Imaging lens group and camera module

Abstract

The invention discloses an imaging lens group and a camera module, and the imaging lens group comprises a diaphragm, and sequentially comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens from an object side to an image side. A second lens element; a third lens element; a fourth lens element; a fifth lens element; and a sixth lens element. Wherein the refractive index of the third lens is nd3, the thickness of the third lens on the optical axis is CT3, the incident pupil diameter of the imaging lens group is EPD, and the following condition is satisfied: (nd3 * CT3) / EPD is more than 2.64 and less than 4.55.

Description

Technical Field

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

[0002] In recent years, IPCAM and drone cameras have experienced rapid development; however, in these applications, there is still a lack of wide-angle lenses with large apertures that can take into account both visible light and infrared light bands. In addition, the designs of these previous technologies usually do not have a large imaging height, and if they are used with image sensing elements with a large effective area, dark corners are prone to occur. Furthermore, if imaging problems caused by temperature changes are to be solved, a design with multiple glass lenses is usually required, which increases costs.

[0003] Specifically, large aperture wide-angle lenses in prior art rarely meet the requirements of both visible light and infrared light bands; wide-angle lens designs in prior art usually do not have a large imaging height, which limits the size of available image sensing elements and may produce vignetting effects; and, in terms of imaging problems under temperature changes, a common solution is to use a design with multiple glass lenses, but this increases cost and complexity. Summary of the invention

[0004] The object of the present invention is to solve the problems of the above-mentioned prior art. To achieve the above-mentioned object, the present invention provides an imaging lens group, comprising an aperture, and comprising, from the object side to the image side, in order: a first lens having negative refractive power, wherein the object side surface of the first lens is concave near the optical axis; a second lens having negative refractive power; a third lens having positive refractive power; a fourth lens having positive refractive power; a fifth lens having negative refractive power; and a sixth lens having positive refractive power.

[0005] Among them, the total number of lenses with refractive power in the imaging lens group is six, the refractive index of the third lens is nd3, the thickness of the third lens on the optical axis is CT3, the incident pupil diameter of the imaging lens group is EPD, and the following conditions are satisfied: 2.64<(nd3*CT3) / EPD<4.55.

[0006] When the imaging lens group satisfies 2.64<(nd3*CT3) / EPD<4.55, the manufacturability of the imaging lens group can be improved by selecting the material of the third lens, the thickness of the third lens and the appropriate configuration of the entrance pupil diameter, while reducing the impact of temperature changes on imaging quality.

[0007] The Abbe coefficient of the third lens is vd3, the refractive index of the third lens is nd3, the focal length of the third lens is f3, and the following conditions are met: 0.82 (mm -1)<vd3 / (nd3*f3)<2.81(mm -1 ), the imaging quality of the imaging lens group can be improved by selecting the material of the third lens and configuring the refractive power appropriately.

[0008] The Abbe coefficient of the third lens is vd3, the sum of the spacing distances of all adjacent lenses in the imaging lens group along the optical axis is ΣAT, the refractive index of the third lens is nd3, the focal length of the third lens is f3, and the following conditions are satisfied: 4.55<(vd3*ΣAT) / (nd3*f3)<18.52. By selecting the third lens material, the refractive power and the appropriate configuration of the lens spacing of the imaging lens group, the third lens has better formability to facilitate manufacturing and reduce production costs.

[0009] The combined focal length of the fourth lens, the fifth lens and the sixth lens is f456, the overall focal length of the imaging lens group is f, the entrance pupil diameter of the imaging lens group is EPD, and the following conditions are met: 0.81 (mm -1 )<f456 / (f*EPD)<1.31(mm -1 ), through the appropriate configuration of the refractive power and entrance pupil diameter of the imaging lens group, it is beneficial to improve the confocality of the imaging lens group in the visible light band and the infrared light band.

[0010] The sum of the spacing distances of all adjacent lenses in the imaging lens group along the optical axis is ΣAT, the thickness of the second lens on the optical axis is CT2, the thickness of the third lens on the optical axis is CT3, and the following conditions are satisfied: 15.68 (mm)<ΣAT*CT3 / (CT2)<43.12 (mm). The appropriate configuration of lens thickness and lens spacing helps to reduce the sensitivity of the imaging lens group and reduce assembly tolerance.

[0011] The object side surface curvature radius of the third lens is R5, the object side surface curvature radius of the fourth lens is R7, the incident pupil diameter of the imaging lens group is EPD, and the following conditions are satisfied: 1.04 (mm)<(R5 / R7)*EPD<22.66 (mm). By properly configuring the ratio of the lens curvature to the entrance pupil diameter, the temperature drift phenomenon caused by temperature changes is effectively reduced to ensure excellent imaging quality.

[0012] The distance from the object side surface of the first lens to the imaging surface on the optical axis is TL, the spacing distance between the second lens and the third lens on the optical axis is T23, and the spacing distance between the fifth lens and the sixth lens on the optical axis is T56, and the following conditions are satisfied: 32.06<TL / (T23+T56)<102.41, thereby making the lens spacing configuration and the height of the imaging lens group more suitable, thereby reducing the ghost reflection problem of the imaging lens group.

[0013] The focal length of the third lens is f3, 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: 0.33 (mm) < f3 * CT3 / R5 < 2.55 (mm). Thus, the appropriate configuration of the parameters of the third lens helps to improve the manufacturability of the imaging lens group and at the same time reduces the influence of temperature change on the imaging quality.

[0014] The radius of curvature of the object-side surface of the fifth lens is R9, the focal length of the fourth lens is f4, and the focal length of the fifth lens is f5, and the following conditions are satisfied: -6.61 (mm -1 ) < R9 / (f4 * f5) < -0.25 (mm -1 ) Thus, the appropriate configuration of the refractive power and curvature of the lenses is beneficial to improving the confocal property of the imaging lens group in the visible light band and the infrared light band.

