Imaging lens group and camera module

Abstract

The invention discloses an imaging lens group and a camera module. The imaging lens group sequentially comprises a first lens, a second lens, a third lens and a fourth lens from an object side to an image side, a second lens element; a third lens element; and a fourth lens element. Wherein the distance from the object side surface of the first lens to the imaging surface on the optical axis is TL, half of the maximum visual angle of the imaging lens group is HFOV, the maximum optical effective radius of the image side surface of the fourth lens is CA8, the maximum imaging height of the imaging lens group is IMH, and the following conditions are satisfied: 32.46 lt; tL * HFOV / (CA8 * IMH) lt; 54.39, 54.9). Therefore, not only can the manufacturing and assembling sensitivity of the imaging lens group be ensured, but also the overall imaging quality can be ensured, and stable and efficient mass production can be realized.

Description

Technical Field

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

[0002] In recent years, four-piece small lenses mounted on portable electronic devices such as mobile phones, tablet computers, and other wearable electronic devices have become the market mainstream. However, when these small lenses need to achieve a large aperture and a large viewing angle, there are generally sensitivity problems in manufacturing and assembly, which increases the difficulty and cost of mass production. On the other hand, in order to cope with the manufacturing sensitivity, some manufacturers have to sacrifice the peripheral imaging quality, resulting in blurred or distorted peripheral images.

[0003] The deficiencies in these prior arts are mainly reflected in two aspects. First, the improvement of manufacturing and assembly sensitivity makes it more difficult to achieve stable and efficient mass production, especially when pursuing a large aperture and a large viewing angle. Second, in order to overcome the manufacturing sensitivity problem, manufacturers have to make compromises in the peripheral imaging quality, thereby affecting the overall imaging quality. Summary of the Invention

[0004] An object of the present invention is to solve the above-mentioned problems of the prior art. To achieve the above object, the present invention provides an imaging lens group, which includes a diaphragm, and sequentially includes from the object side to the image side: a first lens having a positive refractive power; a second lens having a refractive power; a third lens having a positive refractive power; and a fourth lens having a negative refractive power.

[0005] Among them, the total number of lenses with refractive power in the imaging lens group is four. The distance from the object side surface of the first lens to the imaging surface on the optical axis is TL. The maximum viewing angle of the imaging lens group is FOV, and half of the maximum viewing angle of the imaging lens group is HFOV. The maximum optical effective radius of the object side surface of the first lens is CA1. The maximum optical effective radius of the image side surface of the third lens is CA6. The maximum optical effective radius of the image side surface of the fourth lens is CA8. The maximum imaging height of the imaging lens group is IMH. The thickness of the third lens on the optical axis is CT3. The peripheral thickness of the third lens is ET3. The distance from the image side surface of the fourth lens to the imaging surface on the optical axis is BFL. The absolute value of the displacement parallel to the optical axis from the intersection point of the object side surface of the first lens on the optical axis to the position of the maximum effective radius of the object side surface of the first lens is TDP1. The entrance pupil diameter of the imaging lens group is EPD. The Abbe number of the first lens is vd1. The Abbe number of the second lens is vd2. The Abbe number of the third lens is vd3. The angle at which the chief ray of the maximum viewing angle of the imaging lens group enters the imaging surface is CRA. The sum of the spacing distances between all adjacent lenses in the imaging lens group along the optical axis is ΣAT. The spacing distance between the first lens and the second lens on the optical axis is T12. The spacing distance between the third lens and the fourth lens on the optical axis is T34. 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 image side surface of the second lens is R4. The absolute value of the displacement parallel to the optical axis from the intersection point of the image side surface of the second lens on the optical axis to the position of the maximum effective radius of the image side surface of the second lens is TDP4. The absolute value of 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 TDP6. The focal length of the fourth lens is f4. The perpendicular distance from the critical point of the image side surface of the fourth lens to the optical axis is Y42C, and at least one of the following conditions is satisfied:

[0006] 32.46 (degree * mm -1 ) < TL * HFOV / (CA8 * IMH) < 54.39 (degree * mm -1 ) ;

[0007] 3.39 (mm) < TL * (CT3 / ET3) < 6.83 (mm) ;

[0008] 4.96 < BFL / TDP1 < 15.32 ;

[0009] 3.53 (mm -1 ) < IMH / (EPD * CA1) < 7.28 (mm -1 ) ;

[0010] 3.74 < (vd1 + vd3) / vd2 < 6.98;

[0011] 29.61 (degree * mm -1 ) < CRA / EPD < 54.20 (degree * mm -1 );

[0012] 0.99 < ∑AT / (T12 + T34) < 2.05;

[0013] -2354.04 (mm) < R2 * R4 / R1 < 265.45 (mm);

[0014] 2.99 < TDP6 / TDP4 < 80.51;

[0015] 2.69 < CA6 / T34 < 28.28;

[0016] 1.95 < TL / BFL < 3.43;

[0017] -5.90 < f4 / Y42C < -0.88;

[0018] 1.81 (mm -1 ) < IMH * Tan(HFOV) / (BFL * CA6) < 4.38 (mm -1 );

[0019] 0.84 < TL / (Tan(HFOV) * IMH) < 1.74;

[0020] 83.51 (degree) < FOV < 100.11 (degree);

[0021] 2.06 (mm) < TL < 2.68 (mm);

[0022] 32.48 (degree) < CRA < 39.74 (degree).

[0023] When the above imaging lens group satisfies 32.46 (degree * mm -1 ) < TL * HFOV / (CA8 * IMH) < 54.39 (degree * mm -1 ), a miniaturized imaging lens group is appropriately configured to achieve the effect of a large viewing angle.

[0024] When 3.39 (mm) < TL * (CT3 / ET3) < 6.83 (mm) is satisfied, the formability of the third lens can be effectively affected by appropriately configuring the ratio of the thickness of the third lens to the peripheral thickness.

[0025] When 4.96 < BFL / TDP1 < 15.32, through the appropriate configuration of the displacement amount parallel to the optical axis of the maximum effective radius position of the first lens object side surface and the optical back focal length, the incident angle of the image sensor can be satisfied and the miniaturization of the imaging lens group can be achieved.

[0026] When 3.53 (mm -1 ) < IMH / (EPD*CA1) < 7.28 (mm -1 ), through this, the imaging lens group has a larger light incident amount.

