Photographing optical lens assembly, image capturing unit and electronic device

Abstract

A photographic optical lens assembly includes six optical elements. The six optical elements are sequentially arranged from the object side to the image side along the 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. The first optical element has positive refractive power. The object-side surface of the first optical element is convex near the optical axis. The fourth optical element also has positive refractive power. Its object-side surface is convex near the optical axis. Under certain conditions, the photographic optical lens assembly can simultaneously meet the requirements of telescopic function, miniaturization, and high image quality.

Description

Technical Field

[0001] This disclosure relates to a photographic optical lens assembly, an image capturing device, and an electronic device, particularly a photographic optical lens assembly and an image capturing device suitable for electronic devices. Prior Technology

[0002] With advancements in semiconductor manufacturing technology, the performance of electronic image sensors has improved, allowing pixels to reach smaller sizes. As a result, optical lenses with high image quality have become an indispensable component.

[0003] With the rapid advancement of technology, electronic devices equipped with optical lenses are being used in a wider range of applications, leading to more diverse requirements for these lenses. Because traditional optical lenses have struggled to achieve a balance between image quality, sensitivity, aperture size, size, and viewing angle, this invention provides an optical lens that meets these needs. Summary of the Invention

[0004] This disclosure provides a photographic optical lens assembly, an image capturing device, and an electronic device. The photographic optical lens assembly includes six optical elements. These six optical elements are arranged sequentially from the object side to the image side along the light path. Under certain conditions, the photographic optical lens assembly provided by this disclosure can simultaneously meet the requirements of telescopic function, miniaturization, and high image quality.

[0005] This disclosure provides a photographic optical lens assembly comprising six optical elements. The six optical elements are sequentially arranged from the object side to the image side along the optical path as 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. Preferably, the first optical element has positive refractive power. Preferably, the object-side surface of the first optical element is convex near the optical axis. Preferably, the fourth optical element has positive refractive power. Preferably, the object-side surface of the fourth optical element is convex near the optical axis. Wherein, the thickness of the first optical element along the optical axis is CT1, the thickness of the second optical element along the optical axis is CT2, the thickness of the third optical element along the optical axis is CT3, the thickness of the fourth optical element along the optical axis is CT4, the thickness of the fifth optical element along the optical axis is CT5, and the thickness of the sixth optical element along the optical axis is CT6. The focal length of the photographic optical lens group is f, the focal length of the first optical element is f1, the radius of curvature of the object-side surface of the second optical element is R3, and the radius of curvature of the image-side surface of the sixth optical element is R12. Preferably, it satisfies the following conditions:

[0006] 0.45 < (CT2+CT3+CT4+CT5+CT6) / CT1 < 1.55;

[0007] 0.00 < f / f1 < 1.00; and

[0008] -10.00 < (R3+R12) / (R3-R12) < -1.30.

[0009] This disclosure also provides a photographic optical lens assembly comprising six optical elements. The six optical elements are sequentially arranged from the object side to the image side along the optical path as 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. Preferably, the first optical element has positive refractive power. Preferably, the object-side surface of the first optical element is convex near the optical axis. Preferably, the fourth optical element has positive refractive power. Preferably, the object-side surface of the fourth optical element is convex near the optical axis. Wherein, the thickness of the first optical element along the optical axis is CT1, the thickness of the second optical element along the optical axis is CT2, the thickness of the third optical element along the optical axis is CT3, the thickness of the fourth optical element along the optical axis is CT4, the thickness of the fifth optical element along the optical axis is CT5, and the thickness of the sixth optical element along the optical axis is CT6. The focal length of the photographic optical lens group is f, the focal length of the first optical element is f1, the combined focal length of the fifth and sixth optical elements is f56, 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 fourth optical element is R7. Preferably, it satisfies the following conditions:

[0010] 0.40 < (CT2+CT3+CT4+CT5+CT6) / CT1 < 1.60;

[0011] 0.00 < f / f1 < 0.90;

[0012] -3.00 < f / f56 < -0.65; and

[0013] 0.00 ≤ |R7 / R2| < 0.80.

[0014] This disclosure provides an image capturing device, which includes the aforementioned photographic optical lens assembly and an electronic photosensitive element, wherein the electronic photosensitive element is disposed on the imaging surface of the photographic optical lens assembly.

[0015] This disclosure provides an electronic device comprising at least two image-capturing devices, both located on the same side of the electronic device, and comprising a first image-capturing device and a second image-capturing device. The first image-capturing device comprises the aforementioned photographic optical lens assembly and an electronic photosensitive element, wherein the electronic photosensitive element of the first image-capturing device is disposed on the imaging surface of the photographic optical lens assembly. The second image-capturing device comprises an optical lens assembly and an electronic photosensitive element, wherein the electronic photosensitive element of the second image-capturing device is disposed on the imaging surface of the optical lens assembly. Preferably, the maximum viewing angle in the first image-capturing device differs from the maximum viewing angle in the second image-capturing device by more than 30 degrees.

[0016] When (CT2+CT3+CT4+CT5+CT6) / CT1 satisfies the above conditions, it helps to control the center thickness of the first optical element, enabling the first optical element to have the function of turning the optical path while taking into account the process limitations of the first optical element.

[0017] When f / f1 meets the above conditions, the light convergence at the object side of the photographic optical lens group can be controlled, which helps in the formation of the telescope structure.

[0018] When (R3+R12) / (R3-R12) satisfies the above conditions, 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 can be effectively balanced, which helps to improve the focusing quality of the imaging light and effectively improve the image curvature and reduce spherical aberration.

[0019] When f / f56 meets the above conditions, it helps to adjust the convergence or divergence of light at the image side of the photographic optical lens group, which is beneficial for correcting distortion and image curvature.

[0020] When |R7 / R2| meets the above conditions, the deflection angle of the light in the first optical element and the fourth optical element can be effectively controlled to balance the central spherical aberration. Simple Explanation of the Diagram

[0021] Figure 1 illustrates a cross-sectional view of the imaging device according to the first embodiment of this disclosure, corresponding to the effective sensing area of ​​the electronic photosensitive element along the diagonal direction. Figure 2 illustrates a cross-sectional view of the imaging device according to the first embodiment of this disclosure, showing the optical path being turned by a first optical element and corresponding to the short side direction of the effective sensing area of ​​the electronic photosensitive element. Figure 3 shows the spherical aberration, astigmatism, and distortion curves of the first embodiment from left to right. Figure 4 illustrates a cross-sectional view of the imaging device according to the second embodiment of this disclosure, corresponding to the effective sensing area of ​​the electronic photosensitive element along the diagonal direction. Figure 5 illustrates a cross-sectional view of the imaging device according to the second embodiment of this disclosure, showing the optical path being turned by the first optical element and corresponding to the short side direction of the effective sensing area of ​​the electronic photosensitive element. Figure 6 shows the spherical aberration, astigmatism, and distortion curves of the second embodiment from left to right. Figure 7 illustrates a cross-sectional view of the imaging device according to the third embodiment of this disclosure, corresponding to the effective sensing area of ​​the electronic photosensitive element along the diagonal direction. Figure 8 illustrates a cross-sectional view of the imaging device according to the third embodiment of this disclosure, showing the optical path being turned by the first optical element and corresponding to the short side direction of the effective sensing area of ​​the electronic photosensitive element. Figure 9 shows the spherical aberration, astigmatism, and distortion curves of the third embodiment from left to right. Figure 10 illustrates a cross-sectional view of the imaging device according to the fourth embodiment of this disclosure, corresponding to the effective sensing area of ​​the electronic photosensitive element along the diagonal direction. Figure 11 illustrates a cross-sectional view of the imaging device according to the fourth embodiment of this disclosure, showing the optical path being turned by a first optical element and corresponding to the short side direction of the effective sensing area of ​​the electronic photosensitive element. Figure 12 shows the spherical aberration, astigmatism, and distortion curves of the fourth embodiment from left to right. Figure 13 illustrates a cross-sectional view of the imaging device according to the fifth embodiment of this disclosure, corresponding to the effective sensing area of ​​the electronic photosensitive element along the diagonal direction. Figure 14 illustrates a cross-sectional view of the imaging device according to the fifth embodiment of this disclosure, showing the optical path being turned by a first optical element and corresponding to the short side direction of the effective sensing area of ​​the electronic photosensitive element. Figure 15 shows the spherical aberration, astigmatism, and distortion curves of the fifth embodiment from left to right. Figure 16 illustrates a cross-sectional view of the imaging device according to the sixth embodiment of this disclosure, corresponding to the effective sensing area of ​​the electronic photosensitive element along the diagonal direction. Figure 17 illustrates a cross-sectional view of the imaging device according to the sixth embodiment of this disclosure, showing the optical path being turned by a first optical element and corresponding to the short side direction of the effective sensing area of ​​the electronic photosensitive element. Figure 18 shows the spherical aberration, astigmatism, and distortion curves of the sixth embodiment from left to right. Figure 19 illustrates a cross-sectional view of the imaging device according to the seventh embodiment of this disclosure, corresponding to the effective sensing area of ​​the electronic photosensitive element along the diagonal direction. Figure 20 illustrates a cross-sectional view of the imaging device according to the seventh embodiment of this disclosure, showing the optical path being turned by a first optical element and corresponding to the short side direction of the effective sensing area of ​​the electronic photosensitive element. Figure 21 shows the spherical aberration, astigmatism, and distortion curves of the seventh embodiment from left to right. Figure 22 illustrates a cross-sectional view of the imaging device according to the eighth embodiment of this disclosure, corresponding to the effective sensing area of ​​the electronic photosensitive element along the diagonal direction. Figure 23 illustrates a cross-sectional view of the imaging device according to the eighth embodiment of this disclosure, showing the optical path being turned by a first optical element and corresponding to the short side direction of the effective sensing area of ​​the electronic photosensitive element. Figure 24 shows the spherical aberration, astigmatism, and distortion curves of the eighth embodiment from left to right. Figure 25 illustrates a cross-sectional view of the imaging device according to the ninth embodiment of this disclosure, corresponding to the effective sensing area of ​​the electronic photosensitive element along the diagonal direction. Figure 26 illustrates a cross-sectional view of the imaging device according to the ninth embodiment of this disclosure, showing the optical path being turned by a first optical element and corresponding to the short side direction of the effective sensing area of ​​the electronic photosensitive element. Figure 27 shows the spherical aberration, astigmatism, and distortion curves of the ninth embodiment from left to right. Figure 28 illustrates a cross-sectional view of an imaging device according to the tenth embodiment of this disclosure, corresponding to the effective sensing area of ​​an electronic photosensitive element along the diagonal direction. Figure 29 illustrates a cross-sectional view of the imaging device according to the tenth embodiment of this disclosure, showing the optical path being turned by a first optical element and corresponding to the short side direction of the effective sensing area of ​​the electronic photosensitive element. Figure 30 shows the spherical aberration, astigmatism, and distortion curves of the tenth embodiment from left to right. Figure 31 illustrates a perspective view of an imaging device according to the eleventh embodiment of this disclosure. Figure 32 illustrates a perspective view of one side of an electronic device according to the twelfth embodiment of this disclosure. Figure 33 shows a three-dimensional schematic diagram of the other side of the electronic device in Figure 32. Figure 34 shows a system block diagram of the electronic device in Figure 32. Figure 35 illustrates a schematic diagram of one side of an electronic device according to the thirteenth embodiment of this disclosure. Figure 36 shows a schematic diagram of the other side of the electronic device in Figure 35. Figure 37 illustrates a perspective view of one side of an electronic device according to the fourteenth embodiment of this disclosure. Figure 38 illustrates a schematic diagram of the inflection point on the surface of the optical element according to the first embodiment of this disclosure. Figure 39 illustrates a schematic diagram of parameters Y1R1, ET1, SAG1R1, SAG1R2, SAG5R1, SAG5R2, SAG6R2 and ImgH in the first embodiment according to this disclosure. Figure 40 illustrates a schematic diagram of parameter P1TL according to the first embodiment of this disclosure. Figure 41 is a schematic diagram illustrating the shape configuration of the aperture of a photographic optical lens assembly in an embodiment according to this disclosure. Figure 42 illustrates a schematic diagram of the aperture configuration of a photographic optical lens assembly according to another embodiment of this disclosure. Figure 43 illustrates a schematic diagram of the entrance pupil diameter of a photographic optical lens assembly according to an embodiment of the present disclosure, corresponding to the major axis direction, minor axis direction, and maximum entrance pupil diameter direction of the aperture in Figure 42. Figure 44 illustrates a schematic diagram of the structure of a single optical element of a photographic optical lens assembly after being chamfered, according to an embodiment of this disclosure. Figure 45 illustrates a structural schematic diagram of a single optical element of a photographic optical lens assembly after being chamfered, according to another embodiment of this disclosure. Implementation

[0022] The photographic optical lens assembly comprises six optical elements, which are sequentially arranged from the object side to the image side along the optical path as the first optical element, the second optical element, the third optical element, the fourth optical element, the fifth optical element, and the 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.

[0023] The first optical element may have positive refractive power; thereby, it helps to reduce the size of the photographic optical lens assembly and control the shooting angle. The object-side surface of the first optical element may be convex near the optical axis; thereby, it helps to reduce the outer diameter of the photographic optical lens assembly. The first optical element may be, for example, a prism or a lens.

[0024] The object-side surface of the second optical element can be convex near the optical axis. This allows it to work in conjunction with the first optical element to correct aberrations such as spherical aberration.

[0025] The fourth optical element can have positive refractive power; this balances the refractive power of the front and rear optical elements and helps to converge light, achieving a balance between image quality and overall length. The object-side surface of the fourth optical element can be convex near the optical axis; this enhances the ability of the fourth optical element to converge light, helping to shorten the overall length of the photographic optical lens assembly.

[0026] The image-side surface of the sixth optical element can be concave near the optical axis. This helps to balance the back focal length and correct field curvature, thereby improving image quality.

[0027] The first optical element can function as a light path deflector. This allows for different light path orientations in the photographic lens assembly, giving the lens more flexibility in its use and enabling telephoto capabilities at long focal lengths. For example, the first optical element can be a prism.

[0028] Of the six optical elements in a photographic optical lens assembly, at least one optical element may have at least one inversion point. Specifically, one or more of the first to sixth optical elements may have at least one inversion point. The statement that a single optical element has at least one inversion point means that at least one of its object-side surface and image-side surface has at least one inversion point. This helps increase design freedom and reduce aberrations. Referring to Figure 38, a schematic diagram of inversion points P on the surfaces of optical elements according to the first embodiment of this disclosure is shown. In Figure 38, the image-side surfaces of the first optical element E1, the second optical element E2, the fourth optical element E4, the fifth optical element E5, and the sixth optical element E6 each have one inversion point P, and the image-side surface of the sixth optical element E6 has two inversion points P. Figure 38 illustrates the first embodiment of this disclosure as an example; however, in other embodiments of this disclosure, each optical element may have one or more inversion points.

