TW201723567A - Optical lens system with a wide field of view - Google Patents

Abstract

An optical lens system with a wide field of view includes, in order from the object side to the image side: a stop, a first lens element with a positive refractive power, a second lens element with a negative refractive power, and a third lens element with a positive refractive power. A focal length of the first lens element and the second lens element combined is f12, a focal length of the third lens element is f3, and they satisfy the relation: 0.3 < f12/f3 < 0.9, so that the optical lens system has a wide field of view, high resolution, short length and less distortion.

Description

Wide-angle imaging lens set

[1] The present invention relates to a wide-angle imaging lens set, and more particularly to a miniaturized three-piece wide-angle imaging lens set applied to an electronic product.

[2] With the rise of electronic products with photography capabilities, the demand for optical systems is increasing. In the shooting, in order to obtain a wider shooting range, the angle of view of the lens is required to meet certain requirements, and thus the requirements for the angle and quality of the lens are becoming stricter. Usually, the angle of the lens (the field of view FOV) is designed to be 50 to 60 degrees. If the angle of the above design is exceeded, not only the aberration is large, but also the design of the lens is complicated. Conventional US 8335043, US 8576497 use 2 lens groups, 5-6 pieces to achieve a large angle purpose, but its distortion is too large, and such as US 8593737, US 8576497, US 8395853, although it can achieve a large angle purpose, However, the total length (TL) of the lens group is too long. [3] Therefore, how to develop a miniaturized wide-angle imaging lens set, which can be equipped with a lens for a digital camera, a lens for a network camera, or a mobile phone lens, etc. The horn, the effect of reducing the aberration, to reduce the complexity of the lens design, is the motivation for the development of the present invention.

