Imaging lens group and camera module

Abstract

The present invention discloses an imaging lens group and an imaging module. The imaging lens group includes an aperture and sequentially includes, 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. Half of the maximum viewing angle of the imaging lens group is HFOV, the distance on the optical axis from the image side surface of the seventh lens to the imaging surface is BFL, 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 following conditions are satisfied: 45 < HFOV * BFL, and -1032.81 < R7 * R8 < -298.89.

Description

Technical Field

[0001] The present invention relates to an imaging lens group and a camera module, and particularly to an imaging lens group and a camera module applied to an electronic device. Background Art

[0002] With the rapid development of portable electronic devices, in order to facilitate carrying, miniaturized optical lenses applied therein have become indispensable, and due to the progress of semiconductor manufacturing technology, smaller and higher-pixel image sensors have been developed, enabling miniaturized optical lenses to enter the high-pixel field. Therefore, imaging quality has become an important research direction.

[0003] It is known that for a seven-piece miniaturized lens mounted on a portable electronic device, such as a mobile phone, a tablet computer, and other wearable electronic devices, when the aperture is large, it is prone to problems of manufacturing and assembly sensitivity, resulting in difficult mass production and increased costs; in addition, in order to reduce assembly tolerances, the quality of the peripheral imaging is sacrificed, making the periphery of the imaging blurred or even deformed. Summary of the Invention

[0004] The object of the present invention is to solve the sensitivity and imaging quality problems of the miniaturized lens with a large aperture in the above prior art. To achieve the above object, the present invention provides an imaging lens group, including an aperture, and sequentially including, from the object side to the image side: a first lens with positive refractive power; a second lens with negative refractive power, one of the object-side surface and the image-side surface of the second lens being an aspherical surface; a third lens with negative refractive power, one of the object-side surface and the image-side surface of the third lens being an aspherical surface; a fourth lens with positive refractive power, one of the object-side surface and the image-side surface of the fourth lens being an aspherical surface; a fifth lens with positive refractive power, one of the object-side surface and the image-side surface of the fifth lens being an aspherical surface; a sixth lens with positive refractive power, one of the object-side surface and the image-side surface of the sixth lens being an aspherical surface; and a seventh lens with negative refractive power, one of the object-side surface and the image-side surface of the seventh lens being an aspherical surface.

[0005] Wherein, half of the maximum viewing angle of the imaging lens group is HFOV, the distance from the image-side surface of the seventh lens to the imaging surface on the optical axis is BFL, the curvature radius of the object-side surface of the fourth lens is R7, the curvature radius of the image-side surface of the fourth lens is R8, and the following conditions are satisfied: 45 < HFOV * BFL, and -1032.81 < R7 * R8 < -298.89.

[0006] When the above imaging lens group satisfies 45 < HFOV * BFL and -1032.81 < R7 * R8 < -298.89, an appropriate configuration of a high-definition lens with a maximum viewing angle and an optical back focal length can be provided to avoid interference with the mechanism's appearance. By adjusting the surface shape of the fourth lens, the lens sensitivity can be reduced, the assembly tolerance can be minimized, and the quality of the lens product can be improved. Preferably, -946.74 < R7 * R8 < -336.25 can also be satisfied.

[0007] 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.

[0008] 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.

[0009] The object-side surface of the third lens is convex near the optical axis, and the image-side surface of the third lens is concave near the optical axis.

[0010] 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.

[0011] The object-side surface of the fifth lens is convex near the optical axis, and the image-side surface of the fifth lens is concave near the optical axis.

[0012] 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.

[0013] The object-side surface of the seventh lens is concave near the optical axis, and the image-side surface of the seventh lens is concave near the optical axis.

[0014] The total number of lenses with refractive power in the imaging lens group is seven.

[0015] The aperture is located on the object side of the first lens or between the first lens and the second lens.

[0016] The radius of curvature of the object-side surface of the fourth lens is R7, and the radius of curvature of the image-side surface of the fourth lens is R8, and the following condition is satisfied: -946.74 < R7 * R8 < -336.25. Thus, the surface shape of the fourth lens is appropriately adjusted to reduce the lens sensitivity, minimize the assembly tolerance, and improve the quality of the lens product.

[0017] The distance between the fourth lens and the fifth lens on the optical axis is T45, and the distance between the sixth lens and the seventh lens on the optical axis is T67, and the following condition is satisfied: 0.41 < T45 / T67 < 1.4. By effectively adjusting the lens spacing distribution, the aberration of the imaging lens group can be reduced.

[0018] The distance between the sixth lens and the seventh lens on the optical axis is T67, the radius of curvature of the object-side surface of the sixth lens is R11, the thickness of the sixth lens on the optical axis is CT6, and the following conditions are satisfied: 5.03 < T67 * R11 / CT6 < 13.55. By balancing the thickness and curvature relationship of the sixth lens, the lens sensitivity is reduced and the manufacturing quality is improved.

[0019] The shortest distance from the image-side surface of the seventh lens to the imaging surface is BFLM, the distance from the aperture to the imaging surface on the optical axis is SL, and the following conditions are satisfied: 0 < BFLM / SL < 0.18. This helps to achieve a balance between miniaturization and long back focus.

[0020] The radius of curvature of the image-side surface of the first lens is R2, the distance between the first lens and the second lens on the optical axis is T12, and the following conditions are satisfied: 169.89 < R2 / T12 < 517.65. By appropriately adjusting the distance between the first lens and the second lens, it helps to improve ghosting.

[0021] The overall focal length of the imaging lens group is f, 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 fifth lens is R10, and the following conditions are satisfied: 0.24 < f / (R6 + R10) < 0.53. Thereby, the field curvature of the imaging lens group can be effectively corrected and the imaging quality of the peripheral part of the image can be improved.

[0022] The radius of curvature of the object-side surface of the sixth lens is R11, the radius of curvature of the image-side surface of the fifth lens is R10, and the following conditions are satisfied: 0.76 < R11 / R10 < 2.63. This helps to reduce the distortion of the imaging lens group and improve the imaging quality.

[0023] The radius of curvature of the image-side surface of the fourth lens is R8, the radius of curvature of the image-side surface of the sixth lens is R12, and the following conditions are satisfied: 0.23 < R8 / R12 < 7.11. Thereby, the astigmatism of the imaging lens group is effectively improved and the imaging quality is improved.

[0024] The distance between the first lens and the second lens on the optical axis is T12, the distance between the second lens and the third lens on the optical axis is T23, and the following conditions are satisfied: 0.05 < T12 / T23 < 0.16. This makes the distance distribution of the lenses more appropriate to increase the viewing angle.

[0025] The thickness of the seventh lens on the optical axis is CT7, the radius of curvature of the image-side surface of the seventh lens is R14, the radius of curvature of the image-side surface of the fifth lens is R10, and the following conditions are satisfied: 0.21 < CT7 * R14 / R10 < 0.55. By adjusting the thickness and curvature of the seventh lens, it helps to increase the back focus.

[0026] 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: 0.15 < f6 / f4 < 0.95. Thus, the refractive power configuration is adjusted to achieve miniaturization effect.

[0027] The object-side surface curvature radius of the third lens is R5, the image-side surface curvature radius of the third lens is R6, the object-side surface curvature radius of the fifth lens is R9, and the image-side surface curvature radius of the fifth lens is R10, and the following condition is satisfied: 2.75 < (R5 * R6) / (R9 * R10) < 60.45. By balancing the curvature matching between the lenses, the lens sensitivity is effectively reduced and the manufacturing yield is improved.

