Image capturing optical system lens, image capturing device and electronic device

Abstract

An image capturing optical system lens includes four lenses. The four lenses are sequentially arranged along an optical path from an object side to an image side as a first lens, a second lens, a third lens, and a fourth lens. The four lenses each have an object side surface facing the object side direction and an image side surface facing the image side direction. The first lens has a negative refractive power, and the first lens image side surface is concave at a vicinity of an optical axis. The second lens has a positive refractive power. The third lens has a positive refractive power, the third lens object side surface is concave at the vicinity of the optical axis, and the third lens image side surface is convex at the vicinity of the optical axis. The image capturing optical system lens further includes an aperture, and the aperture is located between the second lens and the third lens. When certain conditions are met, the image capturing optical system lens can simultaneously meet the requirements of a wide viewing angle, miniaturization, and high imaging quality. An image capturing device having the image capturing optical system lens and an electronic device having the image capturing device are also disclosed.

Description

Technical Field

[0001] This invention relates to an image-capturing optical system lens assembly, an image-capturing device, and an electronic device, particularly an image-capturing optical system lens assembly and an image-capturing device suitable for electronic devices. Background Technology

[0002] With advancements in semiconductor technology, the performance of electronic image sensors has improved, and pixels can be made smaller. As a result, optical lenses with high image quality have become an indispensable component.

[0003] With the rapid advancement of technology, electronic devices equipped with optical lenses are being used in a wider range of applications, leading to more diverse requirements for these lenses. Since existing optical lenses often struggle to achieve a balance between image quality, sensitivity, aperture size, size, and viewing angle, this invention provides an optical lens that meets these needs. Summary of the Invention

[0004] This invention provides an imaging optical system lens assembly, an imaging device, and an electronic device. The imaging optical system lens assembly comprises four lenses arranged sequentially along the optical path from the object side to the image side. Under certain conditions, the imaging optical system lens assembly provided by this invention can simultaneously meet the requirements of wide viewing angle, miniaturization, and high image quality.

[0005] This invention provides an imaging optical system lens assembly comprising four lenses. The four lenses are sequentially arranged from the object side to the image side along the optical path as a first lens, a second lens, a third lens, and a fourth lens. Each of the four lenses has an object-side surface facing the object side and an image-side surface facing the image side. The first lens has negative refractive power, and its image-side surface is concave near the optical axis. The second lens has positive refractive power. The third lens has positive refractive power, its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. The fourth lens has negative refractive power, its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. An air gap exists along the optical axis between the second and third lenses of the imaging optical system lens assembly. The imaging optical system lens assembly also includes an aperture located between the second and third lenses. The object-side surface of the second lens has a radius of curvature of R3, the image-side surface of the second lens has a radius of curvature of R4, the focal length of the imaging optical system lens group is f, the thickness of the second lens along the optical axis is CT2, and the thickness of the third lens along the optical axis is CT3. These conditions must be met:

[0006] -1.65 < (R3 + R4) / (R3 - R4); and

[0007] 0.60 <f / (CT2+CT3)<2.50。

[0008] The present invention further provides an imaging optical system lens assembly comprising four lenses. The four lenses are sequentially arranged from the object side to the image side along the optical path as a first lens, a second lens, a third lens, and a fourth lens. Each of the four lenses has an object-side surface facing the object side and an image-side surface facing the image side. The first lens has negative refractive power, and its image-side surface is concave near the optical axis. The second lens has positive refractive power. The third lens has positive refractive power, its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. The fourth lens has negative refractive power, its object-side surface is convex near the optical axis, its image-side surface is concave near the optical axis, and at least one of its object-side surface and its image-side surface has at least one inflection point. An air gap exists between the second and third lenses of the imaging optical system lens assembly along the optical axis. The imaging optical system lens assembly also includes an aperture located between the second and third lenses. The radius of curvature of the object-side surface of the second lens is R3, and the radius of curvature of the image-side surface of the second lens is R4, which satisfy the following conditions:

[0009] -1.40<(R3+R4) / (R3-R4)<0.80.

[0010] The present invention further provides an imaging optical system lens assembly comprising four lenses. The four lenses are sequentially arranged from the object side to the image side along the optical path as a first lens, a second lens, a third lens, and a fourth lens. Each of the four lenses has an object-side surface facing the object side and an image-side surface facing the image side. The first lens has negative refractive power, and its image-side surface is concave near the optical axis. The second lens has positive refractive power. The third lens has positive refractive power, its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. The imaging optical system lens assembly also includes an aperture located between the second and third lenses. The second lens has an object-side surface radius of curvature of R3, an image-side surface radius of curvature of R4, an object-side surface radius of curvature of R7, and an image-side surface radius of curvature of R8. The focal length of the imaging optical system is f. The thickness of the second lens along the optical axis is CT2, the thickness of the third lens along the optical axis is CT3, and the thickness of the fourth lens along the optical axis is CT4. The aperture value of the imaging optical system is Fno. The distance along the optical axis from the object-side surface of the first lens to the image-side surface of the fourth lens is TD, which satisfies the following conditions:

[0011] -2.40 < (R3 + R4) / (R3 - R4) < 15.0;

[0012] -0.85 < (R7 + R8) / (R7 - R8);

[0013] 0.60 <f / (CT2+CT3)<1.52;

[0014] 1.40 < Fno < 2.50; and

[0015] 5.00 < TD / CT4 < 22.0.

[0016] The present invention provides an imaging device, which includes the aforementioned imaging optical system lens group and an electronic photosensitive element, wherein the electronic photosensitive element is disposed on the imaging surface of the imaging optical system lens group.

[0017] The present invention provides an electronic device, which includes the aforementioned imaging device.

[0018] When (R3 + R4) / (R3 - R4) satisfies the above conditions, the surface shape and refractive power of the second lens can be adjusted, which helps to reduce the effective radius height of the second lens.

[0019] When f / (CT2 + CT3) satisfies the above conditions, the ratio of the sum of the thicknesses of the second lens and the third lens to the focal length can be adjusted, and a balance can be achieved between increasing the image height and reducing the total length of the imaging optical system lens group.

[0020] When (R7 + R8) / (R7 - R8) satisfies the above conditions, the surface shape and refractive power of the fourth lens can be adjusted, which helps to reduce the length of the back focal length.

[0021] When Fno satisfies the above conditions, the ratio of the aperture size to the focal length can be adjusted, which helps to increase the light incident amount of the imaging optical system lens group and obtain better imaging quality in the dark.

[0022] When TD / CT4 satisfies the above conditions, the ratio of the distance from the object side surface of the first lens to the image side surface of the fourth lens to the thickness of the fourth lens can be adjusted, which helps to achieve a balance between reducing manufacturing tolerances and reducing temperature effects.

[0023] The above description of the content of the present invention and the following description of the embodiments are used to demonstrate and explain the spirit and principle of the present invention, and provide a further explanation of the claims of the present invention. Description of the Drawings

[0024] Figure 1 Schematic diagram of an imaging device according to the first embodiment of the present invention is shown.

[0025] Figure 2 From left to right are the spherical aberration, astigmatism, and distortion curves of the first embodiment in sequence.

[0026] Figure 3 Schematic diagram of an imaging device according to the second embodiment of the present invention is shown.

[0027] Figure 4 From left to right are the spherical aberration, astigmatism, and distortion curves of the second embodiment in sequence.

[0028] Figure 5 A schematic diagram of an image-capturing device according to a third embodiment of the present invention is shown.

[0029] Figure 6 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the third embodiment.

[0030] Figure 7 A schematic diagram of an image-capturing device according to a fourth embodiment of the present invention is shown.

[0031] Figure 8 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the fourth embodiment.

[0032] Figure 9 A schematic diagram of an image-capturing device according to a fifth embodiment of the present invention is shown.

[0033] Figure 10 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the fifth embodiment.

[0034] Figure 11 A schematic diagram of an image-capturing device according to a sixth embodiment of the present invention is shown.

[0035] Figure 12 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the sixth embodiment.

[0036] Figure 13 A schematic diagram of an image-capturing device according to a seventh embodiment of the present invention is shown.

[0037] Figure 14 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the seventh embodiment.

[0038] Figure 15 A schematic diagram of an imaging device according to the eighth embodiment of the present invention is shown.

[0039] Figure 16 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the eighth embodiment.

[0040] Figure 17 A perspective schematic diagram of an imaging device according to a ninth embodiment of the present invention is shown.

[0041] Figure 18 A perspective view of one side of an electronic device according to a tenth embodiment of the present invention is shown.

[0042] Figure 19 Draw Figure 18 A three-dimensional diagram of the other side of the electronic device.

[0043] Figure 20A perspective view of one side of an electronic device according to the eleventh embodiment of the present invention is shown.

[0044] Figure 21 Draw Figure 20 A three-dimensional diagram of the other side of the electronic device.

[0045] Figure 22 Draw Figure 20 System block diagram of an electronic device.

[0046] Figure 23 A perspective view of one side of an electronic device according to the twelfth embodiment of the present invention is shown.

[0047] Figure 24 A perspective view of one side of an electronic device according to the thirteenth embodiment of the present invention is shown.

[0048] Figure 25 A partial internal schematic diagram of a vehicle tool according to the fourteenth embodiment of the present invention is shown.

[0049] Figure 26 Draw Figure 25 A schematic diagram of the image captured by the imaging device of a vehicle tool when performing its detection function.

[0050] Figure 27 A partial internal schematic diagram of a vehicle tool according to the fifteenth embodiment of the present invention is shown.

