Imaging optical system and image capturing device

Abstract

The invention discloses a shooting optical system group, which sequentially comprises a first lens group, an aperture and a second lens group. The total number of the lenses in the first lens group is one to three, and the first lens group comprises the first lens closest to the object side. The total number of the lenses in the second lens group is five to eight, and the second lens group comprises the last lens closest to the image side. The imaging optical system group further includes a second lens, a third lens, a fourth lens, and a fifth lens between the first lens and the last lens. The first lens group has positive refractive power, and the second lens group has negative refractive power. The second lens element has an object-side surface being convex in a paraxial region thereof. The object-side surface of the third lens element is convex in a paraxial region, and the image-side surface of the third lens element is concave in a paraxial region. When specific conditions are satisfied, the shooting optical system group can simultaneously satisfy requirements of telescoping, miniaturization and high imaging quality. The invention further discloses an image capturing device with the shooting optical system group.

Description

Technical Field

[0001] This disclosure relates to a camera optical system assembly and an image capturing device, particularly a camera optical system assembly suitable for an image capturing device. Background Technology

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

[0003] As technology advances rapidly, electronic devices equipped with optical lenses are being used in a wider range of applications, leading to more diverse requirements for these lenses. Since existing optical lenses often struggle to achieve a balance between image quality, sensitivity, aperture size, size, and angle of view, this invention provides an optical lens with an ultra-long focal length, internal focusing capability, and high image quality to meet these needs. Summary of the Invention

[0004] This disclosure provides a camera optical system assembly and an image capturing device. The camera optical system assembly includes, sequentially from the object side to the image side along the optical path, a first lens group, an aperture, and a second lens group. Under certain conditions, the camera optical system assembly provided by this disclosure can simultaneously meet the requirements of telephoto range, miniaturization, and high image quality.

[0005] The present disclosure provides an imaging optical system group, which sequentially includes a first lens group, an aperture, and a second lens group along the optical path from the object side to the image side. All lenses of the imaging optical system group respectively have an object side surface facing the object side direction and an image side surface facing the image side direction. Preferably, the total number of lenses in the first lens group is one to three. Preferably, the total number of lenses in the second lens group is five to eight. Preferably, there are no other interpolated lenses between the first lens group and the second lens group. Preferably, the first lens group includes the first lens closest to the object side. Preferably, the second lens group includes the last lens closest to the image side. Preferably, the imaging optical system group further sequentially includes a second lens, a third lens, a fourth lens, and a fifth lens between the first lens and the last lens along the optical path, and there are no other interpolated lenses between the first lens and the fifth lens. Preferably, the first lens group has a positive refractive power. Preferably, the second lens group has a negative refractive power. Preferably, the object side surface of the first lens is convex near the optical axis. Preferably, the object side surface of the second lens is convex near the optical axis. Preferably, the object side surface of the third lens is convex near the optical axis. Preferably, the image side surface of the third lens is concave near the optical axis. Preferably, at least one of the fifth lens and the sixth lens counted from the object side in the imaging optical system group is a negative lens. The total focal length of the imaging optical system group corresponding to an infinite object distance is fL, the focal length of the i-th lens counted from the object side in the imaging optical system group is fi, the minimum value of fL / fi is MIN(fL / fi), the radius of curvature of the object side surface of the third lens is R5, the radius of curvature of the image side surface of the third lens is R6, the maximum value of the interval distance on the optical axis between all adjacent lenses of the imaging optical system group corresponding to an infinite object distance is ATLmax, and the maximum imaging height of the imaging optical system group is ImgH, and it preferably satisfies the following conditions:

[0006] -13.80 < MIN(fL / fi) < -3.80, where i is a positive integer and 1 ≤ i ≤ the total number of lenses in the imaging optical system group;

[0007] 0 < (R5 + R6) / fL < 3.50; and

[0008] 1.00 < ATLmax / ImgH < 6.00.

[0009] The present disclosure further provides an imaging optical system group, which sequentially includes a first lens group, an aperture, and a second lens group along the optical path from the object side to the image side. All lenses of the imaging optical system group respectively have an object side surface facing the object side direction and an image side surface facing the image side direction. Preferably, the total number of lenses in the first lens group is one to three. Preferably, the total number of lenses in the second lens group is five to eight. Preferably, there are no other interpolated lenses between the first lens group and the second lens group. Preferably, the first lens group includes a first lens closest to the object side. Preferably, the second lens group includes a last lens closest to the image side. Preferably, the imaging optical system group further sequentially includes a second lens, a third lens, a fourth lens, and a fifth lens between the first lens and the last lens along the optical path, and there are no other interpolated lenses between the first lens and the fifth lens. Preferably, the first lens group has a positive refractive power. Preferably, the second lens group has a negative refractive power. Preferably, the object side surface of the first lens is convex near the optical axis. Preferably, the object side surface of the second lens is convex near the optical axis. Preferably, the object side surface of the third lens is convex near the optical axis. Preferably, the image side surface of the third lens is concave near the optical axis. Preferably, the object side surface of the fourth lens is convex near the optical axis. The total focal length of the imaging optical system group corresponding to an infinite object distance is fL, the focal length of the i-th lens counted from the object side in the imaging optical system group is fi, the minimum value of fL / fi is MIN(fL / fi), the focal length of the first lens group is fA1, the maximum value of the thickness of a singlet lens on the optical axis among all lenses of the imaging optical system group is CTmax, and the maximum value of the spacing distance on the optical axis between all adjacent lenses of the imaging optical system group corresponding to an infinite object distance is ATLmax, and it preferably satisfies the following conditions:

[0010] -15.00 < MIN(fL / fi) < -2.80, where i is a positive integer and 1 ≤ i ≤ the total number of lenses in the imaging optical system group;

[0011] 1.20 < fL / fA1 < 3.00; and

[0012] 0.20 < CTmax / ATLmax < 1.50.

[0013] The present disclosure further provides an imaging optical system group, including multiple lenses. Preferably, the total number of these lenses is eight to nine. Preferably, these lenses sequentially include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens along the optical path from the object side to the image side, and these lenses respectively have an object-side surface facing the object side direction and an image-side surface facing the image side direction. Preferably, the first lens is the lens closest to the object side among all the lenses of the imaging optical system group. Preferably, there are no other interpolated lenses between the first lens and the eighth lens. Preferably, the first lens has a positive refractive power. Preferably, the object-side surface of the second lens is convex near the optical axis. Preferably, the object-side surface of the third lens is convex near the optical axis. Preferably, the image-side surface of the third lens is concave near the optical axis. Preferably, the object-side surface of the fourth lens is convex near the optical axis. Preferably, the imaging optical system group further includes an aperture, and the aperture is located between the first lens and the fourth lens. The total focal length of the imaging optical system group corresponding to an infinite object distance is fL, the focal length of the i-th lens counted from the object side in the imaging optical system group is fi, the minimum value of fL / fi is MIN(fL / fi), the focal length of the second lens is f2, the radius of curvature of the object-side surface of the third lens is R5, the radius of curvature of the object-side surface of the first lens counted from the image side in the imaging optical system group is Rlast2, and half of the maximum viewing angle of the imaging optical system group corresponding to an infinite object distance is HFOVL, which preferably satisfies the following conditions:

[0014] -13.80 < MIN(fL / fi) < -3.80, where i is a positive integer and 1 ≤ i ≤ the total number of lenses of the imaging optical system group;

[0015] -1.00 < R5 / Rlast2 < 4.50;

[0016] -1.50 < fL / f2 < 4.50; and

[0017] 1.0 degree < HFOVL < 7.5 degrees.

[0018] The present disclosure provides an image pickup device, which includes the aforementioned imaging optical system group and an electronic photosensitive element, where the electronic photosensitive element is disposed on the imaging surface of the imaging optical system group.

[0019] The imaging optical system group and the image pickup device provided by the present disclosure can, in response to the thickness limitation of the electronic device, cut some lens barrels or lenses to reduce the uniaxial length, which is beneficial to reducing the lens volume and further achieving miniaturization of the module. In addition, a reflecting element can be used to provide different optical path directions for the overall system, giving the lens more flexible use space to demonstrate the telephoto effect of long focal length.

[0020] When MIN(fL / fi) meets the above conditions, the refractive power configuration can be adjusted, which helps to reduce sensitivity and form a super telephoto configuration.

[0021] When (R5+R6) / fL meets the above conditions, limiting the curvature of the third lens surface can help guide light, allowing the camera optical system to achieve a balance between aperture size, overall length, and telephoto structure.

[0022] When ATLmax / ImgH meets the above conditions, it can avoid the difficulty of assembly caused by excessive lens spacing and help improve the telescopic function of the camera optical system assembly.

[0023] When fL / fA1 meets the above conditions, the refractive force of the camera optical system assembly at the front end can be adjusted, which helps to compress the volume and reduce aberrations such as spherical aberration, thereby improving the imaging quality.

[0024] When CTmax / ATLmax meets the above conditions, it helps to balance the spatial configuration and control the overall length of the camera optical system group while maintaining a long focal length.

[0025] When R5 / Rlast2 meets the above conditions, it can help balance the optical path direction during the focusing process, improve image curvature, and reduce stray light generation.

[0026] When fL / f2 meets the above conditions, it helps to control whether the light converges or diverges in the second lens, which is beneficial for aberration correction and improves the light-gathering quality of the entire field of view.

[0027] When HFOVL meets the above conditions, it can enable the camera optical system assembly to have telescopic characteristics and help maintain its size.

[0028] The foregoing description of the contents of this disclosure and the following description of the embodiments are used to demonstrate and explain the spirit and principles of this disclosure, and to provide a further explanation of the claims of this disclosure. Attached Figure Description

[0029] Figure 1 The diagram illustrates the imaging device according to the first embodiment of this disclosure in a first shooting state and a second shooting state.

[0030] Figure 2 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device in the first embodiment during the first shooting state.

[0031] Figure 3 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the first embodiment in the second shooting state.

[0032] Figure 4The diagram illustrates the imaging device according to the second embodiment of this disclosure in a first shooting state and a second shooting state.

[0033] Figure 5 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the second embodiment in the first shooting state.

[0034] Figure 6 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the second embodiment in the second shooting state.

[0035] Figure 7 The diagram illustrates the imaging device according to the third embodiment of this disclosure in a first shooting state and a second shooting state.

[0036] Figure 8 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the third embodiment in the first shooting state.

[0037] Figure 9 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device in the second shooting state according to the third embodiment.

[0038] Figure 10 The diagram illustrates the imaging device according to the fourth embodiment of this disclosure in a first shooting state and a second shooting state.

[0039] Figure 11 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the fourth embodiment in the first shooting state.

[0040] Figure 12 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device in the second shooting state according to the fourth embodiment.

[0041] Figure 13 The diagram illustrates the imaging device according to the fifth embodiment of this disclosure in a first shooting state and a second shooting state.

[0042] Figure 14 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the fifth embodiment in the first shooting state.

[0043] Figure 15 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device in the second shooting state according to the fifth embodiment.

[0044] Figure 16 The diagram illustrates the imaging device according to the sixth embodiment of this disclosure in a first shooting state and a second shooting state.

[0045] Figure 17 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device in the sixth embodiment during the first shooting state.

[0046] Figure 18 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device in the second shooting state according to the sixth embodiment.

[0047] Figure 19 The diagram illustrates the imaging device according to the seventh embodiment of this disclosure in a first shooting state and a second shooting state.

[0048] Figure 20 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the seventh embodiment in the first shooting state.

[0049] Figure 21 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device in the second shooting state according to the seventh embodiment.

[0050] Figure 22 The diagram illustrates the imaging device according to the eighth embodiment of this disclosure in a first shooting state and a second shooting state.

[0051] Figure 23 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device in the first shooting state according to the eighth embodiment.

[0052] Figure 24 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device in the second shooting state according to the eighth embodiment.

[0053] Figure 25 Schematic diagrams illustrating the imaging device according to the ninth embodiment of this disclosure in a first shooting state and a second shooting state.

[0054] Figure 26 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the ninth embodiment in the first shooting state.

[0055] Figure 27 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device in the second shooting state according to the ninth embodiment.

[0056] Figure 28 The diagram illustrates the imaging device according to the tenth embodiment of this disclosure in a first shooting state and a second shooting state.

[0057] Figure 29From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the tenth embodiment in the first shooting state.

[0058] Figure 30 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the tenth embodiment in the second shooting state.

[0059] Figure 31 The diagram illustrates the imaging device according to the eleventh embodiment of this disclosure in a first shooting state and a second shooting state.

[0060] Figure 32 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device in the eleventh embodiment during the first shooting state.

[0061] Figure 33 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device in the eleventh embodiment during the second shooting state.

[0062] Figure 34 A perspective view of an imaging device according to the twelfth embodiment of this disclosure is shown.

[0063] Figure 35 A perspective view of one side of an electronic device according to the thirteenth embodiment of this disclosure is shown.

[0064] Figure 36 Draw Figure 35 A three-dimensional diagram of the other side of the electronic device.

[0065] Figure 37 A perspective view of one side of an electronic device according to the fourteenth embodiment of this disclosure is shown.

[0066] Figure 38 Draw Figure 37 A three-dimensional diagram of the other side of the electronic device.

[0067] Figure 39 Draw Figure 37 System block diagram of an electronic device.

[0068] Figure 40 A perspective view of one side of an electronic device according to the fifteenth embodiment of this disclosure is shown.

[0069] Figure 41 A schematic diagram of an electronic device according to the sixteenth embodiment of this disclosure is shown.

[0070] Figure 42A schematic diagram illustrating the parameters YL1R1, YLA1Rlast, YLA2R1, YL8R2, YLmin, ETL12, ETLA12, ETL3 and ETLlast in the first shooting state according to the first embodiment of this disclosure.

[0071] Figure 43 A schematic diagram illustrating the parameter CRAL in the first shooting state according to the first embodiment of this disclosure.

[0072] Figure 44 A schematic diagram illustrating one configuration of the reflective elements in a camera optical system assembly according to the present disclosure is shown.

[0073] Figure 45 A schematic diagram illustrating another configuration of the reflective element in a camera optical system assembly according to this disclosure is shown.

[0074] Figure 46 A schematic diagram illustrating another configuration of the reflective element in a camera optical system assembly according to the present disclosure is shown.

[0075] Figure 47 A schematic diagram illustrating one configuration of two reflective elements in a camera optical system assembly according to the present disclosure is shown.

[0076] Figure 48 A schematic diagram illustrating another configuration of the two reflective elements in a camera optical system assembly according to the present disclosure is shown.

[0077] [Symbol Explanation]

[0078] 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 100, 100a, 100b, 100c, 100d, 100e, 100f, 100g, 100h, 100i, 100j, 100k, 100m, 100n, 100p, 100q, 100r, 501: imaging device

[0079] 101: Imaging Lens

[0080] 102: Drive unit

[0081] 103: Electronic photosensitive element

[0082] 104: Image Stabilization Module

[0083] 200, 300, 400, 500: Electronic devices

[0084] 201, 304: Display module

[0085] 301, 401: Flash module

[0086] 302: Focusing Assist Module

[0087] 303: Image Signal Processor

[0088] 305: Image Software Processor

[0089] 306: Subject

[0090] LG: Lens Group

[0091] FT: Filter element

[0092] LF, LF1, LF2: Reflective elements

[0093] LP1, LP2: Penetration surface

[0094] RF1, RF2: Reflecting surfaces

[0095] OA: Optical Axis

[0096] OA1: First optical axis

[0097] OA2: Second optical axis

[0098] OA3: Third optical axis

[0099] ST: Aperture

[0100] S1: Aperture

[0101] E1: First lens

[0102] E2: Second lens

[0103] E3: Third Lens

[0104] E4: Fourth Lens

[0105] E5: Fifth Lens

[0106] E6: Sixth Lens

[0107] E7: Seventh Lens

[0108] E8: Eighth Lens

[0109] E9: Ninth Lens

[0110] E10: Filter element

[0111] IMG: Imaging Surface

[0112] IS: Electronic photosensitive element

[0113] A1: First lens group

[0114] A2: Second lens group

[0115] CRAL: The angle of incidence of the principal ray at the maximum imaging height position for the camera optical system at infinity object distance.

[0116] CRL: Chief Ray

[0117] ETL12: The distance parallel to the optical axis between the maximum effective radius positions of the image-side surfaces of the first lens and the second lens at infinity object distance in a camera optical system assembly. ETL3: The distance parallel to the optical axis between the maximum effective radius positions of the object-side surfaces of the third lens and the third lens at infinity object distance in a camera optical system assembly. ETLA12: The distance parallel to the optical axis between the maximum effective radius positions of the lens surfaces closest to the image side of the first lens group and the second lens group's closest object side lens surface at infinity object distance in a camera optical system assembly.

[0118] ETLlast: The distance parallel to the optical axis between the maximum effective radius of the object-side surface of the last lens and the maximum effective radius of the image-side surface of the last lens when the camera optical system is at an infinity object distance.

[0119] YL1R1: Maximum effective radius of the object-side surface of the first lens in the camera optical system assembly at an infinity object distance.

[0120] YL8R2: Maximum effective radius of the image-side surface of the eighth lens in the camera optical system assembly at infinity object distance.

[0121] YLA1Rlast: The maximum effective radius of the lens surface closest to the image side of the first lens group in the camera optical system assembly at an infinity object distance.

[0122] YLA2R1: The maximum effective radius of the lens surface closest to the object side in the second lens group of the camera optical system at infinity object distance.

[0123] YLmin: The minimum effective radius of the camera optical system assembly when it is in the first shooting state. Detailed Implementation

[0124] This disclosure presents a configuration in which the camera optical system assembly sequentially includes a first lens group, an aperture, and a second lens group along the optical path from the object side to the image side. This allows for precise aperture positioning to ensure sufficient light intake for the camera optical system assembly, thereby improving image illumination.

[0125] The first lens group can have one to three lenses, and the second lens group can have five to eight lenses. This provides sufficient lens variation to improve image quality and avoids problems of excessive length and weight. Specifically, the first lens group can have two lenses. The second lens group can have at least six lenses. The camera optical system group can have at least seven lenses. The camera optical system group can have eight lenses. The camera optical system group can have nine lenses.

[0126] The first lens group may include the first lens closest to the object side, and the second lens group may include the last lens closest to the image side, with no other interposed lenses between the first and second lens groups. This simplifies the complexity of the mechanism.

[0127] The camera optical system assembly may include a second lens, a third lens, a fourth lens, and a fifth lens in sequence between the first lens and the last lens along the optical path, and there are no other interposed lenses between the first lens and the fifth lens.

[0128] In the camera optical system group, the i-th lens is the i-th lens from the object side, the last lens is the N-th lens from the object side, and the N+1-i-th lens is the i-th lens from the image side, where N is the total number of lenses in the camera optical system group, and i is a positive integer in the range of 1 to N (the total number of lenses in the camera optical system group).

