Imaging lens group and camera module

Abstract

The present invention provides an imaging lens assembly comprising, from the object side to the image side, an aperture; a first lens element having positive refractive power; a second lens element having negative refractive power; a third lens element having positive refractive power; a fourth lens element having positive refractive power; and a fifth lens element having negative refractive power. The imaging lens assembly has a half-maximum viewing angle (HFOV) of 0.5, a radius of curvature (R9) of the object-side surface of the fifth lens element, and an overall focal length (f) of 0.5, satisfying the following condition: -79.81 < HFOV*R9 / f < -38.47.

Description

Technical Field

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

[0002] High-quality, miniaturized camera modules are now standard equipment in current mobile devices. Advances in semiconductor manufacturing have resulted in increasingly smaller pixel sizes on image sensors, necessitating finer resolution for even more detailed images. However, conventional camera modules used in mobile devices such as mobile phones, tablets, and other wearable electronic devices often face manufacturing and assembly sensitivity issues when using large apertures, complicating mass production and increasing production costs. Alternatively, to reduce assembly tolerances, peripheral image quality may be compromised, resulting in blurred or distorted images.

[0003] Therefore, how to provide a high-resolution camera module with low manufacturing and assembly tolerances is a technical bottleneck that needs to be overcome urgently. Summary of the Invention

[0004] The present invention provides an imaging lens assembly and a camera module. The imaging lens assembly comprises five refractive lenses. When certain conditions are met, the imaging lens assembly can provide a large aperture, a wide viewing angle, and high resolution, while maintaining tight assembly tolerances.

[0005] The present invention provides an imaging lens assembly, which comprises, from the object side to the image side, an aperture; a first lens having positive refractive power, wherein the object side surface of the first lens is convex near the optical axis, and the image side surface of the first lens is concave near the optical axis, and both the object side surface and the image side surface are aspherical; a second lens having negative refractive power, wherein the object side surface of the second lens is convex near the optical axis, and the image side surface of the second lens is concave near the optical axis, and both the object side surface and the image side surface are aspherical; a third lens having positive a third lens element having a convex image-side surface near the optical axis, and both its object-side and image-side surfaces are aspherical; a fourth lens element having a positive refracting power, the object-side surface of the fourth lens element being concave near the optical axis, the image-side surface of the fourth lens element being convex near the optical axis, and both its object-side and image-side surfaces are aspherical; and a fifth lens element having a negative refracting power, the object-side surface of the fifth lens element being concave near the optical axis, the image-side surface of the fifth lens element being concave near the optical axis, and both its object-side and image-side surfaces are aspherical;

[0006] Half of the maximum viewing angle in the imaging lens group is HFOV, the radius of curvature of the object-side surface of the fifth lens is R9, the overall focal length of the imaging lens group is f, and the following conditions are satisfied: -79.81 < HFOV * R9 / f < -38.47.

[0007] The efficacy of the present invention is that when the above five refractive power lenses are combined with -79.81 < HFOV * R9 / f < -38.47, it helps to adjust the balance between the focal length of the imaging lens group and the collection of large-angle light, so as to improve the imaging quality of the imaging lens group.

[0008] Preferably, the total number of refractive power lenses in the imaging lens group is five.

[0009] Preferably, the maximum viewing angle in the imaging lens group is FOV, the aperture value of the imaging lens group is Fno, and the following conditions are satisfied: 34.79 < FOV / Fno < 58.02. Thereby, it can effectively collect large-angle light, expand the image reception range, and maintain high resolution.

[0010] Preferably, the maximum viewing angle in the imaging lens group is FOV, the entrance pupil diameter of the imaging lens group is EPD, and the following conditions are satisfied: 28.83 < FOV / EPD < 49.92. Thereby, it can effectively collect large-angle light and expand the image reception range.

[0011] Preferably, the radius of curvature of the object-side surface of the second lens is R3, the radius of curvature of the object-side surface of the first lens is R1, and the following conditions are satisfied: 5.37 < R3 / R1 < 14.28. Thereby, the surface shape changes of the object-side surface of the first lens and the object-side surface of the second lens can be controlled to correct aberration.

[0012] Preferably, there is also an infrared filtering optical component provided between the fifth lens and the imaging surface. The radius of curvature of the object-side surface of the second lens is R3, the radius of curvature of the image-side surface of the fifth lens is R10, and the distance between the fifth lens and the infrared filtering optical component on the optical axis is T5F, and the following conditions are satisfied: 19.76 < (R3 / R10) / T5F < 46.84. Thereby, the spherical aberration and astigmatism of the imaging lens group are effectively reduced.

[0013] Preferably, the radius of curvature of the image-side surface of the first lens is R2, the radius of curvature of the image-side surface of the fourth lens is R8, and the following conditions are satisfied: -6.11 < R2 / R8 < -3.46. Thereby, the spherical aberration and astigmatism of the imaging lens group are effectively reduced.

[0014] Preferably, the radius of curvature R2 of the image-side surface of the first lens and the radius of curvature R10 of the image-side surface of the fifth lens satisfy the following condition: 3.09 < R2 / R10 < 5.81. Thereby, the spherical aberration and astigmatism of the imaging lens group are effectively reduced.

[0015] Preferably, the radius of curvature R3 of the object-side surface of the second lens and the radius of curvature R4 of the image-side surface of the second lens satisfy the following condition: 2.32 < R3 / R4 < 4.46. Thereby, the spherical aberration and astigmatism of the imaging lens group are effectively reduced.

[0016] Preferably, the radius of curvature R3 of the object-side surface of the second lens, the radius of curvature R8 of the image-side surface of the fourth lens, and the distance T34 between the third lens and the fourth lens on the optical axis satisfy the following condition: -41.59 < (R3 / R8) / T34 < -11.45. Thereby, it helps to reduce the spherical aberration and astigmatism of the imaging lens group while miniaturizing.

[0017] Preferably, the radius of curvature R9 of the object-side surface of the fifth lens and the focal length f5 of the fifth lens satisfy the following condition: 1.74 < R9 / f5 < 3.58. Thereby, it helps to correct the higher-order aberration and astigmatism.

[0018] Preferably, the focal length f2 of the second lens and the focal length f4 of the fourth lens satisfy the following condition: -5.56 < f2 / f4 < -2.66. Thereby, the refractive power distribution of the 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.

[0019] Preferably, the focal length f2 of the second lens and the focal length f5 of the fifth lens satisfy the following condition: 3.59 < f2 / f5 < 7. Thereby, 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

[0020] Preferably, the distance TL from the object-side surface of the first lens to the imaging surface on the optical axis and the distance T34 between the third lens and the fourth lens on the optical axis satisfy the following condition: 7.12 < TL / T34 < 13.93. Thereby, it helps to balance the spatial configuration between the third lens and the fourth lens while miniaturizing, so as to reduce the sensitivity and the influence of assembly tolerance of the imaging lens group.

[0021] Preferably, the distance BFL from the image-side surface of the fifth lens to the imaging surface on the optical axis and the thickness CT5 of the fifth lens on the optical axis satisfy the following condition: 1.93 < BFL / CT5 < 3.34. Thereby, it helps to balance miniaturization and the back focal length of the imaging lens group.

[0022] Preferably, the distance from the object side surface of the first lens to the imaging surface on the optical axis is TL, and the distance between the fourth lens and the fifth lens on the optical axis is T45, and the following conditions are satisfied: 8.88 < TL / T45 < 20. Thereby, it helps to balance the spatial configuration between the fourth lens and the fifth lens while miniaturizing, so as to reduce the sensitivity and the influence of assembly tolerance of the imaging lens group.

