Imaging lens assembly and camera module

Abstract

The present application provides an imaging lens, comprising, in order from the object side to the image side: an aperture; a first lens; a second lens; a third lens; a fourth lens; and a fifth lens; wherein the focal length of the second lens is f2, the focal length of the third lens is f3, the focal length of the fourth lens is f4, the radius of curvature of the object side surface of the third lens is R5, the radius of curvature of the object side surface of the fourth lens is R7, the distance between the object side surface of the first lens and the image surface on the optical axis is TL, and the following conditions are satisfied: 50.7 < f3*R7 / TL < 378.7, and -1375.8 < (f2 / f4)*R5 < -21.5.

Description

Technical Field

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

[0002] Due to the rapid development of semiconductor manufacturing technology, in order to facilitate portability, miniaturized optical lenses are essential for portable electronic devices. Achieving large aperture, high resolution, low distortion, and miniaturized optical lenses has become an important research direction.

[0003] Existing five-piece small lenses mounted on portable electronic devices such as mobile phones, tablets, and other wearable electronic devices often have sensitivity problems in manufacturing and assembly when having a large aperture, making mass production difficult and further resulting in higher manufacturing costs. In addition, in order to reduce assembly tolerances, the imaging quality of the periphery often needs to be sacrificed, making the imaging of the periphery blurred or distorted, which are all problems that urgently need to be improved. Summary of the Invention

[0004] The object of the present invention is to solve the problems of sensitivity and imaging quality of the five-piece small lens with a large aperture in the above-mentioned prior art. To achieve the above object, the present invention provides an imaging lens group, which sequentially includes from the object side to the image side: an aperture stop; a first lens having positive refractive power, the object-side surface of the first lens being convex near the optical axis, and the image-side surface of the first lens being concave near the optical axis; a second lens having negative refractive power, the image-side surface of the second lens being concave near the optical axis; a third lens having negative refractive power, the object-side surface of the third lens being convex near the optical axis, and the image-side surface of the third lens being concave near the optical axis; a fourth lens having positive refractive power, the object-side surface of the fourth lens being concave near the optical axis, and the image-side surface of the fourth lens being convex near the optical axis; and a fifth lens having negative refractive power, the image-side surface of the fifth lens being concave near the optical axis.

[0005] Wherein, the focal length of the second lens is f2, the focal length of the third lens is f3, the focal length of the fourth lens is f4, the radius of curvature of the object-side surface of the third lens is R5, the radius of curvature of the object-side surface of the fourth lens is R7, 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: 50.7 < f3 * R7 / TL < 378.7, and -1375.8 < (f2 / f4) * R5 < -21.5.

[0006] When the above imaging lens group satisfies 50.7 < f3 * R7 / TL < 378.7, and -1375.8 < (f2 / f4) * R5 < -21.5, by such appropriate configuration, the effects of reducing the sensitivity of the lens, reducing assembly tolerances, and improving imaging quality can be achieved simultaneously.

[0007] The imaging lens group contains a total of five lenses with refractive power.

[0008] The second lens has an image-side surface radius of curvature of R4, and the fourth lens has an object-side surface radius of curvature of R7, satisfying the following condition: -9.9 < R7 / R4 < -1.2. By properly configuring the image-side surface radius of curvature of the second lens and the object-side surface radius of curvature of the fourth lens, the field curvature of the imaging lens group can be effectively corrected, and the imaging quality of the periphery of the image can be improved.

[0009] The distance on the optical axis from the object-side surface of the first lens to the image-side surface of the fifth lens is TD, and the distance on the optical axis from the image-side surface of the fifth lens to the imaging plane is BFL, satisfying the following condition: 2.7 < TD / BFL < 4.9, thereby providing sufficient back focal length to avoid interference with the shape of the mechanism.

[0010] The distance from the image-side surface of the fifth lens to the imaging plane on the optical axis is BFL, the distance between the second lens and the third lens on the optical axis is T23, and the distance between the third lens and the fourth lens on the optical axis is T34, and the following condition is satisfied: 0.8 < BFL / (T23+T34) < 2.7, thereby providing suitable lens space and increasing the back focal length.

[0011] The second lens has an object-side surface curvature radius of R3, and the third lens has an object-side surface curvature radius of R5, satisfying the following condition: -2.6 < R5 / R3 < 4.2. This effectively corrects the field curvature of the imaging lens group and improves the peripheral imaging quality of the image.

[0012] The first lens has a focal length of f1, and the second lens has a focal length of f2, satisfying the following condition: -50.3 < f1 * f2 < -28.6. By distributing the refractive power of the imaging lens group more appropriately, it is beneficial to correct the aberrations of the imaging lens group and improve the imaging quality of the imaging lens group.

[0013] The distance from the object-side surface of the first lens to the imaging surface on the optical axis is TL, and the thickness of the second lens on the optical axis is CT2, satisfying the following condition: 15.2 < TL / CT2 < 30.6. By appropriately configuring the thickness of the second lens, the imaging range is increased.

[0014] The displacement of the point where the image-side surface of the fourth lens intersects the optical axis to the position of the maximum effective radius of the image-side surface of the fourth lens parallel to the optical axis is TDP8. The displacement of the point where the object-side surface of the fifth lens intersects the optical axis to the position of the maximum effective radius of the object-side surface of the fifth lens parallel to the optical axis is TDP9. The following condition must be satisfied: 0.2 < |TDP9 / TDP8| < 1.7. This balances the spacing between the lenses to improve the ability of the imaging lens group to correct astigmatism and field curvature.

[0015] The displacement parallel to the optical axis from the intersection of the object-side surface of the fourth lens on the optical axis to the maximum effective radius position of the object-side surface of the fourth lens is TDP7, and the displacement parallel to the optical axis from the intersection of the object-side surface of the fifth lens on the optical axis to the maximum effective radius position of the object-side surface of the fifth lens is TDP9, and the following condition is satisfied: 0.6 < |TDP9 / TDP7| < 1421.4, thereby balancing the lens spacing distance to improve the ability of the imaging lens group to correct astigmatism and field curvature.

