Camera optical lens set

Abstract

The present invention provides a camera optical lens group, which includes seven lenses, which are a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens in order from the object side to the image side. The third lens has positive refractive power and its image side surface is convex at the near optical axis, the image side surface of the fourth lens is concave at the near optical axis, the sixth lens has positive refractive power, the image side surface of the seventh lens is concave at the near optical axis and has at least one critical point at the off-axis position, and the object side surface and the image side surface of the seventh lens are both aspherical surfaces. The present invention can easily realize the miniaturization of the camera module, improve the peripheral relative illumination, and effectively improve the manufacturability and maintain the imaging quality.

Description

[0001] This application is a further divisional application of a divisional application. The application date of the original application is March 4, 2019, and the application number of the original application is: 201910159295.X (the application number of the divisional application is: 202111367195.X; the filing date of the divisional application is: November 18, 2021), and the invention name of the original application is “Camera optical lens group, imaging device and electronic device” (the invention name of the divisional application is “Camera optical lens group”). Technical Field

[0002] The invention relates to a camera optical lens group, and in particular to a camera optical lens group applicable to electronic devices. Background Art

[0003] As semiconductor process technology becomes more advanced, the performance of electronic photosensitive elements has been improved, and pixels can reach smaller sizes. Therefore, optical lenses with high imaging quality have become an indispensable part.

[0004] As technology advances with each passing day, the application scope of electronic devices equipped with optical lenses has become wider, and the requirements for optical lenses have also become more diverse. Since it is difficult for optical lenses in the past to strike a balance between requirements such as imaging quality, sensitivity, aperture size, volume or viewing angle, the present invention provides an optical lens to meet the requirements. Summary of the invention

[0005] The present invention provides a camera optical lens group, wherein the camera optical lens group comprises seven lenses. When certain conditions are met, the camera optical lens group provided by the present invention can simultaneously meet the requirements of miniaturization and wide viewing angle.

[0006] The present invention provides a camera optical lens set, wherein the total number of lenses of the camera optical lens set is seven lenses, and the seven lenses are, from the object side to the image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens in order; wherein the third lens has positive refractive power, and the image side surface of the third lens is a convex surface at the near optical axis; the image side surface of the fourth lens is a concave surface at the near optical axis; the sixth lens has positive refractive power; the image side surface of the seventh lens is a concave surface at the near optical axis and has at least one critical point at an off-axis position; the object side of the seventh lens is a convex surface; the image side surface of the fourth lens is a concave surface at the near optical axis; the sixth lens has positive refractive power; the image side surface of the seventh lens is a concave surface at the near optical axis and has at least one critical point at an off-axis position; the The side surface and the image side surface are both aspherical surfaces; wherein the Abbe number of the fourth lens is V4, the Abbe number of the fifth lens is V5, the sum of the thicknesses of the lenses of the camera optical lens group on the optical axis is ΣCT, the sum of the spacing distances between all two adjacent lenses in the camera optical lens group on the optical axis is ΣAT, 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 focal length of the camera optical lens group is f, the focal length of the first lens is f1, and the focal length of the second lens is f2, satisfying the following relationship:

[0007] 20 <V4+V5<75;

[0008] 2.75<ΣCT / ΣAT;

[0009] 0.10<(R5+R6) / (R5-R6); and

[0010] |f / f1|+|f / f2|<0.60.

[0011] The present invention further provides a camera optical lens set, wherein the total number of lenses of the camera optical lens set is seven lenses, and the seven lenses are, from the object side to the image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens in order; wherein the third lens has positive refractive power, and the image side surface of the third lens is a convex surface at the near optical axis; the object side surface of the fourth lens is a convex surface at the near optical axis, and the image side surface of the fourth lens is a concave surface at the near optical axis; the sixth lens has positive refractive power; the image side surface of the seventh lens is The seventh lens is concave near the optical axis and has at least one critical point off the axis. The object side surface and the image side surface of the seventh lens are both aspherical surfaces. The Abbe number of the fourth lens is V4, the Abbe number of the fifth lens is V5, the sum of the thicknesses of the lenses on the optical axis of the camera optical lens set is ΣCT, the sum of the spacing distances between all two adjacent lenses in the camera optical lens set on the optical axis is ΣAT, the object side surface of the third lens has a curvature radius of R5, and the image side surface of the third lens has a curvature radius of R6, satisfying the following relationship:

[0012] 20 <V4+V5<75;

[0013] 2.75<ΣCT / ΣAT; and

[0014] 0.10<(R5+R6) / (R5-R6).

[0015] When V4+V5 meets the above conditions, it helps to adjust the chromatic aberration correction of the lens to avoid excessive dispersion.

[0016] When ΣCT / ΣAT meets the above conditions, it helps to properly utilize the limited mirror group space, and effectively improves manufacturability and maintains imaging quality.

[0017] When (R5+R6) / (R5-R6) satisfies the above condition, the shape of the third lens allows light with a larger viewing angle to enter the lens, which helps to expand the viewing angle of the lens and ensure sufficient peripheral light to improve the peripheral relative illumination.

[0018] When |f / f1|+|f / f2| satisfies the above conditions, it can ensure that the refractive power of the lens is distributed more evenly, avoiding the overall refractive power being concentrated at the front end of the camera optical lens group, resulting in insufficient or excessive light correction and affecting the imaging quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1A Schematic diagram of an imaging device according to a first embodiment of the present invention.

[0020] Figure 1B 4 is an aberration curve diagram of the first embodiment of the present invention.

[0021] Figure 2A 2 is a schematic diagram of an imaging device according to a second embodiment of the present invention.

[0022] Figure 2B 4 is an aberration curve diagram of the second embodiment of the present invention.

[0023] Figure 3A Schematic diagram of an imaging device according to a third embodiment of the present invention.

[0024] Figure 3B 4 is an aberration curve diagram of the third embodiment of the present invention.

[0025] Figure 4A 2 is a schematic diagram of an imaging device according to a fourth embodiment of the present invention.

[0026] Figure 4B 4 is an aberration curve diagram of the fourth embodiment of the present invention.

[0027] Figure 5A Schematic diagram of an imaging device according to a fifth embodiment of the present invention.

[0028] Figure 5B 4 is an aberration curve diagram of the fifth embodiment of the present invention.

[0029] Fig. 6A 2 is a schematic diagram of an imaging device according to a sixth embodiment of the present invention.

[0030] Figure 6B 4 is an aberration curve diagram of the sixth embodiment of the present invention.

[0031] Fig. 7A 2 is a schematic diagram of an imaging device according to a seventh embodiment of the present invention.

[0032] Figure 7B 4 is an aberration curve diagram of the seventh embodiment of the present invention.

[0033] Figure 8 It is a three-dimensional schematic diagram of an imaging device according to an eighth embodiment of the present invention.

[0034] Fig.9A It is a three-dimensional schematic diagram of an electronic device according to a ninth embodiment of the present invention.

[0035] Fig. 9B FIG. 4 is a system block diagram of an electronic device according to a ninth embodiment of the present invention.

