Photographic optical lens set and imaging device

Abstract

The present invention discloses a photographic optical lens set and an imaging device. The photographic optical lens set includes six lenses, which are the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens in order from the object side to the image side. The first lens has a negative refractive power, and its object side surface is concave near the optical axis, and its object side surface includes at least one convex critical point at the off-axis position. The object side surface of the second lens is convex near the optical axis. The third lens has a positive refractive power. The fourth lens has a negative refractive power. The fifth lens has a positive refractive power, and its image side surface is convex near the optical axis. The sixth lens has a negative refractive power, and its image side surface is concave near the optical axis, and its image side surface includes at least one convex surface at the off-axis position. When specific conditions are met, the overall volume of the photographic optical lens set can be reduced, the miniaturization of the photographic optical lens set can be achieved, and a more appropriate balance can be obtained between chromatic aberration and astigmatism. The present invention also discloses an imaging device having the above-mentioned photographic optical lens set.

Description

[0001] This application is a divisional application of a patent application with an application date of September 26, 2018 (divisional filing date of April 27, 2022), application number 201811123324.9 (divisional application number 202210452765.3), and invention name “Photographic lens group, imaging device and electronic device”. Technical Field

[0002] The invention relates to a photographic optical lens set and an image capturing device, and in particular to a miniaturized photographic optical lens set and an image capturing device applied to an electronic device. Background Art

[0003] As semiconductor manufacturing technology becomes more sophisticated, the performance of electronic photosensitive elements has been improved, and the pixels can reach a smaller size. Therefore, optical lenses with high imaging quality have become an indispensable part. As technology changes with each passing day, the application range of electronic devices equipped with optical lenses has become wider, and the requirements for optical lenses have become more diverse. Since it is difficult for optical lenses in the past to strike a balance between the requirements of imaging quality, sensitivity, aperture size, volume or viewing angle, an optical lens that meets the above requirements has become the goal of the industry. Summary of the invention

[0004] The present invention provides a photographic optical lens set and an imaging device, which can reduce the optical effective radius of the first lens by configuring the surface shape of the first lens, thereby helping to reduce the overall volume of the photographic optical lens set, thereby achieving miniaturization of the photographic optical lens set. Furthermore, by configuring the second lens, the fourth lens, and the sixth lens with low Abbe numbers, a more appropriate balance can be obtained between chromatic aberration and astigmatism.

[0005] According to the present invention, a photographic optical lens group is provided, which includes six lenses, including a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens in order from the object side to the image side. The first lens has a negative refractive power, and its object side surface is concave near the optical axis, and the object side surface of the first lens includes at least one convex critical point at an off-axis position. The object side surface of the second lens is convex near the optical axis. The third lens has a positive refractive power. The fourth lens has a negative refractive power. The fifth lens has a positive refractive power, and its image side surface is convex near the optical axis. The sixth lens has a negative refractive power, and its image side surface is concave near the optical axis, and the image side surface of the sixth lens includes at least one convex surface at an off-axis position. The total number of lenses of the photographic optical lens group is six. The photographic optical lens group further includes an aperture, which is placed between the second lens and the third lens. The Abbe number of the second lens is V2, the Abbe number of the fourth lens is V4, the Abbe number of the sixth lens is V6, the refractive index of the sixth lens is N6, the aperture value of the photographic optical lens group is Fno, the maximum optical effective radius of the object side surface of the first lens is Y11, the maximum optical effective radius of the image side surface of the sixth lens is Y62, the curvature radius of the object side surface of the first lens is R1, the maximum image height of the photographic optical lens group is ImgH, the curvature radius of the object side surface of the second lens is R3, the curvature radius of the image side surface of the second lens is R4, and the distance from the object side surface of the first lens to an imaging plane on the optical axis is TL, which satisfies the following conditions:

[0006] 30 <V2+V4+V6<85;

[0007] 5 <V6 / N6≤14.34;

[0008] 1.0 <Fno≤2.65;

[0009] 0.50 <Y11 / Y62≤1.12;

[0010] -3.0 <R1 / ImgH<0;

[0011] |R3 / R4|≤1.15; and

[0012] 1.0 <TL / ImgH<2.2。

[0013] According to the present invention, there is further provided an image capturing device, comprising the photographic optical lens set and an electronic photosensitive element as described in the previous paragraph, wherein the electronic photosensitive element is disposed on the imaging surface of the photographic optical lens set.

[0014] When V2+V4+V6 meets the above conditions, a more appropriate balance can be achieved between chromatic aberration and astigmatism.

[0015] When V6 / N6 meets the above conditions, a more appropriate balance between chromatic aberration and astigmatism can be achieved.

[0016] When Fno meets the above conditions, it can ensure that the amount of light entering is sufficient to provide better imaging quality for applications such as night shooting.

[0017] When Y11 / Y62 meets the above conditions, the total length of the photographic optical lens group can be shortened, making it easier to achieve miniaturization of the photographic optical lens group.

[0018] When R1 / ImgH meets the above conditions, the first lens can guide light with a large viewing angle to enter, which helps to expand the viewing angle of the photographic optical lens group.

[0019] When |R3 / R4| satisfies the above conditions, the structure and optics matching between the first lens and the second lens can be more suitable.

[0020] When TL / ImgH meets the above conditions, the total length of the photographic optical lens group can be shortened, and the photographic optical lens group can be further miniaturized. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of an image capturing device according to a first embodiment of the present invention is shown;

[0022] Figure 2 From left to right are the spherical aberration, astigmatism and distortion curves of the first embodiment;

[0023] Figure 3 A schematic diagram of an image capturing device according to a second embodiment of the present invention is shown;

[0024] Figure 4 From left to right are the spherical aberration, astigmatism and distortion curves of the second embodiment;

[0025] Figure 5 A schematic diagram of an image capturing device according to a third embodiment of the present invention is shown;

[0026] Figure 6 From left to right are the spherical aberration, astigmatism and distortion curves of the third embodiment;

[0027] Figure 7 A schematic diagram of an image capturing device according to a fourth embodiment of the present invention is shown;

[0028] Figure 8 From left to right are the spherical aberration, astigmatism and distortion curves of the fourth embodiment;

[0029] Fig. 9 A schematic diagram of an imaging device according to a fifth embodiment of the present invention is shown;

[0030] Fig.10 From left to right are the spherical aberration, astigmatism and distortion curves of the fifth embodiment;

[0031] Fig.11 A schematic diagram of an image capturing device according to a sixth embodiment of the present invention is shown;

[0032] Fig.12 From left to right are the spherical aberration, astigmatism and distortion curves of the sixth embodiment;

[0033] Fig.13 A schematic diagram of an image capturing device according to a seventh embodiment of the present invention is shown;

[0034] Fig.14 From left to right are the spherical aberration, astigmatism and distortion curves of the seventh embodiment;

[0035] Fig.15A Draw according to Figure 1 A schematic diagram of Y11 in the photographic optical lens set of the first embodiment;

[0036] Fig. 15B Draw according to Figure 1 A schematic diagram of Y62 in the photographic optical lens assembly of the first embodiment;

[0037] Fig.16 A schematic three-dimensional diagram of an image capturing device according to an eighth embodiment of the present invention is shown;

[0038] Fig.17A A schematic diagram showing one side of an electronic device according to a ninth embodiment of the present invention is shown;

[0039] Fig. 17B Draw according to Fig.17A A schematic diagram of the other side of the electronic device;

[0040] Fig. 17C Draw according to Fig.17A A system diagram of an electronic device;

[0041] Fig.18A A schematic diagram showing one side of an electronic device according to a tenth embodiment of the present invention;

[0042] Fig.18B Draw according to Fig.18A A schematic diagram of the other side of the electronic device; and

[0043] Fig.19 A schematic diagram of an electronic device according to an eleventh embodiment of the present invention is shown.

