, the equation of the aspherical surface profiles of the aforementioned optical elements is the same as the equation of the first embodiment. Also, the definitions of these parameters, which are shown in Table 5C below, are the same as those given in the first embodiment, with corresponding values for the fifth embodiment; therefore, an explanation thereof will not be given again here.

[0153] In addition, these parameters can be calculated as the following values from Table 5A and Table 5B and satisfy the following conditions: TABLE 5C Values of optical and physical parameters / Definitions f [mm] 14,17 (R7+R9) / (R7-R9) -0,77 f / EPDmax 2,72 (ΣAT+BL) / ΣCT 0,74 HFOV [Degree] 12,6 (CT2+CT3+CT4+CT5+CT6) / CT1 1,12 FOV [Degree] 25,2 10×CT3 / f 0,35 f / f1 0,59 10×CT3 / CT1 0,91 f4 / f 0,47 T23 / CT2 0,52 f / f23 -0,83 V5 / V6 2,49 f / f56 -1,68 N1 1,530 f / f5+f / f6 -1,59 N2 1,511 R 1 0 / f6 0,07 N4 1,544 |R7 / R1| 0,17 Y1R1 / ImgH 1,13 |R3 / R2| 0,18 (SAG1R1+SAG1R2) / ET1 0,01 |R7 / R2| 0,18 (SAG5R1+SAG5R2) / CT5 0,16 R12 / R7 2,34 ​ 0,05 ​ 1,59 ​ 0,86 ​ -2,49 - - 6. Embodiment

[0154] ​16 is a schematic cross-sectional view of an image capturing unit according to the sixth embodiment of the present disclosure, which corresponds to a diagonal direction of an effective light-sensitive area of an image sensor. ​ 17 is a schematic cross-sectional view of the image capturing unit according to the sixth embodiment of the present disclosure, which corresponds to a short side direction of the effective light-sensitive area of the image sensor, with a light path that is refracted by a first optical element. ​ 18 shows, in order from left to right, spherical aberration curves, astigmatic field curves, and a distortion curve of the image capturing unit according to the sixth embodiment. In ​ 16 and ​17 The image capturing unit 6 includes the optical lens assembly for photography (whose reference signs are omitted) of the present disclosure and an image sensor IS. The optical lens assembly for photography includes, in order from an object side to an image side along an optical path, a first optical element E1, an aperture S1, a second optical element E2, a third optical element E3, a fourth optical element E4, an aperture S2, a fifth optical element E5, a sixth optical element E6, a filter E7, and an image surface IMG. Additionally, the image sensor IS is formed as a rectangular element with an aspect ratio of 4:3, but the present disclosure is not limited thereto. For example, the image sensor IS can be formed as a rectangular element with an aspect ratio of 16:9 or as a rectangular element with an aspect ratio of 16:10.The optical lens assembly for photography includes six optical elements (E1, E2, E3, E4, E5, and E6), with no additional optical element arranged between any two of the six adjacent optical elements. To simplify the illustration of the refraction effect of the first optical element E1 on the light rays, in... ​ 16 the ray path bending effect caused by the first optical element E1 is not shown. The ray path bending effect of the first optical element E1 is shown in ​ 17.

[0155] The first optical element E1 with positive refractive power has an object-side surface that is convex in its paraxial region and an image-side surface that is concave in its paraxial region. The first optical element E1 is a prism made of plastic material, and both the object-side surface and the image-side surface are aspherical. The first optical element E1 with a beam path deflection function has a reflecting surface.

[0156] The second optical element E2 with negative refractive power has an object-side surface that is convex in its paraxial region and an image-side surface that is concave in its paraxial region. The second optical element E2 is a lens element made of plastic material, and both the object-side surface and the image-side surface are aspherical. The image-side surface of the second optical element E2 has a turning point.

[0157] The third optical element E3 with positive refractive power has an object-side surface that is convex in its paraxial region, and an image-side surface that is convex in its paraxial region. The third optical element E3 is a lens element made of plastic, and both the object-side surface and the image-side surface are aspherical. The object-side surface of the third optical element E3 has an inflection point. The image-side surface of the third optical element E3 has two inflection points.

[0158] The fourth optical element E4 with positive refractive power has an object-side surface that is convex in its paraxial region, and an image-side surface that is concave in its paraxial region. The fourth optical element E4 is a lens element made of plastic material, and both the object-side surface and the image-side surface are aspherical.

[0159] The fifth optical element E5 with negative refractive power has an object-side surface that is concave in its paraxial region, and an image-side surface that is concave in its paraxial region. The fifth optical element E5 is a lens element made of plastic material, and both the object-side surface and the image-side surface are aspherical.

[0160] The sixth optical element E6 with positive refractive power has an object-side surface that is convex in its paraxial region, and an image-side surface that is concave in its paraxial region. The sixth optical element E6 is a lens element made of plastic material, and both the object-side surface and the image-side surface are aspherical.

[0161] The filter E7 is made of glass material and is arranged between the sixth optical element E6 and the image surface IMG and does not affect the focal length of the optical lens assembly for photography. The image sensor IS is arranged on or near the image surface IMG of the optical lens assembly for photography.

[0162] The detailed optical data of the sixth embodiment are listed in Table 6A and the aspherical surface data are listed in Table 6B below. TABLE 6A 6. Embodiment f = 15.10 mm, f / EPDmax = 2.66, HFOV = 12.3 degrees Surface# Radius of curvature Thickness Material Index Abbe # Focal length 0 Objective Infinity Infinity 1 Optic 1 14,0845 (ASP) 5,320 Plastic 1,544 56,0 29,91 2 90,9091 (ASP) 0,830 3 Aperture Plano 0,218 4 Optic 2 7,3115 (ASP) 0,786 Plastic 1,529 45,4 -11,01 5 3,1216 (ASP) 0,382 6 Optic 3 6,9724 (ASP) 0,775 Plastic 1,544 55,9 11,04 7 -41,2793 (ASP) 0,200 8 Optic 4 3,2145 (ASP) 1,588 Plastic 1,544 56,0 9,20 9 7,4210 (ASP) 0,375 10 Aperture Plano 0,147 11 Optic 5 -14,1647 (ASP) 1,430 Plastic 1,639 23,5 -6,95 12 6,7239 (ASP) 3,336 13 Optic 6 7,3469 (ASP) 1,980 Plastic 1,697 16,3 28,94 14 10,2744 (ASP) 1,500 15 Filter Plano 0,110 Glass 1,517 64,2 - 16 Plano 1,401 17 Image Plano - Note: The reference wavelength is 587.6 nm (d-line). The effective radius of aperture S1 (surface 3) is 2.464 mm. The effective radius of aperture S2 (surface 10) is 1.813 mm. The first optical element E1 is a prism with refractive power. The optical lens assembly for photographing may further include an aperture stop, and the position of the aperture stop can be adjusted according to the arrangement of the front reflecting element (the first optical element E1) or the cut edge(s) of the lens element(s). TABLE 6B Aspherical coefficients Surface# 1 2 4 5 6 7 k = 5,73761E+00 9,00000E+01 6,07765E+00 5,97965E+00 3,38627E+01 8,60192E+01 A4 = -1,188E-04 -3,740E-05 -3,560E-03 2,413E-03 8,895E-04 9,706E-04 A6 = - - 6,682E-04 -3,083E-03 -1,896E-03 3,426E-04 A8 = - - -6,331E-05 6,773E-04 5,989E-04 -4,828E-05 A10 = - - 2,142E-06 -5,011E-05 -5,269E-05 -2,428E-06 Surface# 8 9 11 12 13 14 k = 2,11158E-01 8,25761E+00 7,08594E+01 5,05502E+00 1,51536E+00 4,75129E+00 A4 = 2,671E-03 -4,139E-03 -1,014E-02 -3,494E-03 -3,347E-03 -3,977E-03 A6 = -7,258E-04 1,435E-03 3,002E-03 1,621E-03 2,083E-04 2,184E-04 A8 = 3,188E-06 -3,393E-06 -3,482E-04 -2,940E-04 -5,759E-06 -4,848E-06 A10 = -9,499E-07 -2,267E-05 6,923E-06 7,022E-06 2,132E-09 1,018E-07

[0163] In the sixth embodiment, the equation of the aspherical surface profiles of the aforementioned optical elements is the same as the equation of the first embodiment. Also, the definitions of these parameters, which are shown in Table 6C below, are the same as those given in the first embodiment, with corresponding values for the sixth embodiment; therefore, an explanation thereof will not be given again here.

