Photographing lens group, image capturing device and electronic device

Abstract

The invention discloses a photographing lens group which comprises six lenses. The six lenses are sequentially 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 along an optical path. Each of the six lenses has an object-side surface facing the object-side direction and an image-side surface facing the image-side direction. The first lens element has an object-side surface being convex in a paraxial region thereof. The second lens element has an object-side surface being convex in a paraxial region thereof. The fifth lens element with negative refractive power has an object-side surface being concave in a paraxial region thereof and an image-side surface being convex in a paraxial region thereof. The sixth lens element has an image-side surface having an inflection point. The photographing lens group further comprises an aperture arranged between the second lens and the third lens. When specific conditions are met, the photographing lens group can meet the requirements of wide viewing angle, miniaturization and high imaging quality at the same time. The invention further discloses an image capturing device with the photographing lens group and an electronic device with the image capturing device.

Description

Technical Field

[0001] The present disclosure relates to a photographic lens group, an imaging device, and an electronic device, and particularly to a photographic lens group and an imaging device suitable for an electronic device. Background Art

[0002] With the more refined semiconductor process technology, the performance of electronic photosensitive elements has been improved, and the pixel size can reach a smaller size. Therefore, an optical lens with high imaging quality has become an indispensable part.

[0003] With the rapid development of technology, the application range 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 existing 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 requirements. Summary of the Invention

[0004] The present disclosure provides a photographic lens group, an imaging device, and an electronic device. Among them, the photographic lens group includes six lenses arranged in sequence along the optical path from the object side to the image side. When specific conditions are met, the photographic lens group provided by the present disclosure can simultaneously meet the requirements of wide viewing angle, miniaturization, and high imaging quality.

[0005] The present disclosure provides a photographic lens group including six lenses. The six lenses are, in sequence from the object side to the image side along the optical path, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The six lenses respectively have an object side surface facing the object side direction and an image side surface facing the image side direction. Preferably, the object side surface of the first lens is convex near the optical axis. Preferably, the object side surface of the second lens is convex near the optical axis. Preferably, the fifth lens has a negative refractive power. Preferably, the object side surface of the fifth lens is concave near the optical axis. Preferably, the image side surface of the fifth lens is convex near the optical axis. Preferably, the image side surface of the sixth lens has at least one inflection point. Preferably, the photographic lens group further includes an aperture, and the aperture is disposed between the second lens and the third lens. The distance from the object side surface of the first lens to the imaging surface on the optical axis is TL, the focal length of the photographic lens group is f, the focal length of the second lens is f2, the focal length of the sixth lens is f6, and the maximum viewing angle in the photographic lens group is FOV, which preferably satisfies the following conditions:

[0006] 2.80 < TL / f < 5.50;

[0007] 1.10 < |f2 / f6| < 25.00; and

[0008] 105.0 degrees < FOV < 145.0 degrees.

[0009] The present disclosure further provides a photographic lens group including six lenses. The six lenses are, in order from the object side to the image side along the optical path, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The six lenses respectively have an object-side surface facing the object side and an image-side surface facing the image side. Preferably, the object-side surface of the second lens is convex near the optical axis. Preferably, the image-side surface of the sixth lens has at least one inflection point. The distance from the object-side surface of the first lens to the imaging surface on the optical axis is TL, the focal length of the photographic lens group is f, the focal length of the first lens is f1, the focal length of the second lens is f2, the focal length of the third lens is f3, the focal length of the fifth lens is f5, the focal length of the sixth lens is f6, the radius of curvature of the object-side surface of the first lens is R1, 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 fifth lens is R9, the radius of curvature of the image-side surface of the fifth lens is R10, the radius of curvature of the object-side surface of the sixth lens is R11, and the radius of curvature of the image-side surface of the sixth lens is R12, which preferably satisfy the following conditions:

[0010] 2.00 < TL / f < 5.40;

[0011] (R9 + R10) / (R9 - R10) < -1.60;

[0012] 0.85 < (|f1| + |f2|) / |f5| < 10.50;

[0013] (R11 + R12) / (R11 - R12) < -0.55;

[0014] 1.70 < (|f2| + |f3|) / (|f1| + |f6|); and

[0015] -0.15 < R3 / R1.

[0016] The present disclosure further provides a photographic lens group including six lenses. The six lenses are, in order from the object side to the image side along the optical path, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The six lenses respectively have an object-side surface facing the object side and an image-side surface facing the image side. Preferably, the object-side surface of the second lens is convex near the optical axis. Preferably, the image-side surface of the sixth lens has at least one inflection point. The distance from the object-side surface of the first lens to the imaging surface on the optical axis is TL, the focal length of the photographic lens group is f, the focal length of the first lens is f1, the focal length of the second lens is f2, the focal length of the fifth lens is f5, the radius of curvature of the object-side surface of the first lens is R1, the radius of curvature of the object-side surface of the fifth lens is R9, the radius of curvature of the image-side surface of the fifth lens is R10, the interval distance between the fourth lens and the fifth lens on the optical axis is T45, and the interval distance between the fifth lens and the sixth lens on the optical axis is T56, which preferably satisfy the following conditions:

[0017] 3.00 < TL / f < 5.40;

[0018] (R9 + R10) / (R9 - R10) < -1.90;

[0019] 0.85 < (|f1| + |f2|) / |f5| < 10.50;

[0020] 1.80 < |f2 / f1| < 25.00;

[0021] 0 < T56 / T45 < 2.30; and

[0022] -0.10 < f / R1.

[0023] The present disclosure provides an imaging device, which includes the aforementioned photographic lens group and an electronic photosensitive element, wherein the electronic photosensitive element is disposed on the imaging surface of the photographic lens group.

[0024] The present disclosure provides an electronic device, which includes the aforementioned imaging device.

[0025] When TL / f satisfies the above conditions, it helps to achieve a balance between the total length and the viewing angle.

[0026] When |f2 / f6| satisfies the above conditions, the refractive power ratio relationship between the second lens and the sixth lens can be adjusted to correct spherical aberration and astigmatism.

[0027] When FOV satisfies the above conditions, it helps to standardize the viewing angle specifications and avoid aberrations such as distortion caused by an excessive viewing angle.

[0028] When (R9 + R10) / (R9 - R10) satisfies the above conditions, the curvature radius of the object side surface of the fifth lens and the curvature radius of the image side surface of the fifth lens can be effectively balanced, and the outgoing direction of light rays from the fifth lens can be adjusted, which helps to increase the imaging surface.

[0029] When (|f1| + |f2|) / |f5| satisfies the above conditions, the refractive powers of the first lens, the second lens and the fifth lens can be adjusted, which helps to balance the convergence or divergence of incident light rays with a large viewing angle and improve the light condensing quality of the entire field of view.

[0030] When (R11 + R12) / (R11 - R12) satisfies the above conditions, by adjusting the curvature radius of the object side surface of the sixth lens and the curvature radius of the image side surface of the sixth lens, the image surface curvature and distortion can be improved to correct the imaging quality.

[0031] When (|f2| + |f3|) / (|f1| + |f6|) satisfies the above conditions, it helps to adjust the optical path and balance the refractive power distribution of the photographic lens group.

[0032] When R3 / R1 satisfies the above conditions, the surface shapes of the first lens and the second lens can be mutually coordinated to correct aberrations.

[0033] When |f2 / f1| satisfies the above conditions, the refractive powers of the first lens and the second lens can be effectively balanced, which helps to broaden the shooting field of view and correct off-axis aberrations.

[0034] When T56 / T45 satisfies the above conditions, the position of the fifth lens can be adjusted in coordination with the surface shape design of the fifth lens to effectively avoid the phenomenon of total reflection.

[0035] When f / R1 satisfies the above conditions, the curvature of the surface of the object side of the first lens can be regulated, which helps to cooperate with the light collection of a large viewing angle.

[0036] The above description of the present disclosure and the following description of the embodiments are used to demonstrate and explain the spirit and principle of the present disclosure, and to provide a further explanation of the claims of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 Schematic diagram of an imaging device according to the first embodiment of the present disclosure.

[0038] Figure 2 From left to right are the spherical aberration, astigmatism, and distortion curves of the first embodiment.

[0039] Figure 3 Schematic diagram of an imaging device according to the second embodiment of the present disclosure.

[0040] Figure 4 From left to right are the spherical aberration, astigmatism, and distortion curves of the second embodiment.

[0041] Figure 5 Schematic diagram of an imaging device according to the third embodiment of the present disclosure.

[0042] Figure 6 From left to right are the spherical aberration, astigmatism, and distortion curves of the third embodiment.

[0043] Figure 7 Schematic diagram of an imaging device according to the fourth embodiment of the present disclosure.

[0044] Figure 8 From left to right are the spherical aberration, astigmatism, and distortion curves of the fourth embodiment.

[0045] Figure 9 Schematic diagram of an imaging device according to the fifth embodiment of the present disclosure.

[0046] Figure 10 From left to right are the spherical aberration, astigmatism, and distortion curves of the fifth embodiment.

[0047] Figure 11 Schematic diagram of an imaging device according to the sixth embodiment of the present disclosure.

[0048] Figure 12 From left to right are the spherical aberration, astigmatism, and distortion curves of the sixth embodiment in sequence.

[0049] Figure 13 Schematic diagram of an imaging device according to the seventh embodiment of the present disclosure.

[0050] Figure 14 From left to right are the spherical aberration, astigmatism, and distortion curves of the seventh embodiment in sequence.

[0051] Figure 15 Schematic diagram of an imaging device according to the eighth embodiment of the present disclosure.

[0052] Figure 16 From left to right are the spherical aberration, astigmatism, and distortion curves of the eighth embodiment in sequence.

[0053] Figure 17 Schematic diagram of an imaging device according to the ninth embodiment of the present disclosure.

[0054] Figure 18 From left to right are the spherical aberration, astigmatism, and distortion curves of the ninth embodiment in sequence.

[0055] Figure 19 Schematic perspective view of an imaging device according to the tenth embodiment of the present disclosure.

[0056] Figure 20 Schematic perspective view of one side of an electronic device according to the eleventh embodiment of the present disclosure.

[0057] Figure 21 Shows Figure 20 Schematic perspective view of the other side of the electronic device.

[0058] Figure 22 Schematic perspective view of one side of an electronic device according to the twelfth embodiment of the present disclosure.

[0059] Figure 23 Shows Figure 22 Schematic perspective view of the other side of the electronic device.

[0060] Figure 24 Shows Figure 22 System block diagram of the electronic device.

[0061] Figure 25 Schematic perspective view of one side of an electronic device according to the thirteenth embodiment of the present disclosure.

[0062] Figure 26 A perspective view showing one side of an electronic device according to the fourteenth embodiment of the present disclosure.

[0063] Figure 27 A perspective view showing an electronic device according to the fifteenth embodiment of the present disclosure.

[0064] Figure 28 Showing Figure 27 A side view of the electronic device.

[0065] Figure 29 Showing Figure 27 A top view of the electronic device.

[0066] Figure 30 A partial internal view showing an electronic device according to the sixteenth embodiment of the present disclosure.

[0067] Figure 31 Showing Figure 30 A schematic diagram of an image captured when the imaging device of the electronic device performs a detection function.

[0068] Figure 32 A schematic diagram showing an inflection point on the lens surface and a critical point on the lens surface in the first embodiment of the present disclosure.

[0069] Figure 33 A schematic diagram showing parameters ET1, ET2, ET3, SAG1R2, SAG3R1, SAG5R2, SAG6R1, Y5R2, Y6R1 in the first embodiment of the present disclosure.

[0070] Figure 34 A schematic diagram showing a configuration relationship of an optical path turning element in a photographic lens group according to the present disclosure.

[0071] Figure 35 A schematic diagram showing another configuration relationship of an optical path turning element in a photographic lens group according to the present disclosure.

[0072] Figure 36 A schematic diagram showing a configuration relationship of two optical path turning elements in a photographic lens group according to the present disclosure.

