Imaging optical lens, image capturing device and electronic device

Abstract

The invention discloses an optical lens for imaging. The optical lens comprises five lenses. The five lenses are sequentially a first lens, a second lens, a third lens, a fourth lens and a fifth lens from the object side to the image side along an optical path. Each of the five lenses has an object-side surface facing the object-side direction and an image-side surface facing the image-side direction. The first lens element has positive refractive power. The second lens element has an image-side surface being concave in a paraxial region thereof. The object-side surface of the third lens element is convex in a paraxial region, and the image-side surface of the third lens element is concave in a paraxial region. The fourth lens element has an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof. When specific conditions are met, the optical lens for imaging can meet the requirements of a mobile focusing function, a telescopic function, miniaturization and high imaging quality at the same time. The invention further discloses an image capturing device with the optical lens for imaging and an electronic device with the image capturing device.

Description

Technical Field

[0001] The present disclosure relates to an optical lens for imaging, an image capturing device, and an electronic device, and particularly to an optical lens for imaging and an image capturing device suitable for an electronic device. Background Art

[0002] As semiconductor process technology becomes more sophisticated, the performance of electronic photosensitive elements has been improved, and pixels can reach smaller sizes. Therefore, an optical lens with high imaging quality has become an essential part.

[0003] With the rapid development of technology, the application scope 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 conventional 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 disclosure provides an optical lens for imaging, an image capturing device, and an electronic device. Among them, the optical lens for imaging includes at least four lenses arranged in sequence from the object side to the image side along the optical path. When specific conditions are met, the optical lens for imaging provided by the present disclosure can simultaneously meet the requirements of focusing function, telephoto function, miniaturization, and high imaging quality.

[0005] The present disclosure provides an optical lens for imaging, including five lenses. The five lenses are, in sequence from the object side to the image side along the optical path, a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. The five lenses respectively have an object side surface facing the object side direction and an image side surface facing the image side direction. Preferably, the first lens has a positive refractive power. Preferably, the image side surface of the second lens is concave near the optical axis. Preferably, the object side surface of the third lens is convex near the optical axis. Preferably, the image side surface of the third lens is concave near the optical axis. Preferably, the object side surface of the fourth lens is convex near the optical axis. Preferably, the image side surface of the fourth lens is concave near the optical axis. Preferably, when the object is located at an infinite object distance and the entrance pupil diameter of the optical lens for imaging is the largest, the optical lens for imaging is in a first state. When the optical lens for imaging is in the first state, the distance on the optical axis from the object side surface of the lens closest to the object side to the image side surface of the lens closest to the image side is TDL, the distance on the optical axis from the image side surface of the lens closest to the image side to the imaging surface when the optical lens for imaging is in the first state is BLL, the focal length of the optical lens for imaging in the first state is fL, the radius of curvature of the image side surface of the first lens is R2, the radius of curvature of the object side surface of the fourth lens is R7, the radius of curvature of the image side surface of the fourth lens is R8, and the distance on the optical axis between the third lens and the fourth lens when the optical lens for imaging is in the first state is T34L, and the thickness of the fourth lens on the optical axis is CT4. Preferably, it satisfies the following conditions:

[0006] 0.10 < TDL / BLL < 0.60;

[0007] 5.00 < fL / R7 + fL / R8 < 20.00;

[0008] 0.55 < (R2 + R7) / (R2 - R7) < 1.60; and

[0009] 0.10 < 10×T34L / CT4 < 5.00.

[0010] The present disclosure further provides an optical lens for imaging, comprising five lenses. The five lenses are, in order from the object side to the image side along the optical path, a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. The five lenses respectively have an object-side surface facing the object side direction and an image-side surface facing the image side direction. Preferably, the first lens has a positive refractive power. Preferably, the image-side surface of the second lens is concave near the optical axis. Preferably, the object-side surface of the third lens is convex near the optical axis. Preferably, the object-side surface of the fourth lens is convex near the optical axis. Preferably, the image-side surface of the fourth lens is concave near the optical axis. Preferably, when the object is located at an infinite object distance and the entrance pupil diameter of the optical lens for imaging is at its maximum, the optical lens for imaging is in a first state. When the optical lens for imaging is in the first state, the distance on the optical axis from the object-side surface of the lens closest to the object side to the image-side surface of the lens closest to the image side is TDL, the distance on the optical axis from the image-side surface of the lens closest to the image side to an imaging plane when the optical lens for imaging is in the first state is BLL, the focal length of the optical lens for imaging in the first state is fL, the focal length of the first lens is f1, the focal length of the second lens is f2, the radius of curvature of the object-side surface of the second lens is R3, the radius of curvature of the image-side surface of the third lens is R6, the radius of curvature of the object-side surface of the fourth lens is R7, and the radius of curvature of the image-side surface of the fourth lens is R8, which preferably satisfy the following conditions:

[0011] 0.10 < TDL / BLL < 0.60;

[0012] 5.00 < fL / R7 + fL / R8 < 20.00;

[0013] -1.50 < (R3 - R6) / (R3 + R6) < 1.40; and

[0014] |f1 / f2| < 0.82.

