Imaging lens assembly and camera module

Abstract

The present application is an imaging lens assembly, sequentially comprising, from the object side to the image side: a first lens with negative refractive power; a second lens with negative refractive power; a third lens with positive refractive power; an aperture; a fourth lens with positive refractive power; a fifth lens with negative refractive power; a sixth lens with positive refractive power; and a seventh lens with negative refractive power; wherein the focal length of the first lens is f1, the focal length of the sixth lens is f6, and the following condition is satisfied: -5.74 < f1 / f6 < -1.83. Thus, it helps to reduce the influence of ambient temperature on the lens assembly, while helping to balance the refractive power configuration of the imaging lens assembly, correct aberrations and reduce sensitivity.

Description

Technical Field

[0001] This invention relates to the field of imaging lens assemblies and camera modules, and particularly to an imaging lens assembly and camera module for use in electronic products. Background Technology

[0002] With the widespread adoption of smartphones and tablets, small camera lenses are widely used in various electronic devices, such as game consoles, dashcams, and surveillance camera lenses. Surveillance camera lenses, in particular, employ a dual-band optical system for both visible and infrared light to enable all-day use. To achieve high image quality for both day and night recording, surveillance camera lenses often consist of two separate optical systems. This design not only results in a large size but also a complex overall structure. If a surveillance camera lens uses a shared optical system for both visible and infrared light bands, its infrared image quality is relatively poor. Therefore, developing a thin surveillance camera lens that achieves high-resolution image quality in both the visible and infrared light bands is a pressing technological challenge that needs to be overcome. Summary of the Invention

[0003] The purpose of this invention is to provide an imaging lens assembly and a camera module. The imaging lens assembly includes seven lenses with refractive power. Under certain conditions, the imaging lens assembly provided by this invention can achieve high-resolution imaging quality in both the visible light and infrared light bands, and can also achieve thinness and ultra-wide viewing angle.

[0004] In addition, when the lens material is glass, the imaging lens assembly provided by the present invention can be used in environments with more extreme temperatures.

[0005] An imaging lens group provided by the present invention sequentially includes, from the object side to the image side: a first lens having a negative refractive power, wherein the object-side surface of the first lens is convex near the optical axis, and the image-side surface of the first lens is concave near the optical axis; a second lens having a negative refractive power, wherein the object-side surface of the second lens is convex near the optical axis, and the image-side surface of the second lens is concave near the optical axis, and at least one of the object-side surface and the image-side surface of the second lens is an aspherical surface; a third lens having a positive refractive power, wherein the image-side surface of the third lens is convex near the optical axis, and at least one of the object-side surface and the image-side surface of the third lens is an aspherical surface; an aperture; a fourth lens having a positive refractive power, wherein the object-side surface of the fourth lens is convex near the optical axis, and the image-side surface of the fourth lens is convex near the optical axis, and at least one of the object-side surface and the image-side surface of the fourth lens is an aspherical surface; a fifth lens having a negative refractive power, wherein the object-side surface of the fifth lens is concave near the optical axis, and the image-side surface of the fifth lens is concave near the optical axis, and both the object-side surface and the image-side surface of the fifth lens are aspherical surfaces; a sixth lens having a positive refractive power, wherein the object-side surface of the sixth lens is convex near the optical axis, and the image-side surface of the sixth lens is convex near the optical axis; and a seventh lens having a negative refractive power, wherein the object-side surface of the seventh lens is convex near the optical axis, and the image-side surface of the seventh lens is concave near the optical axis, and at least one of the object-side surface and the image-side surface of the seventh lens is an aspherical surface;

[0006] Where the focal length of the first lens is f1 and the focal length of the sixth lens is f6, and the following conditions are satisfied: -5.74 < f1 / f6 < -1.83. More preferably, the following conditions can also be satisfied: -4.78 < f1 / f6 < -2.29.

[0007] Preferably, the total number of refractive lenses in the imaging lens group is seven.

[0008] The efficacy of the present invention is that when the above seven refractive lenses are combined with -5.74 < f1 / f6 < -1.83, it helps to reduce the influence of environmental temperature on the lens group, and at the same time helps to balance the refractive power configuration of the imaging lens group, and can correct aberration and reduce sensitivity.

[0009] Preferably, when the first lens and / or the sixth lens is made of glass, the imaging lens group can be used in a relatively extreme temperature environment.

[0010] Preferably, the overall focal length of the imaging lens group is f, and the focal length of the first lens is f1, and the following conditions are satisfied: -0.34 < f / f1 < -0.1. Accordingly, the ratio of the focal length of the first lens to the focal length of the lens group can enhance its wide-angle characteristics to provide a larger viewing angle and maintain the illuminance of the lens group.

[0011] Preferably, the focal length of the fifth lens is f5, and the focal length of the seventh lens is f7, and the following condition is satisfied: 0.11 < f5 / f7 < 0.71. Thereby, it is beneficial to reduce the influence caused by the manufacturing tolerance of the sixth lens.

[0012] Preferably, the focal length of the fifth lens is f5, the focal length of the sixth lens is f6, and the focal length of the seventh lens is f7, and the following condition is satisfied: 0.44 < f7 / (f5*f6) < 4.06. Thereby, the refractive power distribution of the lens group is more appropriate, and the focus shift amount of the lens group in visible light and infrared light can be reduced.

[0013] Preferably, the focal length of the fifth lens is f5, the radius of curvature R10 of the image side surface of the fifth lens, and the thickness CT5 of the fifth lens on the optical axis satisfy the following condition: -4.82 < f5 / (R10*CT5) < -2.04. Thereby, it helps the fifth lens to achieve an appropriate balance between lens formability and refractive power.

[0014] Preferably, the thickness CT1 of the first lens on the optical axis, the thickness CT2 of the second lens on the optical axis, the radius of curvature R2 of the image side surface of the first lens, and the radius of curvature R4 of the image side surface of the second lens satisfy the following condition: 0.17 < (CT1 + CT2) / (R2*R4) < 1.05. Thereby, a larger viewing angle is provided and better lens formability is achieved.

[0015] Preferably, the focal length of the third lens is f3, the focal length of the fifth lens is f5, and the focal length of the seventh lens is f7, and the following condition is satisfied: 0.3 < f3 / (f5*f7) < 1.58. Thereby, the refractive power distribution of the lens group is more appropriate, which is beneficial to correcting the lens group aberration to improve the imaging quality of the lens group.

[0016] Preferably, the focal length of the second lens is f2, the focal length of the fourth lens is f4, and the focal length of the sixth lens is f6, and the following condition is satisfied: -1.46 < f2 / (f4*f6) < -0.58. Thereby, the refractive power distribution of the lens group is more appropriate, which is beneficial to correcting the lens group aberration to improve the imaging quality of the lens group.

[0017] Preferably, the radius of curvature R13 of the object side surface of the seventh lens, the radius of curvature R14 of the image side surface of the seventh lens, and the focal length f7 of the seventh lens satisfy the following condition: -2.27 < R13 / (R14*f7) < -0.18. Thereby, the ability of the seventh lens to correct the lens group aberration and the angle of the principal ray of the incident imaging surface are adjusted.