[0044]

Explanation of symbols

[0045] Image capturing device: 10, 10a, 10b, 10c, 10d, 10e, 10f, 41

[0046] Imaging lens: 11

[0047] Drive unit group: 12

[0048] Electronic photosensitive element: 13, 190, 290, 390, 490, 590, 690, 790

[0049] Image stabilization modules: 14

[0050] Electronics: 20, 30, 40

[0051] Flash modules: 21

[0052] Focus assist modules: 22

[0053] Image signal processor: 23

[0054] User interface: 24, 34

[0055] Image software processor: 25

[0056] Subjects: 26

[0057] Aperture: 100, 200, 300, 400, 500, 600, 700

[0058] First lens: 110, 210, 310, 410, 510, 610, 710

[0059] Object side surface: 111, 211, 311, 411, 511, 611, 711

[0060] Image side surface: 112, 212, 312, 412, 512, 612, 712

[0061] Second lens: 120, 220, 320, 420, 520, 620, 720

[0062] Object side surface: 121, 221, 321, 421, 521, 621, 721

[0063] Image side surface: 122, 222, 322, 422, 522, 622, 722

[0064] Third lens: 130, 230, 330, 430, 530, 630, 730

[0065] Object side surface: 131, 231, 331, 431, 531, 631, 731

[0066] Image side surface: 132, 232, 332, 432, 532, 632, 732

[0067] Fourth lens: 140, 240, 340, 440, 540, 640, 740

[0068] Object side surface: 141, 241, 341, 441, 541, 641, 741

[0069] Image side surface: 142, 242, 342, 442, 542, 642, 742

[0070] Fifth lens: 150, 250, 350, 450, 550, 650, 750

[0071] Object side surface: 151, 251, 351, 451, 551, 651, 751

[0072] Image side surface: 152, 252, 352, 452, 552, 652, 752

[0073] Sixth lens: 160, 260, 360, 460, 560, 660, 760

[0074] Object side surface: 161, 261, 361, 461, 561, 661, 761

[0075] Image side surface: 162, 262, 362, 462, 562, 662, 762

[0076] Infrared filter elements: 170, 270, 370, 470, 570, 670, 770

[0077] Imaging area: 180, 280, 380, 480, 580, 680, 780

[0078] Aperture: 301

[0079] f: focal length of photographic optical lens group

[0080] Fno: Aperture value of the photographic optical lens group

[0081] HFOV: Half of the maximum field of view in a photographic optical lens group

[0082] FOV: The maximum viewing angle in a photographic optical lens group

[0083] V32: The total number of lenses with an Abbe number less than 32 in the photographic optical lens group V2: The Abbe number of the second lens

[0084] V4: Abbe number of the fourth lens

[0085] V6: Abbe number of the sixth lens

[0086] N6: refractive index of the sixth lens

[0087] R1: The radius of curvature of the object side surface of the first lens

[0088] R2: The radius of curvature of the image-side surface of the first lens

[0089] R3: The radius of curvature of the object side surface of the second lens

[0090] R4: The radius of curvature of the image-side surface of the second lens

[0091] R5: The radius of curvature of the object side surface of the third lens

[0092] R6: The radius of curvature of the image-side surface of the third lens

[0093] ImgH: Maximum image height of photographic optical lens group

[0094] CT1: The thickness of the first lens on the optical axis

[0095] CT2: The thickness of the second lens on the optical axis

[0096] CT3: Thickness of the third lens on the optical axis

[0097] CT4: The thickness of the fourth lens on the optical axis

[0098] CT5: The thickness of the fifth lens on the optical axis

[0099] CT6: The thickness of the sixth lens on the optical axis

[0100] TL: The distance from the object side surface of the first lens to the imaging surface on the optical axis f1: The focal length of the first lens

[0101] f2: focal length of the second lens

[0102] f3: focal length of the third lens

[0103] f4: focal length of the fourth lens

[0104] f5: focal length of the fifth lens

[0105] f6: focal length of the sixth lens

[0106] Y11: Maximum optical effective radius of the object side surface of the first lens

[0107] Y62: Maximum optical effective radius of the image-side surface of the sixth lens

[0108] EPD: Entrance pupil diameter of photographic optical lens group DETAILED DESCRIPTION

[0109] A photographic optical lens group includes, in order from the object side to the image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, and the total number of lenses in the photographic optical lens group is six.

[0110] The first lens has a negative refractive power. The surface on the object side near the optical axis is concave, thereby reducing the optical effective radius of the first lens, which helps to reduce the overall volume of the photographic optical lens group. The surface on the object side of the first lens away from the axis may include at least one convex surface, which allows light rays with a large viewing angle to enter and helps to expand the viewing angle of the photographic optical lens group. In addition, the surface on the object side of the first lens away from the axis may include at least one convex critical point. Thereby, the off-axis critical point can control the path of the peripheral light beam and improve the aberration of the peripheral light rays.

[0111] The third lens may have a positive refractive power, the fourth lens may have a negative refractive power, the fifth lens may have a positive refractive power, and the sixth lens may have a negative refractive power. This helps to evenly distribute the refractive powers of the lenses in the photographic optical lens group, which is beneficial for image correction, especially for peripheral image correction.

[0112] In addition, the surface on the object side of the fifth lens near the optical axis is concave, and the surface on the image side of the fifth lens near the optical axis is convex. Thereby, the concave-convex crescent-shaped mirror surface can eliminate aberrations such as astigmatism.

[0113] In addition, the surface on the object side of the sixth lens near the optical axis may be convex, the surface on the image side of the sixth lens near the optical axis is concave, and at least one convex surface is included at the off-axis portion. Thereby, the system aberration can be further corrected, and the concave image side surface helps to move the principal point towards the object side, which can shorten the back focal length of the photographic optical lens group.

[0114] The radius of curvature of the surface on the object side of the first lens is R1, and the radius of curvature of the surface on the image side of the first lens is R2, which satisfy the following condition: (R1 + R2) / (R1 - R2) < 0.40. Thereby, it is beneficial to slow down the curvature at the center of the surface on the object side of the first lens, which can avoid the first lens being too convex and affecting the total length of the photographic optical lens group, and also helps to enhance manufacturability. Preferably, the following condition can be satisfied: -2.75 < (R1 + R2) / (R1 - R2) ≤ 0. More preferably, the following condition can be satisfied: -1.40 < (R1 + R2) / (R1 - R2) < -0.30.

[0115] The Abbe number of the second lens is V2, the Abbe number of the fourth lens is V4, and the Abbe number of the sixth lens is V6, which satisfy the following condition: 10 < V2 + V4 + V6 < 85. Thereby, a more appropriate balance can be obtained between chromatic aberration and astigmatism. Preferably, the following condition can be satisfied: 30 < V2 + V4 + V6 < 75.

[0116] The total number of lenses with an Abbe number less than 32 in the photographic optical lens group is V32, which satisfies the following condition: 3 ≤ V32. Thereby, the chromatic aberration and astigmatism of the system can be further balanced.

[0117] The radius of curvature of the object-side surface of the second lens is R3, and the radius of curvature of the image-side surface of the second lens is R4, which satisfies the following condition: |R3 / R4| < 2.0. Thereby, the mechanism and optical matching between the first lens and the second lens can be made more appropriate. Preferably, the following condition can be satisfied: |R3 / R4| < 1.0.

[0118] The focal length of the first lens is f1, and the focal length of the sixth lens is f6, which satisfies the following condition: 0.50 < f1 / f6 < 4.0. Thereby, the rear lens of the photographic optical lens group can have an appropriate refractive power, which helps to shorten the back focal length and strengthen the peripheral image correction, and further realizes the miniaturization of the photographic optical lens group.