[0015] The present disclosure further provides an optical lens for imaging, which sequentially includes a moving lens group and a last lens group from the object side to the image side along the optical path direction. The total number of lenses in the optical lens for imaging is at least four. The moving lens group includes at least one lens, and the last lens group includes at least one lens. The lenses in the optical lens for imaging respectively have an object-side surface facing the object side direction and an image-side surface facing the image side direction. Preferably, when the object is located at an infinite object distance and the entrance pupil diameter of the optical lens for imaging is the largest, the optical lens for imaging is in the first state. Preferably, when the object is located at a finite object distance, the optical lens for imaging is in the second state. Preferably, when the object moves from an infinite object distance to a finite object distance, the optical lens for imaging performs a moving focusing process to change from the first state to the second state. Preferably, the moving lens group moves toward the object side along the optical axis direction relative to the last lens group during the moving focusing process of the optical lens for imaging changing from the first state to the second state. Preferably, the lens closest to the object side in the moving lens group has a positive refractive power and its object-side surface is convex at the paraxial region. Preferably, the optical lens for imaging further includes a reflecting element, and the reflecting element is located between the object and the imaging surface along the optical path direction. The distance on the optical axis from the object-side surface of the lens closest to the object side to the image-side surface of the lens closest to the image side when the optical lens for imaging is in the first state is TDL. The distance on the optical axis from the object-side surface of the lens closest to the object side to the image-side surface of the lens closest to the image side when the optical lens for imaging is in the second state is TDS. The distance on the optical axis from the image-side surface of the lens closest to the image side to the imaging surface when the optical lens for imaging is in the first state is BLL. The distance on the optical axis from the image-side surface of the lens closest to the image side to the imaging surface when the optical lens for imaging is in the second state is BLS, and it preferably satisfies the following conditions:

[0016] 0.10 < TDL / BLL < 0.60;

[0017] 1.00 < 10×|TDS - TDL| / TDL < 10.00; and

[0018] 0.80 < BLS / BLL < 1.30.

[0019] The present disclosure further provides an imaging optical lens, which sequentially includes a movable lens group, a last lens group, and a prism from the object side to the image side along the optical path direction. The movable lens group includes at least one lens, and the last lens group includes at least one lens. The lenses in the imaging optical lens respectively have an object-side surface facing the object side direction and an image-side surface facing the image side direction. Preferably, when the object is located at an infinite object distance and the entrance pupil diameter of the imaging optical lens is the largest, the imaging optical lens is in a first state. Preferably, when the object is located at a finite object distance, the imaging optical lens is in a second state. Preferably, when the object moves from an infinite object distance to a finite object distance, the imaging optical lens performs a moving focusing process to change from the first state to the second state. Preferably, the movable lens group moves along the optical axis direction relative to the last lens group during the moving focusing process of the imaging optical lens changing from the first state to the second state. Preferably, the object-side surface of the lens closest to the object side in the imaging optical lens is convex at the paraxial region. Preferably, there are no other interpolated lenses on the optical axis between the last lens group and the prism. Preferably, the prism has at least three reflecting surfaces.

[0020] The present disclosure provides an image pickup device, which includes the aforementioned imaging optical lens and an electronic photosensitive element, wherein the electronic photosensitive element is disposed on the imaging surface of the imaging optical lens.

[0021] The present disclosure provides an electronic device, which includes the aforementioned image pickup device.

[0022] When TDL / BLL satisfies the above conditions, an appropriate back focal length can be adjusted to facilitate the folding of the optical path.

[0023] When fL / R7 + fL / R8 satisfies the above conditions, the configuration of the total focal length, the curvature radius of the object-side surface of the fourth lens, and the curvature radius of the image-side surface of the fourth lens can be adjusted, so that the imaging optical lens can maintain a smaller outer diameter and an appropriate back focal length while correcting off-axis aberrations.

[0024] When (R2 + R7) / (R2 - R7) satisfies the above conditions, the curvature radius of the image-side surface of the first lens and the curvature radius of the object-side surface of the fourth lens can be effectively balanced, and the traveling direction of the peripheral light rays can be adjusted, which helps to correct astigmatism and reduce stray light in the imaging optical lens.

[0025] When 10×T34L / CT4 satisfies the above conditions, the distance between the third lens and the fourth lens and the central thickness of the fourth lens can be balanced, which helps to compress the volume and correct spherical aberration.

[0026] When (R3 - R6) / (R3 + R6) satisfies the above conditions, the curvature radius of the object side surface of the second lens and the curvature radius of the image side surface of the third lens can be effectively balanced, which helps to improve the light condensing quality of the imaging light, effectively improve the image bending situation and reduce the spherical aberration.