[0051] Figure 28 Draw Figure 27 A schematic diagram of the image captured by the imaging device of a vehicle tool when performing its detection function.

[0052] Figure 29 A schematic diagram illustrating the inflection point of the fourth lens according to the first embodiment of the present invention is shown.

[0053] Figure 30 A schematic diagram illustrating an arrangement of the optical path deflection element according to the present invention in the lens assembly of an imaging optical system is shown.

[0054] Figure 31 A schematic diagram illustrating another configuration of the optical path deflection element according to the present invention in the lens assembly of the imaging optical system is shown.

[0055] Figure 32 A schematic diagram illustrating one configuration of the two optical path deflection elements in an imaging optical system lens assembly according to the present invention is shown.

[0056] [Symbol Explanation]

[0057] 1, 2, 3, 4, 5, 6, 7, 8, 100, 100a, 100b, 100c, 100d, 100e, 100f,

[0058] 100g, 100h, 100i, 100j, 100k, 100m, 100n, 100p, 100q, 100r, 100s:

[0059] Image capturing device

[0060] 101: Imaging Lens

[0061] 102: Drive unit

[0062] 103: Electronic photosensitive element

[0063] 104: Image Stabilization Module

[0064] 200, 300, 400, 500: Electronic devices

[0065] 600, 700: Vehicles and Tools

[0066] 201, 304: Display module

[0067] 301, 401, 501: Flash module

[0068] 601: Dashboard

[0069] 701: Rearview Mirror

[0070] 302: Focusing Assist Module

[0071] 602: Center console

[0072] 303: Image Signal Processor

[0073] 305: Image Software Processor

[0074] 306: Subject

[0075] P: Inversion point

[0076] OA1: First optical axis

[0077] OA2: Second optical axis

[0078] OA3: Third optical axis

[0079] LF: Optical path switching element

[0080] LF1: First optical path switching element

[0081] LF2: Second optical path switching element

[0082] LG: Lens Group

[0083] ST: Aperture

[0084] S1, S2: Aperture

[0085] E1: First lens

[0086] E2: Second lens

[0087] E3: Third Lens

[0088] E4: Fourth Lens

[0089] E5: Filter element

[0090] IMG: Imaging Surface

[0091] IS: Electronic photosensitive element Detailed Implementation

[0092] The imaging optical system comprises four lenses, which are arranged sequentially from the object side to the image side along the optical path as a first lens, a second lens, a third lens, and a fourth lens. Each of the four lenses has an object-side surface facing the object side and an image-side surface facing the image side.

[0093] The first lens has negative refractive power; this helps to reduce the volume of the first and second lenses in the imaging optical system assembly. The image-side surface of the first lens is concave near the optical axis; this allows adjustment of the surface shape of the first lens, which helps to correct aberrations such as astigmatism.

[0094] The second lens has positive refractive power. This allows it to work in conjunction with the first lens to correct aberrations such as spherical aberration.

[0095] The third lens has positive refractive power; thus, it can work in conjunction with the fourth lens to correct coma in the adjacent field of view. The object-side surface of the third lens is concave near the optical axis; thus, the direction of light propagation can be adjusted, which helps to balance the volume distribution of the lens group in the imaging optical system. The image-side surface of the third lens is convex near the optical axis; thus, the surface shape of the third lens can be adjusted, which helps to correct aberrations such as spherical aberration.

[0096] The fourth lens can have negative refractive power; this helps to reduce the volume of the third and fourth lenses in the imaging optical system. The object-side surface of the fourth lens can be convex near the optical axis; this allows adjustment of the direction of light travel, helping to increase the image area. The image-side surface of the fourth lens can be concave near the optical axis; this allows adjustment of the shape of the image-side surface, helping to reduce the back focal length.

[0097] The fourth lens may have at least one inflection point on at least one of its object-side surface and its image-side surface. This allows adjustment of the angle of incidence of light at the imaging plane, helping to reduce the effect of temperature changes on the size of the surrounding field of view spot. Please refer to... Figure 29 , a schematic diagram showing the inflection point P of the object-side surface and the image-side surface of the fourth lens E4 in the first embodiment of the present invention. Figure 29 Illustrating the inflection point of the object-side surface and the image-side surface of the fourth lens in the first embodiment as an example. However, in addition to the above-mentioned inflection points in various embodiments of the present invention, each lens surface may also have one or more inflection points.

[0098] According to the imaging optical system lens group disclosed in the present invention, it further includes an aperture, and the aperture is located between the second lens and the third lens. Thereby, the position of the aperture in the imaging optical system lens group can be adjusted, which helps to increase the viewing angle and the aperture size.

[0099] According to the imaging optical system lens group disclosed in the present invention, there may be an air gap on the optical axis between the second lens and the third lens, that is, the second lens and the third lens can be two single non-bonded lenses; thereby, the relative positions of the second lens and the third lens can be adjusted, which can reduce the difficulties in lens manufacturing and assembly. Since the process of bonded lenses is more complex than that of non-bonded lenses, especially the bonding surfaces of the two lenses need to have highly accurate curved surfaces to achieve a high degree of tightness when the two lenses are bonded. Moreover, during the bonding process, poor tightness may also be caused by misalignment, affecting the overall optical imaging quality. Therefore, non-bonded lenses can effectively avoid the problems caused by bonded lenses, and each lens surface can have more flexibility in design, which helps to reduce the volume and correct aberration.

[0100] The radius of curvature of the object-side surface of the second lens is R3, and the radius of curvature of the image-side surface of the second lens is R4, which satisfy the following condition: -1.65 < (R3 + R4) / (R3 - R4). Thereby, the surface shape and refractive power of the second lens can be adjusted, which helps to reduce the effective radius height of the second lens. Among them, the following conditions can also be satisfied: -2.40 < (R3 + R4) / (R3 - R4) < 15.0. Among them, the following conditions can also be satisfied: -1.50 < (R3 + R4) / (R3 - R4) < 4.00. Among them, the following conditions can also be satisfied: -1.40 < (R3 + R4) / (R3 - R4) < 0.80.

[0101] The focal length of the imaging optical system lens group is f, the thickness of the second lens on the optical axis is CT2, and the thickness of the third lens on the optical axis is CT3, which can satisfy the following condition: 0.60 < f / (CT2 + CT3) < 2.50. Thereby, the ratio of the sum of the thicknesses of the second lens and the third lens to the overall focal length can be adjusted, and a balance can be achieved between increasing the image height and reducing the total length of the imaging optical system lens group. Among them, the following conditions can also be satisfied: 0.60 < f / (CT2 + CT3) < 1.52.

[0102] The radius of curvature of the object-side surface of the fourth lens is R7, and the radius of curvature of the image-side surface of the fourth lens is R8, which can satisfy the following condition: -0.85 < (R7 + R8) / (R7 - R8). Thereby, the surface shape and refractive power of the fourth lens can be adjusted, which helps to reduce the length of the back focal length. Among them, the following condition can also be satisfied: -0.30 < (R7 + R8) / (R7 - R8) < 8.00.

[0103] The F-number of the imaging optical system lens group is Fno, which can satisfy the following condition: 1.40 < Fno < 2.50. Thereby, the ratio of the aperture size to the focal length can be adjusted, which helps to increase the amount of light entering the imaging optical system lens group and obtain better imaging quality in the dark. Among them, the following condition can also be satisfied: 1.50 < Fno < 2.40. Among them, the following condition can also be satisfied: 1.50 < Fno < 2.30. Among them, the following condition can also be satisfied: 1.60 < Fno < 2.25.

[0104] The distance on the optical axis from the object-side surface of the first lens to the image-side surface of the fourth lens is TD, and the thickness of the fourth lens on the optical axis is CT4, which can satisfy the following condition: 5.00 < TD / CT4 < 22.0. Thereby, the ratio of the distance from the object-side surface of the first lens to the image-side surface of the fourth lens to the thickness of the fourth lens can be adjusted, which helps to balance between reducing manufacturing tolerances and reducing temperature effects. Among them, the following condition can also be satisfied: 6.50 < TD / CT4 < 20.0. Among them, the following condition can also be satisfied: 5.00 < TD / CT4 < 18.5.

[0105] The distance between the third lens and the fourth lens on the optical axis is T34, and the sum of the distances between all adjacent lenses in the imaging optical system lens group on the optical axis is ΣAT, which can satisfy the following condition: 0 < T34 / ΣAT < 0.10. Thereby, the spacing between the lenses in the imaging optical system lens group can be adjusted, which helps to compress the volume of the imaging optical system lens group.

[0106] The radius of curvature of the object-side surface of the second lens is R3, and the radius of curvature of the object-side surface of the third lens is R5, which can satisfy the following condition: -0.38 < (R3 + R5) / (R3 - R5) < 0.27. Thereby, the surface shape of the object-side surface of the second lens and the surface shape of the object-side surface of the third lens can be adjusted, which helps to reduce the spherical aberration of the central field of view.

[0107] The focal length of the imaging optical system lens group is f, and the focal length of the second lens is f2, which can satisfy the following condition: 0.65 < f / f2 < 2.50. Thereby, the refractive power of the second lens can be adjusted, which helps to reduce the spot size of the central field of view. Among them, the following condition can also be satisfied: 0.65 < f / f2 < 2.00.

[0108] The focal length of the imaging optical system lens group is f, and the radius of curvature of the object side surface of the second lens is R3, which can satisfy the following condition: 0.70 < f / R3 < 2.00. Thereby, the ratio of the radius of curvature of the object side surface of the second lens to the overall focal length can be adjusted, which helps to compress the volume and correct aberration.