[0119] 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 fourth lens is f4, the focal length of the fifth lens is f5, and the focal length of the sixth lens is f6. Thereby, with the configuration of the second lens having a weaker refractive power, the third lens, the fourth lens, the fifth lens, and the sixth lens with stronger refractive powers can further strengthen the correction of the peripheral image. Preferably, the following conditions can be satisfied: 1.0 < |f2 / f1|; 1.0 < |f2 / f3|; 1.0 < |f2 / f4|; 1.0 < |f2 / f5|; 1.0 < |f2 / f6|; and -0.60 < f1 / f2, so as to control the refractive power configuration of the object-side end lens.

[0120] The maximum optical effective radius of the object-side surface of the first lens is Y11, and the maximum optical effective radius of the image-side surface of the sixth lens is Y62, which satisfies the following condition: 0.50 < Y11 / Y62 < 1.50. Thereby, the total length of the photographic optical lens group can be shortened, and the miniaturization of the photographic optical lens group can be more easily realized. Preferably, the following condition can be satisfied: 0.65 < Y11 / Y62 < 1.30.

[0121] The absolute value of the radius of curvature of the image-side surface of the sixth lens is the smallest among the absolute values of the radii of curvature of all lens surfaces in the photographic optical lens group. Thereby, it helps to further shorten the back focal length of the photographic optical lens group and can strengthen the miniaturization feature of the photographic optical lens group of the present invention.

[0122] The radius of curvature of the object-side surface of the third lens is R5, and the radius of curvature of the image-side surface of the third lens is R6, which satisfies the following condition: 0 < (R5 + R6) / (R5 - R6) < 2.0. Thereby, it helps the third lens to correct aberrations to improve the imaging quality.

[0123] The maximum optical effective radius of the object side surface of the first lens is Y11, and the entrance pupil diameter of the photographic optical lens group is EPD, which satisfies the following condition: 2.0 < Y11 / EPD < 7.0. Thereby, it helps to achieve a more appropriate balance under the miniaturization of the photographic optical lens group and the configuration of a large aperture.

[0124] The aperture value of the photographic optical lens group is Fno, which satisfies the following condition: 1.0 < Fno < 3.0. Thereby, it can ensure sufficient light input to provide better imaging quality for applications such as night shooting. Preferably, the following condition can be satisfied: 1.20 < Fno < 2.45.

[0125] The maximum viewing angle in the photographic optical lens group is FOV, which satisfies the following condition: 120 degrees < FOV. Thereby, it can provide a more appropriate large viewing angle feature for the photographic optical lens group.

[0126] The distance from the object side surface of the first lens to the imaging surface on the optical axis is TL, and the maximum image height of the photographic optical lens group is ImgH, which satisfies the following condition: 1.0 < TL / ImgH < 2.2. Thereby, the total length of the photographic optical lens group can be shortened, and the photographic optical lens group can be further miniaturized. Preferably, the following condition can be satisfied: 1.2 < TL / ImgH < 2.0.

[0127] The thickness of the first lens on the optical axis is CT1, the thickness of the second lens on the optical axis is CT2, the thickness of the third lens on the optical axis is CT3, the thickness of the fourth lens on the optical axis is CT4, the thickness of the fifth lens on the optical axis is CT5, and the thickness of the sixth lens on the optical axis is CT6, which satisfies the following conditions: CT4 / CT1 < 1.0; CT4 / CT2 < 1.0; CT4 / CT3 < 1.0; CT4 / CT5 < 1.0; and CT4 / CT6 < 1.0. Thereby, under the configuration of the third lens and the fifth lens with strong positive refractive power, the aberration correction ability of the fourth lens can be enhanced.

[0128] The radius of curvature of the object side surface of the first lens is R1, and the maximum image height of the photographic optical lens group is ImgH, which satisfies the following condition: -3.0 < R1 / ImgH < 0. Thereby, the first lens can guide large-angle light to enter, which helps to expand the viewing angle of the photographic optical lens group. Preferably, the following condition can be satisfied: -1.5 < R1 / ImgH < 0.

[0129] The Abbe number of the sixth lens is V6, and the refractive index of the sixth lens is N6, which satisfies the following condition: 5 < V6 / N6 < 30. Thereby, a more appropriate balance can be obtained between chromatic aberration and astigmatism.

[0130] The above technical features in the photographic optical lens group of the present invention can be combined and configured to achieve the corresponding effects.

[0131] In the photographic optical lens set provided by the present invention, 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 optical lens set can be increased, and the glass lens can be made using grinding or molding techniques. If the lens material is plastic, the production cost can be effectively reduced. In addition, an aspherical surface (ASP) can be set on the mirror surface to obtain more control variables to reduce aberrations, reduce the number of lenses, and effectively reduce the total length of the photographic optical lens set of the present invention, and the aspherical surface can be made by plastic injection molding or molding glass lenses.

[0132] In the photographic optical lens set provided by the present invention, additives can be selectively added to any (or more) lens materials to change the transmittance of the lens for light of a specific wavelength band, thereby reducing stray light and color deviation. For example, the additive can have the function of filtering out light of the 600nm to 800nm ​​wavelength band in the system to reduce excess red light or infrared light; or can filter out light of the 350nm to 450nm wavelength band to reduce blue light or ultraviolet light in the system. Therefore, the additive can prevent light of a specific wavelength band from interfering with imaging. In addition, the additive can be evenly mixed in plastic and made into a lens by injection molding technology.

[0133] In the photographic optical lens set provided by the present invention, if the lens surface is an aspherical surface, it means that the entire optically effective area of ​​the lens surface or a part of it is an aspherical surface.

[0134] Furthermore, in the photographic optical lens set provided by the present invention, if the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface can be convex at the near optical axis; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface can be concave at the near optical axis. In the photographic optical lens set provided by the present invention, if the lens has positive or negative refractive power, or the focal length of the lens, it can refer to the refractive power or focal length of the lens at the near optical axis.

[0135] The imaging surface of the photographic optical lens set of the present invention can be a plane or a curved surface with any curvature, in particular, a curved surface with a concave surface facing the object side, depending on the different electronic photosensitive elements to which it corresponds. In addition, one or more imaging correction elements (field flattening elements, etc.) can be selectively arranged between the lens closest to the imaging surface in the photographic optical lens set of the present invention and the imaging surface to achieve the effect of correcting the image (image bending, 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 and Fresnel surface, etc.), can be adjusted according to the requirements of the imaging device. Generally speaking, the preferred imaging correction element configuration is to place a thin plano-concave element with a concave surface facing the object side near the imaging surface.

[0136] In addition, in the photographic optical lens set of the present invention, at least one stop can be provided as required, such as an aperture stop, a glare stop or a field stop, etc., to help reduce stray light and improve image quality.

[0137] In the photographic optical lens set of the present invention, the aperture configuration can be a front aperture or a center aperture, wherein the front aperture means that the aperture is set between the object and the first lens, and the center aperture means that the aperture is set between the first lens and the imaging surface. If the aperture is a front aperture, the exit pupil of the photographic optical lens set can be at a longer distance from the imaging surface, so that it has a telecentric effect and can increase the efficiency of the CCD or CMOS of the electronic photosensitive element in receiving images; if it is a center aperture, it helps to expand the field of view of the photographic optical lens set, so that it has the advantages of a wide-angle lens.

