Optical lens assembly for image capturing

Abstract

This invention provides an image-capturing optical lens assembly comprising nine lenses. The nine lenses, arranged sequentially from the object side to the image side along the optical path, are a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, and a ninth lens. Each of the nine lenses has an object-side surface facing the object side and an image-side surface facing the image side. The total number of lenses in the image-capturing optical lens assembly is nine. The first lens has positive refractive power. The second lens has negative refractive power. The image-side surface of the ninth lens is concave near the optical axis and has at least one inflection point. Under certain conditions, the image-capturing optical lens assembly can simultaneously meet the requirements of a large image sensor, miniaturization, and high image quality.

Description

[0001] This application is a divisional application. The original application was filed on May 15, 2020; application number: 202010412383.9; The invention is titled: Optical lens assembly for image acquisition, image acquisition device and electronic device. Technical Field

[0002] This invention relates to an optical lens assembly for image acquisition, and more particularly to an optical lens assembly for image acquisition that can simultaneously meet the requirements of large photosensitive elements, miniaturization, and high imaging quality. Background Technology

[0003] With advancements in semiconductor technology, the performance of electronic image sensors has improved, and pixels can be made smaller. As a result, optical lenses with high image quality have become an indispensable component.

[0004] As technology advances rapidly, electronic devices equipped with optical lenses are being used in a wider range of applications, leading to more diverse requirements for these lenses. Because traditional optical lenses often struggle to balance requirements such as image quality, sensitivity, aperture size, size, and viewing angle, this invention provides an optical lens that meets these needs. Summary of the Invention

[0005] This invention provides an optical lens assembly for image acquisition. The optical lens assembly comprises nine lenses sequentially from the object side to the image side along the optical path. Under certain conditions, the optical lens assembly for image acquisition provided by this invention can simultaneously meet the requirements of a large image sensor, miniaturization, and high image quality.

[0006] This invention provides an optical lens assembly for image acquisition, comprising nine lenses. The nine lenses, arranged sequentially from the object side to the image side along the optical path, are a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, and a ninth lens. Each of the nine lenses has an object-side surface facing the object side and an image-side surface facing the image side. The total number of lenses in the optical lens assembly is nine. The first lens has positive refractive power. The second lens has negative refractive power. The image-side surface of the ninth lens is concave near the optical axis and has at least one inflection point. The radius of curvature of the object-side surface of the ninth lens is R17, the radius of curvature of the image-side surface of the ninth lens is R18, the distance from the object-side surface of the first lens to the imaging plane on the optical axis is TL, the maximum imaging height of the imaging optical lens group is ImgH, the focal length of the imaging optical lens group is f, the entrance pupil diameter of the imaging optical lens group is EPD, the sum of the optical axis spacing between all adjacent lenses in the imaging optical lens group is ΣAT, the optical axis spacing between the second and third lenses is T23, and the optical axis spacing between the eighth and ninth lenses is T89. These conditions must be met.

[0007] -0.90 < (R17 + R18) / (R17 - R18) < 2.50;

[0008] 0.50 < TL / ImgH < 1.55;

[0009] 0.80 < f / EPD ≤ 1.89; and

[0010] 1.20 < ΣAT / (T23 + T89) ≤ 1.94.

[0011] The present invention further provides an imaging optical lens group, including nine lenses. The nine lenses are, in order from the object side to the image side along the optical path, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, the eighth lens, and the ninth lens. The nine lenses respectively have an object-side surface facing the object side and an image-side surface facing the image side. The total number of lenses in the imaging optical lens group is nine. The first lens has a positive refractive power. The second lens has a negative refractive power. The image-side surface of the ninth lens is concave near the optical axis, and the image-side surface of the ninth lens has at least one inflection point. The radius of curvature of the object-side surface of the ninth lens is R17, the radius of curvature of the image-side surface of the ninth lens is R18, the distance from the object-side surface of the first lens to the imaging surface on the optical axis is TL, the maximum imaging height of the imaging optical lens group is ImgH, the focal length of the imaging optical lens group is f, the entrance pupil diameter of the imaging optical lens group is EPD, and the maximum refractive index among all the lenses of the imaging optical lens group is Nmax, which satisfies the following conditions:

[0012] -0.90 < (R17 + R18) / (R17 - R18) < 2.50;

[0013] 0.50 < TL / ImgH < 1.55;

[0014] 0.80 < f / EPD ≤ 1.89; and

[0015] 1.67 < Nmax < 1.78.

[0016] When (R17 + R18) / (R17 - R18) satisfies the above conditions, it helps to adjust the surface shape of the ninth lens to enhance the light control ability of the image-side surface of the ninth lens and improve the image quality.

[0017] When TL / ImgH satisfies the above conditions, it can ensure a sufficient light-receiving area while compressing the total length to avoid vignetting at the periphery of the image.

[0018] When f / EPD satisfies the above conditions, it can effectively control the entrance aperture and the amount of incident light of the imaging optical lens group to improve the image brightness.

[0019] When ΣAT / (T23+T89) meets the above conditions, the spatial configuration can be adjusted to achieve a balance between the volume of the imaging optical lens group and the assembly yield.

[0020] When Nmax meets the above conditions, the manufacturing difficulty of the lens can be reduced, thereby increasing the possibility of commercializing the optical lens assembly for image capture.

[0021] The foregoing description of the invention and the following description of the embodiments are intended to demonstrate and explain the spirit and principles of the invention, and to provide a further explanation of the claims. Attached Figure Description

[0022] Figure 1 A schematic diagram of an image-capturing device according to a first embodiment of the present invention is shown.

[0023] Figure 2 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the first embodiment.

[0024] Figure 3 A schematic diagram of an image-capturing device according to a second embodiment of the present invention is shown.

[0025] Figure 4 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the second embodiment.

[0026] Figure 5 A schematic diagram of an image-capturing device according to a third embodiment of the present invention is shown.

[0027] Figure 6 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the third embodiment.

[0028] Figure 7 A schematic diagram of an image-capturing device according to a fourth embodiment of the present invention is shown.

[0029] Figure 8 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the fourth embodiment.

[0030] Figure 9 A schematic diagram of an image-capturing device according to a fifth embodiment of the present invention is shown.

[0031] Figure 10 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the fifth embodiment.

[0032] Figure 11 A schematic diagram of an image-capturing device according to a sixth embodiment of the present invention is shown.

[0033] Figure 12 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the sixth embodiment.

[0034] Figure 13 A schematic diagram of an image-capturing device according to a seventh embodiment of the present invention is shown.

[0035] Figure 14 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the seventh embodiment.

[0036] Figure 15 A schematic diagram of an imaging device according to the eighth embodiment of the present invention is shown.

[0037] Figure 16 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the eighth embodiment.

[0038] Figure 17 A schematic diagram of an image-capturing device according to a ninth embodiment of the present invention is shown.

[0039] Figure 18 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the ninth embodiment.

[0040] Figure 19 A schematic diagram of an image-capturing device according to the tenth embodiment of the present invention is shown.

[0041] Figure 20 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the tenth embodiment.

[0042] Figure 21 A schematic diagram of an image-capturing device according to the eleventh embodiment of the present invention is shown.

[0043] Figure 22 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the eleventh embodiment.

[0044] Figure 23 A schematic diagram of an image-capturing device according to the twelfth embodiment of the present invention is shown.

[0045] Figure 24 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the twelfth embodiment.

[0046] Figure 25 A perspective view of an imaging device according to a thirteenth embodiment of the present invention is shown.

[0047] Figure 26 A perspective view of one side of an electronic device according to the fourteenth embodiment of the present invention is shown.

[0048] Figure 27 Draw Figure 26 A three-dimensional diagram of the other side of the electronic device.

[0049] Figure 28 Draw Figure 26System block diagram of an electronic device.

[0050] Figure 29 A perspective view of one side of an electronic device according to the fifteenth embodiment of the present invention is shown.

[0051] Figure 30 A perspective view of one side of an electronic device according to the sixteenth embodiment of the present invention is shown.

[0052] Figure 31 A schematic diagram illustrating parameters Y31, Y92, Yc72, Yc82, Yc92, the inflection point and critical point of a portion of the lens, and the air lens ALE according to the first embodiment of the present invention is shown.

[0053] Figure 32 A schematic diagram illustrating an arrangement of reflective elements in an image-capturing optical lens assembly according to the present invention is shown.

[0054] Figure 33 A schematic diagram illustrating another configuration of the reflective element according to the present invention in an image-capturing optical lens assembly is shown.

[0055] Figure 34 A schematic diagram illustrating one configuration of two reflective elements in an image-capturing optical lens group according to the present invention is shown.

[0056] Figure 35 A schematic diagram illustrating another configuration of the two reflective elements according to the present invention in an image-capturing optical lens group is shown.

[0057] Figure 36 A schematic diagram illustrating one configuration of the three reflective elements in an image-capturing optical lens group according to the present invention is shown.

[0058] Symbol Explanation

[0059] 10, 10a, 10b, 10c, 10d, 10e, 10f, 10g, 10h, 10i, 10j, 10k, 10m, 10n, 10p... Image capturing devices;

[0060] 11...imaging lens;

[0061] 12……Drive device;

[0062] 13... Electronic photosensitive element;

[0063] 14... Image stabilization module;

[0064] 20, 30, 40... electronic devices;

[0065] 21, 31, 41... flash modules;

[0066] 22……Focus assist module;

[0067] 23...Image Signal Processor;

[0068] 24... User Interface;

[0069] 25... Image software processor;

[0070] C...critical point;

[0071] P... inflection point;

[0072] IM...imaging plane;

[0073] OA1...First optical axis;

[0074] OA2...the second optical axis;

[0075] OA3...the third optical axis;

[0076] OA4...the fourth optical axis;

[0077] LF...reflective element;

[0078] LF1...First reflecting element;

[0079] LF2...Second reflective element;

[0080] LF3...the third reflecting element;

[0081] LG...lens group;

[0082] 100, 200, 300, 400, 500, 600, 700, 800, 900, 1000, 1100, 1200... aperture;

[0083] 101, 201, 301, 401, 501, 601, 701, 801, 901, 1001, 1101, 1201... aperture;

[0084] 110, 210, 310, 410, 510, 610, 710, 810, 910, 1010, 1110, 1210... First lens;

[0085] 111, 211, 311, 411, 511, 611, 711, 811, 911, 1011, 1111, 1211... object side surface;

[0086] 112, 212, 312, 412, 512, 612, 712, 812, 912, 1012, 1112, 1212... like the side surface;

[0087] 120, 220, 320, 420, 520, 620, 720, 820, 920, 1020, 1120, 1220... second lens;

[0088] 121, 221, 321, 421, 521, 621, 721, 821, 921, 1021, 1121, 1221... object side surface;

[0089] 122, 222, 322, 422, 522, 622, 722, 822, 922, 1022, 1122, 1222... like the side surface;

[0090] 130, 230, 330, 430, 530, 630, 730, 830, 930, 1030, 1130, 1230... third lens;

[0091] 131, 231, 331, 431, 531, 631, 731, 831, 931, 1031, 1131, 1231... object side surface;

[0092] 132, 232, 332, 432, 532, 632, 732, 832, 932, 1032, 1132, 1232... like the side surface;

[0093] 140, 240, 340, 440, 540, 640, 740, 840, 940, 1040, 1140, 1240... Fourth lens;

[0094] 141, 241, 341, 441, 541, 641, 741, 841, 941, 1041, 1141, 1241... object side surface;

[0095] 142, 242, 342, 442, 542, 642, 742, 842, 942, 1042, 1142, 1242... like the side surface;

[0096] 150, 250, 350, 450, 550, 650, 750, 850, 950, 1050, 1150, 1250... the fifth lens;

[0097] 151, 251, 351, 451, 551, 651, 751, 851, 951, 1051, 1151, 1251... object side surface;

[0098] 152, 252, 352, 452, 552, 652, 752, 852, 952, 1052, 1152, 1252... like the side surface;

[0099] 160, 260, 360, 460, 560, 660, 760, 860, 960, 1060, 1160, 1260... the sixth lens;

[0100] 161, 261, 361, 461, 561, 661, 761, 861, 961, 1061, 1161, 1261... object side surface;

[0101] 162, 262, 362, 462, 562, 662, 762, 862, 962, 1062, 1162, 1262... like the side surface;

[0102] 170, 270, 370, 470, 570, 670, 770, 870, 970, 1070, 1170, 1270... the seventh lens;

[0103] 171, 271, 371, 471, 571, 671, 771, 871, 971, 1071, 1171, 1271... object side surface;

[0104] 172, 272, 372, 472, 572, 672, 772, 872, 972, 1072, 1172, 1272... like the side surface;

[0105] 180, 280, 380, 480, 580, 680, 780, 880, 980, 1080, 1180, 1280... Eighth lens

[0106] 181, 281, 381, 481, 581, 681, 781, 881, 981, 1081, 1181, 1281... object side surface;

[0107] 182, 282, 382, ​​482, 582, 682, 782, 882, 982, 1082, 1182, 1282... like the side surface;

[0108] 190, 290, 390, 490, 590, 690, 790, 890, 990, 1090, 1190, 1290... Ninth Lens

[0109] 191, 291, 391, 491, 591, 691, 791, 891, 991, 1091, 1191, 1291... object side surface;

[0110] 192, 292, 392, 492, 592, 692, 792, 892, 992, 1092, 1192, 1292... like the side surface;

[0111] 193, 293, 393, 493, 593, 693, 793, 893, 993, 1093, 1193, 1293... filter elements;

[0112] 196, 296, 396, 496, 596, 696, 796, 896, 996, 1096, 1196, 1296... imaging planes;

[0113] 199, 299, 399, 499, 599, 699, 799, 899, 999, 1099, 1199, 1299... electronic photosensitive element;

[0114] Y31……The maximum effective radius of the object-side surface of the third lens;

[0115] Y92... The maximum effective radius of the image-side surface of the ninth lens;

[0116] Yc72……The perpendicular distance between the critical point of the image-side surface of the seventh lens and the optical axis;

[0117] Yc82……The perpendicular distance between the critical point of the image-side surface of the eighth lens and the optical axis;

[0118] Yc92……The vertical distance between the critical point of the image-side surface of the ninth lens and the optical axis. Detailed Implementation

[0119] The imaging optical lens assembly may comprise three lens groups, which are arranged sequentially from the object side to the image side along the optical path as a first lens group, a second lens group, and a third lens group. The first lens group may comprise at least two lenses, the second lens group may comprise at least three lenses, and the third lens group may comprise at least three lenses. All lenses in the imaging optical lens assembly have an object-side surface facing the object side and an image-side surface facing the image side.

[0120] At least four lenses in the imaging optical lens group can be made of plastic; this effectively reduces production costs and increases manufacturing speed, thereby increasing the possibility of mass production and enhancing design freedom, which is beneficial for optimizing off-axis aberrations. All lenses in the third lens group can be made of plastic. Half of the maximum angle of view in the imaging optical lens group can be greater than 35 degrees; this meets the needs of general users and increases market acceptance.

[0121] In the first lens group, at least two lenses may each have a convex object-side surface near the optical axis and a concave image-side surface near the optical axis. This helps to improve coma and astigmatism.

[0122] In the second lens group, at least one lens may have at least one aspherical surface, either its object-side surface or its image-side surface. This effectively corrects system aberrations and controls the overall thickness of the second lens group to avoid occupying excessive space.

[0123] In the third lens group, at least two lenses may each have convex object-side surfaces near the optical axis and concave image-side surfaces near the optical axis; thereby increasing the effective radius of the image-side lens of the imaging optical lens group to correct peripheral aberrations. All lenses in the third lens group may have at least two lens surfaces with at least one critical point off-axis, wherein the at least two lens surfaces may be the lens surface of the same lens or the lens surfaces of different lenses; thereby correcting off-axis aberrations and reducing image curvature. Please refer to... Figure 31 This is a schematic diagram illustrating the critical point C of the seventh lens 170, the eighth lens 180, and the ninth lens 190 at the off-axis according to the first embodiment of the present invention. Figure 31 The critical points of the seventh, eighth, and ninth lenses at the off-axis are illustrated in the first embodiment as an example. However, in other embodiments of the present invention, in addition to the seventh, eighth, and ninth lenses, other lenses may also have one or more critical points at the off-axis.

