Optical system lens, image capturing device and electronic device

Abstract

The present application provides an optical system lens, an image capturing device and an electronic device. The optical system lens comprises seven lenses. The seven 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, a fourth lens, a fifth lens, a sixth lens and a seventh lens. The seven lenses respectively have an object side surface facing the object side direction and an image side surface facing the image side direction. The first lens object side surface is concave at a vicinity of an optical axis. The third lens has a positive refractive power. The sixth lens object side surface is convex at a vicinity of the optical axis, and the sixth lens image side surface is concave at a vicinity of the optical axis. The seventh lens image side surface is concave at a vicinity of the optical axis, and the seventh lens image side surface has at least one inflection point. When certain conditions are met, the optical system lens can meet the requirements of miniaturization and high imaging quality at the same time. The image capturing device has the above optical system lens, and the electronic device has the above image capturing device.

Description

Technical Field

[0001] The present invention relates to an optical system lens group, an imaging device, and an electronic device, in particular to an optical system lens group and an imaging device suitable for an electronic device. Background Art

[0002] With the continuous improvement of semiconductor process technology, the performance of electronic photosensitive elements has been improved, and pixels can reach a smaller size. Therefore, optical lenses with high imaging quality have become an essential part.

[0003] With the rapid development of technology, the application range of electronic devices equipped with optical lenses is more extensive, and the requirements for optical lenses are also more diverse. Since it is difficult for existing optical lenses to balance the requirements of imaging quality, sensitivity, aperture size, volume, or viewing angle, the present invention provides an optical lens to meet the requirements. Summary of the Invention

[0004] The present invention provides an optical system lens group, an imaging device, and an electronic device. Among them, the optical system lens group includes seven lenses arranged in sequence along the optical path from the object side to the image side. When specific conditions are met, the optical system lens group provided by the present invention can simultaneously meet the requirements of miniaturization and high imaging quality.

[0005] The present invention provides an optical system lens group, including seven lenses. The seven 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, the fourth lens, the fifth lens, the sixth lens, and the seventh lens. The seven lenses respectively have an object side surface facing the object side direction and an image side surface facing the image side direction. The object side surface of the first lens is concave near the optical axis. The third lens has a positive refractive power. The object side surface of the sixth lens is convex near the optical axis, and the image side surface of the sixth lens is concave near the optical axis. The image side surface of the seventh lens is concave near the optical axis, and the image side surface of the seventh lens has at least one inflection point. The radius of curvature of the image side surface of the sixth lens is R12, the radius of curvature of the image side surface of the seventh lens is R14, the Abbe number of the fourth lens is V, and the Abbe number of the seventh lens is V7, which satisfy the following conditions:

[0006] 0.45 < R12 / R14 < 12; and

[0007] 1.30 < V7 / V4 < 2.60.

[0008] The present invention further provides an optical system lens group, which includes seven lenses. The seven lenses are, in order from the object side to the image side along the optical path, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens. The seven lenses respectively have an object side surface facing the object side direction and an image side surface facing the image side direction. The object side surface of the first lens is concave near the optical axis. The third lens has a positive refractive power. The optical system lens group further includes an aperture. The radius of curvature of the object side surface of the fifth lens is R9, the radius of curvature of the image side surface of the sixth lens is R12, the radius of curvature of the object side surface of the seventh lens is R13, the radius of curvature of the image side surface of the seventh lens is R14, the focal length of the optical system lens group is f, the combined focal length of the first lens and the second lens is f12, 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, the distance between the aperture and the imaging surface on the optical axis is SL, and the thickness of the seventh lens on the optical axis is CT7, which satisfy the following conditions:

[0009] -0.75 < R12 / R14 < 30;

[0010] f / f12 < -0.10;

[0011] 0.03 < (R9 + R13) / (R9 - R13);

[0012] 1.03 < T23 / T34 < 4.60;

[0013] 1.60 < SL / f; and

[0014] 5.40 < f / CT7 < 9.50.

[0015] The present invention further provides an optical system lens group, which includes seven lenses. The seven lenses are, in order from the object side to the image side along the optical path, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens. The seven lenses respectively have an object side surface facing the object side direction and an image side surface facing the image side direction. The object side surface of the first lens is concave near the optical axis. The third lens has a positive refractive power. The fifth lens has a positive refractive power. The radius of curvature of the object side surface of the fifth lens is R9, the radius of curvature of the image side surface of the fifth lens is R10, the radius of curvature of the object side surface of the sixth lens is R11, the radius of curvature of the image side surface of the sixth lens is R12, the radius of curvature of the object side surface of the seventh lens is R13, the radius of curvature of the image side surface of the seventh lens is R14, the focal length of the optical system lens group is f, the combined focal length of the fifth lens and the sixth lens is f56, the combined focal length of the sixth lens and the seventh lens is f67, 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 thickness of the seventh lens on the optical axis is CT7, which satisfy the following conditions:

[0016] -1.25 < R12 / R14;

[0017] -1.50 < f / f56 < 0.68;

[0018] -0.30 < f / f67 < 1.70;

[0019] -0.85 < (R10 + R11) / (R10 - R11) < 1.25;

[0020] (R9 + R13) / (R9 - R13) < 3.00;

[0021] 1.05 < T23 / T34 < 3.70; and

[0022] f / CT7 < 11.5.

[0023] The present invention further provides an optical system lens group, including seven lenses. The seven lenses are, in order from the object side to the image side along the optical path, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens. The seven lenses respectively have an object-side surface facing the object side and an image-side surface facing the image side. The first lens has a negative refractive power, and the object-side surface of the first lens is concave near the optical axis. The object-side surface of the second lens is convex near the optical axis. The third lens has a positive refractive power. The object-side surface of the sixth lens is convex near the optical axis, and the image-side surface of the sixth lens is concave near the optical axis. The object-side surface of the seventh lens is convex near the optical axis, the image-side surface of the seventh lens is concave near the optical axis, and the image-side surface of the seventh lens has at least one inflection point. The radius of curvature of the object-side surface of the first lens is R1, the radius of curvature of the image-side surface of the first lens is R2, the radius of curvature of the object-side surface of the second lens is R3, the focal length of the optical system lens group is f, the focal length of the first lens is f1, the focal length of the seventh lens is f7, the thickness of the fifth lens on the optical axis is CT5, the distance between the fourth lens and the fifth lens on the optical axis is T45, the distance from the object-side surface of the first lens to the imaging surface on the optical axis is TL, and the maximum imaging height of the optical system lens group is ImgH, which satisfies the following conditions:

[0024] (R1 + R2) / (R1 - R2) < 0;

[0025] -0.50 < f / f7 < 0.60;

[0026] 0.50 < CT5 / T45 < 7.50;

[0027] -3.00 < f / f1 < -0.10;

[0028] 0.50 < f / R3 < 1.90; and

[0029] TL / ImgH < 2.00.

[0030] The present invention provides an image capturing device comprising the aforementioned optical system lens group and an electronic photosensitive element, wherein the electronic photosensitive element is disposed on the imaging surface of the optical system lens group.

[0031] The present invention provides an electronic device comprising the aforementioned image capturing device.

[0032] When R12 / R14 meets the above conditions, the ratio of the radius of curvature of the image-side surface of the sixth lens to that of the image-side surface of the seventh lens can be adjusted, which helps to reduce the magnitude of central spherical aberration.

[0033] When V7 / V4 meets the above conditions, the Abbe number ratio of the fourth lens and the seventh lens can be adjusted to reduce chromatic aberration in each field of view.

[0034] When f / f12 meets the above conditions, the overall refractive power of the first lens to the second lens can be adjusted, which helps to achieve a balance between increasing the angle of view and the overall length of the optical system lens group.

[0035] When (R9+R13) / (R9-R13) meets the above conditions, the surface shape and refractive power of the fifth and seventh lenses can be adjusted, which helps to increase the light-gathering quality.

[0036] When T23 / T34 meet the above conditions, the lens spacing between the second lens and the third lens and the ratio of the lens spacing between the third lens and the fourth lens can be adjusted, which helps to reduce the effective radius of the second lens and increase the viewing angle.

[0037] When SL / f meets the above conditions, the distance from the aperture to the imaging plane along the optical axis can be adjusted, which helps to reduce the total optical length and increase the viewing angle.

[0038] When f / CT7 meets the above conditions, the ratio of focal length to the thickness of the seventh lens can be adjusted, which helps to reduce the magnitude of central spherical aberration.

