Image capturing lens system, image capturing device and electronic device

Abstract

This invention discloses an image capturing lens system assembly, comprising a front lens group and a rear lens group sequentially from the object side to the image side of the optical path. The front lens group comprises four lenses, and the rear lens group comprises four lenses. The second lens in the front lens group, counting from the image side, has negative refractive power. The first lens in the front lens group, counting from the image side, has a convex surface near the optical axis on its image side. The second lens in the rear lens group, counting from the object side, has negative refractive power. The first lens in the rear lens group, counting from the image side, has a concave surface near the optical axis on its object side. At least one lens in the rear lens group has at least one aspherical surface. Under certain conditions, the image capturing lens system assembly can simultaneously meet the requirements of long focal length, miniaturization, and high image quality. This invention also discloses an image capturing device having the image capturing lens system assembly and an electronic device having the image capturing device.

Description

Technical Field

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

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

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

[0004] The present invention provides an image capturing lens system group, an imaging device, and an electronic device. Among them, the image capturing lens system group sequentially includes a front lens group and a rear lens group along the optical path from the object side to the image side. The front lens group includes at least one lens, the rear lens group includes at least two lenses, and these lenses are sequentially arranged along the optical path from the object side to the image side. When specific conditions are met, the image capturing lens system group provided by the present invention can simultaneously meet the requirements of long focal length, miniaturization, and high imaging quality.

[0005] The present invention provides an image capturing lens system group, which sequentially includes a front lens group and a rear lens group along the optical path from the object side to the image side. The front lens group includes four lenses, and the rear lens group includes four lenses. The four lenses of the front lens group and the four lenses of the rear lens group each have an object side surface facing the object side direction and an image side surface facing the image side direction. The second lens counted from the image side of the front lens group has a negative refractive power. The image side surface of the first lens counted from the image side of the front lens group is convex near the optical axis. The second lens counted from the object side of the rear lens group has a negative refractive power. The object side surface of the first lens counted from the image side of the rear lens group is concave near the optical axis. At least one surface of the object side surface and the image side surface of at least one lens in the rear lens group is an aspherical surface. The Abbe number of the first lens counted from the image side of the rear lens group is Vrr1, the Abbe number of the second lens counted from the image side of the rear lens group is Vrr2, the distance between the image side surface of the first lens counted from the image side of the front lens group and the object side surface of the first lens counted from the object side of the rear lens group on the optical axis is TGfGr, and the thickness of the first lens counted from the image side of the front lens group on the optical axis is Tfr1, which satisfies the following conditions:

[0006] 1.2 < Vrr1 / Vrr2 < 7.5; and

[0007] 2.4 < TGfGr / Tfr1.

[0008] The present invention further provides an image capturing lens system group, which sequentially includes a front lens group and a rear lens group along the optical path from the object side to the image side. The front lens group includes one lens, and the rear lens group includes four lenses. Each of the one lens of the front lens group and the four lenses of the rear lens group has an object side surface facing the object side direction and an image side surface facing the image side direction. The first lens counted from the object side of the front lens group has a convex surface at the near optical axis of its object side surface. The second lens counted from the object side of the rear lens group has a negative refractive power. The object side surface of the second lens counted from the object side of the rear lens group is concave at the near optical axis. The object side surface of the second lens counted from the image side of the rear lens group is convex at the near optical axis. The first lens counted from the image side of the rear lens group has a negative refractive power. At least one surface of the object side surface and the image side surface of at least one lens in the rear lens group is an aspherical surface. The Abbe number of the first lens counted from the image side of the rear lens group is Vrr1, the Abbe number of the second lens counted from the image side of the rear lens group is Vrr2, the distance on the optical axis between the image side surface of the first lens counted from the image side of the front lens group and the object side surface of the first lens counted from the object side of the rear lens group is TGfGr, and the thickness of the first lens counted from the image side of the front lens group on the optical axis is Tfr1, which satisfies the following conditions:

[0009] 1.2 < Vrr1 / Vrr2 < 7.5; and

[0010] 1.6 < TGfGr / Tfr1.

[0011] The present invention further provides an image capturing lens system group, which includes a first front lens group, a second front lens group, a rear lens group, and an optical path switching structure. The optical path switching structure is used to enable the image capturing lens system group to switch between a first optical path state and a second optical path state. When the image capturing lens system group is in the first optical path state, the image capturing lens system group sequentially includes the first front lens group and the rear lens group on a first optical path from the object side to the image side. When the image capturing lens system group is in the second optical path state, the image capturing lens system group sequentially includes the second front lens group and the rear lens group on a second optical path from the object side to the image side. The first front lens group includes at least three lenses, the second front lens group includes at least one lens, and the rear lens group includes at least two lenses. At least three lenses of the first front lens group, at least one lens of the second front lens group, and at least two lenses of the rear lens group each have an object side surface facing the object side direction and an image side surface facing the image side direction. At least one surface of the object side surface and the image side surface of at least one lens in the rear lens group is an aspherical surface. The focal length of the image capturing lens system group in the first optical path state is FS1, the focal length of the image capturing lens system group in the second optical path state is FS2, and the minimum Abbe number of all lenses in the rear lens group is minVGr, which satisfies the following conditions:

[0012] 1.2 < FS1 / FS2; and

[0013] 8.0 < minVGr < 26.5.

[0014] The present invention provides an imaging device, which includes the aforementioned image capturing lens system group and an electronic photosensitive element, wherein the electronic photosensitive element is disposed on the imaging surface of the image capturing lens system group.

[0015] The present invention provides an electronic device, which includes the aforementioned imaging device.

[0016] When Vrr1 / Vrr2 satisfies the above conditions, the lens material distribution of the rear lens group can be adjusted, which helps to correct aberration and form a long focal length configuration.

[0017] When TGfGr / Tfr1 satisfies the above conditions, the front and rear lens groups can cooperate with each other, which helps to form a telescopic characteristic. In addition, when applied to a system with switchable optical paths, for example, it is beneficial to the design of the optical path switching structure and helps to reduce the overall volume of the image capturing lens system group.

[0018] When FS1 / FS2 satisfies the above conditions, the focal lengths of the first optical path state and the second optical path state can be adjusted, which helps to increase the zoom ratio.

[0019] When minVGr satisfies the above conditions, the material distribution of the rear lens group can be adjusted, which helps to correct chromatic aberration.

[0020] The foregoing description of the invention and the following description of the embodiments are intended to demonstrate and explain the spirit and principles of the invention, and to provide a further explanation of the claims. Attached Figure Description

[0021] Figure 1 A schematic diagram illustrating the image capturing lens system assembly of the image capturing device according to the first embodiment of the present invention in the first optical path state.

[0022] Figure 2 A schematic diagram illustrating the image capturing lens system assembly of the image capturing device according to the first embodiment of the present invention in the second optical path state.

[0023] Figure 3 From left to right, the images are curves showing spherical aberration, astigmatism, and distortion of the image capturing lens system of the first embodiment in the first optical path state.

[0024] Figure 4 From left to right, the images are curves showing spherical aberration, astigmatism, and distortion of the image capturing lens system of the first embodiment in the second optical path state.

[0025] Figure 5 A schematic diagram illustrating the first optical path of the imaging device according to the first embodiment of the present invention is deflected by a reflective element.

[0026] Figure 6 A schematic diagram illustrating an embodiment of the imaging device according to the first embodiment of the present invention, in which the second optical path is deflected by a reflective element.

[0027] Figure 7 A schematic diagram illustrating another embodiment of the imaging device according to the first embodiment of the present invention, in which the second optical path is deflected by a reflective element.

[0028] Figure 8 A schematic diagram illustrating another embodiment of the imaging device according to the first embodiment of the present invention, in which the second optical path is deflected by a reflective element.

[0029] Figure 9 A schematic diagram illustrating the image capturing lens system assembly of the image capturing device according to the second embodiment of the present invention in the first optical path state.

[0030] Figure 10 A schematic diagram illustrating the image capturing lens system assembly of the image capturing device according to the second embodiment of the present invention in the second optical path state.

[0031] Figure 11 From left to right, the images are curves showing spherical aberration, astigmatism, and distortion of the image capturing lens system of the second embodiment in the first optical path state.

[0032] Figure 12 From left to right, the images are curves showing spherical aberration, astigmatism, and distortion of the image capturing lens system of the second embodiment in the second optical path state.

[0033] Figure 13 A schematic diagram illustrating the image capturing lens system assembly of the image capturing device according to the third embodiment of the present invention in the first optical path state.

[0034] Figure 14 A schematic diagram illustrating the image capturing lens system assembly of the image capturing device according to the third embodiment of the present invention in the second optical path state.

[0035] Figure 15 From left to right, the images are curves showing spherical aberration, astigmatism, and distortion of the image capturing lens system of the third embodiment in the first optical path state.

[0036] Figure 16 From left to right, the images are curves showing spherical aberration, astigmatism, and distortion of the image capturing lens system of the third embodiment in the second optical path state.

[0037] Figure 17 A schematic diagram illustrating the image capturing lens system assembly of the image capturing device according to the fourth embodiment of the present invention in the first optical path state.

[0038] Figure 18 A schematic diagram illustrating the image capturing lens system assembly of the image capturing device according to the fourth embodiment of the present invention in the second optical path state.

[0039] Figure 19 From left to right, the images are curves showing spherical aberration, astigmatism, and distortion of the image capturing lens system of the fourth embodiment in the first optical path state.

[0040] Figure 20 From left to right, the images are curves showing spherical aberration, astigmatism, and distortion of the image capturing lens system of the fourth embodiment in the second optical path state.

[0041] Figure 21 A perspective view of one side of an electronic device according to a fifth embodiment of the present invention is shown.

[0042] Figure 22 Draw Figure 21 A three-dimensional diagram of the other side of the electronic device.

[0043] Figure 23 A perspective view of one side of an electronic device according to a sixth embodiment of the present invention is shown.

[0044] Figure 24A schematic diagram illustrating the critical point of the object-side surface of the fourth lens of the rear group according to the first embodiment of the present invention and the parameters Yff1f, Yfr1r, Yrf1f, Yrr1r, Yrr1f, YCrr1f, ImgH, Tff1, Tff1ff2_1, Tff1ff2_2, Tfr1, TGm, TGf_1, TGf_2, TGfGr, TL_1, TL_2.

[0045] Figure 25 A schematic diagram illustrating the parameters Yff1f, Yfr1r, Tff1, Tfr1, TGfGr_1, TGfGr_2, TL_1, and TL_2 of the image capturing lens system group in the second optical path state according to the first embodiment of the present invention.

[0046] Figure 26 A side view schematic diagram illustrating the configuration of an optical path switching structure according to the present invention in an image capturing lens system assembly.

[0047] Figure 27 A top view schematic diagram illustrating the configuration of another optical path switching structure according to the present invention in an image capturing lens system assembly.

[0048] Figure 28 A top view schematic diagram illustrating the configuration of another optical path switching structure according to the present invention in an image capturing lens system assembly.

[0049] Figure 29 A top view schematic diagram illustrating the configuration of another optical path switching structure according to the present invention in an image capturing lens system assembly.

[0050] Figure 30 A schematic diagram illustrating an arrangement of an optical path deflection element in an image capturing lens system according to the present invention is shown.

[0051] Figure 31 A schematic diagram illustrating another configuration of an optical path reversing element according to the present invention in an image capturing lens system assembly is shown.

[0052] Figure 32 A schematic diagram illustrating one configuration of two optical path deflection elements in an image capturing lens system according to the present invention is shown.

[0053] [Symbol Explanation]

[0054] 1,2,3,4,100,100a,100b,100c,100d,100e,100f,100g,100h,100i,100j,100k,100m,100n,100p: Image capturing device

[0055] 200, 300: Electronic devices

[0056] 201,301: Flash module

[0057] 202: Display device

[0058] C: Critical point

[0059] OA1: First optical axis

[0060] OA2: Second optical axis

[0061] OA3: Third optical axis

[0062] LF: Optical path switching element

[0063] LF1: First optical path switching element

[0064] LF2: Second optical path switching element

[0065] LG: Lens Group

[0066] ST1, ST2: Aperture

[0067] S1: Aperture

[0068] E1, E2c, E4: Prisms

[0069] E2, E2b: Reflectors

[0070] SRM: Reflective element

[0071] E1S, E2S: Reflecting surfaces

[0072] E3: Filter element

[0073] Gf1: First front lens group

[0074] Gf2: Second front lens group

[0075] Gr: Rear lens group

[0076] Gm: Movable lens subgroup

[0077] IS: Electronic photosensitive element

[0078] IMG: Imaging Surface

[0079] Lf11: First lens of the first front group

[0080] Lf12: Second lens of the first front group

[0081] Lf13: Third lens of the first front group

[0082] Lf14: Fourth lens of the first front group

[0083] Lf21: First lens of the second front group

[0084] Lr1: First lens of the rear group

[0085] Lr2: Second lens in the rear group

[0086] Lr3: Third lens in the rear group

[0087] Lr4: Fourth lens in the rear group

[0088] ImgH: Maximum imaging height of the image capturing lens system assembly. Tfr1: Thickness of the first lens on the optical axis, determined by the image side number.

