Optical image capturing lens assembly, imaging device and electronic device

Abstract

The invention provides an optical image capturing lens assembly. The optical image capturing lens assembly sequentially comprises a first lens, a second lens, a third lens and a fourth lens from an object side to an image side. The first lens element with positive refractive power has a convex object-side surface. The second lens element has refractive power. The third lens element has positive refractive power. The fourth lens element has negative refractive power. The total number of the lenses of the optical image capturing lens group is four. When the optical image capturing lens group meets specific conditions, the requirements of reducing the size and improving the imaging quality can be met.

Description

Technical Field

[0001] The present invention relates to an optical imaging device, and more particularly to an optical imaging lens assembly that can be used in common electronic devices, automotive electronic devices, or driving photography devices, as well as an imaging device and an electronic device having the optical imaging lens assembly. Background Art

[0002] Advances in semiconductor manufacturing technology have enabled the size of photosensitive components (such as CCD and CMOS image sensors) required for photographic devices to shrink, meeting the demands of miniaturized photographic devices. This has driven a trend in consumer electronics products to incorporate miniaturized cameras to enhance product value. For example, portable electronic devices like smartphones are increasingly being replaced by traditional digital cameras due to their portability. However, consumers' expectations for portable electronic devices are increasing, with demands for smaller size and lighter weight in addition to aesthetics. Therefore, miniaturized cameras incorporated into portable electronic devices must be further miniaturized to accommodate their installation in slimmer electronic products.

[0003] Given that consumers have increasingly higher requirements for image quality of imaging devices, especially clear image quality, how to provide an optical imaging device with good image quality and miniaturization to meet the needs of various photography occasions has become a problem that people in this technical field are eager to solve. Summary of the Invention

[0004] The present invention is directed to an optical imaging lens assembly, which can achieve the requirements of reducing volume and improving high imaging quality.

[0005] The present invention provides an optical imaging lens group, which sequentially includes a first lens, a second lens, a third lens, and a fourth lens along the optical axis from the object side to the image side. The first lens to the fourth lens each include an object side facing the object side and allowing light to pass through, and an image side facing the image side and allowing light to pass through. The first lens has a positive refractive power, and the object side of the first lens is a convex surface. The second lens has a refractive power. The third lens has a positive refractive power. The fourth lens has a negative refractive power. The object side and the image side of the second lens each have at least one inflection point. The image side of the third lens, the object side of the fourth lens, and the image side of the fourth lens each have at least one inflection point. Among them, the total number of lenses in the optical imaging lens group is four. The distance from the object side of the first lens to the imaging surface on the optical axis is TTL, the maximum image height of the optical imaging lens group is ImgH, the distance from the aperture of the optical imaging lens group to the imaging surface on the optical axis is STO_IMG, the distance from the image side of the second lens to the object side of the third lens on the optical axis is AT23, the effective radius of the image side of the fourth lens is D42, and the optical imaging lens group satisfies the following conditional expressions: 1.14 < TTL / ImgH < 1.34; 1.0 < STO_IMG / ImgH < 1.27; 0.105 < AT23 / ImgH < 0.14; and 0.13 < AT23 / D42 < 0.17.

[0006] In an embodiment of the present invention, the curvature radius of the object side of the above-mentioned third lens is R31, and the curvature radius of the image side of the above-mentioned third lens is R32. The optical imaging lens group further satisfies the following conditional expression: 1.7 < (R31 + R32) / (R31 - R32) < 2.1.

[0007] In an embodiment of the present invention, the distance from the above-mentioned aperture to the image side of the fourth lens on the optical axis is STO_P4R2, and the effective radius of the object side of the above-mentioned second lens is D21. The optical imaging lens group further satisfies the following conditional expression: 2.0 < STO_P4R2 / D21 < 2.7.

[0008] In an embodiment of the present invention, the distance from the above-mentioned aperture to the image side of the fourth lens on the optical axis is STO_P4R2, and the focal length of the optical imaging lens group is EFL. The optical imaging lens group further satisfies the following conditional expression: 0.57 < STO_P4R2 / EFL < 0.75.

[0009] In one embodiment of the present invention, the focal length of the optical imaging lens assembly is EFL, and the combined focal length of the first lens, the second lens, and the third lens is f123. The optical imaging lens assembly also satisfies the following conditional expression: 1.77 <EFL / f123<1.95。

[0010] In one embodiment of the present invention, the object-side surface of the third lens has a curvature radius of R31, and the image-side surface of the third lens has a curvature radius of R32. The optical imaging lens assembly further satisfies the following condition: 2.8<|R31 / R32|<3.8.

[0011] In one embodiment of the present invention, the object-side surface of the third lens has a curvature radius of R31, and an effective radius of D31, and the optical imaging lens assembly further satisfies the following condition: 2.06<|R31 / D31|<2.51.

[0012] In one embodiment of the present invention, the object-side surface of the second lens has a curvature radius of R21, and the combined focal length of the first lens and the second lens is f12. The optical imaging lens assembly further satisfies the following condition: 5.2<|R21 / f12|<18.

[0013] In one embodiment of the present invention, the curvature radius of the image-side surface of the second lens is R22, and the optical imaging lens assembly further satisfies the following condition: 37.7<|R22 / AT23|<56.

[0014] In one embodiment of the present invention, the combined focal length of the second lens and the third lens is f23, and the combined focal length of the first lens and the second lens is f12. The optical imaging lens assembly further satisfies the following condition: 0.45<|f23 / f12|<0.87.

[0015] In one embodiment of the present invention, the combined focal length of the second lens, the third lens, and the fourth lens is f234, and the focal length of the optical imaging lens assembly is EFL. The optical imaging lens assembly further satisfies the following condition: 5.05<|f234| / EFL<6.3.

[0016] In one embodiment of the present invention, the combined focal length of the second lens and the third lens is f23, and the distance from the object-side surface of the second lens to the image-side surface of the third lens on the optical axis is TT23. The optical imaging lens assembly further satisfies the following condition: 1.79<|f23 / TT23|<3.46.

[0017] In one embodiment of the present invention, the curvature radius of the image-side surface of the third lens is R32, and the effective radius of the image-side surface of the third lens is D32. The optical imaging lens assembly further satisfies the following condition: 0.4<|R32 / D32|<0.54.

[0018] In one embodiment of the present invention, the horizontal displacement distance on the optical axis from the intersection of the image-side surface of the third lens on the optical axis to the position of the maximum effective diameter of the image-side surface of the third lens is S32, and the effective radius of the object-side surface of the third lens is D31, and the optical imaging lens assembly further satisfies the following conditional expression: -0.59 <S32 / D31<-0.53。

[0019] In one embodiment of the present invention, the distance from the aperture to the image side surface of the fourth lens on the optical axis is STO_P4R2, and the optical imaging lens assembly further satisfies the following conditional expression: 0.85 <STO_P4R2 / D42<1。

[0020] In one embodiment of the present invention, the focal length of the optical imaging lens assembly is EFL, and the combined focal length of the first lens and the second lens is f12. The optical imaging lens assembly also satisfies the following conditional expression: 0.75 <EFL / f12<1.15。

[0021] In one embodiment of the present invention, the combined focal length of the second lens, the third lens, and the fourth lens is f234, the radius of curvature of the object-side surface of the second lens is R21, and the optical imaging lens assembly further satisfies the following condition: 3.54<|f234 / R21|<5.49.

