Imaging lens group

Abstract

The invention provides an imaging lens group, comprising, in order from an object side to an image side: a first lens element with positive refractive power; a second lens element with negative refractive power; a third lens element with negative refractive power; a fourth lens element with refractive power; a fifth lens element with refractive power; a sixth lens element with refractive power; a seventh lens element with refractive power; and an eighth lens element with negative refractive power. Wherein the angle of the maximum visual angle principal ray of the imaging lens group entering the imaging surface is CRA, the distance from the image side surface of the eighth lens to the imaging surface on the optical axis is BFL, and the absolute value of the displacement parallel to the optical axis from the intersection point of the object side surface of the eighth lens on the optical axis to the maximum effective radius position of the object side surface of the eighth lens is TDP15, and the following condition is satisfied: CRA * BFL / TDP15 is more than 19.04 degrees and less than 74.78 degrees.

Description

Technical Field

[0001] The present invention relates to an imaging lens group, and in particular to an imaging lens group applied to electronic products. Background Art

[0002] Small camera lenses can be widely used in various electronic products, such as wearable displays, smart phones, tablet computers, game consoles, driving recorders, home electronic devices, network surveillance cameras (IPCAM), sports cameras or drone lenses, etc. At the same time, small camera lenses are constantly moving towards the direction of being thinner and shorter. The smaller the size, the more sensitive the manufacturing and assembly will be, making mass production difficult and increasing mass production costs. Or in order to reduce assembly tolerances, the peripheral imaging quality has to be sacrificed, making the peripheral imaging blurred or deformed. Therefore, how to develop a small camera lens that can solve one of the above problems is a technical bottleneck that is currently being overcome. Summary of the invention

[0003] The purpose of the present invention is to provide an imaging lens assembly. The imaging lens assembly includes eight lenses with refractive power. When certain conditions are met, the imaging lens assembly provided by the present invention can solve the current sensitivity and imaging quality problems of small lenses. The present invention provides a large aperture, a large viewing angle, a high resolution capability, low distortion and deformation, and a low manufacturing and assembly tolerance sensitivity, thereby improving product quality and yield.

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

[0005] An imaging lens group provided by the present invention according to one embodiment includes, from the object side to the image side, a first lens having positive refractive power; a second lens having negative refractive power; a third lens having negative refractive power; a fourth lens having refractive power; a fifth lens having refractive power; a sixth lens having refractive power; a seventh lens having refractive power; and an eighth lens having negative refractive power.

[0006] In an imaging lens group, the total number of lenses with refractive power in the imaging lens group is eight, the angle of the principal ray of the maximum viewing angle of the imaging lens group incident on the imaging surface is CRA, the maximum effective radius of the object side surface of the first lens is CA1, the maximum effective radius of the image side surface of the eighth lens is CA16, the curvature radius of the object side surface of the first lens is R1, the curvature radius of the image side surface of the first lens is R2, the curvature radius of the object side surface of the fourth lens is R7, the curvature radius of the object side surface of the sixth lens is R11, the curvature radius of the image side surface of the sixth lens is R12, the curvature radius of the object side surface of the seventh lens is R13, the curvature radius of the image side surface of the seventh lens is R14, the maximum viewing angle of the imaging lens group is FOV, half of the maximum viewing angle of the imaging lens group is HFOV, the entrance pupil diameter of the imaging lens group is EPD, the distance from the image side surface of the eighth lens to the imaging surface on the optical axis is BFL, the The distance between the object side surface of the first lens and the imaging plane on the optical axis is TL, the maximum imaging height of the imaging lens group is IMH, the overall focal length of the imaging lens group is f, the focal length of the first lens is f1, the focal length of the second lens is f2, the focal length of the third lens is f3, the focal length of the fourth lens is f4, the focal length of the fifth lens is f5, the focal length of the sixth lens is f6, the dispersion coefficient of the third lens is Vd3, the dispersion coefficient of the fifth lens is Vd5, the dispersion coefficient of the seventh lens is Vd7, the dispersion coefficient of the eighth lens is Vd8, the absolute value of the displacement of the object side surface of the sixth lens from the intersection of the object side surface on the optical axis to the maximum effective radius position of the object side surface of the sixth lens parallel to the optical axis is TDP11, the absolute value of the displacement of the object side surface of the eighth lens from the intersection of the object side surface on the optical axis to the maximum effective radius position of the object side surface of the eighth lens parallel to the optical axis is TDP15, and at least one of the following conditions is satisfied:

[0007] 19.04°<CRA*BFL / TDP15<74.78°;

[0008] 22.00mm<TL*TDP15 / TDP11<131.36mm;

[0009] 22.18°<CRA*CA16 / IMH<40.26°;

[0010] 6.46mm<EPD*(CA16 / CA1)<11.65mm;

[0011] 0.73<f5 / f6<12.36;

[0012] 4.35<R7 / R13<9.18;

[0013] -32.47mm<f2*(R1 / R12)<-9.59mm;

[0014] -0.14 < R2 / R14 < 2.23;

[0015] 2.09 < (Vd7 + Vd8) / (Vd3 + Vd5) < 3.22;

[0016] 0.92 < Tan(HFOV)*TL / IMH < 1.51;

[0017] 0.79 < f1 / R11 < 1.65;

[0018] 0.29 < fff4 < 0.5;

[0019] -209.04 mm < f3*(FOV / CRA) < -51.63 mm;

[0020] 3.97 < f3 / f8 + f4 / f7 < 21.89.

[0021] When 19.04° < CRA*BFL / TDP15 < 74.78°, it helps to achieve an appropriate balance between miniaturization and back focal length.

[0022] When 22.00 mm < TL*TDP15 / TDP11 < 131.36 mm, the goal of miniaturizing the module can be achieved thereby.

[0023] When 22.18° < CRA*CA16 / IMH < 40.26°, the goal of miniaturizing the module can be achieved thereby, and the incident angle of the chief ray of the maximum viewing angle of the image sensor can be matched.

[0024] When 6.46 mm < EPD*(CA16 / CA1) < 11.65 mm, it is ensured that the imaging lens group has sufficient refractive power to achieve the purpose of shortening the length of the imaging lens group.

[0025] When 0.73 < f5 / f6 < 12.36, the refractive power distribution of the imaging lens group is more appropriate, which is beneficial to correcting the aberration of the imaging lens group to improve the imaging quality of the imaging lens group.

[0026] When 4.35 < R7 / R13 < 9.18, the curvature of the lens is adjusted thereby, which is beneficial to improving the imaging quality.