[0073]

Symbol Description

[0074] 1, 2, 3, 4, 5, 6, 7, 8, 9, 100, 100a, 100b, 100c, 100d, 100e, 100f, 100g, 100h, 100i, 100j, 100k, 100m, 100n, 100p, 100q, 100r, 100s, 601, 701: Imaging device

[0075] 101: Imaging lens

[0076] 102: Driving device

[0077] 103: Electronic photosensitive element

[0078] 104: Image stabilization module

[0079] 200, 300, 400, 500, 600, 700: Electronic device

[0080] 201, 304: Display module

[0081] 301, 401, 501: Flashlight module

[0082] 302: Focus assist module

[0083] 303: Image signal processor

[0084] 305: Image software processor

[0085] 306: Object to be photographed

[0086] 702: Instrument panel

[0087] 703: Central console

[0088] C: Critical point

[0089] P: Inflection point

[0090] OA1: First optical axis

[0091] OA2: Second optical axis

[0092] OA3: Third optical axis

[0093] LF: Optical path turning element

[0094] LF1: First optical path turning element

[0095] LF2: Second optical path turning element

[0096] LG: Lens group

[0097] ST: Aperture

[0098] S1, S2: Diaphragm

[0099] E1: First lens

[0100] E2: Second lens

[0101] E3: Third lens

[0102] E4: Fourth lens

[0103] E5: Fifth lens

[0104] E6: The sixth lens

[0105] E7, E8: Filter elements

[0106] IMG: Imaging surface

[0107] IS: Electronic photosensitive element

[0108] ET1: The distance parallel to the optical axis between the maximum effective radius position of the object side surface of the first lens and the maximum effective radius position of the image side surface of the first lens

[0109] ET2: The distance parallel to the optical axis between the maximum effective radius position of the object side surface of the second lens and the maximum effective radius position of the image side surface of the second lens

[0110] ET3: The distance parallel to the optical axis between the maximum effective radius position of the object side surface of the third lens and the maximum effective radius position of the image side surface of the third lens

[0111] SAG1R2: The displacement parallel to the optical axis from the intersection point of the image side surface of the first lens on the optical axis to the maximum effective radius position of the image side surface of the first lens

[0112] SAG3R1: The displacement 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

[0113] SAG5R2: The displacement parallel to the optical axis from the intersection point of the image side surface of the fifth lens on the optical axis to the maximum effective radius position of the image side surface of the fifth lens

[0114] SAG6R1: The displacement parallel to the optical axis from the intersection point of the object side surface of the sixth lens on the optical axis to the maximum effective radius position of the object side surface of the sixth lens

[0115] Y5R2: The maximum effective radius of the image side surface of the fifth lens

[0116] Y6R1: The maximum effective radius of the object side surface of the sixth lens Detailed implementation manners

[0117] The photographic lens group includes six lenses, and the six lenses are, in order from the object side to the image side along the optical path, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens. Among them, the six lenses respectively have an object side surface facing the object side direction and an image side surface facing the image side direction.

[0118] The first lens may have a negative refractive power; thereby, it helps to expand the viewing angle to obtain image information over a larger range. The object-side surface of the first lens may be convex near the optical axis; thereby, it is beneficial to increase the viewing angle and the imaging size. The image-side surface of the first lens may be concave near the optical axis; thereby, the surface shape of the first lens can be adjusted to reconcile the optical path and achieve a balance between the viewing angle and the image size.

[0119] The object-side surface of the second lens is convex near the optical axis. Thereby, aberrations such as spherical aberration and coma can be corrected, which helps to improve the imaging quality.

[0120] The image-side surface of the fourth lens may be convex near the optical axis. Thereby, it helps to converge light and avoid insufficient light deflection in the peripheral region, resulting in ineffective light concentration.

[0121] The fifth lens may have a negative refractive power; thereby, it helps to adjust the optical path to increase the imaging surface and is beneficial to adjusting the refractive power configuration of the photographic lens group. The object-side surface of the fifth lens may be concave near the optical axis; thereby, it helps to adjust the incident angle of light on the fifth lens and avoid light divergence. The image-side surface of the fifth lens may be convex near the optical axis; thereby, it is beneficial to correct astigmatism and reduce the distortion of the photographic lens group to improve the imaging quality.

[0122] The sixth lens may have a positive refractive power; thereby, it helps to converge light and reduce the length of the back focal length. The object-side surface of the sixth lens may be convex near the optical axis; thereby, it helps to reduce the field curvature. The image-side surface of the sixth lens may be concave near the optical axis; thereby, it helps to compress the length of the back focal length.

[0123] According to the photographic lens group disclosed in the present disclosure, the image-side surface of the sixth lens has at least one inflection point. Thereby, the incident angle of light on the imaging surface can be adjusted, the angles of peripheral light can be controlled, and vignetting and distortion at the periphery of the image can be avoided. Please refer to Figure 32 , which shows a schematic diagram of the inflection point P on the image-side surface of the sixth lens E6 in the first embodiment of the present disclosure. Figure 32 The inflection point located on the image-side surface of the sixth lens in the first embodiment of the present disclosure is shown as an exemplary illustration. However, in each embodiment of the present disclosure, each lens surface may have one or more inflection points.

[0124] According to the photographic lens group disclosed in the present disclosure, the image-side surface of the sixth lens may have at least one critical point off the axis. Thereby, it is beneficial to increase the design freedom of the peripheral surface shape of the image-side surface of the sixth lens and helps to balance the light concentration quality of incident light at a large viewing angle. Please refer to Figure 32 , which shows a schematic diagram of the critical point C off the axis on the image-side surface of the sixth lens E6 in the first embodiment of the present disclosure. Figure 32Illustrating the critical point on the image-side surface of the sixth lens in the first embodiment of the present disclosure as an example, in each embodiment of the present disclosure, one or more critical points may be present at an off-axis position on each lens surface.

[0125] According to the photographic lens group disclosed in the present disclosure, an aperture may further be included, and the aperture may be disposed in the object-side direction of the fourth lens. Thereby, the position of the aperture can be adjusted to achieve a balance among the viewing angle, the overall length, and the relative illuminance of the peripheral field of view. Among them, the aperture may also be disposed in the object-side direction of the third lens. Among them, the aperture may also be disposed between the second lens and the third lens; thereby, while maintaining the specifications of a wider shooting field of view and a larger imaging range, the overall length of the photographic lens group can be effectively shortened.

[0126] According to the photographic lens group disclosed in the present disclosure, there may be an air gap on the optical axis between all adjacent lenses, that is, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens may be six single non-bonded lenses. Since the process of bonded lenses is more complex than that of non-bonded lenses, especially when the bonding surfaces of two lenses need to have highly accurate curved surfaces to achieve a high degree of tightness when the two lenses are bonded, and during the bonding process, poor tightness may also be caused by misalignment, affecting the overall optical imaging quality. Therefore, in the photographic lens group of the present disclosure, there may be an air gap on the optical axis between all adjacent lenses, which can effectively avoid the problems caused by bonded lenses and can effectively reduce the limitations in optical design, facilitating the adjustment of the optical path to achieve the target specifications.

[0127] According to the photographic lens group disclosed in the present disclosure, at least three lenses may be made of plastic material; thereby, it helps to reduce the production cost and effectively improve the manufacturability of aspherical lenses. Among them, at least two lenses in the photographic lens group may be made of the same plastic material; thereby, the material configuration can be adjusted, the production cost can be reduced, and the manufacturability can be improved.

[0128] The distance from the object-side surface of the first lens to the imaging surface on the optical axis is TL, and the focal length of the photographic lens group is f, which satisfies the following condition: 2.00 < TL / f < 5.40. Thereby, it helps to achieve a balance between the overall length and the viewing angle. Among them, it may also satisfy the following condition: 2.80 < TL / f < 5.50. Among them, it may also satisfy the following condition: 3.00 < TL / f < 5.40. Among them, it may also satisfy the following condition: 3.20 < TL / f < 5.40. Among them, it may also satisfy the following condition: 3.60 ≤ TL / f ≤ 5.10.

[0129] The focal length of the second lens is f2, and the focal length of the sixth lens is f6, which can satisfy the following conditions: 1.10 < |f2 / f6| < 25.00. Thereby, the refractive power ratio between the second lens and the sixth lens can be adjusted to correct spherical aberration and astigmatism. Among them, the following conditions can also be satisfied: 1.10 < |f2 / f6| < 15.00. Among them, the following conditions can also be satisfied: 1.56 ≤ |f2 / f6| ≤ 5.55.

[0130] The maximum viewing angle in the photographic lens group is FOV, which can satisfy the following conditions: 100.0 degrees < FOV < 150.0 degrees. Thereby, it helps to standardize the viewing angle specifications and avoid aberrations such as distortion caused by an overly large viewing angle. Among them, the following conditions can also be satisfied: 105.0 degrees < FOV < 145.0 degrees. Among them, the following conditions can also be satisfied: 108.0 degrees < FOV < 140.0 degrees. Among them, the following conditions can also be satisfied: 114.0 degrees ≤ FOV ≤ 130.3 degrees.

[0131] The radius of curvature of the object side surface of the fifth lens is R9, and the radius of curvature of the image side surface of the fifth lens is R10, which can satisfy the following conditions: (R9 + R10) / (R9 - R10) < -1.60. Thereby, the radius of curvature of the object side surface of the fifth lens and the radius of curvature of the image side surface of the fifth lens can be effectively balanced, the outgoing direction of light rays in the fifth lens can be adjusted, and it helps to increase the imaging surface. Among them, the following conditions can also be satisfied: -10.00 < (R9 + R10) / (R9 - R10) < -1.60. Among them, the following conditions can also be satisfied: (R9 + R10) / (R9 - R10) < -1.90. Among them, the following conditions can also be satisfied: -8.00 < (R9 + R10) / (R9 - R10) < -1.90. Among them, the following conditions can also be satisfied: -5.25 ≤ (R9 + R10) / (R9 - R10) ≤ -2.37.

[0132] The focal length of the first lens is f1, the focal length of the second lens is f2, and the focal length of the fifth lens is f5, which can satisfy the following conditions: 0.85 < (|f1| + |f2|) / |f5| < 10.50. Thereby, the refractive powers of the first lens, the second lens and the fifth lens can be adjusted, which helps to balance the convergence or divergence of incident light rays with a large viewing angle and improve the light-gathering quality of the entire field of view. Among them, the following conditions can also be satisfied: 1.05 < (|f1| + |f2|) / |f5| < 8.00. Among them, the following conditions can also be satisfied: 2.01 ≤ (|f1| + |f2|) / |f5| ≤ 5.39.

[0133] The radius of curvature of the object-side surface of the sixth lens is R11, and the radius of curvature of the image-side surface of the sixth lens is R12, which can satisfy the following conditions: (R11 + R12) / (R11 - R12) < -0.55. Thereby, by adjusting the radius of curvature of the object-side surface and the radius of curvature of the image-side surface of the sixth lens, the field curvature and distortion can be improved to correct the imaging quality. Among them, the following conditions can also be satisfied: -10.00 < (R11 + R12) / (R11 - R12) < -0.65. Among them, the following conditions can also be satisfied: -8.00 < (R11 + R12) / (R11 - R12) < -0.65. Among them, the following conditions can also be satisfied: -4.23 ≤ (R11 + R12) / (R11 - R12) ≤ -0.96.

[0134] The focal length of the first lens is f1, the focal length of the second lens is f2, the focal length of the third lens is f3, and the focal length of the sixth lens is f6, which can satisfy the following conditions: 1.70 < (|f2| + |f3|) / (|f1| + |f6|). Thereby, it helps with the optical path adjustment and balances the refractive power distribution of the photographic lens group. Among them, the following conditions can also be satisfied: 1.80 < (|f2| + |f3|) / (|f1| + |f6|) < 40.00. Among them, the following conditions can also be satisfied: 2.07 ≤ (|f2| + |f3|) / (|f1| + |f6|) ≤ 21.47.

[0135] The radius of curvature of the object-side surface of the first lens is R1, and the radius of curvature of the object-side surface of the second lens is R3, which can satisfy the following conditions: -0.15 < R3 / R1. Thereby, the surface shapes of the first lens and the second lens can be coordinated with each other to correct the aberration. Among them, the following conditions can also be satisfied: -0.15 < R3 / R1 < 15.00. Among them, the following conditions can also be satisfied: -0.15 < R3 / R1 < 10.00. Among them, the following conditions can also be satisfied: -0.10 < R3 / R1 < 70.00. Among them, the following conditions can also be satisfied: -0.10 < R3 / R1 < 40.00. Among them, the following conditions can also be satisfied: 0.21 ≤ R3 / R1 ≤ 1.02.

[0136] The focal length of the first lens is f1, and the focal length of the second lens is f2, which can satisfy the following conditions: 1.80 < |f2 / f1| < 25.00. Thereby, the refractive powers of the first lens and the second lens can be effectively balanced, which helps to expand the shooting field of view and correct the off-axis aberration. Among them, the following conditions can also be satisfied: 1.80 < |f2 / f1| < 17.00. Among them, the following conditions can also be satisfied: 2.19 ≤ |f2 / f1| ≤ 5.83.

[0137] The distance between the fourth lens and the fifth lens on the optical axis is T45, and the distance between the fifth lens and the sixth lens on the optical axis is T56, which can satisfy the following conditions: 0 < T56 / T45 < 2.30. Thereby, the position of the fifth lens can be adjusted in cooperation with the surface shape design of the fifth lens, effectively avoiding the total reflection phenomenon. Among them, the following conditions can also be satisfied: 0 < T56 / T45 < 2.00. Among them, the following conditions can also be satisfied: 0 < T56 / T45 < 1.50. Among them, the following conditions can also be satisfied: 0.13 ≤ T56 / T45 ≤ 0.87.

[0138] The focal length of the photographic lens group is f, and the radius of curvature of the object side surface of the first lens is R1, which can satisfy the following conditions: -0.10 < f / R1. Thereby, the curvature degree of the object side surface of the first lens can be regulated, which is helpful for collecting light with a large viewing angle. Among them, the following conditions can also be satisfied: -0.10 < f / R1 < 2.50. Among them, the following conditions can also be satisfied: -0.10 < f / R1 < 1.50. Among them, the following conditions can also be satisfied: 0.14 ≤ f / R1 ≤ 0.81.