[0129] For example, when the total number of lenses in the camera optical system is eight, the sixth lens from the object side is the sixth lens, the seventh lens from the object side is the seventh lens, and the eighth lens from the object side is the eighth lens or the last lens. Furthermore, from the image side, the first to the eighth lenses correspond to the eighth lens to the first lens (lens 8+1-1 to 8+1-8, N=8). When the total number of lenses in the camera optical system is nine, the sixth lens from the object side is the sixth lens, the seventh lens from the object side is the seventh lens, the eighth lens from the object side is the eighth lens, and the ninth lens from the object side is the ninth lens or the last lens. Furthermore, from the image side, the first to the ninth lenses correspond to the ninth lens to the first lens (lens 9+1-1 to 9+1-9, N=9).

[0130] In another configuration disclosed herein, the camera optical system assembly may comprise multiple lenses. The total number of these lenses may be eight.

[0131] In the camera optical system assembly, these lenses, arranged sequentially from the object side to the image side along the optical path, include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens. The first lens is the first lens counted from the object side; the second lens is the second lens counted from the object side; the third lens is the third lens counted from the object side; the fourth lens is the fourth lens counted from the object side; the fifth lens is the fifth lens counted from the object side; the sixth lens is the sixth lens counted from the object side; the seventh lens is the seventh lens counted from the object side; and the eighth lens is the eighth lens counted from the object side, and the eighth lens can also be referred to as the last lens. From the image side, the first to the eighth lenses correspond to the eighth to the first lenses, respectively.

[0132] The camera optical system assembly may also include an aperture, which can be located between the first lens and the fourth lens. This allows for precise aperture positioning, ensuring sufficient light intake for the camera optical system assembly and improving image illumination.

[0133] In another configuration disclosed herein, the camera optical system assembly may comprise multiple lenses. The total number of these lenses may be nine.

[0134] In the camera optical system assembly, these lenses, arranged sequentially from the object side to the image side along the optical path, include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, and a ninth lens. The first lens is the first lens counted from the object side; the second lens is the second lens counted from the object side; the third lens is the third lens counted from the object side; the fourth lens is the fourth lens counted from the object side; the fifth lens is the fifth lens counted from the object side; the sixth lens is the sixth lens counted from the object side; the seventh lens is the seventh lens counted from the object side; the eighth lens is the eighth lens counted from the object side; and the ninth lens is the ninth lens counted from the object side, and the ninth lens can also be referred to as the last lens. From the image side, the first to ninth lenses correspond to the ninth to the first lenses, respectively.

[0135] The camera optical system assembly may also include an aperture, which can be located between the first lens and the fourth lens. This allows for precise aperture positioning, ensuring sufficient light intake for the camera optical system assembly and improving image illumination.

[0136] In this disclosure, all lenses in the camera optical system group have an object-side surface facing the object side and an image-side surface facing the image side. The first lens is also referred to as the lens closest to the object side among all lenses in the camera optical system group, and the last lens is also referred to as the lens closest to the image side among all lenses in the camera optical system group.

[0137] The first lens group can have positive refractive power. This allows the refractive power configuration of the lens to be adjusted in conjunction with the aperture position, which helps to reduce the overall length of the camera optical system assembly at the front end.

[0138] The second lens group can have negative refractive power. This allows for adjustment of the focal length of the camera optical system at the rear end in conjunction with the aperture configuration, which helps in the formation of the telescope structure.

[0139] The first lens may have positive refractive power. This helps to reduce volume and control the shooting angle. The object-side surface of the first lens may be convex near the optical axis. This helps to adjust the incident light to enter the camera optical system assembly at an appropriate angle to meet application specifications.

[0140] The second lens can have positive refractive power. This, in conjunction with the refractive power of the first lens, helps improve the light-gathering ability of the camera optical system at the front end and reduces aberrations. The object-side surface of the second lens can be convex near the optical axis. This, in conjunction with the first lens, corrects aberrations such as spherical aberration and helps to increase the aperture and improve image quality.

[0141] The object-side surface of the third lens can be convex near the optical axis. This allows the object-side surface of the third lens to converge light rays, thus achieving miniaturization. The image-side surface of the third lens can be concave near the optical axis. This allows adjustment of the light exit direction at the third lens, helping to balance the light path and correct spherical aberration in the camera optical system.

[0142] The fourth lens can have positive refractive power. This helps to balance aberrations such as spherical aberration and chromatic aberration at the front and rear ends of the camera optical system. The object-side surface of the fourth lens can be convex near the optical axis. This allows adjustment of the refractive power of the fourth lens, which helps to converge light rays.

[0143] The fifth lens can have negative refractive power. This helps balance the overall refractive power configuration of the camera optics system, which is beneficial for extending the focal length. The image-side surface of the fifth lens can be concave near the optical axis. This helps to harmonize the optical path and helps the camera optics system achieve a balance between image quality and overall length.

[0144] In the camera optical system assembly, at least one of the fifth lens (fifth lens) and the sixth lens (sixth lens) counted from the object side can be a negative lens.

[0145] When the total number of lenses in a camera optical system is seven or more, the seventh lens (the seventh lens) counting from the object side can have negative refractive power. This helps to maintain an appropriate back focal length while correcting field curvature.

[0146] When the total number of lenses in a camera optical system is eight or more, the eighth lens (the eighth lens) counting from the object side can have positive refractive power. This helps in adjusting the back focal length, improves the light-gathering quality of each field of view at the imaging plane, and reduces aberrations.

[0147] Please note that in this disclosure, the focal length of the lens or the focal length of the lens group are calculated assuming that the medium in front of and behind the lens or lens group is air. Furthermore, in addition to visible light, the camera optical system assembly can also use infrared light, but this disclosure is not limited to this.

[0148] The camera optics system assembly may include at least two glass lenses and at least one plastic lens. This allows for a balance between production capability, temperature effects, size, weight, and cost, expanding the product's application range. The camera optics system assembly may also include at least two glass lenses and at least two plastic lenses.

[0149] The camera optics system may include at least one spherical lens and at least one aspherical lens. By using a spherical lens with glass, image distortion caused by temperature effects can be avoided, while by using an aspherical lens with plastic, aberration correction, weight reduction, and increased productivity can be achieved.

[0150] The camera optical system assembly can perform a focusing process by moving at least one of its lenses. This enables the camera optical system assembly to perform both telephoto and close-up shooting, effectively enhancing its usability. Specifically, the camera optical system assembly can perform a focusing process by moving at least one lens in the second lens group.

[0151] The camera optical system assembly can have at least two shooting states through the focusing process. These at least two shooting states may include a first shooting state corresponding to an infinity object distance and a second shooting state corresponding to a finite object distance. The first shooting state is the state of the camera optical system assembly when the subject is at infinity (infinity object distance), while the second shooting state is the state of the camera optical system assembly when the subject is at a finite object distance. Please refer to... Figure 1 This is a schematic diagram illustrating the camera optical system assembly in the imaging device according to the first embodiment of the present disclosure in a first shooting state and a second shooting state, wherein... Figure 1 The upper part is a schematic diagram of the camera optical system assembly in the first shooting state, while Figure 1 The lower half is a schematic diagram of the camera optical system assembly in the second shooting state.

[0152] In this disclosure, the finite object distance can be defined as the subject being significantly close to the camera optical system assembly relative to infinity. Specifically, the infinity object distance can refer to a distance on the optical axis between the object-side surfaces of the subject and the lens (e.g., the first lens) closest to the object side in the camera optical system assembly, which is greater than 1000 meters. The finite object distance can also refer to a distance on the optical axis between the object-side surfaces of the subject and the lens (e.g., the first lens) closest to the object side in the camera optical system assembly, which is less than 50 meters. Furthermore, the finite object distance can also refer to a distance on the optical axis between the object-side surfaces of the subject and the lens (e.g., the first lens) closest to the object side in the camera optical system assembly, which is less than 15 meters (15000 mm).

[0153] When the subject moves from an infinity distance to a finite distance, the camera optical system can perform a focusing process to switch from the first shooting state to the second shooting state. Conversely, when the subject moves from a finite distance to an infinity distance, the camera optical system can also perform a focusing process to switch from the second shooting state to the first shooting state.

[0154] Please note that the first lens group and the second lens group disclosed herein are distinguished only by aperture, and the lenses within each of the first lens group and the second lens group do not necessarily have a linkage relationship during the focusing process.

[0155] For an infinity object distance, the lens with the smallest effective radius among all lenses in the camera optical system assembly can be either the second lens from the image side or the third lens from the image side. This helps to reduce the size of the camera optical system assembly and facilitates the formation of a super telescope structure with internal focusing capability. Specifically, the lens with the smallest effective radius among all lenses in the camera optical system assembly for an infinity object distance can be the second lens from the image side. Please refer to... Figure 42 This is a schematic diagram illustrating the minimum effective radius YLmin of the camera optical system assembly in the first shooting state according to the first embodiment of this disclosure.

[0156] The maximum distance between all adjacent lenses in the camera optical system group on the optical axis can be located in the second lens group. This ensures sufficient space for lens movement during shooting at multiple object distances and helps improve manufacturability.

[0157] In the second lens group, at least two adjacent lenses can be bonded together. This helps to reduce size, avoid problems such as total internal reflection and ghosting, and improve image quality.

[0158] The second lens group, arranged along the optical path from the object side to the image side, sequentially includes a convex-concave lens, an achromatic lens group with negative refractive power, and an aspherical lens. This allows the lenses to work together to reduce astigmatism, chromatic aberration, and image curvature across different fields of view, improving light-gathering quality across the entire field of view. The achromatic lens group, arranged along the optical path from the object side to the image side, can be composed of a pair of convex positive lenses and a pair of concave negative lenses. The achromatic lens group located in the second lens group helps correct chromatic aberration at multiple object distances, effectively improving image quality.

[0159] The imaging optical system assembly disclosed herein may include at least one reflective element, such as a prism or reflective mirror, in the optical path between the object and the imaging surface, which has a light path deflection function. The reflective element may have at least one reflective surface, and the light path passing through the at least one reflective surface of the reflective element may be reflected at least once. This is beneficial for compressing the overall volume and allows the imaging optical system assembly to have different light path orientations, providing a more flexible spatial configuration for the imaging optical system assembly. This makes the thinness and lightness of electronic devices not limited by the total optical length of the imaging optical system assembly, helps to reduce structural limitations and lens miniaturization, and thus achieves more stringent specification requirements.

[0160] The angle between the normal direction of the reflecting surface and the optical axis is not limited to 45 degrees and can be other angles depending on spatial configuration and other requirements. The reflecting element can deflect the light path from the optical axis near the object side to the optical axis near the image side. The angle between the optical axis vector near the object side and the optical axis vector near the image side can be any angle, not limited to 0, 90, or 180 degrees. In addition, for reasons such as reducing the occupied volume, the length and width of the mirror can be unequal, and the length, width, and height of the prism can also be unequal. The surface shape of the reflecting element (e.g., the surface shape of the prism surface or the mirror surface) can be planar, spherical, aspherical, or freeform, etc., depending on the requirements of optical design, but this disclosure is not limited to these. The reflecting element can be composed of more than one prism depending on the design requirements. The prism can be made of materials such as glass or plastic depending on the design requirements. In addition, prisms with light path deflection function are not counted in the lenses mentioned above, that is, the lenses of the camera optical system assembly do not include prisms with light path deflection function.

[0161] For further explanation, please refer to Figures 44 to 46 Each diagram illustrates a configuration of a reflective element in a camera optical system assembly according to this disclosure. Figures 44 to 46 As shown, the camera optical system assembly, along the optical path direction from the subject (not shown) to the imaging surface IMG, sequentially includes a reflective element LF, a lens group LG, a filter element FT, and the imaging surface IMG. The lens group LG corresponds to the two lens groups disclosed in this disclosure.

[0162] exist Figure 44 In this structure, the reflecting element LF is a prism, which sequentially has a first transmitting surface LP1, a reflecting surface RF1, and a second transmitting surface LP2 along the optical path. The optical path travels along the first optical axis OA1, passes through the first transmitting surface LP1, and reaches the reflecting surface RF1. The reflecting surface RF1 redirects the optical path from the first optical axis OA1 to the second optical axis OA2. The optical path then travels along the second optical axis OA2, passes through the second transmitting surface LP2, and then through the lens group LG and the filter element FT, finally reaching the imaging surface IMG. Figure 44 As shown, the first penetrating surface LP1 and the second penetrating surface LP2 of the reflective element LF can both be planar.

[0163] exist Figure 45 In the image, the reflecting element LF is a plane mirror with a reflecting surface RF1. The light path travels along the first optical axis OA1 to the reflecting surface RF1, where the reflecting surface RF1 turns the light path from the first optical axis OA1 to the second optical axis OA2. The light path then travels along the second optical axis OA2 through the lens group LG and the filter element FT, and finally reaches the imaging surface IMG.

[0164] exist Figure 46 In this structure, the reflecting element LF is a prism, which sequentially has a first transmitting surface LP1, a reflecting surface RF1, and a second transmitting surface LP2 along the optical path. The optical path travels along the first optical axis OA1, passes through the first transmitting surface LP1, and reaches the reflecting surface RF1. The reflecting surface RF1 redirects the optical path from the first optical axis OA1 to the second optical axis OA2. The optical path then travels along the second optical axis OA2, passes through the second transmitting surface LP2, and then through the lens group LG and the filter element FT, finally reaching the imaging surface IMG. Figure 46 As shown, the first penetrating surface LP1 and the second penetrating surface LP2 of the reflective element LF can both be curved surfaces.

[0165] In addition, please refer to Figure 47 and Figure 48 The diagrams illustrate a configuration of two reflective elements according to this disclosure within a camera optical system assembly. For example... Figure 47 and Figure 48 As shown, the camera optical system assembly, traveling along the optical path from the subject (not shown) to the imaging surface IMG, sequentially includes a first reflecting element LF1, a lens group LG, a filter element FT, a second reflecting element LF2, and the imaging surface IMG. The optical path travels along the first optical axis OA1 to the first reflecting surface RF1 of the first reflecting element LF1, and the first reflecting surface RF1 deflects the optical path from the first optical axis OA1 to the second optical axis OA2. The optical path travels along the second optical axis OA2 through the lens group LG and the filter element FT. Next, the optical path travels along the second optical axis OA2 to the second reflecting surface RF2 of the second reflecting element LF2, and the second reflecting surface RF2 deflects the optical path from the second optical axis OA2 to the third optical axis OA3. The optical path travels along the third optical axis OA3 to the imaging surface IMG. Figure 47Among them, the first reflecting element LF1 and the second reflecting element LF2 can both be prisms. In Figure 48 Among them, the first reflecting element LF1 and the second reflecting element LF2 can be a prism and a plane mirror respectively.

[0166] The total focal length of the imaging optical system group corresponding to an infinite object distance is fL, the focal length of the i-th lens counted from the object side in the imaging optical system group is fi, and the minimum value of fL / fi is MIN(fL / fi), which can satisfy the following conditions: -15.00 < MIN(fL / fi) < -2.80, where i is a positive integer and 1 ≤ i ≤ the total number of lenses in the imaging optical system group. Thereby, the refractive power configuration can be adjusted, which helps to reduce sensitivity and form an ultra-telephoto configuration. Among them, the following conditions can also be satisfied: -13.80 < MIN(fL / fi) < -3.80, where i is a positive integer and 1 ≤ i ≤ the total number of lenses in the imaging optical system group. Among them, the following conditions can also be satisfied: -12.50 < MIN(fL / fi) < -4.30, where i is a positive integer and 1 ≤ i ≤ the total number of lenses in the imaging optical system group. Among them, the following conditions can also be satisfied: -11.70 < MIN(fL / fi) < -5.00, where i is a positive integer and 1 ≤ i ≤ the total number of lenses in the imaging optical system group. Among them, the following conditions can also be satisfied: -11.51 ≤ MIN(fL / fi) ≤ -5.16, where i is a positive integer and 1 ≤ i ≤ the total number of lenses in the imaging optical system group.

[0167] The radius of curvature of the object-side surface of the third lens is R5, and the radius of curvature of the image-side surface of the third lens is R6. The total focal length of the imaging optical system group corresponding to an infinite object distance is fL, which can satisfy the following conditions: 0 < (R5 + R6) / fL < 3.50. Thereby, by restricting the bending degree of the surface shape of the third lens, it can help to guide light, so that the imaging optical system group can achieve a balance among the aperture size, the total length, and the telephoto structure. Among them, the following conditions can also be satisfied: 0.05 < (R5 + R6) / fL < 3.00. Among them, the following conditions can also be satisfied: 0.10 < (R5 + R6) / fL < 2.50. Among them, the following conditions can also be satisfied: 0.20 < (R5 + R6) / fL < 1.20. Among them, the following conditions can also be satisfied: 0.32 ≤ (R5 + R6) / fL ≤ 0.95.

[0168] When the imaging optical system group corresponds to an infinite object distance, the maximum distance between all adjacent lenses on the optical axis is ATLmax, and the maximum imaging height of the imaging optical system group (which can be half of the total length of the diagonal of the effective sensing area of the electronic photosensitive element) is ImgH, and the following conditions can be satisfied: 1.00 < ATLmax / ImgH < 6.00. Thereby, it is possible to avoid difficulties in assembly caused by excessive lens spacing, and it helps to improve the telescopic function of the imaging optical system group. Among them, the following conditions can also be satisfied: 1.10 < ATLmax / ImgH < 5.00. Among them, the following conditions can also be satisfied: 1.15 < ATLmax / ImgH < 4.50. Among them, the following conditions can also be satisfied: 1.20 < ATLmax / ImgH < 3.50. Among them, the following conditions can also be satisfied: 1.30 ≤ ATLmax / ImgH ≤ 3.30.

[0169] When the imaging optical system group corresponds to an infinite object distance, the total focal length is fL, and the focal length of the first lens group is fA1, and the following conditions can be satisfied: 1.20 < fL / fA1 < 3.00. Thereby, it is possible to adjust the refractive power at the front end of the imaging optical system group, which helps to compress the volume and reduce aberrations such as spherical aberration, and improve the imaging quality. Among them, the following conditions can also be satisfied: 1.25 < fL / fA1 < 2.80. Among them, the following conditions can also be satisfied: 1.35 < fL / fA1 < 2.65. Among them, the following conditions can also be satisfied: 1.49 ≤ fL / fA1 ≤ 2.48.

[0170] When the imaging optical system group corresponds to an infinite object distance, the maximum thickness of a single lens on the optical axis among all lenses of the imaging optical system group is CTmax, and the maximum distance between all adjacent lenses on the optical axis is ATLmax, and the following conditions can be satisfied: 0.20 < CTmax / ATLmax < 1.50. Thereby, it helps to balance the spatial configuration and control the total length of the imaging optical system group while maintaining a long focal length. Among them, the following conditions can also be satisfied: 0.20 < CTmax / ATLmax < 1.25. Among them, the following conditions can also be satisfied: 0.25 < CTmax / ATLmax < 1.00. Among them, the following conditions can also be satisfied: 0.38 ≤ CTmax / ATLmax ≤ 0.86.

