Optical photographing lens assembly, image capturing device and electronic device

Abstract

An optical photographing lens assembly, an image capturing device and an electronic device, the optical photographing lens assembly comprising two lens groups, the two lens groups comprising six lenses. The two lens groups are sequentially a first lens group and a second lens group from the object side to the image side of an optical path. The six lenses are a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens from the object side to the image side of an optical path. Each lens has an object-side surface facing the object side and an image-side surface facing the image side. When specific conditions are met, stray light is prevented from being generated, and the imaging quality is improved.

Description

Technical Field

[0001] The present disclosure relates to an optical imaging lens group and an imaging device, and particularly to a miniaturized optical imaging lens group and an imaging device applied to an electronic device. Background Art

[0002] With the continuous improvement of semiconductor process technology, the performance of electronic photosensitive elements has been enhanced, and pixels can reach a smaller size. Therefore, optical lenses with high imaging quality have become an indispensable part. With the rapid development of technology, the application scope of electronic devices equipped with optical lenses is more extensive, and the requirements for optical lenses are also more diverse. Since it is difficult for conventional optical lenses to balance the requirements of imaging quality, sensitivity, aperture size, volume, or viewing angle, the present invention provides an optical lens with high imaging quality to meet the needs. Summary of the Invention

[0003] The optical imaging lens group, imaging device, and electronic device provided by the present disclosure balance volume, object distance range for moving focus, image quality, and ease of assembly by arranging lenses in groups.

[0004] According to the present disclosure, an optical imaging lens group includes six lenses in sequence from the object side to the image side of an optical path. The six lenses are a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens from the object side to the image side. Each lens has an object-side surface facing the object side and an image-side surface facing the image side. The first lens has a positive refractive power, and the object-side surface near the optical axis is convex. The second lens has a negative refractive power, the object-side surface near the optical axis is convex, and the image-side surface near the optical axis is concave. The third lens has a positive refractive power, and the image-side surface near the optical axis is convex. At least one of the first lens to the sixth lens includes at least one inflection point. The maximum viewing angle of the optical imaging lens group at an infinite object distance is FOVL, the focal length of the second lens is f2, the focal length of the third lens is f3, the focal length of the sixth lens is f6, the thickness of the second lens on the optical axis is CT2, the thickness of the third lens on the optical axis is CT3, the thickness of the fourth lens on the optical axis is CT4, the thickness of the fifth lens on the optical axis is CT5, the distance between the fifth lens and the sixth lens on the optical axis of the optical imaging lens group at an infinite object distance is T56L, the radius of curvature of the object-side surface of the second lens is R3, and the radius of curvature of the image-side surface of the second lens is R4, which satisfy the following conditions: 10.0 < FOVL < 55.0; 0 < |f3 / f6| < 0.75; 0 < (CT4 + CT5) / T56L < 0.90; 4.50 < |f2 / R3| + |f2 / R4| < 18.00; and 0.05 < CT2 / CT3 < 0.75.

[0005] According to the present disclosure, an imaging device is provided, which includes an optical photographing lens group as described in the previous paragraph and an electronic photosensitive element, wherein the electronic photosensitive element is disposed on an imaging surface of the optical photographing lens group.

[0006] According to the present disclosure, an electronic device is further provided, which includes the imaging device as described in the previous paragraph.

[0007] According to the present disclosure, an optical photographing lens group is provided, which sequentially includes six lenses from the object side to the image side of an optical path, and the six lenses are a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens from the object side to the image side. Each lens has an object side surface facing the object side and an image side surface facing the image side. The first lens has a positive refractive power, and its object side surface is convex near the optical axis. The second lens has a negative refractive power, its object side surface is convex near the optical axis, and its image side surface is concave near the optical axis. The third lens has a positive refractive power, and its image side surface is convex near the optical axis. At least one of the first lens to the sixth lens includes at least one inflection point. The maximum viewing angle of the optical photographing lens group at an infinite object distance is FOVL, the focal length of the third lens is f3, the focal length of the sixth lens is f6, the thickness of the fourth lens on the optical axis is CT4, the thickness of the fifth lens on the optical axis is CT5, the distance between the second lens and the third lens on the optical axis of the optical photographing lens group at an infinite object distance is T23L, the distance between the fifth lens and the sixth lens on the optical axis of the optical photographing lens group at an infinite object distance is T56L, the radius of curvature of the image side surface of the first lens is R2, and the radius of curvature of the object side surface of the second lens is R3, and the following conditions are satisfied: 10.0 < FOVL < 55.0; 0 < |f3 / f6| < 0.75; 0 < (CT4 + CT5) / T56L < 0.90; 0.15 < (R2 + R3) / (R2 - R3) < 5.00; and 0.05 < CT4 / T23L < 0.75.

[0008] According to the present disclosure, an optical photographic lens group is provided, which includes two lens groups. The two lens groups include six lenses. The two lens groups are, in order from the object side to the image side of an optical path, a first lens group and a second lens group. The six lenses are, from the object side to the image side of the optical path, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. Each lens has an object-side surface facing the object side and an image-side surface facing the image side. When an object moves from infinity to a micro object distance, the optical photographic lens group changes from a first state to a second state; during the moving focusing process, with respect to the first lens group, the second lens group moves toward the image side along an optical axis direction; during the moving focusing process, there is no relative movement between the lenses in each lens group. The first lens group includes the first lens, the second lens, and the third lens; the second lens group includes the fourth lens, the fifth lens, and the sixth lens. The first lens has a positive refractive power. At least one of the first lens to the sixth lens includes at least one inflection point. The thickness of the first lens on the optical axis is CT1, the thickness of the third lens on the optical axis is CT3, the thickness of the fourth lens on the optical axis is CT4, the thickness of the fifth lens on the optical axis is CT5, the distance between the fifth lens and the sixth lens on the optical axis of the optical photographic lens group at an infinite object distance is T56L, the distance from the object-side surface of the first lens of the optical photographic lens group at an infinite object distance to an imaging surface on the optical axis is TLL, the distance from the object-side surface of the first lens of the optical photographic lens group at an infinite object distance to the image-side surface of the third lens on the optical axis is Dr1r6L, and the distance from the object-side surface of the first lens of the optical photographic lens group at a micro object distance to the imaging surface on the optical axis is TLS, which satisfy the following conditions: 0.10 < (CT4 + CT5) / T56L < 1.50; 0.10 < CT1 / CT3 < 1.80; 1.00 < TLL / Dr1r6L < 3.00; and 0.90 < TLL / TLS < 1.10.

[0009] When FOVL satisfies the above conditions, the optical photographic lens group can have an appropriate viewing angle to cooperate with telescopic applications.

[0010] When |f3 / f6| satisfies the above conditions, the refractive power ratio of the third lens and the sixth lens can be adjusted. By the ability of the third lens to converge light and balanced by the sixth lens, it helps to balance the convergence or divergence of light and improve the light-gathering quality of the entire field of view.

[0011] When (CT4 + CT5) / T56L satisfies the above conditions, due to the relatively large distance between the fifth lens and the sixth lens, it helps to balance the incident angle of light on the imaging surface during the moving focusing process and avoid the generation of stray light.

[0012] When |f2 / R3| + |f2 / R4| satisfies the above conditions, the refractive power of the second lens, the radius of curvature of the object-side surface of the second lens, and the radius of curvature of the image-side surface of the second lens can be adjusted, effectively balancing the deflection angle of the light rays of the first lens and reducing aberration.

[0013] When CT2 / CT3 satisfies the above conditions, the central thickness of the second lens and the ratio of the central thickness of the third lens can be controlled, which helps to take into account the process limitations of the third lens and reduce the volume of the optical photography lens group by adjusting the central thickness of the second lens.

[0014] When (R2 + R3) / (R2 - R3) satisfies the above conditions, the radius of curvature of the image-side surface of the first lens and the radius of curvature of the object-side surface of the second lens can be effectively balanced, adjusting the traveling direction of the peripheral light rays, which helps to correct the astigmatism of the optical photography lens group and reduce the stray light inside the optical photography lens group.

[0015] When CT4 / T23L satisfies the above conditions, the distance between the second lens and the third lens on the optical axis and the central thickness of the fourth lens can be balanced, which helps to balance the spatial configuration of the object-side end lens group and the image-side end lens group and maintain high light-gathering quality during multi-segment object distance shooting.

[0016] When CT1 / CT3 satisfies the above conditions, the central thickness of the first lens and the ratio of the central thickness of the third lens can be controlled, which helps to increase the design freedom and reduce the manufacturing tolerance.

[0017] When TLL / Dr1r6L satisfies the above conditions, the ratio of the total length of the optical photography lens group to the length of the first lens group can be maintained, which helps to compress the volume of the optical photography lens group.

[0018] When TLL / TLS satisfies the above conditions, the same total optical length is maintained during the moving focusing process, which helps to simplify the complexity of the mechanism design, facilitate the assembly of the optical photography lens group, and improve the yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1A A schematic diagram showing an imaging device according to a first embodiment of the present disclosure in a first state;

[0020] Figure 1B Showing according to Figure 1A A schematic diagram of the imaging device according to the first embodiment in a second state;

[0021] Figure 2A From left to right in sequence are Figure 1A The spherical aberration, astigmatism, and distortion curves of the first embodiment;

[0022] Figure 2B From left to right in sequence are Figure 1BSpherical aberration, astigmatism, and distortion curve graphs of the first embodiment;

[0023] Figure 3A Schematic diagram showing an imaging device according to the second embodiment of the present disclosure in a first state;

[0024] Figure 3B Showing according to Figure 3A Schematic diagram showing the imaging device of the second embodiment in a second state;

[0025] Figure 4A From left to right in sequence are Figure 3A Spherical aberration, astigmatism, and distortion curve graphs of the second embodiment;

[0026] Figure 4B From left to right in sequence are Figure 3B Spherical aberration, astigmatism, and distortion curve graphs of the second embodiment;

[0027] Figure 5A Schematic diagram showing an imaging device according to the third embodiment of the present disclosure in a first state;

[0028] Figure 5B Showing according to Figure 5A Schematic diagram showing the imaging device of the third embodiment in a second state;

[0029] Figure 6A From left to right in sequence are Figure 5A Spherical aberration, astigmatism, and distortion curve graphs of the third embodiment;

[0030] Figure 6B From left to right in sequence are Figure 5B Spherical aberration, astigmatism, and distortion curve graphs of the third embodiment;

[0031] Figure 7A Schematic diagram showing an imaging device according to the fourth embodiment of the present disclosure in a first state;

[0032] Figure 7B Showing according to Figure 7A Schematic diagram showing the imaging device of the fourth embodiment in a second state;

[0033] Figure 8A From left to right in sequence are Figure 7A Spherical aberration, astigmatism, and distortion curve graphs of the fourth embodiment;

[0034] Figure 8B From left to right in sequence are Figure 7B Spherical aberration, astigmatism, and distortion curve graphs of the fourth embodiment;

[0035] Figure 9A Schematic diagram showing an imaging device according to the fifth embodiment of the present disclosure in a first state;

[0036] Figure 9B Shows a schematic diagram of the imaging device according to Figure 9A the fifth embodiment in the second state;

[0037] Figure 10A From left to right in sequence are Figure 9A the spherical aberration, astigmatism and distortion curves of the fifth embodiment;

[0038] Figure 10B From left to right in sequence are Figure 9B the spherical aberration, astigmatism and distortion curves of the fifth embodiment;

[0039] Figure 11A Shows a schematic diagram of an imaging device according to the sixth embodiment of the present disclosure in the first state;

[0040] Figure 11B Shows a schematic diagram of an imaging device according to Figure 11A the sixth embodiment in the second state;

[0041] Figure 12A From left to right in sequence are Figure 11A the spherical aberration, astigmatism and distortion curves of the sixth embodiment;

[0042] Figure 12B From left to right in sequence are Figure 11B the spherical aberration, astigmatism and distortion curves of the sixth embodiment;

[0043] Figure 13A Shows a schematic diagram of an imaging device according to the seventh embodiment of the present disclosure in the first state;

[0044] Figure 13B Shows a schematic diagram of an imaging device according to Figure 13A the seventh embodiment in the second state;

[0045] Figure 14A From left to right in sequence are Figure 13A the spherical aberration, astigmatism and distortion curves of the seventh embodiment;

[0046] Figure 14B From left to right in sequence are Figure 13B the spherical aberration, astigmatism and distortion curves of the seventh embodiment;

[0047] Figure 15A Shows a schematic diagram of an imaging device according to the eighth embodiment of the present disclosure in the first state;

[0048] Figure 15B Shows a schematic diagram of an imaging device according to Figure 15A the eighth embodiment in the second state;

[0049] Figure 16AFrom left to right in sequence are Figure 15A The spherical aberration, astigmatism and distortion curve graphs of the eighth embodiment;

[0050] Figure 16B From left to right in sequence are Figure 15B The spherical aberration, astigmatism and distortion curve graphs of the eighth embodiment;

[0051] Figure 17A The schematic diagram showing an imaging device according to the ninth embodiment of the present disclosure in the first state;

[0052] Figure 17B Showing in accordance with Figure 17A The schematic diagram of the imaging device according to the ninth embodiment in the second state;

[0053] Figure 18A From left to right in sequence are Figure 17A The spherical aberration, astigmatism and distortion curve graphs of the ninth embodiment;

[0054] Figure 18B From left to right in sequence are Figure 17B The spherical aberration, astigmatism and distortion curve graphs of the ninth embodiment;

[0055] Figure 19A The schematic diagram showing an imaging device according to the tenth embodiment of the present disclosure in the first state;

[0056] Figure 19B Showing in accordance with Figure 19A The schematic diagram of the imaging device according to the tenth embodiment in the second state;

[0057] Figure 20A From left to right in sequence are Figure 19A The spherical aberration, astigmatism and distortion curve graphs of the tenth embodiment;

[0058] Figure 20B From left to right in sequence are Figure 19B The spherical aberration, astigmatism and distortion curve graphs of the tenth embodiment;

[0059] Figure 21A Showing in accordance with Figure 1A The schematic diagram of the inflection points and critical points of each lens of the optical photography lens group in the first state according to the first embodiment;

[0060] Figure 21B Showing in accordance with Figure 1A The schematic diagram of some parameters of the optical photography lens group in the first state according to the first embodiment;

[0061] Figure 22A The schematic diagram showing an imaging device according to the first embodiment of the present disclosure with different types of reflection elements configured in the first state;

[0062] Figure 22B Schematic diagram showing different types of reflecting elements of an imaging device according to the first embodiment of the present disclosure in the second state;

[0063] Figure 23A Showing according to Figure 1A Schematic diagram of any one of the diaphragms in a non-circular form in the first embodiment;

[0064] Figure 23B Showing according to Figure 1A Schematic diagram of any one of the diaphragms in another non-circular form in the first embodiment;

[0065] Figure 24 Stereoscopic schematic diagram of an imaging device according to the eleventh embodiment of the present disclosure;

[0066] Figure 25A Schematic diagram of one side of an electronic device according to the twelfth embodiment of the present disclosure;

[0067] Figure 25B Showing according to Figure 25A Schematic diagram of the other side of the electronic device in ;

[0068] Figure 25C Showing according to Figure 25A System schematic diagram of the electronic device in ;

[0069] Figure 26 Schematic diagram of one side of an electronic device according to the thirteenth embodiment of the present disclosure;

[0070] Figure 27 Schematic diagram of one side of an electronic device according to the fourteenth embodiment of the present disclosure;

[0071] Figure 28A Schematic diagram of one side of an electronic device according to the fifteenth embodiment of the present disclosure;

[0072] Figure 28B Showing according to Figure 28A Schematic diagram of the other side of the electronic device in ;

[0073] Figure 29A Schematic diagram showing a reflecting element of a type according to the present disclosure disposed between an object to be photographed and a lens group of an optical photographing lens group;

[0074] Figure 29B Schematic diagram showing a reflecting element of another type according to the present disclosure disposed between an object to be photographed and a lens group of an optical photographing lens group;

[0075] Figure 29CSchematic diagram showing another type of reflection element according to the present disclosure disposed between the object to be photographed and the lens group of the optical photographing lens group;

[0076] Figure 30A Schematic diagram showing two reflection elements of one type according to the present disclosure in the optical photographing lens group;

[0077] Figure 30B Schematic diagram showing two reflection elements of another type according to the present disclosure in the optical photographing lens group;

[0078] Figure 31A Schematic diagram showing another type of reflection element according to the present disclosure in the optical photographing lens group;

[0079] Figure 31B Schematic diagram showing another type of reflection element according to the present disclosure in the optical photographing lens group;

[0080] Figure 31C Schematic diagram showing another type of reflection element according to the present disclosure in the optical photographing lens group;

[0081] Figure 32A Schematic diagram showing another type of reflection element according to the present disclosure in the optical photographing lens group; and

[0082] Figure 32B Schematic diagram showing another type of reflection element according to the present disclosure in the optical photographing lens group.