[0139] The aperture value (F-number) of the photographic lens group is Fno, which can satisfy the following conditions: 1.50 < Fno < 2.70. Thereby, a balance can be achieved between illuminance and depth of field.

[0140] The distance from the object side surface of the first lens to the imaging surface on the optical axis is TL, and the maximum imaging height of the photographic lens group (which can be half of the total length of the diagonal of the effective sensing area of the electronic photosensitive element) is ImgH, which can satisfy the following conditions: TL / ImgH < 3.30. Thereby, it is helpful to achieve a balance between the total length and the size of the imaging surface. Among them, the following conditions can also be satisfied: 1.10 < TL / ImgH < 2.90. Among them, the following conditions can also be satisfied: 1.85 < TL / ImgH < 2.90.

[0141] The distance between the third lens and the fourth lens on the optical axis is T34, and the distance between the fifth lens and the sixth lens on the optical axis is T56, which can satisfy the following conditions: 0 < T56 / T34 < 5.50. Thereby, it is beneficial to shorten the total length of the photographic lens group while avoiding peripheral light divergence. Among them, the following conditions can also be satisfied: 0 < T56 / T34 < 3.50.

[0142] 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 first lens is R2, which can satisfy the following conditions: 0 < |R1 / R2| < 25.0. Thereby, the surface shape of the first lens can be adjusted, effectively converging the light with a large viewing angle and reducing the generation of spherical aberration. Among them, the following conditions can also be satisfied: 0 < |R1 / R2| < 18.0. Among them, the following conditions can also be satisfied: 0 < |R1 / R2| < 15.0.

[0143] The distance between the second lens and the third lens on the optical axis is T23, and the thickness of the second lens on the optical axis is CT2, which can satisfy the following condition: 0 < T23 / CT2 < 1.10. Thereby, it can be ensured that the second lens has sufficient thickness to deflect light rays with a large viewing angle. Among them, the following condition can also be satisfied: 0 < T23 / CT2 < 0.90.

[0144] The Abbe number of the first lens is V1, the Abbe number of the second lens is V2, and the Abbe number of the fifth lens is V5, which can satisfy the following condition: 0.30 < (V2 + V5) / V1 < 1.30. Thereby, the materials of the first lens, the second lens, and the fifth lens can be mutually coordinated to correct the chromatic aberration of the photographic lens group and improve the image quality.

[0145] The distance between the image-side surface of the sixth lens and the imaging surface on the optical axis is BL, and the thickness of the fifth lens on the optical axis is CT5, which can satisfy the following condition: 0.5 < BL / CT5 < 8.00. Thereby, the back focal length can be effectively shortened, and the overall length of the optical lens can be prevented from being too long. Among them, the following condition can also be satisfied: 1.0 < BL / CT5 < 6.50. Among them, the following condition can also be satisfied: 1.2 < BL / CT5 < 6.00.

[0146] The thickness of the third lens on the optical axis is CT3, and the distance parallel to the optical axis between the position of the maximum effective radius of the object-side surface of the third lens and the position of the maximum effective radius of the image-side surface of the third lens is ET3, which can satisfy the following condition: 0.80 < CT3 / ET3 < 2.00. Thereby, the surface shape of the third lens can be adjusted, which helps to balance the volume distribution at the object side and the image side of the photographic lens group. Among them, the following condition can also be satisfied: 0.90 < CT3 / ET3 < 1.80. Please refer to Figure 33 , a schematic diagram showing the parameter ET3 in the first embodiment according to the present disclosure.

[0147] The displacement parallel to the optical axis from the intersection of the object-side surface of the third lens on the optical axis to the position of the maximum effective radius of the object-side surface of the third lens is SAG3R1, and the displacement parallel to the optical axis from the intersection of the image-side surface of the fifth lens on the optical axis to the position of the maximum effective radius of the image-side surface of the fifth lens is SAG5R2, which can satisfy the following condition: -1.00 < SAG3R1 / SAG5R2 < 0.50. Thereby, the bending degree of the peripheral surface shapes of the object side of the third lens and the image side of the fifth lens can be controlled so that they cooperate with each other to guide the traveling direction of light rays. Among them, the following condition can also be satisfied: -0.65 < SAG3R1 / SAG5R2 < 0.20. Please refer to Figure 33 , a schematic diagram showing the parameters SAG3R1 and SAG5R2 in the first embodiment according to the present disclosure, wherein the value of the displacement is positive when it is in the image-side direction and negative when it is in the object-side direction.

[0148] The thickness of the first lens on the optical axis is CT1, and the thickness of the second lens on the optical axis is CT2, which can satisfy the following conditions: 0 < CT1 / CT2 < 1.20. Thereby, the ratio of the central thickness of the first lens and the second lens can be balanced, which is beneficial to reducing manufacturing tolerances and improving the qualified rate. Among them, the following conditions can also be satisfied: 0.20 < CT1 / CT2 < 1.00.

[0149] The distance between the second lens and the third lens on the optical axis is T23, and the distance between the fifth lens and the sixth lens on the optical axis is T56, which can satisfy the following conditions: 0 < T56 / T23 < 5.50. Thereby, it helps to compress the volume of the photographic lens group and maintain the optimal spatial configuration. Among them, the following conditions can also be satisfied: 0 < T56 / T23 < 3.50.

[0150] The distance from the object side surface of the first lens to the imaging surface on the optical axis is TL, the aperture value of the photographic lens group is Fno, and the focal length of the photographic lens group is f, which can satisfy the following conditions: 1.30 < TL×Fno / f < 3.00. Thereby, the photographic lens group can achieve a balance among the total length, the viewing angle, and the illuminance, and further meet more diverse applications. Among them, the following conditions can also be satisfied: 1.30 < TL×Fno / f < 2.80. Among them, the following conditions can also be satisfied: 1.30 < TL×Fno / f < 2.60.

[0151] The maximum effective radius of the image side surface of the fifth lens is Y5R2, and the maximum effective radius of the object side surface of the sixth lens is Y6R1, which can satisfy the following conditions: 1.05 < Y6R1 / Y5R2 < 1.80. Thereby, by adjusting the marginal ray height between the image side of the fifth lens and the object side of the sixth lens, it is beneficial to increase the imaging area. Please refer to Figure 33 for a schematic diagram showing the parameters Y5R2 and Y6R1 in accordance with the first embodiment of the present disclosure.

[0152] The displacement amount parallel to the optical axis from the intersection point of the object side surface of the sixth lens on the optical axis to the position of the maximum effective radius of the object side surface of the sixth lens is SAG6R1, and the thickness of the sixth lens on the optical axis is CT6, which can satisfy the following conditions: 0 < SAG6R1 / CT6 < 0.70. Thereby, the surface shape change of the sixth lens can be adjusted, astigmatism and distortion can be improved, and the imaging quality can be enhanced. Please refer to Figure 33 for a schematic diagram showing the parameter SAG6R1 in accordance with the first embodiment of the present disclosure, wherein the displacement amount is positive when it is in the image side direction and negative when it is in the object side direction.

[0153] The maximum absolute value of the distortion aberration on the imaging surface within the maximum field of view of the photographic lens group is |DIST|max, which satisfies the following condition: |DIST|max < 50%. Thus, the image quality can be effectively managed and the problem of image distortion on the screen can be reduced. Among them, the following condition can also be satisfied: |DIST|max < 30%. Among them, the following condition can also be satisfied: 3% < |DIST|max < 25%.

[0154] The distance between the first lens and the second lens on the optical axis is T12, and the distance between the second lens and the third lens on the optical axis is T23, which satisfies the following condition: 1.10 < T12 / T23. Thus, the lens spacing configuration of the photographic lens group can be adjusted so that the lenses near the object side have a larger spacing, which helps to balance the entry of large-angle light into the imaging surface. Among them, the following condition can also be satisfied: 1.10 < T12 / T23 < 15.00.

[0155] 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 satisfies the following condition: 1.05 < CT3 / CT1. Thus, the ratio of the central thickness of the first lens and the third lens can be controlled, which helps to reduce the manufacturing sensitivity. Among them, the following condition can also be satisfied: 1.05 < CT3 / CT1 < 4.00.

[0156] The maximum value of the thickness of a single lens on the optical axis among all the lenses of the photographic lens group is CTmax, and the maximum value of the distance between all adjacent lenses of the photographic lens group on the optical axis is ATmax, which satisfies the following condition: 0.85 < CTmax / ATmax. Thus, the space of the photographic lens group can be effectively compressed to meet the requirement of miniaturization. Among them, the following condition can also be satisfied: 0.85 < CTmax / ATmax < 3.80.

[0157] The focal length of the second lens is f2, and the focal length of the fifth lens is f5, which satisfies the following condition: 0.90 < |f2 / f5|. Thus, the refractive power of the second lens and the fifth lens can be adjusted, which helps to increase the balance of the photographic lens group and reduce the decentration sensitivity at the same time. Among them, the following condition can also be satisfied: 1.20 < |f2 / f5| < 15.00. Among them, the following condition can also be satisfied: 1.20 < |f2 / f5| < 5.00.

[0158] The displacement of the intersection point of the image-side surface of the first lens on the optical axis to the maximum effective radius position of the image-side surface of the first lens parallel to the optical axis is SAG1R2, and the thickness of the first lens on the optical axis is CT1, which satisfies the following condition: 1.10 < SAG1R2 / CT1 < 2.50. Thus, it can be ensured that the peripheral surface shape of the image side of the first lens has a certain degree of curvature, which helps to increase the viewing angle. Please refer to Figure 33, a schematic diagram showing the parameter SAG1R2 in the first embodiment of the present disclosure, where the displacement value is positive in the image side direction and negative in the object side direction.

[0159] The distance parallel to the optical axis between the maximum effective radius position of the object side surface of the first lens and the maximum effective radius position of the image side surface of the first lens is ET1, and the distance parallel to the optical axis between the maximum effective radius position of the object side surface of the second lens and the maximum effective radius position of the image side surface of the second lens is ET2, which can satisfy the following condition: 0.3 < ET2 / ET1 < 1.4. Thereby, the lens edge thickness of the first lens and the second lens can be adjusted to assist in turning the large-angle light path. Please refer to Figure 33 , a schematic diagram showing the parameters ET1 and ET2 in the first embodiment of the present disclosure.

[0160] Each technical feature in the photographic lens group disclosed in the present disclosure can be combined and configured to achieve the corresponding effects.

[0161] In the photographic lens group disclosed in the present disclosure, 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 photographic lens group can be increased, and the influence of the change in the external environmental temperature on imaging can be reduced, and the glass lens can be made by techniques such as grinding or molding. If the lens material is plastic, the production cost can be effectively reduced. In addition, a spherical or aspherical surface (ASP) can be provided on the lens surface. Among them, the spherical lens can reduce the manufacturing difficulty, and if an aspherical surface is provided on the lens surface, more control variables can be obtained thereby to eliminate aberrations, reduce the number of lenses, and effectively reduce the total length of the photographic lens group disclosed in the present disclosure. Further, the aspherical surface can be made by methods such as plastic injection molding or molding of glass lenses.

[0162] In the photographic lens group disclosed in the present disclosure, if the lens surface is aspherical, it means that all or a part of the optically effective area of the lens surface is aspherical.

[0163] In the photographic lens group disclosed in the present disclosure, additives can be selectively added to any (or more) lens materials to produce light absorption or light interference effects, so as to change the transmittance of the lens to light of 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 help reduce excess red light or infrared light; or it can filter light in the wavelength band of 350 nm to 450 nm to reduce excess blue light or ultraviolet light. Therefore, the additive can avoid the interference of light in a specific wavelength band on imaging. In addition, the additive can be uniformly mixed in the plastic material 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 effects.

[0164] In the photographic lens group disclosed in the present disclosure, if the lens surface is convex and the position of the convex surface is not defined, it means that the convex surface can be located near the optical axis of the lens surface; if the lens surface is concave and the position of the concave surface is not defined, it means that the concave surface can be located near the optical axis of the lens surface. If the refractive power or focal length of the lens does not define its regional position, it means that the refractive power or focal length of the lens can be the refractive power or focal length of the lens near the optical axis.

[0165] In the photographic lens group disclosed in the present disclosure, the inflection point of the lens surface refers to the intersection point where the positive and negative curvatures of the lens surface change. The critical point of the lens surface refers to the tangent point on the tangent line where the plane perpendicular to the optical axis is tangent to the lens surface, and the critical point is not located on the optical axis.

[0166] In the photographic lens group disclosed in the present disclosure, the imaging surface of the photographic lens group 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.

[0167] In the photographic lens group disclosed in the present disclosure, one or more imaging correction elements (such as flat field elements, etc.) 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 the concave surface facing the object side near the imaging surface.