[0027] When 3.74 < (vd1 + vd3) / vd2 < 6.98, through the appropriate configuration of the lens materials, the chromatic aberration problem can be reduced accordingly.

[0028] When 29.61 (degree * mm -1 ) < CRA / EPD < 54.20 (degree * mm -1 ), through this, the imaging lens group has a larger light incident amount.

[0029] When 0.99 < ∑AT / (T12 + T34) < 2.05, through this, the air gap of the imaging lens group is adjusted to achieve the effects of high resolution and miniaturization.

[0030] When -2354.04 (mm) < R2*R4 / R1 < 265.45 (mm), through the appropriate distribution of the curvature of the lens, it is beneficial to correct the aberration of the imaging lens group to improve the imaging quality of the imaging lens group.

[0031] When 2.99 < TDP6 / TDP4 < 80.51, through the appropriate combination of the displacement amounts parallel to the optical axis of the maximum effective radius positions of the second lens and the third lens image side surfaces, the effect of miniaturizing the module is achieved.

[0032] When 2.69 < CA6 / T34 < 28.28, through the appropriate configuration, the optical distortion can be reduced to improve the imaging quality.

[0033] When 1.95 < TL / BFL < 3.43, through this, the configuration of the imaging lens group is more suitable, and thus a miniaturized imaging lens group is achieved.

[0034] When -5.90 < f4 / Y42C < -0.88, through this, a suitable incident angle of the image sensor is provided.

[0035] When 1.81 (mm -1 ) < IMH*Tan(HFOV) / (BFL*CA6) < 4.38 (mm -1) When this is the case, through appropriate configuration, a miniaturized imaging lens group can be achieved and the function of a large viewing angle can be satisfied.

[0036] When 0.84 < TL / (Tan(HFOV)*IMH) < 1.74 is satisfied, through appropriate configuration, a miniaturized imaging lens group can be achieved and the function of a large viewing angle can be satisfied.

[0037] When 83.51 (degrees) < FOV < 100.11 (degrees) is satisfied, the maximum viewing angle of the imaging lens group is made more appropriate, which is beneficial to improving the imaging quality.

[0038] When 2.06 (mm) < TL < 2.68 (mm) is satisfied, through appropriate configuration, it is beneficial to achieve a miniaturized imaging lens.

[0039] When 32.48 (degrees) < CRA < 39.74 (degrees) is satisfied, the function of a larger viewing angle can be achieved.

[0040] In addition, the present invention further provides an imaging module, which includes: a lens barrel; an imaging lens group disposed in the lens barrel; and an image sensor disposed on the imaging surface of the imaging lens group.

[0041] Wherein, the imaging lens group includes a diaphragm, and sequentially includes from the object side to the image side: a first lens having a positive refractive power; a second lens having a refractive power; a third lens having a positive refractive power; and a fourth lens having a negative refractive power.

[0042] Among them, the total number of lenses with refractive power in the imaging lens group is four. The distance from the object side surface of the first lens to the imaging surface on the optical axis is TL. The maximum viewing angle of the imaging lens group is FOV, and half of the maximum viewing angle of the imaging lens group is HFOV. The maximum optically effective radius of the object side surface of the first lens is CA1. The maximum optically effective radius of the image side surface of the third lens is CA6. The maximum optically effective radius of the image side surface of the fourth lens is CA8. The maximum imaging height of the imaging lens group is IMH. The thickness of the third lens on the optical axis is CT3. The peripheral thickness of the third lens (the distance parallel to the optical axis between the object side surface and the image side surface of the lens at the maximum effective diameter position) is ET3. The distance from the image side surface of the fourth lens to the imaging surface on the optical axis is BFL. The absolute value of the displacement amount parallel to the optical axis from the intersection point of the object side surface of the first lens on the optical axis to the maximum effective radius position of the object side surface of the first lens is TDP1. The entrance pupil diameter of the imaging lens group is EPD. The Abbe number of the first lens is vd1. The Abbe number of the second lens is vd2. The Abbe number of the third lens is vd3. The angle at which the chief ray of the maximum viewing angle of the imaging lens group enters the imaging surface is CRA. The sum of the interval distances along the optical axis of all adjacent lenses in the imaging lens group is ΣAT. The interval distance between the first lens and the second lens on the optical axis is T12. The interval distance between the third lens and the fourth lens on the optical axis is T34. 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 image side surface of the second lens is R4. The absolute value of the displacement amount parallel to the optical axis from the intersection point of the image side surface of the second lens on the optical axis to the maximum effective radius position of the image side surface of the second lens is TDP4. The absolute value of the displacement amount parallel to the optical axis from the intersection point of the image side surface of the fourth lens on the optical axis to the maximum effective radius position of the image side surface of the fourth lens is TDP6. The focal length of the fourth lens is f4. The perpendicular distance from the critical point of the image side surface of the fourth lens to the optical axis is Y42C, and at least one of the following conditions is satisfied:

[0043] 32.46 (degree * mm -1 ) < TL * HFOV / (CA8 * IMH) < 54.39 (degree * mm -1 );

[0044] 3.39 (mm) < TL * (CT3 / ET3) < 6.83 (mm);

[0045] 4.96 < BFL / TDP1 < 15.32;

[0046] 3.53 (mm -1 ) < IMH / (EPD * CA1) < 7.28 (mm -1 );

[0047] 3.74 < (vd1 + vd3) / vd2 < 6.98;

[0048] 29.61 (degree * mm -1 ) < CRA / EPD < 54.20 (degree * mm -1 );

[0049] 0.99 < ∑AT / (T12 + T34) < 2.05;

[0050] -2354.04 (mm) < R2 * R4 / R1 < 265.45 (mm);

[0051] 2.99 < TDP6 / TDP4 < 80.51;

[0052] 2.69 < CA6 / T34 < 28.28;

[0053] 1.95 < TL / BFL < 3.43;

[0054] -5.90 < f4 / Y42C < -0.88;

[0055] 1.81 (mm -1 ) < IMH * Tan(HFOV) / (BFL * CA6) < 4.38 (mm -1 );

[0056] 0.84 < TL / (Tan(HFOV) * IMH) < 1.74;

[0057] 83.51 (degree) < FOV < 100.11 (degree);

[0058] 2.06 (mm) < TL < 2.68 (mm);

[0059] 32.48 (degree) < CRA < 39.74 (degree).