[0164] In addition, these parameters can be calculated from Table 6A and Table 6B as the following values and satisfy the following conditions: TABLE 6C Values of Optical and Physical Parameters / Definitions f [mm] 15,10 (R7 + R9) / (R7 - R9) -0,63 f / EPDmax 2,66 (ΣAT + BL) / ΣCT 0,72 HFOV [Degree] 12,3 (CT2 + CT3 + CT4 + CT5 + CT6) / CT1 1,23 FOV [Degree] 24,6 10×CT3 / f 0,51 f / f1 0,51 10×CT3 / CT1 1,46 f4 / f 0,61 T23 / CT2 0,49 f / f23 0,0020 V5 / V6 1,44 f / f56 -1,55 N1 1,544 f / f5 + f / f6 -1,65 N2 1,529 R 1 0 / f6 0,23 N4 1,544 |R7 / R1| 0,23 Y1R1 / ImgH 1,13 |R3 / R2| 0,08 (SAG1R1 + SAG1R2) / ET1 0,10 |R7 / R2| 0,04 (SAG5R1 + SAG5R2) / CT5 0,10 R12 / R7 3,20 SAG6R2 / CT6 0,15 (|R7| + |R9|) / |R2| 0,19 P1TL / TL 0,87 (R3 + R12) / (R3 - R12) -5,94 - - 7th Embodiment

[0165] Fig. 19 is a schematic cross-sectional view of an image capturing unit according to the seventh embodiment of the present disclosure, which corresponds to a diagonal direction of an effective light-sensitive area of an image sensor. Fig.20 is a schematic cross-sectional view of the image capturing unit according to the seventh embodiment of the present disclosure, which corresponds to a short side direction of the effective light-sensitive area of the image sensor, with a light path deflected by a first optical element. Fig. 21 shows, in order from left to right, spherical aberration curves, astigmatic field curves, and a distortion curve of the image capturing unit according to the seventh embodiment. In Fig. 19 and Fig.20 The image capturing unit 7 includes the photographic optical lens assembly (the reference signs thereof are omitted) of the present disclosure and an image sensor IS. The photographic optical lens assembly includes, in order from an object side to an image side along an optical path, a first optical element E1, an aperture S1, a second optical element E2, a third optical element E3, a fourth optical element E4, an aperture S2, a fifth optical element E5, a sixth optical element E6, a filter E7, and an image surface IMG. Additionally, the image sensor IS is formed as a rectangular element with an aspect ratio of 4:3, but the present disclosure is not limited thereto. For example, the image sensor IS may be formed as a rectangular element with an aspect ratio of 16:9 or as a rectangular element with an aspect ratio of 16:10.The optical lens assembly for photography includes six optical elements (E1, E2, E3, E4, E5, and E6), with no additional optical element arranged between any of the six adjacent optical elements. To simplify the illustration of the refraction effect of the first optical element E1 on the light rays, in... Fig. 19, the ray bending effect caused by the first optical element E1 is not shown. The ray bending effect of the first optical element E1 is shown in Fig. 20.

[0166] The first optical element E1 with positive refractive power has an object-side surface that is convex in its paraxial region, and an image-side surface that is concave in its paraxial region. The first optical element E1 is a prism made of plastic material, and both the object-side surface and the image-side surface are aspherical. The first optical element E1 with a beam path deflection function has a reflecting surface.

[0167] The second optical element E2 with positive refractive power has an object-side surface that is convex in its paraxial region, and an image-side surface that is convex in its paraxial region. The second optical element E2 is a lens element made of plastic material, and both the object-side surface and the image-side surface are aspherical. The object-side surface of the second optical element E2 has an inflection point.

[0168] The third optical element E3 with negative refractive power has an object-side surface that is concave in its paraxial region, and an image-side surface that is concave in its paraxial region. The third optical element E3 is a lens element made of plastic material, and both the object-side surface and the image-side surface are aspherical.

[0169] The fourth optical element E4 with positive refractive power has an object-side surface that is convex in its paraxial region, and an image-side surface that is concave in its paraxial region. The fourth optical element E4 is a lens element made of plastic material, and both the object-side surface and the image-side surface are aspherical. The image-side surface of the fourth optical element E4 has two inflection points.

[0170] The fifth optical element E5 with negative refractive power has an object-side surface that is concave in its paraxial region, and an image-side surface that is convex in its paraxial region. The fifth optical element E5 is a lens element made of plastic material, and both the object-side surface and the image-side surface are aspherical.

[0171] The sixth optical element E6 with negative refractive power has an object-side surface that is concave in the paraxial region and an image-side surface that is concave in the paraxial region. The sixth optical element E6 is a lens element made of plastic material, and both the object-side surface and the image-side surface are aspherical. The image-side surface of the sixth optical element E6 has two inflection points.

[0172] The filter E7 is made of glass material and is arranged between the sixth optical element E6 and the image surface IMG and has no influence on the focal length of the optical lens assembly for photography. The image sensor IS is arranged on or near the image surface IMG of the optical lens assembly for photography.

[0173] The detailed optical data of the seventh embodiment are listed in Table 7A and the aspherical surface data are listed in Table 7B below. TABLE 7A 7. Embodiment f = 13.85 mm, f / EPDmax = 2.68, HFOV = 12.7 Degree Surface# Radius of Curvature Thickness Material Index Abbe # Focal Length 0 Objective Infinity Infinity 1 Optic 1 11,0679 (ASP) 5,380 Plastic 1,544 56,0 24,42 2 54,9566 (ASP) 1,040 3 Aperture Plano -0,240 4 Optic 2 5,9432 (ASP) 0,931 Plastic 1,544 56,0 10,04 5 -63,4745 (ASP) 0,259 6 Optic 3 -6,1339 (ASP) 0,500 Plastic 1,614 26,0 -5,23 7 6,9375 (ASP) 1,618 8 Optic 4 3,0799 (ASP) 1,700 Plastic 1,566 37,4 5,69 9 57,2441 (ASP) 0,945 10 Aperture Plano 0,392 11 Optic 5 -9,8032 (ASP) 1,293 Plastic 1,511 56,8 -22,14 12 -76,9231 (ASP) 0,157 13 Optic 6 -21,2800 (ASP) 0,663 Plastic 1,566 37,4 -14,47 14 13,4599 (ASP) 0,800 15 Filter Plano 0,110 Glass 1,517 64,2 - 16 Plano 3,136 17 Image Plano - Note: The reference wavelength is 587.6 nm (d-line). The effective radius of aperture S1 (surface 3) is 2.103 mm. The effective radius of aperture S2 (surface 10) is 1.620 mm. The first optical element E1 is a prism with refractive power. The optical lens assembly for photographing may further include an aperture stop and the position of the aperture stop can be adjusted according to the arrangement of the front reflecting element (the first optical element E1) or the cut edge(s) of the lens element(s). TABLE 7B Aspherical coefficients Surface# 1 2 4 5 6 7 k = -9,67928E-01 7,86992E+01 1,72735E+00 8,63813E+01 1,96569E+01 6,82942E+00 A4 = -2,058E-04 5,390E-04 2,422E-03 3,973E-03 1,887E-03 -2,606E-03 A6 = - - -2,757E-04 -1,890E-03 2,197E-04 1,052E-03 A8 = - - -4,943E-05 1,694E-04 -1,029E-04 -1,994E-04 A10 = - - 9,380E-07 -8,186E-06 4,476E-06 -1,389E-05 Surface# 8 9 11 12 13 14 k = -4,54942E-01 9,00000E+01 1,59753E+00 9,00000E+01 7,07441E+01 2,38083E+01 A4 = -6,453E-03 -2,500E-03 -4,498E-03 -3,098E-03 -2,289E-02 -2,089E-02 A6 = 7,614E-04 -1,154E-04 -3,603E-03 -6,821E-03 2,089E-03 5,790E-03 A8 = -2,671E-05 1,888E-04 8,777E-04 9,160E-04 8,553E-05 -4,646E-04 A10 = 3,765E-06 -1,128E-05 -1,076E-04 -5,439E-05 -3,854E-05 2,931E-07

[0174] In the seventh embodiment, the equation of the aspherical surface profiles of the aforementioned optical elements is the same as that of the first embodiment. Also, the definitions of these parameters, which are shown in Table 7C below, are the same as those specified in the first embodiment, with corresponding values for the seventh embodiment; therefore, an explanation in this regard will not be given again.