[0168] In the photographic lens group disclosed in the present disclosure, at least one element with the function of turning the optical path can also be selectively arranged between the object to be photographed and the imaging surface on the imaging optical path, such as a prism or a mirror, etc. Among them, the prism surface or the mirror surface can be a plane, a spherical surface, an aspherical surface or a free-form surface, etc., to provide a higher elastic spatial configuration for the photographic lens group, so that the thinning of the electronic device is not restricted by the total optical length of the photographic lens group. For further description, please refer to Figure 34 and Figure 35 where Figure 34 shows a schematic diagram of a configuration relationship of an optical path turning element in a photographic lens group according to the present disclosure, and Figure 35 shows another schematic diagram of a configuration relationship of an optical path turning element in a photographic lens group according to the present disclosure. As Figure 34 and Figure 35As shown, the photographic lens group can have a first optical axis OA1, an optical path turning element LF, and a second optical axis OA2 in sequence along the optical path from the object (not shown) to the imaging surface IMG. The optical path turning element LF can be arranged as shown in Figure 34 between the object and the lens group LG of the photographic lens group, or as shown in Figure 35 between the lens group LG of the photographic lens group and the imaging surface IMG. In addition, please refer to Figure 36 . A schematic diagram showing a configuration relationship of two optical path turning elements in the photographic lens group according to the present disclosure is shown. As shown in Figure 36 , the photographic lens group can also have a first optical axis OA1, a first optical path turning element LF1, a second optical axis OA2, a second optical path turning element LF2, and a third optical axis OA3 in sequence along the optical path from the object (not shown) to the imaging surface IMG. The first optical path turning element LF1 is arranged between the object and the lens group LG of the photographic lens group, and the second optical path turning element LF2 is arranged between the lens group LG of the photographic lens group and the imaging surface IMG. And the traveling direction of the light on the first optical axis OA1 can be the same as the traveling direction of the light on the third optical axis OA3 as shown in Figure 36 . The photographic lens group can also be selectively configured with more than three optical path turning elements. The present disclosure is not limited to the types, numbers, and positions of the optical path turning elements disclosed in the drawings.

[0169] In the photographic lens group disclosed in the present disclosure, at least one aperture stop can be provided, which can be located in front of the first lens, between each lens, or behind the last lens. The types of the aperture stop such as a glare stop or a field stop can be used to reduce stray light and help improve the image quality.

[0170] In the photographic lens group disclosed in the present disclosure, the aperture can be configured as a front aperture or a middle aperture. The front aperture means that the aperture is arranged between the object 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 have a longer distance from the imaging surface, making it have a telecentric effect and increasing the efficiency of the CCD or CMOS of the electronic photosensitive element to receive the image. If it is a middle aperture, it helps to expand the field of view angle of the photographic lens group.

[0171] The present disclosure may appropriately provide a variable aperture element, which may be a mechanical component or a light control element, and can control the size and shape of the aperture electrically or by an electrical signal. The mechanical component may include movable parts such as a blade group, a shielding plate, etc.; the light control element may include shielding materials such as a filter element, an electrochromic material, a liquid crystal layer, etc. The variable aperture element can enhance the ability of image adjustment by controlling the amount of incident light or the exposure time of the image. In addition, the variable aperture element may also be the aperture of the present disclosure, and can adjust the image quality, such as depth of field or exposure speed, by changing the aperture value.

[0172] The present disclosure may appropriately provide one or more optical elements to limit the form of light passing through the photographic lens group. The optical element may be a filter, a polarizer, etc., but the present disclosure is not limited thereto. And the optical element may be a single element, a composite component or presented in the form of a thin film, etc., but the present disclosure is not limited thereto. The optical element may be placed at the object end, the image end or between the lenses of the photographic lens group to control the passage of specific forms of light, thereby meeting the application requirements.

[0173] In the photographic lens group disclosed in the present disclosure, it may include at least one optical lens, optical element or carrier, and at least one surface thereof has an anti-reflection layer, and the anti-reflection layer can effectively reduce the stray light generated by the reflection of light at the interface. The anti-reflection layer may be provided 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 may be a light-shielding element, an annular spacer element, a lens barrel element, a cover glass, a blue glass, a filter element (Filter, Color filter), an optical path turning element (reflection element), a prism or a mirror, etc.; the carrier may be a lens group lens mount, a microlens provided on the photosensitive element, the periphery of the photosensitive element substrate or a glass sheet for protecting the photosensitive element, etc.

[0174] In the photographic lens group disclosed in the present disclosure, the object side and the image side are determined according to the optical axis direction, and the data on the optical axis is calculated along the optical axis. And when the optical axis is turned by an optical path turning element, the data on the optical axis is also calculated along the optical axis.

[0175] According to the above embodiments, specific embodiments are proposed below and will be described in detail with reference to the accompanying drawings.

[0176] <First Embodiment>

[0177] Please refer to Figures 1 to 2 , in which Figure 1 shows a schematic diagram of an image pickup device according to the first embodiment of the present disclosure, Figure 2 and the spherical aberration, astigmatism and distortion curves of the first embodiment are shown in sequence from left to right.Figure 1 It can be known that the imaging device 1 includes a photographic lens group (not otherwise labeled) and an electronic photosensitive element IS. The photographic lens group sequentially includes a first lens E1, a diaphragm S1, a second lens E2, an aperture ST, a third lens E3, a diaphragm S2, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter element (Filter) E7, a filter element E8, and an imaging surface IMG along the optical path from the object side to the image side. Among them, the electronic photosensitive element IS is disposed on the imaging surface IMG. The photographic lens group includes six lenses (E1, E2, E3, E4, E5, E6), and there are no other interpolated lenses between the lenses. Among them, there is an air gap on the optical axis between all adjacent lenses of the six lenses of the photographic lens group.

[0178] The first lens E1 has a negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, its image-side surface is concave near the optical axis, and both of its surfaces are aspherical surfaces.

[0179] The second lens E2 has a positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, its image-side surface is concave near the optical axis, and both of its surfaces are aspherical surfaces.

[0180] The third lens E3 has a positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, its image-side surface is convex near the optical axis, and both of its surfaces are aspherical surfaces.

[0181] The fourth lens E4 has a positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, its image-side surface is convex near the optical axis, and both of its surfaces are aspherical surfaces. Its object-side surface has two inflection points, and its image-side surface has one inflection point.

[0182] The fifth lens E5 has a negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, its image-side surface is convex near the optical axis, and both of its surfaces are aspherical surfaces. Its object-side surface has two inflection points, and its image-side surface has one inflection point.

[0183] The sixth lens E6 has a positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, its image-side surface is concave near the optical axis, and both of its surfaces are aspherical surfaces. Its object-side surface has two inflection points, its image-side surface has one inflection point, its object-side surface has a critical point off the axis, and its image-side surface has a critical point off the axis.

[0184] The material of the filter element E7 is glass. It is disposed between the sixth lens E6 and the imaging surface IMG and does not affect the focal length of the photographic lens group.

[0185] The material of the filter element E8 is glass. It is disposed between the filter element E7 and the imaging surface IMG and does not affect the focal length of the photographic lens group.

[0186] The aspheric curve equations of the above lenses are expressed as follows:

[0187]

[0188] X: The displacement parallel to the optical axis from the intersection of the aspheric surface and the optical axis to a point on the aspheric surface at a distance Y from the optical axis;

[0189] Y: The perpendicular distance from a point on the aspheric curve to the optical axis;

[0190] R: The radius of curvature;

[0191] k: The conic coefficient; and

[0192] Ai: The i-th order aspheric coefficient.

[0193] In the photographic lens group of the first embodiment, the focal length of the photographic lens group is f, the aperture value of the photographic lens group is Fno, and half of the maximum viewing angle in the photographic lens group is HFOV. The values are as follows: f = 1.83 millimeters (mm), Fno = 2.15, HFOV = 57.0 degrees (deg.).

[0194] The maximum viewing angle in the photographic lens group is FOV, which satisfies the following condition: FOV = 114.0 degrees.

[0195] The distance from the object side surface of the first lens E1 to the imaging surface IMG on the optical axis is TL, and the focal length of the photographic lens group is f, which satisfies the following condition: TL / f = 4.43.

[0196] The distance from the object side surface of the first lens E1 to the imaging surface IMG on the optical axis is TL, and the maximum imaging height of the photographic lens group is ImgH, which satisfies the following condition: TL / ImgH = 2.70.

[0197] The distance from the object side surface of the first lens E1 to the imaging surface IMG on the optical axis is TL, the aperture value of the photographic lens group is Fno, and the focal length of the photographic lens group is f, which satisfies the following condition: TL × Fno / f = 2.06.

[0198] The focal length of the first lens E1 is f1, and the focal length of the second lens E2 is f2, which satisfies the following condition: |f2 / f1| = 2.47.

[0199] The focal length of the second lens E2 is f2, and the focal length of the fifth lens E5 is f5, which satisfies the following condition: |f2 / f5| = 2.28.

[0200] The focal length of the second lens E2 is f2, and the focal length of the sixth lens E6 is f6, which satisfy the following condition: |f2 / f6| = 2.04.

[0201] The focal length of the first lens E1 is f1, the focal length of the second lens E2 is f2, and the focal length of the fifth lens E5 is f5, which satisfy the following condition: (|f1| + |f2|) / |f5| = 3.21.

[0202] The focal length of the first lens E1 is f1, the focal length of the second lens E2 is f2, the focal length of the third lens E3 is f3, and the focal length of the sixth lens E6 is f6, which satisfy the following condition: (|f2| + |f3|) / (|f1| + |f6|) = 2.98.

[0203] The focal length of the photographic lens group is f, and the radius of curvature of the object side surface of the first lens E1 is R1, which satisfy the following condition: f / R1 = 0.58.

[0204] The radius of curvature of the object side surface of the first lens E1 is R1, and the radius of curvature of the image side surface of the first lens E1 is R2, which satisfy the following condition: |R1 / R2| = 3.71.

[0205] The radius of curvature of the object side surface of the first lens E1 is R1, and the radius of curvature of the object side surface of the second lens E2 is R3, which satisfy the following condition: R3 / R1 = 0.58.

[0206] The radius of curvature of the object side surface of the fifth lens E5 is R9, and the radius of curvature of the image side surface of the fifth lens E5 is R10, which satisfy the following condition: (R9 + R10) / (R9 - R10) = -2.56.

[0207] The radius of curvature of the object side surface of the sixth lens E6 is R11, and the radius of curvature of the image side surface of the sixth lens E6 is R12, which satisfy the following condition: (R11 + R12) / (R11 - R12) = -1.67.

[0208] The thickness of the first lens E1 on the optical axis is CT1, and the thickness of the second lens E2 on the optical axis is CT2, which satisfy the following condition: CT1 / CT2 = 0.51.

[0209] The thickness of the first lens E1 on the optical axis is CT1, and the thickness of the third lens E3 on the optical axis is CT3, which satisfy the following condition: CT3 / CT1 = 1.61.

[0210] The distance between the second lens E2 and the third lens E3 on the optical axis is T23, and the thickness of the second lens E2 on the optical axis is CT2, which satisfies the following condition: T23 / CT2 = 0.12. In this embodiment, the distance between two adjacent lenses on the optical axis refers to the distance on the optical axis between two adjacent mirror surfaces of two adjacent lenses.

[0211] The distance between the first lens E1 and the second lens E2 on the optical axis is T12, and the distance between the second lens E2 and the third lens E3 on the optical axis is T23, which satisfies the following condition: T12 / T23 = 6.24.

[0212] The distance between the second lens E2 and the third lens E3 on the optical axis is T23, and the distance between the fifth lens E5 and the sixth lens E6 on the optical axis is T56, which satisfies the following condition: T56 / T23 = 0.22.

[0213] The distance between the third lens E3 and the fourth lens E4 on the optical axis is T34, and the distance between the fifth lens E5 and the sixth lens E6 on the optical axis is T56, which satisfies the following condition: T56 / T34 = 0.41.

[0214] The distance between the fourth lens E4 and the fifth lens E5 on the optical axis is T45, and the distance between the fifth lens E5 and the sixth lens E6 on the optical axis is T56, which satisfies the following condition: T56 / T45 = 0.13.

[0215] The distance from the image-side surface of the sixth lens E6 to the imaging surface IMG on the optical axis is BL, and the thickness of the fifth lens E5 on the optical axis is CT5, which satisfies the following condition: BL / CT5 = 3.52.

[0216] The maximum value of the thickness of a single lens on the optical axis among all the lenses of the photographic lens group is CTmax, and the maximum value of the distance between all adjacent lenses of the photographic lens group on the optical axis is ATmax, which satisfies the following condition: CTmax / ATmax = 1.46. In this embodiment, the thickness of the sixth lens E6 on the optical axis is greater than the thickness of each of the remaining lenses of the photographic lens group on the optical axis, so CTmax is equal to the thickness of the sixth lens E6 on the optical axis. In this embodiment, the distance between the first lens E1 and the second lens E2 on the optical axis is greater than the distance between the remaining adjacent lenses of the photographic lens group on the optical axis, so ATmax is equal to the distance between the first lens E1 and the second lens E2 on the optical axis.

[0217] The Abbe number of the first lens E1 is V1, the Abbe number of the second lens E2 is V2, and the Abbe number of the fifth lens E5 is V5, which satisfies the following condition: (V2 + V5) / V1 = 0.82.