[0039] When f / f56 meets the above conditions, the overall refractive power of the fifth to sixth lenses can be adjusted, which helps to correct astigmatism.

[0040] When f / f67 meets the above conditions, the overall refractive power of the sixth to seventh lenses can be adjusted, which helps to adjust the back focal length.

[0041] When (R10+R11) / (R10-R11) satisfies the above conditions, the surface shape and refractive power of the fifth lens can be adjusted to improve the central chromatic aberration.

[0042] When (R1+R2) / (R1-R2) satisfies the above conditions, the surface shape and refractive power of the first lens can be adjusted, which helps to achieve a balance between the distance from the first lens to the aperture along the optical axis and the size of the viewing angle.

[0043] When f / f7 meets the above conditions, the refractive power of the seventh lens can be adjusted, which helps to increase the quality of central shading and reduce the back focal length.

[0044] When CT5 / T45 meets the above conditions, the ratio of the thickness of the fifth lens to the lens spacing between the fourth and fifth lenses can be adjusted to reasonably configure the position of the fifth lens, which helps to increase the central focusing quality and reduce assembly errors.

[0045] When f / f1 meets the above conditions, the refractive power of the first lens can be adjusted, which helps to increase the viewing angle and reduce the effective radius height of the first lens.

[0046] When f / R3 meets the above conditions, the ratio of focal length to the radius of curvature of the object-side surface of the second lens can be adjusted, which helps to achieve a balance between lens manufacturing yield and central focusing quality.

[0047] When TL / ImgH meets the above conditions, the ratio of total optical length to image height can be adjusted, which helps to achieve a balance between image height and viewing angle.

[0048] The foregoing description of the invention and the following description of the embodiments are intended to demonstrate and explain the spirit and principles of the invention, and to provide a further explanation of the claims. Attached Figure Description

[0049] Figure 1 A schematic diagram of an image-capturing device according to a first embodiment of the present invention is shown.

[0050] Figure 2 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the first embodiment.

[0051] Figure 3 A schematic diagram of an image-capturing device according to a second embodiment of the present invention is shown.

[0052] Figure 4 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the second embodiment.

[0053] Figure 5 A schematic diagram of an image-capturing device according to a third embodiment of the present invention is shown.

[0054] Figure 6 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the third embodiment.

[0055] Figure 7A schematic diagram of an image-capturing device according to a fourth embodiment of the present invention is shown.

[0056] Figure 8 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the fourth embodiment.

[0057] Figure 9 A schematic diagram of an image-capturing device according to a fifth embodiment of the present invention is shown.

[0058] Figure 10 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the fifth embodiment.

[0059] Figure 11 A schematic diagram of an image-capturing device according to a sixth embodiment of the present invention is shown.

[0060] Figure 12 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the sixth embodiment.

[0061] Figure 13 A perspective view of an imaging device according to a seventh embodiment of the present invention is shown.

[0062] Figure 14 A perspective view of one side of an electronic device according to an eighth embodiment of the present invention is shown.

[0063] Figure 15 Draw Figure 14 A three-dimensional diagram of the other side of the electronic device.

[0064] Figure 16 A perspective view of one side of an electronic device according to a ninth embodiment of the present invention is shown.

[0065] Figure 17 Draw Figure 16 A three-dimensional diagram of the other side of the electronic device.

[0066] Figure 18 Draw Figure 16 System block diagram of an electronic device.

[0067] Figure 19 A perspective view of one side of an electronic device according to a tenth embodiment of the present invention is shown.

[0068] Figure 20 A perspective view of one side of an electronic device according to the eleventh embodiment of the present invention is shown.

[0069] Figure 21 A schematic diagram illustrating parameters Y1R1, Y3R1, and the inflection points and some critical points of each lens according to the first embodiment of the present invention is shown.

[0070] Figure 22A schematic diagram illustrating an arrangement of the optical path deflection element according to the present invention in an optical system lens assembly is shown.

[0071] Figure 23 A schematic diagram illustrating another configuration of the optical path reversing element according to the present invention in an optical system lens assembly is shown.

[0072] Figure 24 A schematic diagram illustrating one configuration of two optical path deflection elements in an optical system lens assembly according to the present invention is shown.

[0073] Figure label:

[0074] 1, 2, 3, 4, 5, 6, 100, 100a, 100b, 100c, 100d, 100e, 100f, 100g, 100h, 100i, 100j, 100k, 100m, 100n, 100p, 100q, 100r, 100s: imaging device

[0075] 101: Imaging Lens

[0076] 102: Drive unit

[0077] 103: Electronic photosensitive element

[0078] 104: Image Stabilization Module

[0079] 200, 300, 400, 500: Electronic devices

[0080] 201, 304: Display module

[0081] 301, 401, 501: Flash module

[0082] 302: Focusing Assist Module

[0083] 303: Image Signal Processor

[0084] 305: Image Software Processor

[0085] 306: Subject

[0086] C: Critical point

[0087] P: Inversion point

[0088] OA1: First optical axis

[0089] OA2: Second optical axis

[0090] OA3: Third optical axis

[0091] LF: Optical path switching element

[0092] LF1: First optical path switching element

[0093] LF2: Second optical path switching element

[0094] LG: Lens Group

[0095] ST: Aperture

[0096] S1, S2: Aperture

[0097] E1: First lens

[0098] E2: Second lens

[0099] E3: Third Lens

[0100] E4: Fourth Lens

[0101] E5: Fifth Lens

[0102] E6: Sixth Lens

[0103] E7: Seventh Lens

[0104] E8: Filter element

[0105] IMG: Imaging Surface

[0106] IS: Electronic photosensitive element

[0107] Y1R1: Maximum effective radius of the object-side surface of the first lens

[0108] Y3R1: Maximum effective radius of the object-side surface of the third lens Detailed Implementation

[0109] The optical system comprises seven lenses, which are arranged sequentially from the object side to the image side along the light path as a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. Each of the seven lenses has an object-side surface facing the object side and an image-side surface facing the image side.

[0110] The first lens may have negative refractive power; thereby, it helps to increase the viewing angle and reduce the effective radius height of the first lens. The object-side surface of the first lens is concave near the optical axis; thereby, the focal length of the first lens can be adjusted, which helps to reduce the center thickness of the first lens.

[0111] The object-side surface of the second lens can be convex near the optical axis. This allows it to work in conjunction with the first lens, helping to increase the viewing angle and reduce distortion.

[0112] The third lens has positive refractive power; thus, it can be used in conjunction with the fourth lens to correct aberrations such as spherical aberration. The object-side surface of the third lens can be convex near the optical axis; thus, the shape of the third lens can be adjusted to facilitate the refraction of light rays from a wider angle of view and reduce the size of the effective radius.

[0113] The fifth lens can have positive refractive power; this allows adjustment of the refractive power configuration of the optical system's lens groups, helping to achieve a balance between viewing angle and volume distribution. The object-side surface of the fifth lens can be concave near the optical axis; this allows adjustment of the overall focal length of the fourth and fifth lenses, contributing to the focusing quality of the central optical path. The image-side surface of the fifth lens can be convex near the optical axis; this allows it to work in conjunction with the sixth lens to shorten the back focal length.

[0114] The object-side surface of the sixth lens can be convex near the optical axis; this allows adjustment of the lens's shape, helping to reduce coma in the vicinity of the central optical path. The image-side surface of the sixth lens can be concave near the optical axis; this allows adjustment of the light's direction of travel, helping to match the light angle with the sensor and achieve better image quality.

[0115] The object-side surface of the seventh lens can be convex near the optical axis; this allows adjustment of the lens shape, which helps reduce chromatic aberration in the central field of view. The image-side surface of the seventh lens can be concave near the optical axis; this allows adjustment of the lens shape, which helps reduce the back focal length, thereby reducing the overall length of the optical system's lens group.

[0116] The object-side surface of the first lens may have at least one inflection point; thereby, the effective radius of the first lens can be avoided from being too large, thus effectively controlling the lens volume. The image-side surface of the seventh lens may have at least one inflection point; thereby, it is beneficial to correct the distortion of the peripheral field of view. In addition to the inflection points mentioned above, each lens surface may also have one or more inflection points in various embodiments of the present invention. Please refer to... Figure 21 The diagram illustrates the inflection point P of each lens according to the first embodiment of the present invention.

