Imaging lens group and camera module

Abstract

The present invention relates to an imaging lens group, which sequentially includes, from the object side to the image side: an aperture; a first lens; a second lens; a third lens; and an infrared band-pass filter. Among them, half of the maximum viewing angle in the imaging lens group is HFOV, the radius of curvature R6 of the image-side surface of the third lens, and the overall focal length of the imaging lens group is f, and the following conditions are satisfied: -6.83 < HFOV / (R6 / f) < 44.10. Accordingly, it helps to make the lens group thinner and have a larger viewing angle.

Description

Technical Field

[0001] This invention relates to lens groups, and in particular to an imaging lens group and camera module used in electronic products. Background Technology

[0002] In recent years, 3D sensing technology has flourished, especially in mobile phone applications, which are a future trend. Time-of-Flight (TOF) camera modules are lens groups used in 3D sensing technology. TOF is a technology that calculates the distance between an object and a source by calculating the bounce time of light, infrared light, and laser light.

[0003] In addition to its application in infrared reception and sensing in game consoles, infrared optical lens assemblies have also been used in mobile phones in recent years. To improve sensing performance, most infrared wavelength optical lens assemblies are now paired with high-resolution photosensitive components. However, optical lens assemblies used in game consoles typically have longer camera modules and lower imaging resolution, making them unsuitable for portable products such as mobile phones.

[0004] In view of this, how to improve imaging resolution and shorten the length of the camera module, thereby enhancing the feasibility of applying 3D sensing technology to mobile phones, has become a pressing technical bottleneck that the infrared wavelength receiving lens group needs to overcome. Summary of the Invention

[0005] The purpose of this invention is to provide an imaging lens assembly and a camera module. The imaging lens assembly includes three lenses with refractive power. Under certain conditions, the imaging lens assembly provided by this invention can simultaneously meet the requirements of miniaturization and improved image quality.

[0006] The present invention provides an imaging lens assembly comprising, from the object side to the image side, the following components in sequence: 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 convex near the optical axis, and both the object-side and image-side surfaces of the first lens are aspherical; a second lens having refractive power, wherein the object-side surface of the second lens is concave near the optical axis, and the image-side surface of the second lens is convex near the optical axis, and both the object-side and image-side surfaces of the second lens are aspherical; a third lens having positive refractive power, wherein the object-side surface of the third lens is convex near the optical axis, and both the object-side and image-side surfaces of the third lens are aspherical; and an infrared bandpass filter;

[0007] The maximum field of view (HFOV) of this imaging lens group is half of the maximum field of view. The radius of curvature of the image-side surface of the third lens is R6. The overall focal length of the imaging lens group is f, and it satisfies the following condition: -6.83 <HFOV / (R6 / f)<44.10。

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

[0009] The efficacy of the present invention is that when the above three lenses with refractive power are combined with -6.83 < HFOV / (R6 / f) < 44.10, it helps to make the lens group thinner and have a larger viewing angle. More preferably, the following conditions can also be satisfied: -6.27 < HFOV / (R6 / f) < 43.0.

[0010] Preferably, the radius of curvature R1 of the object 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: -8.68 < R1 / R3 < -3.67. Thereby, the spherical aberration and astigmatism of the imaging lens group are effectively reduced. More preferably, the following conditions can also be satisfied: -7.96 < R1 / R3 < -4.13.

[0011] Preferably, 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: 4.12 < R2 / R3 < 30.18. Thereby, the spherical aberration and astigmatism of the imaging lens group are effectively reduced. More preferably, the following conditions can also be satisfied: 4.64 < R2 / R3 < 27.66.

[0012] Preferably, the radius of curvature R2 of the image side surface of the first lens and the entrance pupil diameter EPD of the imaging lens group satisfy the following conditions: -10.42 < R2 / EPD < -2.00. Thereby, the imaging quality of the lens group is improved. More preferably, the following conditions can also be satisfied: -9.55 < R2 / EPD < -2.24.

[0013] [[ID=十六]]Preferably, the focal length of the second lens is f2 and the thickness of the second lens on the optical axis is CT2, and they satisfy the following conditions: -11.48 < f2 / CT2 < 30.11. Thereby, the relationship between the thickness and focal length of the second lens is effectively balanced to achieve thinning and improve imaging quality. More preferably, the following conditions can also be satisfied: -10.53 < f2 / CT2 < 33.87. [[ID=十七]] [[ID=十八]]

[0014] [[ID=十九]]Preferably, the thickness of the third lens on the optical axis is CT3 and the radius of curvature R5 of the object side surface of the third lens satisfy the following conditions: 0.26 < CT3 / R5 < 2.08. Thereby, the relationship between the surface shape of the object side surface of the third lens and the thickness of the third lens can be controlled, which helps to achieve an appropriate balance between miniaturization and assembly yield. More preferably, the following conditions can also be satisfied: 0.29 < CT3 / R5 < 1.91. [[ID=二十]] [[ID=二十一]]

[0015] Preferably, the distance on the optical axis from the object-side surface of the first lens to the image-side surface of the third lens is TD, and the distance on the optical axis between the second lens and the third lens is T23, and the following conditions are satisfied: 46.90 < TD / T23 < 103.89. Thereby, it helps to achieve an appropriate balance between miniaturization and lens spacing. More preferably, the following conditions can also be satisfied: 52.76 < TD / T23 < 95.23.

[0016] Preferably, the maximum viewing angle of the imaging lens group is FOV, and the overall focal length of the imaging lens group is f, and the following conditions are satisfied: 30.09 < FOV / f < 49.43. Thereby, it can effectively collect light at large angles and expand the image reception range.More preferably, the following conditions can also be satisfied: 33.86 < FOV / f < 45.31.

[0017] [[ID=​​​​​​​​​​​Preferably, the radius of curvature R6 of the image-side surface of the third lens, the focal length of the third lens is f3, and the following conditions are satisfied: -24.08 < R6 / f3 < 196.86. Thereby, it helps to correct higher-order aberrations and astigmatism. The following conditions can also be satisfied: -22.07 < R6 / f3 < 180.46.