[0218] The displacement amount parallel to the optical axis from the intersection point on the optical axis of the image-side surface of the first lens E1 to the maximum effective radius position of the image-side surface of the first lens E1 is SAG1R2, and the thickness of the first lens E1 on the optical axis is CT1, which satisfies the following condition: SAG1R2 / CT1 = 1.59.

[0219] The thickness of the third lens E3 on the optical axis is CT3, and the distance parallel to the optical axis between the maximum effective radius position of the object-side surface of the third lens E3 and the maximum effective radius position of the image-side surface of the third lens E3 is ET3, which satisfies the following condition: CT3 / ET3 = 1.19.

[0220] The displacement amount parallel to the optical axis from the intersection point on the optical axis of the object-side surface of the sixth lens E6 to the maximum effective radius position of the object-side surface of the sixth lens E6 is SAG6R1, and the thickness of the sixth lens E6 on the optical axis is CT6, which satisfies the following condition: SAG6R1 / CT6 = 0.16.

[0221] The distance parallel to the optical axis between the maximum effective radius position of the object-side surface of the first lens E1 and the maximum effective radius position of the image-side surface of the first lens E1 is ET1, and the distance parallel to the optical axis between the maximum effective radius position of the object-side surface of the second lens E2 and the maximum effective radius position of the image-side surface of the second lens E2 is ET2, which satisfies the following condition: ET2 / ET1 = 0.9.

[0222] The displacement amount parallel to the optical axis from the intersection point on the optical axis of the object-side surface of the third lens E3 to the maximum effective radius position of the object-side surface of the third lens E3 is SAG3R1, and the displacement amount parallel to the optical axis from the intersection point on the optical axis of the image-side surface of the fifth lens E5 to the maximum effective radius position of the image-side surface of the fifth lens E5 is SAG5R2, which satisfies the following condition: SAG3R1 / SAG5R2 = -0.20.

[0223] The maximum effective radius of the image-side surface of the fifth lens E5 is Y5R2, and the maximum effective radius of the object-side surface of the sixth lens E6 is Y6R1, which satisfies the following condition: Y6R1 / Y5R2 = 1.26.

[0224] The maximum absolute value of the distortion aberration on the imaging surface IMG within the maximum field of view of the photographic lens group is |DIST|max, which satisfies the following condition: |DIST|max = 10%.

[0225] Please refer to Table 1A and Table 1B below for reference.

[0226]

[0227]

[0228] Table 1A is Figure 1Detailed structural data of the first embodiment, where the units of the radius of curvature, thickness, and focal length are millimeters (mm), and surfaces 0 to 20 represent the surfaces from the object side to the image side in sequence. Table 1B shows the aspherical data in the first embodiment, where k is the conic coefficient in the aspherical curve equation, and A4 to A16 represent the 4th to 16th order aspherical coefficients of each surface. In addition, the tables in the following embodiments 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, and will not be elaborated here.

[0229] <The Second Embodiment>

[0230] Please refer to Figures 3 to 4 , where Figure 3 FIG. shows a schematic diagram of an imaging device according to the second embodiment of the present disclosure. Figure 4 From left to right are the spherical aberration, astigmatism, and distortion curves of the second embodiment. As can be seen from Figure 3 , the imaging device 2 includes a photographic lens group (not labeled separately) and an electronic photosensitive element IS. The photographic lens group sequentially includes a first lens E1, a diaphragm S1, a second lens E2, an aperture ST, a third lens E3, a diaphragm S2, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter element E7, a filter element E8, and an imaging surface IMG along the optical path from the object side to the image side. Among them, the electronic photosensitive element IS is disposed on the imaging surface IMG. The photographic lens group includes six lenses (E1, E2, E3, E4, E5, E6), and there are no other interpolated lenses between the lenses. Among them, there is an air gap on the optical axis between all adjacent lenses of the six lenses of the photographic lens group.

[0231] The first lens E1 has a negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, its image-side surface is concave near the optical axis, both of its surfaces are aspherical, its object-side surface has two inflection points, and its image-side surface has three inflection points.

[0232] The second lens E2 has a positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, its image-side surface is concave near the optical axis, and both of its surfaces are aspherical.

[0233] The third lens E3 has a negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, its image-side surface is convex near the optical axis, both of its surfaces are aspherical, its object-side surface has an inflection point, and its object-side surface has a critical point off the axis.

[0234] The fourth lens E4 has a positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, its image-side surface is convex near the optical axis, both of its surfaces are aspherical, and its image-side surface has an inflection point.

[0235] The fifth lens E5 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. Both of its surfaces are aspherical. Its object-side surface has two inflection points, and its image-side surface has three inflection points.

[0236] The sixth lens E6 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. Both of its surfaces are aspherical. Its object-side surface has two inflection points, its image-side surface has one inflection point, its object-side surface has a critical point off the axis, and its image-side surface has a critical point off the axis.

[0237] 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 photographic lens group.

[0238] The filter element E8 is made of glass. It is disposed between the filter element E7 and the imaging surface IMG and does not affect the focal length of the photographic lens group.

[0239] Please refer to Table 2A and Table 2B below for reference.

[0240]

[0241]

[0242] In the second embodiment, the curve equation of the aspherical surface is expressed in the same form as that of the first embodiment. In addition, the definitions described in Table 2C are the same as those of the first embodiment and will not be elaborated here.

[0243]

[0244]

[0245] <Third Embodiment>

[0246] Please refer to Figures 5 to 6 , wherein Figure 5 FIG. shows a schematic diagram of an image pickup device according to the third embodiment of the present disclosure. Figure 6 From left to right are the spherical aberration, astigmatism, and distortion curves of the third embodiment. Figure 5It can be known that the imaging device 3 includes a photographic lens group (not otherwise labeled) and an electronic photosensitive element IS. The photographic lens group sequentially includes a first lens E1, a diaphragm S1, a second lens E2, an aperture ST, a third lens E3, a diaphragm S2, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter element E7, a filter element E8, and an imaging surface IMG along the optical path from the object side to the image side. Among them, the electronic photosensitive element IS is disposed on the imaging surface IMG. The photographic lens group includes six lenses (E1, E2, E3, E4, E5, E6), and there are no other interpolated lenses between the lenses. Among them, there is an air gap on the optical axis between all adjacent lenses of the six lenses of the photographic lens group.

[0247] The first lens E1 has a negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, its image-side surface is concave near the optical axis, both of its surfaces are aspherical, and its object-side surface has two inflection points.

[0248] The second lens E2 has a positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, its image-side surface is concave near the optical axis, both of its surfaces are aspherical, and its object-side surface has an inflection point.

[0249] The third lens E3 has a positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, its image-side surface is convex near the optical axis, both of its surfaces are aspherical, and its image-side surface has an inflection point.

[0250] The fourth lens E4 has a positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, its image-side surface is convex near the optical axis, both of its surfaces are aspherical, its object-side surface has two inflection points, and its image-side surface has an inflection point.

[0251] The fifth lens E5 has a negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, its image-side surface is convex near the optical axis, both of its surfaces are aspherical, its object-side surface has an inflection point, its image-side surface has three inflection points, and its image-side surface has a critical point at the off-axis position.

[0252] The sixth lens E6 has a positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, its image-side surface is concave near the optical axis, both of its surfaces are aspherical, its object-side surface has an inflection point, its image-side surface has an inflection point, its object-side surface has a critical point at the off-axis position, and its image-side surface has a critical point at the off-axis position.

[0253] The material of the filter element E7 is glass. It is disposed between the sixth lens E6 and the imaging surface IMG and does not affect the focal length of the photographic lens group.

[0254] The material of the filter element E8 is glass. It is disposed between the filter element E7 and the imaging surface IMG and does not affect the focal length of the photographic lens group.

[0255] Please refer to Table 3A and Table 3B below.

[0256]

[0257]

[0258] In the third embodiment, the aspheric curve equation is expressed in the same form as in the first embodiment. In addition, the definitions described in Table 3C are the same as those in the first embodiment and will not be elaborated here.

[0259]

[0260]

[0261] <Fourth Embodiment>

[0262] Please refer to Figures 7 to 8 , where Figure 7 FIG. shows a schematic diagram of an imaging device according to the fourth embodiment of the present disclosure. Figure 8 From left to right are the spherical aberration, astigmatism, and distortion curves of the fourth embodiment. As Figure 7 can be seen, the imaging device 4 includes a photographic lens group (not otherwise labeled) and an electronic photosensitive element IS. The photographic lens group sequentially includes a first lens E1, a diaphragm S1, a second lens E2, an aperture ST, a third lens E3, a diaphragm S2, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter element E7, a filter element E8, and an imaging surface IMG along the optical path. Among them, the electronic photosensitive element IS is disposed on the imaging surface IMG. The photographic lens group includes six lenses (E1, E2, E3, E4, E5, E6), and there are no other interpolated lenses between the lenses. Among them, there is an air gap on the optical axis between all adjacent lenses of the six lenses of the photographic lens group.

[0263] The first lens E1 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. Both of its surfaces are aspherical.

[0264] 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. Both of its surfaces are aspherical.

[0265] 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. Both of its surfaces are aspherical.

[0266] The fourth lens E4 has a positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, its image-side surface is convex near the optical axis, both of its surfaces are aspherical, and its object-side surface has an inflection point.

[0267] The fifth lens E5 has a negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, its image-side surface is convex near the optical axis, both of its surfaces are aspherical, and its image-side surface has three inflection points.

[0268] The sixth lens E6 has a positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, its image-side surface is concave near the optical axis, both of its surfaces are aspherical, its object-side surface has two inflection points, its image-side surface has an inflection point, its object-side surface has a critical point off the axis, and its image-side surface has a critical point off the axis.

[0269] 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 photographic lens group.

[0270] The filter element E8 is made of glass. It is disposed between the filter element E7 and the imaging surface IMG and does not affect the focal length of the photographic lens group.

[0271] Please refer to Table 4A and Table 4B below for reference.

[0272]

[0273]

[0274] In the fourth embodiment, the curve equation of the aspherical surface is expressed in the form of the first embodiment. In addition, the definitions described in Table 4C are the same as those in the first embodiment and will not be elaborated here.

[0275]

[0276] <The Fifth Embodiment>

[0277] Please refer to Figures 9 to 10 , where Figure 9 FIG. shows a schematic diagram of an imaging device according to the fifth embodiment of the present disclosure. Figure 10 From left to right are the spherical aberration, astigmatism, and distortion curve graphs of the fifth embodiment. From Figure 9It can be known that the imaging device 5 includes a photographic lens group (not labeled separately) and an electronic photosensitive element IS. The photographic lens group sequentially includes a first lens E1, a diaphragm S1, a second lens E2, an aperture ST, a third lens E3, a diaphragm S2, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter element E7, a filter element E8, and an imaging surface IMG along the optical path from the object side to the image side. Among them, the electronic photosensitive element IS is disposed on the imaging surface IMG. The photographic lens group includes six lenses (E1, E2, E3, E4, E5, E6), and there are no other interpolated lenses between the lenses. Among them, there is an air gap on the optical axis between all adjacent lenses of the six lenses of the photographic lens group.

[0278] The first lens E1 has a negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, its image-side surface is concave near the optical axis, and both of its surfaces are aspherical.

[0279] The second lens E2 has a positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, its image-side surface is convex near the optical axis, both of its surfaces are aspherical, its image-side surface has an inflection point, and its image-side surface has a critical point at the off-axis position.

[0280] The third lens E3 has a positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, its image-side surface is concave near the optical axis, both of its surfaces are aspherical, its image-side surface has two inflection points, and its image-side surface has a critical point at the off-axis position.

[0281] The fourth lens E4 has a positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, its image-side surface is convex near the optical axis, both of its surfaces are aspherical, its object-side surface has two inflection points, and its image-side surface has an inflection point.

[0282] The fifth lens E5 has a negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, its image-side surface is convex near the optical axis, both of its surfaces are aspherical, its image-side surface has two inflection points, and its image-side surface has two critical points at the off-axis position.

[0283] The sixth lens E6 has a positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, its image-side surface is concave near the optical axis, both of its surfaces are aspherical, its object-side surface has two inflection points, its image-side surface has an inflection point, its object-side surface has two critical points at the off-axis position, and its image-side surface has a critical point at the off-axis position.

[0284] The material of the filter element E7 is glass. It is disposed between the sixth lens E6 and the imaging surface IMG and does not affect the focal length of the photographic lens group.

[0285] The material of the filter element E8 is glass. It is disposed between the filter element E7 and the imaging surface IMG, and does not affect the focal length of the photographic lens group.

[0286] Please refer to Table 5A and Table 5B below.

[0287]

[0288]

[0289] In the fifth embodiment, the aspheric curve equation is expressed in the same form as that in the first embodiment. In addition, the definitions described in Table 5C are the same as those in the first embodiment, and will not be elaborated here.