[0089] TGm: Thickness of the movable lens subgroup along the optical axis

[0090] Tff1: The thickness of the first lens on the optical axis of the front lens group is determined by the object-side number.

[0091] Tff1ff2_1: The distance on the optical axis between the image-side surface of the first lens and the reflecting surface of the reflecting element, determined by the object-side number, is calculated from the first lens.

[0092] Tff1ff2_2: The distance between the reflecting surface of the reflecting element and the first front lens group, measured from the object side, and the distance from the object side surface of the second lens on the optical axis.

[0093] TGfGr: The distance on the optical axis between the image-side surface of the first lens in the front lens group and the object-side surface of the first lens in the rear lens group.

[0094] TGfGr_1: The second front lens group is determined by the image-side number, which is the distance on the optical axis between the image-side surface of the first lens and the reflecting surface of the reflecting element.

[0095] TGfGr_2: The distance between the reflecting surface of the reflecting element and the rear lens group, measured from the object side, of the object-side surface of the first lens on the optical axis.

[0096] TGf_1: The distance on the optical axis between the object-side surface of the first lens and the reflecting surface of the reflecting element, determined by the object-side number of the first lens group.

[0097] TGf_2: The distance between the reflecting surface of the reflecting element and the first front lens group, measured from the image side, is the distance on the optical axis from the image side surface of the first lens.

[0098] TGr: The distance on the optical axis between the object-side surface of the first lens in the rear lens group (numbered from the object side) and the image-side surface of the first lens in the rear lens group (numbered from the image side).

[0099] TL_1: The distance on the optical axis between the object-side surface of the first lens and the reflecting surface of the reflecting element, determined by the object-side number of the front lens group.

[0100] TL_2: Distance between the reflecting surface and the imaging surface of the reflecting element on the optical axis.

[0101] Yff1f: The front lens group is determined by the object-side number, specifically the maximum effective radius of the first lens's object-side surface.

[0102] Yfr1r: The front lens group is determined by the image-side number, and the first lens has the maximum effective radius of its image-side surface.

[0103] Yrf1f: The rear lens group is determined by the object-side number, which represents the maximum effective radius of the first lens's object-side surface.

[0104] Yrr1f: The rear lens group is determined by the image-side number, which represents the maximum effective radius of the object-side surface of the first lens.

[0105] Yrr1r: The rear lens group is determined by the image-side number, and the first lens has the maximum effective radius of its image-side surface.

[0106] YCrr1f: The rear lens group is determined by the image side number. The vertical distance between the object-side surface of the first lens at the critical point off-axis and the optical axis is... Detailed Implementation

[0107] The image capturing lens system assembly comprises a front lens group and a rear lens group sequentially from the object side to the image side along the optical path. The front lens group contains at least one lens, and the rear lens group contains at least two lenses, thereby improving image quality. Each of the lenses in the front and rear lens groups has an object-side surface facing the object side and an image-side surface facing the image side.

[0108] The image capturing lens system assembly may include at least one reflective element, which may be, for example, a prism or plane mirror with a reflective surface; thereby, it can be used to deflect the optical path, allowing for more flexible configuration. The reflective element may be disposed in the front lens group; thereby, the lens configuration can be adjusted, contributing to improved image quality. Alternatively, the reflective element may be disposed between the front and rear lens groups; thereby, the lens configuration can be adjusted to achieve a balance between volume distribution and image quality. The reflective element can be used, for example, in systems with switchable optical paths, helping to reduce the overall size of the system.

[0109] In some embodiments, the front lens group includes one lens; this helps to achieve a balance between angle of view, size, and image quality. In some embodiments, the front lens group may include at least two lenses; this helps to improve image quality and create a telephoto configuration. The front lens group may also include at least three lenses. The front lens group may also include at least four lenses. In some embodiments, the front lens group may include four lenses; this helps to achieve a balance between angle of view, size, and image quality.

[0110] Please refer to Figure 24 and Figure 25 ,in Figure 24 and Figure 25 A schematic diagram illustrating the image capturing lens system assembly in a first optical path state and a second optical path state according to a first embodiment of the present invention is shown. Figure 24 As shown, in the embodiment where the image capturing lens system is in the first optical path state and the front lens group includes four lenses, the first lens of the front lens group, counted from the object side, is the first lens of the first front group, Lf11; the second lens of the front lens group, counted from the object side, is the second lens of the first front group, Lf12; the second lens of the front lens group, counted from the image side, is the third lens of the first front group, Lf13; and the first lens of the front lens group, counted from the image side, is the fourth lens of the first front group, Lf14. Figure 25 As shown, in the embodiment where the image capturing lens system is in the second optical path state and the front lens group includes a lens, the first lens of the front lens group is the second front group first lens Lf21 according to the object side number, and the first lens of the front lens group is the second front group first lens Lf21 according to the image side number.

[0111] The first lens in the front lens group, counting from the object side, can have positive refractive power; this helps to reduce the volume of the front lens group. The object-side surface of the first lens in the front lens group, counting from the object side, can be convex near the optical axis; this allows adjustment of the direction of light entering the image capturing lens system assembly, helping to reduce the outer diameter of the front lens group.

[0112] The second lens in the front lens group, counting from the image side, can have negative refractive power; this helps to balance the refractive power of the front lens group to correct aberrations. The image-side surface of the second lens in the front lens group, counting from the image side, can be concave near the optical axis; this allows adjustment of the direction of light travel and helps to reduce the outer diameter of the front lens group.

[0113] The first lens in the front lens group, counting from the image side, can have positive refractive power; this helps to cooperate with the rear lens group to compress the outer diameter of the image capturing lens system assembly. The object-side surface of the first lens in the front lens group, counting from the image side, can be concave near the optical axis; this allows it to cooperate with other lenses to correct aberrations. The image-side surface of the first lens in the front lens group, counting from the image side, can be convex near the optical axis; this allows adjustment of the light-traveling direction, helping to adjust the spacing between the front and rear lens groups within an appropriate range.

[0114] In some embodiments, the rear lens group may include at least three lenses; this helps to improve image quality and create a telephoto configuration. Alternatively, the rear lens group may include at least four lenses. In some embodiments, the rear lens group may include four lenses; this helps to achieve a balance between angle of view, size, and image quality.

[0115] At least one lens in the rear lens group has at least one of its object-side and image-side surfaces aspherical; thereby, the degree of surface variation of the lens can be increased to correct aberrations and reduce the lens volume.

[0116] Please refer to Figure 24 and Figure 25 In an embodiment where the rear lens group comprises four lenses, the first lens in the rear lens group, counted from the object side, is the first lens of the rear lens group Lr1, the second lens in the rear lens group, counted from the object side, is the second lens of the rear lens group Lr2, the second lens in the rear lens group, counted from the image side, is the third lens of the rear lens group Lr3, and the first lens in the rear lens group, counted from the image side, is the fourth lens of the rear lens group Lr4.

[0117] The first lens in the rear lens group, from the object-side perspective, can have positive refractive power; this helps to reduce the volume of the rear lens group. The object-side surface of the first lens in the rear lens group, from the object-side perspective, can be convex near the optical axis; this allows adjustment of the direction of light entering the rear lens group, helping to reduce its outer diameter. The image-side surface of the first lens in the rear lens group, from the object-side perspective, can be convex near the optical axis; this allows adjustment of the surface shape and refractive power of the first lens in the rear lens group, from the object-side perspective, helping to reduce its length.

[0118] The second lens in the rear lens group, counting from the object side, can have negative refractive power; this allows it to work in conjunction with the first lens in the rear lens group, counting from the object side, to balance the refractive power distribution and help correct aberrations such as spherical aberration. The object-side surface of the second lens in the rear lens group, counting from the object side, can be concave near the optical axis; this allows it to work in conjunction with the first lens in the rear lens group, counting from the object side, to correct aberrations.

[0119] The second lens in the rear lens group, from the image side, can have positive refractive power; thereby, it can cooperate with the first lens in the rear lens group, from the image side, to correct aberrations. The object-side surface of the second lens in the rear lens group, from the image side, can be convex near the optical axis; thereby, the surface shape and refractive power of the second lens in the rear lens group, from the image side, can be adjusted, which helps to compress the outer diameter of the rear lens group.

[0120] The first lens counted from the image side of the rear lens group may have a negative refractive power; thereby, it helps to adjust the back focal length within an appropriate range. The object-side surface of the first lens counted from the image side of the rear lens group may be concave near the optical axis; thereby, the surface shape and refractive power of the first lens counted from the image side of the rear lens group can be adjusted to correct aberrations. The object-side surface of the first lens counted from the image side of the rear lens group may have at least one critical point off the axis; thereby, it helps to correct off-axis aberrations such as field curvature. Among them, the perpendicular distance between the critical point off the axis of the object-side surface of the first lens counted from the image side of the rear lens group and the optical axis is YCrr1f, the maximum effective radius of the object-side surface of the first lens counted from the image side of the rear lens group is Yrr1f, and the object-side surface of the first lens counted from the image side of the rear lens group may have at least one critical point off the axis that satisfies the following condition: 0.50 < YCrr1f / Yrr1f < 0.90; thereby, aberrations can be further corrected. Please refer to Figure 24 , a schematic diagram showing the parameters YCrr1f, Yrr1f and the critical point C off the axis of the object-side surface of the fourth lens Lr4 in the rear group according to the first embodiment of the present invention. Figure 24 The critical point C off the axis of the object-side surface of the fourth lens Lr4 in the rear group in the first embodiment of the present invention is shown as an exemplary illustration. However, in this embodiment and other embodiments of the present invention, the object-side surface and the image-side surface of each lens may have one or more critical points off the axis.

[0121] The image capturing lens system group disclosed in the present invention may include two front lens groups, namely the first front lens group and the second front lens group. In some embodiments, the first front lens group includes four lenses, the second front lens group includes one lens, and the rear lens group includes four lenses. In addition, the image capturing lens system group may further include an optical path switching structure, and the optical path switching structure is used to enable the image capturing lens system group to switch between a first optical path state and a second optical path state. When the image capturing lens system group is in the first optical path state, the image capturing lens system group sequentially includes the first front lens group and the rear lens group on a first optical path from the object side to the image side. When the image capturing lens system group is in the second optical path state, the image capturing lens system group sequentially includes the second front lens group and the rear lens group on a second optical path from the object side to the image side. Thereby, by sharing the rear lens group, the volume occupied by the two optical paths can be reduced. The focal length of the image capturing lens system group disclosed in the present invention in the first optical path state may be longer than that in the second optical path state. Please refer to Figure 1 , Figure 2 , Figure 5 and Figures 6 to 8 , where Figure 1 and Figure 5 a schematic diagram of the image capturing lens system group in the first optical path state in the image capturing device according to the first embodiment of the present invention is shown, and Figure 2and Figures 6 to 8 Schematic diagrams are shown illustrating various implementations of the image capturing lens system assembly in the second optical path state in the image capturing device according to the first embodiment of the present invention.

[0122] The image capturing lens system assembly may include at least two reflective elements, which may include a first reflective element and a second reflective element. The first reflective element may be disposed in a first front lens group, and when the image capturing lens system assembly is in a second optical path state, the second reflective element may be located between a second front lens group and a rear lens group in the second optical path. This allows for adjustment of the lens configuration, which helps improve image quality and achieves a balance between volume distribution and imaging quality.

[0123] The optical path switching structure may include at least one reflective element, and the reflective element may move or rotate relative to the first front lens group, the second front lens group, or the rear lens group. This helps simplify the design of the optical path switching structure and reduce the volume occupied by the image capturing lens system assembly. For example, please refer to... Figure 26 and Figure 27 ,in Figure 26 A side view schematic diagram illustrating the configuration of an optical path switching structure according to the present invention in an image capturing lens system assembly is shown. Figure 27 A top view schematic diagram illustrating the configuration of another optical path switching structure according to the present invention in an image capturing lens system assembly.

[0124] exist Figure 26 In the embodiment, the optical path switching structure includes a reflective element SRM, which is, for example, a plane mirror. The reflective element SRM is rotatable relative to the first front lens group Gf1, the second front lens group Gf2, the rear lens group Gr, and the electronic photosensitive element IS. Thus, the optical path switching structure can switch the image capturing lens system assembly between a first optical path state and a second optical path state by rotating the reflective element SRM. Specifically, the optical path switching structure can rotate the reflective element SRM to position it between the second front lens group Gf2 and the rear lens group Gr in the second optical path (as shown by the dashed line), thereby switching the image capturing lens system assembly from the first optical path state to the second optical path state. Alternatively, it can rotate the reflective element SRM to move it out of the space between the second front lens group Gf2 and the rear lens group Gr, thereby switching the image capturing lens system assembly from the second optical path state to the first optical path state.

[0125] exist Figure 27In the embodiment, the optical path switching structure includes a reflective element SRM, which is movable relative to the first front lens group Gf1, the second front lens group Gf2, the rear lens group Gr, and the electronic photosensitive element IS. Thus, the optical path switching structure can switch the image capturing lens system assembly between a first optical path state and a second optical path state by moving the position of the reflective element SRM. Specifically, the optical path switching structure moves the reflective element SRM so that it is positioned between the second front lens group Gf2 and the rear lens group Gr in the second optical path (as shown by the dashed line), thereby switching the image capturing lens system assembly from the first optical path state to the second optical path state. Alternatively, it can move the reflective element SRM out of the space between the second front lens group Gf2 and the rear lens group Gr, thereby switching the image capturing lens system assembly from the second optical path state to the first optical path state.