[0023] Another imaging module provided by the present invention includes: a lens barrel; an imaging lens group disposed in the lens barrel; and an image sensor disposed on the imaging surface of the imaging lens group.

[0024] The imaging lens group includes, in order from the object side to the image side: an aperture; a first lens having a positive refractive power, the object side surface of the first lens is convex near the optical axis, the image side surface of the first lens is concave near the optical axis, and both its object side surface and image side surface are aspherical surfaces; a second lens having a negative refractive power, the object side surface of the second lens is convex near the optical axis, the image side surface of the second lens is concave near the optical axis, and both its object side surface and image side surface are aspherical surfaces; a third lens having a positive refractive power, the image side surface of the third lens is convex near the optical axis, and both its object side surface and image side surface are aspherical surfaces; a fourth lens having a positive refractive power, the object side surface of the fourth lens is concave near the optical axis, the image side surface of the fourth lens is convex near the optical axis, and both its object side surface and image side surface are aspherical surfaces; and a fifth lens having a negative refractive power, the object side surface of the fifth lens is concave near the optical axis, the image side surface of the fifth lens is concave near the optical axis, and both its object side surface and image side surface are aspherical surfaces.

[0025] Where, half of the maximum viewing angle in the imaging lens group is HFOV, the radius of curvature R9 of the object side surface of the fifth lens, and the overall focal length of the imaging lens group is f, and the following conditions are satisfied: -79.81 < HFOV*R9 / f < -38.47.

[0026] The effect of the present invention is that when the above five lenses with refractive power are combined with -79.81 < HFOV*R9 / f < -38.47, it helps to adjust the balance between the focal length of the imaging lens group and the collection of large-angle light, so as to improve the imaging quality of the imaging lens group.

[0027] Preferably, the total number of lenses with refractive power in the imaging lens group is five.

[0028] Preferably, the maximum viewing angle in the imaging lens group is FOV, and the F-number of the imaging lens group is Fno, and the following conditions are satisfied: 34.79 < FOV / Fno < 58.02. Thereby, it can effectively collect large-angle light, expand the image reception range, and maintain high resolution.

[0029] Preferably, the maximum viewing angle of the imaging lens group is FOV, the entrance pupil diameter of the imaging lens group is EPD, and the following conditions are satisfied: 28.83 < FOV / EPD < 49.92. Thereby, large-angle light can be effectively collected and the image reception range can be expanded.

[0030] Preferably, the radius of curvature R3 of the object side surface of the second lens and the radius of curvature R1 of the object side surface of the first lens satisfy the following conditions: 5.37 < R3 / R1 < 14.28. Thereby, the surface shape changes of the object side surface of the first lens and the object side surface of the second lens can be controlled to correct aberration.

[0031] Preferably, there is also an infrared filtering optical component provided between the fifth lens and the imaging surface. The radius of curvature R3 of the object side surface of the second lens, the radius of curvature R10 of the image side surface of the fifth lens, and the distance T5F between the fifth lens and the infrared filtering optical component on the optical axis satisfy the following conditions: 19.76 < (R3 / R10) / T5F < 46.84. Thereby, the spherical aberration and astigmatism of the imaging lens group can be effectively reduced.

[0032] Preferably, the radius of curvature R2 of the image side surface of the first lens and the radius of curvature R8 of the image side surface of the fourth lens satisfy the following conditions: -6.11 < R2 / R8 < -3.46. Thereby, the spherical aberration and astigmatism of the imaging lens group can be effectively reduced.

[0033] Preferably, the radius of curvature R2 of the image side surface of the first lens and the radius of curvature R10 of the image side surface of the fifth lens satisfy the following conditions: 3.09 < R2 / R10 < 5.81. Thereby, the spherical aberration and astigmatism of the imaging lens group can be effectively reduced.

[0034] Preferably, the radius of curvature R3 of the object side surface of the second lens and the radius of curvature R4 of the image side surface of the second lens satisfy the following conditions: 2.32 < R3 / R4 < 4.46. Thereby, the spherical aberration and astigmatism of the imaging lens group can be effectively reduced.

[0035] Preferably, the radius of curvature R3 of the object side surface of the second lens, the radius of curvature R8 of the image side surface of the fourth lens, and the distance T34 between the third lens and the fourth lens on the optical axis satisfy the following conditions: -41.59 < (R3 / R8) / T34 < -11.45. Thereby, it helps to reduce the spherical aberration and astigmatism of the imaging lens group while miniaturizing.

[0036] Preferably, the radius of curvature R9 of the object side surface of the fifth lens, the focal length of the fifth lens is f5, and the following conditions are satisfied: 1.74 < R9 / f5 < 3.58. Thereby, it helps to correct higher-order aberrations and astigmatism.

[0037] Preferably, the focal length of the second lens is f2, the focal length of the fourth lens is f4, and the following conditions are satisfied: -5.56 < f2 / f4 < -2.66. Thereby, the refractive power distribution of the lens group is more appropriate, which is beneficial to correcting the aberrations of the imaging lens group to improve the imaging quality of the imaging lens group.

[0038] Preferably, the focal length of the second lens is f2, the focal length of the fifth lens is f5, and the following conditions are satisfied: 3.59 < f2 / f5 < 7. Thereby, the refractive power distribution of the imaging lens group is more appropriate, which is beneficial to correcting the aberrations of the imaging lens group to improve the imaging quality of the imaging lens group.

[0039] Preferably, the distance from the object side surface of the first lens to the imaging surface on the optical axis is TL, the distance between the third lens and the fourth lens on the optical axis is T34, and the following conditions are satisfied: 7.12 < TL / T34 < 13.93. Thereby, it helps to balance the spatial configuration between the third lens and the fourth lens while miniaturizing, so as to reduce the sensitivity and the influence of assembly tolerances of the imaging lens group.

[0040] Preferably, the distance from the image side surface of the fifth lens to the imaging surface on the optical axis is BFL, the thickness of the fifth lens on the optical axis is CT5, and the following conditions are satisfied: 1.93 < BFL / CT5 < 3.34. Thereby, it helps to balance miniaturization and the back focal length of the imaging lens group.

[0041] Preferably, the distance from the object side surface of the first lens to the imaging surface on the optical axis is TL, the distance between the fourth lens and the fifth lens on the optical axis is T45, and the following conditions are satisfied: 8.88 < TL / T45 < 20. Thereby, it helps to balance the spatial configuration between the fourth lens and the fifth lens while miniaturizing, so as to reduce the sensitivity and the influence of assembly tolerances of the imaging lens group.

[0042] For each of the above imaging lens groups or each camera module, the overall focal length of the imaging lens group is f, and the following conditions are satisfied: 2.98 (mm) < f < 4.96 (mm).

[0043] For each of the above imaging lens groups or each camera module, the f-number of the imaging lens group is Fno, and the following conditions are satisfied: 1.43 < Fno < 2.24.

[0044] Each of the above imaging lens groups or each camera module, where the maximum viewing angle of the imaging lens group is FOV, and the following conditions are satisfied: 64.67 (degrees) < FOV < 103.77 (degrees).

[0045] Each of the above imaging lens groups or each camera module, where the entrance pupil diameter of the imaging lens group is EPD, and the following conditions are satisfied: 1.66 < EPD < 2.69.

[0046] Each of the above imaging lens groups or each camera module, where the focal length of the first lens is f1 and the focal length of the fifth lens is f5, and the following conditions are satisfied: -2.53 < f1 / f5 < -1.35. Thereby, 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.

[0047] Each of the above imaging lens groups or each camera module, where the radius of curvature R2 of the image side surface of the first lens and the radius of curvature R3 of the object side surface of the second lens satisfy the following conditions: 0.25 < R2 / R3 < 0.70. Thereby, the spherical aberration and astigmatism of the imaging lens group are effectively reduced.