[0083]

Symbol Description

[0084] 200, 300, 400, 500: Electronic device

[0085] 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 100, 110, 120, 130, 140, 310, 320, 330, 410, 420, 430, 440, 450, 460, 470, 480, 490, 510, 520, 530, 540: Imaging device

[0086] 101: Imaging lens

[0087] 102: Driving device group

[0088] 103: Electronic photosensitive element

[0089] 104: Image stabilization module

[0090] 201, 301, 401: Flashlight module

[0091] 202: Focus assist module

[0092] 203: Image signal processor

[0093] 204,504: User interface

[0094] 205: Image software processor

[0095] 206: Object

[0096] S1,S2,S3,S4,S5: Diaphragm

[0097] E1: First lens

[0098] E2: Second lens

[0099] E3: Third lens

[0100] E4: Fourth lens

[0101] E5: Fifth lens

[0102] E6: Sixth lens

[0103] E7,IR: Filter element

[0104] E8: Reflective element

[0105] IMG: Imaging surface

[0106] IS: Electronic photosensitive element

[0107] IP: Inflection point

[0108] CP: Critical point

[0109] OA1: First optical axis

[0110] OA2: Second optical axis

[0111] OA3: Third optical axis

[0112] LF,LF1,LF2: Optical path turning element

[0113] LG: Lens group

[0114] X,Y: Direction

[0115] RX: Effective major axis radius

[0116] RY: Effective minor axis radius

[0117] Sag3R1L: Displacement of the intersection point of the third lens object side surface of the optical photographic lens group on the optical axis at an infinite object distance to the position of the maximum effective radius of the third lens object side surface parallel to the optical axis

[0118] Sag6R2L: The displacement parallel to the optical axis from the intersection point on the optical axis of the image-side surface of the sixth lens of the optical photographic lens group at an infinite object distance to the position of the maximum effective radius of the image-side surface of the sixth lens

[0119] Y1R1L: The position of the maximum effective radius of the object-side surface of the first lens of the optical photographic lens group at an infinite object distance

[0120] Y6R2L: The position of the maximum effective radius of the image-side surface of the sixth lens of the optical photographic lens group at an infinite object distance Detailed implementation manner

[0121] The present disclosure provides an optical photographic lens group, which includes two lens groups, and the two lens groups include six lenses. The two lens groups are sequentially the first lens group and the second lens group from the object side to the image side of an optical path. The six lenses are the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens from the object side to the image side of the optical path. Each lens has an object-side surface facing the object side and an image-side surface facing the image side. Therefore, through the configuration of the two lens groups, a balance can be achieved among volume, focusing by moving within the object distance range, image quality, and assembly difficulty. Specifically, the present disclosure designs the lenses in groups, adjusts the focal length of the optical photographic lens group according to the distance of the photographed object by changing the distance between the lens groups, and completes focusing. In addition, a reflection element can be used to provide different optical path directions for the optical photographic lens group, giving the optical photographic lens group a more flexible use space to show the telephoto effect of a long focal length, achieving high imaging quality both when shooting distant and close scenes, and helping to improve the shooting freedom of the lens.

[0122] When the object to be photographed moves from infinity to a micro object distance, the optical photographic lens group changes from the first state to the second state. During the moving focusing process, relative to the first lens group, the second lens group can move toward the image side along an optical axis direction. Thereby, it helps to achieve the effect of close shooting and simplifies the complexity of the optical design and mechanism.

[0123] During the moving focusing process, there is no relative movement between the lenses in each lens group. Thereby, the complexity of the mechanism can be simplified.

[0124] In the optical photographic lens group, the first lens has a positive refractive power, and its refractive power can be adjusted to converge the light rays, which helps to control the shooting angle and increase the light input amount at the same time. The object-side surface of the first lens near the optical axis can be a convex surface, and the surface shape of the first lens can be adjusted, which helps to compress the outer diameter of the object-side end of the optical photographic lens group.

[0125] The second lens may have a negative refractive power, which can effectively balance the refractive power intensity of the first lens to avoid excessive aberration caused by too large an angle of light deflection. The surface of the object side of the second lens near the optical axis may be convex, which can adjust the traveling direction of light and help converge the light. The surface of the image side of the second lens near the optical axis may be concave, which can adjust the refractive power of the second lens and help balance the spherical aberration of the optical imaging lens group.

[0126] The third lens may have a positive refractive power, which helps converge the light, effectively controls the light path direction, and achieves a balance between the viewing angle and the volume distribution. The surface of the image side of the third lens near the optical axis may be convex, which can adjust the outgoing direction of light from the third lens and help increase the imaging surface.

[0127] The surface of the object side of the fourth lens near the optical axis may be concave, which can control the incident angle of light on the object side surface of the fourth lens and avoid excessive divergence of light and poor relative illumination at the periphery caused by too large an incident angle.

[0128] The surface of the object side of the fifth lens near the optical axis may be convex, which can balance the refractive power of the fifth lens and reduce the back focal length.

[0129] The sixth lens may have a negative refractive power, which can balance the refractive power at the image side end of the optical imaging lens group, improve the light condensing quality of light in each field of view on the imaging surface, and reduce aberration. The surface of the image side of the sixth lens near the optical axis may be convex, which can assist in balancing the back focal length of the optical imaging lens group and correcting off-axis aberration at the same time.

[0130] At least one of the first lens to the sixth lens may include at least one inflection point. Thereby, the degree of freedom of optical design can be increased to facilitate astigmatism correction.

[0131] At least one of the object side surface and the image side surface of the fourth lens may include at least one critical point. Thereby, the peripheral surface shape design of the fourth lens can be adjusted to facilitate astigmatism correction and increase the imaging surface. In addition, the object side surface of the fourth lens may include at least one convex critical point. Thereby, the peripheral light angle of the object side of the fourth lens can be controlled to avoid vignetting at the periphery of the image and slow down distortion.

[0132] The thickness of the fourth lens on the optical axis is CT4, the thickness of the fifth lens on the optical axis is CT5, and the distance between the fifth lens and the sixth lens on the optical axis of the optical photographic lens group at an infinite object distance is T56L, which satisfies the following conditions: 0 < (CT4 + CT5) / T56L < 0.90; or 0.10 < (CT4 + CT5) / T56L < 1.50. Thereby, by having a relatively large distance between the fifth lens and the sixth lens, it helps to balance the incident angle of light on the imaging surface during the moving focusing process and avoid the generation of stray light. Furthermore, it can satisfy the following conditions: 0.15 < (CT4 + CT5) / T56L < 0.75. Furthermore, it can satisfy the following conditions: 0.28 ≤ (CT4 + CT5) / T56L ≤ 0.63.

[0133] The maximum viewing angle of the optical photographic lens group at an infinite object distance is FOVL, which satisfies the following conditions: 10.0 < FOVL < 55.0. Thereby, the optical photographic lens group can have an appropriate viewing angle to cooperate with telescopic applications. Furthermore, it can satisfy the following conditions: 20.0 < FOVL < 45.0. Furthermore, it can satisfy the following conditions: 25.0 < FOVL < 40.0. Furthermore, it can satisfy the following conditions: 33.6 ≤ FOVL ≤ 35.6.

[0134] The focal length of the third lens is f3, and the focal length of the sixth lens is f6, which satisfies the following conditions: 0 < |f3 / f6| < 0.75. Thereby, the refractive power ratio between the third lens and the sixth lens can be adjusted. By having the third lens with the ability to converge light and balanced by the sixth lens, it helps to balance the convergence or divergence of light and improve the light-gathering quality of the entire field of view. Furthermore, it can satisfy the following conditions: 0.03 < |f3 / f6| < 0.65. Furthermore, it can satisfy the following conditions: 0.08 ≤ |f3 / f6| ≤ 0.60.

[0135] The focal length of the second lens is f2, the radius of curvature of the object-side surface of the second lens is R3, and the radius of curvature of the image-side surface of the second lens is R4, which satisfies the following conditions: 4.50 < |f2 / R3| + |f2 / R4| < 18.00. Thereby, the refractive power of the second lens, the radius of curvature of the object-side surface of the second lens, and the radius of curvature of the image-side surface of the second lens can be adjusted, which can effectively balance the deflection angle of the light of the first lens and reduce aberration. Furthermore, it can satisfy the following conditions: 6.00 < |f2 / R3| + |f2 / R4| < 15.00. Furthermore, it can satisfy the following conditions: 6.09 ≤ |f2 / R3| + |f2 / R4| ≤ 12.09.

[0136] The thickness of the second lens on the optical axis is CT2, and the thickness of the third lens on the optical axis is CT3, which satisfy the following conditions: 0.05 < CT2 / CT3 < 0.75. Thereby, the ratio of the central thickness of the second lens and the central thickness of the third lens can be controlled, which helps to take into account the process limitations of the third lens and reduce the volume of the optical photographic lens group by adjusting the central thickness of the second lens. Furthermore, it can satisfy the following conditions: 0.12 < CT2 / CT3 < 0.65. Furthermore, it can satisfy the following conditions: 0.19 ≤ CT2 / CT3 ≤ 0.53.

[0137] The radius of curvature of the image-side surface of the first lens is R2, and the radius of curvature of the object-side surface of the second lens is R3, which satisfy the following conditions: 0.15 < (R2 + R3) / (R2 - R3) < 5.00. Thereby, the radius of curvature of the image-side surface of the first lens and the radius of curvature of the object-side surface of the second lens can be effectively balanced, and the traveling direction of peripheral light can be adjusted, which helps to correct the astigmatism of the optical photographic lens group and reduce the stray light within the optical photographic lens group. Furthermore, it can satisfy the following conditions: 0.20 < (R2 + R3) / (R2 - R3) < 3.00. Furthermore, it can satisfy the following conditions: 0.25 < (R2 + R3) / (R2 - R3) < 2.50. Furthermore, it can satisfy the following conditions: 0.30 < (R2 + R3) / (R2 - R3) < 2.00. Furthermore, it can satisfy the following conditions: 0.40 ≤ (R2 + R3) / (R2 - R3) ≤ 1.83.

[0138] The thickness of the fourth lens on the optical axis is CT4, and the distance between the second lens and the third lens on the optical axis at an infinite object distance of the optical photographic lens group is T23L, which satisfy the following conditions: 0.05 < CT4 / T23L < 0.75. Thereby, the distance between the second lens and the third lens on the optical axis and the central thickness of the fourth lens can be balanced, which helps to balance the spatial configuration of the object-side end lens group and the image-side end lens group and maintain high light-gathering quality during multi-distance shooting. Furthermore, it can satisfy the following conditions: 0.12 < CT4 / T23L < 0.65. Furthermore, it can satisfy the following conditions: 0.17 ≤ CT4 / T23L ≤ 0.59.

[0139] The thickness of the first lens on the optical axis is CT1, and the thickness of the third lens on the optical axis is CT3, which satisfy the following conditions: 0.10 < CT1 / CT3 < 1.80. Thereby, the ratio of the central thickness of the first lens and the central thickness of the third lens can be controlled, which helps to increase the design freedom and reduce the manufacturing tolerance. Furthermore, it can satisfy the following conditions: 0.10 < CT1 / CT3 < 1.20. Furthermore, it can satisfy the following conditions: 0.20 < CT1 / CT3 < 1.40. Furthermore, it can satisfy the following conditions: 0.30 < CT1 / CT3 < 1.00. Furthermore, it can satisfy the following conditions: 0.55 ≤ CT1 / CT3 ≤ 0.90.

[0140] The distance from the object-side surface of the first lens of the optical photographic lens group at an infinite object distance to the imaging surface on the optical axis is TLL, and the distance from the object-side surface of the first lens of the optical photographic lens group at an infinite object distance to the image-side surface of the third lens on the optical axis is Dr1r6L, which satisfies the following conditions: 1.00 < TLL / Dr1r6L < 3.50. Thereby, the ratio of the total length of the optical photographic lens group to the length of the first lens group can be maintained, which helps to compress the volume of the optical photographic lens group. Furthermore, it can satisfy the following conditions: 1.00 < TLL / Dr1r6L < 3.00. Furthermore, it can satisfy the following conditions: 1.50 < TLL / Dr1r6L < 3.00. Furthermore, it can satisfy the following conditions: 1.80 < TLL / Dr1r6L < 2.50. Furthermore, it can satisfy the following conditions: 2.15 ≤ TLL / Dr1r6L ≤ 2.30.

[0141] The distance from the object-side surface of the first lens of the optical photographic lens group at an infinite object distance to the imaging surface on the optical axis is TLL, and the distance from the object-side surface of the first lens of the optical photographic lens group at a micro object distance to the imaging surface on the optical axis is TLS, which satisfies the following conditions: 0.90 < TLL / TLS < 1.10. Thereby, maintaining the same total optical length during the moving focusing process helps to simplify the complexity of the mechanism design, which is beneficial to the assembly of the optical photographic lens group and improves the yield. Furthermore, it can satisfy the following conditions: 0.95 < TLL / TLS < 1.05. Furthermore, it can satisfy the following conditions: 0.98 < TLL / TLS < 1.02. Furthermore, it can satisfy the following conditions: TLL / TLS = 1.00.

[0142] The distance from the object-side surface of the first lens of the optical photographic lens group at an infinite object distance to the image-side surface of the third lens on the optical axis is Dr1r6L, and the distance from the object-side surface of the fourth lens of the optical photographic lens group at an infinite object distance to the image-side surface of the sixth lens on the optical axis is Dr7r12L, which satisfies the following conditions: 1.00 < Dr1r6L / Dr7r12L < 2.00. Thereby, the length of the object-side end lens group on the optical axis and the length of the moving lens group on the optical axis can be adjusted, which helps to balance the spatial configuration of the lenses and reduce the sensitivity of the optical photographic lens group during the moving focusing process. Furthermore, it can satisfy the following conditions: 1.20 < Dr1r6L / Dr7r12L < 1.80.

[0143] At least one of the first lens to the sixth lens can be made of glass material. Thereby, using glass material can effectively reduce the sensitivity to environmental factors and is suitable for various environments with high stability. Furthermore, at least one of the first lens to the third lens can be made of glass material.

[0144] The radius of curvature of the object-side surface of the second lens is R3, and the radius of curvature of the image-side surface of the second lens is R4, which satisfy the following condition: 0 < (R3 - R4) / (R3 + R4) < 0.50. Thereby, the radius of curvature of the object-side surface of the second lens and the radius of curvature of the image-side surface of the second lens can be effectively balanced, which helps to compress the outer diameter of the first lens group. Furthermore, it can satisfy the following condition: 0.10 < (R3 - R4) / (R3 + R4) < 0.35.

[0145] The radius of curvature of the object-side surface of the first lens is R1, and the radius of curvature of the image-side surface of the second lens is R4, which satisfy the following condition: 0.10 < R4 / R1 < 0.70. Thereby, the radius of curvature of the object-side surface of the first lens and the radius of curvature of the image-side surface of the second lens can be adjusted, which helps to balance the converging ability of the light rays at the object-side end. Furthermore, it can satisfy the following condition: 0.15 < R4 / R1 < 0.65.

[0146] The radius of curvature of the object-side surface of the third lens is R5, and the radius of curvature of the image-side surface of the third lens is R6, which satisfy the following condition: -0.20 < (R5 + R6) / (R5 - R6) < 2.00. Thereby, the radius of curvature of the object-side surface of the third lens and the radius of curvature of the image-side surface of the third lens can be effectively balanced, which helps to improve the light-gathering quality of the imaging light rays, effectively improve the image bending situation and reduce the spherical aberration. Furthermore, it can satisfy the following condition: -0.10 < (R5 + R6) / (R5 - R6) < 1.25. Furthermore, it can satisfy the following condition: 0 < (R5 + R6) / (R5 - R6) < 1.50.