[0124] In the following, among all the lenses in the imaging optical lens group, the lens closest to the object side is defined as the object-side lens, and the lens closest to the image side is defined as the image-side lens or the last lens. In one embodiment, the first lens group may contain three lenses, the second lens group may contain three lenses, the third lens group may contain three lenses, and the imaging optical lens group may contain nine lenses. The nine lenses are arranged sequentially from the object side to the image side along the optical path as the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, the eighth lens, and the ninth lens. Each of the nine lenses has an object-side surface facing the object side and an image-side surface facing the image side. That is, the first lens closest to the object side is the object-side lens, and the ninth lens closest to the image side is the image-side lens or the last lens.

[0125] The first lens may have positive refractive power; thereby, it can provide the main converging power to effectively compress the space of the imaging optical lens group and achieve the requirement of miniaturization. The object-side surface of the first lens may be convex near the optical axis; thereby, it can reduce the angle between the light and the object-side surface of the first lens to avoid total internal reflection.

[0126] The second lens can have negative refractive power; thereby, it can balance the aberrations produced by the first lens, and thus correct spherical aberration and chromatic aberration. The object-side surface of the second lens can be convex near the optical axis, and the image-side surface of the second lens can be concave near the optical axis; thereby, it can effectively balance the aberrations produced by the first lens, so as to improve image quality.

[0127] The image-side surface of the third lens can be concave near the optical axis. This allows for a balance between the angle of view and the volume of the imaging optical lens group, thus meeting product requirements.

[0128] The sixth lens can have negative refractive power. This allows for a balance of the refractive power configuration of the imaging optical lens group, resulting in better image quality.

[0129] The object-side surface of the seventh lens can be convex near the optical axis, and the image-side surface of the seventh lens can be concave near the optical axis. This balances the light path directions in the meridional and sagittal directions, which helps to correct astigmatism.

[0130] The eighth lens may have positive refractive power; thereby, it can balance the refractive power of the ninth lens to reduce overall aberration. The image-side surface of the eighth lens may be concave near the optical axis; thereby, it can help compress the back focal length and avoid excessive volume. In one embodiment, when the object-side surface of the eighth lens is convex near the optical axis and the image-side surface of the eighth lens is concave near the optical axis, the effective radius of the eighth lens can be increased to correct peripheral light.

[0131] The ninth lens can have negative refractive power; this facilitates miniaturization of the module, making it suitable for use in electronic devices with stringent size constraints. The image-side surface of the ninth lens can be concave near the optical axis; this helps to shorten the back focal length to meet miniaturization requirements. In one embodiment, when both the object-side and image-side surfaces of the ninth lens are concave near the optical axis, it helps to maintain good image quality at different object distances.

[0132] Among the first to ninth lenses, there are no other interposed solid lenses between each lens. That is to say, there are no other solid lenses between two adjacent lenses, but other optical elements such as air lenses or light shields may be included.

[0133] In the imaging optical lens group disclosed by the present invention, at least three lenses each have at least one inflection point on at least one of their object-side surface and image-side surface; thereby, it helps to correct image curvature to meet the miniaturization characteristics and make the Petzval Surface of the imaging optical lens group flatter. Among them, at least one lens in the second lens group has at least one inflection point on at least one of its object-side surface and image-side surface; thereby, off-axis field aberration can be corrected. Among them, at least one lens in the third lens group has at least one inflection point on at least one of its object-side surface and image-side surface; thereby, it is beneficial to correct off-axis aberration and reduce the volume of the imaging optical lens group. Among them, the image-side surface of the eighth lens can have at least two inflection points; thereby, local light condensing adjustment can be performed for the off-axis field, and the peripheral image quality during close-up shooting can be improved. Among them, the image-side surface of the ninth lens can have at least one inflection point; thereby, it is beneficial to correct off-axis aberration and reduce the volume of the imaging optical lens group. Among them, the image-side surface of the ninth lens can have at least two inflection points; thereby, local light condensing adjustment can be performed for the off-axis field, and the peripheral image quality during close-up shooting can be improved. Please refer to Figure 31 , which is a schematic diagram showing the inflection point P of some lenses in the first embodiment of the present invention. Figure 31 The inflection points of the third lens 130 to the ninth lens 190 in the first embodiment are shown as an exemplary illustration. However, in each embodiment of the present invention, in addition to the third lens to the ninth lens, other lenses can also have one or more inflection points.

[0134] The radius of curvature of the object-side surface of the ninth lens is R17, and the radius of curvature of the image-side surface of the ninth lens is R18, which can satisfy the following conditions: -0.90 < (R17 + R18) / (R17 - R18) < 2.50. Thereby, it helps to adjust the surface shape of the ninth lens to enhance the light control ability of the image-side surface of the ninth lens and improve the image quality. Among them, the following conditions can also be satisfied: -0.90 < (R17 + R18) / (R17 - R18) < 0.55. Among them, the following conditions can also be satisfied: -0.70 < (R17 + R18) / (R17 - R18) < 0.43. Among them, the following conditions can also be satisfied: -0.50 < (R17 + R18) / (R17 - R18) < 1.50.

[0135] The maximum value of the thickness on the optical axis among all the lenses of the imaging optical lens group is CTmax, and the minimum value of the thickness on the optical axis among all the lenses of the imaging optical lens group is CTmin, which can satisfy the following conditions: 1.0 < CTmax / CTmin < 6.0. Thereby, it helps to control the lens thickness to ensure the molding quality of the lens and maintain the molding stability. Among them, the following conditions can also be satisfied: 2.50 < CTmax / CTmin < 5.0.

[0136] In the imaging optical lens assembly disclosed in this invention, an air lens may be provided between the eighth and ninth lenses. It is worth noting that the air lens utilizes the space between the two lenses, using air as a medium, and the adjacent surfaces of these two lenses as refractive surfaces to converge light and correct peripheral images. When the air lens is positioned on the object side of the last lens, light beams from different fields of view can be converged at the image side, thereby optimizing the light focusing of the imaging surface. The radius of curvature of the object-side surface of the air lens is Rao, and the radius of curvature of the image-side surface of the air lens is Rai, which can satisfy the following condition: -25.0 < (Rao + Rai) / (Rao - Rai) < 10.0. This helps to optimize the shooting quality at different object distances. It can also satisfy the following condition: -15.0 < (Rao + Rai) / (Rao - Rai) < 0.50. It can also satisfy the following condition: -1.50 < (Rao + Rai) / (Rao - Rai) < 0.50. Please refer to... Figure 31 This is a schematic diagram illustrating an air lens ALE between the eighth lens 180 and the ninth lens 190 according to the first embodiment of the present invention (i.e., between the image-side surface 182 of the eighth lens and the object-side surface 191 of the ninth lens; or the object side of the ninth lens 190).

[0137] The Abbe number of the first lens is V1, the Abbe number of the second lens is V2, the Abbe number of the third lens is V3, the Abbe number of the fourth lens is V4, the Abbe number of the fifth lens is V5, the Abbe number of the sixth lens is V6, the Abbe number of the seventh lens is V7, the Abbe number of the eighth lens is V8, the Abbe number of the ninth lens is V9, and the Abbe number of the i-th lens is Vi. The refractive index of the first lens is N1, the refractive index of the second lens is N2, the refractive index of the third lens is N3, the refractive index of the fourth lens is N4, the refractive index of the fifth lens is N5, the refractive index of the sixth lens is N6, the refractive index of the seventh lens is N7, the refractive index of the eighth lens is N8, the refractive index of the ninth lens is N9, and the refractive index of the i-th lens is Ni. The minimum value of Vi / Ni is (Vi / Ni)min, which can satisfy the following condition: 7.0 < (Vi / Ni)min < 11.80, where i = 1, 2, 3, 4, 5, 6, 7, 8, or 9. This allows the imaging optical lens group to have sufficient image control capabilities to correct various aberrations. The following condition can also be satisfied: 9.0 < (Vi / Ni)min < 11.50, where i = 1, 2, 3, 4, 5, 6, 7, 8, or 9.

[0138] The Abbe number of the sixth lens is V6, which can satisfy the following conditions: 10.0 < V6 < 40.0. Thereby, better chromatic aberration balancing ability of the sixth lens can be provided to avoid the imaging position shift caused by light rays of different wavelength bands. Among them, the following conditions can also be satisfied: 30.0 < V6 < 40.0.

[0139] The Abbe number of the seventh lens is V7, which can satisfy the following conditions: 1-0 < V7 < 40.0. Thereby, it can assist the sixth lens to balance chromatic aberration and relieve the surface curvature of the sixth lens to improve the imaging quality. Among them, the following conditions can also be satisfied: 30.0 < V7 < 40.0.

[0140] The focal length of the imaging optical lens group is f, and the focal length of the eighth lens is f8, which can satisfy the following conditions: 0.65 < f / f8 < 1.50. Thereby, the control ability of the imaging optical lens group at the image-side end lens can be ensured to achieve good imaging quality.

[0141] The radius of curvature of the object-side surface of the ninth lens is R17, and the radius of curvature of the image-side surface of the ninth lens is R18, which can satisfy the following conditions: 0.25 < |R17 / R18| < 2.50. Thereby, the lens surface curvature of the ninth lens can be controlled to balance the refraction ability of the object-side surface and the image-side surface. Among them, the following conditions can also be satisfied: 0.80 < |R17 / R18| < x2.0.

[0142] The distance from the object-side surface of the first lens to the imaging surface on the optical axis is TL, and the maximum imaging height of the imaging optical lens group is ImgH (i.e., half of the total length of the diagonal of the effective sensing area of the electronic photosensitive element), which can satisfy the following conditions: 0.50 < TL / ImgH < 1.55. Thereby, sufficient light-receiving area can be ensured while compressing the total length to avoid vignetting at the periphery of the image. Among them, the following conditions can also be satisfied: 0.90 < TL / ImgH < 1.35.

[0143] The maximum imaging height of the imaging optical lens group is ImgH, and the distance from the image-side surface of the ninth lens to the imaging surface on the optical axis is BL, which can satisfy the following conditions: <5.0 < ImgH / BL < 20.0. Thereby, the back focal length can be effectively compressed while having a large light-receiving range.

[0144] The focal length of the imaging optical lens group is f, and the focal length of the first lens is f1, which can satisfy the following conditions: 0.40 < f / f1 < 3.80. Thereby, it can be ensured that the first lens provides sufficient converging ability for the imaging optical lens group at the object side, and avoid excessive aberration caused by excessive lens surface curvature. Among them, the following conditions can also be satisfied: 0.80 < f / f1 < 1.80. [[ID=!9]]

[0145] The maximum effective radius of the object-side surface of the third lens is Y31, and the maximum effective radius of the image-side surface of the ninth lens is Y92, which can satisfy the following conditions: 2.80 < Y92 / Y31 < 4.50. Thereby, the proportional relationship of the effective radii of the lenses can be effectively controlled to facilitate increasing the viewing angle and imaging height. Among them, the following conditions can also be satisfied: 3.0 < Y92 / Y31 < 4.0. Please refer to Figure 31 , which is a schematic diagram showing the parameters Y31 and Y92 in the first embodiment of the present invention.

[0146] The Abbe number of the first lens is V1, the Abbe number of the second lens is V2, and the Abbe number of the third lens is V3, which can satisfy the following conditions: 0.10 < (V2 + V3) / V1 < 0.90. Thereby, the density difference between the lens material at the object-side end and air can be strengthened, and the optical path control ability can be improved within a limited space.

[0147] The entrance pupil diameter of the imaging optical lens group is EPD, and the distance from the image-side surface of the ninth lens to the imaging surface on the optical axis is BL, which can satisfy the following conditions: 3.2 < EPD / BL < 18.0. Thereby, an appropriate back focal length can be reserved for assembly in a limited space, and at the same time, it is ensured that the imaging optical lens group has sufficient light input to meet the specification requirements of the product device.

[0148] The vertical distance between the critical point of the image-side surface of the seventh lens and the optical axis is Yc72, and the focal length of the imaging optical lens group is f, which can satisfy the following conditions: 0.02 < Yc72 / f < 0.80. Thereby, the off-axis aberration correction ability of the imaging optical lens group at the image-side end can be strengthened, and it is beneficial to reduce distortion and image curvature. Please refer to Figure 31 , which is a schematic diagram showing the parameter Yc72 in the first embodiment of the present invention.

[0149] The vertical distance between the critical point of the image-side surface of the eighth lens and the optical axis is Yc82, and the focal length of the imaging optical lens group is f, which can satisfy the following conditions: 0.02 < Yc82 / f < 0.80. Thereby, good imaging quality can be provided at different object distances. Please refer to Figure 31 , which is a schematic diagram showing the parameter Yc82 in the first embodiment of the present invention.

[0150] The vertical distance between the critical point of the image-side surface of the ninth lens and the optical axis is Yc92, and the focal length of the imaging optical lens group is f, which can satisfy the following conditions: 0.02 < Yc92 / f < 0.80. Thereby, peripheral image distortion can be effectively avoided, and the brightness of the surrounding images can be maintained. Please refer to Figure 31 , which is a schematic diagram showing the parameter Yc92 in the first embodiment of the present invention.

[0151] In the optical lens group for imaging, at least four lenses may each have an Abbe number less than 40.0. Thereby, it is possible to ensure that the lens materials in the optical lens group for imaging have sufficient ability to control light, balance the focusing positions of light in different wavelength bands, and avoid image overlap.

[0152] The distance from the image-side surface of the ninth lens to the imaging surface on the optical axis is BL, and the distance from the object-side surface of the first lens to the image-side surface of the ninth lens on the optical axis is TD, which can satisfy the following condition: 0 < BL / TD < 0.25. Thereby, it helps to shorten the back focal length and control the total length of the optical lens group for imaging. Among them, the following condition can also be satisfied: 0.03 < BL / TD < 0.18.

[0153] The focal length of the optical lens group for imaging is f, and the entrance pupil diameter of the optical lens group for imaging is EPD, which can satisfy the following condition: 0.80 < f / EPD < 2.0. Thereby, it can effectively control the light entrance aperture and light entrance amount of the optical lens group for imaging to improve image brightness. Among them, the following condition can also be satisfied: 1.20 < f / EPD < 1.80.

[0154] The minimum Abbe number among all the lenses in the optical lens group for imaging is Vmin, which can satisfy the following condition: 8.0 < Vmin < 20.0. Thereby, it can regulate the optical path, balance the converging ability between light in different wavelength bands, and correct chromatic aberration. Among them, the following condition can also be satisfied: 5.0 < Vmin < 19.0.

[0155] The sum of the spacing distances between all adjacent lenses in the optical lens group for imaging on the optical axis is ΣAT, the spacing distance between the second lens and the third lens on the optical axis is T23, and the spacing distance between the eighth lens and the ninth lens on the optical axis is T89, which can satisfy the following condition: 1.20 < ΣAT / (T23 + T89) < 2.50. Thereby, it can regulate the spatial configuration to balance the volume of the optical lens group for imaging and the assembly yield rate.

[0156] The refractive power of the first lens is P1, the refractive power of the second lens is P2, the refractive power of the third lens is P3, the refractive power of the fourth lens is P4, the refractive power of the fifth lens is P5, the refractive power of the sixth lens is P6, the refractive power of the seventh lens is P7, the refractive power of the eighth lens is P8, and the refractive power of the ninth lens is P9, which can satisfy the following condition: 0.10 < (|P2| + |P3| + |P4| + |P5| + |P6| + |P7|) / (|P1| + |P8| + |P9|) < 1.0. Thereby, it can balance the refractive powers at the object side end and the image side end of the optical lens group for imaging to improve symmetry and reduce sensitivity. The refractive power of the aforementioned single lens is the ratio of the focal length of the optical lens group for imaging to the focal length of the single lens.