[0171] The radius of curvature of the object-side surface of the third lens is R5, and the radius of curvature of the object-side surface of the first lens counted from the image side in the imaging optical system group is Rlast2, which can satisfy the following conditions: -1.50 < R5 / Rlast2 < 5.00. Thereby, it can help balance the optical path direction during the moving focus process, improve the field curvature situation, and reduce the generation of stray light. Among them, the following conditions can also be satisfied: -1.00 < R5 / Rlast2 < 4.50. Among them, the following conditions can also be satisfied: -0.80 < R5 / Rlast2 < 3.50. Among them, the following conditions can also be satisfied: -0.60 < R5 / Rlast2 < 2.30. Among them, the following conditions can also be satisfied: -0.29 ≤ R5 / Rlast2 ≤ 1.91.

[0172] The total focal length of the imaging optical system group corresponding to an infinite object distance is fL, and the focal length of the second lens is f2, which can satisfy the following conditions: -1.50 < fL / f2 < 4.50. Thereby, it helps control the convergence or divergence of light rays in the second lens, which is beneficial for aberration correction and improves the light-gathering quality of the entire field of view. Among them, the following conditions can also be satisfied: -1.20 < fL / f2 < 4.00. Among them, the following conditions can also be satisfied: -1.00 < fL / f2 < 3.00. Among them, the following conditions can also be satisfied: -0.80 < fL / f2 < 2.20. Among them, the following conditions can also be satisfied: -0.50 ≤ fL / f2 ≤ 1.87.

[0173] Half of the maximum viewing angle of the imaging optical system group corresponding to an infinite object distance is HFOVL, which can satisfy the following conditions: 1.0 degree < HFOVL < 7.5 degrees. Thereby, the imaging optical system group can have a telephoto characteristic and helps maintain the volume. Among them, the following conditions can also be satisfied: 1.5 degrees < HFOVL < 6.5 degrees. Among them, the following conditions can also be satisfied: 1.5 degrees < HFOVL < 6.0 degrees. Among them, the following conditions can also be satisfied: 3.0 degrees ≤ HFOVL ≤ 4.9 degrees.

[0174] The total focal length of the imaging optical system group corresponding to an infinite object distance is fL, and the entrance pupil diameter of the imaging optical system group is EPD, which can satisfy the following conditions: 1.40 < fL / EPD < 3.50. Thereby, it helps achieve a balance among the focal length, light input amount, and total weight of the imaging optical system group. Among them, the following conditions can also be satisfied: 1.70 < fL / EPD < 3.30.

[0175] The combined focal length of the first lens and the second lens is f12, and the combined focal length of the second lens and the third lens is f23, which can satisfy the following conditions: -0.35 < f12 / f23 < 3.00. Thereby, the lens configuration at the front end of the imaging optical system group can be adjusted, which helps to standardize the viewing angle and match the aperture design, and adjust the traveling direction of light. Among them, the following conditions can also be satisfied: -0.30 < f12 / f23 < 2.70. Among them, the following conditions can also be satisfied: -0.25 < f12 / f23 < 2.40.

[0176] 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 second lens is R3, which can satisfy the following conditions: -0.50 < (R1 - R3) / (R1 + R3) < 0.70. Thereby, the surface shape of the object-side surface of the first lens can be matched with the surface shape of the object-side surface of the second lens, which helps to reconcile the optical path and reduce spherical aberration. Among them, the following conditions can also be satisfied: -0.40 < (R1 - R3) / (R1 + R3) < 0.60.

[0177] The total focal length of the imaging optical system group corresponding to an infinite object distance is fL, the focal length of the fifth lens is f5, and the focal length of the sixth lens counted from the object side in the imaging optical system group is f6. The minimum value of fL / f5 and fL / f6 is MIN(fL / f5, fL / f6), which can satisfy the following conditions: -13.50 < MIN(fL / f5, fL / f6) < -1.00. Thereby, the refractive power configuration in the middle section of the imaging optical system group can be adjusted, which helps to form a telescopic structure. Among them, the following conditions can also be satisfied: -12.50 < MIN(fL / f5, fL / f6) < -1.50. Among them, the following conditions can also be satisfied: -11.20 < MIN(fL / f5, fL / f6) < -2.00. Among them, the following conditions can also be satisfied: -11.51 ≤ MIN(fL / f5, fL / f6) ≤ -2.33.

[0178] The thickness of the first lens on the optical axis is CT1, and the thickness of the second lens counted from the image side on the optical axis in the imaging optical system group is CTlast2, which can satisfy the following conditions: 0.03 < CTlast2 / CT1 < 0.80. By controlling the ratio of the central thickness of the first lens and the second-to-last lens, it helps to take into account the process limitations of the lens while reducing the volume of the imaging optical system group. Among them, the following conditions can also be satisfied: 0.04 < CTlast2 / CT1 < 0.70.

[0179] When the object distance of the imaging optical system group corresponds to infinity, the total focal length is fL, and the distance from the object-side surface of the first lens to the imaging surface on the optical axis is TL, which can satisfy the following conditions: 1.15 < fL / TL < 2.00. This helps to compress the total length under the long focal length specification and balance the focal length, depth of field, viewing angle, and total length. Among them, the following conditions can also be satisfied: 1.20 < fL / TL < 1.80. Among them, the following conditions can also be satisfied: 1.25 < fL / TL < 1.60.

[0180] When the object distance of the imaging optical system group corresponds to infinity, the total focal length is fL, and the focal length of the third lens is f3, which can satisfy the following conditions: 0 < |fL / f3| < 2.20. This can adjust the refractive power intensity of the third lens, help balance the refractive power distribution of the imaging optical system group, and reduce the sensitivity of the imaging optical system group. Among them, the following conditions can also be satisfied: 0.01 < |fL / f3| < 2.10. Among them, the following conditions can also be satisfied: 0.03 < |fL / f3| < 2.00.

[0181] The focal length of the third lens is f3, and the focal length of the second lens counted from the image side in the imaging optical system group is flast2, which can satisfy the following conditions: -6.50 < flast2 / f3 < 0.70. This helps to balance the light in different shooting states and can help correct astigmatism and distortion. Among them, the following conditions can also be satisfied: -5.00 < flast2 / f3 < 0.50.

[0182] 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 can satisfy the following conditions: 0 < T12 / T23 < 4.00. This can help reduce the difficulty of structural design and improve the assembly qualification rate of the lens. Among them, the following conditions can also be satisfied: 0.01 < T12 / T23 < 3.00. Among them, the following conditions can also be satisfied: 0.01 < T12 / T23 < 2.00.

[0183] When the object distance of the imaging optical system group corresponds to infinity, the total focal length is fL, which can satisfy the following conditions: 50.00 mm < fL < 80.00 mm. This can make the imaging optical system group have the telescopic effect of a long focal length to meet the application requirements of the product. Among them, the following conditions can also be satisfied: 52.00 mm < fL < 75.00 mm.

[0184] The maximum imaging height of the imaging optical system group is ImgH, which can satisfy the following conditions: 3.00 mm < ImgH < 5.50 mm. This can adjust the volume configuration of the imaging optical system group and help adjust the viewing angle and imaging surface size. Among them, the following conditions can also be satisfied: 3.50 mm < ImgH < 5.30 mm.

[0185] The combined focal length of the first lens and the second lens is f12, and the combined focal length of the fifth lens and the sixth lens counted from the object side in the imaging optical system group is f56, which can satisfy the following conditions: -4.30 < f12 / f56 < 0.30. Thereby, the refractive power distribution of the imaging optical system group can be adjusted, which helps to balance the optical path direction and enhance the telescopic effect of the long focal length. Among them, the following conditions can also be satisfied: -4.00 < f12 / f56 < 0.10. Among them, the following conditions can also be satisfied: -3.30 < f12 / f56 < 0.

[0186] The total focal length of the imaging optical system group corresponding to an infinite object distance is fL, the principal ray incident angle at the maximum imaging height position of the imaging optical system group corresponding to an infinite object distance is CRAL, and half of the maximum viewing angle of the imaging optical system group corresponding to an infinite object distance is HFOVL, which can satisfy the following conditions: 3.00 [mm / degree] < fL / (CRAL + HFOVL) < 15.00 [mm / degree]. Thereby, it can help to standardize the specifications of the appropriate viewing angle and focal length, and can improve the response efficiency of the electronic photosensitive element. Please refer to Figure 43 , which is a schematic diagram showing the parameter CRAL in the first embodiment of the present disclosure. In the first shooting state, a principal ray CRL is incident on the position of the maximum imaging height of the imaging surface IMG, and the angle between the normal direction of the imaging surface IMG and the principal ray CRL is the principal ray incident angle (CRAL).

[0187] The maximum effective radius of the lens surface closest to the image side of the first lens group of the imaging optical system group corresponding to an infinite object distance is YLA1Rlast, the maximum effective radius of the lens surface closest to the object side of the second lens group of the imaging optical system group corresponding to an infinite object distance is YLA2R1, and the distance parallel to the optical axis between the position of the maximum effective radius of the lens surface closest to the image side of the first lens group and the position of the maximum effective radius of the lens surface closest to the object side of the second lens group of the imaging optical system group corresponding to an infinite object distance is ETLA12, which can satisfy the following conditions: 0.27 < (YLA1Rlast - YLA2R1) / ETLA12 < 0.75. Thereby, it can cooperate with the central field optical path, effectively control the deflection angle of the edge optical path around the aperture, and help to improve the light-gathering quality of the imaging light. Please refer to Figure 42 , which is a schematic diagram showing the parameters YLA1Rlast, YLA2R1 and ETLA12 in the first shooting state in the first embodiment of the present disclosure.

[0188] The focal length of the second lens is f2, and the focal length of the fourth lens is f4, which can satisfy the following conditions: -0.20 < f4 / f2 < 0.85. Thus, the refractive powers of the second lens and the fourth lens can be coordinated with each other, which helps to correct aberrations such as chromatic aberration and spherical aberration. Among them, the following conditions can also be satisfied: 0 < f4 / f2 < 0.75.

[0189] The entrance pupil diameter of the imaging optical system group is EPD, which can satisfy the following conditions: 15.00 mm < EPD < 32.00 mm. Thus, it helps to increase the aperture to expand the application range. Among them, the following conditions can also be satisfied: 17.00 mm < EPD < 30.00 mm.

[0190] When the imaging optical system group corresponds to an infinite object distance, the distance parallel to the optical axis between the maximum effective radius position of the object side surface of the third lens and the maximum effective radius position of the image side surface of the third lens is ETL3, and the thickness of the third lens on the optical axis is CT3, which can satisfy the following conditions: 0.15 < ETL3 / CT3 < 3.00. Thus, the ratio of the center thickness to the edge thickness of the third lens can be adjusted, which helps to harmonize the edge optical path and strengthen the mechanical strength of the third lens at the same time. Please refer to Figure 42 , which is a schematic diagram showing the parameter ETL3 in the first shooting state according to the first embodiment of the present disclosure.

[0191] When the imaging optical system group corresponds to an infinite object distance, the distance parallel to the optical axis between the maximum effective radius position of the object side surface of the last lens and the maximum effective radius position of the image side surface of the last lens is ETLlast, and the thickness of the last lens on the optical axis is CTlast, which can satisfy the following conditions: 0.15 < ETLlast / CTlast < 2.00. Thus, the ratio of the center thickness to the edge thickness of the last lens can be adjusted, which helps to form the lens and reduce the sensitivity of the imaging optical system group at the same time. Please refer to Figure 42 , which is a schematic diagram showing the parameter ETLlast in the first shooting state according to the first embodiment of the present disclosure.

[0192] The distance between the first lens and the second lens on the optical axis is T12, and when the imaging optical system group corresponds to an infinite object distance, the distance parallel to the optical axis between the maximum effective radius position of the image side surface of the first lens and the maximum effective radius position of the object side surface of the second lens is ETL12, which can satisfy the following conditions: 0.05 < 10×T12 / ETL12 < 3.50. Thus, the distance between the first lens and the second lens can be effectively controlled to reduce the generation of stray light while reducing the volume. Please refer to Figure 42 , which is a schematic diagram showing the parameter ETL12 in the first shooting state according to the first embodiment of the present disclosure.

[0193] The maximum imaging height of the imaging optical system group is ImgH, and the entrance pupil diameter of the imaging optical system group is EPD, which can meet the following conditions: 0.10 < 2×ImgH / EPD < 0.70. Thereby, it helps to adjust the aperture and the size of the imaging surface and enhance the light input of the imaging optical system group. Among them, the following conditions can also be met: 0.15 < 2×ImgH / EPD < 0.55.

[0194] When the imaging optical system group corresponds to an infinite object distance, the maximum effective radius of the object side surface of the first lens is YL1R1, and when the imaging optical system group corresponds to an infinite object distance, the maximum effective radius of the image side surface of the eighth lens is YL8R2, which can meet the following conditions: 2.00 < YL1R1 / YL8R2 < 4.00. Thereby, the outer diameter ratio of the object side end and the image side end of the imaging optical system group can be adjusted to achieve a balance between the viewing angle and the volume. Among them, the following conditions can also be met: 2.10 < YL1R1 / YL8R2 < 3.85. Please refer to Figure 42 , which is a schematic diagram showing the parameters YL1R1 and YL8R2 in the first shooting state according to the first embodiment of the present disclosure.

[0195] The Abbe number of the sixth lens is V6, and the refractive index of the sixth lens is N6, which can meet the following conditions: 5.00 < V6 / N6 < 14.80. Thereby, chromatic aberration can be effectively corrected and the light condensing quality in various shooting states can be improved. Among them, the following conditions can also be met: 5.50 < V6 / N6 < 13.80.

[0196] When the imaging optical system group corresponds to an infinite object distance, the total focal length is fL, and the focal length of the fourth lens is f4, which can meet the following conditions: 2.50 < fL / f4 < 5.20. Thereby, it helps to enhance the ability of the fourth lens to converge light, which is beneficial to balancing the super-telephoto structure and miniaturization of the volume. Among them, the following conditions can also be met: 2.60 < fL / f4 < 5.00.

[0197] The spacing distance between the fifth lens and the sixth lens on the optical axis is T56, the thickness of the fourth lens on the optical axis is CT4, the thickness of the fifth lens on the optical axis is CT5, and the thickness of the sixth lens on the optical axis is CT6, which can meet the following conditions: 0.05 < (T56 + CT6) / (CT4 + CT5) < 0.75. Thereby, it is beneficial to increase the space utilization rate and reduce the manufacturing tolerance. Among them, the following conditions can also be met: 0.10 < (T56 + CT6) / (CT4 + CT5) < 0.65.

[0198] All the technical features in the imaging optical system group disclosed in the above present disclosure can be combined and configured to achieve the corresponding effects.

[0199] In the camera optical system assembly disclosed in this disclosure, the lens material can be glass or plastic. If the lens is made of glass, the freedom of refractive power configuration of the camera optical system assembly can be increased, and the influence of external environmental temperature changes on imaging can be reduced. Glass lenses can be manufactured using techniques such as grinding or molding. If the lens material is plastic, production costs can be effectively reduced. Furthermore, spherical (SPH) or aspherical (ASP) surfaces can be incorporated into the lens surface. Spherical lenses reduce manufacturing difficulty, while aspherical surfaces provide more controllable variables to reduce aberrations, decrease the number of lenses, and effectively reduce the overall length of the camera optical system assembly disclosed in this disclosure. Further, aspherical surfaces can be manufactured using methods such as plastic injection molding or molding glass lenses.

[0200] In the camera optical system group disclosed in this disclosure, if the lens surface is aspherical, it means that all or part of the optically effective area of ​​the lens surface is aspherical.

[0201] In the imaging optical system assembly disclosed herein, 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 a plastic material and manufactured into a lens using injection molding technology. Additionally, the additives can also be deposited on the lens surface as a coating to provide the aforementioned effects.

[0202] In the camera optical system group disclosed in this disclosure, if the lens surface is convex and the location 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 location 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, radius of curvature, or focal length of the lens is not defined in its region, it means that the refractive power, radius of curvature, or focal length of the lens can be the refractive power, radius of curvature, or focal length of the lens near the optical axis.

[0203] In the camera optical system group disclosed herein, the imaging surface of the camera optical system group 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.

[0204] In the imaging optical system assembly disclosed herein, one or more imaging correction elements (such as planar elements) can be selectively disposed 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 (such as image distortion). 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.

[0205] The camera optical system assembly disclosed herein may include at least one aperture stop, 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, and may be used to reduce stray light and help improve image quality.

[0206] This disclosure may appropriately incorporate a variable aperture element, which can be a mechanical component or a light-regulating element, capable of electrically or signal-controlled aperture size and shape. The mechanical component may include movable parts such as blade assemblies or shielding plates; the light-regulating element may include shielding materials such as filter elements, electrochromic materials, or liquid crystal layers. The variable aperture element can enhance image adjustment capabilities by controlling the amount of light entering the image or the exposure time. Furthermore, the variable aperture element can also be the aperture of this disclosure, allowing adjustment of image quality, such as depth of field or exposure speed, by changing the aperture value.

[0207] This disclosure allows for the appropriate placement of one or more optical elements to restrict the passage of light through a camera optical system assembly. These optical elements may be filters, polarizers, etc., but this disclosure is not limited thereto. Furthermore, the optical elements may be monolithic elements, composite components, or thin films, but this disclosure is not limited thereto. The optical elements may be placed between the object end, image end, or lenses of the camera optical system assembly to control the passage of specific types of light, thereby meeting application requirements.

[0208] The imaging optical system assembly disclosed herein may include at least one optical lens, optical element, or carrier, at least one surface of which has a low-reflection layer, which can effectively reduce stray light generated by light reflection at the interface. The low-reflection layer may be disposed in the ineffective area of ​​the object-side surface or image-side surface of the optical lens, or on the connecting surface between the object-side surface and the image-side surface; the optical element may be a light-shielding element, an annular spacer element, a lens barrel element, a cover glass, blue glass, a filter element (color filter), a light path deflection element (reflective element), a prism, or a mirror, etc.; the carrier may be a lens mount, a microlens disposed on the photosensitive element, the periphery of the photosensitive element substrate, or a glass sheet used to protect the photosensitive element, etc.

[0209] The imaging optical system assembly disclosed herein may further include a light-shielding element. The opening of the light-shielding element may be non-circular, and the non-circular opening may have different effective radii in different directions perpendicular to the optical axis. This allows for the use of a non-circular lens or aperture, effectively saving space and fully utilizing the light passing through the non-circular lens or aperture, thus helping to reduce stray light. The periphery of the inner hole of the light-shielding element may contain a wavy or serrated structure.