[0018] Preferably, the focal length of the seventh lens is f7, the thickness of the seventh lens on the optical axis is CT7, and the radius of curvature of the image-side surface of the seventh lens is R14, and the following conditions are satisfied: -2.19 < f7 * CT7 / R14 < -0.62. Thus, it is beneficial to achieve an appropriate balance between the lens formability and refractive power of the seventh lens.

[0019] Preferably, the focal length of the fourth lens is f4, the focal length of the fifth lens is f5, the radius of curvature of the object-side surface of the fourth lens is R7, the radius of curvature of the image-side surface of the fourth lens is R8, and the radius of curvature of the image-side surface of the fifth lens is R10, and the following conditions are satisfied: 0.34 < (R10 * f5) / (R7 * R8 * f4) < 1.08. Thus, the configurations of the fourth lens and the fifth lens are more appropriate, improving the ghost image problem between the lenses.

[0020] Preferably, the radius of curvature of the object-side surface of the first lens is R1, and the radius of curvature of the image-side surface of the first lens is R2, and the following conditions are satisfied: 0.26 < R2 / R1 < 0.56. Thus, the influence of manufacturing tolerances on the imaging quality is reduced and good formability is maintained.

[0021] The present invention further provides an imaging module, comprising: a lens barrel; each of the foregoing imaging lens groups disposed in the lens barrel; and an image sensor disposed on the imaging surface of the imaging lens group.

[0022] The present invention further provides an imaging module, comprising: a lens barrel; an imaging lens group disposed in the lens barrel; and an image sensor disposed on the imaging surface of the imaging lens group;

[0023] The imaging lens group includes, in order from the object side to the image side: a first lens having a negative refractive power, with a convex surface near the optical axis on the object side surface of the first lens and a concave surface near the optical axis on the image side surface of the first lens; a second lens having a negative refractive power, with a convex surface near the optical axis on the object side surface of the second lens and a concave surface near the optical axis on the image side surface of the second lens, and at least one of the object side surface and the image side surface of the second lens being an aspherical surface; a third lens having a positive refractive power, with a convex surface near the optical axis on the image side surface of the third lens, and at least one of the object side surface and the image side surface of the third lens being an aspherical surface; an aperture; a fourth lens having a positive refractive power, with a convex surface near the optical axis on the object side surface of the fourth lens and a convex surface near the optical axis on the image side surface of the fourth lens, and at least one of the object side surface and the image side surface of the fourth lens being an aspherical surface; a fifth lens having a negative refractive power, with a concave surface near the optical axis on the object side surface of the fifth lens and a concave surface near the optical axis on the image side surface of the fifth lens, and at least one of the object side surface and the image side surface of the fifth lens being an aspherical surface; a sixth lens having a positive refractive power, with a convex surface near the optical axis on the object side surface of the sixth lens and a convex surface near the optical axis on the image side surface of the sixth lens; and a seventh lens having a negative refractive power, with a convex surface near the optical axis on the object side surface of the seventh lens and a concave surface near the optical axis on the image side surface of the seventh lens, and at least one of the object side surface and the image side surface of the seventh lens being an aspherical surface;

[0024] The distance from the object side surface of the first lens to the imaging surface on the optical axis is TL, the radius of curvature R4 of the image side surface of the second lens, and half of the diagonal length of the effective pixel region of the image sensor is IMH, and the following conditions are satisfied: 2.7 < TL * R4 / IMH < 9.23. More preferably, the following conditions can also be satisfied: 3.37 < TL * R4 / IMH < 7.69.

[0025] Preferably, the total number of lenses with refractive power in the imaging lens group is seven.

[0026] The effect of the present invention is that when the above seven lenses with refractive power are combined with 2.7 < TL * R4 / IMH < 9.23, it helps to achieve an appropriate balance between miniaturization and the effective pixel region. More preferably, the following conditions can also be satisfied: 3.37 < TL * R4 / IMH < 7.69.

[0027] Preferably, when the first lens and / or the sixth lens are made of glass material, the imaging lens group can be used in a relatively extreme temperature environment.

[0028] Preferably, the focal length of the first lens is f1, and the focal length of the sixth lens is f6, satisfying the following condition: -5.74 < f1 / f6 < -1.83. Thereby, it helps to reduce the influence of environmental temperature on the lens group, and at the same time helps to balance the refractive power configuration of the imaging lens group, correct aberration and reduce sensitivity.

[0029] Preferably, the overall focal length of the imaging lens group is f, and the focal length of the first lens is f1, satisfying the following condition: -0.34 < f / f1 < -0.1. Accordingly, the ratio of the focal length of the first lens to the focal length of the lens group can enhance its wide-angle characteristics to provide a larger viewing angle and maintain the illuminance of the lens group.

[0030] Preferably, the focal length of the fifth lens is f5, and the focal length of the seventh lens is f7, satisfying the following condition: 0.11 < f5 / f7 < 0.71. Thereby, it is beneficial to reduce the influence caused by the manufacturing tolerance of the sixth lens.

[0031] Preferably, the focal length of the fifth lens is f5, the focal length of the sixth lens is f6, and the focal length of the seventh lens is f7, satisfying the following condition: 0.44 < f7 / (f5 * f6) < 4.06. Thereby, the refractive power distribution of the lens group is more appropriate, and the focus shift amount of the lens group in visible light and infrared light can be reduced.

[0032] Preferably, the focal length of the fifth lens is f5, the radius of curvature of the image side surface of the fifth lens is R10, and the thickness of the fifth lens on the optical axis is CT5, satisfying the following condition: -4.82 < f5 / (R10 * CT5) < -2.04. Thereby, it helps the fifth lens to achieve an appropriate balance between lens formability and refractive power.

[0033] Preferably, 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 radius of curvature of the image side surface of the first lens is R2, and the radius of curvature of the image side surface of the second lens is R4, satisfying the following condition: 0.17 < (CT1 + CT2) / (R2 * R4) < 1.05. Thereby, a larger viewing angle is provided and better lens formability is achieved.

[0034] Preferably, the focal length of the third lens is f3, the focal length of the fifth lens is f5, and the focal length of the seventh lens is f7, satisfying the following condition: 0.3 < f3 / (f5 * f7) < 1.58. Thereby, the refractive power distribution of the lens group is more appropriate, which is beneficial to correcting the aberration of the lens group to improve the imaging quality of the lens group.

[0035] Preferably, the focal length of the second lens is f2, the focal length of the fourth lens is f4, and the focal length of the sixth lens is f6, satisfying the following condition: -1.46 < f2 / (f4*f6) < -0.58. Thus, the refractive power distribution of the lens group is more appropriate, which is beneficial to correcting the lens group aberration to improve the imaging quality of the lens group.

[0036] Preferably, the radius of curvature of the object side surface of the seventh lens is R13, the radius of curvature of the image side surface of the seventh lens is R14, and the focal length of the seventh lens is f7, satisfying the following condition: -2.27 < R13 / (R14*f7) < -0.18. Thus, the ability of the seventh lens to correct the lens group aberration and the ability to adjust the principal ray angle of the incident imaging surface are improved.