[0027] When -32.47 mm < f2*(R1 / R12) < -9.59 mm, the curvature of the lens is adjusted thereby, which is beneficial to improving the imaging quality.

[0028] When -0.14 < R2 / R14 < 2.23, the curvature of the lens is adjusted thereby, which is beneficial to improving the imaging quality.

[0029] When 2.09 < (Vd7 + Vd8) / (Vd3 + Vd5) < 3.22, the chromatic aberration of the effective balanced imaging lens group is corrected, and overcorrection is avoided.

[0030] When 0.92 < Tan(HFOV) * TL / IMH < 1.51, the goal of a large viewing angle and a miniaturized module is achieved thereby.

[0031] When 0.79 < fl / R11 < 1.65, the curvature of the sixth lens is effectively controlled to achieve smaller aberration.

[0032] When 0.29 < fff4 < 0.50, the refractive power distribution of the imaging lens group is more appropriate, which is beneficial to correcting the aberration of the imaging lens group and improving the imaging quality of the imaging lens group.

[0033] When -209.04 mm < f3 * (FOV / CRA) < -51.63 mm, a larger viewing angle is achieved thereby.

[0034] When 3.97 < f3 / f8 + f4 / f7 < 21.89, the refractive power distribution of the imaging lens group is more appropriate, which is beneficial to correcting the aberration of the imaging lens group and improving the imaging quality of the imaging lens group. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] After studying the detailed description in conjunction with the following drawings, other aspects and advantages of the present invention will be found:

[0036] Figure 1A A schematic diagram of an imaging lens group showing the first embodiment of the present invention.

[0037] Figure 1B The field curvature and distortion curves of the imaging lens group of the first embodiment from left to right in sequence.

[0038] Figure 2A A schematic diagram of an imaging lens group showing the second embodiment of the present invention.

[0039] Figure 2B The field curvature and distortion curves of the imaging lens group of the second embodiment from left to right in sequence.

[0040] Figure 3A A schematic diagram of an imaging lens group showing the third embodiment of the present invention.

[0041] Figure 3B The field curvature and distortion curves of the imaging lens group of the third embodiment from left to right in sequence.

[0042] Figure 4A A schematic diagram of an imaging lens group showing the fourth embodiment of the present invention.

[0043] Figure 4B From left to right are the field curvature and distortion curves of the imaging lens assembly of the fourth embodiment.

[0044] Figure 5A A schematic diagram of an imaging lens assembly according to a fifth embodiment of the present invention is shown.

[0045] Figure 5B From left to right are the field curvature and distortion curves of the imaging lens assembly of the fifth embodiment.

[0046] Fig. 6A A schematic diagram showing an imaging lens assembly according to a sixth embodiment of the present invention is shown.

[0047] Figure 6B From left to right are the field curvature and distortion curves of the imaging lens assembly of the sixth embodiment.

[0048] Fig. 7A It is a schematic diagram of an imaging lens assembly according to a seventh embodiment of the present invention.

[0049] Figure 7B From left to right are the field curvature and distortion curves of the imaging lens assembly of the seventh embodiment.

[0050] Description of Figure Numbers

[0051] 100, 200, 300, 400, 500, 600, 700: light bar

[0052] 110, 210, 310, 410, 510, 610, 710: First lens

[0053] 111, 211, 311, 411, 511, 611, 711: Object side surface

[0054] 112, 212, 312, 412, 512, 612, 712: Image side surface

[0055] 120, 220, 320, 420, 520, 620, 720: Second lens

[0056] 121, 221, 321, 421, 521, 621, 721: Object side surface

[0057] 122, 222, 322, 422, 522, 622, 722: Image side surface

[0058] 130, 230, 330, 430, 530, 630, 730: Third lens

[0059] 131, 231, 331, 431, 531, 631, 731: Object side surface

[0060] 132, 232, 332, 432, 532, 632, 732: Image side surface

[0061] 140, 240, 340, 440, 540, 640, 740: Fourth lens

[0062] 141, 241, 341, 441, 541, 641, 741: Object side surface

[0063] 142, 242, 342, 442, 542, 642, 742: Image side surface

[0064] 150, 250, 350, 450, 550, 650, 750: Fifth lens

[0065] 151, 251, 351, 451, 551, 651, 751: Object side surface

[0066] 152, 252, 352, 452, 552, 652, 752: Image side surface

[0067] 160, 260, 360, 460, 560, 660, 760: Sixth lens

[0068] 161, 261, 361, 461, 561, 661, 761: Object side surface

[0069] 162, 262, 362, 462, 562, 662, 762: Image side surface

[0070] 170, 270, 370, 470, 570, 670, 770: seventh lens

[0071] 171, 271, 371, 471, 571, 671, 771: Object side surface

[0072] 172, 272, 372, 472, 572, 672, 772: Image side surface

[0073] 180, 280, 380, 480, 580, 680, 780: Eighth lens

[0074] 181, 281, 381, 481, 581, 681, 781: Object side surface

[0075] 182, 282, 382, ​​482, 582, 682, 782: Image side surface

[0076] 191, 291, 391, 491, 591, 691, 791: filter elements

[0077] 192, 292, 392, 492, 592, 692, 792: Imaging surface

[0078] 193, 293, 393, 493, 593, 693, 793: Image sensors

[0079] 194, 294, 394, 494, 594, 694, 794: optical axis

[0080] CRA: The angle of the principal ray incident on the imaging surface at the maximum viewing angle of the imaging lens group

[0081] CA1: Maximum effective radius of the object side surface of the first lens

[0082] CA16: Maximum effective radius of the image-side surface of the eighth lens

[0083] R1: The radius of curvature of the object side surface of the first lens

[0084] R2: The radius of curvature of the image-side surface of the first lens

[0085] R7: The radius of curvature of the object-side surface of the fourth lens

[0086] R11: The radius of curvature of the object-side surface of the sixth lens

[0087] R12: The curvature radius of the image-side surface of the sixth lens

[0088] R13: The radius of curvature of the object side surface of the seventh lens

[0089] R14: Radius of curvature of the image-side surface of the seventh lens

[0090] FOV: The maximum viewing angle of the imaging lens group

[0091] HFOV: Maximum field of view in the imaging lens group

[0092] EPD: Entrance pupil diameter of the imaging lens group

[0093] BFL: The distance from the image side surface of the eighth lens to the imaging plane on the optical axis

[0094] TL: The distance from the object side surface of the first lens to the imaging surface on the optical axis