[0048] Each of the above imaging lens groups or each camera module, where the radius of curvature R9 of the object side surface of the fifth lens and the radius of curvature R2 of the image side surface of the first lens satisfy the following conditions: -1.12 < R9 / R2 < -0.6. Thereby, the spherical aberration and astigmatism of the imaging lens group are effectively reduced.

[0049] Each of the above imaging lens groups or each camera module, where the thickness CT4 of the fourth lens on the optical axis and the thickness CT3 of the third lens on the optical axis satisfy the following conditions: 1.13 < CT4 / CT3 < 2.26. Thereby, the thicknesses of the third lens and the fourth lens can be balanced, which helps to achieve an appropriate balance between miniaturization and lens formability.

[0050] Each of the above imaging lens groups or each camera module, where the distance BFL from the image side surface of the fifth lens to the imaging surface on the optical axis and the distance TL from the object side surface of the first lens to the imaging surface on the optical axis satisfy the following conditions: 0.17 < BFL / TL < 0.27. Thereby, it helps to miniaturize the imaging lens group and maintain better performance.

[0051] Each of the above imaging lens groups or each camera module, where the focal length of the fourth lens is f4 and the focal length of the fifth lens is f5, and the following conditions are satisfied: -1.64 < f4 / f5 < -0.98. Thereby, 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. Description of the Drawings

[0052] Figure 1A FIG. 4 is a schematic diagram of an imaging lens assembly according to a first embodiment of the present invention.

[0053] Figure 1B From left to right are the image curvature and distortion aberration curves of the imaging lens unit of the first embodiment.

[0054] Figure 2A FIG. 4 is a schematic diagram of an imaging lens assembly according to a second embodiment of the present invention.

[0055] Figure 2B From left to right are the image curvature and distortion aberration curves of the imaging lens unit of the second embodiment.

[0056] Figure 3A FIG. 4 is a schematic diagram of an imaging lens assembly according to a third embodiment of the present invention.

[0057] Figure 3B From left to right are the image curvature and distortion aberration curves of the imaging lens unit of the third embodiment.

[0058] Figure 4A FIG. 4 is a schematic diagram of an imaging lens assembly according to a fourth embodiment of the present invention.

[0059] Figure 4B From left to right are the image curvature and distortion aberration curves of the imaging lens unit of the fourth embodiment.

[0060] Figure 5A FIG. 4 is a schematic diagram of an imaging lens assembly according to a fifth embodiment of the present invention.

[0061] Figure 5B From left to right are the image curvature and distortion aberration curves of the imaging lens unit of the fifth embodiment.

[0062] Figure 6A FIG. 4 is a schematic diagram of an imaging lens assembly according to a sixth embodiment of the present invention.

[0063] Figure 6B From left to right are the image curvature and distortion aberration curves of the imaging lens unit of the sixth embodiment.

[0064] Figure 7A FIG. 4 is a schematic diagram of an imaging lens assembly according to a seventh embodiment of the present invention.

[0065] Figure 7B From left to right are the image curvature and distortion aberration curves of the imaging lens unit of the seventh embodiment.

[0066] Figure 8A FIG. 4 is a schematic diagram of an imaging lens assembly according to an eighth embodiment of the present invention.

[0067] Figure 8BFrom left to right are the image curvature and distortion aberration curves of the imaging lens unit of the eighth embodiment.

[0068] Figure 9A FIG. 4 is a schematic diagram of an imaging lens assembly according to a ninth embodiment of the present invention.

[0069] Figure 9B From left to right are the image curvature and distortion aberration curves of the imaging lens unit of the ninth embodiment.

[0070] Figure 10 FIG. 1 is a schematic diagram of a camera module according to a tenth embodiment of the present invention.

[0071] Description of reference numerals:

[0072] 100, 200, 300, 400, 500, 600, 700, 800, 900: aperture

[0073] 110, 210, 310, 410, 510, 610, 710, 810, 910: First lens

[0074] 111, 211, 311, 411, 511, 611, 711, 811, 911: Object side surface

[0075] 112, 212, 312, 412, 512, 612, 712, 812, 912: Image side surface

[0076] 120, 220, 320, 420, 520, 620, 720, 820, 920: Second lens

[0077] 121, 221, 321, 421, 521, 621, 721, 821, 921: Object side surface

[0078] 122, 222, 322, 422, 522, 622, 722, 822, 922: Image side surface

[0079] 130, 230, 330, 430, 530, 630, 730, 830, 930: Third lens

[0080] 131, 231, 331, 431, 531, 631, 731, 831, 931: Object side surface

[0081] 132, 232, 332, 432, 532, 632, 732, 832, 932: Image side surface

[0082] 140, 240, 340, 440, 540, 640, 740, 840, 940: Fourth lens

[0083] 141, 241, 341, 441, 541, 641, 741, 841, 941: Object-side surface

[0084] 142, 242, 342, 442, 542, 642, 742, 842, 942: Image side surface

[0085] 150, 250, 350, 450, 550, 650, 750, 850, 950: Fifth lens

[0086] 151, 251, 351, 451, 551, 651, 751, 851, 951: Object side surface

[0087] 152, 252, 352, 452, 552, 652, 752, 852, 952: Image side surface

[0088] 160, 260, 360, 460, 560, 660, 760, 860, 960: Infrared filter components

[0089] 170, 270, 370, 470, 570, 670, 770, 870, 970: imaging surface

[0090] 180, 280, 380, 480, 580, 680, 780, 880, 980: Image sensors

[0091] 190, 290, 390, 490, 590, 690, 790, 890, 990: optical axis

[0092] 10: Camera module

[0093] 11: Lens barrel

[0094] 12: Imaging lens group

[0095] f: overall focal length of the imaging lens group

[0096] Fno: aperture value

[0097] FOV: The maximum viewing angle of the imaging lens group

[0098] EPD: Entrance pupil diameter of the imaging lens group

[0099] HFOV: half of the maximum angle of view in the imaging lens group

[0100] f1: focal length of the first lens

[0101] f2: focal length of the second lens

[0102] f4: focal length of the fourth lens

[0103] f5: focal length of the fifth lens

[0104] R1: The radius of curvature of the object side surface of the first lens

[0105] R2: The curvature radius of the image-side surface of the first lens

[0106] R3: The radius of curvature of the object side surface of the second lens

[0107] R4: The curvature radius of the image-side surface of the second lens

[0108] R8: Radius of curvature of the image-side surface of the fourth lens

[0109] R9: The radius of curvature of the object side surface of the fifth lens

[0110] R10: Radius of curvature of the image-side surface of the fifth lens

[0111] TL: The distance from the object side surface of the first lens to the imaging surface on the optical axis

[0112] BFL: The distance from the image side surface of the fifth lens to the imaging plane on the optical axis

[0113] T34: The distance between the third lens and the fourth lens on the optical axis

[0114] T45: The distance between the fourth lens and the fifth lens on the optical axis

[0115] CT3: Thickness of the third lens on the optical axis

[0116] CT4: Thickness of the fourth lens on the optical axis

[0117] CT5: The thickness of the fifth lens on the optical axis. DETAILED DESCRIPTION

[0118] <First embodiment>

[0119] Please refer to Figure 1A and Figure 1B ,in Figure 1A FIG2 is a schematic diagram showing an imaging lens assembly according to a first embodiment of the present invention. Figure 1B From left to right are the image plane curvature and distortion aberration curves of the imaging lens unit of the first embodiment. Figure 1AAs can be seen, the imaging lens assembly includes, in order from the object side to the image side along optical axis 190, an aperture 100, a first lens 110, a second lens 120, a third lens 130, a fourth lens 140, a fifth lens 150, an infrared cut filter 160, and an imaging surface 170. This imaging lens assembly is used in conjunction with an image sensor 180. The imaging lens assembly comprises five lenses with refractive power, but this is not a limitation. The aperture 100 is positioned between the subject and the first lens 110. The image sensor 180 is positioned on the imaging surface 170.