[0022] In one embodiment of the present invention, the above-mentioned optical imaging lens assembly further satisfies the following conditional formula: 10.6 <TTL / AT23<13.72。

[0023] The present invention further provides an optical imaging lens assembly, comprising the above-mentioned optical imaging lens assembly and an image sensing component, wherein the image sensing component is disposed on the imaging surface of the optical imaging lens assembly.

[0024] The present invention further provides an electronic device including the imaging device as described above.

[0025] In order to make the above features and advantages of the present invention more clearly understood, embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of an optical imaging lens assembly and an imaging device according to a first embodiment of the present invention;

[0027] Figure 2 The astigmatism field curvature diagram, distortion diagram, and longitudinal spherical aberration diagram of the first embodiment;

[0028] Figure 3 A schematic diagram of an optical imaging lens assembly and an imaging device according to a second embodiment of the present invention;

[0029] Figure 4 Graphs of astigmatism field curvature, distortion, and longitudinal spherical aberration for the second embodiment;

[0030] Figure 5 A schematic diagram of an optical imaging lens assembly and an imaging device according to a third embodiment of the present invention;

[0031] Figure 6 Graphs showing astigmatism field curvature, distortion, and longitudinal spherical aberration of the third embodiment;

[0032] Figure 7 A schematic diagram of an optical imaging lens assembly and an imaging device according to a fourth embodiment of the present invention;

[0033] Figure 8 Graphs showing astigmatism field curvature, distortion, and longitudinal spherical aberration of the fourth embodiment;

[0034] Figure 9 A schematic diagram of an optical imaging lens assembly and an imaging device according to a fifth embodiment of the present invention;

[0035] Figure 10 Graphs showing astigmatism field curvature, distortion, and longitudinal spherical aberration of the fifth embodiment;

[0036] Figure 11 A schematic diagram of an optical imaging lens assembly and an imaging device according to a sixth embodiment of the present invention;

[0037] Figure 12 Graphs of astigmatism field curvature, distortion, and longitudinal spherical aberration for the sixth embodiment;

[0038] Figure 13 A schematic diagram of an optical imaging lens assembly and an imaging device according to a seventh embodiment of the present invention;

[0039] Figure 14 Graphs showing astigmatism field curvature, distortion, and longitudinal spherical aberration of the seventh embodiment;

[0040] Figure 15 is a schematic diagram of an optical imaging lens assembly and an imaging device according to an eighth embodiment of the present invention;

[0041] Figure 16 Graphs showing astigmatism field curvature, distortion, and longitudinal spherical aberration of the eighth embodiment;

[0042] Figure 17 FIG. 4 is a schematic diagram of an electronic device according to a ninth embodiment of the present invention.

[0043] Description of Reference Numerals

[0044] 10~80: Optical imaging lens group;

[0045] 11-81: first lens;

[0046] 12-82: Second lens;

[0047] 13-83: third lens;

[0048] 14-84: fourth lens;

[0049] 15~85: filter cover assembly;

[0050] 11a-15a, 21a-25a, 31a-35a, 41a-45a, 51a-55a, 61a-65a, 71a-75a, 81a-85a: side view of the object;

[0051] 11b-15b, 21b-25b, 31b-35b, 41b-45b, 51b-55b, 61b-65b, 71b-75b, 81b-85b: side views;

[0052] 16-86: imaging surface;

[0053] 100-800: Image sensor component;

[0054] I: optical axis;

[0055] ST: aperture. DETAILED DESCRIPTION

[0056] In the following embodiments, each lens of the optical imaging lens assembly can be made of glass or plastic, not limited to the materials listed in the examples. When the lens is made of glass, the lens surface can be processed by grinding or molding. Furthermore, due to the inherent temperature resistance and high hardness of glass, the effects of environmental changes on the optical imaging lens assembly can be reduced, thereby extending the service life of the optical imaging lens assembly. When the lens is made of plastic, the weight of the optical imaging lens assembly can be reduced, thereby lowering production costs.

[0057] In an embodiment of the present invention, each lens includes an object-side surface facing the subject and an image-side surface facing the imaging plane. The surface shape of each lens is defined based on the shape of the surface near the optical axis (paraxially). For example, when the object-side surface of a lens is described as convex, it means that the object-side surface of the lens near the optical axis is convex. That is, although the lens surface is described as convex in the embodiment, the surface may be convex or concave in the area away from the optical axis (off-axis). The shape of each lens at the paraxial position is determined by whether the radius of curvature of the surface is positive or negative. For example, if the radius of curvature of the object-side surface of a lens is positive, the object-side surface is convex. Conversely, if the radius of curvature is negative, the object-side surface is concave. With respect to the image-side surface of a lens, if the radius of curvature is positive, the image-side surface is concave. Conversely, if the radius of curvature is negative, the image-side surface is convex.

[0058] In embodiments of the present invention, the object-side and image-side surfaces of each lens may be spherical or aspherical. Using aspherical surfaces on lenses helps correct imaging aberrations in the optical imaging lens system, such as spherical aberration, and reduces the number of optical lens components used. Although some optical lenses in embodiments of the present invention utilize aspherical surfaces, they can be designed as spherical surfaces as needed.

[0059] In the embodiments of the present invention, the total track length (TTL) of the optical imaging lens assembly is defined as the distance from the object-side surface of the first lens of the optical imaging lens assembly to the imaging plane on the optical axis. The imaging height of the optical imaging lens assembly is referred to as the maximum image height (ImgH). When an image sensor is positioned on the imaging plane, the maximum image height represents half the diagonal length of the effective sensing area of the image sensor. In the following embodiments, all lens curvature radii, lens thicknesses, inter-lens distances, total lens assembly length, maximum image height, and focal length are expressed in millimeters (mm).

[0060] The present invention provides an optical imaging lens assembly, which comprises a first lens, a second lens, a third lens, and a fourth lens in order from the object side to the image side. The total number of lenses in the optical imaging lens assembly is four.

[0061] The first lens element has positive refractive power, and its object-side surface is convex to meet practical application requirements, thereby helping to shorten the overall length of the optical system. Preferably, the first lens element is made of plastic to reduce manufacturing costs and facilitate processing. In one embodiment of the present invention, the object-side surface and / or the image-side surface of the first lens element may be aspherical to improve spherical aberration and off-axis aberration.

[0062] The second lens has refractive power for converging light rays or helping to adjust the light path, thereby effectively sharing the refractive power of the first lens and reducing sensitivity. Both the object side and the image side of the second lens have at least one inflection point. Preferably, the material of the second lens is plastic to reduce manufacturing costs and facilitate processing. In addition, the object side or / and the image side of the second lens can be aspherical to improve spherical aberration and off-axis aberration.

[0063] The third lens has positive refractive power. Using the positive refractive power of the third lens helps to converge light rays and correct astigmatism aberration. The image side of the third lens has at least one inflection point. In an embodiment of the present invention, the material of the third lens is plastic to reduce manufacturing costs and facilitate processing. In an embodiment of the present invention, the object side or / and the image side of the fourth lens is aspherical to improve spherical aberration and off-axis aberration caused by a large field angle.