[0036] Figure Number:

[0037] Aperture: 100, 200, 300, 400, 500, 600, 700

[0038] Aperture 101, 201, 301, 401, 501, 601, 701

[0039] First lens 110, 210, 310, 410, 510, 610, 710

[0040] Object side 111, 211, 311, 411, 511, 611, 711

[0041] Like side 112, 212, 312, 412, 512, 612, 712

[0042] Second lens 120, 220, 320, 420, 520, 620, 720

[0043] Object side 121, 221, 321, 421, 521, 621, 721

[0044] Like side 122, 222, 322, 422, 522, 622, 722

[0045] The third lens 130, 230, 330, 430, 530, 630, 730

[0046] Object side 131, 231, 331, 431, 531, 631, 731

[0047] Like side 132, 232, 332, 432, 532, 632, 732

[0048] Fourth lens 140, 240, 340, 440, 540, 640, 740

[0049] Object side 141, 241, 341, 441, 541, 641, 741

[0050] Like side 142, 242, 342, 442, 542, 642, 742

[0051] Fifth lens 150, 250, 350, 450, 550, 650, 750

[0052] Object side 151, 251, 351, 451, 551, 651, 751

[0053] Like side 152, 252, 352, 452, 552, 652, 752

[0054] Sixth lens 160, 260, 360, 460, 560, 660, 760

[0055] Object side 161, 261, 361, 461, 561, 661, 761

[0056] Like side 162, 262, 362, 462, 562, 662, 762

[0057] Seventh lens 170, 270, 370, 470, 570, 670, 770

[0058] Object side 171, 271, 371, 471, 571, 671, 771

[0059] Like side 172, 272, 372, 472, 572, 672, 772

[0060] Filter elements 180, 280, 380, 480, 580, 680, 780

[0061] Imaging surface 190, 290, 390, 490, 590, 690, 790

[0062] Electronic photosensitive element 195, 295, 395, 495, 595, 695, 795

[0063] Image capturing devices 10a, 10b

[0064] Imaging lenses 11a, 11b

[0065] Driving devices 12a, 12b

[0066] Image stabilization modules 14a, 14b

[0067] Subject 30

[0068] Electronic device 20

[0069] Flash module 21

[0070] Focus Assist Module 22

[0071] Image signal processor 23

[0072] User Interface 24

[0073] Image software processor 25

[0074] Focal length f of the camera optical lens group

[0075] Aperture value Fno of the camera optical lens group

[0076] Half of the maximum viewing angle HFOV in the camera optical lens group

[0077] Maximum image height ImgH of camera optical lens group

[0078] The focal length of the first lens is f1

[0079] The focal length of the second lens is f2

[0080] The focal length of the third lens is f3

[0081] The focal length of the fourth lens is f4

[0082] The focal length of the fifth lens is f5

[0083] The focal length of the sixth lens is f6

[0084] Abbe number V of the lens

[0085] The refractive index of the lens is N

[0086] Abbe number V1 of the first lens

[0087] Abbe number V2 of the second lens

[0088] Abbe number V3 of the third lens

[0089] Abbe number V4 of the fourth lens

[0090] Abbe number V5 of the fifth lens

[0091] Abbe number V6 of the sixth lens

[0092] Abbe number V7 of the seventh lens

[0093] The refractive index of the first lens is N1

[0094] The refractive index of the second lens is N2

[0095] The refractive index of the third lens is N3

[0096] The refractive index of the fourth lens is N4

[0097] Refractive index of the fifth lens N5

[0098] Refractive index of the sixth lens N6

[0099] The refractive index of the seventh lens is N7

[0100] The radius of curvature of the third lens object side R5

[0101] The radius of curvature of the third lens image side surface R6

[0102] The curvature radius of the fourth lens image side surface is R8

[0103] The center thickness of the first lens on the optical axis is CT1

[0104] The center thickness of the second lens on the optical axis is CT2

[0105] The center thickness of the third lens on the optical axis is CT3

[0106] The center thickness of the fourth lens on the optical axis is CT4

[0107] The center thickness of the fifth lens on the optical axis is CT5

[0108] The center thickness of the sixth lens on the optical axis is CT6

[0109] The center thickness of the seventh lens on the optical axis is CT7

[0110] The distance TL between the object side of the first lens and the imaging surface on the optical axis

[0111] The sum of the thickness of each lens on the optical axis of the camera optical lens group ΣCT

[0112] The sum of the distances between all two adjacent lenses on the optical axis in the camera optical lens group ΣAT

[0113] The effective radius of the first lens object side Y11

[0114] The maximum effective radius of the image side of the sixth lens is Y62

[0115] The maximum effective radius of the seventh lens object side Y71

[0116] The effective radius of the seventh lens image side is Y72 DETAILED DESCRIPTION

[0117] The invention provides a camera optical lens set, which comprises seven lenses, which are sequentially from the object side to the image side: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens.

[0118] The image-side surface of the first lens may be a concave surface near the optical axis, which can balance the light paths in the tangential direction and the sagittal direction, so as to correct the lens astigmatism.

[0119] The third lens has positive refractive power, which can help provide sufficient refractive power for the camera optical lens set to reduce the sensitivity of the camera optical lens set and shorten the total length. The image side of the third lens is convex near the optical axis, which can correct the spherical aberration of the camera optical lens set and enhance the convergence quality of light.

[0120] The fourth lens may have a negative refractive power and can correct the aberration of the imaging optical lens group. The object side surface of the fourth lens may be convex near the optical axis, which helps correct the astigmatism of the imaging optical lens group. The object side surface of the fourth lens has at least one concave critical point near the optical axis, which helps correct the optical path of peripheral light. The image side surface of the fourth lens is concave near the optical axis, which helps shorten the back focal length of the lens to miniaturize the camera module. The image side surface of the fourth lens may have at least one convex critical point near the optical axis, which helps converge the peripheral light.

[0121] The fifth lens may have a negative refractive power and can cooperate with the fourth lens to further correct the aberration of the imaging optical lens group.

[0122] The sixth lens has a positive refractive power and can provide sufficient refractive power to shorten the total length of the lens. The object side surface of the sixth lens is concave near the optical axis, and the image side surface of the sixth lens is convex near the optical axis, which can further correct the aberration of the imaging optical lens group.

[0123] The object side surface of the seventh lens may be convex near the optical axis and may have at least one concave critical point off the axis, which helps correct the off-axis aberration. The image side surface of the seventh lens is concave near the optical axis and has at least one critical point off the axis, which can adjust the back focal length and correct the peripheral optical path at the same time.

[0124] The radius of curvature of the image side surface of the fourth lens is R8, the focal length of the imaging optical lens group is f, and the imaging optical lens group satisfies the following relationship: when 0.45 < f / R8, it helps shorten the back focal length of the lens and is easier to miniaturize the camera module. In addition, it can also satisfy: 0.60 < f / R8 < 3.0; it can also satisfy 0.75 < f / R8 < 2.0.

[0125] The sum of the thicknesses of each lens on the optical axis of the imaging optical lens group is ΣCT, and the sum of the spacing distances on the optical axis between all two adjacent lenses in the imaging optical lens group is ΣAT. When the imaging optical lens group satisfies the following relationship: 2.75 < ΣCT / ΣAT, it helps the lens to make good use of the limited space, effectively improve the manufacturability and maintain the imaging quality. In addition, it can also satisfy: 3.0 < ΣCT / ΣAT < 5.0.

[0126] 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. When the imaging optical lens group satisfies the following relationship: 0.10 < (R5 + R6) / (R5 - R6), it can ensure that the surface shape of the third lens allows light with a larger viewing angle to enter, which helps expand the viewing angle of the lens and can further ensure sufficient peripheral light to improve the peripheral relative illumination. In addition, it can also satisfy: 0.50 < (R5 + R6) / (R5 - R6) < 5.0; it can also satisfy: 1.0 ≦ (R5 + R6) / (R5 - R6) < 2.50.

[0127] The focal length of the imaging optical lens group is f, the focal length of the first lens is f1, and the focal length of the second lens is f2. When the imaging optical lens group satisfies the following relationship: |f / f1| + |f / f2| < 0.60, it can ensure that the refractive power distribution of the lens is relatively uniform, avoiding the overall refractive power concentrating at the front end of the imaging optical lens group, resulting in insufficient or excessive light correction and affecting the imaging quality. In addition, it can also satisfy |f / f1| + |f / f2| < 0.40.

[0128] The effective radius of the object side of the first lens is Y11, and the effective radius of the image side of the seventh lens is Y72. When the imaging optical lens group satisfies the following relationship: Y11 / Y72 < 0.50, it can effectively reduce the size of the front-end opening of the lens, contribute to the miniaturization of the lens volume, and make better use of the module space. In addition, it can also satisfy: Y11 / Y72 < 0.40.