[0126] Figure 26 and Figure 27 The diagram illustrates an optical path switching structure that achieves optical path switching by moving or rotating the reflective element, but this invention is not limited thereto. Please refer to... Figure 28 and Figure 29 ,in Figure 28 A top view schematic diagram illustrating the configuration of another optical path switching structure according to the present invention in an image capturing lens system assembly is shown. Figure 29 A top view schematic diagram illustrating the configuration of another optical path switching structure according to the present invention in an image capturing lens system assembly. Figure 28 In the embodiment, the optical path switching structure includes a rear lens group Gr and an electronic photosensitive element IS. The rear lens group Gr and the electronic photosensitive element IS are movable relative to the first front lens group Gf1 and the second front lens group Gf2. Thus, the optical path switching structure can switch the image capturing lens system assembly between a first optical path state and a second optical path state by moving the positions of the rear lens group Gr and the electronic photosensitive element IS. For example, the optical path switching structure moves the rear lens group Gr and the electronic photosensitive element IS from a position on the first optical path corresponding to the first front lens group Gf1 (as shown by the solid line) to a position on the second optical path corresponding to the second front lens group Gf2 (as shown by the dashed line), thereby switching the image capturing lens system assembly from the first optical path state to the second optical path state.

[0127] exist Figure 29In an embodiment, the optical path switching structure includes a first front lens group Gf1 and a second front lens group Gf2, and the first front lens group Gf1 and the second front lens group Gf2 are movable relative to the rear lens group Gr and the electronic photosensitive element IS. Thus, the optical path switching structure can switch the imaging lens system group between a first optical path state and a second optical path state by moving the positions of the first front lens group Gf1 and the second front lens group Gf2. For example, the optical path switching structure moves the first front lens group Gf1 and the second front lens group Gf2 from the position where the first front lens group Gf1 corresponds to the rear lens group Gr (as shown by the solid line) to the position where the second front lens group Gf2 corresponds to the rear lens group Gr (as shown by the dashed line), thereby switching the imaging lens system group from the first optical path state to the second optical path state. The optical path switching structure disclosed in the present invention can achieve optical path switching by moving or rotating some components (such as lenses or reflection elements, etc.). However, the types, quantities, and configurations of the components included in the optical path switching structure can be adjusted according to actual needs, and the present invention is not limited thereto.

[0128] The rear lens group may include a movable lens subgroup, and the movable lens subgroup includes at least one lens; thereby, it can be used for focusing and helps to improve the image quality. Among them, the movable lens subgroup may include the first lens counted from the image side of the rear lens group; thereby, the mechanism design can be simplified. Among them, when the imaging lens system group switches between the first optical path state and the second optical path state, the movable lens subgroup can move along the optical axis; thereby, the number of lenses required to achieve the same zoom ratio can be reduced, which helps to compress the volume. Among them, when the imaging lens system group switches from the first optical path state to the second optical path state, the movable lens subgroup can move along the optical axis toward the image side.

[0129] The movable lens subgroup may have a negative refractive power. Thereby, it helps to reduce the total length of the rear lens group. The focal length of the movable lens subgroup is FGm, and the thickness of the movable lens subgroup on the optical axis is TGm, and they can satisfy the following conditions: -50.0 < FGm / TGm < -10.0. Thereby, the configuration of the movable lens subgroup can be adjusted, which helps to compress the volume of the movable lens subgroup. Among them, the following conditions can also be satisfied: -40.0 < FGm / TGm < -13.0. Among them, the following conditions can also be satisfied: -30.0 < FGm / TGm < -16.0. Please refer to Figure 24, showing a schematic diagram of parameter TGm in the first embodiment of the present invention. The focal length of the movable lens group refers to the combined focal length of all the lenses in the movable lens group. The thickness of the movable lens group on the optical axis refers to the distance on the optical axis between the object-side surface of the first lens counted from the object side of the movable lens group and the image-side surface of the first lens counted from the image side of the movable lens group. In the embodiment where the movable lens group only includes a single lens, the focal length of the movable lens group refers to the focal length of the single lens, and the thickness of the movable lens group on the optical axis refers to the thickness of the single lens on the optical axis.

[0130] The Abbe number of the first lens counted from the image side of the rear lens group is Vrr1, and the Abbe number of the second lens counted from the image side of the rear lens group is Vrr2, which can satisfy the following conditions: 1.2 < Vrr1 / Vrr2 < 7.5. Thereby, the lens material distribution of the rear lens group can be adjusted, which helps to correct aberration and form a long focal length configuration. Among them, the following conditions can also be satisfied: 1.6 < Vrr1 / Vrr2 < 6.5. Among them, the following conditions can also be satisfied: 2.0 < Vrr1 / Vrr2 < 5.5.

[0131] The distance on the optical axis between the image-side surface of the first lens counted from the image side of the front lens group and the object-side surface of the first lens counted from the object side of the rear lens group is TGfGr, and the thickness of the first lens counted from the image side of the front lens group on the optical axis is Tfr1, which can satisfy the following conditions: 1.6 < TGfGr / Tfr1; thereby, the front and rear lens groups can cooperate with each other, which helps to form a telescopic characteristic. In addition, when applied to a system with switchable optical paths, for example, it is beneficial to the design of the optical path switching structure and helps to reduce the overall volume of the image capture lens system group. Among them, the following conditions can also be satisfied: 2.4 < TGfGr / Tfr1. Among them, the following conditions can also be satisfied: 3.2 < TGfGr / Tfr1. Among them, the following conditions can also be satisfied: 4.0 < TGfGr / Tfr1. Among them, the following conditions can also be satisfied: TGfGr / Tfr1 < 50; thereby, the lens group configuration can be adjusted to avoid occupying too large a volume. Among them, the following conditions can also be satisfied: TGfGr / Tfr1 < 35. Among them, the following conditions can also be satisfied: TGfGr / Tfr1 < 25. Among them, the following conditions can also be satisfied: TGfGr / Tfr1 < 15. Among them, the following conditions can also be satisfied: 2.4 < TGfGr / Tfr1 < 50. Among them, the following conditions can also be satisfied: 3.2 < TGfGr / Tfr1 < 35. Please refer to Figure 24 and Figure 25 , where Figure 24 showing a schematic diagram of parameters TGfGr and Tfr1 in the first embodiment of the present invention, and Figure 25A schematic diagram showing the parameters TGfGr_1, TGfGr_2, and Tfr1 according to the first embodiment of the present invention. As Figure 25 shown in the first embodiment of the present invention, when the imaging lens system is in the second optical path state, the distance between the image-side surface of the first lens counted from the image side of the second front lens group Gf2 (the image-side surface of the first lens Lf21 of the second front group) and the reflecting surface E2S of the mirror E2 (reflective element) on the optical axis is TGfGr_1, and the distance between the reflecting surface E2S of the mirror E2 and the object-side surface of the first lens counted from the object side of the rear lens group Gr (the object-side surface of the first lens Lr1 of the rear group) on the optical axis is TGfGr_2. Among them, the parameter TGfGr is the sum of TGfGr_1 and TGfGr_2 when the imaging lens system is in the second optical path state (i.e., TGfGr = TGfGr_1 + TGfGr_2).

[0132] The distance between the object-side surface of the first lens counted from the object side of the front lens group and the image-side surface of the first lens counted from the image side of the front lens group on the optical axis is TGf, and the distance between the image-side surface of the first lens counted from the object side of the front lens group and the object-side surface of the second lens counted from the object side of the front lens group on the optical axis is Tff1ff2, which can satisfy the following conditions: 1.2 < TGf / Tff1ff2 < 3.0. Thereby, the lens distribution of the front lens group can be adjusted, which helps to improve the image quality and is beneficial to the setting of the reflective element. Among them, the following conditions can also be satisfied: 1.5 < TGf / Tff1ff2 < 2.4. Please refer to Figure 24 , a schematic diagram showing the parameters TGf_1, TGf_2, Tff1ff2_1, and Tff1ff2_2 according to the first embodiment of the present invention. As Figure 24In the first embodiment of the present invention, when the imaging lens system is in the first optical path state, for the first front lens group Gf1, the distance between the object side surface of the first lens counted from the object side (the object side surface of the first lens Lf11 in the first front group) and the reflecting surface E1S of the prism E1 (reflective element) on the optical axis is TGf_1, the distance between the reflecting surface E1S of the prism E1 and the image side surface of the first lens counted from the image side of the first front lens group Gf1 (the image side surface of the fourth lens Lf14 in the first front group) on the optical axis is TGf_2, the distance between the image side surface of the first lens counted from the object side of the first front lens group Gf1 (the image side surface of the first lens Lf11 in the first front group) and the reflecting surface E1S of the prism E1 on the optical axis is Tff1ff2_1, and the distance between the reflecting surface E1S of the prism E1 and the object side surface of the second lens counted from the object side of the first front lens group Gf1 (the object side surface of the second lens Lf12 in the first front group) on the optical axis is Tff1ff2_2. Among them, the aforementioned parameter TGf is the sum of TGf_1 and TGf_2 when the imaging lens system is in the first optical path state (i.e., TGf = TGf_1 + TGf_2), and the parameter Tff1ff2 is the sum of Tff1ff2_1 and Tff1ff2_2 when the imaging lens system is in the first optical path state (i.e., Tff1ff2 = Tff1ff2_1 + Tff1ff2_2).

[0133] The distance between the object side surface of the first lens counted from the object side of the front lens group and the imaging surface on the optical axis is TL, and the focal length of the imaging lens system is F, which can satisfy the following condition: 0.80 < TL / F < 2.0. Thereby, a balance can be achieved between the total length and the viewing angle. Among them, the following condition can also be satisfied: 1.1 < TL / F < 1.7. Please refer to Figure 24 and Figure 25 , both of which show schematic diagrams of the parameters TL_1 and TL_2 in the first embodiment of the present invention. As Figure 24 In the first embodiment of the present invention, when the imaging lens system is in the first optical path state, the distance between the object side surface of the first lens counted from the object side of the first front lens group Gf1 (the object side surface of the first lens Lf11 in the first front group) and the reflecting surface E1S of the prism E1 on the optical axis is TL_1, and the distance between the reflecting surface E1S of the prism E1 and the imaging surface IMG on the optical axis is TL_2. Among them, the aforementioned parameter TL is the sum of TL_1 and TL_2 when the imaging lens system is in the first optical path state (i.e., TL = TL_1 + TL_2). As Figure 25In the first embodiment of the present invention, when the imaging lens system is in the second optical path state, for the first lens counted from the object side in the second front lens group Gf2, the distance between its object-side surface (the object-side surface of the first lens Lf21 in the second front group) and the reflecting surface E2S of the mirror E2 on the optical axis is TL_1, and the distance between the reflecting surface E2S of the mirror E2 and the imaging surface IMG on the optical axis is TL_2. Among them, the aforementioned parameter TL is the sum of TL_1 and TL_2 when the imaging lens system is in the second optical path state (i.e., TL = TL_1 + TL_2).

[0134] The focal length of the first lens counted from the object side in the rear lens group is Frf1, the focal length of the second lens counted from the object side in the rear lens group is Frf2, the focal length of the second lens counted from the image side in the rear lens group is Frr2, and the focal length of the first lens counted from the image side in the rear lens group is Frr1, which can satisfy the following conditions: -2.0 < (Frf2 + Frr1) / (Frf1 + Frr2) < -0.50. Thereby, the refractive power configuration of the rear lens group can be adjusted, which helps to correct aberration and compress the length of the rear lens group. Among them, the following conditions can also be satisfied: -1.6 < (Frf2 + Frr1) / (Frf1 + Frr2) < -0.75. Among them, the following conditions can also be satisfied: -1.4 < (Frf2 + Frr1) / (Frf1 + Frr2) < -0.95.

[0135] The F-number of the imaging lens system is Fno, which can satisfy the following conditions: 2.0 < Fno < 5.0. Thereby, a balance can be achieved between illuminance and depth of field.

[0136] Half of the maximum viewing angle in the imaging lens system is HFOV, which can satisfy the following conditions: 3.0 degrees < HFOV < 18.0 degrees. Thereby, the imaging lens system can have telescopic characteristics. Among them, the following conditions can also be satisfied: 5.0 degrees < HFOV < 15.0 degrees.

[0137] The maximum effective radius of the object-side surface of the first lens counted from the object side in the front lens group is Yff1f, and the maximum effective radius of the image-side surface of the first lens counted from the image side in the front lens group is Yfr1r, which can satisfy the following conditions: 0.80 < Yff1f / Yfr1r < 1.2. Thereby, the traveling direction of light can be adjusted, which helps to compress the outer diameter of the front lens group. Please refer to Figure 24 and Figure 25 , both of which show schematic diagrams of the parameters Yff1f and Yfr1r in the first embodiment of the present invention.