[0060] When the above imaging lens group satisfies 32.46 (degree * mm -1 ) < TL * HFOV / (CA8 * IMH) < 54.39 (degree * mm -1 ), through appropriate configuration, a miniaturized imaging lens group can be achieved and the effect of a large viewing angle can be satisfied.

[0061] When 3.39 (mm) < TL * (CT3 / ET3) < 6.83 (mm) is satisfied, through appropriate configuration of the ratio of the thickness of the third lens to the peripheral thickness, the formability of the third lens can be effectively affected.

[0062] When 4.96 < BFL / TDP1 < 15.32 is satisfied, through the appropriate configuration of the displacement amount parallel to the optical axis of the maximum effective radius position of the first lens object side surface and the optical back focal length, the incident angle of the image sensor can be satisfied and the miniaturization of the imaging lens group can be achieved.

[0063] When 3.53 (mm -1 ) < IMH / (EPD*CA1) < 7.28 (mm -1 ) is satisfied, through this, the imaging lens group has a larger light incident amount.

[0064] When 3.74 < (vd1 + vd3) / vd2 < 6.98 is satisfied, through the appropriate configuration of the lens materials, the chromatic aberration problem can be reduced accordingly.

[0065] When 29.61 (degree * mm -1 ) < CRA / EPD < 54.20 (degree * mm -1 ) is satisfied, through this, the imaging lens group has a larger light incident amount.

[0066] When 0.99 < ∑AT / (T12 + T34) < 2.05 is satisfied, through this, the air gap of the imaging lens group is adjusted to achieve the effects of high resolution and miniaturization.

[0067] When -2354.04 (mm) < R2*R4 / R1 < 265.45 (mm) is satisfied, through the appropriate distribution of the curvatures of the lenses, it is beneficial to correct the aberration of the imaging lens group to improve the imaging quality of the imaging lens group.

[0068] When 2.99 < TDP6 / TDP4 < 80.51 is satisfied, through the appropriate combination of the displacement amounts parallel to the optical axis of the maximum effective radius positions of the second lens and the third lens image side surfaces, the effect of miniaturizing the module can be achieved.

[0069] When 2.69 < CA6 / T34 < 28.28 is satisfied, through the appropriate configuration, the optical distortion can be reduced to improve the imaging quality.

[0070] When 1.95 < TL / BFL < 3.43 is satisfied, through this, the configuration of the imaging lens group is more suitable, and thus a miniaturized imaging lens group is achieved.

[0071] When -5.90 < f4 / Y42C < -0.88 is satisfied, through this, a suitable incident angle for the image sensor is provided.

[0072] When 1.81 (mm -1 ) < IMH*Tan(HFOV) / (BFL*CA6) < 4.38 (mm -1) At this time, through appropriate configuration, a miniaturized imaging lens group can be achieved and the effect of a large viewing angle can be satisfied.

[0073] When 0.84 < TL / (Tan(HFOV)*IMH) < 1.74 is satisfied, through appropriate configuration, a miniaturized imaging lens group can be achieved and the effect of a large viewing angle can be satisfied.

[0074] When 83.51 (degrees) < FOV < 100.11 (degrees) is satisfied, the maximum viewing angle of the imaging lens group is made more appropriate, which is beneficial to improving the imaging quality.

[0075] When 2.06 (mm) < TL < 2.68 (mm) is satisfied, through appropriate configuration, it is beneficial to achieve a miniaturized imaging lens.

[0076] When 32.48 (degrees) < CRA < 39.74 (degrees) is satisfied, the effect of a larger viewing angle can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0077] Figure 1A It is a schematic diagram of the imaging lens group according to the first embodiment of the present invention.

[0078] Figure 1B From left to right, it is a graph of the field curvature and distortion of the imaging lens group according to the first embodiment in sequence.

[0079] Figure 2A It is a schematic diagram of the imaging lens group according to the second embodiment of the present invention.

[0080] Figure 2B From left to right, it is a graph of the field curvature and distortion of the imaging lens group according to the second embodiment in sequence.

[0081] Figure 3A It is a schematic diagram of the imaging lens group according to the third embodiment of the present invention.

[0082] Figure 3B From left to right, it is a graph of the field curvature and distortion of the imaging lens group according to the third embodiment in sequence.

[0083] Figure 4A It is a schematic diagram of the imaging lens group according to the fourth embodiment of the present invention.

[0084] Figure 4B From left to right, it is a graph of the field curvature and distortion of the imaging lens group according to the fourth embodiment in sequence.

[0085] Figure 5A It is a schematic diagram of the imaging lens group according to the fifth embodiment of the present invention.

[0086] Figure 5B From left to right, it is a graph of the field curvature and distortion of the imaging lens group according to the fifth embodiment in sequence.

[0087] Figure 6A Schematic diagram of the imaging lens group according to the sixth embodiment of the present invention.

[0088] Figure 6B Graphs of the field curvature and distortion of the imaging lens group according to the sixth embodiment, in sequence from left to right.

[0089] Figure 7A Schematic diagram of the imaging lens group according to the seventh embodiment of the present invention.

[0090] Figure 7B Graphs of the field curvature and distortion of the imaging lens group according to the seventh embodiment, in sequence from left to right.

[0091] Figure 8A Schematic diagram of the imaging lens group according to the eighth embodiment of the present invention.

[0092] Figure 8B Graphs of the field curvature and distortion of the imaging lens group according to the eighth embodiment, in sequence from left to right.

[0093] Figure 9 Schematic diagram of the imaging module according to the ninth embodiment of the present invention.