[0022] Preferably, the focal length of the third lens is f3, the thickness of the third lens on the optical axis is CT3, and the following conditions are satisfied: 0.00 < f3 / CT3 < 19.85. Thereby, the relationship between the thickness and the focal length of the third lens is effectively balanced to achieve thinning and improve imaging quality. More preferably, the following conditions can also be satisfied: 0.97 < f3 / CT3 < 18.19.

[0023] Preferably, the thickness of the third lens on the optical axis is CT^3, the thickness of the second lens on the optical axis is CT^2, and the following conditions are satisfied: 0.86 < CT3 / CT2 < 6.25. Thereby, the thicknesses of the second lens and the third lens can be balanced, which helps to achieve an appropriate balance between miniaturization and lens formability. More preferably, the following conditions can also be satisfied: 0.97 < CT3 / CT2 < 5.73.

[0024] Preferably, the maximum viewing angle in the imaging lens group is FOV, the distance from the object-side surface of the first lens to the imaging surface on the optical axis is TL, and the following conditions are satisfied: 16.46 < FOV / TL < 28.47. Thereby, it can effectively collect light at large angles, expand the image reception range and meet the requirements of thinning. More preferably, the following conditions can also be satisfied: 18.52 < FOV / TL < 26.1.

[0025] Preferably, half of the maximum viewing angle in the imaging lens group is HFOV, the radius of curvature R1 of the object-side surface of the first lens, and the following conditions are satisfied: 16.11 < HFOV / R1 < 40.24. Thereby, it can effectively collect light at large angles and expand the image reception range. More preferably, the following conditions can also be satisfied: 18.12 < HFOV / R1 < 36.88.

[0026] Preferably, the focal length of the second lens is f2, the distance from the object-side surface of the first lens to the imaging surface on the optical axis is TL, and half of the maximum viewing angle in the imaging lens group is HFOV, and the following conditions are satisfied: -12.36 < f2*TL / cos(HFOV) < 78.43. Thereby, it helps to thin the lens group and expand the image reception range. More preferably, the following conditions can also be satisfied: -11.33 < f2*TL / cos(HFOV) < 71.89.

[0027] Another imaging module provided by the present invention includes a lens barrel; each of the aforementioned imaging lens groups is disposed in the lens barrel; and an image sensor is disposed on the imaging surface of the imaging lens group.

[0028] For each of the above imaging lens groups or each imaging module, the radius of curvature R1 of the object side surface of the first lens and the radius of curvature R5 of the object side surface of the third lens satisfy the following condition: 1.55 < R1 / R5 < 4.75. Thereby, the spherical aberration and astigmatism of the imaging lens group are effectively reduced.

[0029] For each of the above imaging lens groups or each imaging module, the focal length of the third lens is f3, and the entrance pupil diameter of the imaging lens group is EPD, and they satisfy the following condition: 0.00 < f3 / EPD < 6.31. Thereby, it helps to improve the imaging quality of the imaging lens group.

[0030] For each of the above imaging lens groups or each imaging module, the focal length of the first lens is f1, and the focal length of the third lens is f3, and they satisfy the following condition: 0.34 < f1 / f3 < 3.1. Thereby, it is beneficial to reduce the generation of system sensitivity and aberration.

[0031] For each of the above imaging lens groups or each imaging module, the distance between the first lens and the second lens on the optical axis is T12, and the thickness of the second lens on the optical axis is CT2, and they satisfy the following condition: 0.93 < T12 / CT2 < 2.67. Thereby, the lens thickness and lens spacing can be adjusted to reduce the influence of manufacturing tolerances on the imaging quality.

[0032] For each of the above imaging lens groups or each imaging module, the thickness of the first lens on the optical axis is CT1, and the thickness of the second lens on the optical axis is CT2, and they satisfy the following condition: 1.0 < CT1 / CT2 < 3.13. Thereby, the thicknesses of the first lens and the second lens can be balanced to achieve better formability.

[0033] For each of the above imaging lens groups or each imaging module, the distance between the second lens and the third lens on the optical axis is T23, and the thickness of the third lens on the optical axis is CT3, and they satisfy the following condition: 0.00 < T23 / CT3 < 0.09. Thereby, the lens thickness and lens spacing can be adjusted to reduce the influence of manufacturing tolerances on the imaging quality.

[0034] For each of the above imaging lens groups or each imaging module, the focal length of the first lens is f1, and the focal length of the second lens is f2, and they satisfy the following condition: -2.36 < f1 / f2 < 0.62. Thereby, it is beneficial to reduce the generation of system sensitivity and aberration. Description of the Drawings

[0035] Figure 1AThis is a schematic diagram of the imaging lens group according to the first embodiment of the present invention.

[0036] Figure 1B From left to right, the images are curves showing the image plane curvature and distortion of the imaging lens group in the first embodiment.

[0037] Figure 2A This is a schematic diagram of the imaging lens group according to the second embodiment of the present invention.

[0038] Figure 2B From left to right, the images are curves showing the image plane curvature and distortion of the imaging lens group in the second embodiment.

[0039] Figure 3A This is a schematic diagram of the imaging lens group according to the third embodiment of the present invention.

[0040] Figure 3B From left to right, the images are curves showing the image plane curvature and distortion of the imaging lens group in the third embodiment.

[0041] Figure 4A This is a schematic diagram of the imaging lens group according to the fourth embodiment of the present invention.

[0042] Figure 4B From left to right, the images are curves showing the image plane curvature and distortion of the imaging lens group in the fourth embodiment.

[0043] Figure 5A This is a schematic diagram of the imaging lens group according to the fifth embodiment of the present invention.

[0044] Figure 5B From left to right, the images are curves showing the image plane curvature and distortion difference of the imaging lens group in the fifth embodiment.

[0045] Figure 6A This is a schematic diagram of the imaging lens group according to the sixth embodiment of the present invention.