[0028] The object-side surface curvature radius of the fourth lens is R7, the image-side surface curvature radius of the fourth lens is R8, the object-side surface curvature radius of the fifth lens is R9, and the image-side surface curvature radius of the fifth lens is R10, and the following condition is satisfied: -66.07 < (R7 * R8) / (R9 * R10) < -7.08. By adjusting the curvature distribution of the fourth lens and the fifth lens, it helps to improve the chromatic aberration of the imaging lens group to achieve high image quality.

[0029] In addition, the present invention further provides an imaging module, including: 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.

[0030] Among them, the imaging lens group includes an aperture and sequentially includes, from the object side to the image side: a first lens having a positive refractive power; a second lens having a negative refractive power, and one of the object-side surface and the image-side surface of the second lens is an aspherical surface; a third lens having a negative refractive power, and one of the object-side surface and the image-side surface of the third lens is an aspherical surface; a fourth lens having a positive refractive power, and one of the object-side surface and the image-side surface of the fourth lens is an aspherical surface; a fifth lens having a positive refractive power, and one of the object-side surface and the image-side surface of the fifth lens is an aspherical surface; a sixth lens having a positive refractive power, and one of the object-side surface and the image-side surface of the sixth lens is an aspherical surface; and a seventh lens having a negative refractive power, and one of the object-side surface and the image-side surface of the seventh lens is an aspherical surface.

[0031] Among them, half of the maximum viewing angle of the imaging lens group is HFOV, the distance on the optical axis from the image-side surface of the seventh lens to the imaging surface is BFL, the object-side surface curvature radius of the fourth lens is R7, and the image-side surface curvature radius of the fourth lens is R8, and the following conditions are satisfied: 45 < HFOV * BFL and -1032.81 < R7 * R8 < -298.89.

[0032] When the above imaging lens group satisfies 45 < HFOV * BFL and -1032.81 < R7 * R8 < -298.89, an appropriate configuration of a high-definition lens with a maximum viewing angle and an optical back focal length can be provided to avoid interference with the mechanism's appearance. By adjusting the surface shape of the fourth lens, the lens sensitivity can be reduced, the assembly tolerance can be minimized, and the quality of the lens product can be improved. Preferably, -946.74 < R7 * R8 < -336.25 can also be satisfied.

[0033] 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.

[0034] 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.

[0035] The object-side surface of the third lens is convex near the optical axis, and the image-side surface of the third lens is concave near the optical axis.

[0036] 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.

[0037] The object-side surface of the fifth lens is convex near the optical axis, and the image-side surface of the fifth lens is concave near the optical axis.

[0038] 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.

[0039] The object-side surface of the seventh lens is concave near the optical axis, and the image-side surface of the seventh lens is concave near the optical axis.

[0040] The total number of lenses with refractive power in the imaging lens group is seven.

[0041] The aperture is located on the object side of the first lens or between the first lens and the second lens.

[0042] The radius of curvature of the object-side surface of the fourth lens in the imaging lens group is R7, and the radius of curvature of the image-side surface of the fourth lens is R8, and the following conditions are satisfied: -'946.74 < R7 * R8 < -336.25. Thereby, the surface shape of the fourth lens is appropriately adjusted to reduce the lens sensitivity, minimize the assembly tolerance, and improve the quality of the lens product.

[0043] In the imaging lens group, the distance between the fourth lens and the fifth lens on the optical axis is T45, and the distance between the sixth lens and the seventh lens on the optical axis is T67, and the following conditions are satisfied: 0.41 < T45 / T67 < 1.4. By effectively adjusting the lens spacing distribution, the aberration of the imaging lens group can be reduced.

[0044] Among the imaging lens group, the distance between the sixth lens and the seventh lens on the optical axis is T67, the radius of curvature of the object-side surface of the sixth lens is R11, and the thickness of the sixth lens on the optical axis is CT6, and the following conditions are satisfied:

[0045] 5.03 < T67 * R11 / CT6 < 13.55. By balancing the relationship between the thickness and curvature of the sixth lens, the lens sensitivity is reduced and the manufacturing quality is improved.

[0046] Among the imaging lens group, the shortest distance from the image-side surface of the seventh lens to the imaging surface is BFLM, and the distance from the aperture to the imaging surface on the optical axis is SL, and the following conditions are satisfied: 0 < BFLM / SL < 0.18. This helps to achieve a balance between miniaturization and long back focus.

[0047] [[ID=?]]Among the imaging lens group, the radius of curvature of the image-side surface of the first lens is R2, and the distance between the first lens and the second lens on the optical axis is T12, and the following conditions are satisfied: 169.89 < R2 / T12 < 517.65. By appropriately adjusting the distance between the first lens and the second lens, it helps to improve ghost image generation.

[0048] Among the imaging lens group, the overall focal length of the imaging lens group is f, the radius of curvature of the image-side surface of the third lens is R6, and the radius of curvature of the image-side surface of the fifth lens is R10, and the following conditions are satisfied: 0.24 < f / (R6 + R10) < 0.53. Thereby, the field curvature of the imaging lens group can be effectively corrected and the imaging quality of the peripheral part of the picture can be improved.

[0049] Among the imaging lens group, the radius of curvature of the object-side surface of the sixth lens is R11, and the radius of curvature of the image-side surface of the fifth lens is R10, and the following conditions are satisfied: 0.76 < R11 / R10 < 2.63. Thereby, it helps to reduce the distortion of the imaging lens group and improve the imaging quality.

[0050] Among the imaging lens group, 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 sixth lens is R12, and the following conditions are satisfied: 0.23 < R8 / R12 < 7.11. Thereby, the astigmatism of the imaging lens group is effectively improved and the imaging quality is improved.

[0051] Among the imaging lens group, the distance between the first lens and the second lens on the optical axis is T12, and the distance between the second lens and the third lens on the optical axis is T23, and the following conditions are satisfied: 0.05 < T12 / T23 < 0.16. Thereby, the spacing distribution of the lenses is more appropriate to increase the viewing angle.

[0052] Note: There seems to be a numbering issue in the original text where the ID "9" is followed by "?". It's assumed this is a typo and the correct ID should be "9" in the translation as well. If this is not a typo, please clarify.Among the imaging lens group, the thickness of the seventh lens on the optical axis is CT7, the image-side surface curvature radius of the seventh lens is R14, the image-side surface curvature radius of the fifth lens is R10, and the following conditions are satisfied: 0.21 < CT7 * R14 / R10 < 0.55. By adjusting the thickness and curvature of the seventh lens, it helps to increase the back focal length.

[0053] Among the imaging lens group, the focal length of the fourth lens is f4, the focal length of the sixth lens is f6, and the following conditions are satisfied: 0.15 < f6 / f4 < 0.95. Thereby, the configuration of the refractive power is adjusted to achieve the miniaturization effect.

[0054] Among the imaging lens group, the object-side surface curvature radius of the third lens is R5, the image-side surface curvature radius of the third lens is R6, the object-side surface curvature radius of the fifth lens is R9, the image-side surface curvature radius of the fifth lens is R10, and the following conditions are satisfied: 2.75 < (R5 * R6) / (R9 * R10) < 60.45. By balancing the curvature matching between the lenses, it effectively reduces the lens sensitivity and improves the manufacturing yield.

[0055] Among the imaging lens group, the object-side surface curvature radius of the fourth lens is R7, the image-side surface curvature radius of the fourth lens is R8, the object-side surface curvature radius of the fifth lens is R9, the image-side surface curvature radius of the fifth lens is R10, and the following conditions are satisfied: -66.07 < (R7 * R8) / (R9 * R10) < -7.08. By adjusting the curvature distribution of the fourth lens and the fifth lens, it helps to improve the chromatic aberration of the imaging lens group to achieve high image quality.