[0016] The distance from the image-side surface of the fifth lens to the imaging plane on the optical axis is BFL, and the sum of the spacing distances of all adjacent lenses in the imaging lens group along the optical axis is ΣAT, and the following condition is satisfied: 0.5 < BFL / ΣAT < 1.2, by effectively adjusting the lens spacing distribution to increase the back focal length.

[0017] The maximum imaging height of the imaging lens group is IMH, and the radius of curvature of the object-side surface of the fourth lens is R7, and the following condition is satisfied: -161.5 < IMH*R7 < -33.1, by means of a better lens curvature configuration to increase the imaging range of the imaging lens group.

[0018] The radius of curvature of the object-side surface of the fifth lens is R9, half of the maximum viewing angle of the imaging lens group is HFOV, and the overall focal length of the imaging lens group is f, and the following condition is satisfied: -2664.0 < R9*HFOV / f < 70.9, by means of an appropriate combination of the curvatures and focal lengths between the lenses, the image receiving range can be expanded.

[0019] Half of the maximum viewing angle of the imaging lens group is HFOV, the overall focal length of the imaging lens group is f, and the radius of curvature of the image-side surface of the first lens is R2, and the following condition is satisfied: 11.4 < HFOV*f / R2 < 28.1, thereby balancing the curvatures and focal lengths between the lenses to expand the image receiving range.

[0020] The radius of curvature of the image-side surface of the first lens is R2, 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 third lens is R6, and the radius of curvature of the object-side surface of the fourth lens is R7, and the following condition is satisfied: -657 < (R7+R6) / (R2+R3) < -8.7, thereby effectively adjusting the lens spacing and curvature to achieve the effect of miniaturization.

[0021] The maximum viewing angle of the imaging lens group is FOV, and the following condition is satisfied: 59.2 < FOV < 99.7.

[0022] The radius of curvature of the object-side surface of the first lens is R1, the radius of curvature of the image-side surface of the first lens is R2, the radius of curvature of the object-side surface of the second lens is R3, and the radius of curvature of the object-side surface of the fourth lens is R7, and the following conditions are satisfied: -952.1 < R1 * R2 * R3 * R7 / (R1 + R2 + R3) < -79.0, which can effectively correct the field curvature of the lens group and improve the imaging quality of the peripheral part of the picture.

[0023] The distance from the object-side surface of the first lens to the imaging surface on the optical axis is TL, the radius of curvature of the image-side surface of the second lens is R4, the radius of curvature of the object-side surface of the fourth lens is R7, and the distance between the fourth lens and the fifth lens on the optical axis is T45, and the following conditions are satisfied:

[0024] -10.5 < TL * R4 / (T45 * R7) < -1.0, which can effectively adjust the lens spacing and curvature to achieve a miniaturized lens.

[0025] In addition, the present invention further provides an imaging module, comprising: 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.

[0026] Wherein, the imaging lens group sequentially includes, from the object side to the image side: a diaphragm; a first lens having 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; a second lens having negative refractive power, the image-side surface of the second lens is concave near the optical axis; a third lens having negative refractive power, the object-side surface of the third lens is convex near the optical axis, and the image-side surface of the third lens is concave near the optical axis; a fourth lens having 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; and a fifth lens having negative refractive power, the image-side surface of the first five lenses is concave near the optical axis.

[0027] Wherein, the focal length of the second lens is f2, the focal length of the third lens is f3, the focal length of the fourth lens is f4, the radius of curvature of the object-side surface of the third lens is R5, the radius of curvature of the object-side surface of the fourth lens is R7, and 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: 50.7 < f3 * R7 / TL < 378.7, and -1375.8 < (f2 / f4) * R5 < -21.5.

[0028] When the above imaging lens group satisfies 50.7 < f3 * R7 / TL < 378.7 and -1375.8 < (f2 / f4) * R5 < -21.5, by virtue of this appropriate configuration, the effects of兼顾降低透镜的敏感度、减小组装公差及提升成像品质 can be achieved. (It seems there is a Chinese phrase in this line that might be a bit unclear in its exact meaning in the context of English translation. The literal translation is "taking into account reducing the sensitivity of the lens, reducing assembly tolerances, and improving imaging quality", but it might need to be adjusted according to the specific technical meaning.)

[0029] The imaging lens group contains a total of five lenses with refractive power.

[0030] The imaging lens group has an image-side surface radius of curvature of R4 for the second lens and an object-side surface radius of curvature of R7 for the fourth lens, satisfying the following condition: -9.9 < R7 / R4 < -1.2. By appropriately configuring the image-side surface radius of curvature of the second lens and the object-side surface radius of curvature of the fourth lens, the field curvature of the imaging lens group can be effectively corrected, improving the imaging quality at the periphery of the image.

[0031] The imaging lens group has a distance TD between the object-side surface of the first lens and the image-side surface of the fifth lens on the optical axis, and a distance BFL between the image-side surface of the fifth lens and the imaging plane on the optical axis, satisfying the following condition: 2.7 < TD / BFL < 4.9, thereby providing sufficient back focal length to avoid interference with the shape of the mechanism.

[0032] The imaging lens group has a distance of BFL from the image-side surface of the fifth lens to the imaging plane on the optical axis, a distance of T23 between the second and third lenses on the optical axis, and a distance of T34 between the third and fourth lenses on the optical axis, and satisfies the following condition: 0.8 < BFL / (T23+T34) < 2.7, thereby providing suitable lens space and increasing the back focal length.

[0033] The imaging lens group has an object-side surface curvature radius of R3 for the second lens and an object-side surface curvature radius of R5 for the third lens, and satisfies the following condition: -2.6 < R5 / R3 < 4.2. This effectively corrects the field curvature of the imaging lens group and improves the peripheral imaging quality of the image.