[4] The object of the present invention is to provide a wide-angle imaging lens set, in particular to a three-piece wide-angle imaging lens set with improved drawing angle, high resolution, short lens length and small distortion. [5] The edge is that, in order to achieve the above object, a wide-angle imaging lens set according to the present invention includes, in order from the object side to the image side, an aperture; a first lens having a positive refractive power and an object side surface thereof; The near optical axis is a convex surface, and the image side surface is convex at the near optical axis, and at least one surface of the object side surface and the image side surface is aspherical; a second lens has a negative refractive power, and the object side surface is near the optical axis The concave surface is convex on the side surface of the image side surface, and at least one surface of the object side surface and the image side surface is aspherical; a third lens has a positive refractive power, and the object side surface is convex at the near optical axis The image side surface has a concave surface at a near optical axis, and at least one surface of the object side surface and the image side surface is aspherical, and at least one surface of the object side surface and the image side surface has at least one inflection point; [6] The combined focal length of the first lens and the second lens is f12, and the focal length of the third lens is f3, and the following conditions are satisfied: 0.3 < f12/f3 < 0.9. [7] When f12/f3 satisfies the above conditions, the wide-angle imaging lens group can significantly improve the resolution of the image while obtaining a wide angle of view (angle of view). [8] Preferably, the focal length of the first lens is f1, the focal length of the second lens is f2, and the following condition is satisfied: -0.7 < f1/f2 < -0.35. Thereby, the refractive power arrangement of the first lens and the second lens is suitable, which is advantageous for obtaining a wide angle of view (angle of view) and reducing excessive increase of system aberration. [9] Preferably, the focal length of the second lens is f2, the focal length of the third lens is f3, and the following condition is satisfied: -0.85 < f2/f3 < -0.35. Thereby, the arrangement of the refractive power of the second lens and the third lens is balanced, which contributes to the correction of the aberration and the reduction of the sensitivity. [10] Preferably, the focal length of the first lens is f1, the focal length of the third lens is f3, and the following condition is satisfied: 0.1 < f1/f3 < 0.45. Thereby, the positive refractive power of the first lens is effectively distributed, and the sensitivity of the wide-angle imaging lens group is reduced. [11] Preferably, the focal length of the first lens is f1, the combined focal length of the second lens and the third lens is f23, and the following condition is satisfied: -0.45 < f1/f23 < -0.05. Thereby, the wide-angle imaging lens group can significantly improve the resolution of the image while obtaining a wide angle of view (angle of view). [12] Preferably, the combined focal length of the second lens and the third lens is f23, and the overall focal length of the wide-angle imaging lens group is f, and the following condition is satisfied: -8 < f23/f < -1.7. Therefore, when f23/f satisfies the foregoing relationship, the wide-angle imaging lens group can have a large picture angle, a large aperture, a high number of pictures, and a low lens height, and the resolution capability is remarkably improved, and vice versa. The range of data values will result in problems in the performance, low resolution, and insufficient yield of the wide-angle imaging lens set. [13] Preferably, the overall focal length of the wide-angle imaging lens group is f, the distance from the object-side surface of the first lens to the imaging surface on the optical axis is TL, and the following condition is satisfied: 0.5 < f/TL < 0.8 . Thereby, it is advantageous to obtain a wide angle of view (angle of view) and to facilitate the miniaturization of the wide-angle imaging lens group to be mounted on a thin electronic product. [14] Preferably, the wide angle of view of the wide-angle imaging lens group is FOV and satisfies the following condition: 75 < FOV < 95. Thereby, the wide-angle imaging lens set can have a suitable larger field of view. [15] Preferably, the thickness of the first lens on the optical axis is CT1, and the thickness of the second lens on the optical axis is CT2, and the following condition is satisfied: 1.5 < CT1/CT2 < 2.5. Thereby, the first lens and the second lens have an appropriate thickness, which makes injection molding easier. [16] Preferably, the distance between the first lens and the second lens on the optical axis is T12, and the thickness of the second lens on the optical axis is CT2, and the following conditions are satisfied: 0.5 < T12/CT2 < 0.95 . Thereby, the maximum angle of view of the wide-angle imaging lens group can be further increased. [17] Preferably, the distance between the second lens and the third lens on the optical axis is T23, and the thickness of the third lens on the optical axis is CT3, and the following conditions are satisfied: 0.05 < T23/CT3 < 0.7 . Thereby, the maximum angle of view of the wide-angle imaging lens group can be further increased. [18] Preferably, the thickness of the third lens on the optical axis is CT3, and the thickness of the second lens on the optical axis is CT2, and the following condition is satisfied: 0.9 < CT3/CT2 < 1.9. Thereby, the length of the lens can be further shortened, and the second lens and the third lens can be easily formed, thereby reducing the cost. Preferably, the image side surface has a radius of curvature R2, and the second lens has an object side surface radius of curvature R3 and satisfies the following condition: 2.4 < R2/R3 < 3.7. Thereby, the spherical aberration and astigmatism of the wide-angle imaging lens group are effectively reduced. [20] Preferably, the image side surface has a radius of curvature R4, and the object side surface of the third lens has a radius of curvature of R5 and satisfies the following condition: -1.55 < R4/R5 < -0.5. Thereby, the spherical aberration and astigmatism of the wide-angle imaging lens group are effectively reduced. Preferably, the first lens has a dispersion coefficient of V1, the second lens has a dispersion coefficient of V2, and satisfies the following condition: 30 < V1-V2<42. Thereby, the chromatic aberration of the wide-angle imaging lens group is effectively reduced. [22] The techniques, means, and other effects of the present invention in order to achieve the above objects are as described in the following.