[0037] Preferably, the focal length of the seventh lens is f7, the thickness of the seventh lens on the optical axis is CT7, and the radius of curvature of the image side surface of the seventh lens is R14, satisfying the following condition: -2.19 < f7*CT7 / R14 < -0.62. Thus, it is beneficial for the seventh lens to achieve an appropriate balance between lens formability and refractive power.

[0038] Preferably, the focal length of the fourth lens is f4, the focal length of the fifth lens is f5, the radius of curvature of the object side surface of the fourth lens is R7, the radius of curvature of the image side surface of the fourth lens is R8, and the radius of curvature of the image side surface of the fifth lens is R10, satisfying the following condition: 0.34 < (R10*f5) / (R7*R8*f4) < 1.08. Thus, the configuration of the fourth lens and the fifth lens is more appropriate, improving the ghosting problem between the lenses.

[0039] Preferably, the radius of curvature of the object side surface of the first lens is R1, and the radius of curvature of the image side surface of the first lens is R2, satisfying the following condition: 0.26 < R2 / R1 < 0.56. Thus, the influence of manufacturing tolerances on the imaging quality is reduced and good formability is maintained.

[0040] For each of the above imaging lens groups or each camera module, the overall focal length of the imaging lens group is f, satisfying the following condition: 0.76 (mm) < f < 2.42 (mm).

[0041] For each of the above imaging lens groups or each camera module, the maximum viewing angle in the imaging lens group is FOV, satisfying the following condition: 143.92 (degrees) < FOV < 225.41 (degrees). More preferably, the following condition can also be satisfied: 161.91 (degrees) < FOV < 206.63 (degrees) BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1A It is a schematic diagram of the imaging lens group according to the first embodiment of the present invention.

[0043] Figure 1B From left to right, the images are curves showing the image plane curvature and distortion of the imaging lens group in the first embodiment, illustrating the state of image plane curvature and distortion in the visible and infrared light bands.

[0044] Figure 2A This is a schematic diagram of the imaging lens group according to the second embodiment of the present invention.

[0045] Figure 2B From left to right, the images are curves showing the bending and distortion of the image plane of the imaging lens group in the second embodiment, illustrating the bending and distortion of the image plane in the visible and infrared light bands.

[0046] Figure 3A This is a schematic diagram of the imaging lens group according to the third embodiment of the present invention.

[0047] Figure 3B From left to right, the images are curves showing the bending and distortion of the image plane of the imaging lens group in the third embodiment, illustrating the bending and distortion of the image plane in the visible and infrared light bands.

[0048] Figure 4A This is a schematic diagram of the imaging lens group according to the fourth embodiment of the present invention.

[0049] Figure 4B From left to right, the images are curves showing the image plane curvature and distortion of the imaging lens group in the fourth embodiment, illustrating the state of image plane curvature and distortion in the visible and infrared light bands.

[0050] Figure 5A This is a schematic diagram of the imaging lens group according to the fifth embodiment of the present invention.

[0051] Figure 5B From left to right, the images are curves showing the bending and distortion of the image plane of the imaging lens group in the fifth embodiment, illustrating the bending and distortion of the image plane in the visible and infrared light bands.

[0052] Figure 6A This is a schematic diagram of the imaging lens group according to the sixth embodiment of the present invention.

[0053] Figure 6B From left to right, the images are curves showing the bending and distortion of the image plane of the imaging lens group in the sixth embodiment, illustrating the bending and distortion of the image plane in the visible and infrared light bands.

[0054] Figure 7 This is a schematic diagram of the camera module according to the seventh embodiment of the present invention.

[0055] In the picture:

[0056] 100, 200, 300, 400, 500, 600: Aperture

[0057] 110, 210, 310, 410, 510, 610: First lens

[0058] 111, 211, 311, 411, 511, 611: Object-side surface

[0059] 112, 212, 312, 412, 512, 612: Image side surface

[0060] 120, 220, 320, 420, 520, 620: Second lens

[0061] 121, 221, 321, 421, 521, 621: Object-side surface

[0062] 122, 222, 322, 422, 522, 622: Image side surface

[0063] 130, 230, 330, 430, 530, 630: Third lens

[0064] 131, 231, 331, 431, 531, 631: Object-side surface

[0065] 132, 232, 332, 432, 532, 632: Image side surface

[0066] 140, 240, 340, 440, 540, 640: Fourth lens

[0067] 141, 241, 341, 441, 541, 641: Object-side surface

[0068] 142, 242, 342, 442, 542, 642: Image side surface

[0069] 150, 250, 350, 450, 550, 650: Fifth lens

[0070] 151, 251, 351, 451, 551, 651: Object-side surface

[0071] 152, 252, 352, 452, 552, 652: Image side surface

[0072] 160, 260, 360, 460, 560, 660: Sixth lens

[0073] 161, 261, 361, 461, 561, 661: Object-side surface

[0074] 162, 262, 362, 462, 562, 662: Image side surface

[0075] 170, 270, 370, 470, 570, 670: Seventh Lens

[0076] 171, 271, 371, 471, 571, 671: Object-side surface

[0077] 172, 272, 372, 472, 572, 672: Image side surface

[0078] 181, 281, 381, 481, 581, 681: Filter components

[0079] 183, 283, 383, 483, 583, 683: Imaging planes

[0080] 185, 285, 385, 485, 585, 685: Image sensors

[0081] 190, 290, 390, 490, 590, 690: Optical axis

[0082] 10: Camera Module

[0083] 11: Lens tube

[0084] 12: Imaging lens group

[0085] f: Overall focal length of the imaging lens group

[0086] Fno: Aperture value

[0087] FOV: Maximum field of view of the imaging lens group

[0088] EPD: Entrance pupil diameter of the imaging lens group

[0089] f1: Focal length of the first lens

[0090] f2: Focal length of the second lens

[0091] f4: Focal length of the fourth lens

[0092] f5: Focal length of the fifth lens

[0093] f6: Focal length of the sixth lens

[0094] f7: Focal length of the seventh lens

[0095] R1: Radius of curvature of the object-side surface of the first lens

[0096] R2: Radius of curvature of the image-side surface of the first lens

[0097] R4: Radius of curvature of the image-side surface of the second lens

[0098] R7: Radius of curvature of the object-side surface of the fourth lens

[0099] R8: Radius of curvature of the image-side surface of the fourth lens

[0100] R10: Radius of curvature of the image-side surface of the fifth lens

[0101] R13: Radius of curvature of the object-side surface of the seventh lens

[0102] R14: Radius of curvature of the image-side surface of the seventh lens

[0103] TL: The distance along the optical axis from the object-side surface of the first lens to the imaging plane.