[0138] The first lens of the front lens group counted from the object side has a maximum effective radius of Yff1f on its object-side surface, and the first lens of the rear lens group counted from the image side has a maximum effective radius of Yrr1r on its image-side surface, which can satisfy the following condition: 0.70 < Yff1f / Yrr1r < 1.4. Thereby, the traveling direction of light can be adjusted, which helps to achieve a balance among the viewing angle, the size of the imaging surface, and the volume distribution. Please refer to Figure 24 , a schematic diagram showing the parameter Yrr1r in the first embodiment of the present invention is illustrated.

[0139] The first lens of the rear lens group counted from the object side has a maximum effective radius of Yrf1f on its object-side surface, and the first lens of the rear lens group counted from the image side has a maximum effective radius of Yrr1r on its image-side surface, which can satisfy the following condition: 0.70 < Yrf1f / Yrr1r < 1.4. Thereby, the traveling direction of light can be adjusted, which helps to compress the outer diameter of the rear lens group. Please refer to Figure 24 , a schematic diagram showing the parameters Yrf1f and Yrr1r in the first embodiment of the present invention is illustrated.

[0140] The focal length of the first lens of the front lens group counted from the object side is Fff1, and the thickness of the first lens of the front lens group on the optical axis counted from the object side is Tff1, which can satisfy the following condition: 0 < Fff1 / Tff1 < 35.0. Thereby, the surface shape and refractive power of the first lens of the front lens group counted from the object side can be adjusted, which helps to compress the volume of the front lens group. Among them, the following condition can also be satisfied: 10.0 < Fff1 / Tff1 < 25.0. Please refer to Figure 24 and Figure 25 , schematic diagrams showing the parameter Tff1 in the first embodiment of the present invention are both illustrated.

[0141] The focal length of the first lens of the front lens group counted from the image side is Ffr1, and the focal length of the second lens of the front lens group counted from the image side is Ffr2, which can satisfy the following condition: -2.0 < Ffr1 / Ffr2 < -1.0. Thereby, the refractive powers of the lenses in the front lens group can be coordinated with each other to correct aberration. Among them, the following condition can also be satisfied: -1.7 < Ffr1 / Ffr2 < -1.3.

[0142] The Abbe number of the first lens of the rear lens group counted from the object side is Vrf1, the Abbe number of the second lens of the rear lens group counted from the object side is Vrf2, the Abbe number of the second lens of the rear lens group counted from the image side is Vrr2, and the Abbe number of the first lens of the rear lens group counted from the image side is Vrr1, which can satisfy the following condition: 1.8 < (Vrf1 + Vrr1) / (Vrf2 + Vrr2) < 6.0. Thereby, the material configuration of the rear lens group can be adjusted, which helps to correct aberrations such as chromatic aberration. Among them, the following condition can also be satisfied: 2.1 < (Vrf1 + Vrr1) / (Vrf2 + Vrr2) < 4.5.

[0143] The focal length of the front lens group is FGf, and the focal length of the rear lens group is FGr, which can satisfy the following conditions: 0 < FGf / |FGr| < 0.90. Thereby, the front lens group and the rear lens group can cooperate with each other, which helps to adjust the volume distribution and correct the aberration. Among them, the following conditions can also be satisfied: 0 < FGf / |FGr| < 0.70. Among them, the following conditions can also be satisfied: 0 < FGf / |FGr| < 0.50. The focal length of the lens group refers to the combined focal length of all the lenses in the lens group.

[0144] The entrance pupil diameter of the image capture lens system group is EPD. For the first lens counted from the object side in the front lens group, the maximum effective radius of its object side surface is Yff1f, which can satisfy the following conditions: 1.8 < EPD / Yff1f < 2.2. Thereby, a balance can be achieved between increasing the aperture and compressing the outer diameter of the lens.

[0145] For the first lens counted from the object side in the front lens group, the maximum effective radius of its object side surface is Yff1f, and the maximum imaging height of the image capture lens system group is ImgH (which can be half of the total diagonal length of the effective sensing area of the electronic photosensitive element), which can satisfy the following conditions: 0.70 < Yff1f / ImgH < 1.4. Thereby, a balance can be achieved between compressing the outer diameter of the lens and increasing the imaging surface, and it helps to adjust the viewing angle. Please refer to Figure 24 Figure showing the schematic diagram of the parameters Yff1f and ImgH in the first embodiment of the present invention.

[0146] The maximum value of the maximum effective radius among all the lens surfaces of the image capture lens system group is Ymax, and the minimum value of the maximum effective radius among all the lens surfaces of the image capture lens system group is Ymin, which can satisfy the following conditions: 1.0 < Ymax / Ymin < 1.5. Thereby, it helps to compress the outer diameter of the image capture lens system group and adjust the viewing angle.

[0147] The minimum Abbe number among all the lenses in the rear lens group is minVGr, which can satisfy the following conditions: 8.0 < minVGr < 26.5. Thereby, the material distribution of the rear lens group can be adjusted, which helps to correct the chromatic aberration. Among them, the following conditions can also be satisfied: 10.0 < minVGr < 23.0. Among them, the following conditions can also be satisfied: 12.0 < minVGr < 20.0.

[0148] When the imaging lens system group is in the first optical path state, its focal length is FS1, and when it is in the second optical path state, its focal length is FS2, which can meet the following conditions: 1.2 < FS1 / FS2; thereby, the focal lengths of the first optical path state and the second optical path state can be adjusted, which helps to increase the zoom ratio. Among them, the following conditions can also be met: 1.4 < FS1 / FS2 < 5.5; thereby, it can be avoided that the volume is too large due to too large zoom ratio. Among them, the following conditions can also be met: 1.6 < FS1 / FS2 < 4.3. Among them, the following conditions can also be met: 1.8 < FS1 / FS2 < 3.1.

[0149] The focal length of the first front lens group is FGf1, and the focal length of the second front lens group is FGf2, which can meet the following conditions: 1.2 < FGf1 / FGf2 < 2.0. Thereby, the focal lengths of the first front lens group and the second front lens group can be adjusted, which helps to balance between the zoom ratio and the occupied volume.

[0150] Each technical feature in the imaging lens system group disclosed in the present invention can be combined and configured to achieve the corresponding effects.

[0151] In the imaging lens system group disclosed in the present invention, the material of the lens can be glass or plastic. If the material of the lens is glass, the degree of freedom of the refractive power configuration of the imaging lens system group can be increased, and the influence of the external environmental temperature change on imaging can be reduced, and the glass lens can be made by techniques such as grinding or molding. If the lens material is plastic, the production cost can be effectively reduced. In addition, a spherical surface or an aspherical surface (ASP) can be set on the lens surface. Among them, the spherical lens can reduce the manufacturing difficulty, and if an aspherical surface is set on the lens surface, more control variables can be obtained thereby to eliminate aberration, reduce the number of lenses, and effectively reduce the total length of the imaging lens system group of the present invention. Further, the aspherical surface can be made by methods such as plastic injection molding or molding of glass lenses.

[0152] In the imaging lens system group disclosed in the present invention, if the lens surface is an aspherical surface, it means that all or a part of the optically effective area of the lens surface is an aspherical surface.

[0153] In the image capturing lens system assembly disclosed in this invention, additives can be selectively added to any (or more) lens materials to produce light absorption or light interference effects, thereby changing the lens's transmittance for specific wavelengths of light and reducing stray light and color shift. For example, the additives may have the function of filtering out light in the 600 nm to 800 nm wavelength range to help reduce excess red or infrared light; or they may filter out light in the 350 nm to 450 nm wavelength range to reduce excess blue or ultraviolet light. Therefore, the additives can prevent specific wavelengths of light from interfering with imaging. Furthermore, the additives can be uniformly mixed into plastic and manufactured into lenses using injection molding technology. Additionally, the additives can also be deposited on the lens surface as a coating to provide the aforementioned effects.

[0154] In the image capturing lens system assembly disclosed in this invention, if the lens surface is convex and the position of the convex surface is not defined, it means that the convex surface can be located near the optical axis of the lens surface; if the lens surface is concave and the position of the concave surface is not defined, it means that the concave surface can be located near the optical axis of the lens surface. If the refractive power or focal length of the lens is not defined in its region, it means that the refractive power or focal length of the lens can be the refractive power or focal length of the lens near the optical axis.

[0155] In the image capturing lens system group disclosed in this invention, the critical point on the lens surface refers to the point of tangency on the tangent line between the plane perpendicular to the optical axis and the lens surface, and the critical point is not located on the optical axis.

[0156] In the image capturing lens system group disclosed in this invention, the imaging surface of the image capturing lens 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.

[0157] In the image capturing lens system assembly disclosed in this invention, one or more imaging correction elements (such as planar elements) can be selectively arranged between the lens closest to the imaging plane and the imaging plane in the imaging optical path to achieve the effect of correcting image curvature (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 near the imaging plane.

[0158] In the image capturing lens system assembly disclosed in this invention, at least one element with a deflecting optical path function, such as a prism or a mirror, can be selectively disposed between the subject and the imaging plane in the imaging optical path. This provides a higher degree of spatial flexibility in the spatial configuration of the image capturing lens system assembly, allowing the thinner and lighter electronic device to be independent of the overall optical length of the image capturing lens system assembly. For further explanation, please refer to... Figure 30 and Figure 31 ,in Figure 30 A schematic diagram illustrating an arrangement of an optical path reversing element according to the present invention in an image capturing lens system assembly is provided. Figure 31 A schematic diagram illustrating another configuration of an optical path deflection element according to the present invention within an image capturing lens system assembly is shown. For example... Figure 30 and Figure 31 As shown, the image capturing lens system assembly can travel along the optical path from the subject (not shown) to the imaging plane IMG, and sequentially includes a first optical axis OA1, an optical path deflection element LF, and a second optical axis OA2, wherein the optical path deflection element LF can be as follows: Figure 30 As shown, it is positioned between the lens group LG of the subject and the image capturing lens system assembly, or as... Figure 31 The image is positioned between the lens group LG and the imaging plane IMG in the image capturing lens system assembly. Please also refer to... Figure 32 A schematic diagram illustrating an arrangement of two optical path deflection elements in an image capturing lens system according to the present invention is shown, such as... Figure 32 As shown, the image capturing lens system assembly can also travel along the optical path from the subject (not shown) to the imaging plane IMG, and sequentially includes a first optical axis OA1, a first optical path reversing element LF1, a second optical axis OA2, a second optical path reversing element LF2, and a third optical axis OA3. The first optical path reversing element LF1 is positioned between the subject and the lens group LG of the image capturing lens system assembly, and the second optical path reversing element LF2 is positioned between the lens group LG of the image capturing lens system assembly and the imaging plane IMG. Furthermore, the direction of light travel along the first optical axis OA1 can be as follows: Figure 32 The direction shown is the same as the direction of light travel along the third optical axis OA3. The image capturing lens system assembly may also be optionally configured with more than three optical path deflection elements. This invention is not limited to the type, number, and position of the optical path deflection elements disclosed in the accompanying drawings.

[0159] The image capturing lens system assembly disclosed in this invention 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, which can be used to reduce stray light and help improve image quality.

[0160] In the image capturing lens system assembly disclosed in this invention, the aperture can be configured as a front aperture or a central aperture. A front aperture means the aperture is positioned between the subject and the first lens, while a central aperture means the aperture is positioned between the first lens and the imaging plane. A front aperture allows for a longer distance between the exit pupil and the imaging plane, resulting in a telecentric effect and increasing the efficiency of image reception by the CCD or CMOS sensor. A central aperture helps to expand the field of view of the image capturing lens system assembly.

[0161] This invention 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 masking 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 invention, allowing adjustment of image quality, such as depth of field or exposure speed, by changing the aperture value.

[0162] In the image capturing lens system assembly disclosed in this invention, 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 reversal element (such as a plane mirror, prism, etc.), the data on the optical axis are also calculated along the optical axis. In addition, "the i-th lens in the lens group from the object side" refers to "the i-th lens in the lens group, counted along the optical axis from the object side to the image side"; "the i-th lens in the lens group from the image side" refers to "the i-th lens in the lens group, counted along the optical axis from the image side to the object side". For example, in the second optical path state, the distance TGfGr on the optical axis between the image-side surface of the first lens in the front lens group (counted from the image side) and the object-side surface of the first lens in the rear lens group (counted from the object side) is... Figure 25 The sum of TGfGr_1 and TGfGr_2 (i.e., TGfGr = TGfGr_1 + TGfGr_2) is calculated along the optical axis. Similar data also include parameters such as TGf (distance on the optical axis between the object-side surface of the first lens and the image-side surface of the first lens in the front lens group, calculated from the object-side), Tff1ff2 (distance on the optical axis between the image-side surface of the first lens and the object-side surface of the second lens in the front lens group, calculated from the object-side), and TL (distance on the optical axis between the object-side surface of the first lens and the imaging plane, calculated from the object-side).

[0163] Based on the above implementation methods, specific embodiments are presented below and described in detail with reference to the accompanying drawings.