[0138] The present invention may appropriately set a variable aperture element, which may be a mechanical component or a light regulating element, which can control the size and shape of the aperture by electricity or electrical signals. The mechanical component may include movable parts such as a blade set and a shielding plate; the light regulating element may include a filter element, an electrochromic material, a liquid crystal layer and other shielding materials. The variable aperture element can enhance the image adjustment capability by controlling the amount of light entering the image or the exposure time. In addition, the variable aperture element may also be the aperture of the present invention, which can adjust the image quality, such as the depth of field or the exposure speed, by changing the F value.

[0139] The photographic optical lens assembly of the present invention can also be widely used in three-dimensional (3D) image capture, digital cameras, mobile products, digital tablets, smart TVs, network monitoring equipment, somatosensory game consoles, driving recorders, reversing imaging devices, wearable products, drones and other electronic devices.

[0140] The present invention provides an image capturing device, comprising the aforementioned photographic optical lens set and an electronic photosensitive element, wherein the electronic photosensitive element is disposed on an imaging surface of the photographic optical lens set. By reducing the optical effective radius of the first lens by configuring the surface shape of the first lens in the photographic optical lens set, the overall volume of the photographic optical lens set can be reduced to achieve miniaturization of the photographic optical lens set. Preferably, the image capturing device can further include a barrel member, a holder member, or a combination thereof.

[0141] The present invention provides an electronic device, comprising the aforementioned imaging device. The imaging device comprises a photographic optical lens set and an electronic photosensitive element, and the electronic photosensitive element is disposed on the imaging surface of the photographic optical lens set. Preferably, the electronic device may further comprise a control unit, a display unit, a storage unit, a random access memory (RAM) or a combination thereof.

[0142] According to the above implementation modes, specific embodiments are proposed below and described in detail with reference to the accompanying drawings.

[0143] <First Embodiment>

[0144] Please refer to Figure 1 and Figure 2 ,in Figure 1 FIG. 1 is a schematic diagram showing an imaging device according to a first embodiment of the present invention. Figure 2 From left to right are the spherical aberration, astigmatism and distortion curves of the first embodiment. Figure 1 It can be seen that the imaging device of the first embodiment includes a photographic optical lens group (not separately labeled) and an electronic photosensitive element 190. The photographic optical lens group includes a first lens 110, a second lens 120, an aperture 100, a third lens 130, a fourth lens 140, a fifth lens 150, a sixth lens 160, an infrared filter element 170 and an imaging surface 180 in order from the object side to the image side, and the electronic photosensitive element 190 is disposed on the imaging surface 180 of the photographic optical lens group, wherein the photographic optical lens group includes six lenses (110, 120, 130, 140, 150, 160), and there is no other interpolated lens between the six lenses.

[0145] The first lens 110 has negative refractive power and is made of plastic. Its object side surface 111 is concave near the optical axis, and its image side surface 112 is concave near the optical axis, and both are aspherical. In addition, the first lens object side surface 111 includes at least one convex surface and at least one convex critical point off the axis.

[0146] The second lens 120 has negative refractive power and is made of plastic. Its object-side surface 121 is convex near the optical axis, and its image-side surface 122 is concave near the optical axis. Both are aspherical surfaces.

[0147] The third lens 130 has positive refractive power and is made of plastic. Its object-side surface 131 is convex near the optical axis, and its image-side surface 132 is convex near the optical axis. Both are aspherical surfaces.

[0148] The fourth lens 140 has negative refractive power and is made of plastic. Its object-side surface 141 is convex near the optical axis, and its image-side surface 142 is concave near the optical axis. Both are aspherical surfaces.

[0149] The fifth lens element 150 has positive refractive power and is made of plastic. Its object-side surface 151 is concave near the optical axis, and its image-side surface 152 is convex near the optical axis. Both are aspherical surfaces.

[0150] The sixth lens 160 has negative refractive power and is made of plastic, its object side surface 161 is convex near the optical axis, and its image side surface 162 is concave near the optical axis, and both are aspherical. In addition, the image side surface 162 of the sixth lens includes at least one convex surface off the axis.

[0151] The infrared ray rejection filter element 170 is made of glass, is disposed between the sixth lens 160 and the imaging surface 180, and does not affect the focal length of the photographic optical lens set.

[0152] The curve equations of the aspheric surfaces of the above lenses are expressed as follows:

[0153]

[0154] in:

[0155] X: The relative distance between the point on the aspherical surface that is Y away from the optical axis and the tangent plane that is tangent to the intersection point on the optical axis of the aspherical surface;

[0156] Y: the vertical distance between the point on the aspheric curve and the optical axis;

[0157] R: radius of curvature;

[0158] k: cone coefficient; and

[0159] Ai: i-th order aspheric coefficient.

[0160] In the photographic optical lens group of the first embodiment, the focal length of the photographic optical lens group is f, the aperture value (f-number) of the photographic optical lens group is Fno, and half of the maximum viewing angle in the photographic optical lens group is HFOV, and its values ​​are as follows: f=1.84mm; Fno=2.65; and HFOV=70.0 degrees.

[0161] In the photographic optical lens set of the first embodiment, the maximum viewing angle in the photographic optical lens set is FOV, which satisfies the following condition: FOV=140.0 degrees.

[0162] In the photographic optical lens set of the first embodiment, the total number of lenses with an Abbe number less than 32 in the photographic optical lens set is V32, which satisfies the following condition: V32=3.

[0163] In the photographic optical lens set of the first embodiment, the Abbe number of the second lens 120 is V2, the Abbe number of the fourth lens 140 is V4, the Abbe number of the sixth lens 160 is V6, and the refractive index number of the sixth lens 160 is N6, which satisfies the following conditions: V2+V4+V6=61.3; and V6 / N6=14.34.

[0164] In the photographic optical lens set of the first embodiment, the curvature radius of the first lens object side surface 111 is R1, and the curvature radius of the first lens image side surface 112 is R2, which satisfies the following condition: (R1+R2) / (R1-R2)=-0.34.

[0165] In the photographic optical lens set of the first embodiment, the curvature radius of the second lens object-side surface 121 is R3, and the curvature radius of the second lens image-side surface 122 is R4, which satisfies the following condition: |R3 / R4|=1.15.

[0166] In the photographic optical lens set of the first embodiment, the curvature radius of the object-side surface 131 of the third lens is R5, and the curvature radius of the image-side surface 132 of the third lens is R6, which satisfies the following condition: (R5+R6) / (R5-R6)=0.50.

[0167] In the photographic optical lens set of the first embodiment, the radius of curvature of the object-side surface 111 of the first lens is R1, and the maximum image height of the photographic optical lens set is ImgH, which satisfies the following condition: R1 / ImgH=-1.21.

[0168] In the photographic optical lens set of the first embodiment, the thickness of the first lens 110 on the optical axis is CT1, the thickness of the second lens 120 on the optical axis is CT2, the thickness of the third lens 130 on the optical axis is CT3, the thickness of the fourth lens 140 on the optical axis is CT4, the thickness of the fifth lens 150 on the optical axis is CT5, and the thickness of the sixth lens 160 on the optical axis is CT6, which satisfies the following conditions: CT4 / CT1=0.23; CT4 / CT2=0.50; CT4 / CT3=0.36; CT4 / CT5=0.31; and CT4 / CT6=0.75.

[0169] In the photographic optical lens set of the first embodiment, the distance between the first lens object side surface 111 and the imaging surface 180 on the optical axis is TL, and the maximum image height of the photographic optical lens set is ImgH, which satisfies the following condition: TL / ImgH=1.98.

[0170] In the photographic optical lens group of the first embodiment, the focal length of the first lens 110 is f1, the focal length of the second lens 120 is f2, the focal length of the third lens 130 is f3, the focal length of the fourth lens 140 is f4, the focal length of the fifth lens 150 is f5, and the focal length of the sixth lens 160 is f6, which satisfies the following conditions: f1 / f2=0.07; f1 / f6=2.04; |f2 / f1|=14.36; |f2 / f3|=38.70; |f2 / f4|=9.38; |f2 / f5|=32.63; and |f2 / f6|=29.35.