[0120] The first lens 110 has positive refractive power and is made of plastic. Its object-side surface 111 is convex near the optical axis 190 , and its image-side surface 112 is concave near the optical axis 190 . Both the object-side surface 111 and the image-side surface 112 are aspherical.

[0121] The second lens 120 has negative refractive power and is made of plastic. Its object-side surface 121 is convex near the optical axis 190 , and its image-side surface 122 is concave near the optical axis 190 . Both the object-side surface 121 and the image-side surface 122 are aspherical.

[0122] The third lens 130 has positive refractive power and is made of plastic. Its object-side surface 131 is concave near the optical axis 190 , and its image-side surface 132 is convex near the optical axis 190 . Both the object-side surface 131 and the image-side surface 132 are aspherical.

[0123] The fourth lens 140 has positive refractive power and is made of plastic. Its object-side surface 141 is concave near the optical axis 190 , and its image-side surface 142 is convex near the optical axis 190 . Both the object-side surface 141 and the image-side surface 142 are aspherical.

[0124] The fifth lens element 150 has negative refractive power and is made of plastic. Its object-side surface 151 is concave near the optical axis 190 , and its image-side surface 152 is concave near the optical axis 190 . Both the object-side surface 151 and the image-side surface 152 are aspherical.

[0125] The IR-cut filter 160 is made of glass and is disposed between the fifth lens 150 and the imaging surface 170 without affecting the focal length of the imaging lens group. It is understood that the IR-cut filter 160 can also be formed on the lens surface, and the IR-cut filter 160 can also be made of other materials.

[0126] The curve equations of the aspheric surfaces of the above lenses are expressed as follows:

[0127]

[0128] Where z is the position value at a height h along the optical axis 190 with reference to the surface vertex; c is the curvature of the lens surface near the optical axis 190 and is the inverse of the radius of curvature (R) (c = 1 / R), R is the radius of curvature of the lens surface near the optical axis 190, h is the vertical distance of the lens surface from the optical axis 190, k is the conic constant, and Ai is the i-th order aspheric coefficient.

[0129] In the imaging lens assembly of the first embodiment, the overall focal length of the imaging lens assembly is f, the aperture value (f-number) of the imaging lens assembly is Fno, the maximum viewing angle of the imaging lens assembly is FOV, and the entrance pupil diameter of the imaging lens assembly is EPD, whose values are as follows: f = 4.01 (mm); Fno = 1.86; FOV = 82.89 (degrees); and EPD = 2.15 (mm). Furthermore, the following conditions are satisfied: FOV / Fno = 44.56 (degrees); FOV / EPD = 38.48 (degrees / mm).

[0130] In the imaging lens group of the first embodiment, half of the maximum viewing angle in the imaging lens group is HFOV, the curvature radius of the object side surface of the fifth lens is R9, the overall focal length of the imaging lens group is f, and the following conditions are satisfied: HFOV*R9 / f=-59.73 (degrees).

[0131] In the imaging lens assembly of the first embodiment, the curvature radius R3 of the object-side surface 121 of the second lens 120 and the curvature radius R1 of the object-side surface 111 of the first lens 110 satisfy the following condition R3 / R1=11.90.

[0132] In the imaging lens assembly of the first embodiment, the curvature radius R3 of the object-side surface 121 of the second lens 120, the curvature radius R10 of the image-side surface 152 of the fifth lens 150, and the spacing between the fifth lens 150 and the infrared cutoff filter assembly 160 on the optical axis 190 is T5F, and the following condition is satisfied: (R3 / R10) / T5F=37.42 (1 / mm).

[0133] In the imaging lens assembly of the first embodiment, the curvature radius R2 of the image-side surface 112 of the first lens 110 and the curvature radius R8 of the image-side surface 142 of the fourth lens 140 satisfy the following condition: R2 / R8=-4.88.

[0134] In the imaging lens assembly of the first embodiment, the curvature radius R2 of the image-side surface 112 of the first lens 110 and the curvature radius R10 of the image-side surface 152 of the fifth lens 150 satisfy the following condition: R2 / R10=4.58.

[0135] In the imaging lens assembly of the first embodiment, the curvature radius R3 of the object-side surface 121 of the second lens 120 and the curvature radius R4 of the image-side surface 122 of the second lens 120 satisfy the following condition: R3 / R4=3.71.

[0136] In the imaging lens group of the first embodiment, the curvature radius R3 of the object-side surface 121 of the second lens 120, the curvature radius R8 of the image-side surface 142 of the fourth lens 140, and the spacing distance between the third lens 130 and the fourth lens 140 on the optical axis 190 is T34, and the following condition is satisfied: (R3 / R8) / T34=-34.16 (1 / mm).

[0137] In the imaging lens assembly of the first embodiment, the curvature radius of the object-side surface 151 of the fifth lens 150 is R9, the focal length of the fifth lens 150 is f5, and the following condition is satisfied: R9 / f5=2.94.

[0138] In the imaging lens assembly of the first embodiment, the focal length of the second lens 120 is f2, the focal length of the fourth lens 140 is f4, and the following condition is satisfied: f2 / f4=-4.29.

[0139] In the imaging lens assembly of the first embodiment, the focal length of the second lens 120 is f2, the focal length of the fifth lens 150 is f5, and the following condition is satisfied: f2 / f5=5.47.

[0140] In the imaging lens assembly of the first embodiment, the distance between the object-side surface 111 of the first lens 110 and the imaging plane 180 on the optical axis 190 is TL, and the distance between the third lens 130 and the fourth lens 140 on the optical axis 190 is T34, and the following condition is satisfied: TL / T34=10.94.

[0141] In the imaging lens assembly of the first embodiment, the distance between the image-side surface 152 of the fifth lens element 150 and the imaging plane 180 on the optical axis 190 is BFL, the thickness of the fifth lens element 150 on the optical axis 190 is CT5, and the following condition is satisfied: BFL / CT5=2.57.

[0142] In the imaging lens assembly of the first embodiment, the distance between the object-side surface 111 of the first lens 110 and the imaging plane 180 on the optical axis 190 is TL, and the distance between the fourth lens 140 and the fifth lens 150 on the optical axis 190 is T45, and the following condition is satisfied: TL / T45=15.85.

[0143] In the imaging lens assembly of the first embodiment, the focal length of the first lens 110 is f1, the focal length of the fifth lens 150 is f5, and the following condition is satisfied: f1 / f5=-2.04.

[0144] In the imaging lens assembly of the first embodiment, the curvature radius R2 of the image-side surface 112 of the first lens 110 and the curvature radius R3 of the object-side surface 121 of the second lens 120 satisfy the following condition: R2 / R3=0.31.

[0145] In the imaging lens assembly of the first embodiment, the curvature radius R9 of the object-side surface 151 of the fifth lens 150 and the curvature radius R2 of the image-side surface 112 of the first lens 110 satisfy the following condition: R9 / R2=-0.93.

[0146] In the imaging lens assembly of the first embodiment, the thickness of the fourth lens 140 on the optical axis 190 is CT4, the thickness of the third lens 130 on the optical axis 190 is CT3, and the following condition is satisfied: CT4 / CT3=1.77.

[0147] In the imaging lens group of the first embodiment, the distance between the image-side surface 152 of the fifth lens 150 and the imaging plane 180 on the optical axis 190 is BFL, and the distance between the object-side surface 111 of the first lens 110 and the imaging plane 180 on the optical axis 190 is TL, and the following condition is satisfied: BFL / TL=0.22.