[0015] The angle at which the chief ray of the maximum viewing angle of the imaging lens group enters the imaging surface is CRA, the radius of curvature of the object-side surface of the fifth lens is R9, and the maximum viewing angle of the imaging lens group is FOV, and the following conditions are satisfied: 1.12 (mm) < CRA * R9 / FOV < 30.28 (mm). Thus, the configuration of the incident angle of the chief ray and the curvature of the lens of the imaging lens group is relatively appropriate, so that the imaging lens group has an ultra-wide angle and is beneficial to correcting the aberration of the imaging lens group.

[0016] The angle at which the chief ray of the maximum viewing angle of the imaging lens group enters the imaging surface is CRA, the radius of curvature of the object-side surface of the third lens is R5, and the maximum imaging height of the imaging lens group is IMH, and the following conditions are satisfied: 0.47 < tan(CRA) * R5 / IMH < 6.35. Thus, the configuration of the incident angle of the chief ray, the curvature of the lens, and the imaging height of the imaging lens group is relatively appropriate, which is beneficial to achieving the best imaging quality.

[0017] The angle at which the chief ray of the maximum viewing angle of the imaging lens group enters the imaging surface is CRA, the radius of curvature of the object-side surface of the fourth lens is R7, the radius of curvature of the object-side surface of the fifth lens is R9, the distance from the image-side surface of the sixth lens to the imaging surface on the optical axis is BFL, and the overall focal length of the imaging lens group is f, and the following conditions are satisfied: 0.02 (degrees / mm 2 ) < (CRA * R7) / (R9 * BFL * f) < 1.79 (degrees / mm 2 ) Thus, the incident angle of the chief ray, the curvature and refractive power of the lens, and the back focal space are optimally configured, so that the imaging lens group has better relative illumination and meets the back focal requirements of the imaging lens group.

[0018] 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 second lens is R4, and the distance from the image-side surface of the sixth lens to the imaging surface on the optical axis is BFL, and the following conditions are satisfied: -106.64 (mm) < (R1 / R4) * BFL < -29.68 (mm). Thus, the lens curvature and the back focal space are properly configured to meet the back focal requirements of the imaging lens group and improve the imaging quality of the imaging lens group.

[0019] The maximum viewing angle of the imaging lens group is FOV, 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 third lens is R5, and the following conditions are satisfied:

[0020] -258.69 (degrees) < (FOV / R1) * R5 < -8.76 (degrees). Thus, the proper configuration of the maximum viewing angle and the lens curvature can effectively enhance its wide-angle characteristics and provide a larger viewing angle, which is beneficial to improving the imaging quality of the imaging lens group.

[0021] The radius of curvature of the object-side surface of the third lens is R5, and the radius of curvature of the image-side surface of the third lens is R6, and the following conditions are satisfied: -9.85 < R5 / R6 < -0.67. Thus, the proper configuration of the curvature of the third lens helps to improve the manufacturability of the third lens.

[0022] The focal length of the second lens is f2, and the focal length of the third lens is f3, and the following conditions are satisfied: -1.96 < f2 / f3 < -0.87. Thus, the refractive power of the lenses of the imaging lens group has a better configuration, and at the same time, the influence of temperature change on the imaging quality is reduced.

[0023] The thickness of the second lens on the optical axis is CT2, the thickness of the fourth lens on the optical axis is CT4, the thickness of the fifth lens on the optical axis is CT5, the thickness of the sixth lens on the optical axis is CT6, and the entrance pupil diameter of the imaging lens group is EPD, and the following conditions are satisfied: 5.40 (mm) < (CT4 + CT5 + CT6) * EPD / CT2 < 14.83 (mm). Thus, the lens thickness and the entrance pupil diameter have a better configuration to reduce the assembly tolerance and improve the imaging quality of the imaging lens group.

[0024] 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.

[0025] The imaging lens group includes a light barrier, which includes, from the object side to the image side, a first lens having negative refractive power, wherein the object side surface of the first lens is concave near the optical axis; a second lens having negative refractive power; a third lens having positive refractive power; a fourth lens having positive refractive power; a fifth lens having negative refractive power; and a sixth lens having positive refractive power.

[0026] Among them, the total number of lenses with refractive power in the imaging lens group is six, the refractive index of the third lens is nd3, the thickness of the third lens on the optical axis is CT3, the incident pupil diameter of the imaging lens group is EPD, and the following conditions are satisfied: 2.64<(nd3*CT3) / EPD<4.55.

[0027] When the imaging lens group satisfies 2.64<(nd3*CT3) / EPD<4.55, the manufacturability of the imaging lens group can be improved while reducing the impact of temperature changes on imaging quality by properly selecting the third lens material, the third lens thickness and the entrance pupil diameter.

[0028] The Abbe coefficient of the third lens is vd3, the refractive index of the third lens is nd3, the focal length of the third lens is f3, and the following conditions are met: 0.82 (mm -1 )<vd3 / (nd3*f3)<2.81(mm -1 ), the imaging quality of the imaging lens group can be improved by selecting the material of the third lens and configuring the refractive power appropriately.

[0029] The Abbe coefficient of the third lens is vd3, the sum of the spacing distances of all adjacent lenses in the imaging lens group along the optical axis is ΣAT, the refractive index of the third lens is nd3, the focal length of the third lens is f3, and the following conditions are satisfied: 4.55<(vd3*ΣAT) / (nd3*f3)<18.52. By selecting the third lens material, the refractive power and the appropriate configuration of the lens spacing of the imaging lens group, the third lens has better formability to facilitate manufacturing and reduce production costs.

[0030] The combined focal length of the fourth lens, the fifth lens and the sixth lens is f456, the overall focal length of the imaging lens group is f, the entrance pupil diameter of the imaging lens group is EPD, and the following conditions are met: 0.81 (mm -1 )<f456 / (f*EPD)<1.31(mm -1 ), through the appropriate configuration of the refractive power and entrance pupil diameter of the imaging lens group, it is beneficial to improve the confocality of the imaging lens group in the visible light band and the infrared light band.

[0031] The sum of the axial distances between all adjacent lenses in the imaging lens group is ΣAT. The thickness of the second lens on the optical axis is CT2, and the thickness of the third lens on the optical axis is CT3, and the following conditions are satisfied: 15.68 (mm) < ΣAT * CT3 / (CT2) < 43.12 (mm). Such an appropriate configuration of lens thickness and lens spacing helps to reduce the sensitivity of the imaging lens group and reduce the assembly tolerance.