[0171] Mate Reference Fig.15A and Fig. 15B ,in Fig.15A Draw according to Figure 1 A schematic diagram of the parameter Y11 in the photographic optical lens set of the first embodiment, Fig. 15B Draw according to Figure 1 Schematic diagram of parameter Y62 in the photographic optical lens set of the first embodiment. Fig.15A and Fig. 15B It can be seen that in the photographic optical lens group of the first embodiment, the maximum optical effective radius of the object side surface 111 of the first lens is Y11, the maximum optical effective radius of the image side surface 162 of the sixth lens is Y62, and the entrance pupil diameter of the photographic optical lens group is EPD, which satisfies the following conditions: Y11 / Y62=0.99; and Y11 / EPD=3.49.

[0172] Please refer to Table 1 and Table 2 below.

[0173]

[0174]

[0175]

[0176]

[0177] Table 1 Figure 1 The first embodiment has detailed structural data, where the units of the radius of curvature, thickness and focal length are in mm, and surfaces 0-16 represent the surfaces from the object side to the image side in sequence. Table 2 is the aspheric surface data in the first embodiment, where k represents the cone coefficient in the aspheric curve equation, and A4-A16 represents the 4th-16th order aspheric surface coefficients of each surface. In addition, the following tables of the embodiments correspond to the schematic diagrams and aberration curves of the embodiments, and the definitions of the data in the tables are the same as those in Tables 1 and 2 of the first embodiment, and are not repeated here.

[0178] <Second Embodiment>

[0179] Please refer to Figure 3 and Figure 4 ,in Figure 3 FIG. 1 is a schematic diagram showing an imaging device according to a second embodiment of the present invention. Figure 4 From left to right are the spherical aberration, astigmatism and distortion curves of the second embodiment. Figure 3 It can be seen that the imaging device of the second embodiment includes a photographic optical lens group (not separately labeled) and an electronic photosensitive element 290. The photographic optical lens group includes a first lens 210, a second lens 220, an aperture 200, a third lens 230, a fourth lens 240, a fifth lens 250, a sixth lens 260, an infrared filter element 270 and an imaging surface 280 in order from the object side to the image side, and the electronic photosensitive element 290 is disposed on the imaging surface 280 of the photographic optical lens group, wherein the photographic optical lens group includes six lenses (210, 220, 230, 240, 250, 260), and there is no other interpolated lens between the six lenses.

[0180] The first lens 210 has negative refractive power and is made of plastic. Its object side surface 211 is concave near the optical axis, and its image side surface 212 is convex near the optical axis, and both are aspherical. In addition, the first lens object side surface 211 includes at least one convex surface and at least one convex critical point off the axis.

[0181] The second lens 220 has positive refractive power and is made of plastic. Its object-side surface 221 is convex near the optical axis, and its image-side surface 222 is concave near the optical axis. Both are aspherical surfaces.

[0182] The third lens 230 has positive refractive power and is made of plastic. Its object-side surface 231 is convex near the optical axis, and its image-side surface 232 is convex near the optical axis. Both are aspherical surfaces.

[0183] The fourth lens element 240 has negative refractive power and is made of plastic. Its object-side surface 241 is convex near the optical axis, and its image-side surface 242 is concave near the optical axis. Both are aspherical surfaces.

[0184] The fifth lens element 250 has positive refractive power and is made of plastic. Its object-side surface 251 is concave near the optical axis, and its image-side surface 252 is convex near the optical axis. Both are aspherical surfaces.

[0185] The sixth lens 260 has negative refractive power and is made of plastic, its object side surface 261 is convex near the optical axis, and its image side surface 262 is concave near the optical axis, and both are aspherical. In addition, the image side surface 262 of the sixth lens includes at least one convex surface off the axis.

[0186] The infrared filter element 270 is made of glass, is disposed between the sixth lens 260 and the imaging surface 280, and does not affect the focal length of the photographic optical lens set.

[0187] Please refer to Table 3 and Table 4 below.

[0188]

[0189]

[0190]

[0191] In the second embodiment, the curve equation of the aspheric surface is expressed in the same form as in the first embodiment. In addition, the definitions of the parameters in the following table are the same as those in the first embodiment and are not repeated here.

[0192] The following data can be calculated by combining Table 3 and Table 4:

[0193]

[0194] <Third Embodiment>

[0195] Please refer to Figure 5 and Figure 6 ,in Figure 5 FIG. 1 is a schematic diagram showing an imaging device according to a third embodiment of the present invention. Figure 6 From left to right are the spherical aberration, astigmatism and distortion curves of the third embodiment. Figure 5 It can be seen that the imaging device of the third embodiment includes a photographic optical lens group (not separately labeled) and an electronic photosensitive element 390. The photographic optical lens group includes a first lens 310, a second lens 320, an aperture 300, a third lens 330, a stop 301, a fourth lens 340, a fifth lens 350, a sixth lens 360, an infrared filter element 370 and an imaging surface 380 in order from the object side to the image side, and the electronic photosensitive element 390 is disposed on the imaging surface 380 of the photographic optical lens group, wherein the photographic optical lens group includes six lenses (310, 320, 330, 340, 350, 360), and there is no other interpolated lens between the six lenses.

[0196] The first lens 310 has negative refractive power and is made of plastic. Its object side surface 311 is concave near the optical axis, and its image side surface 312 is concave near the optical axis, and both are aspherical. In addition, the object side surface 311 of the first lens includes at least one convex surface and at least one convex critical point off the axis.

[0197] The second lens 320 has positive refractive power and is made of plastic. Its object-side surface 321 is convex near the optical axis, and its image-side surface 322 is concave near the optical axis. Both are aspherical surfaces.

[0198] The third lens 330 has positive refractive power and is made of plastic. Its object-side surface 331 is convex near the optical axis, and its image-side surface 332 is convex near the optical axis. Both are aspherical surfaces.

[0199] The fourth lens element 340 has negative refractive power and is made of plastic. Its object-side surface 341 is concave near the optical axis, and its image-side surface 342 is concave near the optical axis. Both are aspherical surfaces.

[0200] The fifth lens element 350 has positive refractive power and is made of plastic. Its object-side surface 351 is concave near the optical axis, and its image-side surface 352 is convex near the optical axis. Both are aspherical surfaces.

[0201] The sixth lens 360 has negative refractive power and is made of plastic, its object side surface 361 is convex near the optical axis, and its image side surface 362 is concave near the optical axis, and both are aspherical. In addition, the image side surface 362 of the sixth lens includes at least one convex surface off the axis.

[0202] The infrared filter element 370 is made of glass, is disposed between the sixth lens 360 and the imaging surface 380, and does not affect the focal length of the photographic optical lens set.

[0203] Please refer to Table 5 and Table 6 below.

[0204]

[0205]

[0206]

[0207] In the third embodiment, the curve equation of the aspheric surface is expressed in the same form as in the first embodiment. In addition, the definitions of the parameters in the following table are the same as those in the first embodiment and are not repeated here.

[0208] The following data can be calculated by combining Table 5 and Table 6:

[0209]

[0210]

[0211] <Fourth Embodiment>

[0212] Please refer to Figure 7 and Figure 8 ,in Figure 7 FIG. 4 is a schematic diagram showing an imaging device according to a fourth embodiment of the present invention. Figure 8 From left to right are the spherical aberration, astigmatism and distortion curves of the fourth embodiment. Figure 7It can be seen that the imaging device of the fourth embodiment includes a photographic optical lens group (not separately labeled) and an electronic photosensitive element 490. The photographic optical lens group includes a first lens 410, a second lens 420, an aperture 400, a third lens 430, a fourth lens 440, a fifth lens 450, a sixth lens 460, an infrared filter element 470 and an imaging surface 480 in order from the object side to the image side, and the electronic photosensitive element 490 is disposed on the imaging surface 480 of the photographic optical lens group, wherein the photographic optical lens group includes six lenses (410, 420, 430, 440, 450, 460), and there is no other interpolated lens between the six lenses.