[0064] The fourth lens has negative refractive power. Using the negative refractive power of the fourth lens helps to adjust the light path. Both the object side and the image side of the fourth lens have at least one inflection point. Preferably, the material of the fourth lens is plastic to reduce manufacturing costs and facilitate processing. In an embodiment of the present invention, the object side or / and the image side of the fourth lens is aspherical to correct distortion and off-axis aberration and help adjust the angle of the chief ray incident on the imaging surface, which is helpful for the relative illumination of the image.

[0065] The distance from the object side of the first lens to the imaging surface on the optical axis is TTL, and the maximum image height of the optical imaging lens group is ImgH. The optical imaging lens group satisfies the following conditional formula: 1.14 < TTL / ImgH < 1.34 (1). When the relationship formula (1) is satisfied, the total optical length and the back focal length can be effectively reduced, achieving the characteristics of miniaturization and wide angle.

[0066] The distance from the aperture of the optical imaging lens group to the imaging surface on the optical axis is STO_IMG. The optical imaging lens group satisfies the following conditional formula: 1.0 < STO_IMG / ImgH < 1.27 (2). When the relationship formula (2) is satisfied, not only can the size of the optical imaging lens group be reduced, but the sensitivity of the optical system can also be balanced, and the generated aberration can be effectively corrected.

[0067] The distance from the image side of the second lens to the object side of the third lens on the optical axis is AT23. The optical imaging lens group satisfies the following conditional formula: 0.105 < AT23 / ImgH < 0.14 (3). When the relationship formula (3) is satisfied, the distance between the second lens and the third lens can be effectively controlled, and the total optical length can be reduced and the imaging quality can be improved.

[0068] The effective radius of the image side of the fourth lens is D42, and the optical imaging lens group satisfies the following conditional formula: 0.13 < AT23 / D42 < 0.17 (4). When the relational formula (4) is satisfied, the size of the fourth lens can be effectively reduced, which is beneficial to reducing the lens sensitivity and improving the imaging quality.

[0069] The radius of curvature of the object side of the third lens is R31, and the radius of curvature of the image side of the third lens is R32. The optical imaging lens group also satisfies the following conditional formula: 1.7 < (R31 + R32) / (R31 - R32) < 2.1 (5). When the relational formula (5) is satisfied, the aberration of the third lens in the optical system can be reduced, and the generation of stray light can be effectively reduced, improving the imaging quality.

[0070] The distance on the optical axis from the aperture to the image side of the fourth lens is STO_P4R2, and the effective radius of the object side of the second lens is D21. The optical imaging lens group also satisfies the following conditional formula: 2.0 < STO_P4R2 / D21 < 2.7 (6). When the relational formula (6) is satisfied, not only can the size of the optical imaging lens group be reduced, but the sensitivity of the second lens can be balanced, and the generated aberration can be effectively corrected.

[0071] The focal length of the optical imaging lens group is EFL, and the optical imaging lens group also satisfies the following conditional formula: 0.57 < STO_P4R2 / EFL < 0.75 (7). When the relational formula (7) is satisfied, the distance on the optical axis from the aperture to the fourth lens can be balanced, the spacing of the lenses can be effectively distributed, and the space can be effectively utilized.

[0072] The combined focal length of the first lens, the second lens and the third lens is f123, and the optical imaging lens group also satisfies the following conditional formula: 1.77 < EFL / f123 < 1.95 (8). When the relational formula (8) is satisfied, the dioptric power of the first lens, the second lens and the third lens and the system focal length can be balanced, and the sensitivity of the optical system can be effectively balanced.

[0073] The optical imaging lens group also satisfies the following conditional formula: 2.8 < |R31 / R32| < 3.8 (9). When the relational formula (9) is satisfied, the dioptric power of the third lens can be balanced, the lens shape can be prevented from being too curved, and the manufacturing yield can be improved.

[0074] The effective radius of the object side of the third lens is D31, and the optical imaging lens group also satisfies the following conditional formula: 2.06 < |R31 / D31| < 2.51 (10). When the relational formula (10) is satisfied, the surface shape of the object side of the third lens can be controlled, and the mirror surface sensitivity can be reduced.

[0075] The radius of curvature of the object side surface of the second lens is R21, and the combined focal length of the first lens and the second lens is f12. The optical imaging lens group further satisfies the following conditional formula: 5.2 < |R21 / f12| < 18 (11). When the relational formula (11) is satisfied, the refractive power of the first lens and the second lens can be effectively distributed, the system sensitivity can be controlled, and the process yield can be improved.

[0076] The horizontal displacement distance on the optical axis from the intersection of the object side surface of the second lens on the optical axis to the maximum effective diameter position of the object side surface of the second lens is S21, and the effective radius of the image side surface of the second lens is D22. The optical imaging lens group further satisfies the following conditional formula: -0.13 < S21 / D22 < -0.09 (12). When the relational formula (12) is satisfied, the surface shapes of the object side surface and the image side surface of the second lens can be balanced, the lens shape can be prevented from being too curved, and the process yield can be improved.

[0077] The optical imaging lens group further satisfies the following conditional formula: 37.7 < |R22 / AT23| < 56 (13). When the relational formula (13) is satisfied, the refractive power of the image side surface of the second lens can be effectively controlled, and the imaging quality can be improved.

[0078] The combined focal length of the second lens and the third lens is f23. The optical imaging lens group further satisfies the following conditional formula: 0.45 < |f23 / f12| < 0.87 (14). When the relational formula (14) is satisfied, the refractive powers of the first lens, the second lens and the third lens can be effectively distributed, the sensitivity of the optical system can be reduced, and the process yield can be improved.

[0079] The combined focal length of the second lens, the third lens and the fourth lens is f234. The optical imaging lens group further satisfies the following conditional formula: 5.05 < |f234| / EFL < 6.3 (15). When the relational formula (15) is satisfied, the refractive powers of the second lens, the third lens and the fourth lens and the optical system can be balanced, and the sensitivity of the system can be effectively balanced.

[0080] The distance on the optical axis from the object side surface of the second lens to the image side surface of the third lens is TT23. The optical imaging lens group further satisfies the following conditional formula: 1.79 < |f23 / TT23| < 3.46 (16). When the relational formula (16) is satisfied, the refractive powers and core thicknesses of the second lens and the third lens can be effectively distributed, and the total optical length and the lens sensitivity can be reduced.

[0081] The effective radius of the image side surface of the third lens is D32. The optical imaging lens group further satisfies the following conditional formula: 0.4 < |R32 / D32| < 0.54 (17). When the relational formula (17) is satisfied, the refractive power and the mirror size of the image side surface of the third lens can be controlled, the lens shape can be prevented from being too curved, and the process yield can be improved.

[0082] The horizontal displacement distance on the optical axis from the intersection of the image side surface of the third lens on the optical axis to the position of the maximum effective diameter of the image side surface of the third lens is S32, and the optical imaging lens group further satisfies the following conditional formula: -0.59 < S32 / D31 < -0.53 (18). When the relational formula (18) is satisfied, the mirror surface shapes of the object side surface and the image side surface of the third lens can be balanced, the lens shape can be prevented from being overly curved, and the manufacturing yield can be improved.