[0034] The first lens has a focal length of f1, and the second lens has a focal length of f2, satisfying the following condition: -50.3 < f1 * f2 < -28.6. By distributing the refractive power of the imaging lens group more appropriately, it is beneficial to correct the aberrations of the imaging lens group and improve the imaging quality of the imaging lens group.

[0035] The imaging lens group has a distance of TL from the object-side surface of the first lens to the imaging surface on the optical axis, and a thickness of CT2 on the optical axis for the second lens, satisfying the following condition: 15.2 < TL / CT2 < 30.6. By appropriately configuring the thickness of the second lens, the imaging range is increased.

[0036] For the imaging lens group, the displacement parallel to the optical axis from the intersection point of the image side surface of the fourth lens on the optical axis to the position of the maximum effective radius of the image side surface of the fourth lens is TDP8, and the displacement parallel to the optical axis from the intersection point of the object side surface of the fifth lens on the optical axis to the position of the maximum effective radius of the object side surface of the fifth lens is TDP9, and the following condition is satisfied: 0.2 < |TDP9 / TDP8| < 1.7. Thereby, the spacing distance of the lenses is balanced to improve the ability of the imaging lens group to correct astigmatism and field curvature.

[0037] For the imaging lens group, the displacement parallel to the optical axis from the intersection point of the object side surface of the fourth lens on the optical axis to the position of the maximum effective radius of the object side surface of the fourth lens is TDP7, and the displacement parallel to the optical axis from the intersection point of the object side surface of the fifth lens on the optical axis to the position of the maximum effective radius of the object side surface of the fifth lens is TDP9, and the following condition is satisfied: 0.6 < |TDP9 / TDP7| < 1421.4. Thereby, the spacing distance of the lenses is balanced to improve the ability of the imaging lens group to correct astigmatism and field curvature.

[0038] For the imaging lens group, the distance on the optical axis from the image side surface of the fifth lens to the imaging plane is BFL, and the sum of the spacing distances of all adjacent lenses in the imaging lens group along the optical axis is ΣAT, and the following condition is satisfied: 0.5 < BFL / ΣAT < 1.2. By effectively adjusting the lens spacing distribution, the back focal length is increased.

[0039] For the imaging lens group, the maximum imaging height of the imaging lens group is IMH, and the radius of curvature of the object side surface of the fourth lens is R7, and the following condition is satisfied: -161.5 < IMH*R7 < -33.1. By means of a better lens curvature configuration, the imaging range of the imaging lens group is increased.

[0040] For the imaging lens group, the radius of curvature of the object side surface of the fifth lens is R9, half of the maximum viewing angle of the imaging lens group is HFOV, and the overall focal length of the imaging lens group is f, and the following condition is satisfied: -2664.0 < R9*HFOV / f < 70.9. By appropriately matching the curvatures and focal lengths between the lenses, the image receiving range can be expanded.

[0041] For the imaging lens group, half of the maximum viewing angle of the imaging lens group is HFOV, the overall focal length of the imaging lens group is f, and the radius of curvature of the image side surface of the first lens is R2, and the following condition is satisfied: 11.4 < HFOV*f / R2 < 28.1. Thereby, the curvatures and focal lengths between the lenses are balanced to expand the image receiving range.

[0042] The imaging lens group has an image-side surface curvature radius of R2 for the first lens, an object-side surface curvature radius of R3 for the second lens, an image-side surface curvature radius of R6 for the third lens, and an object-side surface curvature radius of R7 for the fourth lens, and satisfies the following condition: -657 < (R7 + R6) / (R2 + R3) < -8.7. This allows for effective adjustment of the lens spacing and curvature, achieving miniaturization.

[0043] The imaging lens group has a maximum field of view (FOV) and satisfies the following condition: 59.2 < FOV < 99.7.

[0044] The imaging lens group has an object-side surface curvature radius of R1 for the first lens, an image-side surface curvature radius of R2 for the first lens, an object-side surface curvature radius of R3 for the second lens, and an object-side surface curvature radius of R7 for the fourth lens. It satisfies the following condition: -952.1 < R1*R2*R3*R7 / (R1+R2+R3) < -79.0, which can effectively correct the field curvature of the lens group and improve the peripheral imaging quality of the image.

[0045] The imaging lens group has a distance of TL from the object-side surface of the first lens to the imaging surface on the optical axis, a radius of curvature of R4 on the image-side surface of the second lens, a radius of curvature of R7 on the object-side surface of the fourth lens, and a distance of T45 between the fourth and fifth lenses on the optical axis. It also satisfies the following condition: -10.5 < TL*R4 / (T45*R7) < -1.0. This allows for effective adjustment of the lens spacing and curvature to achieve a miniaturized lens.

[0046] The imaging lens group and camera module of the present invention can provide a high-quality lens with high resolution and low distortion. Another benefit of the present invention is to reduce manufacturing and assembly tolerance, thereby improving product quality and yield. Attached Figure Description

[0047] Figure 1A This is a schematic diagram of the imaging lens group according to the first embodiment of the present invention.

[0048] Figure 1B From left to right, the images show the field curvature and distortion curves of the imaging lens group in the first embodiment.

[0049] Figure 2A This is a schematic diagram of the imaging lens group according to the second embodiment of the present invention.

[0050] Figure 2B From left to right, the images show the field curvature and distortion curves of the imaging lens group in the second embodiment.

[0051] Figure 3A This is a schematic diagram of the imaging lens group according to the third embodiment of the present invention.

[0052] Figure 3B From left to right, the images show the field curvature and distortion curves of the imaging lens group in the third embodiment.

[0053] Figure 4A This is a schematic diagram of the imaging lens group according to the fourth embodiment of the present invention.

[0054] Figure 4B From left to right, the field curvature and distortion curves of the imaging lens group in the fourth embodiment are shown.