[0117] The object-side surface of the first lens may have at least one critical point off-axis. This allows for control over the lens aperture size to meet the design requirements of electronic devices. Please refer to... Figure 21 The diagram illustrates a critical point C off-axis on the object-side surface of the first lens E1 according to a first embodiment of the present invention. Figure 21 The critical point of the object-side surface of the first lens in the first embodiment is illustrated as an example. However, in addition to the critical point described above, each lens surface may also have one or more critical points off-axis in various embodiments of the present invention.

[0118] The radius of curvature of the image-side surface of the sixth lens is R12, and the radius of curvature of the image-side surface of the seventh lens is R14, which satisfy the following conditions: -1.25 < R12 / R14. Thereby, the ratio of the radius of curvature of the image-side surface of the sixth lens to the radius of curvature of the image-side surface of the seventh lens can be adjusted, which helps to reduce the magnitude of the central spherical aberration. Among them, the following conditions can also be satisfied: -0.75 < R12 / R14 < 30. Among them, the following conditions can also be satisfied: 0.45 < R12 / R14 < 12. Among them, the following conditions can also be satisfied: 0.70 < R12 / R14 < 11.

[0119] The Abbe number of the fourth lens is V4, and the Abbe number of the seventh lens is V7, which can satisfy the following conditions: 1.30 < V7 / V4 < 2.60. Thereby, the Abbe number ratio of the fourth lens to the seventh lens can be adjusted to reduce the chromatic aberration of each field of view. Among them, the following conditions can also be satisfied: 1.35 < V7 / V4 < 2.50.

[0120] The focal length of the optical system lens group is f, and the combined focal length of the first lens and the second lens is f12, which can satisfy the following conditions: f / f12 < -0.10. Thereby, the overall refractive power from the first lens to the second lens can be adjusted, which helps to balance between increasing the viewing angle and the length of the overall optical system lens group. Among them, the following conditions can also be satisfied: f / f12 < -0.13. Among them, the following conditions can also be satisfied: -0.49 < f / f12. Among them, the following conditions can also be satisfied: -0.49 < f / f12 < -0.10.

[0121] The radius of curvature of the object-side surface of the fifth lens is R9, and the radius of curvature of the object-side surface of the seventh lens is R13, which can satisfy the following conditions: 0.03 < (R9 + R13) / (R9 - R13). Thereby, the surface shape and refractive power of the fifth lens and the seventh lens can be adjusted, which helps to improve the light-gathering quality. Among them, the following conditions can also be satisfied: 0.15 < (R9 + R13) / (R9 - R13). Among them, the following conditions can also be satisfied: (R9 + R13) / (R9 - R13) < 3.00. Among them, the following conditions can also be satisfied: (R9 + R13) / (R9 - R'13) < 2.00. Among them, the following conditions can also be satisfied: 0.20 < (R9 + R13) / (R9 - R13) < 4.00.

[0122] 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 conditions: 1.03 < T23 / T34 < 4.60. Thus, the ratio of the lens spacing between the second lens and the third lens and the lens spacing between the third lens and the fourth lens can be adjusted, which helps to reduce the effective radius of the second lens and increase the viewing angle. Among them, the following conditions can also be satisfied: 1.15 < T23 / T34 < 4.30. Among them, the following conditions can also be satisfied: 1.05 < T23 / T34 < 3.70. Among them, the following conditions can also be satisfied: 1.20 < T23 / T34 < 3.50.

[0123] According to the optical system lens group disclosed in the present invention, it may further include an aperture. The distance between the aperture and the imaging surface on the optical axis is SL, and the focal length of the optical system lens group is f, which can satisfy the following conditions: 1.60 < SL / f. Thus, the distance from the aperture to the imaging surface along the optical axis can be adjusted, which helps to reduce the overall optical length and increase the viewing angle. Among them, the following conditions can also be satisfied: 1.65 < SL / f. Among them, the following conditions can also be satisfied: 1.60 < SL / f < 2.70. Among them, the following conditions can also be satisfied: 1.60 < SL / f < 2.50.

[0124] The focal length of the optical system lens group is f, and the thickness of the seventh lens on the optical axis is CT7, which can satisfy the following conditions: f / CT7 < 11.5. Thus, the ratio of the focal length to the thickness of the seventh lens can be adjusted, which helps to reduce the magnitude of the central spherical aberration. Among them, the following conditions can also be satisfied: f / CT7 < 9.50. Among them, the following conditions can also be satisfied: 5.40 < f / CT7 < 9.50. Among them, the following conditions can also be satisfied: 5.60 < f / CT7 < 9.20.

[0125] The focal length of the optical system lens group is f, and the combined focal length of the fifth lens and the sixth lens is f56, which can satisfy the following conditions: f / f56 < 0.60. Thus, the overall refractive power from the fifth lens to the sixth lens can be adjusted, which helps to correct the astigmatism aberration. Among them, the following conditions can also be satisfied: -1.50 < f / f56 < 0.68. Among them, the following conditions can also be satisfied: -1.20 < f / f56 < 0.55. Among them, the following conditions can also be satisfied: -0.50 < f / f56 < 0.60.

[0126] The focal length of the optical system lens group is f, and the combined focal length of the sixth lens and the seventh lens is f67, which can satisfy the following conditions: -0.30 < f / f67. Thus, the overall refractive power from the sixth lens to the seventh lens can be adjusted, which helps to adjust the back focal length. Among them, the following conditions can also be satisfied: -0.30 < f / f67 < 1.70. Among them, the following conditions can also be satisfied: -0.25 < f / f67 < 1.40.

[0127] The radius of curvature of the image-side surface of the fifth lens is R10, and the radius of curvature of the object-side surface of the sixth lens is R11, which can satisfy the following condition: -0.85 < (R10 + R11) / (R10 - R11) < 1.25. Thereby, the surface shape and refractive power of the fifth lens can be adjusted to improve the magnitude of axial chromatic aberration. Among them, the following condition can also be satisfied: -0.75 < (R10 + R11) / (R10 - R11) < 1.10. Among them, the following condition can also be satisfied: -0.40 < (R10 + R11) / (R10 - R11) < 0.80.

[0128] The radius of curvature of the object-side surface of the first lens is R1, and the radius of curvature of the image-side surface of the first lens is R2, which can satisfy the following condition: (R1 + R2) / (R1 - R2) < 0. Thereby, the surface shape and refractive power of the first lens can be adjusted, which helps to balance the distance from the first lens to the aperture along the optical axis and the viewing angle size. Among them, the following condition can also be satisfied: -2.50 < (R1 + R2) / (R1 - R2) < 0.60. Among them, the following condition can also be satisfied: -2.00 < (R1 + R2) / (R1 - R2) < -0.10.

[0129] The focal length of the optical system lens group is f, and the focal length of the seventh lens is f7, which can satisfy the following condition: -0.50 < f / f7 < 0.60. Thereby, the refractive power of the seventh lens can be adjusted, which helps to increase the central shading quality and reduce the back focal length.

[0130] The thickness of the fifth lens on the optical axis is CT5, and the distance between the fourth lens and the fifth lens on the optical axis is T45, which can satisfy the following condition: 0.50 < CT5 / T45 < 7.50. Thereby, the ratio of the thickness of the fifth lens to the lens spacing from the fourth lens to the fifth lens can be adjusted, the position of the fifth lens can be reasonably arranged, which helps to increase the central light-gathering quality and reduce the assembly error.

[0131] The focal length of the optical system lens group is f, and the focal length of the first lens is f1, which can satisfy the following condition: -3.00 < f / f1 < -0.10. Thereby, the refractive power of the first lens can be adjusted, which helps to increase the viewing angle size and reduce the effective radius height of the first lens. Among them, the following condition can also be satisfied: -1.00 < f / f1 < -0.20.

[0132] The focal length of the 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: 0.50 < f / R3 < 1.90. Thereby, the ratio of the focal length to the radius of curvature of the object-side surface of the second lens can be adjusted, which helps to balance the lens manufacturing qualification rate and the central light-gathering quality.

[0133] The distance from the object side surface of the first lens to the imaging surface on the optical axis is TL, and the maximum imaging height of the optical system lens group is ImgH (which can be half of the total diagonal length of the effective sensing area of the electronic photosensitive element). It can meet the following conditions: TL / ImgH < 2.00. Thus, the ratio of the total optical length to the image height can be adjusted, which helps to balance the image height and the viewing angle size. Among them, the following conditions can also be met: 0.80 < TL / ImgH < 1.60.