[0056] With the imaging lens group and the camera module of the present invention, a high-image-quality lens with high resolution and a large viewing angle can be provided. Another effect of the present invention is to increase the back focal length to achieve a more sufficient mechanical appearance space, thereby improving the product quality. BRIEF DESCRIPTION OF THE DRAWINGS [[ID= (15)]] [[ID= (16)]]

[0057] [[ID= (17)]] Figure 1A [[ID= (18)]]It is a schematic diagram of the imaging lens group according to the first embodiment of the present invention. [[ID= (19)]] [[ID= (20)]]

[0058] [[ID= (21)]] Figure 1B [[ID= (22)]]From left to right are the field curvature and distortion curves of the imaging lens group according to the first embodiment. [[ID= (23)]]<0000 | 122>[[ID= (24)]]

[0059] [[ID= ( | 25)]] Figure 2A [[ID= (26)]]It is a schematic diagram of the imaging lens group according to the second embodiment of the present invention. [[ID= (27)]] [[ID= (28)]]

[0060] [[ID= (29)]] Figure 2B [[ID= (30)]]From left to right are the field curvature and distortion curves of the imaging lens group according to the second embodiment. [[ID= (31)]] [[ID= (32)]]

[0061] Figure 3A FIG. 4 is a schematic diagram of an imaging lens assembly according to a third embodiment of the present invention.

[0062] Figure 3B From left to right are the field curvature and distortion curves of the imaging lens assembly of the third embodiment.

[0063] Figure 4A FIG. 4 is a schematic diagram of an imaging lens assembly according to a fourth embodiment of the present invention.

[0064] Figure 4B From left to right are the field curvature and distortion curves of the imaging lens assembly of the fourth embodiment.

[0065] Figure 5A FIG. 4 is a schematic diagram of an imaging lens assembly according to a fifth embodiment of the present invention.

[0066] Figure 5B From left to right are the field curvature and distortion curves of the imaging lens assembly of the fifth embodiment.

[0067] Figure 6A FIG. 4 is a schematic diagram of an imaging lens assembly according to a sixth embodiment of the present invention.

[0068] Figure 6B From left to right are the field curvature and distortion curves of the imaging lens assembly of the sixth embodiment.

[0069] Figure 7A FIG. 4 is a schematic diagram of an imaging lens assembly according to a seventh embodiment of the present invention.

[0070] Figure 7B From left to right are the field curvature and distortion curves of the imaging lens assembly of the seventh embodiment.

[0071] Figure 8A FIG. 4 is a schematic diagram of an imaging lens assembly according to an eighth embodiment of the present invention.

[0072] Figure 8B From left to right are the field curvature and distortion curves of the imaging lens assembly of the eighth embodiment.

[0073] Figure 9 Schematic diagram of a camera module according to a ninth embodiment of the present invention.

[0074] Description of symbols in the accompanying drawings:

[0075] STO: aperture;

[0076] 110, 210, 310, 410, 510, 610, 710, 810, 910: first lens;

[0077] 111, 211, 311, 411, 511, 611, 711, 811: object side surface;

[0078] 112, 212, 312, 412, 512, 612, 712, 812: image side surface;

[0079] 120, 220, 320, 420, 520, 620, 720, 820, 920: second lens;

[0080] 121, 221, 321, 421, 521, 621, 721, 821: object side surface;

[0081] 122, 222, 322, 422, 522, 622, 722, 822: image side surface;

[0082] 130, 230, 330, 430, 530, 630, 730, 830, 930: third lens;

[0083] 131, 231, 331, 431, 531, 631, 731, 831: object side surface;

[0084] 132, 232, 332, 432, 532, 632, 732, 832: image side surface;

[0085] 140, 240, 340, 440, 540, 640, 740, 840, 940: fourth lens;

[0086] 141, 241, 341, 441, 541, 641, 741, 841: object side surface;

[0087] 142, 242, 342, 442, 542, 642, 742, 842: image side surface;

[0088] 150, 250, 350, 450, 550, 650, 750, 850, 950: fifth lens;

[0089] 151, 251, 351, 451, 551, 651, 751, 851: object side surface;

[0090] 152, 252, 352, 452, 552, 652, 752, 852: image side surface;

[0091] 160, 260, 360, 460, 560, 660, 760, 860, 960: sixth lens;

[0092] 161, 261, 361, 461, 561, 661, 761, 861: object side surface;

[0093] 162, 262, 362, 462, 562, 662, 762, 862: image side surface;

[0094] 170, 270, 370, 470, 570, 670, 770, 870, 970: seventh lens;

[0095] 171, 271, 371, 471, 571, 671, 771, 871: object side surface;

[0096] 172, 272, 372, 472, 572, 672, 772, 872: image side surface;

[0097] 180, 280, 380, 480, 580, 680, 780, 880, 980: infrared filter; 190, 290, 390, 490, 590, 690, 790, 890, 990: imaging surface;

[0098] 100, 200, 300, 400, 500, 600, 700, 800, 900: optical axis;

[0099] 1000: lens barrel;

[0100] 2000: Image sensor;

[0101] f: overall focal length of the imaging lens group;

[0102] Fno: aperture value of the imaging lens group;

[0103] FOV: the maximum viewing angle of the imaging lens group;

[0104] HFOV: half of the maximum viewing angle of the imaging lens group;

[0105] BFL: the distance from the image-side surface of the seventh lens element to the imaging plane on the optical axis;

[0106] f4: focal length of the fourth lens;

[0107] f6: focal length of the sixth lens;

[0108] R2: radius of curvature of the object side surface of the first lens;

[0109] R5: the radius of curvature of the object-side surface of the third lens;

[0110] R6: radius of curvature of the image-side surface of the third lens;

[0111] R7: radius of curvature of the object-side surface of the fourth lens;

[0112] R8: radius of curvature of the image-side surface of the fourth lens;

[0113] R9: radius of curvature of the object-side surface of the fifth lens;

[0114] R10: radius of curvature of the image-side surface of the fifth lens;

[0115] R11: radius of curvature of the object-side surface of the sixth lens;

[0116] R12: radius of curvature of the image-side surface of the sixth lens;

[0117] R14: radius of curvature of the image-side surface of the seventh lens;

[0118] T12: The distance between the first lens and the second lens on the optical axis;

[0119] T23: The distance between the second lens and the third lens on the optical axis;

[0120] T45: The distance between the fourth lens and the fifth lens on the optical axis;

[0121] T67: The distance between the sixth lens element and the seventh lens element on the optical axis;

[0122] CT6: thickness of the sixth lens element on the optical axis;

[0123] CT7: thickness of the seventh lens element on the optical axis;

[0124] BFLM: the shortest distance from the image-side surface of the seventh lens to the imaging plane;

[0125] SL: The distance from the aperture to the image plane on the optical axis. DETAILED DESCRIPTION

[0126] In order to enable those with ordinary skill in the art to understand the contents of the present invention and implement the contents of the present invention accordingly, the following is an illustration of appropriate embodiments. Equivalent substitutions and modifications based on the contents of the present invention are included in the scope of the rights of the present invention. In addition, it is stated that the illustrations attached to the present invention are not depicted according to actual dimensions. Although the present invention provides embodiments of specific parameters, it should be understood that the parameters do not need to be exactly equal to the corresponding values. Within an acceptable error range, they are approximate to their corresponding parameters. The following embodiments will further explain the technical content of the present invention in detail, but the disclosed content is not intended to limit the scope of the rights of the present invention.