[0027] When |f1 / f2| satisfies the above conditions, the refractive powers of the first lens and the second lens can be balanced, which helps to balance the convergence or divergence of light and improve the light condensing quality of the entire field of view.

[0028] When 10×|TDS - TDL| / TDL satisfies the above conditions, by maintaining the moving amount of the moving lens group during the moving focusing process, it helps to photograph objects with a smaller object distance and meet the requirements of the large-size photosensitive element specifications, which helps to improve the imaging quality.

[0029] When BLS / BLL satisfies the above conditions, maintaining a relatively constant back focal length during the moving focusing process not only helps to simplify the complexity of the mechanism design, which is beneficial to improving the qualification rate of lens assembly; moreover, it also helps to reduce the space required by the lens group, achieving space savings and at the same time having the telephoto effect of a long focal length.

[0030] The above description of the present disclosure content and the following description of the embodiments are used to demonstrate and explain the spirit and principle of the present disclosure, and provide a further explanation of the claims of the present disclosure. Brief Description of the Drawings

[0031] Figure 1 Schematic diagrams showing the imaging device according to the first embodiment of the present disclosure in the first state and in the second state respectively.

[0032] Figure 2 From left to right are the spherical aberration, astigmatism, and distortion curves of the imaging device according to the first embodiment in the first state.

[0033] Figure 3 From left to right are the spherical aberration, astigmatism, and distortion curves of the imaging device according to the first embodiment in the second state.

[0034] Figure 4 Schematic diagrams showing the imaging device according to the second embodiment of the present disclosure in the first state and in the second state respectively.

[0035] Figure 5 From left to right are the spherical aberration, astigmatism, and distortion curves of the imaging device according to the second embodiment in the first state.

[0036] Figure 6 From left to right are the spherical aberration, astigmatism, and distortion curves of the imaging device according to the second embodiment in the second state.

[0037] Figure 7 Schematic diagrams showing an imaging device according to a third embodiment of the present disclosure in a first state and in a second state, respectively.

[0038] Figure 8 From left to right are the spherical aberration, astigmatism, and distortion curves of the imaging device according to the third embodiment in the first state.

[0039] Fig. 9 From left to right are the spherical aberration, astigmatism, and distortion curves of the imaging device according to the third embodiment in the second state.

[0040] Fig.10 Schematic diagrams showing an imaging device according to a fourth embodiment of the present disclosure in a first state and in a second state, respectively.

[0041] Fig.11 From left to right are the spherical aberration, astigmatism, and distortion curves of the imaging device according to the fourth embodiment in the first state.

[0042] Fig.12 From left to right are the spherical aberration, astigmatism, and distortion curves of the imaging device according to the fourth embodiment in the second state.

[0043] Fig.13 Schematic diagrams showing an imaging device according to a fifth embodiment of the present disclosure in a first state and in a second state, respectively.

[0044] Fig.14 From left to right are the spherical aberration, astigmatism, and distortion curves of the imaging device according to the fifth embodiment in the first state.

[0045] Fig.15 From left to right are the spherical aberration, astigmatism, and distortion curves of the imaging device according to the fifth embodiment in the second state.

[0046] Fig.16 Schematic diagrams showing an imaging device according to a sixth embodiment of the present disclosure in a first state and in a second state, respectively.

[0047] Fig.17 From left to right are the spherical aberration, astigmatism, and distortion curves of the imaging device according to the sixth embodiment in the first state.

[0048] Fig.18 From left to right are the spherical aberration, astigmatism, and distortion curves of the imaging device according to the sixth embodiment in the second state.

[0049] Fig.19 Schematic diagrams showing an imaging device according to a seventh embodiment of the present disclosure in a first state and in a second state, respectively.

[0050] Fig. 20 From left to right are the spherical aberration, astigmatism, and distortion curves of the imaging device of the seventh embodiment in the first state.

[0051] Fig.21 From left to right are the spherical aberration, astigmatism, and distortion curves of the imaging device of the seventh embodiment in the second state.

[0052] Fig. 22 Schematic diagrams showing the imaging device according to the eighth embodiment of the present disclosure in the first state and in the second state, respectively.

[0053] Fig.23 From left to right are the spherical aberration, astigmatism, and distortion curves of the imaging device of the eighth embodiment in the first state.

[0054] Fig.24 From left to right are the spherical aberration, astigmatism, and distortion curves of the imaging device of the eighth embodiment in the second state.

[0055] Fig.25 Schematic diagrams showing the imaging device according to the ninth embodiment of the present disclosure in the first state, in the second state, and in the third state, respectively.

[0056] Fig.26 From left to right are the spherical aberration, astigmatism, and distortion curves of the imaging device of the ninth embodiment in the first state.