[0104] CT1: Thickness of the first lens along the optical axis

[0105] CT2: Thickness of the second lens on the optical axis

[0106] CT5: Thickness of the fifth lens on the optical axis

[0107] CT7: Thickness of the seventh lens on the optical axis

[0108] IMH: Half the diagonal length of the effective pixel area of ​​an image sensor Detailed Implementation

[0109] The technical solution of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0110] <First Embodiment>

[0111] like Figure 1A and Figure 1B ,in Figure 1A This is a schematic diagram of the imaging lens group according to the first embodiment of the present invention. Figure 1B From left to right, the images show the image plane curvature and distortion aberration curves of the imaging lens group in the first embodiment, illustrating the state of image plane curvature and distortion aberration in the visible and infrared light bands. Figure 1AAs can be seen, the imaging lens group, along the optical axis 190 from the object side to the image side, sequentially includes a first lens 110, a second lens 120, a third lens 130, an aperture 100, a fourth lens 140, a fifth lens 150, a sixth lens 160, a seventh lens 170, a filter assembly 181, and an imaging surface 183, and the imaging lens group is used in conjunction with an image sensor 185. The imaging lens group contains seven refractive lenses, but this is not a limitation. The image sensor 185 is disposed on the imaging surface 183.

[0112] The first lens 110 has negative refractive power and is made of glass. Its object-side surface 111 is convex near the optical axis 190, and its image-side surface 112 is concave near the optical axis 190.

[0113] The second lens 120 has negative refractive power and is made of plastic. Its object-side surface 121 is convex near the optical axis 190, and its image-side surface 122 is concave near the optical axis 190. Both the object-side surface 121 and the image-side surface 122 are aspherical.

[0114] The third lens 130 has positive refractive power and is made of plastic. Its object-side surface 131 is convex near the optical axis 190, and its image-side surface 132 is convex near the optical axis 190. Both the object-side surface 131 and the image-side surface 132 are aspherical.

[0115] The fourth lens 140 has positive refractive power and is made of plastic. Its object-side surface 141 is convex near the optical axis 190, and its image-side surface 142 is convex near the optical axis 190. Both the object-side surface 141 and the image-side surface 142 are aspherical.

[0116] The fifth lens 150 has negative refractive power and is made of plastic. Its object-side surface 151 is concave near the optical axis 190, and its image-side surface 152 is concave near the optical axis 190. Both the object-side surface 151 and the image-side surface 152 are aspherical.

[0117] The sixth lens 160 has positive refractive power and is made of glass. Its object-side surface 161 is convex near the optical axis 190, and its image-side surface 162 is convex near the optical axis 190.

[0118] The seventh lens 170 has negative refractive power and is made of plastic. Its object-side surface 171 is convex near the optical axis 190, and its image-side surface 172 is concave near the optical axis 190. Both the object-side surface 171 and the image-side surface 172 are aspherical.

[0119] The filter assembly 181 is made of glass and is disposed between the seventh lens 170 and the imaging surface 183 without affecting the focal length of the imaging lens group. In this embodiment, an infrared cut filter removable (ICR) is selected, which is a set of automatically switchable filters. The switching of the filters determines whether the image sensor can receive infrared light. The timing of the filter switching depends on the intensity of visible light detected by the image sensor of the camera lens, but it is not limited to this. Filters that allow visible light to pass through, filters that allow infrared light to pass through, or filters that allow both visible and infrared light to pass through simultaneously can also be selected.

[0120] The equations for the aspherical surfaces of the above lenses are expressed as follows:

[0121]

[0122] Where z is the position value along the optical axis 190 at a height of h with the surface vertex as a reference; c is the curvature of the lens surface near the optical axis 190, and is the reciprocal of the radius of curvature (R) (c = 1 / R), R is the radius of curvature of the lens surface near the optical axis 190, h is the vertical distance of the lens surface from the optical axis 190, k is the conic constant, and Ai is the i-th order aspherical constant.

[0123] In the imaging lens group of the first embodiment, the overall focal length of the imaging lens group is f, the aperture value (f-number) of the imaging lens group is Fno, the maximum angle of view in the imaging lens group is FOV, and the entrance pupil diameter of the imaging lens group is EPD, with the following values: f = 2.01 (mm); Fno = 2.00; FOV = 187.85 (degrees); and EPD = 0.95 (mm).

[0124] In the imaging lens group of the first embodiment, the focal length of the first lens 110 is f1, the focal length of the sixth lens 160 is f6, and the following condition is satisfied: f1 / f6=-2.29.

[0125] In the imaging lens group of the first embodiment, the overall focal length of the imaging lens group is f, the focal length of the first lens 110 is f1, and the following condition is satisfied: f / f1=-0.28.

[0126] In the imaging lens group of the first embodiment, the focal length of the fifth lens 150 is f5, the focal length of the seventh lens 170 is f7, and the following condition is satisfied: f5 / f7=0.59.

[0127] In the imaging lens group of the first embodiment, the focal length of the fifth lens 150 is f5, the focal length of the sixth lens 160 is f6, and the focal length of the seventh lens 170 is f7, and the following condition is satisfied: f7 / (f5*f6)=0.54.

[0128] In the imaging lens group of the first embodiment, the focal length of the fifth lens 150 is f5, the radius of curvature of the image-side surface 152 of the fifth lens 150 is R10, the thickness of the fifth lens 150 on the optical axis 190 is CT5, and the following condition is satisfied: f5 / (R10*CT5)=-3.48.

[0129] In the imaging lens group of the first embodiment, the thickness of the first lens 110 on the optical axis 190 is CT1, the thickness of the second lens 120 on the optical axis 190 is CT2, the radius of curvature R2 of the image-side surface 112 of the first lens 110 and the radius of curvature R4 of the image-side surface 122 of the second lens 120 satisfy the following condition: (CT1+CT2) / (R2*R4)=0.22.

[0130] In the imaging lens group of the first embodiment, the focal length of the third lens 130 is f3, the focal length of the fifth lens 150 is f5, and the focal length of the seventh lens 170 is f7, and the following condition is satisfied: f3 / (f5*f7)=1.31.

[0131] In the imaging lens group of the first embodiment, the focal length of the second lens 120 is f2, the focal length of the fourth lens 140 is f4, and the focal length of the sixth lens 160 is f6, and the following condition is satisfied: f2 / (f4*f6)=-1.21.

[0132] In the imaging lens group of the first embodiment, the object-side surface 171 of the seventh lens 170 has a radius of curvature R13, the image-side surface 172 of the seventh lens 170 has a radius of curvature R14, the focal length of the seventh lens 170 is f7, and the following condition is satisfied: R13 / (R14*f7)=-1.90.

[0133] In the imaging lens group of the first embodiment, the focal length of the seventh lens 170 is f7, the thickness of the seventh lens 170 on the optical axis 190 is CT7, the radius of curvature R14 of the image-side surface 172 of the seventh lens 170 satisfies the following condition: f7*CT7 / R14=-1.37.

[0134] In the imaging lens group of the first embodiment, the focal length of the fourth lens 140 is f4, the focal length of the fifth lens 150 is f5, the radius of curvature of the object-side surface 141 of the fourth lens 140 is R7, the radius of curvature of the image-side surface 142 of the fourth lens 140 is R8, and the radius of curvature of the image-side surface 152 of the fifth lens 150 is R10, and the following condition is satisfied: (R10*f5) / (R7*R8*f4)=0.43.