[0147] The thickness of the first lens on the optical axis is CT1, and the distance between the second lens and the third lens on the optical axis at an infinite object distance of the optical photographic lens group is T23L, which satisfy the following condition: 0.10 < CT1 / T23L < 1.70. Thereby, the central thickness of the first lens and the distance between the second lens and the third lens on the optical axis can be adjusted, which helps to maintain the spatial configuration of the first lens group. Furthermore, it can satisfy the following condition: 0.35 < CT1 / T23L < 1.70. Furthermore, it can satisfy the following condition: 0.42 < CT1 / T23L < 1.55. Furthermore, it can satisfy the following condition: 0.42 < CT1 / T23L < 1.50.

[0148] The distance from the image-side surface of the lens closest to the image side at an infinite object distance of the optical photographic lens group to the imaging surface on the optical axis is BLL, and the maximum image height of the optical photographic lens group is ImgH, which satisfy the following condition: 0.50 < BLL / ImgH < 1.10. Thereby, it helps to maintain an appropriate back focal length and increase the imaging surface. Furthermore, it can satisfy the following condition: 0.60 < BLL / ImgH < 1.00.

[0149] The displacement parallel to the optical axis from the intersection point on the optical axis of the object side surface of the third lens of the optical photographic lens group at an infinite object distance to the position of the maximum effective radius of the object side surface of the third lens is Sag3R1L, and the thickness of the third lens on the optical axis is CT3, which satisfies the following condition: 0 < |Sag3R1L| / CT3 < 0.30. Thereby, the bending degree of the peripheral surface shape of the object side of the third lens can be balanced, and the deflection angle of the light incident on the peripheral side of the third lens can be effectively controlled. Furthermore, it can satisfy the following condition: 0.01 < |Sag3R1L| / CT3 < 0.20.

[0150] The displacement parallel to the optical axis from the intersection point on the optical axis of the image side surface of the sixth lens of the optical photographic lens group at an infinite object distance to the position of the maximum effective radius of the image side surface of the sixth lens is Sag6R2L, and the thickness of the sixth lens on the optical axis is CT6, which satisfies the following condition: 0.60 < |Sag6R2L| / CT6 < 5.00. Thereby, the bending degree of the peripheral surface shape of the image side of the sixth lens can be balanced, which helps to increase the imaging surface and correct aberrations such as distortion. Furthermore, it can satisfy the following condition: 0.75 < |Sag6R2L| / CT6 < 3.00.

[0151] The position of the maximum effective radius of the object side surface of the first lens of the optical photographic lens group at an infinite object distance is Y1R1L, and the position of the maximum effective radius of the image side surface of the sixth lens of the optical photographic lens group at an infinite object distance is Y6R2L, which satisfies the following condition: 0.80 < Y1R1L / Y6R2L < 1.30. Thereby, the height of the effective diameter of the object side of the first lens and the height of the effective diameter of the image side of the sixth lens can be balanced, the traveling direction of the light can be adjusted, which helps to compress the outer diameter and increase the imaging surface. Furthermore, it can satisfy the following condition: 0.90 < Y1R1L / Y6R2L < 1.20.

[0152] The optical photographic lens group may further include a reflection element, which can provide different optical path directions for the optical photographic lens group, making the spatial configuration of the optical photographic lens group more flexible, which helps to reduce the mechanical limitations and miniaturize the optical photographic lens group. Furthermore, the reflection element can be located between the object to be photographed and the first lens. Thereby, the advantage of photographing long-distance scenery can be provided, and it helps to reduce the specification limitations in the thickness of the electronic device.

[0153] The focal length of the third lens is f3, and the focal length of the fifth lens is f5, which satisfies the following condition: 0.01 < |f3 / f5| < 0.80. Thereby, the refractive power intensity ratio of the third lens and the fifth lens can be adjusted, the optical path direction can be effectively controlled, which helps to reduce the incident angle of the light on the imaging surface. Furthermore, it can satisfy the following condition: 0.03 < |f3 / f5| < 0.55.

[0154] The thickness of the third lens on the optical axis is CT3, the thickness of the fourth lens on the optical axis is CT4, the thickness of the fifth lens on the optical axis is CT5, and the axial distance between the fourth lens and the fifth lens of the optical photographic lens group at an infinite object distance is T45L, which satisfies the following condition: 0.80 < CT3 / (CT4 + T45L + CT5) < 3.00. Thereby, by means of the ratio of the central thickness of the third lens and the axial distance from the object-side surface of the fourth lens to the image-side surface of the fifth lens, it helps to correct off-axis aberration and maintain a low chromatic aberration effect. Furthermore, it can satisfy the following condition: 1.00 < CT3 / (CT4 + T45L + CT5) < 2.50.

[0155] The axial distance between the second lens and the third lens of the optical photographic lens group at an infinite object distance is T23L, and the axial distance between the fourth lens and the fifth lens of the optical photographic lens group at an infinite object distance is T45L, which satisfies the following condition: 0.01 < T45L / T23L < 0.50. Thereby, it can balance the axial distance between the second lens and the third lens and the axial distance between the fourth lens and the fifth lens, which helps to compress the volume and correct spherical aberration. Furthermore, it can satisfy the following condition: 0.03 < T45L / T23L < 0.45.

[0156] The Abbe number of the fourth lens is V4, and the Abbe number of the sixth lens is V6, which satisfies the following condition: 90.0 < V4 + V6 < 130.0. Thereby, by adjusting the material configuration of the fourth lens and the sixth lens, it helps to prevent image overlap in shooting at multiple object distances, thereby improving the imaging quality. Furthermore, it can satisfy the following condition: 100.0 < V4 + V6 < 120.0.

[0157] The axial distance between the first lens group and the second lens group of the optical photographic lens group at an infinite object distance is TG1G2L, and the axial distance between the first lens group and the second lens group of the optical photographic lens group at a micro object distance is TG1G2S, which satisfies the following condition: 2.20 < (TG1G2S - TG1G2L) / TG1G2L < 6.00. Thereby, by increasing the movement amount of the second lens group during the moving focusing process, it helps to shoot objects at a smaller object distance and meet the requirements of large-size photosensitive element specifications, which helps to improve the imaging quality. Furthermore, it can satisfy the following condition: 2.50 < (TG1G2S - TG1G2L) / TG1G2L < 5.00.

[0158] The distance from the image-side surface of the lens closest to the image side of the optical photographic lens group at an infinite object distance to the imaging surface on the optical axis is BLL, and the distance from the image-side surface of the lens closest to the image side of the optical photographic lens group at a micro object distance to the imaging surface on the optical axis is BLS, which satisfy the following conditions: 1.50 < BLL / BLS < 3.00. Thereby, during the moving focusing process, the movement amount of the second lens group can be balanced by the back focus, and it helps to reduce the incident angle of light on the imaging surface and improve the optical illuminance. Furthermore, it can satisfy the following conditions: 1.60 < BLL / BLS < 2.60.

[0159] The thickness of the sixth lens on the optical axis is CT6, and the distance between the fifth lens and the sixth lens on the optical axis of the optical photographic lens group at an infinite object distance is T56L, which satisfy the following conditions: 0.01 < CT6 / T56L < 1.00. Thereby, the distance between the fifth lens and the sixth lens on the optical axis and the central thickness of the sixth lens can be balanced, which helps to increase the space utilization efficiency. Furthermore, it can satisfy the following conditions: 0.05 < CT6 / T56L < 0.80.

[0160] In addition, the barrel or lens of the optical photographic lens group can be cut to reduce the uniaxial length, which is beneficial to reducing the volume of the optical photographic lens group and further achieving miniaturization.

[0161] Each technical feature in the optical photographic lens group of the above disclosure content can be combined and configured to achieve the corresponding effects.

[0162] For the optical photographic lens group provided by the present disclosure content, the material of the lens can be glass or plastic. If the material of the lens is glass, the degree of freedom of the refractive power configuration of the optical photographic lens group can be increased, and the glass lens can be made by techniques such as grinding or molding. If the material of the lens is plastic, the production cost can be effectively reduced. In addition, a spherical surface or an aspherical surface (ASP) can be set on the lens surface. Among them, the spherical lens can reduce the manufacturing difficulty, and if an aspherical surface is set on the lens surface, more control variables can be obtained thereby to reduce aberrations, reduce the number of lenses, and effectively reduce the total length of the optical photographic lens group of the present disclosure content. The aspherical surface can be made by methods such as plastic injection molding or molding of glass lenses.

[0163] In the optical photographic lens group provided by the present disclosure, additives can be selectively added to any one (or more) of the lens materials to produce light absorption or light interference effects, so as to change the transmittance of the lens to light in a specific wavelength band, thereby reducing stray light and chromatic aberration. For example, the additive can have the function of filtering light in the wavelength band of 600 nm to 800 nm in the system to reduce excess red light or infrared light; or it can filter light in the wavelength band of 350 nm to 450 nm to reduce blue light or ultraviolet light in the system. Therefore, the additive can avoid interference to imaging caused by light in a specific wavelength band. In addition, the additive can be uniformly mixed in the plastic and made into a lens by injection molding technology. In addition, the additive can also be configured on the coating on the lens surface to provide the above-mentioned effects.

[0164] In the optical photographic lens group provided by the present disclosure, if the lens surface is an aspherical surface, it means that the entire or a part of the optically effective area of the lens surface is an aspherical surface.

[0165] In the optical photographic lens group provided by the present disclosure, if the lens surface is a convex surface and the position of the convex surface is not defined, it means that the lens surface can be convex near the optical axis; if the lens surface is a concave surface and the position of the concave surface is not defined, it means that the lens surface can be concave near the optical axis. In the optical photographic lens group provided by the present disclosure, if the lens has a positive refractive power or a negative refractive power, or the focal length of the lens, it can all refer to the refractive power or the focal length of the lens near the optical axis.

[0166] In the optical photographic lens group provided by the present disclosure, the critical point is the tangent point on the lens surface that is tangent to a tangent plane perpendicular to the optical axis except for the intersection point with the optical axis; the inflection point is the intersection point of the positive and negative changes of the lens surface curvature.

[0167] The imaging surface of the optical photographic lens group provided by the present disclosure can be a plane or a curved surface with any curvature according to the corresponding electronic photosensitive element, especially a curved surface with the concave surface facing the object side. In addition, in the optical photographic lens group of the present disclosure, one or more imaging correction elements (such as flat field elements) can be selectively arranged between the lens closest to the imaging surface on the imaging optical path and the imaging surface to achieve the effect of correcting the image (such as image curvature, etc.). The optical properties of the imaging correction element, such as curvature, thickness, refractive index, position, surface shape (convex or concave, spherical or aspherical, diffractive surface, Fresnel surface, etc.) can be adjusted according to the requirements of the imaging device. Generally speaking, a better configuration of the imaging correction element is to arrange a thin plano-concave element with a concave surface facing the object side near the imaging surface.

[0168] In the optical photographic lens group provided by the present disclosure, at least one reflecting element, such as a prism or a mirror, etc., can be included, which can make the spatial configuration more flexible. The reflecting element can be disposed between the object to be photographed and the imaging surface, which is beneficial to compressing the volume of the optical photographic lens group. The optical path can be reflected at least once through the reflecting element, and the angle between the reflecting surface (for example, its normal) and the optical axis is not limited to 45 degrees, and other angles can be adopted according to requirements such as spatial configuration. 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 degrees, 90 degrees or 180 degrees. In addition, for reasons such as reducing the occupied volume, the length and width of the mirror can be unequal, the length, width and height of the prism can be unequal, and the surface shape of the reflecting element can be a plane, an aspherical surface or a free-form surface, etc. according to requirements such as optical design, but not limited thereto. The following illustrates examples of different types and setting methods of reflecting elements in conjunction with the accompanying drawings, but not limited to the present disclosure.

[0169] Please refer to Figure 29A 、 Figure 29B and Figure 29C , which respectively show schematic diagrams of different types of reflecting elements LF arranged between the object to be photographed and the lens group LG of the optical photographic lens group. From Figure 29A 、 Figure 29B and Figure 29C , it can be seen that the optical photographic lens group can have a first optical axis OA1, a reflecting element LF, a second optical axis OA2, a lens group LG and a filter element IR in sequence along the optical path from the object to be photographed to the imaging surface IMG, wherein the reflecting element LF is disposed between the object to be photographed and the lens group LG of the optical photographic lens group. Specifically, Figure 29A , the reflecting element LF is a prism, and both its incident surface and exit surface are planes; Figure 29B , the reflecting element LF is a plane mirror; Figure 29C , the reflecting element LF is a prism, and both its incident surface and exit surface are curved surfaces.

[0170] Please refer to Figure 30A and Figure 30B , which respectively show schematic diagrams of two reflecting elements LF1 and LF2 of different types in the optical photographic lens group according to the present disclosure. From Figure 30A and Figure 30B , it can be seen that the optical photographic lens group can have a first optical axis OA1, a reflecting element LF1, a second optical axis OA2, a lens group LG, a filter element IR, a reflecting element LF2 and a third optical axis OA3 in sequence along the optical path from the object to be photographed to the imaging surface IMG, wherein the reflecting element LF1 is disposed between the object to be photographed and the lens group LG, and the optical path turning element LF2 is disposed between the filter element IR of the optical photographic lens group and the imaging surface IMG. Specifically, Figure 30A , both the reflecting element LF1 and the reflecting element LF2 are prisms, and both their incident surfaces and exit surfaces are planes;Figure 30B Among them, the reflecting element LF1 is a prism, and its incident light surface and outgoing light surface are both flat surfaces, and the reflecting element LF2 is a plane mirror.

[0171] Please refer to Figure 31A 、 Figure 31B and Figure 31C , which respectively show schematic diagrams of different types of reflecting elements LF in an optical photographic lens group according to the present disclosure. From Figure 31A 、 Figure 31B and Figure 31C , it can be seen that the reflecting element LF is arranged between the lens group LG and the imaging surface IMG, and the reflecting element LF provides at least two reflections. That is to say, after the light enters the lens group LG along the first optical axis OA1, it passes through at least two reflections of the reflecting element LF and then passes through the filter element IR along the second optical axis OA2 and is imaged on the imaging surface IMG. Specifically, Figure 31A in, the reflecting element LF provides four reflections; Figure 31B , the reflecting element LF is a pentaprism, which provides two reflections, and its incident light surface and outgoing light surface are both flat surfaces; Figure 31C , the reflecting element LF is a pentaprism, which provides two reflections, and its incident light surface and outgoing light surface are both curved surfaces.

[0172] Please refer to Figure 32A and Figure 32B , which respectively show schematic diagrams of different types of reflecting elements LF in an optical photographic lens group according to the present disclosure. From Figure 32A and Figure 32B , it can be seen that the reflecting element LF is arranged between the filter element IR and the imaging surface IMG, and the filter element IR is arranged on the image side of the lens group LG, and the reflecting element LF provides at least two reflections. That is to say, after the light enters the lens group LG along the first optical axis OA1, it passes through the filter element IR and then enters the reflecting element LF for at least two reflections, and is imaged on the imaging surface IMG along the second optical axis OA2. Specifically, Figure 32A in, the reflecting element LF provides at least two reflections; Figure 32B in, the reflecting element LF provides at least three reflections.

[0173] In addition, in the optical photographic lens group provided by the present disclosure, at least one aperture stop, such as an aperture stop, a flare stop or a field stop, etc., can be set according to requirements, which helps to reduce stray light and improve image quality.

[0174] In the optical photographic lens group provided by the present disclosure, the aperture configuration can be a front aperture or a middle aperture. Among them, the front aperture means that the aperture is arranged between the object to be photographed and the first lens, and the middle aperture means that the aperture is arranged between the first lens and the imaging surface. If the aperture is a front aperture, it can make the exit pupil of the optical photographic lens group have a longer distance from the imaging surface, making it have a telecentric effect, and can increase the efficiency of the CCD or CMOS of the electronic photosensitive element to receive images; if it is a middle aperture, it helps to expand the field of view angle of the optical photographic lens group, making it have the advantages of a wide-angle lens.

[0175] The present disclosure can appropriately set a variable aperture element. The variable aperture element can be a mechanical component or a light control element, and its aperture size and shape can be controlled by electricity or an electrical signal. The mechanical component can include movable parts such as a vane group and a shielding plate; the light control element can include shielding materials such as a filter element, an electrochromic material, and a liquid crystal layer. The variable aperture element can strengthen the ability of image adjustment by controlling the light incident amount or exposure time of the image. In addition, the variable aperture element can also be the aperture of the present disclosure, and the image quality can be adjusted by changing the aperture value, such as the depth of field or the exposure speed.