[0109] The radius of curvature of the object side surface of the second lens is R3, and the radius of curvature of the image side surface of the third lens is R6, which can satisfy the following condition: 0.10 < (R3 + R6) / (R3 - R6) < 0.65. Thereby, the surface shapes of the object side surface of the second lens and the image side surface of the third lens can be adjusted, which helps to increase the light collection quality of the center and adjacent near fields.

[0110] The distance on the optical axis from the object side surface of the first lens to the image side surface of the fourth lens is TD, and the interval distance on the optical axis from the aperture to the imaging surface is SL, which can satisfy the following condition: 0.40 < TD / SL < 1.50. Thereby, the ratio of the distance from the object side surface of the first lens to the image side surface of the fourth lens to the distance from the aperture to the imaging surface can be adjusted, which helps to reduce the volume of the imaging optical system lens group. Among them, the following conditions can also be satisfied: 0.60 < TD / SL < 1.30. Among them, the following conditions can also be satisfied: 0.65 < TD / SL < 1.30.

[0111] The focal length of the imaging optical system lens group is f, and the interval distance on the optical axis between the second lens and the third lens is T23, which can satisfy the following condition: 2.50 < f / T23 < 15.0. Thereby, the ratio of the overall focal length to the lens spacing between the second lens and the third lens can be adjusted, which helps to reasonably allocate the volume and reduce the assembly error.

[0112] The distance on the optical axis from the object side surface of the second lens to the aperture is Dr3s, and the distance on the optical axis from the image side surface of the second lens to the aperture is Dr4s, which can satisfy the following condition: -0.80 < Dr4s / Dr3s < 1.00. Thereby, the relative position between the second lens and the aperture can be adjusted, which helps to increase the aperture size and increase the relative illuminance of the surrounding field of view.

[0113] The distance from the object side surface of the third lens to the aperture on the optical axis is Dr5s, and the distance from the image side surface of the third lens to the aperture on the optical axis is Dr6s, which can satisfy the following condition: -0.80 < Dr5s / Dr6s < 1.00. Thereby, the relative position between the third lens and the aperture can be adjusted, which helps to reduce the influence of the temperature effect on the relative illuminance of the surrounding field of view. It should be noted that Dr3s, Dr4s, Dr5s, and Dr6s are positive in the direction from the object side to the image side, and negative in the direction from the image side to the object side. For example, if the aperture is located between the first lens and the second lens, then Dr3s, Dr4s, Dr5s, and Dr6s are negative; if the aperture is located between the second lens and the third lens, then Dr3s and Dr4s are positive, and Dr5s and Dr6s are negative; if the aperture is located between the third lens and the fourth lens, then Dr3s, Dr4s, Dr5s, and Dr6s are positive.

[0114] The focal length of the imaging optical system lens group is f, and the combined focal length of the second lens and the third lens is f23, which can satisfy the following condition: 0.60 < f / f23 < 1.80. Thereby, the overall refractive power from the second lens to the third lens can be adjusted, which helps to correct the astigmatism aberration.

[0115] The focal length of the imaging optical system lens group is f, and the radius of curvature of the object side surface of the first lens is R1, which can satisfy the following condition: -0.30 < f / R1 < 0.50. Thereby, the ratio of the overall focal length to the radius of curvature of the object side surface of the first lens can be adjusted, which helps to increase the viewing angle. Among them, the following condition can also be satisfied: -0.20 < f / R1 < 0.34.

[0116] The distance between the second lens and the third lens on the optical axis is T23, and the distance between the third lens and the fourth lens on the optical axis is T34, which can satisfy the following condition: 11.0 < T23 / T34 < 19.0. Thereby, the ratio of the lens spacing between the second lens and the third lens to the lens spacing between the third lens and the fourth lens can be adjusted, which helps to adjust the lens distribution and balance the volume distribution of the imaging optical system lens group.

[0117] The focal length of the imaging optical system lens group is f, the distance between the second lens and the third lens on the optical axis is T23, and the distance between the third lens and the fourth lens on the optical axis is T34, which can satisfy the following condition: 2.00 < f / (T23 + T34) < 6.20. Thereby, the ratio of the overall focal length to the sum of the lens spacings from the second lens to the fourth lens can be adjusted, which helps to reduce the collision during lens assembly and improve the assembly qualification rate.

[0118] The refractive index of the first lens is N1, and the refractive index of the second lens is N2, which can satisfy the following condition: 1.63 < (N1 + N2) / 2 < 1.83. Thereby, the average value of the refractive index of the first lens and the refractive index of the second lens can be adjusted, which helps to increase the image height and the viewing angle.

[0119] The focal length of the imaging optical system lens group is f, the spacing distance between the first lens and the second lens on the optical axis is T12, and the spacing distance between the second lens and the third lens on the optical axis is T23, which can satisfy the following condition: 0.55 < f / (T12 + T23) < 2.85. Thereby, the ratio of the overall focal length to the sum of the lens spacing distances from the first lens to the third lens can be adjusted, which helps to reduce the change in focal length caused by temperature changes.

[0120] Each technical feature in the imaging optical system lens group disclosed in the present invention can be combined and configured to achieve the corresponding effects.

[0121] In the imaging optical system lens group disclosed in the present invention, the material of the lens can be glass or plastic. If the material of the lens is glass, the freedom of refractive power configuration of the imaging optical system lens group can be increased, and the influence of external environmental temperature changes on imaging can be reduced, and the glass lens can be made by techniques such as grinding or molding. If the lens material is plastic, the production cost can be effectively reduced. In addition, a spherical surface (SPH) or an aspherical surface (ASP) can be set on the lens surface. Among them, the spherical lens can reduce the manufacturing difficulty, and if an aspherical surface is set on the lens surface, more control variables can be obtained thereby to eliminate aberrations, reduce the number of lenses, and effectively reduce the total length of the imaging optical system lens group of the present invention. Further, the aspherical surface can be made by methods such as plastic injection molding or molding of glass lenses.

[0122] In the imaging optical system lens group disclosed in the present invention, if the lens surface is an aspherical surface, it means that all or a part of the optically effective area of the lens surface is an aspherical surface.

[0123] In the imaging optical system lens group disclosed in the present invention, additives can be selectively added to any (or more) lens materials to produce light absorption or light interference effects, so as to change the transmittance of the lens to light of a specific wavelength band, and further reduce stray light and color deviation. For example: the additive can have the function of filtering light in the wavelength band of 600 nm to 800 nm in the system, so as to help reduce excess red light or infrared light; or it can filter light in the wavelength band of 350 nm to 450 nm to reduce excess blue light or ultraviolet light. Therefore, the additive can avoid the interference of light of a specific wavelength band on imaging. In addition, the additive can be uniformly mixed in the plastic and made into a lens by injection molding technology. In addition, the additive can also be configured on the coating on the lens surface to provide the above effects.

[0124] In the imaging optical system lens assembly disclosed in this invention, if the lens surface is convex and the position of the convex surface is not defined, it means that the convex surface can be located near the optical axis of the lens surface; if the lens surface is concave and the position of the concave surface is not defined, it means that the concave surface can be located near the optical axis of the lens surface. If the refractive power or focal length of the lens is not defined in its region, it means that the refractive power or focal length of the lens can be the refractive power or focal length of the lens near the optical axis.

[0125] In the imaging optical system lens assembly disclosed in this invention, the inflection point of the lens surface refers to the boundary point where the curvature of the lens surface changes from positive to negative. The critical point of the lens surface refers to the point of tangency on the tangent line between a plane perpendicular to the optical axis and the lens surface, and the critical point is not located on the optical axis.

[0126] In the imaging optical system lens assembly disclosed in this invention, the imaging surface of the imaging optical system lens assembly can be a plane or a curved surface with any curvature, depending on the corresponding electronic photosensitive element, especially a curved surface with a concave surface facing the object side.

[0127] In the imaging optical system lens assembly disclosed in this invention, one or more imaging correction elements (such as planar elements) can be selectively arranged between the lens closest to the imaging plane and the imaging plane in the imaging optical path to achieve the effect of correcting image curvature, etc. The optical properties of the imaging correction element, such as curvature, thickness, refractive index, position, and surface shape (convex or concave, spherical or aspherical, diffractive surface, and Fresnel surface, etc.), can be adjusted according to the requirements of the imaging device. Generally, a preferred configuration of the imaging correction element is to place a thin plano-concave element with a concave surface in the object-side direction close to the imaging plane.