[0213] The first lens 410 has negative refractive power and is made of plastic. Its object side surface 411 is concave near the optical axis, and its image side surface 412 is concave near the optical axis, and both are aspherical. In addition, the first lens object side surface 411 includes at least one convex surface and at least one convex critical point off the axis.

[0214] The second lens 420 has positive refractive power and is made of plastic. Its object-side surface 421 is convex near the optical axis, and its image-side surface 422 is concave near the optical axis. Both are aspherical surfaces.

[0215] The third lens 430 has positive refractive power and is made of plastic. Its object-side surface 431 is convex near the optical axis, and its image-side surface 432 is convex near the optical axis. Both are aspherical surfaces.

[0216] The fourth lens element 440 has negative refractive power and is made of plastic. Its object-side surface 441 is convex near the optical axis, and its image-side surface 442 is concave near the optical axis. Both are aspherical surfaces.

[0217] The fifth lens element 450 has positive refractive power and is made of plastic. Its object-side surface 451 is concave near the optical axis, and its image-side surface 452 is convex near the optical axis. Both are aspherical surfaces.

[0218] The sixth lens 460 has negative refractive power and is made of plastic, its object side surface 461 is convex near the optical axis, and its image side surface 462 is concave near the optical axis, and both are aspherical. In addition, the image side surface 462 of the sixth lens includes at least one convex surface off the axis.

[0219] The infrared filter element 470 is made of glass, is disposed between the sixth lens 460 and the imaging surface 480, and does not affect the focal length of the photographic optical lens set.

[0220] Please refer to Table 7 and Table 8 below.

[0221]

[0222]

[0223]

[0224] In the fourth embodiment, the curve equation of the aspheric surface is expressed in the same form as in the first embodiment. In addition, the definitions of the parameters in the following table are the same as those in the first embodiment and are not repeated here.

[0225] The following data can be calculated by combining Table 7 and Table 8:

[0226]

[0227] <Fifth Embodiment>

[0228] Please refer to Fig. 9 and Fig.10 ,in Fig. 9 FIG. 4 is a schematic diagram showing an imaging device according to a fifth embodiment of the present invention. Fig.10 From left to right are the spherical aberration, astigmatism and distortion curves of the fifth embodiment. Fig. 9 It can be seen that the imaging device of the fifth embodiment includes a photographic optical lens group (not separately labeled) and an electronic photosensitive element 590. The photographic optical lens group includes a first lens 510, a second lens 520, an aperture 500, a third lens 530, a fourth lens 540, a fifth lens 550, a sixth lens 560, an infrared filter element 570 and an imaging surface 580 in order from the object side to the image side, and the electronic photosensitive element 590 is disposed on the imaging surface 580 of the photographic optical lens group, wherein the photographic optical lens group includes six lenses (510, 520, 530, 540, 550, 560), and there is no other interpolated lens between the six lenses.

[0229] The first lens 510 has negative refractive power and is made of plastic. Its object side surface 511 is concave near the optical axis, and its image side surface 512 is concave near the optical axis, and both are aspherical. In addition, the object side surface 511 of the first lens includes at least one convex surface and at least one convex critical point off the axis.

[0230] The second lens 520 has positive refractive power and is made of plastic. Its object-side surface 521 is convex near the optical axis, and its image-side surface 522 is concave near the optical axis. Both are aspherical surfaces.

[0231] The third lens 530 has positive refractive power and is made of plastic. Its object-side surface 531 is convex near the optical axis, and its image-side surface 532 is convex near the optical axis. Both are aspherical surfaces.

[0232] The fourth lens element 540 has negative refractive power and is made of plastic. Its object-side surface 541 is convex near the optical axis, and its image-side surface 542 is concave near the optical axis. Both are aspherical surfaces.

[0233] The fifth lens element 550 has positive refractive power and is made of plastic. Its object-side surface 551 is concave near the optical axis, and its image-side surface 552 is convex near the optical axis. Both are aspherical surfaces.

[0234] The sixth lens 560 has negative refractive power and is made of plastic, its object side surface 561 is convex near the optical axis, and its image side surface 562 is concave near the optical axis, and both are aspherical. In addition, the image side surface 562 of the sixth lens includes at least one convex surface off the axis.

[0235] The infrared filter element 570 is made of glass, is disposed between the sixth lens 560 and the imaging surface 580, and does not affect the focal length of the photographic optical lens set.

[0236] Please refer to Table 9 and Table 10 below.

[0237]

[0238]

[0239]

[0240] In the fifth embodiment, the curve equation of the aspheric surface is expressed in the same form as in the first embodiment. In addition, the definitions of the parameters in the following table are the same as those in the first embodiment and are not repeated here.

[0241] The following data can be calculated by combining Table 9 and Table 10:

[0242]

[0243] <Sixth Embodiment>

[0244] Please refer to Fig.11 and Fig.12 ,in Fig.11 FIG. 1 is a schematic diagram showing an imaging device according to a sixth embodiment of the present invention. Fig.12 From left to right are the spherical aberration, astigmatism and distortion curves of the sixth embodiment. Fig.11 It can be seen that the imaging device of the sixth embodiment includes a photographic optical lens group (not separately labeled) and an electronic photosensitive element 690. The photographic optical lens group includes a first lens 610, a second lens 620, an aperture 600, a third lens 630, a fourth lens 640, a fifth lens 650, a sixth lens 660, an infrared filter element 670 and an imaging surface 680 in order from the object side to the image side, and the electronic photosensitive element 690 is disposed on the imaging surface 680 of the photographic optical lens group, wherein the photographic optical lens group includes six lenses (610, 620, 630, 640, 650, 660), and there is no other interpolated lens between the six lenses.

[0245] The first lens 610 has negative refractive power and is made of plastic. Its object side surface 611 is concave near the optical axis, and its image side surface 612 is concave near the optical axis, and both are aspherical. In addition, the first lens object side surface 611 includes at least one convex surface and at least one convex critical point off the axis.

[0246] The second lens 620 has positive refractive power and is made of plastic. Its object-side surface 621 is convex near the optical axis, and its image-side surface 622 is concave near the optical axis. Both are aspherical surfaces.

[0247] The third lens 630 has positive refractive power and is made of plastic. Its object-side surface 631 is convex near the optical axis, and its image-side surface 632 is convex near the optical axis. Both are aspherical surfaces.

[0248] The fourth lens element 640 has negative refractive power and is made of plastic. Its object-side surface 641 is convex near the optical axis, and its image-side surface 642 is concave near the optical axis. Both are aspherical surfaces.

[0249] The fifth lens element 650 has positive refractive power and is made of plastic. Its object-side surface 651 is concave near the optical axis, and its image-side surface 652 is convex near the optical axis. Both are aspherical surfaces.

[0250] The sixth lens 660 has negative refractive power and is made of plastic, its object side surface 661 is convex near the optical axis, and its image side surface 662 is concave near the optical axis, and both are aspherical. In addition, the image side surface 662 of the sixth lens includes at least one convex surface off the axis.

[0251] The infrared filter element 670 is made of glass, is disposed between the sixth lens 660 and the imaging surface 680, and does not affect the focal length of the photographic optical lens set.

[0252] Please refer to Table 11 and Table 12 below.