[0176] In the optical photographic lens group of the present disclosure, it can include at least one optical lens, optical element or carrier, and at least one surface thereof has a low-reflection layer. The low-reflection layer can effectively reduce the stray light generated by light reflection at the interface. The low-reflection layer can be set on the non-effective area of the object side surface or the image side surface of the optical lens, or the connecting surface between the object side surface and the image side surface; the optical element can be a light-shielding element, an annular spacer element, a lens barrel element, a cover glass, a blue glass, a filter element, an optical path turning element, a prism or a mirror, etc.; the carrier can be a lens group lens mount, a micro lens arranged on the photosensitive element, the periphery of the photosensitive element substrate, or a glass sheet for protecting the photosensitive element.

[0177] The optical photographic lens group provided by the present disclosure can also be applied in various aspects to electronic devices such as three-dimensional (3D) image capture, digital cameras, mobile products, digital tablets, smart TVs, network monitoring devices, motion-sensing game consoles, dash cams, reverse imaging devices, wearable products, and drones.

[0178] The present disclosure provides an imaging device, including the aforementioned optical photography lens group and an electronic photosensitive element, wherein the electronic photosensitive element is disposed on the imaging surface of the lens group of the photography system. Through the configuration of the refractive power, thickness, and distribution of the lenses in the optical photography lens group, the converging ability of the lenses in the image side section can be enhanced, the total length of the optical photography lens group can be shortened, and the space utilization efficiency can be increased. Preferably, the imaging device may further include a lens barrel, a support device, or a combination thereof.

[0179] The present disclosure provides an electronic device, including the aforementioned imaging device. Thereby, the imaging quality is improved. Preferably, each of the aforementioned electronic devices may further include a control unit, a display unit, a storage unit, a random access memory, or a combination thereof.

[0180] According to the above embodiments, specific embodiments are presented below and will be described in detail with reference to the accompanying drawings.

[0181] <First Embodiment>

[0182] Please refer to Figure 1A 、 Figure 1B 、 Figure 2A and Figure 2B , wherein Figure 1A FIG. shows a schematic diagram of an imaging device 1 according to the first embodiment of the present disclosure in a first state, Figure 1B FIG. shows Figure 1A a schematic diagram of the imaging device 1 according to the Figure 2A first embodiment in a second state, Figure 1A FIGS. show, from left to right in sequence, Figure 2B the spherical aberration, astigmatism, and distortion curves of the first embodiment, Figure 1B FIGS. show, from left to right in sequence, Figure 1A and Figure 1B the spherical aberration, astigmatism, and distortion curves of the first embodiment. As can be seen from Figure 1A and Figure 1BIn the first embodiment shown, the first lens group includes a first lens E1, a second lens E2, and a third lens E3, and the second lens group includes a fourth lens E4, a fifth lens E5, and a sixth lens E6. When the object moves from infinity to a micro object distance, the optical photographic lens group changes from the first state to the second state. During the moving focusing process (i.e., from the first state to the second state), the second lens group moves toward the image side along the optical axis relative to the first lens group; during the moving focusing process, there is no relative movement between the lenses in each lens group. Additionally, Figure 1A In the first state revealed, the aperture stop S2 is the aperture of the optical photographic lens group; Figure 1B In the second state revealed, the aperture stop S3 is the aperture of the optical photographic lens group.

[0183] The first lens E1 has a positive refractive power and is made of glass. Its object-side surface near the optical axis is convex, and its image-side surface near the optical axis is convex, and both are aspherical surfaces. Additionally, with reference to Figure 21A , it shows a schematic diagram of the inflection points IP and critical points CP of each lens of the optical photographic lens group in the first state according to Figure 1A the first embodiment. As can be seen from Figure 21A , the object-side surface of the first lens includes an inflection point IP, and the image-side surface of the first lens includes two inflection points IP.

[0184] The second lens E2 has a negative refractive power and is made of plastic. Its object-side surface near the optical axis is convex, and its image-side surface near the optical axis is concave, and both are aspherical surfaces. Additionally, the object-side surface of the second lens includes an inflection point IP (marked in Figure 21A ), and the image-side surface of the second lens includes an inflection point IP (marked in Figure 21A ).

[0185] The third lens E3 has a positive refractive power and is made of plastic. Its object-side surface near the optical axis is convex, and its image-side surface near the optical axis is convex, and both are aspherical surfaces. Additionally, the object-side surface of the third lens includes an inflection point IP (marked in Figure 21A ).

[0186] The fourth lens E4 has a negative refractive power and is made of plastic. Its object-side surface near the optical axis is concave, and its image-side surface near the optical axis is convex, and both are aspherical surfaces. Additionally, the object-side surface of the fourth lens includes an inflection point IP (marked in Figure 21A ) and a convex critical point CP (marked in Figure 21A ), and the image-side surface of the fourth lens includes three inflection points IP (marked in Figure 21A ) and a concave critical point CP (marked in Figure 21A ).

[0187] The fifth lens E5 has a 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, and both are aspherical surfaces. In addition, the object-side surface of the fifth lens includes two inflection points IP (marked in Figure 21A ) and a concave critical point CP (marked in Figure 21A ). The image-side surface of the fifth lens includes two inflection points IP (marked in Figure 21A ) and a convex critical point CP and a concave critical point CP (marked in Figure 21A ).

[0188] The sixth lens E6 has a 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, and both are aspherical surfaces. In addition, the object-side surface of the sixth lens includes an inflection point IP (marked in Figure 21A ), and the image-side surface of the sixth lens includes an inflection point IP (marked in Figure 21A ).

[0189] In the first embodiment, the reflection element E8 is disposed between the object to be photographed and the first lens E1, that is, at the outermost object side of the optical photographic lens group. The reflection element E8 in the first embodiment is a prism and is made of glass. In addition, please refer to Figure 22A and Figure 22B , which respectively show schematic diagrams of the imaging device 1 according to the first embodiment of the present disclosure with different types of reflection elements E8 disposed in the first state and the second state. From Figure 22A and Figure 22B , it can be seen that the reflection element E8 can also be configured as a prism that can turn the optical path, and the present disclosure is not limited thereto.

[0190] The filter element E7 is made of glass and is disposed between the sixth lens E6 and the imaging surface IMG without affecting the focal length of the optical photographic lens group.

[0191] The curve equations of the aspherical surfaces of the above lenses are expressed as follows:

[0192]

[0193] ; where:

[0194] X: The displacement parallel to the optical axis from the intersection point of the aspherical surface and the optical axis to the point on the aspherical surface that is at a distance Y from the optical axis;

[0195] Y: The perpendicular distance from the point on the aspherical curve to the optical axis;

[0196] R: Radius of curvature;

[0197] k: Conic coefficient; and

[0198] Ai: The i-th order aspherical coefficient.

[0199] Refer to Table 1A and Table 1B below for further reference.

[0200]

[0201]

[0202]

[0203]

[0204]

[0205] Table 1A is Figure 1A and Figure 1B the detailed structural data of the first embodiment, where the units of the radius of curvature, thickness, and focal length are mm, and the surfaces 0 - 21 represent the surfaces from the object side to the image side in sequence. The refractive index is the refractive index measured at the reference wavelength. Table 1B is the aspherical data in the first embodiment, where k represents the conic coefficient in the aspherical curve equation, and A4 - A30 represent the 4th - 30th order aspherical coefficients of each surface. In addition, the following tables of each embodiment correspond to the schematic diagrams and aberration curves of each embodiment, and the definitions of the data in the tables are the same as those in Table 1A and Table 1B of the first embodiment, which will not be elaborated here.

[0206] When the optical photographic lens group of the first embodiment is in Figure 1A the first state disclosed, it refers to the state of the optical photographic lens group when the object to be photographed is at infinity; when the optical photographic lens group of the first embodiment is in Figure 1B the second state disclosed, it refers to the state of the optical photographic lens group when the object to be photographed is at an object distance of less than 200 mm (i.e., the micro - object distance referred to in this disclosure); where the object distance is the distance on the optical axis from the object to be photographed to the object - side surface of the lens closest to the object side in the optical photographic lens group (in the first embodiment, it is the first lens E1). Referring to Table 1A above, when the first embodiment is in the first state and the second state, the corresponding object distances and the values of D0, D1, and D2 in Table 1A are disclosed as follows in Table 1C.

[0207]

[0208]

[0209] Figure 1AIn the optical photographic lens group disclosed in the first embodiment in the first state, the focal length of the optical photographic lens group at an infinite object distance is fL, the aperture value (f-number) of the optical photographic lens group at an infinite object distance is FnoL, half of the maximum viewing angle of the optical photographic lens group at an infinite object distance is HFOVL, and the maximum viewing angle of the optical photographic lens group at an infinite object distance is FOVL. The numerical values are as follows: fL = 18.58 mm; FnoL = 1.94; HFOVL = 16.8 degrees; and FOVL = 33.6 degrees.

[0210] Figure 1B In the optical photographic lens group disclosed in the first embodiment in the second state, the focal length of the optical photographic lens group at a micro object distance is fS, the aperture value of the optical photographic lens group at a micro object distance is FnoS, half of the maximum viewing angle of the optical photographic lens group at a micro object distance is HFOVS, and the maximum viewing angle of the optical photographic lens group at a micro object distance is FOVS. The numerical values are as follows: fS = 14.26 mm; FnoS = 1.88; HFOVS = 16.7 degrees; and FOVS = 33.4 degrees.

[0211] In the optical photographic lens group of the first embodiment, the distance from the object side surface of the first lens to the imaging surface IMG on the optical axis at an infinite object distance is TLL, and the distance from the object side surface of the first lens to the imaging surface IMG on the optical axis at a micro object distance is TLS. The following condition is satisfied: TLL / TLS = 1.00.

[0212] In the optical photographic lens group of the first embodiment, the distance from the image side surface of the lens closest to the image side at an infinite object distance (i.e., the sixth lens E6) to the imaging surface IMG on the optical axis is BLL, and the distance from the image side surface of the lens closest to the image side at a micro object distance (i.e., the sixth lens E6) to the imaging surface IMG on the optical axis is BLS. The following condition is satisfied: BLL / BLS = 2.42.

[0213] In the optical photographic lens group of the first embodiment, the axial interval distance from the first lens group to the second lens group at an infinite object distance is TG1G2L, and the axial interval distance from the first lens group to the second lens group at a micro object distance is TG1G2S. The following condition is satisfied: (TG1G2S - TG1G2L) / TG1G2L = 3.33.

[0214] In the optical photographic lens group of the first embodiment, the distance from the image side surface of the lens closest to the image side at an infinite object distance (i.e., the sixth lens E6) to the imaging surface IMG on the optical axis is BLL, and the maximum image height of the optical photographic lens group is ImgH. The following condition is satisfied: BLL / ImgH = 0.90.

[0215] In the optical photographic lens group of the first embodiment, the focal length of the third lens E3 is f3, the focal length of the fifth lens E5 is f5, and the focal length of the sixth lens E6 is f6, which satisfy the following conditions: |f3 / f6| = 0.46; and |f3 / f5| = 0.15.

[0216] In the optical photographic lens group of the first embodiment, the focal length of the second lens E2 is f2, the radius of curvature of the object-side surface of the second lens is R3, and the radius of curvature of the image-side surface of the second lens is R4, which satisfy the following conditions: |f2 / R3| + |f2 / R4| = 9.47.

[0217] In the optical photographic lens group of the first embodiment, the distance from the object-side surface of the first lens to the imaging surface IMG on the optical axis at an infinite object distance is TLL, the distance from the object-side surface of the first lens to the image-side surface of the third lens on the optical axis at an infinite object distance is Dr1r6L, and the distance from the object-side surface of the fourth lens to the image-side surface of the sixth lens on the optical axis at an infinite object distance is Dr7r12L, which satisfy the following conditions: TLL / Dr1r6L = 2.23; and Dr1r6L / Dr7r12L = 1.68.

[0218] In the optical photographic lens group of the first embodiment, the thickness of the first lens E1 on the optical axis is CT1, the thickness of the second lens E2 on the optical axis is CT2, the thickness of the third lens E3 on the optical axis is CT3, and the distance between the second lens E2 and the third lens E3 on the optical axis at an infinite object distance is T23L, which satisfy the following conditions: CT1 / T23L = 0.59; CT1 / CT3 = 0.67; and CT2 / CT3 = 0.34.

[0219] In the optical photographic lens group of the first embodiment, the thickness of the third lens E3 on the optical axis is CT3, the thickness of the fourth lens E4 on the optical axis is CT4, the thickness of the fifth lens E5 on the optical axis is CT5, and the distance between the fourth lens E4 and the fifth lens E5 on the optical axis at an infinite object distance is T45L, which satisfy the following conditions: CT3 / (CT4 + T45L + CT5) = 1.93.

[0220] In the optical photographic lens group of the first embodiment, the thickness of the fourth lens E4 on the optical axis is CT4, and the distance between the second lens E2 and the third lens E3 on the optical axis at an infinite object distance is T23L, which satisfy the following conditions: CT4 / T23L = 0.20.

[0221] In the optical photographic lens group of the first embodiment, the thickness of the fourth lens E4 on the optical axis is CT4, the thickness of the fifth lens E5 on the optical axis is CT5, and the distance between the fifth lens E5 and the sixth lens E6 on the optical axis at an infinite object distance of the optical photographic lens group is T56L, which satisfies the following condition: (CT4 + CT5) / T56L = 0.36.

[0222] In the optical photographic lens group of the first embodiment, the thickness of the sixth lens E6 on the optical axis is CT6, and the distance between the fifth lens E5 and the sixth lens E6 on the optical axis at an infinite object distance of the optical photographic lens group is T56L, which satisfies the following condition: CT6 / T56L = 0.14.

[0223] In the optical photographic lens group of the first embodiment, the distance between the second lens E2 and the third lens E3 on the optical axis at an infinite object distance of the optical photographic lens group is T23L, and the distance between the fourth lens E4 and the fifth lens E5 on the optical axis at an infinite object distance of the optical photographic lens group is T45L, which satisfies the following condition: T45L / T23L = 0.08.

[0224] In the optical photographic lens group of the first embodiment, the radius of curvature of the image-side surface of the first lens is R2, the radius of curvature of the object-side surface of the second lens is R3, and the radius of curvature of the image-side surface of the second lens is R4, which satisfies the following conditions: (R2 + R3) / (R2 - R3) = 0.57; and (R3 - R4) / (R3 + R4) = 0.22.

[0225] In the optical photographic lens group of the first embodiment, the radius of curvature of the object-side surface of the third lens is R5, and the radius of curvature of the image-side surface of the third lens is R6, which satisfies the following condition: (R5 + R6) / (R5 - R6) = 0.48.

[0226] In the optical photographic lens group of the first embodiment, the radius of curvature of the object-side surface of the first lens is R1, and the radius of curvature of the image-side surface of the second lens is R4, which satisfies the following condition: R4 / R1 = 0.24.

[0227] In the optical photographic lens group of the first embodiment, the Abbe number of the fourth lens E4 is V4, and the Abbe number of the sixth lens E6 is V6, which satisfies the following condition: V4 + V6 = 112.0.

[0228] Please refer to Figure 21B , which shows in accordance with Figure 1A a schematic diagram of some parameters of the optical photographic lens group in the first state in the first embodiment. As can be seen from Figure 21B , the displacement amount parallel to the optical axis from the intersection point of the object-side surface of the third lens on the optical axis to the maximum effective radius position of the object-side surface of the third lens at an infinite object distance of the optical photographic lens group is Sag3R1L (marked in Figure 21B), the thickness of the third lens E3 on the optical axis is CT3, which satisfies the following condition: |Sag3R1L| / CT3 = 0.06.

[0229] In the optical photographic lens group of the first embodiment, the displacement amount parallel to the optical axis from the intersection point on the optical axis of the image side surface of the sixth lens of the optical photographic lens group at an infinite object distance to the maximum effective radius position of the image side surface of the sixth lens is Sag6R2L (marked in Figure 21B ), the thickness of the sixth lens E6 on the optical axis is CT6, which satisfies the following condition: |Sag6R2L| / CT6 = 1.26.

[0230] In the optical photographic lens group of the first embodiment, the maximum effective radius position of the object side surface of the first lens of the optical photographic lens group at an infinite object distance is Y1R1L, and the maximum effective radius position of the image side surface of the sixth lens of the optical photographic lens group at an infinite object distance is Y6R2L, which satisfies the following condition: Y1R1L / Y6R2L = 1.13.