[0083] The optical imaging lens group further satisfies the following conditional formula: 0.85 < STO_P4R2 / D42 < 1 (19). When the relational formula (19) is satisfied, not only can the size of the optical system be limited, but the lens size of the fourth lens can also be controlled, and the imaging quality can be effectively improved.

[0084] The optical imaging lens group further satisfies the following conditional formula: 0.75 < EFL / f12 < 1.15 (20). When the relational formula (20) is satisfied, the refractive powers of the first lens, the second lens and the optical system can be balanced, and the sensitivity of the system can be effectively balanced.

[0085] The optical imaging lens group further satisfies the following conditional formula: 3.54 < |f234 / R21| < 5.49 (21). When the relational formula (21) is satisfied, the refractive power of the second lens can be effectively distributed, the system sensitivity can be controlled, and the manufacturing yield can be improved.

[0086] The optical imaging lens group further satisfies the following conditional formula: 10.6 < TTL / AT23 < 13.72 (22). When the relational formula (22) is satisfied, the distance between the second lens and the third lens can be effectively controlled, and the total optical length can be reduced and the imaging quality can be improved.

[0087] First Embodiment

[0088] Please refer to Figure 1 and Figure 2 , Figure 1 which are schematic diagrams of the optical imaging lens group and the imaging device according to the first embodiment of the present invention, Figure 2 and are the astigmatism field curvature diagram, distortion diagram and longitudinal spherical aberration diagram of the first embodiment. As Figure 1 shown, the optical imaging lens group 10 of the first embodiment sequentially includes an aperture ST, a first lens 11, a second lens 12, a third lens 13 and a fourth lens 14 from the object side to the image side. This optical imaging lens group 10 may further include a filter cover assembly 15 and an imaging surface 16, wherein the filter cover assembly 15 may include a filter component (not shown in the figure) and a protective glass (not shown in the figure). An image sensing component 100 may also be disposed on the imaging surface 16 to form an imaging device (not separately labeled).

[0089] The first lens 11 has positive refractive power. Its object-side surface 11a is convex, and its image-side surface 11b is concave. Both the object-side surface 11a and the image-side surface 11b are aspherical. Both the object-side surface 11a and the image-side surface 11b have at least one inflection point off-axis. The material of the first lens 11 includes, but is not limited to, plastic.

[0090] The second lens element 12 has negative refractive power. Its object-side surface 12a is concave, and its image-side surface 12b is convex. Both the object-side surface 12a and the image-side surface 12b are aspherical. Both the object-side surface 12a and the image-side surface 12b have at least one inflection point off-axis. The material of the second lens element 12 includes, but is not limited to, plastic.

[0091] The third lens element 13 has positive refractive power. Its object-side surface 13a is concave, and its image-side surface 13b is convex. Both the object-side surface 13a and the image-side surface 13b are aspherical. Both the object-side surface 13a and the image-side surface 13b have at least one inflection point off-axis. The material of the third lens element 13 includes, but is not limited to, plastic.

[0092] The fourth lens element 14 has negative refractive power. Its object-side surface 14a is convex, and its image-side surface 14b is concave. Both the object-side surface 14a and the image-side surface 14b are aspherical. Both the object-side surface 14a and the image-side surface 14b have at least one inflection point off-axis. The fourth lens element 14 is made of, but not limited to, plastic.

[0093] The filter cover assembly 15 is disposed between the fourth lens 14 and the imaging surface 16 to filter out light of a specific wavelength range, such as an infrared light filter. The two surfaces 15a and 15b of the filter cover assembly 15 are both flat and made of glass.

[0094] The image sensor element 100 is, for example, a charge-coupled device (CCD) image sensor or a complementary metal oxide semiconductor (CMOS) image sensor.

[0095] The curve equations of the above-mentioned aspheric surfaces are expressed as follows:

[0096]

[0097] in,

[0098] X: The distance between the point on the aspheric surface that is Y away from the optical axis and the tangent plane of the aspheric surface on the optical axis;

[0099] Y: the vertical distance between a point on the aspheric surface and the optical axis;

[0100] C: The reciprocal of the radius of curvature of the lens at the near optical axis;

[0101] K: cone coefficient; and

[0102] Ai: i-th order aspheric coefficient, where I = 2x, and x is a natural number greater than or equal to 2, that is, i is an even number greater than or equal to 4.

[0103] Please refer to Table 1 below, which shows the detailed optical data of the optical imaging lens assembly 10 according to the first embodiment of the present invention. The object-side surface 11a of the first lens 11 is labeled as surface 11a, the image-side surface 11b is labeled as surface 11b, and the same applies to the other lens surfaces. The values in the distance fields in the table represent the distance from one surface to the next surface on the optical axis I. For example, the distance from the object-side surface 11a to the image-side surface 11b of the first lens 11 is 0.266 mm, indicating that the thickness of the first lens 11 is 0.266 mm. The distance from the image-side surface 11b of the first lens 11 to the object-side surface 12a of the second lens 12 is 0.213 mm. The same applies to other parameters, which will not be repeated below. In the first embodiment, the effective focal length of the optical imaging lens assembly 10 is EFL, the aperture value (F-number) is Fno, and half the maximum viewing angle of the entire optical imaging lens assembly 10 is HFOV (Half Field of View), the values of which are also listed in Table 1.

[0104] Table 1

[0105]

[0106] Please refer to Table 2 below, which shows the aspheric coefficients of the lens surfaces of the first embodiment of the present invention. K is the cone coefficient in the aspheric curve equation, A4 to A 16 represents the 4th to 16th order aspheric coefficients of each surface. For example, the cone coefficient K of the object-side surface 12a of the second lens 12 is 56.547. Other values can be deduced similarly and are not repeated here. Furthermore, the tables in the following embodiments correspond to the optical imaging lens assemblies of the respective embodiments. The definitions in each table are the same as those in the present embodiment and are therefore not repeated here.

[0107] Table 2

[0108]

[0109] In the first embodiment, the values of the various equations of the optical imaging lens assembly 10 are listed in Table 3. As can be seen from Table 3, the optical imaging lens assembly 10 of the first embodiment meets the requirements of equations (1) to (22).

[0110] Table 3

[0111]

[0112]

[0113] Second embodiment

[0114] Please refer to Figure 3 and Figure 4 , Figure 3 Schematic diagram of an optical imaging lens assembly and an imaging device according to a second embodiment of the present invention. Figure 4 : The astigmatism field curvature diagram, distortion diagram and longitudinal spherical aberration diagram of the second embodiment. Figure 3 As shown, the optical imaging lens assembly 20 of the second embodiment includes, from the object side to the image side, a first lens 21, an aperture ST, a second lens 22, a third lens 23, and a fourth lens 24. This optical imaging lens assembly 20 may also include a filter cover assembly 25 and an imaging surface 26. The filter cover assembly 25 may include a filter element (not shown) and a protective glass (not shown). An image sensor element 200 may also be disposed on the imaging surface 26 to form an imaging device (not separately labeled).