[0032] 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 entrance pupil diameter of the imaging lens group is EPD, and the following conditions are satisfied: 1.04 (mm) < (R5 / R7) * EPD < 22.66 (mm). Such an appropriate configuration of the lens curvature and the entrance pupil diameter ratio effectively reduces the temperature drift phenomenon caused by temperature changes to ensure excellent imaging quality.

[0033] The distance from the object-side surface of the first lens to the imaging surface on the optical axis is TL, the axial distance between the second lens and the third lens is T23, and the axial distance between the fifth lens and the sixth lens is T56, and the following conditions are satisfied: 32.06 < TL / (T23 + T56) < 102.41. This makes the lens spacing configuration and the height of the imaging lens group more appropriate, thereby reducing the ghost reflection problem of the imaging lens group.

[0034] The focal length of the third lens is f3, 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: 0.33 (mm) < f3 * CT3 / R5 < 2.55 (mm). Such an appropriate configuration of the parameters of the third lens helps to improve the manufacturability of the imaging lens group and at the same time reduces the influence of temperature changes on the imaging quality.

[0035] The radius of curvature of the object-side surface of the fifth lens is R9, the focal length of the fourth lens is f4, and the focal length of the fifth lens is f5, and the following conditions are satisfied: -6.61 (mm -1 ) < R9 / (f4 * f5) < -0.25 (mm -1 ). Such an appropriate configuration of the refractive power and curvature of the lens is beneficial to improving the confocal property of the imaging lens group in the visible light band and the infrared light band.

[0036] The angle of the maximum viewing angle of the imaging lens group, the incident angle of the principal ray of the imaging lens group to the imaging surface is CRA, the radius of curvature of the object side surface of the fifth lens is R9, the maximum viewing angle of the imaging lens group is FOV, and the following conditions are satisfied: 1.12 (mm) < CRA*R9 / FOV < 30.28 (mm), thereby making the configuration of the principal ray incident angle and the lens curvature of the imaging lens group more appropriate, so that the imaging lens group has an ultra-wide angle and is conducive to correcting the aberration of the imaging lens group.

[0037] The angle of the maximum viewing angle of the imaging lens group at which the principal ray is incident on the imaging surface is CRA, the radius of curvature of the object side surface of the third lens is R5, the maximum imaging height of the imaging lens group is IMH, and the following conditions are satisfied: 0.47<tan(CRA)*R5 / IMH<6.35, thereby making the configuration of the principal ray incident angle, lens curvature and imaging height of the imaging lens group more appropriate, so as to achieve the best imaging quality.

[0038] The angle of the maximum viewing angle of the imaging lens group at which the principal ray enters the imaging plane is CRA, the radius of curvature of the object side surface of the fourth lens is R7, the radius of curvature of the object side surface of the fifth lens is R9, the distance from the image side surface of the sixth lens to the imaging plane on the optical axis is BFL, the overall focal length of the imaging lens group is f, and the following conditions are met: 0.02 (degrees / mm 2 )<(CRA*R7) / (R9*BFL*f)<1.79(degrees / mm 2 ), thereby achieving an optimal configuration of the principal ray incident angle, lens curvature and refractive power, and back focus space, so that the imaging lens group has a better relative illumination and meets the back focus requirements of the imaging lens group.

[0039] The object side surface curvature radius of the first lens is R1, the image side surface curvature radius of the second lens is R4, the distance from the image side surface of the sixth lens to the imaging plane on the optical axis is BFL, and the following conditions are satisfied: -106.64 (mm) < (R1 / R4) * BFL < -29.68 (mm), whereby the lens curvature and back focus space are properly configured to meet the back focus requirements of the imaging lens group and improve the imaging quality of the imaging lens group.

[0040] The maximum viewing angle of the imaging lens group is FOV, the object side surface radius of curvature of the first lens is R1, the object side surface radius of curvature of the third lens is R5, and the following conditions are met:

[0041] -258.69 (degrees) < (FOV / R1) * R5 < -8.76 (degrees), whereby the maximum viewing angle and lens curvature are properly configured to effectively enhance its wide-angle characteristics and provide a larger viewing angle, which is beneficial to improving the imaging quality of the imaging lens group.

[0042] The radius of curvature of the object-side surface of the third lens is R5, and the radius of curvature of the image-side surface of the third lens is R6, and the following condition is satisfied: -9.85 < R5 / R6 < -0.67. Thereby, the appropriate configuration of the curvature of the third lens helps to improve the manufacturability of the third lens.

[0043] The focal length of the second lens is f2, and the focal length of the third lens is f3, and the following condition is satisfied: -1.96 < f2 / f3 < -0.87. Thereby, the refractive power of the lenses of the imaging lens group has a better configuration, and at the same time, the influence of temperature change on the imaging quality is reduced.

[0044] The thickness of the second lens on the optical axis is CT2, the thickness of the fourth lens on the optical axis is CT4, the thickness of the fifth lens on the optical axis is CT5, the thickness of the sixth lens on the optical axis is CT6, and the entrance pupil diameter of the imaging lens group is EPD, and the following condition is satisfied: 5.40 (mm) < (CT4 + CT5 + CT6) * EPD / CT2 < 14.83 (mm). Thereby, the lens thickness and the entrance pupil diameter have a better configuration to reduce the assembly tolerance and improve the imaging quality of the imaging lens group. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1A It is a schematic diagram of an imaging lens group according to a first embodiment of the present invention.

[0046] Figure 1B From left to right are the field curvature and distortion curves of the imaging lens group of the first embodiment in sequence.

[0047] Figure 2A It is a schematic diagram of an imaging lens group according to a second embodiment of the present invention.

[0048] Figure 2B From left to right are the field curvature and distortion curves of the imaging lens group of the second embodiment in sequence.

[0049] Figure 3A It is a schematic diagram of an imaging lens group according to a third embodiment of the present invention.

[0050] Figure 3B From left to right are the field curvature and distortion curves of the imaging lens group of the third embodiment in sequence.

[0051] Figure 4A It is a schematic diagram of an imaging lens group according to a fourth embodiment of the present invention.