[0095] IMH: Maximum imaging height of the imaging lens group

[0096] f: overall focal length of the imaging lens group

[0097] f1: focal length of the first lens

[0098] f2: focal length of the second lens

[0099] f3: focal length of the third lens

[0100] f4: focal length of the fourth lens

[0101] f5: focal length of the fifth lens

[0102] f6: focal length of the sixth lens

[0103] Vd3: Abbe number of the third lens

[0104] Vd5: Abbe number of the fifth lens

[0105] Vd7: Abbe number of the seventh lens

[0106] Vd8: Abbe number of the eighth lens

[0107] TDP11: The absolute value of the displacement parallel to the optical axis from the intersection of the object side surface of the sixth lens on the optical axis to the maximum effective radius position of the object side surface of the sixth lens

[0108] TDP15: The absolute value of the displacement parallel to the optical axis from the intersection of the object side surface of the eighth lens on the optical axis to the maximum effective radius position of the object side surface of the eighth lens DETAILED DESCRIPTION

[0109] <First Embodiment>

[0110] Please refer to Figure 1A and Figure 1B ,in Figure 1A FIG. 1 is a schematic diagram of an imaging lens assembly according to a first embodiment of the present invention. Figure 1B From left to right are the field curvature and distortion curves of the imaging lens assembly of the first embodiment. Figure 1A It can be seen that the imaging lens group includes a light barrier 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 filter element 191, and an imaging surface 192 in order from the object side to the image side along the optical axis 194, and the imaging lens group is used in conjunction with an image sensor 193. The number of lenses with refractive power in the imaging lens group is eight, but not limited thereto. The image sensor 193 is disposed on the imaging surface 192.

[0111] The first lens 110 has positive refractive power and is made of plastic. Its object-side surface 111 is convex near the optical axis 194 , and its image-side surface 112 is concave near the optical axis 194 . Both the object-side surface 111 and the image-side surface 112 are aspherical.

[0112] The second lens 120 has negative refractive power and is made of plastic. Its object-side surface 121 is convex near the optical axis 194 , and its image-side surface 122 is concave near the optical axis 194 . Both the object-side surface 121 and the image-side surface 122 are aspherical.

[0113] The third lens 130 has negative refractive power and is made of plastic. Its object-side surface 131 is convex near the optical axis 194 , and its image-side surface 132 is concave near the optical axis 194 . Both the object-side surface 131 and the image-side surface 132 are aspherical.

[0114] The fourth lens 140 has positive refractive power and is made of plastic. Its object-side surface 141 is convex near the optical axis 194 , and its image-side surface 142 is convex near the optical axis 194 . Both the object-side surface 141 and the image-side surface 142 are aspherical.

[0115] The fifth lens 150 has negative refractive power and is made of plastic. Its object-side surface 151 is concave near the optical axis 194 , and its image-side surface 152 is convex near the optical axis 194 . Both the object-side surface 151 and the image-side surface 152 are aspherical.

[0116] The sixth lens 160 has negative refractive power and is made of plastic. Its object-side surface 161 is convex near the optical axis 194 , and its image-side surface 162 is concave near the optical axis 194 . Both the object-side surface 161 and the image-side surface 162 are aspherical.

[0117] The seventh lens 170 has positive refractive power and is made of plastic. Its object-side surface 171 is convex near the optical axis 194 , and its image-side surface 172 is concave near the optical axis 194 . Both the object-side surface 171 and the image-side surface 172 are aspherical.

[0118] The eighth lens 180 has negative refractive power and is made of plastic. Its object-side surface 181 is concave near the optical axis 194 , and its image-side surface 182 is concave near the optical axis 194 . Both the object-side surface 181 and the image-side surface 182 are aspherical.

[0119] The filter 191 is made of glass and is disposed between the eighth lens 180 and the imaging surface 192 without affecting the focal length of the imaging lens group. In this embodiment, the filter 191 is an IR-cut filter that allows visible light to pass through.

[0120] The curve equations of the aspheric surfaces of the above lenses are expressed as follows:

[0121]

[0122] Wherein z is the position value at a height of h along the optical axis 194 with the surface vertex as a reference; c is the curvature of the lens surface close to the optical axis 194, and is the inverse of the radius of curvature (R) (c=1 / R), R is the radius of curvature of the lens surface close to the optical axis 194, h is the vertical distance between the lens surface and the optical axis 194, k is the conic constant, and Ai is the i-th order aspheric coefficient.

[0123] In the first embodiment, the overall focal length of the imaging lens group is f, the aperture value (f-number) of the imaging lens group is Fno, the maximum viewing angle (angle of view) in the imaging lens group is FOV, and the entrance pupil diameter of the imaging lens group is EPD, and its values ​​are as follows: f=6.44 (mm); Fno=1.86; FOV=84.9 (degrees); and EPD=3.46 (mm).

[0124] In the imaging lens group of the first embodiment, the angle of the principal ray of the maximum viewing angle of the imaging lens group incident on the imaging surface 192 is CRA, the distance from the image-side surface 182 of the eighth lens 180 to the imaging surface 192 on the optical axis 194 is BFL, and the absolute value of the displacement from the intersection of the object-side surface 181 of the eighth lens 180 on the optical axis 194 to the maximum effective radius position of the object-side surface 181 of the eighth lens 180 parallel to the optical axis 194 is TDP15, and the following condition is satisfied: CRA*BFL / TDP15=28.12°.

[0125] In the imaging lens group of the first embodiment, the distance between the object-side surface 111 of the first lens 110 and the imaging surface 192 on the optical axis 194 is TL, the absolute value of the displacement from the intersection of the object-side surface 161 of the sixth lens 160 on the optical axis 194 to the maximum effective radius position of the object-side surface 161 of the sixth lens 160 parallel to the optical axis 194 is TDP11, and the absolute value of the displacement from the intersection of the object-side surface 181 of the eighth lens 180 on the optical axis 194 to the maximum effective radius position of the object-side surface 181 of the eighth lens 180 parallel to the optical axis 194 is TDP15, and the following condition is satisfied: TL*TDP15 / TDP11=37.99 mm.

[0126] In the imaging lens group of the first embodiment, the angle of the maximum viewing angle of the imaging lens group at which the principal ray is incident on the imaging surface 192 is CRA, the maximum effective radius of the image-side surface 182 of the eighth lens 180 is CA16, the maximum imaging height of the imaging lens group is IMH, and the following condition is satisfied: CRA*CA16 / IMH=27.72°.