[0148] In the imaging lens assembly of the first embodiment, the focal length of the fourth lens 140 is f4, the focal length of the fifth lens 150 is f5, and the following condition is satisfied: f4 / f5=-1.28.

[0149] Please refer to Table 1 and Table 2 below.

[0150]

[0151]

[0152]

[0153]

[0154] Table 1 is Figure 1ADetailed structural data of the first embodiment, where the units of curvature radius, thickness, gap, and focal length are in mm, and surfaces 0-14 represent surfaces from the object side to the image side, wherein surface 0 is the gap between the object and the aperture 100 on the optical axis 190; surface 1 is the gap between the aperture 100 and the object side surface 111 of the first lens 110 on the optical axis 190. Since the aperture 100 is farther away from the object side than the object side surface 111 of the first lens 110, it is represented by a negative value; surfaces 2, 4, 6, 8, 10, and 12 are the first lens 110, the second lens 120, the third lens 130, the fourth lens 140, the fifth lens 150, and the infrared filter, respectively. Thickness of the filter assembly 160 on the optical axis 190; surface 3 represents the gap between the first lens 110 and the second lens 120 on the optical axis 190; surface 5 represents the gap between the second lens 120 and the third lens 30 on the optical axis 190; surface 7 represents the gap between the third lens 130 and the fourth lens 140 on the optical axis 190; surface 9 represents the gap between the fourth lens 140 and the fifth lens 150 on the optical axis 190; surface 11 represents the gap between the fifth lens 150 and the infrared-cutting filter assembly 160 on the optical axis 190; and surface 13 represents the gap between the infrared-cutting filter assembly 160 and the imaging plane 170 on the optical axis 190.

[0155] Table 2 shows the aspheric surface data for the first embodiment, where k is the conic coefficient in the aspheric curve equation, and A2, A4, A6, A8, A10, A12, A14, A16, A18, and A20 are high-order aspheric coefficients. Furthermore, the tables below correspond to the schematic diagrams and image curvature curves of each embodiment. The definitions of the data in the tables are the same as those in Tables 1 and 2 of the first embodiment and are not further elaborated here.

[0156] <Second embodiment>

[0157] Please refer to Figure 2A and Figure 2B ,in Figure 2A FIG2 is a schematic diagram showing an imaging lens assembly according to a second embodiment of the present invention. Figure 2B From left to right are the image plane curvature and distortion aberration curves of the imaging lens unit of the second embodiment. Figure 2A As can be seen, the imaging lens assembly includes, in order from the object side to the image side along optical axis 290, an aperture 200, a first lens 210, a second lens 220, a third lens 230, a fourth lens 240, a fifth lens 250, an infrared cut filter 260, and an imaging surface 270. This imaging lens assembly is used in conjunction with an image sensor 280. The imaging lens assembly comprises five lenses with refractive power, but this is not a limitation. The aperture 200 is positioned between the object and the first lens 210. The image sensor 280 is positioned on the imaging surface 270.

[0158] The first lens 210 has positive refractive power and is made of plastic. Its object-side surface 211 is convex near the optical axis 290 , and its image-side surface 212 is concave near the optical axis 290 . Both the object-side surface 211 and the image-side surface 212 are aspherical.

[0159] The second lens 220 has negative refractive power and is made of plastic. Its object-side surface 221 is convex near the optical axis 290 , and its image-side surface 222 is concave near the optical axis 290 . Both the object-side surface 221 and the image-side surface 222 are aspherical.

[0160] The third lens 230 has positive refractive power and is made of plastic. Its object-side surface 231 is concave near the optical axis 290 , and its image-side surface 232 is convex near the optical axis 290 . Both the object-side surface 231 and the image-side surface 232 are aspherical.

[0161] The fourth lens 240 has positive refractive power and is made of plastic. Its object-side surface 241 is concave near the optical axis 290 , and its image-side surface 242 is convex near the optical axis 290 . Both the object-side surface 241 and the image-side surface 242 are aspherical.

[0162] The fifth lens element 250 has negative refractive power and is made of plastic. Its object-side surface 251 is concave near the optical axis 290 , and its image-side surface 252 is concave near the optical axis 290 . Both the object-side surface 251 and the image-side surface 252 are aspherical.

[0163] The infrared cut filter component (IR-cut filter) 260 is made of glass. It is disposed between the fifth lens 250 and the imaging surface 270 and does not affect the focal length of the imaging lens group. It can be understood that the infrared cut filter component 260 can also be formed on the lens surface. The infrared cut filter component 260 can also be made of other materials.

[0164] Please refer to Table 3 and Table 4 below.

[0165]

[0166]

[0167]

[0168] 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.

[0169] The following data can be calculated by combining Table 3 and Table 4:

[0170]

[0171] <Third embodiment>

[0172] Please refer to Figure 3A and Figure 3B ,in Figure 3A FIG. 1 is a schematic diagram illustrating an imaging lens assembly according to a third embodiment of the present invention. Figure 3B From left to right are the image plane curvature and distortion aberration curves of the imaging lens unit of the third embodiment. Figure 3A As can be seen, the imaging lens assembly includes, in order from the object side to the image side along optical axis 390, an aperture 300, a first lens 310, a second lens 320, a third lens 330, a fourth lens 340, a fifth lens 350, an infrared cut filter 360, and an imaging surface 370. This imaging lens assembly is used in conjunction with an image sensor 380. The imaging lens assembly comprises five lenses with refractive power, but this is not a limitation. The aperture 300 is positioned between the subject and the first lens 310. The image sensor 380 is positioned on the imaging surface 370.

[0173] The first lens 310 has positive refractive power and is made of plastic. Its object-side surface 311 is convex near the optical axis 390 , and its image-side surface 312 is concave near the optical axis 390 . Both the object-side surface 311 and the image-side surface 312 are aspherical.

[0174] The second lens 320 has negative refractive power and is made of plastic. Its object-side surface 321 is convex near the optical axis 390 , and its image-side surface 322 is concave near the optical axis 390 . Both the object-side surface 321 and the image-side surface 322 are aspherical.

[0175] The third lens 330 has positive refractive power and is made of plastic. Its object-side surface 331 is concave near the optical axis 390 , and its image-side surface 332 is convex near the optical axis 390 . Both the object-side surface 331 and the image-side surface 332 are aspherical.

[0176] The fourth lens 340 has positive refractive power and is made of plastic. Its object-side surface 341 is concave near the optical axis 390 , and its image-side surface 342 is convex near the optical axis 390 . Both the object-side surface 341 and the image-side surface 342 are aspherical.

[0177] The fifth lens element 350 has negative refractive power and is made of plastic. Its object-side surface 351 is concave near the optical axis 390 , and its image-side surface 352 is concave near the optical axis 390 . Both the object-side surface 351 and the image-side surface 352 are aspherical.

[0178] The infrared cut filter component (IR-cut filter) 360 is made of glass and is disposed between the fifth lens 350 and the imaging surface 370 without affecting the focal length of the imaging lens group. It is understood that the infrared cut filter component 360 can also be formed on the lens surface, and the infrared cut filter component 360 can also be made of other materials.

[0179] Please refer to Table 5 and Table 6 below.