[0128] In the imaging optical system lens assembly disclosed in this invention, at least one element with a deflecting optical path function, such as a prism or a mirror, can be selectively arranged between the subject and the imaging plane in the imaging optical path. This provides a more flexible spatial configuration for the imaging optical system lens assembly, allowing the thinning and lightening of electronic devices to be unrestricted by the total optical length of the imaging optical system lens assembly. For further explanation, please refer to... Figure 30 and Figure 31 ,in Figure 30 A schematic diagram illustrating an arrangement of the optical path deflection element according to the present invention in a lens assembly of an imaging optical system is provided. Figure 31 A schematic diagram illustrating another configuration of the optical path deflection element according to the present invention in the lens assembly of an imaging optical system is shown. Figure 30 and Figure 31 As shown, the imaging optical system lens assembly can travel along the optical path from the subject (not shown) to the imaging plane IMG, and sequentially includes a first optical axis OA1, an optical path deflection element LF, and a second optical axis OA2, wherein the optical path deflection element LF can be as follows: Figure 30 As shown, it is positioned between the lens group LG of the subject and the image-capturing optical system lens group, or as... Figure 31 The image is positioned between the lens group LG and the imaging plane IMG in the imaging optical system. Please also refer to... Figure 32 A schematic diagram illustrating an arrangement of two optical path deflection elements in an imaging optical system lens assembly according to the present invention is shown, such as... Figure 32 As shown, the imaging optical system lens assembly can also travel along the light path from the subject (not shown) to the imaging plane IMG, and sequentially includes a first optical axis OA1, a first optical path reversing element LF1, a second optical axis OA2, a second optical path reversing element LF2, and a third optical axis OA3. The first optical path reversing element LF1 is positioned between the subject and the lens group LG of the imaging optical system lens assembly, and the second optical path reversing element LF2 is positioned between the lens group LG of the imaging optical system lens assembly and the imaging plane IMG. Furthermore, the direction of light travel along the first optical axis OA1 can be as follows: Figure 32 The direction shown is the same as the direction of light travel along the third optical axis OA3. The imaging optical system lens group may also selectively be configured with more than three optical path deflection elements; the present invention is not limited to the type, number, and position of the optical path deflection elements disclosed in the accompanying drawings.

[0129] The imaging optical system lens group disclosed in this invention may be provided with at least one aperture stop, which may be located in front of the first lens, between the lenses, or after the last lens. The aperture stop may be of the type such as a glare stop or a field stop, which can be used to reduce stray light and help improve image quality.

[0130] In the imaging optical system lens assembly disclosed in this invention, the aperture can be configured as a front aperture or a central aperture. A front aperture means the aperture is positioned between the subject and the first lens, while a central aperture means the aperture is positioned between the first lens and the imaging plane. A front aperture allows for a longer distance between the exit pupil and the imaging plane, resulting in a telecentric effect and increasing the efficiency of image reception by the CCD or CMOS sensor. A central aperture helps to expand the field of view of the imaging optical system lens assembly.

[0131] This invention may appropriately incorporate a variable aperture element, which can be a mechanical component or a light-regulating element, and whose aperture size and shape can be controlled electrically or by electrical signals. The mechanical component may include movable parts such as a blade assembly or a shielding plate; the light-regulating element may include a filter element, an electrochromic material, a liquid crystal layer, or other shielding material. This variable aperture element can enhance image adjustment capabilities by controlling the amount of light entering the image or the exposure time. Furthermore, this variable aperture element can also be the aperture of this invention, allowing image quality, such as depth of field or exposure speed, to be adjusted by changing the aperture value.

[0132] Based on the above implementation methods, specific embodiments are presented below and described in detail with reference to the accompanying drawings.

[0133] <First Embodiment>

[0134] Please refer to Figures 1 to 2 ,in Figure 1 A schematic diagram of an image-capturing device according to a first embodiment of the present invention is shown. Figure 2 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the first embodiment. Figure 1 It is known that the image capturing device 1 includes an image capturing optical system lens assembly (unlabeled) and an electronic photosensitive element IS. The image capturing optical system lens assembly, arranged sequentially from the object side to the image side along the optical path, includes a first lens E1, a second lens E2, an aperture ST, a third lens E3, a fourth lens E4, a filter element E5, and an imaging surface IMG. The electronic photosensitive element IS is disposed on the imaging surface IMG. The image capturing optical system lens assembly comprises four lenses (E1, E2, E3, and E4), and there are no other interposed lenses between each lens. An air gap exists between the second lens E2 and the third lens E3 along the optical axis.

[0135] The first lens E1 has negative refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0136] The second lens E2 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0137] The third lens E3 has positive refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical, and its image-side surface has a point of inflection.

[0138] The fourth lens E4 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has two inflection points, and its image-side surface also has two inflection points.

[0139] The filter element E5 is made of glass and is located between the fourth lens E4 and the imaging plane IMG. It does not affect the focal length of the imaging optical system lens group.

[0140] The equations for the aspherical surfaces of the above lenses are expressed as follows:

[0141]

[0142] X: The displacement parallel to the optical axis from the intersection of the aspherical surface and the optical axis to a point on the aspherical surface at a distance Y from the optical axis;

[0143] Y: The perpendicular distance between a point on the aspherical curve and the optical axis;

[0144] R: Radius of curvature;

[0145] k: cone coefficient; and

[0146] Ai: The i-th order aspherical coefficient.

[0147] In the imaging optical system lens group of the first embodiment, the focal length of the imaging optical system lens group is f, the focal length of the imaging optical system lens group at the wavelength of the helium d line is fd, the aperture value of the imaging optical system lens group is Fno, and half of the maximum angle of view in the imaging optical system lens group is HFOV, with the following values: f = 4.86 mm, fd = 4.66 mm, Fno = 1.89, HFOV = 32.2 degrees.

[0148] The first lens E1 has a refractive index of N1, and the second lens E2 has a refractive index of N2, satisfying the following condition: (N1+N2) / 2=1.65.

[0149] The radius of curvature of the object-side surface of the second lens E2 is R3, and the radius of curvature of the image-side surface of the second lens E2 is R4, which satisfies the following condition: (R3+R4) / (R3-R4)=-1.06.

[0150] The radius of curvature of the object-side surface of the second lens E2 is R3, and the radius of curvature of the object-side surface of the third lens E3 is R5, which satisfies the following condition: (R3+R5) / (R3-R5)=-0.23.

[0151] The radius of curvature of the object-side surface of the second lens E2 is R3, and the radius of curvature of the image-side surface of the third lens E3 is R6, which satisfies the following condition: (R3+R6) / (R3-R6)=0.14.

[0152] The radius of curvature of the object-side surface of the fourth lens E4 is R7, and the radius of curvature of the image-side surface of the fourth lens E4 is R8, which satisfies the following condition: (R7+R8) / (R7-R8)=3.81.

[0153] The distance from the object-side surface of the second lens E2 to the aperture ST on the optical axis is Dr3s, and the distance from the image-side surface of the second lens E2 to the aperture ST on the optical axis is Dr4s, which satisfies the following condition: Dr4s / Dr3s=0.04.

[0154] The distance from the object-side surface of the third lens E3 to the aperture ST on the optical axis is Dr5s, and the distance from the image-side surface of the third lens E3 to the aperture ST on the optical axis is Dr6s, which satisfies the following condition: Dr5s / Dr6s=0.28.

[0155] The focal length of the lens group of the imaging optical system is f, the thickness of the second lens E2 on the optical axis is CT2, and the thickness of the third lens E3 on the optical axis is CT3. They satisfy the following condition: f / (CT2+CT3)=1.15.

[0156] The focal length of the lens group in the imaging optical system is f. The distance between the first lens E1 and the second lens E2 on the optical axis is T12, and the distance between the second lens E2 and the third lens E3 on the optical axis is T23, which satisfies the following condition: f / (T12+T23)=2.79. In this embodiment, the distance between two adjacent lenses on the optical axis refers to the distance between the two adjacent mirror surfaces of the two adjacent lenses on the optical axis.

[0157] The focal length of the lens group of the imaging optical system is f, the distance between the second lens E2 and the third lens E3 on the optical axis is T23, and the distance between the third lens E3 and the fourth lens E4 on the optical axis is T34. It satisfies the following condition: f / (T23+T34)=5.47.

[0158] The focal length of the lens group in the imaging optical system is f, and the focal length of the second lens E2 is f2, which satisfies the following condition: f / f2=1.44.

[0159] The focal length of the lens group in the imaging optical system is f, and the combined focal length of the second lens E2 and the third lens E3 is f23, which satisfies the following condition: f / f23=1.30.

[0160] The focal length of the lens group of the imaging optical system is f, and the radius of curvature of the object-side surface of the first lens E1 is R1, which satisfies the following condition: f / R1=0.21.

[0161] The focal length of the lens group of the imaging optical system is f, and the radius of curvature of the object-side surface of the second lens E2 is R3, which satisfies the following condition: f / R3=1.86.

[0162] The focal length of the lens group of the imaging optical system is f, and the distance between the second lens E2 and the third lens E3 on the optical axis is T23, which satisfies the following condition: f / T23=5.80.

[0163] The distance between the second lens E2 and the third lens E3 on the optical axis is T23, and the distance between the third lens E3 and the fourth lens E4 on the optical axis is T34, which satisfies the following condition: T23 / T34=16.76.

[0164] The optical axis spacing between the third lens E3 and the fourth lens E4 is T34. The sum of the optical axis spacing between all adjacent lenses in the imaging optical system is ΣAT, which satisfies the following condition: T34 / ΣAT=0.03. In this embodiment, ΣAT is the sum of the optical axis spacing between any two adjacent lenses among the first lens E1, the second lens E2, the third lens E3, and the fourth lens E4.

[0165] The distance on the optical axis from the object-side surface of the first lens E1 to the image-side surface of the fourth lens E4 is TD, and the thickness of the fourth lens E4 on the optical axis is CT4, which satisfies the following condition: TD / CT4 = 16.61.

[0166] The distance on the optical axis from the object-side surface of the first lens E1 to the image-side surface of the fourth lens E4 is TD, and the distance on the optical axis from the aperture ST to the imaging plane IMG is SL, which satisfies the following condition: TD / SL = 1.09.

[0167] Please refer to Table 1 and Table 2 below.