[0127] In the imaging lens group of the first embodiment, the incident pupil diameter of the imaging lens group is EPD, the maximum effective radius of the object side surface 111 of the first lens 110 is CA1, the maximum effective radius of the image side surface 182 of the eighth lens 180 is CA16, and the following condition is satisfied: EPD*(CA16 / CA1)=9.13mm.

[0128] In the imaging lens group of the first embodiment, the focal length of the fifth lens 150 is f5, the focal length of the sixth lens 160 is f6, and the following condition is satisfied: f5 / f6=7.84.

[0129] In the imaging lens group of the first embodiment, the curvature radius of the object-side surface 141 of the fourth lens 140 is R7, the curvature radius of the object-side surface 171 of the seventh lens 170 is R13, and the following condition is satisfied: R7 / R13=7.32.

[0130] In the imaging lens group of the first embodiment, the focal length of the second lens 120 is f2, the curvature radius of the object side surface 111 of the first lens 110 is R1, the curvature radius of the image side surface 162 of the sixth lens 160 is R12, and the following condition is satisfied: f2*(R1 / R12)=-23.69mm.

[0131] In the imaging lens group of the first embodiment, the curvature radius of the image-side surface 112 of the first lens 110 is R2, the curvature radius of the image-side surface 172 of the seventh lens 170 is R14, and the following condition is satisfied: R2 / R14=0.29.

[0132] In the imaging lens group of the first embodiment, the dispersion coefficient of the third lens 130 is Vd3, the dispersion coefficient of the fifth lens 150 is Vd5, the dispersion coefficient of the seventh lens 170 is Vd7, and the dispersion coefficient of the eighth lens 180 is Vd8, and the following condition is satisfied: (Vd7+Vd8) / (Vd3+Vd5)=2.69.

[0133] In the imaging lens group of the first embodiment, half of the maximum viewing angle of the imaging lens group is HFOV, the distance from the object side surface 111 of the first lens 110 to the imaging surface 192 on the optical axis 194 is TL, the maximum imaging height of the imaging lens group is IMH, and the following condition is satisfied: Tan(HFOV)*TL / IMH=1.20.

[0134] In the imaging lens group of the first embodiment, the focal length of the first lens 110 is f1, the curvature radius of the object-side surface 161 of the sixth lens 160 is R11, and the following condition is satisfied: f1 / R11=1.15.

[0135] In the imaging lens group of the first embodiment, the overall focal length of the imaging lens group is f, the focal length of the fourth lens 140 is f4, and the following condition is satisfied: f / f4=0.41.

[0136] In the imaging lens group of the first embodiment, the focal length of the third lens 130 is f3, the maximum viewing angle in the imaging lens group is FOV, the angle of the maximum viewing angle principal ray of the imaging lens group incident on the imaging surface 192 is CRA, and the following conditions are satisfied: f3*(FOV / CRA)=-118.41mm.

[0137] In the imaging lens group of the first embodiment, the focal length of the third lens 130 is f3, the focal length of the fourth lens 140 is f4, the focal length of the seventh lens 170 is f7, and the focal length of the eighth lens 180 is f8, and the following condition is satisfied: f3 / f8+f4 / f7=13.97.

[0138] Please refer to Table 1, Table 2 and Table 3 below.

[0139]

[0140]

[0141]

[0142]

[0143]

[0144] Table 1 Figure 1ADetailed structural data of the first embodiment, wherein the units of the curvature radius, thickness, gap and focal length are mm, and surfaces 0-20 represent surfaces from the object side to the image side in sequence, wherein surface 0 is the gap between the object and the light bar 100 on the optical axis 194, surface 1 is the gap between the light bar 100 and the first lens 110 on the optical axis 194, and the light bar 100 is farther away from the object side than the object side surface 111 of the first lens 110, so it is represented by a negative value; surface 2 is the gap between the first lens 110 on the optical axis Surface 3 is the gap between the first lens 110 and the second lens 120 on the optical axis 194; Surface 4 is the thickness of the second lens 120 on the optical axis 194; Surface 5 is the gap between the second lens 120 and the third lens 130 on the optical axis 194; Surface 6 is the thickness of the third lens 130 on the optical axis 194; Surface 7 is the gap between the third lens 130 and the fourth lens 140 on the optical axis 194; Surface 8 is the thickness of the fourth lens 140 on the optical axis 19 Surface 9 is the gap between the fourth lens 140 and the fifth lens 150 on the optical axis 194; surface 10 is the thickness of the fifth lens 150 on the optical axis 194; surface 11 is the gap between the fifth lens 150 and the sixth lens 160 on the optical axis 194; surface 12 is the thickness of the sixth lens 160 on the optical axis 194; surface 13 is the gap between the sixth lens 160 and the seventh lens 170 on the optical axis 194; surface 14 is the thickness of the seventh lens 170 on the optical axis 194. Surface 15 is the gap between the seventh lens 170 and the eighth lens 180 on the optical axis 194; surface 16 is the thickness of the eighth lens 180 on the optical axis 194; surface 17 is the gap between the eighth lens 180 and the filter element 191 on the optical axis 194; surface 18 is the thickness of the filter element 191 on the optical axis 194; surface 19 is the gap between the filter element 191 and the imaging surface 192 on the optical axis 194; surface 20 is the imaging surface 192.

[0145] Table 2 is the aspheric surface data in the first embodiment, wherein k is the cone coefficient in the aspheric curve equation, and A2, A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, and A28 are high-order aspheric surface coefficients. In addition, the following tables of the embodiments correspond to the schematic diagrams and image plane curvature curve diagrams of the embodiments, and the definitions of the data in the tables are the same as those in Tables 1, 2, and 3 of the first embodiment, and are not repeated here.

[0146] <Second Embodiment>

[0147] Please refer to Figure 2A and Figure 2B ,in Figure 2A FIG. 1 is a schematic diagram of an imaging lens assembly according to a second embodiment of the present invention. Figure 2BFrom left to right are the field curvature and distortion curves of the imaging lens assembly of the second embodiment. Figure 2A It can be seen that the imaging lens group includes a light barrier 200, a first lens 210, a second lens 220, a third lens 230, a fourth lens 240, a fifth lens 250, a sixth lens 260, a seventh lens 270, an eighth lens 280, a filter element 291, and an imaging surface 292 in order from the object side to the image side along the optical axis 294, and the imaging lens group is used in conjunction with an image sensor 293. The number of lenses with refractive power in the imaging lens group is eight, but not limited thereto. The image sensor 293 is disposed on the imaging surface 292.

[0148] The first lens 210 has positive refractive power and is made of plastic. Its object side surface 211 is convex near the optical axis 294 , and its image side surface 212 is concave near the optical axis 294 . Both the object side surface 211 and the image side surface 212 are aspherical.