[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 Table 5 and Table 6:

[0185]

[0186]

[0187] <Fourth embodiment>

[0188] Please refer to Figure 4A and Figure 4B ,in Figure 4A FIG. 1 is a schematic diagram illustrating an imaging lens assembly according to a fourth embodiment of the present invention. Figure 4B From left to right are the image plane curvature and distortion aberration curves of the imaging lens unit of the fourth embodiment. Figure 4A As can be seen, the imaging lens assembly includes, in order from the object side to the image side along optical axis 490, an aperture 400, a first lens 410, a second lens 420, a third lens 430, a fourth lens 440, a fifth lens 450, an infrared cut filter 460, and an imaging surface 470. This imaging lens assembly is used in conjunction with an image sensor 480. The imaging lens assembly comprises five lenses with refractive power, but this is not a limitation. The aperture 400 is positioned between the subject and the first lens 410. The image sensor 480 is positioned on the imaging surface 470.

[0189] The first lens 410 has positive refractive power and is made of plastic. Its object-side surface 411 is convex near the optical axis 490 , and its image-side surface 412 is concave near the optical axis 490 . Both the object-side surface 411 and the image-side surface 412 are aspherical.

[0190] The second lens 420 has negative refractive power and is made of plastic. Its object-side surface 421 is convex near the optical axis 490 , and its image-side surface 422 is concave near the optical axis 490 . Both the object-side surface 421 and the image-side surface 422 are aspherical.

[0191] The third lens 430 has positive refractive power and is made of plastic. Its object-side surface 431 is convex near the optical axis 490 , and its image-side surface 432 is convex near the optical axis 490 . Both the object-side surface 431 and the image-side surface 432 are aspherical.

[0192] The fourth lens element 440 has positive refractive power and is made of plastic. Its object-side surface 441 is concave near the optical axis 490 , and its image-side surface 442 is convex near the optical axis 490 . Both the object-side surface 441 and the image-side surface 442 are aspherical.

[0193] The fifth lens element 450 has negative refractive power and is made of plastic. Its object-side surface 451 is concave near the optical axis 490 , and its image-side surface 452 is concave near the optical axis 490 . Both the object-side surface 451 and the image-side surface 452 are aspherical.

[0194] The infrared-cut filter component 460 is made of glass and is disposed between the fifth lens 450 and the imaging surface 470 without affecting the focal length of the imaging lens group. It is understood that the infrared-cut filter component 460 can also be formed on the lens surface, and the infrared-cut filter component 460 can also be made of other materials.

[0195] Please refer to Table 7 and Table 8 below.

[0196]

[0197]

[0198]

[0199] 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.

[0200] The following data can be calculated by combining Table 7 and Table 8:

[0201]

[0202] <Fifth embodiment>

[0203] Please refer to Figure 5A and Figure 5B ,in Figure 5AFIG2 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 image plane curvature and distortion aberration curves of the imaging lens unit of the fifth embodiment. Figure 5A As can be seen, the imaging lens assembly includes, in order from the object side to the image side along optical axis 590, an aperture 500, a first lens 510, a second lens 520, a third lens 530, a fourth lens 540, a fifth lens 550, an infrared cut filter 560, and an imaging surface 570. This imaging lens assembly is used in conjunction with an image sensor 580. The imaging lens assembly comprises five lenses with refractive power, but this is not a limitation. The aperture 500 is disposed between the subject and the first lens 510. The image sensor 580 is disposed on the imaging surface 570.

[0204] The first lens 510 has positive refractive power and is made of plastic. Its object-side surface 511 is convex near the optical axis 590 , and its image-side surface 512 is concave near the optical axis 590 . Both the object-side surface 511 and the image-side surface 512 are aspherical.

[0205] The second lens 520 has negative refractive power and is made of plastic. Its object-side surface 521 is convex near the optical axis 590 , and its image-side surface 522 is concave near the optical axis 590 . Both the object-side surface 521 and the image-side surface 522 are aspherical.

[0206] The third lens 530 has positive refractive power and is made of plastic. Its object-side surface 531 is convex near the optical axis 590 , and its image-side surface 532 is convex near the optical axis 590 . Both the object-side surface 531 and the image-side surface 532 are aspherical.

[0207] The fourth lens 540 has positive refractive power and is made of plastic. Its object-side surface 541 is concave near the optical axis 590 , and its image-side surface 542 is convex near the optical axis 590 . Both the object-side surface 541 and the image-side surface 542 are aspherical.

[0208] The fifth lens element 550 has negative refractive power and is made of plastic. Its object-side surface 551 is concave near the optical axis 590 , and its image-side surface 552 is concave near the optical axis 590 . Both the object-side surface 551 and the image-side surface 552 are aspherical.

[0209] The infrared-cut filter component 560 is made of glass and is disposed between the fifth lens 550 and the imaging surface 570 without affecting the focal length of the imaging lens group. It is understood that the infrared-cut filter component 560 can also be formed on the lens surface, and the infrared-cut filter component 560 can also be made of other materials.

[0210] Please refer to Table 9 and Table 10 below.

[0211]

[0212]

[0213] 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.

[0214] The following data can be calculated by combining Table 9 and Table 10:

[0215]

[0216]

[0217] <Sixth embodiment>

[0218] Please refer to Figure 6A and Figure 6B ,in Figure 6A FIG. 1 is a schematic diagram illustrating an imaging lens assembly according to a sixth embodiment of the present invention. Figure 6B From left to right are the image plane curvature and distortion aberration curves of the imaging lens unit of the sixth embodiment. Figure 6A As can be seen, the imaging lens assembly includes, in order from the object side to the image side along optical axis 690, an aperture 600, a first lens 610, a second lens 620, a third lens 630, a fourth lens 640, a fifth lens 650, an infrared cut filter 660, and an imaging surface 670. This imaging lens assembly is used in conjunction with an image sensor 680. The imaging lens assembly comprises five lenses with refractive power, but this is not a limitation. The aperture 600 is positioned between the subject and the first lens 610. The image sensor 680 is positioned on the imaging surface 670.

[0219] The first lens 610 has positive refractive power and is made of plastic. Its object-side surface 611 is convex near the optical axis 690 , and its image-side surface 612 is concave near the optical axis 690 . Both the object-side surface 611 and the image-side surface 612 are aspherical.

[0220] The second lens 620 has negative refractive power and is made of plastic. Its object-side surface 621 is convex near the optical axis 690 , and its image-side surface 622 is concave near the optical axis 690 . Both the object-side surface 621 and the image-side surface 622 are aspherical.

[0221] The third lens 630 has positive refractive power and is made of plastic. Its object-side surface 631 is convex near the optical axis 690 , and its image-side surface 632 is convex near the optical axis 690 . Both the object-side surface 631 and the image-side surface 632 are aspherical.

[0222] The fourth lens 640 has positive refractive power and is made of plastic. Its object-side surface 641 is concave near the optical axis 690 , and its image-side surface 642 is convex near the optical axis 690 . Both the object-side surface 641 and the image-side surface 642 are aspherical.

[0223] The fifth lens element 650 has negative refractive power and is made of plastic. Its object-side surface 651 is concave near the optical axis 690 , and its image-side surface 652 is concave near the optical axis 690 . Both the object-side surface 651 and the image-side surface 652 are aspherical.

[0224] The IR-cut filter 660 is made of glass and is disposed between the fifth lens 650 and the imaging surface 670 without affecting the focal length of the imaging lens group. It is understood that the IR-cut filter 660 can also be formed on the lens surface, and the IR-cut filter 660 can also be made of other materials.

[0225] Please refer to Table 11 and Table 12 below.

[0226]

[0227]

[0228]

[0229]

[0230] In the sixth embodiment, the curve equation of the aspheric surface is expressed in the same form as in the first embodiment. In addition, the definitions of the parameters in the following table are the same as in the first embodiment and are not repeated here.