[0129] The Abbe number of the fourth lens is V4, and the Abbe number of the fifth lens is V5. When the imaging optical lens group satisfies the following relationship: 20 < V4 + V5 < 75, it helps to adjust the chromatic aberration correction of the lens and avoid excessive chromatic dispersion. In addition, it can also satisfy: 25 < V4 + V5 < 55.

[0130] The focal length of the imaging optical 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 fourth lens is f4, the focal length of the fifth lens is f5, and the focal length of the sixth lens is f6. When the imaging optical lens group satisfies the following relationship: 1.0 < |f / f6| / (|f / f1| + |f / f2| + |f / f4| + |f / f5|) < 4.0, it can ensure that the refractive power distribution of the lens is relatively uniform, avoiding the overall refractive power concentrating at the rear end of the imaging optical lens group, resulting in poor light correction and affecting the imaging quality. In addition, it can also satisfy: 1.50 < |f / f6| / (|f / f1| + |f / f2| + |f / f4| + |f / f5|) < 3.0.

[0131] The effective radius of the image side of the seventh lens is Y72, and the focal length of the imaging optical lens group is f. When the imaging optical lens group satisfies the following relationship: 0.85 < Y72 / f, it can ensure that the seventh lens has sufficient effective area, which is beneficial to controlling the peripheral chief ray angle (CRA) or the size of the light cone, etc., and can further control the peripheral image illumination.

[0132] The maximum effective radius of the image side of the sixth lens is Y62, and the maximum effective radius of the object side of the seventh lens is Y71. The focal length of the imaging optical lens group is f. When the imaging optical lens group satisfies the following relationship: 0.20 < |Y71 - Y62| / f < 0.50, it can ensure that the imaging optical lens group has sufficient light-receiving effective area, which is beneficial to improving the peripheral image illumination.

[0133] The lens thickness of the first lens on the optical axis is CT1, the lens thickness of the second lens on the optical axis is CT2, the lens thickness of the third lens on the optical axis is CT3, the lens thickness of the fourth lens on the optical axis is CT4, the lens thickness of the fifth lens on the optical axis is CT5, the lens thickness of the sixth lens on the optical axis is CT6, and the lens thickness of the seventh lens on the optical axis is CT7; when the imaging optical lens group satisfies the following relational expressions: 1.0 < CT6 / CT1; 1.0 < CT6 / CT2; 1.0 < CT6 / CT3; 1.0 < CT6 / CT4; 1.0 < CT6 / CT5; 1.0 < CT6 / CT7, it can ensure that the sixth lens has sufficient lens thickness to improve the mechanical strength and manufacturability.

[0134] The Abbe number of a lens in the imaging optical lens group is V, and the refractive index of this lens is N. When at least one lens satisfies the following relational expression: 8.0 < V / N < 11.9, it is helpful to adjust the chromatic aberration correction of the lens and avoid excessive chromatic dispersion. In addition, at least two lenses can also satisfy: 8.0 < V / N < 11.9.

[0135] The distance between the object side of the first lens and the imaging surface on the optical axis is TL, and the focal length of the imaging optical lens group is f. When the imaging optical lens group satisfies the following relational expression: 1.5 < TL / f < 3.0, a more suitable balance can be obtained between the wide viewing angle and the short overall length. In addition, it can also satisfy: 1.75 < TL / f < 2.50.

[0136] The distance between the object side of the first lens and the imaging surface on the optical axis is TL, and the focal length of the imaging optical lens group is f. Half of the maximum viewing angle of the imaging optical lens group is HFOV. When the following relational expression 2.0 < TL / (f*sin(HFOV)) < 4.0 is satisfied, a more suitable balance can be obtained between the wide viewing angle and the short overall length.

[0137] The maximum viewing angle of the imaging optical lens group is FOV. When the following relational expression: 95 degrees < FOV < 130 degrees is satisfied, it can provide a sufficient viewing angle for more diverse applications.

[0138] The aperture value of the imaging optical lens group is Fno. When the following relational expression: 1.2 < Fno < 2.8 is satisfied, it helps to strengthen the feature of the large aperture of the present invention.

[0139] The distance between the object side of the first lens and the imaging surface on the optical axis is TL, and the maximum image height of the imaging optical lens group is ImgH (which can be half of the total diagonal length of the effective sensing area of the electronic photosensitive element). When the following relational expression: 0.70 < TL / ImgH < 1.60 is satisfied, the imaging optical lens group can be configured with a more suitable viewing angle and overall length.

[0140] The lens thickness of the first lens on the optical axis is CT1, the lens thickness of the second lens on the optical axis is CT2, and the lens thickness of the sixth lens on the optical axis is CT6. When the following relational expression is satisfied: 1.25 < CT6 / (CT1 + CT2) < 3.0, it helps to configure the sixth lens to have a relatively thick thickness, which is more beneficial to the overall structure of the imaging optical lens group. In addition, the following is also satisfied: 1.50 < CT6 / (CT1 + CT2) < 2.50.

[0141] Each of the technical features in the imaging optical lens group of the present invention described above can be combined and configured to achieve the corresponding effects.

[0142] In the imaging optical lens group disclosed 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 in configuring the refractive power of the lens system can be increased, and the glass lens can be made by techniques such as grinding or molding. If the material of the lens is plastic, the production cost can be effectively reduced. In addition, an aspherical surface (ASP) can be provided on the lens surface, thereby obtaining more control variables to reduce aberration, reduce the number of lenses, and effectively reduce the total length of the lens system of the present invention. The aspherical surface can be made by methods such as plastic injection molding or molding of glass lenses.

[0143] In the imaging optical lens group disclosed by the present invention, if the lens surface is an aspherical surface, it means that the entire or a part of the optically effective area of the lens surface is an aspherical surface.

[0144] If the lens surface is a convex surface and the position of the convex surface is not defined, it means that the lens surface can be a convex surface near the optical axis; if the lens surface is a concave surface and the position of the concave surface is not defined, it means that the lens surface can be a concave surface near the optical axis. If the refractive power or focal length of the lens is not defined in terms of 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.

[0145] In the imaging optical lens group provided by the present invention, additives can be selectively added to any (or more) of the lens materials 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 600 nm - 800 nm wavelength band in the system to reduce excess red light or infrared light; or it can filter light in the 350 nm - 450 nm 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 uniformly mixed in the plastic and made into a lens by injection molding technology.

[0146] In the imaging optical lens group disclosed by the present invention, the inflection point refers to the intersection point where the sign of the lens surface curvature changes. The critical point is 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.

[0147] In the camera optical lens group disclosed in the present invention, the imaging surface of the camera optical lens group can be a plane or a curved surface with any curvature, especially a curved surface with a concave surface facing the object side, depending on the different electronic photosensitive elements corresponding to it. In addition, one or more imaging correction elements (flat field elements, etc.) can be selectively arranged between the lens closest to the imaging surface and the imaging surface in the camera optical lens group of the present invention 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 camera optical lens group. Generally speaking, the preferred imaging correction element is configured as a thin plano-concave element with a concave surface facing the object side and is arranged close to the imaging surface.

[0148] In the camera optical lens group disclosed in the present invention, at least one aperture may be provided, which may be located before the first lens, between each lens or after the last lens. The aperture may be a glare stop or a field stop, etc., which may be used to reduce stray light and help improve image quality.

[0149] In the camera optical lens assembly disclosed in the present invention, the aperture configuration can be front or center. 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. The front aperture can make the exit pupil of the camera lens system have a longer distance from the imaging surface, so that it has a telecentric effect, which can increase the efficiency of electronic photosensitive elements such as CCD or CMOS in receiving images; the center aperture helps to expand the field of view of the lens, so that the camera lens system has the advantages of a wide-angle lens.