[0115] The first lens 21 has positive refractive power. Its object-side surface 21a is convex, and its image-side surface 21b is concave. Both the object-side surface 21a and the image-side surface 21b are aspherical. Both the object-side surface 21a and the image-side surface 21b have at least one inflection point off-axis. The material of the first lens 21 includes, but is not limited to, plastic.

[0116] The second lens element 22 has negative refractive power. Its object-side surface 22a is concave, and its image-side surface 22b is concave. Both the object-side surface 22a and the image-side surface 22b are aspherical. Both the object-side surface 22a and the image-side surface 22b have at least one inflection point at an off-axis position. The material of the second lens element 22 includes, but is not limited to, plastic.

[0117] The third lens element 23 has positive refractive power. Its object-side surface 23a is concave, and its image-side surface 23b is convex. Both the object-side surface 23a and the image-side surface 23b are aspherical. Both the object-side surface 23a and the image-side surface 23b have at least one inflection point off-axis. The material of the third lens element 23 includes, but is not limited to, plastic.

[0118] The fourth lens element 24 has negative refractive power. Its object-side surface 24a is convex, and its image-side surface 24b is concave. Both the object-side surface 24a and the image-side surface 24b are aspherical. Both the object-side surface 24a and the image-side surface 24b have at least one inflection point off-axis. The fourth lens element 24 is made of, but not limited to, plastic.

[0119] The filter cover assembly 25 is disposed between the fourth lens 24 and the imaging surface 26 to filter out light of a specific wavelength range, such as an infrared light filter. The two surfaces 25a and 25b of the filter cover assembly 25 are both flat and made of glass.

[0120] The image sensor component 200 is, for example, a charge-coupled device (CCD) image sensor or a complementary metal oxide semiconductor (CMOS) image sensor.

[0121] Detailed optical data and aspheric coefficients of the lens surface of the second embodiment of the optical imaging lens assembly 20 are listed in Table 4 and Table 5. In the second embodiment, the curve equation of the aspheric surface is expressed in the same form as that of the first embodiment.

[0122] Table 4

[0123]

[0124] Table 5

[0125]

[0126]

[0127] In the second embodiment, the values of the various equations of the optical imaging lens assembly 20 are listed in Table 6. As can be seen from Table 6, the optical imaging lens assembly 20 of the second embodiment meets the requirements of equations (1) to (22).

[0128] Table 6

[0129]

[0130] Third embodiment

[0131] Please refer to Figure 5 and Figure 6 , Figure 5 Schematic diagram of an optical imaging lens assembly and an imaging device according to a third embodiment of the present invention. Figure 6 : The astigmatism field curvature diagram, distortion diagram and longitudinal spherical aberration diagram of the third embodiment. Figure 5 As shown, the optical imaging lens assembly 30 of the third embodiment includes, from the object side to the image side, a first lens 31, an aperture ST, a second lens 32, a third lens 33, and a fourth lens 34. This optical imaging lens assembly 30 may also include a filter cover assembly 35 and an imaging surface 36. The filter cover assembly 35 may include a filter element (not shown) and a protective glass (not shown). An image sensor element 300 may also be disposed on the imaging surface 36 to form an imaging device (not separately labeled).

[0132] The first lens 31 has positive refractive power. Its object-side surface 31a is convex, and its image-side surface 31b is concave. Both the object-side surface 31a and the image-side surface 31b are aspherical. Both the object-side surface 31a and the image-side surface 31b have at least one inflection point off-axis. The material of the first lens 31 includes, but is not limited to, plastic.

[0133] The second lens element 32 has negative refractive power. Its object-side surface 32a is concave, and its image-side surface 32b is concave. Both the object-side surface 32a and the image-side surface 32b are aspherical. Both the object-side surface 32a and the image-side surface 32b have at least one inflection point at an off-axis position. The material of the second lens element 32 includes, but is not limited to, plastic.

[0134] The third lens element 33 has positive refractive power. Its object-side surface 33a is concave, and its image-side surface 33b is convex. Both the object-side surface 33a and the image-side surface 33b are aspherical. Both the object-side surface 33a and the image-side surface 33b have at least one inflection point at an off-axis position. The material of the third lens element 33 includes, but is not limited to, plastic.

[0135] The fourth lens element 34 has negative refractive power. Its object-side surface 34a is convex, and its image-side surface 34b is concave. Both the object-side surface 34a and the image-side surface 34b are aspherical. Both the object-side surface 34a and the image-side surface 34b have at least one inflection point at an off-axis position. The fourth lens element 34 is made of, but is not limited to, plastic.

[0136] The filter cover component 35 is disposed between the fourth lens 34 and the imaging surface 36 to filter out light of a specific wavelength range, such as an infrared light filter component. The two surfaces 35a and 35b of the filter cover component 35 are both flat and made of glass.

[0137] The image sensor element 300 is, for example, a charge-coupled device (CCD) image sensor or a complementary metal oxide semiconductor (CMOS) image sensor.

[0138] Detailed optical data and aspheric coefficients of the lens surface of the third embodiment of the optical imaging lens assembly 30 are listed in Table 7 and Table 8. In the third embodiment, the curve equation of the aspheric surface is expressed in the same form as that of the first embodiment.

[0139] Table 7

[0140]

[0141] Table 8

[0142]

[0143] In the third embodiment, the values of the various equations of the optical imaging lens assembly 30 are listed in Table 9. As can be seen from Table 9, the optical imaging lens assembly 30 of the third embodiment meets the requirements of equations (1) to (22).

[0144] Table 9

[0145]

[0146] Fourth embodiment

[0147] Please refer to Figure 7 and Figure 8 , Figure 7 Schematic diagram of an optical imaging lens assembly and an imaging device according to a fourth embodiment of the present invention. Figure 8 : The astigmatism field curvature diagram, distortion diagram and longitudinal spherical aberration diagram of the fourth embodiment. Figure 7 As shown, the optical imaging lens assembly 40 of the fourth embodiment includes, from the object side to the image side, an aperture ST, a first lens 41, a second lens 42, a third lens 43, and a fourth lens 44. This optical imaging lens assembly 40 may also include a filter cover assembly 45 and an imaging surface 46. The filter cover assembly 45 may include a filter element (not shown) and a protective glass (not shown). An image sensor element 400 may also be disposed on the imaging surface 46 to form an imaging device (not separately labeled).

[0148] The first lens 41 has positive refractive power. Its object-side surface 41a is convex, and its image-side surface 41b is concave. Both the object-side surface 41a and the image-side surface 41b are aspherical, and its image-side surface 41b has at least one inflection point off-axis. The material of the first lens 41 includes, but is not limited to, plastic.

[0149] The second lens element 42 has positive refractive power. Its object-side surface 42a is concave, and its image-side surface 42b is convex. Both the object-side surface 42a and the image-side surface 42b are aspherical. Both the object-side surface 42a and the image-side surface 42b have at least one inflection point at an off-axis position. The material of the second lens element 42 includes, but is not limited to, plastic.

[0150] The third lens element 43 has positive refractive power. Its object-side surface 43a is concave, and its image-side surface 43b is convex. Both the object-side surface 43a and the image-side surface 43b are aspherical. Both the object-side surface 43a and the image-side surface 43b have at least one inflection point at an off-axis position. The material of the third lens element 43 includes, but is not limited to, plastic.