[0253]

[0254]

[0255]

[0256] In the sixth embodiment, the curve equation of the aspheric surface is expressed in the same form as in the first embodiment. In addition, the definitions of the parameters in the following table are the same as those in the first embodiment and are not repeated here.

[0257] The following data can be calculated by combining Table 11 and Table 12:

[0258]

[0259]

[0260] <Seventh Embodiment>

[0261] Please refer to Fig.13 and Fig.14 ,in Fig.13 FIG. 1 is a schematic diagram showing an imaging device according to a seventh embodiment of the present invention. Fig.14 From left to right are the spherical aberration, astigmatism and distortion curves of the seventh embodiment. Fig.13 It can be seen that the imaging device of the seventh embodiment includes a photographic optical lens group (not separately labeled) and an electronic photosensitive element 790. The photographic optical lens group includes a first lens 710, a second lens 720, an aperture 700, a third lens 730, a fourth lens 740, a fifth lens 750, a sixth lens 760, an infrared filter element 770 and an imaging surface 780 in order from the object side to the image side, and the electronic photosensitive element 790 is disposed on the imaging surface 780 of the photographic optical lens group, wherein the photographic optical lens group includes six lenses (710, 720, 730, 740, 750, 760), and there is no other interpolated lens between the six lenses.

[0262] The first lens 710 has negative refractive power and is made of plastic. Its object side surface 711 is concave near the optical axis, and its image side surface 712 is concave near the optical axis, and both are aspherical. In addition, the first lens object side surface 711 includes at least one convex surface and at least one convex critical point off the axis.

[0263] The second lens 720 has positive refractive power and is made of plastic. Its object-side surface 721 is convex near the optical axis, and its image-side surface 722 is convex near the optical axis. Both are aspherical surfaces.

[0264] The third lens 730 has positive refractive power and is made of plastic. Its object-side surface 731 is concave near the optical axis, and its image-side surface 732 is convex near the optical axis. Both are aspherical surfaces.

[0265] The fourth lens element 740 has negative refractive power and is made of plastic. Its object-side surface 741 is convex near the optical axis, and its image-side surface 742 is concave near the optical axis. Both are aspherical surfaces.

[0266] The fifth lens element 750 has positive refractive power and is made of plastic. Its object-side surface 751 is concave near the optical axis, and its image-side surface 752 is convex near the optical axis. Both are aspherical surfaces.

[0267] The sixth lens 760 has negative refractive power and is made of plastic, its object side surface 761 is convex near the optical axis, and its image side surface 762 is concave near the optical axis, and both are aspherical. In addition, the image side surface 762 of the sixth lens includes at least one convex surface off the axis.

[0268] The infrared filter element 770 is made of glass, is disposed between the sixth lens 760 and the imaging surface 780, and does not affect the focal length of the photographic optical lens set.

[0269] Please refer to Table 13 and Table 14 below.

[0270]

[0271]

[0272]

[0273] In the seventh embodiment, the curve equation of the aspheric surface is expressed in the same form as in the first embodiment. In addition, the definitions of the parameters in the following table are the same as those in the first embodiment and are not repeated here.

[0274] The following data can be calculated by combining Table 13 and Table 14:

[0275]

[0276] <Eighth Embodiment>

[0277] Please refer to Fig.16 , which is a three-dimensional schematic diagram of an image capturing device 10 according to an eighth embodiment of the present invention. Fig.16 It can be seen that the image capturing device 10 of the eighth embodiment is a camera module, and the image capturing device 10 includes an imaging lens 11, a driving device group 12, and an electronic photosensitive element 13, wherein the imaging lens 11 includes the photographic optical lens group of the first embodiment of the present invention and a lens barrel (not separately labeled) that carries the photographic optical lens group. The image capturing device 10 uses the imaging lens 11 to focus light and take pictures of the subject, and cooperates with the driving device group 12 to focus the image, and finally forms an image on the electronic photosensitive element 13, and outputs the image data.

[0278] The driving device group 12 can be an auto-focus module, and its driving method can use a driving system such as a voice coil motor (VCM), a micro electro-mechanical system (MEMS), a piezoelectric system (Piezoelectric), and a shape memory alloy. The driving device group 12 can allow the photographic optical lens group to obtain a better imaging position, and can provide a clear image of the subject at different object distances.

[0279] The image capturing device 10 may be equipped with an electronic photosensitive element 13 (such as CMOS, CCD) with good sensitivity and low noise, which is disposed on the imaging surface of the photographic optical lens set, and can truly present the good imaging quality of the photographic optical lens set.

[0280] In addition, the image capturing device 10 may further include an image stabilization module 14, which may be a kinetic energy sensing element such as an accelerometer, a gyroscope or a Hall Effect Sensor. In the eighth embodiment, the image stabilization module 14 is a gyroscope, but is not limited thereto. By adjusting the changes in different axial directions of the photographic optical lens group to compensate for the blurred image caused by shaking at the moment of shooting, the image quality of dynamic and low-light scene shooting is further improved, and advanced image compensation functions such as optical image stabilization (OIS) and electronic image stabilization (EIS) are provided.

[0281] <Ninth Embodiment>

[0282] Please refer to Fig.17A , Fig. 17B and Fig. 17C ,in Fig.17A FIG. 1 is a schematic diagram showing a side of an electronic device 20 according to a ninth embodiment of the present invention. Fig. 17B Draw according to Fig.17A A schematic diagram of the other side of the electronic device 20, Fig. 17C Draw according to Fig.17A A schematic diagram of the system of the electronic device 20. Fig.17A , Fig. 17B and Fig. 17C It can be seen that the electronic device 20 of the ninth embodiment is a smart phone, and the electronic device 20 includes an image capturing device 10a, a flash module 21, a focus assist module 22, an image signal processor 23 (Image Signal Processor; ISP), a user interface 24, and an image software processor 25. When the user shoots the subject 26 through the user interface 24, the electronic device 20 uses the image capturing device 10a to focus and capture the image, activates the flash module 21 for fill light, and uses the subject distance information provided by the focus assist module 22 for fast focusing, and the image signal processor 23 and the image software processor 25 perform image optimization processing to further improve the image quality produced by the photographic optical lens set. The focus assist module 22 can use an infrared or laser focus assist system to achieve fast focusing, and the user interface 24 can use a touch screen or a physical shooting button, and cooperate with the diverse functions of the image processing software to perform image shooting and image processing.

[0283] In the ninth embodiment, the imaging device 10a may be the same as the imaging device 10 in the eighth embodiment ( Fig. 17C In the imaging device 10a, each component and Fig.16The corresponding components are marked with the same reference numerals), or the imaging device 10a may also include a lens group, which may be the same as or different from the photographic optical lens group of the present invention, and will not be described in detail here. In addition, the imaging device 10a may include an electronic photosensitive element, and the imaging surface of the lens group or the photographic optical lens group disposed therein is configured the same as the electronic photosensitive element 13 of the imaging device 10 in the eighth embodiment, so the electronic photosensitive elements in the ninth embodiment are all marked corresponding to the electronic photosensitive element 13 of the eighth embodiment.

[0284] <Tenth Embodiment>

[0285] Please refer to Fig.18A and Fig.18B ,in Fig.18A FIG. 1 is a schematic diagram showing a side of an electronic device 30 according to a tenth embodiment of the present invention. Fig.18B Draw according to Fig.18A Schematic diagram of the other side of the electronic device 30. Fig.18A and Fig.18B It can be seen that the electronic device 30 of the tenth embodiment is a tablet computer, and the electronic device 30 includes five imaging devices 10b, 10c, 10d, 10e, 10f, a user interface 34, and an image software processor (not shown in the figure), wherein the imaging devices 10b and 10c are front imaging devices, and the imaging devices 10d, 10e, and 10f are rear imaging devices. Similar to the ninth embodiment, when the user takes a photo of the object (not shown in the figure) through the user interface 34, the electronic device 30 uses the imaging devices 10b, 10c, 10d, 10e, and 10f to focus and take images, and the image software processor performs image optimization processing to further improve the image quality produced by the photographic optical lens set. The user interface 34 can use a touch screen or a physical shooting button, and cooperate with the diverse functions of the image processing software to perform image shooting and image processing.