[0157] The maximum refractive index among all the lenses of the imaging optical lens group is Nmax, which can satisfy the following conditions: 1.66 < Nmax < 1.78. Thereby, the manufacturing difficulty of the lenses can be reduced, and the possibility of commercializing the imaging optical lens group can be enhanced. Among them, the following conditions can also be satisfied: 1.67 < Nmax < 1.72.

[0158] The maximum imaging height of the imaging optical lens group is ImgH, which can satisfy the following conditions: 4.50 [mm] < ImgH < 10.0 [mm]. Thereby, sufficient light-receiving area and image brightness can be provided, and the specification requirements can be met. Among them, the following conditions can also be satisfied: 5.80 [mm] < ImgH < 9.0 [mm].

[0159] The distance from the object side surface of the first lens to the image side surface of the ninth lens on the optical axis is TD, the distance from the image side surface of the ninth lens to the imaging surface on the optical axis is BL, and the maximum imaging height of the imaging optical lens group is ImgH, which can satisfy the following conditions: 0.05 < (TD × BL) / (ImgH × ImgH) < 0.30. Thereby, the proportional relationship between the axial dimension and the off-axis dimension in the imaging optical lens group can be balanced, and the space utilization efficiency can be enhanced. Among them, the following conditions can also be satisfied: 0.16 < (TD × BL) / (ImgH × ImgH) ≤ 0.20.

[0160] The distance from the object side surface of the first lens to the imaging surface on the optical axis is TL, which can satisfy the following conditions: 4.0 [mm] < TL < 10.0 [mm]. Thereby, it is beneficial to control the total length, expand the product application range, and meet the current market demands.

[0161] The total thickness of all the lenses of the imaging optical lens group on the optical axis is ΣCT, and the total distance between all adjacent lenses of the imaging optical lens group on the optical axis is ΣAT, which can satisfy the following conditions: 1.20 < ΣCT / ΣAT < 2. The relationship between the lens thickness and the lens gap can be balanced, which is beneficial to lens assembly and improve the yield rate.

[0162] The distance from the object side surface of the first lens to the imaging surface on the optical axis is TL, and the focal length of the imaging optical lens group is f, which can satisfy the following conditions: 0.80 < TL / f < 1.30. Thereby, the total length can be balanced and the viewing angle can be controlled to meet the product application requirements.

[0163] The imaging optical lens group disclosed in the present invention further includes an aperture. The distance from the aperture to the imaging surface on the optical axis is SL, and the distance from the object side surface of the first lens to the imaging surface on the optical axis is TL, which can satisfy the following conditions:  0.73 < SL / TL < 0.95. Thereby, the aperture position can be effectively balanced, which is beneficial to controlling the volume of the imaging optical lens group.

[0164] The focal length of the imaging optical lens group is f, the radius of curvature of the object-side surface of any lens in the imaging optical lens group is Ro, and the radius of curvature of the image-side surface of the any lens is Ri. At least one lens in the imaging optical lens group satisfies the following condition: |f / Ro| + |f / Ri| < 0.50. Thereby, it is ensured that at least one lens in the imaging optical lens group can be used as an aberration correction lens (Correction Lens), and the curvature of the surface of any lens is prevented from being too large, enabling it to have the function of balancing the aberrations of the front and rear lenses. Among them, at least one lens in the imaging optical lens group may also satisfy the following condition: |f / Ro| + |f / Ri| < 0.20.

[0165] The maximum imaging height of the imaging optical lens group is ImgH, and the maximum value of the thickness on the optical axis among all the lenses of the imaging optical lens group is CTmax, which satisfies the following condition: 5.0 < ImgH / CTmax < 15.0. Thereby, the proportion of the lens thickness in the imaging optical lens group can be controlled to improve the assembly quality and the yield rate. Among them, it may also satisfy the following condition: 6.0 < ImgH / CTmax < 10.0.

[0166] Each of the technical features in the above-described imaging optical lens group of the present invention can be combined and configured to achieve the corresponding effects.

[0167] In the imaging optical lens group disclosed by the present invention, the material of the lens can be glass or plastic. If the material of the lens is glass, the freedom of refractive power configuration of the imaging optical lens group can be increased, and the influence of the change in the external environmental temperature on imaging can be reduced, and the glass lens can be made by techniques such as grinding or molding. If the lens material is plastic, the production cost can be effectively reduced. In addition, a spherical surface or an aspherical surface (ASP) can be provided on the lens surface. The spherical lens can reduce the manufacturing difficulty, and if an aspherical surface is provided on the lens surface, more control variables can be obtained thereby to eliminate aberrations, reduce the number of lenses, and effectively reduce the total length of the imaging optical lens group of the present invention. Further, the aspherical surface can be made by methods such as plastic injection molding or molding of glass lenses.

[0168] In the imaging optical lens group disclosed by the present invention, if the lens surface is an aspherical surface, it means that all or a part of the optically effective area of the lens surface is an aspherical surface.

[0169] In the imaging optical lens assembly disclosed in this invention, additives can be selectively added to any (or more) lens materials to change the lens's transmittance for specific wavelengths of light, thereby reducing stray light and color shift. For example, the additives may have the function of filtering out light in the 600 nm to 800 nm wavelength range in the system to help reduce excess red or infrared light; or they may filter out light in the 350 nm to 450 nm wavelength range to reduce excess blue or ultraviolet light. Therefore, the additives can prevent specific wavelengths of light from interfering with imaging. Furthermore, the additives can be uniformly mixed into plastic and manufactured into lenses using injection molding technology.

[0170] In the imaging optical lens assembly disclosed in this invention, if the lens surface is convex and the position of the convex surface is not defined, it means that the convex surface can be located near the optical axis of the lens surface; if the lens surface is concave and the position of the concave surface is not defined, it means that the concave surface can be located near the optical axis of the lens surface. If the refractive power or focal length of the lens is not defined in its region, it means that the refractive power or focal length of the lens can be the refractive power or focal length of the lens near the optical axis.

[0171] In the imaging optical lens assembly disclosed in this invention, the inflection point of the lens surface refers to the boundary point where the curvature of the lens surface changes from positive to negative. The critical point of the lens surface refers to the point of tangency on the tangent line between a plane perpendicular to the optical axis and the lens surface, and the critical point is not located on the optical axis.

[0172] In the imaging optical lens group disclosed in this invention, the imaging surface of the imaging optical lens group can be a plane or a curved surface with any curvature, depending on the corresponding electronic photosensitive element, especially a curved surface with the concave surface facing the object side.

[0173] In the imaging optical lens assembly disclosed in this invention, one or more imaging correction elements (such as planar elements) can be selectively disposed between the lens closest to the imaging surface and the imaging surface in the imaging optical path to achieve the effect of correcting image curvature (such as image distortion). The optical properties of this imaging correction element, such as curvature, thickness, refractive index, position, and surface type (convex or concave, spherical or aspherical, diffractive surface, and Fresnel surface, etc.), can be adjusted according to the requirements of the imaging device. Generally, a preferred configuration of the imaging correction element is to place a thin plano-concave element with a concave surface in the object-side direction close to the imaging surface.

[0174] In the imaging optical lens assembly disclosed in this invention, at least one reflective element with a deflecting optical path function, such as a prism or a mirror, can be selectively disposed between the subject and the imaging surface in the imaging optical path. This provides a more flexible spatial configuration for the imaging optical lens assembly, allowing the thinning and lightening of electronic devices to be unrestricted by the total optical length of the imaging optical lens assembly. For further explanation, please refer to... Figure 32 and Figure 33 ,in Figure 32 This is a schematic diagram illustrating an arrangement of reflective elements according to the present invention within an image-collecting optical lens assembly, and Figure 33 This is a schematic diagram illustrating another configuration of the reflective element according to the present invention within an image-collecting optical lens assembly. For example... Figure 32 and Figure 33 As shown, the imaging optical lens group can travel along the light path from the subject (not shown) to the imaging plane IM, and sequentially includes a first optical axis OA1, a reflective element LF, and a second optical axis OA2, wherein the reflective element LF can be as follows: Figure 32 The image shown is a lens group LG positioned between the subject and the image-capturing optical lens group, or as... Figure 33 The diagram shows the lens group LG positioned between the image-capturing optical lens assembly and the imaging plane IM. Furthermore, please refer to... Figure 34 and Figure 35 ,in Figure 34 This is a schematic diagram illustrating an arrangement of two reflective elements in an image-collecting optical lens assembly according to the present invention, and Figure 35 A schematic diagram illustrating another configuration of the two reflective elements according to the present invention in an image-collecting optical lens assembly is shown. Figure 34 and Figure 35 As shown, the imaging optical lens group can also travel along the light path from the subject (not shown) to the imaging plane IM, and sequentially includes a first optical axis OA1, a first reflective element LF1, a second optical axis OA2, a second reflective element LF2, and a third optical axis OA3. The first reflective element LF1 is disposed between the subject and the lens group LG of the imaging optical lens group, and the second reflective element LF2 is disposed between the lens group LG of the imaging optical lens group and the imaging plane IM. The direction of light travel along the first optical axis OA1 can be as follows: Figure 34 The direction shown is the same as the direction of light travel along the third optical axis OA3, or as... Figure 35 The direction shown is opposite to the direction of light travel along the third optical axis OA3. Additionally, please refer to... Figure 36 A schematic diagram illustrating one arrangement of the three reflective elements according to the present invention within an image-collecting optical lens assembly is shown. Figure 36As shown, the imaging optical lens group can also be arranged along the optical path from the subject (not shown) to the imaging plane IM, and sequentially includes a first optical axis OA1, a first reflective element LF1, a second optical axis OA2, a second reflective element LF2, a third optical axis OA3, a third reflective element LF3, and a fourth optical axis OA4. The first reflective element LF1 is disposed between the subject and the lens group LG of the imaging optical lens group, and the second and third reflective elements LF2 and LF3 are disposed between the lens group LG of the imaging optical lens group and the imaging plane IM. The imaging optical lens group can also optionally be configured with more than four reflective elements; the present invention is not limited to the type, number, and position of the reflective elements disclosed in the accompanying drawings.

[0175] The imaging optical lens group disclosed in this invention may be provided with at least one aperture stop, which may be located in front of the first lens, between the lenses, or after the last lens. The aperture stop may be of the type such as a glare stop or a field stop, which can be used to reduce stray light and help improve image quality.

[0176] In the imaging optical lens assembly disclosed in this invention, the aperture can be configured as a front aperture or a central aperture. A front aperture means the aperture is positioned between the subject and the first lens, while a central aperture means the aperture is positioned between the first lens and the imaging plane. A front aperture allows for a longer distance between the exit pupil and the imaging plane, resulting in a telecentric effect and increasing the efficiency of image reception by the CCD or CMOS sensor. A central aperture helps to expand the field of view of the imaging optical lens assembly.

[0177] This invention may appropriately incorporate a variable aperture element, which can be a mechanical component or a light-regulating element, and whose aperture size and shape can be controlled electrically or by electrical signals. The mechanical component may include movable parts such as a blade assembly or a shielding plate; the light-regulating element may include a filter element, an electrochromic material, a liquid crystal layer, or other masking materials. This variable aperture element can enhance image adjustment capabilities by controlling the amount of light entering the image or the exposure time. Furthermore, this variable aperture element can also be the aperture of this invention, allowing image quality, such as depth of field or exposure speed, to be adjusted by changing the aperture value.

[0178] Based on the above implementation methods, specific embodiments are presented below and described in detail with reference to the accompanying drawings.

[0179] <First Embodiment>

[0180] Please refer to Figures 1 to 2 ,in Figure 1 A schematic diagram of an image-capturing device according to a first embodiment of the present invention is shown. Figure 2From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the first embodiment. Figure 1 As can be seen, the image capturing device includes an image capturing optical lens group (not otherwise labeled) and an electronic photosensitive element 199. The image capturing optical lens group, arranged sequentially from the object side to the image side along the optical path, includes an aperture 100, 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 eighth lens 180, a ninth lens 190, an aperture stop 101, a filter element 193, and an imaging surface 196. The image capturing optical lens group has a configuration of a first lens group (first lens 110, second lens 120, and third lens 130), a second lens group (fourth lens 140, fifth lens 150, and sixth lens 160), and a third lens group (seventh lens 170, eighth lens 180, and ninth lens 190). The electronic photosensitive element 199 is disposed on the imaging surface 196. The image-taking optical lens group consists of nine lenses (110, 120, 130, 140, 150, 160, 170, 180, 190), and there are no other interposed lenses between each lens.

[0181] The first lens 110 has positive refractive power and is made of plastic. Its object-side surface 111 is convex near the optical axis, and its image-side surface 112 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 111 has a point of inflection, and its image-side surface 112 has a point of inflection.

[0182] The second lens 120 has negative refractive power and is made of plastic. Its object-side surface 121 is convex near the optical axis, and its image-side surface 122 is concave near the optical axis. Both of its surfaces are aspherical.

[0183] The third lens 130 has negative refractive power and is made of plastic. Its object-side surface 131 is convex near the optical axis, and its image-side surface 132 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 131 has one inflection point, and its image-side surface 132 has two inflection points.

[0184] The fourth lens 140 has negative refractive power and is made of plastic. Its object-side surface 141 is convex near the optical axis, and its image-side surface 142 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 141 has two inflection points, and its image-side surface 142 has two inflection points.

[0185] The fifth lens 150 has positive refractive power and is made of plastic. Its object-side surface 151 is convex near the optical axis, and its image-side surface 152 is convex near the optical axis. Both surfaces are aspherical. Its object-side surface 151 has three inflection points, and its image-side surface 152 has two inflection points.

[0186] The sixth lens 160 has negative refractive power and is made of plastic. Its object-side surface 161 is concave near the optical axis, and its image-side surface 162 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 161 has two inflection points, and its image-side surface 162 has three inflection points.

[0187] The seventh lens 170 has negative refractive power and is made of plastic. Its object-side surface 171 is convex near the optical axis, and its image-side surface 172 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 171 has three inflection points, and its image-side surface 172 has two inflection points. Its object-side surface 171 has at least one critical point off-axis, and its image-side surface 172 has at least one critical point off-axis.

[0188] The eighth lens 180 has positive refractive power and is made of plastic. Its object-side surface 181 is convex near the optical axis, and its image-side surface 182 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 181 has two inflection points, and its image-side surface 182 has two inflection points. Its object-side surface 181 has at least one critical point off-axis, and its image-side surface 182 has at least one critical point off-axis.

[0189] The ninth lens 190 has negative refractive power and is made of plastic. Its object-side surface 191 is concave near the optical axis, and its image-side surface 192 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 191 has two inflection points, and its image-side surface 192 has three inflection points. Its object-side surface 191 has at least one critical point off-axis, and its image-side surface 192 has at least one critical point off-axis.

[0190] The filter element 193 is made of glass and is located between the aperture stop 101 and the imaging surface 196, without affecting the focal length of the optical lens group used for image acquisition.

[0191] The equations for the aspherical surfaces of the above lenses are expressed as follows:

[0192]

[0193] X: The displacement parallel to the optical axis from the intersection of the aspherical surface and the optical axis to a point on the aspherical surface at a distance Y from the optical axis;

[0194] Y: The perpendicular distance between a point on the aspherical curve and the optical axis;

[0195] R: Radius of curvature;

[0196] k: cone coefficient; and

[0197] Ai: The i-th order aspherical coefficient.

[0198] In the first embodiment, the focal length of the imaging optical lens group is f, the aperture value (F-number) of the imaging optical lens group is Fno, and half of the maximum angle of view in the imaging optical lens group is HFOV, with the following values: f = 6.74 mm, Fno = 1.86, HFOV = 41.3 degrees.