[0055] Figure 5A This is a schematic diagram of the imaging lens group according to the fifth embodiment of the present invention.

[0056] Figure 5B From left to right, the field curvature and distortion curves of the imaging lens group in the fifth embodiment are shown.

[0057] Figure 6A This is a schematic diagram of the imaging lens group according to the sixth embodiment of the present invention.

[0058] Figure 6B From left to right, the field curvature and distortion curves of the imaging lens group in the sixth embodiment are shown.

[0059] Figure 7A This is a schematic diagram of the imaging lens group according to the seventh embodiment of the present invention.

[0060] Figure 7B From left to right, the images show the field curvature and distortion curves of the imaging lens group in the seventh embodiment.

[0061] Figure 8 This is a schematic diagram of the camera module according to the eighth embodiment of the present invention.

[0062] Explanation of markings in the diagram:

[0063] 100, 200, 300, 400, 500, 600, 700: aperture

[0064] 110, 210, 310, 410, 510, 610, 710: First lens

[0065] 111, 211, 311, 411, 511, 611, 711: Object-side surface

[0066] 112, 212, 312, 412, 512, 612, 712: Image side surface

[0067] 120, 220, 320, 420, 520, 620, 720: Second lens

[0068] 121, 221, 321, 421, 521, 621, 721: Object-side surface

[0069] 122, 222, 322, 422, 522, 622, 722: Image side surface

[0070] 130, 230, 330, 430, 530, 630, 730: Third lens

[0071] 131, 231, 331, 431, 531, 631, 731: Object-side surface

[0072] 132, 232, 332, 432, 532, 632, 732: Image side surface

[0073] 140, 240, 340, 440, 540, 640, 740: Fourth lens

[0074] 141, 241, 341, 441, 541, 641, 741: Object-side surface

[0075] 142, 242, 342, 442, 542, 642, 742: Image side surface

[0076] 150, 250, 350, 450, 550, 650, 750: Fifth lens

[0077] 151, 251, 351, 451, 551, 651, 751: Object-side surface

[0078] 152, 252, 352, 452, 552, 652, 752: Image side surface

[0079] 160, 260, 360, 460, 560, 660, 760: Infrared filter

[0080] 180, 280, 380, 480, 580, 680, 780: Imaging plane

[0081] 190, 290, 390, 490, 590, 690, 790: Optical axis

[0082] 1000: Lens tube

[0083] 2000: Image Sensor

[0084] 3000: Imaging lens group

[0085] 4000: Camera Module

[0086] f: Overall focal length of the imaging lens group

[0087] Fno: Aperture value of the imaging lens group

[0088] FOV: Maximum field of view in the imaging lens group

[0089] HFOV: Half of the maximum field of view of the imaging lens group

[0090] TL: The distance along the optical axis from the object-side surface of the first lens to the imaging plane.

[0091] TD: The distance on the optical axis from the object-side surface of the first lens to the image-side surface of the fifth lens.

[0092] f1: Focal length of the first lens

[0093] f2: Focal length of the second lens

[0094] f3: Focal length of the third lens

[0095] f4: Focal length of the fourth lens

[0096] R1: Radius of curvature of the object-side surface of the first lens

[0097] R2: Radius of curvature of the image-side surface of the first lens

[0098] R3: Radius of curvature of the object-side surface of the second lens

[0099] R4: Radius of curvature of the image-side surface of the second lens

[0100] R5: Radius of curvature of the object-side surface of the third lens

[0101] R6: Radius of curvature of the image-side surface of the third lens

[0102] R7: Radius of curvature of the object-side surface of the fourth lens

[0103] R9: Radius of curvature of the object-side surface of the fifth lens

[0104] CT2: Thickness of the second lens on the optical axis

[0105] T23: The distance between the second and third lenses on the optical axis

[0106] T34: The distance between the third and fourth lenses on the optical axis

[0107] T45: The distance between the fourth and fifth lenses on the optical axis

[0108] BFL: The distance along the optical axis from the image-side surface of the third lens to the imaging plane.

[0109] TDP7: The displacement parallel to the optical axis from the point where the object-side surface of the fourth lens intersects the optical axis to the position of the maximum effective radius of the object-side surface of the fourth lens.

[0110] TDP8: The displacement parallel to the optical axis from the point where the image-side surface of the fourth lens intersects the optical axis to the position of the maximum effective radius of the image-side surface of the fourth lens.

[0111] TDP9: The displacement parallel to the optical axis from the point where the object-side surface of the fifth lens intersects the optical axis to the position of the maximum effective radius of the object-side surface of the fifth lens.

[0112] ΣAT: The sum of the distances between all adjacent lenses along the optical axis in the imaging lens group.

[0113] IMH: Maximum imaging height of the imaging lens group. Detailed Implementation

[0114] To enable those skilled in the art to understand and implement the present invention, appropriate embodiments are described below with reference to illustrations. Equivalent substitutions and modifications made based on the present invention are all included within the scope of the present invention. Furthermore, it should be stated that the illustrations accompanying the present invention are not depictions of actual dimensions. Although the present invention provides embodiments with specific parameters, it should be understood that the parameters do not need to be exactly equal to their corresponding values; within an acceptable error range, they approximate their corresponding parameters. The following embodiments will further describe the technical content of the present invention in detail, but the disclosed content is not intended to limit the scope of the present invention.

[0115] <First Embodiment>

[0116] Please refer to Figure 1A and Figure 1B ,in, Figure 1A This is a schematic diagram of the imaging lens group according to the first embodiment of the present invention. Figure 1B From left to right, the images show the field curvature and distortion curves of the imaging lens group in the first embodiment. Figure 1A It can be seen that the imaging lens group includes, from the object side to the image side, the following components in sequence: an aperture stop 100, a first lens 110, a second lens 120, a third lens 130, a fourth lens 140, a fifth lens 150, an infrared filter 160, and an imaging surface 180; wherein the imaging lens group has five refractive lenses, but is not limited to this.