[0052] Figure 4B From left to right are the field curvature and distortion curves of the imaging lens group of the fourth embodiment in sequence.

[0053] Figure 5A It is a schematic diagram of an imaging lens group according to a fifth embodiment of the present invention.

[0054] Figure 5B From left to right are the field curvature and distortion curves of the imaging lens assembly of the fifth embodiment.

[0055] Figure 6 Schematic diagram of a camera module according to a sixth embodiment of the present invention.

[0056] In the figure:

[0057] 100, 200, 300, 400, 500: light bar

[0058] 110, 210, 310, 410, 510: first lens

[0059] 111, 211, 311, 411, 511: object side surface

[0060] 112, 212, 312, 412, 512: Image side surface

[0061] 120, 220, 320, 420, 520: Second lens

[0062] 121, 221, 321, 421, 521: object side surface

[0063] 122, 222, 322, 422, 522: Image side surface

[0064] 130, 230, 330, 430, 530: The third lens

[0065] 131, 231, 331, 431, 531: object side surface

[0066] 132, 232, 332, 432, 532: Image side surface

[0067] 140, 240, 340, 440, 540: fourth lens

[0068] 141, 241, 341, 441, 541: object side surface

[0069] 142, 242, 342, 442, 542: Image side surface

[0070] 150, 250, 350, 450, 550: Fifth lens

[0071] 151, 251, 351, 451, 551: object side surface

[0072] 152, 252, 352, 452, 552: Image side surface

[0073] 160, 260, 360, 460, 560: Sixth lens

[0074] 161, 261, 361, 461, 561: Object side surface

[0075] 162, 262, 362, 462, 562: Image side surface

[0076] 171, 271, 371, 471, 571: filter element

[0077] 172, 272, 372, 472, 572: protection element

[0078] 180, 280, 380, 480, 580: imaging surface

[0079] 190, 290, 390, 490, 590: optical axis

[0080] 1000: Lens tube

[0081] 2000: Image Sensors

[0082] 3000: Imaging lens group

[0083] 4000: Camera module

[0084] f: Overall focal length of the imaging lens group

[0085] Fno: aperture value of the imaging lens group

[0086] FOV: The maximum viewing angle of the imaging lens group

[0087] HFOV: half of the maximum viewing angle of the imaging lens group

[0088] IMH: Maximum imaging height of the imaging lens group

[0089] f2: focal length of the second lens

[0090] f3: focal length of the third lens

[0091] f4: focal length of the fourth lens

[0092] f5: focal length of the fifth lens

[0093] R1: The radius of curvature of the object side surface of the first lens

[0094] R4: The curvature radius of the image side surface of the second lens

[0095] R5: The radius of curvature of the object side surface of the third lens

[0096] R6: The radius of curvature of the image side surface of the third lens

[0097] R7: The radius of curvature of the object side surface of the fourth lens

[0098] R9: The radius of curvature of the object side surface of the fifth lens

[0099] CT2: The thickness of the second lens on the optical axis

[0100] CT4: Thickness of the fourth lens on the optical axis

[0101] CT5: Thickness of the fifth lens on the optical axis

[0102] CT6: Thickness of the sixth lens on the optical axis

[0103] BFL: The distance from the image side surface of the sixth lens to the imaging plane on the optical axis

[0104] TL: The distance from the object side surface of the first lens to the imaging surface on the optical axis

[0105] EPD: Entrance pupil diameter of the imaging lens group

[0106] CRA: The maximum viewing angle of the imaging lens group, the angle at which the principal ray is incident on the imaging surface

[0107] nd3: refractive index of the third lens

[0108] CT3: Thickness of the third lens on the optical axis

[0109] vd3: Abbe coefficient of the third lens

[0110] ΣAT: The sum of the distances between all adjacent lenses in the imaging lens group along the optical axis

[0111] f456: The combined focal length of the fourth lens, the fifth lens, and the sixth lens

[0112] T23: The distance between the second lens and the third lens on the optical axis

[0113] T56: The distance between the fifth lens and the sixth lens on the optical axis. DETAILED DESCRIPTION

[0114] In order to enable the technical personnel in the relevant technical field to understand the content of the present invention and to implement the content of the present invention, the following is an appropriate embodiment with illustrations for explanation. The equivalent replacement and modification based on the content of the present invention are included in the scope of rights of the present invention. In addition, it is stated that the illustrations attached to the present invention are not depicted according to the actual size. Although the present invention provides embodiments of specific parameters, it should be understood that the parameters do not need to be completely equal to the corresponding values. Within the acceptable error range, they are approximate to the corresponding parameters. The following implementation methods will further explain the technical content of the present invention in detail, but the disclosed content is not used to limit the scope of rights of the present invention.

[0115] <First Embodiment>

[0116] Please refer to Figure 1A and Figure 1B ,in, Figure 1A is a schematic diagram of an imaging lens assembly according to a first embodiment of the present invention, Figure 1B From left to right are the field curvature and distortion curves of the imaging lens assembly of the first embodiment. Figure 1A It can be seen that the imaging lens group includes, from the object side to the image side, a first lens 110, a second lens 120, a third lens 130, a light barrier 100, a fourth lens 140, a fifth lens 150, a sixth lens 160, a filter element 171, a protection element 172 and an imaging surface 180; wherein the imaging lens group includes six lenses with refractive power, but is not limited thereto.

[0117] The first lens 110 has negative refractive power and is made of plastic. Its object-side surface 111 is concave 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 surfaces.

[0118] The second lens 120 has negative refractive power and is made of plastic. Its object-side surface 121 is convex near the optical axis 190 , and its image-side surface 122 is concave near the optical axis 190 . Both the object-side surface 121 and the image-side surface 122 are aspherical.

[0119] The third lens 130 has positive refractive power and is made of glass. 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 spherical.

[0120] The fourth lens 140 has positive refractive power and is made of plastic. Its object-side surface 141 is convex 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 convex 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 surfaces.

[0122] The sixth lens 160 has positive refractive power and is made of plastic. Its object-side surface 161 is convex near the optical axis 190 , and its image-side surface 162 is convex near the optical axis 190 . Both the object-side surface 161 and the image-side surface 162 are aspherical surfaces.