[0134] The focal length of the optical system lens group 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. It can meet the following conditions: 2.50 < f / (T12 + T23) < 14.00. Thus, the lens distribution from the first lens to the third lens can be adjusted, which helps to increase the assembly qualification rate. Among them, the following conditions can also be met: 2.50 < f / (T12 + T23) < 10.0.

[0135] The radius of curvature of the object side surface of the first lens is R1, and the radius of curvature of the object side surface of the seventh lens is R13. It can meet the following conditions: -0.50 < (R1 + R13) / (R1 - R13) < 2.50. Thus, the surface shape and refractive power of the first lens and the seventh lens can be adjusted, which helps to reduce the manufacturing cost of the first lens and the seventh lens. Among them, the following conditions can also be met: -0.10 < (R1 + R13) / (R1 - R13) < 1.50. Among them, the following conditions can also be met: 0.10 < (R1 + R13) / (R1 - R13) < 1.00.

[0136] The refractive index of the fourth lens is N4, and the refractive index of the sixth lens is N6. It can meet the following conditions: 1.60 < (N4 + N6) / 2 < 1.85. Thus, the average value of the refractive indices of the fourth lens and the sixth lens can be adjusted, which helps to increase the image height size and the viewing angle size.

[0137] The maximum effective radius of the object side surface of the first lens is Y1R1, and the maximum effective radius of the object side surface of the third lens is Y3R1. It can meet the following conditions: 2.75 < Y1R1 / Y3R1 < 4.70. Thus, the ratio of the effective radii of the first lens and the third lens can be adjusted, which helps to balance reducing the volume, the image height, and the difficulty of mechanism design. Please refer to Figure 21 , there is a schematic diagram showing the parameters Y1R1 and Y3R1 in the first embodiment of the present invention.

[0138] The thickness of the third lens on the optical axis is CT3, and the distance between the fifth lens and the sixth lens on the optical axis is T56, which can satisfy the following condition: 15.0 < CT3 / T56 < 40.0. Thus, the center thickness of the third lens and the lens distance from the fifth lens to the sixth lens can be adjusted, which helps to increase the image height and reduce the length of the overall optical system lens group. Among them, the following condition can also be satisfied: 20.0 < CT3 / T56 < 40.0. Among them, the following condition can also be satisfied: 29.0 < CT3 / T56 < 40.0. <000031�>The focal length of the optical system lens group is f, and the thickness of the second lens on the optical axis is CT2, which can satisfy the following condition: 5.90 < f / CT2 < 11.00. Thus, the ratio of the focal length to the thickness of the second lens can be adjusted, which helps to increase the viewing angle. Among them, the following condition can also be satisfied: 5.90 < f / CT2 < 9.00.

[0140] The focal length of the optical system lens group is f, the thickness of the first lens on the optical axis is CT1, and the thickness of the second lens on the optical axis is CT2, which can satisfy the following condition: 1.50 < f / (CT1 + CT2) < 4.50. Thus, the ratio of the focal length to the total thickness of the first lens and the second lens can be adjusted, which helps to balance between the manufacturing difficulty and the total length of the lens.

[0141] The distance between the first lens and the second lens on the optical axis is T12, 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, the distance between the fourth lens and the fifth lens on the optical axis is T45, the distance between the fifth lens and the sixth lens on the optical axis is T56, and the distance between the sixth lens and the seventh lens on the optical axis is T67, which can satisfy the following condition: 0.55 < (T12 + T23) / (T34 + T45 + T56 + T67) < 1.50. Thus, the ratio of the distance from the first lens to the third lens along the optical axis to the distance from the third lens to the seventh lens along the optical axis can be adjusted, which helps to balance the total optical length, the viewing angle, and the image height.

[0142] The distance between the first lens and the second lens on the optical axis is T12, the distance between the second lens and the third lens on the optical axis is T23, and the sum of the distances between all adjacent lenses in the optical system lens group on the optical axis is ΣAT, which can satisfy the following condition: 0.30 < (T12 + T23) / ΣAT < 0.70. Thus, the ratio of the distance from the first lens to the third lens along the optical axis to the total sum of the lens distances in the overall optical system lens group can be adjusted, which helps to balance the distribution between the lenses and reduce the collision between the lenses during assembly.

[0143] Half of the maximum viewing angle in the optical system lens group is HFOV, which can satisfy the following conditions: 59.0 [degrees] < HFOV < 73.0 [degrees]. Thereby, the viewing angle size can be adjusted, which helps to obtain a wider imaging range.

[0144] The refractive index of the second lens is N2, and the refractive index of the fourth lens is N4, which can satisfy the following conditions: 1.60 < (N2 + N4) / 2 < 1.72. Thereby, the average refractive index of the second lens and the fourth lens can be adjusted, which helps to reduce the effective radius height from the first lens to the fourth lens and reduce the mechanism design difficulty.

[0145] The Abbe number of the first lens is V1, the Abbe number of the second lens is V2, the Abbe number of the third lens is V3, the Abbe number of the fourth lens is V4, the Abbe number of the fifth lens is V5, the Abbe number of the sixth lens is V6, the Abbe number of the seventh lens is V7, the Abbe number of the i-th lens is Vi, the refractive index of the first lens is N1, the refractive index of the second lens is N2, the refractive index of the third lens is N3, the refractive index of the fourth lens is N4, the refractive index of the fifth lens is N5, the refractive index of the sixth lens is N6, the refractive index of the seventh lens is N7, the refractive index of the i-th lens is Ni. At least one lens in the optical system lens group can satisfy the following conditions: 5.0 < Vi / Ni < 11.9, where i = 1, 2, 3, 4, 5, 6 or 7. Thereby, it helps to adjust the chromatic aberration of the peripheral field of view and increase the imaging size.

[0146] The maximum value of the thickness of a single lens on the optical axis among all the lenses in the optical system lens group is CT_MAX, and the focal length of the optical system lens group is f, which can satisfy the following conditions: 0.30 < CT_MAX / f < 0.50. Thereby, the ratio of the focal length to the maximum lens spacing can be adjusted, which helps to balance the lens spacing ratio and reduce the assembly error.

[0147] Each of the technical features in the optical system lens group disclosed in the present invention can be combined and configured to achieve the corresponding effects.

[0148] In the 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 degree of the refractive power configuration of the optical system lens group can be increased, and the influence of the external environmental temperature change 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 or an aspherical surface (ASP) can be set on the lens surface. The spherical lens can reduce the manufacturing difficulty. If an aspherical surface is set on the lens surface, more control variables can be obtained thereby to reduce aberration, reduce the number of lenses, and effectively reduce the total length of the 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.

[0149] In the optical system lens assembly disclosed in this invention, if the lens surface is aspherical, it means that all or part of the optically effective area of ​​the lens surface is aspherical.

[0150] In the optical system lens assembly disclosed in this invention, additives can be selectively added to any (or more) lens materials to produce light absorption or interference effects, thereby altering the lens's transmittance for specific wavelengths of light and reducing stray light and color shift. For example, the additives may filter out light in the 600 nm to 800 nm wavelength range to help reduce excess red or infrared light; or they may filter out light in the 350 nm to 450 nm wavelength range to reduce excess blue or ultraviolet light. Therefore, the additives can prevent specific wavelengths of light from interfering with imaging. Furthermore, the additives can be uniformly mixed into plastic and manufactured into lenses using injection molding technology. Additionally, the additives can also be deposited on the lens surface as a coating to provide the aforementioned effects.

[0151] In the 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.

[0152] In the 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.

[0153] In the optical system lens assembly disclosed in this invention, the imaging surface of the 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.

[0154] In the 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 type (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.