[0168]

[0169]

[0170]

[0171] Table 1 is... Figure 1 The first embodiment provides detailed structural data, where the units for radius of curvature, thickness, and focal length are millimeters (mm), and surfaces 0 to 12 sequentially represent surfaces from the object side to the image side. Table 2 shows the aspherical data in the first embodiment, where k is the cone coefficient in the aspherical curve equation, and A4 to A16 represent the 4th to 16th order aspherical coefficients of each surface. Furthermore, the tables for the following embodiments are corresponding schematic diagrams and aberration curves for each embodiment. The definitions of the data in the tables are the same as those in Tables 1 and 2 of the first embodiment, and will not be repeated here.

[0172] <Second Embodiment>

[0173] Please refer to Figures 3 to 4 ,in Figure 3 A schematic diagram of an image-capturing device according to a second embodiment of the present invention is shown. Figure 4 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the second embodiment. Figure 3It is known that the image capturing device 2 includes an image capturing optical system lens assembly (unlabeled) and an electronic photosensitive element IS. The image capturing optical system lens assembly, arranged sequentially from the object side to the image side along the optical path, includes a first lens E1, an aperture stop S1, a second lens E2, an aperture ST, a third lens E3, an aperture stop S2, a fourth lens E4, a filter element E5, and an imaging surface IMG. The electronic photosensitive element IS is disposed on the imaging surface IMG. The image capturing optical system lens assembly includes four lenses (E1, E2, E3, E4), and there are no other interposed lenses between each lens. The second lens E2 and the third lens E3 have an air gap on the optical axis.

[0174] The first lens E1 has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has two inflection points, its image-side surface has one inflection point, and its object-side surface has a critical point off-axis.

[0175] The second lens E2 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical, and its object-side surface has a point of inflection.

[0176] The third lens E3 has positive refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical, and its image-side surface has a point of inflection.

[0177] The fourth lens E4 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical, and its image-side surface has two inflection points.

[0178] The filter element E5 is made of glass and is located between the fourth lens E4 and the imaging plane IMG. It does not affect the focal length of the imaging optical system lens group.

[0179] Please refer to Table 3 and Table 4 below.

[0180]

[0181]

[0182]

[0183] In the second embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in the table below are the same as in the first embodiment and will not be repeated here.

[0184]

[0185] <Third Embodiment>

[0186] Please refer to Figures 5 to 6 ,in Figure 5 A schematic diagram of an image-capturing device according to a third embodiment of the present invention is shown. Figure 6 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the third embodiment. Figure 5 It is known that the image capturing device 3 includes an image capturing optical system lens assembly (unlabeled) and an electronic photosensitive element IS. The image capturing optical system lens assembly, arranged sequentially from the object side to the image side along the optical path, includes a first lens E1, a second lens E2, an aperture ST, a third lens E3, an aperture stop S1, a fourth lens E4, a filter element E5, and an imaging surface IMG. The electronic photosensitive element IS is disposed on the imaging surface IMG. The image capturing optical system lens assembly includes four lenses (E1, E2, E3, and E4), and there are no other interposed lenses between each lens. The second lens E2 and the third lens E3 have an air gap on the optical axis.

[0187] The first lens E1 has negative refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0188] The second lens E2 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0189] The third lens E3 has positive refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical.

[0190] The fourth lens E4 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has two inflection points, and its image-side surface also has two inflection points.

[0191] The filter element E5 is made of glass and is located between the fourth lens E4 and the imaging plane IMG. It does not affect the focal length of the imaging optical system lens group.

[0192] Please refer to Table 5 and Table 6 below.

[0193]

[0194]

[0195] In the third embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in the table below are the same as in the first embodiment and will not be repeated here.

[0196]

[0197]

[0198] <Fourth Embodiment>

[0199] Please refer to Figures 7 to 8 ,in Figure 7 A schematic diagram of an image-capturing device according to a fourth embodiment of the present invention is shown. Figure 8 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the fourth embodiment. Figure 7 It is known that the image capturing device 4 includes an image capturing optical system lens assembly (unlabeled) and an electronic photosensitive element IS. The image capturing optical system lens assembly, arranged sequentially from the object side to the image side along the optical path, includes a first lens E1, a second lens E2, an aperture ST, a third lens E3, a fourth lens E4, a filter element E5, and an imaging surface IMG. The electronic photosensitive element IS is disposed on the imaging surface IMG. The image capturing optical system lens assembly comprises four lenses (E1, E2, E3, and E4), and there are no other interposed lenses between each lens. The second lens E2 and the third lens E3 have an air gap along the optical axis.

[0200] The first lens E1 has negative refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0201] The second lens E2 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are spherical.

[0202] The third lens E3 has positive refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical, and its image-side surface has a point of inflection.

[0203] The fourth lens E4 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical, and its image-side surface has two inflection points.

[0204] The filter element E5 is made of glass and is located between the fourth lens E4 and the imaging plane IMG. It does not affect the focal length of the imaging optical system lens group.

[0205] Please refer to Tables 7 and 8 below.

[0206]

[0207]

[0208]

[0209] In the fourth embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in the table below are the same as in the first embodiment and will not be repeated here.

[0210]

[0211]

[0212] <Fifth Embodiment>

[0213] Please refer to Figures 9 to 10 ,in Figure 9 A schematic diagram of an image-capturing device according to a fifth embodiment of the present invention is shown. Figure 10 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the fifth embodiment. Figure 9 It is known that the image capturing device 5 includes an image capturing optical system lens group (unlabeled) and an electronic photosensitive element IS. The image capturing optical system lens group, arranged sequentially from the object side to the image side along the optical path, includes a first lens E1, a second lens E2, an aperture ST, a third lens E3, a fourth lens E4, a filter element E5, and an imaging surface IMG. The electronic photosensitive element IS is disposed on the imaging surface IMG. The image capturing optical system lens group includes four lenses (E1, E2, E3, E4), and there are no other interposed lenses between each lens. The second lens E2 and the third lens E3 have an air gap along the optical axis.

[0214] The first lens E1 has negative refractive power and is made of glass. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0215] The second lens E2 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are spherical.

[0216] The third lens E3 has positive refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical, and its image-side surface has a point of inflection.

[0217] The fourth lens E4 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical, and its image-side surface has two inflection points.

[0218] The filter element E5 is made of glass and is located between the fourth lens E4 and the imaging plane IMG. It does not affect the focal length of the imaging optical system lens group.

[0219] Please refer to Tables 9 and 10 below.

[0220]

[0221]

[0222]

[0223] In the fifth embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in the table below are the same as in the first embodiment and will not be repeated here.

[0224]

[0225] <Sixth Embodiment>

[0226] Please refer to Figures 11 to 12 ,in Figure 11 A schematic diagram of an image-capturing device according to a sixth embodiment of the present invention is shown. Figure 12 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the sixth embodiment. Figure 11 It is known that the image capturing device 6 includes an image capturing optical system lens group (unlabeled) and an electronic photosensitive element IS. The image capturing optical system lens group, arranged sequentially from the object side to the image side along the optical path, includes a first lens E1, a second lens E2, an aperture ST, a third lens E3, a fourth lens E4, a filter element E5, and an imaging surface IMG. The electronic photosensitive element IS is disposed on the imaging surface IMG. The image capturing optical system lens group comprises four lenses (E1, E2, E3, and E4), and there are no other interposed lenses between each lens. The second lens E2 and the third lens E3 have an air gap on the optical axis.

[0227] The first lens E1 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical, and its object-side surface has two inflection points.

[0228] The second lens E2 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical.

[0229] The third lens E3 has positive refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical.

[0230] The fourth lens E4 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has a point of inflection, and its image-side surface also has a point of inflection.

[0231] The filter element E5 is made of glass and is located between the fourth lens E4 and the imaging plane IMG. It does not affect the focal length of the imaging optical system lens group.

[0232] Please refer to Table 11 and Table 12 below.

[0233]

[0234]

[0235]

[0236] In the sixth embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in the table below are the same as in the first embodiment and will not be repeated here.

[0237]

[0238]

[0239] <Seventh Embodiment>

[0240] Please refer to Figures 13 to 14 ,in Figure 13 A schematic diagram of an image-capturing device according to a seventh embodiment of the present invention is shown. Figure 14 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the seventh embodiment. Figure 13 It is known that the image capturing device 7 includes an image capturing optical system lens assembly (unlabeled) and an electronic photosensitive element IS. The image capturing optical system lens assembly, arranged sequentially from the object side to the image side along the optical path, includes a first lens E1, a second lens E2, an aperture ST, a third lens E3, a fourth lens E4, a filter element E5, and an imaging surface IMG. The electronic photosensitive element IS is disposed on the imaging surface IMG. The image capturing optical system lens assembly comprises four lenses (E1, E2, E3, and E4), and there are no other interposed lenses between each lens. The second lens E2 and the third lens E3 have an air gap along the optical axis.

[0241] The first lens E1 has negative refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0242] The second lens E2 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are spherical.

[0243] The third lens E3 has positive refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical, and its image-side surface has a point of inflection.

[0244] The fourth lens E4 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical. Its image-side surface has two inflection points and two critical points off-axis.

[0245] The filter element E5 is made of glass and is located between the fourth lens E4 and the imaging plane IMG. It does not affect the focal length of the imaging optical system lens group.

[0246] Please refer to Tables 13 and 14 below.

[0247]

[0248]

[0249]

[0250] In the seventh embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in the table below are the same as in the first embodiment and will not be repeated here.