[0046] Figure 6B From left to right, the images are curves showing the image plane curvature and distortion of the imaging lens group in the sixth embodiment.

[0047] Figure 7A This is a schematic diagram of the imaging lens group according to the seventh embodiment of the present invention.

[0048] Figure 7B From left to right, the images are curves showing the image plane curvature and distortion difference of the imaging lens group in the seventh embodiment.

[0049] Figure 8A This is a schematic diagram of the imaging lens group according to the eighth embodiment of the present invention.

[0050] Figure 8B From left to right, the images are curves showing the image plane curvature and distortion difference of the imaging lens group in the eighth embodiment.

[0051] Figure 9A This is a schematic diagram of the imaging lens group according to the ninth embodiment of the present invention.

[0052] Figure 9B From left to right, the images are curves showing the image plane curvature and distortion of the imaging lens group in the ninth embodiment.

[0053] Figure 10 This is a schematic diagram of the camera module according to the tenth embodiment of the present invention.

[0054] Explanation of reference numerals in the attached figures:

[0055] 100, 200, 300, 400, 500, 600, 700, 800, 900: Aperture

[0056] 110, 210, 310, 410, 510, 610, 710, 810, 910: First lens

[0057] 111, 211, 311, 411, 511, 611, 711, 811, 911: Object-side surface

[0058] 112, 212, 312, 412, 512, 612, 712, 812, 912: Image side surface

[0059] 120, 220, 320, 420, 520, 620, 720, 820, 920: Second lens

[0060] 121, 221, 321, 421, 521, 621, 721, 821, 921: Object-side surface

[0061] 122, 222, 322, 422, 522, 622, 722, 822, 922: Image side surface

[0062] 130, 230, 330, 430, 530, 630, 730, 830, 930: Third lens

[0063] 131, 231, 331, 431, 531, 631, 731, 831, 931: Object-side surface

[0064] 132, 232, 332, 432, 532, 632, 732, 832, 932: Image side surface

[0065] 160, 260, 360, 460, 560, 660, 760, 860, 960: Infrared bandpass filters

[0066] 170, 270, 370, 470, 570, 670, 770, 870, 970: Imaging plane

[0067] 180, 280, 380, 480, 580, 680, 780, 880, 980: Image Sensor

[0068] 190, 290, 390, 490, 590, 690, 790, 890, 990: Optical axis

[0069] 10: Camera Module

[0070] 11: Lens tube

[0071] 12: Imaging lens group

[0072] f: Overall focal length of the imaging lens group

[0073] Fno: Aperture value

[0074] FOV: Maximum field of view of the imaging lens group

[0075] EPD: Entrance pupil diameter of the imaging lens group

[0076] HFOV: Half of the maximum field of view in the imaging lens group.

[0077] TL: The distance along the optical axis from the object-side surface of the first lens to the imaging plane.

[0078] R1: Radius of curvature of the object-side surface of the first lens

[0079] R2: Radius of curvature of the image-side surface of the first lens

[0080] R3: Radius of curvature of the object-side surface of the second lens

[0081] R5: Radius of curvature of the object-side surface of the third lens

[0082] R6: Radius of curvature of the image-side surface of the third lens

[0083] f1: Focal length of the first lens

[0084] f2: Focal length of the second lens

[0085] f3: Focal length of the third lens

[0086] CT1: Thickness of the first lens along the optical axis

[0087] CT2: Thickness of the second lens on the optical axis

[0088] CT3: Thickness of the third lens on the optical axis

[0089] TD: The distance on the optical axis from the object-side surface of the first lens to the image-side surface of the third lens.

[0090] T12: The distance between the first lens and the second lens on the optical axis

[0091] T23: The distance between the second and third lenses on the optical axis. Detailed Implementation

[0092] <First Embodiment>

[0093] Please refer to Figure 1A and Figure 1B ,in Figure 1A A schematic diagram of an imaging lens assembly according to a first embodiment of the present invention is shown. Figure 1B From left to right, the images show the image plane curvature and distortion aberration curves of the imaging lens group in the first embodiment. Figure 1A As can be seen, the imaging lens group, along the optical axis 190 from the object side to the image side, sequentially includes an aperture 100, a first lens 110, a second lens 120, a third lens 130, an infrared bandpass filter 160, and an imaging plane 170, and this imaging lens group is used in conjunction with an image sensor 180. The imaging lens group contains three refractive lenses, but this is not a limitation. The aperture 100 is positioned between the object and the first lens 110. The image sensor 180 is positioned on the imaging plane 170.

[0094] 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 convex near the optical axis 190. Both the object-side surface 111 and the image-side surface 112 are aspherical.

[0095] The second lens 120 has negative refractive power and is made of plastic. Its object-side surface 121 is concave near the optical axis 190, and its image-side surface 122 is convex near the optical axis 190. Both the object-side surface 121 and the image-side surface 122 are aspherical.

[0096] The third lens 130 has positive refractive power and is made of plastic. Its object-side surface 131 is convex near the optical axis 190, and its image-side surface 132 is convex near the optical axis 190. Both the object-side surface 131 and the image-side surface 132 are aspherical.

[0097] The infrared bandpass filter 160 is made of glass and is disposed between the third lens 130 and the imaging surface 170 without affecting the focal length of the imaging lens group. In this embodiment, a filter with a transmittance wavelength of 940nm±30nm is selected, but it is not limited to this.

[0098] The equations for the aspherical surfaces of the above lenses are expressed as follows:

[0099]

[0100] Where z is the position value along the optical axis 190 at a height of h with the surface vertex as a reference; c is the curvature of the lens surface near the optical axis 190, and is the reciprocal of the radius of curvature (R) (c = 1 / R), R is the radius of curvature of the lens surface near the optical axis 190, h is the vertical distance of the lens surface from the optical axis 190, k is the conic constant, and Ai is the i-th order aspherical constant.