[0150] The present invention may appropriately set a variable aperture element, which may be a mechanical component or a light regulating component, 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 component 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.

[0151] The camera optical lens assembly of the present invention can also be widely used in three-dimensional (3D) image capture, digital cameras, mobile products, tablet computers, smart TVs, network monitoring equipment, somatosensory game consoles, driving recorders, reversing imaging devices, wearable products, drones and other electronic devices.

[0152] The present invention provides an imaging device, comprising the aforementioned imaging optical lens group and an electronic photosensitive element, wherein the electronic photosensitive element is disposed on an imaging surface of the imaging optical lens group. By reducing the optical effective radius of the first lens in the imaging optical lens group through the surface configuration of the first lens, the overall volume of the imaging optical lens group can be reduced, thereby achieving miniaturization of the imaging optical lens group. Preferably, the imaging device can further include a barrel member, a holder member, or a combination thereof.

[0153] The present invention provides an electronic device, comprising the aforementioned imaging device. The imaging device comprises an imaging optical lens group and an electronic photosensitive element, and the electronic photosensitive element is arranged on the imaging surface of the imaging optical lens group. Preferably, the electronic device may further comprise a control unit (Control Unit), a display unit (Display), a storage unit (Storage Unit), a temporary storage unit (RAM) or a combination thereof. Preferably, the electronic device may further comprise a control unit (Control Unit), a display unit (Display), a storage unit (Storage Unit), a temporary storage unit (RAM) or a combination thereof.

[0154] The camera optical lens assembly and the image capturing device disclosed in the present invention will be described in detail through the following specific embodiments in conjunction with the accompanying drawings.

[0155] "First Embodiment"

[0156] The first embodiment of the present invention can be found in Figure 1A , please refer to the aberration curve of the first embodiment Figure 1B The imaging device of the first embodiment includes an imaging optical lens group (not labeled) and an electronic photosensitive element 195. The imaging optical lens group includes a first lens 110, a second lens 120, an aperture 100, a third lens 130, a stop 101, a fourth lens 140, a fifth lens 150, a sixth lens 160, a seventh lens 170 and an imaging surface 190 in order from the object side to the image side. The electronic photosensitive element 195 is disposed on the imaging surface 190 of the imaging optical lens group. The imaging optical lens group includes seven lenses (110, 120, 130, 140, 150, 160, 170), and there is no other interpolated lens between the seven lenses.

[0157] The first lens 110 has negative refractive power and is made of plastic. Its object-side surface 111 is convex near the optical axis, and its image-side surface 112 is concave near the optical axis. Both the object-side surface 111 and the image-side surface 112 are aspherical surfaces.

[0158] The second lens 120 has positive 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 the object-side surface 121 and the image-side surface 122 are aspherical surfaces.

[0159] 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 the object-side surface 131 and the image-side surface 132 are aspherical surfaces.

[0160] 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 has at least one concave critical point off the axis. Its image-side surface 142 is concave near the optical axis and has at least one convex critical point off the axis. Both the object-side surface 141 and the image-side surface 142 are aspherical surfaces.

[0161] The fifth lens 150 has negative 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 concave near the optical axis. Both the object-side surface 151 and the image-side surface 152 are aspherical surfaces.

[0162] The sixth lens 160 has positive refractive power and is made of plastic. Its object-side surface 161 is concave near the optical axis, and its image-side surface 162 is convex near the optical axis. Both the object-side surface 161 and the image-side surface 162 are aspherical surfaces.

[0163] The seventh lens 170 has negative refractive power and is made of plastic. Its object-side surface 171 is convex near the optical axis and has at least one concave critical point off-axis. Its image-side surface 172 is concave near the optical axis and has at least one critical point off-axis. Both the object-side surface 171 and the image-side surface 172 are aspherical surfaces.

[0164] The filter element 180 is disposed between the seventh lens 170 and the imaging surface 190 . The filter element 180 is made of glass and does not affect the focal length.

[0165] The detailed optical data of the first embodiment are shown in Table 1, where the units of the radius of curvature, thickness and focal length are in millimeters, f represents focal length, Fno represents aperture value, HFOV represents half of the maximum viewing angle, and surfaces 0-18 represent surfaces from the object side to the image side in sequence. Its aspheric surface data are shown in Table 2, where k represents the cone coefficient in the aspheric curve equation, and A4-A20 represents the 4th-20th 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.

[0166]

[0167]

[0168]

[0169] The equation of the above aspheric curve is expressed as follows:

[0170]

[0171] in,

[0172] 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 vertex on the aspherical optical axis;

[0173] Y: the vertical distance between the point on the aspheric curve and the optical axis;

[0174] R: radius of curvature;

[0175] k: cone coefficient;

[0176] Ai: i-th order aspheric coefficient.

[0177] The focal length of the camera optical lens group is f, the aperture value of the camera optical lens group is Fno, and half of the maximum viewing angle in the camera optical lens group is HFOV, and its values ​​are: f=3.48 (mm), Fno=2.43, HFOV=54.0 (degrees).

[0178] The Abbe number of the first lens is V1, and the refractive index of the first lens is N1, which satisfies the relationship: V1 / N1=19.70.

[0179] The Abbe number of the second lens is V2, and the refractive index of the second lens is N2, which satisfies the relationship: V2 / N2=11.65.

[0180] The Abbe number of the third lens is V3, and the refractive index of the third lens is N3, which satisfies the relationship: V3 / N3=36.26.

[0181] The Abbe number of the fourth lens is V4, and the refractive index of the fourth lens is N4, which satisfies the relationship: V4 / N4=11.65.

[0182] The Abbe number of the fifth lens is V5, and the refractive index of the fifth lens is N5, which satisfies the relationship: V5 / N5=16.61.

[0183] The Abbe number of the sixth lens is V6, and the refractive index of the sixth lens is N6, which satisfies the relationship: V6 / N6=36.26.

[0184] The Abbe number of the seventh lens is V7, and the refractive index of the seventh lens is N7, which satisfies the relationship: V7 / N7=17.65.

[0185] The Abbe number of the fourth lens is V4, and the Abbe number of the fifth lens is V5, which satisfies the relationship: V4+V5=46.19.

[0186] The center thickness of the first lens on the optical axis is CT1, and the center thickness of the sixth lens on the optical axis is CT6, which satisfies the relationship: CT6 / CT1=4.11.

[0187] The center thickness of the first lens on the optical axis is CT1, the center thickness of the second lens on the optical axis is CT2, and the center thickness of the sixth lens on the optical axis is CT6, which satisfies the relationship: CT6 / (CT1+CT2)=2.07.

[0188] The center thickness of the second lens on the optical axis is CT2, and the center thickness of the sixth lens on the optical axis is CT6, which satisfies the relationship: CT6 / CT2=4.16.

[0189] The center thickness of the third lens on the optical axis is CT3, and the center thickness of the sixth lens on the optical axis is CT6, which satisfies the relationship: CT6 / CT3=2.52.

[0190] The center thickness of the fourth lens on the optical axis is CT4, and the center thickness of the sixth lens on the optical axis is CT6, which satisfies the relationship: CT6 / CT4=4.54.

[0191] The center thickness of the fifth lens on the optical axis is CT5, and the center thickness of the sixth lens on the optical axis is CT6, which satisfies the relationship: CT6 / CT5=4.01.

[0192] The center thickness of the sixth lens on the optical axis is CT6, and the center thickness of the seventh lens on the optical axis is CT7, which satisfy the relationship: CT6 / CT7=1.88.

[0193] The sum of the thicknesses of the lenses of the camera optical lens set on the optical axis is ΣCT, and the sum of the spacing distances between all two adjacent lenses in the camera optical lens set on the optical axis is ΣAT, which satisfies the relationship: ΣCT / ΣAT=3.58.