[0210] In the camera optical system group disclosed herein, the object side and image side are determined according to the optical axis direction, and the data on the optical axis are calculated along the optical axis. Furthermore, if the optical axis is deflected by an optical path deflection element, the data on the optical axis are also calculated along the optical axis.

[0211] Based on the above implementation methods, specific embodiments are presented below and described in detail with reference to the accompanying drawings.

[0212] <First Embodiment>

[0213] Please refer to Figures 1 to 3 ,in Figure 1 The diagram illustrates the imaging device according to the first embodiment of this disclosure in a first shooting state and a second shooting state. Figure 2 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the first embodiment in the first shooting state. Figure 3 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the first embodiment in the second shooting state. Figure 1 The upper part is a schematic diagram of the camera optical system assembly in the first shooting state, while Figure 1 The lower half is a schematic diagram of the camera optical system assembly in the second shooting state. Figure 1As can be seen, the image capturing device 1 includes a camera optical system assembly (unlabeled) and an electronic photosensitive element IS. The camera optical system assembly, along the optical path from the object side to the image side, sequentially includes a first lens E1, a second lens E2, an aperture ST, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, an aperture stop S1, a seventh lens E7, an eighth lens E8, a filter element E10, and an imaging surface IMG. More specifically, the camera optical system assembly, along the optical path from the object side to the image side, has a first lens group A1, an aperture ST, and a second lens group A2, wherein the first lens group A1 includes the first lens E1 and the second lens E2, and the second lens group A2 includes the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, and the eighth lens E8. The electronic photosensitive element IS is disposed on the imaging surface IMG. The camera optical system assembly contains eight lenses (E1, E2, E3, E4, E5, E6, E7, E8), and there are no other interposed lenses between each lens.

[0214] In the camera optical system assembly of the first embodiment, the first to eighth lenses, counted from the object side, are respectively the first lens E1 to the eighth lens E8, and the first to eighth lenses, counted from the image side, correspond to the eighth lens E8 to the first lens E1, wherein the eighth lens E8 can also be referred to as the last lens.

[0215] The camera optical system assembly of the first embodiment performs a focusing process by moving at least one of its lenses. The camera optical system assembly, through the focusing process, has a first shooting state corresponding to an infinity object distance and a second shooting state corresponding to a finite object distance of 10000.000 mm. The first shooting state is the state of the camera optical system assembly when the subject is at infinity (infinity object distance), while the second shooting state is the state of the camera optical system assembly when the subject is at a finite object distance (finite object distance). When the subject moves from infinity to a finite object distance, the camera optical system assembly performs a focusing process to change from the first shooting state to the second shooting state. Conversely, when the subject moves from a finite object distance to infinity, the camera optical system assembly also performs a focusing process to change from the second shooting state to the first shooting state. During the focusing process, the eighth lens E8 of the camera optical system assembly moves along the optical axis.

[0216] The first lens group A1 has positive refractive power, and the second lens group A2 has negative refractive power.

[0217] The first lens E1 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0218] The second lens E2 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are spherical.

[0219] The third lens E3 has negative refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0220] The fourth lens E4 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are spherical.

[0221] The fifth lens, E5, has negative refractive power and is made of glass. Its object-side surface is concave near the optical axis, and its image-side surface is also concave near the optical axis. Both surfaces are spherical. The object-side surface of the fifth lens, E5, is bonded to the image-side surface of the fourth lens, E4.

[0222] 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.

[0223] The seventh lens, E7, has negative refractive power and is made of glass. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0224] The eighth lens, E8, 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.

[0225] The filter element E10 is made of glass and is located between the eighth lens E8 and the imaging surface IMG. It does not affect the focal length of the camera optical system group.

[0226] In the camera optical system group, the lens with the smallest effective radius among all lenses at the corresponding infinity object distance is the seventh lens, E7.

[0227] The maximum distance between all adjacent lenses in the camera optical system group on the optical axis is located between the sixth lens E6 and the seventh lens E7.

[0228] In the second lens group A2, the third lens E3 is a convex-concave lens. The fourth lens E4, a biconvex positive lens, and the fifth lens E5, a biconcave negative lens, combine to form an achromatic lens group with negative refractive power. The sixth lens E6 is an aspherical lens.

[0229] The equations for the aspherical surfaces of the above lenses are expressed as follows:

[0230]

[0231] 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;

[0232] Y: The perpendicular distance between a point on the aspherical curve and the optical axis;

[0233] R: Radius of curvature;

[0234] k: cone coefficient; and

[0235] Ai: The i-th order aspherical coefficient.

[0236] The total focal length of the camera optical system group at the corresponding infinity object distance is fL, the aperture value (F-number) of the camera optical system group at the corresponding infinity object distance is FnoL, half of the maximum angle of view of the camera optical system group at the corresponding infinity object distance is HFOVL, and the maximum angle of view of the camera optical system group at the corresponding infinity object distance is FOVL, which satisfies the following conditions: fL = 64.50 mm; FnoL = 3.00; HFOVL = 3.8 degrees; and FOVL = 7.6 degrees.

[0237] The total focal length of the camera optical system group at the corresponding finite object distance (10000.000 mm) is fS, the aperture value of the camera optical system group at the corresponding finite object distance (10000.000 mm) is FnoS, half of the maximum angle of view of the camera optical system group at the corresponding finite object distance (10000.000 mm) is HFOVS, and the maximum angle of view of the camera optical system group at the corresponding finite object distance (10000.000 mm) is FOVS, which satisfies the following conditions: fS = 63.82 mm; FnoS = 2.97; HFOVS = 3.8 degrees; and FOVS = 7.6 degrees.

[0238] In this embodiment, D0 is the distance on the optical axis between the subject and the object-side surface of the first lens E1 (approximately equivalent to the object distance of the imaging optical system assembly), D1 is the distance on the optical axis between the image-side surface of the seventh lens E7 and the object-side surface of the eighth lens E8, and D2 is the distance on the optical axis between the image-side surface of the eighth lens E8 and the filter element E10. When the imaging optical system assembly is in the first shooting state and the second shooting state through the focusing process, the object distance of the imaging optical system assembly will differ from the values ​​of D0 to D2. In the first shooting state, the imaging optical system assembly satisfies the following conditions: object distance = ∞ (infinity); D0 = ∞; D1 = 5.855 mm; and D2 = 4.445 mm. In the second shooting state, the imaging optical system assembly satisfies the following conditions: object distance = 10000.000 mm; D0 = 10000.000 mm; D1 = 5.330 mm; and D2 = 4.970 mm.

[0239] The entrance pupil diameter of the camera optical system assembly is EPD, which satisfies the following condition: EPD = 21.50 mm.

[0240] The maximum imaging height of the camera optical system assembly is ImgH, which satisfies the following condition: ImgH = 4.35 mm.

[0241] The focal length of the first lens group A1 is fA1, which satisfies the following condition: fA1 = 29.52 mm.

[0242] The focal length of the second lens group A2 is fA2, which satisfies the following condition: fA2 = -27.65 mm.

[0243] The total focal length of the camera optical system group at the corresponding infinity object distance is fL, and the entrance pupil diameter of the camera optical system group is EPD, which satisfies the following condition: fL / EPD=3.00.

[0244] The total focal length of the camera optical system group at an infinity object distance is fL. The focal length of the first lens E1 is f1, the second lens E2 is f2, the third lens E3 is f3, the fourth lens E4 is f4, the fifth lens E5 is f5, the sixth lens E6 is f6, the seventh lens E7 is f7, and the eighth lens E8 is f8. The focal length of the i-th lens in the camera optical system group from the object side is fi. The minimum value of fL / fi is MIN(fL / fi), which satisfies the following condition: MIN(fL / fi)=-5.78, where i is a positive integer and 1≤i≤8. In this embodiment, among the first lens E1 to the eighth lens E8, fL / f7 is less than fL / f1, fL / f2, fL / f3, fL / f4, fL / f5, fL / f6, and fL / f8, therefore MIN(fL / f7) is equal to fL / f7.

[0245] The total focal length of the camera optical system group at an infinity object distance is fL. The focal length of the fifth lens E5 is f5, and the focal length of the sixth lens E6 is f6. The minimum value of fL / f5 and fL / f6 is MIN(fL / f5, fL / f6), which satisfies the following condition: MIN(fL / f5, fL / f6) = -4.85. In this embodiment, among the first lens E1 to the eighth lens E8, fL / f5 is less than fL / f6, therefore MIN(fL / f5, fL / f6) is equal to fL / f5.

[0246] The total focal length of the camera optical system group at the corresponding infinity object distance is fL, and the distance from the object-side surface of the first lens E1 to the imaging plane IMG on the optical axis is TL, which satisfies the following condition: fL / TL=1.37.

[0247] The total focal length of the camera optical system group at the corresponding infinity object distance is fL, and the focal length of the first lens group A1 is fA1, which satisfies the following condition: fL / fA1=2.19.

[0248] The total focal length of the camera optical system group at the corresponding infinity object distance is fL, and the focal length of the second lens E2 is f2, which satisfies the following condition: fL / f2=1.48.

[0249] The total focal length of the camera optical system group at the corresponding infinity object distance is fL, and the focal length of the third lens E3 is f3, which satisfies the following condition: |fL / f3|=0.73.

[0250] The total focal length of the camera optical system group at the corresponding infinity object distance is fL, and the focal length of the fourth lens E4 is f4, which satisfies the following condition: fL / f4=3.65.

[0251] The focal length of the second lens E2 is f2, and the focal length of the fourth lens E4 is f4, which satisfies the following condition: f4 / f2 = 0.41.

[0252] The focal length of the third lens E3 is f3, and the focal length of the second lens in the imaging optical system assembly, counting from the image side, is flast2, which satisfies the following condition: flast2 / f3 = 0.13. In this embodiment, the second lens in the imaging optical system assembly, counting from the image side, is the seventh lens E7.

[0253] The combined focal length of the first lens E1 and the second lens E2 is f12, and the combined focal length of the second lens E2 and the third lens E3 is f23, which satisfies the following condition: f12 / f23=0.38.

[0254] The combined focal length of the first lens E1 and the second lens E2 is f12. The combined focal length of the fifth lens E5 and the sixth lens (counting from the object side) in the imaging optical system group is f56, which satisfies the following condition: f12 / f56 = -2.00. In this embodiment, the sixth lens (counting from the object side) in the imaging optical system group is the sixth lens E6.

[0255] The radius of curvature of the object-side surface of the third lens E3 is R5, and the radius of curvature of the image-side surface of the third lens E3 is R6. The total focal length of the camera optical system group at the corresponding infinity object distance is fL, which satisfies the following condition: (R5+R6) / fL=0.55.

[0256] 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 second lens E2 is R3, which satisfies the following condition: (R1-R3) / (R1+R3)=-0.12.

[0257] The radius of curvature of the object-side surface of the third lens E3 is R5, and the radius of curvature of the object-side surface of the first lens in the imaging optical system assembly, counting from the image side, is Rlast2, which satisfies the following condition: R5 / Rlast2 = 1.43. In this embodiment, the first lens in the imaging optical system assembly, counting from the image side, is the eighth lens E8.

[0258] The maximum thickness of a single lens on the optical axis among all lenses in the camera optical system group is CTmax. The maximum distance between all adjacent lenses on the optical axis at an infinity object distance is ATLmax, which satisfies the following condition: CTmax / ATLmax = 0.48. In this embodiment, the distance between two adjacent lenses on the optical axis refers to the distance between two adjacent mirror surfaces of two adjacent lenses on the optical axis. In this embodiment, among the first lens E1 to the eighth lens E8, the thickness of the fourth lens E4 on the optical axis is greater than the thickness of the other lenses on the optical axis, therefore CTmax is equal to the thickness of the fourth lens E4 on the optical axis. In this embodiment, among the first lens E1 to the eighth lens E8, the distance between the sixth lens E6 and the seventh lens E7 on the optical axis at an infinity object distance is greater than the distance between the other adjacent lenses on the optical axis, therefore ATLmax is equal to the distance between the sixth lens E6 and the seventh lens E7 on the optical axis.

[0259] The thickness of the first lens E1 on the optical axis is CT1, and the thickness of the second lens in the imaging optical system assembly, measured from the image side, on the optical axis is CTlast2, which satisfies the following condition: CTlast2 / CT1 = 0.20. In this embodiment, the second lens in the imaging optical system assembly, measured from the image side, is the seventh lens E7.

[0260] The distance between the first lens E1 and the second lens E2 on the optical axis is T12, and the distance between the second lens E2 and the third lens E3 on the optical axis is T23, which satisfies the following condition: T12 / T23=0.07.

[0261] The distance between the fifth lens E5 and the sixth lens E6 on the optical axis is T56. The thickness of the fourth lens E4 on the optical axis is CT4. The thickness of the fifth lens E5 on the optical axis is CT5. The thickness of the sixth lens E6 on the optical axis is CT6. They satisfy the following condition: (T56+CT6) / (CT4+CT5)=0.17.

[0262] The maximum distance between all adjacent lenses on the optical axis of the camera optical system group at the corresponding infinity object distance is ATLmax, and the maximum imaging height of the camera optical system group is ImgH, which satisfies the following condition: ATLmax / ImgH=2.71.

[0263] The Abbe number of the sixth lens E6 is V6, and the refractive index of the sixth lens E6 is N6, which satisfies the following condition: V6 / N6 = 8.21.

[0264] The maximum imaging height of the camera optical system group is ImgH, and the entrance pupil diameter of the camera optical system group is EPD, which satisfies the following condition: 2×ImgH / EPD=0.40.

[0265] The total focal length of the camera optical system group at the corresponding infinity object distance is fL, the incident angle of the principal ray at the maximum imaging height position at the corresponding infinity object distance is CRAL, and half of the maximum angle of view of the camera optical system group at the corresponding infinity object distance is HFOVL, which satisfies the following condition: fL / (CRAL+HFOVL)=6.51[mm / degree].

[0266] When the camera optical system group is at an infinity object distance, the distance parallel to the optical axis between the maximum effective radius position of the object-side surface of the third lens E3 and the maximum effective radius position of the image-side surface of the third lens E3 is ETL3, and the thickness of the third lens E3 on the optical axis is CT3, which satisfies the following condition: ETL3 / CT3=1.31.

[0267] The distance parallel to the optical axis between the maximum effective radius position of the object-side surface of the last lens and the maximum effective radius position of the image-side surface of the last lens at an infinity object distance is ETLlast, and the thickness of the last lens on the optical axis is CTlast, which satisfies the following condition: ETLlast / CTlast = 0.49. In this embodiment, the last lens is the eighth lens E8.

[0268] The distance between the first lens E1 and the second lens E2 on the optical axis is T12. When the camera optical system group corresponds to the maximum effective radius position of the image side surface of the first lens E1 and the maximum effective radius position of the object side surface of the second lens E2 at infinity, the distance parallel to the optical axis is ETL12, which satisfies the following condition: 10×T12 / ETL12=0.58.

[0269] The maximum effective radius of the object-side surface of the first lens E1 in the camera optical system group is YL1R1 when the object distance is at infinity, and the maximum effective radius of the image-side surface of the eighth lens E8 in the camera optical system group is YL8R2 when the object distance is at infinity. They satisfy the following condition: YL1R1 / YL8R2=2.45.

[0270] At an infinity object distance, the maximum effective radius of the lens surface closest to the image side of the first lens group A1 is YLA1Rlast, and the maximum effective radius of the lens surface closest to the object side of the second lens group A2 is YLA2R1. The distance parallel to the optical axis between the positions of the maximum effective radii of the lens surfaces closest to the image side of the first lens group A1 and the maximum effective radii of the lens surfaces closest to the object side of the second lens group A2 is ETLA12, which satisfies the following condition: (YLA1Rlast - YLA2R1) / ETLA12 = 0.42. In this embodiment, the lens surface closest to the image side of the first lens group A1 is the image-side surface of the second lens E2, and the lens surface closest to the object side of the second lens group A2 is the object-side surface of the third lens E3.

[0271] Please refer to Tables 1A to 1C below.

[0272]

[0273]

[0274] Table 1A contains detailed structural data for the first embodiment, where the units for radius of curvature, thickness, and focal length are millimeters (mm), and surfaces 0 to 20 sequentially represent the surfaces along the optical axis from the object side to the image side.

[0275]

[0276] Table 1B contains parameters for the first and second shooting states of the camera optical system assembly under different focusing conditions. It should be understood that this embodiment only discloses two focusing states, such as the first and second shooting states, but this disclosure is not limited to the disclosed states. Furthermore, the camera optical system assembly of this embodiment may have other focusing states with different focal lengths besides the first and second shooting states, to correspond to focusing states with other different object distances.

[0277] As can be seen from Tables 1A and 1B, the eighth lens E8 moves along the optical axis during the focusing process.

[0278]

[0279]

[0280] Table 1C shows the aspherical data in the first embodiment, where k is the conical coefficient in the aspherical curve equation, and A4 to A16 represent the 4th to 16th order aspherical coefficients of each surface.

[0281] In addition, the tables in the following embodiments are schematic diagrams and aberration curves corresponding to each embodiment. The definitions of the data in the tables are the same as those in Tables 1A to 1C of the first embodiment, and will not be repeated here.

[0282] <Second Embodiment>

[0283] Please refer to Figures 4 to 6 ,in Figure 4 The diagram illustrates the imaging device according to the second embodiment of this disclosure in a first shooting state and a second shooting state. Figure 5 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the second embodiment in the first shooting state. Figure 6 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the second embodiment in the second shooting state. Figure 4 The upper part is a schematic diagram of the camera optical system assembly in the first shooting state, while Figure 4 The lower half is a schematic diagram of the camera optical system assembly in the second shooting state. Figure 4 It is known that the image capturing device 2 includes a camera optical system assembly (unlabeled) and an electronic photosensitive element IS. The camera optical system assembly, along the optical path from the object side to the image side, sequentially includes a first lens E1, an aperture ST, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an aperture stop S1, an eighth lens E8, a ninth lens E9, a filter element E10, and an imaging surface IMG. More specifically, the camera optical system assembly, along the optical path from the object side to the image side, has a first lens group A1, an aperture ST, and a second lens group A2, wherein the first lens group A1 includes the first lens E1, and the second lens group A2 includes the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the eighth lens E8, and the ninth lens E9. The electronic photosensitive element IS is disposed on the imaging surface IMG. The camera optical system assembly contains nine lenses (E1, E2, E3, E4, E5, E6, E7, E8, E9), and there are no other interposed lenses between the lenses.

[0284] In the camera optical system assembly of the second embodiment, the first to ninth lenses, counted from the object side, are respectively the first lens E1 to the ninth lens E9, and the first to ninth lenses, counted from the image side, correspond to the ninth lens E9 to the first lens E1, wherein the ninth lens E9 can also be referred to as the last lens.