[0135] In the imaging lens group of the first embodiment, the radius of curvature R1 of the object-side surface 111 of the first lens 110 and the radius of curvature R2 of the image-side surface 112 of the first lens 110 satisfy the following condition: R2 / R1=0.33.

[0136] In the imaging lens group of the first embodiment, the distance from the object-side surface 111 of the first lens 110 to the imaging surface 183 on the optical axis 190 is TL, the radius of curvature of the image-side surface 122 of the second lens 120 is R4, half the diagonal length of the effective pixel area of ​​the image sensor 185 is IMH, and the following condition is satisfied: TL*R4 / IMH=7.69.

[0137] Please refer to Table 1 and Table 2 below.

[0138]

[0139]

[0140] Table 1 shows... Figure 1AThe first embodiment provides detailed structural data, where the units for radius of curvature, thickness, gap, and focal length are mm. Surfaces 0-18 sequentially represent surfaces from the object side to the image side. Surface 0 represents the gap between the object and the object-side surface 111 of the first lens 110 on the optical axis 190. Surfaces 1, 3, 5, 8, 10, 12, 14, and 16 represent the thicknesses of the first lens 110, second lens 120, third lens 130, fourth lens 140, fifth lens 150, sixth lens 160, seventh lens 170, and filter assembly 181 on the optical axis 190, respectively. Surface 2 represents the gap between the first lens 110 and the second lens 120 on the optical axis 190, surface 4 represents the gap between the second lens 120 and the third lens 30 on the optical axis 190, and surface 6 represents the gap between the third lens 110 and the second lens 120 on the optical axis 190. The gap between lens 130 and aperture 100 on the optical axis 190; surface 7 is the gap between aperture 100 and the object-side surface 141 of the fourth lens 140 on the optical axis 190, and aperture 100 is further away from the object side than the object-side surface 141 of the fourth lens 140, so it is represented by a negative value; surface 9 is the gap between the fourth lens 140 and the fifth lens 150 on the optical axis 190; surface 11 is the gap between the fifth lens 150 and the sixth lens 160 on the optical axis 190; surface 13 is the gap between the sixth lens 150 and the seventh lens 170 on the optical axis 190; surface 15 is the gap between the seventh lens 170 and the filter assembly 181 on the optical axis 190; surface 17 is the gap between the filter assembly 181 and the imaging surface 183 on the optical axis 190.

[0141] Table 2 shows the aspherical data in the first embodiment, where k is the conic coefficient in the aspherical curve equation, and A2, A4, A6, A8, A10, A12, A14, and A16 are higher-order aspherical coefficients. Furthermore, the tables in the following embodiments are schematic diagrams and image plane curvature curves corresponding to each embodiment. The definitions of the data in the tables are the same as those in Tables 1 and 2 of the first embodiment, and will not be repeated here.

[0142] <Second Embodiment>

[0143] like Figure 2A and Figure 2B ,in Figure 2A This is a schematic diagram of the imaging lens assembly according to the second embodiment of the present invention. Figure 2B From left to right, the images show the image plane curvature and distortion aberration curves of the imaging lens group in the second embodiment, illustrating the state of image plane curvature and distortion aberration in the visible and infrared light bands. Figure 2AAs can be seen, the imaging lens group, along the optical axis 290 from the object side to the image side, sequentially includes a first lens 210, a second lens 220, a third lens 230, an aperture 200, a fourth lens 240, a fifth lens 250, a sixth lens 260, a seventh lens 270, a filter assembly 281, and an imaging surface 283, and the imaging lens group is used in conjunction with an image sensor 285. The imaging lens group contains seven refractive lenses, but this is not a limitation. The image sensor 285 is disposed on the imaging surface 283.

[0144] The first lens 220 has negative refractive power and is made of glass. Its object-side surface 211 is convex near the optical axis 290, and its image-side surface 212 is concave near the optical axis 290.

[0145] The second lens 220 has negative refractive power and is made of plastic. Its object-side surface 221 is convex near the optical axis 290, and its image-side surface 222 is concave near the optical axis 290. Both the object-side surface 221 and the image-side surface 222 are aspherical.

[0146] The third lens 230 has positive refractive power and is made of plastic. Its object-side surface 231 is convex near the optical axis 290, and its image-side surface 232 is convex near the optical axis 290. Both the object-side surface 231 and the image-side surface 232 are aspherical.

[0147] The fourth lens 240 has positive refractive power and is made of plastic. Its object-side surface 241 is convex near the optical axis 290, and its image-side surface 242 is convex near the optical axis 290. Both the object-side surface 241 and the image-side surface 242 are aspherical.

[0148] The fifth lens 250 has negative refractive power and is made of plastic. Its object-side surface 251 is concave near the optical axis 290, and its image-side surface 252 is concave near the optical axis 290. Both the object-side surface 251 and the image-side surface 252 are aspherical.

[0149] The sixth lens 260 has positive refractive power and is made of glass. Its object-side surface 261 is convex near the optical axis 290, and its image-side surface 262 is convex near the optical axis 290.

[0150] The seventh lens 270 has negative refractive power and is made of plastic. Its object-side surface 271 is convex near the optical axis 290, and its image-side surface 272 is concave near the optical axis 290. Both the object-side surface 271 and the image-side surface 272 are aspherical.

[0151] The filter assembly 281 is made of glass and is disposed between the seventh lens 270 and the imaging surface 283 without affecting the focal length of the imaging lens group. In this embodiment, an infrared cut filter removable (ICR) is selected, which is a set of automatically switchable filters. The switching of the filters determines whether the image sensor can receive infrared light. The timing of the filter switching depends on the intensity of visible light detected by the image sensor of the camera lens, but it is not limited to this. Filters that allow visible light to pass through, filters that allow infrared light to pass through, or filters that allow both visible and infrared light to pass through simultaneously can also be selected.

[0152] Please also refer to List 3 and Table 4.

[0153]

[0154]

[0155] In the second embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions of the parameters in the table below are the same as in the first embodiment, and will not be repeated here.

[0156] By referring to Tables 3 and 4, the following data can be calculated:

[0157]

[0158] <Third Embodiment>

[0159] like Figure 3A and Figure 3B ,in Figure 3A This is a schematic diagram of the imaging lens group according to the third embodiment of the present invention. Figure 3B From left to right, the images show the image plane curvature and distortion aberration curves of the imaging lens group in the third embodiment, illustrating the state of image plane curvature and distortion aberration in the visible and infrared light bands. Figure 3A As can be seen, the imaging lens group, along the optical axis 390 from the object side to the image side, sequentially includes a first lens 310, a second lens 320, a third lens 330, an aperture 300, a fourth lens 340, a fifth lens 350, a sixth lens 360, a seventh lens 370, a filter assembly 381, and an imaging surface 383, and the imaging lens group is used in conjunction with an image sensor 385. The imaging lens group contains seven refractive lenses, but this is not a limitation. The image sensor 385 is disposed on the imaging surface 383.

[0160] The first lens 320 has negative refractive power and is made of glass. Its object-side surface 311 is convex near the optical axis 390, and its image-side surface 312 is concave near the optical axis 390.