[0057] Fig. 27 From left to right are the spherical aberration, astigmatism, and distortion curves of the imaging device of the ninth embodiment in the second state.

[0058] Fig.28 From left to right are the spherical aberration, astigmatism, and distortion curves of the imaging device of the ninth embodiment in the third state.

[0059] Fig.29 Schematic diagrams showing the imaging device according to the tenth embodiment of the present disclosure in the first state and in the second state, respectively.

[0060] Fig.30 From left to right are the spherical aberration, astigmatism, and distortion curves of the imaging device of the tenth embodiment in the first state.

[0061] Fig.31 From left to right are the spherical aberration, astigmatism, and distortion curves of the imaging device of the tenth embodiment in the second state.

[0062] Fig.32 Schematic diagrams showing the imaging device according to the eleventh embodiment of the present disclosure in the first state and in the second state, respectively.

[0063] Fig.33 From left to right are the spherical aberration, astigmatism, and distortion curve graphs of the imaging device of the eleventh embodiment in the first state.

[0064] Fig.34 From left to right are the spherical aberration, astigmatism, and distortion curve graphs of the imaging device of the eleventh embodiment in the second state.

[0065] Fig.35 A three-dimensional schematic diagram showing an imaging device according to the twelfth embodiment of the present disclosure.

[0066] Fig.36 A three-dimensional schematic diagram showing one side of an electronic device according to the thirteenth embodiment of the present disclosure.

[0067] Fig.37 Showing Fig.36 A three-dimensional schematic diagram of the other side of the electronic device.

[0068] Fig.38 Showing Fig.36 A system block diagram of the electronic device.

[0069] Fig.39 A three-dimensional schematic diagram showing one side of an electronic device according to the fourteenth embodiment of the present disclosure.

[0070] Fig.40 Showing Fig.39 A three-dimensional schematic diagram of the other side of the electronic device.

[0071] Fig.41 A three-dimensional schematic diagram showing one side of an electronic device according to the fifteenth embodiment of the present disclosure.

[0072] Fig.42 A schematic diagram showing the inflection points on the surface of some lenses in the first embodiment of the present disclosure.

[0073] Fig.43 A schematic diagram showing the parameters Y1R1L, Y2R2L, Y5R2L, Sag2R2L, and Sag3R1L of the imaging device of the first embodiment of the present disclosure in the first state.

[0074] Fig.44 A schematic diagram showing a shape configuration of an aperture according to the present disclosure.

[0075] Fig.45 A schematic diagram showing another shape configuration of an aperture according to the present disclosure.

[0076] Figure 46 to Figure 48 Schematic diagrams respectively showing a configuration relationship of a reflection element in an imaging optical lens according to the present disclosure.

[0077] Fig.49 and Fig.50 respectively illustrate a schematic diagram of a configuration relationship of two reflection elements in an imaging optical lens according to the present disclosure.

[0078] Fig.51 Illustrate a schematic diagram of a configuration relationship of a dual-reflection element in an imaging optical lens according to the present disclosure.

[0079] Fig.52 Illustrate a schematic diagram of a configuration relationship of a triple-reflection element in an imaging optical lens according to the present disclosure.

[0080] Fig.53 Illustrate a schematic diagram of a configuration relationship of a quadruple-reflection element in an imaging optical lens according to the present disclosure.

[0081] Fig.54 Illustrate a schematic diagram of a configuration relationship of a quintuple-reflection element in an imaging optical lens according to the present disclosure.

[0082] Fig.55 Illustrate a schematic diagram of a configuration relationship of a reflection element in an imaging optical lens according to the present disclosure.

[0083] Fig.56 Illustrate a schematic diagram of a configuration relationship of another reflection element in an imaging optical lens according to the present disclosure.

[0084] Fig.57 Illustrate a schematic diagram of the configuration relationship and optical path turning of an image pickup device with a reflection element in the first embodiment according to the present disclosure.

[0085] Fig.58 Illustrate a schematic diagram of the configuration relationship and optical path turning of an image pickup device with another reflection element in the first embodiment according to the present disclosure.

[0086] Fig.59 Illustrate a schematic diagram of the configuration relationship and optical path turning of an image pickup device with another reflection element in the first embodiment according to the present disclosure.

[0087] Fig.60 Illustrate a schematic diagram of the configuration relationship and optical path turning of an image pickup device with another reflection element in the first embodiment according to the present disclosure.

[0088] Fig.61 Illustrate a schematic diagram of the configuration relationship and optical path turning of an image pickup device with another reflection element in the first embodiment according to the present disclosure.

[0089] Fig.62 Illustrate a schematic diagram of the configuration relationship and optical path turning of an image pickup device with another reflection element in the first embodiment according to the present disclosure.

[0090] Fig.63 A schematic diagram showing the configuration relationship and the optical path turning of the imaging device with another reflection element in the first embodiment of the present disclosure.