[0155] In the 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 object and the imaging plane in the imaging optical path. This provides a higher degree of spatial flexibility in the optical system lens assembly, allowing the thinning and lightening of electronic devices to be unrestricted by the total optical length of the optical system lens assembly. For further explanation, please refer to... Figure 22 and Figure 23 ,in Figure 22 A schematic diagram illustrating an arrangement of the optical path reversing element according to the present invention in an optical system lens assembly is shown. Figure 23 A schematic diagram illustrating another configuration of the optical path deflection element according to the present invention in an optical system lens assembly is shown. For example... Figure 22 and Figure 23 As shown, the optical system lens assembly can travel along the light path from the subject (not shown) to the imaging plane IMG, and sequentially includes a first optical axis OA1, a light path deflection element LF, and a second optical axis OA2, wherein the light path deflection element LF can be as follows: Figure 22 As shown, it is positioned between the subject and the lens group LG of the optical system, or as... Figure 23 The lens group LG is positioned between the lens assembly of the optical system and the imaging plane IMG, as shown. Additionally, please refer to... Figure 24 A schematic diagram illustrating an arrangement of two optical path deflection elements according to the present invention in an optical system lens assembly is shown, such as... Figure 24 As shown, the 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 optical system lens assembly, and the second optical path reversing element LF2 is positioned between the lens group LG of the 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 24 The direction shown is the same as the direction of light travel along the third optical axis OA3. The 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.

[0156] In the optical system lens assembly disclosed in this invention, at least one aperture stop may be provided, which may be located before 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.

[0157] In the 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 optical system lens assembly.

[0158] 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 masking materials. 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.

[0159] Based on the above implementation methods, specific embodiments are presented below and described in detail with reference to the accompanying drawings.

[0160] <First Embodiment>

[0161] 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 optical system lens group (unlabeled) and an electronic photosensitive element IS. The 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, an aperture stop S1, a fifth lens E5, a sixth lens E6, an aperture stop S2, a seventh lens E7, a filter element E8, and an imaging surface IMG. The electronic photosensitive element IS is disposed on the imaging surface IMG. The optical system lens group comprises seven lenses (E1, E2, E3, E4, E5, E6, and E7), and there are no other interposed lenses between the lenses.

[0162] 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 convex near the optical axis. Both of its surfaces are aspherical. Its object-side surface has two inflection points, and its image-side surface has two inflection points. Its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0163] 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 concave near the optical axis. Both of its surfaces are aspherical.

[0164] The third lens E3 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, and its object-side surface has a point of inflection.

[0165] The fourth lens E4 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 one inflection point, its image-side surface has four inflection points, and its image-side surface has a critical point off-axis.

[0166] The fifth lens E5 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. Its object-side surface has two inflection points, and its image-side surface also has two inflection points.

[0167] The sixth lens E6 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 object-side surface has two inflection points, and its image-side surface has two inflection points. Its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0168] The seventh lens E7 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 four inflection points, and its image-side surface has two inflection points. Its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0169] The filter element E8 is made of glass and is located between the seventh lens E7 and the imaging plane IMG. It does not affect the focal length of the optical system lens group.

[0170] The equations for the aspherical surfaces of the above lenses are expressed as follows:

[0171]

[0172] 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;

[0173] Y: The perpendicular distance between a point on the aspherical curve and the optical axis;

[0174] R: Radius of curvature;

[0175] k: cone coefficient; and

[0176] Ai: The i-th order aspherical coefficient.

[0177] In the optical system lens group of the first embodiment, the focal length of the optical system lens group is f, the aperture value (F-number) of the optical system lens group is Fno, and half of the maximum angle of view in the optical system lens group is HFOV, with the following values: f = 3.08 mm, Fno = 2.25, HFOV = 59.52 degrees.

[0178] The maximum thickness of a single lens along the optical axis in the optical system lens group is CT_MAX. The focal length of the optical system lens group is f, which satisfies the following condition: CT_MAX / f = 0.34. In this embodiment, the thickness of the third lens E3 along the optical axis is greater than the thickness of each of the other lenses in the optical system lens group along the optical axis; therefore, CT_MAX is equal to the thickness of the third lens E3 along the optical axis.

[0179] The thickness of the third lens E3 on the optical axis is CT3, and the distance between the fifth lens E5 and the sixth lens E6 on the optical axis is T56, which satisfies the following condition: CT3 / T56 = 35.40. In this embodiment, the distance between two adjacent lenses on the optical axis refers to the distance between two adjacent mirror surfaces of the two adjacent lenses on the optical axis.

[0180] The focal length of the lens group in the optical system is f, the thickness of the first lens E1 on the optical axis is CT1, and the thickness of the second lens E2 on the optical axis is CT2. They satisfy the following condition: f / (CT1+CT2)=3.05.

[0181] The focal length of the lens group in the optical system is f, and the thickness of the second lens E2 on the optical axis is CT2, which satisfies the following condition: f / CT2=7.21.

[0182] The thickness of the fifth lens E5 on the optical axis is CT5, and the distance between the fourth lens E4 and the fifth lens E5 on the optical axis is T45, which satisfies the following condition: CT5 / T45=3.01.

[0183] The focal length of the lens group in the optical system is f, and the thickness of the seventh lens E7 on the optical axis is CT7, which satisfies the following condition: f / CT7=7.24.

[0184] The focal length of the lens group in the optical system is f, and the combined focal length of the first lens E1 and the second lens E2 is f12, which satisfies the following condition: f / f12=-0.16.

[0185] The focal length of the lens group in the optical system is f, and the combined focal length of the fifth lens E5 and the sixth lens E6 is f56, which satisfies the following condition: f / f56=0.45.

[0186] The focal length of the lens group in the optical system is f, and the combined focal length of the sixth lens E6 and the seventh lens E7 is f67, which satisfies the following condition: f / f67=-0.11.

[0187] The focal length of the lens group in the optical system is f, and the focal length of the first lens E1 is f1, which satisfies the following condition: f / f1=-0.39.

[0188] The focal length of the lens group in the optical system is f, and the focal length of the seventh lens E7 is f7, which satisfies the following condition: f / f7=-0.16.

[0189] The focal length of the lens group in the 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=1.39.

[0190] The focal length of the lens group of the 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. They satisfy the following condition: f / (T12+T23)=4.54.

[0191] The refractive index of the second lens E2 is N2, and the refractive index of the fourth lens E4 is N4. They satisfy the following condition: (N2+N4) / 2=1.65.

[0192] The refractive index of the fourth lens E4 is N4, and the refractive index of the sixth lens E6 is N6. They satisfy the following condition: (N4+N6) / 2=1.62.

[0193] The radius of curvature of the object-side surface of the first lens E1 is R1, and the radius of curvature of the object-side surface of the seventh lens E7 is R13, which satisfies the following condition: (R1+R13) / (R1-R13)=0.53.

[0194] The radius of curvature of the object-side surface of the first lens E1 is R1, and the radius of curvature of the image-side surface of the first lens E1 is R2, which satisfies the following condition: (R1+R2) / (R1-R2)=-1.33.

[0195] The radius of curvature of the image-side surface of the fifth lens E5 is R10, and the radius of curvature of the object-side surface of the sixth lens E6 is R11. They satisfy the following condition: (R10+R11) / (R10-R11)=0.03.

[0196] The radius of curvature of the image-side surface of the sixth lens E6 is R12, and the radius of curvature of the image-side surface of the seventh lens E7 is R14, which satisfies the following condition: R12 / R14=2.16.

[0197] The radius of curvature of the object-side surface of the fifth lens E5 is R9, and the radius of curvature of the object-side surface of the seventh lens E7 is R13, which satisfies the following condition: (R9+R13) / (R9-R13)=0.51.

[0198] The optical axis spacing between the first lens E1 and the second lens E2 is T12, and the optical axis spacing between the second lens E2 and the third lens E3 is T23. The sum of the optical axis spacing between all adjacent lenses in the optical system is ΣAT, which satisfies the following condition: (T12+T23) / ΣAT=0.42. In this embodiment, ΣAT is the sum of the optical axis spacing between any two adjacent lenses among the first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, and seventh lens E7.

[0199] The optical axis spacing between the first lens E1 and the second lens E2 is T12, the optical axis spacing between the second lens E2 and the third lens E3 is T23, the optical axis spacing between the third lens E3 and the fourth lens E4 is T34, the optical axis spacing between the fourth lens E4 and the fifth lens E5 is T45, the optical axis spacing between the fifth lens E5 and the sixth lens E6 is T56, and the optical axis spacing between the sixth lens E6 and the seventh lens E7 is T67. These conditions satisfy the following: (T12+T23) / (T34+T45+T56+T67)=0.72.

[0200] 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=1.39.

[0201] The distance on the optical axis from the object-side surface of the first lens E1 to the imaging plane IMG is TL, and the maximum imaging height of the optical system lens group is ImgH, which satisfies the following condition: TL / ImgH=1.40.

[0202] The distance between the aperture ST and the imaging plane IMG on the optical axis is SL, and the focal length of the lens group of the optical system is f, which satisfies the following condition: SL / f = 1.78.