[First Embodiment] [25] Referring to FIG. 1A and FIG. 1B, FIG. 1A is a schematic diagram of a wide-angle imaging lens group according to a first embodiment of the present invention, and FIG. 1B is sequentially from left to right. A spherical aberration, astigmatism, and distortion curve of a wide-angle imaging lens set of an embodiment. As can be seen from FIG. 1A, the wide-angle imaging lens assembly includes an aperture 100 and an optical group. The optical group sequentially includes a first lens 110, a second lens 120, a third lens 130, and an infrared filter from the object side to the image side. The light element 170, and the imaging surface 180, wherein the lens having the refractive power in the wide-angle imaging lens group is three pieces. The aperture 100 is disposed between the image side surface 112 of the first lens 110 and the subject. [26] The first lens 110 has a positive refractive power and is made of a plastic material. The object side surface 111 is convex at the near optical axis 190, and the image side surface 112 is convex at the near optical axis 190, and the object side surface 111 is The image side surface 112 is aspherical. [27] The second lens 120 has a negative refractive power and is made of a plastic material. The object side surface 121 is concave at the near optical axis 190, and the image side surface 122 is convex at the near optical axis 190, and the object side surface 121 The image side surface 122 is aspherical. [28] The third lens 130 has a positive refractive power and is made of a plastic material. The object side surface 131 is convex at the near optical axis 190, and the image side surface 132 is concave at the near optical axis 190, and the object side surface 131 The image side surface 132 is aspherical, and the object side surface 131 and the image side surface 132 have at least one surface having at least one inflection point. [29] The infrared filter element 170 is made of glass and disposed between the third lens 130 and the imaging surface 180 without affecting the focal length of the wide-angle imaging lens group. [30] The aspherical curve equations of the above lenses are expressed as follows: [31] [32] where z is a position value with reference to the surface apex at a position of height h in the direction of the optical axis 190; 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 a conic constant, and A, B, C, D, E, G, ... is a high-order aspheric coefficient. [33] In the wide-angle imaging lens group of the first embodiment, the focal length of the wide-angle imaging lens group is f, the aperture value (f-number) of the wide-angle imaging lens group is Fno, and the maximum angle of view in the wide-angle imaging lens group (arrow angle) For FOV, the values are as follows: f = 1.261 (mm); Fno = 2.0; and FOV = 77 (degrees). [34] In the wide-angle imaging lens group of the first embodiment, the composite focal length of the first lens 110 and the second lens 120 is f12, and the focal length of the third lens 130 is f3, and the following conditions are satisfied: f12/f3 = 0.3875 . In the wide-angle imaging lens group of the first embodiment, the focal length of the first lens 110 is f1, the focal length of the second lens 120 is f2, and the following condition is satisfied: f1/f2 = -0.5152. [36] In the wide-angle imaging lens group of the first embodiment, the focal length of the second lens 120 is f2, the focal length of the third lens 130 is f3, and the following condition is satisfied: f2/f3 = -0.3650. In the wide-angle imaging lens group of the first embodiment, the focal length of the first lens 110 is f1, the focal length of the third lens 130 is f3, and the following condition is satisfied: f1/f3 = 0.1881. [38] In the wide-angle imaging lens group of the first embodiment, the focal length of the first lens 110 is f1, and the combined focal length of the second lens 120 and the third lens 130 is f23, and the following conditions are satisfied: f1/f23 = - 0.3430. [39] In the wide-angle imaging lens group of the first embodiment, the composite focal length of the second lens 120 and the third lens 130 is f23, and the overall focal length of the wide-angle imaging lens group is f, and the following condition is satisfied: f23/f = -2.0062. [40] In the wide-angle imaging lens group of the first embodiment, the overall focal length of the wide-angle imaging lens group is f, and the distance from the object-side surface 111 to the imaging surface 180 of the first lens 110 on the optical axis 190 is TL, and The following conditions are met: f/TL = 0.6731. [41] In the wide-angle imaging lens group of the first embodiment, the thickness of the first lens 110 on the optical axis 180 is CT1, and the thickness of the second lens 120 on the optical axis 180 is CT2, and the following conditions are satisfied: CT1 / CT2 = 2.3224. In the wide-angle imaging lens group of the first embodiment, the distance between the first lens 110 and the second lens 120 on the optical axis 190 is T12, and the thickness of the second lens 120 on the optical axis 190 is CT2. The following conditions are met: T12/CT2 = 0.7941. [43] In the wide-angle imaging lens group of the first embodiment, the second lens 120 and the third lens 130 are spaced apart from each other on the optical axis 190 by a distance T23, and the thickness of the third lens 130 on the optical axis 190 is CT3. The following conditions are met: T23/CT3 = 0.0844. [44] In the wide-angle imaging lens group of the first embodiment, the thickness of the third lens 130 on the optical axis 190 is CT3, and the thickness of the second lens 120 on the optical axis 180 is CT2, and the following conditions are satisfied: CT3 / CT2 = 1.7484. [45] In the wide-angle imaging lens group of the first embodiment, the image side surface 112 of the first lens 110 has a radius of curvature R2, and the object side surface 121 of the second lens 120 has a radius of curvature of R3, and satisfies the following conditions: R2 /R3 = 2.6916. In the wide-angle imaging lens group of the first embodiment, the image side surface 122 of the second lens 120 has a radius of curvature R4, and the object side surface 131 of the third lens 130 has a radius of curvature of R5 and satisfies the following conditions: R4 /R5 = -0.6278. In the wide-angle imaging lens group of the first embodiment, the first lens 110 has a dispersion coefficient of V1, and the second lens 120 has a dispersion coefficient of V2 and satisfies the following conditions: V1-V2 = 34.5. [48] Refer to Table 1 and Table 2 below for reference. [49] [50] Table 1 is the detailed structural data of the first embodiment of Fig. 1A, in which the unit of curvature radius, thickness and focal length is mm, and the surfaces 0-11 sequentially represent the surface from the object side to the image side. Table 2 is the aspherical data in the first embodiment, wherein the cone coefficients in the a-spherical curve equation of k, A, B, C, D, E, F, ... are high-order aspheric coefficients. In addition, the table of the following embodiments corresponds to the schematic diagram and the aberration diagram of each embodiment, and the definition of the data in the table is the same as the definitions of Table 1 and Table 2 of the first embodiment, and details are not described herein. [2] <Second Embodiment> [53] Please refer to FIG. 2A and FIG. 2B, wherein FIG. 2A is a schematic diagram of a wide-angle imaging lens group according to a second embodiment of the present invention, and FIG. 2B is sequentially from left to right. The spherical aberration, astigmatism, and distortion curves of the wide-angle imaging lens set of the second embodiment. As can be seen from FIG. 2A, the wide-angle imaging lens assembly includes an aperture 200 and an optical group. The optical group includes the first lens 210, the second lens 220, the third lens 230, and the infrared filter from the object side to the image side. The light element 270, and the imaging surface 280, wherein the lens having the refractive power in the wide-angle imaging lens group is three pieces. The aperture 200 is disposed between the image side surface 212 of the first lens 210 and the object. The first lens 210 has a positive refractive power and is made of a plastic material. The object side surface 211 is convex at the near optical axis 290, and the image side surface 212 is convex at the near optical axis 290, and the object side surface 211 The image side surface 