[0164] <First Embodiment>

[0165] Please refer to Figures 1 to 4 ,in Figure 1 A schematic diagram illustrating the image capturing lens system assembly of the image capturing device according to the first embodiment of the present invention in the first optical path state is shown. Figure 2 A schematic diagram illustrating the image capturing lens system assembly of the image capturing device according to the first embodiment of the present invention in the second optical path state is shown. Figure 3 From left to right, the images are plots showing the spherical aberration, astigmatism, and distortion curves of the image capturing lens system assembly of the first embodiment in the first optical path state. Figure 4 From left to right, the images shown are the spherical aberration, astigmatism, and distortion curves of the image capturing lens system assembly of the first embodiment in the second optical path state. Figure 1 and Figure 2 It is known that the image capturing device 1 includes an image capturing lens system assembly (not otherwise labeled) and an electronic photosensitive element IS. The image capturing lens system assembly includes a first front lens group Gf1, a second front lens group Gf2, a rear lens group Gr, and an optical path switching structure, wherein the optical path switching structure is used to allow the image capturing lens system assembly to switch between a first optical path state and a second optical path state. Figure 1 As shown, when the image capturing lens system is in the first optical path state, the image capturing lens system includes a first front lens group Gf1 and a rear lens group Gr sequentially from the object side to the image side along the first optical path. Figure 2 As shown, when the image capturing lens system is in the second optical path state, the image capturing lens system includes a second front lens group Gf2 and a rear lens group Gr sequentially from the object side to the image side along the second optical path. The first front lens group Gf1 includes four lenses, which are, sequentially from the object side to the image side along the first optical path, the first lens Lf11, the second lens Lf12, the third lens Lf13, and the fourth lens Lf14, and there are no other interposed lenses between each lens. The second front lens group Gf2 includes one lens, which is the first lens Lf21 of the second front lens group. The rear lens group Gr includes four lenses, which are, sequentially from the object side to the image side along the optical path, the first lens Lr1, the second lens Lr2, the third lens Lr3, and the fourth lens Lr4, and there are no other interposed lenses between each lens. Furthermore, the rear lens group Gr includes a movable lens subgroup Gm, which is movable along the optical axis when the image capturing lens system group switches between a first optical path state and a second optical path state. In this embodiment, the movable lens subgroup Gm includes a lens, which is the fourth lens Lr4 of the rear group, and the movable lens subgroup Gm has negative refractive power. Figure 1 and Figure 2It can be seen that when the image capturing lens system group switches from the first optical path state to the second optical path state, the movable lens subgroup Gm moves along the optical axis toward the image side.

[0166] The image capturing lens system also includes an aperture ST1, a prism E1, an aperture stop S1, an aperture ST2, a filter element E3, and an imaging plane IMG. For example... Figure 1 As shown, when the image capturing lens system is in the first optical path state, the image capturing lens system, along the first optical path from the object side to the image side, sequentially includes an aperture ST1, a first front group first lens Lf11, a prism E1, a first front group second lens Lf12, a first front group third lens Lf13, an aperture stop S1, a first front group fourth lens Lf14, a rear group first lens Lr1, a rear group second lens Lr2, a rear group third lens Lr3, a rear group fourth lens Lr4, a filter element E3, and an imaging plane IMG. Figure 2 As shown, when the image capturing lens system is in the second optical path state, the image capturing lens system includes, in sequence from the object side to the image side along the second optical path, an aperture ST2, a first lens Lf21 of the second front group, a first lens Lr1 of the rear group, a second lens Lr2 of the rear group, a third lens Lr3 of the rear group, a fourth lens Lr4 of the rear group, a filter element E3, and an imaging surface IMG. The electronic photosensitive element IS is disposed on the imaging surface IMG.

[0167] To clearly illustrate the optical path of the image capturing device, Figure 1 and Figure 2 Although the bending of the light path is not shown, it can be understood that the light path of the image capturing device 1 can be bent by reflective elements (such as prism E1, mirror E2, mirror E2b, and prism E2c). Prism E1 reflects the incident light, causing the first light path to bend at the position of prism E1, and mirror E2 reflects the incident light, causing the second light path to bend at the position of mirror E2. Figures 5 to 8 As shown. Among them, Figure 5 A schematic diagram illustrating the first optical path being deflected by a reflective element in an image-capturing device according to a first embodiment of the present invention is shown, as follows: Figure 5 As shown, prism E1 is made of glass and has a reflective surface E1S. Prism E1 is disposed in the first front lens group Gf1, and the first optical path is deflected by the reflective surface E1S of prism E1. Figure 6 A schematic diagram illustrating the second optical path being deflected by a reflective element in the imaging device according to the first embodiment of the present invention is shown, as follows: Figure 6 As shown, reflector E2 is a plane mirror with a reflecting surface E2S. Reflector E2 is positioned between the second front lens group Gf2 and the rear lens group Gr, and the second optical path is deflected by the reflecting surface E2S of reflector E2. Figure 7A schematic diagram illustrating another embodiment of the imaging device according to the first embodiment of the present invention, in which the second optical path is deflected by a reflective element, is shown below. Figure 7 As shown, mirror E2b is a plane mirror with a reflective surface. Mirror E2 is positioned on the object side of the second front lens group Gf2, and the second optical path is deflected by the reflective surface of mirror E2b. Figure 8 A schematic diagram illustrating another embodiment of the imaging device according to the first embodiment of the present invention, in which the second optical path is deflected by a reflective element, is shown below. Figure 8 As shown, prism E2c has a reflective surface and is positioned on the object side of the second front lens group Gf2. The second optical path is deflected by the reflective surface of prism E2c. The types, quantities, and configurations of the components involved in the optical path deflection can be adjusted according to actual needs, and this invention is not limited thereto.

[0168] The optical path switching structure configuration of this embodiment may, for example, have a similar configuration. Figures 26 to 29 The optical path switching structure may include at least one reflective element (such as mirror E2, mirror E2b, or prism E2c) that can move or rotate relative to the first front lens group Gf1, the second front lens group Gf2, or the rear lens group Gr. For example, in Figure 6 In the embodiment, the optical path switching structure includes a reflector E2, which is a plane mirror with a reflecting surface E2S and can move or rotate relative to the first front lens group Gf1, the second front lens group Gf2, the rear lens group Gr, or the electronic photosensitive element IS. Thus, the optical path switching structure can switch the image capturing lens system group between a first optical path state and a second optical path state by moving or rotating the reflector E2. For example... Figure 6 As shown, when the image capturing lens system is in the second optical path state, the reflector E2 of the optical path switching structure is located between the second front lens group Gf2 and the rear lens group Gr in the second optical path, wherein the second optical path is deflected by the reflector E2. Specifically, the optical path switching structure can move or rotate the reflector E2 to position it between the second front lens group Gf2 and the rear lens group Gr in the second optical path, thereby switching the image capturing lens system from the first optical path state to the second optical path state. Alternatively, the reflector E2 can be moved out of the space between the second front lens group Gf2 and the rear lens group Gr by moving or rotating the reflector E2, thereby switching the image capturing lens system from the second optical path state to the first optical path state.

[0169] For example, in Figure 7In the embodiment, the optical path switching structure includes a reflector E2b and a second front lens group Gf2. The reflector E2b is located on the object side of the second front lens group Gf2 in the second optical path, and is a plane mirror with a reflective surface. The reflector E2b and the second front lens group Gf2 of the optical path switching structure can move or rotate relative to the first front lens group Gf1, the rear lens group Gr, and the electronic photosensitive element IS. Therefore, the optical path switching structure can switch the image capturing lens system assembly between a first optical path state and a second optical path state by moving or rotating the reflector E2b and the second front lens group Gf2. Specifically, the optical path switching structure can move or rotate the reflector E2b and the second front lens group Gf2 so that the reflector E2b and the second front lens group Gf2 are positioned between the first front lens group Gf1 and the rear lens group Gr, thereby switching the image capturing lens system group from the first optical path state to the second optical path state. Alternatively, the reflector E2b and the second front lens group Gf2 can be moved out from between the first front lens group Gf1 and the rear lens group Gr by moving or rotating the reflector E2b and the second front lens group Gf2, thereby switching the image capturing lens system group from the second optical path state to the first optical path state. Figure 8 The optical path switching structure is similar to Figure 7 The optical path switching structure differs mainly in Figure 8 The reflective element (prism E2c) of the optical path switching structure and Figure 7 The reflective element (mirror E2b) of the optical path switching structure differs from that of the other type. Specifically, the optical path switching structure includes a prism E2c and a second front lens group Gf2, wherein the prism E2c is located on the object side of the second front lens group Gf2 in the second optical path, and the prism E2c is a prism with a reflective surface. The prism E2c and the second front lens group Gf2 of the optical path switching structure can move or rotate relative to the first front lens group Gf1, the rear lens group Gr, and the electronic photosensitive element IS. Thus, the optical path switching structure can switch the image capturing lens system assembly between a first optical path state and a second optical path state by moving or rotating the prism E2c and the second front lens group Gf2. The types, quantities, and configurations of the elements included in the optical path switching structure can be adjusted according to actual needs, and this invention is not limited thereto.

[0170] The first lens Lf11 of the first front group 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.

[0171] The second lens Lf12 of the first front group 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.

[0172] The third lens Lf13 of the first front group 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.

[0173] The fourth lens of the first front group, Lf14, 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.

[0174] The first lens Lf21 of the second front group 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 flat near the optical axis. Both of its surfaces are aspherical.

[0175] The first lens Lr1 in the rear group 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.

[0176] The second lens Lr2 in the rear group 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.

[0177] The third lens Lr3 in the rear group 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.

[0178] The fourth lens in the rear group, Lr4, 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, and its object-side surface has a critical point off-axis.

[0179] The filter element E3 is made of glass and is located between the fourth lens Lr4 in the rear group and the imaging plane IMG. It does not affect the focal length of the image capturing lens system group.

[0180] The equations for the aspherical surfaces of the above lenses are expressed as follows:

[0181]

[0182] 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;

[0183] Y: The perpendicular distance between a point on the aspherical curve and the optical axis;

[0184] R: Radius of curvature;

[0185] k: cone coefficient; and

[0186] Ai: The i-th order aspherical coefficient.

[0187] In the image capturing lens system assembly of the first embodiment, the focal length of the image capturing lens system assembly is F, the focal length of the front lens group (referring to the first front lens group Gf1 or the second front lens group Gf2) is FGf, the focal length of the rear lens group Gr is FGr, the aperture value of the image capturing lens system assembly is Fno, and half of the maximum angle of view in the image capturing lens system assembly is HFOV. The values ​​of the optical parameters of the image capturing lens system assembly may differ in different optical path states. Among them, when the image capturing lens system assembly is in the first optical path state, the values ​​of the above optical parameters are as follows: F = 24.69 mm, FGf = 28.97 mm, FGr = 102.09 mm, Fno = 3.51, HFOV = 6.8 degrees. When the image capturing lens system is in the second optical path state, the values ​​of the above optical parameters are as follows: F = 12.23 mm, FGf = 17.11 mm, FGr = 45.58 mm, Fno = 2.45, HFOV = 13.5 degrees.

[0188] In the following description, "front lens group" refers to the first front lens group Gf1 when the image capturing lens system is in the first optical path state, and to the second front lens group Gf2 when the image capturing lens system is in the second optical path state. Furthermore, "optical path" refers to the first optical path when the image capturing lens system is in the first optical path state, and to the second optical path when the image capturing lens system is in the second optical path state.

[0189] The distance on the optical axis between the object-side surface of the first lens in the front lens group (counted from the object side) and the image-side surface of the first lens in the front lens group (counted from the image side) is TGf. When the image capturing lens system is in the first optical path state, the distance on the optical axis between the object-side surface of the first lens Lf11 in the first front group and the image-side surface of the fourth lens Lf14 in the first front group is TGf, which satisfies the following condition: TGf = 12.526 mm. When the image capturing lens system is in the second optical path state, the distance on the optical axis between the object-side surface of the first lens Lf21 in the second front group and the image-side surface of the first lens Lf21 in the second front group is TGf, which satisfies the following condition: TGf = 0.804 mm.

[0190] The distance on the optical axis between the object-side surface of the first lens in the rear lens group (Gr, from the object-side number) and the image-side surface of the first lens in the rear lens group (Gr, from the image-side number) is TGr. When the image capturing lens system is in the first optical path state, the distance on the optical axis between the object-side surface of the first lens Lr1 and the image-side surface of the fourth lens Lr4 in the rear lens group is TGr, which satisfies the following condition: TGr = 6.218 mm. When the image capturing lens system is in the second optical path state, the distance on the optical axis between the object-side surface of the first lens Lr1 and the image-side surface of the fourth lens Lr4 in the rear lens group is TGr, which satisfies the following condition: TGr = 7.273 mm.

[0191] The distance on the optical axis between the image-side surface of the first lens in the front lens group (numbered from the image side) and the object-side surface of the first lens in the rear lens group (numbered from the object side) is TGfGr. When the image capturing lens system is in the first optical path state, the distance on the optical axis between the image-side surface of the fourth lens Lf14 in the first front group and the object-side surface of the first lens Lr1 in the rear group is TGfGr, which satisfies the following condition: TGfGr = 11.454 mm. When the image capturing lens system is in the second optical path state, the distance on the optical axis between the image-side surface of the first lens Lf21 in the second front group and the object-side surface of the first lens Lr1 in the rear group is TGfGr, which satisfies the following condition: TGfGr = 5.959 mm.