[0123] The filter element 171 is made of glass and is disposed between the sixth lens 160 and the imaging plane 180 without affecting the focal length of the imaging lens group. In this embodiment, the filter element 171 can be a filter that allows the visible light band to pass through, a filter that allows the infrared light band to pass through, or a filter that allows both the visible light and infrared light bands to pass through.

[0124] The protection element 172 is made of glass and is disposed between the filter element 171 and the imaging surface 180 without affecting the focal length of the imaging lens assembly.

[0125] The curve equations of the aspheric surfaces of the above lenses are expressed as follows:

[0126]

[0127] Wherein, z is the position value at a height of h along the optical axis 190 with the surface vertex as a reference; c is the curvature of the lens surface close to the optical axis 190, and is the inverse of the radius of curvature (R) (c=1 / R), R is the radius of curvature of the lens surface close to the optical axis 190, h is the vertical distance between the lens surface and the optical axis 190, k is the conic constant, and Ai is the i-th order aspheric coefficient.

[0128] 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 viewing angle of the imaging lens group is FOV, whose values ​​are as follows: f=3.17 (mm); Fno=1.65; and FOV=142.00 (degrees).

[0129] In the imaging lens set of the first embodiment, the refractive index of the third lens is nd3, the thickness of the third lens on the optical axis is CT3, the entrance pupil diameter of the imaging lens set is EPD, and the following condition is satisfied: (nd3*CT3) / EPD=3.31.

[0130] In the imaging lens set of the first embodiment, the Abbe coefficient of the third lens is vd3, the refractive index of the third lens is nd3, the focal length of the third lens is f3, and the following conditions are satisfied: vd3 / (nd3*f3)=2.35 (mm -1 ).

[0131] In the imaging lens group of the first embodiment, the Abbe coefficient of the third lens is vd3, the sum of the spacing distances of all adjacent lenses in the imaging lens group along the optical axis is ΣAT, the refractive index of the third lens is nd3, the focal length of the third lens is f3, and the following conditions are satisfied: (vd3*ΣAT) / (nd3*f3)=15.44.

[0132] In the imaging lens set of the first embodiment, the combined focal length of the fourth lens, the fifth lens and the sixth lens is f456, the overall focal length of the imaging lens set is f, the entrance pupil diameter of the imaging lens set is EPD, and the following conditions are satisfied: f456 / (f*EPD)=1.09 (mm -1 ).

[0133] In the imaging lens group of the first embodiment, the sum of the spacing distances between all adjacent lenses in the imaging lens group along the optical axis is ΣAT, the thickness of the second lens on the optical axis is CT2, the thickness of the third lens on the optical axis is CT3, and the following condition is satisfied: ΣAT*CT3 / (CT2)=35.94 (mm).

[0134] In the imaging lens group of the first embodiment, the object side surface radius of curvature of the third lens is R5, the object side surface radius of curvature of the fourth lens is R7, the incident pupil diameter of the imaging lens group is EPD, and the following condition is satisfied: (R5 / R7)*EPD=3.23 (mm).

[0135] In the imaging lens group of the first embodiment, the distance from the object side surface of the first lens to the imaging plane on the optical axis is TL, the spacing distance between the second lens and the third lens on the optical axis is T23, and the spacing distance between the fifth lens and the sixth lens on the optical axis is T56, and the following condition is satisfied: TL / (T23+T56)=40.07.

[0136] In the imaging lens group of the first embodiment, the focal length of the third lens is f3, the thickness of the third lens on the optical axis is CT3, the object side surface curvature radius of the third lens is R5, and the following condition is satisfied: f3*CT3 / R5=1.76 (mm).

[0137] In the imaging lens set of the first embodiment, the curvature radius of the object side surface of the fifth lens is R9, the focal length of the fourth lens is f4, the focal length of the fifth lens is f5, and the following conditions are satisfied: -R9 / (f4*f5)=-0.32 (mm -1 ).

[0138] In the imaging lens group of the first embodiment, the angle of the maximum viewing angle of the imaging lens group at which the principal ray is incident on the imaging plane is CRA, the radius of curvature of the object side surface of the fifth lens is R9, the maximum viewing angle of the imaging lens group is FOV, and the following condition is satisfied: CRA*R9 / FOV=1.40 (mm).

[0139] In the imaging lens group of the first embodiment, the angle of the maximum viewing angle of the imaging lens group at which the principal ray is incident on the imaging plane is CRA, the radius of curvature of the object side surface of the third lens is R5, the maximum imaging height of the imaging lens group is IMH, and the following condition is satisfied: tan(CRA)*R5 / IMH=0.74.

[0140] In the imaging lens set of the first embodiment, the angle of the maximum viewing angle of the imaging lens set at which the principal ray enters the imaging plane is CRA, the radius of curvature of the object side surface of the fourth lens is R7, the radius of curvature of the object side surface of the fifth lens is R9, the distance from the image side surface of the sixth lens to the imaging plane on the optical axis is BFL, the overall focal length of the imaging lens set is f, and the following conditions are satisfied: (CRA*R7) / (R9*BFL*f)=0.31 (degrees / mm) 2 ).

[0141] In the imaging lens group of the first embodiment, the object side surface radius of the first lens is R1, the image side surface radius of the second lens is R4, and the distance from the image side surface of the sixth lens to the imaging plane on the optical axis is BFL, and the following condition is satisfied: (R1 / R4)*BFL=-82.86 (mm).

[0142] In the imaging lens group of the first embodiment, the maximum viewing angle of the imaging lens group is FOV, the object side surface radius of curvature of the first lens is R1, the object side surface radius of curvature of the third lens is R5, and the following condition is satisfied: (FOV / R1)*R5=-30.03 (degrees).

[0143] In the imaging lens assembly of the first embodiment, the object-side surface curvature radius of the third lens is R5, the image-side surface curvature radius of the third lens is R6, and the following condition is satisfied: R5 / R6=-1.52.

[0144] In the imaging lens assembly of the first embodiment, the focal length of the second lens is f2, the focal length of the third lens is f3, and the following condition is satisfied: f2 / f3=-1.27.