[0199] The Abbe number of the sixth lens 160 is V6, which satisfies the following condition: V6 = 39.5.

[0200] The Abbe number of the seventh lens 170 is V7, which satisfies the following condition: V7 = 36.1.

[0201] The minimum Abbe number among all lenses in the image-taking optical lens group is Vmin, which satisfies the following condition: Vmin = 18.4. In this embodiment, among the first lens 110 to the ninth lens 190, the Abbe number of the third lens 130 is less than the Abbe number of the other lenses, therefore Vmin is equal to the Abbe number of the third lens 130.

[0202] The maximum refractive index of all lenses in the imaging optical lens group is Nmax, which satisfies the following condition: Nmax = 1.686. In this embodiment, among the first lens 110 to the ninth lens 190, the refractive index of the third lens 130 is greater than that of the other lenses, therefore Nmax is equal to the refractive index of the third lens 130.

[0203] The Abbe number of the first lens 110 is V1, the Abbe number of the second lens 120 is V2, the Abbe number of the third lens 130 is V3, the Abbe number of the fourth lens 140 is V4, the Abbe number of the fifth lens 150 is V5, the Abbe number of the sixth lens 160 is V6, the Abbe number of the seventh lens 170 is V7, the Abbe number of the eighth lens 180 is V8, the Abbe number of the ninth lens 190 is V9, and the Abbe number of the i-th lens is Vi. The refractive index of the first lens 110 is N1, the refractive index of the second lens 120 is N2, the refractive index of the third lens 130 is N3, the refractive index of the fourth lens 140 is N4, the refractive index of the fifth lens 150 is N5, and the refractive index of the sixth lens 160 is N6. The refractive index of the seventh lens 170 is N7, the refractive index of the eighth lens 180 is N8, the refractive index of the ninth lens 190 is N9, the refractive index of the i-th lens is Ni, and the minimum value of Vi / Ni is (Vi / Ni)min, which satisfies the following conditions: V1 / N1 = 36.31; V2 / N2 = 11.94; V3 / N3 = 10.91; V4 / N4 = 36.27; V5 / N5 = 36.27; V6 / N6 = 25.30; V7 / N7 = 22.91; V8 / N8 = 35.53; V9 / N9 = 36.27; and (Vi / Ni)min = 10.91, where i = 1, 2, 3, 4, 5, 6, 7, 8 or 9. In this embodiment, among the first lens 110 to the ninth lens 190, the ratio of the Abbe number to the refractive index of the third lens 130 is less than the ratio of the Abbe number to the refractive index of the other lenses. Therefore, (Vi / Ni)min is equal to the ratio of the Abbe number to the refractive index of the third lens 130.

[0204] The Abbe number of the first lens 110 is V1, the Abbe number of the second lens 120 is V2, and the Abbe number of the third lens 130 is V3, which satisfy the following condition: (V2+V3) / V1=0.68.

[0205] The maximum thickness along the optical axis of all lenses in the imaging optical lens group is CTmax, and the minimum thickness along the optical axis of all lenses in the imaging optical lens group is CTmin, which satisfies the following condition: CTmax / CTmin = 3.87. In this embodiment, among the first lens 110 to the ninth lens 190, the thickness along the optical axis of the first lens 110 is greater than the thickness along the optical axis of the other lenses, therefore CTmax is equal to the thickness along the optical axis of the first lens 110; the thickness along the optical axis of the second lens 120 is less than the thickness along the optical axis of the other lenses, therefore CTmin is equal to the thickness along the optical axis of the second lens 120.

[0206] The sum of the thicknesses of all lenses in the imaging optical lens group along the optical axis is ΣCT, and the sum of the distances between all adjacent lenses in the imaging optical lens group along the optical axis is ΣAT, which satisfies the following condition: ΣCT / ΣAT=1.68. In this embodiment, ΣCT is the sum of the thicknesses of 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 eighth lens 180, and the ninth lens 190 along the optical axis; ΣAT is the sum of the distances between any two adjacent lenses among 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 eighth lens 180, and the ninth lens 190 along the optical axis; furthermore, the distance between two adjacent lenses along the optical axis refers to the distance between two adjacent mirror surfaces of two adjacent lenses along the optical axis.

[0207] The sum of the distances between all adjacent lenses on the optical axis in the imaging optical lens group is ΣAT, the distance between the second lens 120 and the third lens 130 on the optical axis is T23, and the distance between the eighth lens 180 and the ninth lens 190 on the optical axis is T89. They satisfy the following condition: ΣAT / (T23+T89)=1.84.

[0208] The maximum imaging height of the imaging optical lens group is ImgH, and the maximum thickness of all lenses in the imaging optical lens group along the optical axis is CTmax, which satisfies the following condition: ImgH / CTmax=6.34.

[0209] An air lens ALE is located between the eighth lens 180 and the ninth lens 190. The radius of curvature of the object-side surface of the air lens is Rao, and the radius of curvature of the image-side surface of the air lens is Rai. They satisfy the following condition: (Rao+Rai) / (Rao-Rai)=0.16.

[0210] The radius of curvature of the object-side surface 191 of the ninth lens is R17, and the radius of curvature of the image-side surface 192 of the ninth lens is R18, which satisfies the following condition: (R17+R18) / (R17-R18)=0.17.

[0211] The radius of curvature of the object-side surface 191 of the ninth lens is R17, and the radius of curvature of the image-side surface 192 of the ninth lens is R18, which satisfies the following condition: |R17 / R18|=1.40.

[0212] The focal length of the optical lens group used for image acquisition is f, and the focal length of the first lens 110 is f1, which satisfies the following condition: f / f1=1.28.

[0213] The focal length of the optical lens group used for image acquisition is f, and the focal length of the eighth lens 180 is f8, which satisfies the following condition: f / f8=0.90.

[0214] The refractive power of the first lens 110 is P1, the refractive power of the second lens 120 is P2, the refractive power of the third lens 130 is P3, the refractive power of the fourth lens 140 is P4, the refractive power of the fifth lens 150 is P5, the refractive power of the sixth lens 160 is P6, the refractive power of the seventh lens 170 is P7, the refractive power of the eighth lens 180 is P8, and the refractive power of the ninth lens 190 is P9. They satisfy the following condition: (|P2|+|P3|+|P4|+|P5|+|P6|+|P7|) / (|P1|+|P8|+|P9|)=0.49.

[0215] The distance on the optical axis from the object-side surface 111 of the first lens to the image-side surface 192 of the ninth lens is TD, the distance on the optical axis from the image-side surface 192 of the ninth lens to the imaging plane 196 is BL, and the maximum imaging height of the optical lens group for image acquisition is ImgH, which satisfies the following condition: (TD×BL) / (ImgH×ImgH)=0.18.

[0216] The distance on the optical axis from the image-side surface 192 of the ninth lens to the imaging plane 196 is BL, and the distance on the optical axis from the object-side surface 111 of the first lens to the image-side surface 192 of the ninth lens is TD, which satisfies the following condition: BL / TD = 0.15.

[0217] The maximum imaging height of the optical lens group used for image acquisition is ImgH, and the distance on the optical axis from the image-side surface 192 of the ninth lens to the imaging plane 196 is BL, which satisfies the following condition: ImgH / BL=6.03.

[0218] The entrance pupil diameter of the optical lens group used for image acquisition is EPD, and the distance on the optical axis from the image-side surface 192 of the ninth lens to the imaging plane 196 is BL, which satisfies the following condition: EPD / BL=3.56.

[0219] The focal length of the imaging optical lens group is f, and the entrance pupil diameter of the imaging optical lens group is EPD, which satisfies the following condition: f / EPD=1.86.

[0220] The maximum effective radius of the object-side surface 131 of the third lens is Y31, and the maximum effective radius of the image-side surface 192 of the ninth lens is Y92, which satisfies the following condition: Y92 / Y31=3.29.

[0221] The vertical distance between the critical point of the image-side surface 172 of the seventh lens and the optical axis is Yc72. The focal length of the optical lens group used for image acquisition is f, which satisfies the following condition: Yc72 / f=0.19.

[0222] The vertical distance between the critical point of the image-side surface 182 of the eighth lens and the optical axis is Yc82. The focal length of the optical lens group used for image acquisition is f, which satisfies the following condition: Yc82 / f=0.23.

[0223] The vertical distance between the critical point of the image-side surface 192 of the ninth lens and the optical axis is Yc92. The focal length of the optical lens group used for image acquisition is f, which satisfies the following condition: Yc92 / f=0.20.

[0224] The distance from aperture 100 to imaging plane 196 on the optical axis is SL, and the distance from the object-side surface 111 of the first lens to imaging plane 196 on the optical axis is TL, which satisfies the following condition: SL / TL = 0.90.

[0225] The distance on the optical axis from the object-side surface 111 of the first lens to the imaging surface 196 is TL, and the focal length of the optical lens group for image acquisition is f, which satisfies the following condition: TL / f = 1.16.

[0226] The distance on the optical axis from the object-side surface 111 of the first lens to the imaging surface 196 is TL, and the maximum imaging height of the optical lens group for image acquisition is ImgH, which satisfies the following condition: TL / ImgH=1.28.

[0227] The maximum imaging height of the optical lens group used for image acquisition is ImgH, which satisfies the following condition: ImgH = 6.13 [mm].

[0228] The distance on the optical axis from the object-side surface 111 of the first lens to the imaging surface 196 is TL, which satisfies the following condition: TL = 7.82 mm.

[0229] The focal length of the optical lens group used for image acquisition is f. The radius of curvature of the object-side surface 111 of the first lens is R1, the radius of curvature of the image-side surface 112 of the first lens is R2, the radius of curvature of the object-side surface 121 of the second lens is R3, the radius of curvature of the image-side surface 122 of the second lens is R4, the radius of curvature of the object-side surface 131 of the third lens is R5, the radius of curvature of the image-side surface 132 of the third lens is R6, and the radius of curvature of the object-side surface 141 of the fourth lens is R7. The radius of curvature of surface 142 is R8; the radius of curvature of the object-side surface 151 of the fifth lens is R9; the radius of curvature of the image-side surface 152 of the fifth lens is R10; the radius of curvature of the object-side surface 161 of the sixth lens is R11; the radius of curvature of the image-side surface 162 of the sixth lens is R12; the radius of curvature of the object-side surface 171 of the seventh lens is R13; the radius of curvature of the image-side surface 172 of the seventh lens is R14; the radius of curvature of the object-side surface 181 of the eighth lens is R15 ...51 of the seventh lens is R9; the radius of curvature of the image-side surface 152 of the fifth lens is R10; the radius of curvature of the object-side surface 161 of the sixth lens is R11; the radius of curvature of the image-side surface 162 of the sixth lens is R12; the radius of curvature of the object-side surface 171 of the seventh lens is R13; the radius of curvature of the image-side surface 172 of the seventh lens is R14; the radius of curvature of the object-side surface 181 of the eighth lens is R15; the radius of curvature of the object-side surface 181 of the eighth lens is R15; the radius of curvature of the object-side surface 181 of the eighth lens is R15; the radius of curvature of the object-side surface 181 of the eighth lens is R The radius of curvature of the image-side surface 182 of the ninth lens is R16, the radius of curvature of the object-side surface 191 of the ninth lens is R17, the radius of curvature of the image-side surface 192 of the ninth lens is R18, the radius of curvature of the object-side surface of any lens is Ro, and the radius of curvature of the image-side surface of any lens is Ri, which satisfy the following conditions: |f / R1|+|f / R2|=3.16; |f / R3|+|f / R4|=1.96; |f / R5|+|f / R6|=0.94 |f / R7|+|f / R8|=0.28; |f / R9|+|f / R10|=0.91; |f / R11|+|f / R12|=0.74; |f / R13|+|f / R14|=2.08; |f / R15|+|f / R16|=3.04; and |f / R17|+|f / R18|=2.39, where the fourth lens 140 satisfies the following condition: |f / Ro|+|f / Ri|<0.50.

[0230] Please refer to Table 1 and Table 2 below.

[0231]

[0232]

[0233]

[0234]

[0235] Table 1 is... Figure 1The first embodiment provides detailed structural data, where the units for radius of curvature, thickness, and focal length are millimeters (mm), and surfaces 0 to 23 sequentially represent surfaces from the object side to the image side. Table 2 shows the aspherical data in the first embodiment, where k is the cone coefficient in the aspherical curve equation, and A4 to A20 represent the 4th to 20th order aspherical coefficients of each surface. Furthermore, the tables for the following embodiments are corresponding schematic diagrams and aberration curves for 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.

[0236] <Second Embodiment>

[0237] Please refer to Figures 3 to 4 ,in Figure 3 A schematic diagram of an image-capturing device according to a second embodiment of the present invention is shown. Figure 4 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the second embodiment. Figure 3 As can be seen, the image capturing device includes an image capturing optical lens group (not otherwise labeled) and an electronic photosensitive element 299. The image capturing optical lens group, arranged sequentially from the object side to the image side along the optical path, includes a first lens 210, an aperture 200, a second lens 220, a third lens 230, a fourth lens 240, an aperture stop 201, a fifth lens 250, a sixth lens 260, a seventh lens 270, an eighth lens 280, a ninth lens 290, a filter element 293, and an imaging surface 296. The image capturing optical lens group is configured with a first lens group (first lens 210, second lens 220, and third lens 230), a second lens group (fourth lens 240, fifth lens 250, and sixth lens 260), and a third lens group (seventh lens 270, eighth lens 280, and ninth lens 290). The electronic photosensitive element 299 is disposed on the imaging surface 296. The image-taking optical lens group consists of nine lenses (210, 220, 230, 240, 250, 260, 270, 280, 290), and there are no other interposed lenses between each lens.

[0238] The first lens 210 has positive refractive power and is made of plastic. Its object-side surface 211 is convex near the optical axis, and its image-side surface 212 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 211 has a point of inflection, and its image-side surface 212 has a point of inflection.

[0239] The second lens 220 has negative refractive power and is made of plastic. Its object-side surface 221 is convex near the optical axis, and its image-side surface 222 is concave near the optical axis. Both of its surfaces are aspherical.

[0240] The third lens 230 has positive refractive power and is made of plastic. Its object-side surface 231 is convex near the optical axis, and its image-side surface 232 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 231 has one inflection point, and its image-side surface 232 has two inflection points.

[0241] The fourth lens 240 has negative refractive power and is made of plastic. Its object-side surface 241 is concave near the optical axis, and its image-side surface 242 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 241 has three inflection points, and its image-side surface 242 has two inflection points.

[0242] The fifth lens 250 has positive refractive power and is made of plastic. Its object-side surface 251 is convex near the optical axis, and its image-side surface 252 is convex near the optical axis. Both surfaces are aspherical. Its object-side surface 251 has three inflection points, and its image-side surface 252 has two inflection points.

[0243] The sixth lens 260 has negative refractive power and is made of plastic. Its object-side surface 261 is concave near the optical axis, and its image-side surface 262 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 261 has two inflection points, and its image-side surface 262 has three inflection points.

[0244] The seventh lens 270 has negative refractive power and is made of plastic. Its object-side surface 271 is convex near the optical axis, and its image-side surface 272 is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface 271 has three inflection points, and its image-side surface 272 has three inflection points. Its object-side surface 271 has at least one critical point off-axis, and its image-side surface 272 has at least one critical point off-axis.

[0245] The eighth lens 280 has positive refractive power and is made of plastic. Its object-side surface 281 is convex near the optical axis, and its image-side surface 282 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 281 has two inflection points, and its image-side surface 282 has two inflection points. Its object-side surface 281 has at least one critical point off-axis, and its image-side surface 282 has at least one critical point off-axis.

[0246] The ninth lens 290 has negative refractive power and is made of plastic. Its object-side surface 291 is concave near the optical axis, and its image-side surface 292 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 291 has two inflection points, and its image-side surface 292 has three inflection points. Its object-side surface 291 has at least one critical point off-axis, and its image-side surface 292 has at least one critical point off-axis.