[0101] In the imaging lens group of the first embodiment, the overall focal length of the imaging lens group is f, the aperture value (f-number) of the imaging lens group is Fno, the maximum angle of view of the imaging lens group is FOV, and the entrance pupil diameter of the imaging lens group is EPD, with the following values: f = 2.07 (mm); Fno = 1.36; FOV = 77.94 (degrees); and EPD = 1.53 (mm). It also satisfies the following condition: FOV / f = 37.62 (degrees / mm).

[0102] In the imaging lens group of the first embodiment, half of the maximum field of view in the imaging lens group is HFOV, the radius of curvature R6 of the image-side surface 132 of the third lens 130, the overall focal length of the imaging lens group is f, and the following condition is satisfied: HFOV / (R6 / f)=-5.51 (degrees).

[0103] In the imaging lens group of the first embodiment, the radius of curvature R1 of the object-side surface 111 of the first lens 110 and the radius of curvature R3 of the object-side surface 121 of the second lens 120 satisfy the following condition: R1 / R3 = -6.76.

[0104] In the imaging lens group of the first embodiment, the radius of curvature R2 of the image-side surface 112 of the first lens 110 and the radius of curvature R3 of the object-side surface 121 of the second lens 120 satisfy the following condition: R2 / R3 = 14.88.

[0105] In the imaging lens group of the first embodiment, the radius of curvature R2 of the image-side surface 112 of the first lens 110, the entrance pupil diameter of the imaging lens group is EPD, and the following condition is satisfied: R2 / EPD=-4.35.

[0106] In the imaging lens group of the first embodiment, the focal length of the second lens 120 is f2, the thickness of the second lens 120 on the optical axis 190 is CT2, and the following condition is satisfied: f2 / CT2=-8.35.

[0107] In the imaging lens group of the first embodiment, the thickness of the third lens 130 on the optical axis 190 is CT3, the radius of curvature of the object-side surface 131 of the third lens 130 is R5, and the following condition is satisfied: CT3 / R5=1.21.

[0108] In the imaging lens group of the first embodiment, the distance on the optical axis 190 from the object-side surface 111 of the first lens 110 to the image-side surface 132 of the third lens 130 is TD, and the distance on the optical axis 190 between the second lens 120 and the third lens 130 is T23, and the following condition is satisfied: TD / T23=84.58.

[0109] In the imaging lens group of the first embodiment, half of the maximum field of view in the imaging lens group is HFOV, and the radius of curvature R3 of the object-side surface 121 of the second lens 120 satisfies the following condition: HFOV / R3=-87.17 (degrees / mm).

[0110] In the imaging lens group of the first embodiment, the overall focal length of the imaging lens group is f, the distance from the object-side surface 111 of the first lens 110 to the imaging surface 170 on the optical axis 190 is TL, and the thickness of the third lens 130 on the optical axis 190 is CT3, and the following condition is satisfied: f*TL / CT3=6.75 (mm).

[0111] In the imaging lens group of the first embodiment, the radius of curvature R2 of the image-side surface 112 of the first lens 110 and the radius of curvature R5 of the object-side surface 131 of the third lens 130 satisfy the following condition: R2 / R5 = -6.94.

[0112] In the imaging lens group of the first embodiment, the radius of curvature R2 of the image-side surface 112 of the first lens 110 and the radius of curvature R6 of the image-side surface 132 of the third lens 130 satisfy the following condition: R2 / R6 = 0.45.

[0113] In the imaging lens group of the first embodiment, the radius of curvature R6 of the image-side surface 132 of the third lens 130, the focal length of the third lens 130 is f3, and the following condition is satisfied: R6 / f3=-9.76.

[0114] In the imaging lens group of the first embodiment, the focal length of the third lens 130 is f3, the thickness of the third lens 130 on the optical axis 190 is CT3, and the following condition is satisfied: f3 / CT3=1.30.

[0115] In the imaging lens group of the first embodiment, the thickness of the third lens 130 on the optical axis 190 is CT3, the thickness of the second lens 120 on the optical axis 190 is CT2, and the following condition is satisfied: CT3 / CT2 = 4.71.

[0116] In the imaging lens group of the first embodiment, the maximum viewing angle is FOV, the distance from the object-side surface 111 of the first lens 110 to the imaging surface 170 on the optical axis 190 is TL, and the following condition is satisfied: FOV / TL = 20.68.

[0117] In the imaging lens group of the first embodiment, half of the maximum field of view in the imaging lens group is HFOV, and the radius of curvature R1 of the object-side surface 111 of the first lens 110 satisfies the following condition: HFOV / R1 = 25.78 (degrees / mm).

[0118] In the imaging lens group of the first embodiment, the focal length of the second lens 120 is f2, the distance from the object-side surface 111 of the first lens 110 to the imaging surface 170 on the optical axis 190 is TL, half of the maximum field of view in the imaging lens group is HFOV, and the following condition is satisfied: f2*TL / cos(HFOV)=-9.95(mm2).

[0119] In the imaging lens group of the first embodiment, the radius of curvature R1 of the object-side surface 111 of the first lens 110 and the radius of curvature R5 of the object-side surface 131 of the third lens 130 satisfy the following condition: R1 / R5 = 3.15.

[0120] In the imaging lens group of the first embodiment, the focal length of the third lens 130 is f3, the entrance pupil diameter of the imaging lens group is EPD, and the following condition is satisfied: f3 / EPD=0.98.

[0121] In the imaging lens group of the first embodiment, the focal length of the first lens 110 is f1, the focal length of the third lens 130 is f3, and the following condition is satisfied: f1 / f3 = 2.29.

[0122] In the imaging lens group of the first embodiment, the distance between the first lens 110 and the second lens 120 on the optical axis 190 is T12, the thickness of the second lens 120 on the optical axis 190 is CT2, and the following condition is satisfied: T12 / CT2=2.14.

[0123] In the imaging lens group of the first embodiment, the thickness of the first lens 110 on the optical axis 190 is CT1, the thickness of the second lens 120 on the optical axis 190 is CT2, and the following condition is satisfied: CT1 / CT2 = 2.28.