[0231] In addition, please refer to Figure 23A and Figure 23B , which respectively show the schematic diagrams of any one of the diaphragms S1, S2, S3, and S4 in different non-circular forms according to Figure 1A the first embodiment. As can be seen from Figure 23A , the shape of any one of the diaphragms S1, S2, S3, and S4 is fixed and is an ellipse, and it has a major axis and a minor axis, where the major axis is along the direction X and the minor axis is along the direction Y, and it has a minor axis effective radius RY and a major axis effective radius RX. As can be seen from Figure 23B , the shape of any one of the diaphragms S1, S2, S3, and S4 is fixed. The difference from the Figure 23A disclosed form is that it is an ellipse and the two opposite sides are trimmed along the major axis direction X, and it also has a minor axis effective radius RY and a major axis effective radius RX. It should be noted that the diaphragm of the present disclosure is not limited to the Figure 23A and Figure 23B disclosed content.

[0232] <Second Embodiment>

[0233] Please refer to Figure 3A , Figure 3B , Figure 4A and Figure 4B , where Figure 3A shows a schematic diagram of an imaging device 2 in a first state according to the second embodiment of the present disclosure, Figure 3B shows a schematic diagram of the imaging device 2 in a second state according to Figure 3A the second embodiment, Figure 4A from left to right in sequence are Figure 3A the spherical aberration, astigmatism, and distortion curve graphs of the second embodiment,Figure 4B From left to right in sequence is Figure 3B The spherical aberration, astigmatism and distortion curves of the second embodiment. From Figure 3A and Figure 3B it can be seen that the imaging device 2 of the second embodiment includes an optical photographic lens group (not labeled separately) and an electronic photosensitive element IS. The optical photographic lens group includes, in sequence from the object side to the image side of the optical path, a reflection element E8, a diaphragm S1, a first lens E1, a second lens E2, a diaphragm S2, a third lens E3, a diaphragm S3, a fourth lens E4, a diaphragm S4, a fifth lens E5, a sixth lens E6, a filter element E7, and an imaging surface IMG, and the electronic photosensitive element IS is disposed on the imaging surface IMG of the optical photographic lens group, wherein the optical photographic lens group includes six lenses (E1, E2, E3, E4, E5, E6), and there are no other interpolated lenses between the six lenses. Furthermore, the optical photographic lens group includes two lens groups, which are, in sequence from the object side to the image side of the optical path, the first lens group and the second lens group, Figure 3A and Figure 3B In the second embodiment shown, the first lens group includes the first lens E1, the second lens E2, and the third lens E3, and the second lens group includes the fourth lens E4, the fifth lens E5, and the sixth lens E6. When the object moves from infinity to a micro object distance, the optical photographic lens group changes from the first state to the second state. When moving during the focusing process (i.e., changing from the first state to the second state), relative to the first lens group, the second lens group moves toward the image side along the optical axis; when moving during the focusing process, there is no relative movement between the lenses in each lens group. In addition, Figure 3A in the first state disclosed, the diaphragm S2 is the aperture of the optical photographic lens group; Figure 3B in the second state disclosed, the diaphragm S3 is the aperture of the optical photographic lens group.

[0234] The first lens E1 has a positive refractive power and is made of glass. Its object-side surface near the optical axis is convex, and its image-side surface near the optical axis is concave, and both are aspherical surfaces. In addition, the object-side surface of the first lens includes an inflection point, and the image-side surface of the first lens includes an inflection point.

[0235] The second lens E2 has a negative refractive power and is made of plastic. Its object-side surface near the optical axis is convex, and its image-side surface near the optical axis is concave, and both are aspherical surfaces. In addition, the object-side surface of the second lens includes two inflection points.

[0236] The third lens E3 has a positive refractive power and is made of plastic. Its object-side surface near the optical axis is convex, and its image-side surface near the optical axis is convex, and both are aspherical surfaces. In addition, the object-side surface of the third lens includes an inflection point and a concave critical point.

[0237] The fourth lens E4 has a 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, and both are aspherical surfaces. In addition, the object-side surface of the fourth lens includes an inflection point and a convex critical point, and the image-side surface of the fourth lens includes an inflection point and a concave critical point.

[0238] The fifth lens E5 has a 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, and both are aspherical surfaces. In addition, the object-side surface of the fifth lens includes two inflection points and a concave critical point, and the image-side surface of the fifth lens includes two inflection points and a convex critical point.

[0239] The sixth lens E6 has a 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, and both are aspherical surfaces. In addition, the object-side surface of the sixth lens includes an inflection point, and the image-side surface of the sixth lens includes an inflection point.

[0240] In the second embodiment, the reflection element E8 is disposed between the object and the first lens E1, that is, on the most object side of the optical imaging lens group. The reflection element E8 in the second embodiment is a prism and is made of glass.

[0241] The filter element E7 is made of glass and is disposed between the sixth lens E6 and the imaging surface IMG without affecting the focal length of the optical imaging lens group.

[0242] Refer to Table 2A and Table 2B below for further reference.

[0243]

[0244]

[0245]

[0246]

[0247] With reference to Table 2A above, when the second embodiment is in the first state and the second state, the corresponding object distances and the values of D0, D1, and D2 in Table 2A are as disclosed in Table 2C below.

[0248]

[0249] In the second embodiment, the curve equation of the aspherical surface is expressed in the same form as that in the first embodiment. In addition, the definitions of the following parameters are the same as those in the first embodiment and will not be elaborated here.

[0250] Based on Table 2A, Table 2B, and Table 2C, the data in Table 2D below can be calculated:

[0251]

[0252]

[0253] <Third Embodiment>

[0254] Please refer to Figure 5A 、 Figure 5B 、 Figure 6A and Figure 6B wherein Figure 5A FIG. Figure 5A shows a schematic diagram of an imaging device 3 according to the third embodiment of the present disclosure in a first state, Figure 5B FIG. Figure 5B shows Figure 5A a schematic diagram of the imaging device 3 according to the third embodiment in a second state, Figure 6A From left to right in sequence are Figure 5A the spherical aberration, astigmatism and distortion curves of the third embodiment, Figure 6B From left to right in sequence are Figure 5B the spherical aberration, astigmatism and distortion curves of the third embodiment. As can be seen from Figure 5A and Figure 5B the imaging device 3 of the third embodiment includes an optical photography lens group (not labeled separately) and an electronic photosensitive element IS. The optical photography lens group sequentially includes a reflection element E8, a diaphragm S1, a first lens E1, a second lens E2, a diaphragm S2, a third lens E3, a diaphragm S3, a fourth lens E4, a diaphragm S4, a fifth lens E5, a sixth lens E6, a filter element E7 and an imaging surface IMG from the object side to the image side of the optical path, and the electronic photosensitive element IS is disposed on the imaging surface IMG of the optical photography lens group, wherein the optical photography lens group includes six lenses (E1, E2, E3, E4, E5, E6), and there are no other interpolated lenses between the six lenses. Furthermore, the optical photography lens group includes two lens groups, which are sequentially the first lens group and the second lens group from the object side to the image side of the optical path, Figure 5A and Figure 5B In the third embodiment shown in FIG. Figure 5B , the first lens group includes the first lens E1, the second lens E2 and the third lens E3, and the second lens group includes the fourth lens E4, the fifth lens E5 and the sixth lens E6. When the object to be photographed moves from infinity to a micro object distance, the optical photography lens group changes from the first state to the second state. During the moving focusing process (i.e., from the first state to the second state), the second lens group moves toward the image side along the optical axis relative to the first lens group; during the moving focusing process, there is no relative movement between the lenses in each lens group. Additionally, Figure 5A in the first state disclosed, the diaphragm S2 is the aperture of the optical photography lens group; Figure 5B in the second state disclosed, the diaphragm S3 is the aperture of the optical photography lens group.

[0255] The first lens E1 has a 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, and both are aspherical surfaces. In addition, the image-side surface of the first lens includes two inflection points.

[0256] The second lens E2 has a 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, and both are aspherical surfaces. In addition, the object-side surface of the second lens includes an inflection point.

[0257] The third lens E3 has a 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, and both are aspherical surfaces. In addition, the object-side surface of the third lens includes an inflection point.

[0258] The fourth lens E4 has a 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, and both are aspherical surfaces. In addition, the object-side surface of the fourth lens includes an inflection point and a convex critical point.

[0259] The fifth lens E5 has a 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, and both are aspherical surfaces. In addition, the object-side surface of the fifth lens includes an inflection point and a concave critical point, and the image-side surface of the fifth lens includes two inflection points.

[0260] The sixth lens E6 has a 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, and both are aspherical surfaces. In addition, the object-side surface of the sixth lens includes an inflection point, and the image-side surface of the sixth lens includes an inflection point.

[0261] In the third embodiment, the reflecting element E8 is disposed between the object and the first lens E1, that is, on the outermost object side of the optical photographing lens group. The reflecting element E8 in the third embodiment is a prism and is made of glass.

[0262] The filter element E7 is made of glass and is disposed between the sixth lens E6 and the imaging surface IMG without affecting the focal length of the optical photographing lens group.

[0263] Refer to Table 3A and Table 3B below for further reference.

[0264]

[0265]

[0266]

[0267]

[0268] With reference to Table 3A above, when the third embodiment is in the first state and the second state, the corresponding object distances and the values of D0, D1, and D2 in Table 3A are as disclosed in Table 3C below.

[0269]

[0270] In the third embodiment, the aspheric curve equation is expressed in the same form as in the first embodiment. In addition, the definitions of the following parameters are the same as those in the first embodiment and will not be elaborated here.

[0271] Combining Table 3A, Table 3B, and Table 3C, the data in the following Table 3D can be deduced:

[0272]

[0273]

[0274] <Fourth Embodiment>

[0275] Please refer to Figure 7A , Figure 7B , Figure 8A and Figure 8B , where Figure 7A shows a schematic diagram of an imaging device 4 according to the fourth embodiment of the present disclosure in the first state, Figure 7B shows a schematic diagram of Figure 7A the imaging device 4 according to the fourth embodiment in the second state, Figure 8A from left to right in sequence are Figure 7A the spherical aberration, astigmatism, and distortion curve graphs of the fourth embodiment, Figure 8B from left to right in sequence are Figure 7B the spherical aberration, astigmatism, and distortion curve graphs of the fourth embodiment. From Figure 7A and Figure 7B it can be seen that the imaging device 4 of the fourth embodiment includes an optical photography lens group (not labeled separately) and an electronic photosensitive element IS. The optical photography lens group sequentially includes a reflection element E8, a diaphragm S1, a first lens E1, a second lens E2, a diaphragm S2, a third lens E3, a diaphragm S3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a diaphragm S4, a filter element E7, and an imaging surface IMG from the object side to the image side of the optical path, and the electronic photosensitive element IS is disposed on the imaging surface IMG of the optical photography lens group, where the optical photography lens group includes six lenses (E1, E2, E3, E4, E5, E6), and there are no other interpolated lenses between the six lenses. Furthermore, the optical photography lens group includes two lens groups, which are sequentially the first lens group and the second lens group from the object side to the image side of the optical path, Figure 7A and Figure 7BIn the fourth embodiment shown, the first lens group includes a first lens E1, a second lens E2, and a third lens E3, and the second lens group includes a fourth lens E4, a fifth lens E5, and a sixth lens E6. When the object moves from infinity to a micro object distance, the optical photographic lens group changes from the first state to the second state. During the moving focusing process (i.e., from the first state to the second state), the second lens group moves toward the image side along the optical axis direction relative to the first lens group; during the moving focusing process, there is no relative movement between the lenses in each lens group. Additionally, Figure 7A In the first state disclosed, the aperture stop S2 is the aperture of the optical photographic lens group; Figure 7B In the second state disclosed, the aperture stop S3 is the aperture of the optical photographic lens group.

[0276] The first lens E1 has a positive refractive power and is made of plastic. Its object-side surface near the optical axis is convex, and its image-side surface near the optical axis is convex, and both are aspherical surfaces. Additionally, the object-side surface of the first lens includes an inflection point.

[0277] The second lens E2 has a negative refractive power and is made of plastic. Its object-side surface near the optical axis is convex, and its image-side surface near the optical axis is concave, and both are aspherical surfaces. Additionally, the object-side surface of the second lens includes two inflection points.

[0278] The third lens E3 has a positive refractive power and is made of glass. Its object-side surface near the optical axis is convex, and its image-side surface near the optical axis is convex, and both are aspherical surfaces. Additionally, the object-side surface of the third lens includes two inflection points.

[0279] The fourth lens E4 has a negative refractive power and is made of plastic. Its object-side surface near the optical axis is concave, and its image-side surface near the optical axis is concave, and both are aspherical surfaces. Additionally, the object-side surface of the fourth lens includes an inflection point and a convex critical point, and the image-side surface of the fourth lens includes two inflection points.

[0280] The fifth lens E5 has a positive refractive power and is made of plastic. Its object-side surface near the optical axis is convex, and its image-side surface near the optical axis is concave, and both are aspherical surfaces. Additionally, the object-side surface of the fifth lens includes two inflection points and a concave critical point, and the image-side surface of the fifth lens includes two inflection points.

[0281] The sixth lens E6 has a negative refractive power and is made of plastic. Its object-side surface near the optical axis is concave, and its image-side surface near the optical axis is convex, and both are aspherical surfaces. Additionally, the object-side surface of the sixth lens includes an inflection point, and the image-side surface of the sixth lens includes an inflection point.

[0282] In the fourth embodiment, a reflecting element E8 is disposed between the object and the first lens E1, i.e., at the outermost object side of the optical photographic lens group, and the reflecting element E8 in the fourth embodiment is a prism and is made of glass.

[0283] The filter element E7 is made of glass and is disposed between the sixth lens E6 and the imaging surface IMG without affecting the focal length of the optical camera lens group.

[0284] Refer to Table 4A and Table 4B below for further reference.

[0285]

[0286]

[0287]

[0288]

[0289] With reference to Table 4A above, in the fourth embodiment, in the first state and the second state, the corresponding object distances and the values of D0, D1, and D2 in Table 4A are as disclosed in Table 4C below.

[0290]

[0291] In the fourth embodiment, the aspherical curve equation is expressed in the same form as in the first embodiment. In addition, the definitions of the following parameters are the same as those in the first embodiment and will not be elaborated here.

[0292] Based on Table 4A, Table 4B, and Table 4C, the data in Table 4D below can be deduced:

[0293]

[0294]

[0295] <The Fifth Embodiment>

[0296] Please refer to Figure 9A , Figure 9B , Figure 10A and Figure 10B , where Figure 9A FIG. 50 shows a schematic diagram of an imaging device 5 in a first state according to a fifth embodiment of the present disclosure. Figure 9B FIG. shows according to Figure 9A a schematic diagram of the imaging device 5 of the fifth embodiment in a second state. Figure 10A From left to right, they are in sequence Figure 9A the spherical aberration, astigmatism, and distortion curves of the fifth embodiment, Figure 10B From left to right, they are in sequence Figure 9B the spherical aberration, astigmatism, and distortion curves of the fifth embodiment. From Figure 9A and Figure 9BIt can be known that the imaging device 5 of the fifth embodiment includes an optical photographing lens group (not labeled separately) and an electronic photosensitive element IS. The optical photographing lens group sequentially includes a reflection element E8, a diaphragm S1, a first lens E1, a second lens E2, a diaphragm S2, a third lens E3, a diaphragm S3, a fourth lens E4, a diaphragm S4, a fifth lens E5, a diaphragm S5, a sixth lens E6, a filter element E7, and an imaging surface IMG from the object side to the image side of the optical path. The electronic photosensitive element IS is disposed on the imaging surface IMG of the optical photographing lens group. The optical photographing lens group includes six lenses (E1, E2, E3, E4, E5, E6), and there are no other interpolated lenses between the six lenses. Furthermore, the optical photographing lens group includes two lens groups, which are the first lens group and the second lens group sequentially from the object side to the image side of the optical path, Figure 9A and Figure 9B in the fifth embodiment shown, the first lens group includes the first lens E1, the second lens E2, and the third lens E3, and the second lens group includes the fourth lens E4, the fifth lens E5, and the sixth lens E6. When the object moves from infinity to a micro object distance, the optical photographing lens group changes from the first state to the second state. When moving in the focusing process (i.e., changing from the first state to the second state), the second lens group moves toward the image side along the optical axis with respect to the first lens group; when moving in the focusing process, there is no relative movement between the lenses in each lens group. In addition, Figure 9A in the first state disclosed, the diaphragm S2 is the aperture of the optical photographing lens group; Figure 9B in the second state disclosed, the diaphragm S3 is the aperture of the optical photographing lens group.