[0029] The thickness of the first optical element along the optical axis is CT1, the thickness of the second optical element along the optical axis is CT2, the thickness of the third optical element along the optical axis is CT3, the thickness of the fourth optical element along the optical axis is CT4, the thickness of the fifth optical element along the optical axis is CT5, and the thickness of the sixth optical element along the optical axis is CT6. This satisfies the following condition: 0.40 < (CT2+CT3+CT4+CT5+CT6) / CT1 < 1.60. This helps control the center thickness of the first optical element, enabling it to function as a light-path deflector while also meeting the manufacturing limitations of the first optical element. The following condition can also be satisfied: 0.45 < (CT2+CT3+CT4+CT5+CT6) / CT1 < 1.55. The following condition can also be satisfied: 0.55 < (CT2+CT3+CT4+CT5+CT6) / CT1 < 1.45. The following condition can also be met: 0.78 ≤ (CT2+CT3+CT4+CT5+CT6) / CT1 ≤ 1.23.

[0030] The focal length of the photographic optical lens assembly is f, and the focal length of the first optical element is f1, which can satisfy the following condition: 0.00 < f / f1 < 1.00. This allows control over the light convergence at the object-side end of the photographic optical lens assembly, contributing to the formation of the telescope structure. It can also satisfy the following conditions: 0.00 < f / f1 < 0.90. Furthermore, it can also satisfy the following conditions: 0.10 < f / f1 < 0.80. Finally, it can also satisfy the following conditions: 0.33 ≤ f / f1 ≤ 0.64.

[0031] The radius of curvature of the object-side surface of the second optical element is R3, and the radius of curvature of the image-side surface of the sixth optical element is R12. This satisfies the following condition: -10.00 < (R3+R12) / (R3-R12) < -1.30. This effectively balances the radius of curvature of the object-side surface of the second optical element and the radius of curvature of the image-side surface of the sixth optical element, helping to improve the focusing quality of the imaging light and effectively improve image curvature and reduce spherical aberration. It also satisfies the following condition: -9.00 < (R3+R12) / (R3-R12) < -1.40. Furthermore, it satisfies the following condition: -5.94 ≤ (R3+R12) / (R3-R12) ≤ -1.63.

[0032] The focal length of the photographic optical lens group is f, and the combined focal length of the fifth and sixth optical elements is f56, which satisfies the following condition: -3.00 < f / f56 < -0.65. This helps to adjust the convergence or divergence of light at the image side of the photographic optical lens group, thus facilitating the correction of distortion and image curvature. It also satisfies the following condition: -2.60 < f / f56 < -0.80. Furthermore, it satisfies the following condition: -2.06 ≤ f / f56 ≤ -1.09.

[0033] 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 fourth optical element is R7, which can satisfy the following condition: 0.00 ≤ |R7 / R2| < 0.80. This allows for effective control of the deflection angle of light rays between the first and fourth optical elements, thus balancing central spherical aberration. The following conditions can also be satisfied: 0.00 ≤ |R7 / R2| < 0.60. The following conditions can also be satisfied: 0.01 < |R7 / R2| < 0.40. The following conditions can also be satisfied: 0.02 ≤ |R7 / R2| ≤ 0.18.

[0034] Half of the maximum angle of view in a photographic lens assembly is the upper field of view (HFOV), which must satisfy the following conditions: 8.0 degrees < HFOV < 20.0 degrees. This allows the lens to have a suitable angle of view and is beneficial for forming a telephoto structure.

[0035] The sum of the distances between all adjacent optical elements in the photographic lens assembly along the optical axis is ΣAT, the distance from the image-side surface of the sixth optical element to the imaging plane along the optical axis is BL, and the sum of the thicknesses of all optical elements in the photographic lens assembly along the optical axis is ΣCT. This satisfies the following condition: 0.40 < (ΣAT+BL) / ΣCT < 1.60. This helps to balance the spatial configuration and ensures sufficient back focal length in the photographic lens assembly. It also satisfies the following condition: 0.50 < (ΣAT+BL) / ΣCT < 1.40.

[0036] The photographic optical lens assembly disclosed herein may further include an aperture; thereby, the shooting angle of the photographic optical lens assembly can be controlled, and the lens can be ensured to have an appropriate amount of light intake in the telephoto structure. The aperture may have a major axis direction and a minor axis direction perpendicular to the optical axis and different from each other, and the effective radius of the aperture in the major axis direction is different from the effective radius of the aperture in the minor axis direction; thereby, the shape of the aperture can be adjusted, which helps to reduce stray light. For example, referring to Figures 41 and 42, which are schematic diagrams illustrating non-circular apertures of photographic optical lens assemblies according to some embodiments of this disclosure, Figure 41 illustrates a schematic diagram of the shape configuration of the aperture of a photographic optical lens assembly according to one embodiment of this disclosure, and Figure 42 illustrates a schematic diagram of the shape configuration of the aperture of a photographic optical lens assembly according to another embodiment of this disclosure. As shown in Figure 41, in some embodiments disclosed herein, the aperture ST is elliptical in shape, having a major axis LX perpendicular to the optical axis OA and a minor axis SY. The directions of the major axis LX and the minor axis SY are opposite, and the effective radius Ra of the aperture ST along the major axis LX is greater than the effective radius Rb of the aperture ST along the minor axis SY. As shown in Figure 42, in some embodiments disclosed herein, the aperture ST has a tangent at its outer diameter, having a major axis LX perpendicular to the optical axis OA and a minor axis SY. The directions of the major axis LX and the minor axis SY are opposite, and the effective radius Ra of the aperture ST along the major axis LX is greater than the effective radius Rb of the aperture ST along the minor axis SY.

[0037] The focal length of the photographic optical lens group is f, and the entrance pupil diameter of the photographic optical lens group in the direction of the maximum entrance pupil diameter corresponding to the aperture is EPDmax, which can satisfy the following condition: 1.60 < f / EPDmax < 3.60. This achieves a balance between illumination and depth of field, helping to improve the telephoto function of the photographic optical lens group. It can also satisfy the following condition: 1.80 < f / EPDmax < 3.30. Here, f / EPDmax can refer to the aperture value (F-number) of the photographic optical lens group in the direction of the maximum entrance pupil diameter. Please refer to Figure 43, which is a schematic diagram illustrating the parameter EPDmax of an embodiment according to this disclosure. Specifically, Figure 43 illustrates the entrance pupil diameter of the photographic optical lens group in an embodiment according to this disclosure, corresponding to the major axis LX direction, minor axis SY direction, and the direction of the maximum entrance pupil diameter of the aperture ST in Figure 42. As shown in Figure 43, the entrance pupil diameter of the photographic optical lens group in the direction of the major axis LX of the corresponding aperture ST is EPDx, the entrance pupil diameter of the photographic optical lens group in the direction of the minor axis SY of the corresponding aperture ST is EPDy, and the entrance pupil diameter of the photographic optical lens group in the direction of the maximum entrance pupil diameter of the corresponding aperture ST is EPDmax.

[0038] The focal length of the photographic optical lens assembly is f, and the combined focal length of the second and third optical elements is f23, which satisfies the following condition: -2.20 < f / f23 < 0.60. This helps to adjust the convergence or divergence of light at the object-side end of the photographic optical lens assembly, thus facilitating the correction of spherical aberration. It also satisfies the following condition: -1.80 < f / f23 < 0.20.

[0039] The focal length of the photographic optical lens group is f, and the focal length of the fourth optical element is f4, which satisfies the following condition: 0.03 < f4 / f < 1.80. This allows the fourth optical element to possess strong positive refractive power, which is helpful for overall length control and balances the overall refractive power configuration. It also satisfies the following condition: 0.06 < f4 / f < 1.10. Furthermore, it also satisfies the following condition: 0.15 < f4 / f < 0.90.

[0040] 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, which can satisfy the following condition: 0.00 ≤ |R3 / R2| < 0.30. This allows the image-side surface of the first optical element to have a smaller curvature, reducing spherical aberration and improving productivity. It can also satisfy the following condition: 0.00 ≤ |R3 / R2| < 0.25.

[0041] The radius of curvature of the object-side surface of the first optical element is R1, and the radius of curvature of the object-side surface of the fourth optical element is R7, which satisfies the following condition: 0.00 ≤ |R7 / R1| < 1.00. This allows the surface shapes of the object-side surfaces of the first and fourth optical elements to be matched to adjust the optical path, which is beneficial for forming a telephoto configuration. Furthermore, the following condition can also be satisfied: 0.05 < |R7 / R1| < 0.80.

[0042] 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, which satisfies the following condition: -2.00 < (R7+R9) / (R7-R9) < 0.30. This allows the surface shapes of the object-side surfaces of the fourth and fifth optical elements to match, helping to reduce aberrations in different fields of view. Furthermore, it also satisfies the following condition: -1.80 < (R7+R9) / (R7-R9) < 0.00.

[0043] The Abbe number of the fifth optical element is V5, and the Abbe number of the sixth optical element is V6, which satisfies the following condition: 0.90 < V5 / V6 < 5.00. This allows the materials of the fifth and sixth optical elements to be matched, contributing to chromatic aberration correction. The following condition must also be satisfied: 0.90 < V5 / V6 < 4.50.

[0044] The refractive index of the fourth optical element is N4, which satisfies the following condition: 1.450 < N4 < 1.580. This helps to adjust the refractive index of the fourth optical element in conjunction with the front and rear optical elements to correct chromatic aberration and improve image quality.

[0045] The refractive index of the first optical element is N1, which satisfies the following condition: 1.500 < N1 < 1.600. Therefore, by limiting the range of materials selected for the first optical element, it is helpful to coordinate with the prism design and improve production efficiency.

[0046] The displacement parallel to the optical axis from the intersection of the object-side surface of the first optical element and the optical axis to the position of the maximum effective radius of the object-side surface of the first optical element is SAG1R1. The displacement parallel to the optical axis from the intersection of the image-side surface of the first optical element and the optical axis to the position of the maximum effective radius of the image-side surface of the first optical element is SAG1R2. The distance parallel to the optical axis from the position of the maximum effective radius of the object-side surface of the first optical element to the position of the maximum effective radius of the image-side surface of the first optical element is ET1. These conditions must satisfy the following: -0.10 < (SAG1R1 + SAG1R2) / ET1 < 0.35. This allows adjustment of the peripheral thickness and peripheral curvature of the first optical element, facilitating the forming of the optical element and improving manufacturability. The following condition must also be satisfied: 0.00 < (SAG1R1 + SAG1R2) / ET1 < 0.30. Please refer to Figure 39, which shows a schematic diagram of parameters SAG1R1 and SAG1R2 according to the first embodiment of this disclosure, wherein the displacement is positive in the image-side direction and negative in the object-side direction.

[0047] 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. This satisfies the following condition: 0.01 < (|R7|+|R9|) / |R2| < 2.00. This helps balance the overall optical path of the photographic lens assembly, aiding in correcting astigmatism and reducing stray light generation within the lens. It also satisfies the following condition: 0.03 < (|R7|+|R9|) / |R2| < 1.80.

[0048] The radius of curvature of the object-side surface of the fourth optical element is R7, and the radius of curvature of the image-side surface of the sixth optical element is R12, which satisfies the following condition: 1.60 < R12 / R7 < 8.00. This helps to reduce sensitivity and effectively improve image curvature. It also satisfies the following condition: 1.70 < R12 / R7 < 7.00.

[0049] The maximum effective radius of the object-side surface of the first optical element is Y1R1, and the maximum imaging height of the photographic optical lens group (which can be half the total diagonal length of the effective sensing area of ​​the electronic photosensitive element) is ImgH, which satisfies the following condition: 0.80 < Y1R1 / ImgH < 1.60. This effectively controls the height difference between the first optical element and the photosensitive element to avoid an excessively large lens size. Please refer to Figure 39, which is a schematic diagram illustrating the parameters Y1R1 and ImgH according to the first embodiment of this disclosure.

[0050] The thickness of the first optical element along the optical axis is CT1, and the thickness of the third optical element along the optical axis is CT3, which can satisfy the following condition: 0.10 < 10 × CT3 / CT1 < 3.00. This allows control over the ratio of the center thickness of the first optical element to the center thickness of the third optical element, helping to increase design freedom and reduce manufacturing tolerances. Alternatively, the following conditions can also be satisfied: 0.30 < 10 × CT3 / CT1 < 2.50. And also, the following condition can be satisfied: 0.50 < 10 × CT3 / CT1 < 2.00.

[0051] The thickness of the third optical element along the optical axis is CT3, and the focal length of the photographic lens group is f. This satisfies the following condition: 0.15 < 10 × CT3 / f < 0.60. Therefore, the center thickness of the third optical element can be adjusted to achieve a suitable focal length for the lens. This also satisfies the following condition: 0.20 < 10 × CT3 / f < 0.55.

[0052] The refractive index of the second optical element is N², which satisfies the following condition: 1.420 < N² < 1.620. This helps to adjust the refractive index of the second optical element in conjunction with the front and rear optical elements to correct chromatic aberration and aberrations, thereby improving image quality. It also satisfies the following condition: 1.450 < N² < 1.580.

[0053] The focal length of the photographic optical lens group is f, the focal length of the fifth optical element is f5, and the focal length of the sixth optical element is f6. This satisfies the following condition: -2.50 < f / f5 + f / f6 < -0.80. This helps to balance the refractive power configuration of the photographic optical lens group while correcting aberrations, thereby improving image quality.

[0054] The fifth optical element has a radius of curvature of R10 on its image-side surface, and the sixth optical element has a focal length of f6, satisfying the following condition: -0.25 < R10 / f6 < 10.00. This helps to harmonize the optical path at the image-side end of the photographic lens assembly, improving the light-gathering quality across the entire field of view. It also satisfies the following condition: -0.15 < R10 / f6 < 8.00.

[0055] The distance between the second and third optical elements on the optical axis is T23, and the thickness of the second optical element on the optical axis is CT2, which satisfies the following condition: 0.10 < T23 / CT2 < 0.80. Therefore, the distance between the second and third optical elements can be effectively controlled by the center thickness of the second optical element, which is beneficial for increasing space utilization and improving assembly yield. The following condition can also be satisfied: 0.18 < T23 / CT2 < 0.70.

[0056] According to the photographic optical lens assembly disclosed herein, the first optical element may have a reflective surface. The distance on the optical axis from the reflective surface of the first optical element to the imaging surface is P1TL, and the distance on the optical axis from the object-side surface of the first optical element to the imaging surface is TL, which can satisfy the following condition: 0.70 < P1TL / TL < 0.95. This effectively improves the flexibility of space utilization and helps to shorten the overall length. The following condition can also be satisfied: 0.78 < P1TL / TL < 0.90. Please refer to Figure 40, which is a schematic diagram illustrating the parameter P1TL according to the first embodiment of this disclosure. As shown in Figure 40, the first optical element E1 has a reflective surface P1, and the distance on the optical axis from the reflective surface P1 to the imaging surface IMG is P1TL.

[0057] The displacement parallel to the optical axis from the intersection of the object-side surface of the fifth optical element and the optical axis to the position of the maximum effective radius of the object-side surface of the fifth optical element is SAG5R1. The displacement parallel to the optical axis from the intersection of the image-side surface of the fifth optical element and the optical axis to the position of the maximum effective radius of the image-side surface of the fifth optical element is SAG5R2. The thickness of the fifth optical element on the optical axis is CT5, which can satisfy the following condition: -1.10 < (SAG5R1+SAG5R2) / CT5 < 0.80. This allows adjustment of the peripheral curvature of the fifth optical element, which is beneficial for correcting astigmatism and distortion problems. It can also satisfy the following condition: -0.90 < (SAG5R1+SAG5R2) / CT5 < 0.60. Please refer to Figure 39, which is a schematic diagram illustrating the parameters SAG5R1 and SAG5R2 according to the first embodiment of this disclosure, wherein the displacement is positive in the image-side direction and negative in the object-side direction.