[0124] In the imaging lens group of the first embodiment, the distance between the second lens 120 and the third lens 130 on the optical axis 190 is T23, the thickness of the third lens 130 on the optical axis 190 is CT3, and the following condition is satisfied: T23 / CT3=0.03.

[0125] In the imaging lens group of the first embodiment, the focal length of the first lens 110 is f1, the focal length of the second lens 120 is f2, and the following condition is satisfied: f1 / f2 = -1.68.

[0126] Please refer to Table 1 and Table 2 below.

[0127]

[0128]

[0129] Table 1 shows... Figure 1A The first embodiment provides detailed structural data, where the units for radius of curvature, thickness, gap, and focal length are mm. Surfaces 0-10 sequentially represent surfaces from the object side to the image side. Surface 0 represents the gap between the object and aperture 100 on the optical axis 190; surface 1 represents the gap between aperture 100 and the object-side surface 111 of the first lens 110 on the optical axis 190, and aperture 100 is further away from the object side than the object-side surface 111 of the first lens 110, hence it is represented by a negative value; surfaces 2, 4, 6, and 8 are respectively the first lens... 110, the thickness of the second lens 120, the third lens 130, and the infrared bandpass filter 160 on the optical axis 190; surfaces 3, 5, 7, and 9 are respectively the gaps on the optical axis 190 between the first lens 110 and the second lens 120, the gaps on the optical axis 190 between the second lens 120 and the third lens 130, the gaps on the optical axis 190 between the third lens 130 and the infrared bandpass filter 160, and the gaps on the optical axis 190 between the infrared bandpass filter 160 and the imaging plane 170.

[0130] Table 2 shows the aspherical data in the first embodiment, where k represents the conic coefficient in the aspherical curve equation, and A2, A4, A6, A8, A10, A12, A14, and A16 are higher-order aspherical coefficients. Furthermore, the tables in the following embodiments are schematic diagrams and image plane curvature curves corresponding to each embodiment. The definitions of the data in the tables are the same as those in Tables 1 and 2 of the first embodiment, and will not be repeated here.

[0131] <Second Embodiment>

[0132] Please refer to Figure 2A and Figure 2B ,in Figure 2A A schematic diagram of an imaging lens assembly according to a second embodiment of the present invention is shown. Figure 2B From left to right, the images show the image plane curvature and distortion aberration curves of the imaging lens group in the second embodiment. Figure 2AAs can be seen, the imaging lens group, along the optical axis 290 from the object side to the image side, sequentially includes an aperture 200, a first lens 210, a second lens 220, a third lens 230, an infrared bandpass filter 260, and an imaging plane 270, and this imaging lens group is used in conjunction with an image sensor 280. The imaging lens group contains three refractive lenses, but this is not a limitation. The aperture 200 is positioned between the subject and the first lens 210. The image sensor 280 is positioned on the imaging plane 270.

[0133] 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 convex near the optical axis 290. Both the object-side surface 211 and the image-side surface 212 are aspherical.

[0134] The second lens 220 has negative refractive power and is made of plastic. Its object-side surface 221 is concave near the optical axis 290, and its image-side surface 222 is convex near the optical axis 290. Both the object-side surface 221 and the image-side surface 222 are aspherical.

[0135] The third lens 230 has positive refractive power and is made of plastic. Its object-side surface 231 is convex near the optical axis 290, and its image-side surface 232 is concave near the optical axis 290. Both the object-side surface 231 and the image-side surface 232 are aspherical.

[0136] The infrared bandpass filter 260 is made of glass and is disposed between the third lens 230 and the imaging surface 270 without affecting the focal length of the imaging lens group. In this embodiment, a filter with a transmittance wavelength of 940nm±30nm is selected, but it is not limited to this.

[0137] Please refer to Table 3 and Table 4 below.

[0138]

[0139]

[0140]

[0141] In the second embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions of the parameters in the table below are the same as in the first embodiment, and will not be repeated here.

[0142] By referring to Tables 3 and 4, the following data can be calculated:

[0143]

[0144]

[0145] <Third Embodiment>

[0146] Please refer to Figure 3A and Figure 3B ,in Figure 3A A schematic diagram of an imaging lens assembly according to a third embodiment of the present invention is shown. Figure 3B From left to right, the images show the image plane curvature and distortion aberration curves of the imaging lens group in the third embodiment. Figure 3A As can be seen, the imaging lens group, along the optical axis 390 from the object side to the image side, sequentially includes an aperture 300, a first lens 310, a second lens 320, a third lens 330, an infrared bandpass filter 360, and an imaging surface 370, and this imaging lens group is used in conjunction with an image sensor 380. The imaging lens group contains three refractive lenses, but this is not a limitation. The aperture 300 is positioned between the object and the first lens 310. The image sensor 380 is positioned on the imaging surface 370.

[0147] 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 convex near the optical axis 390. Both the object-side surface 311 and the image-side surface 312 are aspherical.

[0148] The second lens 320 has negative refractive power and is made of plastic. Its object-side surface 321 is concave near the optical axis 390, and its image-side surface 322 is convex near the optical axis 390. Both the object-side surface 321 and the image-side surface 322 are aspherical.

[0149] The third lens 330 has positive refractive power and is made of plastic. Its object-side surface 331 is convex 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.

[0150] The infrared bandpass filter 360 is made of glass and is disposed between the third lens 330 and the imaging surface 370 without affecting the focal length of the imaging lens group. In this embodiment, a filter with a transmittance wavelength of 940nm±30nm is selected, but it is not limited to this.

[0151] Please refer to Table 5 and Table 6 below.