[0161] The second lens 320 has negative refractive power and is made of plastic. Its object-side surface 321 is convex near the optical axis 390, and its image-side surface 322 is concave near the optical axis 390. Both the object-side surface 321 and the image-side surface 322 are aspherical.

[0162] The third lens 330 has positive refractive power and is made of plastic. Its object-side surface 331 is concave near the optical axis 390, and its image-side surface 332 is convex near the optical axis 390. Both the object-side surface 331 and the image-side surface 332 are aspherical.

[0163] The fourth lens 340 has positive refractive power and is made of plastic. Its object-side surface 341 is convex near the optical axis 390, and its image-side surface 342 is convex near the optical axis 390. Both the object-side surface 341 and the image-side surface 342 are aspherical.

[0164] The fifth lens 350 has negative refractive power and is made of plastic. Its object-side surface 351 is concave near the optical axis 390, and its image-side surface 352 is concave near the optical axis 390. Both the object-side surface 351 and the image-side surface 352 are aspherical.

[0165] The sixth lens 360 has positive refractive power and is made of glass. Its object-side surface 361 is convex near the optical axis 390, and its image-side surface 362 is convex near the optical axis 390.

[0166] The seventh lens 370 has negative refractive power and is made of plastic. Its object-side surface 371 is convex near the optical axis 390, and its image-side surface 372 is concave near the optical axis 390. Both the object-side surface 371 and the image-side surface 372 are aspherical.

[0167] The filter assembly 381 is made of glass and is disposed between the seventh lens 370 and the imaging surface 383 without affecting the focal length of the imaging lens group. In this embodiment, an infrared cut filter removable (ICR) is selected, which is a set of automatically switchable filters. The switching of the filters determines whether the image sensor can receive infrared light. The timing of the filter switching depends on the intensity of visible light detected by the image sensor of the camera lens, but it is not limited to this. Filters that allow visible light to pass through, filters that allow infrared light to pass through, or filters that allow both visible and infrared light to pass through simultaneously can also be selected.

[0168] Please also refer to List 5 and Table 6 below.

[0169]

[0170]

[0171] In the third embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions of the parameters in the table below are the same as in the first embodiment, and will not be repeated here.

[0172] By combining Tables 5 and 6, the following data can be deduced:

[0173]

[0174] <Fourth Embodiment>

[0175] like Figure 4A and Figure 4B ,in Figure 4A This is a schematic diagram of the imaging lens group according to the fourth embodiment of the present invention. Figure 4B From left to right, the images show the image plane curvature and distortion aberration curves of the imaging lens group in the fourth embodiment, illustrating the state of image plane curvature and distortion aberration in the visible and infrared light bands. Figure 4A As can be seen, the imaging lens group, along the optical axis 490 from the object side to the image side, sequentially includes a first lens 410, a second lens 420, a third lens 430, an aperture 400, a fourth lens 440, a fifth lens 450, a sixth lens 460, a seventh lens 470, a filter assembly 481, and an imaging surface 483, and the imaging lens group is used in conjunction with an image sensor 485. The imaging lens group contains seven refractive lenses, but this is not a limitation. The image sensor 485 is disposed on the imaging surface 483.

[0176] The first lens 420 has negative refractive power and is made of glass. Its object-side surface 411 is convex near the optical axis 490, and its image-side surface 412 is concave near the optical axis 490.

[0177] The second lens 420 has negative refractive power and is made of plastic. Its object-side surface 421 is convex near the optical axis 490, and its image-side surface 422 is concave near the optical axis 490. Both the object-side surface 421 and the image-side surface 422 are aspherical.

[0178] The third lens 430 has positive refractive power and is made of plastic. Its object-side surface 431 is convex near the optical axis 490, and its image-side surface 432 is convex near the optical axis 490. Both the object-side surface 431 and the image-side surface 432 are aspherical.

[0179] The fourth lens 440 has positive refractive power and is made of plastic. Its object-side surface 441 is convex near the optical axis 490, and its image-side surface 442 is convex near the optical axis 490. Both the object-side surface 441 and the image-side surface 442 are aspherical.

[0180] The fifth lens 450 has negative refractive power and is made of plastic. Its object-side surface 451 is concave near the optical axis 490, and its image-side surface 452 is concave near the optical axis 490. Both the object-side surface 451 and the image-side surface 452 are aspherical.

[0181] The sixth lens 460 has positive refractive power and is made of glass. Its object-side surface 461 is convex near the optical axis 490, and its image-side surface 462 is convex near the optical axis 490.

[0182] The seventh lens 470 has negative refractive power and is made of plastic. Its object-side surface 471 is convex near the optical axis 490, and its image-side surface 472 is concave near the optical axis 490. Both the object-side surface 471 and the image-side surface 472 are aspherical.

[0183] The filter assembly 481 is made of glass and is disposed between the seventh lens 470 and the imaging surface 483 without affecting the focal length of the imaging lens group. In this embodiment, an infrared cut filter removable (ICR) is selected, which is a set of automatically switchable filters. The switching of the filters determines whether the image sensor can receive infrared light. The timing of the filter switching depends on the intensity of visible light detected by the image sensor of the camera lens, but it is not limited to this. Filters that allow visible light to pass through, filters that allow infrared light to pass through, or filters that allow both visible and infrared light to pass through simultaneously can also be selected.

[0184] Please also refer to List 7 and Table 8.

[0185]

[0186]

[0187] In the fourth embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions of the parameters in the table below are the same as in the first embodiment, and will not be repeated here.

[0188] By combining Table 7 and Table 8, the following data can be deduced:

[0189]

[0190]

[0191] <Fifth Embodiment>

[0192] like Figure 5A and Figure 5B ,in Figure 5AThis is a schematic diagram of the imaging lens group according to the fifth embodiment of the present invention. Figure 5B From left to right, the images show the image plane curvature and distortion aberration curves of the imaging lens group in the fifth embodiment, illustrating the state of image plane curvature and distortion aberration in the visible and infrared light bands. Figure 5A As can be seen, the imaging lens group, along the optical axis 590 from the object side to the image side, sequentially includes a first lens 510, a second lens 520, a third lens 530, an aperture 500, a fourth lens 540, a fifth lens 550, a sixth lens 560, a seventh lens 570, a filter assembly 581, and an imaging surface 583, and the imaging lens group is used in conjunction with an image sensor 585. The imaging lens group contains seven refractive lenses, but is not limited to this. The image sensor 585 is disposed on the imaging surface 583.

[0193] The first lens 520 has negative refractive power and is made of glass. Its object-side surface 511 is convex near the optical axis 590, and its image-side surface 512 is concave near the optical axis 590.

[0194] The second lens 520 has negative refractive power and is made of plastic. Its object-side surface 521 is convex near the optical axis 590, and its image-side surface 522 is concave near the optical axis 590. Both the object-side surface 521 and the image-side surface 522 are aspherical.

[0195] The third lens 530 has positive refractive power and is made of plastic. Its object-side surface 531 is convex near the optical axis 590, and its image-side surface 532 is convex near the optical axis 590. Both the object-side surface 531 and the image-side surface 532 are aspherical.