[0058] The displacement parallel to the optical axis from the intersection of the image-side surface of the sixth optical element and the optical axis to the position of the maximum effective radius of the image-side surface of the sixth optical element is SAG6R2. The thickness of the sixth optical element on the optical axis is CT6, which satisfies the following condition: -0.50 < SAG6R2 / CT6 < 0.80. This effectively controls the peripheral curvature of the image-side surface of the sixth optical element, helping to adjust the incident angle of light onto the imaging surface and improve the response efficiency of the electronic photosensitive element. It also satisfies the following condition: -0.40 < SAG6R2 / CT6 < 0.60. Please refer to Figure 39, which illustrates a schematic diagram of the parameter SAG6R2 according to the first embodiment of this disclosure, where the displacement is positive in the image-side direction and negative in the object-side direction.

[0059] In the photographic optical lens assembly disclosed herein, at least one optical element may have a non-circular optically effective area on at least one of its object-side surface and image-side surface. This allows for miniaturization of the imaging device and achieves good imaging performance by aligning it with the shape of the imaging area of ​​the electronic photosensitive element. Referring to Figures 44 and 45, which are schematic diagrams illustrating the structure of the optically effective area (OEA) of a single optical element in a photographic optical lens assembly according to different embodiments of this disclosure, as shown in Figure 44, the shape of the optically effective area OEA is non-circular; preferably, the ratio of the major axis to the minor axis of the optically effective area OEA is between 1.20 and 1.90. As shown in Figure 45, the shape of the optically effective area OEA may be substantially rectangular; preferably, the ratio of the long side to the short side of the rectangle is between 1.20 and 1.90.

[0060] In the photographic optical lens assembly disclosed herein, at least one pair of parallel, opposing edges can be formed at the outer diameter of at least one optical element. This reduces the single-axis length of the optical element, which is beneficial for reducing lens volume and facilitates further miniaturization of the photographic optical lens assembly. Please refer to Figures 44 and 45, where Figure 44 is a schematic diagram illustrating the structure of a pair of chamfered edges (CSP) of a single optical element in a photographic optical lens assembly according to one embodiment of the present disclosure, and Figure 45 is a schematic diagram illustrating the structure of two pairs of chamfered edges (CSP) of a single optical element in a photographic optical lens assembly according to another embodiment of the present disclosure. The at least one pair of chamfered edges can also serve as positioning structures during the manufacturing and assembly of the optical element. Furthermore, the outer diameter of the lens barrel used to support the photographic optical lens assembly can also be cut to form at least one pair of parallel, opposing edges to reduce lens volume.

[0061] The technical features of the photographic optical lens assembly disclosed in this disclosure can be combined and configured to achieve corresponding effects.

[0062] In the photographic optical lens assembly disclosed herein, the optical elements can be made of glass or plastic. If the optical elements are made of glass, the freedom of refractive power configuration of the photographic optical lens assembly can be increased, and the influence of external environmental temperature changes on imaging can be reduced. Glass optical elements can be manufactured using techniques such as grinding or molding. If the optical elements are made of plastic, production costs can be effectively reduced. Furthermore, spherical or aspherical surfaces (ASPs) can be provided on the mirror surface. Spherical optical elements reduce manufacturing difficulty, while aspherical surfaces provide more controllable variables to reduce aberrations, decrease the number of optical elements, and effectively reduce the overall length of the photographic optical lens assembly disclosed herein. Further, aspherical surfaces can be manufactured using methods such as plastic injection molding or molding glass optical elements.

[0063] In the photographic optical lens assembly disclosed in this disclosure, if the surface of the optical element is aspherical, it means that all or part of the optically effective area of ​​the surface of the optical element is aspherical.

[0064] In the photographic optical lens assembly disclosed herein, additives can be selectively added to any (or more) optical element materials to produce light absorption or interference effects, thereby altering the transmittance of the optical element for specific wavelengths of light and reducing stray light and color shift. For example, the additives may filter out light in the 600-800 nm wavelength range to help reduce excess red or infrared light; or they may filter out light in the 350-450 nm wavelength range to reduce excess blue or ultraviolet light. Therefore, the additives can prevent specific wavelengths of light from interfering with imaging. Furthermore, the additives can be uniformly mixed into plastic and manufactured into optical elements using injection molding technology. Additionally, the additives can also be deposited on the surface of the optical element to provide the aforementioned effects.

[0065] In the photographic optical lens assembly disclosed herein, if the surface of the optical element is convex and the location of the convex surface is not defined, it means that the convex surface can be located near the optical axis of the optical element surface; if the surface of the optical element is concave and the location of the concave surface is not defined, it means that the concave surface can be located near the optical axis of the optical element surface. If the radius of curvature, refractive power, or focal length of the optical element is not defined in its region, it means that the radius of curvature, refractive power, or focal length of the optical element can be the radius of curvature, refractive power, or focal length of the optical element near the optical axis.

[0066] In the photographic optical lens assembly disclosed herein, the inflection point on the surface of the optical element refers to the point where the curvature of the optical element surface changes from positive to negative.

[0067] In the photographic optical lens assembly disclosed herein, the imaging surface of the photographic optical lens assembly can be a plane or a curved surface with any curvature, depending on the corresponding electronic photosensitive element, especially a curved surface with a concave surface facing the object side.

[0068] In the photographic optical lens assembly disclosed herein, one or more imaging correction elements (such as planar elements) can be selectively arranged between the optical element closest to the imaging plane and the imaging plane in the imaging optical path to achieve the effect of correcting image curvature (such as image warping). The optical properties of the imaging correction element, such as curvature, thickness, refractive index, position, and surface type (convex or concave, spherical or aspherical, diffractive surface, and Fresnel surface, etc.), can be adjusted according to the requirements of the imaging device. Generally, a preferred configuration of the imaging correction element is to place a thin plano-concave element with a concave surface in the object-side direction close to the imaging plane.

[0069] In the photographic optical lens assembly disclosed herein, at least one reflective element, such as a prism or reflective mirror, can be selectively disposed between the subject and the imaging surface in the imaging optical path, providing greater spatial flexibility for the photographic optical lens assembly. This allows for the thinning of electronic devices without being constrained by the overall optical length of the photographic optical lens assembly. The reflective element can be disposed between the subject and the imaging surface, particularly between the last optical element (e.g., the sixth optical element) and the imaging surface, which helps to reduce the size of the photographic optical lens assembly. The light path can be reflected once, twice, or more than three times through a single reflective element. Furthermore, the reflective element can have at least one reflective surface, and the angle between the normal direction of the reflective surface and the optical axis is not limited to 45 degrees; other angles can be used depending on spatial configuration requirements. The reflective element can redirect the light path from the optical axis near the object side to the optical axis near the image side. The angle between the optical axis vector near the object side and the optical axis vector near the image side can be any angle, not limited to 0, 90, or 180 degrees. Furthermore, to reduce space requirements, the length and width of the reflector can be unequal, and the length, width, and height of the prism can also be unequal. The surface shape of the reflecting element (e.g., the surface shape of the prism or the reflector) can be planar, spherical, aspherical, or freeform, depending on optical design requirements, but this disclosure is not limited to these. The reflecting element can be composed of one or more prisms, depending on design requirements. The prism can be made of materials such as glass or plastic, depending on design requirements.

[0070] The photographic optical lens assembly disclosed herein may include at least one aperture stop, which may be located before the first optical element, between the optical elements, or after the last optical element. The aperture stop may be of the type such as an aperture stop, a glare stop, or a field stop, and may be used to reduce stray light and help improve image quality.

[0071] In the photographic optical lens assembly disclosed in this disclosure, the aperture configuration can be either a front aperture or a center aperture. A front aperture means the aperture is positioned between the subject and the first optical element, while a center aperture means the aperture is positioned between the first optical element and the imaging plane. A front aperture allows for a longer distance between the exit pupil and the imaging plane, creating a telecentric effect and increasing the image reception efficiency of the CCD or CMOS sensor. A center aperture helps to widen the angle of view of the photographic optical lens assembly.

[0072] This disclosure may appropriately incorporate a variable aperture element, which can be a mechanical component or a light-regulating element, capable of electrically or signal-controlled aperture size and shape. The mechanical component may include movable parts such as blade assemblies or shielding plates; the light-regulating element may include masking materials such as filter elements, electrochromic materials, or liquid crystal layers. The variable aperture element can enhance image adjustment capabilities by controlling the amount of light entering the image or the exposure time. Furthermore, the variable aperture element can also be the aperture of this disclosure, allowing adjustment of image quality, such as depth of field or exposure speed, by changing the aperture value.

[0073] This disclosure allows for the appropriate placement of one or more optical components to restrict the form of light passing through a photographic optical lens assembly. These optical components may be filters, polarizers, etc., but this disclosure is not limited thereto. Furthermore, the optical components may be single-piece parts, composite components, or thin films, but this disclosure is not limited thereto. The optical components may be placed at the object end, image end, or between optical elements of the photographic optical lens assembly to control the passage of specific forms of light, thereby meeting application requirements.

[0074] The photographic optical lens assembly disclosed herein may include at least one optical lens, optical element, or carrier, at least one surface of which has a low-reflection layer. This low-reflection layer effectively reduces stray light generated by reflection at the interface. The low-reflection layer may be disposed in the ineffective area of ​​the object-side surface or image-side surface of the optical lens, or on the connecting surface between the object-side surface and the image-side surface. The optical element may be a light-shielding element, an annular spacer element, a lens barrel element, a cover glass, blue glass, a filter element (color filter), a light path deflection element (reflective element), a prism, or a mirror, etc. The carrier may be a lens mount, a micro-lens disposed on a photosensitive element, the periphery of a photosensitive element substrate, or a glass sheet used to protect the photosensitive element, etc.

[0075] In the photographic optical lens assembly disclosed herein, the object side and image side are determined according to the optical axis direction, and the data on the optical axis are calculated along the optical axis. Furthermore, if the optical axis is turned by a reflective element, the data on the optical axis are also calculated along the optical axis.

[0076] Based on the above implementation methods, specific embodiments are presented below and described in detail with reference to the accompanying drawings.

[0077] <First Embodiment>

[0078] Please refer to Figures 1 to 3. Figure 1 shows a cross-sectional view of the imaging device according to the first embodiment of this disclosure, corresponding to the diagonal direction of the effective sensing area of ​​the electronic photosensitive element. Figure 2 shows a cross-sectional view of the imaging device according to the first embodiment of this disclosure, where the optical path is turned by the first optical element and corresponds to the short side direction of the effective sensing area of ​​the electronic photosensitive element. Figure 3 shows the spherical aberration, astigmatism, and distortion curves of the first embodiment from left to right. As shown in Figures 1 and 2, the imaging device 1 includes a photographic optical lens assembly (unlabeled) and an electronic photosensitive element IS. The photographic optical lens assembly includes, from the object side to the image side, 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 element E7, and an imaging surface IMG. The electronic photosensitive element IS is disposed on the imaging surface IMG. The electronic image sensor IS is configured as a rectangular element with an aspect ratio of 4:3, but this disclosure is not limited to this. Specifically, it can be, for example, a rectangular element with an aspect ratio of 16:9 or 16:10. The photographic optical lens group contains six optical elements (E1, E2, E3, E4, E5, E6), and there are no other intercalated optical elements between them. To simplify the presentation of the refraction effect of the first optical element E1 on light, Figure 1 does not show the bending effect of the first optical element E1 on the light path. The bending effect of the first optical element E1 on the light path can be shown in Figure 2.

[0079] The first optical element E1 is a prism with positive refractive power, made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical, and its image-side surface has a point of inflection. The first optical element E1 has a reflective surface, which has the function of optical path deflection.

[0080] The second optical element E2 is a lens with positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has a point of inflection, and its image-side surface also has a point of inflection.

[0081] The third optical element E3 is a lens with negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical.

[0082] The fourth optical element E4 is a lens with positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical, and its image-side surface has a point of inflection.

[0083] The fifth optical element E5 is a lens with negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical, and its image-side surface has a point of inflection.

[0084] The sixth optical element E6 is a lens with positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical. Its object-side surface has one inflection point, and its image-side surface has two inflection points.

[0085] The filter element E7 is made of glass and is located between the sixth optical element E6 and the imaging surface IMG. It does not affect the focal length of the photographic optical lens group.

[0086] The aspherical curve equations for the above optical elements are expressed as follows:

[0087] X: The displacement parallel to the optical axis from the intersection of the aspherical surface and the optical axis to a point on the aspherical surface at a distance Y from the optical axis;

[0088] Y: The perpendicular distance between a point on the aspherical curve and the optical axis;

[0089] R: Radius of curvature;

[0090] k: cone coefficient; and

[0091] Ai: The i-th order aspherical coefficient.

[0092] In the photographic optical lens group of the first embodiment, the focal length of the photographic optical lens group is f, the entrance pupil diameter of the photographic optical lens group in the direction of the maximum entrance pupil diameter of the corresponding aperture is EPDmax, and half of the maximum angle of view in the photographic optical lens group is HFOV, with the following values: f = 15.03 mm, f / EPDmax = 2.93, HFOV = 12.7 degrees.

[0093] The maximum field of view (FOV) in a photographic optical lens group satisfies the following condition: FOV = 25.4 degrees.

[0094] The focal length of the photographic optical lens group is f, and the focal length of the first optical element E1 is f1, which satisfies the following condition: f / f1 = 0.40.

[0095] The focal length of the photographic optical lens group is f, and the focal length of the fourth optical element E4 is f4, which satisfies the following condition: f4 / f = 0.44.

[0096] The focal length of the photographic optical lens group is f, and the combined focal length of the second optical element E2 and the third optical element E3 is f23, which satisfies the following condition: f / f23 = -0.65.

[0097] The focal length of the photographic optical lens group is f, and the combined focal length of the fifth optical element E5 and the sixth optical element E6 is f56, which satisfies the following condition: f / f56 = -1.39.

[0098] The focal length of the photographic optical lens group 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. They satisfy the following condition: f / f5 + f / f6 = -1.35.

[0099] The radius of curvature 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, which satisfies the following condition: R10 / f6 = 0.13.

[0100] The radius of curvature of the object-side surface of the first optical element E1 is R1, and the radius of curvature of the object-side surface of the fourth optical element E4 is R7, which satisfies the following condition: |R7 / R1| = 0.18.

[0101] 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 second optical element E2 is R3, which satisfies the following condition: |R3 / R2| = 0.02.

[0102] 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, which satisfies the following condition: |R7 / R2| = 0.02.

[0103] 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, which satisfies the following condition: R12 / R7 = 4.00.

[0104] 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. They satisfy the following condition: (|R7|+|R9|) / |R2| = 0.08.

[0105] 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, which satisfies the following condition: (R3+R12) / (R3-R12) = -2.07.

[0106] 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. They satisfy the following condition: (R7+R9) / (R7-R9) = -0.60.