[0149] The second lens 220 has negative refractive power and is made of plastic. Its object-side surface 221 is convex near the optical axis 294 , and its image-side surface 222 is concave near the optical axis 294 . Both the object-side surface 221 and the image-side surface 222 are aspherical.

[0150] The third lens 230 has negative refractive power and is made of plastic. Its object-side surface 231 is convex near the optical axis 294 , and its image-side surface 232 is concave near the optical axis 294 . Both the object-side surface 231 and the image-side surface 232 are aspherical.

[0151] The fourth lens 240 has positive refractive power and is made of plastic. Its object-side surface 241 is convex near the optical axis 294 , and its image-side surface 242 is convex near the optical axis 294 . Both the object-side surface 241 and the image-side surface 242 are aspherical.

[0152] The fifth lens 250 has negative refractive power and is made of plastic. Its object-side surface 251 is concave near the optical axis 294 , and its image-side surface 252 is convex near the optical axis 294 . Both the object-side surface 251 and the image-side surface 252 are aspherical.

[0153] The sixth lens 260 has negative refractive power and is made of plastic. Its object-side surface 261 is convex near the optical axis 294 , and its image-side surface 262 is concave near the optical axis 294 . Both the object-side surface 261 and the image-side surface 262 are aspherical.

[0154] The seventh lens element 270 has positive refractive power and is made of plastic. Its object-side surface 271 is convex near the optical axis 294 , and its image-side surface 272 is concave near the optical axis 294 . Both the object-side surface 271 and the image-side surface 272 are aspherical.

[0155] The eighth lens 280 has negative refractive power and is made of plastic. Its object-side surface 281 is concave near the optical axis 294 , and its image-side surface 282 is concave near the optical axis 294 . Both the object-side surface 281 and the image-side surface 282 are aspherical.

[0156] The filter 291 is made of glass and is disposed between the eighth lens 280 and the imaging surface 292 without affecting the focal length of the imaging lens group. In this embodiment, the filter 291 is an IR-cut filter that allows visible light to pass through.

[0157] Please refer to Table 4, Table 5 and Table 6 below.

[0158]

[0159]

[0160]

[0161]

[0162]

[0163] In the second embodiment, the curve equation of the aspheric surface is expressed in the same form as in the first embodiment. In addition, the definitions of the parameters in the following table are the same as those in the first embodiment and are not repeated here.

[0164] The following data can be calculated by combining Tables 4 to 6:

[0165]

[0166] <Third Embodiment>

[0167] Please refer to Figure 3A and Figure 3B ,in Figure 3A FIG. 1 is a schematic diagram of an imaging lens assembly according to a third embodiment of the present invention. Figure 3B From left to right are the field curvature and distortion curves of the imaging lens assembly of the third embodiment. Figure 3AIt can be seen that the imaging lens group includes a light barrier 300, a first lens 310, a second lens 320, a third lens 330, a fourth lens 340, a fifth lens 350, a sixth lens 360, a seventh lens 370, an eighth lens 380, a filter element 391, and an imaging surface 392 in order from the object side to the image side along the optical axis 394, and the imaging lens group is used in conjunction with an image sensor 393. The number of lenses with refractive power in the imaging lens group is eight, but not limited thereto. The image sensor 393 is disposed on the imaging surface 392.

[0168] The first lens 310 has positive refractive power and is made of plastic. Its object side surface 311 is convex near the optical axis 394 , and its image side surface 312 is concave near the optical axis 394 . Both the object side surface 311 and the image side surface 312 are aspherical.

[0169] The second lens 320 has negative refractive power and is made of plastic. Its object-side surface 321 is convex near the optical axis 394 , and its image-side surface 322 is concave near the optical axis 394 . Both the object-side surface 321 and the image-side surface 322 are aspherical.

[0170] The third lens 330 has negative refractive power and is made of plastic. Its object-side surface 331 is convex near the optical axis 394 , and its image-side surface 332 is concave near the optical axis 394 . Both the object-side surface 331 and the image-side surface 332 are aspherical.

[0171] The fourth lens 340 has positive refractive power and is made of plastic. Its object-side surface 341 is convex near the optical axis 394 , and its image-side surface 342 is convex near the optical axis 394 . Both the object-side surface 341 and the image-side surface 342 are aspherical.

[0172] The fifth lens 350 has negative refractive power and is made of plastic. Its object-side surface 351 is concave near the optical axis 394 , and its image-side surface 352 is convex near the optical axis 394 . Both the object-side surface 351 and the image-side surface 352 are aspherical.

[0173] The sixth lens 360 has negative refractive power and is made of plastic. Its object-side surface 361 is convex near the optical axis 394 , and its image-side surface 362 is concave near the optical axis 394 . Both the object-side surface 361 and the image-side surface 362 are aspherical.

[0174] The seventh lens 370 has positive refractive power and is made of plastic. Its object-side surface 371 is convex near the optical axis 394 , and its image-side surface 372 is concave near the optical axis 394 . Both the object-side surface 371 and the image-side surface 372 are aspherical.

[0175] The eighth lens 380 has negative refractive power and is made of plastic. Its object-side surface 381 is concave near the optical axis 394 , and its image-side surface 382 is concave near the optical axis 394 . Both the object-side surface 381 and the image-side surface 382 are aspherical.

[0176] The filter 391 is made of glass and is disposed between the eighth lens 380 and the imaging surface 392 without affecting the focal length of the imaging lens group. In this embodiment, the filter 391 is an IR-cut filter that allows visible light to pass through.

[0177] Please refer to Table 8, Table 9 and Table 10 below.

[0178]

[0179]

[0180]

[0181]

[0182]

[0183] In the third embodiment, the curve equation of the aspheric surface is expressed in the same form as in the first embodiment. In addition, the definitions of the parameters in the following table are the same as those in the first embodiment and are not repeated here.

[0184] The following data can be calculated by combining Tables 8 to 10:

[0185]

[0186] <Fourth Embodiment>

[0187] Please refer to Figure 4A and Figure 4B ,in Figure 4A FIG. 4 is a schematic diagram showing an imaging lens assembly according to a fourth embodiment of the present invention. Figure 4B From left to right are the field curvature and distortion curves of the imaging lens assembly of the fourth embodiment. Figure 4A It can be seen that the imaging lens group includes a light barrier 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 filter element 491, and an imaging surface 492 in order from the object side to the image side along the optical axis 494, and the imaging lens group is used in conjunction with an image sensor 493. The number of lenses with refractive power in the imaging lens group is eight, but not limited thereto. The image sensor 493 is disposed on the imaging surface 492.