[0285] The camera optical system assembly of the second embodiment performs a focusing process by moving at least one of its lenses. The camera optical system assembly, through the focusing process, has a first shooting state corresponding to an infinity object distance and a second shooting state corresponding to a finite object distance of 10000.000 mm. The first shooting state is the state of the camera optical system assembly when the subject is at infinity (infinity object distance), while the second shooting state is the state of the camera optical system assembly when the subject is at a finite object distance (finite object distance). When the subject moves from infinity to a finite object distance, the camera optical system assembly performs a focusing process to change from the first shooting state to the second shooting state. Conversely, when the subject moves from a finite object distance to infinity, the camera optical system assembly also performs a focusing process to change from the second shooting state to the first shooting state. During the focusing process, the eighth lens E8 of the camera optical system assembly moves along the optical axis.

[0286] The first lens group A1 has positive refractive power, and the second lens group A2 has negative refractive power.

[0287] The first lens E1 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[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 of its surfaces are aspherical.

[0289] The third lens E3 has negative refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0290] The fourth lens E4 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are spherical.

[0291] The fifth lens, E5, has negative refractive power and is made of glass. Its object-side surface is concave near the optical axis, and its image-side surface is also concave near the optical axis. Both surfaces are spherical. The object-side surface of the fifth lens, E5, is bonded to the image-side surface of the fourth lens, E4.

[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 convex near the optical axis. Both of its surfaces are aspherical.

[0293] The seventh lens, E7, has negative refractive power and is made of glass. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0294] The eighth lens, E8, 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.

[0295] The ninth lens, E9, 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.

[0296] The filter element E10 is made of glass and is located between the ninth lens E9 and the imaging surface IMG. It does not affect the focal length of the camera optical system group.

[0297] In the camera optical system group, the lens with the smallest effective radius among all lenses at the corresponding infinity object distance is the seventh lens, E7.

[0298] The maximum distance between all adjacent lenses in the camera optical system group on the optical axis is located between the seventh lens E7 and the eighth lens E8.

[0299] In the second lens group A2, the third lens E3 is a convex-concave lens. The fourth lens E4, a biconvex positive lens, and the fifth lens E5, a biconcave negative lens, combine to form an achromatic lens group with negative refractive power. The sixth lens E6 is an aspherical lens.

[0300] Please refer to Tables 2A to 2D below.

[0301]

[0302]

[0303]

[0304] The definitions in Table 2B are the same as in the first embodiment, except that D1 is the distance on the optical axis between the aperture stop S1 and the object-side surface of the eighth lens E8, and D2 is the distance on the optical axis between the image-side surface of the eighth lens E8 and the object-side surface of the ninth lens E9. Furthermore, the camera optical system assembly of this embodiment can also have other focusing states with different focal lengths in addition to the first and second shooting states, to correspond to focusing states with other different object distances.

[0305] As can be seen from Tables 2A and 2B, the eighth lens E8 moves along the optical axis during the focusing process.

[0306]

[0307] The equations for the aspherical curves in Table 2C are represented in the form of the first embodiment.

[0308]

[0309]

[0310] The definitions described in Table 2D are the same as those in the first embodiment.

[0311] <Third Embodiment>

[0312] Please refer to Figures 7 to 9 ,in Figure 7 The diagram illustrates the imaging device according to the third embodiment of this disclosure in a first shooting state and a second shooting state. Figure 8 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the third embodiment in the first shooting state. Figure 9 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the third embodiment in the second shooting state. Figure 7 The upper part is a schematic diagram of the camera optical system assembly in the first shooting state, while Figure 7 The lower half is a schematic diagram of the camera optical system assembly in the second shooting state. Figure 7 It is known that the image capturing device 3 includes a camera optical system assembly (unlabeled) and an electronic photosensitive element IS. The camera optical system assembly, along the optical path from the object side to the image side, sequentially includes a first lens E1, a second lens E2, an aperture ST, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an aperture stop S1, an eighth lens E8, a filter element E10, and an imaging surface IMG. More specifically, the camera optical system assembly, along the optical path from the object side to the image side, has a first lens group A1, an aperture ST, and a second lens group A2, wherein the first lens group A1 includes the first lens E1 and the second lens E2, and the second lens group A2 includes the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, and the eighth lens E8. The electronic photosensitive element IS is disposed on the imaging surface IMG. The camera optical system assembly contains eight lenses (E1, E2, E3, E4, E5, E6, E7, E8), and there are no other interposed lenses between each lens.

[0313] In the camera optical system group of the third embodiment, the first to eighth lenses, counted from the object side, are respectively the first lens E1 to the eighth lens E8, and the first to eighth lenses, counted from the image side, correspond to the eighth lens E8 to the first lens E1, wherein the eighth lens E8 can also be referred to as the last lens.

[0314] The camera optical system assembly of the third embodiment performs a focusing process by moving at least one of its lenses. The camera optical system assembly, through the focusing process, has a first shooting state corresponding to an infinity object distance and a second shooting state corresponding to a finite object distance of 10000.000 mm. The first shooting state is the state of the camera optical system assembly when the subject is at infinity (infinity object distance), while the second shooting state is the state of the camera optical system assembly when the subject is at a finite object distance (finite object distance). When the subject moves from infinity to a finite object distance, the camera optical system assembly performs a focusing process to change from the first shooting state to the second shooting state. Conversely, when the subject moves from a finite object distance to infinity, the camera optical system assembly also performs a focusing process to change from the second shooting state to the first shooting state. During the focusing process, the eighth lens E8 of the camera optical system assembly moves along the optical axis.

[0315] The first lens group A1 has positive refractive power, and the second lens group A2 has negative refractive power.

[0316] The first lens E1 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0317] The second lens E2 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0318] The third lens E3 has negative refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0319] The fourth lens E4 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are spherical.

[0320] The fifth lens, E5, has negative refractive power and is made of glass. Its object-side surface is concave near the optical axis, and its image-side surface is also concave near the optical axis. Both surfaces are spherical. The object-side surface of the fifth lens, E5, is bonded to the image-side surface of the fourth lens, E4.

[0321] 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.

[0322] The seventh lens, E7, has negative refractive power and is made of glass. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are spherical.

[0323] The eighth lens, E8, 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.

[0324] The filter element E10 is made of glass and is located between the eighth lens E8 and the imaging surface IMG. It does not affect the focal length of the camera optical system group.

[0325] In the camera optical system group, the lens with the smallest effective radius among all lenses at the corresponding infinity object distance is the seventh lens, E7.

[0326] The maximum distance between all adjacent lenses in the camera optical system group on the optical axis is located between the sixth lens E6 and the seventh lens E7.

[0327] In the second lens group A2, the third lens E3 is a convex-concave lens. The fourth lens E4, a biconvex positive lens, and the fifth lens E5, a biconcave negative lens, combine to form an achromatic lens group with negative refractive power. The sixth lens E6 is an aspherical lens.

[0328] Please refer to Tables 3A to 3D below.

[0329]

[0330]

[0331] The definitions in Table 3B are the same as in the first embodiment, except that D1 is the distance on the optical axis between the image-side surface of the seventh lens E7 and the aperture stop S1. Furthermore, in addition to the first and second shooting states, the camera optical system assembly of this embodiment can also have other focusing states with different focal lengths to correspond to other focusing states with different object distances.

[0332] As can be seen from Tables 3A and 3B, the aperture stop S1 and the eighth lens E8 move along the optical axis during the focusing process.

[0333]

[0334] The equations for the aspherical surfaces in Table 3C are expressed in the form of the first embodiment.

[0335]

[0336]

[0337] The definitions described in Table 3D are the same as those in the first embodiment.

[0338] <Fourth Embodiment>

[0339] Please refer to Figures 10 to 12 ,in Figure 10The diagram illustrates the imaging device according to the fourth embodiment of this disclosure in a first shooting state and a second shooting state. Figure 11 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the fourth embodiment in the first shooting state. Figure 12 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the fourth embodiment in the second shooting state. Figure 10 The upper part is a schematic diagram of the camera optical system assembly in the first shooting state, while Figure 10 The lower half is a schematic diagram of the camera optical system assembly in the second shooting state. Figure 10 It is known that the image capturing device 4 includes a camera optical system assembly (unlabeled) and an electronic photosensitive element IS. The camera optical system assembly, along the optical path from the object side to the image side, sequentially includes a first lens E1, an aperture ST, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an aperture stop S1, an eighth lens E8, a filter element E10, and an imaging surface IMG. More specifically, the camera optical system assembly, along the optical path from the object side to the image side, has a first lens group A1, an aperture ST, and a second lens group A2, wherein the first lens group A1 includes the first lens E1, and the second lens group A2 includes the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, and the eighth lens E8. The electronic photosensitive element IS is disposed on the imaging surface IMG. The camera optical system assembly contains eight lenses (E1, E2, E3, E4, E5, E6, E7, E8), and there are no other interposed lenses between each lens.

[0340] In the camera optical system group of the fourth embodiment, the first to eighth lenses, counted from the object side, are respectively the first lens E1 to the eighth lens E8, and the first to eighth lenses, counted from the image side, correspond to the eighth lens E8 to the first lens E1, wherein the eighth lens E8 can also be referred to as the last lens.

[0341] The camera optical system assembly of the fourth embodiment performs a focusing process by moving at least one of its lenses. The camera optical system assembly, through the focusing process, has a first shooting state corresponding to an infinity object distance and a second shooting state corresponding to a finite object distance of 9000.000 mm. The first shooting state is the state of the camera optical system assembly when the subject is at infinity (infinity object distance), while the second shooting state is the state of the camera optical system assembly when the subject is at a finite object distance (finite object distance). When the subject moves from infinity to a finite object distance, the camera optical system assembly performs a focusing process to change from the first shooting state to the second shooting state. Conversely, when the subject moves from a finite object distance to infinity, the camera optical system assembly also performs a focusing process to change from the second shooting state to the first shooting state. During the focusing process, the eighth lens E8 of the camera optical system assembly moves along the optical axis.

[0342] The first lens group A1 has positive refractive power, and the second lens group A2 has negative refractive power.

[0343] The first lens E1 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0344] The second lens E2 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0345] The third lens E3 has negative refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0346] The fourth lens E4 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are spherical.

[0347] The fifth lens, E5, has negative refractive power and is made of glass. Its object-side surface is concave near the optical axis, and its image-side surface is also concave near the optical axis. Both surfaces are spherical. The object-side surface of the fifth lens, E5, is bonded to the image-side surface of the fourth lens, E4.

[0348] 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 convex near the optical axis. Both of its surfaces are aspherical.

[0349] The seventh lens, E7, has negative refractive power and is made of glass. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0350] The eighth lens, E8, 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.

[0351] The filter element E10 is made of glass and is located between the eighth lens E8 and the imaging surface IMG. It does not affect the focal length of the camera optical system group.

[0352] In the camera optical system group, the lens with the smallest effective radius among all lenses at the corresponding infinity object distance is the seventh lens, E7.

[0353] The maximum distance between all adjacent lenses in the camera optical system group on the optical axis is located between the seventh lens E7 and the eighth lens E8.

[0354] In the second lens group A2, the third lens E3 is a convex-concave lens. The fourth lens E4, a biconvex positive lens, and the fifth lens E5, a biconcave negative lens, combine to form an achromatic lens group with negative refractive power. The sixth lens E6 is an aspherical lens.

[0355] Please refer to Tables 4A to 4D below.

[0356]

[0357]

[0358]

[0359] The definitions in Table 4B are the same as in the first embodiment, except that D1 is the distance on the optical axis between the aperture stop S1 and the object-side surface of the eighth lens E8, and the finite object distances corresponding to fS, FnoS, and HFOVS are 9000.000 mm. Furthermore, in addition to the first and second shooting states, the camera optical system assembly of this embodiment can also have other focusing states with different focal lengths to correspond to other focusing states with different object distances.

[0360] As can be seen from Tables 4A and 4B, the eighth lens E8 moves along the optical axis during focusing.

[0361]

[0362] The equations for the aspherical surfaces in Table 4C are expressed in the form of the first embodiment.

[0363]

[0364]

[0365] The definitions described in Table 4D are the same as those in the first embodiment.

[0366] <Fifth Embodiment>

[0367] Please refer to Figures 13 to 15 ,in Figure 13 The diagram illustrates the imaging device according to the fifth embodiment of this disclosure in a first shooting state and a second shooting state. Figure 14 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the fifth embodiment in the first shooting state. Figure 15 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the fifth embodiment in the second shooting state. Figure 13 The upper part is a schematic diagram of the camera optical system assembly in the first shooting state, while Figure 13 The lower half is a schematic diagram of the camera optical system assembly in the second shooting state. Figure 13 It is known that the image capturing device 5 includes a camera optical system assembly (unlabeled) and an electronic photosensitive element IS. The camera optical system assembly, along the optical path from the object side to the image side, sequentially includes a first lens E1, a second lens E2, an aperture ST, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, an aperture stop S1, a seventh lens E7, an eighth lens E8, a ninth lens E9, a filter element E10, and an imaging surface IMG. More specifically, the camera optical system assembly, along the optical path from the object side to the image side, has a first lens group A1, an aperture ST, and a second lens group A2, wherein the first lens group A1 includes the first lens E1 and the second lens E2, and the second lens group A2 includes the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the eighth lens E8, and the ninth lens E9. The electronic photosensitive element IS is disposed on the imaging surface IMG. The camera optical system assembly contains nine lenses (E1, E2, E3, E4, E5, E6, E7, E8, E9), and there are no other interposed lenses between the lenses.

[0368] In the camera optical system assembly of the fifth embodiment, the first to ninth lenses, counted from the object side, are respectively the first lens E1 to the ninth lens E9, and the first to ninth lenses, counted from the image side, correspond to the ninth lens E9 to the first lens E1, wherein the ninth lens E9 can also be referred to as the last lens.

[0369] The camera optical system assembly of the fifth embodiment performs a focusing process by moving at least one of its lenses. The camera optical system assembly, through the focusing process, has a first shooting state corresponding to an infinity object distance and a second shooting state corresponding to a finite object distance of 9000.000 mm. The first shooting state is the state of the camera optical system assembly when the subject is at infinity (infinity object distance), while the second shooting state is the state of the camera optical system assembly when the subject is at a finite object distance (finite object distance). When the subject moves from infinity to a finite object distance, the camera optical system assembly performs a focusing process to change from the first shooting state to the second shooting state. Conversely, when the subject moves from a finite object distance to infinity, the camera optical system assembly also performs a focusing process to change from the second shooting state to the first shooting state. During the focusing process, the ninth lens E9 of the camera optical system assembly moves along the optical axis.

[0370] The first lens group A1 has positive refractive power, and the second lens group A2 has negative refractive power.

[0371] The first lens E1 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0372] The second lens E2 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical.

[0373] The third lens E3 has negative refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0374] The fourth lens E4 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are spherical.

[0375] The fifth lens, E5, has negative refractive power and is made of glass. Its object-side surface is concave near the optical axis, and its image-side surface is also concave near the optical axis. Both surfaces are spherical. The object-side surface of the fifth lens, E5, is bonded to the image-side surface of the fourth lens, E4.

[0376] 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.

[0377] The seventh lens, E7, has negative refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0378] The eighth lens, E8, 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.

[0379] The ninth lens, E9, 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.

[0380] The filter element E10 is made of glass and is located between the ninth lens E9 and the imaging surface IMG. It does not affect the focal length of the camera optical system group.

[0381] In the camera optical system group, the lens with the smallest effective radius among all lenses at the corresponding infinity object distance is the seventh lens, E7.

[0382] The maximum distance between all adjacent lenses in the camera optical system group on the optical axis is located between the sixth lens E6 and the seventh lens E7.

[0383] In the second lens group A2, the third lens E3 is a convex-concave lens. The fourth lens E4, a biconvex positive lens, and the fifth lens E5, a biconcave negative lens, combine to form an achromatic lens group with negative refractive power. The sixth lens E6 is an aspherical lens.

[0384] Please refer to Tables 5A to 5D below.

[0385]

[0386]

[0387] The definitions in Table 5B are identical to those in the first embodiment, except that D1 is the distance on the optical axis between the image-side surface of the eighth lens E8 and the object-side surface of the ninth lens E9, D2 is the distance on the optical axis between the image-side surface of the ninth lens E9 and the filter element E10, and the finite object distance corresponding to fS, FnoS, and HFOVS is 9000.000 mm. Furthermore, the camera optical system assembly of this embodiment can also have other focusing states with different focal lengths in addition to the first and second shooting states, to correspond to focusing states with other different object distances.

[0388] As can be seen from Tables 5A and 5B, the ninth lens E9 moves along the optical axis during focusing.

[0389]

[0390] The equations for the aspherical surfaces in Table 5C are represented in the form of the first embodiment.

[0391]

[0392]

[0393] The definitions described in Table 5D are the same as those in the first embodiment.

[0394] <Sixth Embodiment>

[0395] Please refer to Figures 16 to 18 ,in Figure 16 The diagram illustrates the imaging device according to the sixth embodiment of this disclosure in a first shooting state and a second shooting state. Figure 17 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the sixth embodiment in the first shooting state. Figure 18 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the sixth embodiment in the second shooting state. Figure 16 The upper part is a schematic diagram of the camera optical system assembly in the first shooting state, while Figure 16 The lower half is a schematic diagram of the camera optical system assembly in the second shooting state. Figure 16 It is known that the image capturing device 6 includes a camera optical system assembly (unlabeled) and an electronic photosensitive element IS. The camera optical system assembly, along the optical path from the object side to the image side, sequentially includes a first lens E1, a second lens E2, an aperture ST, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an aperture stop S1, an eighth lens E8, a filter element E10, and an imaging surface IMG. More specifically, the camera optical system assembly, along the optical path from the object side to the image side, has a first lens group A1, an aperture ST, and a second lens group A2, wherein the first lens group A1 includes the first lens E1 and the second lens E2, and the second lens group A2 includes the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, and the eighth lens E8. The electronic photosensitive element IS is disposed on the imaging surface IMG. The camera optical system assembly contains eight lenses (E1, E2, E3, E4, E5, E6, E7, E8), and there are no other interposed lenses between each lens.

[0396] In the camera optical system assembly of the sixth embodiment, the first to eighth lenses, counted from the object side, are respectively the first lens E1 to the eighth lens E8, and the first to eighth lenses, counted from the image side, correspond to the eighth lens E8 to the first lens E1, wherein the eighth lens E8 can also be referred to as the last lens.

[0397] The camera optical system assembly of the sixth embodiment performs a focusing process by moving at least one of its lenses. The camera optical system assembly, through the focusing process, has a first shooting state corresponding to an infinity object distance and a second shooting state corresponding to a finite object distance of 10000.000 mm. The first shooting state is the state of the camera optical system assembly when the subject is at infinity (infinity object distance), while the second shooting state is the state of the camera optical system assembly when the subject is at a finite object distance (finite object distance). When the subject moves from infinity to a finite object distance, the camera optical system assembly performs a focusing process to change from the first shooting state to the second shooting state. Conversely, when the subject moves from a finite object distance to infinity, the camera optical system assembly also performs a focusing process to change from the second shooting state to the first shooting state. During the focusing process, the eighth lens E8 of the camera optical system assembly moves along the optical axis.