[0117] 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.

[0118] 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 concave near the optical axis 190. Both the object-side surface 121 and the image-side surface 122 are aspherical.

[0119] The third lens 130 has negative 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 concave near the optical axis 190. Both the object-side surface 131 and the image-side surface 132 are aspherical.

[0120] 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.

[0121] The fifth lens 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.

[0122] The infrared cut filter 160 is made of glass and is disposed between the fifth lens 150 and the imaging surface 180 without affecting the focal length of the imaging lens group. It can be understood that the infrared cut filter 160 element can also be formed on the lens surface, and the infrared cut filter 160 can also be made of other materials.

[0123] The equations for the aspherical surfaces of the above lenses are expressed as follows:

[0124]

[0125] 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.

[0126] In the first embodiment, the overall focal length of the imaging lens group is f, the aperture value (f-number) of the imaging lens group is Fno, and the maximum angle of view in the imaging lens group is FOV, with the following values: f = 4.77 (mm); Fno = 1.87; and FOV = 79.23 (degrees).

[0127] In the imaging lens group of the first embodiment, the focal length of the second lens 120 is f2, the focal length of the third lens 130 is f3, the focal length of the fourth lens 140 is f4, the radius of curvature of the object-side surface 131 of the third lens 130 is R5, the radius of curvature of the object-side surface 141 of the fourth lens 140 is R7, and the distance from the object-side surface 111 of the first lens 110 to the imaging surface 180 on the optical axis is TL, and the following conditions are satisfied: f3*R7 / TL=217.76, and (f2 / f4)*R5=-877.02.

[0128] In the imaging lens group of the first embodiment, the radius of curvature of the image-side surface 122 of the second lens 120 is R4, the radius of curvature of the object-side surface 141 of the fourth lens 140 is R7, and the following condition is satisfied: R7 / R4=-4.19.

[0129] In the imaging lens group of the first embodiment, the distance from the object-side surface 111 of the first lens 110 to the image-side surface 152 of the fifth lens 150 on the optical axis 190 is TD, and the distance from the image-side surface 152 of the fifth lens 150 to the imaging surface 180 on the optical axis 190 is BFL, and the following condition is satisfied: TD / BFL = 3.48.

[0130] In the imaging lens group of the first embodiment, the distance from the image-side surface 152 of the fifth lens 150 to the imaging surface 180 on the optical axis is BFL, the distance between the second lens 120 and the third lens 130 on the optical axis 190 is T23, 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: BFL / (T23+T34)=1.06.

[0131] In the imaging lens group of the first embodiment, the object-side surface 121 of the second lens 120 has a radius of curvature of R3, and the object-side surface 131 of the third lens 130 has a radius of curvature of R5, and satisfies the following condition: R5 / R3=-0.65.

[0132] 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=-41.81.

[0133] In the imaging lens group of the first embodiment, the distance from the object-side surface 111 of the first lens 110 to the imaging surface 180 on the optical axis 190 is TL, the thickness of the second lens 120 on the optical axis 190 is CT2, and the following condition is satisfied: TL / CT2 = 21.97.

[0134] In the imaging lens group of the first embodiment, the displacement of the point where the image-side surface 142 of the fourth lens 140 intersects the optical axis 190 to the position of the maximum effective radius of the image-side surface 142 of the fourth lens 140 parallel to the optical axis 190 is TDP8, and the displacement of the point where the object-side surface 151 of the fifth lens 150 intersects the optical axis 190 to the position of the maximum effective radius of the object-side surface 151 of the fifth lens 150 parallel to the optical axis 190 is TDP9, and the following condition is satisfied: |TDP9 / TDP8|=0.26.

[0135] In the imaging lens group of the first embodiment, the displacement of the point where the object-side surface 141 of the fourth lens 140 intersects the optical axis on the optical axis to the position of the maximum effective radius of the object-side surface 141 of the fourth lens 140 parallel to the optical axis 190 is TDP7, and the displacement of the point where the object-side surface 151 of the fifth lens 150 intersects the optical axis 190 to the position of the maximum effective radius of the object-side surface 151 of the fifth lens 150 parallel to the optical axis 190 is TDP9, and the following condition is satisfied: |TDP9 / TDP7|=0.75.

[0136] In the imaging lens group of the first embodiment, the distance from the image-side surface 152 of the fifth lens 150 to the imaging surface 180 on the optical axis 190 is BFL, the sum of the spacing distances of all adjacent lenses in the imaging lens group along the optical axis 190 is ΣAT, and the following condition is satisfied: BFL / ΣAT=0.80.

[0137] In the imaging lens group of the first embodiment, the maximum imaging height of the imaging lens group is IMH, the radius of curvature of the object-side surface 141 of the fourth lens 140 is R7, and the following conditions are satisfied:

[0138] IMH*R7 = -121.77.

[0139] In the imaging lens group of the first embodiment, the radius of curvature of the object-side surface 151 of the fifth lens 150 is R9, half of the maximum field of view of the imaging lens group is HFOV, the overall focal length of the imaging lens group is f, and the following condition is satisfied: R9*HFOV / f=-170.35.

[0140] In the imaging lens group of the first embodiment, half of the maximum field of view of the imaging lens group is HFOV, the overall focal length of the imaging lens group is f, the radius of curvature of the image side surface 112 of the first lens 110 is R2, and the following condition is satisfied: HFOV*f / R2=16.78.

[0141] In the imaging lens group of the first embodiment, the radius of curvature of the image-side surface 112 of the first lens 110 is R2, the radius of curvature of the object-side surface 121 of the second lens 120 is R3, the radius of curvature of the image-side surface 132 of the third lens 130 is R6, and the radius of curvature of the object-side surface 141 of the fourth lens 140 is R7, and satisfies the following condition: (R7+R6) / (R2+R3)=-387.92.