[0094] Symbol descriptions in the drawings:

[0095] 100, 200, 300, 400, 500, 600, 700, 800: Diaphragm;

[0096] 110, 210, 310, 410, 510, 610, 710, 810: First lens;

[0097] 111, 211, 311, 411, 511, 611, 711, 811: Object-side surface;

[0098] 112, 212, 312, 412, 512, 612, 712, 812: Image-side surface;

[0099] 120, 220, 320, 420, 520, 620, 720, 820: Second lens;

[0100] 121, 221, 321, 421, 521, 621, 721, 821: Object-side surface;

[0101] 122, 222, 322, 422, 522, 622, 722, 822: Image-side surface;

[0102] 130, 230, 330, 430, 530, 630, 730, 830: Third lens;

[0103] 131, 231, 331, 431, 531, 631, 731, 831: Object-side surface;

[0104] 132, 232, 332, 432, 532, 632, 732, 832: Image-side surface;

[0105] 140, 240, 340, 440, 540, 640, 740, 840: Fourth lens;

[0106] 141, 241, 341, 441, 541, 641, 741, 841: Object-side surface;

[0107] 142, 242, 342, 442, 542, 642, 742, 842: Image-side surface;

[0108] 170, 270, 370, 470, 570, 670, 770, 870: Infrared cut-off filter;

[0109] 180, 280, 380, 480, 580, 680, 780, 880: Imaging surface;

[0110] 190, 290, 390, 490, 590, 690, 790, 890: Optical axis;

[0111] 1000: Lens barrel;

[0112] 2000: Image sensor;

[0113] 3000: Imaging lens group;

[0114] 4000: Camera module. Detailed implementation manners

[0115] To enable those with ordinary knowledge in the relevant technical field to understand the content of the present invention and be able to implement it accordingly, the following will be described with appropriate embodiments in conjunction with the drawings. Equivalent replacements and modifications based on the content of the present invention are all included in the scope of the rights of the present invention. Additionally, it is declared that the drawings attached to the present invention are not drawn according to actual sizes. Although embodiments with specific parameters are provided in the present invention, it should be understood that the parameters do not need to be exactly equal to the corresponding values. Within an acceptable error range, they are approximated to the corresponding parameters. The following embodiments will further elaborate on the technical content of the present invention, but the disclosed content is not used to limit the scope of the rights of the present invention.

[0116] <First Embodiment>

[0117] Please refer to Figure 1A and Figure 1B , wherein, Figure 1ASchematic diagram of the imaging lens group according to the first embodiment of the present invention Figure 1B The graph of the field curvature and distortion of the imaging lens group according to the first embodiment from left to right in sequence. From Figure 1A It can be seen that the imaging lens group sequentially includes from the object side to the image side: a diaphragm 100, a first lens 110, a second lens 120, a third lens 130, a fourth lens 140, an infrared cut filter 170, and an imaging surface 180; among which there are four lenses with refractive power in the imaging lens group.

[0118] 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, and both the object-side surface 111 and the image-side surface 112 are aspherical surfaces.

[0119] 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, and both the object-side surface 121 and the image-side surface 122 are aspherical surfaces.

[0120] The third lens 130 has positive refractive power and is made of plastic. Its object-side surface 131 is concave near the optical axis 190, and its image-side surface 132 is convex near the optical axis 190, and both the object-side surface 131 and the image-side surface 132 are aspherical surfaces.

[0121] The fourth lens 140 has negative 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 concave near the optical axis 190, and both the object-side surface 141 and the image-side surface 142 are aspherical surfaces.

[0122] The infrared cut filter 170 is made of glass. It is disposed between the fourth lens 140 and the imaging surface 180 and does not affect the focal length of the imaging lens group; it can be understood that the infrared cut filter 170 component can also be formed on the lens surface, and the infrared cut filter 170 can also be made of other materials.

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

[0124]

[0125] Wherein, z is the position value with reference to the surface vertex at a position with a height of h along the optical axis 190 direction; 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 aspheric coefficient of the i-th order.

[0126] In the first embodiment, the overall focal length of the imaging lens group is f, the f-number of the imaging lens group is Fno, and the maximum viewing angle of the imaging lens group is FOV, and their values are as follows: f = 1.85 (mm); Fno = 2.05; IMH = 1.90 (mm); CRA = 34.63 (degrees); TDP1 = 0.13 (mm); TDP4 = 0.03 (mm); TDP6 = 0.07 (mm); CA1 = 0.45 (mm); CA6 = 0.87 (mm); CA8 = 1.35 (mm); Y42C = 0.69 (mm); ET3 = 0.15 (mm); and FOV = 90.02 (degrees).

[0127] 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, half of the maximum viewing angle of the imaging lens group is HFOV, the maximum optical effective radius of the image-side surface 142 of the fourth lens 140 is CA8, the maximum imaging height of the imaging lens group is IMH, and the following condition is satisfied: TL * HFOV / (CA8 * IMH) = 41.92 (degree * mm -1 )

[0128] In the imaging lens group of the first embodiment, the thickness of the third lens 130 on the optical axis 190 is CT3, and the peripheral thickness of the third lens 130 is ET3, and the following condition is satisfied: TL * (CT3 / ET3) = 5.69 (mm). The definition of the peripheral thickness is the distance parallel to the optical axis 190 between the object-side surface 131 and the image-side surface 132 of the third lens 130 at the maximum effective diameter position.

[0129] In the imaging lens group of the first embodiment, the distance from the image-side surface 142 of the fourth lens 140 to the imaging surface 180 on the optical axis 190 is BFL, and the absolute value of the displacement amount parallel to the optical axis 190 from the intersection point of the object-side surface 111 of the first lens 110 on the optical axis 190 to the maximum effective radius position of the object-side surface 111 of the first lens 110 is TDP1, and the following condition is satisfied: BFL / TDP1 = 7.42.

[0130] In the imaging lens group of the first embodiment, the entrance pupil diameter of the imaging lens group is EPD, and the maximum optical effective radius of the object-side surface 111 of the first lens 110 is CA1, and the following condition is satisfied: IMH / (EPD*CA1) = 4.67 (millimeters -1 ).

[0131] In the imaging lens group of the first embodiment, the Abbe number of the first lens 110 is vd1, the Abbe number of the second lens 120 is vd2, and the Abbe number of the third lens 130 is vd3, and the following condition is satisfied: (vd1 + vd3) / vd2 = 5.50.

[0132] In the imaging lens group of the first embodiment, the angle of the chief ray of the maximum viewing angle incident on the imaging surface is CRA, and the entrance pupil diameter of the imaging lens group is EPD, and the following condition is satisfied: CRA / EPD = 38.38 (degrees * millimeters -1 ).