[0091] Fig.64 A schematic diagram showing the configuration relationship and the optical path turning of the imaging device with a reflection element in the seventh embodiment of the present disclosure.

[0092] Fig.65 A schematic diagram showing the configuration relationship and the optical path turning of the imaging device with one of the reflection elements in the first embodiment of the present disclosure in the first state and in the second state respectively.

[0093] Fig.66 A schematic diagram showing the configuration relationship and the optical path turning of the imaging device with a reflection element in the tenth embodiment of the present disclosure in the first state and in the second state respectively.

[0094] Fig.67 A schematic diagram showing one of the implementation aspects of the reflection element in the first embodiment of the present disclosure.

[0095] Fig.68 Show Fig.67 A three-dimensional schematic diagram of the reflection element without a cut edge and a groove formed thereon.

[0096] Fig.69 Show Fig.67 A three-dimensional schematic diagram of the reflection element with a cut edge and a groove formed thereon.

[0097]

Symbol Description

[0098] 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 100, 100a, 100b, 100c, 100d, 100e, 100f, 100g, 100h, 100i, 100j, 100k, 100m, 100n, 100p, 100q, 100r: Imaging device

[0099] 101: Imaging lens

[0100] 102: Driving device

[0101] 103: Electronic photosensitive element

[0102] 104: Image stabilization module

[0103] 200, 300, 400: Electronic device

[0104] 201, 401: Flashlight module

[0105] 202: Focus assist module

[0106] 203: Image signal processor

[0107] 204, 304: Display module

[0108] 205: Image software processor

[0109] 206: Object

[0110] ST: Aperture

[0111] S1, S2: Diaphragm

[0112] E1: First lens

[0113] E2: Second lens

[0114] E3: Third lens

[0115] E4: Fourth lens

[0116] E5: Fifth lens

[0117] E6, LF: Reflective element

[0118] LP1, LP2: Transmission surface

[0119] RF1, RF2, RF3, RF4, RF5: Reflective surface

[0120] E7, FT: Filter element

[0121] IMG: Imaging surface

[0122] IS: Electronic photosensitive element

[0123] Gm: Moving lens group

[0124] Gn: Final lens group

[0125] P: Inflection point

[0126] LG: Lens group

[0127] OA, OA1, OA2, OA3, OA4, OA5, OA6: Optical axis

[0128] LX: Long axis direction

[0129] SY: Short axis direction

[0130] Ra, Rb: Effective radius

[0131] NPR: Non-optically effective diameter region

[0132] CP: Cutting edge

[0133] RP: Groove

[0134] DT: Distance

[0135] Sag2R2L: The displacement amount parallel to the optical axis from the intersection point of the image-side surface of the second lens on the optical axis to the maximum effective radius position of the image-side surface of the second lens when the imaging optical lens is in the first state

[0136] Sag3R1L: The displacement amount parallel to the optical axis from the intersection point of the object-side surface of the third lens on the optical axis to the maximum effective radius position of the object-side surface of the third lens when the imaging optical lens is in the first state

[0137] Y1R1L: The maximum effective radius of the object-side surface of the first lens when the imaging optical lens is in the first state

[0138] Y2R2L: The maximum effective radius of the image-side surface of the second lens when the imaging optical lens is in the first state

[0139] Y5R2L: The maximum effective radius of the image-side surface of the fifth lens when the imaging optical lens is in the first state Detailed implementation manners

[0140] The optical lens for imaging sequentially includes a movable lens group and a last lens group from the object side to the image side along the optical path direction, where the movable lens group includes at least one lens, the last lens group includes at least one lens, and the lenses in the optical lens for imaging respectively have an object side surface facing the object side direction and an image side surface facing the image side direction. Thereby, through the configuration of at least two lens groups, a balance can be achieved among volume, object distance range, moving focusing, image quality, and assembly difficulty. Among them, the optical lens for imaging may further include a prism, and the prism is located on the image side of the last lens group along the optical path direction (that is, the optical lens for imaging may sequentially include a movable lens group, a last lens group, and a prism from the object side to the image side along the optical path direction). Among them, the total number of lenses in the optical lens for imaging is at least four. In one embodiment, the optical lens for imaging may include four lenses, and the four lenses are sequentially the first lens, the second lens, the third lens, and the fourth lens from the object side to the image side along the optical path. In the embodiment where the optical lens for imaging includes four lenses, the movable lens group may include the first lens, and the last lens group may include the second lens, the third lens, and the fourth lens. In one embodiment, the optical lens for imaging may include five lenses, and the five lenses are sequentially the first lens, the second lens, the third lens, the fourth lens, and the fifth lens from the object side to the image side along the optical path. In the embodiment where the optical lens for imaging includes five lenses, the movable lens group may include the first lens and the second lens, and the last lens group may include the third lens, the fourth lens, and the fifth lens. When the total number of lenses in the optical lens for imaging is four, the first lens may also be referred to as the lens closest to the object side, and the fourth lens may also be referred to as the lens closest to the image side. When the total number of lenses in the optical lens for imaging is five, the first lens may also be referred to as the lens closest to the object side, and the fifth lens may also be referred to as the lens closest to the image side.