[0290]

[0291] <Sixth Embodiment>

[0292] Please refer to Figures 11 to 12 , wherein Figure 11 FIG. shows a schematic diagram of an imaging device according to the sixth embodiment of the present disclosure. Figure 12 From left to right are the spherical aberration, astigmatism, and distortion curves of the sixth embodiment. As can be seen from Figure 11 , the imaging device 6 includes a photographic lens group (not labeled separately) and an electronic photosensitive element IS. The photographic lens group sequentially includes a first lens E1, a diaphragm S1, a second lens E2, an aperture ST, a third lens E3, a diaphragm S2, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter element E7, a filter element E8, and an imaging surface IMG along the optical path from the object side to the image side. Among them, the electronic photosensitive element IS is disposed on the imaging surface IMG. The photographic lens group includes six lenses (E1, E2, E3, E4, E5, E6), and there are no other interpolated lenses between the lenses. Among them, there is an air gap on the optical axis between all adjacent lenses of the six lenses of the photographic lens group.

[0293] The first lens E1 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. Both of its surfaces are aspherical.

[0294] The second lens E2 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. Both of its surfaces are aspherical.

[0295] 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 concave near the optical axis. Both of its surfaces are aspherical. Its image-side surface has two inflection points, and its image-side surface has a critical point at the off-axis position.

[0296] The fourth lens E4 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. Both of its surfaces are aspherical. Its object-side surface has two inflection points, and its image-side surface has one inflection point.

[0297] The fifth lens E5 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. Both of its surfaces are aspherical, and its image-side surface has four inflection points.

[0298] The sixth lens E6 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. Both of its surfaces are aspherical. Its object-side surface has two inflection points, its image-side surface has one inflection point. Its object-side surface has two critical points off the axis, and its image-side surface has one critical point off the axis.

[0299] 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 photographic lens group.

[0300] The filter element E8 is made of glass. It is disposed between the filter element E7 and the imaging surface IMG and does not affect the focal length of the photographic lens group.

[0301] Please refer to Table 6A and Table 6B below.

[0302]

[0303]

[0304] In the sixth embodiment, the curve equation of the aspherical surface is expressed in the same form as that of the first embodiment. In addition, the definitions described in Table 6C are the same as those of the first embodiment and will not be elaborated here.

[0305]

[0306] <Seventh Embodiment>

[0307] Please refer to Figures 13 to 14 , where Figure 13 FIG. shows a schematic diagram of an image pickup device according to the seventh embodiment of the present disclosure. Figure 14 From left to right are the spherical aberration, astigmatism, and distortion curves of the seventh embodiment. Figure 13It can be known that the imaging device 7 includes a photographic lens group (not otherwise labeled) and an electronic photosensitive element IS. The photographic lens group sequentially includes a first lens E1, a second lens E2, an aperture ST, a third lens E3, a diaphragm S1, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter element E7, and an imaging surface IMG along the optical path from the object side to the image side. Among them, the electronic photosensitive element IS is disposed on the imaging surface IMG. The photographic lens group includes six lenses (E1, E2, E3, E4, E5, E6), and there are no other interpolated lenses between the lenses. Among them, there is an air gap on the optical axis between all adjacent lenses of the six lenses of the photographic lens group.

[0308] The first lens E1 has a negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, its image-side surface is concave near the optical axis, and both of its surfaces are aspherical surfaces.

[0309] The second lens E2 has a positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, its image-side surface is concave near the optical axis, both of its surfaces are aspherical surfaces, and its object-side surface has an inflection point.

[0310] The third lens E3 has a positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, its image-side surface is convex near the optical axis, and both of its surfaces are aspherical surfaces.

[0311] The fourth lens E4 has a positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, its image-side surface is convex near the optical axis, both of its surfaces are aspherical surfaces, its object-side surface has an inflection point, and its image-side surface has an inflection point.

[0312] The fifth lens E5 has a negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, its image-side surface is convex near the optical axis, both of its surfaces are aspherical surfaces, its object-side surface has three inflection points, its image-side surface has four inflection points, and its image-side surface has two critical points off the axis.

[0313] The sixth lens E6 has a positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, its image-side surface is concave near the optical axis, both of its surfaces are aspherical surfaces, its object-side surface has two inflection points, its image-side surface has two inflection points, its object-side surface has a critical point off the axis, and its image-side surface has a critical point off the axis.

[0314] The material of the filter element E7 is glass. It is disposed between the sixth lens E6 and the imaging surface IMG and does not affect the focal length of the photographic lens group.

[0315] Please refer to Table 7A and Table 7B below for reference.

[0316]

[0317]

[0318]

[0319] In the seventh embodiment, the aspheric curve equation is expressed in the same form as in the first embodiment. In addition, the definitions described in Table 7C are the same as those in the first embodiment and will not be elaborated here.

[0320]

[0321] <Eighth Embodiment>

[0322] Please refer to Figures 15 to 16 , where Figure 15 FIG. shows a schematic diagram of an imaging device according to the eighth embodiment of the present disclosure. Figure 16 From left to right are the spherical aberration, astigmatism, and distortion curves of the eighth embodiment. As can be seen from Figure 15 , the imaging device 8 includes a photographic lens group (not otherwise labeled) and an electronic photosensitive element IS. The photographic lens group sequentially includes a first lens E1, a second lens E2, an aperture ST, a third lens E3, a stop S1, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter element E7, and an imaging surface IMG along the optical path from the object side to the image side. Among them, the electronic photosensitive element IS is disposed on the imaging surface IMG. The photographic lens group includes six lenses (E1, E2, E3, E4, E5, E6), and there are no other interpolated lenses between the lenses. Among them, there is an air gap on the optical axis between all adjacent lenses of the six lenses of the photographic lens group.

[0323] The first lens E1 has a negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, its image-side surface is concave near the optical axis, both of its surfaces are aspheric, and its object-side surface has two inflection points.

[0324] The second lens E2 has a positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, its image-side surface is concave near the optical axis, both of its surfaces are aspheric, and its object-side surface has an inflection point.

[0325] The third lens E3 has a positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, its image-side surface is convex near the optical axis, and both of its surfaces are aspheric.

[0326] The fourth lens E4 has a negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, its image-side surface is convex near the optical axis, both of its surfaces are aspheric, and its image-side surface has an inflection point.

[0327] The fifth lens E5 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. Both of its surfaces are aspherical. Its object-side surface has an inflection point, and its image-side surface has four inflection points.

[0328] The sixth lens E6 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. Both of its surfaces are aspherical. Its object-side surface has two inflection points, its image-side surface has three inflection points, and its image-side surface has two critical points off the axis.

[0329] 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 photographic lens group.

[0330] Please refer to Table 8A and Table 8B below for reference.

[0331]

[0332]

[0333] In the eighth embodiment, the curve equation of the aspherical surface is expressed in the same form as that of the first embodiment. In addition, the definitions described in Table 8C are the same as those of the first embodiment and will not be elaborated here.

[0334]

[0335] <Ninth Embodiment>

[0336] Please refer to Figures 17 to 18 , where Figure 17 FIG. shows a schematic diagram of an imaging device according to the ninth embodiment of the present disclosure. Figure 18 From left to right are the spherical aberration, astigmatism, and distortion curves of the ninth embodiment. As can be seen from Figure 17 , the imaging device 9 includes a photographic lens group (not labeled separately) and an electronic photosensitive element IS. The photographic lens group sequentially includes a first lens E1, a diaphragm S1, a second lens E2, an aperture ST, a third lens E3, a diaphragm S2, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter element E7, a filter element E8, and an imaging surface IMG along the optical path from the object side to the image side. Among them, the electronic photosensitive element IS is disposed on the imaging surface IMG. The photographic lens group includes six lenses (E1, E2, E3, E4, E5, E6), and there are no other interpolated lenses between the lenses. Among them, there is an air gap on the optical axis between all adjacent lenses of the six lenses of the photographic lens group.

[0337] The first lens E1 has a negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, its image-side surface is concave near the optical axis, and both of its surfaces are aspherical.

[0338] The second lens E2 has a positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, its image-side surface is concave near the optical axis, both of its surfaces are aspherical, and its object-side surface has an inflection point.

[0339] The third lens E3 has a positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, its image-side surface is convex near the optical axis, and both of its surfaces are aspherical.

[0340] The fourth lens E4 has a positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, its image-side surface is convex near the optical axis, both of its surfaces are aspherical, its object-side surface has two inflection points, and its image-side surface has an inflection point.

[0341] The fifth lens E5 has a negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, its image-side surface is convex near the optical axis, both of its surfaces are aspherical, and its image-side surface has two inflection points.

[0342] The sixth lens E6 has a positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, its image-side surface is concave near the optical axis, both of its surfaces are aspherical, its object-side surface has two inflection points, its image-side surface has two inflection points, its object-side surface has a critical point off the axis, and its image-side surface has a critical point off the axis.

[0343] The filter element E7 is made of glass and is disposed between the sixth lens E6 and the imaging surface IMG, and does not affect the focal length of the photographic lens group.

[0344] The filter element E8 is made of glass and is disposed between the filter element E7 and the imaging surface IMG, and does not affect the focal length of the photographic lens group.

[0345] Please refer to Table 9A and Table 9B below for reference.

[0346]

[0347]

[0348] In the ninth embodiment, the curve equation of the aspherical surface is expressed in the same form as that of the first embodiment. In addition, the definitions described in Table 9C are the same as those of the first embodiment and will not be elaborated here.

[0349]

[0350] <Tenth Embodiment>

[0351] Please refer to Figure 19 , which shows a perspective schematic view of an imaging device according to the tenth embodiment of the present disclosure. In this embodiment, the imaging device 100 is a camera module. The imaging device 100 includes an imaging lens 101, a driving device 102, an electronic photosensitive element 103, and an image stabilization module 104. The imaging lens 101 includes the photographic lens group of the first embodiment above, a lens barrel (not separately labeled) for carrying the photographic lens group, and a support device (Holder Member, not separately labeled). The imaging lens 101 can also be configured with the photographic lens groups of the other embodiments above. The present disclosure is not limited thereto. The imaging device 100 uses the imaging lens 101 to converge light to generate an image, and cooperates with the driving device 102 to perform image focusing. Finally, the image is formed on the electronic photosensitive element 103 and can be output as image data.

[0352] The driving device 102 can have an auto-focus function, and its driving method can use driving systems such as a voice coil motor (VCM), a micro electro-mechanical system (MEMS), a piezoelectric system, and a shape memory alloy. The driving device 102 can enable the imaging lens 101 to obtain a better imaging position, and can provide clear images for the object to be photographed in different object distance states. In addition, the imaging device 100 is 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 photographic lens group, and can truly present the good imaging quality of the photographic lens group.

[0353] The image stabilization module 104 is, for example, an accelerometer, a gyroscope, or a Hall effect sensor. The driving device 102 can cooperate with the image stabilization module 104 to jointly serve as an optical image stabilization (OIS) device, which compensates for the blurred image generated by shaking during shooting by adjusting the changes of the imaging lens 101 in different axial directions, or uses image compensation technology in image software to provide an electronic image stabilization (EIS) function, further improving the imaging quality in dynamic and low-light scenes.

[0354] <Eleventh Embodiment>

[0355] Please refer to Figures 20 to 21 , wherein Figure 20A perspective view of one side of an electronic device according to the eleventh embodiment of the present disclosure, and Figure 21 illustrates Figure 20 a perspective view of the other side of the electronic device.

[0356] In this embodiment, the electronic device 200 is a smart phone. The electronic device 200 includes the imaging device 100, the imaging devices 100a, 100b, 100c of the tenth embodiment, and the display module 201. As Figure 20 shown, the imaging device 100, the imaging devices 100a and 100b are all disposed on the same side of the electronic device 200 and are all single-focus. As Figure 21 shown, the imaging device 100c and the display module 201 are both disposed on the other side of the electronic device 200. The imaging device 100c can be used as a front camera to provide a self-shooting function, but the present disclosure is not limited thereto. In addition, the imaging devices 100a, 100b and 100c can all include the photographic lens group of the present disclosure and can all have a structural configuration similar to that of the imaging device 100. Specifically, each of the imaging devices 100a, 100b and 100c can include an imaging lens, a driving device, an electronic photosensitive element and an image stabilization module. Among them, the imaging lenses of the imaging devices 100a, 100b and 100c can each include an optical lens group such as the photographic lens group of the present disclosure, a lens barrel for carrying the optical lens group, and a supporting device.

[0357] The imaging device 100 is an ultra-wide-angle imaging device, the imaging device 100a is a telephoto imaging device, the imaging device 100b is a wide-angle imaging device, and the imaging device 100c is a wide-angle imaging device. The imaging devices 100, 100a and 100b of this embodiment have different viewing angles, so that the electronic device 200 can provide different magnification ratios to achieve the shooting effect of optical zoom. In addition, as Figure 21 shown, the opening of the imaging device 100c can be non-circular, and the lens barrel or lens in the imaging device 100c can be cut at the outer diameter to have a cut edge to match the non-circular opening. Thereby, the uniaxial length of the imaging device 100c can be further reduced, which is beneficial to reducing the lens volume, increasing the area ratio of the display module 201 relative to the electronic device 200, and reducing the thickness of the electronic device 200, further achieving module miniaturization. The above electronic device 200 is taken as an example of including a plurality of imaging devices 100, 100a, 100b, 100c, but the number and configuration of the imaging devices are not used to limit the present disclosure.