[0107] The sum of the optical axis spacing between all adjacent optical elements in the photographic lens assembly is ΣAT, the optical axis distance from the image-side surface of the sixth optical element E6 to the imaging plane IMG is BL, and the optical axis thickness sum of all optical elements in the photographic lens assembly is ΣCT, which satisfies the following condition: (ΣAT+BL) / ΣCT = 0.93. In this embodiment, the optical axis spacing between two adjacent optical elements refers to the optical axis distance between two adjacent surfaces of two adjacent optical elements. Furthermore, in this embodiment, ΣAT is equal to the sum of the optical axis spacing between the first optical element E1 and the second optical element E2, the optical axis spacing between the second optical element E2 and the third optical element E3, the optical axis spacing between the third optical element E3 and the fourth optical element E4, the optical axis spacing between the fourth optical element E4 and the fifth optical element E5, and the optical axis spacing between the fifth optical element E5 and the sixth optical element E6. Furthermore, in this embodiment, ΣCT is the sum of the thicknesses of the first optical element E1 on the optical axis, the second optical element E2 on the optical axis, the third optical element E3 on the optical axis, the fourth optical element E4 on the optical axis, the fifth optical element E5 on the optical axis, and the sixth optical element E6 on the optical axis.

[0108] The thickness of the first optical element E1 along the optical axis is CT1, the thickness of the second optical element E2 along the optical axis is CT2, the thickness of the third optical element E3 along the optical axis is CT3, the thickness of the fourth optical element E4 along the optical axis is CT4, the thickness of the fifth optical element E5 along the optical axis is CT5, and the thickness of the sixth optical element E6 along the optical axis is CT6. They satisfy the following condition: (CT2+CT3+CT4+CT5+CT6) / CT1 = 0.99.

[0109] The thickness of the third optical element E3 on the optical axis is CT3, and the focal length of the photographic optical lens group is f, which satisfies the following condition: 10×CT3 / f = 0.33.

[0110] The thickness of the first optical element E1 on the optical axis is CT1, and the thickness of the third optical element E3 on the optical axis is CT3, which satisfies the following condition: 10×CT3 / CT1 = 0.93.

[0111] The distance between the second optical element E2 and the third optical element E3 on the optical axis is T23, and the thickness of the second optical element E2 on the optical axis is CT2, which satisfies the following condition: T23 / CT2 = 0.34.

[0112] The Abbe number of the fifth optical element E5 is V5, and the Abbe number of the sixth optical element E6 is V6, which satisfies the following condition: V5 / V6 = 3.46.

[0113] The refractive index of the first optical element E1 is N1, which satisfies the following condition: N1 = 1.544.

[0114] The refractive index of the second optical element E2 is N2, which satisfies the following condition: N2 = 1.544.

[0115] The refractive index of the fourth optical element E4 is N4, which satisfies the following condition: N4 = 1.562.

[0116] The maximum effective radius of the object-side surface of the first optical element E1 is Y1R1, and the maximum imaging height of the photographic optical lens group is ImgH, which satisfies the following condition: Y1R1 / ImgH = 1.04.

[0117] The displacement parallel to the optical axis from the intersection of the object-side surface of the first optical element E1 and the optical axis to the position of the maximum effective radius of the object-side surface of the first optical element E1 is SAG1R1. The displacement parallel to the optical axis from the intersection of the image-side surface of the first optical element E1 and the optical axis to the position of the maximum effective radius of the image-side surface of the first optical element E1 is SAG1R2. The distance parallel to the optical axis from the position of the maximum effective radius of the object-side surface of the first optical element E1 to the position of the maximum effective radius of the image-side surface of the first optical element E1 is ET1. These values ​​satisfy the following condition: (SAG1R1 + SAG1R2) / ET1 = 0.06. In this embodiment, the direction of SAG1R1 points towards the image side, so the value is positive; the direction of SAG1R2 points towards the object side, so the value is negative.

[0118] The displacement parallel to the optical axis from the intersection of the object-side surface of the fifth optical element E5 with the optical axis to the position of the maximum effective radius of the object-side surface of the fifth optical element E5 is SAG5R1. The displacement parallel to the optical axis from the intersection of the image-side surface of the fifth optical element E5 with the optical axis to the position of the maximum effective radius of the image-side surface of the fifth optical element E5 is SAG5R2. The thickness of the fifth optical element E5 on the optical axis is CT5, which satisfies the following condition: (SAG5R1+SAG5R2) / CT5 = -0.04. In this embodiment, the direction of SAG5R1 points towards the object side, so the value is negative; the direction of SAG5R2 points towards the image side, so the value is positive.

[0119] The displacement parallel to the optical axis from the intersection of the image-side surface of the sixth optical element E6 with the optical axis to the position of the maximum effective radius of the image-side surface of the sixth optical element E6 is SAG6R2. The thickness of the sixth optical element E6 on the optical axis is CT6, which satisfies the following condition: SAG6R2 / CT6 = -0.0037. In this embodiment, the direction of SAG6R2 points towards the object side, so the value is negative.

[0120] The distance from the reflecting surface of the first optical element E1 to the imaging surface IMG on the optical axis is P1TL, and the distance from the object-side surface of the first optical element E1 to the imaging surface IMG on the optical axis is TL, which satisfies the following condition: P1TL / TL = 0.86.

[0121] Please refer to Table 1A and Table 1B below.

[0122] Table 1A, First Embodiment f (focal length) = 15.03 mm, f / EPDmax = 2.93, HFOV (half angle of view) = 12.7 degrees surface radius of curvature thickness Material Refractive index Abbe number focal length 0 Subject unlimited unlimited 1 First optical element 18.7518 (ASP) 5.399 plastic 1.544 55.9 37.47 2 212.7660 (ASP) 0.779 3 aperture flat 1.221 4 Second optical element 4.6861 (ASP) 1.421 plastic 1.544 55.9 11.46 5 16.8864 (ASP) 0.487 6 Third optical element -8.4049 (ASP) 0.500 plastic 1.615 25.4 -6.41 7 7.5789 (ASP) 1.287 8 Fourth optical element 3.3682 (ASP) 1.486 plastic 1.562 44.6 6.59 9 31.4080 (ASP) 1.199 10 aperture flat 0.330 11 Fifth optical element -13.3860 (ASP) 0.958 plastic 1.515 56.4 -9.31 12 7.6616 (ASP) 0.180 13 Sixth optical element 10.3932 (ASP) 1.004 plastic 1.697 16.3 57.44 14 13.4785 (ASP) 1.000 15 Filter element flat 0.110 Glass 1.517 64.2 - 16 flat 3.467 17 Imaging surface flat - The reference wavelength (d-line) is 587.6 nm. The effective radius of surface 3 (aperture S1) is 2.268 mm. The effective radius of surface 10 (aperture S2) is 1.635 mm. The first optical element E1 is a prism with refractive power. The photographic optical lens assembly may further include an aperture, and the position of the aperture may be adjusted by the configuration of the front reflective element (first optical element E1) or the chamfer of the lens.

[0123] Table 1B, Aspheric 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 <o 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 = It should be noted that there seems to be a misspelling in the "o0000595" in the original text. It is likely a typo and should probably be " ". This has been left as is in the translation to maintain the integrity of the original content.-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

[0124] Table 1A shows the detailed structural data of the first embodiment in Figure 1, where the units for radius of curvature, thickness, and focal length are millimeters (mm), and surfaces 0 to 17 sequentially represent the surfaces along the optical path from the object side to the image side. Table 1B shows the aspherical data in the first embodiment, where k is the cone coefficient in the aspherical curve equation, and A4 to A10 represent the 4th to 10th order aspherical coefficients of each surface. Furthermore, the tables for the following embodiments are corresponding schematic diagrams and aberration curves for each embodiment. The definitions of the data in the tables are the same as those in Tables 1A and 1B of the first embodiment, and will not be repeated here.

[0125] <Second Embodiment>

[0126] Please refer to Figures 4 to 6. Figure 4 shows a cross-sectional view of the imaging device according to the second embodiment of this disclosure, corresponding to the diagonal direction of the effective sensing area of ​​the electronic photosensitive element. Figure 5 shows a cross-sectional view of the imaging device according to the second embodiment of this disclosure, where the optical path is turned by the first optical element and corresponds to the short side direction of the effective sensing area of ​​the electronic photosensitive element. Figure 6 shows the spherical aberration, astigmatism, and distortion curves of the second embodiment from left to right. As shown in Figures 4 and 5, the imaging device 2 includes a photographic optical lens group (unlabeled) and an electronic photosensitive element IS. The photographic optical lens group includes, from the object side to the image side, 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 element E7, and an imaging surface IMG. The electronic photosensitive element IS is disposed on the imaging surface IMG. The electronic image sensor IS is configured as a rectangular element with an aspect ratio of 4:3, but this disclosure is not limited to this. Specifically, it can be, for example, a rectangular element with an aspect ratio of 16:9 or 16:10. The photographic optical lens group contains six optical elements (E1, E2, E3, E4, E5, E6), and there are no other intercalated optical elements between them. To simplify the presentation of the refraction effect of the first optical element E1 on light, Figure 4 does not show the bending effect of the first optical element E1 on the light path. The bending effect of the first optical element E1 on the light path can be shown in Figure 5.

[0127] The first optical element E1 is a prism with positive refractive power, made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical. The first optical element E1 has a reflective surface, which has the function of optical path deflection.

[0128] The second optical element E2 is a lens with positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has a point of inflection, and its image-side surface also has a point of inflection.

[0129] The third optical element E3 is a lens with negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical.

[0130] The fourth optical element E4 is a lens with positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical, and its image-side surface has two inflection points.

[0131] The fifth optical element E5 is a lens with negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical, and its image-side surface has a point of inflection.

[0132] The sixth optical element E6 is a lens with positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has a recurve point, and its image-side surface also has a recurve point.

[0133] The filter element E7 is made of glass and is located between the sixth optical element E6 and the imaging surface IMG. It does not affect the focal length of the photographic optical lens group.

[0134] Please refer to Table 2A and Table 2B below.

[0135] Table 2A, Second Embodiment f (focal length) = 16.42 mm, f / EPDmax = 2.80, HFOV (half angle of view) = 11.1 degrees. surface radius of curvature thickness Material Refractive index Abbe number focal length 0 Subject unlimited unlimited 1 First optical element 15.2016 (ASP) 5.266 plastic 1.545 56.1 49.98 2 30.1997 (ASP) 2.368 3 aperture flat -0.572 4 Second optical element 4.0877 (ASP) 1.489 plastic 1.545 56.1 10.23 5 13.3553 (ASP) 0.519 6 Third optical element -8.1956 (ASP) 0.500 plastic 1.615 25.3 -6.72 7 8.5368 (ASP) 1.014 8 Fourth optical element 3.5416 (ASP) 0.972 plastic 1.545 56.1 7.60 9 22.1361 (ASP) 1.224 10 aperture flat 0.292 11 Fifth optical element -9.3342 (ASP) 0.500 plastic 1.545 56.1 -7.96 12 8.2543 (ASP) 0.103 13 Sixth optical element 7.3217 (ASP) 0.625 plastic 1.669 19.5 18.76 14 16.9728 (ASP) 1.000 15 Filter element flat 0.110 Glass 1.517 64.2 - 16 flat 5.157 17 Imaging surface flat - The reference wavelength (d-line) is 587.6 nm. The effective radius of surface 3 (aperture S1) is 2.432 mm. The effective radius of surface 10 (aperture S2) is 1.500 mm. The first optical element E1 is a prism with refractive power. The photographic optical lens assembly may further include an aperture, and the position of the aperture may be adjusted by the configuration of the front reflective element (first optical element E1) or the chamfer of the lens.

[0136] Table 2B, Aspheric Coefficient 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 [[ID=D26]] 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

[0137] In the second embodiment, the equation of the aspherical curve is expressed in the form of the first embodiment. Furthermore, the definitions described in Table 2C below are the same as those in the first embodiment, and will not be repeated here.

[0138] Table 2C, Polynomial Data f [millimeters] 16.42 (R7+R9) / (R7-R9) -0.45 f / EPDmax 2.80 (ΣAT+BL) / ΣCT 1.20 HFOV [degrees] 11.1 (CT2+CT3+CT4+CT5+CT6) / CT1 0.78 FOV [degrees] 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 <00009,09> 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 / R2| 0.12 (SAG5R1+SAG5R2) / CT5 -0.27 R12 / R7 4.79 SAG6R2 / CT6 -0.06 (|R7|+|R9|) / |R2| 0.43 P1TL / TL 0.86 (R3+R12) / (R3-R12) -1.63 - -

[0139] <Third Embodiment>

[0140] Please refer to Figures 7 to 9. Figure 7 shows a cross-sectional view of the imaging device according to the third embodiment of this disclosure, corresponding to the diagonal direction of the effective sensing area of ​​the electronic photosensitive element. Figure 8 shows a cross-sectional view of the imaging device according to the third embodiment of this disclosure, where the optical path is turned by the first optical element and corresponds to the short side direction of the effective sensing area of ​​the electronic photosensitive element. Figure 9 shows the spherical aberration, astigmatism, and distortion curves of the third embodiment from left to right. As shown in Figures 7 and 8, the imaging device 3 includes a photographic optical lens group (unlabeled) and an electronic photosensitive element IS. The photographic optical lens group includes, from the object side to the image side, 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 element E7, and an imaging surface IMG. The electronic photosensitive element IS is disposed on the imaging surface IMG. The electronic image sensor IS is configured as a rectangular element with an aspect ratio of 4:3, but this disclosure is not limited to this. Specifically, it can be, for example, a rectangular element with an aspect ratio of 16:9 or 16:10. The photographic optical lens group contains six optical elements (E1, E2, E3, E4, E5, E6), and there are no other intercalated optical elements between them. To simplify the presentation of the refraction effect of the first optical element E1 on light, Figure 7 does not show the bending effect of the first optical element E1 on the light path. The bending effect of the first optical element E1 on the light path can be shown in Figure 8.

[0141] The first optical element E1 is a prism with positive refractive power, made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical. The first optical element E1 has a reflective surface, which has the function of optical path deflection.

[0142] The second optical element E2 is a lens with positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical, and its object-side surface has a point of inflection.

[0143] The third optical element E3 is a lens with negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical.

[0144] The fourth optical element E4 is a lens with positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical.

[0145] The fifth optical element, E5, is a lens with positive refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical.

[0146] The sixth optical element E6 is a lens with negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical.

[0147] The filter element E7 is made of glass and is located between the sixth optical element E6 and the imaging surface IMG. It does not affect the focal length of the photographic optical lens group.

[0148] Please refer to Table 3A and Table 3B below.