[0196] The fourth lens 540 has positive refractive power and is made of plastic. Its object-side surface 541 is convex near the optical axis 590, and its image-side surface 542 is convex near the optical axis 590. Both the object-side surface 541 and the image-side surface 542 are aspherical.

[0197] The fifth lens 550 has negative refractive power and is made of plastic. Its object-side surface 551 is concave near the optical axis 590, and its image-side surface 552 is concave near the optical axis 590. Both the object-side surface 551 and the image-side surface 552 are aspherical.

[0198] The sixth lens 560 has positive refractive power and is made of glass. Its object-side surface 561 is convex near the optical axis 590, and its image-side surface 562 is convex near the optical axis 590.

[0199] The seventh lens 570 has negative refractive power and is made of plastic. Its object-side surface 571 is convex near the optical axis 590, and its image-side surface 572 is concave near the optical axis 590. Both the object-side surface 571 and the image-side surface 572 are aspherical.

[0200] The filter assembly 581 is made of glass and is disposed between the seventh lens 570 and the imaging surface 583 without affecting the focal length of the imaging lens group. In this embodiment, an infrared cut filter removable (ICR) is selected, which is a set of automatically switchable filters. The switching of the filters determines whether the image sensor can receive infrared light. The timing of the filter switching depends on the intensity of visible light detected by the image sensor of the camera lens, but it is not limited to this. Filters that allow visible light to pass through, filters that allow infrared light to pass through, or filters that allow both visible and infrared light to pass through simultaneously can also be selected.

[0201] Please also refer to Table 9 and Table 10 below.

[0202]

[0203]

[0204] In the fifth embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions of the parameters in the table below are the same as in the first embodiment, and will not be repeated here.

[0205] By referring to Tables 9 and 10, the following data can be calculated:

[0206]

[0207] <Sixth Embodiment>

[0208] like Figure 6A and Figure 6B ,in Figure 6A This is a schematic diagram of the imaging lens group according to the sixth embodiment of the present invention. Figure 6B From left to right, the images show the image plane curvature and distortion aberration curves of the imaging lens group in the sixth embodiment, illustrating the state of image plane curvature and distortion aberration in the visible and infrared light bands. Figure 6AAs can be seen, the imaging lens group, along the optical axis 690 from the object side to the image side, sequentially includes a first lens 610, a second lens 620, a third lens 630, an aperture 600, a fourth lens 640, a fifth lens 650, a sixth lens 660, a seventh lens 670, a filter assembly 681, and an imaging surface 683, and the imaging lens group is used in conjunction with an image sensor 685. The imaging lens group contains seven lenses with refractive power, but this is not a limitation. The image sensor 685 is disposed on the imaging surface 683.

[0209] The first lens 620 has negative refractive power and is made of glass. Its object-side surface 611 is convex near the optical axis 690, and its image-side surface 612 is concave near the optical axis 690.

[0210] The second lens 620 has negative refractive power and is made of plastic. Its object-side surface 621 is convex near the optical axis 690, and its image-side surface 622 is concave near the optical axis 690. Both the object-side surface 621 and the image-side surface 622 are aspherical.

[0211] The third lens 630 has positive refractive power and is made of plastic. Its object-side surface 631 is convex near the optical axis 690, and its image-side surface 632 is convex near the optical axis 690. Both the object-side surface 631 and the image-side surface 632 are aspherical.

[0212] The fourth lens 640 has positive refractive power and is made of plastic. Its object-side surface 641 is convex near the optical axis 690, and its image-side surface 642 is convex near the optical axis 690. Both the object-side surface 641 and the image-side surface 642 are aspherical.

[0213] The fifth lens 650 has negative refractive power and is made of plastic. Its object-side surface 651 is concave near the optical axis 690, and its image-side surface 652 is concave near the optical axis 690. Both the object-side surface 651 and the image-side surface 652 are aspherical.

[0214] The sixth lens 660 has positive refractive power and is made of glass. Its object-side surface 661 is convex near the optical axis 690, and its image-side surface 662 is convex near the optical axis 690.

[0215] The seventh lens 670 has negative refractive power and is made of plastic. Its object-side surface 671 is convex near the optical axis 690, and its image-side surface 672 is concave near the optical axis 690. Both the object-side surface 671 and the image-side surface 672 are aspherical.

[0216] The filter assembly 681 is made of glass and is disposed between the seventh lens 670 and the imaging surface 683 without affecting the focal length of the imaging lens group. In this embodiment, an infrared cut filter removable (ICR) is selected, which is a set of automatically switchable filters. The switching of the filters determines whether the image sensor can receive infrared light. The timing of the filter switching depends on the intensity of visible light detected by the image sensor of the camera lens, but it is not limited to this. Filters that allow visible light to pass through, filters that allow infrared light to pass through, or filters that allow both visible and infrared light to pass through simultaneously can also be selected.

[0217] Please also refer to List 11 and Table 12 below.

[0218]

[0219]

[0220] In the sixth embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions of the parameters in the table below are the same as in the first embodiment, and will not be repeated here.

[0221] By combining Table 11 and Table 12, the following data can be deduced:

[0222]

[0223] <Seventh Embodiment>

[0224] like Figure 7 This is a camera module according to the seventh embodiment of the present invention. In this embodiment, the camera module is applied to a monitor camera lens, but is not limited thereto. The camera module 10 also includes a lens barrel 11, an imaging lens group 12, and an image sensor 185. The imaging lens group 12 is the imaging lens group of the first embodiment described above, but is not limited thereto; it may also be the imaging lens group of other embodiments described above. Figure 7 The lenses in the drawn imaging lens group show the peripheral areas that do not capture light, and are slightly different from the lenses in the first embodiment. The imaging lens group 12 is disposed inside the lens barrel 11. The image sensor 185 is disposed on the imaging surface 183 of the imaging lens group 12, and is an electronic photosensitive component (such as CMOS or CCD) with good brightness and low noise, so as to truly present the imaging quality of the imaging lens group.

[0225] The imaging lens assembly provided by this invention allows the lenses to be made of either plastic or glass. Using plastic effectively reduces production costs, while using glass increases the freedom of refractive power configuration. Furthermore, the object-side and image-side surfaces of the lenses in the imaging lens assembly can be aspherical. Aspherical surfaces can be easily manufactured into shapes other than spherical ones, providing more controllable variables to reduce aberrations and thus reduce the number of lenses used. Therefore, the overall length of the imaging lens assembly of this invention can be effectively reduced.

[0226] The imaging lens assembly provided by the present invention has a filter component made of glass, but it is not limited to this and may also be made of other materials with high dispersion coefficients.

[0227] In the imaging lens group provided by the present invention, taking a lens with refractive power as an example, if the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex near the optical axis; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave near the optical axis.

[0228] The imaging lens group provided by this invention can be applied to optical systems with mobile focusing as needed, and has the characteristics of excellent aberration correction and good imaging quality. It can be applied to various electronic imaging systems such as 3D (three-dimensional) image capture, digital cameras, mobile devices, digital drawing tablets or automotive photography.