[0297] The first lens E1 has a positive refractive power and is made of glass. Its object-side surface near the optical axis is convex, and its image-side surface near the optical axis is convex, and both are aspherical surfaces. In addition, the object-side surface of the first lens includes an inflection point, and the image-side surface of the first lens includes two inflection points.

[0298] The second lens E2 has a negative refractive power and is made of plastic. Its object-side surface near the optical axis is convex, and its image-side surface near the optical axis is concave, and both are aspherical surfaces. In addition, the object-side surface of the second lens includes an inflection point and a concave critical point, and the image-side surface of the second lens includes an inflection point.

[0299] The third lens E3 has a positive refractive power and is made of plastic. Its object-side surface near the optical axis is convex, and its image-side surface near the optical axis is convex, and both are aspherical surfaces. In addition, the object-side surface of the third lens includes an inflection point.

[0300] The fourth lens E4 has a negative refractive power and is made of plastic. Its object-side surface near the optical axis is convex, and its image-side surface near the optical axis is concave, and both are aspherical surfaces.

[0301] The fifth lens E5 has a positive refractive power and is made of plastic. Its object-side surface near the optical axis is convex, and its image-side surface near the optical axis is concave, and both are aspherical surfaces. In addition, the object-side surface of the fifth lens includes two inflection points and one concave critical point, and the image-side surface of the fifth lens includes two inflection points and one convex critical point.

[0302] The sixth lens E6 has a negative refractive power and is made of plastic. Its object-side surface near the optical axis is convex, and its image-side surface near the optical axis is concave, and both are aspherical surfaces. In addition, the object-side surface of the sixth lens includes two inflection points and one convex critical point and one concave critical point, and the image-side surface of the sixth lens includes two inflection points and one convex critical point.

[0303] In the fifth embodiment, the reflection element E8 is disposed between the object and the first lens E1, that is, at the outermost object side of the optical photographic lens group. The reflection element E8 in the fifth embodiment is a prism and is made of glass.

[0304] The filter element E7 is made of glass and is disposed between the sixth lens E6 and the imaging surface IMG without affecting the focal length of the optical photographic lens group.

[0305] Refer to Table 5A and Table 5B below.

[0306]

[0307]

[0308]

[0309]

[0310] With reference to Table 5A above, when the fifth embodiment is in the first state and the second state, the corresponding object distances and the values of D0, D1, and D2 in Table 5A are as shown in Table 5C below.

[0311]

[0312] In the fifth embodiment, the curve equation of the aspherical surface is expressed in the same form as in the first embodiment. In addition, the definitions of the following parameters are the same as those in the first embodiment and will not be elaborated here.

[0313] Based on Table 5A, Table 5B, and Table 5C, the data in Table 5D below can be calculated:

[0314]

[0315]

[0316] <Sixth Embodiment>

[0317] Please refer toFigure 11A , Figure 11B , Figure 12A and Figure 12B , where Figure 11A FIG. 9 shows a schematic diagram of an imaging device 6 according to the sixth embodiment of the present disclosure in a first state, Figure 11B FIG. Figure 11A 10 shows a schematic diagram of the imaging device 6 according to the sixth embodiment in a second state, Figure 12A from left to right are in sequence Figure 11A the spherical aberration, astigmatism and distortion curves of the sixth embodiment, Figure 12B from left to right are in sequence Figure 11B the spherical aberration, astigmatism and distortion curves of the sixth embodiment. From Figure 11A and Figure 11B it can be seen that the imaging device 6 of the sixth embodiment includes an optical photographing lens group (not labeled separately) and an electronic photosensitive element IS. The optical photographing lens group sequentially includes a reflection element E8, a diaphragm S1, a first lens E1, a second lens E2, a diaphragm S2, a third lens E3, a diaphragm S3, a fourth lens E4, a diaphragm S4, a fifth lens E5, a sixth lens E6, a filter element E7, and an imaging surface IMG from the object side to the image side of the optical path, and the electronic photosensitive element IS is disposed on the imaging surface IMG of the optical photographing lens group, where the optical photographing lens group includes six lenses (E1, E2, E3, E4, E5, E6), and there are no other interpolated lenses between the six lenses. Furthermore, the optical photographing lens group includes two lens groups, which are sequentially the first lens group and the second lens group from the object side to the image side of the optical path, Figure 11A and Figure 11B in the sixth embodiment shown, the first lens group includes a first lens E1, a second lens E2, and a third lens E3, and the second lens group includes a fourth lens E4, a fifth lens E5, and a sixth lens E6. When the object to be photographed moves from infinity to a micro object distance, the optical photographing lens group changes from the first state to the second state. When moving during the focusing process (i.e., changing from the first state to the second state), relative to the first lens group, the second lens group moves toward the image side along the optical axis direction; when moving during the focusing process, there is no relative movement between the lenses in each lens group. In addition, Figure 11A[[END in the first state disclosed, the diaphragm S2 is the aperture of the optical photographing lens group; ​ in the second state disclosed, the diaphragm S3 is the aperture of the optical photographing lens group.

[0318] The first lens E1 has a positive refractive power and is made of glass. Its object-side surface near the optical axis is convex, and its image-side surface near the optical axis is convex, and both are aspherical surfaces. In addition, the image-side surface of the first lens includes two inflection points.

[0319] The second lens E2 has a 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, and both are aspherical surfaces. In addition, the object-side surface of the second lens contains an inflection point.

[0320] The third lens E3 has a 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, and both are aspherical surfaces.

[0321] The fourth lens E4 has a 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, and both are aspherical surfaces. In addition, the object-side surface of the fourth lens contains an inflection point and a convex critical point, and the image-side surface of the fourth lens contains an inflection point and a concave critical point.

[0322] The fifth lens E5 has a 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, and both are aspherical surfaces. In addition, the object-side surface of the fifth lens contains an inflection point, and the image-side surface of the fifth lens contains an inflection point.

[0323] The sixth lens E6 has a 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, and both are aspherical surfaces. In addition, the object-side surface of the sixth lens contains two inflection points, and the image-side surface of the sixth lens contains two inflection points.

[0324] In the sixth embodiment, the reflecting element E8 is disposed between the object and the first lens E1, that is, at the outermost object side of the optical imaging lens group. The reflecting element E8 in the sixth embodiment is a prism and is made of glass.

[0325] The filter element E7 is made of glass and is disposed between the sixth lens E6 and the imaging surface IMG without affecting the focal length of the optical imaging lens group.

[0326] Refer to Table 6A and Table 6B below for further reference.

[0327]

[0328]

[0329]

[0330]

[0331] With reference to Table 6A above, when the sixth embodiment is in the first state and the second state, the corresponding object distances and the values of D0, D1, and D2 in Table 6A are as disclosed in Table 6C below.

[0332]

[0333] In the sixth embodiment, the curve equation of the aspherical surface is expressed in the same form as in the first embodiment. In addition, the definitions of the following table parameters are the same as those in the first embodiment and will not be elaborated here.

[0334] Based on Table 6A, Table 6B, and Table 6C, the data in the following Table 6D can be deduced:

[0335]

[0336]

[0337] <Seventh Embodiment>

[0338] Please refer to ​ , ​ , ​ and ​ , where ​ FIG. shows a schematic diagram of an imaging device 7 according to the seventh embodiment of the present disclosure in a first state, ​ FIG. shows ​ a schematic diagram of the imaging device 7 according to the ​ seventh embodiment in a second state, ​ From left to right in sequence are the spherical aberration, astigmatism, and distortion curves of the ​ seventh embodiment, Figure 13B From left to right in sequence are the spherical aberration, astigmatism, and distortion curves of the seventh embodiment. From Figure 13A and Figure 13B it can be seen that the imaging device 7 of the seventh embodiment includes an optical photography lens group (not otherwise labeled) and an electronic photosensitive element IS. The optical photography lens group sequentially includes a reflection element E8, a diaphragm S1, a first lens E1, a second lens E2, a diaphragm S2, a third lens E3, a diaphragm S3, a fourth lens E4, a diaphragm S4, a fifth lens E5, a sixth lens E6, a filter element E7, and an imaging surface IMG from the object side to the image side of the optical path, and the electronic photosensitive element IS is disposed on the imaging surface IMG of the optical photography lens group. The optical photography lens group includes six lenses (E1, E2, E3, E4, E5, E6), and there are no other interpolated lenses between the six lenses. Furthermore, the optical photography lens group includes two lens groups, which are sequentially the first lens group and the second lens group from the object side to the image side of the optical path, Figure 13A and Figure 13BIn the seventh embodiment shown, the first lens group includes a first lens E1, a second lens E2, and a third lens E3, and the second lens group includes a fourth lens E4, a fifth lens E5, and a sixth lens E6. When the object moves from infinity to a micro object distance, the optical photographic lens unit changes from the first state to the second state. When moving during focusing (i.e., changing from the first state to the second state), the second lens group moves toward the image side along the optical axis with respect to the first lens group; when moving during focusing, there is no relative movement of the lenses in each lens group. Additionally, Figure 13A in the first state disclosed, the aperture stop S2 is the aperture of the optical photographic lens unit; Figure 13B in the second state disclosed, the aperture stop S3 is the aperture of the optical photographic lens unit.

[0339] The first lens E1 has a positive refractive power and is made of glass. Its object-side surface near the optical axis is convex, and its image-side surface near the optical axis is convex, and both are aspherical surfaces. Additionally, the image-side surface of the first lens includes two inflection points and one concave critical point.

[0340] The second lens E2 has a negative refractive power and is made of plastic. Its object-side surface near the optical axis is convex, and its image-side surface near the optical axis is concave, and both are aspherical surfaces. Additionally, the object-side surface of the second lens includes one inflection point.

[0341] The third lens E3 has a positive refractive power and is made of plastic. Its object-side surface near the optical axis is convex, and its image-side surface near the optical axis is convex, and both are aspherical surfaces. Additionally, the object-side surface of the third lens includes two inflection points and one concave critical point.

[0342] The fourth lens E4 has a negative refractive power and is made of plastic. Its object-side surface near the optical axis is concave, and its image-side surface near the optical axis is convex, and both are aspherical surfaces. Additionally, the object-side surface of the fourth lens includes one inflection point and one convex critical point, and the image-side surface of the fourth lens includes one inflection point and one concave critical point.

[0343] The fifth lens E5 has a negative refractive power and is made of plastic. Its object-side surface near the optical axis is convex, and its image-side surface near the optical axis is concave, and both are aspherical surfaces. Additionally, the object-side surface of the fifth lens includes three inflection points, and the image-side surface of the fifth lens includes three inflection points.

[0344] The sixth lens E6 has a negative refractive power and is made of plastic. Its object-side surface near the optical axis is concave, and its image-side surface near the optical axis is convex, and both are aspherical surfaces. Additionally, the object-side surface of the sixth lens includes one inflection point, and the image-side surface of the sixth lens includes two inflection points.

[0345] In the seventh embodiment, a reflecting element E8 is disposed between the object and the first lens E1, i.e., on the most object side of the optical photographic lens unit, and the reflecting element E8 in the seventh embodiment is a prism and is made of glass.

[0346] The filter element E7 is made of glass. It is disposed between the sixth lens E6 and the imaging surface IMG and does not affect the focal length of the optical camera lens group.

[0347] Refer to Table 7A and Table 7B below for further reference.

[0348]

[0349]

[0350]

[0351]

[0352]

[0353] With reference to Table 7A above, in the seventh embodiment, when in the first state and the second state, the corresponding object distances and the values of D0, D1, and D2 in Table 7A are as disclosed in Table 7C below.

[0354]

[0355] In the seventh embodiment, the aspherical curve equation is expressed in the same form as in the first embodiment. In addition, the definitions of the following parameters are the same as those in the first embodiment and will not be elaborated here.

[0356] Based on Table 7A, Table 7B, and Table 7C, the data in Table 7D below can be deduced:

[0357]

[0358]

[0359] <Eighth Embodiment>

[0360] Please refer to Figure 15A , Figure 15B , Figure 16A and Figure 16B , where Figure 15A FIG. shows a schematic diagram of an imaging device 8 in the first state according to the eighth embodiment of the present disclosure. Figure 15B FIG. shows Figure 15A a schematic diagram of the imaging device 8 in the second state according to the Figure 16A eighth embodiment. From left to right, they are Figure 15A the spherical aberration, astigmatism, and distortion curves of the eighth embodiment, Figure 16B and from left to right, they are Figure 15B the spherical aberration, astigmatism, and distortion curves of the eighth embodiment. From Figure 15A and Figure 15BIt can be known that the imaging device 8 of the eighth embodiment includes an optical photography lens group (not labeled separately) and an electronic photosensitive element IS. The optical photography lens group sequentially includes a reflection element E8, a diaphragm S1, a first lens E1, a second lens E2, a diaphragm S2, a third lens E3, a diaphragm S3, a fourth lens E4, a diaphragm S4, a fifth lens E5, a diaphragm S5, a sixth lens E6, a filter element E7, and an imaging surface IMG from the object side to the image side of the optical path. The electronic photosensitive element IS is disposed on the imaging surface IMG of the optical photography lens group. The optical photography lens group includes six lenses (E1, E2, E3, E4, E5, E6), and there are no other interpolated lenses between the six lenses. Furthermore, the optical photography lens group includes two lens groups, which are sequentially the first lens group and the second lens group from the object side to the image side of the optical path, Figure 15A and Figure 15B in the eighth embodiment shown, the first lens group includes the first lens E1, the second lens E2, and the third lens E3, and the second lens group includes the fourth lens E4, the fifth lens E5, and the sixth lens E6. When the object moves from infinity to a micro object distance, the optical photography lens group changes from the first state to the second state. When moving during the focusing process (i.e., changing from the first state to the second state), the second lens group moves toward the image side along the optical axis relative to the first lens group; when moving during the focusing process, there is no relative movement between the lenses in each lens group. In addition, Figure 15A in the first state disclosed, the diaphragm S2 is the aperture of the optical photography lens group; Figure 15B in the second state disclosed, the diaphragm S3 is the aperture of the optical photography lens group.

[0361] The first lens E1 has a positive refractive power and is made of glass. Its object-side surface near the optical axis is convex, and its image-side surface near the optical axis is convex, and both are aspherical surfaces. In addition, the image-side surface of the first lens includes two inflection points.

[0362] The second lens E2 has a negative refractive power and is made of plastic. Its object-side surface near the optical axis is convex, and its image-side surface near the optical axis is concave, and both are aspherical surfaces. In addition, the object-side surface of the second lens includes an inflection point and a concave critical point, and the image-side surface of the second lens includes two inflection points.

[0363] The third lens E3 has a positive refractive power and is made of plastic. Its object-side surface near the optical axis is convex, and its image-side surface near the optical axis is convex, and both are aspherical surfaces. In addition, the object-side surface of the third lens includes two inflection points and a concave critical point.

[0364] The fourth lens E4 has a positive refractive power and is made of plastic. Its object-side surface near the optical axis is concave, and its image-side surface near the optical axis is convex, and both are aspherical surfaces. In addition, the object-side surface of the fourth lens includes an inflection point and a convex critical point, and the image-side surface of the fourth lens includes an inflection point and a concave critical point.

[0365] The fifth lens E5 has a 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, and both are aspherical surfaces. In addition, the object-side surface of the fifth lens includes an inflection point and a concave critical point, and the image-side surface of the fifth lens includes an inflection point.

[0366] The sixth lens E6 has a 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, and both are aspherical surfaces. In addition, the object-side surface of the sixth lens includes an inflection point.

[0367] In the eighth embodiment, the reflecting element E8 is disposed between the object and the first lens E1, that is, on the outermost object side of the optical photographing lens group. The reflecting element E8 in the eighth embodiment is a prism and is made of glass.

[0368] The filter element E7 is made of glass and is disposed between the sixth lens E6 and the imaging surface IMG without affecting the focal length of the optical photographing lens group.

[0369] Refer to Table 8A and Table 8B below for further reference.

[0370]

[0371]

[0372]

[0373]

[0374] With reference to Table 8A above, when the eighth embodiment is in the first state and the second state, the corresponding object distances and the values of D0, D1, and D2 in Table 8A are as disclosed in Table 8C below.

[0375]

[0376] In the eighth embodiment, the aspherical curve equation is expressed in the same form as in the first embodiment. In addition, the definitions of the following parameters are the same as those in the first embodiment and will not be elaborated here.