[0231] The following data can be calculated by combining Table 11 and Table 12:

[0232]

[0233] <Seventh embodiment>

[0234] Please refer to Figure 7A and Figure 7B ,in Figure 7A FIG2 is a schematic diagram showing an imaging lens assembly according to a seventh embodiment of the present invention. Figure 7B From left to right are the image curvature and distortion aberration curves of the imaging lens unit of the seventh embodiment. Figure 7AAs can be seen, the imaging lens assembly includes, in order from the object side to the image side along optical axis 790, an aperture 700, a first lens 710, a second lens 720, a third lens 730, a fourth lens 740, a fifth lens 750, an infrared cut filter 760, and an imaging surface 770. This imaging lens assembly is used in conjunction with an image sensor 780. The imaging lens assembly comprises five lenses with refractive power, but this is not a limitation. The aperture 700 is positioned between the subject and the first lens 710. The image sensor 780 is positioned on the imaging surface 770.

[0235] The first lens 710 has positive refractive power and is made of plastic. Its object-side surface 711 is convex near the optical axis 790 , and its image-side surface 712 is concave near the optical axis 790 . Both the object-side surface 711 and the image-side surface 712 are aspherical.

[0236] The second lens 720 has negative refractive power and is made of plastic. Its object-side surface 721 is convex near the optical axis 790 , and its image-side surface 722 is concave near the optical axis 790 . Both the object-side surface 721 and the image-side surface 722 are aspherical.

[0237] The third lens 730 has positive refractive power and is made of plastic. Its object-side surface 731 is convex near the optical axis 790 , and its image-side surface 732 is convex near the optical axis 790 . Both the object-side surface 731 and the image-side surface 732 are aspherical.

[0238] The fourth lens 740 has positive refractive power and is made of plastic. Its object-side surface 741 is concave near the optical axis 790 , and its image-side surface 742 is convex near the optical axis 790 . Both the object-side surface 741 and the image-side surface 742 are aspherical.

[0239] The fifth lens element 750 has negative refractive power and is made of plastic. Its object-side surface 751 is concave near the optical axis 790 , and its image-side surface 752 is concave near the optical axis 790 . Both the object-side surface 751 and the image-side surface 752 are aspherical.

[0240] The infrared-cut filter component 760 is made of glass and is disposed between the fifth lens 750 and the imaging surface 770 without affecting the focal length of the imaging lens group. It is understood that the infrared-cut filter component 760 can also be formed on the lens surface, and the infrared-cut filter component 760 can also be made of other materials.

[0241] Please refer to Table 13 and Table 14 below.

[0242]

[0243]

[0244]

[0245] In the seventh embodiment, the curve equation of the aspheric surface is expressed in the same form as in the first embodiment. In addition, the definitions of the parameters in the following table are the same as in the first embodiment and are not repeated here.

[0246] The following data can be calculated by combining Table 13 and Table 14:

[0247]

[0248] <Eighth Embodiment>

[0249] Please refer to Figure 8A and Figure 8B ,in Figure 8A FIG2 is a schematic diagram showing an imaging lens assembly according to an eighth embodiment of the present invention. Figure 8B From left to right are the image plane curvature and distortion aberration curves of the imaging lens unit of the eighth embodiment. Figure 8A As can be seen, the imaging lens assembly includes, in order from the object side to the image side along optical axis 890, an aperture 800, a first lens 810, a second lens 820, a third lens 830, a fourth lens 840, a fifth lens 850, an infrared cut filter 860, and an imaging surface 870. This imaging lens assembly is used in conjunction with an image sensor 880. The imaging lens assembly comprises five lenses with refractive power, but this is not a limitation. The aperture 800 is positioned between the subject and the first lens 810. The image sensor 880 is positioned on the imaging surface 870.

[0250] The first lens 810 has positive refractive power and is made of plastic. Its object-side surface 811 is convex near the optical axis 890, and its image-side surface 812 is concave near the optical axis 890. Both the object-side surface 811 and the image-side surface 812 are aspherical.

[0251] The second lens 820 has negative refractive power and is made of plastic. Its object-side surface 821 is convex near the optical axis 890, and its image-side surface 822 is concave near the optical axis 890. Both the object-side surface 821 and the image-side surface 822 are aspherical.

[0252] The third lens 830 has positive refractive power and is made of plastic. Its object-side surface 831 is convex near the optical axis 890, and its image-side surface 832 is convex near the optical axis 890. Both the object-side surface 831 and the image-side surface 832 are aspherical.

[0253] The fourth lens 840 has positive refractive power and is made of plastic. Its object-side surface 841 is concave near the optical axis 890, and its image-side surface 842 is convex near the optical axis 890. Both the object-side surface 841 and the image-side surface 842 are aspherical.

[0254] The fifth lens element 850 has negative refractive power and is made of plastic. Its object-side surface 851 is concave near the optical axis 890 , and its image-side surface 852 is concave near the optical axis 890 . Both the object-side surface 851 and the image-side surface 852 are aspherical.

[0255] The infrared-cut filter component 860 is made of glass and is disposed between the fifth lens 850 and the imaging surface 870 without affecting the focal length of the imaging lens group. It is understood that the infrared-cut filter component 860 can also be formed on the lens surface, and the infrared-cut filter component 860 can also be made of other materials.

[0256] Please refer to Table 15 and Table 16 below.

[0257]

[0258]

[0259]

[0260] In the eighth embodiment, the curve equation of the aspheric surface is expressed in the same form as in the first embodiment. In addition, the definitions of the parameters in the following table are the same as in the first embodiment and are not repeated here.

[0261] The following data can be calculated by combining Table 15 and Table 16:

[0262]

[0263]

[0264] Ninth embodiment

[0265] Please refer to Figure 9A and Figure 9B ,in Figure 9A FIG2 is a schematic diagram showing an imaging lens assembly according to a ninth embodiment of the present invention. Figure 9B From left to right are the image plane curvature and distortion aberration curves of the imaging lens unit of the ninth embodiment. Figure 9AAs can be seen, the imaging lens assembly includes, from the object side to the image side along optical axis 990, an aperture 900, a first lens 910, a second lens 920, a third lens 930, a fourth lens 940, a fifth lens 950, an infrared cut filter 960, and an imaging surface 970. This imaging lens assembly is used in conjunction with an image sensor 980. The imaging lens assembly comprises five lenses with refractive power, but this is not a limitation. The aperture 900 is positioned between the subject and the first lens 910. The image sensor 980 is positioned on the imaging surface 970.

[0266] The first lens 910 has positive refractive power and is made of plastic. Its object-side surface 911 is convex near the optical axis 990, and its image-side surface 912 is concave near the optical axis 990. Both the object-side surface 911 and the image-side surface 912 are aspherical.

[0267] The second lens 920 has negative refractive power and is made of plastic. Its object-side surface 921 is convex near the optical axis 990, and its image-side surface 922 is concave near the optical axis 990. Both the object-side surface 921 and the image-side surface 922 are aspherical.

[0268] The third lens 930 has positive refractive power and is made of plastic. Its object-side surface 931 is convex near the optical axis 990 , and its image-side surface 932 is convex near the optical axis 990 . Both the object-side surface 931 and the image-side surface 932 are aspherical.

[0269] The fourth lens 940 has positive refractive power and is made of plastic. Its object-side surface 941 is concave near the optical axis 990 , and its image-side surface 942 is convex near the optical axis 990 . Both the object-side surface 941 and the image-side surface 942 are aspherical.

[0270] The fifth lens element 950 has negative refractive power and is made of plastic. Its object-side surface 951 is concave near the optical axis 990 , and its image-side surface 952 is concave near the optical axis 990 . Both the object-side surface 951 and the image-side surface 952 are aspherical.

[0271] The infrared-cut filter component 960 is made of glass and is disposed between the fifth lens 950 and the imaging surface 970 without affecting the focal length of the imaging lens group. It is understood that the infrared-cut filter component 960 can also be formed on the lens surface, and the infrared-cut filter component 960 can also be made of other materials.