[0145] In the imaging lens group of the first embodiment, the thickness of the second lens on the optical axis is CT2, the thickness of the fourth lens on the optical axis is CT4, the thickness of the fifth lens on the optical axis is CT5, the thickness of the sixth lens on the optical axis is CT6, the incident pupil diameter of the imaging lens group is EPD, and satisfies the following condition: (CT4+CT5+CT6)*EPD / CT2=12.36 (mm).

[0146] Please refer to Table 1 and Table 2 below.

[0147]

[0148]

[0149]

[0150] Table 1 Figure 1A The first embodiment is a detailed structural data, wherein the unit of the curvature radius, thickness, gap and focal length is mm, and surfaces 0-16 represent the surfaces from the object side to the image side in sequence, surface 7 is the gap between the light bar 100 and the object side surface 141 of the fourth lens 140 on the optical axis 190, and the light bar 100 is closer to the object side than the object side surface 141 of the fourth lens 140, so it is represented by a positive value, on the contrary, if the object side surface 141 of the fourth lens 140 is closer to the object side than the light bar 100, it is represented by a negative value; surfaces 1, 3, 5, 8, 10, 12, 14, 16 are respectively the first lens 110, the second lens 120, the third lens 130, the fourth lens 140, the fifth lens 150, the sixth lens 160, the filter element 171, and the protection element 172. thickness on the optical axis 190; surfaces 2, 4, 6, 9, 11, 13, 15, and 17 are respectively a gap on the optical axis 190 between the first lens 110 and the second lens 120, a gap on the optical axis 190 between the second lens 120 and the third lens 130, a gap on the optical axis 190 between the third lens 130 and the light barrier 100, a gap on the optical axis 190 between the fourth lens 140 and the fifth lens 150, a gap on the optical axis 190 between the fifth lens 150 and the sixth lens 160, a gap on the optical axis 190 between the sixth lens 160 and the filter element 171, a gap on the optical axis 190 between the filter element 171 and the protective element 172, and a gap on the optical axis 190 between the protective element 172 and the imaging surface 180.

[0151] Table 2 is the aspheric surface data in the first embodiment, wherein k represents the cone coefficient in the aspheric curve equation, and A2, A4, A6, A8, A10, A12, A14, A16, A18, A20, A22 and A24 are high-order aspheric surface coefficients. In addition, the following tables of the embodiments correspond to the schematic diagrams and aberration curves of the embodiments, and the definitions of the data in the tables of the embodiments are the same as those in Table 1 and Table 2 of the first embodiment, and will not be repeated here.

[0152] <Second embodiment>

[0153] Please refer to Figure 2A and Figure 2B ,in, Figure 2A is a schematic diagram of an imaging lens assembly according to a second embodiment of the present invention, Figure 2B From left to right are the field curvature and distortion curves of the imaging lens assembly of the second embodiment. Figure 2AIt can be seen that the imaging lens group includes, from the object side to the image side, a first lens 210, a second lens 220, a third lens 230, a light barrier 200, a fourth lens 240, a fifth lens 250, a sixth lens 260, a filter element 271, a protection element 272 and an imaging surface 280; wherein the imaging lens group includes six lenses with refractive power, but the present invention is not limited thereto.

[0154] The first lens 210 has negative refractive power and is made of plastic. Its object-side surface 211 is concave 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.

[0155] 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.

[0156] The third lens 230 has positive refractive power and is made of glass. Its object-side surface 231 is convex near the optical axis 290 , and its image-side surface 232 is convex near the optical axis 290 . Both the object-side surface 231 and the image-side surface 232 are spherical.

[0157] The fourth lens 240 has positive refractive power and is made of plastic. Its object-side surface 241 is convex 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.

[0158] The fifth lens 250 has negative refractive power and is made of plastic. Its object-side surface 251 is convex 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 surfaces.

[0159] The sixth lens 260 has positive refractive power and is made of plastic. Its object-side surface 261 is convex near the optical axis 290 , and its image-side surface 262 is convex near the optical axis 290 . Both the object-side surface 261 and the image-side surface 262 are aspherical surfaces.

[0160] The filter element 271 is made of glass and is disposed between the sixth lens 260 and the imaging plane 280 without affecting the focal length of the imaging lens group. In this embodiment, the filter element 271 can be a filter that allows the visible light band to pass through, a filter that allows the infrared light band to pass through, or a filter that allows both the visible light and infrared light bands to pass through.

[0161] The protection element 272 is made of glass and is disposed between the filter element 271 and the imaging surface 280 without affecting the focal length of the imaging lens assembly.

[0162] Please refer to Table 3 and Table 4 below.

[0163]

[0164]

[0165] In the second embodiment, the curve equation of the aspheric surface is expressed in the same form as in the first embodiment. In addition, the definitions of the parameters in the following table are the same as those in the first embodiment and are not repeated here.

[0166] The following data can be calculated by combining Table 3 and Table 4:

[0167]

[0168]

[0169] <Third embodiment>

[0170] Please refer to Figure 3A and Figure 3B ,in, Figure 3A is a schematic diagram of an imaging lens assembly according to a third embodiment of the present invention, Figure 3B From left to right are the field curvature and distortion curves of the imaging lens assembly of the third embodiment. Figure 3A It can be seen that the imaging lens group includes, from the object side to the image side, a first lens 310, a second lens 320, a third lens 330, a fourth lens 340, a light barrier 300, a fifth lens 350, a sixth lens 360, a filter element 371, a protection element 372 and an imaging surface 380; wherein the imaging lens group has six lenses with refractive power, but is not limited thereto.

[0171] The first lens 310 has negative refractive power and is made of plastic. Its object-side surface 311 is concave 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.

[0172] The second lens 320 has negative refractive power and is made of plastic. Its object-side surface 321 is convex near the optical axis 390 , and its image-side surface 322 is concave near the optical axis 390 . Both the object-side surface 321 and the image-side surface 322 are aspherical.

[0173] 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.

[0174] The fourth lens 340 has positive refractive power and is made of glass. Its object-side surface 341 is convex 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 spherical.