[0175] In addition, these parameters can be calculated as the following values from Table 7A and Table 7B and satisfy the following conditions: TABLE 7C Values of optical and physical parameters / definitions f [mm] 13,85 (R7 + R9) / (R7 - R9) -0,52 f / EPDmax 2,68 (ΣAT + BL) / ΣCT 0,79 HFOV [Degrees] 12,7 (CT2 + CT3 + CT4 + CT5 + CT6) / CT1 0,95 [[ID= 25,4 ​ 0,36 ​ 0,57 ​ 0,93 ​ 0,41 ​ 0,28 ​ -1,02 ​ 1,52 ​ -1,64 N1 1,544 ​ -1,58 N2 1,544 ​ 5,32 N4 1,566 ​ 0,28 ​ 1,16 ​ 0,11 ​ 0,13 ​ 0,06 ​ -0,32 ​ 4,37 ​ 0,13 ​ 0,23 ​ 0,85 ​ -2,58 - - 8th Embodiment

[0176] ​22 is a schematic cross-sectional view of an image capturing unit according to the eighth embodiment of the present disclosure, which corresponds to a diagonal direction of an effective light-sensitive area of an image sensor. ​ 23 is a schematic cross-sectional view of the image capturing unit according to the eighth embodiment of the present disclosure, which corresponds to a short side direction of the effective light-sensitive area of the image sensor, with a light path that is refracted by a first optical element. ​ 24 shows, in order from left to right, spherical aberration curves, astigmatic field curves, and a distortion curve of the image capturing unit according to the eighth embodiment. In ​ 22 and ​23 The image capturing unit 8 includes the photographic optical lens assembly (the reference signs thereof are omitted) of the present disclosure and an image sensor IS. The photographic optical lens assembly includes, in order from an object side to an image side along an optical path, a first optical element E1, an aperture S1, a second optical element E2, a third optical element E3, a fourth optical element E4, an aperture S2, a fifth optical element E5, a sixth optical element E6, a filter E7, and an image surface IMG. Additionally, the image sensor IS is formed as a rectangular element with an aspect ratio of 4:3, but the present disclosure is not limited thereto. For example, the image sensor IS may be formed as a rectangular element with an aspect ratio of 16:9 or as a rectangular element with an aspect ratio of 16:10.The optical lens assembly for photography includes six optical elements (E1, E2, E3, E4, E5, and E6), with no additional optical element arranged between any two of the six adjacent optical elements. To simplify the illustration of the refraction effect of the first optical element E1 on the light rays, in... ​ 22, the ray bending effect caused by the first optical element E1 is not shown. The ray bending effect of the first optical element E1 is shown in ​ 23.

[0177] The first optical element E1 with positive refractive power has an object-side surface that is convex in its paraxial region, and an image-side surface that is concave in its paraxial region. The first optical element E1 is a prism made of glass material, and both the object-side surface and the image-side surface are aspherical. The image-side surface of the first optical element E1 has an inflection point. The first optical element E1 with a beam path deflection function has a reflecting surface.

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

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

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

[0181] The fifth optical element E5 with negative refractive power has an object-side surface that is concave in its paraxial region, and an image-side surface that is concave in its paraxial region. The fifth optical element E5 is a lens element made of plastic material, and both the object-side surface and the image-side surface are aspherical. The image-side surface of the fifth optical element E5 has an inflection point.

[0182] The sixth optical element E6 with positive refractive power has an object-side surface that is convex in its paraxial region, and an image-side surface that is concave in its paraxial region. The sixth optical element E6 is a lens element made of plastic material, and both the object-side surface and the image-side surface are aspherical. The object-side surface of the sixth optical element E6 has two inflection points. The image-side surface of the sixth optical element E6 has two inflection points.

[0183] The filter E7 is made of glass material and is arranged between the sixth optical element E6 and the image surface IMG and has no influence on the focal length of the optical lens assembly for photography. The image sensor IS is arranged on or near the image surface IMG of the optical lens assembly for photography.

[0184] The detailed optical data of the eighth embodiment are listed in Table 8A and the aspherical surface data are listed in Table 8B below. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 0 ​ ​ ​ 1 ​ 17,2775 ​ 5,382 ​ 1,589 61,3 36,60 2 76,9231 ​ 1,132 3 ​ Plano -0,412 4 Optic 2 4,4950 (ASP) 1,163 Glass 1,517 64,2 10,26 5 26,8829 (ASP) 0,370 6 Optic 3 -6,9369 (ASP) 0,500 Plastic 1,566 37,4 -6,09 7 7,0381 (ASP) 1,507 8 Optic 4 3,2521 (ASP) 1,830 Glass 1,569 56,0 7,17 9 12,8032 (ASP) 1,451 10 Aperture Plano 0,484 11 Optic 5 -15,0162 (ASP) 0,693 Plastic 1,566 37,4 -9,59 12 8,6506 (ASP) 0,719 13 Optic 6 8,4506 (ASP) 1,036 Plastic 1,669 19,5 33,43 14 12,9160 (ASP) 0,800 15 Filter Plano 0,110 Glass 1,517 64,2 - 16 Plano 2,944 17 Image Plano - Note: The reference wavelength is 587.6 nm (d-line). The effective radius of aperture S1 (surface 3) is 2.527 mm. The effective radius of aperture S2 (surface 10) is 1.830 mm. The first optical element E1 is a prism with refractive power. The optical lens assembly for photography may further include an aperture stop and the position of the aperture stop can be adjusted depending on the arrangement of the front reflecting element (the first optical element E1) or the cut edge(s) of the lens element(s). TABLE 8B Aspherical Coefficients Surface# 1 2 4 5 6 7 k = 1,47768E+00 8,56453E+01 1,69842E+00 1 , 80599E +01 1,92223E+01 4,61292E+00 A4 = -8,838E-05 -2,411E-04 1,709E-03 -1,174E-04 2,057E-03 -5,583E-04 A6 = 2,844E-06 -6,471E-06 -1,252E-04 -3,201E-04 -2,822E-04 -3,199E-04 A8 = - - -1,775E-05 -4,840E-05 3,700E-05 8,939E-05 A10 = - - -2,956E-06 2,557E-06 -7,169E-06 -1,975E-05 A12 = - - -7,075E-08 - 3,957E-07 5,156E-07 Surface# 8 9 11 12 13 14 k = -5,72790E-01 2,12907E+01 5,70433E+00 8,04004E+00 1,12365E+00 1,21070E+01 A4 = -5,130E-03 -2,962E-03 -9,072E-03 -9,880E-03 -1,671E-02 -1,620E-02 A6 = 3,629E-04 -4,878E-04 -1,921E-03 7,928E-04 3,550E-03 2,599E-03 A8 = -1,611E-05 8,222E-05 -1,973E-04 -8,489E-04 -6,026E-04 -3,245E-04 A10 = 2,985E-06 -3,345E-07 1,286E-04 2,512E-04 7,879E-05 3,423E-05 A12 = - - -1,092E-05 -3,108E-05 -4,108E-06 -1,313E-06 A14 = - - - 1,413E-06 - -

[0185] In the eighth embodiment, the equation of the aspherical surface profiles of the aforementioned optical elements is the same as that of the first embodiment. Also, the definitions of these parameters, which are shown in Table 8C below, are the same as those given in the first embodiment, with corresponding values for the eighth embodiment; therefore, an explanation thereof will not be given again here.

[0186] In addition, these parameters can be calculated as the following values from Table 8A and Table 8B and satisfy the following conditions: TABLE 8C Values of Optical and Physical Parameters / Definitions f [mm] 14,56 (R7+R9) / (R7-R9) -0,64 f / EPDmax 2,48 (ΣAT+BL) / ΣCT 0,86 HFOV [Degree] 13,0 (CT2+CT3+CT4+CT5+CT6) / CT1 0,97 FOV [Degree] 26,0 10×CT3 / f 0,34 f / f1 0,40 10×CT3 / CT1 0,93 f4 / f 0,49 T23 / CT2 0,32 [[ID= -0,64 ​ 1,92 ​ -1,09 N1 1,589 f / f5 + f / f6 -1,08 N2 1,517 R 1 0 / f6 0,26 N4 1,569 |R7 / R1| 0,19 Y1R1 / ImgH 1,20 |R3 / R2| 0,06 (SAG1R1 + SAG1R2) / ET1 0,10 |R7 / R2| 0,04 (SAG5R1 + SAG5R2) / CT5 -0,26 R12 / R7 3,97 SAG6R2 / CT6 0,03 (|R7| + |R9|) / |R2| 0,24 P1TL / TL 0,86 (R3 + R12) / (R3 - R12) -2,07 - - 9. Embodiment

[0187] Fig.25 is a schematic cross-sectional view of an image capturing unit according to the ninth embodiment of the present disclosure, which corresponds to a diagonal direction of an effective light-sensitive area of an image sensor. Fig. 26 is a schematic cross-sectional view of the image capturing unit according to the ninth embodiment of the present disclosure, which corresponds to a short side direction of the effective light-sensitive area of the image sensor, with a light path deflected by a first optical element. Fig. 27 shows, in order from left to right, spherical aberration curves, astigmatic field curves, and a distortion curve of the image capturing unit according to the ninth embodiment. In Fig. 25 and Fig.26 The image capturing unit 9 includes the optical lens assembly for photography (the reference signs thereof are omitted) of the present disclosure and an image sensor IS. The optical lens assembly for photography includes, in order from an object side to an image side along an optical path, a first optical element E1, an aperture S1, a second optical element E2, a third optical element E3, a fourth optical element E4, an aperture S2, a fifth optical element E5, a sixth optical element E6, a filter E7, and an image surface IMG. Additionally, the image sensor IS is formed as a rectangular element with an aspect ratio of 4:3, but the present disclosure is not limited thereto. For example, the image sensor IS may be formed as a rectangular element with an aspect ratio of 16:9 or as a rectangular element with an aspect ratio of 16:10.The optical lens assembly for photography includes six optical elements (E1, E2, E3, E4, E5, and E6), and no additional optical element is arranged between any two adjacent ones of the six optical elements. To simplify the illustration of the refraction effect of the first optical element E1 on the light rays, in... Fig. 25 the ray bending effect caused by the first optical element E1 is not shown. The ray bending effect of the first optical element E1 is shown in Fig. 26.