[0272] Please refer to Table 17 and Table 18 below.

[0273]

[0274]

[0275]

[0276] In the ninth 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.

[0277] The following data can be calculated by combining Table 17 and Table 18:

[0278]

[0279] <Tenth embodiment>

[0280] Please refer to Figure 10 , depicts a camera module according to the tenth embodiment of the present invention. In this embodiment, the camera module is applied to a notebook computer, but the application is not limited thereto. The camera module 10 further comprises a lens barrel 11, an imaging lens assembly 12, and an image sensor 780. The imaging lens assembly 12 is the imaging lens assembly of the seventh embodiment described above, but the imaging lens assembly of the other embodiments described above may also be used. In addition, Figure 10 The lenses of the imaging lens assembly are depicted to show their peripheral portions where no light is captured, which is slightly different from the lenses of the seventh embodiment. The imaging lens assembly 12 is disposed within the lens barrel 11. The image sensor 780 is disposed on the imaging surface 770 of the imaging lens assembly 12 and is an electronic photosensitive component with excellent brightness and low noise (such as a CMOS or CCD) to truly demonstrate the imaging quality of the imaging lens assembly.

[0281] The imaging lens assembly provided by the present invention can be made of either plastic or glass. Plastic lenses can effectively reduce production costs, while glass lenses can increase the flexibility of refractive power configuration. Furthermore, both the object-side and image-side surfaces of the lenses in the imaging lens assembly can be aspherical. Aspherical surfaces can be easily fabricated into shapes other than spherical surfaces, providing a greater number of control variables for reducing aberrations and, consequently, reducing the number of lenses used. This effectively reduces the overall length of the imaging lens assembly provided by the present invention.

[0282] In the imaging lens assembly provided by the present invention, with respect to a lens having refractive power, if the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at the near optical axis; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at the near optical axis.

[0283] The imaging lens assembly provided by the present invention can be applied to optical systems with mobile focus according to needs, 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, digital cameras, mobile devices, digital drawing tablets, or automotive photography.

[0284] In summary, the above embodiments and drawings are merely preferred embodiments of the present invention and should not be used to limit the scope of implementation of the present invention. In other words, all equivalent changes and modifications made within the scope of the patent application of the present invention should fall within the scope of the patent of the present invention.

Claims

1. An imaging lens assembly, characterized in that: In order from the object side to the image side, it includes: An aperture; A first lens with positive refractive power. The object-side surface of the first lens is convex near the optical axis, and the image-side surface of the first lens is concave near the optical axis. Both the object-side surface and the image-side surface are aspherical surfaces; A second lens with negative refractive power. The object-side surface of the second lens is convex near the optical axis, and the image-side surface of the second lens is concave near the optical axis. Both the object-side surface and the image-side surface are aspherical surfaces; A third lens with positive refractive power. The image-side surface of the third lens is convex near the optical axis. Both the object-side surface and the image-side surface are aspherical surfaces; A fourth lens with positive refractive power. The object-side surface of the fourth lens is concave near the optical axis, and the image-side surface of the fourth lens is convex near the optical axis. Both the object-side surface and the image-side surface are aspherical surfaces; and A fifth lens with negative refractive power. The object-side surface of the fifth lens is concave near the optical axis, and the image-side surface of the fifth lens is concave near the optical axis. Both the object-side surface and the image-side surface are aspherical surfaces; Where the total number of refractive lenses in the imaging lens group is five. Half of the maximum viewing angle in the imaging lens group is HFOV, the radius of curvature R9 of the object-side surface of the fifth lens, the overall focal length of the imaging lens group is f, the radius of curvature R2 of the image-side surface of the first lens, the radius of curvature R3 of the object-side surface of the second lens, and the following conditions are satisfied: -79.81 < HFOV * R9 / f < -38.47 and 0.25 < R2 / R3 < 0.

70.

2. The imaging lens assembly according to claim 1, wherein: The maximum viewing angle in the imaging lens group is FOV, and the f-number of the imaging lens group is Fno, and the following conditions are satisfied: 34.79 < FOV / Fno < 58.

02.

3. The imaging lens assembly according to claim 1, wherein: The maximum viewing angle in the imaging lens group is FOV, and the entrance pupil diameter of the imaging lens group is EPD, and the following conditions are satisfied: 28.83 < FOV / EPD < 49.

92.

4. The imaging lens assembly according to claim 1, wherein: The radius of curvature R3 of the object-side surface of the second lens and the radius of curvature R1 of the object-side surface of the first lens, and the following conditions are satisfied: 5.37 < R3 / R1 < 14.

28.

5. The imaging lens assembly according to claim 1, wherein: There is also an infrared cut-off filter component provided between the fifth lens and the imaging surface. The radius of curvature R3 of the object-side surface of the second lens, the radius of curvature R10 of the image-side surface of the fifth lens, and the distance between the fifth lens and the infrared cut-off filter component on the optical axis is T5F, and the following conditions are satisfied: 19.76 < (R3 / R10) / T5F < 46.

84.

6. The imaging lens assembly according to claim 1, wherein: The radius of curvature R2 of the image-side surface of the first lens and the radius of curvature R8 of the image-side surface of the fourth lens, and the following conditions are satisfied: -6.11 < R2 / R8 < -3.

46.

7. The imaging lens assembly according to claim 1, wherein: The radius of curvature R2 of the image-side surface of the first lens and the radius of curvature R10 of the image-side surface of the fifth lens, and the following conditions are satisfied: 3.09 < R2 / R10 < 5.

81.

8. The imaging lens assembly according to claim 1, wherein: The radius of curvature R3 of the object-side surface of the second lens and the radius of curvature R4 of the image-side surface of the second lens, and the following conditions are satisfied: 2.32 < R3 / R4 < 4.

46.

9. The imaging lens assembly according to claim 1, wherein: The object-side surface of the second lens has a curvature radius R3, the image-side surface of the fourth lens has a curvature radius R8, and the distance between the third lens and the fourth lens on the optical axis is T34, and the following condition is satisfied: -41.59<(R3 / R8) / T34<-11.

45.

10. The imaging lens assembly according to claim 1, wherein: The object-side surface of the fifth lens has a curvature radius R9, the focal length of the fifth lens is f5, and the following condition is satisfied: 1.74<R9 / f5<3.

58.

11. The imaging lens assembly according to claim 1, wherein: The focal length of the second lens is f2, the focal length of the fourth lens is f4, and the following conditions are met: -5.56 <f2 / f4<-2.66。 12. The imaging lens assembly according to claim 1, wherein: The focal length of the second lens is f2, the focal length of the fifth lens is f5, and the following conditions are met: 3.59 <f2 / f5<7。 13. The imaging lens assembly according to claim 1, wherein: The distance between the object-side surface of the first lens and the imaging plane on the optical axis is TL, and the distance between the third lens and the fourth lens on the optical axis is T34, and the following condition is satisfied: 7.12<TL / T34<13.

93.

14. The imaging lens assembly according to claim 1, wherein: The distance between the image side surface of the fifth lens and the imaging plane on the optical axis is BFL, the thickness of the fifth lens on the optical axis is CT5, and the following conditions are met: 1.93 <BFL / CT5<3.34。 15. The imaging lens assembly according to claim 1, wherein: The distance between the object side surface of the first lens and the imaging surface on the optical axis is TL, the distance between the fourth lens and the fifth lens on the optical axis is T45, and the following conditions are met: 8.88 <TL / T45<20。 16. A camera module, characterized in that: Include: a lens barrel; An imaging lens assembly as claimed in any one of claims 1 to 15, arranged in the lens barrel; and An image sensor is disposed on the imaging surface of the imaging lens assembly.

Images