[0142] In the imaging lens group of the first embodiment, the radius of curvature of the object-side surface 112 of the first lens 110 is R1, the radius of curvature of the image-side surface 112 of the first lens 110 is R2, the radius of curvature of the object-side surface 121 of the second lens 120 is R3, and the radius of curvature of the object-side surface 141 of the fourth lens 140 is R7, and satisfies the following condition: R1*R2*R3*R7 / (R1+R2+R3)=-652.66.

[0143] In the imaging lens group of the first embodiment, the distance on the optical axis from the object-side surface 111 of the first lens 110 to the imaging surface 180 is TL, the radius of curvature of the image-side surface 122 of the second lens 120 is R4, the radius of curvature of the object-side surface 141 of the fourth lens 140 is R7, the distance on the optical axis between the fourth lens 140 and the fifth lens 150 is T45, and the following condition is satisfied: TL*R4 / (T45*R7)=-4.78.

[0144] Please refer to Table 1 and Table 2 below.

[0145]

[0146]

[0147]

[0148] Table 1 shows... Figure 1AThe first embodiment provides detailed structural data, where the units for radius of curvature, thickness, gap, and focal length are mm. Surfaces 0-14 sequentially represent surfaces from the object side to the image side. Surface 0 represents the gap between the object and the aperture 100 along the optical axis 190; surface 1 represents the gap between the aperture 100 and the object-side surface 111 of the first lens 110 along the optical axis 190. Since the object-side surface 111 of the first lens 110 is closer to the object side than the aperture 100, it is represented by a negative value. Conversely, if the aperture 100 is closer to the object side than the object-side surface 111 of the first lens 110, it is represented by a positive value. Surfaces 2, 4, 6, 8, 10, and 12 represent the first lens 110, the second lens 120, and the third lens 110, respectively. 30. The thickness of the fourth lens 140, the fifth lens 150, and the infrared filter 160 on the optical axis 190; surfaces 3, 5, 7, 9, 11, and 13 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 fourth lens 140, the gaps on the optical axis 190 between the fourth lens 140 and the fifth lens 150, the gaps on the optical axis 190 between the fifth lens 150 and the infrared filter 160, and the gaps on the optical axis 190 between the infrared filter 160 and the imaging surface 180.

[0149] Table 2 shows the aspherical data in the first embodiment, where k represents the cone coefficient in the aspherical curve equation, and A2, A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, and A24 are higher-order aspherical coefficients. Furthermore, the tables in the following embodiments are corresponding schematic diagrams and aberration curves for each embodiment. The definitions of the data in the embodiment tables are the same as those in Tables 1 and 2 of the first embodiment, and will not be repeated here.

[0150] <Second Embodiment>

[0151] Please refer to Figure 2A and Figure 2B ,in, Figure 2A This is a schematic diagram of the imaging lens group according to the second embodiment of the present invention. Figure 2B From left to right, the images show the field curvature and distortion curves of the imaging lens group in the second embodiment. Figure 2A It can be seen that the imaging lens group includes, from the object side to the image side, the following components in sequence: an aperture stop 200, a first lens 210, a second lens 220, a third lens 230, a fourth lens 240, a fifth lens 250, an infrared filter 260, and an imaging surface 280; wherein the imaging lens group has five refractive lenses, but is not limited to this.

[0152] 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.

[0153] 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 concave near the optical axis 290. Both the object-side surface 221 and the image-side surface 222 are aspherical.

[0154] The third lens 230 has negative 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.

[0155] 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.

[0156] The fifth lens 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. The infrared cut filter 260 is made of glass and is disposed between the fifth lens 250 and the imaging surface 280 without affecting the focal length of the imaging lens group. It can be understood that the infrared cut filter element 260 can also be formed on the lens surface, and the infrared cut filter 260 can also be made of other materials.

[0157] Please refer to Table 3 and Table 4 below.

[0158]

[0159]

[0160]

[0161]

[0162] 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.

[0163] By referring to Tables 3 and 4, the following data can be calculated:

[0164]

[0165] <Third Embodiment>

[0166] Please refer to Figure 3A and Figure 3B ,in, Figure 3A This is a schematic diagram of the imaging lens group according to the third embodiment of the present invention. Figure 3B From left to right, the images show the field curvature and distortion curves of the imaging lens group in the third embodiment. Figure 3A It can be seen that the imaging lens group includes, from the object side to the image side, the following components in sequence: an aperture stop 300, a first lens 310, a second lens 320, a third lens 330, a fourth lens 340, a fifth lens 350, an infrared filter 360, and an imaging surface 380; wherein the imaging lens group has five refractive lenses, but is not limited to this.

[0167] 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.

[0168] 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 concave near the optical axis 390. Both the object-side surface 321 and the image-side surface 322 are aspherical.

[0169] The third lens 330 has negative 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 concave near the optical axis 390. Both the object-side surface 331 and the image-side surface 332 are aspherical.

[0170] 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.

[0171] The fifth lens 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. The infrared cut filter 360 is made of glass and is disposed between the fifth lens 350 and the imaging surface 380 without affecting the focal length of the imaging lens group. It can be understood that the infrared cut filter element 360 can also be formed on the lens surface, and the infrared cut filter 360 can also be made of other materials.

[0172] Please refer to Table 5 and Table 6 below.

[0173]

[0174]

[0175]

[0176] 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.

[0177] By referring to Tables 5 and 6, the following data can be calculated:

[0178]

[0179]

[0180] <Fourth Embodiment>

[0181] Please refer to Figure 4A and Figure 4B ,in, Figure 4A This is a schematic diagram of the imaging lens group according to the fourth embodiment of the present invention. Figure 4B From left to right, the images show the field curvature and distortion curves of the imaging lens group in the fourth embodiment. Figure 4A It can be seen that the imaging lens group includes, from the object side to the image side, the following components in sequence: an aperture stop 400, a first lens 410, a second lens 420, a third lens 430, a fourth lens 440, a fifth lens 450, an infrared filter 460, and an imaging surface 480; wherein the imaging lens group has five refractive lenses, but is not limited to this.