[0175] The fifth lens 350 has negative refractive power and is made of plastic. Its object-side surface 351 is convex 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.

[0176] The sixth lens 360 has positive refractive power and is made of plastic. Its object-side surface 361 is convex near the optical axis 390 , and its image-side surface 362 is convex near the optical axis 390 . Both the object-side surface 361 and the image-side surface 362 are aspherical.

[0177] The filter element 371 is made of glass and is disposed between the sixth lens 360 and the imaging plane 380 without affecting the focal length of the imaging lens group. In this embodiment, the filter element 371 can be a filter that allows the visible light band to pass through, a filter that allows the infrared light band to pass through, or a filter that allows both the visible light and infrared light bands to pass through.

[0178] The protection element 372 is made of glass and is disposed between the filter element 371 and the imaging surface 380 without affecting the focal length of the imaging lens assembly.

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

[0180]

[0181]

[0182]

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

[0184] The following data can be calculated by combining Table 5 and Table 6:

[0185]

[0186] <Fourth embodiment>

[0187] Please refer to Figure 4A and Figure 4B ,in, Figure 4A is a schematic diagram of an imaging lens assembly according to a fourth embodiment of the present invention, Figure 4B From left to right are the field curvature and distortion curves of the imaging lens assembly of the fourth embodiment. Figure 4A It can be seen that the imaging lens group includes, from the object side to the image side, a first lens 410, a second lens 420, a third lens 430, a fourth lens 440, a light barrier 400, a fifth lens 450, a sixth lens 460, a filter element 471, a protection element 472 and an imaging surface 480; wherein the imaging lens group has six lenses with refractive power, but is not limited to this.

[0188] The first lens 410 has negative refractive power and is made of plastic. Its object-side surface 411 is concave 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.

[0189] The second lens 420 has negative refractive power and is made of plastic. Its object-side surface 421 is convex near the optical axis 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.

[0190] The third lens 430 has positive refractive power and is made of plastic. Its object-side surface 431 is convex near the optical axis 490 , and its image-side surface 432 is convex near the optical axis 490 . Both the object-side surface 431 and the image-side surface 432 are aspherical.

[0191] The fourth lens 440 has positive refractive power and is made of glass. Its object-side surface 441 is convex 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 spherical.

[0192] The fifth lens element 450 has negative refractive power and is made of plastic. Its object-side surface 451 is convex 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.

[0193] The sixth lens 460 has positive refractive power and is made of plastic. Its object-side surface 461 is convex near the optical axis 490 , and its image-side surface 462 is convex near the optical axis 490 . Both the object-side surface 461 and the image-side surface 462 are aspherical.

[0194] The filter element 471 is made of glass, and is disposed between the sixth lens 460 and the imaging plane 480 without affecting the focal length of the imaging lens group. In this embodiment, the filter element 471 can be a filter that allows the visible light band to pass through, a filter that allows the infrared light band to pass through, or a filter that allows both the visible light and infrared light bands to pass through.

[0195] The protection element 472 is made of glass and is disposed between the filter element 471 and the imaging surface 480 without affecting the focal length of the imaging lens group.

[0196] Please refer to Table 7 and Table 8 below.

[0197]

[0198]

[0199]

[0200]

[0201] In the fourth embodiment, the curve equation of the aspheric surface is expressed in the same form as in the first embodiment. In addition, the definitions of the parameters in the following table are the same as those in the first embodiment and are not repeated here.

[0202] The following data can be calculated by combining Table 7 and Table 8:

[0203]

[0204] <Fifth embodiment>

[0205] Please refer to Figure 5A and Figure 5B ,in, Figure 5A is a schematic diagram of an imaging lens assembly according to a fifth embodiment of the present invention, Figure 5B From left to right are the field curvature and distortion curves of the imaging lens assembly of the fifth embodiment. Figure 5A It can be seen that the imaging lens group includes, from the object side to the image side, a first lens 510, a second lens 520, a third lens 530, a light barrier 500, a fourth lens 540, a fifth lens 550, a sixth lens 560, a filter element 571, a protection element 572 and an imaging surface 580; wherein the imaging lens group includes six lenses with refractive power, but is not limited thereto.

[0206] The first lens 510 has negative refractive power and is made of plastic. Its object-side surface 511 is concave 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.

[0207] 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.

[0208] The third lens 530 has positive refractive power and is made of glass. Its object-side surface 531 is convex near the optical axis 590 , and its image-side surface 532 is convex near the optical axis 590 . Both the object-side surface 531 and the image-side surface 532 are spherical.

[0209] The fourth lens 540 has positive refractive power and is made of plastic. Its object-side surface 541 is convex 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.

[0210] The fifth lens 550 has negative refractive power and is made of plastic. Its object-side surface 551 is convex 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.

[0211] The sixth lens 560 has positive refractive power and is made of plastic. Its object-side surface 561 is convex near the optical axis 590 , and its image-side surface 562 is convex near the optical axis 590 . Both the object-side surface 561 and the image-side surface 562 are aspherical.

[0212] The filter element 571 is made of glass and is disposed between the sixth lens 560 and the imaging plane 580 without affecting the focal length of the imaging lens group. In this embodiment, the filter element 571 can be a filter that allows the visible light band to pass through, a filter that allows the infrared light band to pass through, or a filter that allows both the visible light and infrared light bands to pass through.

[0213] The protection element 572 is made of glass and is disposed between the filter element 571 and the imaging surface 580 without affecting the focal length of the imaging lens group.

[0214] Please refer to Table 9 and Table 10 below.

[0215]

[0216]

[0217]

[0218] In the fifth embodiment, the curve equation of the aspheric surface is expressed in the same form as in the first embodiment. In addition, the definitions of the parameters in the following table are the same as those in the first embodiment and are not repeated here.

[0219] The following data can be calculated by combining Table 9 and Table 10:

[0220]

[0221]

[0222] <Sixth embodiment>

[0223] Please refer to Figure 6 , Figure 6 The camera module of the sixth embodiment of the present invention comprises 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-mentioned embodiments, the imaging lens group 3000 is arranged in the lens barrel 1000, the image sensor 2000 is arranged on the imaging surface of the imaging lens group, and is an electronic photosensitive element (such as CMOS, CCD) with good sensitivity and low noise, so as to truly present the imaging quality of the imaging lens group.