[0152]

[0153]

[0154]

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

[0156] By referring to Tables 5 and 6, the following data can be calculated:

[0157]

[0158]

[0159] <Fourth Embodiment>

[0160] Please refer to Figure 4A and Figure 4B ,in Figure 4A A schematic diagram of an imaging lens assembly according to a fourth embodiment of the present invention is shown. Figure 4B From left to right, the images show the image plane curvature and distortion aberration curves of the imaging lens group in the fourth embodiment. Figure 4A As can be seen, the imaging lens group, along the optical axis 490 from the object side to the image side, sequentially includes an aperture 400, a first lens 410, a second lens 420, a third lens 430, an infrared bandpass filter 460, and an imaging surface 470, and this imaging lens group is used in conjunction with an image sensor 480. The imaging lens group contains three refractive lenses, but this is not a limitation. The aperture 400 is positioned between the object and the first lens 410. The image sensor 480 is positioned on the imaging surface 470.

[0161] 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 convex near the optical axis 490. Both the object-side surface 411 and the image-side surface 412 are aspherical.

[0162] The second lens 420 has negative refractive power and is made of plastic. Its object-side surface 421 is concave near the optical axis 490, and its image-side surface 422 is convex near the optical axis 490. Both the object-side surface 421 and the image-side surface 422 are aspherical.

[0163] 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 concave near the optical axis 490. Both the object-side surface 431 and the image-side surface 432 are aspherical.

[0164] The infrared bandpass filter 460 is made of glass and is disposed between the third lens 430 and the imaging surface 470 without affecting the focal length of the imaging lens group. In this embodiment, a filter with a transmittance of light wavelength of 940nm±30nm is selected, but it is not limited to this.

[0165] Please refer to Table 7 and Table 8 below.

[0166]

[0167]

[0168]

[0169] In the fourth embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions of the parameters in the table below are the same as in the first embodiment, and will not be repeated here.

[0170] By referring to Tables 7 and 8, the following data can be calculated:

[0171]

[0172]

[0173] <Fifth Embodiment>

[0174] Please refer to Figure 5A and Figure 5B ,in Figure 5A A schematic diagram of an imaging lens assembly according to a fifth embodiment of the present invention is shown. Figure 5B From left to right, the images show the image plane curvature and distortion aberration curves of the imaging lens group in the fifth embodiment. Figure 5A As can be seen, the imaging lens group, along the optical axis 590 from the object side to the image side, sequentially includes an aperture 500, a first lens 510, a second lens 520, a third lens 530, an infrared bandpass filter 560, and an imaging surface 570, and this imaging lens group is used in conjunction with an image sensor 580. The imaging lens group contains three refractive lenses, but this is not a limitation. The aperture 500 is positioned between the object and the first lens 510. The image sensor 580 is positioned on the imaging surface 570.

[0175] 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 convex near the optical axis 590. Both the object-side surface 511 and the image-side surface 512 are aspherical.

[0176] The second lens 520 has negative refractive power and is made of plastic. Its object-side surface 521 is concave near the optical axis 590, and its image-side surface 522 is convex near the optical axis 590. Both the object-side surface 521 and the image-side surface 522 are aspherical.

[0177] 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 concave near the optical axis 590. Both the object-side surface 531 and the image-side surface 532 are aspherical.

[0178] The infrared bandpass filter 560 is made of glass and is disposed between the third lens 530 and the imaging surface 570 without affecting the focal length of the imaging lens group. In this embodiment, a filter with a transmittance wavelength of 940nm±30nm is selected, but it is not limited to this.

[0179] Please refer to Table 9 and Table 10 below.

[0180]

[0181]

[0182]

[0183] In the fifth embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions of the parameters in the table below are the same as in the first embodiment, and will not be repeated here.

[0184] By referring to Tables 9 and 10, the following data can be calculated:

[0185]

[0186]

[0187] <Sixth Embodiment>

[0188] Please refer to Figure 6A and Figure 6B ,in Figure 6A A schematic diagram of an imaging lens assembly according to a sixth embodiment of the present invention is shown. Figure 6B From left to right, the images show the image plane curvature and distortion aberration curves of the imaging lens group in the sixth embodiment. Figure 6A As can be seen, the imaging lens group, along the optical axis 690 from the object side to the image side, sequentially includes an aperture 600, a first lens 610, a second lens 620, a third lens 630, an infrared bandpass filter 660, and an imaging surface 670, and this imaging lens group is used in conjunction with an image sensor 680. The imaging lens group contains three refractive lenses, 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.

[0189] 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 convex near the optical axis 690. Both the object-side surface 611 and the image-side surface 612 are aspherical.

[0190] The second lens 620 has negative refractive power and is made of plastic. Its object-side surface 621 is concave near the optical axis 690, and its image-side surface 622 is convex near the optical axis 690. Both the object-side surface 621 and the image-side surface 622 are aspherical.

[0191] 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.

[0192] The infrared bandpass filter 660 is made of glass and is disposed between the third lens 630 and the imaging surface 670 without affecting the focal length of the imaging lens group. In this embodiment, a filter with a transmittance of light wavelength of 940nm±30nm is selected, but it is not limited to this.

[0193] Please refer to Table 11 and Table 12 below.

[0194]

[0195]

[0196]

[0197] In the sixth embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions of the parameters in the table below are the same as in the first embodiment, and will not be repeated here.

[0198] By referring to Tables 11 and 12, the following data can be calculated:

[0199]

[0200]

[0201] <Seventh Embodiment>

[0202] Please refer to Figure 7A and Figure 7B ,in Figure 7A A schematic diagram of an imaging lens assembly according to a seventh embodiment of the present invention is shown. Figure 7B From left to right, the images show the image plane curvature and distortion aberration curves of the imaging lens group in the seventh embodiment. Figure 7AAs can be seen, the imaging lens group, along the optical axis 790 from the object side to the image side, sequentially includes an aperture 700, a first lens 710, a second lens 720, a third lens 730, an infrared bandpass filter 760, and an imaging surface 770, and this imaging lens group is used in conjunction with an image sensor 780. The imaging lens group contains three refractive lenses, but this is not a limitation. The aperture 700 is positioned between the object and the first lens 710. The image sensor 780 is positioned on the imaging surface 770.