[0192] The distance on the optical axis between the image-side surface of the first lens in the front lens group (counted from the object side) and the object-side surface of the second lens in the front lens group (counted from the object side) is Tff1ff2. When the image capturing lens system is in the first optical path state, the distance on the optical axis between the object-side surface of the first lens Lf11 in the first front group and the image-side surface of the fourth lens Lf14 in the first front group is TGf, and the distance on the optical axis between the image-side surface of the first lens Lf11 in the first front group and the object-side surface of the second lens Lf12 in the first front group is Tff1ff2, which satisfies the following condition: TGf / Tff1ff2=1.83.

[0193] The thickness of the first lens in the front lens group on the optical axis is Tfr1, determined by the image-side number. When the image capturing lens system is in the first optical path state, the distance on the optical axis between the image-side surface of the fourth lens Lf14 in the first front group and the object-side surface of the first lens Lr1 in the rear group is TGfGr, and the thickness of the fourth lens Lf14 in the first front group on the optical axis is Tfr1, satisfying the following condition: TGfGr / Tfr1 = 9.28. When the image capturing lens system is in the second optical path state, the distance on the optical axis between the image-side surface of the first lens Lf21 in the second front group and the object-side surface of the first lens Lr1 in the rear group is TGfGr, and the thickness of the first lens Lf21 in the second front group on the optical axis is Tfr1, satisfying the following condition: TGfGr / Tfr1 = 7.41.

[0194] The distance between the object-side surface of the first lens in the front lens group and the imaging plane IMG on the optical axis is TL. When the image capturing lens system is in the first optical path state, the distance between the object-side surface of the first lens Lf11 in the first front group and the imaging plane IMG on the optical axis is TL, and the focal length of the image capturing lens system is F, which satisfies the following condition: TL / F = 1.37. When the image capturing lens system is in the second optical path state, the distance between the object-side surface of the first lens Lf21 in the second front group and the imaging plane IMG on the optical axis is TL, and the focal length of the image capturing lens system is F, which satisfies the following condition: TL / F = 1.35.

[0195] The focal length of the first lens in the front lens group, measured from the object side, is Fff1, and its thickness along the optical axis, measured from the object side, is Tff1. When the image capturing lens system is in the first optical path state, the focal length of the first lens Lf11 in the first front group is Fff1, and its thickness along the optical axis is Tff1, satisfying the following condition: Fff1 / Tff1 = 18.92. When the image capturing lens system is in the second optical path state, the focal length of the first lens Lf21 in the second front group is Fff1, and its thickness along the optical axis is Tff1, satisfying the following condition: Fff1 / Tff1 = 21.28.

[0196] The focal length of the first lens in the front lens group, counting from the image side, is Ffr1, and the focal length of the second lens in the front lens group, counting from the image side, is Ffr2. When the image capturing lens system is in the first optical path state, the focal length of the fourth lens Lf14 in the first front group is Ffr1, and the focal length of the third lens Lf13 in the first front group is Ffr2, which satisfies the following condition: Ffr1 / Ffr2=-1.42.

[0197] When the image capturing lens system is in the first optical path state, the focal length of the first front lens group Gf1 is FGf, and the focal length of the rear lens group Gr is FGr, satisfying the following condition: FGf / |FGr|=0.28. When the image capturing lens system is in the second optical path state, the focal length of the second front lens group Gf2 is FGf, and the focal length of the rear lens group Gr is FGr, satisfying the following condition: FGf / |FGr|=0.38.

[0198] The entrance pupil diameter of the image capturing lens system is EPD. The maximum effective radius of the object-side surface of the first lens in the front lens group (by object-side number) is Yff1f. When the image capturing lens system is in the first optical path state, the entrance pupil diameter is EPD, and the maximum effective radius of the object-side surface of the first lens Lf11 in the first front group is Yff1f, satisfying the following condition: EPD / Yff1f = 2.00. When the image capturing lens system is in the second optical path state, the entrance pupil diameter is EPD, and the maximum effective radius of the object-side surface of the first lens Lf21 in the second front group is Yff1f, satisfying the following condition: EPD / Yff1f = 2.00.

[0199] The maximum imaging height of the image capturing lens system assembly is ImgH. When the image capturing lens system assembly is in the first optical path state, the maximum effective radius of the object-side surface of the first lens Lf11 of the first front group is Yff1f, and the maximum imaging height of the image capturing lens system assembly is ImgH, which satisfies the following condition: Yff1f / ImgH = 1.20. When the image capturing lens system assembly is in the second optical path state, the maximum effective radius of the object-side surface of the first lens Lf21 of the second front group is Yff1f, and the maximum imaging height of the image capturing lens system assembly is ImgH, which satisfies the following condition: Yff1f / ImgH = 0.85.

[0200] The first lens in the front lens group has a maximum effective radius of Yfr1r on its image-side surface, determined by the number of lenses on the image side. When the image capturing lens system is in the first optical path state, the maximum effective radius of the object-side surface of the first lens Lf11 in the first front group is Yff1f, and the maximum effective radius of the image-side surface of the fourth lens Lf14 in the first front group is Yfr1r, satisfying the following condition: Yff1f / Yfr1r = 1.07. When the image capturing lens system is in the second optical path state, the maximum effective radius of the object-side surface of the first lens Lf21 in the second front group is Yff1f, and the maximum effective radius of the image-side surface of the first lens Lf21 in the second front group is Yfr1r, satisfying the following condition: Yff1f / Yfr1r = 0.98.

[0201] The maximum effective radius of the image-side surface of the first lens in the rear lens group Gr, determined by the image-side number, is Yrr1r. When the image capturing lens system is in the first optical path state, the maximum effective radius of the object-side surface of the first lens Lf11 in the first front group is Yff1f, and the maximum effective radius of the image-side surface of the fourth lens Lr4 in the rear group is Yrr1r, satisfying the following condition: Yff1f / Yrr1r = 1.20. When the image capturing lens system is in the second optical path state, the maximum effective radius of the object-side surface of the first lens Lf21 in the second front group is Yff1f, and the maximum effective radius of the image-side surface of the fourth lens Lr4 in the rear group is Yrr1r, satisfying the following condition: Yff1f / Yrr1r = 0.91.

[0202] The maximum effective radius of the object-side surface of the first lens in the rear lens group Gr is Yrf1f, determined by the object-side number. When the image capturing lens system is in the first optical path state, the maximum effective radius of the object-side surface of the first lens Lr1 in the rear group is Yrf1f, and the maximum effective radius of the image-side surface of the fourth lens Lr4 in the rear group is Yrr1r, satisfying the following condition: Yrf1f / Yrr1r = 1.19. When the image capturing lens system is in the second optical path state, the maximum effective radius of the object-side surface of the first lens Lr1 in the rear group is Yrf1f, and the maximum effective radius of the image-side surface of the fourth lens Lr4 in the rear group is Yrr1r, satisfying the following condition: Yrf1f / Yrr1r = 1.09.

[0203] The maximum effective radius among all lens surfaces in the image capturing lens system assembly is Ymax, and the minimum effective radius is Ymin. When the image capturing lens system assembly is in the first optical path state, it satisfies the following condition: Ymax / Ymin = 1.28. When the image capturing lens system assembly is in the second optical path state, it satisfies the following condition: Ymax / Ymin = 1.27.

[0204] The vertical distance between the critical point of the object-side surface of the first lens in the rear lens group Gr (based on the image-side number) and the optical axis is YCrr1f. The maximum effective radius of the object-side surface of the first lens in the rear lens group Gr (based on the image-side number) is Yrr1f. When the image capturing lens system is in the first optical path state, the vertical distance between the critical point of the object-side surface of the fourth lens Lr4 in the rear group (based on the image-side number) and the optical axis is YCrr1f. The maximum effective radius of the object-side surface of the fourth lens Lr4 in the rear group is Yrr1f, which satisfies the following condition: YCrr1f / Yrr1f = 0.63. When the image capturing lens system is in the second optical path state, the vertical distance between the critical point of the object-side surface of the fourth lens Lr4 in the rear group (based on the image-side number) and the optical axis is YCrr1f. The maximum effective radius of the object-side surface of the fourth lens Lr4 in the rear group is Yrr1f, which satisfies the following condition: YCrr1f / Yrr1f = 0.68.

[0205] The Abbe number of the first lens in the rear lens group Gr, measured from the object side, is Vrf1; the Abbe number of the second lens in the rear lens group Gr, measured from the object side, is Vrf2; the Abbe number of the second lens in the rear lens group Gr, measured from the image side, is Vrr2; and the Abbe number of the first lens in the rear lens group Gr, measured from the image side, is Vrr1. In this embodiment, the Abbe number of the first lens Lr1 in the rear group is Vrf1, the Abbe number of the second lens Lr2 in the rear group is Vrf2, the Abbe number of the third lens Lr3 in the rear group is Vrr2, and the Abbe number of the fourth lens Lr4 in the rear group is Vrr1, which satisfies the following condition: (Vrf1 + Vrr1) / (Vrf2 + Vrr2) = 2.88.

[0206] The minimum Abbe number among all lenses in the rear lens group Gr is minVGr, which satisfies the following condition: minVGr = 19.5. In this embodiment, the Abbe number of the second lens Lr2 in the rear group is the same as that of the third lens Lr3 in the rear group and is less than the Abbe number of the other lenses in the rear lens group Gr. Therefore, minVGr is equal to the Abbe number of the second lens Lr2 in the rear group and equal to the Abbe number of the third lens Lr3 in the rear group.

[0207] In this embodiment, the Abbe number of the third lens Lr3 in the rear group is Vrr2, and the Abbe number of the fourth lens Lr4 in the rear group is Vrr1, which satisfies the following condition: Vrr1 / Vrr2=2.88.

[0208] The focal length of the first lens in the rear lens group Gr, measured from the object side, is Frf1; the focal length of the second lens in the rear lens group Gr, measured from the object side, is Frf2; the focal length of the second lens in the rear lens group Gr, measured from the image side, is Frr2; and the focal length of the first lens in the rear lens group Gr, measured from the image side, is Frr1. In this embodiment, the focal length of the first lens Lr1 in the rear group is Frf1, the focal length of the second lens Lr2 in the rear group is Frf2, the focal length of the third lens Lr3 in the rear group is Frr2, and the focal length of the fourth lens Lr4 in the rear group is Frr1, which satisfies the following condition: (Frf2+Frr1) / (Frf1+Frr2)=-1.16.

[0209] The focal length of the movable lens subgroup Gm is FGm, and the thickness of the movable lens subgroup Gm on the optical axis is TGm, which satisfies the following condition: FGm / TGm=-19.16.

[0210] The focal length of the first front lens group Gf1 is FGf1, and the focal length of the second front lens group Gf2 is FGf2, which satisfies the following condition: FGf1 / FGf2=1.69.

[0211] The focal length of the image capturing lens system group in the first optical path state is FS1, and the focal length of the image capturing lens system group in the second optical path state is FS2, which satisfies the following condition: FS1 / FS2 = 2.02.

[0212] Please refer to Table 1, Table 2, and Table 3 below.

[0213]

[0214]

[0215]

[0216]

[0217]

[0218] Table 1 shows detailed structural data of the image capturing lens system assembly in the first optical path state in the first embodiment. The units for radius of curvature, thickness, and focal length are millimeters (mm), and surfaces O-S0 to O-S3 sequentially represent the surfaces along the first optical path from the object side to the image side. Table 2 shows detailed structural data of the image capturing lens system assembly in the second optical path state in the first embodiment. The units for radius of curvature, thickness, and focal length are millimeters, and surfaces O-S0 to O-S3 sequentially represent the surfaces along the second optical path from the object side to the image side. Table 3 shows the aspherical data in the first embodiment, where k is the cone coefficient in the aspherical curve equation, and A4 to A22 represent the 4th to 22nd order aspherical coefficients of each surface. Furthermore, the tables in the following embodiments are corresponding schematic diagrams and aberration curves for each embodiment. The definitions of the data in the tables are the same as those in Tables 1, 2, and 3 of the first embodiment, and will not be repeated here.

[0219] <Second Embodiment>

[0220] Please refer to Figures 9 to 12 ,in Figure 9 A schematic diagram illustrating the image capturing lens system assembly of the image capturing device according to the second embodiment of the present invention in the first optical path state is shown. Figure 10 A schematic diagram illustrating the image capturing lens system assembly of the image capturing device according to the second embodiment of the present invention in the second optical path state is shown. Figure 11 From left to right, the images shown are the spherical aberration, astigmatism, and distortion curves of the image capturing lens system assembly of the second embodiment in the first optical path state. Figure 12 From left to right, the images shown are the spherical aberration, astigmatism, and distortion curves of the image capturing lens system assembly of the second embodiment in the second optical path state. Figure 9 and Figure 10 It is known that the image capturing device 2 includes an image capturing lens system assembly (not otherwise labeled) and an electronic photosensitive element IS. The image capturing lens system assembly includes a first front lens group Gf1, a second front lens group Gf2, a rear lens group Gr, and an optical path switching structure, wherein the optical path switching structure is used to allow the image capturing lens system assembly to switch between a first optical path state and a second optical path state. Figure 9 As shown, when the image capturing lens system is in the first optical path state, the image capturing lens system includes a first front lens group Gf1 and a rear lens group Gr sequentially from the object side to the image side along the first optical path. Figure 10As shown, when the image capturing lens system is in the second optical path state, the image capturing lens system includes a second front lens group Gf2 and a rear lens group Gr sequentially from the object side to the image side along the second optical path. The first front lens group Gf1 includes four lenses, which are, sequentially from the object side to the image side along the first optical path, the first lens Lf11, the second lens Lf12, the third lens Lf13, and the fourth lens Lf14, and there are no other interposed lenses between each lens. The second front lens group Gf2 includes one lens, which is the first lens Lf21 of the second front lens group. The rear lens group Gr includes four lenses, which are, sequentially from the object side to the image side along the optical path, the first lens Lr1, the second lens Lr2, the third lens Lr3, and the fourth lens Lr4, and there are no other interposed lenses between each lens. Furthermore, the rear lens group Gr includes a movable lens subgroup Gm, which is movable along the optical axis when the image capturing lens system group switches between a first optical path state and a second optical path state. In this embodiment, the movable lens subgroup Gm includes a lens, which is the fourth lens Lr4 of the rear group, and the movable lens subgroup Gm has negative refractive power. Figure 9 and Figure 10 It can be seen that when the image capturing lens system group switches from the first optical path state to the second optical path state, the movable lens subgroup Gm moves along the optical axis toward the image side.