[0127] <First embodiment>

[0128] Please refer to Figure 1A and Figure 1B ,in, Figure 1A is a schematic diagram of an imaging lens assembly according to a first embodiment of the present invention, Figure 1BFrom left to right are the field curvature and distortion curves of the imaging lens assembly of the first embodiment. Figure 1A As can be seen, the imaging lens assembly includes an aperture STO and, from the object side to the image side, includes: a first lens 110, a second lens 120, a third lens 130, a fourth lens 140, a fifth lens 150, a sixth lens 160, a seventh lens 170, an infrared cutoff filter 180, and an imaging surface 190. The imaging lens assembly comprises seven lenses with refractive power, but this is not limited to one embodiment.

[0129] The first lens 110 has positive refractive power and is made of plastic. Its object-side surface 111 is convex near the optical axis 100 , and its image-side surface 112 is concave near the optical axis 100 . Both the object-side surface 111 and the image-side surface 112 are aspherical.

[0130] The second lens 120 has negative refractive power and is made of plastic. Its object-side surface 121 is convex near the optical axis 100 , and its image-side surface 122 is concave near the optical axis 100 . Both the object-side surface 121 and the image-side surface 122 are aspherical.

[0131] The third lens 130 has negative refractive power and is made of plastic. Its object-side surface 131 is convex near the optical axis 100 , and its image-side surface 132 is concave near the optical axis 100 . Both the object-side surface 131 and the image-side surface 132 are aspherical.

[0132] The fourth lens 140 has positive refractive power and is made of plastic. Its object-side surface 141 is convex near the optical axis 100 , and its image-side surface 142 is convex near the optical axis 100 . Both the object-side surface 141 and the image-side surface 142 are aspherical.

[0133] The fifth lens element 150 has positive refractive power and is made of plastic. Its object-side surface 151 is convex near the optical axis 100 , and its image-side surface 152 is concave near the optical axis 100 . Both the object-side surface 151 and the image-side surface 152 are aspherical.

[0134] The sixth lens element 160 has positive refractive power and is made of plastic. Its object-side surface 161 is convex near the optical axis 100 , and its image-side surface 162 is convex near the optical axis 100 . Both the object-side surface 161 and the image-side surface 162 are aspherical.

[0135] The seventh lens element 170 has negative refractive power and is made of plastic. Its object-side surface 171 is concave near the optical axis 100 , and its image-side surface 172 is concave near the optical axis 100 . Both the object-side surface 171 and the image-side surface 172 are aspherical.

[0136] The infrared cut filter 180 is made of glass and is disposed between the seventh lens 170 and the imaging surface 190 without affecting the focal length of the imaging lens group. It is understood that the infrared cut filter 180 can also be formed on the lens surface, and the infrared cut filter 180 can also be made of other materials.

[0137] The curve equations of the aspheric surfaces of the above lenses are expressed as follows:

[0138]

[0139] Wherein, z is the position value at a height h along the optical axis 100 with reference to the surface vertex; c is the curvature of the lens surface near the optical axis 100 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 100, h is the vertical distance of the lens surface from the optical axis 100, k is the conic constant, and Ai is the i-th order aspheric coefficient.

[0140] In 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 Fn o, and the maximum viewing angle (viewing angle 2ω) of the imaging lens group is FOV, whose values ​​are as follows: f = 5.51 (mm); Fno = 1.62; and FOV = 86.8 (degrees).

[0141] In the imaging lens assembly of the first embodiment, half of the maximum viewing angle of the imaging lens assembly is HFOV, the distance from the image-side surface of the seventh lens element 170 to the imaging plane on the optical axis 100 is BFL, the object-side surface 141 of the fourth lens element 140 has a curvature radius of R7, and the image-side surface 142 of the fourth lens element 140 has a curvature radius of R8, and the following conditions are satisfied: HFOV*BFL=52.03 and R7*R8=-837.59.

[0142] In the imaging lens assembly of the first embodiment, the distance between the fourth lens 140 and the fifth lens 150 on the optical axis 100 is T45, and the distance between the sixth lens 160 and the seventh lens 170 on the optical axis 100 is T67, and the following condition is satisfied: T45 / T67=0.51.

[0143] In the imaging lens assembly of the first embodiment, the distance between the sixth lens 160 and the seventh lens 170 on the optical axis 100 is T67, the radius of curvature of the object-side surface 161 of the sixth lens 160 is R11, and the thickness of the sixth lens 160 on the optical axis 100 is CT6, and the following condition is satisfied: T67*R11 / CT6=6.66.

[0144] In the imaging lens assembly of the first embodiment, the shortest distance from the image-side surface 172 of the seventh lens 170 to the imaging plane 190 is BFLM, the distance from the aperture STO to the imaging plane 190 on the optical axis 100 is SL, and the following condition is satisfied: BFLM / SL=0.15.

[0145] In the imaging lens assembly of the first embodiment, the curvature radius of the image-side surface 112 of the first lens 110 is R2, and the distance between the first lens 110 and the second lens 120 on the optical axis 100 is T12, and the following condition is satisfied: R2 / T12=310.34.

[0146] In the imaging lens group of the first embodiment, the overall focal length of the imaging lens group is f, the curvature radius of the image-side surface 132 of the third lens 130 is R6, the curvature radius of the image-side surface 152 of the fifth lens 150 is R10, and the following condition is satisfied: f / (R6+R10)=0.29.

[0147] In the imaging lens assembly of the first embodiment, the object-side surface 161 of the sixth lens 160 has a curvature radius of R11, and the image-side surface 152 of the fifth lens 150 has a curvature radius of R10, and the following condition is satisfied: R11 / R10=1.61.

[0148] In the imaging lens assembly of the first embodiment, the curvature radius of the image-side surface 142 of the fourth lens 140 is R8, and the curvature radius of the image-side surface 162 of the sixth lens 160 is R12, and the following condition is satisfied: R8 / R12=5.92.

[0149] In the imaging lens assembly of the first embodiment, the distance between the first lens 110 and the second lens 120 on the optical axis 100 is T12, and the distance between the second lens 120 and the third lens 130 on the optical axis 100 is T23, and the following condition is satisfied: T12 / T23=0.09.

[0150] In the imaging lens assembly of the first embodiment, the thickness of the seventh lens 170 on the optical axis 100 is CT7, the curvature radius of the image-side surface 172 of the seventh lens 170 is R14, and the curvature radius of the image-side surface 152 of the fifth lens 150 is R10, and the following condition is satisfied: CT7*R14 / R10=0.38.

[0151] In the imaging lens assembly of the first embodiment, the focal length of the fourth lens 140 is f4, the focal length of the sixth lens 160 is f6, and the following condition is satisfied: f6 / f4=0.18.

[0152] In the imaging lens group of the first embodiment, the object-side surface 131 of the third lens 130 has a curvature radius of R5, the image-side surface 132 of the third lens 130 has a curvature radius of R6, the object-side surface 151 of the fifth lens 150 has a curvature radius of R9, and the image-side surface 152 of the fifth lens 150 has a curvature radius of R10, and the following condition is satisfied: (R5*R6) / (R9*R10)=50.37.

[0153] In the imaging lens group of the first embodiment, the object-side surface 141 of the fourth lens 140 has a curvature radius of R7, the image-side surface 142 of the fourth lens 140 has a curvature radius of R8, the object-side surface 151 of the fifth lens 150 has a curvature radius of R9, and the image-side surface 152 of the fifth lens 150 has a curvature radius of R10, and the following condition is satisfied: (R7*R8) / (R9*R10)=-55.06.

[0154] Please refer to Table 1 and Table 2 below.