[0194] 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 relationship: (R5+R6) / (R5-R6)=0.96.

[0195] The focal length of the camera optical lens group is f, and the radius of curvature of the image side surface of the fourth lens is R8, which satisfies the relationship: f / R8=1.06.

[0196] The effective radius of the object side of the first lens is Y11, and the effective radius of the image side of the seventh lens is Y72, which satisfies the relationship: Y11 / Y72=0.35.

[0197] The maximum effective radius of the object side of the seventh lens is Y71, the maximum effective radius of the image side of the sixth lens is Y62, and the focal length of the camera optical lens group is f, which satisfies the relationship: |Y71-Y62| / f=0.29.

[0198] The distance between the object side surface of the first lens and the imaging surface on the optical axis is TL, and the focal length of the camera optical lens group is f, which satisfies the relationship: TL / f=1.94.

[0199] The distance between the object side surface of the first lens and the imaging surface on the optical axis is TL, the focal length of the camera optical lens group is f, and half of the maximum viewing angle of the camera optical lens group is HFOV, which satisfies the relationship: TL / (f*sin(HFOV))=2.39.

[0200] The distance between the object side surface of the first lens and the imaging surface on the optical axis is TL, and the focal length of the camera optical lens group is f, which satisfies the relationship: TL / ImgH=1.48.

[0201] The focal length of the camera optical lens group is f, the focal length of the first lens is f1, and the focal length of the second lens is f2, which satisfies the relationship: |f / f1|+|f / f2|=0.17.

[0202] The focal length of the camera optical 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 fourth lens is f4, the focal length of the fifth lens is f5, and the focal length of the sixth lens is f6, which satisfies the relationship: |f / f6| / (|f / f1|+|f / f2|+|f / f4|+|f / f5|)=1.97.

[0203] Second Embodiment

[0204] The second embodiment of the present invention can be found in Figure 2A , please refer to the aberration curve of the second embodiment Figure 2B The imaging device of the second embodiment includes an imaging optical lens group (not separately labeled) and an electronic photosensitive element 295. The imaging optical lens group includes a first lens 210, a second lens 220, an aperture 200, a third lens 230, a stop 201, a fourth lens 240, a fifth lens 250, a sixth lens 260, a seventh lens 270 and an imaging surface 290 in order from the object side to the image side. The electronic photosensitive element 295 is disposed on the imaging surface 290 of the imaging optical lens group. The imaging optical lens group includes seven lenses (210, 220, 230, 240, 250, 260, 270), and there is no other interpolated lens between the seven lenses.

[0205] The first lens 210 has positive refractive power and is made of plastic. Its object-side surface 211 is convex near the optical axis, and its image-side surface 212 is concave near the optical axis. Both the object-side surface 211 and the image-side surface 212 are aspherical surfaces.

[0206] 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 the object-side surface 221 and the image-side surface 222 are aspherical surfaces.

[0207] The third lens 230 has positive refractive power and is made of plastic. Its object-side surface 231 is concave near the optical axis, and its image-side surface 232 is convex near the optical axis. Both the object-side surface 231 and the image-side surface 232 are aspherical surfaces.

[0208] The fourth lens 240 has negative refractive power and is made of plastic. Its object-side surface 241 is convex near the optical axis and has at least one concave critical point off the axis. Its image-side surface 242 is concave near the optical axis and has at least one convex critical point off the axis. Both the object-side surface 241 and the image-side surface 242 are aspherical surfaces.

[0209] The fifth lens 250 has negative 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 concave near the optical axis. Both the object-side surface 251 and the image-side surface 252 are aspherical surfaces.

[0210] The sixth lens 260 has positive refractive power and is made of plastic. Its object-side surface 261 is concave near the optical axis, and its image-side surface 262 is convex near the optical axis. Both the object-side surface 261 and the image-side surface 262 are aspherical surfaces.

[0211] The seventh lens 270 has negative refractive power and is made of plastic. Its object-side surface 271 is convex near the optical axis and has at least one concave critical point off the axis. Its image-side surface 272 is concave near the optical axis and has at least one critical point off the axis. Both the object-side surface 271 and the image-side surface 272 are aspherical surfaces.

[0212] The filter element 280 is disposed between the seventh lens 270 and the imaging surface 290 . The filter element 280 is made of glass and does not affect the focal length.

[0213] The detailed optical data of the second embodiment are shown in Table 3, and the aspheric surface data thereof are shown in Table 4.

[0214]

[0215]

[0216]

[0217] The expression of the aspheric curve equation of the second embodiment is the same as that of the first embodiment. In addition, the parameters of each relational expression are the same as those explained in the first embodiment, but the values ​​of each relational expression are listed in the following table.

[0218]

[0219] "Third Embodiment"

[0220] The third embodiment of the present invention can be found in Figure 3A , please refer to the aberration curve of the third embodiment Figure 3B The imaging device of the third embodiment includes an imaging optical lens group (not separately labeled) and an electronic photosensitive element 395. The imaging 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, a seventh lens 370 and an imaging surface 390 in order from the object side to the image side. The electronic photosensitive element 395 is disposed on the imaging surface 390 of the imaging optical lens group. The imaging optical lens group includes seven lenses (310, 320, 330, 340, 350, 360, 370), and there is no other interpolated lens between the seven lenses.

[0221] The first lens 310 has positive refractive power and is made of plastic. Its object-side surface 311 is convex near the optical axis, and its image-side surface 312 is concave near the optical axis. Both the object-side surface 311 and the image-side surface 312 are aspherical surfaces.

[0222] 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 the object-side surface 321 and the image-side surface 322 are aspherical surfaces.

[0223] The third lens 330 has positive refractive power and is made of plastic. Its object-side surface 331 is concave near the optical axis, and its image-side surface 332 is convex near the optical axis. Both the object-side surface 331 and the image-side surface 332 are aspherical surfaces.

[0224] The fourth lens 340 has negative refractive power and is made of plastic. Its object-side surface 341 is convex near the optical axis and has at least one concave critical point off the axis. Its image-side surface 342 is concave near the optical axis and has at least one convex critical point off the axis. Both the object-side surface 341 and the image-side surface 342 are aspherical surfaces.

[0225] The fifth lens 350 has negative refractive power and is made of plastic. Its object-side surface 351 is convex near the optical axis, and its image-side surface 352 is concave near the optical axis. Both the object-side surface 351 and the image-side surface 352 are aspherical surfaces.

[0226] The sixth lens 360 has positive refractive power and is made of plastic. Its object-side surface 361 is concave near the optical axis, and its image-side surface 362 is convex near the optical axis. Both the object-side surface 361 and the image-side surface 362 are aspherical surfaces.

[0227] The seventh lens element 370 has negative refractive power and is made of plastic. Its object-side surface 371 is convex near the optical axis and has at least one concave critical point off the axis. Its image-side surface 372 is concave near the optical axis and has at least one critical point off the axis. Both the object-side surface 371 and the image-side surface 372 are aspherical surfaces.

[0228] The filter element 380 is disposed between the seventh lens 370 and the imaging surface 390 . The filter element 380 is made of glass and does not affect the focal length.

[0229] The detailed optical data of the third embodiment are shown in Table 5, and the aspheric surface data thereof are shown in Table 6.

[0230]

[0231]

[0232]

[0233] The expression of the aspheric curve equation of the third embodiment is the same as that of the first embodiment. In addition, the parameters of each relational expression are the same as those explained in the first embodiment, but the values ​​of each relational expression are listed in the following table.