[0398] The first lens group A1 has positive refractive power, and the second lens group A2 has negative refractive power.

[0399] The first lens E1 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0400] The second lens E2 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0401] The third lens E3 has negative refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0402] The fourth lens E4 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are spherical.

[0403] The fifth lens, E5, has negative refractive power and is made of glass. Its object-side surface is concave near the optical axis, and its image-side surface is also concave near the optical axis. Both surfaces are spherical. The object-side surface of the fifth lens, E5, is bonded to the image-side surface of the fourth lens, E4.

[0404] 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.

[0405] The seventh lens, E7, has negative refractive power and is made of glass. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0406] The eighth lens, E8, 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.

[0407] The filter element E10 is made of glass and is located between the eighth lens E8 and the imaging surface IMG. It does not affect the focal length of the camera optical system group.

[0408] In the camera optical system group, the lens with the smallest effective radius among all lenses at the corresponding infinity object distance is the seventh lens, E7.

[0409] The maximum distance between all adjacent lenses in the camera optical system group on the optical axis is located between the sixth lens E6 and the seventh lens E7.

[0410] In the second lens group A2, the third lens E3 is a convex-concave lens. The fourth lens E4, a biconvex positive lens, and the fifth lens E5, a biconcave negative lens, combine to form an achromatic lens group with negative refractive power. The sixth lens E6 is an aspherical lens.

[0411] Please refer to Tables 6A to 6D below.

[0412]

[0413]

[0414] The definitions in Table 6B are the same as in the first embodiment, except that D1 is the distance on the optical axis between the image-side surface of the seventh lens E7 and the aperture stop S1. Furthermore, in addition to the first and second shooting states, the camera optical system assembly of this embodiment can also have other focusing states with different focal lengths to correspond to focusing states with other different object distances.

[0415] As can be seen from Tables 6A and 6B, the aperture stop S1 and the eighth lens E8 move along the optical axis during the focusing process.

[0416]

[0417] The equations for the aspherical surfaces in Table 6C are expressed in the form of the first embodiment.

[0418]

[0419]

[0420] The definitions described in Table 6D are the same as those in the first embodiment.

[0421] <Seventh Embodiment>

[0422] Please refer to Figures 19 to 21 ,in Figure 19The diagram illustrates the imaging device according to the seventh embodiment of this disclosure in a first shooting state and a second shooting state. Figure 20 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the seventh embodiment in the first shooting state. Figure 21 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the seventh embodiment in the second shooting state. Figure 19 The upper part is a schematic diagram of the camera optical system assembly in the first shooting state, while Figure 19 The lower half is a schematic diagram of the camera optical system assembly in the second shooting state. Figure 19 It is known that the image capturing device 7 includes a camera optical system assembly (unlabeled) and an electronic photosensitive element IS. The camera optical system assembly, along the optical path from the object side to the image side, sequentially includes a first lens E1, a second lens E2, an aperture ST, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an aperture stop S1, an eighth lens E8, a filter element E10, and an imaging surface IMG. More specifically, the camera optical system assembly, along the optical path from the object side to the image side, has a first lens group A1, an aperture ST, and a second lens group A2, wherein the first lens group A1 includes the first lens E1 and the second lens E2, and the second lens group A2 includes the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, and the eighth lens E8. The electronic photosensitive element IS is disposed on the imaging surface IMG. The camera optical system assembly contains eight lenses (E1, E2, E3, E4, E5, E6, E7, E8), and there are no other interposed lenses between each lens.

[0423] In the camera optical system assembly of the seventh embodiment, the first to eighth lenses, counted from the object side, are respectively the first lens E1 to the eighth lens E8, and the first to eighth lenses, counted from the image side, correspond to the eighth lens E8 to the first lens E1, wherein the eighth lens E8 can also be referred to as the last lens.

[0424] The camera optical system assembly of the seventh embodiment performs a focusing process by moving at least one of its lenses. Through the focusing process, the camera optical system assembly has a first shooting state corresponding to an infinity object distance and a second shooting state corresponding to a finite object distance of 12000.000 mm. The first shooting state is the state of the camera optical system assembly when the subject is at infinity (infinity object distance), while the second shooting state is the state of the camera optical system assembly when the subject is at a finite object distance (finite object distance). When the subject moves from infinity to a finite object distance, the camera optical system assembly performs a focusing process to change from the first shooting state to the second shooting state. Conversely, when the subject moves from a finite object distance to infinity, the camera optical system assembly also performs a focusing process to change from the second shooting state to the first shooting state. During the focusing process, the seventh lens E7 and the eighth lens E8 of the camera optical system assembly move along the optical axis.

[0425] The first lens group A1 has positive refractive power, and the second lens group A2 has negative refractive power.

[0426] The first lens E1 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0427] The second lens E2 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0428] The third lens E3 has negative refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0429] The fourth lens E4 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are spherical.

[0430] The fifth lens, E5, has negative refractive power and is made of glass. Its object-side surface is concave near the optical axis, and its image-side surface is also concave near the optical axis. Both surfaces are spherical. The object-side surface of the fifth lens, E5, is bonded to the image-side surface of the fourth lens, E4.

[0431] 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.

[0432] The seventh lens, E7, has negative refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0433] The eighth lens, E8, 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.

[0434] The filter element E10 is made of glass and is located between the eighth lens E8 and the imaging surface IMG. It does not affect the focal length of the camera optical system group.

[0435] In the camera optical system group, the lens with the smallest effective radius among all lenses at the corresponding infinity object distance is the seventh lens, E7.

[0436] The maximum distance between all adjacent lenses in the camera optical system group on the optical axis is located between the sixth lens E6 and the seventh lens E7.

[0437] In the second lens group A2, the third lens E3 is a convex-concave lens. The fourth lens E4, a biconvex positive lens, and the fifth lens E5, a biconcave negative lens, combine to form an achromatic lens group with negative refractive power. The sixth lens E6 is an aspherical lens.

[0438] Please refer to Tables 7A to 7D below.

[0439]

[0440]

[0441]

[0442] The definitions in Table 7B are the same as in the first embodiment, except that D1 is the distance on the optical axis between the image-side surface of the sixth lens E6 and the object-side surface of the seventh lens E7, and the finite object distances corresponding to fS, FnoS, and HFOVS are 12000.000 mm. Furthermore, in addition to the first and second shooting states, the camera optical system assembly of this embodiment can also have other focusing states with different focal lengths to correspond to other focusing states with different object distances.

[0443] As can be seen from Tables 7A and 7B, the seventh lens E7, the aperture S1, and the eighth lens E8 move along the optical axis during the focusing process.

[0444]

[0445] The equations for the aspherical surfaces in Table 7C are expressed in the form of the first embodiment.

[0446]

[0447] The definitions described in Table 7D are the same as those in the first embodiment.

[0448] <Eighth Embodiment>

[0449] Please refer to Figures 22 to 24 ,in Figure 22 The diagram illustrates the imaging device according to the eighth embodiment of this disclosure in a first shooting state and a second shooting state. Figure 23 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the eighth embodiment in the first shooting state. Figure 24 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the eighth embodiment in the second shooting state. Figure 22 The upper part is a schematic diagram of the camera optical system assembly in the first shooting state, while Figure 22 The lower half is a schematic diagram of the camera optical system assembly in the second shooting state. Figure 22 It is known that the image capturing device 8 includes a camera optical system assembly (unlabeled) and an electronic photosensitive element IS. The camera optical system assembly, along the optical path from the object side to the image side, sequentially includes a first lens E1, a second lens E2, an aperture ST, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an aperture stop S1, an eighth lens E8, a filter element E10, and an imaging surface IMG. More specifically, the camera optical system assembly, along the optical path from the object side to the image side, has a first lens group A1, an aperture ST, and a second lens group A2, wherein the first lens group A1 includes the first lens E1 and the second lens E2, and the second lens group A2 includes the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, and the eighth lens E8. The electronic photosensitive element IS is disposed on the imaging surface IMG. The camera optical system assembly contains eight lenses (E1, E2, E3, E4, E5, E6, E7, E8), and there are no other interposed lenses between each lens.

[0450] In the camera optical system group of the eighth embodiment, the first to eighth lenses, counted from the object side, are respectively the first lens E1 to the eighth lens E8, and the first to eighth lenses, counted from the image side, correspond to the eighth lens E8 to the first lens E1, wherein the eighth lens E8 can also be referred to as the last lens.

[0451] The camera optical system assembly of the eighth embodiment performs a focusing process by moving at least one of its lenses. The camera optical system assembly, through the focusing process, has a first shooting state corresponding to an infinity object distance and a second shooting state corresponding to a finite object distance of 10000.000 mm. The first shooting state is the state of the camera optical system assembly when the subject is at infinity (infinity object distance), while the second shooting state is the state of the camera optical system assembly when the subject is at a finite object distance (finite object distance). When the subject moves from infinity to a finite object distance, the camera optical system assembly performs a focusing process to change from the first shooting state to the second shooting state. Conversely, when the subject moves from a finite object distance to infinity, the camera optical system assembly also performs a focusing process to change from the second shooting state to the first shooting state. During the focusing process, the eighth lens E8 of the camera optical system assembly moves along the optical axis.

[0452] The first lens group A1 has positive refractive power, and the second lens group A2 has negative refractive power.

[0453] The first lens E1 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0454] The second lens E2 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0455] The third lens E3 has negative refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0456] The fourth lens E4 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are spherical.

[0457] The fifth lens, E5, has negative refractive power and is made of glass. Its object-side surface is concave near the optical axis, and its image-side surface is also concave near the optical axis. Both surfaces are spherical. The object-side surface of the fifth lens, E5, is bonded to the image-side surface of the fourth lens, E4.

[0458] 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.

[0459] The seventh lens, E7, has negative refractive power and is made of glass. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0460] The eighth lens, E8, 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.

[0461] The filter element E10 is made of glass and is located between the eighth lens E8 and the imaging surface IMG. It does not affect the focal length of the camera optical system group.

[0462] In the camera optical system group, the lens with the smallest effective radius among all lenses at the corresponding infinity object distance is the seventh lens, E7.

[0463] The maximum distance between all adjacent lenses in the camera optical system group on the optical axis is located between the sixth lens E6 and the seventh lens E7.

[0464] In the second lens group A2, the third lens E3 is a convex-concave lens. The fourth lens E4, a biconvex positive lens, and the fifth lens E5, a biconcave negative lens, combine to form an achromatic lens group with negative refractive power. The sixth lens E6 is an aspherical lens.

[0465] Please refer to Tables 8A to 8D below.

[0466]

[0467]

[0468]

[0469] The definitions in Table 8B are the same as in the first embodiment, except that D1 is the distance on the optical axis between the image-side surface of the seventh lens E7 and the aperture stop S1. Furthermore, in addition to the first and second shooting states, the camera optical system assembly of this embodiment can also have other focusing states with different focal lengths to correspond to other focusing states with different object distances.

[0470] As can be seen from Tables 8A and 8B, the aperture stop S1 and the eighth lens E8 move along the optical axis during the focusing process.

[0471]

[0472]

[0473] The equations for the aspherical surfaces in Table 8C are expressed in the form of the first embodiment.

[0474]

[0475] The definitions described in Table 8D are the same as those in the first embodiment.

[0476] <Ninth Embodiment>

[0477] Please refer to Figures 25 to 27 ,in Figure 25 The diagram illustrates the imaging device according to the ninth embodiment of this disclosure in a first shooting state and a second shooting state. Figure 26 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the ninth embodiment in the first shooting state. Figure 27 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the ninth embodiment in the second shooting state. Figure 25 The upper part is a schematic diagram of the camera optical system assembly in the first shooting state, while Figure 25 The lower half is a schematic diagram of the camera optical system assembly in the second shooting state. Figure 25 It is known that the image capturing device 9 includes a camera optical system assembly (unlabeled) and an electronic photosensitive element IS. The camera optical system assembly, along the optical path from the object side to the image side, sequentially includes a first lens E1, a second lens E2, an aperture ST, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, an aperture stop S1, a seventh lens E7, an eighth lens E8, a filter element E10, and an imaging surface IMG. More specifically, the camera optical system assembly, along the optical path from the object side to the image side, has a first lens group A1, an aperture ST, and a second lens group A2, wherein the first lens group A1 includes the first lens E1 and the second lens E2, and the second lens group A2 includes the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, and the eighth lens E8. The electronic photosensitive element IS is disposed on the imaging surface IMG. The camera optical system assembly contains eight lenses (E1, E2, E3, E4, E5, E6, E7, E8), and there are no other interposed lenses between each lens.

[0478] In the camera optical system assembly of the ninth embodiment, the first to eighth lenses, counted from the object side, are respectively the first lens E1 to the eighth lens E8, and the first to eighth lenses, counted from the image side, correspond to the eighth lens E8 to the first lens E1, wherein the eighth lens E8 can also be referred to as the last lens.

[0479] The camera optical system assembly of the ninth embodiment performs a focusing process by moving at least one of its lenses. The camera optical system assembly, through the focusing process, has a first shooting state corresponding to an infinity object distance and a second shooting state corresponding to a finite object distance of 10000.000 mm. The first shooting state is the state of the camera optical system assembly when the subject is at infinity (infinity object distance), while the second shooting state is the state of the camera optical system assembly when the subject is at a finite object distance (finite object distance). When the subject moves from infinity to a finite object distance, the camera optical system assembly performs a focusing process to change from the first shooting state to the second shooting state. Conversely, when the subject moves from a finite object distance to infinity, the camera optical system assembly also performs a focusing process to change from the second shooting state to the first shooting state. During the focusing process, the eighth lens E8 of the camera optical system assembly moves along the optical axis.

[0480] The first lens group A1 has positive refractive power, and the second lens group A2 has negative refractive power.

[0481] The first lens E1 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0482] The second lens E2 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0483] The third lens E3 has negative refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0484] The fourth lens E4 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical.

[0485] The fifth lens, E5, has negative refractive power and is made of glass. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0486] 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.

[0487] The seventh lens, E7, has negative refractive power and is made of glass. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are spherical.

[0488] The eighth lens, E8, 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.

[0489] The filter element E10 is made of glass and is located between the eighth lens E8 and the imaging surface IMG. It does not affect the focal length of the camera optical system group.

[0490] In the camera optical system group, the lens with the smallest effective radius among all lenses at the corresponding infinity object distance is the seventh lens, E7.

[0491] The maximum distance between all adjacent lenses in the camera optical system group on the optical axis is located between the sixth lens E6 and the seventh lens E7.

[0492] In the second lens group A2, the third lens E3 is a convex-concave lens. The fourth lens E4, a biconvex positive lens, and the fifth lens E5, a biconcave negative lens, combine to form an achromatic lens group with negative refractive power. The sixth lens E6 is an aspherical lens.

[0493] Please refer to Tables 9A to 9D below.

[0494]

[0495]

[0496]

[0497] The definitions described in Table 9B are the same as those in the first embodiment. Furthermore, in addition to the first and second shooting states, the camera optical system assembly of this embodiment may also have other focusing states with different focal lengths to correspond to focusing states with other different object distances.

[0498] As can be seen from Tables 9A and 9B, the eighth lens E8 moves along the optical axis during focusing.

[0499]

[0500]

[0501] The equations for the aspherical curves in Table 9C are expressed in the form of the first embodiment.

[0502]

[0503] The definitions described in Table 9D are the same as those in the first embodiment.

[0504] <Tenth Embodiment>

[0505] Please refer to Figures 28 to 30 ,in Figure 28The diagram illustrates the imaging device according to the tenth embodiment of this disclosure in a first shooting state and a second shooting state. Figure 29 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the tenth embodiment in the first shooting state. Figure 30 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the tenth embodiment in the second shooting state. Figure 28 The upper part is a schematic diagram of the camera optical system assembly in the first shooting state, while Figure 28 The lower half is a schematic diagram of the camera optical system assembly in the second shooting state. Figure 28 It is understood that the image capturing device 10 includes a camera optical system assembly (not otherwise labeled) and an electronic photosensitive element IS. The camera optical system assembly, along the optical path from the object side to the image side, sequentially includes a first lens E1, a second lens E2, a third lens E3, an aperture ST, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an aperture stop S1, an eighth lens E8, a ninth lens E9, a filter element E10, and an imaging surface IMG. More specifically, the camera optical system assembly, along the optical path from the object side to the image side, has a first lens group A1, an aperture ST, and a second lens group A2, wherein the first lens group A1 includes the first lens E1, the second lens E2, and the third lens E3, and the second lens group A2 includes the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the eighth lens E8, and the ninth lens E9. The electronic photosensitive element IS is disposed on the imaging surface IMG. The camera optical system assembly contains nine lenses (E1, E2, E3, E4, E5, E6, E7, E8, E9), and there are no other interposed lenses between the lenses.

[0506] In the camera optical system assembly of the tenth embodiment, the first to ninth lenses, counted from the object side, are respectively the first lens E1 to the ninth lens E9, and the first to ninth lenses, counted from the image side, correspond to the ninth lens E9 to the first lens E1, wherein the ninth lens E9 can also be referred to as the last lens.

[0507] The camera optical system assembly of the tenth embodiment performs a focusing process by moving at least one of its lenses. The camera optical system assembly, through the focusing process, has a first shooting state corresponding to an infinity object distance and a second shooting state corresponding to a finite object distance of 8000.000 mm. The first shooting state is the state of the camera optical system assembly when the subject is at infinity (infinity object distance), while the second shooting state is the state of the camera optical system assembly when the subject is at a finite object distance (finite object distance). When the subject moves from infinity to a finite object distance, the camera optical system assembly performs a focusing process to change from the first shooting state to the second shooting state. Conversely, when the subject moves from a finite object distance to infinity, the camera optical system assembly also performs a focusing process to change from the second shooting state to the first shooting state. During the focusing process, the fourth lens E4, the fifth lens E5, the sixth lens E6, and the seventh lens E7 of the camera optical system assembly move along the optical axis.

[0508] The first lens group A1 has positive refractive power, and the second lens group A2 has negative refractive power.

[0509] The first lens E1 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are spherical.

[0510] The second lens E2 has negative refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0511] The third lens E3 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0512] The fourth lens E4 has negative refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0513] The fifth lens, E5, has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are spherical.

[0514] The sixth lens, E6, has negative refractive power and is made of glass. Its object-side surface is concave near the optical axis, and its image-side surface is also concave near the optical axis. Both surfaces are spherical. The object-side surface of the sixth lens, E6, is bonded to the image-side surface of the fifth lens, E5.

[0515] 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.

[0516] The eighth lens, E8, has negative refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical.

[0517] The ninth lens, E9, 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.