[0203] 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 convex near the optical axis 790. Both the object-side surface 711 and the image-side surface 712 are aspherical.

[0204] The second lens 720 has positive refractive power and is made of plastic. Its object-side surface 721 is concave near the optical axis 790, and its image-side surface 722 is convex near the optical axis 790. Both the object-side surface 721 and the image-side surface 722 are aspherical.

[0205] 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 concave near the optical axis 790. Both the object-side surface 731 and the image-side surface 732 are aspherical.

[0206] The infrared bandpass filter 760 is made of glass and is disposed between the third lens 730 and the imaging surface 770 without affecting the focal length of the imaging lens group. In this embodiment, a filter with a transmittance of light wavelength of 940nm±30nm is selected, but it is not limited to this.

[0207] Please refer to Table 13 and Table 14 below.

[0208]

[0209]

[0210]

[0211] In the seventh embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions of the parameters in the table below are the same as in the first embodiment, and will not be repeated here.

[0212] By referring to Tables 13 and 14, the following data can be calculated:

[0213]

[0214]

[0215] <Eighth Embodiment>

[0216] Please refer to Figure 8A and Figure 8B ,in Figure 8A A schematic diagram of an imaging lens assembly according to an eighth embodiment of the present invention is shown. Figure 8B From left to right, the images show the image plane curvature and distortion aberration curves of the imaging lens group in the eighth embodiment. Figure 8A As can be seen, the imaging lens group, along the optical axis 890 from the object side to the image side, sequentially includes an aperture 800, a first lens 810, a second lens 820, a third lens 830, an infrared bandpass filter 860, and an imaging surface 870, and this imaging lens group is used in conjunction with an image sensor 880. The imaging lens group contains three refractive lenses, but this is not a limitation. The aperture 800 is positioned between the object and the first lens 810. The image sensor 880 is positioned on the imaging surface 870.

[0217] 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 convex near the optical axis 890. Both the object-side surface 811 and the image-side surface 812 are aspherical.

[0218] The second lens 820 has positive refractive power and is made of plastic. Its object-side surface 821 is concave near the optical axis 890, and its image-side surface 822 is convex near the optical axis 890. Both the object-side surface 821 and the image-side surface 822 are aspherical.

[0219] 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 concave near the optical axis 890. Both the object-side surface 831 and the image-side surface 832 are aspherical.

[0220] The infrared bandpass filter 860 is made of glass and is disposed between the third lens 830 and the imaging surface 870 without affecting the focal length of the imaging lens group. In this embodiment, a filter with a transmittance of light wavelength of 940nm±30nm is selected, but it is not limited to this.

[0221] Please also refer to Table 15 and Table 16 below.

[0222]

[0223]

[0224]

[0225] In the eighth embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions of the parameters in the table below are the same as in the first embodiment, and will not be repeated here.

[0226] By referring to Tables 15 and 16, the following data can be calculated:

[0227]

[0228] <Ninth Embodiment>

[0229] Please refer to Figure 9A and Figure 9B ,in Figure 9A A schematic diagram of an imaging lens assembly according to a ninth embodiment of the present invention is shown. Figure 9B From left to right, the images show the image plane curvature and distortion aberration curves of the imaging lens group in the ninth embodiment. Figure 9A As can be seen, the imaging lens group, along the optical axis 990 from the object side to the image side, sequentially includes an aperture 900, a first lens 910, a second lens 920, a third lens 930, an infrared bandpass filter 960, and an imaging surface 970, and this imaging lens group is used in conjunction with an image sensor 980. The imaging lens group contains three refractive lenses, 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.

[0230] 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 convex near the optical axis 990. Both the object-side surface 911 and the image-side surface 912 are aspherical.

[0231] The second lens 920 has positive refractive power and is made of plastic. Its object-side surface 921 is concave near the optical axis 990, and its image-side surface 922 is convex near the optical axis 990. Both the object-side surface 921 and the image-side surface 922 are aspherical.

[0232] 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 concave near the optical axis 990. Both the object-side surface 931 and the image-side surface 932 are aspherical.

[0233] The infrared bandpass filter 960 is made of glass and is disposed between the third lens 930 and the imaging surface 970 without affecting the focal length of the imaging lens group. In this embodiment, a filter with a transmittance wavelength of 940nm±30nm is selected, but it is not limited to this.

[0234] Please refer to Table 17 and Table 18 below.

[0235]

[0236]

[0237]

[0238] In the ninth embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions of the parameters in the table below are the same as in the first embodiment, and will not be repeated here.

[0239] By referring to Tables 17 and 18, the following data can be calculated:

[0240]

[0241] <Tenth Embodiment>

[0242] Please refer to Figure 10 This illustration depicts a camera module according to a tenth embodiment of the present invention. In this embodiment, the camera module is applied to a laptop computer, but is not limited thereto. The camera module 10 includes a lens barrel 11, an imaging lens group 12, and an image sensor 180. The imaging lens group 12 is the imaging lens group of the first embodiment described above, but is not limited thereto; it may also be the imaging lens group of other embodiments described above. Figure 10 The lenses in the drawn imaging lens group show the peripheral areas that do not capture light, and are slightly different from the lenses in the first embodiment. The imaging lens group 12 is housed in the lens barrel 11. The image sensor 180 is disposed on the imaging surface 170 of the imaging lens group and is an electronic photosensitive component (such as CMOS or CCD) with good brightness and low noise, so as to truly present the imaging quality of the imaging lens group.

[0243] The imaging lens assembly provided by this invention allows the lenses to be made of either plastic or glass. Using plastic effectively reduces production costs, while using glass increases the flexibility in configuring the refractive power of the imaging lens assembly. Furthermore, the object-side and image-side surfaces of the lenses in the imaging lens assembly can be aspherical, thus improving the adjustability of the lens surface shape to reduce aberrations and consequently reduce the number of lenses used. Therefore, the overall length of the imaging lens assembly of this invention can be effectively reduced.