[0229] In summary, the above embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An imaging lens assembly, characterized in that, From object side to image side, the following are included in sequence: The first lens has negative refractive power. The object-side surface of the first lens is convex near the optical axis, and the image-side surface of the first lens is concave near the optical axis. The second lens has negative refractive power. The object-side surface of the second lens is convex near the optical axis, and the image-side surface of the second lens is concave near the optical axis. At least one of the object-side surface and the image-side surface of the second lens is aspherical. The third lens has positive refractive power. The image-side surface of the third lens is convex near the optical axis, and at least one of the object-side surface and the image-side surface of the third lens is aspherical. aperture; The fourth lens has positive 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 convex near the optical axis. At least one of the object-side surface and the image-side surface of the fourth lens is aspherical. The fifth lens has negative refractive power. The object-side surface of the fifth lens is concave near the optical axis, and the image-side surface of the fifth lens is concave near the optical axis. Both the object-side surface and the image-side surface of the fifth lens are aspherical. The sixth lens has positive refractive power. The object-side surface of the sixth lens is convex near the optical axis, and the image-side surface of the sixth lens is convex near the optical axis. as well as The seventh lens has negative refractive power. The object-side surface of the seventh lens is convex near the optical axis, and the image-side surface of the seventh lens is concave near the optical axis. At least one of the object-side surface and the image-side surface of the seventh lens is aspherical. The imaging lens group comprises a total of seven refractive lenses. The focal length of the first lens is f1, the focal length of the sixth lens is f6, 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 radius of curvature of the image-side surface of the first lens is R2, and the radius of curvature of the image-side surface of the second lens is R4, satisfying the following conditions: -5.74 < f1 / f6 < -1.83 and 0.17 < (CT1+CT2) / (R2*R4) < 1.

05.

2. The imaging lens assembly as described in claim 1, characterized in that, The overall focal length of the imaging lens group is f, the focal length of the first lens is f1, and the following condition is satisfied: -0.34 < f / f1 < -0.

1.

3. The imaging lens assembly as described in claim 1, characterized in that, The fifth lens has a focal length of f5, and the seventh lens has a focal length of f7, satisfying the following condition: 0.11 < f5 / f7 < 0.

71.

4. The imaging lens assembly as described in claim 1, characterized in that, The fifth lens has a focal length of f5, the sixth lens has a focal length of f6, and the seventh lens has a focal length of f7, and satisfies the following condition: 0.44 <f7 / (f5*f6)<4.06。 5. The imaging lens assembly as described in claim 1, characterized in that, The fifth lens has a focal length of f5, a radius of curvature R10 on its image-side surface, and a thickness CT5 along its optical axis, and satisfies the following condition: -4.82 <f5 / (R10*CT5)<-2.04。 6. The imaging lens assembly as described in claim 1, characterized in that, The third lens has a focal length of f3, the fifth lens has a focal length of f5, and the seventh lens has a focal length of f7, and satisfies the following condition: 0.3 <f3 / (f5*f7)<1.58。 7. The imaging lens assembly as described in claim 1, characterized in that, The second lens has a focal length of f2, the fourth lens has a focal length of f4, and the sixth lens has a focal length of f6, satisfying the following condition: -1.46 <f2 / (f4*f6)<-0.58。 8. The imaging lens assembly as described in claim 1, characterized in that, The seventh lens has an object-side surface radius of curvature R13, an image-side surface radius of curvature R14, and a focal length of f7, and satisfies the following condition: -2.27 <R13 / (R14*f7)<-0.18。 9. The imaging lens assembly as described in claim 1, characterized in that, The seventh lens has a focal length of f7, a thickness of CT7 along its optical axis, and a radius of curvature R14 on its image-side surface, satisfying the following condition: -2.19 <f7*CT7 / R14<-0.62。 10. The imaging lens assembly as claimed in claim 1, characterized in that, The fourth lens has a focal length of f4, the fifth lens has a focal length of f5, the object-side surface of the fourth lens has a radius of curvature of R7, the image-side surface of the fourth lens has a radius of curvature of R8, and the image-side surface of the fifth lens has a radius of curvature of R10, and satisfies the following condition: 0.34 < (R10 * f5) / (R7 * R8 * f4) < 1.

08.

11. The imaging lens assembly as claimed in claim 1, characterized in that, The object-side surface radius of curvature R1 of the first lens and the image-side surface radius of curvature R2 of the first lens satisfy the following condition: 0.26 <R2 / R1<0.56。 12. A camera module, characterized in that, Include: Lens tube; The imaging lens group as described in any one of claims 1 to 11 is disposed within the lens barrel; and An image sensor is disposed on the imaging surface of the imaging lens group.

13. A camera module, characterized in that, Include: Lens tube; An imaging lens group is disposed within the lens barrel; and An image sensor is disposed on the imaging surface of the imaging lens group; The imaging lens group comprises, from the object side to the image side, the following in sequence: The first lens has negative refractive power. The object-side surface of the first lens is convex near the optical axis, and the image-side surface of the first lens is concave near the optical axis. The second lens has negative refractive power. The object-side surface of the second lens is convex near the optical axis, and the image-side surface of the second lens is concave near the optical axis. At least one of the object-side surface and the image-side surface of the second lens is aspherical. The third lens has positive refractive power. The image-side surface of the third lens is convex near the optical axis, and at least one of the object-side surface and the image-side surface of the third lens is aspherical. aperture; The fourth lens has positive 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 convex near the optical axis. At least one of the object-side surface and the image-side surface of the fourth lens is aspherical. The fifth lens has negative refractive power. The object-side surface of the fifth lens is concave near the optical axis, and the image-side surface of the fifth lens is concave near the optical axis. At least one of the object-side surface and the image-side surface of the fifth lens is aspherical. The sixth lens has positive refractive power. The object-side surface of the sixth lens is convex near the optical axis, and the image-side surface of the sixth lens is convex near the optical axis. as well as The seventh lens has negative refractive power. The object-side surface of the seventh lens is convex near the optical axis, and the image-side surface of the seventh lens is concave near the optical axis. At least one of the object-side surface and the image-side surface of the seventh lens is aspherical. The imaging lens group comprises seven refractive lenses. The distance from the object-side surface of the first lens to the imaging plane along the optical axis is TL. The radius of curvature of the image-side surface of the second lens is R4. Half the diagonal length of the effective pixel area of ​​the image sensor is IMH, and the following condition is satisfied: 2.7 <TL*R4 / IMH<9.23。 14. The camera module as described in claim 13, characterized in that, The focal length of the first lens is f1, and the focal length of the sixth lens is f6, satisfying the following condition: -5.74 < f1 / f6 < -1.

83.

15. The camera module as described in claim 13, characterized in that, The fifth lens has a focal length of f5, the sixth lens has a focal length of f6, and the seventh lens has a focal length of f7, and satisfies the following condition: 0.44 <f7 / (f5*f6)<4.06。 16. The camera module as described in claim 13, characterized in that, 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 radius of curvature of the image-side surface of the first lens is R2, the radius of curvature of the image-side surface of the second lens is R4, and the following condition is satisfied: 0.17<(CT1+CT2) / (R2*R4)<1.05.

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