[0188] The first optical element E1 with positive refractive power has an object-side surface that is convex in its paraxial region, and an image-side surface that is convex in its paraxial region. The first optical element E1 is a prism made of plastic material, and both the object-side surface and the image-side surface are aspherical. The first optical element E1 with a beam path deflection function has a reflective surface.

[0189] The second optical element E2 with positive refractive power has a convex object-side surface in a paraxial region thereof and a concave image-side surface in a paraxial region thereof. The second optical element E2 is a lens element made of a plastic material, and both the object-side surface and the image-side surface are aspherical. The object-side surface of the second optical element E2 has an inflection point. The image-side surface of the second optical element E2 has an inflection point.

[0190] The third optical element E3 with negative refractive power has an object-side surface that is concave in its paraxial region, and an image-side surface that is concave in its paraxial region. The third optical element E3 is a lens element made of plastic material, and both the object-side surface and the image-side surface are aspherical. The object-side surface of the third optical element E3 has two inflection points.

[0191] The fourth optical element E4 with positive refractive power has an object-side surface that is convex in its paraxial region, and an image-side surface that is concave in its paraxial region. The fourth optical element E4 is a lens element made of plastic material, and both the object-side surface and the image-side surface are aspherical. The image-side surface of the fourth optical element E4 has an inflection point.

[0192] The fifth optical element E5 with negative refractive power has an object-side surface that is convex in its paraxial region, and an image-side surface that is concave in its paraxial region. The fifth optical element E5 is a lens element made of plastic material, and both the object-side surface and the image-side surface are aspherical. The object-side surface of the fifth optical element E5 has an inflection point. The image-side surface of the fifth optical element E5 has an inflection point.

[0193] The sixth optical element E6 with negative refractive power has an object-side surface that is convex in its paraxial region, and an image-side surface that is concave in its paraxial region. The sixth optical element E6 is a lens element made of plastic material and both its object-side surface and its image-side surface are aspherical. The object-side surface of the sixth optical element E6 has two inflection points. The image-side surface of the sixth optical element E6 has two inflection points.

[0194] The filter E7 is made of glass material and is arranged between the sixth optical element E6 and the image surface IMG and has no influence on the focal length of the optical lens assembly for photography. The image sensor IS is arranged on or near the image surface IMG of the optical lens assembly for photography.

[0195] The detailed optical data of the ninth embodiment are listed in Table 9A and the aspherical surface data are listed in Table 9B below. TABELLE 9A 9. Embodiment f = 15.60 mm, f / EPDmax = 2.80, HFOV = 11.6 Degrees Surface# Radius of Curvature Thickness Material Index Abbe # Focal Length 0 Objective Infinity Infinity 1 Optic 1 16,6427 (ASP) 5,494 Plastic 1,534 56,0 24,25 2 -51,7468 (ASP) 0,650 3 Aperture Plano 1,350 4 Optic 2 4,8933 (ASP) 0,899 Plastic 1,544 55,9 12,21 5 17,4313 (ASP) 0,356 6 Optic 3 -8,3813 (ASP) 0,466 Plastic 1,584 28,2 -6,38 7 6,8475 (ASP) 1,913 8 Optic 4 3,7721 (ASP) 1,883 Plastic 1,551 44,8 7,50 9 35,7715 (ASP) 0,251 10 Aperture Plano 0,071 11 Optic 5 20,9831 (ASP) 1,401 Plastic 1,511 56,8 -12,83 12 4,8803 (ASP) 2,081 13 Optic 6 9,1104 (ASP) 1,562 Plastic 1,615 25,4 -1591,26 14 8,4372 (ASP) 0,800 15 Filter Plano 0,110 Glass 1,517 64,2 - 16 Plano 2,510 17 Image Plano - Note: The reference wavelength is 587.6 nm (d-line). The effective radius of aperture S1 (surface 3) is 2.419 mm. The effective radius of aperture S2 (surface 10) is 1.778 mm. The first optical element E1 is a prism with refractive power. The optical lens assembly for photography may further include an aperture stop and the position of the aperture stop may depend on the Arrangement- adjustment of the front reflecting element (the first optical element E1) or the cut edge(s) of the lens element(s) is / are set. TABLE 9B Aspherical Coefficients Surface# 1 2 4 5 6 7 k = -4,22200E-01 7,14858E+01 2,01921E+00 -2,48970E-01 2,79144E+01 5,51371E+00 A4 = -1,498E-04 -1,900E-04 1,911E-03 1,980E-03 1,768E-03 -3,227E-03 A6 = - - -2,923E-04 -1,059E-03 4,168E-04 1,086E-03 A8 = - - -3,702E-05 6,609E-05 -9,416E-05 -2,103E-04 A10 = - - -1,078E-06 -5,022E-06 3,266E-06 -1,944E-07 Surface# 8 9 11 12 13 14 k = -4,34262E-01 2,82413E+01 6,27052E+01 1,52541E+00 4,73582E+00 4,47192E+00 A4 = -5,845E-03 -3,419E-03 -3,775E-03 -4,450E-03 -9,892E-03 -1,110E-02 A6 = 5,236E-04 -4,583E-04 -1,381E-03 -2,693E-04 8,280E-04 1,049E-03 A8 = 2,956E-05 2,785E-04 2,031E-04 -1,501E-04 -2,332E-05 -6,170E-05 A10 = -4,090E-06 -3,390E-05 -3,313E-05 1,480E-05 1,021E-06 3,709E-06

[0196] In the ninth embodiment, the equation of the aspherical surface profiles of the aforementioned optical elements is the same as that of the first embodiment. Also, the definitions of these parameters, which are shown in Table 9C below, are the same as those specified in the first embodiment, with corresponding values for the ninth embodiment; therefore, an explanation thereof will not be given again.

[0197] In addition, these parameters can be calculated as the following values from Table 9A and Table 9B and satisfy the following conditions: TABLE 9C Values of the optical and physical parameters / Definitions f [mm] 15,60 (R7+R9) / (R7-R9) -1,44 f / EPDmax 2,80 (ΣAT+BL) / ΣCT 0,86 HFOV [Degree] 11,6 (CT2+CT3+CT4+CT5+CT6) / CT1 1,13 FOV [Degree] 23,2 10×CT3 / f 0,30 f / f1 0,64 10×CT3 / CT1 0,85 f4 / f 0,48 T23 / CT2 0,40 f / f23 -0,91 V5 / V6 2,24 f / f56 -1,31 N1 1,534 f / f5+f / f6 -1,23 N2 1,544 R 1 0 / f6 -0,0031 N4 1,551 |R7 / R1| 0,23 Y1R1 / ImgH 1,14 |R3 / R2| 0,09 (SAG1R1+SAG1R2) / ET1 0,06 |R7 / R2| 0,07 (SAG5R1+SAG5R2) / CT5 0,24 R12 / R7 2,24 SAG6R2 / CT6 0,12 (|R7|+|R9|) / |R2| 0,48 P1TL / TL 0,87 (R3+R12) / (R3-R12) -3,76 - - 10th embodiment

[0198] Fig.28 is a schematic cross-sectional view of an image capturing unit according to the tenth embodiment of the present disclosure, which corresponds to a diagonal direction of an effective light-sensitive area of an image sensor. Fig. 29 is a schematic cross-sectional view of the image capturing unit according to the tenth embodiment of the present disclosure, which corresponds to a short side direction of the effective light-sensitive area of the image sensor, with a light path that is refracted by a first optical element. Fig. 30 shows, in order from left to right, spherical aberration curves, astigmatic field curves, and a distortion curve of the image capturing unit according to the tenth embodiment. In Fig. 28 and Fig.29 The image acquisition unit 10 includes the optical lens assembly for photography (the reference signs thereof are omitted) of the present disclosure and an image sensor IS. The optical lens assembly for photography includes, in order from an object side to an image side along an optical path, a first optical element E1, an aperture S1, a second optical element E2, a third optical element E3, a fourth optical element E4, an aperture S2, a fifth optical element E5, a sixth optical element E6, a filter E7, and an image surface IMG. Additionally, the image sensor IS is formed as a rectangular element with an aspect ratio of 4:3, but the present disclosure is not limited thereto. For example, the image sensor IS can be formed as a rectangular element with an aspect ratio of 16:9 or as a rectangular element with an aspect ratio of 16:10.The optical lens assembly for photography includes six optical elements (E1, E2, E3, E4, E5, and E6), with no additional optical element arranged between any two of the six adjacent optical elements. To simplify the illustration of the refraction effect of the first optical element E1 on the light rays, in... Fig. the ray bending effect caused by the first optical element E1 in 28 is not shown. The ray bending effect of the first optical element E1 is shown in Fig. 29.