[0151] The fourth lens element 44 has negative refractive power. Its object-side surface 44a is concave, and its image-side surface 44b is concave. Both the object-side surface 44a and the image-side surface 44b are aspherical. Both the object-side surface 44a and the image-side surface 44b have at least one inflection point off-axis. The fourth lens element 44 is made of, but not limited to, plastic.

[0152] The filter cover assembly 45 is disposed between the fourth lens 44 and the imaging surface 46 to filter out light of a specific wavelength range, such as an infrared light filter. The two surfaces 45a and 45b of the filter cover assembly 45 are both flat and made of glass.

[0153] The image sensor element 400 is, for example, a charge-coupled device (CCD) image sensor or a complementary metal oxide semiconductor (CMOS) image sensor.

[0154] Detailed optical data and aspheric coefficients of the lens surface of the fourth embodiment of the optical imaging lens assembly 40 are listed in Table 10 and Table 11, respectively. In the fourth embodiment, the curve equation of the aspheric surface is expressed in the same form as that of the first embodiment.

[0155] Table 10

[0156]

[0157]

[0158] Table 11

[0159]

[0160] In the fourth embodiment, the values of the various equations of the optical imaging lens assembly 40 are listed in Table 12. As can be seen from Table 12, the optical imaging lens assembly 40 of the fourth embodiment meets the requirements of equations (1) to (22).

[0161] Table 12

[0162]

[0163]

[0164] Fifth embodiment

[0165] Please refer to Figure 9 and Figure 10 , Figure 9 Schematic diagram of an optical imaging lens assembly and an imaging device according to a fifth embodiment of the present invention. Figure 10 : The astigmatism field curvature diagram, distortion diagram and longitudinal spherical aberration diagram of the fifth embodiment. Figure 9 As shown, the optical imaging lens assembly 50 of the fifth embodiment includes, from the object side to the image side, an aperture ST, a first lens 51, a second lens 52, a third lens 53, and a fourth lens 54. This optical imaging lens assembly 50 may also include a filter cover assembly 55 and an imaging surface 56. The filter cover assembly 55 may include a filter element (not shown) and a protective glass (not shown). An image sensor element 500 may also be disposed on the imaging surface 56 to form an imaging device (not separately labeled).

[0166] The first lens 51 has positive refractive power. Its object-side surface 51a is convex, and its image-side surface 51b is concave. Both the object-side surface 51a and the image-side surface 51b are aspherical. Both the object-side surface 51a and the image-side surface 51b have at least one inflection point off-axis. The material of the first lens 51 includes, but is not limited to, plastic.

[0167] The second lens element 52 has negative refractive power. Its object-side surface 52a is concave, and its image-side surface 52b is convex. Both the object-side surface 52a and the image-side surface 52b are aspherical. Both the object-side surface 52a and the image-side surface 52b have at least one inflection point at an off-axis position. The material of the second lens element 52 includes, but is not limited to, plastic.

[0168] The third lens element 53 has positive refractive power. Its object-side surface 53a is concave, and its image-side surface 53b is convex. Both the object-side surface 53a and the image-side surface 53b are aspherical. Its image-side surface 33b has at least one inflection point off-axis. The material of the third lens element 53 includes, but is not limited to, plastic.

[0169] The fourth lens element 54 has negative refractive power. Its object-side surface 54a is concave, and its image-side surface 54b is concave. Both the object-side surface 54a and the image-side surface 54b are aspherical. Both the object-side surface 54a and the image-side surface 54b have at least one inflection point off-axis. The fourth lens element 54 is made of, but not limited to, plastic.

[0170] The filter cover assembly 55 is disposed between the fourth lens 54 and the imaging surface 56 to filter out light of a specific wavelength range, such as an infrared light filter. The two surfaces 55a and 55b of the filter cover assembly 55 are both flat and made of glass.

[0171] The image sensor element 500 is, for example, a charge-coupled device (CCD) image sensor or a complementary metal oxide semiconductor (CMOS) image sensor.

[0172] Detailed optical data and aspheric coefficients of the lens surface of the fifth embodiment of the optical imaging lens assembly 50 are listed in Table 13 and Table 14, respectively. In the fifth embodiment, the curve equation of the aspheric surface is expressed in the same form as that of the first embodiment.

[0173] Table 13

[0174]

[0175] Table 14

[0176]

[0177] In the fifth embodiment, the values of the various equations of the optical imaging lens assembly 50 are listed in Table 15. As can be seen from Table 15, the optical imaging lens assembly 50 of the fifth embodiment meets the requirements of equations (1) to (22).

[0178] Table 15

[0179]

[0180]

[0181] Sixth embodiment

[0182] Please refer to Figure 11 and Figure 12 , Figure 11 Schematic diagram of an optical imaging lens assembly and an imaging device according to a sixth embodiment of the present invention. Figure 12 : The astigmatism field curvature diagram, distortion diagram and longitudinal spherical aberration diagram of the sixth embodiment. Figure 11 As shown, the optical imaging lens assembly 60 of the sixth embodiment includes, from the object side to the image side, an aperture ST, a first lens 61, a second lens 62, a third lens 63, and a fourth lens 64. This optical imaging lens assembly 60 may also include a filter cover assembly 65 and an imaging surface 66. The filter cover assembly 65 may include a filter element (not shown) and a protective glass (not shown). An image sensor element 600 may also be disposed on the imaging surface 66 to form an imaging device (not separately labeled).

[0183] The first lens 61 has positive refractive power. Its object-side surface 61a is convex, and its image-side surface 61b is concave. Both the object-side surface 61a and the image-side surface 61b are aspherical. The object-side surface 61a has at least one inflection point off-axis. The material of the first lens 61 includes, but is not limited to, plastic.

[0184] The second lens 62 has negative refractive power. Its object-side surface 62a is concave, and its image-side surface 62b is convex. Both the object-side surface 62a and the image-side surface 62b are aspherical. Both the object-side surface 62a and the image-side surface 62b have at least one inflection point off-axis. The material of the second lens 62 includes, but is not limited to, plastic.

[0185] The third lens 63 has positive refractive power. Its object-side surface 63a is concave, and its image-side surface 63b is convex. Both the object-side surface 63a and the image-side surface 63b are aspherical. The image-side surface 63b has at least one inflection point off-axis. The material of the third lens 63 includes, but is not limited to, plastic.

[0186] The fourth lens element 64 has negative refractive power. Its object-side surface 64a is convex, and its image-side surface 64b is concave. Both the object-side surface 64a and the image-side surface 64b are aspherical. Both the object-side surface 64a and the image-side surface 64b have at least one inflection point off-axis. The fourth lens element 64 is made of, but not limited to, plastic.

[0187] The filter cover assembly 65 is disposed between the fourth lens 64 and the imaging surface 66 to filter out light of a specific wavelength range, such as an infrared light filter. The two surfaces 65a and 65b of the filter cover assembly 65 are both flat and made of glass.

[0188] The image sensor element 600 is, for example, a charge-coupled device (CCD) image sensor or a complementary metal oxide semiconductor (CMOS) image sensor.