[0155]

[0156]

[0157]

[0158]

[0159] Table 1 is Figure 1ADetailed structural data of the first embodiment, wherein the units of curvature radius, thickness, gap and focal length are in mm, and surfaces 0-18 represent surfaces from the object side to the image side in sequence, wherein surface 0 is the gap between the object and the aperture STO on the optical axis 100; surface 1 is the gap between the aperture STO and the object side surface 111 of the first lens 110 on the optical axis 100, and the object side surface 111 of the first lens 110 is closer to the object side than the aperture STO, so it is represented by a negative value. Conversely, if the aperture STO is closer to the object side than the object side surface 111 of the first lens 110, it is represented by a positive value; surfaces 2, 4, 6, 8, 10, 12, 14, and 16 are the first lens 110, the second lens 120, the third lens 130, the fourth lens 140, the fifth lens 150, the sixth lens 160, the seventh lens 170, the red lens 180, the infrared lens 181, the infrared lens 182, the infrared lens 183, the infrared lens 184, the infrared lens 185, the infrared lens 186, the infrared lens 187, the infrared lens 188, the infrared lens 189, the infrared lens 190, the infrared lens 191, the infrared lens 192, the infrared lens 193, the infrared lens 194, the infrared lens 195, the infrared lens 196, the infrared lens 197, the infrared lens 198, the infrared lens 199, the infrared lens 200, the infrared lens 201, the infrared lens 202, the infrared lens 203, the infrared lens 204, the infrared lens 205, the infrared lens 206, the infrared lens 207, the infrared lens 198 the thickness of the infrared cutoff filter 180 on the optical axis 100; surfaces 3, 5, 7, 9, 11, 13, 15, and 17 are respectively the gap on the optical axis 100 between the first lens 110 and the second lens 120, the gap on the optical axis 100 between the second lens 120 and the third lens 130, the gap on the optical axis 100 between the third lens 130 and the fourth lens 140, the gap on the optical axis 100 between the fourth lens 140 and the fifth lens 150, the gap on the optical axis 100 between the fifth lens 150 and the sixth lens 160, the gap on the optical axis 100 between the sixth lens 160 and the seventh lens 170, the gap on the optical axis 100 between the seventh lens 170 and the infrared cutoff filter 180, and the gap on the optical axis 100 between the infrared cutoff filter 180 and the imaging plane 190.

[0160] Table 2 shows the aspheric surface data for the first embodiment, where k represents the conic coefficient in the aspheric curve equation, and A2, A4, A6, A8, A10, A12, A14, A16, A18, and A20 represent higher-order aspheric surface coefficients. Furthermore, the following tables of the embodiments correspond to the schematic diagrams and aberration curves of 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 are not further detailed.

[0161] <Second embodiment>

[0162] Please refer to Figure 2A and Figure 2B ,in, Figure 2A is a schematic diagram of an imaging lens assembly according to a second embodiment of the present invention, Figure 2B From left to right are the field curvature and distortion curves of the imaging lens assembly of the second embodiment. Figure 2AAs can be seen, the imaging lens assembly includes an aperture STO and, from the object side to the image side, includes: a first lens 210, a second lens 220, a third lens 230, a fourth lens 240, a fifth lens 250, a sixth lens 260, a seventh lens 270, an infrared cutoff filter 280, and an imaging surface 290. The imaging lens assembly comprises seven lenses with refractive power, but this is not limited to one embodiment.

[0163] The first lens 210 has positive refractive power and is made of plastic. Its object-side surface 211 is convex near the optical axis 200 , and its image-side surface 212 is concave near the optical axis 200 . Both the object-side surface 211 and the image-side surface 212 are aspherical.

[0164] The second lens 220 has negative refractive power and is made of plastic. Its object-side surface 221 is convex near the optical axis 200 , and its image-side surface 222 is concave near the optical axis 200 . Both the object-side surface 221 and the image-side surface 222 are aspherical.

[0165] The third lens 230 has negative refractive power and is made of plastic. Its object-side surface 231 is convex near the optical axis 200 , and its image-side surface 232 is concave near the optical axis 200 . Both the object-side surface 231 and the image-side surface 232 are aspherical.

[0166] The fourth lens 240 has positive refractive power and is made of plastic. Its object-side surface 241 is convex near the optical axis 200 , and its image-side surface 242 is convex near the optical axis 200 . Both the object-side surface 241 and the image-side surface 242 are aspherical.

[0167] The fifth lens element 250 has positive refractive power and is made of plastic. Its object-side surface 251 is convex near the optical axis 200 , and its image-side surface 252 is concave near the optical axis 200 . Both the object-side surface 251 and the image-side surface 252 are aspherical.

[0168] The sixth lens 260 has positive refractive power and is made of plastic. Its object-side surface 261 is convex near the optical axis 200 , and its image-side surface 262 is convex near the optical axis 200 . Both the object-side surface 261 and the image-side surface 262 are aspherical.

[0169] The seventh lens element 270 has negative refractive power and is made of plastic. Its object-side surface 271 is concave near the optical axis 200 , and its image-side surface 272 is concave near the optical axis 200 . Both the object-side surface 271 and the image-side surface 272 are aspherical.

[0170] The infrared cut filter 280 is made of glass and is disposed between the seventh lens 270 and the imaging surface 290 without affecting the focal length of the imaging lens group. It is understood that the infrared cut filter 280 can also be formed on the lens surface, and the infrared cut filter 280 can also be made of other materials.

[0171] Please refer to Table 3 and Table 4 below.

[0172]

[0173]

[0174]

[0175]

[0176] In the second embodiment, the curve equation of the aspheric surface is expressed in the same form as in the first embodiment. In addition, the definitions of the parameters in the following table are the same as those in the first embodiment and are not repeated here.

[0177] The following data can be calculated by combining Table 3 and Table 4:

[0178]

[0179] <Third embodiment>

[0180] Please refer to Figure 3A and Figure 3B ,in, Figure 3A is a schematic diagram of an imaging lens assembly according to a third embodiment of the present invention, Figure 3B From left to right are the field curvature and distortion curves of the imaging lens assembly of the third embodiment. Figure 3A As can be seen, the imaging lens assembly includes an aperture STO and, from the object side to the image side, includes: a first lens 310, a second lens 320, a third lens 330, a fourth lens 340, a fifth lens 350, a sixth lens 360, a seventh lens 370, an infrared cutoff filter 380, and an imaging surface 390. The imaging lens assembly comprises seven lenses with refractive power, but this is not limited to one embodiment.

[0181] The first lens 310 has positive refractive power and is made of plastic. Its object-side surface 311 is convex near the optical axis 300 , and its image-side surface 312 is concave near the optical axis 300 . Both the object-side surface 311 and the image-side surface 312 are aspherical.

[0182] The second lens 320 has negative refractive power and is made of plastic. Its object-side surface 321 is convex near the optical axis 300 , and its image-side surface 322 is concave near the optical axis 300 . Both the object-side surface 321 and the image-side surface 322 are aspherical.

[0183] The third lens 330 has negative refractive power and is made of plastic. Its object-side surface 331 is convex near the optical axis 300 , and its image-side surface 332 is concave near the optical axis 300 . Both the object-side surface 331 and the image-side surface 332 are aspherical.

[0184] The fourth lens 340 has positive refractive power and is made of plastic. Its object-side surface 341 is convex near the optical axis 300 , and its image-side surface 342 is convex near the optical axis 300 . Both the object-side surface 341 and the image-side surface 342 are aspherical.

[0185] The fifth lens element 350 has positive refractive power and is made of plastic. Its object-side surface 351 is convex near the optical axis 300 , and its image-side surface 352 is concave near the optical axis 300 . Both the object-side surface 351 and the image-side surface 352 are aspherical.