[0133] In the imaging lens group of the first embodiment, the sum of the spacing distances of all adjacent lenses along the optical axis 190 in the imaging lens group is ΣAT, the spacing distance between the first lens 110 and the second lens 120 on the optical axis 190 is T12, and the spacing distance between the third lens 130 and the fourth lens 140 on the optical axis 190 is T34, and the following condition is satisfied: ∑AT / (T12 + T34) = 1.71.

[0134] In the imaging lens group of the first embodiment, the radius of curvature of the object-side surface 111 of the first lens 110 is R1, the radius of curvature of the image-side surface 112 of the first lens 110 is R2, and the radius of curvature of the image-side surface 122 of the second lens 120 is R4, and the following condition is satisfied: R2*R4 / R1 = 127.19 (millimeters).

[0135] In the imaging lens group of the first embodiment, the absolute value of the displacement parallel to the optical axis 190 from the intersection of the image-side surface 122 of the second lens 120 on the optical axis 190 to the position of the maximum effective radius of the image-side surface 122 of the second lens 120 is TDP4, and the absolute value of the displacement parallel to the optical axis 190 from the intersection of the image-side surface 142 of the fourth lens 140 on the optical axis 190 to the position of the maximum effective radius of the image-side surface 142 of the fourth lens 140 is TDP6, and the following condition is satisfied: TDP6 / TDP4 = 10.32.

[0136] In the imaging lens group of the first embodiment, the maximum optical effective radius of the image-side surface 132 of the third lens 130 is CA6, and the spacing distance between the third lens 130 and the fourth lens 140 on the optical axis 190 is T34, and the following condition is satisfied: CA6 / T34 = 23.40.

[0137] In the imaging lens group of the first embodiment, the distance from the image-side surface 142 of the fourth lens 140 to the imaging surface 180 on the optical axis 190 is BFL, and the following condition is satisfied: TL / BFL = 2.46.

[0138] In the imaging lens group of the first embodiment, the focal length of the fourth lens 140 is f4, and the perpendicular distance from the critical point of the image-side surface 142 of the fourth lens 140 to the optical axis 190 is Y42C, and the following condition is satisfied: f4 / Y42C = -1.66; The critical point of the lens surface usually refers to the tangent point where the plane perpendicular to the optical axis is tangent to the lens surface, and the critical point is far from the optical axis. In the first embodiment and other embodiments of the present invention, each lens may have one or more critical points at the off-axis position.

[0139] In the imaging lens group of the first embodiment, the distance from the image-side surface 142 of the fourth lens 140 to the imaging surface 180 on the optical axis 190 is BFL, and the maximum optical effective radius of the image-side surface 132 of the third lens 130 is CA6, and the following condition is satisfied: IMH*Tan(HFOV) / (BFL*CA6) = 2.26 (millimeter -1 )

[0140] In the imaging lens group of the first embodiment, the following condition is satisfied: TL / (Tan(HFOV)*IMH) = 1.25.

[0141] In the imaging lens group of the first embodiment, the imaging lens group satisfies the following condition: CRA = 34.63 (degrees).

[0142] In the imaging lens group of the first embodiment, the imaging lens group satisfies the following condition: TL = 2.38 (millimeter).

[0143] Also refer to Table 1 and Table 2 below for reference.

[0144]

[0145]

[0146]

[0147]

[0148] Table 1 is Figure 1ADetailed structural data of the first embodiment, where the units of the radius of curvature, thickness, gap, and focal length are mm, and the surfaces 0 - 12 represent the surfaces from the object side to the image side in sequence. Among them, surface 0 is the gap on the optical axis 190 between the object and the aperture 100; surface 1 is the gap on the optical axis 190 between the aperture 100 and the object-side surface 111 of the first lens 110, and the object-side surface 111 of the first lens 110 is closer to the object side than the aperture 100, so 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 are the thicknesses of the first lens 110, the second lens 120, the third lens 130, the fourth lens 140, and the infrared cut filter 170 on the optical axis 190 respectively; surfaces 3, 5, 7, 9, 11 are the gaps on the optical axis 190 between the first lens 110 and the second lens 120, between the second lens 120 and the third lens 130, between the third lens 130 and the fourth lens 140, between the fourth lens 140 and the infrared cut filter 170, and between the infrared cut filter 170 and the imaging surface 180 on the optical axis 190 respectively.

[0149] Table 2 shows the aspherical data in the first embodiment. Among them, k represents the conic coefficient in the aspherical curve equation, and A2, A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 are the higher-order aspherical coefficients. In addition, the following example tables correspond to the schematic diagrams and aberration curves of each embodiment. The definitions of the data in the example tables are the same as those in Table 1 and Table 2 of the first embodiment, and will not be elaborated here.

[0150] <Second Embodiment>

[0151] Please refer to Figure 2A and Figure 2B , where Figure 2A is a schematic diagram of the imaging lens group of the second embodiment of the present invention. Figure 2B From left to right are the graphs of the field curvature and distortion of the imaging lens group of the second embodiment. As can be seen from Figure 2A , the imaging lens group includes, in sequence from the object side to the image side: an aperture 200, a first lens 210, a second lens 220, a third lens 230, a fourth lens 240, an infrared cut filter 270, and an imaging surface 280; among which there are four lenses with refractive power in the imaging lens group.

[0152] The first lens 210 has a 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 surfaces.

[0153] The second lens 220 has a negative refractive power and is made of plastic. Its object-side surface 221 is convex near the optical axis 290, and its image-side surface 222 is concave near the optical axis 290. Both the object-side surface 221 and the image-side surface 222 are aspherical surfaces.

[0154] The third lens 230 has a positive refractive power and is made of plastic. Its object-side surface 231 is concave near the optical axis 290, and its image-side surface 232 is convex near the optical axis 290. Both the object-side surface 231 and the image-side surface 232 are aspherical surfaces.

[0155] The fourth lens 240 has a negative 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 concave near the optical axis 290. Both the object-side surface 241 and the image-side surface 242 are aspherical surfaces.

[0156] The infrared cut filter 270 is made of glass. It is disposed between the fourth lens 240 and the imaging surface 280 and does not affect the focal length of the imaging lens group. It can be understood that the infrared cut filter 270 assembly can also be formed on the lens surface, and the infrared cut filter 270 can also be made of other materials.

[0157] Please refer to Tables 3 to 5 below for reference.

[0158]

[0159]

[0160] In the second embodiment, the curve equation of the aspherical surface is expressed in the same form as that of the first embodiment. In addition, the definitions of the following table parameters are the same as those of the first embodiment and will not be elaborated here.