[0199] The first optical element E1 with positive refractive power has an object-side surface that is convex in its paraxial region, and an image-side surface that is concave in its paraxial region. The first optical element E1 is a prism made of plastic material, and both the object-side surface and the image-side surface are aspherical. The first optical element E1 with a beam path deflection function has a reflecting surface.

[0200] The second optical element E2 with positive refractive power has an object-side surface that is convex in its paraxial region, and an image-side surface that is concave in its paraxial region. The second optical element E2 is a lens element made of plastic material, and both the object-side surface and the image-side surface are aspherical. The object-side surface of the second optical element E2 has an inflection point. The image-side surface of the second optical element E2 has an inflection point.

[0201] The third optical element E3 with negative refractive power has an object-side surface that is concave in its paraxial region, and an image-side surface that is concave in its paraxial region. The third optical element E3 is a lens element made of plastic material, and both the object-side surface and the image-side surface are aspherical. The object-side surface of the third optical element E3 has two inflection points.

[0202] The fourth optical element E4 with positive refractive power has an object-side surface that is convex in its paraxial region, and an image-side surface that is concave in its paraxial region. The fourth optical element E4 is a lens element made of plastic material, and both the object-side surface and the image-side surface are aspherical. The image-side surface of the fourth optical element E4 has an inflection point.

[0203] The fifth optical element E5 with negative refractive power has an object-side surface that is concave in its paraxial region, and an image-side surface that is concave in its paraxial region. The fifth optical element E5 is a lens element made of plastic material, and both the object-side surface and the image-side surface are aspherical. The image-side surface of the fifth optical element E5 has an inflection point.

[0204] The sixth optical element E6 with positive refractive power has an object-side surface that is convex in its paraxial region and an image-side surface that is concave in its paraxial region. The sixth optical element E6 is a lens element made of plastic material and both its object-side surface and its image-side surface are aspherical. The object-side surface of the sixth optical element E6 has an inflection point. The image-side surface of the sixth optical element E6 has an inflection point.

[0205] The filter E7 is made of glass material and is arranged between the sixth optical element E6 and the image surface IMG and does not affect the focal length of the photographic optical lens unit. The image sensor IS is arranged on or near the image surface IMG of the photographic optical lens unit.

[0206] The detailed optical data of the tenth embodiment are listed in Table 10A and the data of the aspherical surface are listed in Table 10B below. TABLE 10A 10. Embodiment f = 14.84 mm, f / EPDmax = 2.68, HFOV = 12.0 Degree Surface# Curvature Radius Thickness Material Index Abbe # Focal Length 0 Objective Infinity Infinity 1 Optic 1 14,6599 (ASP) 5,329 Plastic 1,511 56,8 42,11 2 40,3587 (ASP) 1,080 3 Aperture Stop Plano 0,041 4 Optic 2 4,6731 (ASP) 0,771 Plastic 1,544 56,0 24,23 5 6,8182 (ASP) 0,344 6 Optic 3 - 524,3971 (ASP) 0,430 Plastic 1,660 20,4 -20,49 7 13,8874 (ASP) 2,183 8 Optic 4 4,3303 (ASP) 1,620 Plastic 1,544 56,0 10,90 9 13,9256 (ASP) 2,412 10 Aperture Stop Plano 0,888 11 Optic ⑤ -16,6889 (ASP) 0,910 Plastic 1,566 37,4 -9,38 12 7,9412 (ASP) 0,171 13 Optic ⑥ 11,3125 (ASP) 1,470 Plastic 1,697 16,3 57,00 14 14,9704 (ASP) 1,500 15 Filter Plano 0,110 Glass 1,517 64,2 - 16 Plano 0,996 17 Image Plano - Note: The reference wavelength is 587.6 nm (d-line). The effective radius of aperture S1 (surface 3) is 2.365 mm. The effective radius of aperture S2 (surface 10) is 1.860 mm. The first optical element E1 is a refractive prism. The optical lens assembly for photographing may further include an aperture stop and the position of the aperture stop can be adjusted according to the arrangement of the front reflecting element (the first optical element E1) or the cut edge(s) of the lens element(s). TABLE 10B Aspherical Coefficients Surface# 1 2 4 5 6 7 k = 1,59009E+00 3,38164E+01 2,59541 E+00 1,00150E+01 9,00000E+01 1,42072E+01 A4 = 1,132E-04 8,062E-05 6,386E-04 -5,634E-04 -1,039E-03 -1,711E-03 A6 = - - -1,367E-04 -2,479E-04 7,599E-04 6,767E-04 A8 = - - -4,256E-05 -3,871E-05 -1,076E-04 -9,404E-05 A10 = - - 2,703E-06 3,480E-06 4,007E-06 2,450E-06 Surface# 8 9 11 12 13 14 k = -7,01437E-01 1,42996E+01 1,39787E+01 5,77309E+00 3,16964E+00 6,95432E+00 A4 = -2,189E-03 -3,518E-03 -1,189E-02 -1,182E-02 -1,033E-02 -9,787E-03 A6 = -1,928E-05 -2,054E-04 -1,324E-03 -3,103E-04 1,411E-03 1,139E-03 A8 = -4,619E-06 8,405E-06 1,436E-04 1,103E-04 -1,337E-04 -8,096E-05 A10 = -9,093E-08 -5,101E-07 7,363E-06 -7,054E-06 3,948E-06 1,878E-06

[0207] In the tenth embodiment, the equation of the aspherical surface profiles of the aforementioned optical elements is the same as the equation of the first embodiment. Also, the definitions of these parameters, which are shown in Table 10C below, are the same as those given in the first embodiment, with corresponding values for the tenth embodiment; therefore, an explanation thereof will not be given again.

[0208] In addition, these parameters can be calculated as the following values from Table 10A and Table 10B and satisfy the following conditions: TABLE 10C Values of Optical and Physical Parameters / Definitions f [mm] 14,84 (R7+R9) / (R7-R9) -0,59 f / EPDmax 2,68 (ΣAT+BL) / ΣCT 0,92 HFOV [Degree] 12,0 (CT2+CT3+CT4+CT5+CT6) / CT1 0,98 FOV [Degree] 24,0 0,29 10×CT3 / f 0,35 f / f1 0,81 10×CT3 / CT1 0,73 f4 / f 0,45 T23 / CT2 -0,05 f / f23 2,29 V5 / V6 -1,38 N1 1,511 f / f56 -1,32 N2 1,544 [[ID=X]]f / f5+f / f6 0,14 N4 1,544 R 1 0 / f6 0,30 |R7 / R1| 1,20 Y1R1 / ImgH 0,12 |R3 / R2| 0,13 (SAG1R1+SAG1R2) / ET1 0,11 |R7 / R2| -0,23 (SAG5R1+SAG5R2) / CT5 3,46 R12 / R7 0,01 SAG6R2 / CT6 0,52 (|R7|+|R9|) / |R2| 0,86 P1TL / TL -1,91 - - 11. Embodiment

[0209] (R3+R12) / (R3-R12)31 is a perspective view of an image capturing unit according to the eleventh embodiment of the present disclosure. In this embodiment, an image capturing unit 100 is a camera module that includes an optical lens unit 101, a driving device 102, an image sensor 103, and an image stabilizer 104. The optical lens unit 101 includes the optical lens assembly for photographing, as disclosed in the first embodiment, a tube, and a holding element (reference signs thereof are omitted) for holding the optical lens assembly for photographing. However, the optical lens unit 101 may alternatively be provided with the optical lens assembly for photographing, as disclosed in other embodiments of the present disclosure, and the present disclosure is not limited thereto.The imaging light is bundled in the lens unit 101 of the image capturing 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 transferred to another electronic component for further processing.