[0234]

[0235]

[0236] "Fourth Embodiment"

[0237] The fourth embodiment of the present invention can be found in Figure 4A , please refer to the aberration curve of the fourth embodiment Figure 4B The imaging device of the fourth embodiment includes an imaging optical lens group (not separately labeled) and an electronic photosensitive element 495. The imaging optical lens group includes a first lens 410, a second lens 420, an aperture 400, a third lens 430, a stop 401, a fourth lens 440, a fifth lens 450, a sixth lens 460, a seventh lens 470 and an imaging surface 490 in order from the object side to the image side. The electronic photosensitive element 495 is disposed on the imaging surface 490 of the imaging optical lens group. The imaging optical lens group includes seven lenses (410, 420, 430, 440, 450, 460, 470), and there is no other interpolated lens between the seven lenses.

[0238] The first lens 410 has positive refractive power and is made of plastic. Its object-side surface 411 is convex near the optical axis, and its image-side surface 412 is concave near the optical axis. Both the object-side surface 411 and the image-side surface 412 are aspherical surfaces.

[0239] The second lens 420 has negative refractive power and is made of plastic. Its object-side surface 421 is concave near the optical axis, and its image-side surface 422 is concave near the optical axis. Both the object-side surface 421 and the image-side surface 422 are aspherical surfaces.

[0240] 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 the object-side surface 431 and the image-side surface 432 are aspherical surfaces.

[0241] The fourth lens 440 has negative refractive power and is made of plastic. Its object-side surface 441 is convex near the optical axis and has at least one concave critical point off the axis. Its image-side surface 442 is concave near the optical axis and has at least one convex critical point off the axis. Both the object-side surface 441 and the image-side surface 442 are aspherical surfaces.

[0242] The fifth lens element 450 has negative 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 the object-side surface 451 and the image-side surface 452 are aspherical surfaces.

[0243] The sixth lens element 460 has positive refractive power and is made of plastic. Its object-side surface 461 is concave near the optical axis, and its image-side surface 462 is convex near the optical axis. Both the object-side surface 461 and the image-side surface 462 are aspherical surfaces.

[0244] The seventh lens 470 has negative refractive power and is made of plastic. Its object-side surface 471 is convex near the optical axis and has at least one concave critical point off-axis. Its image-side surface 472 is concave near the optical axis and has at least one critical point off-axis. Both the object-side surface 471 and the image-side surface 472 are aspherical surfaces.

[0245] The filter element 480 is disposed between the seventh lens 470 and the imaging surface 490 . The filter element 480 is made of glass and does not affect the focal length.

[0246] The detailed optical data of the fourth embodiment are shown in Table 7, and the aspheric surface data thereof are shown in Table 8.

[0247]

[0248]

[0249] The expression of the aspheric curve equation of the fourth embodiment is the same as that of the first embodiment. In addition, the parameters of each relational expression are the same as those explained in the first embodiment, but the values ​​of each relational expression are listed in the following table.

[0250]

[0251]

[0252] "Fifth Embodiment"

[0253] The fifth embodiment of the present invention can be found in Figure 5A , please refer to the aberration curve of the fifth embodiment Figure 5B The imaging device of the fifth embodiment includes an imaging optical lens group (not separately labeled) and an electronic photosensitive element 595. The imaging optical lens group includes a first lens 510, a second lens 520, an aperture 500, a third lens 530, a stop 501, a fourth lens 540, a fifth lens 550, a sixth lens 560, a seventh lens 570 and an imaging surface 590 in order from the object side to the image side. The electronic photosensitive element 595 is disposed on the imaging surface 590 of the imaging optical lens group. The imaging optical lens group includes seven lenses (510, 520, 530, 540, 550, 560, 570), and there is no other interpolated lens between the seven lenses.

[0254] The first lens 510 has positive refractive power and is made of plastic. Its object-side surface 511 is convex near the optical axis, and its image-side surface 512 is concave near the optical axis. Both the object-side surface 511 and the image-side surface 512 are aspherical surfaces.

[0255] The second lens 520 has negative 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 the object-side surface 521 and the image-side surface 522 are aspherical surfaces.

[0256] The third lens 530 has positive refractive power and is made of plastic. Its object-side surface 531 is concave near the optical axis, and its image-side surface 532 is convex near the optical axis. Both the object-side surface 531 and the image-side surface 532 are aspherical surfaces.

[0257] The fourth lens 540 has negative refractive power and is made of plastic. Its object-side surface 541 is convex near the optical axis and has at least one concave critical point off the axis. Its image-side surface 542 is concave near the optical axis and has at least one convex critical point off the axis. Both the object-side surface 541 and the image-side surface 542 are aspherical surfaces.

[0258] The fifth lens element 550 has positive refractive power and is made of plastic. Its object-side surface 551 is convex near the optical axis, and its image-side surface 552 is convex near the optical axis. Both the object-side surface 551 and the image-side surface 552 are aspherical surfaces.

[0259] The sixth lens 560 has positive refractive power and is made of plastic. Its object-side surface 561 is concave near the optical axis, and its image-side surface 562 is convex near the optical axis. Both the object-side surface 561 and the image-side surface 562 are aspherical surfaces.

[0260] The seventh lens 570 has negative refractive power and is made of plastic. Its object-side surface 571 is convex near the optical axis and has at least one concave critical point off-axis. Its image-side surface 572 is concave near the optical axis and has at least one critical point off-axis. Both the object-side surface 571 and the image-side surface 572 are aspherical surfaces.

[0261] The filter element 580 is disposed between the seventh lens 570 and the imaging surface 590 . The filter element 580 is made of glass and does not affect the focal length.

[0262] The detailed optical data of the fifth embodiment are shown in Table 9, and the aspheric surface data thereof are shown in Table 10.

[0263]

[0264]

[0265]

[0266] The expression of the aspheric curve equation of the fifth embodiment is the same as that of the first embodiment. In addition, the parameters of each relational expression are the same as those explained in the first embodiment, but the values ​​of each relational expression are listed in the following table.

[0267]

[0268] Sixth Embodiment

[0269] The sixth embodiment of the present invention can be found in Fig. 6A , please refer to the aberration curve of the sixth embodiment Figure 6B The imaging device of the sixth embodiment includes an imaging optical lens group (not labeled) and an electronic photosensitive element 695. The imaging optical lens group includes a first lens 610, a second lens 620, an aperture 600, a third lens 630, a stop 601, a fourth lens 640, a fifth lens 650, a sixth lens 660, a seventh lens 670 and an imaging surface 690 in order from the object side to the image side. The electronic photosensitive element 695 is disposed on the imaging surface 690 of the imaging optical lens group. The imaging optical lens group includes seven lenses (610, 620, 630, 640, 650, 660, 670), and there is no other interpolated lens between the seven lenses.

[0270] The first lens 610 has positive refractive power and is made of plastic. Its object-side surface 611 is convex near the optical axis, and its image-side surface 612 is concave near the optical axis. Both the object-side surface 611 and the image-side surface 612 are aspherical surfaces.

[0271] 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 convex near the optical axis. Both the object-side surface 621 and the image-side surface 622 are aspherical surfaces.

[0272] The third lens 630 has positive refractive power and is made of plastic. Its object-side surface 631 is concave near the optical axis, and its image-side surface 632 is convex near the optical axis. Both the object-side surface 631 and the image-side surface 632 are aspherical surfaces.

[0273] The fourth lens 640 has negative refractive power and is made of plastic. Its object-side surface 641 is convex near the optical axis and has at least one concave critical point off the axis. Its image-side surface 642 is concave near the optical axis and has at least one convex critical point off the axis. Both the object-side surface 641 and the image-side surface 642 are aspherical surfaces.

[0274] The fifth lens 650 has negative 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 concave near the optical axis. Both the object-side surface 651 and the image-side surface 652 are aspherical surfaces.

[0275] The sixth lens 660 has positive refractive power and is made of plastic. Its object-side surface 661 is concave near the optical axis, and its image-side surface 662 is convex near the optical axis. Both the object-side surface 661 and the image-side surface 662 are aspherical surfaces.