[0203] The Abbe number of the fourth lens E4 is V4, and the Abbe number of the seventh lens E7 is V7, which satisfies the following condition: V7 / V4 = 2.04.

[0204] The Abbe number of the first lens E1 is V1, the Abbe number of the second lens E2 is V2, the Abbe number of the third lens E3 is V3, the Abbe number of the fourth lens E4 is V4, the Abbe number of the fifth lens E5 is V5, the Abbe number of the sixth lens E6 is V6, and the Abbe number of the seventh lens E7 is V7. The refractive index of the first lens E1 is N1, the refractive index of the second lens E2 is N2, the refractive index of the third lens E3 is N3, the refractive index of the fourth lens E4 is N4, the refractive index of the fifth lens E5 is N5, the refractive index of the sixth lens E6 is N6, and the refractive index of the seventh lens E7 is N7. These conditions must be met: V1 / N1 = 36.30; V2 / N2 = 15.85; V3 / N3 = 36.26; V4 / N4 = 10.90; V5 / N5 = 36.26; V6 / N6 = 36.26; and V7 / N7 = 23.91.

[0205] The maximum effective radius of the object-side surface of the first lens E1 is Y1R1, and the maximum effective radius of the object-side surface of the third lens E3 is Y3R1, which satisfies the following condition: Y1R1 / Y3R1=3.47.

[0206] Please refer to Table 1 and Table 2 below.

[0207]

[0208]

[0209]

[0210]

[0211]

[0212] 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 20 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 A30 represent the 4th to 30th 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.

[0213] <Second Embodiment>

[0214] 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 3 It is known that the image capturing device 2 includes an optical system lens group (unlabeled) and an electronic photosensitive element IS. The 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, an aperture stop S1, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter element E8, and an imaging surface IMG. The electronic photosensitive element IS is disposed on the imaging surface IMG. The optical system lens group comprises seven lenses (E1, E2, E3, E4, E5, E6, and E7), and there are no other interposed lenses between the lenses.

[0215] 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 convex near the optical axis. Both of its surfaces are aspherical. Its object-side surface has two inflection points, and its image-side surface has two inflection points. Its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0216] 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 concave near the optical axis. Both of its surfaces are aspherical.

[0217] The third lens E3 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, and its object-side surface has a point of inflection.

[0218] The fourth lens E4 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 three inflection points, and its image-side surface has a critical point off-axis.

[0219] The fifth lens E5 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. Its object-side surface has four inflection points, and its image-side surface has two inflection points. Its object-side surface has two critical points off-axis, and its image-side surface has two critical points off-axis.

[0220] The sixth lens E6 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. Its object-side surface has five inflection points, and its image-side surface has two inflection points. Its object-side surface has one critical point off-axis, and its image-side surface has two critical points off-axis.

[0221] The seventh lens E7 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 three inflection points, and its image-side surface has two inflection points. Its object-side surface has one critical point off-axis, and its image-side surface has two critical points off-axis.

[0222] The filter element E8 is made of glass and is located between the seventh lens E7 and the imaging plane IMG. It does not affect the focal length of the optical system lens group.

[0223] Please refer to Table 3 and Table 4 below.

[0224]

[0225]

[0226]

[0227]

[0228] 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.

[0229]

[0230]

[0231] <Third Embodiment>

[0232] 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 optical system lens group (unlabeled) and an electronic photosensitive element IS. The 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, an aperture stop S1, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter element E8, and an imaging surface IMG. The electronic photosensitive element IS is disposed on the imaging surface IMG. The optical system lens group comprises seven lenses (E1, E2, E3, E4, E5, E6, and E7), and there are no other interposed lenses between the lenses.

[0233] 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 convex near the optical axis. Both of its surfaces are aspherical. Its object-side surface has two inflection points, and its image-side surface has two inflection points. Its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0234] 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 concave near the optical axis. Both of its surfaces are aspherical.

[0235] The third lens E3 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, and its object-side surface has a point of inflection.

[0236] 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 one inflection point, its image-side surface has two inflection points, and its object-side surface has a critical point off-axis.

[0237] The fifth lens E5 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. Its object-side surface has a point of inflection, its image-side surface has a point of inflection, and its object-side surface has a critical point off-axis.

[0238] The sixth lens E6 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. Its object-side surface has two inflection points, and its image-side surface has one inflection point. Its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0239] The seventh lens E7 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 three inflection points, and its image-side surface has three inflection points. Its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0240] The filter element E8 is made of glass and is located between the seventh lens E7 and the imaging plane IMG. It does not affect the focal length of the optical system lens group.

[0241] Please refer to Table 5 and Table 6 below.

[0242]

[0243]

[0244]

[0245]

[0246] 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.

[0247]

[0248]

[0249] <Fourth Embodiment>

[0250] 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 optical system lens group (unlabeled) and an electronic photosensitive element IS. The 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, an aperture stop S1, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter element E8, and an imaging surface IMG. The electronic photosensitive element IS is disposed on the imaging surface IMG. The optical system lens group comprises seven lenses (E1, E2, E3, E4, E5, E6, and E7), and there are no other interposed lenses between the lenses.

[0251] 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 convex near the optical axis. Both of its surfaces are aspherical. Its object-side surface has two inflection points, and its image-side surface has two inflection points. Its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0252] 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 concave near the optical axis. Both of its surfaces are aspherical.

[0253] The third lens E3 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, and its object-side surface has a point of inflection.

[0254] The fourth lens E4 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.

[0255] The fifth lens E5 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. Its object-side surface has a point of inflection, its image-side surface has a point of inflection, and its object-side surface has a critical point off-axis.

[0256] The sixth lens E6 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. Its object-side surface has two inflection points, and its image-side surface has one inflection point. Its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0257] The seventh lens E7 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 three inflection points, and its image-side surface has one inflection point. Its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0258] The filter element E8 is made of glass and is located between the seventh lens E7 and the imaging plane IMG. It does not affect the focal length of the optical system lens group.

[0259] Please refer to Tables 7 and 8 below.

[0260]

[0261]

[0262]

[0263]

[0264] 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.

[0265]

[0266]

[0267] <Fifth Embodiment>

[0268] Please refer to Figures 9 to 10 ,in Figure 9A 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 optical system lens group (unlabeled) and an electronic photosensitive element IS. The 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, an aperture stop S1, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter element E8, and an imaging surface IMG. The electronic photosensitive element IS is disposed on the imaging surface IMG. The optical system lens group comprises seven lenses (E1, E2, E3, E4, E5, E6, and E7), and there are no other interposed lenses between each lens.

[0269] 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 a point of inflection, its image-side surface has a point of inflection, and its object-side surface has a critical point off-axis.

[0270] The second lens E2 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 a point of inflection.

[0271] The third lens E3 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.

[0272] 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 one inflection point, its image-side surface has two inflection points, and its object-side surface has a critical point off-axis.

[0273] The fifth lens E5 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. Its object-side surface has a point of inflection, and its image-side surface also has a point of inflection.

[0274] The sixth lens E6 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, its image-side surface has a point of inflection, its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0275] The seventh lens E7 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 of its surfaces are aspherical. Its object-side surface has four inflection points, and its image-side surface has two inflection points. Its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0276] The filter element E8 is made of glass and is located between the seventh lens E7 and the imaging plane IMG. It does not affect the focal length of the optical system lens group.

[0277] Please refer to Tables 9 and 10 below.

[0278]

[0279]

[0280]

[0281]

[0282] 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.

[0283]

[0284]

[0285] <Sixth Embodiment>

[0286] 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 optical system lens group (unlabeled) and an electronic photosensitive element IS. The 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, an aperture stop S1, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter element E8, and an imaging surface IMG. The electronic photosensitive element IS is disposed on the imaging surface IMG. The optical system lens group comprises seven lenses (E1, E2, E3, E4, E5, E6, and E7), and there are no other interposed lenses between the lenses.

[0287] 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 convex near the optical axis. Both of its surfaces are aspherical. Its object-side surface has two inflection points, and its image-side surface has two inflection points. Its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0288] 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 concave near the optical axis. Both surfaces are aspherical, and its object-side surface has two inflection points.

[0289] The third lens E3 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, and its object-side surface has a point of inflection.

[0290] The fourth lens E4 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 image-side surface has two inflection points, and its image-side surface has a critical point off-axis.