212 is aspherical. [55] The second lens 220 has a negative refractive power and is made of a plastic material. The object side surface 221 is concave at the near optical axis 290, and the image side surface 222 is convex at the near optical axis 290, and the object side surface 221 The image side surface 222 is aspherical. The third lens 230 has a positive refractive power and is made of a plastic material. The object side surface 231 is convex at the near optical axis 290, and the image side surface 232 is concave at the near optical axis 290, and the object side surface 231 is 231. The image side surface 232 is aspherical, and the object side surface 231 and the image side surface 232 have at least one surface having at least one inflection point. The infrared filter element 270 is made of glass and disposed between the third lens 230 and the imaging surface 280 without affecting the focal length of the wide-angle imaging lens group. [58] Refer to Table 3 and Table 4 below. [59] [60] In the second embodiment, the aspherical curve equation represents the 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 described herein. [62] The following data can be derived in conjunction with Table 3 and Table 4: [63] [6] <Third Embodiment> [65] Please refer to FIG. 3A and FIG. 3B, wherein FIG. 3A is a schematic diagram of a wide-angle imaging lens group according to a third embodiment of the present invention, and FIG. 3B is sequentially from left to right. The spherical aberration, astigmatism, and distortion curves of the wide-angle imaging lens set of the three embodiments. As can be seen from FIG. 3A, the wide-angle imaging lens assembly includes an aperture 300 and an optical group. The optical group sequentially includes a first lens 310, a second lens 320, a third lens 330, and an infrared filter from the object side to the image side. The light element 370, and the imaging surface 380, wherein the lens having the refractive power in the wide-angle imaging lens group is three pieces. The aperture 300 is disposed between the image side surface 312 of the first lens 310 and the subject. [66] The first lens 310 has a positive refractive power and is made of a plastic material. The object side surface 311 is convex at the near optical axis 390, and the image side surface 312 is convex at the near optical axis 390, and the object side surface 311 The image side surface 312 is aspherical. [67] The second lens 320 has a negative refractive power and is made of a plastic material. The object side surface 321 is concave at the near optical axis 390, and the image side surface 322 is convex at the near optical axis 390, and the object side surface 321 The image side surface 322 is aspherical. The third lens 330 has a positive refractive power and is made of a plastic material. The object side surface 331 is convex at the near optical axis 390, and the image side surface 332 is concave at the near optical axis 390, and the object side surface 331 The image side surface 332 is aspherical, and the object side surface 331 and the image side surface 332 have at least one surface having at least one inflection point. The infrared filter element 370 is made of glass and disposed between the third lens 330 and the imaging surface 380 without affecting the focal length of the wide-angle imaging lens group. [C] a cover glass 340 disposed between the infrared filter 370 and the imaging surface 390, such that the cover glass 340 is made of glass and does not affect the focal length of the wide-angle imaging lens group. The cover glass 340 is used to protect the sensing element (not shown). [71] Refer to Table 5 and Table 6 below. [72] [73] In the third embodiment, the aspherical curve equation represents the 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 described herein. [75] The following data can be derived in conjunction with Table 5 and Table 6: [76] [4] <Fourth Embodiment> [78] Please refer to FIG. 4A and FIG. 4B, wherein FIG. 4A is a schematic diagram of a wide-angle imaging lens group according to a fourth embodiment of the present invention, and FIG. 4B is sequentially from left to right. The spherical aberration, astigmatism, and distortion curves of the wide-angle imaging lens set of the four embodiments. As can be seen from FIG. 4A, the wide-angle imaging lens assembly includes an aperture 400 and an optical group including the first lens 410, the second lens 420, the third lens 430, and the infrared filter from the object side to the image side. The light element 470, and the imaging surface 480, wherein the lens having the refractive power in the wide-angle imaging lens group is three pieces. The aperture 400 is disposed between the image side surface 412 of the first lens 410 and the object. The first lens 410 has a positive refractive power and is made of a plastic material. The object side surface 411 is convex at the near optical axis 490, and the image side surface 412 is convex at the near optical axis 490, and the object side surface 411 The image side surface 412 is aspherical. The second lens 420 has a negative refractive power and is made of a plastic material. The object side surface 421 is concave at the near optical axis 490, and the image side surface 422 is convex at the near optical axis 490, and the object side surface 421 The image side surface 422 is aspherical. The third lens 430 has a positive refractive power and is made of a plastic material. The object side surface 431 is convex at the near optical axis 490, and the image side surface 432 is concave at the near optical axis 490, and the object side surface 431 is concave. The image side surface 432 is aspherical, and the object side surface 431 and the image side surface 432 have at least one surface having at least one inflection point. The infrared filter element 470 is made of glass and disposed between the third lens 430 and the imaging surface 480 without affecting the focal length of the wide-angle imaging lens group. [C] a cover glass 440 disposed between the infrared filter 470 and the imaging surface 490, such that the cover glass 440 is made of glass and does not affect the focal length of the wide-angle imaging lens group. The cover glass 440 is used to protect the sensing element (not shown). [84] Refer to Table 7 and Table 8 below for reference. [85] [86] In the fourth embodiment, the aspherical curve equation represents the 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 described herein. [88] The following data can be derived in conjunction with Table 7 and Table 8: [89] [90] The wide-angle imaging lens set provided by the present invention can be made of plastic or glass. When the lens material is plastic, the production cost can be effectively reduced. When the lens is made of glass, the refractive power of the wide-angle imaging lens group can be increased. The degree of freedom of configuration. In addition, the object side surface and the image side surface of the lens in the wide-angle imaging lens group may be aspherical, and the aspheric surface can be easily formed into a shape other than the spherical surface, and more control variables are obtained to reduce the aberration and thereby reduce the use of the lens. The number can therefore effectively reduce the overall length of the wide-angle imaging lens set of the present invention. [91] In the wide-angle imaging lens set provided by the present invention, in the case of a lens having a refractive power, if the surface of the lens is convex and the position of the convex surface is not defined, it indicates that the surface of the lens is convex at the near-optical axis; If the lens surface is concave and the concave position is not defined, it indicates that the lens surface is concave at the low beam axis. [92] The wide-angle imaging lens set provided by the present invention is more suitable for use in a moving focus optical system, and has the characteristics of excellent aberration correction and good imaging quality, and can be applied to 3D (three-dimensional) image capturing in various aspects. In electronic imaging systems such as digital cameras, mobile devices, digital tablets or car photography. In the above, the above embodiments and the drawings are only the preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, that is, the average variation of the scope of the patent application of the present invention is Modifications are all within the scope of the invention.