[0276] The seventh lens 670 has negative refractive power and is made of plastic. Its object-side surface 671 is convex near the optical axis and has at least one concave critical point off-axis. Its image-side surface 672 is concave near the optical axis and has at least one critical point off-axis. Both the object-side surface 671 and the image-side surface 672 are aspherical.

[0277] The filter element 680 is disposed between the seventh lens 670 and the imaging surface 690 . The filter element 680 is made of glass and does not affect the focal length.

[0278] The detailed optical data of the sixth embodiment is shown in Table 11, and the aspheric surface data thereof is shown in Table 12.

[0279]

[0280]

[0281]

[0282]

[0283] The expression of the aspheric curve equation of the sixth embodiment is the same as that of the first embodiment. In addition, the parameters of each relational expression are the same as those explained in the first embodiment, but the values ​​of each relational expression are listed in the following table.

[0284]

[0285] Seventh Embodiment

[0286] The seventh embodiment of the present invention can be found in Fig. 7A , please refer to the aberration curve of the seventh embodiment Figure 7B The imaging device of the seventh embodiment includes an imaging optical lens group (not labeled) and an electronic photosensitive element 795. The imaging optical lens group includes a first lens 710, a second lens 720, an aperture 700, a third lens 730, a stop 701, a fourth lens 740, a fifth lens 750, a sixth lens 760, a seventh lens 770 and an imaging surface 790 in order from the object side to the image side. The electronic photosensitive element 795 is disposed on the imaging surface 790 of the imaging optical lens group. The imaging optical lens group includes seven lenses (710, 720, 730, 740, 750, 760, 770), and there is no other interpolated lens between the seven lenses.

[0287] The first lens 710 has positive refractive power and is made of plastic. Its object-side surface 711 is convex near the optical axis, and its image-side surface 712 is concave near the optical axis. Both the object-side surface 711 and the image-side surface 712 are aspherical surfaces.

[0288] The second lens 720 has negative 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 concave near the optical axis. Both the object-side surface 721 and the image-side surface 722 are aspherical surfaces.

[0289] The third lens 730 has positive refractive power and is made of plastic. Its object-side surface 731 is flat near the optical axis, and its image-side surface 732 is convex near the optical axis. Both the object-side surface 731 and the image-side surface 732 are aspherical surfaces.

[0290] The fourth lens 740 has negative refractive power and is made of plastic. Its object-side surface 741 is concave near the optical axis, its image-side surface 742 is concave near the optical axis and has at least one convex critical point off-axis. Both the object-side surface 741 and the image-side surface 742 are aspherical.

[0291] The fifth lens element 750 has negative 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 concave near the optical axis. Both the object-side surface 751 and the image-side surface 752 are aspherical surfaces.

[0292] The sixth lens 760 has positive refractive power and is made of plastic. Its object-side surface 761 is concave near the optical axis, and its image-side surface 762 is convex near the optical axis. Both the object-side surface 761 and the image-side surface 762 are aspherical surfaces.

[0293] The seventh lens 770 has negative refractive power and is made of plastic. Its object-side surface 771 is convex near the optical axis and has at least one concave critical point off the axis. Its image-side surface 772 is concave near the optical axis and has at least one critical point off the axis. Both the object-side surface 771 and the image-side surface 772 are aspherical surfaces.

[0294] The filter element 780 is disposed between the seventh lens 770 and the imaging surface 790 . The filter element 780 is made of glass and does not affect the focal length.

[0295] The detailed optical data of the seventh embodiment are shown in Table 13, and the aspheric surface data thereof are shown in Table 14.

[0296]

[0297]

[0298]

[0299]

[0300] The expression of the aspheric curve equation of the seventh embodiment is the same as that of the first embodiment. In addition, the parameters of each relational expression are the same as those explained in the first embodiment, but the values ​​of each relational expression are listed in the following table.

[0301]

[0302] "Eighth Embodiment"

[0303] Please refer to Figure 8 , is a three-dimensional schematic diagram illustrating an imaging device 10a according to an eighth embodiment of the present invention. Figure 8 It can be seen that in this embodiment, the image capturing device 10a is a camera module. The image capturing device 10a includes an imaging lens 11a, a driving device 12a, and an electronic photosensitive element 13a, wherein the imaging lens 11a includes the camera optical lens group of the first embodiment of the present invention and a lens barrel (not separately labeled) that carries the camera optical lens group. The image capturing device 10a uses the imaging lens 11a to focus light to generate an image, and cooperates with the driving device 12a to focus the image, and finally forms an image on the electronic photosensitive element 13a, and outputs the image data.

[0304] The driving device 12a 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 12a can allow the imaging lens 11a to obtain a better imaging position, and can provide the subject 30 (please refer to Fig. 9B ) can capture clear images at different object distances.

[0305] The image capturing device 10a may be equipped with an electronic photosensitive element 13a (such as CMOS, CCD) with good sensitivity and low noise interference, which is disposed on the imaging surface of the camera optical lens group, and can truly present the good imaging quality of the camera optical lens group.

[0306] In addition, the image capturing device 10a may further include an image stabilization module 14a, 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 14a is a gyroscope, but the present invention is not limited thereto. By adjusting the changes in different axial directions of the camera lens system 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.

[0307] Ninth Embodiment

[0308] Please refer to Fig.9A and Fig. 9B ,in Fig.9A is a three-dimensional schematic diagram illustrating an electronic device 20 according to a ninth embodiment of the present invention. Fig. 9B It is shown Fig.9A In this embodiment, the electronic device 20 is a smart phone. The electronic device 20 includes the image capturing device 10a and the image capturing device 10b of the eighth embodiment, a flash module 21, a focus assist module 22, an image signal processor 23, a user interface 24, and an image software processor 25 (please refer to Fig. 9B ).

[0309] In the present embodiment, the electronic device 20 includes two imaging devices 10a and 10b facing the same direction. The imaging device 10a is a main lens, and the imaging device 10b is a wide-angle lens. The imaging device 10b may also be a telephoto lens, but the present invention is not limited thereto. For example, both imaging devices may be imaging devices 10a or other configurations. In addition, the electronic device 20 may also include only one imaging device 10a, or may include more than three imaging devices (imaging device 10a, wide-angle lens, telephoto lens).

[0310] When the user uses the user interface 24 to select the object 30 (see Fig. 9B ) to shoot, the electronic device 20 uses at least one of the image capturing device 10a and the image capturing device 10b to focus and capture images, activates the flash module 21 for fill light, and uses the object distance information of the object 30 provided by the focus assist module 22 to quickly focus, and the image signal processor 23 performs image optimization processing to further improve the image quality produced by the camera lens system. The focus assist module 22 can use an infrared or laser focus assist system to achieve fast focus, and the user interface 24 can use a touch screen or a physical shooting button to cooperate with the diverse functions of the image software processor 25 to perform image shooting and image processing.

[0311] The imaging device 10a of the present invention is not limited to being used in smart phones. The imaging device 10a can be used in a mobile focus system according to needs, and has the characteristics of excellent aberration correction and good imaging quality. For example, the imaging device 10a can be used in various electronic devices such as automotive electronic devices, drones, smart electronic products, tablet computers, wearable devices, medical equipment, precision instruments, surveillance cameras, portable image recorders, recognition systems, multi-lens devices, body sensing detection, virtual reality, sports devices, and home smart assistance systems.

[0312] The aforementioned electronic device is only an example of the actual application of the present invention, and does not limit the application scope of the imaging device of the present invention. Preferably, the electronic device may further include a control unit, a display unit, a storage unit, a temporary storage unit (RAM) or a combination thereof.

[0313] The above tables show different numerical variation tables of the camera optical lens group in the embodiments disclosed in the present invention. However, the numerical variation of each embodiment of the present invention is obtained by experiment. Even if different numerical values ​​are used, products with the same structure should still fall within the protection scope disclosed in the present invention. Therefore, the above description and drawings are only for illustrative purposes and are not intended to limit the protection scope of the claims disclosed in the present invention.