[0291] The fifth lens E5 has positive refractive power and is made of glass. 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. Its object-side surface has a point of inflection, its image-side surface has a point of inflection, and its object-side surface has a critical point off-axis.

[0292] The sixth lens E6 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 of its surfaces are aspherical. Its object-side surface has a point of inflection, its image-side surface has a point of inflection, its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0293] The seventh lens E7 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, its image-side surface has a point of inflection, its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0294] The filter element E8 is made of glass and is located between the seventh lens E7 and the imaging plane IMG. It does not affect the focal length of the optical system lens group.

[0295] Please refer to Table 11 and Table 12 below.

[0296]

[0297]

[0298]

[0299]

[0300] 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.

[0301]

[0302]

[0303] <Seventh Embodiment>

[0304] Please refer to Figure 13 This diagram illustrates a perspective view of an image-capturing device according to a seventh 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 optical system lens group of the first embodiment described above, a lens barrel (not otherwise labeled) for carrying the optical system lens group, and a support device (Holder Member, not otherwise labeled). The imaging lens 101 can also be replaced with the 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.

[0305] 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, and shape memory alloys. The driving device 102 enables the imaging lens 101 to achieve a better imaging position, allowing clear images to be captured of the subject at different object distances. 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 optical system lens group, which can truly present the good imaging quality of the optical system lens group.

[0306] The image stabilization module 104 can be, for example, an accelerometer, a gyroscope, or a Hall effect sensor. The drive unit 102 can 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 image software to provide electronic image stabilization (EIS) function, further improving the image quality of shooting in dynamic and low-light scenes.

[0307] <Eighth Embodiment>

[0308] Please refer to Figures 14 to 15 ,in Figure 14 A perspective view of one side of an electronic device according to an eighth embodiment of the present invention is shown, and Figure 15 Draw Figure 14 A three-dimensional diagram of the other side of the electronic device.

[0309] 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 seventh embodiment. Figure 14 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 15 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 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 optical system lens group of the present invention), a lens barrel for supporting the optical lens group, and a support device.

[0310] 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 15 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, facilitating an increase in 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.

[0311] <Ninth Embodiment>

[0312] Please refer to Figures 16 to 18 ,in Figure 16 A perspective view of one side of an electronic device according to a ninth embodiment of the present invention is shown. Figure 17 Draw Figure 16 A three-dimensional diagram of the other side of the electronic device, and Figure 18 Draw Figure 16 System block diagram of an electronic device.

[0313] In this embodiment, the electronic device 300 is a smartphone. The electronic device 300 includes, according to the seventh 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 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 optical system lens group of the present invention, a lens barrel for carrying the optical lens group and a support device.

[0314] 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.

[0315] 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 optical system lens group. The focus assist module 302 can use an infrared or laser focus assist system to achieve fast focusing. Alternatively, 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.

[0316] <Tenth Embodiment>

[0317] Please refer to Figure 19 The diagram shows a perspective view of one side of an electronic device according to the tenth embodiment of the present invention.

[0318] In this embodiment, the electronic device 400 is a smartphone. The electronic device 400 includes, according to the seventh 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 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.

[0319] 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 22 to 24 The structure can be referred to the aforementioned corresponding structure. Figures 22 to 24The 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.

[0320] <Eleventh Embodiment>

[0321] Please refer to Figure 20 A perspective view of one side of an electronic device according to the eleventh embodiment of the present invention is shown.

[0322] In this embodiment, the electronic device 500 is a smartphone. The electronic device 500 includes, according to the seventh 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 image capturing devices 100j, 100k, 100m, 100n, 100p, 100q, 100r, and 100s can all include the optical system lens group of the present invention and can all have a structural configuration similar to that of the image capturing device 100, which will not be described in detail here.

[0323] 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 22 to 24 The structure can be referred to the aforementioned corresponding structure. Figures 22 to 24 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.

[0324] The image capturing device of this invention is not limited to smartphones. It can also be applied to mobile focusing systems as needed, offering both excellent aberration correction and good image quality. For example, the image capturing device can be used in various electronic devices such as 3D image acquisition, 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 this invention and do not limit the scope of application of the image capturing device.

[0325] 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 scope defined in the claims of the present invention.

Claims

1. An optical system lens assembly, characterized in that, It comprises seven lenses, which are arranged sequentially from the object side to the image side along the light path as a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens, and each of the seven 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 the object-side surface of the first lens is concave near the optical axis. The third lens has positive refractive power, the fifth lens has positive refractive power, the object-side surface of the sixth lens is convex near the optical axis, the image-side surface of the sixth lens is concave near the optical axis, and the image-side surface of the seventh lens is concave near the optical axis, and the image-side surface of the seventh lens has at least one inflection point. Wherein, the radius of curvature of the image-side surface of the sixth lens is R12, the radius of curvature of the image-side surface of the seventh lens is R14, the Abbe number of the fourth lens is V4, the Abbe number of the seventh lens is V7, the focal length of the lens group of the optical system is f, and the thickness of the seventh lens on the optical axis is CT7, which satisfies the following conditions: 0.45 < R12 / R14 < 12; 1.30 < V7 / V4 < 2.60; and 5.40 < f / CT7 < 9.

50.

2. The optical system lens assembly as described in claim 1, characterized in that, The object-side surface of the first lens has at least one critical point off-axis, the radius of curvature of the object-side surface of the first lens is R1, and the radius of curvature of the image-side surface of the first lens is R2, satisfying the following conditions: -2.50 < (R1+R2) / (R1-R2) < 0.

60.

3. The optical system lens assembly as described in claim 1, characterized in that, The object-side surface of the third lens is convex near the optical axis.

4. The optical system lens assembly as described in claim 1, characterized in that, The focal length of the lens group in the 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: 2.50 < f / (T12+T23) < 14.

00.

5. The optical system lens assembly as described in claim 1, characterized in that, It also includes an aperture, wherein the distance between the aperture and an imaging plane on the optical axis is SL, and the focal length of the lens group of the optical system is f, which satisfies the following condition: 1.60 < SL / f < 2.

50.

6. The optical system lens assembly as described in claim 1, characterized in that, The radius of curvature of the object-side surface of the first lens is R1, and the radius of curvature of the object-side surface of the seventh lens is R13, which satisfy the following conditions: -0.50 < (R1+R13) / (R1-R13) < 2.

50.

7. The optical system lens assembly as described in claim 1, characterized in that, The fourth lens has a refractive index of N4, and the sixth lens has a refractive index of N6, satisfying the following conditions: 1.60 < (N4+N6) / 2 < 1.

85.

8. An image capturing device, characterized in that, Include: The optical system lens assembly as described in claim 1; and An electronic photosensitive element is disposed on an imaging surface of the lens group of the optical system.

9. An electronic device, characterized in that, Include: The imaging device as described in claim 8.

10. An optical system lens assembly, characterized in that, It comprises seven lenses, which are arranged sequentially from the object side to the image side along the light path as a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens, and each of the seven 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 the object-side surface of the first lens is concave near the optical axis. The third lens has positive refractive power, and the fifth lens has positive refractive power. The optical system lens group further includes an aperture; the radius of curvature of the object-side surface of the fifth lens is R9; the radius of curvature of the image-side surface of the sixth lens is R12; the radius of curvature of the object-side surface of the seventh lens is R13; the radius of curvature of the image-side surface of the seventh lens is R14; the focal length of the optical system lens group is f; the combined focal length of the first and second lenses is f12; the distance between the second and third lenses on the optical axis is T23; the distance between the third and fourth lenses on the optical axis is T34; the distance between the aperture and an imaging plane on the optical axis is SL; and the thickness of the seventh lens on the optical axis is CT7, which satisfies the following conditions: -0.75 < R12 / R14 < 30; f / f12 < -0.10; 0.03 < (R9+R13) / (R9-R13); 1.03 < T23 / T34 < 4.60; 1.60 < SL / f; and 5.40 < f / CT7 < 9.

50.

11. The optical system lens assembly as described in claim 10, characterized in that, The maximum effective radius of the object-side surface of the first lens is Y1R1, and the maximum effective radius of the object-side surface of the third lens is Y3R1, which satisfy the following conditions: 2.75 < Y1R1 / Y3R1 < 4.

70.

12. The optical system lens assembly as described in claim 10, characterized in that, The thickness of the third lens on the optical axis is CT3, and the distance between the fifth and sixth lenses on the optical axis is T56, which satisfies the following conditions: 15.0 < CT3 / T56 < 40.