[0149] Table 3A, Third Embodiment f (focal length) = 13.41 mm, f / EPDmax = 2.70, HFOV (half angle of view) = 12.5 degrees surface radius of curvature thickness Material Refractive index Abbe number focal length 0 Subject unlimited unlimited 1 First optical element 11.5469 (ASP) 5.389 plastic 1.544 56.0 30.85 2 30.9276 (ASP) 0.800 3 Second optical element 5.4386 (ASP) 0.933 plastic 1.544 56.0 9.18 4 -57.6754 (ASP) -0.014 5 aperture flat 0.272 6 Third optical element -6.1369 (ASP) 0.500 plastic 1.584 28.2 -5.55 7 7.0696 (ASP) 2.115 8 Fourth optical element 3.1623 (ASP) 1.660 plastic 1.551 44.8 6.54 9 21.0558 (ASP) 1.370 10 aperture flat 0.605 11 Fifth optical element -18.5435 (ASP) 0.909 plastic 1.511 56.8 236.07 12 -16.3387 (ASP) 0.155 13 Sixth optical element -12.2022 (ASP) 0.921 plastic 1.551 44.8 -9.61 14 9.6026 (ASP) 0.800 15 Filter element flat 0.110 Glass 1.517 64.2 - 16 flat 2.469 17 Imaging surface flat - The reference wavelength (d-line) is 587.6 nm. The effective radius of surface 5 (aperture S1) is 1.938 mm. The effective radius of surface 10 (aperture S2) is 1.635 mm. The first optical element E1 is a prism with refractive power. The photographic optical lens assembly may further include an aperture, and the position of the aperture may be adjusted by the configuration of the front reflective element (first optical element E1) or the chamfer of the lens.

[0150] Table 3B, Aspheric 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 ​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​-2.950E-04 A10 = 3.196E-06 -1.250E-06 -1.271E-04 -4.005E-05 5.081E-05 8.712E-06

[0151] In the third embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in Table 3C below are the same as in the first embodiment and will not be repeated here.

[0152] Table 3C, Polynomial Data f [millimeters] 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 R10 / 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 - -

[0153] <Fourth Embodiment>

[0154] Please refer to Figures 10 to 12. Figure 10 shows a cross-sectional view of the imaging device according to the fourth embodiment of this disclosure, corresponding to the diagonal direction of the effective sensing area of ​​the electronic photosensitive element. Figure 11 shows a cross-sectional view of the imaging device according to the fourth embodiment of this disclosure, where the optical path is turned by the first optical element and corresponds to the short side direction of the effective sensing area of ​​the electronic photosensitive element. Figure 12 shows the spherical aberration, astigmatism, and distortion curves of the fourth embodiment from left to right. As shown in Figures 10 and 11, the imaging device 4 includes a photographic optical lens group (unlabeled) and an electronic photosensitive element IS. The photographic optical lens group includes, from the object side to the image side, 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 element E7, and an imaging surface IMG. The electronic photosensitive element IS is disposed on the imaging surface IMG. The electronic image sensor IS is configured as a rectangular element with an aspect ratio of 4:3, but this disclosure is not limited to this; specifically, it can be, for example, a rectangular element with an aspect ratio of 16:9 or 16:10. The photographic optical lens group contains six optical elements (E1, E2, E3, E4, E5, E6), and there are no other intercalated optical elements between them. To simplify the presentation of the refraction effect of the first optical element E1 on light, Figure 10 does not show the bending effect of the first optical element E1 on the light path. The bending effect of the first optical element E1 on the light path can be shown in Figure 11.

[0155] The first optical element E1 is a prism with positive refractive power, made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is also convex near the optical axis. Both surfaces are aspherical, and its object-side surface has a point of inflection. The first optical element E1 has a reflective surface, which has the function of optical path deflection.

[0156] The second optical element E2 is a lens with positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has a point of inflection, and its image-side surface also has a point of inflection.

[0157] The third optical element E3 is a lens with negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical.

[0158] The fourth optical element E4 is a lens with positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical, and its image-side surface has a point of inflection.

[0159] The fifth optical element E5 is a lens with negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical, and its image-side surface has a point of inflection.

[0160] The sixth optical element E6 is a lens with positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has a recurve point, and its image-side surface also has a recurve point.

[0161] The filter element E7 is made of glass and is located between the sixth optical element E6 and the imaging surface IMG. It does not affect the focal length of the photographic optical lens group.

[0162] Please refer to Table 4A and Table 4B below.

[0163] Table 4A, Fourth Embodiment f (focal length) = 14.26 mm, f / EPDmax = 2.63, HFOV (half angle of view) = 12.7 degrees surface radius of curvature thickness Material Refractive index Abbe number focal length 0 Subject unlimited unlimited 1 First optical element 19.2293 (ASP) 5.470 plastic 1.515 56.4 28.43 2 -55.5556 (ASP) 0.507 3 aperture flat 0.231 4 Second optical element 4.7143 (ASP) 1.299 plastic 1.511 56.8 13.19 5 14.2205 (ASP) 0.399 6 Third optical element -9.2382 (ASP) 0.500 plastic 1.614 25.6 -6.55 7 7.2571 (ASP) 1.059 8 Fourth optical element 3.3871 (ASP) 1.830 plastic 1.551 44.8 5.34 9 -17.9637 (ASP) 0.437 10 aperture flat 0.457 11 Fifth optical element -9.1608 (ASP) 0.673 plastic 1.529 45.4 -6.01 12 4.9957 (ASP) 0.262 13 Sixth optical element 7.7572 (ASP) 1.047 plastic 1.697 16.3 37.22 14 10.4519 (ASP) 0.800 15 Filter element flat 0.110 Glass 1.517 64.2 - 16 flat 4.118 17 Imaging surface flat - The reference wavelength (d-line) is 587.6 nm. The effective radius of surface 3 (aperture S1) is 2.450 mm. The effective radius of surface 10 (aperture S2) is 1.742 mm. The first optical element E1 is a prism with refractive power. The photographic optical lens assembly may further include an aperture, and the position of the aperture may be adjusted by the configuration of the front reflective element (first optical element E1) or the chamfer of the lens.

[0164] Table 4B, Aspheric Coefficient 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

[0165] In the fourth embodiment, the equation of the aspherical curve is expressed in the form of the first embodiment. Furthermore, the definitions described in Table 4C below are the same as those in the first embodiment, and will not be repeated here.

[0166] Table 4C, Polynomial Data f [millimeters] 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 R10 / 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 - -

[0167] <Example 5>

[0168] Please refer to Figures 13 to 15. Figure 13 shows a cross-sectional view of the imaging device according to the fifth embodiment of this disclosure, corresponding to the diagonal direction of the effective sensing area of ​​the electronic photosensitive element. Figure 14 shows a cross-sectional view of the imaging device according to the fifth embodiment of this disclosure, where the optical path is turned by the first optical element and corresponds to the short side direction of the effective sensing area of ​​the electronic photosensitive element. Figure 15 shows the spherical aberration, astigmatism, and distortion curves of the fifth embodiment from left to right. As shown in Figures 13 and 14, the imaging device 5 includes a photographic optical lens group (unlabeled) and an electronic photosensitive element IS. The photographic optical lens group includes, from the object side to the image side, 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 element E7, and an imaging surface IMG. The electronic photosensitive element IS is disposed on the imaging surface IMG. The electronic image sensor IS is configured as a rectangular element with an aspect ratio of 4:3, but this disclosure is not limited to this; specifically, it can be, for example, a rectangular element with an aspect ratio of 16:9 or 16:10. The photographic optical lens group contains six optical elements (E1, E2, E3, E4, E5, E6), and there are no other intercalated optical elements between them. To simplify the presentation of the refraction effect of the first optical element E1 on light, Figure 13 does not show the bending effect of the first optical element E1 on the light path. The bending effect of the first optical element E1 on the light path can be shown in Figure 14.

[0169] The first optical element E1 is a prism with positive refractive power, made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is also convex near the optical axis. Both surfaces are aspherical, and its object-side surface has a point of inflection. The first optical element E1 has a reflective surface, which has the function of optical path deflection.

[0170] The second optical element E2 is a lens with positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has a point of inflection, and its image-side surface also has a point of inflection.

[0171] The third optical element E3 is a lens with negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical, and its object-side surface has two inflection points.

[0172] The fourth optical element E4 is a lens with positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical.

[0173] The fifth optical element E5 is a lens with negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical, and its image-side surface has a point of inflection.

[0174] The sixth optical element E6 is a lens with positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical. Its object-side surface has one inflection point, and its image-side surface has two inflection points.

[0175] The filter element E7 is made of glass and is located between the sixth optical element E6 and the imaging surface IMG. It does not affect the focal length of the photographic optical lens group.

[0176] Please refer to Table 5A and Table 5B below.

[0177] Table 5A, Fifth Embodiment f (focal length) = 14.17 mm, f / EPDmax = 2.72, HFOV (half angle of view) = 12.6 degrees surface radius of curvature thickness Material Refractive index Abbe number focal length 0 Subject unlimited unlimited 1 First optical element 25.0080 (ASP) 5.500 plastic 1.530 55.8 24.17 2 -24.2903 (ASP) 0.803 3 aperture flat 0.334 4 Second optical element 4.3478 (ASP) 0.831 plastic 1.511 56.8 17.46 5 7.9329 (ASP) 0.433 6 Third optical element -13.5753 (ASP) 0.500 plastic 1.587 28.3 -7.78 7 6.9823 (ASP) 1.344 8 Fourth optical element 4.3478 (ASP) 1.883 plastic 1.544 56.0 6.66 9 -18.3556 (ASP) 0.849 10 aperture flat 0.663 11 Fifth optical element -34.1884 (ASP) 1.405 plastic 1.534 56.0 -7.95 12 4.9211 (ASP) 0.380 13 Sixth optical element 8.8430 (ASP) 1.543 plastic 1.642 22.5 72.24 14 10.1824 (ASP) 0.800 15 Filter element flat 0.110 Glass 1.517 64.2 - 16 flat 2.880 17 Imaging surface flat - The reference wavelength (d-line) is 587.6 nm. The effective radius of surface 3 (aperture S1) is 2.345 mm. The effective radius of surface 10 (aperture S2) is 1.745 mm. The first optical element E1 is a prism with refractive power. The photographic optical lens assembly may further include an aperture, and the position of the aperture may be adjusted by the configuration of the front reflective element (first optical element E1) or the chamfer of the lens.

[0178] Table 5B, Aspherical Coefficient 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

[0179] In the fifth embodiment, the equation of the aspherical curve is expressed in the form of the first embodiment. Furthermore, the definitions described in Table 5C below are the same as those in the first embodiment, and will not be repeated here.

[0180] Table 5C, Polynomial Data f [millimeters] 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 R10 / 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 SAG6R2 / CT6 0.05 (|R7| + |R9|) / |R2| 1.59 P1TL / TL 0.86 (R3 + R12) / (R3 - R12) -2.49 - -

[0181] <Sixth Embodiment>

[0182] Please refer to Figures 16 to 18. Figure 16 shows a cross-sectional view of the imaging device according to the sixth embodiment of this disclosure, corresponding to the diagonal direction of the effective sensing area of ​​the electronic photosensitive element. Figure 17 shows a cross-sectional view of the imaging device according to the sixth embodiment of this disclosure, where the optical path is turned by the first optical element and corresponds to the short side direction of the effective sensing area of ​​the electronic photosensitive element. Figure 18 shows the spherical aberration, astigmatism, and distortion curves of the sixth embodiment from left to right. As shown in Figures 16 and 17, the imaging device 6 includes a photographic optical lens group (unlabeled) and an electronic photosensitive element IS. The photographic optical lens group includes, from the object side to the image side, 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 element E7, and an imaging surface IMG. The electronic photosensitive element IS is disposed on the imaging surface IMG. The electronic image sensor IS is configured as a rectangular element with an aspect ratio of 4:3, but this disclosure is not limited to this. Specifically, it can be, for example, a rectangular element with an aspect ratio of 16:9 or 16:10. The photographic optical lens group contains six optical elements (E1, E2, E3, E4, E5, E6), and there are no other intercalated optical elements between them. To simplify the presentation of the refraction effect of the first optical element E1 on light, Figure 16 does not show the bending effect of the first optical element E1 on the light path. The bending effect of the first optical element E1 on the light path can be shown in Figure 17.

[0183] The first optical element E1 is a prism with positive refractive power, made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical. The first optical element E1 has a reflective surface, which has the function of optical path deflection.

[0184] The second optical element E2 is a lens with negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical, and its image-side surface has a point of inflection.

[0185] The third optical element E3 is a lens with positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical. Its object-side surface has one inflection point, and its image-side surface has two inflection points.

[0186] The fourth optical element E4 is a lens with positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical.

[0187] The fifth optical element E5 is a lens with negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical.

[0188] The sixth optical element E6 is a lens with positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical.

[0189] The filter element E7 is made of glass and is located between the sixth optical element E6 and the imaging surface IMG. It does not affect the focal length of the photographic optical lens group.

[0190] Please refer to Table 6A and Table 6B below.

[0191] Table 6A, Sixth Embodiment f (focal length) = 15.10 mm, f / EPDmax = 2.66, HFOV (half angle of view) = 12.3 degrees surface radius of curvature thickness Material Refractive index Abbe number focal length 0 Subject unlimited unlimited 1 First optical element 14.0845 (ASP) 5.320 plastic 1.544 56.0 29.91 2 90.9091 (ASP) 0.830 3 aperture flat 0.218 4 Second optical element 7.3115 (ASP) 0.786 plastic 1.529 45.4 -11.01 5 3.1216 (ASP) 0.382 6 Third optical element 6.9724 (ASP) 0.775 plastic 1.544 55.9 11.04 7 -41.2793 (ASP) 0.200 8 Fourth optical element 3.2145 (ASP) 1.588 plastic 1.544 56.0 9.20 9 7.4210 (ASP) 0.375 10 aperture flat 0.147 11 Fifth optical element -14.1647 (ASP) 1.430 plastic 1.639 23.5 -6.95 12 6.7239 (ASP) 3.336 13 Sixth optical element 7.3469 (ASP) 1.980 plastic 1.697 16.3 28.94 14 10.2744 (ASP) 1.500 15 Filter element flat 0.110 Glass 1.517 64.2 - 16 flat 1.401 17 Imaging surface flat - The reference wavelength (d-line) is 587.6 nm. The effective radius of surface 3 (aperture S1) is 2.464 mm. The effective radius of surface 10 (aperture S2) is 1.813 mm. The first optical element E1 is a prism with refractive power. The photographic optical lens assembly may further include an aperture, and the position of the aperture may be adjusted by the configuration of the front reflective element (first optical element E1) or the chamfer of the lens.

[0192] Table 6B, Aspheric Coefficient 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 = - [[ID=5M]] - -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 = It should be noted that there seems to be an error in the original text where "[[ID=5M]]" is likely a mislabeled tag. It should probably be "" as per the sequence. This translation has been done with the assumption of correcting this potential error for the sake of a more coherent translation. If this is not an error, please clarify the correct intention of the "[[ID=5M]]" tag. 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

[0193] In the sixth embodiment, the equation of the aspherical curve is expressed in the form of the first embodiment. Furthermore, the definitions described in Table 6C below are the same as those in the first embodiment, and will not be repeated here.