[0141] When the object is located at an infinite object distance and the entrance pupil diameter of the optical lens for imaging is the largest, the optical lens for imaging is in a first state. When the object is located at a finite object distance, the optical lens for imaging is in a second state. When the object moves from an infinite object distance to a finite object distance, the optical lens for imaging undergoes a moving focusing process to change from the first state to the second state. Conversely, when the object moves from a finite object distance to an infinite object distance, the optical lens for imaging also undergoes a moving focusing process to change from the second state to the first state. Among them, the object distance refers to the distance on the optical axis from the object to the object side surface of the lens closest to the object side in the optical lens for imaging.

[0142] The moving lens group moves along the optical axis direction relative to the last lens group during the moving focusing process when the imaging optical lens changes from the first state to the second state. Thereby, it helps to achieve the effect of close-up shooting and simplifies the complexity of the optical design and mechanism. Among them, the moving lens group can move toward the object side along the optical axis direction relative to the last lens group during the moving focusing process when the imaging optical lens changes from the first state to the second state. Please refer to Figure 1 , which is a schematic diagram showing the imaging optical lens in the imaging device according to the first embodiment of the present disclosure in the first state (infinite object distance) and in the second state (finite object distance) respectively, where Figure 1 The upper half of Figure 1 is a schematic diagram of the imaging optical lens in the first state, while

[0143] The lenses in the moving lens group can have no relative movement with respect to each other during the moving focusing process, and the lenses in the last lens group can have no relative movement with respect to each other during the moving focusing process. Thereby, the complexity of the mechanism can be simplified.

[0144] There may be no other interpolated lenses between the last lens group and the prism on the optical axis. And during the moving focusing process, the last lens group may have no relative movement with respect to the prism. Thereby, it helps to simplify the complexity of the mechanism design and is beneficial to improving the qualified rate of lens assembly.

[0145] The prism may have at least three reflecting surfaces; thereby, by the light being reflected multiple times inside the prism and imaging, it helps to reduce the overall volume of the imaging device. Among them, the prism may further have a first penetration surface. The at least three reflecting surfaces of the prism may sequentially include a first reflecting surface, a second reflecting surface, and a third reflecting surface along the optical path direction from the object side to the image side, and the first penetration surface and the second reflecting surface may be located in the same plane; thereby, it helps to simplify the structure of the prism and reduce the space required for the prism. Please refer to Fig.65 , which is a schematic diagram showing the configuration relationship and the optical path turning of the imaging device with one of the reflecting elements in the first state and in the second state according to the first embodiment of the present disclosure. As Fig.65 shown, the reflecting element E6 sequentially has a first penetration surface LP1, a first reflecting surface RF1, a second reflecting surface RF2, a third reflecting surface RF3, a fourth reflecting surface RF4, and a second penetration surface LP2 along the optical path direction, where the first penetration surface LP1 and the second reflecting surface RF2 are located in the same plane.

[0146] The lens closest to the object side in the moving lens group may have positive refractive power. Thereby, it helps to compress the volume and at the same time control the shooting angle and increase the light input.

[0147] For the lens closest to the object side in the moving lens group, its object-side surface can be convex at the paraxial region (i.e., for the lens closest to the object side in the imaging optical lens, its object-side surface can be convex at the paraxial region). Thereby, the surface shape of the lens closest to the object side can be adjusted, which helps to compress the outer diameter of the object-side end of the imaging optical lens.

[0148] The imaging optical lens disclosed in this disclosure may further include a reflection element, and the reflection element is located between the object to be photographed and the imaging surface along the optical path direction; thereby, different optical path directions can be provided for the imaging optical lens, making the spatial configuration of the lens more flexible, which helps to reduce the mechanical limitations and miniaturize the lens. Among them, the reflection element can be disposed between the lens closest to the image side and the imaging surface along the optical path direction. Among them, the reflection element can have at least two reflection surfaces; thereby, by allowing the light to be reflected and imaged multiple times inside the reflection element, it helps to reduce the overall volume of the imaging device.