[0161]

[0162] Combined with Table 3 and Table 5, the following data can be deduced:

[0163]

[0164] <Third Embodiment>

[0165] Please refer to Figure 3A and Figure 3B , where Figure 3A is a schematic diagram of the imaging lens group according to the third embodiment of the present invention.Figure 3B Graphs of the field curvature and distortion of the imaging lens group of the third embodiment from left to right in sequence. From Figure 3A It can be seen that the imaging lens group sequentially includes from the object side to the image side: a diaphragm 300, a first lens 310, a second lens 320, a third lens 330, a fourth lens 340, an infrared cut filter 370, and an imaging surface 380; among which, there are four lenses with refractive power in the imaging lens group.

[0166] The first lens 310 has a 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, and both the object-side surface 311 and the image-side surface 312 are aspherical surfaces.

[0167] The second lens 320 has a 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, and both the object-side surface 321 and the image-side surface 322 are aspherical surfaces.

[0168] The third lens 330 has a positive refractive power and is made of plastic. Its object-side surface 331 is concave near the optical axis 390, and its image-side surface 332 is convex near the optical axis 390, and both the object-side surface 331 and the image-side surface 332 are aspherical surfaces.

[0169] The fourth lens 340 has a negative refractive power and is made of plastic. Its object-side surface 341 is convex near the optical axis 390, and its image-side surface 342 is concave near the optical axis 390, and both the object-side surface 341 and the image-side surface 342 are aspherical surfaces.

[0170] The infrared cut filter 370 is made of glass. It is disposed between the fourth lens 340 and the imaging surface 380 and does not affect the focal length of the imaging lens group; it can be understood that the infrared cut filter 370 component can also be formed on the lens surface, and the infrared cut filter 370 can also be made of other materials.

[0171] Please refer to Tables 6 to 8 below for reference.

[0172]

[0173]

[0174]

[0175]

[0176] In the third embodiment, the curve equation of the aspherical surface is expressed in the same form as in the first embodiment. In addition, the definitions of the following table parameters are the same as those in the first embodiment and will not be elaborated here.

[0177]

[0178] Combined with Table 6 and Table 8, the following data can be deduced:

[0179]

[0180] <Fourth Embodiment>

[0181] Please refer to Figure 4A and Figure 4B , where Figure 4A is a schematic diagram of the imaging lens group according to the fourth embodiment of the present invention, Figure 4B is a graph of the field curvature and distortion of the imaging lens group according to the fourth embodiment from left to right. As can be seen from Figure 4A , the imaging lens group sequentially includes from the object side to the image side: a diaphragm 400, a first lens 410, a second lens 420, a third lens 430, a fourth lens 440, an infrared cut filter 470, and an imaging surface 480; among which there are four lenses with refractive power in the imaging lens group.

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

[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 convex near the optical axis 490. Both the object-side surface 421 and the image-side surface 422 are aspherical surfaces.

[0184] The third lens 430 has positive refractive power and is made of plastic. Its object-side surface 431 is concave 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 surfaces.

[0185] The fourth lens 440 has negative refractive power and is made of plastic. Its object-side surface 441 is convex near the optical axis 490, and its image-side surface 442 is concave near the optical axis 490. Both the object-side surface 441 and the image-side surface 442 are aspherical surfaces.

[0186] The infrared cut filter 470 is made of glass and is disposed between the fourth lens 440 and the imaging surface 480 without affecting the focal length of the imaging lens group. It can be understood that the infrared cut filter 470 assembly can also be formed on the lens surface, and the infrared cut filter 470 can also be made of other materials.

[0187] Please refer to Tables 9 to 11 below for reference.

[0188]

[0189]

[0190] In the fourth embodiment, the aspheric curve equation is expressed in the same form as in the first embodiment. In addition, the definitions of the following table parameters are the same as those in the first embodiment and will not be elaborated here.

[0191]

[0192]

[0193] Based on Tables 9 and 11, the following data can be deduced:

[0194]

[0195] <Fifth Embodiment>

[0196] Please refer to Figure 5A and Figure 5B , where Figure 5A is a schematic diagram of the imaging lens group according to the fifth embodiment of the present invention, Figure 5B is a graph of the field curvature and distortion of the imaging lens group of the fifth embodiment from left to right. As can be seen from Figure 5A , the imaging lens group sequentially includes, from the object side to the image side: a diaphragm 500, a first lens 510, a second lens 520, a third lens 530, a fourth lens 540, an infrared cut filter 570, and an imaging surface 580; among which, there are four lenses with refractive power in the imaging lens group.

[0197] The first lens 510 has positive refractive power and is made of plastic. Its object side surface 511 near the optical axis 590 is convex, and its image side surface 512 near the optical axis 590 is concave, and both the object side surface 511 and the image side surface 512 are aspheric surfaces.

[0198] The second lens 520 has negative refractive power and is made of plastic. Its object side surface 521 near the optical axis 590 is concave, and its image side surface 522 near the optical axis 590 is concave, and both the object side surface 521 and the image side surface 522 are aspheric surfaces.

[0199] The third lens 530 has a positive refractive power and is made of plastic. Its object-side surface 531 is concave near the optical axis 590, and its image-side surface 532 is convex near the optical axis 590. Both the object-side surface 531 and the image-side surface 532 are aspherical surfaces.

[0200] The fourth lens 540 has a negative 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 concave near the optical axis 590. Both the object-side surface 541 and the image-side surface 542 are aspherical surfaces.

[0201] The infrared cut filter 570 is made of glass. It is disposed between the fourth lens 540 and the imaging surface 580 and does not affect the focal length of the imaging lens group. It can be understood that the infrared cut filter 570 assembly can also be formed on the lens surface, and the infrared cut filter 570 can also be made of other materials.

[0202] Please refer to Tables 12 to 14 below for reference.

[0203]

[0204]

[0205]

[0206]

[0207] In the fifth embodiment, the curve equation of the aspherical surface is expressed in the same form as that in the first embodiment. In addition, the definitions of the following table parameters are the same as those in the first embodiment and will not be elaborated here.