[0210] The drive device 102 may have an autofocus function, and various drive configurations can be achieved using lead screws, voice coil motors (VCMs), microelectromechanical systems (MEMS), piezoelectric systems, shape memory alloys, spring-like or ball-like drive systems, but the present disclosure is not limited thereto. The drive device 102 is advantageous for obtaining a better imaging position for the lens unit 101, so that a clear image of the imaged object can be captured by the lens unit 101 with different object distances. The image sensor 103 (for example, CMOS or CCD), which can have high light sensitivity and low noise, is arranged on the image surface of the optical lens assembly for photography to achieve higher image quality.

[0211] The image stabilizer 104, such as an acceleration meter, a gyro sensor, and a Hall effect sensor, is configured to cooperate with the drive device 102 to provide optical image stabilization (OIS). The drive device 102 that cooperates with the image stabilizer 104 is advantageous for compensating for the rotation and inclination of the lens unit 101 to reduce motion blur during exposure. In some cases, the compensation can be provided by electronic image stabilization (EIS) with image processing software, thereby improving the image quality in dynamic scenarios and under poor lighting conditions. Some movable elements in the image capturing unit 100 can be driven by the drive device 102 to compensate for the image inclination in real time, thereby achieving optical image stabilization.For example, the drive device 102 can drive the movable elements, such as the movable group of the optical lens assembly for photography and the image sensor 103, to move in directions parallel to, inclined to, or perpendicular to the optical axis. However, the present disclosure is not limited to the drive configurations mentioned above. 12. Embodiment

[0212] Fig. 32 is a perspective view of an electronic device according to the twelfth embodiment of the present disclosure, Fig. 33 is another perspective view of the electronic device in Fig. 32 and Fig. 34 is a block diagram of the electronic device in Fig. Fig. Note: There seems to be a typo in the original text where 'f / f5+f / f6' is written as 'X' in the translation. It should be translated as 'f / f5 + f / f6' as in the original. 32.

[0213] In this embodiment, an electronic device 200 is a smartphone that includes the image capturing unit 100 according to the eleventh embodiment, an image capturing unit 100a, an image capturing unit 100b, an image capturing unit 100c, an image capturing unit 100d, an image capturing unit 100e, a flash module 201, a focusing assist module 202, an image signal processor 203, a display module 204, and an image software processor 205. The image capturing unit 100, the image capturing unit 100a, and the image capturing unit 100b are arranged on the same side of the electronic device 200, and each of the image capturing units 100, 100a, and 100b has a single focal point. The focusing assist module 202 can be a laser distance meter or a time-of-flight module, but the present disclosure is not limited thereto.The image capturing unit 100c, the image capturing unit 100d, the image capturing unit 100e, and the display module 204 are arranged on the opposite side of the electronic device 200, and the display module 204 can be a user interface to allow the image capturing units 100c, 100d, and 100e to serve as front-facing cameras of the electronic device 200 for taking selfies, but the present disclosure is not limited thereto. Further, each of the image capturing units 100a, 100b, 100c, 100d, and 100e may include the optical lens assembly for the photography of the present disclosure and have a similar configuration to the image capturing unit 100. Specifically, each of the image capturing units 100a, 100b, 100c, 100d, and 100e may include a lens unit, a driving device, an image sensor, and an image stabilizer, and may also include a reflecting element for deflecting the optical path.In addition, each of the lens units of the image capturing units 100a, 100b, 100c, 100d, and 100e may include the optical lens assembly for photographing of the present disclosure, a tube, and a holding element for holding the optical lens assembly for photographing.

[0214] The image capturing unit 100 is a tele-image capturing unit with a beam path deflection function, the image capturing unit 100a is a wide-angle image capturing unit, the image capturing unit 100b is an ultra-wide-angle image capturing unit, the image capturing unit 100c is a wide-angle image capturing unit, the image capturing unit 100d is an ultra-wide-angle image capturing unit, and the image capturing unit 100e is a runtime image capturing unit. In this embodiment, the image capturing units 100, 100a, and 100b have different fields of view, so that the electronic device 200 can have different magnification ratios to meet the requirement of the optical zoom functionality. In addition, the image capturing unit 100e can determine depth information of the imaged object.In addition, a maximum viewing angle of the image capturing unit 100 and a maximum viewing angle of the image capturing unit 100a can deviate from each other by more than 30 degrees, and the maximum viewing angle of the image capturing unit 100 and a maximum viewing angle of the image capturing unit 100b can deviate from each other by more than 30 degrees. In this embodiment, the electronic device 200 includes multiple image capturing units 100, 100a, 100b, 100c, 100d, and 100e, but the present disclosure is not limited to the number and arrangement of the image capturing units.

[0215] When a user captures images of an object 206, the light rays are bundled in the image capturing unit 100, the image capturing unit 100a, or the image capturing unit 100b to generate images, and the flash module 201 is activated for light support. The focusing assistance module 202 detects the object distance of the imaged object 206 to achieve fast autofocus. The image signal processor 203 is configured to optimize the captured image to improve the image quality. The light ray emitted by the focusing assistance module 202 can be either conventional infrared light or laser light. Additionally, the light rays can be bundled in the image capturing units 100c, 100d, or 100e to generate images.The display module 204 may include a touchscreen, and the user can interact with the display module 204 and the image software processor 205, which has multiple functions for capturing images and performing image processing. Alternatively, the user can capture images via a physical button. The image processed by the image software processor 205 can be displayed on the display module 204. 13. Embodiment

[0216] Fig. 35 is a schematic view of an electronic device according to the thirteenth embodiment of the present disclosure, and Fig. 36 is a further schematic view of the electronic device in Fig. 35.

[0217] In this embodiment, an electronic device 300 is a smartphone that includes the image capturing unit 100, as disclosed in the eleventh embodiment, an image capturing unit 100f, an image capturing unit 100g, an image capturing unit 100h, and a display module 304. As shown in Fig. 35, the image capturing unit 100, the image capturing unit 100f, and the image capturing unit 100g are arranged on the same side of the electronic device 300, and each of the image capturing units 100, 100f, and 100g has a single focal point. As shown in Fig.As shown in FIG. 36, the image capturing unit 100h and the display module 304 are arranged on the opposite side of the electronic device 300, whereby the image capturing unit 100h can serve as a forward-facing camera of the electronic device 300 for taking selfies, but the present disclosure is not limited thereto. Further, each of the image capturing units 100f, 100g, and 100h may include the optical lens assembly for the photography of the present disclosure and have a similar configuration to the image capturing unit 100. Specifically, each of the image capturing units 100f, 100g, and 100h may include a lens unit, a driving device, an image sensor, and an image stabilizer.Additionally, each of the lens units of the image capturing units 100f, 100g, and 100h may include the optical lens assembly for photography of the present disclosure, a tube, and a holding element for holding the optical lens assembly for photography.

[0218] The image capturing unit 100 is a tele-image capturing unit, the image capturing unit 100f is a wide-angle image capturing unit, the image capturing unit 100g is an ultra-wide-angle image capturing unit, and the image capturing unit 100h is a wide-angle image capturing unit. In this embodiment, the image capturing units 100, 100f, and 100g have different viewing fields, so that the electronic device 300 can have different magnification ratios to meet the requirement of the optical zoom functionality. In addition, the maximum viewing field of the image capturing unit 100 and the maximum viewing field of the image capturing unit 100f can differ by more than 30 degrees, and the maximum viewing field of the image capturing unit 100 and the maximum viewing field of the image capturing unit 100g can differ by more than 30 degrees. In addition, the image capturing unit 100h, as in Fig.As shown in Fig. 36, it has a non-circular opening, and the tube or the optical elements in the imaging unit 100h may have cut edges at their outermost positions to match the shape of the non-circular opening. Therefore, the length of each axis of the imaging unit 100h can be further reduced, which is advantageous for reducing the size of the imaging unit 100h, so as to increase the ratio of the area of the display module 304 to that of the electronic device 300 and reduce the thickness of the electronic device 300, thereby achieving compactness. In this embodiment, the electronic device 300 includes multiple imaging units 100, 100f, 100g, and 100h, but the present disclosure is not limited to the number and arrangement of the imaging units. 14. Embodiment

[0219] Fig.37 is a perspective view of an electronic device according to the fourteenth embodiment of the present disclosure.

[0220] In this embodiment, an electronic device 400 is a smartphone that includes the image capturing unit 100 according to the eleventh embodiment, an image capturing unit 100i, an image capturing unit 100j, an image capturing unit 100k, an image capturing unit 100m, an image capturing unit 100n, an image capturing unit 100p, an image capturing unit 100q, an image capturing unit 100r, a flash module 401, a focusing assist module, an image signal processor, a display module, and an image software processor (not shown). The image capturing units 100, 100i, 100j, 100k, 100m, 100n, 100p, 100q, and 100r 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 capturing units 100i, 100j, 100k, 100m, 100n, 100p, 100q, and 100r may include the optical lens assembly for photography of the present disclosure and have a similar configuration as the image capturing unit 100, and the details in this regard will not be described again.