[0189] Detailed optical data and aspheric coefficients of the lens surface of the sixth embodiment of the optical imaging lens assembly 60 are listed in Table 16 and Table 17. In the sixth embodiment, the curve equation of the aspheric surface is expressed in the same form as that of the first embodiment.

[0190] Table 16

[0191]

[0192] Table 17

[0193]

[0194]

[0195] In the sixth embodiment, the values of the various equations of the optical imaging lens assembly 60 are listed in Table 18. As can be seen from Table 18, the optical imaging lens assembly 60 of the sixth embodiment meets the requirements of equations (1) to (22).

[0196] Table 18

[0197]

[0198]

[0199] Seventh embodiment

[0200] Please refer to Figure 13 and Figure 14 , Figure 13 Schematic diagram of an optical imaging lens assembly and an imaging device according to a seventh embodiment of the present invention. Figure 14 : The astigmatism field curvature diagram, distortion diagram and longitudinal spherical aberration diagram of the seventh embodiment. Figure 13As shown, the optical imaging lens assembly 70 of the seventh embodiment includes, from the object side to the image side, an aperture ST, a first lens 71, a second lens 72, a third lens 73, and a fourth lens 74. This optical imaging lens assembly 70 may also include a filter cover assembly 75 and an imaging surface 76. The filter cover assembly 75 may include a filter element (not shown) and a protective glass (not shown). An image sensor element 700 may also be disposed on the imaging surface 77 to form an imaging device (not separately labeled).

[0201] The first lens 71 has positive refractive power. Its object-side surface 71a is convex, and its image-side surface 71b is concave. Both the object-side surface 71a and the image-side surface 71b are aspherical. Both the object-side surface 71a and the image-side surface 71b have at least one inflection point off-axis. The material of the first lens 71 includes, but is not limited to, plastic.

[0202] The second lens element 72 has negative refractive power. Its object-side surface 72a is concave, and its image-side surface 72b is convex. Both the object-side surface 72a and the image-side surface 72b are aspherical. Both the object-side surface 72a and the image-side surface 72b have at least one inflection point off-axis. The material of the second lens element 72 includes, but is not limited to, plastic.

[0203] The third lens element 73 has positive refractive power. Its object-side surface 73a is concave, and its image-side surface 73b is convex. Both the object-side surface 73a and the image-side surface 73b are aspherical. Its image-side surface 33b has at least one inflection point at an off-axis position. The material of the third lens element 73 includes, but is not limited to, plastic.

[0204] The fourth lens element 74 has negative refractive power. Its object-side surface 74a is convex, and its image-side surface 74b is concave. Both the object-side surface 74a and the image-side surface 74b are aspherical. Both the object-side surface 74a and the image-side surface 74b have at least one inflection point off-axis. The fourth lens element 74 is made of, but not limited to, plastic.

[0205] The filter cover assembly 75 is disposed between the fourth lens 74 and the imaging surface 76 to filter out light of a specific wavelength range, such as an infrared light filter. The two surfaces 75a and 75b of the filter cover assembly 75 are both flat and made of glass.

[0206] The image sensor element 700 is, for example, a charge-coupled device (CCD) image sensor or a complementary metal oxide semiconductor (CMOS) image sensor.

[0207] Detailed optical data and aspheric coefficients of the lens surface of the seventh embodiment of the optical imaging lens assembly 70 are listed in Table 19 and Table 20, respectively. In the seventh embodiment, the curve equation of the aspheric surface is expressed in the same form as in the first embodiment.

[0208] Table 19

[0209]

[0210] Table 20

[0211]

[0212] In the seventh embodiment, the values of the various equations of the optical imaging lens assembly 70 are listed in Table 21. As can be seen from Table 21, the optical imaging lens assembly 70 of the seventh embodiment meets the requirements of equations (1) to (22).

[0213] Table 21

[0214]

[0215] Eighth embodiment

[0216] Please refer to Figure 15 and Figure 16 , Figure 15 Schematic diagram of an optical imaging lens assembly and an imaging device according to an eighth embodiment of the present invention. Figure 16 : The astigmatism field curvature diagram, distortion diagram and longitudinal spherical aberration diagram of the eighth embodiment. Figure 15 As shown, the optical imaging lens assembly 80 of the eighth embodiment includes, from the object side to the image side, an aperture ST, a first lens 81, a second lens 82, a third lens 83, and a fourth lens 84. This optical imaging lens assembly 80 may also include a filter cover assembly 85 and an imaging surface 86. The filter cover assembly 85 may include a filter element (not shown) and a protective glass (not shown). An image sensor element 800 may also be disposed on the imaging surface 87 to form an imaging device (not separately labeled).

[0217] The first lens 81 has positive refractive power. Its object-side surface 81a is convex, and its image-side surface 81b is concave. Both the object-side surface 81a and the image-side surface 81b are aspherical. Both the object-side surface 81a and the image-side surface 81b have at least one inflection point off-axis. The material of the first lens 81 includes, but is not limited to, plastic.

[0218] The second lens element 82 has negative refractive power. Its object-side surface 82a is concave, and its image-side surface 82b is convex. Both the object-side surface 82a and the image-side surface 82b are aspherical. Both the object-side surface 82a and the image-side surface 82b have at least one inflection point off-axis. The material of the second lens element 82 includes, but is not limited to, plastic.

[0219] The third lens element 83 has positive refractive power. Its object-side surface 83a is concave, and its image-side surface 83b is convex. Both the object-side surface 83a and the image-side surface 83b are aspherical. The image-side surface 83b has at least one inflection point off-axis. The material of the third lens element 83 includes, but is not limited to, plastic.

[0220] The fourth lens element 84 has negative refractive power. Its object-side surface 84a is convex, and its image-side surface 84b is concave. Both the object-side surface 84a and the image-side surface 84b are aspherical. Both the object-side surface 84a and the image-side surface 84b have at least one inflection point off-axis. The material of the fourth lens element 84 includes, but is not limited to, plastic.

[0221] The filter cover assembly 85 is disposed between the fourth lens 84 and the imaging surface 86 to filter out light of a specific wavelength range, such as an infrared light filter assembly. The two surfaces 85a and 85b of the filter cover assembly 85 are both flat and made of glass.

[0222] The image sensor element 800 is, for example, a charge-coupled device (CCD) image sensor or a complementary metal oxide semiconductor (CMOS) image sensor.

[0223] Detailed optical data and aspheric coefficients of the lens surface of the eighth embodiment of the optical imaging lens assembly 80 are listed in Table 22 and Table 23. In the eighth embodiment, the curve equation of the aspheric surface is expressed in the same form as that of the first embodiment.

[0224] Table 22

[0225]

[0226]

[0227] Table 23

[0228]

[0229] In the eighth embodiment, the values of the various equations of the optical imaging lens assembly 80 are listed in Table 24. As can be seen from Table 24, the optical imaging lens assembly 80 of the eighth embodiment meets the requirements of equations (1) to (22).