[0186] The sixth lens 360 has positive refractive power and is made of plastic. Its object-side surface 361 is convex near the optical axis 300 , and its image-side surface 362 is convex near the optical axis 300 . Both the object-side surface 361 and the image-side surface 362 are aspherical.

[0187] The seventh lens element 370 has negative refractive power and is made of plastic. Its object-side surface 371 is concave near the optical axis 300 , and its image-side surface 372 is concave near the optical axis 300 . Both the object-side surface 371 and the image-side surface 372 are aspherical.

[0188] The infrared cut filter 380 is made of glass and is disposed between the seventh lens 370 and the imaging surface 390 without affecting the focal length of the imaging lens group. It is understood that the infrared cut filter 380 can also be formed on the lens surface, and the infrared cut filter 380 can also be made of other materials.

[0189] Please refer to Table 5 and Table 6 below.

[0190]

[0191]

[0192]

[0193]

[0194] In the third embodiment, the curve equation of the aspheric surface is expressed in the same form as in the first embodiment. In addition, the definitions of the parameters in the following table are the same as those in the first embodiment and are not repeated here.

[0195] The following data can be calculated by combining Table 5 and Table 6:

[0196]

[0197] <Fourth embodiment>

[0198] Please refer to Figure 4A and Figure 4B ,in, Figure 4A is a schematic diagram of an imaging lens assembly according to a fourth embodiment of the present invention, Figure 4B From left to right are the field curvature and distortion curves of the imaging lens assembly of the fourth embodiment. Figure 4A As can be seen, the imaging lens assembly includes an aperture STO and, from the object side to the image side, includes: a first lens 410, a second lens 420, a third lens 430, a fourth lens 440, a fifth lens 450, a sixth lens 460, a seventh lens 470, an infrared cutoff filter 480, and an imaging surface 490. The imaging lens assembly comprises seven lenses with refractive power, but this is not limited to one embodiment.

[0199] The first lens 410 has positive refractive power and is made of plastic. Its object-side surface 411 is convex near the optical axis 400 , and its image-side surface 412 is concave near the optical axis 400 . Both the object-side surface 411 and the image-side surface 412 are aspherical.

[0200] The second lens 420 has negative refractive power and is made of plastic. Its object-side surface 421 is convex near the optical axis 400 , and its image-side surface 422 is concave near the optical axis 400 . Both the object-side surface 421 and the image-side surface 422 are aspherical.

[0201] The third lens 430 has negative refractive power and is made of plastic. Its object-side surface 431 is convex near the optical axis 400 , and its image-side surface 432 is concave near the optical axis 400 . Both the object-side surface 431 and the image-side surface 432 are aspherical.

[0202] The fourth lens 440 has positive refractive power and is made of plastic. Its object-side surface 441 is convex near the optical axis 400 , and its image-side surface 442 is convex near the optical axis 400 . Both the object-side surface 441 and the image-side surface 442 are aspherical.

[0203] The fifth lens element 450 has positive refractive power and is made of plastic. Its object-side surface 451 is convex near the optical axis 400 , and its image-side surface 452 is concave near the optical axis 400 . Both the object-side surface 451 and the image-side surface 452 are aspherical.

[0204] The sixth lens element 460 has positive refractive power and is made of plastic. Its object-side surface 461 is convex near the optical axis 400 , and its image-side surface 462 is convex near the optical axis 400 . Both the object-side surface 461 and the image-side surface 462 are aspherical.

[0205] The seventh lens element 470 has negative refractive power and is made of plastic. Its object-side surface 471 is concave near the optical axis 400 , and its image-side surface 472 is concave near the optical axis 400 . Both the object-side surface 471 and the image-side surface 472 are aspherical.

[0206] The infrared cut filter 480 is made of glass and is disposed between the seventh lens 470 and the imaging surface 490 without affecting the focal length of the imaging lens group. It is understandable that the infrared cut filter 480 can also be formed on the lens surface, and the infrared cut filter 480 can also be made of other materials.

[0207] Please refer to Table 7 and Table 8 below.

[0208]

[0209]

[0210]

[0211] In the fourth embodiment, the curve equation of the aspheric surface is expressed in the same form as in the first embodiment. In addition, the definitions of the parameters in the following table are the same as those in the first embodiment and are not repeated here.

[0212] The following data can be calculated by combining Table 7 and Table 8:

[0213]

[0214] <Fifth embodiment>

[0215] Please refer to Figure 5A and Figure 5B ,in, Figure 5A is a schematic diagram of an imaging lens assembly according to a fifth embodiment of the present invention, Figure 5B From left to right are the field curvature and distortion curves of the imaging lens assembly of the fifth embodiment. Figure 5A As can be seen, the imaging lens assembly includes an aperture STO and, from the object side to the image side, comprises: a first lens 510, a second lens 520, a third lens 530, a fourth lens 540, a fifth lens 550, a sixth lens 560, a seventh lens 570, an infrared cutoff filter 580, and an imaging surface 590. The imaging lens assembly comprises seven lenses with refractive power, but the present invention is not limited thereto.

[0216] The first lens 510 has positive refractive power and is made of glass. Its object-side surface 511 is convex near the optical axis 500, and its image-side surface 512 is concave near the optical axis 500. Both the object-side surface 511 and the image-side surface 512 are aspherical.

[0217] The second lens 520 has negative refractive power and is made of plastic. Its object-side surface 521 is convex near the optical axis 500, and its image-side surface 522 is concave near the optical axis 500. Both the object-side surface 521 and the image-side surface 522 are aspherical.

[0218] The third lens 530 has negative refractive power and is made of plastic. Its object-side surface 531 is convex near the optical axis 500, and its image-side surface 532 is concave near the optical axis 500. Both the object-side surface 531 and the image-side surface 532 are aspherical.

[0219] The fourth lens 540 has positive refractive power and is made of plastic. Its object-side surface 541 is convex near the optical axis 500 , and its image-side surface 542 is convex near the optical axis 500 . Both the object-side surface 541 and the image-side surface 542 are aspherical.

[0220] 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 500 , and its image-side surface 552 is concave near the optical axis 500 . Both the object-side surface 551 and the image-side surface 552 are aspherical.

[0221] The sixth lens 560 has positive refractive power and is made of plastic. Its object-side surface 561 is convex near the optical axis 500 , and its image-side surface 562 is convex near the optical axis 500 . Both the object-side surface 561 and the image-side surface 562 are aspherical.

[0222] The seventh lens element 570 has negative refractive power and is made of plastic. Its object-side surface 571 is concave near the optical axis 500 , and its image-side surface 572 is concave near the optical axis 500 . Both the object-side surface 571 and the image-side surface 572 are aspherical.

[0223] The infrared cut filter 580 is made of glass and is positioned between the seventh lens element 570 and the imaging surface 590 without affecting the focal length of the imaging lens assembly. It is understood that the infrared cut filter 580 can also be formed on the lens surface or made of other materials. Please refer to Tables 9 and 10 below for details.

[0224]

[0225]

[0226]

[0227] In the fifth embodiment, the curve equation of the aspheric surface is expressed in the same form as in the first embodiment. In addition, the definitions of the parameters in the following table are the same as those in the first embodiment and are not repeated here.

[0228] The following data can be calculated by combining Table 9 and Table 10:

[0229]

[0230]

[0231] <Sixth embodiment>

[0232] Please refer to Figure 6A and Figure 6B ,in, Figure 6A is a schematic diagram of an imaging lens assembly according to a sixth embodiment of the present invention, Figure 6B From left to right are the field curvature and distortion curves of the imaging lens assembly of the sixth embodiment. Figure 6A As can be seen, the imaging lens assembly includes an aperture STO and, from the object side to the image side, includes: a first lens 610, a second lens 620, a third lens 630, a fourth lens 640, a fifth lens 650, a sixth lens 660, a seventh lens 670, an infrared cutoff filter 680, and an imaging surface 690. The imaging lens assembly comprises seven lenses with refractive power, but this is not limited to one embodiment.