[0221] The image capturing lens system also includes an aperture ST1, a prism E1, an aperture stop S1, an aperture ST2, a filter element E3, and an imaging plane IMG. For example... Figure 9 As shown, when the image capturing lens system is in the first optical path state, the image capturing lens system, along the first optical path from the object side to the image side, sequentially includes an aperture ST1, a first front group first lens Lf11, a prism E1, a first front group second lens Lf12, a first front group third lens Lf13, an aperture stop S1, a first front group fourth lens Lf14, a rear group first lens Lr1, a rear group second lens Lr2, a rear group third lens Lr3, a rear group fourth lens Lr4, a filter element E3, and an imaging plane IMG. Figure 10 As shown, when the image capturing lens system is in the second optical path state, the image capturing lens system includes, in sequence from the object side to the image side along the second optical path, an aperture ST2, a first lens Lf21 of the second front group, a first lens Lr1 of the rear group, a second lens Lr2 of the rear group, a third lens Lr3 of the rear group, a fourth lens Lr4 of the rear group, a filter element E3, and an imaging surface IMG. The electronic photosensitive element IS is disposed on the imaging surface IMG.

[0222] Prism E1 is made of glass and has a reflective surface. Prism E1 is disposed in the first front lens group Gf1, and the first optical path is deflected and redirected by the reflective surface of prism E1. To clearly illustrate the optical path of the image-collecting device, Figure 9 and Figure 10 The optical path is not shown being deflected by a reflective element (such as prism E1). However, it will be understood that the optical path deflection element configuration of the imaging device 2 in this embodiment may, for example, have the same configuration as in the first embodiment. Figures 5 to 8 Similarly, the optical path switching structure configuration of this embodiment can, for example, have a similar structure. Figures 26 to 29 The present invention is not limited to the structure described herein.

[0223] The first lens Lf11 of the first front group 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.

[0224] The second lens Lf12 of the first front group 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.

[0225] The third lens Lf13 of the first front group has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical.

[0226] The fourth lens of the first front group, Lf14, 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.

[0227] The first lens Lf21 of the second front group 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.

[0228] The first lens Lr1 in the rear group has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical.

[0229] The second lens Lr2 in the rear group 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.

[0230] The third lens Lr3 in the rear group 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.

[0231] The fourth lens in the rear group, Lr4, 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, and its object-side surface has a critical point off-axis.

[0232] The filter element E3 is made of glass and is located between the fourth lens Lr4 in the rear group and the imaging plane IMG. It does not affect the focal length of the image capturing lens system group.

[0233] Please refer to Tables 4, 5, and 6 below.

[0234]

[0235]

[0236]

[0237]

[0238]

[0239]

[0240] In the second embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in the table below are the same as in the first embodiment and will not be repeated here.

[0241]

[0242] <Third Embodiment>

[0243] Please refer to Figures 13 to 16 ,in Figure 13 A schematic diagram illustrating the image capturing lens system assembly of the image capturing device according to the third embodiment of the present invention in the first optical path state is shown. Figure 14 A schematic diagram illustrating the image capturing lens system assembly of the image capturing device according to the third embodiment of the present invention in the second optical path state is shown. Figure 15 From left to right, the images shown are the spherical aberration, astigmatism, and distortion curves of the image capturing lens system assembly of the third embodiment in the first optical path state. Figure 16 From left to right, the images shown are the spherical aberration, astigmatism, and distortion curves of the image capturing lens system assembly of the third embodiment in the second optical path state. Figure 13 and Figure 14 It is known that the image capturing device 3 includes an image capturing lens system assembly (not otherwise labeled) and an electronic photosensitive element IS. The image capturing lens system assembly includes a first front lens group Gf1, a second front lens group Gf2, a rear lens group Gr, and an optical path switching structure, wherein the optical path switching structure is used to allow the image capturing lens system assembly to switch between a first optical path state and a second optical path state. Figure 13 As shown, when the image capturing lens system is in the first optical path state, the image capturing lens system includes a first front lens group Gf1 and a rear lens group Gr sequentially from the object side to the image side along the first optical path. Figure 14As shown, when the image capturing lens system is in the second optical path state, the image capturing lens system includes a second front lens group Gf2 and a rear lens group Gr sequentially from the object side to the image side along the second optical path. The first front lens group Gf1 includes four lenses, which are, sequentially from the object side to the image side along the first optical path, the first lens Lf11, the second lens Lf12, the third lens Lf13, and the fourth lens Lf14, and there are no other interposed lenses between each lens. The second front lens group Gf2 includes one lens, which is the first lens Lf21 of the second front lens group. The rear lens group Gr includes four lenses, which are, sequentially from the object side to the image side along the optical path, the first lens Lr1, the second lens Lr2, the third lens Lr3, and the fourth lens Lr4, and there are no other interposed lenses between each lens. Furthermore, the rear lens group Gr includes a movable lens subgroup Gm, which is movable along the optical axis when the image capturing lens system group switches between a first optical path state and a second optical path state. In this embodiment, the movable lens subgroup Gm includes a lens, which is the fourth lens Lr4 of the rear group, and the movable lens subgroup Gm has negative refractive power. Figure 13 and Figure 14 It can be seen that when the image capturing lens system group switches from the first optical path state to the second optical path state, the movable lens subgroup Gm moves along the optical axis toward the image side.

[0244] The image capturing lens system also includes an aperture ST1, a prism E1, an aperture stop S1, an aperture ST2, a filter element E3, and an imaging plane IMG. For example... Figure 13 As shown, when the image capturing lens system is in the first optical path state, the image capturing lens system, along the first optical path from the object side to the image side, sequentially includes an aperture ST1, a first front group first lens Lf11, a prism E1, a first front group second lens Lf12, a first front group third lens Lf13, an aperture stop S1, a first front group fourth lens Lf14, a rear group first lens Lr1, a rear group second lens Lr2, a rear group third lens Lr3, a rear group fourth lens Lr4, a filter element E3, and an imaging plane IMG. Figure 14 As shown, when the image capturing lens system is in the second optical path state, the image capturing lens system includes, in sequence from the object side to the image side along the second optical path, an aperture ST2, a first lens Lf21 of the second front group, a first lens Lr1 of the rear group, a second lens Lr2 of the rear group, a third lens Lr3 of the rear group, a fourth lens Lr4 of the rear group, a filter element E3, and an imaging surface IMG. The electronic photosensitive element IS is disposed on the imaging surface IMG.

[0245] Prism E1 is made of glass and has a reflective surface. Prism E1 is disposed in the first front lens group Gf1, and the first optical path is deflected and redirected by the reflective surface of prism E1. To clearly illustrate the optical path of the image-collecting device, Figure 13 and Figure 14 The optical path is not shown being deflected by a reflective element (such as prism E1). However, it will be understood that the optical path deflection element configuration of the imaging device 3 in this embodiment may, for example, have the same configuration as in the first embodiment. Figures 5 to 8 Similarly, the optical path switching structure configuration of this embodiment can, for example, have a similar structure. Figures 26 to 29 The present invention is not limited to the structure described herein.

[0246] The first lens Lf11 of the first front group 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.

[0247] The second lens Lf12 of the first front group has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical.

[0248] The third lens Lf13 of the first front group 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.

[0249] The fourth lens of the first front group, Lf14, 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.

[0250] The first lens Lf21 of the second front group 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.

[0251] The first lens Lr1 in the rear group 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 aspherical.

[0252] The second lens Lr2 in the rear group 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.

[0253] The third lens Lr3 in the rear group 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.

[0254] The fourth lens in the rear group, Lr4, 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, and its object-side surface has a critical point off-axis.

[0255] The filter element E3 is made of glass and is located between the fourth lens Lr4 in the rear group and the imaging plane IMG. It does not affect the focal length of the image capturing lens system group.

[0256] Please refer to Tables 7, 8, and 9 below.

[0257]

[0258]

[0259]

[0260]

[0261]

[0262]

[0263] In the third embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in the table below are the same as in the first embodiment and will not be repeated here.

[0264]

[0265]

[0266] <Fourth Embodiment>

[0267] Please refer to Figures 17 to 20 ,in Figure 17 A schematic diagram illustrating the image capturing lens system assembly of the image capturing device according to the fourth embodiment of the present invention in the first optical path state is shown. Figure 18 A schematic diagram illustrating the image capturing lens system assembly of the image capturing device according to the fourth embodiment of the present invention in the second optical path state is shown. Figure 19 From left to right, the images shown are the spherical aberration, astigmatism, and distortion curves of the image capturing lens system assembly of the fourth embodiment in the first optical path state. Figure 20 From left to right, the images shown are the spherical aberration, astigmatism, and distortion curves of the image capturing lens system assembly of the fourth embodiment in the second optical path state. Figure 17 and Figure 18 As can be seen, the image capturing device 4 includes an image capturing lens system assembly (not otherwise labeled) and an electronic photosensitive element IS. The image capturing lens system assembly includes a first front lens group Gf1, a second front lens group Gf2, a rear lens group Gr, and an optical path switching structure (not shown), wherein the optical path switching structure is used to allow the image capturing lens system assembly to switch between a first optical path state and a second optical path state. Figure 17As shown, when the image capturing lens system is in the first optical path state, the image capturing lens system includes a first front lens group Gf1 and a rear lens group Gr sequentially from the object side to the image side along the first optical path. Figure 18 As shown, when the image capturing lens system is in the second optical path state, the image capturing lens system includes a second front lens group Gf2 and a rear lens group Gr sequentially from the object side to the image side along the second optical path. The first front lens group Gf1 includes four lenses, which are, sequentially from the object side to the image side along the first optical path, the first lens Lf11, the second lens Lf12, the third lens Lf13, and the fourth lens Lf14, and there are no other interposed lenses between each lens. The second front lens group Gf2 includes one lens, which is the first lens Lf21 of the second front lens group. The rear lens group Gr includes four lenses, which are, sequentially from the object side to the image side along the optical path, the first lens Lr1, the second lens Lr2, the third lens Lr3, and the fourth lens Lr4, and there are no other interposed lenses between each lens. Furthermore, the rear lens group Gr includes a movable lens subgroup Gm, which is movable along the optical axis when the image capturing lens system group switches between a first optical path state and a second optical path state. In this embodiment, the movable lens subgroup Gm includes a lens, which is the fourth lens Lr4 of the rear group, and the movable lens subgroup Gm has negative refractive power. Figure 17 and Figure 18 It can be seen that when the image capturing lens system group switches from the first optical path state to the second optical path state, the movable lens subgroup Gm moves along the optical axis toward the image side.

[0268] The image capturing lens system also includes an aperture ST1, a prism E1, an aperture stop S1, an aperture ST2, a prism E4, a filter element E3, and an imaging plane IMG. For example... Figure 17 As shown, when the image capturing lens system is in the first optical path state, the image capturing lens system, along the first optical path from the object side to the image side, sequentially includes an aperture ST1, a first front group first lens Lf11, a prism E1, a first front group second lens Lf12, a first front group third lens Lf13, an aperture stop S1, a first front group fourth lens Lf14, a rear group first lens Lr1, a rear group second lens Lr2, a rear group third lens Lr3, a rear group fourth lens Lr4, a filter element E3, and an imaging plane IMG. Figure 18 As shown, when the image capturing lens system is in the second optical path state, the image capturing lens system includes, in sequence from the object side to the image side, an aperture ST2, a second front group first lens Lf21, a prism E4, a rear group first lens Lr1, a rear group second lens Lr2, a rear group third lens Lr3, a rear group fourth lens Lr4, a filter element E3, and an imaging surface IMG. The electronic photosensitive element IS is disposed on the imaging surface IMG.

[0269] Prism E1 is made of glass and has a reflective surface. Prism E1 is positioned within the first front lens group Gf1, and the first optical path is deflected and redirected by the reflective surface of prism E1. Prism E4 is also made of glass and has a reflective surface. Prism E4 is positioned between the second front lens group Gf2 and the rear lens group Gr, and the second optical path is deflected and redirected by the reflective surface of prism E4. To clearly illustrate the optical path of the image-capturing device, Figure 17 and Figure 18 The optical path is not shown being deflected by reflective elements (such as prisms E1 and E4). However, it will be understood that the optical path deflection element configuration of the imaging device 4 in this embodiment may, for example, have the same configuration as in the first embodiment. Figures 5 to 8 Similarly, the optical path switching structure configuration of this embodiment can, for example, have a similar structure. Figures 26 to 29 The present invention is not limited to the structure described herein.