[0221] The image acquisition unit 100 is a tele-image acquisition unit with a beam path deflection function, the image acquisition unit 100i is a wide-angle image acquisition unit, the image acquisition unit 100j is a tele-image acquisition unit with a beam path deflection function, the image acquisition unit 100k is a wide-angle image acquisition unit, the image acquisition unit 100m is an ultra-wide-angle image acquisition unit, the image acquisition unit 100n is an ultra-wide-angle image acquisition unit, the image acquisition unit 100p is a tele-image acquisition unit, the image acquisition unit 100q is a tele-image acquisition unit and the image acquisition unit 100r is a runtime image acquisition unit.In this embodiment, the image capturing units 100, 100i, 100j, 100k, 100m, 100n, 100p and 100q have different viewing angles, so that the electronic device 400 can have different magnification ratios to meet the requirement of the optical zoom functionality. In addition, the image capturing unit 100r can determine depth information of the imaged object. In addition, a maximum viewing angle of the image capturing unit 100 and a maximum viewing angle of the image capturing unit 100i can deviate from each other by more than 30 degrees, and the maximum viewing angle of the image capturing unit 100 and a maximum viewing angle of the image capturing unit 100m can deviate from each other by more than 30 degrees.In this embodiment, the electronic device 400 includes multiple image capturing units 100, 100i, 100j, 100k, 100m, 100n, 100p, 100q, and 100r, but the present disclosure is not limited to the number and arrangement of the image capturing units. When a user captures images of an object, the light rays in the image capturing unit 100, 100i, 100j, 100k, 100m, 100n, 100p, 100q, or 100r are bundled to generate images, and the flash module 401 is activated for light support. Further, the subsequent processes are performed in a similar manner as in the above-mentioned embodiments, and the details thereof are not specified again.

[0222] The smartphones in the embodiments are only used as examples to show the image capturing unit of the present disclosure in an electronic device, and the present disclosure is not limited thereto. The image capturing unit can optionally be applied to optical systems with a movable focus. Further, the optical lens assembly for photographing the image capturing unit has good aberration correction ability and high image quality, and can be used in 3D image capture applications (three-dimensional image capture applications) in products such as digital cameras, mobile devices, digital tablets, smart TVs, network monitoring devices, dashboard cameras, vehicle rearview cameras, multi-camera devices, image recognition systems, motion sensor input devices, unmanned aerial vehicles, portable devices, portable video recorders, and other electronic imaging devices.

[0223] The foregoing description has been presented for purposes of illustration and description in connection with specific embodiments. It should be noted that TABLES 1A-10C show different data of the various embodiments; however, the data of the various embodiments were obtained from experiments. The embodiments have been chosen and described in order to best explain the principles of the disclosure and their practical applications, so that others skilled in the art can best utilize the disclosure and various embodiments with various modifications that are suitable for the respective intended use. The embodiments shown above and the accompanying drawings are exemplary and are not intended to be exhaustive or to limit the scope of the present disclosure to the precisely disclosed forms. In view of the above teachings, many modifications and variations are possible.

Claims

[1] Optical lens assembly for photography, comprising six optical elements (E1, E2, E3, E4, E5 and E6), wherein the six optical elements (E1, E2, E3, E4, E5 and E6) are, in order from an object side to an image side along an optical path, a first optical element (E1), a second optical element (E2), a third optical element (E3), a fourth optical element (E4), a fifth optical element (E5) and a sixth optical element (E6), and each of the six optical elements (E1, E2, E3, E4, E5 and E6) has an object-side surface facing towards the object side and an image-side surface facing towards the image side; where the first optical element (E1) has a positive refractive power, the object-side surface of the first optical element (E1) is convex in a paraxial region thereof, the fourth optical element (E4) has a positive refractive power and the object-side surface of the fourth optical element (E4) is convex in a paraxial region thereof; where a central thickness of the first optical element (E1) is CT1, a central thickness of the second optical element (E2) is CT2, a central thickness of the third optical element (E3) is CT3, a central thickness of the fourth optical element (E4) is CT4, a central thickness of the fifth optical element (E5) is CT5, a central thickness of the sixth optical element (E6) is CT6, a focal length of the optical lens assembly for photography is f, a focal length of the first optical element (E1) is f1, a curvature radius of the object-side surface of the second optical element (E2) is R3, a curvature radius of the image-side surface of the sixth optical element (E6) is R12, and the following conditions are satisfied: 0.45 < (CT2 + CT3 + CT4 + CT5 + CT6) / CT1 < 1.55; 0.00 < f / f1 < 1.00; and −10.00 < (R3 + R12) / (R3 − R12) < −1.

30. [2] The photographic optical lens unit according to claim 1, wherein the object-side surface of the second optical element (E2) is convex in a paraxial region thereof and the image-side surface of the sixth optical element (E6) is concave in a paraxial region thereof; and wherein half of a maximum viewing angle of the photographic optical lens unit is HFOV and the following condition is satisfied: 8.0 degrees < HFOV < 20.0 degrees. [3] The photographic optical lens unit according to claim 1, wherein a sum of axial distances between each of adjacent optical elements of the photographic optical lens unit is ΣAT, an axial distance between the image-side surface of the sixth optical element (E6) and an image surface (IMG) BL is, a sum of central thicknesses of all optical elements of the photographic optical lens unit is ΣCT and the following condition is satisfied: 0.40 < (∑AT + BL) / ∑CT < 1.

60. [4] The photographic optical lens unit according to claim 1, further comprising an aperture stop (ST), wherein the focal length of the photographic optical lens unit is f, the combined focal length of the second optical element (E2) and the third optical element (E3) is f23, the entrance pupil diameter of the photographic optical lens unit, which corresponds to the maximum direction of the entrance pupil diameter of the aperture stop (ST), is EPDmax, and the following conditions are satisfied: 1.60 < f / EPDmax < 3.60; and -2.20 < f / f23 < 0.

60. [5] The photographic optical lens unit according to claim 1, wherein the focal length of the photographic optical lens unit is f, the focal length of the fourth optical element (E4) is f4, and the following condition is satisfied: 0.03 < f4 / f < 1.

80. [6] The optical lens assembly for photography according to claim 1, wherein a curvature radius of the image-side surface of the first optical element (E1) is R2, a curvature radius of the object-side surface of the second optical element (E2) is R3, and the following condition is satisfied: 0.00 ≤ |R3 / R2| < 0.

30. [7] The optical lens assembly for photography according to claim 1, wherein a curvature radius of the object-side surface of the first optical element (E1) is R1, a curvature radius of the object-side surface of the fourth optical element (E4) is R7, and the following condition is satisfied: 0.00 ≤ |R7 / R1| < 1.

00. [8] The optical lens assembly for photography according to claim 1, wherein a curvature radius of the object-side surface of the fourth optical element (E4) is R7, a curvature radius of the object-side surface of the fifth optical element (E5) is R9, and the following condition is satisfied: −2.00 < (R7 + R9) / (R7 − R9) < 0.

30. [9] The optical lens assembly for photography according to claim 1, wherein an Abbe number of the fifth optical element (E5) is V5, an Abbe number of the sixth optical element (E6) is V6, a refractive index of the fourth optical element (E4) is N4, and the following conditions are satisfied: 0.90 < V5 / V6 < 5.00; and 1.450 < N4 < 1.

580. [10] The optical lens assembly for photography according to claim 1, wherein the first optical element (E1) is a prism and the first optical element (E1) has a reflective surface (P1); and where a refractive index of the first optical element (E1) is N1, the central thickness of the first optical element (E1) is CT1, the central thickness of the second optical element (E2) is CT2, the central thickness of the third optical element (E3) is CT3, the central thickness of the fourth optical element (E4) is CT4, the central thickness of the fifth optical element (E5) is CT5, the central thickness of the sixth optical element (E6) is CT6, and the following conditions are satisfied: 1,500 < N1 < 1,600; and 0.55 < (CT2 + CT3 + CT4 + CT5 + CT6) / CT1 < 1.

45. [11] The optical lens assembly for photography according to claim 1, wherein a displacement parallel to an optical axis from an axial vertex point of the object-side surface of the first optical element (E1) to a position of the maximum effective radius of the object-side surface of the first optical element (E1) is SAG1R1, a displacement parallel to the optical axis from an axial vertex point of the image-side surface of the first optical element (E1) to a position of the maximum effective radius of the image-side surface of the first optical element (E1) is SAG1R2, a distance parallel to the optical axis between the position of the maximum effective radius of the object-side surface of the first optical element (E1) and the position of the maximum effective radius of the image-side surface of the first optical element (E1) is ET1, and the following condition is satisfied: −0.10 < (SAG1R1 + SAG1R2) / ET1 < 0.