[0251]

[0252]

[0253] <Eighth Embodiment>

[0254] Please refer to Figures 15 to 16 ,in Figure 15 A schematic diagram of an image-capturing device according to an eighth embodiment of the present invention is shown. Figure 16 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the eighth embodiment. Figure 15 It is known that the image capturing device 8 includes an image capturing optical system lens group (unlabeled) and an electronic photosensitive element IS. The image capturing optical system lens group, arranged sequentially from the object side to the image side along the optical path, includes a first lens E1, a second lens E2, an aperture ST, a third lens E3, a fourth lens E4, a filter element E5, and an imaging surface IMG. The electronic photosensitive element IS is disposed on the imaging surface IMG. The image capturing optical system lens group includes four lenses (E1, E2, E3, E4), and there are no other interposed lenses between each lens. The second lens E2 and the third lens E3 have an air gap on the optical axis.

[0255] The first lens E1 has negative refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0256] The second lens E2 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are spherical.

[0257] The third lens E3 has positive refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical, and its image-side surface has a point of inflection.

[0258] The fourth lens E4 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical. Its image-side surface has a point of inflection and a critical point off-axis.

[0259] The filter element E5 is made of glass and is located between the fourth lens E4 and the imaging plane IMG. It does not affect the focal length of the imaging optical system lens group.

[0260] Please refer to Tables 15 and 16 below.

[0261]

[0262]

[0263]

[0264] In the eighth embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in the table below are the same as in the first embodiment and will not be repeated here.

[0265]

[0266] <Ninth Embodiment>

[0267] Please refer to Figure 17This diagram illustrates a perspective view of an image-capturing device according to a ninth embodiment of the present invention. In this embodiment, the image-capturing device 100 is a camera module. The image-capturing device 100 includes an imaging lens 101, a driving device 102, an electronic photosensitive element 103, and an image stabilization module 104. The imaging lens 101 includes the image-capturing optical system lens group of the first embodiment described above, a lens barrel (not otherwise labeled) for carrying the image-capturing optical system lens group, and a support device (Holder Member, not otherwise labeled). The imaging lens 101 can also be replaced with the image-capturing optical system lens group of other embodiments described above, and the present invention is not limited thereto. The image-capturing device 100 uses the imaging lens 101 to focus light to generate an image, and cooperates with the driving device 102 to focus the image, finally imaging it on the electronic photosensitive element 103 and outputting it as image data.

[0268] The driving device 102 may have an auto-focus function, and its driving method can use a driving system such as a voice coil motor (VCM), microelectromechanical systems (MEMS), piezoelectric systems, shape memory alloys, and liquid lenses. The driving device 102 enables the imaging lens 101 to achieve a better imaging position, allowing clear images to be captured even when the subject is at different object distances or in different temperature environments. In addition, the image capturing device 100 is equipped with a high-sensitivity and low-noise electronic image sensor 103 (such as CMOS or CCD) located on the imaging surface of the imaging optical system lens group, which can truly present the good imaging quality of the imaging optical system lens group.

[0269] The image stabilization module 104 may be, for example, an accelerometer, a gyroscope, or a Hall effect sensor. The drive unit 102 may work in conjunction with the image stabilization module 104 to form an optical image stabilization (OIS) device. By adjusting the changes in different axes of the imaging lens 101, it can compensate for the blurry image caused by shaking during shooting, or use image compensation technology in the imaging software to provide electronic image stabilization (EIS) function, further improving the image quality of shooting in dynamic and low-light scenes.

[0270] <Tenth Embodiment>

[0271] Please refer to Figures 18 to 19 ,in Figure 18 A perspective view of one side of an electronic device according to a tenth embodiment of the present invention is shown, and Figure 19 Draw Figure 18 A three-dimensional diagram of the other side of the electronic device.

[0272] In this embodiment, the electronic device 200 is a smartphone. The electronic device 200 includes image-capturing devices 100, 100a, 100b, and 100c, as well as a display module 201, according to the ninth embodiment. Figure 18 As shown, image capturing devices 100, 100a, and 100b are all located on the same side of the electronic device 200 and are all single-focus. Figure 19 As shown, the image capturing device 100c and the display module 201 are both disposed on the other side of the electronic device 200. The image capturing device 100c can serve as a front-facing lens to provide a selfie function, but the present invention is not limited thereto. Furthermore, the image capturing devices 100a, 100b, and 100c can all include the image capturing optical system lens group of the present invention and can all have a structural configuration similar to that of the image capturing device 100. In detail, each of the image capturing devices 100a, 100b, and 100c can include an imaging lens, a driving device, an electronic photosensitive element, and an image stabilization module. The imaging lens of each of the image capturing devices 100a, 100b, and 100c can include, for example, an optical lens group (the image capturing optical system lens group of the present invention), a lens barrel for supporting the optical lens group, and a support device.

[0273] Image capturing device 100 is a wide-angle image capturing device, image capturing device 100a is a telephoto image capturing device, image capturing device 100b is an ultra-wide-angle image capturing device, and image capturing device 100c is a wide-angle image capturing device. In this embodiment, image capturing devices 100, 100a, and 100b have different viewing angles, allowing the electronic device 200 to provide different magnifications to achieve an optical zoom shooting effect. Furthermore, as... Figure 19 As shown, the opening of the image capturing device 100c can be non-circular, and the optical elements within the image capturing device 100c can have chamfered edges at their outer diameter to accommodate the non-circular opening. This allows for a further reduction in the size of the image capturing device 100c, thereby increasing the area ratio of the display module 201 relative to the electronic device 200 and reducing the thickness of the electronic device 200. The electronic device 200 described above is exemplified by including multiple image capturing devices 100, 100a, 100b, and 100c, but the number and arrangement of the image capturing devices are not intended to limit the invention.

[0274] <Eleventh Embodiment>

[0275] Please refer to Figures 20 to 22 ,in Figure 20 A perspective view of one side of an electronic device according to the eleventh embodiment of the present invention is shown. Figure 21Draw Figure 20 A three-dimensional diagram of the other side of the electronic device, and Figure 22 Draw Figure 20 System block diagram of an electronic device.

[0276] In this embodiment, the electronic device 300 is a smartphone. The electronic device 300 includes, according to the ninth embodiment, image capturing devices 100, 100d, 100e, 100f, and 100g, a flash module 301, a focus assist module 302, an image signal processor 303, a display module 304, and an image software processor 305. Image capturing devices 100 and 100d are both located on the same side of the electronic device 300. The focus assist module 302 may employ a laser rangefinder or a Time-of-Flight (ToF) module, but the present invention is not limited thereto. Image capturing devices 100e, 100f, and 100g, along with display module 304, are all located on the other side of electronic device 300. Display module 304 can serve as a user interface, allowing image capturing devices 100e, 100f, and 100g to function as front-facing lenses for selfies; however, this invention is not limited to this. Furthermore, image capturing devices 100d, 100e, 100f, and 100g can all include the imaging optical system lens group of this invention and can all have a structural configuration similar to that of image capturing device 100. Specifically, each of image capturing devices 100d, 100e, 100f, and 100g can include an imaging lens, a driving device, an electronic photosensitive element, and an image stabilization module. The imaging lenses of imaging devices 100d, 100e, 100f and 100g may each include, for example, an optical lens group of the imaging optical system lens group of the present invention, a lens barrel for carrying the optical lens group and a support device.

[0277] Image capturing device 100 is a wide-angle image capturing device, image capturing device 100d is an ultra-wide-angle image capturing device, image capturing device 100e is a wide-angle image capturing device, image capturing device 100f is an ultra-wide-angle image capturing device, and image capturing device 100g is a time-of-flight ranging image capturing device. In this embodiment, image capturing devices 100 and 100d have different viewing angles, allowing the electronic device 300 to provide different magnifications to achieve optical zoom shooting effects. Additionally, image capturing device 100g can acquire depth information of the image. The above-described electronic device 300 is exemplified by including multiple image capturing devices 100, 100d, 100e, 100f, and 100g, but the number and configuration of the image capturing devices are not intended to limit the invention.

[0278] When the user photographs the subject 306, the electronic device 300 uses the image capturing device 100 or image capturing device 100d to capture the image, activates the flash module 301 for supplemental lighting, and uses the subject distance information of the subject 306 provided by the focus assist module 302 for fast focusing. Furthermore, the image signal processor 303 performs image optimization processing to further improve the image quality produced by the image capturing optical system lens group. The focus assist module 302 can use an infrared or laser focus assist system to achieve fast focusing. In addition, the electronic device 300 can also use the image capturing devices 100e, 100f, or 100g for shooting. The display module 304 can use a touch screen, combined with the diverse functions of the image software processor 305 for image capturing and image processing (or can use a physical shooting button). The image processed by the image software processor 305 can be displayed on the display module 304.

[0279] <Twelfth Embodiment>

[0280] Please refer to Figure 23 A perspective view of one side of an electronic device according to the twelfth embodiment of the present invention is shown.

[0281] In this embodiment, the electronic device 400 is a smartphone. The electronic device 400 includes, according to the ninth embodiment, an image capturing device 100, an image capturing device 100h, an image capturing device 100i, a flash module 401, a focus assist module, an image signal processor, a display module, and an image software processor (not shown). The image capturing devices 100, 100h, and 100i are all located on the same side of the electronic device 400, while the display module is located on the other side. Furthermore, both the image capturing devices 100h and 100i may include the image capturing optical system lens group of the present invention and may have a similar structural configuration to the image capturing device 100, which will not be described in detail here.