[0149] When the imaging optical lens is in the first state, the distance on the optical axis from the object-side surface of the lens closest to the object side to the image-side surface of the lens closest to the image side is TDL, and when the imaging optical lens is in the second state, the distance on the optical axis from the object-side surface of the lens closest to the object side to the image-side surface of the lens closest to the image side is TDS, which can satisfy the following conditions: 1.00 < 10×|TDS - TDL| / TDL < 10.00. Thereby, by maintaining the movement amount of the moving lens group during the moving focusing process, it helps to photograph objects with smaller object distances and meet the requirements of large-size photosensitive element specifications, which helps to improve the imaging quality. Among them, the following conditions can also be satisfied: 1.20 < 10×|TDS - TDL| / TDL < 8.00. Among them, the following conditions can also be satisfied: 1.50 < 10×|TDS - TDL| / TDL < 6.00. Among them, the following conditions can also be satisfied: 1.80 < 10×|TDS - TDL| / TDL < 5.00. Among them, the following conditions can also be satisfied: 1.97 ≤ 10×|TDS - TDL| / TDL ≤ 4.02.

[0150] When the imaging optical lens is in the first state, the distance from the image-side surface of the lens closest to the image side to the imaging surface on the optical axis is BLL. When the imaging optical lens is in the second state, the distance from the image-side surface of the lens closest to the image side to the imaging surface on the optical axis is BLS. The following conditions can be satisfied: 0.80 < BLS / BLL < 1.30. Thus, during the moving focusing process, a relatively constant back focal length is maintained, which not only helps to simplify the complexity of the mechanism design, facilitating lens assembly and improving the qualified rate, but also helps to reduce the space required by the lens group, achieving space savings and at the same time having a long focal length telephoto effect. Among them, the following conditions can also be satisfied: 0.85 < BLS / BLL < 1.20. Among them, the following conditions can also be satisfied: 0.90 < BLS / BLL < 1.10. Among them, the following conditions can also be satisfied: 0.94 < BLS / BLL < 1.06. Among them, the following conditions can also be satisfied: 0.98 < BLS / BLL < 1.02. Among them, the following conditions can also be satisfied: 1.00 ≤ BLS / BLL ≤ 1.05.

[0151] When the imaging optical lens is in the first state, the distance from the object-side surface of the lens closest to the object side to the imaging surface on the optical axis is TLL. When the imaging optical lens is in the second state, the distance from the object-side surface of the lens closest to the object side to the imaging surface on the optical axis is TLS. The following conditions can be satisfied: 1.03 < TLS / TLL < 1.20. Thus, by controlling the total lens length during the moving focusing process, it helps to improve the image quality of objects with smaller object distances under the limitation of the size of the electronic device. Among them, the following conditions can also be satisfied: 1.04 < TLS / TLL < 1.15. Among them, the following conditions can also be satisfied: 1.05 < TLS / TLL < 1.10.

[0152] When the imaging optical lens is in the first state, the aperture value (F-number) is FnoL. When the imaging optical lens is in the second state, the aperture value is FnoS. The following conditions can be satisfied: 0.80 < FnoL / FnoS < 0.90. Thus, the depth of field and illuminance in long-distance shooting and close-up shooting can be balanced, and the light input amount can be increased to improve the image quality. Among them, the following conditions can also be satisfied: 0.85 < FnoL / FnoS < 0.90.

[0153] In one embodiment, when the object is located at an infinite object distance and the entrance pupil diameter of the imaging optical lens is at its minimum, the imaging optical lens is in a third state. The aperture value of the imaging optical lens in the first state is FnoL, and the aperture value of the imaging optical lens in the third state is FnoV, which can satisfy the following conditions: 0.50 < FnoV - FnoL < 1.20. Thereby, the amount of incident light of the imaging optical lens can be changed for different application states, which helps to provide diverse depths of field to achieve different image presentation effects. Among them, the following conditions can also be satisfied: 0.70 < FnoV - FnoL < 1.00. Please refer to Fig.25 , which is a schematic diagram showing the imaging optical lens in the imaging device according to the ninth embodiment of the present disclosure in the first state, the second state, and the third state respectively, where Fig.25 the upper part of is a schematic diagram of the imaging optical lens in the first state, Fig.25 the middle part of is a schematic diagram of the imaging optical lens in the second state, and Fig.25 the lower part of is a schematic diagram of the imaging optical lens in the third state.

[0154] The first lens may have a positive refractive power. Thereby, it helps to compress the volume and at the same time control the shooting angle of view and increase the amount of incident light.

[0155] The second lens may have a negative refractive power; thereby, the refractive power intensity of the first lens can be effectively balanced to avoid excessive light deflection angles and generate too many aberrations. The image-side surface of the second lens may be concave near the optical axis; thereby, the refractive power of the second lens can be adjusted, which helps to balance the spherical aberration generated in the imaging optical lens.

[0156] The object-side surface of the third lens may be convex near the optical axis; thereby, the object-side surface of the third lens can be provided with the ability to converge light to achieve the purpose of miniaturization. The image-side surface of the third lens may be concave near the optical axis; thereby, it can assist in balancing the back focal length of the imaging optical lens and at the same time correct off-axis aberrations.