[0208]

[0209] Based on Tables 12 and 14, the following data can be calculated:

[0210]

[0211] <Sixth Embodiment>

[0212] Please refer to Figure 6A and Figure 6B , where Figure 6A is a schematic diagram of the imaging lens group according to the sixth embodiment of the present invention, Figure 6B is a graph of the field curvature and distortion of the imaging lens group of the sixth embodiment from left to right. From Figure 6AIt can be known that the imaging lens group sequentially includes, from the object side to the image side: a diaphragm 600, a first lens 610, a second lens 620, a third lens 630, a fourth lens 640, an infrared cut filter 670, and an imaging surface 680; among which, there are four lenses with refractive power in the imaging lens group.

[0213] 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 surfaces.

[0214] The second lens 620 has negative refractive power and is made of plastic. Its object-side surface 621 is concave near the optical axis 690, and its image-side surface 622 is convex near the optical axis 690. Both the object-side surface 621 and the image-side surface 622 are aspherical surfaces.

[0215] The third lens 630 has positive refractive power and is made of plastic. Its object-side surface 631 is concave near the optical axis 690, and its image-side surface 632 is convex near the optical axis 690. Both the object-side surface 631 and the image-side surface 632 are aspherical surfaces.

[0216] The fourth lens 640 has negative refractive power and is made of plastic. Its object-side surface 641 is convex near the optical axis 690, and its image-side surface 642 is concave near the optical axis 690. Both the object-side surface 641 and the image-side surface 642 are aspherical surfaces.

[0217] The infrared cut filter 670 is made of glass. It is disposed between the fourth lens 640 and the imaging surface 680 and does not affect the focal length of the imaging lens group; it can be understood that the infrared cut filter 670 component can also be formed on the lens surface, and the infrared cut filter 670 can also be made of other materials.

[0218] Please refer to Tables 15 to 17 below for reference.

[0219]

[0220]

[0221]

[0222] In the sixth embodiment, the curve equation of the aspherical surface is expressed in the form of the first embodiment. In addition, the definitions of the following table parameters are the same as those in the first embodiment and will not be elaborated here.

[0223]

[0224]

[0225] Based on Table 15 and Table 17, the following data can be deduced:

[0226]

[0227] <Seventh Embodiment>

[0228] Please refer to Figure 7A and Figure 7B , where Figure 7A is a schematic diagram of the imaging lens group according to the seventh embodiment of the present invention, Figure 7B and Figure 7B is a graph of the field curvature and distortion of the imaging lens group of the seventh embodiment, arranged in order from left to right. As can be seen from Figure 7A , the imaging lens group sequentially includes, from the object side to the image side: a diaphragm 700, a first lens 710, a second lens 720, a third lens 730, a fourth lens 740, an infrared cut filter 770, and an imaging surface 780; among which there are four lenses with refractive power in the imaging lens group.

[0229] The first lens 710 has a 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, and both the object-side surface 711 and the image-side surface 712 are aspherical surfaces.

[0230] The second lens 720 has a negative refractive power and is made of plastic. Its object-side surface 721 is concave near the optical axis 790, and its image-side surface 722 is concave near the optical axis 790, and both the object-side surface 721 and the image-side surface 722 are aspherical surfaces.

[0231] The third lens 730 has a positive refractive power and is made of plastic. Its object-side surface 731 is concave near the optical axis 790, and its image-side surface 732 is convex near the optical axis 790, and both the object-side surface 731 and the image-side surface 732 are aspherical surfaces.

[0232] The fourth lens 740 has a negative refractive power and is made of plastic. Its object-side surface 741 is convex near the optical axis 790, and its image-side surface 742 is concave near the optical axis 790, and both the object-side surface 741 and the image-side surface 742 are aspherical surfaces.

[0233] The infrared cut filter 770 is made of glass and is disposed between the fourth lens 740 and the imaging surface 780 without affecting the focal length of the imaging lens group; it can be understood that the infrared cut filter 770 component can also be formed on the lens surface, and the infrared cut filter 770 can also be made of other materials.

[0234] Please refer to Tables 18 to 20 below for reference.

[0235]

[0236]

[0237]

[0238]

[0239] In the seventh embodiment, the curve equation of the aspherical surface is expressed in the same form as in the first embodiment. In addition, the definitions of the following table parameters are the same as those in the first embodiment and will not be elaborated here.

[0240]

[0241] Based on Tables 18 and 20, the following data can be deduced:

[0242]

[0243] <Eighth Embodiment>

[0244] Please refer to Figure 8A and Figure 8B , where Figure 8A is a schematic diagram of the imaging lens group according to the eighth embodiment of the present invention, Figure 8B is a graph of the field curvature and distortion of the imaging lens group according to the eighth embodiment of the present invention from left to right. As can be seen from Figure 8A , the imaging lens group sequentially includes, from the object side to the image side: a diaphragm 800, a first lens 810, a second lens 820, a third lens 830, a fourth lens 840, an infrared cut filter 870, and an imaging surface 880; among which there are four lenses with refractive power in the imaging lens group.

[0245] The first lens 810 has positive refractive power and is made of plastic. Its object-side surface 811 is convex near the optical axis 890, and its image-side surface 812 is concave near the optical axis 890, and both the object-side surface 811 and the image-side surface 812 are aspherical surfaces.

[0246] The second lens 820 has positive refractive power and is made of plastic. Its object-side surface 821 is convex near the optical axis 890, and its image-side surface 822 is concave near the optical axis 890, and both the object-side surface 821 and the image-side surface 822 are aspherical surfaces.

[0247] The third lens 830 has a positive refractive power and is made of plastic. Its object-side surface 831 is concave near the optical axis 890, and its image-side surface 832 is convex near the optical axis 890. Both the object-side surface 831 and the image-side surface 832 are aspherical surfaces.

[0248] The fourth lens 840 has a negative refractive power and is made of plastic. Its object-side surface 841 is convex near the optical axis 890, and its image-side surface 842 is concave near the optical axis 890. Both the object-side surface 841 and the image-side surface 842 are aspherical surfaces.

[0249] The infrared cut filter 870 is made of glass. It is disposed between the fourth lens 840 and the imaging surface 880 and does not affect the focal length of the imaging lens group. It can be understood that the infrared cut filter 870 assembly can also be formed on the lens surface, and the infrared cut filter 870 can also be made of other materials.

[0250] Please refer to Tables 21 to 23 below for reference.