[0377] Based on Table 8A, Table 8B, and Table 8C, the data in Table 8D below can be calculated:

[0378]

[0379]

[0380] <Ninth Embodiment>

[0381] Please refer to Figure 17A , Figure 17B , Figure 18Aand Figure 18B , wherein Figure 17A FIG. Figure 17A is a schematic diagram showing an imaging device 9 according to a ninth embodiment of the present disclosure in a first state, Figure 17B showing according to Figure 17A a schematic diagram of the imaging device 9 according to the ninth embodiment in a second state, Figure 18A from left to right in sequence are Figure 17A curves of spherical aberration, astigmatism and distortion of the ninth embodiment, Figure 18B from left to right in sequence are Figure 17B curves of spherical aberration, astigmatism and distortion of the ninth embodiment. From Figure 17A and Figure 17B it can be seen that the imaging device 9 according to the ninth embodiment includes an optical photographic lens group (not labeled separately) and an electronic photosensitive element IS. The optical photographic lens group sequentially includes a reflection element E8, a diaphragm S1, a first lens E1, a second lens E2, a diaphragm S2, a third lens E3, a diaphragm S3, a fourth lens E4, a diaphragm S4, a fifth lens E5, a diaphragm S5, a sixth lens E6, a filter element E7 and an imaging surface IMG from the object side to the image side of the optical path, and the electronic photosensitive element IS is disposed on the imaging surface IMG of the optical photographic lens group, wherein the optical photographic lens group includes six lenses (E1, E2, E3, E4, E5, E6), and there are no other interpolated lenses between the six lenses. Furthermore, the optical photographic lens group includes two lens groups, which are sequentially the first lens group and the second lens group from the object side to the image side of the optical path, Figure 17A and Figure 17B in the ninth embodiment shown, the first lens group includes the first lens E1, the second lens E2 and the third lens E3, and the second lens group includes the fourth lens E4, the fifth lens E5 and the sixth lens E6. When the object to be photographed moves from infinity to a micro object distance, the optical photographic lens group changes from the first state to the second state. When moving during the focusing process (i.e., changing from the first state to the second state), relative to the first lens group, the second lens group moves toward the image side along the optical axis direction; when moving during the focusing process, there is no relative movement between the lenses in each lens group. In addition, Figure 17A in the first state disclosed, the diaphragm S2 is the aperture of the optical photographic lens group; Figure 17B in the second state disclosed, the diaphragm S3 is the aperture of the optical photographic lens group.

[0382] The first lens E1 has a positive refractive power and is made of glass. Its object-side surface near the optical axis is convex, and its image-side surface near the optical axis is convex, and both are aspherical surfaces. In addition, the object-side surface of the first lens includes an inflection point, and the image-side surface of the first lens includes two inflection points.

[0383] The second lens E2 has a negative refractive power and is made of plastic. Its object-side surface near the optical axis is convex, and its image-side surface near the optical axis is concave, and both are aspherical surfaces. In addition, the object-side surface of the second lens includes an inflection point.

[0384] The third lens E3 has a positive refractive power and is made of plastic. Its object-side surface near the optical axis is convex, and its image-side surface near the optical axis is convex, and both are aspherical surfaces. In addition, the object-side surface of the third lens includes an inflection point and a concave critical point.

[0385] The fourth lens E4 has a negative refractive power and is made of plastic. Its object-side surface near the optical axis is concave, and its image-side surface near the optical axis is convex, and both are aspherical surfaces. In addition, the object-side surface of the fourth lens includes an inflection point and a convex critical point, and the image-side surface of the fourth lens includes an inflection point and a concave critical point.

[0386] The fifth lens E5 has a negative refractive power and is made of plastic. Its object-side surface near the optical axis is convex, and its image-side surface near the optical axis is concave, and both are aspherical surfaces. In addition, the object-side surface of the fifth lens includes two inflection points and a concave critical point, and the image-side surface of the fifth lens includes four inflection points and a convex critical point.

[0387] The sixth lens E6 has a negative refractive power and is made of plastic. Its object-side surface near the optical axis is concave, and its image-side surface near the optical axis is convex, and both are aspherical surfaces. In addition, the object-side surface of the sixth lens includes an inflection point.

[0388] In the ninth embodiment, the reflection element E8 is disposed between the object and the first lens E1, that is, on the outermost object side of the optical photographic lens group. The reflection element E8 in the ninth embodiment is a prism and is made of glass.

[0389] The filter element E7 is made of glass and is disposed between the sixth lens E6 and the imaging surface IMG without affecting the focal length of the optical photographic lens group.

[0390] Refer to Table 9A and Table 9B below for further reference.

[0391]

[0392]

[0393]

[0394]

[0395] With reference to Table 9A above, in the first state and the second state of the ninth embodiment, the corresponding object distances and the values of D0, D1, and D2 in Table 9A are as disclosed in Table 9C below.

[0396]

[0397] In the ninth embodiment, the curve equation of the aspherical surface is expressed in the same form as in the first embodiment. In addition, the definitions of the following table parameters are the same as those in the first embodiment and will not be elaborated here.

[0398] Based on Table 9A, Table 9B, and Table 9C, the data in the following Table 9D can be deduced:

[0399]

[0400] <Tenth Embodiment>

[0401] Please refer to Figure 19A , Figure 19B , Figure 20A and Figure 20B , where Figure 19A FIG. shows a schematic diagram of an imaging device 10 according to the tenth embodiment of the present disclosure in a first state, Figure 19B FIG. shows Figure 19A a schematic diagram of the imaging device 10 according to the tenth embodiment in a second state, Figure 20A From left to right in sequence are Figure 19A the spherical aberration, astigmatism, and distortion curves of the tenth embodiment, Figure 20B From left to right in sequence are Figure 19B the spherical aberration, astigmatism, and distortion curves of the tenth embodiment. From Figure 19A and Figure 19B it can be seen that the imaging device 10 of the tenth embodiment includes an optical photography lens group (not labeled separately) and an electronic photosensitive element IS. The optical photography lens group includes, in sequence from the object side to the image side of the optical path, a reflection element E8, a diaphragm S1, a first lens E1, a second lens E2, a diaphragm S2, a third lens E3, a diaphragm S3, a fourth lens E4, a diaphragm S4, a fifth lens E5, a sixth lens E6, a diaphragm S5, a filter element E7, and an imaging surface IMG, and the electronic photosensitive element IS is disposed on the imaging surface IMG of the optical photography lens group, where the optical photography lens group includes six lenses (E1, E2, E3, E4, E5, E6), and there are no other interpolated lenses between the six lenses. Furthermore, the optical photography lens group includes two lens groups, which are, in sequence from the object side to the image side of the optical path, the first lens group and the second lens group, Figure 19A and Figure 19B In the tenth embodiment shown, the first lens group includes the first lens E1, the second lens E2, and the third lens E3, and the second lens group includes the fourth lens E4, the fifth lens E5, and the sixth lens E6. When the object to be photographed moves from infinity to a micro object distance, the optical photography lens group changes from the first state to the second state. When moving for focusing (i.e., changing from the first state to the second state), the second lens group moves toward the image side along the optical axis direction relative to the first lens group; when moving for focusing, there is no relative movement between the lenses in each lens group. In addition, Figure 19AIn the first state disclosed, the diaphragm S2 is the aperture of the optical photography lens group; Figure 19B In the second state disclosed, the diaphragm S3 is the aperture of the optical photography lens group.

[0402] The first lens E1 has a positive refractive power and is made of glass. Its object-side surface near the optical axis is convex, and its image-side surface near the optical axis is concave, and both are aspherical surfaces. In addition, the image-side surface of the first lens includes an inflection point.

[0403] The second lens E2 has a negative refractive power and is made of plastic. Its object-side surface near the optical axis is convex, and its image-side surface near the optical axis is concave, and both are aspherical surfaces. In addition, the object-side surface of the second lens includes an inflection point and a concave critical point, and the image-side surface of the second lens includes two inflection points.

[0404] The third lens E3 has a positive refractive power and is made of plastic. Its object-side surface near the optical axis is convex, and its image-side surface near the optical axis is convex, and both are aspherical surfaces. In addition, the object-side surface of the third lens includes an inflection point and a concave critical point.

[0405] The fourth lens E4 has a negative refractive power and is made of plastic. Its object-side surface near the optical axis is concave, and its image-side surface near the optical axis is convex, and both are aspherical surfaces. In addition, the object-side surface of the fourth lens includes an inflection point and a convex critical point, and the image-side surface of the fourth lens includes an inflection point and a concave critical point.

[0406] The fifth lens E5 has a positive refractive power and is made of plastic. Its object-side surface near the optical axis is convex, and its image-side surface near the optical axis is concave, and both are aspherical surfaces. In addition, the object-side surface of the fifth lens includes three inflection points, and the image-side surface of the fifth lens includes three inflection points and a convex critical point.

[0407] The sixth lens E6 has a negative refractive power and is made of plastic. Its object-side surface near the optical axis is concave, and its image-side surface near the optical axis is convex, and both are aspherical surfaces. In addition, the object-side surface of the sixth lens includes an inflection point, and the image-side surface of the sixth lens includes two inflection points.

[0408] In the tenth embodiment, the reflecting element E8 is disposed between the object to be photographed and the first lens E1, that is, on the outermost object side of the optical photography lens group, and the reflecting element E8 in the tenth embodiment is a reflecting mirror.

[0409] The filter element E7 is made of glass and is disposed between the sixth lens E6 and the imaging surface IMG without affecting the focal length of the optical photography lens group.

[0410] Refer to Table 10A and Table 10B below for further reference.

[0411]

[0412]

[0413]

[0414]

[0415] With reference to Table 10A above, in the tenth embodiment, in the first state and the second state, the corresponding object distances and the values of D0, D1, and D2 in Table 10A are as disclosed in Table 10C below.

[0416]

[0417]

[0418] In the tenth embodiment, the aspheric curve equation is expressed in the same form as in the first embodiment. In addition, the definitions of the following table parameters are the same as those in the first embodiment and will not be elaborated here.

[0419] Based on Tables 10A, 10B, and 10C, the data in the following Table 10D can be deduced:

[0420]

[0421] <Eleventh Embodiment>

[0422] Please refer to Figure 24 , which shows a perspective view of an imaging device 100 according to the eleventh embodiment of the present disclosure. As can be seen from Figure 24 , the imaging device 100 of the eleventh embodiment is a camera module. The imaging device 100 includes an imaging lens 101, a driving device group 102, and an electronic photosensitive element 103. The imaging lens 101 includes the optical photographic lens group of the present disclosure and a lens barrel (not labeled separately) for carrying the optical photographic lens group. The imaging device 100 uses the imaging lens 101 to converge light, photograph an object to be photographed, and perform image focusing in cooperation with the driving device group 102. Finally, the image is formed on the electronic photosensitive element 103, and the image data is output.

[0423] The driving device group 102 can be an autofocus module, and its driving method can use driving systems such as voice coil motors, microelectromechanical systems, piezoelectric systems, or shape memory alloys. The driving device group 102 can enable the optical photographic lens group to obtain a better imaging position, and can provide clear images for the object to be photographed in different object distance states.

[0424] The imaging device 100 can be equipped with an electronic photosensitive element 103 (such as CMOS, CCD) with good sensitivity and low noise, which is arranged on the imaging surface of the optical photography lens group, and can truly present the good imaging quality of the optical photography lens group. In addition, the imaging device 100 can further include an image stabilization module 104, which can be a kinetic sensing element such as an accelerometer, a gyroscope or a Hall Effect Sensor. In the eleventh embodiment, the image stabilization module 104 is a gyroscope, but not limited thereto. By adjusting the changes in different axes of the optical photography lens group to compensate for the blurred images caused by shaking during shooting, the imaging quality of dynamic and low-light scenes is further improved, and advanced image compensation functions such as Optical Image Stabilization (OIS) and Electronic Image Stabilization (EIS) are provided.

[0425] <The twelfth embodiment>

[0426] Please refer to Figure 25A 、 Figure 25B and Figure 25C where Figure 25A shows a schematic diagram of one side of an electronic device 200 according to the twelfth embodiment of the present disclosure, Figure 25B shows according to Figure 25A a schematic diagram of the other side of the electronic device 200 in Figure 25C shows according to Figure 25A the system schematic diagram of the electronic device 200 in Figure 25A 、 Figure 25B and Figure 25CIt can be seen that the electronic device 200 of the twelfth embodiment is a smart phone. The electronic device 200 includes imaging devices 100, 110, 120, 130, 140, a flash module 201, a focus assist module 202, an image signal processor 203 (Image Signal Processor; ISP), a user interface 204, and an image software processor 205, wherein the imaging devices 120, 130, 140 are front cameras. When the user takes a picture of the subject 206 through the user interface 204, the electronic device 200 uses the imaging devices 100, 110, 120, 130, 140 to collect light and take an image, activates the flash module 201 for fill light, and uses the subject distance information provided by the focus assist module 202 for rapid focusing. In addition, the image signal processor 203 and the image software processor 205 perform image optimization processing to further improve the image quality generated by the optical camera module. The focus assist module 202 can use an infrared or laser focus assist system to achieve rapid focusing. The user interface 204 can use a touch screen or a physical shooting button, and cooperate with the diverse functions of the image processing software for image shooting and image processing.

[0427] At least one of the imaging devices 100, 110, 120, 130, 140 in the twelfth embodiment may include the optical camera module of the present disclosure, and may be the same as or have a similar structure to the imaging device 100 in the foregoing eleventh embodiment, which will not be described herein again. Specifically, the imaging devices 100, 110 in the twelfth embodiment may be a wide-angle imaging device and an ultra-wide-angle imaging device respectively, or may be a wide-angle imaging device and a telephoto imaging device respectively, and the imaging devices 120, 130, 140 may be a wide-angle imaging device, an ultra-wide-angle imaging device, and a TOF module (Time-Of-Flight; time-of-flight ranging module) respectively, but are not limited to this configuration. In addition, the connection relationships between the imaging devices 110, 120, 130, 140 and other components may be the same as those of the imaging device 100 shown in Figure 25C or be adaptively adjusted according to the type of the imaging device, which will not be shown and described in detail herein.

[0428] <The Thirteenth Embodiment>

[0429] Please refer to Figure 26 , which shows a schematic diagram of one side of an electronic device 300 according to the thirteenth embodiment of the present disclosure. The electronic device 300 of the thirteenth embodiment is a smart phone. The electronic device 300 includes imaging devices 310, 320, 330, and a flash module 301.

[0430] The electronic device 300 of the thirteenth embodiment may include elements that are the same as or similar to those in the aforementioned twelfth embodiment, and the connection relationships between the imaging devices 310, 320, 330 and other elements may also be the same as or similar to those disclosed in the twelfth embodiment, which will not be elaborated herein. The imaging devices 310, 320, 330 in the thirteenth embodiment may all include the optical photography lens group of the present disclosure, and may all be the same as or have a similar structure to the imaging device 100 in the aforementioned eleventh embodiment, which will not be elaborated herein. Specifically, the imaging device 310 may be an ultra-wide-angle imaging device, the imaging device 320 may be a wide-angle imaging device, the imaging device 330 may be a telephoto imaging device (which may include an optical path turning element), or may alternatively be other types of imaging devices, and is not limited to this configuration.

[0431] <The fourteenth embodiment>

[0432] Please refer to Figure 27 , which shows a schematic diagram of one side of an electronic device 400 according to the fourteenth embodiment of the present disclosure. The electronic device 400 of the fourteenth embodiment is a smart phone, and the electronic device 400 includes imaging devices 410, 420, 430, 440, 450, 460, 470, 480, 490 and a flash module 401.

[0433] The electronic device 400 of the fourteenth embodiment may include elements that are the same as or similar to those in the aforementioned twelfth embodiment, and the connection relationships between the imaging devices 410, 420, 430, 440, 450, 460, 470, 480, 490 and the flash module 401 and other elements may also be the same as or similar to those disclosed in the twelfth embodiment, which will not be elaborated herein. The imaging devices 410, 420, 430, 440, 450, 460, 470, 480, 490 in the fourteenth embodiment may all include the optical photography lens group of the present disclosure, and may all be the same as or have a similar structure to the imaging device 100 in the aforementioned eleventh embodiment, which will not be elaborated herein.