[0286] The five imaging devices 10b, 10c, 10d, 10e, and 10f in the tenth embodiment can all be the same as the imaging device 10 in the eighth embodiment, and will not be described in detail. Specifically, the imaging devices 10b and 10c in the tenth embodiment can be wide-angle imaging devices and ultra-wide-angle imaging devices, respectively, and the imaging devices 10d, 10e, and 10f can be ultra-wide-angle imaging devices, wide-angle imaging devices, and telephoto imaging devices, respectively, or can be other types of imaging devices, and are not limited to this configuration.

[0287] <Eleventh Embodiment>

[0288] Please refer to Fig.19, is a schematic diagram illustrating an electronic device 40 according to the eleventh embodiment of the present invention. The electronic device 40 of the eleventh embodiment is a wearable device, and the electronic device 40 includes an imaging device 41, wherein the imaging device 41 may be the same as the eighth embodiment, and will not be described in detail herein.

[0289] Although the present invention has been disclosed as above in the form of an implementation method, it is not intended to limit the present invention. Anyone familiar with this technology can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined by the attached claims.

Claims

1. A photographic optical lens set, characterized in that: The six lenses are as follows from the object side to the image side: A first lens having negative refractive power, wherein the object side surface of the first lens is concave near the optical axis, and the object side surface of the first lens includes at least one convex critical point off the axis; a second lens having an object-side surface that is convex near the optical axis; a third lens having positive refractive power; a fourth lens element having negative refractive power; a fifth lens element having positive refractive power and an image-side surface thereof being convex near the optical axis; and a sixth lens element having negative refractive power, wherein the image side surface of the sixth lens element is concave near the optical axis and the image side surface of the sixth lens element includes at least one convex surface off the axis; The total number of lenses of the photographic optical lens set is six. The photographic optical lens set further includes an aperture, which is placed between the second lens and the third lens. The Abbe number of the second lens is V2, the Abbe number of the fourth lens is V4, the Abbe number of the sixth lens is V6, the refractive index of the sixth lens is N6, the aperture value of the photographic optical lens set is Fno, the maximum optical effective radius of the object side surface of the first lens is Y11, the maximum optical effective radius of the image side surface of the sixth lens is Y62, the curvature radius of the object side surface of the first lens is R1, the maximum image height of the photographic optical lens set is ImgH, the curvature radius of the object side surface of the second lens is R3, the curvature radius of the image side surface of the second lens is R4, and the distance from the object side surface of the first lens to an imaging plane on the optical axis is TL, which satisfies the following conditions: 30 <V2+V4+V6<85; 5 <V6 / N6≤14.34; 1.0 <Fno≤2.65; 0.50 <Y11 / Y62≤1.12; -3.0 <R1 / ImgH<0; |R3 / R4|≤1.15; and 1.0 <TL / ImgH<2.2。 2. The photographic optical lens set according to claim 1, characterized in that: The second lens has positive refractive power, the image side surface of the second lens is concave near the optical axis, and the object side surface of the sixth lens is convex near the optical axis.

3. The photographic optical lens set according to claim 1, characterized in that: The Abbe number of the second lens is V2, the Abbe number of the fourth lens is V4, and the Abbe number of the sixth lens is V6, which satisfies the following conditions: 30 <V2+V4+V6<75。 4. The photographic optical lens set according to claim 1, characterized in that: The curvature radius of the object side surface of the second lens is R3, and the curvature radius of the image side surface of the second lens is R4, which meets the following conditions: |R3 / R4|<1.

0.

5. The photographic optical lens set according to claim 1, characterized in that: The Abbe number of the second lens is V2, the Abbe number of the fourth lens is V4, the Abbe number of the sixth lens is V6, the refractive index of the sixth lens is N6, the aperture value of the photographic optical lens group is Fno, the maximum optical effective radius of the object side surface of the first lens is Y11, and the maximum optical effective radius of the image side surface of the sixth lens is Y62, which meets the following conditions: 59.2≤V2+V4+V6≤70.5; 10.23≤V6 / N6≤14.34; 2.10 ≤ Fno ≤ 2.65; and 0.65 <Y11 / Y62≤1.12。 6. The photographic optical lens set according to claim 1, characterized in that: The absolute value of the curvature radius of the image-side surface of the sixth lens is the smallest among the absolute values ​​of the curvature radius of all lens surfaces in the photographic optical lens group.

7. The photographic optical lens set according to claim 1, characterized in that: The maximum optically effective radius of the object-side surface of the first lens is Y11, and the entrance pupil diameter of the photographic optical lens group is EPD, which satisfies the following conditions: 2.0 < Y11 / EPD < 7.

0.

8. The photographic optical lens set according to claim 1, characterized in that: The thickness of the first lens on the optical axis is CT1, and the thickness of the fourth lens on the optical axis is CT4, which satisfies the following conditions: 0.23 ≤ CT4 / CT1 ≤ 0.

89.

9. The photographic optical lens set according to claim 1, characterized in that: The maximum optically effective radius of the object-side surface of the first lens is Y11, and the maximum optically effective radius of the image-side surface of the sixth lens is Y62, which satisfies the following conditions: 0.65 < Y11 / Y62 ≤ 0.

99.

10. The photographic optical lens set according to claim 9, characterized in that: The radius of curvature of the object-side surface of the first lens is R1, and the maximum image height of the photographic optical lens group is ImgH, which satisfies the following conditions: -1.5 < R1 / ImgH < 0.

11. The photographic optical lens set according to claim 1, characterized in that: The radius of curvature of the object-side surface of the third lens is R5, the radius of curvature of the image-side surface of the third lens is R6, the f-number of the photographic optical lens group is Fno, the distance on the optical axis from the object-side surface of the first lens to the imaging surface is TL, and the maximum image height of the photographic optical lens group is ImgH, which satisfies the following conditions: 0 < (R5 + R6) / (R5 - R6) < 2.0; 1.20 < Fno < 2.45; and 1.81 ≤ TL / ImgH ≤ 2.

02.

12. The photographic optical lens set according to claim 1, characterized in that: The maximum optically effective radius of the object-side surface of the first lens is Y11, and the maximum optically effective radius of the image-side surface of the sixth lens is Y62, which satisfies the following conditions: 0.50 < Y11 / Y62 ≤ 0.

86.

13. The photographic optical lens set according to claim 1, characterized in that: The near-optical-axis part of the object-side surface of the fourth lens is convex, and the near-optical-axis part of the image-side surface of the fourth lens is concave.

14. The photographic optical lens set 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, and the focal length of the sixth lens is f6, which satisfies the following conditions: -0.60 < f1 / f2; and 0.50 < f1 / f6 < 4.

0.

15. The photographic optical lens set according to claim 1, characterized in that: The maximum optically effective radius of the object-side surface of the first lens is Y11, the entrance pupil diameter of the photographic optical lens group is EPD, 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 third lens is R5, the radius of curvature of the image-side surface of the third lens is R6, and the maximum image height of the photographic optical lens group is ImgH, which satisfies the following conditions: 2.75 ≤ Y11 / EPD ≤ 4.06; -1.21 ≤ R1 / ImgH ≤ -0.85; and 0 < (R5 + R6) / (R5 - R6) ≤ 1.

02.

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

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