[94]
100, 200, 300, 400‧ ‧ aperture
110, 210, 310, 410‧‧‧ first lens
111, 211, 311, 411‧‧‧ ‧ side surface
112, 212, 312, 412‧‧‧ side surface
120, 220, 320, 420‧‧‧ second lens
121, 221, 321, 421‧‧‧ ‧ side surface
122, 222, 322, 422‧‧‧ image side surface
130, 230, 330, 430‧‧‧ third lens
131, 231, 331, 431 ‧ ‧ ‧ side surface
132, 232, 332, 432‧‧‧ image side surface
170, 270, 370, 470‧‧‧ Infrared filtering filter elements
180, 280, 380, 480 ‧ ‧ imaging surface
190, 290, 390, 490‧‧‧ optical axis
f‧‧‧Focus of the wide-angle imaging lens set
Aperture value of Fno‧‧‧ wide-angle imaging lens set
Maximum field of view in the FOV‧‧‧ wide-angle imaging lens set
F1‧‧‧The focal length of the first lens
F2‧‧‧The focal length of the second lens
F12‧‧‧Combined focal length of the first lens and the second lens
F23‧‧‧Combined focal length of the second lens and the third lens
R2‧‧‧ Image side surface radius of curvature of the first lens
R3‧‧‧ radius of curvature of the object side surface of the second lens
R4‧‧‧ Image side surface radius of curvature of the second lens
The radius of curvature of the object side surface of the R5‧‧‧ third lens
V1‧‧‧Dispersion coefficient of the first lens
V2‧‧‧Dispersion coefficient of the second lens
CT1‧‧‧ thickness of the first lens on the optical axis
CT2‧‧‧ thickness of the second lens on the optical axis
CT3‧‧‧ thickness of the third lens on the optical axis
T12‧‧‧The distance between the first lens and the second lens on the optical axis
T23‧‧‧Separation distance between the second lens and the third lens on the optical axis
TL‧‧‧The distance from the object side surface of the first lens to the imaging surface on the optical axis