[0244] In the imaging lens group provided by the present invention, taking a lens with refractive power as an example, if the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex near the optical axis; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave near the optical axis.

[0245] The imaging lens group provided by this invention can be applied to optical systems with mobile focusing as needed, and has the characteristics of excellent aberration correction and good imaging quality. It can be applied to various electronic imaging systems such as 3D (three-dimensional) image capture, digital cameras, mobile devices, digital drawing tablets or automotive photography.

[0246] In summary, the above embodiments and figures are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made in accordance with the claims of the present invention should fall within the scope 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 convex near the optical axis. Both the object-side surface and the image-side surface of the first lens are aspherical surfaces; A second lens with refractive power. The object-side surface of the second lens is concave near the optical axis, and the image-side surface of the second lens is convex near the optical axis. Both the object-side surface and the image-side surface of the second lens are aspherical surfaces; A third lens with positive refractive power. The object-side surface of the third lens is convex near the optical axis. Both the object-side surface and the image-side surface of the third lens are aspherical surfaces; and An infrared band-pass filter; Among them, the total number of lenses with refractive power in the imaging lens group is three. Half of the maximum viewing angle in the imaging lens group is HFOV, the radius of curvature of the image-side surface of the third lens is R6, the overall focal length of the imaging lens group is f, the distance on the optical axis from the object-side surface of the first lens to the image-side surface of the third lens is TD, and the distance on the optical axis between the second lens and the third lens is T23, and the following conditions are satisfied: -6.83 < HFOV / (R6 / f) < 44.10 and 46.90 < TD / T23 < 103.

89.

2. The imaging lens assembly as described in claim 1, characterized in that, The radius of curvature of the object-side surface of the first lens is R1, and the radius of curvature of the object-side surface of the second lens is R3, and the following conditions are satisfied: -8.68 < R1 / R3 < -3.

67.

3. The imaging lens assembly as described in claim 1, characterized in that, The radius of curvature of the image-side surface of the first lens is R2, and the radius of curvature of the object-side surface of the second lens is R3, and the following conditions are satisfied: 4.12 < R2 / R3 < 30.

18.

4. The imaging lens assembly as described in claim 1, characterized in that, The radius of curvature of the image-side surface of the first lens is R2, and the entrance pupil diameter of the imaging lens group is EPD, and the following conditions are satisfied: -10.42 < R2 / EPD < -2.

00.

5. The imaging lens assembly as described in claim 1, characterized in that, The focal length of the second lens is f2, and the thickness of the second lens on the optical axis is CT2, and the following conditions are satisfied: -11.48 < f2 / CT2 < 30.

11.

6. The imaging lens assembly as described in claim 1, characterized in that, The thickness of the third lens on the optical axis is CT3, and the radius of curvature of the object-side surface of the third lens is R5, and the following conditions are satisfied: 0.26 < CT3 / R5 < 2.

08.

7. The imaging lens assembly as described in claim 1, characterized in that, The maximum viewing angle of the imaging lens group is FOV, and the overall focal length of the imaging lens group is f, and the following conditions are satisfied: 30.09 < FOV / f < 49.

43.

8. The imaging lens assembly as described in claim 1, characterized in that, Half of the maximum viewing angle in the imaging lens group is HFOV, and the radius of curvature of the object-side surface of the second lens is R3, and the following conditions are satisfied: -11,5.99 < HFOV / R3 < -43.

33.

9. The imaging lens assembly as claimed in claim 1, characterized in that, The overall focal length of the imaging lens group is f, the distance on the optical axis from the object-side surface of the first lens to the imaging surface is TL, and the thickness of the third lens on the optical axis is CT3, and the following conditions are satisfied: 4.81 mm < f * TL / CT3 < 16.67 mm.

10. The imaging lens assembly as claimed in claim 1, characterized in that, The radius of curvature of the image-side surface of the first lens is R2, and the radius of curvature of the object-side surface of the third lens is R5, and the following conditions are satisfied: -17.40 < R2 / R5 < -2.

11.

11. The imaging lens assembly as claimed in claim 1, characterized in that, The first lens has an image-side surface radius of curvature R2, and the third lens has an image-side surface radius of curvature R6, satisfying the following condition: -2.95 <R2 / R6<0.55。 12. The imaging lens assembly as claimed in claim 1, characterized in that, The third lens has an image-side surface curvature radius R6, a focal length f3, and satisfies the following condition: -24.08 <R6 / f3<196.86。 13. The imaging lens assembly as claimed in claim 1, characterized in that, The third lens has a focal length of f3 and a thickness of CT3 along its optical axis, and satisfies the following condition: 0.00 <f3 / CT3<19.85。 14. The imaging lens assembly as claimed in claim 1, characterized in that, The thickness of the third lens along the optical axis is CT3, and the thickness of the second lens along the optical axis is CT2, satisfying the following condition: 0.86 <CT3 / CT2<6.25。 15. The imaging lens assembly as claimed in claim 1, characterized in that, The maximum viewing angle of this imaging lens group is FOV, and the distance from the object-side surface of the first lens to the imaging plane on the optical axis is TL, satisfying the following condition: 16.46 <FOV / TL<28.47。 16. The imaging lens assembly as claimed in claim 1, characterized in that, The maximum field of view (HFOV) in this imaging lens group is half of the maximum field of view. The radius of curvature R1 of the object-side surface of the first lens satisfies the following condition: 16.11 <HFOV / R1<40.24。 17. The imaging lens assembly as claimed in claim 1, characterized in that, The second lens has a focal length of f2, the distance from the object-side surface of the first lens to the imaging surface on the optical axis is TL, half of the maximum field of view in the imaging lens group is HFOV, and the following condition is satisfied: -12.36 < f2*TL / cos(HFOV) < 78.

43.

18. A camera module, characterized in that, include: One lens tube; The imaging lens group as described in any one of claims 1 to 17 is disposed in the lens barrel; as well as An image sensor is disposed on the imaging surface of the imaging lens group.

Images