[0247] The filter element 293 is made of glass and is located between the ninth lens 290 and the imaging surface 296. It does not affect the focal length of the optical lens group used for image acquisition.

[0248] Please refer to Table 3 and Table 4 below.

[0249]

[0250]

[0251]

[0252]

[0253] In the second embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in the table below are the same as in the first embodiment and will not be repeated here.

[0254]

[0255]

[0256] <Third Embodiment>

[0257] Please refer to Figures 5 to 6 ,in Figure 5 A schematic diagram of an image-capturing device according to a third embodiment of the present invention is shown. Figure 6 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the third embodiment. Figure 5 As can be seen, the image capturing device includes an image capturing optical lens group (unlabeled) and an electronic photosensitive element 399. The image capturing optical lens group, arranged sequentially from the object side to the image side along the optical path, includes an aperture 300, a first lens 310, a second lens 320, a third lens 330, an aperture stop 301, a fourth lens 340, a fifth lens 350, a sixth lens 360, a seventh lens 370, an eighth lens 380, a ninth lens 390, a filter element 393, and an imaging surface 396. The image capturing optical lens group is configured with a first lens group (first lens 310, second lens 320, and third lens 330), a second lens group (fourth lens 340, fifth lens 350, and sixth lens 360), and a third lens group (seventh lens 370, eighth lens 380, and ninth lens 390). The electronic photosensitive element 399 is disposed on the imaging surface 396. The image-taking optical lens group consists of nine lenses (310, 320, 330, 340, 350, 360, 370, 380, 390), and there are no other interposed lenses between each lens.

[0258] The first lens 310 has positive refractive power and is made of plastic. Its object-side surface 311 is convex near the optical axis, and its image-side surface 312 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 311 has a point of inflection, and its image-side surface 312 has a point of inflection.

[0259] The second lens 320 has negative refractive power and is made of plastic. Its object-side surface 321 is convex near the optical axis, and its image-side surface 322 is concave near the optical axis. Both of its surfaces are aspherical.

[0260] The third lens 330 has negative refractive power and is made of plastic. Its object-side surface 331 is convex near the optical axis, and its image-side surface 332 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 331 has one inflection point, and its image-side surface 332 has two inflection points.

[0261] The fourth lens 340 has negative refractive power and is made of plastic. Its object-side surface 341 is convex near the optical axis, and its image-side surface 342 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 341 has three inflection points, and its image-side surface 342 has three inflection points.

[0262] The fifth lens 350 has positive refractive power and is made of plastic. Its object-side surface 351 is convex near the optical axis, and its image-side surface 352 is convex near the optical axis. Both surfaces are aspherical. Its object-side surface 351 has three inflection points, and its image-side surface 352 has two inflection points.

[0263] The sixth lens 360 has negative refractive power and is made of plastic. Its object-side surface 361 is concave near the optical axis, and its image-side surface 362 is convex near the optical axis. Both surfaces are aspherical. Its object-side surface 361 has two inflection points, and its image-side surface 362 has two inflection points.

[0264] The seventh lens 370 has negative refractive power and is made of plastic. Its object-side surface 371 is convex near the optical axis, and its image-side surface 372 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 371 has three inflection points, and its image-side surface 372 has five inflection points. Its object-side surface 371 has at least one critical point off-axis, and its image-side surface 372 has at least one critical point off-axis.

[0265] The eighth lens 380 has positive refractive power and is made of plastic. Its object-side surface 381 is convex near the optical axis, and its image-side surface 382 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 381 has two inflection points, and its image-side surface 382 has two inflection points. Its object-side surface 381 has at least one critical point off-axis, and its image-side surface 382 has at least one critical point off-axis.

[0266] The ninth lens 390 has negative refractive power and is made of plastic. Its object-side surface 391 is concave near the optical axis, and its image-side surface 392 is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface 391 has three inflection points, and its image-side surface 392 has three inflection points. Its object-side surface 391 has at least one critical point off-axis, and its image-side surface 392 has at least one critical point off-axis.

[0267] The filter element 393 is made of glass and is located between the ninth lens 390 and the imaging surface 396. It does not affect the focal length of the optical lens group used for image acquisition.

[0268] Please refer to Table 5 and Table 6 below.

[0269]

[0270]

[0271]

[0272]

[0273] In the third embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in the table below are the same as in the first embodiment and will not be repeated here.

[0274]

[0275]

[0276] <Fourth Embodiment>

[0277] Please refer to Figures 7 to 8 ,in Figure 7 A schematic diagram of an image-capturing device according to a fourth embodiment of the present invention is shown. Figure 8 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the fourth embodiment. Figure 7As can be seen, the image capturing device includes an image capturing optical lens group (not otherwise labeled) and an electronic photosensitive element 499. The image capturing optical lens group, arranged sequentially from the object side to the image side along the optical path, includes an aperture 400, 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 eighth lens 480, a ninth lens 490, an aperture stop 401, a filter element 493, and an imaging surface 496. The image capturing optical lens group is configured with a first lens group (first lens 410, second lens 420, and third lens 430), a second lens group (fourth lens 440, fifth lens 450, and sixth lens 460), and a third lens group (seventh lens 470, eighth lens 480, and ninth lens 490). The electronic photosensitive element 499 is disposed on the imaging surface 496. The image-taking optical lens group consists of nine lenses (410, 420, 430, 440, 450, 460, 470, 480, 490), and there are no other interposed lenses between each lens.

[0278] The first lens 410 has positive refractive power and is made of plastic. Its object-side surface 411 is convex near the optical axis, and its image-side surface 412 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 411 has a point of inflection, and its image-side surface 412 has a point of inflection.

[0279] The second lens 420 has negative refractive power and is made of plastic. Its object-side surface 421 is convex near the optical axis, and its image-side surface 422 is concave near the optical axis. Both of its surfaces are aspherical.

[0280] The third lens 430 has negative refractive power and is made of plastic. Its object-side surface 431 is convex near the optical axis, and its image-side surface 432 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 431 has one inflection point, and its image-side surface 432 has two inflection points.

[0281] The fourth lens 440 has positive refractive power and is made of plastic. Its object-side surface 441 is concave near the optical axis, and its image-side surface 442 is convex near the optical axis. Both surfaces are aspherical. Its object-side surface 441 has three inflection points, and its image-side surface 442 has one inflection point.

[0282] The fifth lens 450 has positive refractive power and is made of plastic. Its object-side surface 451 is concave near the optical axis, and its image-side surface 452 is convex near the optical axis. Both surfaces are aspherical. Its object-side surface 451 has two inflection points, and its image-side surface 452 has two inflection points.

[0283] The sixth lens 460 has negative refractive power and is made of plastic. Its object-side surface 461 is concave near the optical axis, and its image-side surface 462 is convex near the optical axis. Both surfaces are aspherical. Its object-side surface 461 has one inflection point, and its image-side surface 462 has two inflection points.

[0284] The seventh lens 470 has negative refractive power and is made of plastic. Its object-side surface 471 is convex near the optical axis, and its image-side surface 472 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 471 has two inflection points, and its image-side surface 472 has one inflection point. Its object-side surface 471 has at least one critical point off-axis, and its image-side surface 472 has at least one critical point off-axis.

[0285] The eighth lens 480 has positive refractive power and is made of plastic. Its object-side surface 481 is convex near the optical axis, and its image-side surface 482 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 481 has two inflection points, and its image-side surface 482 has two inflection points. Its object-side surface 481 has at least one critical point off-axis, and its image-side surface 482 has at least one critical point off-axis.

[0286] The ninth lens 490 has negative refractive power and is made of plastic. Its object-side surface 491 is concave near the optical axis, and its image-side surface 492 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 491 has three inflection points, its image-side surface 492 has three inflection points, and its image-side surface 492 has at least one critical point off-axis.

[0287] The filter element 493 is made of glass and is located between the aperture stop 401 and the imaging surface 496. It does not affect the focal length of the optical lens group used for image acquisition.

[0288] Please refer to Tables 7 and 8 below.

[0289]

[0290]

[0291]

[0292]

[0293] In the fourth embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in the table below are the same as in the first embodiment and will not be repeated here.

[0294]

[0295]

[0296] <Fifth Embodiment>

[0297] Please refer to Figures 9 to 10 ,in Figure 9 A schematic diagram of an image-capturing device according to a fifth embodiment of the present invention is shown. Figure 10 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the fifth embodiment. Figure 9 As can be seen, the image capturing device includes an image capturing optical lens group (unlabeled) and an electronic photosensitive element 599. The image capturing optical lens group, arranged sequentially from the object side to the image side along the optical path, includes an aperture 500, 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 eighth lens 580, a ninth lens 590, an aperture stop 501, a filter element 593, and an imaging surface 596. The image capturing optical lens group is configured with a first lens group (first lens 510, second lens 520, and third lens 530), a second lens group (fourth lens 540, fifth lens 550, and sixth lens 560), and a third lens group (seventh lens 570, eighth lens 580, and ninth lens 590). The electronic photosensitive element 599 is disposed on the imaging surface 596. The image-capturing optical lens group comprises nine lenses (510, 520, 530, 540, 550, 560, 570, 580, 590), and there are no other interposed lenses between each lens.

[0298] The first lens 510 has positive refractive power and is made of plastic. Its object-side surface 511 is convex near the optical axis, and its image-side surface 512 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 511 has a point of inflection, and its image-side surface 512 has a point of inflection.

[0299] The second lens 520 has negative refractive power and is made of plastic. Its object-side surface 521 is convex near the optical axis, and its image-side surface 522 is concave near the optical axis. Both of its surfaces are aspherical.

[0300] The third lens 530 has negative refractive power and is made of plastic. Its object-side surface 531 is convex near the optical axis, and its image-side surface 532 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 531 has one inflection point, and its image-side surface 532 has two inflection points.

[0301] The fourth lens 540 has positive refractive power and is made of plastic. Its object-side surface 541 is concave near the optical axis, and its image-side surface 542 is convex near the optical axis. Both surfaces are aspherical. Its object-side surface 541 has a point of inflection, and its image-side surface 542 has a point of inflection.

[0302] The fifth lens 550 has positive refractive power and is made of plastic. Its object-side surface 551 is concave near the optical axis, and its image-side surface 552 is convex near the optical axis. Both surfaces are aspherical. Its object-side surface 551 has two inflection points, and its image-side surface 552 has two inflection points.

[0303] The sixth lens 560 has negative refractive power and is made of plastic. Its object-side surface 561 is concave near the optical axis, and its image-side surface 562 is convex near the optical axis. Both surfaces are aspherical. Its object-side surface 561 has a point of inflection, and its image-side surface 562 has a point of inflection.

[0304] The seventh lens 570 has negative refractive power and is made of plastic. Its object-side surface 571 is convex near the optical axis, and its image-side surface 572 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 571 has two inflection points, and its image-side surface 572 has one inflection point. Its object-side surface 571 has at least one critical point off-axis, and its image-side surface 572 has at least one critical point off-axis.

[0305] The eighth lens 580 has positive refractive power and is made of plastic. Its object-side surface 581 is convex near the optical axis, and its image-side surface 582 is convex near the optical axis. Both surfaces are aspherical. Its object-side surface 581 has two inflection points, its image-side surface 582 has one inflection point, and its object-side surface 581 has at least one critical point off-axis.

[0306] The ninth lens 590 has negative refractive power and is made of plastic. Its object-side surface 591 is concave near the optical axis, and its image-side surface 592 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 591 has two inflection points, and its image-side surface 592 has three inflection points. Its object-side surface 591 has at least one critical point off-axis, and its image-side surface 592 has at least one critical point off-axis.

[0307] The filter element 593 is made of glass and is located between the aperture stop 501 and the imaging surface 596. It does not affect the focal length of the optical lens group used for image acquisition.

[0308] Please refer to Tables 9 and 10 below.

[0309]

[0310]

[0311]

[0312]

[0313] In the fifth embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in the table below are the same as in the first embodiment and will not be repeated here.

[0314]

[0315]

[0316] <Sixth Embodiment>

[0317] Please refer to Figures 11 to 12 ,in Figure 11 A schematic diagram of an image-capturing device according to a sixth embodiment of the present invention is shown. Figure 12 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the sixth embodiment. Figure 11 As can be seen, the image capturing device includes an image capturing optical lens group (unlabeled) and an electronic photosensitive element 699. The image capturing optical lens group, arranged sequentially from the object side to the image side along the optical path, includes an aperture 600, 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 eighth lens 680, a ninth lens 690, an aperture stop 601, a filter element 693, and an imaging surface 696. The image capturing optical lens group is configured with a first lens group (first lens 610, second lens 620, and third lens 630), a second lens group (fourth lens 640, fifth lens 650, and sixth lens 660), and a third lens group (seventh lens 670, eighth lens 680, and ninth lens 690). The electronic photosensitive element 699 is disposed on the imaging surface 696. The image-capturing optical lens group comprises nine lenses (610, 620, 630, 640, 650, 660, 670, 680, 690), and there are no other interposed lenses between each lens.

[0318] The first lens 610 has positive refractive power and is made of plastic. Its object-side surface 611 is convex near the optical axis, and its image-side surface 612 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 611 has a point of inflection, and its image-side surface 612 has a point of inflection.

[0319] The second lens 620 has negative refractive power and is made of plastic. Its object-side surface 621 is convex near the optical axis, and its image-side surface 622 is concave near the optical axis. Both of its surfaces are aspherical.

[0320] The third lens 630 has negative refractive power and is made of plastic. Its object-side surface 631 is convex near the optical axis, and its image-side surface 632 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 631 has one inflection point, and its image-side surface 632 has two inflection points.

[0321] The fourth lens 640 has positive refractive power and is made of plastic. Its object-side surface 641 is concave near the optical axis, and its image-side surface 642 is convex near the optical axis. Both surfaces are aspherical. Its object-side surface 641 has three inflection points, and its image-side surface 642 has one inflection point.

[0322] The fifth lens 650 has positive refractive power and is made of plastic. Its object-side surface 651 is convex near the optical axis, and its image-side surface 652 is convex near the optical axis. Both surfaces are aspherical, and its object-side surface 651 has three inflection points.

[0323] The sixth lens 660 has negative refractive power and is made of plastic. Its object-side surface 661 is concave near the optical axis, and its image-side surface 662 is concave near the optical axis. Both surfaces are aspherical, and its image-side surface 662 has three inflection points.

[0324] The seventh lens 670 has positive refractive power and is made of plastic. Its object-side surface 671 is convex near the optical axis, and its image-side surface 672 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 671 has two inflection points, and its image-side surface 672 has one inflection point. Its object-side surface 671 has at least one critical point off-axis, and its image-side surface 672 has at least one critical point off-axis.

[0325] The eighth lens 680 has positive refractive power and is made of plastic. Its object-side surface 681 is convex near the optical axis, and its image-side surface 682 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 681 has two inflection points, and its image-side surface 682 has two inflection points. Its object-side surface 681 has at least one critical point off-axis, and its image-side surface 682 has at least one critical point off-axis.

[0326] The ninth lens 690 has negative refractive power and is made of plastic. Its object-side surface 691 is concave near the optical axis, and its image-side surface 692 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 691 has two inflection points, and its image-side surface 692 has three inflection points. Its object-side surface 691 has at least one critical point off-axis, and its image-side surface 692 has at least one critical point off-axis.

[0327] The filter element 693 is made of glass and is located between the aperture stop 601 and the imaging surface 696. It does not affect the focal length of the optical lens group used for image acquisition.

[0328] Please refer to Table 11 and Table 12 below.

[0329]

[0330]

[0331]

[0332] In the sixth embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in the table below are the same as in the first embodiment and will not be repeated here.