[0434] Specifically, the imaging devices 410, 420 may be ultra-wide-angle imaging devices respectively, the imaging devices 430, 440 may be wide-angle imaging devices respectively, the imaging devices 450, 460 may be telephoto imaging devices respectively, the imaging devices 470, 480 may be telephoto imaging devices (which may include an optical path turning element) respectively, the imaging device 490 may be a TOF module, or may alternatively be other types of imaging devices, and is not limited to this configuration.

[0435] <The fifteenth embodiment>

[0436] Please refer to Figure 28A and Figure 28B , wherein Figure 28ASchematic diagram showing one side of an electronic device 500 according to the fifteenth embodiment of the present disclosure. Figure 28B Showing according to Figure 28A a schematic diagram of the other side of the electronic device 500 in. From Figure 28A and Figure 28B it can be seen that the electronic device 500 of the fifteenth embodiment is a smart phone, and the electronic device 500 includes imaging devices 510, 520, 530, 540 and a user interface 504.

[0437] The electronic device 500 of the fifteenth embodiment may include elements that are the same as or similar to those in the aforementioned twelfth embodiment, and the connection relationships between the imaging devices 510, 520, 530, 540 and other elements may also be the same as or similar to those disclosed in the twelfth embodiment, which will not be elaborated herein. Specifically, the imaging device 510 may capture images corresponding to a non-circular opening outside the electronic device, and the imaging devices 520, 530, 540 are a telephoto imaging device, a wide-angle imaging device, and an ultra-wide-angle imaging device respectively, or may alternatively be other types of imaging devices, and are not limited to this configuration.

[0438] Although the present disclosure has been disclosed as above in embodiments, it is not intended to limit the present disclosure. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to that defined by the appended claims.

Claims

1. An optical photographic lens group, characterized in that, It includes six lenses in sequence from the object side to the image side of an optical path, and the six lenses are, from the object side to the image side: A first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens; each of the lenses has an object-side surface facing the object side and an image-side surface facing the image side; Wherein the first lens has a positive refractive power, and its object-side surface is convex near the optical axis; The second lens has a negative refractive power, its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis; The third lens has a positive refractive power, and its image-side surface is convex near the optical axis; At least one of the first lens to the sixth lens includes at least one inflection point; Wherein the maximum viewing angle of the optical imaging lens group at an infinite object distance is FOVL, the focal length of the second lens is f2, the focal length of the third lens is f3, the focal length of the sixth lens is f6, the thickness of the second lens on the optical axis is CT2, the thickness of the third lens on the optical axis is CT3, the thickness of the fourth lens on the optical axis is CT4, the thickness of the fifth lens on the optical axis is CT5, the distance between the fifth lens and the sixth lens on the optical axis of the optical imaging lens group at an infinite object distance is T56L, the radius of curvature of the object-side surface of the second lens is R3, the radius of curvature of the image-side surface of the second lens is R4, and it satisfies the following conditions: 10.0 < FOVL < 55.0; 0 < |f3 / f6| < 0.75; 0 < (CT4 + CT5) / T56L < 0.90; 4.50 < |f2 / R3| + |f2 / R4| < 18.00; and 0.05 < CT2 / CT3 < 0.

75.

2. The optical photographic lens group according to claim 1, characterized in that, The object-side surface of the fifth lens is convex near the optical axis; the image-side surface of the sixth lens is convex near the optical axis; the distance on the optical axis from the object-side surface of the first lens to the image-side surface of the third lens of the optical imaging lens group at an infinite object distance is Dr1r6L, and the distance on the optical axis from the object-side surface of the fourth lens to the image-side surface of the sixth lens of the optical imaging lens group at an infinite object distance is Dr7r12L, and it satisfies the following conditions: 1.00 < Dr1r6L / Dr7r12L < 2.

00.

3. The optical photographic lens group according to claim 1, wherein, At least one of the object-side surface and the image-side surface of the fourth lens includes at least one critical point; the maximum viewing angle of the optical imaging lens group at an infinite object distance is FOVL, and it satisfies the following conditions: 20.0 < FOVL < 45.

0.

4. The optical photography lens group according to claim 1, characterized in that, The object-side surface of the fourth lens includes at least one convex critical point, and at least one of the first lens to the sixth lens is made of glass.

5. The optical photographic lens group according to claim 1, wherein, The radius of curvature of the object-side surface of the second lens is R3, the radius of curvature of the image-side surface of the second lens is R4, and it satisfies the following conditions: 0 < (R3 - R4) / (R3 + R4) < 0.

50.

6. The optical photographic lens group according to claim 1, wherein, The radius of curvature of the object-side surface of the first lens is R1, the radius of curvature of the image-side surface of the second lens is R4, the radius of curvature of the object-side surface of the third lens is R5, the radius of curvature of the image-side surface of the third lens is R6, and it satisfies the following conditions: 0.10 < R4 / R1 < 0.70; and -0.20 < (R5 + R6) / (R5 - R6) < 2.

00.

7. The optical photographic lens group according to claim 1, wherein, The thickness of the first lens on the optical axis is CT1, and the distance between the second lens and the third lens on the optical axis of the optical photographic lens group at an infinite object distance is T23L, which satisfies the following condition: 0.35 < CT1 / T23L < 1.

70.

8. The optical photography lens group according to claim 1, characterized in that, The distance from the image-side surface of the lens closest to the image side of the optical photographic lens group at an infinite object distance to an imaging plane on the optical axis is BLL, and the maximum image height of the optical photographic lens group is ImgH, which satisfies the following condition: 0.50 < BLL / ImgH < 1.

10.

9. The optical photographic lens group according to claim 1, characterized in that, The thickness of the third lens on the optical axis is CT3, and the thickness of the sixth lens on the optical axis is CT6. The displacement parallel to the optical axis from the intersection point of the object-side surface of the third lens of the optical photographic lens group at an infinite object distance to the maximum effective radius position of the object-side surface of the third lens is Sag3R1L, and the displacement parallel to the optical axis from the intersection point of the image-side surface of the sixth lens of the optical photographic lens group at an infinite object distance to the maximum effective radius position of the image-side surface of the sixth lens is Sag6R2L, which satisfies the following conditions: 0 < |Sag3R1L| / CT3 < 0.30; and 0.60 < |Sag6R2L| / CT6 < 5.

00.

10. The optical photographic lens group according to claim 1, characterized in that, The maximum effective radius position of the object-side surface of the first lens of the optical photographic lens group at an infinite object distance is Y1R1L, and the maximum effective radius position of the image-side surface of the sixth lens of the optical photographic lens group at an infinite object distance is Y6R2L, which satisfies the following condition: 0.80 < Y1R1L / Y6R2L < 1.

30.

11. The optical photographic lens group according to claim 1, characterized in that, It further includes: A reflection element located between an object to be photographed and the first lens.

12. An imaging device, characterized in that, It includes: The optical photographic lens group according to claim 1; and An electronic photosensitive element disposed on an imaging plane of the optical photographic lens group.

13. An electronic device, characterized in that, It includes: The imaging device according to claim 12.

14. An optical photographic lens group, characterized in that, It sequentially includes six lenses from the object side to the image side of an optical path, and the six lenses from the object side to the image side are: A first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens; each of the lenses has an object-side surface facing the object side and an image-side surface facing the image side; Wherein the first lens has a positive refractive power, and its object-side surface near the optical axis is a convex surface; The second lens has a negative refractive power, its object-side surface near the optical axis is a convex surface, and its image-side surface near the optical axis is a concave surface; The third lens has a positive refractive power, and its image-side surface near the optical axis is a convex surface; At least one of the first lens to the sixth lens includes at least one inflection point; Wherein, the maximum viewing angle of the optical photography lens group at an infinite object distance is FOVL, the focal length of the third lens is f3, the focal length of the sixth lens is f6, the thickness of the fourth lens on the optical axis is CT4, the thickness of the fifth lens on the optical axis is CT5, the axial interval distance between the second lens and the third lens of the optical photography lens group at an infinite object distance is T23L, the axial interval distance between the fifth lens and the sixth lens of the optical photography lens group at an infinite object distance is T56L, the radius of curvature of the image side surface of the first lens is R2, and the radius of curvature of the object side surface of the second lens is R3, which satisfy the following conditions: 10.0 < FOVL < 55.0; 0 < |f3 / f6| < 0.75; 0 < (CT4 + CT5) / T56L < 0.90; 0.15 < (R2 + R3) / (R2 - R3) < 5.00; and 0.05 < CT4 / T23L < 0.

75.

15. The optical photographic lens group according to claim 14, wherein The radius of curvature of the image side surface of the first lens is R2, the radius of curvature of the object side surface of the second lens is R3, the radius of curvature of the object side surface of the third lens is R5, and the radius of curvature of the image side surface of the third lens is R6, which satisfy the following conditions: -0.10 < (R5 + R6) / (R5 - R6) < 1.25; and 0.20 < (R2 + R3) / (R2 - R3) < 3.

00.

16. The optical photographic lens group according to claim 14, wherein, The sixth lens has a negative refractive power; the focal length of the third lens is f3, and the focal length of the fifth lens is f5, which satisfy the following conditions: 0.01 < |f3 / f5| < 0.

80.

17. The optical photographic lens group according to claim 14, characterized in that, The object side surface of the fourth lens near the optical axis is concave; the image side surface of the sixth lens near the optical axis is convex; the axial distance from the object side surface of the first lens of the optical photography lens group at an infinite object distance to an imaging surface is TLL, and the axial distance from the object side surface of the first lens of the optical photography lens group at an infinite object distance to the image side surface of the third lens is Dr1r6L, which satisfy the following conditions: 1.00 < TLL / Dr1r6L < 3.

50.

18. The optical photographic lens group according to claim 14, characterized in that, The thickness of the third lens on the optical axis is CT3, the thickness of the fourth lens on the optical axis is CT4, the thickness of the fifth lens on the optical axis is CT5, and the axial interval distance between the fourth lens and the fifth lens of the optical photography lens group at an infinite object distance is T45L, which satisfy the following conditions: 0.80 < CT3 / (CT4 + T45L + CT5) < 3.

00.

19. The optical photographic lens group according to claim 14, characterized in that, The axial interval distance between the second lens and the third lens of the optical photography lens group at an infinite object distance is T23L, and the axial interval distance between the fourth lens and the fifth lens of the optical photography lens group at an infinite object distance is T45L, which satisfy the following conditions: 0.01 < T45L / T23L < 0.

50.

20. The optical photography lens group according to claim 14, wherein The Abbe number of the fourth lens is V4, and the Abbe number of the sixth lens is V6, which satisfy the following conditions: 90.0 < V4 + V6 < 130.

0.

21. The optical photographic lens group according to claim 14, wherein, The thickness of the first lens on the optical axis is CT1, and the thickness of the third lens on the optical axis is CT3, which satisfy the following conditions: 0.10 < CT1 / CT3 < 1.

20.

22. The optical photographic lens group according to claim 14, wherein, The maximum viewing angle of the optical photographic lens group at an infinite object distance is FOVL, the focal length of the second lens is f2, the focal length of the third lens is f3, the focal length of the sixth lens is f6, the thickness of the second lens on the optical axis is CT2, the thickness of the third lens on the optical axis is CT3, the thickness of the fourth lens on the optical axis is CT4, the thickness of the fifth lens on the optical axis is CT5, the axial interval distance between the second lens and the third lens of the optical photographic lens group at an infinite object distance is T23L, the axial interval distance between the fifth lens and the sixth lens of the optical photographic lens group at an infinite object distance is T56L, the radius of curvature of the image-side surface of the first lens is R2, the radius of curvature of the object-side surface of the second lens is R3, and the radius of curvature of the image-side surface of the second lens is R4, which satisfy the following conditions: 33.6 ≤ FOVL ≤ 35.6; 0.08 ≤ |f3 / f6| ≤ 0.60; 0.28 ≤ (CT4 + CT5) / T56L ≤ 0.63; 6.09 ≤ |f2 / R3| + |f2 / R4| ≤ 12.09; 0.19 ≤ CT2 / CT3 ≤ 0.53; 0.40 ≤ (R2 + R3) / (R2 - R3) ≤ 1.83; and 0.17 ≤ CT4 / T23L ≤ 0.

59.

23. An optical photographic lens group, characterized in that, It includes two lens groups, the two lens groups include six lenses, and the two lens groups are, in order from the object side to the image side of an optical path: A first lens group and a second lens group; Among them, the six lenses are, from the object side to the image side of the optical path, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens; each of the lenses has an object-side surface facing the object side and an image-side surface facing the image side; Among them, when a subject moves from infinity to a close object distance, the optical photographic lens group changes from a first state to a second state; when moving for focusing, relative to the first lens group, the second lens group moves toward the image side along an optical axis direction; when moving for focusing, there is no relative movement between the lenses in each lens group; Among them, the first lens group includes the first lens, the second lens, and the third lens; the second lens group includes the fourth lens, the fifth lens, and the sixth lens; Among them, the first lens has a positive refractive power; at least one of the first lens to the sixth lens includes at least one inflection point; Wherein the thickness of the first lens on the optical axis is CT1, the thickness of the third lens on the optical axis is CT3, the thickness of the fourth lens on the optical axis is CT4, the thickness of the fifth lens on the optical axis is CT5, the distance between the fifth lens and the sixth lens on the optical axis of the optical photographic lens group at an infinite object distance is T56L, the distance from the object side surface of the first lens of the optical photographic lens group at an infinite object distance to an imaging surface on the optical axis is TLL, the distance from the object side surface of the first lens of the optical photographic lens group at an infinite object distance to the image side surface of the third lens on the optical axis is Dr1r6L, and the distance from the object side surface of the first lens of the optical photographic lens group at a micro object distance to the imaging surface on the optical axis is TLS, which satisfy the following conditions: 0.10 < (CT4 + CT5) / T56L < 1.50; 0.10 < CT1 / CT3 < 1.80; 1.00 < TLL / Dr1r6L < 3.00; and 0.90 < TLL / TLS < 1.

10.

24. The optical photographic lens group according to claim 23, wherein The second lens has a negative refractive power; the image side surface of the sixth lens near the optical axis is convex.

25. The optical photographic lens group according to claim 23, wherein, The distance between the first lens group and the second lens group of the optical photographic lens group on the optical axis at an infinite object distance is TG1G2L, and the distance between the first lens group and the second lens group of the optical photographic lens group on the optical axis at a micro object distance is TG1G2S, which satisfy the following conditions: 2.20 < (TG1G2S - TG1G2L) / TG1G2L < 6.

00.

26. The optical photography lens group according to claim 23, wherein, The thickness of the first lens on the optical axis is CT1, and the distance between the second lens and the third lens of the optical photographic lens group on the optical axis at an infinite object distance is T23L, which satisfy the following conditions: 0.10 < CT1 / T23L < 1.

70.

27. The optical photographic lens group according to claim 23, wherein, The distance from the image side surface of the lens closest to the image side of the optical photographic lens group at an infinite object distance to the imaging surface on the optical axis is BLL, and the distance from the image side surface of the lens closest to the image side of the optical photographic lens group at a micro object distance to the imaging surface on the optical axis is BLS, which satisfy the following conditions: 1.50 < BLL / BLS < 3.

00.

28. The optical photographic lens group according to claim 23, wherein The thickness of the sixth lens on the optical axis is CT6, and the distance between the fifth lens and the sixth lens of the optical photographic lens group on the optical axis at an infinite object distance is T56L, which satisfy the following conditions: 0.01 < CT6 / T56L < 1.

00.

29. The optical photographic lens group according to claim 23, wherein The thickness of the first lens on the optical axis is CT1, the thickness of the third lens on the optical axis is CT3, the thickness of the fourth lens on the optical axis is CT4, the thickness of the fifth lens on the optical axis is CT5, the distance between the fifth lens and the sixth lens on the optical axis of the optical photographic lens group at an infinite object distance is T56L, the distance from the object side surface of the first lens to the imaging surface on the optical axis of the optical photographic lens group at an infinite object distance is TLL, the distance from the object side surface of the first lens to the image side surface of the third lens on the optical axis of the optical photographic lens group at an infinite object distance is Dr1r6L, and the distance from the object side surface of the first lens to the imaging surface on the optical axis of the optical photographic lens group at a micro object distance is TLS, which satisfy the following conditions: 0.28 ≤ (CT4 + CT5) / T56L ≤ 0.63; 0.55 ≤ CT1 / CT3 ≤ 0.90; 2.15 ≤ TLL / Dr1r6L ≤ 2.30; and TLL / TLS = 1.00.

Images