[0358] <Twelfth Embodiment>

[0359] Please refer to Figures 22 to 24 , whereFigure 22 A perspective view showing one side of an electronic device according to the twelfth embodiment of the present disclosure, Figure 23 showing Figure 22 a perspective view of the other side of the electronic device, and Figure 24 showing Figure 22 a system block diagram of the electronic device.

[0360] In this embodiment, the electronic device 300 is a smart phone. The electronic device 300 includes the imaging device 100, the imaging device 100d, the imaging device 100e, the imaging device 100f, the imaging device 100g, the flash module 301, the focus assist module 302, the image signal processor 303, the display module 304, and the image software processor 305 of the tenth embodiment. The imaging device 100 and the imaging device 100d are both disposed on the same side of the electronic device 300. The focus assist module 302 can be a laser rangefinder or a time-of-flight (ToF) module, but the present disclosure is not limited thereto. The imaging device 100e, the imaging device 100f, the imaging device 100g, and the display module 304 are all disposed on the other side of the electronic device 300, and the display module 304 can be a user interface, so that the imaging device 100e, the imaging device 100f, and the imaging device 100g can be used as front cameras to provide a self-shooting function, but the present disclosure is not limited thereto. In addition, the imaging device 100d, the imaging device 100e, the imaging device 100f, and the imaging device 100g can all include the photographic lens group of the present disclosure and can all have a structural configuration similar to that of the imaging device 100. Specifically, the imaging device 100d, the imaging device 100e, the imaging device 100f, and the imaging device 100g can each include an imaging lens, a driving device, an electronic photosensitive element, and an image stabilization module. Among them, the imaging lens of the imaging device 100d, the imaging device 100e, the imaging device 100f, and the imaging device 100g can each include an optical lens group such as the photographic lens group of the present disclosure, a lens barrel for carrying the optical lens group, and a support device.

[0361] The imaging device 100 is an ultra-wide-angle imaging device, the imaging device 100d is a wide-angle imaging device, the imaging device 100e is a wide-angle imaging device, the imaging device 100f is an ultra-wide-angle imaging device, and the imaging device 100g is a time-of-flight ranging imaging device. The imaging device 100 and the imaging device 100d in this embodiment have different viewing angles, enabling the electronic device 300 to provide different magnification ratios to achieve the shooting effect of optical zoom. In addition, the imaging device 100g can obtain the depth information of the image. The above-mentioned electronic device 300 takes the example of including multiple imaging devices 100, 100d, 100e, 100f, 100g, but the number and configuration of the imaging devices are not used to limit this disclosure.

[0362] When the user shoots the object 306, the electronic device 300 uses the imaging device 100 or the imaging device 100d to collect light and take an image, activates the flash module 301 for fill light, and uses the object distance information of the object 306 provided by the focus assist module 302 for rapid focusing. Coupled with the image signal processor 303 for image optimization processing, the image quality generated by the photographic lens group is further improved. The focus assist module 302 can adopt an infrared or laser focus assist system to achieve rapid focusing. In addition, the electronic device 300 can also use the imaging device 100e, the imaging device 100f or the imaging device 100g for shooting. The display module 304 can adopt a touch screen and cooperate with the diverse functions of the image software processor 305 for image shooting and image processing (or can use a physical shooting button for shooting). The image processed by the image software processor 305 can be displayed on the display module 304.

[0363] <The Thirteenth Embodiment>

[0364] Please refer to Figure 25 , which shows a three-dimensional schematic diagram of one side of an electronic device according to the thirteenth embodiment of this disclosure.

[0365] In this embodiment, the electronic device 400 is a smart phone. The electronic device 400 includes the imaging device 100, the imaging device 100h, the imaging device 100i, the flash module 401, the focus assist module, the image signal processor, the display module, and the image software processor (not shown) of the tenth embodiment. The imaging device 100, the imaging device 100h, and the imaging device 100i are all arranged on the same side of the electronic device 400, while the display module is arranged on the other side of the electronic device 400. And, the imaging device 100h and the imaging device 100i can both include the photographic lens group of this disclosure and can both have a structural configuration similar to that of the imaging device 100, which will not be elaborated here.

[0366] The imaging device 100 is an ultra-wide-angle imaging device, the imaging device 100h is a telephoto imaging device, and the imaging device 100i is a wide-angle imaging device. The imaging devices 100, 100h, and 100i in this embodiment have different viewing angles, enabling the electronic device 400 to provide different magnification ratios to achieve the shooting effect of optical zoom. In addition, the imaging device 100h is a telephoto imaging device with an optical path turning element configuration, such that the total length of the imaging device 100h is not limited by the thickness of the electronic device 400. Among them, the optical path turning element configuration of the imaging device 100h may, for example, have a structure similar to Figures 34 to 36 , and reference may be made to the foregoing corresponding Figures 34 to 36 description, which will not be elaborated herein. The above electronic device 400 takes the example of including multiple imaging devices 100, 100h, 100i, but the number and configuration of the imaging devices are not intended to limit this disclosure. When the user shoots an object, the electronic device 400 uses the imaging device 100, the imaging device 100h, or the imaging device 100i to collect light for imaging, activates the flash module 401 for fill light, and performs subsequent processing in a manner similar to the foregoing embodiments, which will not be elaborated herein.

[0367] <The Fourteenth Embodiment>

[0368] Please refer to Figure 26 for a perspective view showing one side of an electronic device according to the fourteenth embodiment of this disclosure.

[0369] In this embodiment, the electronic device 500 is a smart phone. The electronic device 500 includes the imaging device 100, the imaging device 100j, the imaging device 100k, the imaging device 100m, the imaging device 100n, the imaging device 100p, the imaging device 100q, the imaging device 100r, the imaging device 100s, the flash module 501, the focus assist module, the image signal processor, the display module, and an image software processor (not shown) of the tenth embodiment. The imaging device 100, the imaging device 100j, the imaging device 100k, the imaging device 100m, the imaging device 100n, the imaging device 100p, the imaging device 100q, the imaging device 100r, and the imaging device 100s are all disposed on the same side of the electronic device 500, while the display module is disposed on the other side of the electronic device 500. Moreover, the imaging device 100j, the imaging device 100k, the imaging device 100m, the imaging device 100n, the imaging device 100p, the imaging device 100q, the imaging device 100r, and the imaging device 100s may all include the photographic lens group of this disclosure and may all have a structural configuration similar to that of the imaging device 100, which will not be elaborated herein.

[0370] The imaging device 100 is an ultra-wide-angle imaging device, the imaging device 100j is a telephoto imaging device, the imaging device 100k is a telephoto imaging device, the imaging device 100m is a wide-angle imaging device, the imaging device 100n is a wide-angle imaging device, the imaging device 100p is an ultra-wide-angle imaging device, the imaging device 100q is a telephoto imaging device, the imaging device 100r is a telephoto imaging device, and the imaging device 100s is a time-of-flight ranging imaging device. The imaging devices 100, 100j, 100k, 100m, 100n, 100p, 100q, and 100r in this embodiment have different viewing angles, enabling the electronic device 500 to provide different magnification ratios to achieve the shooting effect of optical zoom. In addition, the imaging devices 100j and 100k can be telephoto imaging devices with an optical path turning element configuration. Among them, the optical path turning element configurations of the imaging devices 100j and 100k can, for example, have a structure similar to Figures 34 to 36 and can refer to the corresponding Figures 34 to 36 description above and will not be elaborated here. In addition, the imaging device 100s can obtain the depth information of the image. The above electronic device 500 takes the example of including multiple imaging devices 100, 100j, 100k, 100m, 100n, 100p, 100q, 100r, and 100s, but the number and configuration of the imaging devices are not used to limit this disclosure. When the user shoots an object, the electronic device 500 uses the imaging device 100, the imaging device 100j, the imaging device 100k, the imaging device 100m, the imaging device 100n, the imaging device 100p, the imaging device 100q, the imaging device 100r, or the imaging device 100s to collect light and take an image, activates the flash module 501 for fill light, and performs subsequent processing in a manner similar to the previous embodiment, which will not be elaborated here.

[0371] <Fifteenth Embodiment>

[0372] Please refer to Figures 27 to 29 where Figure 27 shows a perspective schematic diagram of an electronic device according to the fifteenth embodiment of this disclosure, Figure 28 shows Figure 27 a side view schematic diagram of the electronic device, and Figure 29 shows Figure 27 a top view schematic diagram of the electronic device.

[0373] In this embodiment, the electronic device 600 is a mobile vehicle, such as a car. The electronic device 600 includes multiple imaging devices 601, and these imaging devices 601 respectively include, for example, the photographic lens groups of this disclosure, which can be applied to, for example, a panoramic driving assistance system, a driving recorder, and a reverse imaging device. The imaging device 601 can be an ultra-wide-angle imaging device.

[0374] As Figures 27 to 29 shown, the imaging device 601 can be disposed, for example, at the front end, rear end, side, rearview mirror, and interior of the vehicle to capture images around the vehicle, which helps to identify road conditions outside the vehicle, thereby enabling the function of automatic assisted driving. In addition, the images can be combined into a panoramic view by an image software processor to provide images of the driver's blind spot, allowing the driver to control the situation around the vehicle body for easier driving and parking.

[0375] As Figure 28 shown, the imaging device 601 can be respectively disposed, for example, below the left and right rearview mirrors to capture image information within the ranges of the left and right adjacent lanes. As Figure 29 shown, the imaging device 601 can also be respectively disposed, for example, below the left and right rearview mirrors and inside the front and rear windshield, thereby helping the driver to obtain external space information outside the cockpit, providing more perspectives to reduce blind spots of vision and enhancing driving safety. The configuration of the imaging device in the figure is only an example, and the number, position, and image capture direction of the imaging device can be adjusted according to actual needs.

[0376] <Sixteenth Embodiment>

[0377] Please refer to Figure 30 , which shows a partial internal schematic diagram of an electronic device according to the sixteenth embodiment of the present disclosure.

[0378] In this embodiment, the electronic device 700 is a mobile vehicle, such as a car. The electronic device 700 includes an imaging device 701, and these imaging devices 701 include, for example, the photographic lens group of the present disclosure. The imaging device 701 is disposed near the instrument panel 702 or the center console 703 of the electronic device 700, but the present disclosure is not limited thereto. The imaging device 701 can be used as a sensing lens facing the driver for application in a Driver Monitoring System, and can judge the direction and closing condition of the driver's eyes through an infrared lens, or check whether the driver yawns and the position of his / her head to detect the mental state of the driver. The image captured by the imaging device 701 is as Figure 31 shown, which shows a schematic diagram of the image captured when the imaging device of the Figure 30 electronic device performs the detection function. Thereby, it can be detected whether the driver is distracted, fatigued, or dozing off and unable to drive, and then a signal is sent to a reminder or warning device (not shown) within the electronic device 700, or a signal is sent to a management system connected to the electronic device 700.

[0379] The imaging device disclosed herein is not limited to being applied to smartphones, cameras, or mobile vehicles. The imaging device can further be applied to a system for mobile focusing according to requirements, and has the characteristics of excellent aberration correction and good imaging quality. For example, the imaging device can be applied in various aspects to electronic devices such as three-dimensional (3D) image capture, digital cameras, mobile devices, tablet computers, smart TVs, network monitoring devices, dash cams, rearview imaging devices, multi-lens devices, identification systems, motion-sensing game consoles, and wearable devices. The foregoing electronic devices are only exemplary illustrations of the actual application examples of the present disclosure, and do not limit the application scope of the imaging device of the present disclosure.

[0380] Although the present disclosure has been disclosed above with the foregoing preferred embodiments, it is not intended to limit the present disclosure. Any person skilled in the art can make some changes and modifications without departing from the spirit and scope of the present disclosure. Therefore, the scope of patent protection of the present disclosure shall be determined by the claims appended to this specification.

Claims

1. A photographic lens assembly, characterized in that: It includes six lenses. The six lenses are, in order from the object side to the image side along the optical path, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. And the six lenses respectively have an object-side surface facing the object side direction and an image-side surface facing the image side direction; Among them, the object-side surface of the first lens is convex near the optical axis, the object-side surface of the second lens is convex near the optical axis, the fifth lens has a negative refractive power, the object-side surface of the fifth lens is concave near the optical axis, the image-side surface of the fifth lens is convex near the optical axis, and the image-side surface of the sixth lens has at least one inflection point; Among them, the photographic lens group further includes an aperture, and the aperture is disposed between the second lens and the third lens; Among them, the distance from the object-side surface of the first lens to an imaging surface on the optical axis is TL, the focal length of the photographic lens group is f, the focal length of the second lens is f2, the focal length of the sixth lens is f6, and the maximum viewing angle in the photographic lens group is FOV, which satisfies the following conditions: 2.80 < TL / f < 5.50; 1.10 < |f2 / f6| < 25.00; and 105.0 degrees < FOV < 145.0 degrees.