[0333]

[0334]

[0335] <Seventh Embodiment>

[0336] Please refer to Figures 13 to 14 ,in Figure 13 A schematic diagram of an image-capturing device according to a seventh embodiment of the present invention is shown. Figure 14 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the seventh embodiment. Figure 13 As can be seen, the image capturing device includes an image capturing optical lens group (unlabeled) and an electronic photosensitive element 799. The image capturing optical lens group, arranged sequentially from the object side to the image side along the optical path, includes an aperture 700, a first lens 710, a second lens 720, a third lens 730, an aperture stop 701, a fourth lens 740, a fifth lens 750, a sixth lens 760, a seventh lens 770, an eighth lens 780, a ninth lens 790, a filter element 793, and an imaging surface 796. The image capturing optical lens group is configured with a first lens group (first lens 710, second lens 720, and third lens 730), a second lens group (fourth lens 740, fifth lens 750, and sixth lens 760), and a third lens group (seventh lens 770, eighth lens 780, and ninth lens 790). The electronic photosensitive element 799 is disposed on the imaging surface 796. The image-taking optical lens group consists of nine lenses (710, 720, 730, 740, 750, 760, 770, 780, 790), and there are no other interposed lenses between each lens.

[0337] The first lens 710 has positive refractive power and is made of plastic. Its object-side surface 711 is convex near the optical axis, and its image-side surface 712 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 711 has a point of inflection, and its image-side surface 712 has a point of inflection.

[0338] The second lens 720 has negative refractive power and is made of plastic. Its object-side surface 721 is convex near the optical axis, and its image-side surface 722 is concave near the optical axis. Both of its surfaces are aspherical.

[0339] The third lens 730 has negative refractive power and is made of plastic. Its object-side surface 731 is concave near the optical axis, and its image-side surface 732 is concave near the optical axis. Both surfaces are aspherical, and its image-side surface 732 has two inflection points.

[0340] The fourth lens 740 has positive refractive power and is made of plastic. Its object-side surface 741 is convex near the optical axis, and its image-side surface 742 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 741 has two inflection points, and its image-side surface 742 has two inflection points.

[0341] The fifth lens 750 has positive refractive power and is made of plastic. Its object-side surface 751 is convex near the optical axis, and its image-side surface 752 is convex near the optical axis. Both surfaces are aspherical, and its object-side surface 751 has three inflection points.

[0342] The sixth lens 760 has negative refractive power and is made of plastic. Its object-side surface 761 is concave near the optical axis, and its image-side surface 762 is convex near the optical axis. Both surfaces are aspherical, and its image-side surface 762 has a point of inflection.

[0343] The seventh lens 770 has negative refractive power and is made of plastic. Its object-side surface 771 is convex near the optical axis, and its image-side surface 772 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 771 has two inflection points, and its image-side surface 772 has one inflection point. Its object-side surface 771 has at least one critical point off-axis, and its image-side surface 772 has at least one critical point off-axis.

[0344] The eighth lens 780 has positive refractive power and is made of plastic. Its object-side surface 781 is convex near the optical axis, and its image-side surface 782 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 781 has two inflection points, and its image-side surface 782 has two inflection points. Its object-side surface 781 has at least one critical point off-axis, and its image-side surface 782 has at least one critical point off-axis.

[0345] The ninth lens 790 has negative refractive power and is made of plastic. Its object-side surface 791 is concave near the optical axis, and its image-side surface 792 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 791 has one inflection point, its image-side surface 792 has two inflection points, and its image-side surface 792 has at least one critical point off-axis.

[0346] The filter element 793 is made of glass and is located between the ninth lens 790 and the imaging surface 796. It does not affect the focal length of the optical lens group used for image acquisition.

[0347] Please refer to Tables 13 and 14 below.

[0348]

[0349]

[0350]

[0351]

[0352] In the seventh embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in the table below are the same as in the first embodiment and will not be repeated here.

[0353]

[0354] <Eighth Embodiment>

[0355] Please refer to Figures 15 to 16 ,in Figure 15 A schematic diagram of an image-capturing device according to an eighth embodiment of the present invention is shown. Figure 16 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the eighth embodiment. Figure 15 As can be seen, the image capturing device includes an image capturing optical lens group (not otherwise labeled) and an electronic photosensitive element 899. The image capturing optical lens group, arranged sequentially from the object side to the image side along the optical path, includes an aperture 800, a first lens 810, a second lens 820, a third lens 830, a fourth lens 840, an aperture stop 801, a fifth lens 850, a sixth lens 860, a seventh lens 870, an eighth lens 880, a ninth lens 890, a filter element 893, and an imaging surface 896. The image capturing optical lens group has a configuration of a first lens group (first lens 810, second lens 820, and third lens 830), a second lens group (fourth lens 840, fifth lens 850, and sixth lens 860), and a third lens group (seventh lens 870, eighth lens 880, and ninth lens 890). The electronic photosensitive element 899 is disposed on the imaging surface 896. The image-taking optical lens group consists of nine lenses (810, 820, 830, 840, 850, 860, 870, 880, 890), and there are no other interposed lenses between each lens.

[0356] The first lens 810 has positive refractive power and is made of plastic. Its object-side surface 811 is convex near the optical axis, and its image-side surface 812 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 811 has a point of inflection, and its image-side surface 812 has a point of inflection.

[0357] The second lens 820 has negative refractive power and is made of plastic. Its object-side surface 821 is convex near the optical axis, and its image-side surface 822 is concave near the optical axis. Both of its surfaces are aspherical.

[0358] The third lens 830 has negative refractive power and is made of plastic. Its object-side surface 831 is convex near the optical axis, and its image-side surface 832 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 831 has one inflection point, and its image-side surface 832 has two inflection points.

[0359] The fourth lens 840 has positive refractive power and is made of plastic. Its object-side surface 841 is concave near the optical axis, and its image-side surface 842 is convex near the optical axis. Both surfaces are aspherical. Its object-side surface 841 has a point of inflection, and its image-side surface 842 has a point of inflection.

[0360] The fifth lens 850 has positive refractive power and is made of plastic. Its object-side surface 851 is convex near the optical axis, and its image-side surface 852 is convex near the optical axis. Both surfaces are aspherical. Its object-side surface 851 has three inflection points, and its image-side surface 852 has two inflection points.

[0361] The sixth lens 860 has negative refractive power and is made of plastic. Its object-side surface 861 is concave near the optical axis, and its image-side surface 862 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 861 has four inflection points, and its image-side surface 862 has three inflection points.

[0362] The seventh lens 870 has negative refractive power and is made of plastic. Its object-side surface 871 is convex near the optical axis, and its image-side surface 872 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 871 has three inflection points, and its image-side surface 872 has two inflection points. Its object-side surface 871 has at least one critical point off-axis, and its image-side surface 872 has at least one critical point off-axis.

[0363] The eighth lens 880 has positive refractive power and is made of plastic. Its object-side surface 881 is convex near the optical axis, and its image-side surface 882 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 881 has two inflection points, and its image-side surface 882 has two inflection points. Its object-side surface 881 has at least one critical point off-axis, and its image-side surface 882 has at least one critical point off-axis.

[0364] The ninth lens 890 has negative refractive power and is made of plastic. Its object-side surface 891 is concave near the optical axis, and its image-side surface 892 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 891 has three inflection points, and its image-side surface 892 has three inflection points. Its object-side surface 891 has at least one critical point off-axis, and its image-side surface 892 has at least one critical point off-axis.

[0365] The filter element 893 is made of glass and is located between the ninth lens 890 and the imaging surface 896. It does not affect the focal length of the optical lens group used for image acquisition.

[0366] Please refer to Tables 15 and 16 below.

[0367]

[0368]

[0369]

[0370]

[0371] In the eighth embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in the table below are the same as in the first embodiment and will not be repeated here.

[0372]

[0373] <Ninth Embodiment>

[0374] Please refer to Figures 17 to 18 ,in Figure 17 A schematic diagram of an image-capturing device according to a ninth embodiment of the present invention is shown. Figure 18 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the ninth embodiment. Figure 17As can be seen, the image capturing device includes an image capturing optical lens group (unlabeled) and an electronic photosensitive element 999. The image capturing optical lens group, along the optical path from the object side to the image side, sequentially includes an aperture 900, a first lens 910, a second lens 920, a third lens 930, a fourth lens 940, a fifth lens 950, a sixth lens 960, an aperture stop 901, a seventh lens 970, an eighth lens 980, a ninth lens 990, a filter element 993, and an imaging surface 996. The image capturing optical lens group has a configuration of a first lens group (first lens 910, second lens 920, and third lens 930), a second lens group (fourth lens 940, fifth lens 950, and sixth lens 960), and a third lens group (seventh lens 970, eighth lens 980, and ninth lens 990). The electronic photosensitive element 999 is disposed on the imaging surface 996. The image-taking optical lens group consists of nine lenses (910, 920, 930, 940, 950, 960, 970, 980, 990), and there are no other interposed lenses between each lens.

[0375] The first lens 910 has positive refractive power and is made of plastic. Its object-side surface 911 is convex near the optical axis, and its image-side surface 912 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 911 has a point of inflection, and its image-side surface 912 has a point of inflection.

[0376] The second lens 920 has negative refractive power and is made of plastic. Its object-side surface 921 is convex near the optical axis, and its image-side surface 922 is concave near the optical axis. Both of its surfaces are aspherical.

[0377] The third lens 930 has negative refractive power and is made of plastic. Its object-side surface 931 is convex near the optical axis, and its image-side surface 932 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 931 has one inflection point, and its image-side surface 932 has two inflection points.

[0378] The fourth lens 940 has positive refractive power and is made of plastic. Its object-side surface 941 is convex near the optical axis, and its image-side surface 942 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 941 has two inflection points, and its image-side surface 942 has two inflection points.

[0379] The fifth lens 950 has positive refractive power and is made of plastic. Its object-side surface 951 is convex near the optical axis, and its image-side surface 952 is convex near the optical axis. Both surfaces are aspherical. Its object-side surface 951 has three inflection points, and its image-side surface 952 has two inflection points.

[0380] The sixth lens 960 has negative refractive power and is made of plastic. Its object-side surface 961 is concave near the optical axis, and its image-side surface 962 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 961 has four inflection points, and its image-side surface 962 has three inflection points.

[0381] The seventh lens 970 has negative refractive power and is made of plastic. Its object-side surface 971 is convex near the optical axis, and its image-side surface 972 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 971 has three inflection points, and its image-side surface 972 has one inflection point. Its object-side surface 971 has at least one critical point off-axis, and its image-side surface 972 has at least one critical point off-axis.

[0382] The eighth lens 980 has positive refractive power and is made of plastic. Its object-side surface 981 is convex near the optical axis, and its image-side surface 982 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 981 has two inflection points, and its image-side surface 982 has two inflection points. Its object-side surface 981 has at least one critical point off-axis, and its image-side surface 982 has at least one critical point off-axis.

[0383] The ninth lens 990 has negative refractive power and is made of plastic. Its object-side surface 991 is concave near the optical axis, and its image-side surface 992 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 991 has two inflection points, and its image-side surface 992 has three inflection points. Its object-side surface 991 has at least one critical point off-axis, and its image-side surface 992 has at least one critical point off-axis.

[0384] The filter element 993 is made of glass and is located between the ninth lens 990 and the imaging surface 996. It does not affect the focal length of the optical lens group used for image acquisition.

[0385] Please refer to Tables 17 and 18 below.

[0386]

[0387]

[0388]

[0389]

[0390] In the ninth embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in the table below are the same as in the first embodiment and will not be repeated here.

[0391]

[0392]

[0393] <Tenth Embodiment>

[0394] Please refer to Figures 19 to 20 ,in Figure 19 A schematic diagram of an image-capturing device according to a tenth embodiment of the present invention is shown. Figure 20 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the tenth embodiment. Figure 19 As can be seen, the image capturing device includes an image capturing optical lens group (unlabeled) and an electronic photosensitive element 1099. The image capturing optical lens group, arranged sequentially from the object side to the image side along the optical path, includes an aperture 1000, a first lens 1010, a second lens 1020, a third lens 1030, an aperture stop 1001, a fourth lens 1040, a fifth lens 1050, a sixth lens 1060, a seventh lens 1070, an eighth lens 1080, a ninth lens 1090, a filter element 1093, and an imaging plane 1096. The image capturing optical lens group is configured with a first lens group (first lens 1010, second lens 1020, and third lens 1030), a second lens group (fourth lens 1040, fifth lens 1050, and sixth lens 1060), and a third lens group (seventh lens 1070, eighth lens 1080, and ninth lens 1090). The electronic photosensitive element 1099 is disposed on the imaging surface 1096. The imaging optical lens group includes nine lenses (1010, 1020, 1030, 1040, 1050, 1060, 1070, 1080, 1090), and there are no other interposed lenses between each lens.

[0395] The first lens 1010 has positive refractive power and is made of plastic. Its object-side surface 1011 is convex near the optical axis, and its image-side surface 1012 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 1011 has a point of inflection, and its image-side surface 1012 has a point of inflection.

[0396] The second lens 1020 has negative refractive power and is made of plastic. Its object-side surface 1021 is convex near the optical axis, and its image-side surface 1022 is concave near the optical axis. Both of its surfaces are aspherical.

[0397] The third lens 1030 has negative refractive power and is made of plastic. Its object-side surface 1031 is convex near the optical axis, and its image-side surface 1032 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 1031 has one inflection point, and its image-side surface 1032 has two inflection points.

[0398] The fourth lens 1040 has positive refractive power and is made of plastic. Its object-side surface 1041 is convex near the optical axis, and its image-side surface 1042 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 1041 has two inflection points, and its image-side surface 1042 has three inflection points.

[0399] The fifth lens 1050 has positive refractive power and is made of plastic. Its object-side surface 1051 is convex near the optical axis, and its image-side surface 1052 is convex near the optical axis. Both surfaces are aspherical. Its object-side surface 1051 has three inflection points, and its image-side surface 1052 has two inflection points.

[0400] The sixth lens 1060 has negative refractive power and is made of plastic. Its object-side surface 1061 is concave near the optical axis, and its image-side surface 1062 is convex near the optical axis. Both surfaces are aspherical. Its object-side surface 1061 has one inflection point, and its image-side surface 1062 has two inflection points.

[0401] The seventh lens 1070 has negative refractive power and is made of plastic. Its object-side surface 1071 is convex near the optical axis, and its image-side surface 1072 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 1071 has three inflection points, and its image-side surface 1072 has two inflection points. Its object-side surface 1071 has at least one critical point off-axis, and its image-side surface 1072 has at least one critical point off-axis.

[0402] The eighth lens 1080 has positive refractive power and is made of plastic. Its object-side surface 1081 is convex near the optical axis, and its image-side surface 1082 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 1081 has three inflection points, and its image-side surface 1082 has three inflection points. Its object-side surface 1081 has at least one critical point off-axis, and its image-side surface 1082 has at least one critical point off-axis.

[0403] The ninth lens 1090 has negative refractive power and is made of plastic. Its object-side surface 1091 is concave near the optical axis, and its image-side surface 1092 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 1091 has three inflection points, and its image-side surface 1092 has four inflection points. Its object-side surface 1091 has at least one critical point off-axis, and its image-side surface 1092 has at least one critical point off-axis.

[0404] The filter element 1093 is made of glass and is located between the ninth lens 1090 and the imaging surface 1096. It does not affect the focal length of the optical lens group used for image acquisition.

[0405] Please refer to Tables 19 and 20 below.

[0406]

[0407]

[0408]

[0409]

[0410] In the tenth embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in the table below are the same as in the first embodiment and will not be repeated here.