[0282] Image capturing device 100 is a wide-angle image capturing device, image capturing device 100h is a telephoto image capturing device, and image capturing device 100i is an ultra-wide-angle image capturing device. In this embodiment, image capturing devices 100, 100h, and 100i have different viewing angles, allowing the electronic device 400 to provide different magnifications to achieve optical zoom shooting effects. Furthermore, image capturing device 100h is a telephoto image capturing device with an optical path deflection element configuration, so that the total length of image capturing device 100h is not limited by the thickness of the electronic device 400. The optical path deflection element configuration of image capturing device 100h can, for example, have a similar... Figures 30 to 32 The structure can be referred to the aforementioned corresponding structure. Figures 30 to 32The description of the above-described electronic device 400 is given as an example, which includes multiple image capturing devices 100, 100h, and 100i, but the number and configuration of the image capturing devices are not intended to limit the present invention. When a user photographs a subject, the electronic device 400 uses the image capturing device 100, the image capturing device 100h, or the image capturing device 100i to focus the light and capture the image, activates the flash module 401 to provide supplementary lighting, and performs subsequent processing in a manner similar to the aforementioned embodiments, which will not be described in detail here.

[0283] <Thirteenth Embodiment>

[0284] Please refer to Figure 24 A perspective view of one side of an electronic device according to the thirteenth embodiment of the present invention is shown.

[0285] In this embodiment, the electronic device 500 is a smartphone. The electronic device 500 includes, according to the ninth embodiment, image capturing devices 100, 100j, 100k, 100m, 100n, 100p, 100q, 100r, and 100s, a flash module 501, a focus assist module, an image signal processor, a display module, and an image software processor (not shown). Image capturing devices 100, 100j, 100k, 100m, 100n, 100p, 100q, 100r, and 100s are all located on the same side of the electronic device 500, while the display module is located on the other side of the electronic device 500. Furthermore, the imaging devices 100j, 100k, 100m, 100n, 100p, 100q, 100r, and 100s can all include the imaging optical system lens group of the present invention and can all have a structural configuration similar to that of the imaging device 100, which will not be described in detail here.

[0286] Image capturing device 100 is a wide-angle image capturing device, image capturing device 100j is a telephoto image capturing device, image capturing device 100k is a telephoto image capturing device, image capturing device 100m is a wide-angle image capturing device, image capturing device 100n is an ultra-wide-angle image capturing device, image capturing device 100p is an ultra-wide-angle image capturing device, image capturing device 100q is a telephoto image capturing device, image capturing device 100r is a telephoto image capturing device, and image capturing device 100s is a time-of-flight ranging image capturing device. In this embodiment, image capturing devices 100, 100j, 100k, 100m, 100n, 100p, 100q, and 100r have different viewing angles, allowing the electronic device 500 to provide different magnifications to achieve an optical zoom shooting effect. Furthermore, the image capturing devices 100j and 100k can be telescopic image capturing devices configured with optical path deflection elements. The optical path deflection element configuration of the image capturing devices 100j and 100k can, for example, have similar... Figures 30 to 32 The structure can be referred to the aforementioned corresponding structure. Figures 30 to 32 The description of the image acquisition device 100s will not be repeated here. Additionally, the image acquisition device 100s can acquire depth information of the image. The electronic device 500 described above is exemplified by including multiple image acquisition devices 100, 100j, 100k, 100m, 100n, 100p, 100q, 100r, and 100s, but the number and configuration of the image acquisition devices are not intended to limit the invention. When a user photographs a subject, the electronic device 500 uses image acquisition devices 100, 100j, 100k, 100m, 100n, 100p, 100q, 100r, or 100s to focus light and acquire an image, activates the flash module 501 for supplemental lighting, and performs subsequent processing in a manner similar to the aforementioned embodiments, which will not be repeated here.

[0287] <Fourteenth Embodiment>

[0288] Please refer to Figure 25 The diagram illustrates a partial internal schematic of a vehicle tool according to the fourteenth embodiment of the present invention.

[0289] In this embodiment, the vehicle tool 600 is a car. The vehicle tool 600 includes the image-capturing device 100 of the ninth embodiment. The image-capturing device 100 is located near the dashboard 601 or center console 602 of the vehicle tool 600, but the invention is not limited thereto. The image-capturing device 100 can serve as a sensing lens facing the driver, for use in a driver monitoring system. It uses an infrared lens to determine the driver's eye gaze direction and closure, or to detect the driver's mental state by observing whether the driver is yawning and their head position. The image detected by the image-capturing device 100 is as follows... Figure 26 As shown, the drawing Figure 25 This is a schematic diagram of the image captured by the imaging device of the vehicle tool when performing its detection function. In this way, it is possible to detect whether the driver is distracted, fatigued, or drowsy and thus unable to drive, and then send a signal to the reminder or warning device (not shown) inside the vehicle tool 600, or send a signal to the management system connected to the vehicle tool 600.

[0290] <Fifteenth Embodiment>

[0291] Please refer to Figure 27 The diagram illustrates a partial internal schematic of a vehicle tool according to the fifteenth embodiment of the present invention.

[0292] In this embodiment, the vehicle tool 700 is a car. The vehicle tool 700 includes the image-capturing device 100 of the ninth embodiment. The image-capturing device 100 is disposed in the rearview mirror 701 or the center console (not shown) of the vehicle tool 700, but the invention is not limited thereto. The image-capturing device 100 can serve as a sensing lens facing the interior of the vehicle. The image detected by the image-capturing device 100 is as follows... Figure 28 As shown, the drawing Figure 27 This is a schematic diagram of the image captured by the imaging device of the vehicle tool when performing its detection function. It can detect the condition of occupants (including the driver and passengers), such as the driver's mental state, passenger gender, whether all occupants are wearing seatbelts, and whether there are any driving-inappropriate situations such as conflicts between the driver and passengers. The system then sends signals to a storage device (not shown) within the vehicle tool 700, or to a management system connected to the vehicle tool 700.

[0293] Furthermore, according to the present invention, the electronic device or vehicle tool may also include a temperature sensor (not shown) near the imaging device to adjust the lens focus according to the ambient temperature. Alternatively, according to the present invention, the electronic device or vehicle tool may include a heat dissipation mechanism in the imaging device to prevent the imaging device from overheating and affecting image quality. The heat dissipation mechanism may be a coating layer of a high heat dissipation material such as diamond-like carbon or graphene, and may also be designed as a microstructure with a high heat dissipation area to effectively enhance the heat dissipation effect.

[0294] The image capturing device of the present invention is not limited to applications in smartphones or vehicle tools. It can also be applied to mobile focusing systems as needed, and features excellent aberration correction and good image quality. For example, the image capturing device can be widely used in electronic devices such as 3D image capture, digital cameras, mobile devices, tablet computers, smart TVs, network monitoring equipment, dashcams, reversing cameras, multi-lens devices, recognition systems, motion-sensing game consoles, and wearable devices. The aforementioned electronic devices are merely illustrative examples of practical applications of the present invention and do not limit the scope of application of the image capturing device of the present invention.

[0295] Although the present invention has been disclosed above with reference to the preferred embodiments described above, it is not intended to limit the present invention. Any person skilled in the art may make some modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of patent protection of the present invention shall be determined by the claims in this specification.

Claims

1. A lens assembly for an image-capturing optical system, characterized in that, It includes four lenses. Along the optical path from the object side to the image side, the four lenses are, in sequence, the first lens, the second lens, the third lens, and the fourth lens. And the four lenses respectively have an object-side surface facing the object side direction and an image-side surface facing the image side direction; Among them, the total number of lenses in the imaging optical system lens group is four. The first lens has a negative refractive power. The image-side surface of the first lens is concave near the optical axis. The second lens has a positive refractive power. The third lens has a positive refractive power. The object-side surface of the third lens is concave near the optical axis. The image-side surface of the third lens is convex near the optical axis. The fourth lens has a negative refractive power. The object-side surface of the fourth lens is convex near the optical axis. The image-side surface of the fourth lens is concave near the optical axis. There is an air gap on the optical axis between the second lens and the third lens in the imaging optical system lens group. The imaging optical system lens group also includes an aperture, and the aperture is located between the second lens and the third lens; Among them, the radius of curvature of the object-side surface of the second lens is R3, the radius of curvature of the image-side surface of the second lens is R4, the focal length of the imaging optical system lens group is f, the thickness of the second lens on the optical axis is CT2, the thickness of the third lens on the optical axis is CT3, the distance from the object-side surface of the second lens to the aperture on the optical axis is Dr3s, the distance from the image-side surface of the second lens to the aperture on the optical axis is Dr4s, and the f-number of the imaging optical system lens group is Fno, which satisfies the following conditions: -1.65 < (R3 + R4) / (R3 - R4); 0.60 < f / (CT2 + CT3) < 2.50; -0.80 < Dr4s / Dr3s < 1.00; and 1.40 < Fno < 2.

50.

2. The imaging optical system lens assembly according to claim 1, characterized in that, The distance between the third lens and the fourth lens on the optical axis is T34. The sum of the distances between all adjacent lenses on the optical axis in the imaging optical system lens group is ΣAT, which satisfies the following conditions: 0 < T34 / ΣAT < 0.

10.

3. The image-capturing optical system lens assembly according to claim 1, characterized in that, The radius of curvature of the object-side surface of the second lens is R3, and the radius of curvature of the object-side surface of the third lens is R5, which satisfies the following conditions: -0.38 < (R3 + R5) / (R3 - R5) < 0.

27.