Fig. 1A is a schematic view showing a wide-angle imaging lens group of a first embodiment of the present invention. 1B is a spherical aberration, astigmatism, and distortion curve of the wide-angle imaging lens group of the first embodiment, from left to right. 2A is a schematic view of a wide-angle imaging lens set of a second embodiment of the present invention. 2B is a spherical aberration, astigmatism, and distortion curve of the wide-angle imaging lens group of the second embodiment, from left to right. Fig. 3A is a schematic view showing a wide-angle imaging lens group of a third embodiment of the present invention. 3B is a spherical aberration, astigmatism, and distortion curve of the wide-angle imaging lens group of the third embodiment, from left to right. 4A is a schematic view of a wide-angle imaging lens set of a fourth embodiment of the present invention. 4B is a spherical aberration, astigmatism, and distortion curve of the wide-angle imaging lens group of the fourth embodiment, from left to right.

100‧‧‧ aperture

110‧‧‧first lens

111‧‧‧Side side surface

112‧‧‧ image side surface

120‧‧‧second lens

121‧‧‧Side side surface

122‧‧‧ image side surface

130‧‧‧ third lens

131‧‧‧ object side surface

132‧‧‧Image side surface

170‧‧‧Infrared filter components

180‧‧‧ imaging surface

190‧‧‧ optical axis

Claims (15)