[0411]

[0412]

[0413] <Eleventh Embodiment>

[0414] Please refer to Figures 21 to 22 ,in Figure 21 A schematic diagram of an image-capturing device according to the eleventh embodiment of the present invention is shown. Figure 22 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the eleventh embodiment. Figure 21 As can be seen, the image capturing device includes an image capturing optical lens group (unlabeled) and an electronic photosensitive element 1199. The image capturing optical lens group, arranged sequentially from the object side to the image side along the optical path, includes an aperture 1100, a first lens 1110, a second lens 1120, a third lens 1130, an aperture stop 1101, a fourth lens 1140, a fifth lens 1150, a sixth lens 1160, a seventh lens 1170, an eighth lens 1180, a ninth lens 1190, a filter element 1193, and an imaging plane 1196. The image capturing optical lens group is configured with a first lens group (first lens 1110, second lens 1120, and third lens 1130), a second lens group (fourth lens 1140, fifth lens 1150, and sixth lens 1160), and a third lens group (seventh lens 1170, eighth lens 1180, and ninth lens 1190). The electronic photosensitive element 1199 is disposed on the imaging surface 1196. The imaging optical lens group includes nine lenses (1110, 1120, 1130, 1140, 1150, 1160, 1170, 1180, 1190), and there are no other interposed lenses between each lens.

[0415] The first lens 1110 has positive refractive power and is made of glass. Its object-side surface 1111 is convex near the optical axis, and its image-side surface 1112 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 1111 has a point of inflection, and its image-side surface 1112 has a point of inflection.

[0416] The second lens 1120 has negative refractive power and is made of plastic. Its object-side surface 1121 is convex near the optical axis, and its image-side surface 1122 is concave near the optical axis. Both of its surfaces are aspherical.

[0417] The third lens 1130 has positive refractive power and is made of plastic. Its object-side surface 1131 is convex near the optical axis, and its image-side surface 1132 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 1131 has one inflection point, and its image-side surface 1132 has two inflection points.

[0418] The fourth lens 1140 has negative refractive power and is made of plastic. Its object-side surface 1141 is concave near the optical axis, and its image-side surface 1142 is convex near the optical axis. Both surfaces are aspherical. Its object-side surface 1141 has a point of inflection, and its image-side surface 1142 has a point of inflection.

[0419] The fifth lens 1150 has positive refractive power and is made of plastic. Its object-side surface 1151 is convex near the optical axis, and its image-side surface 1152 is convex near the optical axis. Both surfaces are aspherical, and its object-side surface 1151 has three inflection points.

[0420] The sixth lens 1160 has negative refractive power and is made of plastic. Its object-side surface 1161 is concave near the optical axis, and its image-side surface 1162 is concave near the optical axis. Both surfaces are aspherical, and its image-side surface 1162 has two inflection points.

[0421] The seventh lens 1170 has negative refractive power and is made of plastic. Its object-side surface 1171 is convex near the optical axis, and its image-side surface 1172 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 1171 has two inflection points, and its image-side surface 1172 has one inflection point. Its object-side surface 1171 has at least one critical point off-axis, and its image-side surface 1172 has at least one critical point off-axis.

[0422] The eighth lens 1180 has positive refractive power and is made of plastic. Its object-side surface 1181 is convex near the optical axis, and its image-side surface 1182 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 1181 has two inflection points, and its image-side surface 1182 has two inflection points. Its object-side surface 1181 has at least one critical point off-axis, and its image-side surface 1182 has at least one critical point off-axis.

[0423] The ninth lens 1190 has negative refractive power and is made of plastic. Its object-side surface 1191 is concave near the optical axis, and its image-side surface 1192 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 1191 has one inflection point, its image-side surface 1192 has two inflection points, and its image-side surface 1192 has at least one critical point off-axis.

[0424] The filter element 1193 is made of glass and is located between the ninth lens 1190 and the imaging surface 1196, and does not affect the focal length of the optical lens group used for image acquisition.

[0425] Please refer to Table 21 and Table 22 below.

[0426]

[0427]

[0428]

[0429]

[0430] In the eleventh embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in the table below are the same as in the first embodiment and will not be repeated here.

[0431]

[0432]

[0433] <Twelfth Embodiment>

[0434] Please refer to Figures 23 to 24 ,in Figure 23 A schematic diagram of an image-capturing device according to the twelfth embodiment of the present invention is shown. Figure 24 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the twelfth embodiment. Figure 23As can be seen, the image capturing device includes an image capturing optical lens group (unlabeled) and an electronic photosensitive element 1299. The image capturing optical lens group, arranged sequentially from the object side to the image side along the optical path, includes an aperture 1200, a first lens 1210, a second lens 1220, a third lens 1230, an aperture stop 1201, a fourth lens 1240, a fifth lens 1250, a sixth lens 1260, a seventh lens 1270, an eighth lens 1280, a ninth lens 1290, a filter element 1293, and an imaging plane 1296. The image capturing optical lens group is configured with a first lens group (first lens 1210, second lens 1220, and third lens 1230), a second lens group (fourth lens 1240, fifth lens 1250, and sixth lens 1260), and a third lens group (seventh lens 1270, eighth lens 1280, and ninth lens 1290). The electronic photosensitive element 1299 is disposed on the imaging surface 1296. The imaging optical lens group includes nine lenses (1210, 1220, 1230, 1240, 1250, 1260, 1270, 1280, 1290), and there are no other interposed lenses between each lens.

[0435] The first lens 1210 has positive refractive power and is made of plastic. Its object-side surface 1211 is convex near the optical axis, and its image-side surface 1212 is concave near the optical axis. Both surfaces are aspherical, and its image-side surface 1212 has a point of inflection.

[0436] The second lens 1220 has negative refractive power and is made of plastic. Its object-side surface 1221 is convex near the optical axis, and its image-side surface 1222 is concave near the optical axis. Both of its surfaces are aspherical.

[0437] The third lens 1230 has negative refractive power and is made of plastic. Its object-side surface 1231 is convex near the optical axis, and its image-side surface 1232 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 1231 has one inflection point, and its image-side surface 1232 has two inflection points.

[0438] The fourth lens 1240 has positive refractive power and is made of plastic. Its object-side surface 1241 is convex near the optical axis, and its image-side surface 1242 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 1241 has two inflection points, and its image-side surface 1242 has two inflection points.

[0439] The fifth lens 1250 has positive refractive power and is made of plastic. Its object-side surface 1251 is convex near the optical axis, and its image-side surface 1252 is convex near the optical axis. Both surfaces are aspherical. Its object-side surface 1251 has three inflection points, and its image-side surface 1252 has two inflection points.

[0440] The sixth lens 1260 has negative refractive power and is made of plastic. Its object-side surface 1261 is concave near the optical axis, and its image-side surface 1262 is convex near the optical axis. Both surfaces are aspherical. Its object-side surface 1261 has one inflection point, and its image-side surface 1262 has two inflection points.

[0441] The seventh lens 1270 has positive refractive power and is made of plastic. Its object-side surface 1271 is convex near the optical axis, and its image-side surface 1272 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 1271 has three inflection points, and its image-side surface 1272 has two inflection points. Its object-side surface 1271 has at least one critical point off-axis, and its image-side surface 1272 has at least one critical point off-axis.

[0442] The eighth lens 1280 has positive refractive power and is made of plastic. Its object-side surface 1281 is convex near the optical axis, and its image-side surface 1282 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 1281 has two inflection points, and its image-side surface 1282 has two inflection points. Its object-side surface 1281 has at least one critical point off-axis, and its image-side surface 1282 has at least one critical point off-axis.

[0443] The ninth lens 1290 has negative refractive power and is made of plastic. Its object-side surface 1291 is concave near the optical axis, and its image-side surface 1292 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 1291 has two inflection points, and its image-side surface 1292 has three inflection points. Its object-side surface 1291 has at least one critical point off-axis, and its image-side surface 1292 has at least one critical point off-axis.

[0444] The filter element 1293 is made of glass and is located between the ninth lens 1290 and the imaging surface 1296, and does not affect the focal length of the optical lens group used for image acquisition.

[0445] Please refer to Table 23 and Table 24 below.

[0446]

[0447]

[0448]

[0449]

[0450] In the twelfth embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in the table below are the same as in the first embodiment and will not be repeated here.

[0451]

[0452]

[0453] <Thirteenth Embodiment>

[0454] Please refer to Figure 25 This is a perspective view illustrating an image-capturing device according to a thirteenth embodiment of the present invention. In this embodiment, the image-capturing device 10 is a camera module. The image-capturing device 10 includes an imaging lens 11, a driving device 12, an electronic photosensitive element 13, and an image stabilization module 14. The imaging lens 11 includes an optical lens group, a lens barrel (not otherwise labeled) for supporting the optical lens group, and a support device (Holder Member, not otherwise labeled). The optical lens group may be the image-capturing optical lens group of the first embodiment described above, or the optical lens group may be the image-capturing optical lens group of other embodiments described above, and the present invention is not limited thereto. The image-capturing device 10 uses the imaging lens 11 to focus light to generate an image, and cooperates with the driving device 12 to focus the image, finally imaging it on the electronic photosensitive element 13 and outputting it as image data. The electronic photosensitive element 13 has, for example, more than 40 million pixels, thereby providing the user with better image detail.

[0455] The driving device 12 may have an auto-focus function, and its driving method can use a driving system such as a voice coil motor (VCM), microelectromechanical systems (MEMS), piezoelectric systems, and shape memory alloys. The driving device 12 allows the imaging lens 11 to achieve a better imaging position, enabling clear images to be captured even when the subject is at different object distances. In addition, the imaging device 10 is equipped with a high-sensitivity and low-noise electronic image sensor 13 (such as CMOS or CCD) located on the imaging surface of the imaging optical lens group, which can truly present the good imaging quality of the imaging optical lens group.

[0456] The image stabilization module 14 is, for example, an accelerometer, a gyroscope, or a Hall effect sensor. The drive unit 12 can work in conjunction with the image stabilization module 14 to form an optical image stabilization (OIS) device. By adjusting the changes in different axes of the imaging lens 11, it compensates for the blurry image caused by shaking during shooting, or uses image compensation technology in the image software to provide electronic image stabilization (EIS), further improving the image quality of shooting in dynamic and low-light scenes.

[0457] <Fourteenth Embodiment>

[0458] Please refer to Figures 26 to 28 ,in Figure 26 A perspective view of one side of an electronic device according to the fourteenth embodiment of the present invention is shown. Figure 27 Draw Figure 26 A three-dimensional diagram of the other side of the electronic device, and Figure 28 Draw Figure 26 System block diagram of an electronic device.

[0459] In this embodiment, the electronic device 20 is a smartphone. The electronic device 20 includes, according to the thirteenth embodiment, an image capturing device 10, image capturing devices 10a, 10b, 10c, and 10d, a flash module 21, a focus assist module 22, an image signal processor 23, a user interface 24, and an image software processor 25. Image capturing devices 10 and 10a are both located on the same side of the electronic device 20 and are both single-focus. Image capturing devices 10b, 10c, 10d, and the user interface 24 are all located on the other side of the electronic device 20, and the user interface 24 is a display device, allowing image capturing devices 10b, 10c, and 10d to function as front-facing cameras for selfies; however, this invention is not limited to this. Furthermore, image capturing devices 10a, 10b, 10c, and 10d all have a similar structural configuration to image capturing device 10. Specifically, each of image capturing devices 10a, 10b, 10c, and 10d includes an imaging lens, a driving device, an electronic photosensitive element, and an image stabilization module. Each imaging lens of image capturing devices 10a, 10b, 10c, and 10d includes an optical lens group, a lens barrel for supporting the optical lens group, and a support device.

[0460] Image capturing device 10 is a wide-angle image capturing device, image capturing device 10a is an ultra-wide-angle image capturing device, image capturing device 10b is a wide-angle image capturing device, image capturing device 10c is an ultra-wide-angle image capturing device, and image capturing device 10d is a Time-of-Flight (ToF) image capturing device. In this embodiment, image capturing device 10 and image capturing device 10a have different viewing angles. Specifically, the maximum viewing angle of image capturing device 10 and the maximum viewing angle of image capturing device 10a can differ by at least 20 degrees. This allows the electronic device 20 to acquire images of different ranges and levels of detail to meet various shooting scenarios. Additionally, image capturing device 10d can acquire depth information of the image. The above-described electronic device 20 is exemplified by including multiple image capturing devices 10, 10a, 10b, 10c, and 10d, but the number and configuration of the image capturing devices are not intended to limit the invention.

[0461] When the user takes a picture of the subject 26, the electronic device 20 uses the image capturing device 10 or image capturing device 10a to focus the light, activates the flash module 21 for supplemental lighting, and uses the subject distance information of the subject 26 provided by the focus assist module 22 for fast focusing. In addition, the image signal processor 23 performs image optimization processing to further improve the image quality produced by the optical lens group used for image capturing. The focus assist module 22 can use an infrared or laser focus assist system to achieve fast focusing. Furthermore, the electronic device 20 can also use the image capturing devices 10b, 10c, or 10d for taking pictures. The user interface 24 can use a touch screen or a physical shooting button, combined with the diverse functions of the image software processor 25 for image capturing and image processing. The image processed by the image software processor 25 can be displayed on the user interface 24.

[0462] <Fifteenth Embodiment>

[0463] Please refer to Figure 29 This is a perspective view illustrating one side of an electronic device according to the fifteenth embodiment of the present invention.

[0464] In this embodiment, the electronic device 30 is a smartphone. The electronic device 30 includes, according to the thirteenth embodiment, an image capturing device 10, an image capturing device 10e, an image capturing device 10f, a flash module 31, a focus assist module, an image signal processor, a display device, and an image software processor (not shown). Image capturing devices 10, 10e, and 10f are all disposed on the same side of the electronic device 30, while the display device is disposed on the other side. Furthermore, image capturing devices 10e and 10f have a similar structural configuration to image capturing device 10, and will not be described further here.

[0465] Image capturing device 10 is a wide-angle image capturing device, image capturing device 10e is a telephoto image capturing device, and image capturing device 10f is an ultra-wide-angle image capturing device. In this embodiment, image capturing devices 10, 10e, and 10f have different viewing angles. Specifically, half of the maximum viewing angle of image capturing device 10 can be greater than 35 degrees, and half of the maximum viewing angle of image capturing device 10e can be less than 25 degrees. That is, the maximum viewing angle of image capturing device 10 and the maximum viewing angle of image capturing device 10e can differ by at least 20 degrees; furthermore, the maximum viewing angle of image capturing device 10 and the maximum viewing angle of image capturing device 10f can also differ by at least 20 degrees. This allows image capturing devices 10e or 10f to effectively control their viewing angles, providing a better imaging range for wider applications; thus, electronic device 30 can provide different magnifications to achieve optical zoom shooting effects. In this device, half of the maximum viewing angle in the image-capturing device 10e can be less than 18 degrees; thereby, the electronic device 30 can possess different functional photography modules to provide consumers with diverse shooting applications. Furthermore, the image-capturing device 10e can be a telescopic image-capturing device with a reflective element configuration; thereby, the optical axis direction can be adjusted so that the overall length of the image-capturing device 10e is not limited by the thickness of the electronic device 30. The reflective element configuration of the image-capturing device 10e can, for example, have a similar... Figures 32 to 36 The structure can be referred to the aforementioned corresponding structure. Figures 32 to 36 The explanation will not be repeated here. It is worth noting that when the reflective element of the image capturing device 10e is configured, for example, in a similar manner... Figures 34 to 36 In this structure, the number of reflective elements is multiple; thereby, the optical axis direction can be adjusted, allowing for more efficient use of the image capturing device 10e space. The electronic device 30 described above is exemplified by including multiple image capturing devices 10, 10e, and 10f, but the number and configuration of the image capturing devices are not intended to limit the invention. When a user photographs a subject, the electronic device 30 uses image capturing device 10, image capturing device 10e, or image capturing device 10f to focus the light and capture an image, activates the flash module 31 for supplemental lighting, and performs subsequent processing in a manner similar to the aforementioned embodiments, which will not be elaborated upon here.

[0466] <Sixteenth Embodiment>

[0467] Please refer to Figure 30 This is a perspective view illustrating one side of an electronic device according to the sixteenth embodiment of the present invention.