[0188] The first lens 410 has positive refractive power and is made of plastic. Its object side surface 411 is convex near the optical axis 494 , and its image side surface 412 is concave near the optical axis 494 . Both the object side surface 411 and the image side surface 412 are aspherical.

[0189] The second lens 420 has negative refractive power and is made of plastic. Its object-side surface 421 is convex near the optical axis 494 , and its image-side surface 422 is concave near the optical axis 494 . Both the object-side surface 421 and the image-side surface 422 are aspherical.

[0190] The third lens 430 has negative refractive power and is made of plastic. Its object-side surface 431 is convex near the optical axis 494 , and its image-side surface 432 is concave near the optical axis 494 . Both the object-side surface 431 and the image-side surface 432 are aspherical.

[0191] The fourth lens 440 has positive refractive power and is made of plastic. Its object-side surface 441 is convex near the optical axis 494 , and its image-side surface 442 is convex near the optical axis 494 . Both the object-side surface 441 and the image-side surface 442 are aspherical.

[0192] The fifth lens 450 has negative refractive power and is made of plastic. Its object-side surface 451 is concave near the optical axis 494 , and its image-side surface 452 is convex near the optical axis 494 . Both the object-side surface 451 and the image-side surface 452 are aspherical.

[0193] The sixth lens 460 has negative refractive power and is made of plastic. Its object-side surface 461 is convex near the optical axis 494 , and its image-side surface 462 is concave near the optical axis 494 . Both the object-side surface 461 and the image-side surface 462 are aspherical.

[0194] The seventh lens element 470 has positive refractive power and is made of plastic. Its object-side surface 471 is convex near the optical axis 494 , and its image-side surface 472 is convex near the optical axis 494 . Both the object-side surface 471 and the image-side surface 472 are aspherical.

[0195] The eighth lens 480 has negative refractive power and is made of plastic. Its object-side surface 481 is concave near the optical axis 494 , and its image-side surface 482 is concave near the optical axis 494 . Both the object-side surface 481 and the image-side surface 482 are aspherical.

[0196] The filter element 491 is made of glass, and is disposed between the eighth lens 480 and the imaging surface 492 without affecting the focal length of the imaging lens group. In this embodiment, the filter element 491 is an infrared filter element (IR-cut Filter) that allows visible light to pass through.

[0197] Please refer to Table 12, Table 13 and Table 14 below.

[0198]

[0199]

[0200]

[0201]

[0202]

[0203] In the fourth embodiment, the curve equation of the aspheric surface is expressed in the same form as in the first embodiment. In addition, the definitions of the parameters in the following table are the same as those in the first embodiment and are not repeated here.

[0204] The following data can be calculated by combining Tables 12 to 14:

[0205]

[0206] <Fifth Embodiment>

[0207] Please refer to Figure 5A and Figure 5B ,in Figure 5A FIG. 4 is a schematic diagram showing an imaging lens assembly according to a fifth embodiment of the present invention. Figure 5B From left to right are the field curvature and distortion curves of the imaging lens assembly of the fifth embodiment. Figure 5A It can be seen that the imaging lens group includes a first lens 510, a light barrier 500, 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 filter element 591, and an imaging surface 592 in order from the object side to the image side along the optical axis 594, and the imaging lens group is used in conjunction with an image sensor 593. The number of lenses with refractive power in the imaging lens group is eight, but not limited thereto. The image sensor 593 is disposed on the imaging surface 592.

[0208] The first lens 510 has positive refractive power and is made of glass. Its object-side surface 511 is convex near the optical axis 594 , and its image-side surface 512 is concave near the optical axis 594 . Both the object-side surface 511 and the image-side surface 512 are aspherical.

[0209] The second lens 520 has negative refractive power and is made of plastic. Its object-side surface 521 is convex near the optical axis 594 , and its image-side surface 522 is concave near the optical axis 594 . Both the object-side surface 521 and the image-side surface 522 are aspherical.

[0210] The third lens 530 has negative refractive power and is made of plastic. Its object-side surface 531 is convex near the optical axis 594 , and its image-side surface 532 is concave near the optical axis 594 . Both the object-side surface 531 and the image-side surface 532 are aspherical.

[0211] The fourth lens 540 has positive refractive power and is made of plastic. Its object-side surface 541 is convex near the optical axis 594 , and its image-side surface 542 is convex near the optical axis 594 . Both the object-side surface 541 and the image-side surface 542 are aspherical.

[0212] The fifth lens 550 has positive refractive power and is made of plastic. Its object-side surface 551 is concave near the optical axis 594 , and its image-side surface 552 is convex near the optical axis 594 . Both the object-side surface 551 and the image-side surface 552 are aspherical.

[0213] The sixth lens 560 has positive refractive power and is made of plastic. Its object-side surface 561 is convex near the optical axis 594 , and its image-side surface 562 is concave near the optical axis 594 . Both the object-side surface 561 and the image-side surface 562 are aspherical.

[0214] The seventh lens element 570 has positive refractive power and is made of plastic. Its object-side surface 571 is convex near the optical axis 594 , and its image-side surface 572 is concave near the optical axis 594 . Both the object-side surface 571 and the image-side surface 572 are aspherical.

[0215] The eighth lens 580 has negative refractive power and is made of plastic. Its object-side surface 581 is convex near the optical axis 594 , and its image-side surface 582 is concave near the optical axis 594 . Both the object-side surface 581 and the image-side surface 582 are aspherical.

[0216] The filter element 591 is made of glass, and is disposed between the eighth lens 580 and the imaging surface 592 without affecting the focal length of the imaging lens group. In this embodiment, the filter element 591 is an infrared filter element (IR-cut Filter) that allows visible light bands to pass through.

[0217] Please refer to Table 16, Table 17 and Table 18 below.

[0218]

[0219]

[0220]

[0221]

[0222]

[0223] In the fifth embodiment, the curve equation of the aspheric surface is expressed in the same form as in the first embodiment. In addition, the definitions of the parameters in the following table are the same as those in the first embodiment and are not repeated here.