[0182] 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.

[0183] 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 concave near the optical axis 490. Both the object-side surface 421 and the image-side surface 422 are aspherical.

[0184] The third lens 430 has negative 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.

[0185] The fourth lens 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.

[0186] The fifth lens 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.

[0187] The infrared cut filter 460 is made of glass and is disposed between the fifth lens 450 and the imaging surface 480 without affecting the focal length of the imaging lens group. It can be understood that the infrared cut filter 460 element can also be formed on the lens surface, and the infrared cut filter 460 can also be made of other materials.

[0188] Please refer to Table 7 and Table 8 below.

[0189]

[0190]

[0191]

[0192]

[0193] 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.

[0194] By referring to Tables 7 and 8, the following data can be calculated:

[0195]

[0196] <Fifth Embodiment>

[0197] Please refer to Figure 5A and Figure 5B ,in, Figure 5A This is a schematic diagram of the imaging lens group according to the fifth embodiment of the present invention. Figure 5B From left to right, the images show the field curvature and distortion curves of the imaging lens group in the fifth embodiment. Figure 5A It can be seen that the imaging lens group includes, from the object side to the image side, the following components in sequence: an aperture stop 500, a first lens 510, a second lens 520, a third lens 530, a fourth lens 540, a fifth lens 550, an infrared filter 560, and an imaging surface 580; wherein the imaging lens group has five refractive lenses, but is not limited to this.

[0198] 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.

[0199] 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 concave near the optical axis 590. Both the object-side surface 521 and the image-side surface 522 are aspherical.

[0200] The third lens 530 has negative 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.

[0201] 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.

[0202] The fifth lens 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.

[0203] The infrared cut filter 560 is made of glass and is disposed between the fifth lens 550 and the imaging surface 580 without affecting the focal length of the imaging lens group. It can be understood that the infrared cut filter 560 element can also be formed on the lens surface, and the infrared cut filter 560 can also be made of other materials.

[0204] Please refer to Table 9 and Table 10 below.

[0205]

[0206]

[0207]

[0208] 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.

[0209] By referring to Tables 9 and 10, the following data can be calculated:

[0210]

[0211]

[0212] <Sixth Embodiment>

[0213] Please refer to Figure 6A and Figure 6B ,in, Figure 6A This is a schematic diagram of the imaging lens group according to the sixth embodiment of the present invention. Figure 6B From left to right, the images show the field curvature and distortion curves of the imaging lens group in the sixth embodiment. Figure 5A It is known that the imaging lens group includes, from the object side to the image side, the following components in sequence: a first lens 610, a second lens 620, a third lens 630, a fourth lens 640, a fifth lens 650, an infrared filter 660, and an imaging surface 680; wherein the imaging lens group contains five lenses with refractive power, but is not limited to this.

[0214] 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.

[0215] 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.

[0216] The third lens 630 has negative 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 concave near the optical axis 690. Both the object-side surface 631 and the image-side surface 632 are aspherical.

[0217] 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.

[0218] The fifth lens 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.

[0219] The infrared cut filter 660 is made of glass and is disposed between the fifth lens 650 and the imaging surface 680 without affecting the focal length of the imaging lens group. It can be understood that the infrared cut filter 660 element can also be formed on the lens surface, and the infrared cut filter 660 can also be made of other materials.

[0220] Please refer to Table 11 and Table 12 below.

[0221]

[0222]

[0223]

[0224]

[0225] 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.

[0226] By referring to Tables 11 and 12, the following data can be calculated:

[0227]

[0228] <Seventh Embodiment>

[0229] Please refer to Figure 7A and Figure 7B ,in, Figure 7A This is a schematic diagram of the imaging lens group according to the seventh embodiment of the present invention. Figure 7B From left to right, the images show the field curvature and distortion curves of the imaging lens group in the seventh embodiment. Figure 5A It is known that the imaging lens group includes, from the object side to the image side, the following components in sequence: an aperture stop 700, a first lens 710, a second lens 720, a third lens 730, a fourth lens 740, a fifth lens 750, an infrared filter 760, and an imaging surface 780; wherein the imaging lens group contains five lenses with refractive power, but is not limited to this.

[0230] 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.

[0231] 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.

[0232] The third lens 730 has negative 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.

[0233] 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.

[0234] The fifth lens 750 has negative refractive power and is made of plastic. Its object-side surface 751 is convex 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.

[0235] The infrared cut filter 760 is made of glass and is disposed between the fifth lens 750 and the imaging surface 780 without affecting the focal length of the imaging lens group. It can be understood that the infrared cut filter 760 element can also be formed on the lens surface, and the infrared cut filter 760 can also be made of other materials.

[0236] Please refer to Table 13 and Table 14 below.

[0237]

[0238]

[0239]

[0240] 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.

[0241] By referring to Tables 13 and 14, the following data can be calculated:

[0242]

[0243]

[0244] <Eighth Embodiment>

[0245] Please refer to Figure 8 , Figure 8 The camera module 4000 of the eighth embodiment of the present invention includes a lens barrel 1000, an imaging lens group 3000, and an image sensor 2000. The imaging lens group 3000 can be the imaging lens group of the above embodiments. The imaging lens group 3000 is disposed in the lens barrel 1000. The image sensor 2000 is disposed on the imaging surface of the imaging lens group and is an electronic photosensitive element (such as CMOS or CCD) with good photosensitivity and low noise, so as to truly present the imaging quality of the imaging lens group.

[0246] In the foregoing embodiments, those skilled in the art should understand that in the imaging lens group provided by the present invention, the lens can be made of glass or plastic. A glass lens can increase the degree of freedom in the refractive power configuration of the imaging lens group, and the glass lens can be made by related technologies such as grinding or molding, while a plastic lens can reduce production costs.