[0270] The first lens Lf11 of the first front group 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.

[0271] The second lens Lf12 of the first front group 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.

[0272] The third lens Lf13 of the first front group has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical.

[0273] The fourth lens of the first front group, Lf14, 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.

[0274] The first lens Lf21 of the second front group 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.

[0275] The first lens Lr1 in the rear group 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.

[0276] The second lens Lr2 in the rear group has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical.

[0277] The third lens Lr3 in the rear group 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.

[0278] The fourth lens in the rear group, Lr4, has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical, and its object-side surface has a critical point off-axis.

[0279] The filter element E3 is made of glass and is located between the fourth lens Lr4 in the rear group and the imaging plane IMG. It does not affect the focal length of the image capturing lens system group.

[0280] Please refer to Tables 10, 11, and 12 below.

[0281]

[0282]

[0283]

[0284]

[0285]

[0286]

[0287] In the fourth embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in the table below are the same as in the first embodiment and will not be repeated here.

[0288]

[0289]

[0290] <Fifth Embodiment>

[0291] Please refer to Figure 21 and Figure 22 ,in Figure 21 A perspective view of one side of an electronic device according to a fifth embodiment of the present invention is shown, and Figure 22 Draw Figure 21 A three-dimensional diagram of the other side of the electronic device.

[0292] In this embodiment, the electronic device 200 is a smartphone. The electronic device 200 includes image capturing devices 100, 100a, 100b, 100c, 100d, and 100e, a flash module 201, a display device 202, a focus assist module, an image signal processor, and an image software processor. Image capturing devices 100, 100a, and 100b are all located on the same side of the electronic device 200, while image capturing devices 100c, 100d, 100e, and the display device 202 are located on the other side of the electronic device 200.

[0293] The image capturing device 100 is a camera module with dual optical paths, comprising an imaging lens, a driving device, an electronic photosensitive element, and an image stabilization module. The imaging lens includes the image capturing lens system assembly, a lens barrel, and a support device. The image capturing lens system assembly includes two sets of front lens groups, a rear lens group, and an optical path switching structure. The image capturing device 100 can switch the optical path via the optical path switching structure to achieve an optical zoom effect. Specifically, the two sets of front lens groups are a first front lens group and a second front lens group, and the optical path switching structure allows the image capturing lens system assembly to switch between a first optical path state and a second optical path state. In the first optical path state, the imaging light rays sequentially pass through the first front lens group and the rear lens group, and in the second optical path state, the imaging light rays sequentially pass through the second front lens group and the rear lens group. Furthermore, the image capturing device 100 is a telescopic image capturing device with a deflecting optical path configuration. Its reflective elements can adjust the direction of the imaging light (deflecting the optical path), so that the overall length of the image capturing device 100 and the thickness of the electronic device 200 are not mutually limited. The optical path deflecting element configuration of the image capturing device 100 can, for example, have a structure similar to that of the aforementioned embodiments, and the optical path switching structure configuration can, for example, have a similar... Figures 26 to 29 The structure is not described in detail here. For example, the imaging lens may be configured with the image capturing lens system group of any of the above embodiments, but the present invention is not limited thereto. The image capturing device 100 uses the imaging lens to focus light to generate an image, and cooperates with the driving device to zoom or focus the image, and finally images it on the electronic photosensitive element and can be output as image data.

[0294] The driving device can have an auto-focus function, and its driving method can use driving systems such as voice coil motors (VCM), microelectromechanical systems (MEMS), piezoelectric systems, and shape memory alloys. The driving device allows the imaging lens to achieve a better imaging position, enabling clear images of the subject at different object distances. In addition, the image capturing device 100 is equipped with a high-sensitivity and low-noise electronic image sensor (such as CMOS or CCD) located on the imaging surface of the image capturing lens system assembly, which can truly present the good image quality of the image capturing lens system assembly.

[0295] Image stabilization modules can be, for example, accelerometers, gyroscopes, or Hall effect sensors. The drive unit can work in conjunction with the image stabilization module to function as an optical image stabilization (OIS) device. This compensates for blur caused by camera shake during shooting by adjusting the different axes of the imaging lens. Alternatively, it can utilize image compensation technology in imaging software to provide electronic image stabilization (EIS), further improving image quality in dynamic and low-light scenes.

[0296] Image capturing device 100 is a telescopic image capturing device with an optical path deflection element (such as a reflective element). Image capturing device 100a is a wide-angle image capturing device, and image capturing device 100b is an ultra-wide-angle image capturing device. In this embodiment, image capturing devices 100, 100a, and 100b have different viewing angles, which allows the electronic device 200 to have a greater zoom ratio to expand its application range. The above-described electronic device 200 includes three image capturing devices 100, 100a, and 100b located on the same side as an example, but the present invention is not limited thereto. In other embodiments, the electronic device may include at least two image capturing devices located on the same side, or the electronic device may include at least three image capturing devices located on the same side.

[0297] Image capturing device 100c is a wide-angle image capturing device, image capturing device 100d is an ultra-wide-angle image capturing device, and image capturing device 100e is a time-of-flight (ToF) image capturing device, wherein image capturing device 100e can acquire depth information of the image. Image capturing devices 100c, 100d, 100e and display device 202 are all disposed on the same side of electronic device 200 so that image capturing devices 100c, 100d and 100e can be used as front-facing cameras to provide selfie function, but the present invention is not limited thereto.

[0298] When a user photographs a subject, the electronic device 200 uses image capturing devices 100, 100a, or 100b to capture the image, activates the flash module 201 for supplemental lighting, and uses the subject distance information provided by the focus assist module for fast focusing. Furthermore, the image signal processor performs image optimization processing to further improve the image quality produced by the image capturing lens system assembly. The focus assist module can use an infrared or laser focus assist system to achieve fast focusing. Alternatively, the electronic device 200 can also use image capturing devices 100c, 100d, or 100e for shooting. The display device 202 can use a touchscreen, combined with the diverse functions of the image software processor for image capturing and processing (or can use a physical shooting button). The image processed by the image software processor can be displayed on the display device 202.

[0299] The above-mentioned electronic device 200 includes a plurality of image capturing devices 100, 100a, 100b, 100c, 100d, and 100e as an example, but the number and configuration of the image capturing devices are not intended to limit the present invention.

[0300] <Sixth Embodiment>

[0301] Please refer to Figure 23 A perspective view of one side of an electronic device according to a sixth embodiment of the present invention is shown.

[0302] In this embodiment, the electronic device 300 is a smartphone. The electronic device 300 includes image capturing devices 100f, 100g, 100h, 100i, 100j, 100k, 100m, 100n, and 100p, a flash module 301, a focus assist module, an image signal processor, a display device, and an image software processor (not shown separately). Image capturing devices 100f, 100g, 100h, 100i, 100j, 100k, 100m, 100n, and 100p are all located on the same side of the electronic device 300, while the display device is located on the other side. The image capturing device 100f is a camera module with dual optical paths, including an imaging lens, a driving device, an electronic image sensor, and an image stabilization module. The imaging lens includes the image capturing lens system assembly, lens barrel, and support device of the present invention. The image capturing lens system assembly includes two front lens groups, a rear lens group, and an optical path switching structure. The image capturing device 100f can switch the optical path through the optical path switching structure to achieve an optical zoom effect. Specifically, the two front lens groups are a first front lens group and a second front lens group, and the optical path switching structure allows the image capturing lens system assembly to switch between a first optical path state and a second optical path state. In the first optical path state, the imaging light rays of the image capturing lens system assembly pass sequentially through the first front lens group and the rear lens group, and in the second optical path state, the imaging light rays pass sequentially through the second front lens group and the rear lens group.

[0303] Image capturing devices 100f and 100g are telescopic image capturing devices with optical path reversing elements (such as reflective elements); image capturing devices 100h and 100i are telescopic image capturing devices; image capturing devices 100j and 100k are wide-angle image capturing devices; image capturing devices 100m and 100n are ultra-wide-angle image capturing devices; and image capturing device 100p is a time-of-flight ranging image capturing device. The optical path reversing element configuration of image capturing device 100f can, for example, have a structure similar to that of the aforementioned embodiments, and its optical path switching structure configuration can, for example, have a similar... Figures 26 to 29 The structure, and the optical path deflection element configuration of the 100g imaging device can, for example, have similar... Figures 30 to 32 For the structure, please refer to the aforementioned corresponding text. Figures 30 to 32The details of the description are omitted here. In this embodiment, the image capturing devices 100f, 100g, 100h, 100i, 100j, 100k, 100m, 100n, and 100p have different viewing angles, allowing the electronic device 300 to provide different magnifications to achieve optical zoom shooting effects. The above-described electronic device 300 is exemplified by including multiple image capturing devices 100f, 100g, 100h, 100i, 100j, 100k, 100m, 100n, and 100p, but the number and configuration of the image capturing devices are not intended to limit the invention.

[0304] The image capturing device of the present invention is not limited to application in smartphones. It can also be applied to mobile focusing systems as needed, and features excellent aberration correction and good image quality. For example, the image capturing device can be widely used in electronic devices such as 3D image capture, digital cameras, mobile devices, digital computers, smart TVs, network monitoring equipment, dashcams, reversing cameras, multi-lens devices, recognition systems, motion-sensing game consoles, and wearable devices. The aforementioned electronic devices are merely illustrative examples of practical applications of the present invention and do not limit the scope of application of the image capturing device of the present invention.

[0305] Although the present invention has been disclosed above with reference to the preferred embodiments described above, it is not intended to limit the present invention. Any person skilled in the art may make some modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of patent protection of the present invention shall be determined by the claims appended to this specification.

Claims

1. An image capturing lens system assembly, characterized in that, The image capturing lens system assembly includes a first front lens group, a second front lens group, a rear lens group, and an optical path switching structure. The optical path switching structure enables the image capturing lens system assembly to switch between a first optical path state and a second optical path state. When the image capturing lens system assembly is in the first optical path state, the image capturing lens system assembly includes the first front lens group and the rear lens group sequentially from the object side to the image side in a first optical path. When the image capturing lens system assembly is in the second optical path state, the image capturing lens system assembly includes the second front lens group and the rear lens group sequentially from the object side to the image side in a second optical path. The first front lens group includes at least three lenses, the second front lens group includes at least one lens, and the rear lens group includes at least two lenses. The at least three lenses of the first front lens group, the at least one lens of the second front lens group, and the at least two lenses of the rear lens group each have an object-side surface facing the object side and an image-side surface facing the image side. At least one of the object-side surface and the image-side surface of the at least one lens in the rear lens group is an aspherical surface. Wherein, half of the maximum field of view in the image capturing lens system group is HFOV, the focal length of the image capturing lens system group in the first optical path state is FS1, the focal length of the image capturing lens system group in the second optical path state is FS2, and the minimum Abbe number of all lenses in the rear lens group is minVGr, which satisfies the following conditions: 3.0 degrees < HFOV < 18.0 degrees; 1.2 < FS1 / FS2; and 8.0 < minVGr < 26.

5.

2. The image capturing lens system assembly according to claim 1, characterized in that, The focal length of the image capturing lens system group in the first optical path state is FS1, the focal length of the image capturing lens system group in the second optical path state is FS2, and the minimum Abbe number of all lenses in the rear lens group is minVGr, which satisfies the following condition: 1.4 < FS1 / FS2 < 5.5; and 10.0 < minVGr < 23.

0.

3. The image capturing lens system assembly according to claim 1, characterized in that, The focal length of the first front lens group is FGf1, and the focal length of the second front lens group is FGf2, which satisfy the following conditions: 1.2 < FGf1 / FGf2 < 2.

0.

4. The image capturing lens system assembly according to claim 1, characterized in that, The optical path switching structure includes at least one reflective element, and the at least one reflective element can move or rotate relative to the first front lens group, the second front lens group, or the rear lens group.

5. The image capturing lens system assembly according to claim 1, characterized in that, It also includes a first reflective element, wherein the first reflective element is disposed in the first front lens group; The image capturing lens system group further includes a second reflective element. When the image capturing lens system group is in the second optical path state, the second reflective element is located between the second front lens group and the rear lens group in the second optical path.

6. The image capturing lens system assembly according to claim 1, characterized in that, The first front lens group comprises four lenses, the second front lens group comprises one lens, and the rear lens group comprises four lenses.

7. The image capturing lens system assembly according to claim 1, characterized in that, The rear lens group includes a movable lens subgroup, which contains at least one lens, and the movable lens subgroup moves along the optical axis when the image capturing lens system group switches between the first optical path state and the second optical path state.

8. The image capturing lens system assembly according to claim 7, characterized in that, The movable lens subgroup has negative refractive power; Wherein, the focal length of the movable lens subgroup is FGm, and the thickness of the movable lens subgroup on the optical axis is TGm, which satisfies the following conditions: -50.0 < FGm / TGm < -10.

0.

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

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

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