[0224] The following data can be calculated by combining Tables 16 to 18:

[0225]

[0226] <Sixth embodiment>

[0227] Please refer to Fig. 6A and Figure 6B ,in Fig. 6A FIG. 4 is a schematic diagram showing an imaging lens assembly according to a sixth embodiment of the present invention. Figure 6B From left to right are the field curvature and distortion curves of the imaging lens assembly of the sixth embodiment. Fig. 6A It can be seen that the imaging lens group includes a first lens 610, a light barrier 600, 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 filter element 691, and an imaging surface 692 in order from the object side to the image side along the optical axis 694, and the imaging lens group is used in conjunction with an image sensor 693. The number of lenses with refractive power in the imaging lens group is eight, but not limited thereto. The image sensor 693 is disposed on the imaging surface 692.

[0228] The first lens 610 has positive refractive power and is made of plastic. Its object-side surface 611 is convex near the optical axis 694 , and its image-side surface 612 is concave near the optical axis 694 . Both the object-side surface 611 and the image-side surface 612 are aspherical.

[0229] The second lens 620 has negative refractive power and is made of plastic. Its object-side surface 621 is convex near the optical axis 694 , and its image-side surface 622 is concave near the optical axis 694 . Both the object-side surface 621 and the image-side surface 622 are aspherical.

[0230] The third lens 630 has negative refractive power and is made of plastic. Its object-side surface 631 is convex near the optical axis 694 , and its image-side surface 632 is concave near the optical axis 694 . Both the object-side surface 631 and the image-side surface 632 are aspherical.

[0231] The fourth lens 640 has positive refractive power and is made of plastic. Its object-side surface 641 is convex near the optical axis 694 , and its image-side surface 642 is convex near the optical axis 694 . Both the object-side surface 641 and the image-side surface 642 are aspherical.

[0232] The fifth lens 650 has negative refractive power and is made of plastic. Its object-side surface 651 is concave near the optical axis 694 , and its image-side surface 652 is convex near the optical axis 694 . Both the object-side surface 651 and the image-side surface 652 are aspherical.

[0233] The sixth lens 660 has negative refractive power and is made of plastic. Its object-side surface 661 is convex near the optical axis 694 , and its image-side surface 662 is concave near the optical axis 694 . Both the object-side surface 661 and the image-side surface 662 are aspherical.

[0234] The seventh lens 670 has positive refractive power and is made of plastic. Its object-side surface 671 is convex near the optical axis 694 , and its image-side surface 672 is concave near the optical axis 694 . Both the object-side surface 671 and the image-side surface 672 are aspherical.

[0235] The eighth lens 680 has negative refractive power and is made of plastic. Its object-side surface 681 is concave near the optical axis 694 , and its image-side surface 682 is concave near the optical axis 694 . Both the object-side surface 681 and the image-side surface 682 are aspherical.

[0236] The filter element 691 is made of glass, and is disposed between the eighth lens 680 and the imaging surface 692 without affecting the focal length of the imaging lens group. In this embodiment, the filter element 691 is an infrared filter element (IR-cut Filter) that allows visible light to pass through.

[0237] Please refer to Table 20, Table 21 and Table 22 below.

[0238]

[0239]

[0240]

[0241]

[0242]

[0243] In the sixth embodiment, the curve equation of the aspheric surface is expressed in the same form as in the first embodiment. In addition, the definitions of the parameters in the following table are the same as those in the first embodiment and are not repeated here.

[0244] The following data can be calculated by combining Tables 20 to 22:

[0245]

[0246]

[0247] <Seventh Embodiment>

[0248] Please refer to Fig. 7A and Figure 7B ,in Fig. 7A FIG. 1 is a schematic diagram of an imaging lens assembly according to a seventh embodiment of the present invention. Figure 7B From left to right are the field curvature and distortion curves of the imaging lens assembly of the seventh embodiment. Fig. 7A It can be seen that the imaging lens group includes a first lens 710, a light barrier 700, a second lens 720, a third lens 730, a fourth lens 740, a fifth lens 750, a sixth lens 760, a seventh lens 770, an eighth lens 780, a filter element 791, and an imaging surface 792 in order from the object side to the image side along the optical axis 794, and the imaging lens group is used in conjunction with an image sensor 793. The number of lenses with refractive power in the imaging lens group is eight, but not limited thereto. The image sensor 793 is disposed on the imaging surface 792.

[0249] The first lens 710 has positive refractive power and is made of glass. Its object side surface 711 is convex near the optical axis 794 , and its image side surface 712 is concave near the optical axis 794 . Both the object side surface 711 and the image side surface 712 are aspherical.

[0250] The second lens 720 has negative refractive power and is made of plastic. Its object-side surface 721 is convex near the optical axis 794 , and its image-side surface 722 is concave near the optical axis 794 . Both the object-side surface 721 and the image-side surface 722 are aspherical.

[0251] The third lens 730 has negative refractive power and is made of plastic. Its object-side surface 731 is convex near the optical axis 794 , and its image-side surface 732 is concave near the optical axis 794 . Both the object-side surface 731 and the image-side surface 732 are aspherical.

[0252] The fourth lens 740 has positive refractive power and is made of plastic. Its object-side surface 741 is convex near the optical axis 794 , and its image-side surface 742 is convex near the optical axis 794 . Both the object-side surface 741 and the image-side surface 742 are aspherical.

[0253] The fifth lens 750 has positive refractive power and is made of plastic. Its object-side surface 751 is concave near the optical axis 794 , and its image-side surface 752 is convex near the optical axis 794 . Both the object-side surface 751 and the image-side surface 752 are aspherical.

[0254] The sixth lens 760 has positive refractive power and is made of plastic. Its object-side surface 761 is convex near the optical axis 794 , and its image-side surface 762 is concave near the optical axis 794 . Both the object-side surface 761 and the image-side surface 762 are aspherical.

[0255] The seventh lens 770 has positive refractive power and is made of plastic. Its object-side surface 771 is convex near the optical axis 794 , and its image-side surface 772 is concave near the optical axis 794 . Both the object-side surface 771 and the image-side surface 772 are aspherical.

[0256] The eighth lens 780 has negative refractive power and is made of plastic. Its object-side surface 781 is convex near the optical axis 794 , and its image-side surface 782 is concave near the optical axis 794 . Both the object-side surface 781 and the image-side surface 782 are aspherical.

[0257] The filter element 791 is made of glass, and is disposed between the eighth lens 780 and the imaging surface 792 without affecting the focal length of the imaging lens group. In this embodiment, the filter element 791 is an infrared filter element (IR-cut Filter) that allows visible light to pass through.

[0258] Please refer to Table 24, Table 25 and Table 26 below.