[0194] Table 6C, Polynomial Data f [mm] 15.10 (R7 + R9) / (R7 - R9) -0.63 f / EPDmax 2.66 (ΣAT + BL) / ΣCT 0.72 HFOV [degrees] 12.3 (CT2 + CT3 + CT4 + CT5 + CT6) / CT1 1.23 FOV [degrees] 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 R10 / 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 - -

[0195] <Seventh Embodiment>

[0196] Please refer to Figures 19 to 21. Figure 19 shows a cross-sectional view of the imaging device according to the seventh embodiment of this disclosure, corresponding to the diagonal direction of the effective sensing area of ​​the electronic photosensitive element. Figure 20 shows a cross-sectional view of the imaging device according to the seventh embodiment of this disclosure, where the optical path is turned by the first optical element and corresponds to the short side direction of the effective sensing area of ​​the electronic photosensitive element. Figure 21 shows the spherical aberration, astigmatism, and distortion curves of the seventh embodiment from left to right. As shown in Figures 19 and 20, the imaging device 7 includes a photographic optical lens group (unlabeled) and an electronic photosensitive element IS. The photographic optical lens group includes, from the object side to the image side, 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 element E7, and an imaging surface IMG. The electronic photosensitive element IS is disposed on the imaging surface IMG. The electronic image sensor IS is configured as a rectangular element with an aspect ratio of 4:3, but this disclosure is not limited to this. Specifically, it can be, for example, a rectangular element with an aspect ratio of 16:9 or 16:10. The photographic optical lens group contains six optical elements (E1, E2, E3, E4, E5, E6), and there are no other intercalated optical elements between them. To simplify the presentation of the refraction effect of the first optical element E1 on light, Figure 19 does not show the bending effect of the first optical element E1 on the light path. The bending effect of the first optical element E1 on the light path can be shown in Figure 20.

[0197] The first optical element E1 is a prism with positive refractive power, made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical. The first optical element E1 has a reflective surface, which has the function of optical path deflection.

[0198] The second optical element E2 is a lens with positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical, and its object-side surface has a point of inflection.

[0199] The third optical element E3 is a lens with negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical.

[0200] The fourth optical element E4 is a lens with positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical, and its image-side surface has two inflection points.

[0201] The fifth optical element, E5, is a lens with negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical.

[0202] The sixth optical element E6 is a lens with negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical, and its image-side surface has two inflection points.

[0203] The filter element E7 is made of glass and is located between the sixth optical element E6 and the imaging surface IMG. It does not affect the focal length of the photographic optical lens group.

[0204] Please refer to Table 7A and Table 7B below.

[0205] Table 7A, Seventh Embodiment f (focal length) = 13.85 mm, f / EPDmax = 2.68, HFOV (half angle of view) = 12.7 degrees surface radius of curvature thickness Material Refractive index Abbe number focal length 0 Subject unlimited unlimited 1 First optical element 11.0679 (ASP) 5.380 plastic 1.544 56.0 24.42 2 54.9566 (ASP) 1.040 3 aperture flat -0.240 4 Second optical element 5.9432 (ASP) 0.931 plastic 1.544 56.0 10.04 5 -63.4745 (ASP) 0.259 6 Third optical element -6.1339 (ASP) 0.500 plastic 1.614 26.0 -5.23 7 6.9375 (ASP) 1.618 8 Fourth optical element 3.0799 (ASP) 1.700 plastic 1.566 37.4 5.69 9 57.2441 (ASP) 0.945 10 aperture flat 0.392 11 Fifth optical element -9.8032 (ASP) 1.293 plastic 1.511 56.8 -22.14 12 -76.9231 (ASP) 0.157 13 Sixth optical element -21.2800 (ASP) 0.663 plastic 1.566 37.4 -14.47 14 13.4599 (ASP) 0.800 15 Filter element flat 0.110 Glass 1.517 64.2 - 16 flat 3.136 17 Imaging surface flat - The reference wavelength (d-line) is 587.6 nm. The effective radius of surface 3 (aperture S1) is 2.103 mm. The effective radius of surface 10 (aperture S2) is 1.620 mm. The first optical element E1 is a prism with refractive power. The photographic optical lens assembly may further include an aperture, and the position of the aperture may be adjusted by the configuration of the front reflective element (first optical element E1) or the chamfer of the lens.

[0206] 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

[0207] In the seventh embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in Table 7C below are the same as in the first embodiment and will not be repeated here.

[0208] Table 7C, Polynomial Data f [millimeters] 13.85 (R7+R9) / (R7-R9) -0.52 f / EPDmax 2.68 (ΣAT+BL) / ΣCT 0.79 HFOV [degree] 12.7 (CT2+CT3+CT4+CT5+CT6) / CT1 0.95 FOV [degree] 25.4 10×CT3 / f 0.36 f / f1 0.57 10×CT3 / CT1 0.93 f4 / f 0.41 T23 / CT2 0.28 f / f23 -1.02 V5 / V6 1.52 f / f56 -1.64 N1 1.544 f / f5 + f / f6 -1.58 N2 1.544 R10 / f6 5.32 N4 1.566 |R7 / R1| 0.28 Y1R1 / ImgH 1.16 |R3 / R2| 0.11 (SAG1R1 + SAG1R2) / ET1 0.13 |R7 / R2| 0.06 (SAG5R1 + SAG5R2) / CT5 -0.32 R12 / R7 4.37 SAG6R2 / CT6 0.13 (|R7| + |R9|) / |R2| 0.23 P1TL / TL 0.85 (R3 + R12) / (R3 - R12) -2.58 - -

[0209] <Eighth Embodiment>

[0210] Please refer to Figures 22 to 24. Figure 22 shows a cross-sectional view of the imaging device according to the eighth embodiment of this disclosure, corresponding to the diagonal direction of the effective sensing area of ​​the electronic photosensitive element. Figure 23 shows a cross-sectional view of the imaging device according to the eighth embodiment of this disclosure, where the optical path is turned by the first optical element and corresponds to the short side direction of the effective sensing area of ​​the electronic photosensitive element. Figure 24 shows the spherical aberration, astigmatism, and distortion curves of the eighth embodiment from left to right. As shown in Figures 22 and 23, the imaging device 8 includes a photographic optical lens group (unlabeled) and an electronic photosensitive element IS. The photographic optical lens group includes, from the object side to the image side, 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 element E7, and an imaging surface IMG. The electronic photosensitive element IS is disposed on the imaging surface IMG. The electronic image sensor IS is configured as a rectangular element with an aspect ratio of 4:3, but this disclosure is not limited to this; specifically, it can be, for example, a rectangular element with an aspect ratio of 16:9 or 16:10. The photographic optical lens group contains six optical elements (E1, E2, E3, E4, E5, E6), and there are no other intercalated optical elements between them. To simplify the presentation of the refraction effect of the first optical element E1 on light, Figure 22 does not show the bending effect of the first optical element E1 on the light path. The bending effect of the first optical element E1 on the light path can be shown in Figure 23.

[0211] The first optical element E1 is a prism with positive refractive power, made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical, and its image-side surface has a point of inflection. The first optical element E1 has a reflective surface, which has the function of optical path deflection.

[0212] The second optical element E2 is a lens with positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has a point of inflection, and its image-side surface also has a point of inflection.

[0213] The third optical element E3 is a lens with negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical, and its image-side surface has a point of inflection.

[0214] The fourth optical element E4 is a lens with positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical.

[0215] The fifth optical element E5 is a lens with negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical, and its image-side surface has a point of inflection.

[0216] The sixth optical element E6 is a lens with positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical. Its object-side surface has two inflection points, and its image-side surface also has two inflection points.

[0217] The filter element E7 is made of glass and is located between the sixth optical element E6 and the imaging surface IMG. It does not affect the focal length of the photographic optical lens group.

[0218] Please refer to Table 8A and Table 8B below.

[0219] Table 8A, Eighth Embodiment f (focal length) = 14.56 mm, f / EPDmax = 2.48, HFOV (half angle of view) = 13.0 degrees surface radius of curvature thickness Material Refractive index Abbe number focal length 0 Subject unlimited unlimited 1 First optical element 17.2775 (ASP) 5.382 Glass 1.589 61.3 36.60 2 76.9231 (ASP) 1.132 3 aperture flat -0.412 4 Second optical element 4.4950 (ASP) 1.163 Glass 1.517 64.2 10.26 5 26.8829 (ASP) 0.370 6 Third optical element -6.9369 (ASP) 0.500 plastic 1.566 37.4 -6.09 7 7.0381 (ASP) 1.507 8 Fourth optical element 3.2521 (ASP) 1.830 Glass 1.569 56.0 7.17 9 12.8032 (ASP) 1.451 10 aperture flat 0.484 11 Fifth optical element -15.0162 (ASP) 0.693 plastic 1.566 37.4 -9.59 12 8.6506 (ASP) 0.719 13 Sixth optical element 8.4506 (ASP) 1.036 plastic 1.669 19.5 33.43 14 12.9160 (ASP) 0.800 15 Filter element flat 0.110 Glass 1.517 64.2 - 16 flat 2.944 17 Imaging surface flat - The reference wavelength (d-line) is 587.6 nm. The effective radius of surface 3 (aperture S1) is 2.527 mm. The effective radius of surface 10 (aperture S2) is 1.830 mm. The first optical element E1 is a prism with refractive power. The photographic optical lens assembly may further include an aperture, and the position of the aperture may be adjusted by the configuration of the front reflective element (first optical element E1) or the chamfer of the lens.

[0220] Table 8B, Aspheric Coefficient 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 - -

[0221] In the eighth embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in Table 8C below are the same as in the first embodiment and will not be repeated here.

[0222] Table 8C, Polynomial Data f [millimeters] 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 f / f23 -0.64 V5 / V6 1.92 f / f56 -1.09 N1 1.589 f / f5+f / f6 -1.08 N2 1.517 R10 / 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 - -

[0223] Example 9

[0224] Please refer to Figures 25 to 27. Figure 25 shows a cross-sectional view of the imaging device according to the ninth embodiment of this disclosure, corresponding to the diagonal direction of the effective sensing area of ​​the electronic photosensitive element. Figure 26 shows a cross-sectional view of the imaging device according to the ninth embodiment of this disclosure, where the optical path is turned by the first optical element and corresponds to the short side direction of the effective sensing area of ​​the electronic photosensitive element. Figure 27 shows the spherical aberration, astigmatism, and distortion curves of the ninth embodiment from left to right. As shown in Figures 25 and 26, the imaging device 9 includes a photographic optical lens group (unlabeled) and an electronic photosensitive element IS. The photographic optical lens group includes, from the object side to the image side, 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 element E7, and an imaging surface IMG. The electronic photosensitive element IS is disposed on the imaging surface IMG. The electronic image sensor IS is configured as a rectangular element with an aspect ratio of 4:3, but this disclosure is not limited to this; specifically, it can be, for example, a rectangular element with an aspect ratio of 16:9 or 16:10. The photographic optical lens group contains six optical elements (E1, E2, E3, E4, E5, E6), and there are no other intercalated optical elements between them. To simplify the presentation of the refraction effect of the first optical element E1 on light, Figure 25 does not show the bending effect of the first optical element E1 on the light path. The bending effect of the first optical element E1 on the light path can be shown in Figure 26.

[0225] The first optical element E1 is a prism with positive refractive power, made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical. The first optical element E1 has a reflective surface, which has the function of optical path deflection.

[0226] The second optical element E2 is a lens with positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has a point of inflection, and its image-side surface also has a point of inflection.

[0227] The third optical element E3 is a lens with negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical, and its object-side surface has two inflection points.

[0228] The fourth optical element E4 is a lens with positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical, and its image-side surface has a point of inflection.

[0229] The fifth optical element E5 is a lens with negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has a point of inflection, and its image-side surface also has a point of inflection.

[0230] The sixth optical element E6 is a lens with negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical. Its object-side surface has two inflection points, and its image-side surface also has two inflection points.

[0231] The filter element E7 is made of glass and is located between the sixth optical element E6 and the imaging surface IMG. It does not affect the focal length of the photographic optical lens group.

[0232] Please refer to Table 9A and Table 9B below.

[0233] Table 9A, Ninth Embodiment f (focal length) = 15.60 mm, f / EPDmax = 2.80, HFOV (half angle of view) = 11.6 degrees surface radius of curvature thickness Material Refractive index Abbe number focal length 0 Subject unlimited unlimited 1 First optical element 16.6427 (ASP) 5.494 plastic 1.534 56.0 24.25 2 -51.7468 (ASP) 0.650 3 Aperture flat 1.350 4 Second optical element 4.8933 (ASP) 0.899 plastic 1.544 55.9 12.21 5 17.4313 (ASP) 0.356 6 Third optical element -8.3813 (ASP) 0.466 plastic 1.584 28.2 -6.38 7 6.8475 (ASP) 1.913 8 Fourth optical element 3.7721 (ASP) 1.883 plastic 1.551 44.8 7.50 9 35.7715 (ASP) 0.251 10 Aperture flat 0.071 11 Fifth optical element 20.9831 (ASP) 1.401 plastic 1.511 56.8 -12.83 12 4.8803 (ASP) 2.081 13 Sixth optical element 9.1104 (ASP) 1.562 plastic 1.615 25.4 -1591.26 14 8.4372 (ASP) 0.800 15 Filter element flat 0.110 Glass 1.517 64.2 - 16 flat 2.510 17 Imaging surface flat - The reference wavelength (d-line) is 587.6 nm. The effective radius of surface 3 (aperture S1) is 2.419 mm. The effective radius of surface 10 (aperture S2) is 1.778 mm. The first optical element E1 is a prism with refractive power. The photographic optical lens assembly may further include an aperture, and the position of the aperture may be adjusted by the configuration of the front reflective element (first optical element E1) or the chamfer of the lens.

[0234] Table 9B, Aspheric Coefficient 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

[0235] In the ninth embodiment, the equation of the aspherical curve is expressed in the form of the first embodiment. Furthermore, the definitions described in Table 9C below are the same as those in the first embodiment, and will not be repeated here.

[0236] Table 9C, Polynomial Data f [millimeters] 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 R10 / 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 - -

[0237] <Tenth Embodiment>

[0238] Please refer to Figures 28 to 30. Figure 28 shows a cross-sectional view of an imaging device according to the tenth embodiment of this disclosure, corresponding to the diagonal direction of the effective sensing area of ​​the electronic photosensitive element. Figure 29 shows a cross-sectional view of the imaging device according to the tenth embodiment of this disclosure, where the optical path is turned by the first optical element and corresponds to the short side direction of the effective sensing area of ​​the electronic photosensitive element. Figure 30 shows the spherical aberration, astigmatism, and distortion curves of the tenth embodiment from left to right. As shown in Figures 28 and 29, the imaging device 10 includes a photographic optical lens assembly (unlabeled) and an electronic photosensitive element IS. The photographic optical lens assembly includes, from the object side to the image side, 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 element E7, and an imaging surface IMG. The electronic photosensitive element IS is disposed on the imaging surface IMG. The electronic image sensor IS is configured as a rectangular element with an aspect ratio of 4:3, but this disclosure is not limited to this; specifically, it can be, for example, a rectangular element with an aspect ratio of 16:9 or 16:10. The photographic optical lens group contains six optical elements (E1, E2, E3, E4, E5, E6), and there are no other intercalated optical elements between them. To simplify the presentation of the refraction effect of the first optical element E1 on light, Figure 28 does not show the bending effect of the first optical element E1 on the light path. The bending effect of the first optical element E1 on the light path can be shown in Figure 29.

[0239] The first optical element E1 is a prism with positive refractive power, made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical. The first optical element E1 has a reflective surface, which has the function of optical path deflection.