Claims

1. A camera optical lens assembly, characterized in that: The total number of lenses in the imaging optical lens group is seven lenses, and the seven lenses are, 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, a sixth lens, and a seventh lens; Among them, the third lens has a positive refractive power, and the image side surface of the third lens is convex near the optical axis; the fourth lens has a negative refractive power, and the image side surface of the fourth lens is concave 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 concave near the optical axis, and the image side surface of the sixth lens is convex near the optical axis; the seventh lens has a negative refractive power, the image side surface of the seventh lens is concave near the optical axis and has at least one critical point off the axis, and both the object side surface and the image side surface of the seventh lens are aspherical; Among them, the Abbe number of the fourth lens is V4, the Abbe number of the fifth lens is V5, the sum of the thicknesses of the lenses on the optical axis of the imaging optical lens group is ΣCT, the sum of the spacing distances between all adjacent lenses on the optical axis in the imaging optical lens group is ΣAT, the curvature radius of the object side surface of the third lens is R5, the curvature radius of the image side surface of the third lens is R6, the curvature radius of the image side surface of the fourth lens is R8, the focal length of the imaging optical lens group is f, the focal length of the first lens is f1, the focal length of the second lens is f2, and the following relational expressions are satisfied: 20 < V4 + V5 < 75 or V4 + V5 = 79.78; 2.75 < ΣCT / ΣAT; 0.10 < (R5 + R6) / (R5 - R6); |f / f1| + |f / f2| < 0.60; and 0.45 < f / R8.

2. The imaging optical lens assembly according to claim 1, wherein: The image side surface of the first lens is concave near the optical axis, the distance between the object side surface of the first lens and the imaging surface on the optical axis is TL, the focal length of the imaging optical lens group is f, and the following relational expression is satisfied: 1.5 < TL / f < 3.

0.

3. The imaging optical lens assembly according to claim 1, wherein: The second lens has a positive refractive power, the object side surface of the seventh lens is convex near the optical axis, and the object side surface of the seventh lens has at least one concave critical point off the axis.

4. The imaging optical lens assembly according to claim 1, wherein: The sum of the thicknesses of the lenses on the optical axis of the imaging optical lens group is ΣCT, the sum of the spacing distances between all adjacent lenses on the optical axis in the imaging optical lens group is ΣAT, and the following relational expression is satisfied: 3.0 < ΣCT / ΣAT < 5.

0.

5. The imaging optical lens assembly according to claim 1, wherein: The effective radius of the image side surface of the seventh lens is Y72, the focal length of the imaging optical lens group is f, and the following relational expression is satisfied: 0.85 < Y72 / f.

6. The imaging optical lens assembly according to claim 1, wherein: The Abbe number of the fourth lens is V4, the Abbe number of the fifth lens is V5, the curvature radius of the object side surface of the third lens is R5, the curvature radius of the image side surface of the third lens is R6, and the following relational expressions are satisfied: 46.19 ≤ V4 + V5 < 75 or V4 + V5 = 79.78; and 0.50 < (R5 + R6) / (R5 - R6) ≤ 1.

51.

7. The imaging optical lens assembly according to claim 1, wherein: The Abbe number of a lens is V, the refractive index of the lens is N, and at least one lens satisfies 8.0 < V / N < 11.

9.

8. The imaging optical lens assembly according to claim 1, wherein: The distance between the object side surface of the first lens and the imaging surface on the optical axis is TL, the focal length of the imaging optical lens group is f, and half of the maximum viewing angle of the imaging optical lens group is HFOV, satisfying the following relational expression: 2.0 < TL / (f * sin(HFOV)) < 4.

0.

9. The imaging optical lens assembly according to claim 1, wherein: The maximum viewing angle of the imaging optical lens group is FOV, and the F-number of the imaging optical lens group is Fno, satisfying the following relational expressions: 95 degrees < FOV < 130 degrees; and 1.2 < Fno < 2.

8.

10. A camera optical lens assembly, characterized in that: The total number of lenses in the imaging optical lens group is seven lenses, and the seven lenses are, in order from the object side to the image side, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens; Among them, the third lens has positive refractive power, and the image side surface of the third lens is convex near the optical axis; the fourth lens has negative refractive power, the object side surface of the fourth lens is convex near the optical axis, and the image side surface of the fourth lens is concave near the optical axis; the fifth lens has negative refractive power; the sixth lens has positive refractive power, the object side surface of the sixth lens is concave near the optical axis, and the image side surface of the sixth lens is convex near the optical axis; the seventh lens has negative refractive power, the image side surface of the seventh lens is concave near the optical axis and has at least one critical point off the axis, and both the object side surface and the image side surface of the seventh lens are aspherical surfaces; Among them, the Abbe number of the fourth lens is V4, the Abbe number of the fifth lens is V5, the sum of the thicknesses of all the lenses of the imaging optical lens group on the optical axis is ΣCT, the sum of the spacing distances between all adjacent lenses of the imaging optical lens group on the optical axis is ΣAT, 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 radius of curvature of the image side surface of the fourth lens is R8, and the focal length of the imaging optical lens group is f, satisfying the following relational expressions: 25 < V4 + V5 < 75; 2.75 < ΣCT / ΣAT; 0.10 < (R5 + R6) / (R5 - R6); and 0.45 < f / R8.

11. The imaging optical lens assembly according to claim 10, wherein: The image side surface of the first lens is concave near the optical axis, the distance between the object side surface of the first lens and the imaging surface on the optical axis is TL, and the focal length of the imaging optical lens group is f, satisfying the following relational expression: 1.5 < TL / f < 2.

50.

12. The imaging optical lens assembly according to claim 10, wherein: The second lens has positive refractive power, the object side surface of the seventh lens is convex near the optical axis, and the object side surface of the seventh lens has at least one concave critical point off the axis.

13. The imaging optical lens assembly according to claim 10, wherein: 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, satisfying the following relational expression: 1.0 ≦ (R5 + R6) / (R5 - R6) < 2.

50.

14. The imaging optical lens assembly according to claim 10, wherein: The sum of the thicknesses of all the lenses of the imaging optical lens group on the optical axis is ΣCT, and the sum of the spacing distances between all adjacent lenses of the imaging optical lens group on the optical axis is ΣAT, satisfying the following relational expression: 2.75 < ΣCT / ΣAT ≦ 4.

06.

15. The imaging optical lens assembly according to claim 10, wherein: The focal length of the imaging optical 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 fourth lens is f4, the focal length of the fifth lens is f5, and the focal length of the sixth lens is f6, satisfying the following relational expressions: 1.0 < |f / f6| / (|f / f1| + |f / f2| + |f / f4| + |f / f5|) < 4.

0.

16. The imaging optical lens assembly according to claim 10, wherein: The effective radius of the image side surface of the seventh lens is Y72, the focal length of the imaging optical lens group is f, and the following relational expression is satisfied: 0.85 < Y72 / f.

17. The imaging optical lens assembly according to claim 10, wherein: The Abbe number of the fourth lens is V4, the Abbe number of the fifth lens is V5, the focal length of the imaging optical lens group is f, and the radius of curvature of the image side surface of the fourth lens is R8, and the following relational expressions are satisfied: 25 < V4 + V5 < 55; and 0.60 < f / R8 ≤ 1.

26.

18. The imaging optical lens assembly according to claim 10, wherein: The Abbe number of a lens is V, the refractive index of the lens is N, and at least one lens satisfies 8.0 < V / N < 11.

9.

19. The imaging optical lens assembly according to claim 10, wherein: The distance between the object side surface of the first lens and the imaging surface on the optical axis is TL, the focal length of the imaging optical lens group is f, and half of the maximum viewing angle of the imaging optical lens group is HFOV, and the following relational expression is satisfied: 2.0 < TL / (f * sin(HFOV)) < 4.0.

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