[0251]

[0252]

[0253]

[0254] In the eighth embodiment, the curve equation of the aspherical surface is expressed in the same form as that in the first embodiment. In addition, the definitions of the following table parameters are the same as those in the first embodiment and will not be elaborated here.

[0255]

[0256] Based on Table 21 and Table 23, the following data can be deduced:

[0257]

[0258]

[0259] <Ninth Embodiment>

[0260] Please refer to Figure 9 , Figure 9The camera module according to the ninth embodiment of the present invention. The camera module 4000 includes a lens barrel 1000 (Lens Barrel), 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 component with good sensitivity and low noise (such as CMOS, CCD) to truly present the imaging quality of the imaging lens group.

[0261] In the foregoing embodiments, those of ordinary skill 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. The glass lens can increase the degree of 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.

[0262] In the imaging lens group provided by the present invention, for a lens having refractive power, if the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex 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.

[0263] In the imaging lens group provided by the present invention, the maximum effective radius of the lens surface generally refers to the radius of the maximum effective optical region of the lens surface (usually it can refer to the region of the lens that has not undergone surface treatment, anti-reflection treatment, or has not been coated with a light-shielding layer, but is not limited thereto).

[0264] The imaging lens group and the camera module provided by the present invention can be more widely applied to the electronic imaging systems in portable electronic devices, photography, monitoring, automation equipment, vehicle surround view systems, and Internet of Things (IoT) devices, but are not limited thereto.

Claims

1. An imaging lens assembly, characterized in that: It includes a diaphragm and, in sequence from the object side to the image side, includes: A first lens with positive refractive power; A second lens with refractive power; A third lens with positive refractive power; and A fourth lens with negative refractive power; The total number of lenses in the imaging lens group is four, the distance from the object side surface of the first lens to the imaging surface on the optical axis is TL, half of the maximum viewing angle of the imaging lens group is HFOV, the maximum optical effective radius of the image side surface of the fourth lens is CA8, the maximum imaging height of the imaging lens group is IMH, and the following conditions are met: 32.46 degrees * mm -1 < TL*HFOV / (CA8*IMH)<54.39 degrees*mm -1 .

2. The imaging lens assembly according to claim 1, characterized in that: The thickness of the third lens on the optical axis is CT3, and the peripheral thickness of the third lens is ET3, and the following condition is satisfied: 3.39 mm < TL * (CT3 / ET3) < 6.83 mm.

3. The imaging lens assembly according to claim 1, characterized in that: The distance on the optical axis from the image side surface of the fourth lens to the imaging surface is BFL, and the absolute value of the displacement parallel to the optical axis from the intersection point of the object side surface of the first lens on the optical axis to the maximum effective radius position of the object side surface of the first lens is TDP1, and the following condition is satisfied: 4.96 < BFL / TDP1 < 15.

32.

4. The imaging lens assembly according to claim 1, characterized in that: The entrance pupil diameter of the imaging lens group is EPD, and the maximum optical effective radius of the object side surface of the first lens is CA1, and the following condition is satisfied: 3.53 mm -1 <IMH / (EPD * CA1) < 7.28 mm -1 .

5. The imaging lens assembly according to claim 1, characterized in that: The Abbe number of the first lens is vd1, the Abbe number of the second lens is vd2, and the Abbe number of the third lens is vd3, and the following condition is satisfied: 3.74 < (vd1 + vd3) / vd2 < 6.

98.

6. The imaging lens assembly according to claim 1, characterized in that: The angle of the chief ray of the maximum viewing angle of the imaging lens group incident on the imaging surface is CRA, and the entrance pupil diameter of the imaging lens group is EPD, and the following conditions are satisfied: 29.61 degrees * mm -1 <CRA / EPD < 54.20 degrees * mm -1 .

7. The imaging lens assembly according to claim 1, characterized in that: The sum of the spacing distances along the optical axis of all adjacent lenses in the imaging lens group is ΣAT, the spacing distance between the first lens and the second lens on the optical axis is T12, and the spacing distance between the third lens and the fourth lens on the optical axis is T34, and the following condition is satisfied: 0.99 < ∑AT / (T12 + T34) < 2.

05.

8. The imaging lens assembly according to claim 1, characterized in that: 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, and the radius of curvature of the image side surface of the second lens is R4, and the following condition is satisfied: -2354.04 mm < R2 * R4 / R1 < 265.45 mm.

9. The imaging lens assembly according to claim 1, characterized in that: The absolute value of the displacement parallel to the optical axis from the intersection point of the image side surface of the second lens on the optical axis to the maximum effective radius position of the image side surface of the second lens is TDP4, and the absolute value of 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 maximum effective radius position of the image side surface of the fourth lens is TDP6, and the following condition is satisfied: 2.99 < TDP6 / TDP4 < 80.

51.

10. The imaging lens assembly according to claim 1, characterized in that: The maximum optical effective radius of the image side surface of the third lens is CA6, and the spacing distance between the third lens and the fourth lens on the optical axis is T34, and the following condition is satisfied: 2.69 < CA6 / T34 < 28.

28.

11. The imaging lens assembly according to claim 1, characterized in that: The distance on the optical axis from the image side surface of the fourth lens to the imaging surface is BFL, and the following condition is satisfied: 1.95 < TL / BFL < 3.

43.

12. The imaging lens assembly according to claim 1, characterized in that: The focal length of the fourth lens is f4, and the perpendicular distance from the critical point of the image side surface of the fourth lens to the optical axis is Y42C, and the following condition is satisfied: -5.90 < f4 / Y42C < -0.

88.

13. The imaging lens assembly according to claim 1, characterized in that: The distance from the image-side surface of the fourth lens to the imaging surface on the optical axis is BFL, and the maximum optical effective radius of the image-side surface of the third lens is CA6, and the following condition is satisfied: 1.81 mm -1 <IMH*Tan(HFOV) / (BFL*CA6)<4.38 mm -1 .

14. The imaging lens assembly according to claim 1, characterized in that: The following conditions are satisfied: 0.84 < TL / (Tan(HFOV) * IMH) < 1.

74.

15. A camera module, characterized in that: It includes: A lens barrel; An imaging lens group as described in any one of claims 1 to 14, disposed in the lens barrel; and An image sensor disposed on the imaging surface of the imaging lens group.

Images