[0230] Table 24

[0231]

[0232]

[0233] Ninth embodiment

[0234] Figure 17 This is a schematic diagram of an electronic device according to a ninth embodiment of the present invention. Figure 17 Imaging device 1010 includes the optical imaging lens assembly 10-80 and image sensor components 100-800 described in the first to eighth embodiments. Image sensor components 100-800 are disposed on imaging surfaces 17-87 of the optical imaging lens assembly 10-80. Image sensor components 100-800 may be, for example, charge-coupled devices (CCDs) or complementary metal oxide semiconductor (CMOS) image sensor components.

[0235] exist Figure 17 In the ninth embodiment of the present invention, the electronic device 1000 includes an imaging device 1010, wherein the electronic device 1000 can be applied to general 3C products and other electronic products with imaging functions.

[0236] While the present invention is illustrated using several embodiments described above, these embodiments are not intended to limit the scope of the invention. Anyone skilled in the art will appreciate that various variations in form and detail may be made to the embodiments disclosed herein without departing from the spirit and scope of the invention. Therefore, it should be understood that the present invention is defined by the following claims, and any variations made within the claims or their equivalents shall still fall within the scope of the present invention.

Claims

1. An optical imaging lens assembly, characterized in that: The optical imaging lens group sequentially includes a first lens, a second lens, a third lens, and a fourth lens along the optical axis from the object side to the image side, and each of the first lens to the fourth lens includes an object side facing the object side and allowing light to pass through and an image side facing the image side and allowing light to pass through; The first lens has a positive refractive power, and the object side of the first lens is a convex surface; The second lens has a refractive power; The third lens has a positive refractive power; and The fourth lens has a negative refractive power; Wherein, at least one inflection point exists on both the object side of the second lens and the image side of the second lens; At least one inflection point exists on the image side of the third lens, the object side of the fourth lens, and the image side of the fourth lens; Wherein, the total number of lenses in the optical imaging lens group is four. The distance from the object side of the first lens to the imaging surface on the optical axis is TTL, the maximum image height of the optical imaging lens group is ImgH, the distance from the aperture of the optical imaging lens group to the imaging surface on the optical axis is STO_IMG, the distance from the image side of the second lens to the object side of the third lens on the optical axis is AT23, the effective radius of the image side of the fourth lens is D42, and the optical imaging lens group satisfies the following conditional expressions: 1.14 < TTL / ImgH < 1.34; 1.0 < STO_IMG / ImgH < 1.27; 0.105 < AT23 / ImgH < 0.14; and 0.13 < AT23 / D42 < 0.

17.

2. The optical imaging lens assembly according to claim 1, wherein: The radius of curvature of the object side of the third lens is R31, and the radius of curvature of the image side of the third lens is R32. The optical imaging lens group also satisfies the following conditional expression: 1.7 < (R31 + R32) / (R31 - R32) < 2.

1.

3. The optical imaging lens assembly according to claim 1, wherein: The distance from the aperture to the image side of the fourth lens on the optical axis is STO_P4R2, and the effective radius of the object side of the second lens is D21. The optical imaging lens group also satisfies the following conditional expression: 2.0 < STO_P4R2 / D21 < 2.

7.

4. The optical imaging lens assembly according to claim 1, wherein: The distance from the aperture to the image side of the fourth lens on the optical axis is STO_P 5. The optical imaging lens assembly according to claim 1, wherein: ​ 6. The optical imaging lens assembly according to claim 1, wherein: ​ 7. The optical imaging lens assembly according to claim 1, wherein: The object-side surface of the third lens has a curvature radius of R31, and an effective radius of D31. The optical imaging lens assembly further satisfies the following condition: 2.06<|R31 / D31|<2.

51.

8. The optical imaging lens assembly according to claim 1, wherein: The object-side surface of the second lens has a curvature radius of R21, and the combined focal length of the first lens and the second lens is f12. The optical imaging lens assembly further satisfies the following condition: 5.2<|R21 / f12|<18.

9. The optical imaging lens assembly according to claim 1, wherein: The horizontal displacement distance on the optical axis from the intersection of the object side surface of the second lens on the optical axis to the maximum effective diameter position of the object side surface of the second lens is S21, and the effective radius of the image side surface of the second lens is D22. The optical imaging lens assembly also satisfies the following conditional formula: -0.13 <S21 / D22<-0.09。 10. The optical imaging lens assembly according to claim 1, wherein: The curvature radius of the image-side surface of the second lens is R22, and the optical imaging lens assembly further satisfies the following conditional expression: 37.7<|R22 / AT23|<56.

11. The optical imaging lens assembly according to claim 1, wherein: The combined focal length of the second lens and the third lens is f23, and the combined focal length of the first lens and the second lens is f12. The optical imaging lens assembly further satisfies the following condition: 0.45<|f23 / f12|<0.

87.

12. The optical imaging lens assembly according to claim 1, wherein: The combined focal length of the second lens, the third lens, and the fourth lens is f234, and the focal length of the optical imaging lens group is EFL. The optical imaging lens group further satisfies the following condition: 5.05<|f234| / EFL<6.

3.

13. The optical imaging lens assembly according to claim 1, wherein: The combined focal length of the second lens and the third lens is f23, and the distance from the object-side surface of the second lens to the image-side surface of the third lens on the optical axis is TT23. The optical imaging lens assembly further satisfies the following conditional expression: 1.79<|f23 / TT23|<3.

46.

14. The optical imaging lens assembly according to claim 1, wherein: The curvature radius of the image-side surface of the third lens is R32, and the effective radius of the image-side surface of the third lens is D32. The optical imaging lens assembly further satisfies the following condition: 0.4<|R32 / D32|<0.

54.

15. The optical imaging lens assembly according to claim 1, wherein: The horizontal displacement distance on the optical axis from the intersection of the image side surface of the third lens on the optical axis to the maximum effective diameter position of the image side surface of the third lens is S32, and the effective radius of the object side surface of the third lens is D31. The optical imaging lens assembly also satisfies the following conditional formula: -0.59 <S32 / D31<-0.53。 16. The optical imaging lens assembly according to claim 1, wherein: The distance between the aperture and the image side surface of the fourth lens on the optical axis is STO_P4R2, and the optical imaging lens group also satisfies the following conditional formula: 0.85 <STO_P4R2 / D42<1。 17. The optical imaging lens assembly according to claim 1, wherein: The focal length of the optical imaging lens group is EFL, and the combined focal length of the first lens and the second lens is f12. The optical imaging lens group also satisfies the following conditional expression: 0.75 <EFL / f12<1.15。 18. The optical imaging lens assembly according to claim 1, wherein a combined focal length of the second lens, the third lens, and the fourth lens is f234, a radius of curvature of the object-side surface of the second lens is R21, and the optical imaging lens assembly further satisfies the following condition: 3.54<|f234 / R21|<5.

49.

19. The optical imaging lens assembly according to claim 1, wherein: The optical imaging lens assembly also satisfies the following conditional formula: 10.6 <TTL / AT23<13.72。 20. An imaging device, characterized in that: The optical imaging lens assembly comprises the optical imaging lens assembly according to claim 1 and an image sensing component, wherein the image sensing component is disposed on the imaging surface of the optical imaging lens assembly.

21. An electronic device, characterized in that: Comprising the imaging device according to claim 20.

Images