[0518] The filter element E10 is made of glass and is located between the ninth lens E9 and the imaging surface IMG. It does not affect the focal length of the camera optical system group.

[0519] The lens with the smallest effective radius among all lenses in the camera optical system group at the corresponding infinity object distance is the eighth lens, E8.

[0520] The maximum distance between all adjacent lenses in the camera optical system group on the optical axis is located between the seventh lens E7 and the eighth lens E8 or between the eighth lens E8 and the ninth lens E9.

[0521] In the second lens group A2, the fourth lens E4 is a convex-concave lens. The fifth lens E5, a biconvex positive lens, and the sixth lens E6, a biconcave negative lens, combine to form an achromatic lens group with negative refractive power. The seventh lens E7 is an aspherical lens.

[0522] Please refer to Tables 10A to 10D below.

[0523]

[0524]

[0525]

[0526] The definitions in Table 10B are identical to those in the first embodiment, except that D1 is the distance on the optical axis between the aperture ST and the object-side surface of the fourth lens E4, D2 is the distance on the optical axis between the image-side surface of the seventh lens E7 and the stop S1, and the finite object distances corresponding to fS, FnoS, and HFOVS are 8000.000 mm. Furthermore, in addition to the first and second shooting states, the camera optical system assembly of this embodiment can also have other focusing states with different focal lengths to correspond to other focusing states with different object distances.

[0527] As can be seen from Tables 10A and 10B, the fourth lens E4, the fifth lens E5, the sixth lens E6, and the seventh lens E7 move along the optical axis during focusing.

[0528]

[0529]

[0530] The equations for the aspherical surfaces in Table 10C are represented as in the first embodiment.

[0531]

[0532]

[0533] The definitions described in Table 10D are the same as those in the first embodiment.

[0534] <Eleventh Embodiment>

[0535] Please refer to Figures 31 to 33 ,in Figure 31 The diagram illustrates the imaging device according to the eleventh embodiment of this disclosure in a first shooting state and a second shooting state. Figure 32 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the eleventh embodiment in the first shooting state. Figure 33 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the eleventh embodiment in the second shooting state. Figure 31 The upper part is a schematic diagram of the camera optical system assembly in the first shooting state, while Figure 31 The lower half is a schematic diagram of the camera optical system assembly in the second shooting state. Figure 31 It is understood that the image capturing device 11 includes a camera optical system assembly (not otherwise labeled) and an electronic photosensitive element IS. The camera optical system assembly, along the optical path from the object side to the image side, sequentially includes a first lens E1, a second lens E2, an aperture ST, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, an aperture stop S1, a seventh lens E7, an eighth lens E8, a filter element E10, and an imaging surface IMG. More specifically, the camera optical system assembly, along the optical path from the object side to the image side, has a first lens group A1, an aperture ST, and a second lens group A2, wherein the first lens group A1 includes the first lens E1 and the second lens E2, and the second lens group A2 includes the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, and the eighth lens E8. The electronic photosensitive element IS is disposed on the imaging surface IMG. The camera optical system assembly contains eight lenses (E1, E2, E3, E4, E5, E6, E7, E8), and there are no other interposed lenses between each lens.

[0536] In the camera optical system assembly of the eleventh embodiment, the first to eighth lenses, counted from the object side, are respectively the first lens E1 to the eighth lens E8, and the first to eighth lenses, counted from the image side, correspond to the eighth lens E8 to the first lens E1, wherein the eighth lens E8 can also be referred to as the last lens.

[0537] The camera optical system assembly of the eleventh embodiment performs a focusing process by moving at least one of its lenses. The camera optical system assembly, through the focusing process, has a first shooting state corresponding to an infinity object distance and a second shooting state corresponding to a finite object distance of 10000.000 mm. The first shooting state is the state of the camera optical system assembly when the subject is at infinity (infinity object distance), while the second shooting state is the state of the camera optical system assembly when the subject is at a finite object distance (finite object distance). When the subject moves from infinity to a finite object distance, the camera optical system assembly performs a focusing process to change from the first shooting state to the second shooting state. Conversely, when the subject moves from a finite object distance to infinity, the camera optical system assembly also performs a focusing process to change from the second shooting state to the first shooting state. During the focusing process, the eighth lens E8 of the camera optical system assembly moves along the optical axis.

[0538] The first lens group A1 has positive refractive power, and the second lens group A2 has negative refractive power.

[0539] The first lens E1 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0540] The second lens E2 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0541] 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 concave near the optical axis. Both of its surfaces are aspherical.

[0542] The fourth lens E4 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical.

[0543] The fifth lens, E5, has negative refractive power and is made of glass. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0544] 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.

[0545] The seventh lens, E7, has negative refractive power and is made of glass. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are spherical.

[0546] The eighth lens, E8, 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.

[0547] The filter element E10 is made of glass and is located between the eighth lens E8 and the imaging surface IMG. It does not affect the focal length of the camera optical system group.

[0548] In the camera optical system group, the lens with the smallest effective radius among all lenses at the corresponding infinity object distance is the seventh lens, E7.

[0549] The maximum distance between all adjacent lenses in the camera optical system group on the optical axis is located between the sixth lens E6 and the seventh lens E7.

[0550] In the second lens group A2, the third lens E3 is a convex-concave lens. The fourth lens E4, a biconvex positive lens, and the fifth lens E5, a biconcave negative lens, combine to form an achromatic lens group with negative refractive power. The sixth lens E6 is an aspherical lens.

[0551] Please refer to Tables 11A to 11D below.

[0552]

[0553]

[0554]

[0555] The definitions described in Table 11B are the same as those in the first embodiment. Furthermore, in addition to the first and second shooting states, the camera optical system assembly of this embodiment may also have other focusing states with different focal lengths to correspond to focusing states with other different object distances.

[0556] As can be seen from Tables 11A and 11B, the eighth lens E8 moves along the optical axis during focusing.

[0557]

[0558] The equations for the aspherical surfaces in Table 11C are represented in the form of the first embodiment.

[0559]

[0560]

[0561] The definitions described in Table 11D are the same as those in the first embodiment.

[0562] <Twelfth Embodiment>

[0563] Please refer to Figure 34This is a perspective view illustrating an image-capturing device according to the twelfth embodiment of this disclosure. 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 imaging optical system group of the first embodiment described above, a lens barrel (not otherwise labeled) for supporting the imaging optical system group, and a support device (Holder Member, not otherwise labeled). The imaging lens 101 can also be configured with the imaging optical system group of other embodiments described above, and this disclosure 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.

[0564] The driving device 102 may have internal focusing or auto-focusing functions. Its driving method can utilize, but is not limited to, driving systems such as stepping motors, piezo motors, screws, voice coil motors (VCMs), spring-type, ball-type, microelectromechanical systems (MEMS), piezoelectric systems, and shape memory alloys. The driving device 102 allows the imaging lens 101 to achieve a better imaging position, enabling clear images of the subject at different object distances. Furthermore, movable elements in the image capturing device 100 (such as movable optical elements or electronic photosensitive elements in the lens group, but not limited to these) can also be driven by the driving device 102, thus allowing the movable elements to move horizontally, tilted, or perpendicular to the optical axis. However, this disclosure is not limited to the driving methods disclosed. In addition, the imaging device 100 is equipped with an electronic image sensor 103 (such as CMOS or CCD) with high sensitivity and low noise, which is placed on the imaging surface of the camera optical system assembly, so as to truly present the good imaging quality of the camera optical system assembly.

[0565] 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. This OIS compensates for image blur caused by camera shake during shooting by adjusting the changes in different axes of the imaging lens 101, or utilizes image compensation technology in the imaging software to provide electronic image stabilization (EIS), further improving image quality in dynamic and low-light scenes. Furthermore, some components in the image capturing device 100 can also be driven by the drive unit 102 to compensate for image tilt in real time, thus achieving the same optical image stabilization function.

[0566] <Thirteenth Embodiment>

[0567] Please refer to Figures 35 to 36 ,in Figure 35 A perspective view of one side of an electronic device according to the thirteenth embodiment of this disclosure is shown, and Figure 36 Draw Figure 35 A three-dimensional diagram of the other side of the electronic device.

[0568] 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 twelfth embodiment. Figure 35 As shown, image capturing devices 100, 100a, and 100b are all disposed on the same side of the electronic device 200. Figure 36 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 this disclosure is not limited thereto. Furthermore, the image capturing devices 100a, 100b, and 100c can all include the camera optical system assembly disclosed herein 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, and each can include a reflective element as an element for deflecting the light path. Among them, the imaging lens of each of the image capturing devices 100a, 100b, and 100c can include, for example, an optical lens group of the camera optical system assembly disclosed herein, a lens barrel for supporting the optical lens group, and a support device.

[0569] Image capturing device 100 is a telephoto image capturing device, image capturing device 100a is a wide-angle 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 36 As shown, the opening of the image capturing device 100c can be non-circular, and the lens barrel or lens inside the image capturing device 100c can have a chamfered edge at its outer diameter to accommodate the non-circular opening. This allows for a further reduction in the single-axis length of the image capturing device 100c, which helps to reduce the lens volume, increase the area ratio of the display module 201 relative to the electronic device 200, and reduce the thickness of the electronic device 200, further achieving module miniaturization. The aforementioned electronic device 200 is exemplified by including multiple image capturing devices 100, 100a, 100b, and 100c, but the number and configuration of the image capturing devices are not intended to limit this disclosure.

[0570] <Fourteenth Embodiment>

[0571] Please refer to Figures 37 to 39 ,in Figure 37 A perspective view of one side of an electronic device according to the fourteenth embodiment of this disclosure is shown. Figure 38 Draw Figure 37 A three-dimensional diagram of the other side of the electronic device, and Figure 39 Draw Figure 37 System block diagram of an electronic device.

[0572] In this embodiment, the electronic device 300 is a smartphone. The electronic device 300 includes, according to the twelfth embodiment, image capturing devices 100, 100d, 100e, 100f, 100g, and 100h, 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, 100d, and 100e are all 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 this disclosure is not limited thereto. Image capturing devices 100f, 100g, 100h, and 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 100f, 100g, and 100h to function as front-facing cameras for selfies; however, this disclosure is not limited to this. Furthermore, image capturing devices 100d, 100e, 100f, 100g, and 100h can all include the camera optical system assembly disclosed herein and can all have a structural configuration similar to that of image capturing device 100. Specifically, each of image capturing devices 100d, 100e, 100f, 100g, and 100h can include an imaging lens, a driving device, an electronic photosensitive element, and an image stabilization module, and each can include a reflective element as a component for deflecting the light path. The imaging lenses of imaging devices 100d, 100e, 100f, 100g, and 100h may each include, for example, an optical lens group of the camera optical system group disclosed herein, a lens barrel for carrying the optical lens group, and a support device.

[0573] Image capturing device 100 is a telescopic image capturing device, image capturing device 100d is a wide-angle image capturing device, image capturing device 100e is an ultra-wide-angle image capturing device, image capturing device 100f is a wide-angle image capturing device, image capturing device 100g is an ultra-wide-angle image capturing device, and image capturing device 100h is a time-of-flight ranging image capturing device. In this embodiment, image capturing devices 100, 100d, and 100e have different viewing angles, allowing the electronic device 300 to provide different magnifications to achieve optical zoom shooting effects. Furthermore, image capturing device 100 is a telescopic image capturing device with a light path deflection element configuration such as a reflective element, so that the total length of image capturing device 100 is not limited by the thickness of the electronic device 300. The light path deflection element configuration of image capturing device 100, such as a reflective element, can have, for example, similar to... Figures 44 to 48 The structure can be referred to the aforementioned corresponding structure. Figures 44 to 48The explanation will not be repeated here. In addition, the imaging device 100h can acquire the depth information of the image. The above-described electronic device 300 is an example that includes multiple imaging devices 100, 100d, 100e, 100f, 100g, and 100h, but the number and configuration of the imaging devices are not intended to limit this disclosure.

[0574] When the user photographs the subject 306, the electronic device 300 uses the image capturing device 100, image capturing device 100d, or image capturing device 100e to focus the light and activates the flash module 301 for supplemental lighting. It then uses the subject distance information provided by the focus assist module 302 for rapid focusing. The image signal processor 303 further optimizes the image to improve the image quality produced by the camera optical system. The focus assist module 302 can use an infrared or laser focus assist system to achieve rapid focusing. Alternatively, the electronic device 300 can also use the image capturing device 100f, image capturing device 100g, or image capturing device 100h for shooting. The display module 304 can use a touchscreen and utilize the diverse functions of the image software processor 305 for image capturing and processing (or a physical shooting button can be used). The image processed by the image software processor 305 can be displayed on the display module 304.

[0575] <Fifteenth Embodiment>

[0576] Please refer to Figure 40 This is a perspective view illustrating one side of an electronic device according to the fifteenth embodiment of this disclosure.

[0577] In this embodiment, the electronic device 400 is a smartphone. The electronic device 400 includes, according to the twelfth embodiment, image capturing devices 100i, 100j, 100k, 100m, 100n, 100p, 100q, and 100r, a flash module 401, a focus assist module, an image signal processor, a display module, and an image software processor (not shown). Image capturing devices 100i, 100j, 100k, 100m, 100n, 100p, 100q, and 100r are all located on the same side of the electronic device 400, while the display module is located on the other side of the electronic device 400. Furthermore, the imaging devices 100i, 100j, 100k, 100m, 100n, 100p, 100q, and 100r may all include the camera optical system group disclosed herein and may all have a structural configuration similar to that of the imaging device 100, which will not be described in detail here.

[0578] Image capturing device 100 is a telephoto image capturing device, image capturing device 100i is a telephoto image capturing device, image capturing device 100j is a wide-angle image capturing device, image capturing device 100k is a wide-angle image capturing device, image capturing device 100m is an ultra-wide-angle image capturing device, image capturing device 100n is an ultra-wide-angle image capturing device, image capturing device 100p is a telephoto image capturing device, image capturing device 100q is a telephoto image capturing device, and image capturing device 100r is a time-of-flight ranging image capturing device. In this embodiment, image capturing devices 100, 100i, 100j, 100k, 100m, 100n, 100p, and 100q have different viewing angles, allowing the electronic device 400 to provide different magnifications to achieve an optical zoom shooting effect. Furthermore, the image capturing device 100 and the image capturing device 100i are telescopic image capturing devices configured with an optical path deflection element, such as a reflective element. The optical path deflection element configuration of the image capturing device 100 and the image capturing device 100i may, for example, have a similar... Figures 44 to 48 The structure can be referred to the aforementioned corresponding structure. Figures 44 to 48 The description of the image acquisition device 100r will not be repeated here. Additionally, the image acquisition device 100r can acquire depth information of the image. The electronic device 400 described above is exemplified by including multiple image acquisition devices 100, 100i, 100j, 100k, 100m, 100n, 100p, 100q, and 100r, but the number and configuration of the image acquisition devices are not intended to limit this disclosure. When a user photographs a subject, the electronic device 400 uses image acquisition devices 100, 100i, 100j, 100k, 100m, 100n, 100p, 100q, or 100r to focus light and capture an image, activates the flash module 401 for supplemental lighting, and performs subsequent processing in a manner similar to the aforementioned embodiments, which will not be repeated here.

[0579] <Sixteenth Embodiment>

[0580] Please refer to Figure 41 This is a schematic diagram illustrating an electronic device according to the sixteenth embodiment of this disclosure.

[0581] In this embodiment, the electronic device 500 is a lightweight unmanned aerial vehicle, such as a drone. The electronic device 500 includes an image-capturing device 501. The image-capturing device 501 includes the camera optical system assembly described in the first embodiment. The image-capturing device 501 can be a telescopic image-capturing device. Similar to the image-capturing device 100, the image-capturing device 501 may further include a lens barrel, a support device, or a combination thereof. The electronic device 500 utilizes the image-capturing device 501 to perform functions such as taking pictures. Preferably, the electronic device may further include a control unit, a display unit, a storage unit, random access memory (RAM), or a combination thereof.

[0582] The image capturing device disclosed herein is not limited to applications in smartphones, mobile vehicles, or unmanned aerial vehicles. It can also be applied to mobile focusing systems as needed, offering excellent aberration correction and good image quality. For example, the image capturing device can be used in a wide range of electronic devices, including handheld telescopes, 3D image capture, digital cameras, mobile devices, tablet computers, smart TVs, network monitoring equipment, dashcams, reversing cameras, multi-lens systems, recognition systems, motion-sensing game consoles, and wearable devices. The aforementioned electronic devices are merely illustrative examples of practical applications of this disclosure and do not limit the scope of application of the image capturing device disclosed herein.

[0583] Although this disclosure is presented above with reference to the preferred embodiments described above, it is not intended to limit this disclosure. Any person skilled in the art may make some modifications and refinements without departing from the spirit and scope of this disclosure. Therefore, the scope of patent protection of this disclosure shall be determined by the claims appended to this specification.

Claims

1. An image pickup optical system group characterized by comprising: It sequentially includes a first lens group, an aperture, and a second lens group along the optical path from an object side to an image side, and all lenses of the imaging optical system group respectively have an object side surface facing the object side direction and an image side surface facing the image side direction; Among them, the total number of lenses in the first lens group is one to three, the total number of lenses in the second lens group is five to eight, and there are no other interpolated lenses between the first lens group and the second lens group; Among them, the first lens group includes a first lens closest to the object side, the second lens group includes a last lens closest to the image side, and the imaging optical system group further sequentially includes a second lens, a third lens, a fourth lens, and a fifth lens between the first lens and the last lens along the optical path, and there are no other interpolated lenses between the first lens and the fifth lens; Among them, the first lens group has a positive refractive power, and the second lens group has a negative refractive power; Among them, the object side surface of the first lens is convex near the optical axis, the object side surface of the second lens is convex near the optical axis, the object side surface of the third lens is convex near the optical axis, the image side surface of the third lens is concave near the optical axis, and at least one of the fifth lens and the sixth lens counted from the object side in the imaging optical system group is a negative lens; Among them, when the imaging optical system group corresponds to an infinite object distance, the total focal length is fL, the focal length of the i-th lens counted from the object side in the imaging optical system group is fi, the minimum value of fL / fi is MIN(fL / fi), the radius of curvature of the object side surface of the third lens is R5, the radius of curvature of the image side surface of the third lens is R6, the maximum value of the spacing distance on the optical axis between all adjacent lenses of the imaging optical system group when corresponding to an infinite object distance is ATLmax, and the maximum imaging height of the imaging optical system group is ImgH, which satisfies the following conditions: -13.80 < MIN(fL / fi) < -3.80, where i is a positive integer and 1 ≤ i ≤ the total number of lenses in the imaging optical system group; 0 < (R5 + R6) / fL < 3.50; and 1.00 < ATLmax / ImgH < 6.

00.