[0233] The first lens 610 has positive refractive power and is made of glass. Its object-side surface 611 is convex near the optical axis 600 , and its image-side surface 612 is concave near the optical axis 600 . Both the object-side surface 611 and the image-side surface 612 are aspherical.

[0234] The second lens 620 has negative refractive power and is made of plastic. Its object-side surface 621 is convex near the optical axis 600 , and its image-side surface 622 is concave near the optical axis 600 . Both the object-side surface 621 and the image-side surface 622 are aspherical.

[0235] The third lens 630 has negative refractive power and is made of plastic. Its object-side surface 631 is convex near the optical axis 600 , and its image-side surface 632 is concave near the optical axis 600 . Both the object-side surface 631 and the image-side surface 632 are aspherical.

[0236] The fourth lens 640 has positive refractive power and is made of plastic. Its object-side surface 641 is convex near the optical axis 600 , and its image-side surface 642 is convex near the optical axis 600 . Both the object-side surface 641 and the image-side surface 642 are aspherical.

[0237] The fifth lens element 650 has positive refractive power and is made of plastic. Its object-side surface 651 is convex near the optical axis 600 , and its image-side surface 652 is concave near the optical axis 600 . Both the object-side surface 651 and the image-side surface 652 are aspherical.

[0238] The sixth lens 660 has positive refractive power and is made of plastic. Its object-side surface 661 is convex near the optical axis 600 , and its image-side surface 662 is convex near the optical axis 600 . Both the object-side surface 661 and the image-side surface 662 are aspherical.

[0239] The seventh lens element 670 has negative refractive power and is made of plastic. Its object-side surface 671 is concave near the optical axis 600 , and its image-side surface 672 is concave near the optical axis 600 . Both the object-side surface 671 and the image-side surface 672 are aspherical.

[0240] The infrared cut filter 680 is made of glass and is disposed between the seventh lens 670 and the imaging surface 690 without affecting the focal length of the imaging lens group. It is understood that the infrared cut filter 680 can also be formed on the lens surface, and the infrared cut filter 680 can also be made of other materials.

[0241] Please refer to Table 11 and Table 12 below.

[0242]

[0243]

[0244]

[0245]

[0246] In the sixth embodiment, the curve equation of the aspheric surface is expressed in the same form as in the first embodiment. In addition, the definitions of the parameters in the following table are the same as in the first embodiment and are not repeated here.

[0247] The following data can be calculated by combining Table 11 and Table 12:

[0248]

[0249] <Seventh embodiment>

[0250] Please refer to Figure 7A and Figure 7B ,in, Figure 7A is a schematic diagram of an imaging lens assembly according to a seventh embodiment of the present invention, Figure 7B From left to right are the field curvature and distortion curves of the imaging lens assembly of the seventh embodiment. Figure 7A As can be seen, the imaging lens assembly includes an aperture STO and, from the object side to the image side, includes: a first lens 710, a second lens 720, a third lens 730, a fourth lens 740, a fifth lens 750, a sixth lens 760, a seventh lens 770, an infrared cutoff filter 780, and an imaging surface 790. The imaging lens assembly includes seven lenses with refractive power, but the present invention is not limited thereto.

[0251] The first lens 710 has positive refractive power and is made of glass. Its object-side surface 711 is convex near the optical axis 700, and its image-side surface 712 is concave near the optical axis 700. Both the object-side surface 711 and the image-side surface 712 are aspherical.

[0252] The second lens 720 has negative refractive power and is made of plastic. Its object-side surface 721 is convex near the optical axis 700, and its image-side surface 722 is concave near the optical axis 700. Both the object-side surface 721 and the image-side surface 722 are aspherical.

[0253] The third lens 730 has negative refractive power and is made of plastic. Its object-side surface 731 is convex near the optical axis 700, and its image-side surface 732 is concave near the optical axis 700. Both the object-side surface 731 and the image-side surface 732 are aspherical.

[0254] The fourth lens 740 has positive refractive power and is made of plastic. Its object-side surface 741 is convex near the optical axis 700, and its image-side surface 742 is convex near the optical axis 700. Both the object-side surface 741 and the image-side surface 742 are aspherical.

[0255] The fifth lens element 750 has positive refractive power and is made of plastic. Its object-side surface 751 is convex near the optical axis 700, and its image-side surface 752 is concave near the optical axis 700. Both the object-side surface 751 and the image-side surface 752 are aspherical.

[0256] The sixth lens 760 has positive refractive power and is made of plastic. Its object-side surface 761 is convex near the optical axis 700, and its image-side surface 762 is convex near the optical axis 700. Both the object-side surface 761 and the image-side surface 762 are aspherical.

[0257] The seventh lens element 770 has negative refractive power and is made of plastic. Its object-side surface 771 is concave near the optical axis 700 , and its image-side surface 772 is concave near the optical axis 700 . Both the object-side surface 771 and the image-side surface 772 are aspherical.

[0258] The infrared cut filter 780 is made of glass. It is arranged between the seventh lens 770 and the imaging surface 790 and does not affect the focal length of the imaging lens group. It can be understood that the infrared cut filter 780 can also be formed on the lens surface, and the infrared cut filter 780 can also be made of other materials.

[0259] Please refer to Table 13 and Table 14 below.

[0260]

[0261]

[0262]

[0263]

[0264] In the seventh embodiment, the curve equation of the aspheric surface is expressed in the same form as in the first embodiment. In addition, the definitions of the parameters in the following table are the same as in the first embodiment and are not repeated here.

[0265] The following data can be calculated by combining Table 13 and Table 14:

[0266]

[0267] <Eighth embodiment>

[0268] Please refer to Figure 8A and Figure 8B ,in, Figure 8A is a schematic diagram of an imaging lens assembly according to an eighth embodiment of the present invention, Figure 8B From left to right are the field curvature and distortion curves of the imaging lens assembly of the eighth embodiment. Figure 8A As can be seen, the imaging lens assembly includes an aperture STO and, from the object side to the image side, includes: a first lens 810, a second lens 820, a third lens 830, a fourth lens 840, a fifth lens 850, a sixth lens 860, a seventh lens 870, an infrared cutoff filter 880, and an imaging surface 890. The imaging lens assembly comprises seven lenses with refractive power, but this is not limited to one embodiment.

[0269] The first lens 810 has positive refractive power and is made of glass. Its object-side surface 811 is convex near the optical axis 800, and its image-side surface 812 is concave near the optical axis 800. Both the object-side surface 811 and the image-side surface 812 are aspherical.

[0270] The second lens 820 has negative refractive power and is made of plastic. Its object-side surface 821 is convex near the optical axis 800, and its image-side surface 822 is concave near the optical axis 800. Both the object-side surface 821 and the image-side surface 822 are aspherical.

[0271] The third lens 830 has negative refractive power and is made of plastic. Its object-side surface 831 is convex near the optical axis 800, and its image-side surface 832 is concave near the optical axis 800. Both the object-side surface 831 and the image-side surface 832 are aspherical.

[0272] The fourth lens 840 has positive refractive power and is made of plastic. Its object-side surface 841 is convex near the optical axis 800, and its image-side surface 842 is convex near the optical axis 800. Both the object-side surface 841 and the image-side surface 842 are aspherical.