[0259]

[0260]

[0261]

[0262]

[0263]

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

[0265] The following data can be calculated by combining Tables 24 to 26:

[0266]

[0267] The imaging lens set provided by the present invention can be made of plastic or glass. When the lens is made of plastic, the production cost can be effectively reduced. When the lens is made of glass, the freedom of refractive power configuration of the imaging lens set can be increased. In addition, the object side surface and the image side surface of the lens in the imaging lens set can be aspherical surfaces. The aspherical surface can be easily made into a shape other than a spherical surface, thereby obtaining more control variables to reduce aberrations and further reduce the number of lenses used, thereby effectively reducing the total length of the imaging lens set of the present invention.

[0268] In the imaging lens assembly provided by the present invention, the filter element is made of glass, but is not limited thereto and may also be made of other materials with high dispersion coefficient.

[0269] In the imaging lens group provided by the present invention, with respect to the lens having refractive power, if the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at the near optical axis; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at the near optical axis.

[0270] The imaging lens assembly provided by the present invention can be applied to an optical system with mobile focus according to visual requirements, and has the characteristics of excellent aberration correction and good imaging quality. It can be widely used in electronic imaging systems such as 3D (three-dimensional) image capture, wearable displays of virtual reality (VR) or augmented reality (AR), game consoles, monitor camera lenses, digital cameras, mobile devices, digital tablets, sports cameras, drone lenses, home electronic devices or car photography.

Claims

1. An imaging lens assembly, characterized in that: From the object side to the image side, it includes: a first lens having positive refractive power; a second lens having negative refractive power; a third lens element having negative refractive power; a fourth lens having refractive power; a fifth lens having refractive power; a sixth lens having refractive power; a seventh lens having refractive power; as well as an eighth lens having negative refractive power; The angle of the principal ray with the maximum viewing angle of the imaging lens group incident on the imaging plane is CRA, the distance from the image side surface of the eighth lens to the imaging plane on the optical axis is BFL, the absolute value of the displacement from the intersection of the object side surface of the eighth lens on the optical axis to the maximum effective radius position of the object side surface of the eighth lens parallel to the optical axis is TDP15, and the following conditions are satisfied: 19.04°<CRA*BFL / TDP15<74.78°.

2. The imaging lens assembly according to claim 1, characterized in that: The distance between the object side surface of the first lens and the imaging plane on the optical axis is TL, the absolute value of the displacement from the intersection of the object side surface of the sixth lens on the optical axis to the maximum effective radius position of the object side surface of the sixth lens parallel to the optical axis is TDP11, and the absolute value of the displacement from the intersection of the object side surface of the eighth lens on the optical axis to the maximum effective radius position of the object side surface of the eighth lens parallel to the optical axis is TDP15, and the following condition is satisfied: 22.00mm<TL*TDP15 / TDP11<131.36mm.

3. The imaging lens assembly according to claim 1, characterized in that: The angle of the main light of the maximum viewing angle of the imaging lens group incident on the imaging surface is CRA, the maximum effective radius of the image side surface of the eighth lens is CA16, the maximum imaging height of the imaging lens group is IMH, and the following conditions are met: 22.18°<CRA*CA16 / IMH<40.26°.

4. The imaging lens assembly according to claim 1, characterized in that: The incident pupil diameter of the imaging lens group is EPD, the maximum effective radius of the object side surface of the first lens is CA1, the maximum effective radius of the image side surface of the eighth lens is CA16, and the following conditions are met: 6.46mm<EPD*(CA16 / CA1)<11.65mm.

5. The imaging lens assembly according to claim 1, characterized in that: The focal length of the fifth lens is f5, the focal length of the sixth lens is f6, and the following condition is satisfied: 0.73<f5 / f6<12.

36.

6. The imaging lens assembly according to claim 5, characterized in that: The curvature radius of the object-side surface of the fourth lens is R7, the curvature radius of the object-side surface of the seventh lens is R13, and the following condition is satisfied: 4.35<R7 / R13<9.

18.

7. The imaging lens assembly according to claim 1, characterized in that: The focal length of the second lens is f2, the radius of curvature of the object side surface of the first lens is R1, the radius of curvature of the image side surface of the sixth lens is R12, and the following conditions are met: -32.47 mm <f2*(R1 / R12)<-9.59mm。 8. The imaging lens assembly according to claim 7, characterized in that: The curvature radius of the image side surface of the first lens is R2, the curvature radius of the image side surface of the seventh lens is R14, and the following conditions are satisfied: -0.14 <R2 / R14<2.23。 9. The imaging lens assembly according to claim 1, characterized in that: The dispersion coefficient of the third lens is Vd3, the dispersion coefficient of the fifth lens is Vd5, the dispersion coefficient of the seventh lens is Vd7, and the dispersion coefficient of the eighth lens is Vd8, and the following condition is satisfied: 2.09<(Vd7+Vd8) / (Vd3+Vd5)<3.

22.

10. The imaging lens assembly according to claim 1, characterized in that: Half of the maximum viewing angle in the imaging lens group is HFOV, 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 lens group is IMH, and the following conditions are met: 0.92<Tan(HFOV)*TL / IMH<1.

51.

11. The imaging lens assembly according to claim 1, characterized in that: The focal length of the first lens is f1, the radius of curvature of the object side surface of the sixth lens is R11, and the following conditions are met: 0.79 <f1 / R11<1.65。 12. The imaging lens assembly according to claim 1, characterized in that: The overall focal length of the imaging lens group is f, the focal length of the fourth lens is f4, and the following condition is satisfied: 0.29<f / f4<0.

5.

13. The imaging lens assembly according to claim 1, characterized in that: The focal length of the third lens is f3, the maximum viewing angle in the imaging lens group is FOV, the angle of the maximum viewing angle principal ray of the imaging lens group incident on the imaging surface is CRA, and the following conditions are satisfied: -209.04mm<f3*(FOV / CRA)<-51.63mm.

14. The imaging lens assembly according to claim 13, characterized in that: The focal length of the third lens is f3, the focal length of the fourth lens is f4, the focal length of the seventh lens is f7, and the focal length of the eighth lens is f8, and the following condition is satisfied: 3.97<f3 / f8+f4 / f7<21.

89.

15. The imaging lens assembly according to claim 1, characterized in that: The angle of the main light of the maximum viewing angle of the imaging lens group incident on the imaging plane is CRA, the maximum effective radius of the image side surface of the eighth lens is CA16, the maximum imaging height of the imaging lens group is IMH, the incident pupil diameter of the imaging lens group is EPD, the maximum effective radius of the object side surface of the first lens is CA1, and the following conditions are satisfied: 22.18°<CRA*CA16 / IMH<40.26° and 6.46mm<EPD*(CA16 / CA1)<11.65mm.

Images