2. The camera optical system group according to claim 1, characterized by The first lens has a positive refractive power, all lenses of the imaging optical system group include at least two glass lenses and at least one plastic lens, and the maximum spacing distance on the optical axis between all adjacent lenses of the imaging optical system group is located in the second lens group.

3. The camera optical system group according to claim 1, wherein At least two adjacent lenses in the second lens group are adhered to each other; Among them, when the imaging optical system group corresponds to an infinite object distance, the total focal length is fL, the entrance pupil diameter of the imaging optical system group is EPD, the combined focal length of the first lens and the second lens is f12, and the combined focal length of the second lens and the third lens is f23, which satisfies the following conditions: 1.40 < fL / EPD < 3.50; and -0.25 < f12 / f23 < 2.

40.

4. The camera optical system group according to claim 1, wherein The radius of curvature of the object-side surface of the first lens is R1, the radius of curvature of the object-side surface of the second lens is R3, the total focal length of the imaging optical system group corresponding to an infinite object distance is fL, the focal length of the fifth lens is f5, the focal length of the sixth lens counted from the object side in the imaging optical system group is f6, and the minimum value of fL / f5 and fL / f6 is MIN(fL / f5, fL / f6), which satisfies the following conditions: -0.50 < (R1 - R3) / (R1 + R3) < 0.70; and -11.20 < MIN(fL / f5, fL / f6) < -2.

00.

5. The camera optical system group according to claim 1, wherein The thickness of the first lens on the optical axis is CT1, the thickness of the second lens counted from the image side in the imaging optical system group on the optical axis is CTlast2, the radius of curvature of the object-side surface of the third lens is R5, the radius of curvature of the image-side surface of the third lens is R6, the total focal length of the imaging optical system group corresponding to an infinite object distance is fL, which satisfies the following conditions: 0.03 < CTlast2 / CT1 < 0.80; and 0.20 < (R5 + R6) / fL < 1.

20.

6. The camera optical system group according to claim 1, wherein The total focal length of the imaging optical system group corresponding to an infinite object distance is fL, and the distance from the object-side surface of the first lens to an imaging plane on the optical axis is TL, which satisfies the following conditions: 1.15 < fL / TL < 2.

00.

7. The camera optical system group according to claim 1, wherein All the lenses of the imaging optical system group include at least one spherical lens and at least one aspherical lens, and the imaging optical system group focuses by moving at least one of its lenses; Among them, the total focal length of the imaging optical system group corresponding to an infinite object distance is fL, the focal length of the i-th lens counted from the object side in the imaging optical system group is fi, and the minimum value of fL / fi is MIN(fL / fi), which satisfies the following conditions: -11.70 < MIN(fL / fi) < -5.00, where i is a positive integer and 1 ≤ i ≤ the total number of lenses in the imaging optical system group.

8. The camera optical system group according to claim 1, wherein The total focal length of the imaging optical system group corresponding to an infinite object distance is fL, the focal length of the third lens is f3, the maximum value of the spacing distance between all adjacent lenses on the optical axis of the imaging optical system group corresponding to an infinite object distance is ATLmax, and the maximum imaging height of the imaging optical system group is ImgH, which satisfies the following conditions: 0 < |fL / f3| < 2.20; and 1.15 < ATLmax / ImgH < 4.

50.

9. The camera optical system group according to claim 1, wherein The total number of lenses in the imaging optical system group is at least seven, and the seventh lens counted from the object side in the imaging optical system group has a negative refractive power; Among them, the focal length of the third lens is f3, the focal length of the second lens counted from the image side in the imaging optical system group is flast2, the spacing distance between the first lens and the second lens on the optical axis is T12, and the spacing distance between the second lens and the third lens on the optical axis is T23, which satisfies the following conditions: -6.50 < flast2 / f3 < 0.70; and 0.01 < T12 / T23 < 2.

00.

10. The camera optical system group according to claim 1, wherein When the object distance of the imaging optical system group corresponds to infinity, the total focal length is fL, and the maximum imaging height of the imaging optical system group is ImgH, which satisfies the following conditions: 50.00 mm < fL < 80.00 mm; and 3.00 mm < ImgH < 5.50 mm.

11. The camera optical system group according to claim 1, wherein The combined focal length of the first lens and the second lens is f12. The combined focal length of the fifth lens and the sixth lens counted from the object side in the imaging optical system group is f56. When the object distance of the imaging optical system group corresponds to infinity, the total focal length is fL. When the object distance of the imaging optical system group corresponds to infinity, the principal ray incident angle at the maximum imaging height position is CRAL. When the object distance of the imaging optical system group corresponds to infinity, half of the maximum viewing angle is HFOVL, which satisfies the following conditions: -4.30 < f12 / f56 < 0.30; and 3.00 [mm / deg] < fL / (CRAL + HFOVL) < 15.00 [mm / deg].

12. The camera optical system group according to claim 1, characterized by, The total number of lenses in the second lens group is six; Among them, when the object distance of the imaging optical system group corresponds to infinity, the maximum effective radius of the lens surface of the first lens group closest to the image side is YLA1Rlast, and the maximum effective radius of the lens surface of the second lens group closest to the object side is YLA2R1. When the object distance of the imaging optical system group corresponds to infinity, the distance parallel to the optical axis between the position of the maximum effective radius of the lens surface of the first lens group closest to the image side and the position of the maximum effective radius of the lens surface of the second lens group closest to the object side is ETLA12, which satisfies the following conditions: 0.27 < (YLA1Rlast - YLA2R1) / ETLA12 < 0.

75.

13. The camera optical system group according to claim 1, characterized by When the object distance of the imaging optical system group corresponds to infinity, the lens with the smallest effective radius among all lenses of the imaging optical system group is the second lens counted from the image side or the third lens counted from the image side in the imaging optical system group; Among them, the maximum value of the thickness of the singlet lens on the optical axis among all lenses of the imaging optical system group is CTmax, and the maximum value of the spacing distance on the optical axis between all adjacent lenses when the object distance of the imaging optical system group corresponds to infinity is ATLmax, which satisfies the following conditions: 0.25 < CTmax / ATLmax < 1.

00.

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

15. An image pickup optical system group characterized by comprising: Sequentially includes a first lens group, an aperture, and a second lens group along the optical path from the object side to the image side, and all lenses of the imaging optical system group respectively have an object side surface facing the object side direction and an image side surface facing the image side direction; Among them, the total number of lenses in the first lens group is one to three, the total number of lenses in the second lens group is five to eight, and there are no other interpolated lenses between the first lens group and the second lens group; Among them, the first lens group includes a first lens closest to the object side, the second lens group includes a last lens closest to the image side, the imaging optical system group further sequentially includes a second lens, a third lens, a fourth lens, and a fifth lens between the first lens and the last lens along the optical path, and there are no other interpolated lenses between the first lens and the fifth lens; Among them, the first lens group has a positive refractive power, and the second lens group has a negative refractive power; Among them, the object-side surface of the first lens is convex near the optical axis, the object-side surface of the second lens is convex near the optical axis, the object-side surface of the third lens is convex near the optical axis, the image-side surface of the third lens is concave near the optical axis, and the object-side surface of the fourth lens is convex near the optical axis; Among them, the total focal length of the imaging optical system group corresponding to an infinite object distance is fL, the focal length of the i-th lens counted from the object side in the imaging optical system group is fi, the minimum value of fL / fi is MIN(fL / fi), the focal length of the first lens group is fA1, the maximum value of the thickness of a singlet lens on the optical axis among all the lenses of the imaging optical system group is CTmax, the maximum value of the interval distance on the optical axis between all adjacent lenses of the imaging optical system group corresponding to an infinite object distance is ATLmax, and they satisfy the following conditions: -15.00 < MIN(fL / fi) < -2.80, where i is a positive integer, and 1 ≤ i ≤ the total number of lenses of the imaging optical system group; 1.20 < fL / fA1 < 3.00; and 0.20 < CTmax / ATLmax < 1.

50.

16. The camera optical system group according to claim 15, characterized by The total number of lenses of the second lens group is at least six; Among them, the total focal length of the imaging optical system group corresponding to an infinite object distance is fL, the focal length of the i-th lens counted from the object side in the imaging optical system group is fi, the minimum value of fL / fi is MIN(fL / fi), and they satisfy the following conditions: -12.50 < MIN(fL / fi) < -4.30, where i is a positive integer, and 1 ≤ i ≤ the total number of lenses of the imaging optical system group.

17. The camera optical system group according to claim 15, wherein The total focal length of the imaging optical system group corresponding to an infinite object distance is fL, and the distance from the object-side surface of the first lens to an imaging surface on the optical axis is TL, and they satisfy the following conditions: 1.20 < fL / TL < 1.

80.

18. The camera optical system group according to claim 15, wherein The total focal length of the imaging optical system group corresponding to an infinite object distance is fL, the focal length of the first lens group is fA1, the focal length of the second lens is f2, and the focal length of the fourth lens is f4, and they satisfy the following conditions: 1.35 < fL / fA1 < 2.65; and -0.20 < f4 / f2 < 0.

85.

19. The camera optical system group according to claim 15, wherein The combined focal length of the first lens and the second lens is f12, and the combined focal length of the second lens and the third lens is f23, and they satisfy the following conditions: -0.35 < f12 / f23 < 3.

00.

20. The camera optical system assembly according to claim 15, characterized in that, All the lenses of the imaging optical system group include at least two glass lenses and at least two plastic lenses; Among them, the total focal length of the imaging optical system group corresponding to an infinite object distance is fL, the focal length of the fifth lens is f5, the focal length of the sixth lens counted from the object side in the imaging optical system group is f6, and the minimum value of fL / f5 and fL / f6 is MIN(fL / f5, fL / f6), which satisfies the following conditions: -13.50 < MIN(fL / f5, fL / f6) < -1.

00.

21. The camera optical system assembly according to claim 15, characterized in that, The radius of curvature of the object-side surface of the third lens is R5, the radius of curvature of the image-side surface of the third lens is R6, the total focal length of the imaging optical system group corresponding to an infinite object distance is fL, the combined focal length of the first lens and the second lens is f12, and the combined focal length of the fifth lens and the sixth lens counted from the object side in the imaging optical system group is f56, which satisfies the following conditions: 0.05 < (R5 + R6) / fL < 3.00; and -3.30 < f12 / f56 < 0.

22. The camera optical system assembly according to claim 15, characterized in that, The radius of curvature of the object-side surface of the third lens is R5, and the radius of curvature of the object-side surface of the first lens counted from the image side in the imaging optical system group is Rlast2, which satisfies the following conditions: -1.50 < R5 / Rlast2 < 5.

00.

23. The camera optical system assembly according to claim 15, characterized in that, Half of the maximum viewing angle of the imaging optical system group corresponding to an infinite object distance is HFOVL, the total focal length of the imaging optical system group corresponding to an infinite object distance is fL, and the focal length of the third lens is f3, which satisfies the following conditions: 1.5 degrees < HFOVL < 6.0 degrees; and 0.01 < |fL / f3| < 2.

10.

24. The camera optical system assembly according to claim 15, characterized in that, The second lens group sequentially includes a convex-concave lens, an achromatic lens group, and an aspherical lens along the optical path from the object side to the image side. The achromatic lens group has a negative refractive power, and the achromatic lens group is sequentially composed of a biconvex positive lens and a biconcave negative lens combination along the optical path from the object side to the image side.

25. The camera optical system assembly according to claim 15, characterized in that, The total number of lenses in the first lens group is two. The imaging optical system group performs a focusing process by moving at least one lens in the second lens group to perform focusing. The imaging optical system group has at least two shooting states through the focusing process, and the object distance corresponding to one of the at least two shooting states of the imaging optical system group is 15000 mm or less; Among them, the entrance pupil diameter of the imaging optical system group is EPD, which satisfies the following conditions: 15.00 mm < EPD < 32.00 mm.

26. The camera optical system assembly according to claim 15, characterized in that, When the imaging optical system group corresponds to an infinite object distance, the distance parallel to the optical axis between the maximum effective radius position of the object-side surface of the third lens and the maximum effective radius position of the image-side surface of the third lens is ETL3. When the imaging optical system group corresponds to an infinite object distance, the distance parallel to the optical axis between the maximum effective radius position of the object-side surface of the last lens and the maximum effective radius position of the image-side surface of the last lens is ETLlast. The thickness of the third lens on the optical axis is CT3, and the thickness of the last lens on the optical axis is CTlast, and they satisfy the following conditions: 0.15 < ETL3 / CT3 < 3.00; and 0.15 < ETLlast / CTlast < 2.

00.

27. The camera optical system assembly according to claim 15, characterized in that, The distance between the first lens and the second lens on the optical axis is T12. When the imaging optical system group corresponds to an infinite object distance, the distance parallel to the optical axis between the maximum effective radius position of the image-side surface of the first lens and the maximum effective radius position of the object-side surface of the second lens is ETL12, and it satisfies the following conditions: 0.05 < 10×T12 / ETL12 < 3.

50.

28. The camera optical system assembly according to claim 15, characterized in that, When the imaging optical system group corresponds to an infinite object distance, the total focal length is fL. The focal length of the i-th lens counted from the object side in the imaging optical system group is fi, and the minimum value of fL / fi is MIN(fL / fi). The focal length of the second lens is f2, the focal length of the fifth lens is f5, and the focal length of the sixth lens counted from the object side in the imaging optical system group is f6. The minimum value of fL / f5 and fL / f6 is MIN(fL / f5,fL / f6). The radius of curvature of the object-side surface of the third lens is R5, the radius of curvature of the image-side surface of the third lens is R6, and the radius of curvature of the object-side surface of the first lens counted from the image side in the imaging optical system group is Rlast2. When the imaging optical system group corresponds to an infinite object distance, the maximum value of the distance between all adjacent lenses on the optical axis is ATLmax. The maximum imaging height of the imaging optical system group is ImgH. The focal length of the first lens group is fA1. The maximum value of the thickness of a single lens on the optical axis among all the lenses in the imaging optical system group is CTmax. When the imaging optical system group corresponds to an infinite object distance, half of the maximum viewing angle is HFOVL, and it satisfies the following conditions: -11.51 ≤ MIN(fL / fi) ≤ -5.16, where i is a positive integer and 1 ≤ i ≤ the total number of lenses in the imaging optical system group; -11.51 ≤ MIN(fL / f5,fL / f6) ≤ -2.33; 0.32 ≤ (R5 + R6) / fL ≤ 0.95; 1.30 ≤ ATLmax / ImgH ≤ 3.30; 1.49 ≤ fL / fA1 ≤ 2.48; 0.38 ≤ CTmax / ATLmax ≤ 0.86; -0.29 ≤ R5 / Rlast2 ≤ 1.91; -0.50 ≤ fL / f2 ≤ 1.87; and 3.0 degrees ≤ HFOVL ≤ 4.9 degrees.

29. A camera optical system assembly, characterized in that, It includes multiple lenses, the total number of which is eight to nine. The lenses sequentially include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens along the optical path from an object side to an image side, and the lenses respectively have an object side surface facing the object side direction and an image side surface facing the image side direction; Among them, the first lens is the lens closest to the object side among all the lenses of the imaging optical system group, and there are no other interpolated lenses between the first lens and the eighth lens; Among them, the first lens has a positive refractive power, the object side surface of the second lens is convex near the optical axis, the object side surface of the third lens is convex near the optical axis, the image side surface of the third lens is concave near the optical axis, and the object side surface of the fourth lens is convex near the optical axis; Among them, the imaging optical system group further includes an aperture, and the aperture is located between the first lens and the fourth lens; Among them, the total focal length of the imaging optical system group corresponding to an infinite object distance is fL, the focal length of the i-th lens counted from the object side in the imaging optical system group is fi, the minimum value of fL / fi is MIN(fL / fi), the focal length of the second lens is f2, the radius of curvature of the object side surface of the third lens is R5, the radius of curvature of the object side surface of the first lens counted from the image side in the imaging optical system group is Rlast2, and half of the maximum viewing angle of the imaging optical system group corresponding to an infinite object distance is HFOVL, which satisfies the following conditions: -13.80 < MIN(fL / fi) < -3.80, where i is a positive integer and 1 ≤ i ≤ the total number of lenses of the imaging optical system group; -1.00 < R5 / Rlast2 < 4.50; -1.50 < fL / f2 < 4.50; and 1.0 degree < HFOVL < 7.5 degrees.

30. The camera optical system assembly according to claim 29, characterized in that, The total number of the lenses is eight; Among them, the maximum imaging height of the imaging optical system group is ImgH, the entrance pupil diameter of the imaging optical system group is EPD, the maximum effective radius of the object side surface of the first lens of the imaging optical system group corresponding to an infinite object distance is YL1R1, and the maximum effective radius of the image side surface of the eighth lens of the imaging optical system group corresponding to an infinite object distance is YL8R2, which satisfies the following conditions: 0.10 < 2 × ImgH / EPD < 0.70; and 2.00 < YL1R1 / YL8R2 < 4.

00.

31. The camera optical system assembly according to claim 30, characterized in that, The image side surface of the fifth lens is concave near the optical axis; Among them, the radius of curvature of the object side surface of the third lens is R5, and the radius of curvature of the object side surface of the first lens counted from the image side in the imaging optical system group is Rlast2, which satisfies the following conditions: -0.60 < R5 / Rlast2 < 2.

30.

32. The camera optical system assembly according to claim 30, characterized in that, The Abbe number of the sixth lens is V6, the refractive index of the sixth lens is N6, the total focal length of the imaging optical system group corresponding to an infinite object distance is fL, and the focal length of the fourth lens is f4, which satisfies the following conditions: 5.00 < V6 / N6 < 14.80; and 2.50 < fL / f4 < 5.

20.

33. The camera optical system assembly according to claim 30, characterized in that, The second lens has a positive refractive power, the fourth lens has a positive refractive power, the fifth lens has a negative refractive power, the seventh lens has a negative refractive power, and the eighth lens has a positive refractive power.

34. The camera optical system assembly according to claim 29, characterized in that, The total number of lenses is nine; wherein, 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 satisfy the following conditions: 0 < T12 / T23 < 4.

00.

35. The camera optical system assembly according to claim 34, characterized in that, When the imaging optical system group corresponds to an infinite object distance, the maximum distance between all adjacent lenses on the optical axis is ATLmax, the maximum imaging height of the imaging optical system group is ImgH, the total focal length of the imaging optical system group when corresponding to an infinite object distance is fL, and the focal length of the second lens is f2, which satisfy the following conditions: 1.20 < ATLmax / ImgH < 3.50; and -0.80 < fL / f2 < 2.

20.

36. The camera optical system assembly according to claim 34, characterized in that, The distance between the fifth lens and the sixth lens on the optical axis is T56, the thickness of the fourth lens on the optical axis is CT4, the thickness of the fifth lens on the optical axis is CT5, and the thickness of the sixth lens on the optical axis is CT6, which satisfy the following conditions: 0.05 < (T56 + CT6) / (CT4 + CT5) < 0.75.

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