[0468] In this embodiment, the electronic device 40 is a smartphone. The electronic device 40 includes, according to the thirteenth embodiment, image capturing devices 10g, 10h, 10i, 10j, 10k, 10m, 10n, and 10p, a flash module 41, a focus assist module, an image signal processor, a display device, and an image software processor (not shown). Image capturing devices 10g, 10h, 10i, 10j, 10k, 10m, 10n, and 10p are all located on the same side of the electronic device 40, while the display device is located on the other side of the electronic device 40. Furthermore, the imaging devices 10g, 10h, 10i, 10j, 10k, 10m, 10n, and 10p all have a similar structural configuration to the imaging device 10, which will not be described in detail here.

[0469] Image capturing device 10 is a wide-angle image capturing device, image capturing device 10g is a telescope image capturing device, image capturing device 10h is a telescope image capturing device, image capturing device 10i is a wide-angle image capturing device, image capturing device 10j is an ultra-wide-angle image capturing device, image capturing device 10k is an ultra-wide-angle image capturing device, image capturing device 10m is a telescope image capturing device, image capturing device 10n is a telescope image capturing device, and image capturing device 10p is a time-of-flight ranging image capturing device. In this embodiment, image capturing devices 10, 10g, 10h, 10m, and 10n have different viewing angles. Specifically, half of the maximum viewing angle in image capturing device 10 can be greater than 35 degrees, and half of the maximum viewing angle in image capturing devices 10g, 10h, 10m, or 10n can be less than 25 degrees. In other words, the maximum viewing angle of the image capturing device 10 can differ from that of the image capturing devices 10g, 10h, 10m, or 10n by at least 20 degrees. This allows the electronic device 40 to provide different magnifications to achieve an optical zoom effect. Half of the maximum viewing angle of the image capturing device 10g or 10h can also be less than 18 degrees. Furthermore, the image capturing devices 10g and 10h can be telescopic image capturing devices with reflective elements. The reflective element configuration of the image capturing devices 10g and 10h can, for example, have similar... Figures 32 to 36 The structure can be referred to the aforementioned corresponding structure. Figures 32 to 36The description of the image acquisition device 10p will not be repeated here. Additionally, the image acquisition device 10p can acquire depth information of the image. The electronic device 40 described above is exemplified by including multiple image acquisition devices 10, 10g, 10h, 10i, 10j, 10k, 10m, 10n, and 10p, but the number and configuration of the image acquisition devices are not intended to limit the present invention. When a user photographs a subject, the electronic device 40 uses image acquisition devices 10, 10g, 10h, 10i, 10j, 10k, 10m, 10n, or 10p to focus light and acquire an image, activates the flash module 41 for supplemental lighting, and performs subsequent processing in a manner similar to the aforementioned embodiments, which will not be repeated here.

[0470] The image capturing device 10 of the present invention is not limited to application in smartphones. The image capturing device 10 can also be applied to mobile focusing systems as needed, and features excellent aberration correction and good image quality. For example, the image capturing device 10 can be widely used in electronic devices such as three-dimensional (3D) image capture, digital cameras, mobile devices, tablet computers, smart TVs, network monitoring equipment, dashcams, reversing cameras, multi-lens devices, recognition systems, motion-sensing game consoles, and wearable devices. The aforementioned electronic devices are merely illustrative examples of practical applications of the present invention and do not limit the scope of application of the image capturing device of the present invention.

[0471] Although the present invention has been disclosed above by way of embodiments, it is not intended to limit the present invention. Any person skilled in the art may make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope defined in the appended claims.

Claims

1. An optical lens assembly for image capture, the optical lens assembly being characterized by, The nine lenses sequentially include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, and a ninth lens from an object side to an image side along an optical path, each of the nine lenses has an object side surface facing an object side direction and an image side surface facing an image side direction, and a total number of lenses of the imaging optical lens group is nine. The first lens has positive refractive power, the second lens has negative refractive power, the fifth lens has positive refractive power, the sixth lens has negative refractive power, the eighth lens has positive refractive power, the ninth lens has negative refractive power, the ninth lens image side surface is concave at a near optical axis, and the ninth lens image side surface has at least one inflection point. The ninth lens object side surface has a radius of curvature R17, the ninth lens image side surface has a radius of curvature R18, a distance from the first lens object side surface to an imaging surface on the optical axis is TL, a maximum imaging height of the imaging optical lens group is ImgH, a focal length of the imaging optical lens group is f, an entrance pupil diameter of the imaging optical lens group is EPD, a sum of interval distances of all adjacent lenses of the imaging optical lens group on the optical axis is ΣAT, an interval distance of the second lens and the third lens on the optical axis is T23, and an interval distance of the eighth lens and the ninth lens on the optical axis is T89, which satisfy the following conditions: -0.90 < (R17+R18) / (R17-R18) < 2.50; 0.50 < TL / ImgH < 1.55; 0.80 < f / EPD ≤ 1.89; and 1.20 < ΣAT / (T23+T89) ≤ 1.

94.

2. The optical lens assembly for image taking according to claim 1, wherein, The third lens image side surface is concave at a near optical axis, and the seventh lens image side surface is concave at a near optical axis.

3. The optical lens assembly for image taking according to claim 1, wherein, An Abbe number of the first lens is V1, an Abbe number of the second lens is V2, an Abbe number of the third lens is V3, an Abbe number of the fourth lens is V4, an Abbe number of the fifth lens is V5, an Abbe number of the sixth lens is V6, an Abbe number of the seventh lens is V7, an Abbe number of the eighth lens is V8, an Abbe number of the ninth lens is V9, an Abbe number of the i-th lens is Vi, a refractive index of the first lens is N1, a refractive index of the second lens is N2, a refractive index of the third lens is N3, a refractive index of the fourth lens is N4, a refractive index of the fifth lens is N5, a refractive index of the sixth lens is N6, a refractive index of the seventh lens is N7, a refractive index of the eighth lens is N8, a refractive index of the ninth lens is N9, a refractive index of the i-th lens is Ni, and a minimum value of Vi / Ni is (Vi / Ni)min, which satisfy the following conditions: 7.0 < (Vi / Ni)min < 11.80, where i = 1, 2, 3, 4, 5, 6, 7, 8, or 9.

4. The optical lens assembly for image taking according to claim 1, wherein, An Abbe number V6 of the sixth lens and an Abbe number V7 of the seventh lens satisfy the following conditions: 10.0 < V6 < 40.0; and 10.0 < V7 < 40.0。 5. The optical lens assembly for image taking according to claim 1, wherein, A radius of curvature of the object side surface of the ninth lens is R17, and a radius of curvature of the image side surface of the ninth lens is R18, which satisfy the following condition: -0.50 < (R17+R18) / (R17-R18) < 1.

50.

6. The optical lens assembly for image taking according to claim 1, wherein, A radius of curvature of the object side surface of the ninth lens is R17, and a radius of curvature of the image side surface of the ninth lens is R18, which satisfy the following condition: -0.70 < (R17+R18) / (R17-R18) < 0.

55.

7. The optical lens assembly for image taking according to claim 1, wherein, A maximum imaging height of the image capturing optical lens assembly is ImgH, and a distance from the image side surface of the ninth lens to the imaging surface on the optical axis is BL, which satisfy the following conditions: 5.80 millimeters < ImgH < 10.0 millimeters; and 5.0 < ImgH / BL < 20.

0.

8. The optical lens assembly for image taking according to claim 1, wherein, A maximum effective radius of the object side surface of the third lens is Y31, and a maximum effective radius of the image side surface of the ninth lens is Y92, which satisfy the following condition: 2.80 < Y92 / Y31 < 4.

50.

9. The optical lens assembly for image taking according to claim 1, wherein, An Abbe number V1 of the first lens, an Abbe number V2 of the second lens, an Abbe number V3 of the third lens, an entrance pupil diameter EPD of the image capturing optical lens assembly, and a distance from the image side surface of the ninth lens to the imaging surface on the optical axis are BL, which satisfy the following conditions: 0.10 < (V2+V3) / V1 < 0.90; and 3.2 < EPD / BL < 18.

0. A perpendicular distance between a critical point of the image side surface of the seventh lens and the optical axis is Yc72, a perpendicular distance between a critical point of the image side surface of the eighth lens and the optical axis is Yc82, a perpendicular distance between a critical point of the image side surface of the ninth lens and the optical axis is Yc92, and a focal length of the image capturing optical lens assembly is f, which satisfy the following conditions:

10. The optical lens assembly for image taking according to claim 1, wherein, 0.02 < Yc72 / f < 0.80; 0.02 < Yc82 / f < 0.80; and 0.02 < Yc92 / f < 0.

80. Abbe numbers of the at least four lenses in the image capturing optical lens assembly are all less than 40.0; 11. The optical lens assembly for image taking according to claim 1, wherein, wherein a focal length of the image capturing optical lens assembly is f, a focal length of the first lens is f1, a distance from the object side surface of the first lens to the image side surface of the ninth lens on the optical axis is TD, and a distance from the image side surface of the ninth lens to the imaging surface on the optical axis is BL, which satisfy the following conditions: 0.40 < f / f1 < 3.80; and 0 < BL / TD < 0.

25. A maximum value of refractive index Nmax in all the lenses of the image capturing optical lens assembly satisfies the following condition:

12. The optical lens assembly for image taking according to claim 1, wherein, 1.686 ≤ Nmax < 1.

78. ​ 13. The optical lens assembly for image taking according to claim 1, wherein, A distance on the optical axis from the first lens object-side surface to the imaging surface is TL, a maximum imaging height of the image-capturing optical lens assembly is ImgH, a focal length of the image-capturing optical lens assembly is f, an entrance pupil diameter of the image-capturing optical lens assembly is EPD, and the following conditions are satisfied: 1.26 ≤ TL / ImgH < 1.55; and 1.20 < f / EPD ≤ 1.

89.

14. An optical lens assembly for image taking, the optical lens assembly being characterized in that, The image-capturing optical lens assembly comprises nine lenses, which are sequentially arranged from an object side to an image side along an optical path as a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, and a ninth lens. The nine lenses respectively have an object-side surface facing the object side and an image-side surface facing the image side. A total number of the lenses of the image-capturing optical lens assembly is nine. The first lens has positive refractive power, the second lens has negative refractive power, the fifth lens has positive refractive power, the sixth lens has negative refractive power, the eighth lens has positive refractive power, the ninth lens has negative refractive power, the image-side surface of the ninth lens is concave at a vicinity of the optical axis, and the image-side surface of the ninth lens has at least one inflection point. A radius of curvature of the object-side surface of the ninth lens is R17, a radius of curvature of the image-side surface of the ninth lens is R18, a distance on the optical axis from the object-side surface of the first lens to an imaging surface is TL, a maximum imaging height of the image-capturing optical lens assembly is ImgH, a focal length of the image-capturing optical lens assembly is f, an entrance pupil diameter of the image-capturing optical lens assembly is EPD, and a maximum refractive index of all the lenses of the image-capturing optical lens assembly is Nmax. The following conditions are satisfied: -0.90 < (R17+R18) / (R17-R18) < 2.50; 0.50 < TL / ImgH < 1.55; 0.80 < f / EPD ≤ 1.89; and 1.67 < Nmax < 1.

78.

15. The optical lens assembly for image taking according to claim 14, wherein, The seventh lens has negative refractive power, and the image-side surface of the seventh lens is concave at a vicinity of the optical axis.

16. The optical lens assembly for image taking according to claim 14, wherein, An Abbe number of the first lens is V1, an Abbe number of the second lens is V2, an Abbe number of the third lens is V3, an Abbe number of the fourth lens is V4, an Abbe number of the fifth lens is V5, an Abbe number of the sixth lens is V6, an Abbe number of the seventh lens is V7, an Abbe number of the eighth lens is V8, an Abbe number of the ninth lens is V9, an Abbe number of the i-th lens is Vi, a refractive index of the first lens is N1, a refractive index of the second lens is N2, a refractive index of the third lens is N3, a refractive index of the fourth lens is N4, a refractive index of the fifth lens is N5, a refractive index of the sixth lens is N6, a refractive index of the seventh lens is N7, a refractive index of the eighth lens is N8, a refractive index of the ninth lens is N9, a refractive index of the i-th lens is Ni, and a minimum value of Vi / Ni is (Vi / Ni)min. The following condition is satisfied: 9.0 < (Vi / Ni)min < 11.50, where i = 1, 2, 3, 4, 5, 6, 7, 8, or 9.

17. The optical lens assembly for image taking according to claim 14, wherein, Abbe number of the sixth lens is V6 and Abbe number of the seventh lens is V7, which satisfy the following conditions: 30.0 < V6 < 40.0; and 30.0 < V7 < 40.0。 18. The optical lens assembly for image taking according to claim 14, wherein, a radius of curvature of the object side surface of the ninth lens is R17 and a radius of curvature of the image side surface of the ninth lens is R18, which satisfy the following conditions: 0.15 ≤ (R17+R18) / (R17-R18) < 0.

43.

19. The optical lens assembly for image taking according to claim 14, wherein, a radius of curvature of the object side surface of the ninth lens is R17 and a radius of curvature of the image side surface of the ninth lens is R18, which satisfy the following conditions: 0.15 ≤ (R17+R18) / (R17-R18) ≤ 0.

31.

20. The optical lens assembly for image taking according to claim 14, wherein, a focal length of the imaging optical lens assembly is f, an entrance pupil diameter of the imaging optical lens assembly is EPD, a sum of interval distances on the optical axis of all adjacent lenses in the imaging optical lens assembly is ΣAT, an interval distance on the optical axis between the second lens and the third lens is T23, and an interval distance on the optical axis between the eighth lens and the ninth lens is T89, which satisfy the following conditions: 1.79 ≤ f / EPD ≤ 1.89; and 1.69 ≤ ΣAT / (T23+T89) ≤ 1.

94.

21. The optical lens assembly for image taking according to claim 14, wherein, an image side surface of the seventh lens is concave at a paraxial region, Abbe number of the first lens is V1, Abbe number of the second lens is V2, and Abbe number of the third lens is V3, which satisfy the following conditions: 0.66 ≤ (V2+V3) / V1 < 0.

90.

22. The optical lens assembly for image taking according to claim 14, wherein, a perpendicular distance between a critical point of the image side surface of the seventh lens and the optical axis is Yc72, a perpendicular distance between a critical point of the image side surface of the eighth lens and the optical axis is Yc82, a perpendicular distance between a critical point of the image side surface of the ninth lens and the optical axis is Yc92, and a focal length of the imaging optical lens assembly is f, which satisfy the following conditions: 0.02 < Yc72 / f < 0.80; 0.02 < Yc82 / f < 0.80; and 0.02 < Yc92 / f < 0.

80.

23. The optical lens assembly for image taking according to claim 14, wherein, Abbe number of each of at least four lenses in the imaging optical lens assembly is less than 40.0; wherein a focal length of the imaging optical lens assembly is f, a focal length of the first lens is f1, a distance on the optical axis between the image side surface of the ninth lens and the imaging plane is BL, and a distance on the optical axis between the object side surface of the first lens and the image side surface of the ninth lens is TD, which satisfy the following conditions: 0.40 < f / f1 < 3.80; and 0 < BL / TD < 0.

25.

24. The optical lens assembly for image taking according to claim 14, wherein, a maximum value of refractive index in all lenses of the imaging optical lens assembly is Nmax, which satisfy the following conditions: 1.67 < Nmax < 1.

72.

25. The optical lens assembly for image taking according to claim 14, wherein, A distance from the first lens object-side surface to the imaging surface on the optical axis is TL, a maximum imaging height of the image-capturing optical lens assembly is ImgH, a focal length of the image-capturing optical lens assembly is f, and an entrance pupil diameter of the image-capturing optical lens assembly is EPD, which satisfy the following conditions: 0.90 < TL / ImgH < 1.35; and 0.80 < f / EPD ≤ 1.86.

Images