A wide-angle imaging lens set comprising: an aperture from the object side to the image side: a first lens having a positive refractive power, the object side surface being convex at the near optical axis, and the image side surface being convex at the near optical axis At least one surface of the object side surface and the image side surface is aspherical; a second lens has a negative refractive power, and the object side surface is concave at the near optical axis, and the image side surface is convex at the near optical axis, At least one surface of the side surface and the image side surface is aspherical; a third lens has a positive refractive power, and the object side surface is convex at the near optical axis, and the image side surface is concave at the near optical axis, and the object side surface thereof At least one surface of the image side surface is aspherical, and at least one surface of the object side surface and the image side surface has at least one inflection point; wherein a composite focal length of the first lens and the second lens is f12, and a focal length of the third lens is F3, and the following conditions are met: 0.3 < f12/f3 < 0.9. The wide-angle imaging lens set according to claim 1, wherein the focal length of the first lens is f1, the focal length of the second lens is f2, and the following condition is satisfied: -0.7 < f1/f2 < -0.35. The wide-angle imaging lens set according to claim 1, wherein the focal length of the second lens is f2, the focal length of the third lens is f3, and the following condition is satisfied: -0.85 < f2/f3 < -0.35. The wide-angle imaging lens set according to claim 1, wherein the focal length of the first lens is f1, the focal length of the third lens is f3, and the following condition is satisfied: 0.1 < f1/f3 < 0.45. The wide-angle imaging lens set according to claim 1, wherein a focal length of the first lens is f1, a combined focal length of the second lens and the third lens is f23, and the following condition is satisfied: -0.45 < f1/f23 < -0.05 . The wide-angle imaging lens set according to claim 1, wherein the second lens and the third lens have a combined focal length of f23, and the wide-angle imaging lens group has an overall focal length of f, and satisfies the following condition: -8 < f23/f < - 1.7. The wide-angle imaging lens set according to claim 1, wherein the total focal length of the wide-angle imaging lens group is f, the distance from the object-side surface of the first lens to the imaging surface on the optical axis is TL, and the following condition is satisfied: 0.5 < f/TL < 0.8. The wide-angle imaging lens set according to claim 1, wherein the wide-angle imaging lens group has a maximum angle of view of FOV and satisfies the following condition: 75 < FOV < 95. The wide-angle imaging lens set according to claim 1, wherein the thickness of the first lens on the optical axis is CT1, the thickness of the second lens on the optical axis is CT2, and the following condition is satisfied: 1.5 < CT1/CT2 < 2.5. The wide-angle imaging lens set according to claim 1, wherein the distance between the first lens and the second lens on the optical axis is T12, the thickness of the second lens on the optical axis is CT2, and the following condition is satisfied: 0.5 < T12/CT2 < 0.95. The wide-angle imaging lens set according to claim 1, wherein a distance between the second lens and the third lens on the optical axis is T23, a thickness of the third lens on the optical axis is CT3, and the following condition is satisfied: 0.05 < T23/CT3 < 0.7. The wide-angle imaging lens set according to claim 1, wherein the thickness of the third lens on the optical axis is CT3, the thickness of the second lens on the optical axis is CT2, and the following condition is satisfied: 0.9 < CT3/ CT2 < 1.9. The wide-angle imaging lens set according to claim 1, wherein an image side surface curvature radius of the first lens is R2, and an object side surface curvature radius of the second lens is R3, and the following condition is satisfied: 2.4 < R2/R3 < 3.7. The wide-angle imaging lens set according to claim 1, wherein an image side surface curvature radius of the second lens is R4, and an object side surface curvature radius of the third lens is R5, and the following condition is satisfied: -1.55 < R4/R5 < -0.5. The wide-angle imaging lens set according to claim 1, wherein the first lens has a dispersion coefficient of V1, the second lens has a dispersion coefficient of V2, and satisfies the following condition: 30 < V1 - V2 < 42.