[0224] In the aforementioned embodiments, a person having ordinary knowledge in the relevant field should be able to understand that in the imaging lens group provided by the present invention, the lens can be made of glass or plastic. The glass lens can increase the freedom of the refractive power configuration of the imaging lens group, and the glass lens can be made by related technologies such as grinding or molding. The plastic lens can reduce the production cost.

[0225] In the imaging lens group provided by the present invention, with respect to the lens having refractive power, if the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at the near optical axis; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at the near optical axis.

[0226] The imaging lens assembly provided by the present invention can be applied to harsh outdoor environments, optical systems that require wide angles and high imaging quality and take into account both visible light and infrared light bands, and can be widely used in electronic imaging systems in Internet of Things (IOT) devices, but is not limited thereto.

Claims

1. An imaging lens assembly, characterized in that: It includes a light barrier and includes, from the object side to the image side, the following: A first lens having negative refractive power, wherein the object side surface of the first lens is concave near the optical axis; a second lens having negative refractive power; a third lens having positive refractive power; a fourth lens element having positive refractive power; a fifth lens element having negative refractive power; and a sixth lens element having positive refractive power; The total number of lenses with refractive power in the imaging lens group is six, the refractive index of the third lens is nd3, the thickness of the third lens on the optical axis is CT3, the entrance pupil diameter of the imaging lens group is EPD, and the following conditions are met: 2.64< (nd3*CT3) / EPD<4.

55.

2. The imaging lens assembly according to claim 1, characterized in that: The Abbe coefficient of the third lens is vd3, the refractive index of the third lens is nd3, the focal length of the third lens is f3, and the following conditions are met: 0.82 mm -1 <vd3 / (nd3*f3)<2.81mm -1 .

3. The imaging lens assembly according to claim 1, wherein: The Abbe coefficient of the third lens is vd3, the sum of the spacing distances of all adjacent lenses in the imaging lens group along the optical axis is ΣAT, the refractive index of the third lens is nd3, the focal length of the third lens is f3, and the following conditions are satisfied: 4.55<(vd3*ΣAT) / (nd3*f3)<18.

52.

4. The imaging lens assembly according to claim 1, wherein: The combined focal length of the fourth lens, the fifth lens and the sixth lens is f456, the overall focal length of the imaging lens group is f, the entrance pupil diameter of the imaging lens group is EPD, and the following conditions are met: 0.81 mm -1 <f456 / (f*EPD)<1.31mm -1 .

5. The imaging lens assembly according to claim 1, wherein: The sum of the spacing distances of all adjacent lenses in the imaging lens group along the optical axis is ΣAT, the thickness of the second lens on the optical axis is CT2, the thickness of the third lens on the optical axis is CT3, and the following conditions are satisfied: 15.68mm<ΣAT*CT3 / (CT2)<43.12mm.

6. The imaging lens assembly according to claim 1, wherein: The object side surface curvature radius of the third lens is R5, the object side surface curvature radius of the fourth lens is R7, the incident pupil diameter of the imaging lens group is EPD, and the following conditions are satisfied: 1.04 mm<(R5 / R7)*EPD<22.66 mm.

7. The imaging lens assembly according to claim 1, wherein: The distance between the object side surface of the first lens and the imaging plane on the optical axis is TL, the distance between the second lens and the third lens on the optical axis is T23, the distance between the fifth lens and the sixth lens on the optical axis is T56, and the following condition is satisfied: 32.06<TL / (T23+T56)<102.

41.

8. The imaging lens assembly according to claim 1, wherein: The focal length of the third lens is f3, the thickness of the third lens on the optical axis is CT3, the object side surface curvature radius of the third lens is R5, and the following conditions are met: 0.33 mm < f3*CT3 / R5<2.55mm.

9. The imaging lens assembly according to claim 1, wherein: The radius of curvature of the object-side surface of the fifth lens is R9, the focal length of the fourth lens is f4, and the focal length of the fifth lens is f5, and the following condition is satisfied: -6.61 mm -1 <R9 / (f4*f5) < -0.25 mm -1 .

10. The imaging lens assembly according to claim 1, wherein: The angle of the maximum viewing angle of the imaging lens group at which the principal ray is incident on the imaging plane is CRA, the radius of curvature of the object side surface of the fifth lens is R9, the maximum viewing angle of the imaging lens group is FOV, and the following conditions are met: 1.12 mm < CRA*R9 / FOV < 30.28 mm.

11. The imaging lens assembly according to claim 1, wherein: The angle of the maximum viewing angle of the imaging lens group at which the principal ray is incident on the imaging plane is CRA, the radius of curvature of the object side surface of the third lens is R5, the maximum imaging height of the imaging lens group is IMH, and the following conditions are satisfied: 0.47<tan(CRA)*R5 / IMH<6.

35.

12. The imaging lens assembly according to claim 1, wherein: The angle of the maximum viewing angle of the imaging lens group at which the principal ray enters the imaging surface is CRA, the radius of curvature of the object side surface of the fourth lens is R7, the radius of curvature of the object side surface of the fifth lens is R9, the distance from the image side surface of the sixth lens to the imaging surface on the optical axis is BFL, the overall focal length of the imaging lens group is f, and the following conditions are met: 0.02 degrees / mm 2 <(CRA*R7) / (R9*BFL*f)<1.79 degrees / mm 2 .

13. The imaging lens assembly according to claim 1, wherein: The object side surface curvature radius of the first lens is R1, the image side surface curvature radius of the second lens is R4, the distance from the image side surface of the sixth lens to the imaging plane on the optical axis is BFL, and the following conditions are met: -106.64mm<(R1 / R4)*BFL<-29.68mm.

14. The imaging lens assembly according to claim 1, wherein: The maximum viewing angle of the imaging lens group is FOV, the object side surface radius of curvature of the first lens is R1, the object side surface radius of curvature of the third lens is R5, and the following conditions are satisfied: -258.69 degrees < (FOV / R1)*R5 <-8.76 degrees.

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

Images