35. [12] Image acquisition unit (1, 100), comprising: the optical lens assembly for photography according to claim 1; and an image sensor (IS, 103) arranged on an image surface (IMG) of the optical lens assembly for photography. [13] Electronic device (200), comprising at least two image acquisition units, wherein the at least two image acquisition units are arranged on the same side of the electronic device (200), and the at least two image acquisition units comprise: a first image acquisition unit (1, 100) that comprises the image acquisition unit (1, 100) according to claim 12; and a second image acquisition unit (100a) that comprises an optical lens assembly and an image sensor arranged on an image surface of the optical lens assembly; where a maximum viewing angle of the first image acquisition unit (1, 100) and a maximum viewing angle of the second image acquisition unit (100a) deviate from each other by more than 30 degrees. [14] Optical lens assembly for photography, comprising six optical elements (E1, E2, E3, E4, E5 and E6), wherein the six optical elements (E1, E2, E3, E4, E5 and E6) in the order from an object side to an image side along an optical path are a first optical element (E1), a second optical element (E2), a third optical element (E3), a fourth optical element (E4), a fifth optical element (E5) and a sixth optical element (E6), and each of the six optical elements (E1, E2, E3, E4, E5 and E6) has an object-side surface facing the object side and an image-side surface facing the image side; where the first optical element (E1) has a positive refractive power, the object-side surface of the first optical element (E1) is convex in a paraxial region thereof, the fourth optical element (E4) has a positive refractive power, and the object-side surface of the fourth optical element (E4) is convex in a paraxial region thereof; where a central thickness of the first optical element (E1) is CT1, a central thickness of the second optical element (E2) is CT2, a central thickness of the third optical element (E3) is CT3, a central thickness of the fourth optical element (E4) is CT4, a central thickness of the fifth optical element (E5) is CT5, a central thickness of the sixth optical element (E6) is CT6, a focal length of the optical lens assembly for photography is f, a focal length of the first optical element (E1) is f1, a combined focal length of the fifth optical element (E5) and the sixth optical element (E6) is f56, a curvature radius of the image-side surface of the first optical element (E1) is R2, a curvature radius of the object-side surface of the fourth optical element (E4) is R7, and the following conditions are satisfied: 0.40 < (CT2 + CT3 + CT4 + CT5 + CT6) / CT1 < 1.60; 0.00 < f / f1 < 0.90; −3.00 < f / f56 < −0.65; and 0.00 ≤ |R7 / R2| < 0.

80. [15] The optical lens assembly for photography according to claim 14, wherein the object-side surface of the second optical element (E2) is convex in a paraxial region thereof and the image-side surface of the sixth optical element (E6) is concave in a paraxial region thereof. [16] The optical lens assembly for photography according to claim 14, wherein the radius of curvature of the image-side surface of the first optical element (E1) is R2, the radius of curvature of the object-side surface of the fourth optical element (E4) is R7, the radius of curvature of the object-side surface of the fifth optical element (E5) is R9, and the following condition is satisfied: 0.01 < (|R7| + |R9|) / |R2| < 2.

00. [17] Optical lens assembly for photography according to claim 14, wherein the radius of curvature of the object-side surface of the fourth optical element (E4) is R7, the radius of curvature of the image-side surface of the sixth optical element (E6) is R12, the maximum effective radius of the object-side surface of the first optical element (E1) is Y1R1, the maximum image height of the optical lens assembly for photography is ImgH, and the following conditions are satisfied: 1.60 < R12 / R7 < 8.00; and 0.80 < Y1R1 / lmgH < 1.

60. [18] Optical lens assembly for photography according to claim 14, wherein the central thickness of the first optical element (E1) is CT1, the central thickness of the third optical element (E3) is CT3, and the following condition is satisfied: 0.10 < 10×CT3 / CT1 < 3.

00. [19] The optical lens assembly for photography according to claim 14, further comprising an aperture stop (ST), wherein the central thickness of the third optical element (E3) is CT3, the focal length of the optical lens assembly for photography is f, an entrance pupil diameter of the optical lens assembly for photography, which corresponds to a maximum direction of the entrance pupil diameter of the aperture stop (ST), is EPDmax, and the following conditions are satisfied: 0.15 < 10×CT3 / f < 0.60; and 1.80 < f / EPDmax < 3.

30. [20] The optical lens assembly for photography according to claim 14, wherein a refractive index of the second optical element (E2) is N2, a curvature radius of the image-side surface of the first optical element (E1) is R2, a curvature radius of the object-side surface of the fourth optical element (E4) is R7 and the following conditions are satisfied: 1.420 < N2 < 1.620; and 0.01 < |R7 / R2| < 0.

40. [21] Optical lens assembly for photography according to claim 14, wherein the focal length of the optical lens assembly for photography is f, the focal length of the fourth optical element (E4) is f4, and the following condition is satisfied: 0.06 < f4 / f < 1.

10. [22] Optical lens assembly for photography according to claim 14, wherein at least one of the six optical elements (E1, E2, E3, E4, E5, and E6) has at least one inflection point (P); and wherein the sum of the axial distances between each of the adjacent optical elements of the optical lens assembly for photography is ΣAT, the axial distance between the image-side surface of the sixth optical element (E6) and an image surface (IMG) BL is, the sum of the central thicknesses of all optical elements of the optical lens assembly for photography is ΣCT, and the following condition is satisfied: 0.50 < (∑AT + BL) / ∑CT < 1.

40. [23] The photographic optical lens unit according to claim 14, wherein the focal length of the photographic optical lens unit is f, the focal length of the fifth optical element (E5) is f5, the focal length of the sixth optical element (E6) is f6, and the following condition is satisfied: −2.50 < f / f5 + f / f6 < −0.

80. [24] The photographic optical lens unit according to claim 14, wherein the radius of curvature of the image-side surface of the fifth optical element (E5) is R10, the focal length of the sixth optical element (E6) is f6, and the following condition is satisfied: −0.25 < R10 / f6 < 10.

00. [25] The photographic optical lens unit according to claim 14, wherein the axial distance between the second optical element (E2) and the third optical element (E3) is T23, the central thickness of the second optical element (E2) is CT2, and the following condition is satisfied: 0.10 < T23 / CT2 < 0.

80. [26] Optical lens assembly for photography according to claim 14, wherein the first optical element (E1) has a reflective surface (P1); and where an axial distance between the reflecting surface (P1) of the first optical element (E1) and an image surface (IMG) P1TL, an axial distance between the object-side surface of the first optical element (E1) and the image surface (IMG) TL, a shift parallel to an optical axis from an axial vertex of the object-side surface of the fifth optical element (E5) to a position of a maximum effective radius of the object-side surface of the fifth optical element (E5) is SAG5R1, a shift parallel to the optical axis from an axial vertex of the image-side surface of the fifth optical element (E5) to a position of a maximum effective radius of the image-side surface of the fifth optical element (E5) is SAG5R2, a central thickness of the fifth optical element (E5) is CT5 and the following conditions are satisfied: 0.70 < P1TL / TL < 0.95; and −1.10 < (SAG5R1 + SAG5R2) / CT5 < 0.

80. [27] Optical lens assembly for photography according to claim 14, wherein a displacement parallel to an optical axis from an axial vertex point of the image-side surface of the sixth optical element (E6) to a position of the maximum effective radius of the image-side surface of the sixth optical element (E6) is SAG6R2, the central thickness of the sixth optical element (E6) is CT6, and the following condition is satisfied: −0.50 < SAG6R2 / CT6 < 0.

80. [28] Optical lens assembly for photography according to claim 14, wherein the central thickness of the first optical element (E1) is CT1, the central thickness of the second optical element (E2) is CT2, the central thickness of the third optical element (E3) is CT3, the central thickness of the fourth optical element (E4) is CT4, the central thickness of the fifth optical element (E5) is CT5, the central thickness of the sixth optical element (E6) is CT6, the focal length of the optical lens assembly for photography is f, the focal length of the first optical element (E1) is f1, the combined focal length of the fifth optical element (E5) and the sixth optical element (E6) is f56, the curvature radius of the image-side surface of the first optical element (E1) is R2, a curvature radius of the object-side surface of the second optical element (E2) is R3, the curvature radius of the object-side surface of the fourth optical element (E4) is R7,The curvature radius of the image-side surface of the sixth optical element (E6) is R12, and the following conditions are satisfied: 0.78 ≤ (CT2 + CT3 + CT4 + CT5 + CT6) / CT1 ≤ 1.23; 0.33 ≤ f / f1 ≤ 0.64; −2.06 ≤ f / f56 ≤ -1.09; −5.94 ≤ (R3 + R12) / (R3 − R12) ≤ −1.

63. and 0.02 ≤ |R7 / R2| ≤ 0.18.

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