[0273] The fifth lens 850 has positive refractive power and is made of plastic. Its object-side surface 851 is convex near the optical axis 800, and its image-side surface 852 is concave near the optical axis 800. Both the object-side surface 851 and the image-side surface 852 are aspherical.

[0274] The sixth lens 860 has positive refractive power and is made of plastic. Its object-side surface 861 is convex near the optical axis 800, and its image-side surface 862 is convex near the optical axis 800. Both the object-side surface 861 and the image-side surface 862 are aspherical.

[0275] The seventh lens element 870 has negative refractive power and is made of plastic. Its object-side surface 871 is concave near the optical axis 800 , and its image-side surface 872 is concave near the optical axis 800 . Both the object-side surface 871 and the image-side surface 872 are aspherical.

[0276] The infrared cut filter 880 is made of glass and is disposed between the seventh lens 870 and the imaging surface 890 without affecting the focal length of the imaging lens group. It can be understood that the infrared cut filter 880 can also be formed on the lens surface, and the infrared cut filter 880 can also be made of other materials.

[0277] Please refer to Table 15 and Table 16 below.

[0278]

[0279]

[0280]

[0281] In the eighth embodiment, the curve equation of the aspheric surface is expressed in the same form as in the first embodiment. In addition, the definitions of the parameters in the following table are the same as in the first embodiment and are not repeated here.

[0282] The following data can be calculated by combining Table 15 and Table 16:

[0283]

[0284] Ninth embodiment

[0285] Please refer to Figure 9 , Figure 9 The ninth embodiment of the present invention is a camera module comprising a lens barrel 1000; an imaging lens assembly disposed within the lens barrel 1000 and comprising, from the object side to the image side, a first lens 910, a second lens 920, a third lens 930, a fourth lens 940, a fifth lens 950, a sixth lens 960, a seventh lens 970, and an infrared bandpass filter 980; and an image sensor 2000, which is an electronic photosensitive component, disposed on an imaging surface 990 of the imaging lens assembly. The imaging lens assembly is illustrated as being based on the fifth embodiment described above, but is not limited thereto and may be the same as the imaging lens assembly of the other embodiments.

[0286] In the aforementioned embodiments, a person having ordinary knowledge in the relevant field should understand that in the imaging lens group and the camera module provided by the present invention, the lens can be made of glass or plastic. The glass lens can increase the freedom of the refractive power configuration of the imaging lens group, and the glass lens can be made by related technologies such as grinding or molding. The plastic lens can reduce the production cost.

[0287] In the imaging lens assembly provided by the present invention, with respect to a lens having refractive power, if the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at the near optical axis; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at the near optical axis.

[0288] The imaging lens assembly provided by the present invention can be more easily applied in optical systems requiring a large aperture and a wide viewing angle, and has the characteristics of both a large viewing angle and good imaging quality. It can be widely used in electronic imaging systems such as mobile phones, laptops, digital drawing tablets, mobile devices, digital cameras, or automotive photography.

Claims

1. An imaging lens assembly, characterized in that: It includes an aperture and, in order from the object side to the image side, includes: A first lens having a positive refractive power; A second lens having a negative refractive power, and one of the object-side surface and the image-side surface of the second lens is an aspherical surface; A third lens having a negative refractive power, and one of the object-side surface and the image-side surface of the third lens is an aspherical surface; A fourth lens having a positive refractive power, and one of the object-side surface and the image-side surface of the fourth lens is an aspherical surface; A fifth lens having a positive refractive power, and one of the object-side surface and the image-side surface of the fifth lens is an aspherical surface; A sixth lens having a positive refractive power, and one of the object-side surface and the image-side surface of the sixth lens is an aspherical surface; and A seventh lens having a negative refractive power, and one of the object-side surface and the image-side surface of the seventh lens is an aspherical surface; Where the total number of lenses with refractive power in the imaging lens group is seven, half of the maximum viewing angle of the imaging lens group is HFOV, the distance on the optical axis from the image-side surface of the seventh lens to the imaging surface is BFL, 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 object-side surface of the fourth lens is R7, the curvature radius of the image-side surface of the fourth lens is R8, the curvature radius of the object-side surface of the fifth lens is R9, the curvature radius of the image-side surface of the fifth lens is R10, and the following conditions are satisfied: 45 (degree * mm) < HFOV * BFL, -1032.81 (square mm) < R7 * R8 < -298.89 (square mm), and 5.79 ≦ (R5 * R6) / (R9 * R10) ≦ 27.

58.

2. The imaging lens assembly according to claim 1, wherein: The distance between the fourth lens and the fifth lens on the optical axis is T45, and the distance between the sixth lens and the seventh lens on the optical axis is T67, and the following conditions are satisfied: 0.41 < T45 / T67 < 1.

4.

3. The imaging lens assembly according to claim 1, wherein: The distance between the sixth lens and the seventh lens on the optical axis is T67, the curvature radius of the object-side surface of the sixth lens is R11, and the thickness of the sixth lens on the optical axis is CT6, and the following conditions are satisfied: 5.03 (mm) < T67 * R11 / CT6 < 13.55 (mm).

4. The imaging lens assembly according to claim 1, wherein: The shortest distance from the image-side surface of the seventh lens to the imaging surface is BFLM, and the distance on the optical axis from the aperture to the imaging surface is SL, and the following conditions are satisfied: 0 < BFLM / SL < 0.

18.

5. The imaging lens assembly according to claim 1, wherein: The curvature radius of the image-side surface of the first lens is R2, and the distance between the first lens and the second lens on the optical axis is T12, and the following conditions are satisfied: 169.89 < R2 / T12 < 517.

65.

6. The imaging lens assembly according to claim 1, wherein: The overall focal length of the imaging lens group is f, the curvature radius of the image-side surface of the third lens is R6, and the curvature radius of the image-side surface of the fifth lens is R10, and the following conditions are satisfied: 0.24 < f / (R6 + R10) < 0.

53.

7. The imaging lens assembly according to claim 1, wherein: The curvature radius of the object-side surface of the sixth lens is R11, and the curvature radius of the image-side surface of the fifth lens is R10, and the following conditions are satisfied:

8. The imaging lens assembly according to claim 1, wherein: The image-side surface curvature radius of the fourth lens is R8, and the image-side surface curvature radius of the sixth lens is R12, and the following condition is satisfied: 0.23 < R8 / R12 < 7.

11.

9. The imaging lens assembly according to claim 1, wherein: The distance between the first lens and the second lens on the optical axis is T12, and the distance between the second lens and the third lens on the optical axis is T23, and the following condition is satisfied: 0.05 < T12 / T23 < 0.

16.

10. The imaging lens assembly according to claim 1, wherein: The thickness of the seventh lens on the optical axis is CT7, the image-side surface curvature radius of the seventh lens is R14, and the image-side surface curvature radius of the fifth lens is R10, and the following condition is satisfied: 0.21 (mm) < CT7 * R14 / R10 < 0.55 (mm).

11. The imaging lens assembly according to claim 1, wherein: 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: 0.15 < f6 / f4 < 0.

95.

12. The imaging lens assembly according to claim 1, wherein: The object-side surface curvature radius of the fourth lens is R7, the image-side surface curvature radius of the fourth lens is R8, the object-side surface curvature radius of the fifth lens is R9, and the image-side surface curvature radius of the fifth lens is R10, and the following condition is satisfied: -66.07 < (R7 * R8) / (R9 * R10) < -7.

08.

13. A camera module, characterized in that: Comprising: A lens barrel; An imaging lens group as described in any one of claims 1 to 12, disposed in the lens barrel; and An image sensor, disposed on the imaging surface of the imaging lens group.

Images