[0240] The second optical element E2 is a lens with positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has a point of inflection, and its image-side surface also has a point of inflection.

[0241] The third optical element E3 is a lens with negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical, and its object-side surface has two inflection points.

[0242] The fourth optical element E4 is a lens with positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical, and its image-side surface has a point of inflection.

[0243] The fifth optical element E5 is a lens with negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical, and its image-side surface has a point of inflection.

[0244] The sixth optical element E6 is a lens with positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has a recurve point, and its image-side surface also has a recurve point.

[0245] The filter element E7 is made of glass and is located between the sixth optical element E6 and the imaging surface IMG. It does not affect the focal length of the photographic optical lens group.

[0246] Please refer to Table 10A and Table 10B below.

[0247] Table 10A, Tenth Embodiment f (focal length) = 14.84 mm, f / EPDmax = 2.68, HFOV (half angle of view) = 12.0 degrees surface radius of curvature thickness Material Refractive index Abbe number focal length 0 Subject unlimited unlimited 1 First optical element 14.6599 (ASP) 5.329 plastic 1.511 56.8 42.11 2 40.3587 (ASP) 1.080 3 Aperture flat 0.041 4 Second optical element 4.6731 (ASP) 0.771 plastic 1.544 56.0 24.23 5 6.8182 (ASP) 0.344 6 Third optical element -524.3971 (ASP) 0.430 plastic 1.660 20.4 -20.49 7 13.8874 (ASP) 2.183 8 Fourth optical element 4.3303 (ASP) 1.620 plastic 1.544 56.0 10.90 9 13.9256 (ASP) 2.412 10 Aperture flat 0.888 11 Fifth optical element -16.6889 (ASP) 0.910 plastic 1.566 37.4 -9.38 12 7.9412 (ASP) 0.171 13 Sixth optical element 11.3125 (ASP) 1.470 plastic 1.697 16.3 57.00 14 14.9704 (ASP) 1.500 15 Filter element flat 0.110 Glass 1.517 64.2 - 16 flat 0.996 17 Imaging surface flat - The reference wavelength (d-line) is 587.6 nm. The effective radius of surface 3 (aperture S1) is 2.365 mm. The effective radius of surface 10 (aperture S2) is 1.860 mm. The first optical element E1 is a prism with refractive power. The photographic optical lens assembly may further include an aperture, and the position of the aperture may be adjusted by the configuration of the front reflective element (first optical element E1) or the chamfer of the lens.

[0248] Table 10B, Aspheric Coefficients surface 1 2 4 5 6 7 k = -1.59009E+00 3.38164E+01 -2.59541E+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

[0249] In the tenth embodiment, the equation of the aspherical curve is expressed in the form of the first embodiment. Furthermore, the definitions described in Table 10C below are the same as those in the first embodiment, and will not be repeated here.

[0250] Table 10C, Polynomial Data f [millimeters] 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 10×CT3 / f 0.29 f / f1 0.35 10×CT3 / CT1 0.81 f4 / f 0.73 T23 / CT2 0.45 f / f23 -0.05 V5 / V6 2.29 f / f56 -1.38 N1 1.511 f / f5+f / f6 -1.32 N2 1.544 R10 / f6 0.14 N4 1.544 |R7 / R1| 0.30 Y1R1 / ImgH 1.20 |R3 / R2| 0.12 (SAG1R1+SAG1R2) / ET1 0.13 |R7 / R2| 0.11 (SAG5R1+SAG5R2) / CT5 -0.23 R12 / R7 3.46 SAG6R2 / CT6 0.01 (|R7|+|R9|) / |R2| 0.52 P1TL / TL 0.86 (R3+R12) / (R3-R12) -1.91 - -

[0251] <Eleventh Embodiment>

[0252] Please refer to Figure 31, which is a perspective view of an image capturing device according to the eleventh embodiment of this disclosure. In this embodiment, the image capturing device 100 is a camera module. The image capturing device 100 includes an imaging lens 101, a driving device 102, an electronic photosensitive element 103, and an image stabilization module 104. The imaging lens 101 includes the photographic optical lens group of the first embodiment described above, a lens barrel (not otherwise labeled) for supporting the photographic optical lens group, and a support device (Holder Member, not otherwise labeled). The imaging lens 101 can also be replaced with the photographic optical lens group of other embodiments described above, and this disclosure is not limited thereto. The image capturing device 100 uses the imaging lens 101 to focus light to generate an image, and cooperates with the driving device 102 to focus the image, finally imaging it on the electronic photosensitive element 103 and outputting it as image data.

[0253] The driving device 102 may have an auto-focus function, and its driving method may include drive systems such as screw, voice coil motor (VCM), microelectromechanical systems (MEMS), piezoelectric systems, shape memory alloys, spring type, or ball type, but this disclosure is not limited to these. The driving device 102 allows the imaging lens 101 to achieve a better imaging position, enabling clear images of the subject at different object distances. In addition, the image capturing device 100 is equipped with a high-sensitivity and low-noise electronic image sensor 103 (such as CMOS or CCD) located on the imaging surface of the photographic optical lens assembly, which can truly present the good imaging quality of the photographic optical lens assembly.

[0254] The image stabilization module 104 can be, for example, an accelerometer, a gyroscope, or a Hall effect sensor. The driving device 102 can work in conjunction with the image stabilization module 104 to form an optical image stabilization (OIS) device. This compensates for blurry images caused by camera shake during shooting by adjusting the changes in different axes of the imaging lens 101, or utilizes image compensation technology in the imaging software to provide electronic image stabilization (EIS), further improving image quality in dynamic and low-light scenes. Some movable elements in the image capturing device 100 can be driven by the driving device 102 to compensate for image tilt in real time, achieving optical image stabilization. For example, the driving device 102 can drive some optical elements of the photographic lens assembly or movable elements such as the electronic image sensor 103, allowing these movable elements to move in a direction parallel to the optical axis, tilted to the optical axis, or perpendicular to the optical axis. However, this disclosure is not limited to the driving methods disclosed above.

[0255] <Twelfth Embodiment>

[0256] Please refer to Figures 32 to 34, wherein Figure 32 shows a perspective view of one side of an electronic device according to the twelfth embodiment of the present disclosure, Figure 33 shows a perspective view of the other side of the electronic device of Figure 32, and Figure 34 shows a system block diagram of the electronic device of Figure 32.

[0257] In this embodiment, the electronic device 200 is a smartphone. The electronic device 200 includes, according to the eleventh embodiment, image capturing devices 100, 100a, 100b, 100c, 100d, and 100e, a flash module 201, a focus assist module 202, an image signal processor 203, a display module 204, and an image software processor 205. Image capturing devices 100, 100a, and 100b are all located on the same side of the electronic device 200 and are all single-focus. The focus assist module 202 may employ a laser ranging or a Time-of-Flight (ToF) module, but this disclosure is not limited to these. Image capturing devices 100c, 100d, 100e, and display module 204 are all located on the other side of electronic device 200. Display module 204 can serve as a user interface, allowing image capturing devices 100c, 100d, and 100e to function as front-facing lenses for selfies; however, this disclosure is not limited to this. Furthermore, image capturing devices 100a, 100b, 100c, 100d, and 100e can all include the photographic optical lens group disclosed herein and can all have a structural configuration similar to that of image capturing device 100. Specifically, each of image capturing devices 100a, 100b, 100c, 100d, and 100e can include an imaging lens, a driving device, an electronic photosensitive element, and an image stabilization module, and each can include a reflective element as a component for deflecting the light path. The imaging lenses of imaging devices 100a, 100b, 100c, 100d and 100e may each include, for example, the photographic optical lens group disclosed herein, a lens barrel for carrying the photographic optical lens group and a support device.

[0258] Image capturing device 100 is a telescopic image capturing device with a bend in the optical path. Image capturing device 100a is a wide-angle image capturing device, image capturing device 100b is an ultra-wide-angle image capturing device, image capturing device 100c is a wide-angle image capturing device, image capturing device 100d is an ultra-wide-angle image capturing device, and image capturing device 100e is a time-of-flight ranging image capturing device. In this embodiment, image capturing devices 100, 100a, and 100b have different viewing angles, allowing the electronic device 200 to provide different magnifications to achieve optical zoom shooting effects. In addition, image capturing device 100e can acquire depth information of the image. The maximum viewing angle in image capturing device 100 can differ from that in image capturing device 100a by more than 30 degrees, and the maximum viewing angle in image capturing device 100b can differ from that in image capturing device 100 by more than 30 degrees. The electronic device 200 described above includes multiple image capturing devices 100, 100a, 100b, 100c, 100d, and 100e as an example, but the number and configuration of the image capturing devices are not intended to limit this disclosure.

[0259] When the user photographs the subject 206, the electronic device 200 uses the image capturing device 100, image capturing device 100a, or image capturing device 100b to focus the light and activate the flash module 201 for supplemental lighting. It also uses the subject distance information provided by the focus assist module 202 for fast focusing, and the image signal processor 203 performs image optimization processing to further improve the image quality produced by the photographic optical lens assembly. The focus assist module 202 can use an infrared or laser focus assist system to achieve fast focusing. In addition, the electronic device 200 can also use the image capturing device 100c, image capturing device 100d, or image capturing device 100e for shooting. The display module 204 can use a touch screen and, in conjunction with the diverse functions of the image software processor 205, can perform image shooting and image processing (or can use a physical shooting button). The image processed by the image software processor 205 can be displayed on the display module 204.

[0260] <Thirteenth Embodiment>

[0261] Please refer to Figures 35 and 36, wherein Figure 35 shows a schematic diagram of one side of an electronic device according to the thirteenth embodiment of the present disclosure, and Figure 36 shows a schematic diagram of the other side of the electronic device of Figure 35.

[0262] In this embodiment, the electronic device 300 is a smartphone. The electronic device 300 includes the image capturing devices 100, 100f, 100g, and 100h of the eleventh embodiment, as well as a display module 304. As shown in FIG35, the image capturing devices 100, 100f, and 100g are all disposed on the same side of the electronic device 300 and are all single-focus. As shown in FIG36, the image capturing device 100h and the display module 304 are both disposed on the other side of the electronic device 300. The image capturing device 100h can serve as a front-facing camera to provide a selfie function, but this disclosure is not limited thereto. Furthermore, the image capturing devices 100f, 100g, and 100h can all include the photographic optical lens group disclosed herein and can all have a structural configuration similar to that of the image capturing device 100. In detail, each of the image capturing devices 100f, 100g, and 100h may include an imaging lens, a driving device, an electronic photosensitive element, and an image stabilization module. The imaging lens of each of the image capturing devices 100f, 100g, and 100h may include, for example, the photographic optical lens group disclosed herein, a lens barrel for supporting the photographic optical lens group, and a support device.

[0263] Image capturing device 100 is a telephoto image capturing device, image capturing device 100f is a wide-angle image capturing device, image capturing device 100g is an ultra-wide-angle image capturing device, and image capturing device 100h is a wide-angle image capturing device. In this embodiment, image capturing devices 100, 100f, and 100g have different viewing angles, allowing the electronic device 300 to provide different magnifications to achieve optical zoom shooting effects. Specifically, the maximum viewing angle in image capturing device 100 can differ from the maximum viewing angle in image capturing device 100f by more than 30 degrees, and the maximum viewing angle in image capturing device 100g can also differ from the maximum viewing angle in image capturing device 100g by more than 30 degrees. Furthermore, as shown in Figure 36, the opening of image capturing device 100h can be non-circular, and the lens barrel or optical element inside image capturing device 100h can be cut at its outer diameter to have a chamfered edge to accommodate the non-circular opening. This allows for a further reduction in the single-axis length of the image capturing device 100h, which facilitates a reduction in lens volume, increases the area ratio of the display module 304 relative to the electronic device 300, and reduces the thickness of the electronic device 300, further achieving module miniaturization. The aforementioned electronic device 300 is exemplified by including multiple image capturing devices 100, 100f, 100g, and 100h, but the number and configuration of the image capturing devices are not intended to limit this disclosure.

[0264] <Fourteenth Embodiment>

[0265] Please refer to Figure 37, which is a perspective view of one side of an electronic device according to the fourteenth embodiment of this disclosure.

[0266] In this embodiment, the electronic device 400 is a smartphone. The electronic device 400 includes, in the eleventh embodiment, image capturing devices 100i, 100j, 100k, 100m, 100n, 100p, 100q, and 100r, a flash module 401, a focus assist module, an image signal processor, a display module, and an image software processor (not shown). Image capturing devices 100i, 100j, 100k, 100m, 100n, 100p, 100q, and 100r are all located on the same side of the electronic device 400, while the display module is located on the other side of the electronic device 400. Furthermore, the image capturing devices 100i, 100j, 100k, 100m, 100n, 100p, 100q, and 100r can all include the photographic optical lens group disclosed herein and can all have a structural configuration similar to that of the image capturing device 100, which will not be described in detail here.

[0267] Image capturing device 100 is a telescopic image capturing device with a reversible optical path; image capturing device 100i is a wide-angle image capturing device; image capturing device 100j is a telescopic image capturing device with a reversible optical path; image capturing device 100k is a wide-angle image capturing device; image capturing device 100m is an ultra-wide-angle image capturing device; image capturing device 100n is an ultra-wide-angle image capturing device; image capturing device 100p is a telescopic image capturing device; image capturing device 100q is a telescopic image capturing device; and image capturing device 100r is a time-of-flight ranging image capturing device. In this embodiment, image capturing devices 100, 100i, 100j, 100k, 100m, 100n, 100p, and 100q have different viewing angles, allowing the electronic device 400 to provide different magnification ratios to achieve optical zoom shooting effects. Furthermore, the image capturing device 100r can acquire depth information of the image. The maximum viewing angle in image capturing device 100 can differ from that in image capturing device 100i by more than 30 degrees, and the maximum viewing angle in image capturing device 100 can differ from that in image capturing device 100m by more than 30 degrees. The electronic device 400 described above is exemplified by including multiple image capturing devices 100, 100i, 100j, 100k, 100m, 100n, 100p, 100q, and 100r, but the number and configuration of the image capturing devices are not intended to limit this disclosure. When a user takes a picture of the subject, the electronic device 400 uses the image capturing device 100, image capturing device 100i, image capturing device 100j, image capturing device 100k, image capturing device 100m, image capturing device 100n, image capturing device 100p, image capturing device 100q or image capturing device 100r to focus the light and activate the flash module 401 to provide supplementary lighting. The subsequent processing is performed in a manner similar to that described in the previous embodiment, which will not be repeated here.

[0268] The image capturing device disclosed herein is not limited to smartphones. It can also be applied to mobile focusing systems as needed, offering excellent aberration correction and good image quality. For example, the image capturing device can be widely used in 3D image capture, digital cameras, mobile products, digital tablets, smart TVs, network surveillance equipment, dashcams, reversing cameras, multi-lens devices, recognition systems, motion-sensing game consoles, drones, wearable products, and personal video recorders. The aforementioned electronic devices are merely illustrative examples of practical applications of this disclosure and do not limit the scope of application of the image capturing device disclosed herein.

[0269] Although this disclosure is based on the preferred embodiments described above, it is not intended to limit this disclosure. Anyone skilled in the art may make some modifications and refinements without departing from the spirit and scope of this disclosure. Therefore, the scope of patent protection of this disclosure shall be determined by the claims attached to this specification.