4. The image-capturing optical system lens assembly according to claim 1, characterized in that, The focal length of the imaging optical system lens group is f, and the focal length of the second lens is f2, which satisfies the following conditions: [[ID= 5. The image-capturing optical system lens assembly according to claim 1, characterized in that, ​ ​ 6. The imaging optical system lens assembly according to claim 1, characterized in that, ​ ​ ​ 7. The image-capturing optical system lens assembly according to claim 1, characterized in that, At least one of the object-side surface and the image-side surface of the fourth lens has at least one inflection point. The distance from the object-side surface of the first lens to the image-side surface of the fourth lens on the optical axis is TD. The distance between the aperture and an imaging surface on the optical axis is SL. The focal length of the imaging optical system lens group is f. The distance between the second lens and the third lens on the optical axis is T23, and they satisfy the following conditions: 0.60 < TD / SL < 1.30; and 2.50 < f / T23 < 15.

0.

8. The image-capturing optical system lens assembly according to claim 1, characterized in that, The distance from the object-side surface of the second lens to the aperture on the optical axis is Dr3s. The distance from the image-side surface of the second lens to the aperture on the optical axis is Dr4s. The distance from the object-side surface of the third lens to the aperture on the optical axis is Dr5s. The distance from the image-side surface of the third lens to the aperture on the optical axis is Dr6s, and they satisfy the following conditions: -0.13 ≤ Dr4s / Dr3s ≤ 0.14; and -0.80 < Dr5s / Dr6s < 1.

00.

9. An image capturing device, characterized in that, Comprising: The imaging optical system lens group according to claim 1; and An electronic photosensitive element disposed on an imaging surface of the imaging optical system lens group.

10. An electronic device, characterized in that, Comprising: The imaging device according to claim 9.

11. A lens assembly for an image-capturing optical system, characterized in that, Comprising four lenses. The four lenses are, in order from the object side to the image side along the optical path, a first lens, a second lens, a third lens, and a fourth lens. And the four lenses respectively have an object-side surface facing the object side and an image-side surface facing the image side; Wherein, the total number of lenses of the imaging optical system lens group is four. The first lens has a negative refractive power. The image-side surface of the first lens is concave near the optical axis. The second lens has a positive refractive power. The third lens has a positive refractive power. The object-side surface of the third lens is concave near the optical axis. The image-side surface of the third lens is convex near the optical axis. The fourth lens has a negative refractive power. The object-side surface of the fourth lens is convex near the optical axis. The image-side surface of the fourth lens is concave near the optical axis. At least one of the object-side surface and the image-side surface of the fourth lens has at least one inflection point. There is an air gap between the second lens and the third lens of the imaging optical system lens group on the optical axis. The imaging optical system lens group further includes an aperture, and the aperture is located between the second lens and the third lens; Wherein, the radius of curvature of the object-side surface of the second lens is R3, the radius of curvature of the image-side surface of the second lens is R4, the distance from the object-side surface of the second lens to the aperture on the optical axis is Dr3s, and the distance from the image-side surface of the second lens to the aperture on the optical axis is Dr4s, and they satisfy the following conditions: -1.40 < (R3 + R4) / (R3 - R4) < 0.80; and -0.80 < Dr4s / Dr3s < 1.

00.

12. The image-capturing optical system lens assembly according to claim 11, characterized in that, The distance from the object side surface of the first lens to the image side surface of the fourth lens on the optical axis is TD, the interval distance from the aperture to an imaging surface on the optical axis is SL, the focal length of the imaging optical system lens group is f, and the interval distance between the second lens and the third lens on the optical axis is T23, which satisfy the following conditions: 0.40<TD / SL<1.50; and 2.50<f / T23<15.

0.

13. The image-capturing optical system lens assembly according to claim 11, characterized in that, The focal length of the imaging optical system lens group is f, and the focal length of the second lens is f2, which satisfy the following conditions: 0.65<f / f2<2.

00.

14. The image-capturing optical system lens assembly according to claim 11, characterized in that, The focal length of the imaging optical system lens group is f, the combined focal length of the second lens and the third lens is f23, and the F-number of the imaging optical system lens group is Fno, which satisfy the following conditions: 0.60<f / f23<1.80; and 1.50<Fno<2.

30.

15. The image-capturing optical system lens assembly according to claim 11, characterized in that, The focal length of the imaging optical system lens group is f, and the radius of curvature of the object side surface of the first lens is R1, which satisfy the following conditions: -0.30<f / R1<0.

50.

16. The image-capturing optical system lens assembly according to claim 11, characterized in that, The interval distance between the second lens and the third lens on the optical axis is T23, and the interval distance between the third lens and the fourth lens on the optical axis is T34, which satisfy the following conditions: 11.0<T23 / T34<19.

0.

17. The image-capturing optical system lens assembly according to claim 11, characterized in that, The radius of curvature of the object side surface of the second lens is R3, and the radius of curvature of the object side surface of the third lens is R5, which satisfy the following conditions: -0.38<(R3+R5) / (R3-R5)<0.

27.

18. The image-capturing optical system lens assembly according to claim 11, characterized in that, The distance from the object side surface of the first lens to the image side surface of the fourth lens on the optical axis is TD, and the thickness of the fourth lens on the optical axis is CT4, which satisfy the following conditions: 6.50<TD / CT4<20.

0.

19. A lens assembly for an image-capturing optical system, characterized in that, It includes four lenses. The four lenses are, in sequence from the object side to the image side along the optical path, the first lens, the second lens, the third lens, and the fourth lens, and the four lenses respectively have an object side surface facing the object side direction and an image side surface facing the image side direction; Among them, the total number of lenses of the imaging optical system lens group is four. The first lens has a negative refractive power. The image side surface of the first lens is concave near the optical axis. The second lens has a positive refractive power. The third lens has a positive refractive power. The object side surface of the third lens is concave near the optical axis. The image side surface of the third lens is convex near the optical axis. The imaging optical system lens group further includes an aperture, and the aperture is located between the second lens and the third lens; Among them, the radius of curvature of the object-side surface of the second lens is R3, the radius of curvature of the image-side surface of the second lens is R4, the radius of curvature of the object-side surface of the fourth lens is R7, the radius of curvature of the image-side surface of the fourth lens is R8, the focal length of the imaging optical system lens group is f, the thickness of the second lens on the optical axis is CT2, the thickness of the third lens on the optical axis is CT3, the thickness of the fourth lens on the optical axis is CT4, the f-number of the imaging optical system lens group is Fno, the distance on the optical axis from the object-side surface of the first lens to the image-side surface of the fourth lens is TD, the distance on the optical axis from the object-side surface of the second lens to the aperture is Dr3s, the distance on the optical axis from the image-side surface of the second lens to the aperture is Dr4s, and they satisfy the following conditions: -2.40 < (R3 + R4) / (R3 - R4) < 15.0; -0.85 < (R7 + R8) / (R7 - R8); 0.60 < f / (CT2 + CT3) < 1.52; 1.40 < Fno < 2.50; 5.00 < TD / CT4 < 22.0; -0.80 < Dr4s / Dr3s < 1.00; and 0.70 < f / R3 < 2.

00.

20. The image-capturing optical system lens assembly according to claim 19, characterized in that, The distance between the third lens and the fourth lens on the optical axis is T34, and the sum of the distances between all adjacent lenses in the imaging optical system lens group on the optical axis is ΣAT, and they satisfy the following conditions: 0 < T34 / ΣAT < 0.

10.

21. The image-capturing optical system lens assembly according to claim 19, characterized in that, The focal length of the imaging optical system lens group is f, the distance between the second lens and the third lens on the optical axis is T23, the distance between the third lens and the fourth lens on the optical axis is T34, and the focal length of the second lens is f2, and they satisfy the following conditions: 2.00 < f / (T23 + T34) < 6.20; and 0.65 < f / f2 < 2.

50.

22. The image-capturing optical system lens assembly according to claim 19, characterized in that, The focal length of the imaging optical system lens group is f, and the radius of curvature of the object-side surface of the second lens is R3, and they satisfy the following conditions: 0.72 ≤ f / R3 ≤ 1.

86.

23. The image-capturing optical system lens assembly according to claim 19, characterized in that, The distance between the second lens and the third lens on the optical axis is T23, and the distance between the third lens and the fourth lens on the optical axis is T34, and they satisfy the following conditions: 11.0 < T23 / T34 < 19.

0.

24. The image-capturing optical system lens assembly according to claim 19, characterized in that, The object-side surface of the fourth lens is convex near the optical axis, the image-side surface of the fourth lens is concave near the optical axis, at least one of the object-side surface and the image-side surface of the fourth lens has at least one inflection point, and the f-number of the imaging optical system lens group is Fno, and they satisfy the following conditions: 1.60 < Fno < 2.

25.

25. The image-capturing optical system lens assembly according to claim 19, characterized in that, The refractive index of the first lens is N1, and the refractive index of the second lens is N2, and they satisfy the following conditions: 1.63 < (N1 + N2) / 2 < 1.

83.

26. The image-capturing optical system lens assembly according to claim 19, characterized in that, The focal length of the lens group in the imaging optical system is f, the distance between the first lens and the second lens on the optical axis is T12, and the distance between the second lens and the third lens on the optical axis is T23, which satisfies the following conditions: 0.55 <f / (T12+T23)<2.85。 27. The image-capturing optical system lens assembly according to claim 19, characterized in that, The distance from the object-side surface of the second lens to the aperture on the optical axis is Dr3s, the distance from the image-side surface of the second lens to the aperture on the optical axis is Dr4s, the distance from the object-side surface of the third lens to the aperture on the optical axis is Dr5s, and the distance from the image-side surface of the third lens to the aperture on the optical axis is Dr6s, satisfying the following conditions: -0.13≤Dr4s / Dr3s≤0.14; as well as -0.80 <Dr5s / Dr6s<1.00。

Images