[0247] 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.

[0248] The imaging lens group provided by this invention can be applied to optical systems that require high imaging quality and miniaturization, and can be used in various electronic imaging systems such as mobile phones, laptops, digital tablets, mobile devices, digital cameras, automotive photography, or drones.

[0249] The embodiments described above are merely preferred embodiments for fully illustrating the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are all within the scope of protection of the present invention. The scope of protection of the present invention is defined by the claims.

Claims

1. An imaging lens assembly, characterized in that, From object side to image side, the following are included in sequence: A single beam; A first lens has 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. A second lens with negative refractive power, wherein the image-side surface of the second lens is concave near the optical axis; A third lens with negative refractive power, wherein the object-side surface of the third lens is convex near the optical axis and the image-side surface of the third lens is concave near the optical axis; A fourth lens having positive refractive power, wherein 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; and A fifth lens with negative refractive power, wherein the image-side surface of the fifth lens is concave near the optical axis; The imaging lens group comprises five refractive lenses. The focal length of the second lens is f2, the focal length of the third lens is f3, and the focal length of the fourth lens is f4. The radius of curvature of the image-side surface of the first lens is R2, 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 third lens is R5, the radius of curvature of the image-side surface of the third lens is R6, and the radius of curvature of the object-side surface of the fourth lens is R7. The distance from the object-side surface of the first lens to the imaging plane on the optical axis is TL, and the following conditions are satisfied: 50.7mm < f3*R7 / TL < 378.7mm, -1375.8mm<(f2 / f4)*R5<-21.5mm, and -657<(R7+R6) / (R2+R3)<-8.

7.

2. The imaging lens assembly as described in claim 1, characterized in that, The second lens has an image-side surface radius of curvature of R4, and the fourth lens has an object-side surface radius of curvature of R7, satisfying the following condition: -9.9 < R7 / R4 < -1.

2.

3. The imaging lens assembly as described in claim 1, characterized in that, The distance on the optical axis from the object-side surface of the first lens to the image-side surface of the fifth lens is TD, and the distance on the optical axis from the image-side surface of the fifth lens to the imaging plane is BFL, satisfying the following condition: 2.7 < TD / BFL < 4.

9.

4. The imaging lens assembly as described in claim 1, characterized in that, The distance from the image-side surface of the fifth lens to the imaging plane on the optical axis is BFL, the distance between the second lens and the third lens on the optical axis is T23, and the distance between the third lens and the fourth lens on the optical axis is T34, and the following condition is satisfied: 0.8 < BFL / (T23+T34) < 2.

7.

5. The imaging lens assembly as described in claim 1, characterized in that, The second lens has an object-side surface curvature radius of R3, and the third lens has an object-side surface curvature radius of R5, satisfying the following condition: -2.6 < R5 / R3 < 4.

2.

6. The imaging lens assembly as described in claim 1, characterized in that, The first lens has a focal length of f1, and the second lens has a focal length of f2, satisfying the following condition: -50.3mm 2 <f1*f2<-28.6mm 2 .

7. The imaging lens assembly as described in claim 1, characterized in that, The distance from the object-side surface of the first lens to the imaging surface on the optical axis is TL, and the thickness of the second lens on the optical axis is CT2, satisfying the following condition: 15.2 < TL / CT2 < 30.

6.

8. The imaging lens assembly as described in claim 1, characterized in that, The displacement of the point where the image-side surface of the fourth lens intersects the optical axis to the position of the maximum effective radius of the image-side surface of the fourth lens parallel to the optical axis is TDP8. The displacement of the point where the object-side surface of the fifth lens intersects the optical axis to the position of the maximum effective radius of the object-side surface of the fifth lens parallel to the optical axis is TDP9, and the following condition is satisfied: 0.2 < |TDP9 / TDP8| < 1.

7.

9. The imaging lens assembly as described in claim 1, characterized in that, The displacement of the point where the object-side surface of the fourth lens intersects the optical axis to the position of the maximum effective radius of the object-side surface of the fourth lens parallel to the optical axis is TDP7. The displacement of the point where the object-side surface of the fifth lens intersects the optical axis to the position of the maximum effective radius of the object-side surface of the fifth lens parallel to the optical axis is TDP9, and the following condition is satisfied: 0.6 < |TDP9 / TDP7| < 1421.

4.

10. The imaging lens assembly as claimed in claim 1, characterized in that, The distance from the image-side surface of the fifth lens to the imaging plane on the optical axis is BFL. The sum of the spacing distances along the optical axis of all adjacent lenses in the imaging lens group is ΣAT, and the following condition is satisfied: 0.5 < BFL / ΣAT < 1.

2.

11. The imaging lens assembly as claimed in claim 1, characterized in that, The maximum imaging height of this imaging lens group is 1MH, the radius of curvature of the object-side surface of the fourth lens is R7, and it satisfies the following condition: -161.5mm. 2 <IMH*R7<-33.1mm 2 .

12. The imaging lens assembly as claimed in claim 1, characterized in that, The fifth lens has a radius of curvature of R9 on its object-side surface. Half of the maximum field of view of this imaging lens group is HFOV. The overall focal length of this imaging lens group is f, and it satisfies the following condition: -2664.0° <R9*HFOV / f<70.9°。 13. The imaging lens assembly as claimed in claim 1, characterized in that, The maximum field of view of the imaging lens group is half of HFOV, the overall focal length of the imaging lens group is f, the radius of curvature of the image side surface of the first lens is R2, and the following conditions are satisfied: 11.4°<HFOV*f / R2<28.1°.

14. A camera module, characterized in that, include: One lens tube; An imaging lens assembly as described in any one of claims 1 to 13 is disposed in the lens barrel; and An image sensor is disposed on the imaging surface of the imaging lens group.

Images