[0270] 1,2,3,4,5,6,7,8,9,10,100,100a,100b,100c,100d,100e,100f,100g,100h,100i,100j,100k,100m,100n,100p,100q,100r: imaging device 101: Imaging Lens 102: Drive unit 103: Electronic photosensitive element 104: Image Stabilization Module 200, 300, 400: Electronic devices 201,401: Flash module 202: Focusing Assist Module 203: Image Signal Processor 204, 304: Display module 205: Image Software Processor 206: Subject LX: Long Wheelbase SY: Short axis Ra,Rb: Effective radius OA: Optical Axis ST: Aperture S1, S2: Aperture E1: First optical element E2: Second optical element E3: Third optical element E4: Fourth optical element E5: Fifth optical element E6: Sixth Optical Element E7: Filter element IMG: Imaging Surface IS: Electronic photosensitive element P: Inversion point P1: Reflecting surface OEA: Optical Effective Area CSP: Cutting edge ΣAT: The sum of the distances between all adjacent optical elements on the optical axis in a photographic lens assembly. ΣCT: The total thickness of all optical elements in a photographic lens assembly along the optical axis. BL: Distance along the optical axis from the image-side surface of the sixth optical element to the imaging plane. CT1: Thickness of the first optical element along the optical axis CT2: Thickness of the second optical element along the optical axis CT3: Thickness of the third optical element along the optical axis CT4: Thickness of the fourth optical element along the optical axis CT5: Thickness of the fifth optical element along the optical axis CT6: Thickness of the sixth optical element along the optical axis EPDx: Entrance pupil diameter of the photographic lens group along the major axis of the corresponding aperture. EPDy: The entrance pupil diameter of a photographic lens group along its minor axis corresponding to the aperture. EPDmax: The entrance pupil diameter of a photographic lens group in the direction of the maximum entrance pupil diameter at the corresponding aperture. f: Focal length of the photographic optical lens group f1: Focal length of the first optical element f4: Focal length of the fourth optical element f5: Focal length of the fifth optical element f6: Focal length of the sixth optical element f23: Combined focal length of the second and third optical elements f56: Combined focal length of the fifth and sixth optical elements FOV: The maximum angle of view in a photographic lens assembly. HFOV: Half of the maximum angle of view in a photographic lens assembly. ImgH: Maximum imaging height of the photographic optical lens assembly. N1: Refractive index of the first optical element N2: Refractive index of the second optical element N4: Refractive index of the fourth optical element P1TL: Distance along the optical axis from the reflecting surface of the first optical element to the imaging surface. R1: Radius of curvature of the object-side surface of the first optical element R2: Radius of curvature of the image-side surface of the first optical element R3: Radius of curvature of the object-side surface of the second optical element R7: Radius of curvature of the object-side surface of the fourth optical element R9: Radius of curvature of the object-side surface of the fifth optical element R10: Radius of curvature of the image-side surface of the fifth optical element R12: Radius of curvature of the image-side surface of the sixth optical element SAG1R1: The displacement parallel to the optical axis from the point where the object-side surface of the first optical element intersects the optical axis to the position of the maximum effective radius of the object-side surface of the first optical element. SAG1R2: The displacement parallel to the optical axis from the point where the image-side surface of the first optical element intersects the optical axis to the position of the maximum effective radius of the image-side surface of the first optical element. SAG5R1: The displacement parallel to the optical axis from the point where the object-side surface of the fifth optical element intersects the optical axis to the position of the maximum effective radius of the object-side surface of the fifth optical element. SAG5R2: The displacement parallel to the optical axis from the point where the image-side surface of the fifth optical element intersects the optical axis to the position of the maximum effective radius of the image-side surface of the fifth optical element. SAG6R2: The displacement parallel to the optical axis from the point where the image-side surface of the sixth optical element intersects the optical axis to the position of the maximum effective radius of the image-side surface of the sixth optical element. T23: The distance between the second and third optical elements on the optical axis TL: Distance along the optical axis from the object-side surface of the first optical element to the imaging plane. V5: Abbe number of the fifth optical element V6: Abbe number of the sixth optical element Y1R1: Maximum effective radius of the object-side surface of the first optical element

Claims

1. A photographic optical lens assembly comprising six optical elements, the six optical elements being sequentially arranged from the object side to the image side along a light path as 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, and each of the six optical elements having an object-side surface facing the object side and an image-side surface facing the image side; wherein, The photographic optical lens assembly contains a total of six refractive optical elements. The first optical element has positive refractive power, and its object-side surface is convex near the optical axis. The fourth optical element also has positive refractive power, and its object-side surface is convex near the optical axis. The thickness of the first optical element along the optical axis is CT1, the second optical element is CT2, the third optical element is CT3, the fourth optical element is CT4, the fifth optical element is CT5, and the sixth optical element is CT6. The focal length of the photographic optical lens assembly is f, the focal length of the first optical element is f1, the radius of curvature of the object-side surface of the second optical element is R3, and the radius of curvature of the image-side surface of the sixth optical element is R12. These elements satisfy the following condition: 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 assembly as described in claim 1, wherein the object-side surface of the second optical element is convex near the optical axis, and the image-side surface of the sixth optical element is concave near the optical axis; and wherein, Half of the maximum field of view in this photographic optical lens group is the HFOV, which satisfies the following condition: 8.0 degrees < HFOV < 20.0 degrees.

3. The photographic optical lens assembly as described in claim 1, wherein the sum of the distances between all adjacent optical elements in the photographic optical lens assembly on the optical axis is ΣAT, the distance from the image-side surface of the sixth optical element to an imaging surface on the optical axis is BL, and the sum of the thicknesses of all optical elements in the photographic optical lens assembly on the optical axis is ΣCT, which satisfies the following condition: 0.40 < (ΣAT+BL) / ΣCT < 1.

60.

4. The photographic optical lens assembly as described in claim 1 further includes an aperture, wherein the focal length of the photographic optical lens assembly is f, the combined focal length of the second optical element and the third optical element is f23, and the entrance pupil diameter of the photographic optical lens assembly in the direction corresponding to the maximum entrance pupil diameter of the aperture is EPDmax, which satisfies the following conditions: 1.60 < f / EPDmax < 3.60; and -2.20 < f / f23 < 0.

60.

5. The photographic optical lens assembly as described in claim 1, wherein the focal length of the photographic optical lens assembly is f, and the focal length of the fourth optical element is f4, which satisfies the following condition: 0.03 < f4 / f < 1.

80.

6. The photographic optical lens assembly as described in claim 1, wherein 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, which satisfy the following condition: 0.00 ≤ |R3 / R2| < 0.

30.

7. The photographic optical lens assembly as claimed in claim 1, wherein the radius of curvature of the object-side surface of the first optical element is R1 and the radius of curvature of the object-side surface of the fourth optical element is R7, which satisfies the following condition: 0.00 ≤ |R7 / R1| < 1.

00.

8. The photographic optical lens assembly as claimed in claim 1, wherein 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, which satisfies the following condition: -2.00 < (R7+R9) / (R7-R9) < 0.

30.

9. The photographic optical lens assembly as claimed in claim 1, wherein the Abbe number of the fifth optical element is V5, the Abbe number of the sixth optical element is V6, and the refractive index of the fourth optical element is N4, which satisfies the following conditions: 0.90 < V5 / V6 < 5.00; and 1.450 < N4 < 1.

580.

10. The photographic optical lens assembly as claimed in claim 1, wherein the first optical element is a prism and the first optical element has a reflective surface; and wherein, The first optical element has a refractive index of N1, and its thickness along the optical axis is CT1. The second optical element has a thickness along the optical axis of CT2, the third optical element has a thickness along the optical axis of CT3, the fourth optical element has a thickness along the optical axis of CT4, the fifth optical element has a thickness along the optical axis of CT5, and the sixth optical element has a thickness along the optical axis of CT6, satisfying the following conditions: 1.500 < N1 < 1.600; and 0.55 < (CT2+CT3+CT4+CT5+CT6) / CT1 < 1.

45.

11. The photographic optical lens assembly as described in claim 1, wherein the displacement of the point where the object-side surface of the first optical element intersects the optical axis to the position of the maximum effective radius of the object-side surface of the first optical element parallel to the optical axis is SAG1R1, the displacement of the point where the image-side surface of the first optical element intersects the optical axis to the position of the maximum effective radius of the image-side surface of the first optical element parallel to the optical axis is SAG1R2, and the distance from the position of the maximum effective radius of the object-side surface of the first optical element to the position of the maximum effective radius of the image-side surface of the first optical element parallel to the optical axis is ET1, which satisfies the following condition: -0.10 < (SAG1R1+SAG1R2) / ET1 < 0.

35.

12. An image capturing device comprising: a photographic optical lens assembly as described in claim 1; and an electronic photosensitive element disposed on an imaging surface of the photographic optical lens assembly.

13. An electronic device comprising at least two image-capturing devices, wherein the at least two image-capturing devices are located on the same side of the electronic device, and the at least two image-capturing devices comprise: a first image-capturing device comprising the image-capturing device as described in claim 12; and a second image-capturing device comprising an optical lens assembly and an electronic photosensitive element, wherein the electronic photosensitive element of the second image-capturing device is disposed on an imaging plane of the optical lens assembly; wherein... The maximum viewing angle in the first imaging device differs from the maximum viewing angle in the second imaging device by more than 30 degrees.

14. A photographic optical lens assembly comprising six optical elements, the six optical elements being sequentially arranged from the object side to the image side along a light path as 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, and each of the six optical elements having an object-side surface facing the object side and an image-side surface facing the image side; wherein, The photographic optical lens assembly contains a total of six refractive optical elements. The first optical element has positive refractive power, and its object-side surface is convex near the optical axis. The fourth optical element also has positive refractive power, and its object-side surface is convex near the optical axis. The thickness of the first optical element along the optical axis is CT1, the second optical element is CT2, the third optical element is CT3, the fourth optical element is CT4, the fifth optical element is CT5, and the sixth optical element is CT6. The focal length of the photographic optical lens assembly is f, the focal length of the first optical element is f1, and the combined focal length of the fifth and sixth optical elements is f56. 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 fourth optical element is R7. All of these satisfy the following condition: 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 photographic optical lens assembly as claimed in claim 14, wherein the object-side surface of the second optical element is convex near the optical axis, and the image-side surface of the sixth optical element is concave near the optical axis.

16. The photographic optical lens assembly as claimed in claim 14, wherein 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, which satisfies the following condition: 0.01 < (|R7|+|R9|) / |R2| < 2.

00.

17. The photographic optical lens assembly as claimed in claim 14, wherein the radius of curvature of the object-side surface of the fourth optical element is R7, the radius of curvature of the image-side surface of the sixth optical element is R12, the maximum effective radius of the object-side surface of the first optical element is Y1R1, and the maximum imaging height of the photographic optical lens assembly is ImgH, which satisfies the following conditions: 1.60 < R12 / R7 < 8.00; and 0.80 < Y1R1 / ImgH < 1.

60.

18. The photographic optical lens assembly as described in claim 14, wherein the thickness of the first optical element on the optical axis is CT1 and the thickness of the third optical element on the optical axis is CT3, which satisfies the following condition: 0.10 < 10 × CT3 / CT1 < 3.

00.

19. The photographic optical lens assembly as described in claim 14 further includes an aperture, wherein the thickness of the third optical element on the optical axis is CT3, the focal length of the photographic optical lens assembly is f, and the entrance pupil diameter of the photographic optical lens assembly in the direction corresponding to the maximum entrance pupil diameter of the aperture is EPDmax, which satisfies the following conditions: 0.15 < 10×CT3 / f < 0.60; and 1.80 < f / EPDmax < 3.

30.

20. The photographic optical lens assembly as claimed in claim 14, wherein the refractive index of the second optical element is N2, 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 fourth optical element is R7, which satisfy the following conditions: 1.420 < N2 < 1.620; and 0.01 < |R7 / R2| < 0.

40.

21. The photographic optical lens assembly as described in claim 14, wherein the focal length of the photographic optical lens assembly is f, and the focal length of the fourth optical element is f4, which satisfies the following condition: 0.06 < f4 / f < 1.

10.

22. The photographic optical lens assembly as claimed in claim 14, wherein at least one of the six optical elements has at least one inflection point; and wherein, The sum of the distances between all adjacent optical elements in the photographic optical lens group on the optical axis is ΣAT, the distance from the image-side surface of the sixth optical element to an imaging surface on the optical axis is BL, and the sum of the thicknesses of all optical elements in the photographic optical lens group on the optical axis is ΣCT, which satisfies the following condition: 0.50 < (ΣAT+BL) / ΣCT < 1.

40.

23. The photographic optical lens assembly as described in claim 14, wherein the focal length of the photographic optical lens assembly is f, the focal length of the fifth optical element is f5, and the focal length of the sixth optical element is f6, satisfying the following condition: -2.50 < f / f5 + f / f6 < -0.

80.

24. The photographic optical lens assembly as claimed in claim 14, wherein 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, satisfying the following condition: -0.25 < R10 / f6 < 10.

00.

25. The photographic optical lens assembly as claimed in claim 14, wherein the distance between the second optical element and the third optical element on the optical axis is T23, and the thickness of the second optical element on the optical axis is CT2, which satisfies the following condition: 0.10 < T23 / CT2 < 0.

80.

26. The photographic optical lens assembly as claimed in claim 14, wherein the first optical element has a reflective surface; and wherein, The distance from the reflecting surface of the first optical element to the imaging surface on the optical axis is P1TL, the distance from the object-side surface of the first optical element to the imaging surface on the optical axis is TL, the displacement of the point where the object-side surface of the fifth optical element intersects on the optical axis to the position of the maximum effective radius of the object-side surface of the fifth optical element parallel to the optical axis is SAG5R1, the displacement of the point where the image-side surface of the fifth optical element intersects on the optical axis to the position of the maximum effective radius of the image-side surface of the fifth optical element parallel to the optical axis is SAG5R2, and the thickness of the fifth optical element on the optical axis is CT5, which satisfies the following conditions: 0.70 < P1TL / TL < 0.95; and -1.10 < (SAG5R1+SAG5R2) / CT5 < 0.

80.

27. The photographic optical lens assembly as described in claim 14, wherein the displacement of the point where the image-side surface of the sixth optical element intersects the optical axis to the position of the maximum effective radius of the image-side surface of the sixth optical element parallel to the optical axis is SAG6R2, and the thickness of the sixth optical element on the optical axis is CT6, which satisfies the following condition: -0.50 < SAG6R2 / CT6 < 0.

80.

28. A photographic optical lens assembly as described in claim 14, wherein the thickness of the first optical element along the optical axis is CT1, the thickness of the second optical element along the optical axis is CT2, the thickness of the third optical element along the optical axis is CT3, the thickness of the fourth optical element along the optical axis is CT4, the thickness of the fifth optical element along the optical axis is CT5, the thickness of the sixth optical element along the optical axis is CT6, the focal length of the photographic optical lens assembly is f, the focal length of the first optical element is f1, the combined focal length of the fifth and sixth optical elements is f56, 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 second optical element is R3, the radius of curvature of the object-side surface of the fourth optical element is R7, and the radius of curvature of the image-side surface of the sixth optical element is R12, which satisfies the following conditions: 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.

Images