0.

13. The optical system lens assembly as described in claim 10, characterized in that, The focal length of the lens group in the optical system is f, and the thickness of the second lens on the optical axis is CT2, which satisfies the following conditions: 5.90 < f / CT2 < 11.

00.

14. The optical system lens assembly as described in claim 10, characterized in that, The focal length of the lens group in the optical system is f, and the combined focal length of the fifth lens and the sixth lens is f56, which satisfies the following conditions: f / f56 < 0.

60.

15. The optical system lens assembly as described in claim 10, characterized in that, The focal length of the lens group in the optical system is f, the thickness of the first lens along the optical axis is CT1, and the thickness of the second lens along the optical axis is CT2, satisfying the following conditions: 1.50 < f / (CT1+CT2) < 4.

50.

16. The optical system lens assembly as described in claim 10, characterized in that, The radius of curvature of the object-side surface of the first lens is R1, and the radius of curvature of the image-side surface of the first lens is R2, which satisfy the following conditions: -2.50 < (R1+R2) / (R1-R2) < 0.

60.

17. An optical system lens assembly, characterized in that, It comprises seven lenses, which are arranged sequentially from the object side to the image side along the light path as a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens, and each of the seven 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 the object-side surface of the first lens is concave near the optical axis. The third lens has positive refractive power, and the fifth lens has positive refractive power. Wherein, the radius of curvature of the object-side surface of the fifth lens is R9, the radius of curvature of the image-side surface of the fifth lens is R10, the radius of curvature of the object-side surface of the sixth lens is R11, the radius of curvature of the image-side surface of the sixth lens is R12, the radius of curvature of the object-side surface of the seventh lens is R13, the radius of curvature of the image-side surface of the seventh lens is R14, the focal length of the lens group of the optical system is f, the combined focal length of the fifth lens and the sixth lens is f56, the combined focal length of the sixth lens and the seventh lens is f67, 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 thickness of the seventh lens on the optical axis is CT7, which satisfies the following conditions: -1.25 < R12 / R14; -1.50 < f / f56 < 0.68; -0.30 < f / f67 < 1.70; -0.85 < (R10+R11) / (R10-R11) < 1.25; (R9+R13) / (R9-R13) < 3.00; 1.05 < T23 / T34 < 3.70; and 5.40 < f / CT7 < 9.

50.

18. The optical system lens assembly as described in claim 17, characterized in that, The optical axis spacing between the first lens and the second lens is T12, the optical axis spacing between the second lens and the third lens is T23, the optical axis spacing between the third lens and the fourth lens is T34, the optical axis spacing between the fourth lens and the fifth lens is T45, the optical axis spacing between the fifth lens and the sixth lens is T56, and the optical axis spacing between the sixth lens and the seventh lens is T67, satisfying the following conditions: 0.55 < (T12+T23) / (T34+T45+T56+T67) < 1.

50.

19. The optical system lens assembly as described in claim 17, characterized in that, It also includes an aperture, wherein the distance between the aperture and an imaging plane on the optical axis is SL, and the focal length of the lens group of the optical system is f, which satisfies the following condition: 1.60 < SL / f < 2.

70.

20. The optical system lens assembly as described in claim 17, characterized in that, The optical axis spacing between the first lens and the second lens is T12, the optical axis spacing between the second lens and the third lens is T23, and the sum of the optical axis spacing between all adjacent lenses in the optical system lens group is ΣAT, which satisfies the following condition: 0.30 < (T12+T23) / ΣAT < 0.

70.

21. The optical system lens assembly as described in claim 17, characterized in that, The object-side surface of the fifth lens is concave near the optical axis, and the image-side surface of the fifth lens is convex near the optical axis. Half of the maximum field of view in the lens group of the optical system is the HFOV, which satisfies the following conditions: 59.0 degrees < HFOV < 73.0 degrees.

22. The optical system lens assembly as described in claim 17, characterized in that, The second lens has a refractive index of N2, and the fourth lens has a refractive index of N4, satisfying the following condition: 1.60 < (N2+N4) / 2 < 1.

72.

23. The optical system lens assembly as described in claim 17, characterized in that, The Abbe number of the first lens is V1, the Abbe number of the second lens is V2, the Abbe number of the third lens is V3, the Abbe number of the fourth lens is V4, the Abbe number of the fifth lens is V5, the Abbe number of the sixth lens is V6, the Abbe number of the seventh lens is V7, and the Abbe number of the i-th lens is Vi. The refractive index of the first lens is N1, the refractive index of the second lens is N2, the refractive index of the third lens is N3, the refractive index of the fourth lens is N4, the refractive index of the fifth lens is N5, the refractive index of the sixth lens is N6, the refractive index of the seventh lens is N7, and the refractive index of the i-th lens is Ni. At least one lens in the optical system group satisfies the following condition: 5.0 < Vi / Ni < 11.9, where i = 1, 2, 3, 4, 5, 6 or 7.

24. An optical system lens assembly, characterized in that, It comprises seven lenses, which are arranged sequentially from the object side to the image side along the light path as a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens, and each of the seven 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 object-side surface is concave near the optical axis. The second lens has a convex object-side surface near the optical axis. The third lens has positive refractive power. The fifth lens has positive refractive power. The sixth lens has a convex object-side surface near the optical axis and a concave image-side surface near the optical axis. The seventh lens has a convex object-side surface near the optical axis and a concave image-side surface near the optical axis, and its image-side surface has at least one inflection point. Wherein, the radius of curvature of the object-side surface of the first lens is R1, the radius of curvature of the image-side surface of the first lens is R2, the radius of curvature of the object-side surface of the second lens is R3, the focal length of the optical system lens group is f, the focal length of the first lens is f1, the focal length of the seventh lens is f7, the thickness of the fifth lens on the optical axis is CT5, the thickness of the seventh lens on the optical axis is CT7, the distance between the fourth lens and the fifth lens on the optical axis is T45, the distance from the object-side surface of the first lens to an imaging plane on the optical axis is TL, and the maximum imaging height of the optical system lens group is ImgH, which satisfies the following conditions: (R1+R2) / (R1-R2) < 0; -0.50 < f / f7 < 0.60; 0.50 < CT5 / T45 < 7.50; -3.00 < f / f1 < -0.10; 0.50 < f / R3 < 1.90; TL / ImgH < 2.00; and 5.40 < f / CT7 < 9.

50.

25. The optical system lens assembly as described in claim 24, characterized in that, The first lens has at least one inflection point on its object-side surface. The maximum thickness of a single lens along the optical axis in the optical system lens group is CT_MAX. The focal length of the optical system lens group is f, and it satisfies the following conditions: 0.30 < CT_MAX / f < 0.

50.

26. The optical system lens assembly as described in claim 24, characterized in that, The focal length of the lens group in the optical system is f, and the combined focal length of the first lens and the second lens is f12, which satisfies the following conditions: -0.49 < f / f12 < -0.

10.

27. The optical system lens assembly as described in claim 24, characterized in that, The radius of curvature of the image-side surface of the fifth lens is R10, and the radius of curvature of the object-side surface of the sixth lens is R11, satisfying the following conditions: -0.85 < (R10+R11) / (R10-R11) < 1.

25.

28. The optical system lens assembly as described in claim 24, characterized in that, The fourth lens has a refractive index of N4, and the sixth lens has a refractive index of N6, satisfying the following conditions: 1.60 < (N4+N6) / 2 < 1.

85.

29. The optical system lens assembly as described in claim 24, characterized in that, The Abbe number of the first lens is V1, the Abbe number of the second lens is V2, the Abbe number of the third lens is V3, the Abbe number of the fourth lens is V4, the Abbe number of the fifth lens is V5, the Abbe number of the sixth lens is V6, the Abbe number of the seventh lens is V7, and the Abbe number of the i-th lens is Vi. The refractive index of the first lens is N1, the refractive index of the second lens is N2, the refractive index of the third lens is N3, the refractive index of the fourth lens is N4, the refractive index of the fifth lens is N5, the refractive index of the sixth lens is N6, the refractive index of the seventh lens is N7, and the refractive index of the i-th lens is Ni. At least one lens in the optical system group satisfies the following condition: 5.0 < Vi / Ni < 11.9, where i = 1, 2, 3, 4, 5, 6 or 7.

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