2. The photographic lens assembly according to claim 1, characterized in that: The first lens has a negative refractive power, the sixth lens has a positive refractive power, the object-side surface of the sixth lens is convex near the optical axis, and there is an air gap on the optical axis between all adjacent lenses in the photographic lens group.

3. The photographic lens assembly according to claim 1, characterized in that: The image-side surface of the first lens is concave near the optical axis, the image-side surface of the fourth lens is convex near the optical axis, and the image-side surface of the sixth lens is concave near the optical axis; Among them, the f-number of the photographic lens group is Fno, which satisfies the following conditions: 1.50 < Fno < 2.

70.

4. The photographic lens assembly according to claim 1, characterized in that: The distance from the object-side surface of the first lens to the imaging surface on the optical axis is TL, and the maximum imaging height of the photographic lens group is ImgH, which satisfies the following conditions: TL / ImgH < 3.

30.

5. The photographic lens assembly according to claim 1, characterized in that: The spacing distance between the third lens and the fourth lens on the optical axis is T34, the spacing distance between the fifth lens and the sixth lens on the optical axis is T56, 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 first lens is R2, which satisfies the following conditions: 0 < T56 / T34 < 5.50; and 0 < |R1 / R2| < 25.

0.

6. The photographic lens assembly according to claim 1, characterized in that: The focal length of the first lens is f1, the focal length of the second lens is f2, the focal length of the third lens is f3, and the focal length of the sixth lens is f6, which satisfies the following conditions: 1.70 < (|f2| + |f3|) / (|f1| + |f6|).

7. The photographic lens assembly according to claim 1, characterized in that: The spacing distance between the second lens and the third lens on the optical axis is T23, and the thickness of the second lens on the optical axis is CT2, which satisfies the following conditions: 0 < T23 / CT2 < 1.

10.

8. The photographic lens assembly according to claim 1, characterized in that: At least three lenses in the photographic lens group are made of plastic material; Wherein, the Abbe number of the first lens is V1, the Abbe number of the second lens is V2, the Abbe number of the fifth lens is V5, the distance from the image-side surface of the sixth lens to the imaging surface on the optical axis is BL, and the thickness of the fifth lens on the optical axis is CT5, which satisfy the following conditions: 0.30 < (V2 + V5) / V1 < 1.30; and 0.5 < BL / CT5 < 8.

00.

9. The photographic lens assembly according to claim 1, characterized in that: The thickness of the third lens on the optical axis is CT3, the distance parallel to the optical axis between the position of the maximum effective radius of the object-side surface of the third lens and the position of the maximum effective radius of the image-side surface of the third lens is ET3, the radius of curvature of the object-side surface of the sixth lens is R11, and the radius of curvature of the image-side surface of the sixth lens is R12, which satisfy the following conditions: 0.80 < CT3 / ET3 < 2.00; and (R11 + R12) / (R11 - R12) < -0.

55.

10. The photographic lens assembly according to claim 1, characterized in that: The displacement parallel to the optical axis from the intersection point of the object-side surface of the third lens on the optical axis to the position of the maximum effective radius of the object-side surface of the third lens is SAG3R1, and the displacement parallel to the optical axis from the intersection point of the image-side surface of the fifth lens on the optical axis to the position of the maximum effective radius of the image-side surface of the fifth lens is SAG5R2, which satisfy the following conditions: -1.00 < SAG3R1 / SAG5R2 < 0.

50.

11. An imaging device, characterized in that: Comprising: The photographic lens group according to claim 1; and An electronic photosensitive element disposed on the imaging surface of the photographic lens group.

12. An electronic device, characterized in that: Comprising: The imaging device according to claim 11.

13. A photographic lens assembly, characterized in that: Comprising six lenses, and the six lenses are, in order from the object side to the image side along the optical path, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, and the six lenses respectively have an object-side surface facing the object side and an image-side surface facing the image side; Wherein, the object-side surface of the second lens is convex near the optical axis, and the image-side surface of the sixth lens has at least one inflection point; Wherein, the distance from the object-side surface of the first lens to an imaging surface on the optical axis is TL, the focal length of the photographic lens group is f, the focal length of the first lens is f1, the focal length of the second lens is f2, the focal length of the third lens is f3, the focal length of the fifth lens is f5, the focal length of the sixth lens is f6, the radius of curvature of the object-side surface of the first lens is R1, 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 fifth lens is R9, the radius of curvature of the image-side surface of the fifth lens is R10, the radius of curvature of the object-side surface of the sixth lens is R11, and the radius of curvature of the image-side surface of the sixth lens is R12, which satisfy the following conditions: 2.00 < TL / f < 5.40; (R9 + R10) / (R9 - R10) < -1.60; 0.85 < (|f1| + |f2|) / |f5| < 10.50; (R11 + R12) / (R11 - R12) < -0.55; 1.70 < (|f2| + |f3|) / (|f1| + |f6|); and -0.15 < R3 / R1。 14. The photographic lens assembly according to claim 13, characterized in that: The first lens has a negative refractive power, the object-side surface of the first lens is convex near the optical axis, the sixth lens has a positive refractive power, the object-side surface of the sixth lens is convex near the optical axis, and at least two lenses in the photographic lens group are made of the same plastic material.

15. The photographic lens assembly according to claim 13, characterized in that: The distance from the object-side surface of the first lens to the imaging surface on the optical axis is TL, and the maximum imaging height of the photographic lens group is ImgH, which satisfies the following conditions: 1.10 < TL / ImgH < 2.

90.

16. The photographic lens assembly according to claim 13, characterized in that: The focal length of the second lens is f2, the focal length of the sixth lens is f6, the thickness of the first lens on the optical axis is CT1, and the thickness of the second lens on the optical axis is CT2, which satisfies the following conditions: 1.10 < |f2 / f6| < 25.00; and 0 < CT1 / CT2 < 1.

20.

17. The photographic lens assembly according to claim 13, characterized in that: The distance between the second lens and the third lens on the optical axis is T23, the distance between the fifth lens and the sixth lens on the optical axis is T56, the distance from the object-side surface of the first lens to the imaging surface on the optical axis is TL, the aperture value of the photographic lens group is Fno, and the focal length of the photographic lens group is f, which satisfies the following conditions: 0 < T56 / T23 < 5.50; and 1.30 < TL×Fno / f < 2.

80.

18. The photographic lens assembly according to claim 13, characterized in that: It further includes a diaphragm, where the diaphragm is disposed in the object-side direction of the fourth lens; Wherein, 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 first lens is R2, which satisfies the following conditions: 0 < |R1 / R2| < 15.

0.

19. The photographic lens assembly according to claim 13, characterized in that: The maximum effective radius of the image-side surface of the fifth lens is Y5R2, the maximum effective radius of the object-side surface of the sixth lens is Y6R1, the displacement amount parallel to the optical axis from the intersection point of the object-side surface of the sixth lens on the optical axis to the position of the maximum effective radius of the object-side surface of the sixth lens is SAG6R1, and the thickness of the sixth lens on the optical axis is CT6, which satisfies the following conditions: 1.05 < Y6R1 / Y5R2 < 1.80; and 0 < SAG6R1 / CT6 < 0.

70.

20. The photographic lens assembly according to claim 13, characterized in that: The maximum absolute value of the distortion aberration on the imaging surface within the maximum field of view of the photographic lens group is |DIST|max, which satisfies the following conditions: |DIST|max < 50%.

21. A photographic lens assembly, characterized in that: It includes six lenses. The six lenses are, in order from the object side to the image side along the optical path, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens, and the six lenses respectively have an object-side surface facing the object side and an image-side surface facing the image side; Wherein, the object-side surface of the second lens is convex near the optical axis, and the image-side surface of the sixth lens has at least one inflection point; Wherein, the distance from the object side surface of the first lens to an imaging plane on the optical axis is TL, the focal length of the photographic lens group is f, the focal length of the first lens is f1, the focal length of the second lens is f2, the focal length of the fifth lens is f5, the radius of curvature of the object side surface of the first lens is R1, the radius of curvature of the object side surface of the fifth lens is R9, the radius of curvature of the image side surface of the fifth lens is R10, the distance between the fourth lens and the fifth lens on the optical axis is T45, the distance between the fifth lens and the sixth lens on the optical axis is T56, and they satisfy the following conditions: 3.00 < TL / f < 5.40; (R9 + R10) / (R9 - R10) < -1.90; 0.85 < (|f1| + |f2|) / |f5| < 10.50; 1.80 < |f2 / f1| < 25.00; 0 < T56 / T45 < 2.30; and -0.10 < f / R1.

22. The photographic lens assembly according to claim 21, characterized in that: The first lens has a negative refractive power, the object side surface of the first lens is convex near the optical axis, the fifth lens has a negative refractive power, the sixth lens has a positive refractive power, the object side surface of the sixth lens is convex near the optical axis, and there is at least one critical point on the off-axis of the image side surface of the sixth lens.

23. The photographic lens assembly according to claim 21, characterized in that: The distance from the object side surface of the first lens to the imaging plane on the optical axis is TL, the aperture value of the photographic lens group is Fno, the focal length of the photographic lens group is f, the radius of curvature of the object side surface of the first lens is R1, the radius of curvature of the object side surface of the second lens is R3, and they satisfy the following conditions: 1.30 < TL×Fno / f < 3.00; and -0.10 < R3 / R1 < 70.

00.

24. The photographic lens assembly according to claim 21, characterized in that: The distance between the first lens and the second lens on the optical axis is T12, the distance between the second lens and the third lens on the optical axis is T23, the thickness of the first lens on the optical axis is CT1, the thickness of the third lens on the optical axis is CT3, and they satisfy the following conditions: 1.10 < T12 / T23; and 1.05 < CT3 / CT1.

25. The photographic lens assembly according to claim 21, characterized in that: The maximum viewing angle in the photographic lens group is FOV, the radius of curvature of the object side surface of the sixth lens is R11, the radius of curvature of the image side surface of the sixth lens is R12, and they satisfy the following conditions: 100.0 degrees < FOV < 150.0 degrees; and (R11 + R12) / (R11 - R12) < -0.

55.

26. The photographic lens assembly according to claim 21, characterized in that: The distance from the object side surface of the first lens to the imaging plane on the optical axis is TL, the maximum imaging height of the photographic lens group is ImgH, and they satisfy the following conditions: 1.85 < TL / ImgH < 2.

90.

27. The photographic lens assembly according to claim 21, characterized in that: The maximum value of the thickness of the single lens on the optical axis among all the lenses of the photographic lens group is CTmax, the maximum value of the distance between all adjacent lenses on the optical axis in the photographic lens group is ATmax, the focal length of the second lens is f2, the focal length of the fifth lens is f5, and they satisfy the following conditions: 0.85 < CTmax / ATmax; and 0.90 < |f2 / f5|.

28. The photographic lens assembly according to claim 21, characterized in that: The displacement amount parallel to the optical axis from the intersection point of the image-side surface of the first lens on the optical axis to the maximum effective radius position of the image-side surface of the first lens is SAG1R2, the thickness of the first lens on the optical axis is CT1, the distance parallel to the optical axis between the maximum effective radius position of the object-side surface of the first lens and the maximum effective radius position of the image-side surface of the first lens is ET1, and the distance parallel to the optical axis between the maximum effective radius position of the object-side surface of the second lens and the maximum effective radius position of the image-side surface of the second lens is ET2, which satisfy the following conditions: 1.10 < SAG1R2 / CT1 < 2.50; and 0.3 < ET2 / ET1 < 1.

4.

29. The photographic lens assembly according to claim 21, characterized in that: The distance from the object-side surface of the first lens to the imaging surface on the optical axis is TL, the focal length of the photographic lens group is f, the focal length of the first lens is f1, the focal length of the second lens is f2, the focal length of the third lens is f3, the focal length of the fifth lens is f5, the focal length of the sixth lens is f6, the maximum viewing angle in the photographic lens group is FOV, the curvature radius of the object-side surface of the first lens is R1, the curvature radius of the object-side surface of the second lens is R3, the curvature radius of the object-side surface of the fifth lens is R9, the curvature radius of the image-side surface of the fifth lens is R10, the curvature radius of the object-side surface of the sixth lens is R11, the curvature radius of the image-side surface of the sixth lens is R12, the interval distance between the fourth lens and the fifth lens on the optical axis is T45, and the interval distance between the fifth lens and the sixth lens on the optical axis is T56, which satisfy the following conditions: 3.60 ≤ TL / f ≤ 5.10; 114.0 degrees ≤ FOV ≤ 130.3 degrees; 1.56 ≤ |f2 / f6| ≤ 5.55; 2.19 ≤ |f2 / f1| ≤ 5.83; 2.01 ≤ (|f1| + |f2|) / |f5| ≤ 5.39; 2.07 ≤ (|f2| + |f3|) / (|f1| + |f6|) ≤ 21.47; -5.25 ≤ (R9 + R10) / (R9 - R10) ≤ -2.37; -4.23 ≤ (R11 + R12) / (R11 - R12) ≤ -0.96; 0.13 ≤ T56 / T45 ≤ 0.87; 0.21 ≤ R3 / R1 ≤ 1.02; and 0.14 ≤ f / R1 ≤ 0.81.

Images