[0157] The object-side surface of the fourth lens may be convex near the optical axis; thereby, the exit direction of light from the fourth lens can be adjusted, which helps to increase the imaging surface. The image-side surface of the fourth lens may be concave near the optical axis; thereby, it can balance the optical path and correct the spherical aberration generated in the imaging optical lens, which helps to maintain an appropriate back focal length.

[0158] The object-side surface of the fifth lens may be concave near the optical axis; thereby, the incident angle of light incident on the object-side surface of the fifth lens can be controlled to avoid excessive incident angles causing light divergence and poor relative illumination at the periphery. The image-side surface of the fifth lens may be convex near the optical axis; thereby, it can assist in balancing the back focal length of the imaging optical lens and at the same time correct off-axis aberrations.

[0159] At least one surface of at least one lens in the imaging optical lens may have at least one inflection point. Specifically, in the imaging optical lens, at least one surface of one or more lenses each has at least one inflection point, and the fact that at least one surface of the single lens has at least one inflection point means that at least one of the object-side surface and the image-side surface of this single lens has at least one inflection point; thereby, the degree of freedom of optical design can be increased to facilitate astigmatism correction. Among them, at least one surface of the third lens may have at least one inflection point; thereby, the angle of peripheral light on the object side of the third lens can be controlled to avoid vignetting at the periphery of the image and slow down distortion. Please refer to Fig.42 , which is a schematic diagram showing the inflection point P on the surface of some lenses in accordance with the first embodiment of the present disclosure. In Fig.42 , the image-side surface of the third lens E3, the object-side surface of the fourth lens E4, the image-side surface of the fourth lens E4, the object-side surface of the fifth lens E5, and the image-side surface of the fifth lens E5 each have an inflection point P. Fig.42 The first embodiment of the present disclosure is illustrated as an example. However, in other embodiments of the present disclosure, each lens may have one or more inflection points.

[0160] When the imaging optical lens is in the first state, the distance on the optical axis from the object-side surface of the lens closest to the object side to the image-side surface of the lens closest to the image side is TDL, and the distance on the optical axis from the image-side surface of the lens closest to the image side to the imaging surface when the imaging optical lens is in the first state is BLL, and the following conditions can be satisfied: 0.10 < TDL / BLL < 0.60. Thereby, an appropriate back focal length can be adjusted to facilitate optical path folding. Among them, the following conditions can also be satisfied: 0.20 < TDL / BLL < 0.45. Among them, the following conditions can also be satisfied: 0.23 < TDL / BLL < 0.42. Among them, the following conditions can also be satisfied: 0.26 ≤ TDL / BLL ≤ 0.39.

[0161] When the imaging optical lens is in the first state, the focal length is fL, the radius of curvature of the object-side surface of the fourth lens is R7, and the radius of curvature of the image-side surface of the fourth lens is R8, and the following conditions can be satisfied: 5.00 < fL / R7 + fL / R8 < 20.00. Thereby, the configuration of the total focal length, the radius of curvature of the object-side surface of the fourth lens, and the radius of curvature of the image-side surface of the fourth lens can be adjusted so that the imaging optical lens can maintain a smaller outer diameter and an appropriate back focal length when correcting off-axis aberrations. Among them, the following conditions can also be satisfied: 6.00 < fL / R7 + fL / R8 < 18.00. Among them, the following conditions can also be satisfied: 7.00 < fL / R7 + fL / R8 < 16.00. Among them, the following conditions can also be satisfied: 7.55 ≤ fL / R7 + fL / R8 ≤ 14.04.

[0162] The radius of curvature of the image-side surface of the first lens is R2, and the radius of curvature of the object-side surface of the fourth lens is R7, which can satisfy the following conditions: 0.55 < (R2 + R7) / (R2 - R7) < 1.60. Thereby, the radius of curvature of the image-side surface of the first lens and the radius of curvature of the object-side surface of the fourth lens can be effectively balanced, the traveling direction of peripheral light can be adjusted, which helps to correct astigmatism and reduce stray light in the imaging optical lens. Among them, the following conditions can also be satisfied: 0.60 < (R2 + R7) / (R2 - R7) < 1.40. Among them, the following conditions can also be satisfied: 0.64 ≤ (R2 + R7) / (R2 - R7) ≤ 1.12.

[0163] When the imaging optical lens is in the first state, the distance between the third lens and the fourth lens on the optical axis is T34L, and the thickness of the fourth lens on the optical axis is CT4, which can satisfy the following conditions: 0.10 < 10×T34L / CT4 < 5.00. Thereby, the distance between the third lens and the fourth lens and the central thickness of the fourth lens can be balanced, which helps to compress the volume and correct spherical aberration. Among them, the following conditions can also be satisfied: 0.30 < 10×T34L / CT4 < 3.00. Among them, the following conditions can also be satisfied: 0.50 < 10×T34L / CT4 < 2.00. Among them, the following conditions can also be satisfied: 0.60 < 10×T34L / CT4 < 1.60. Among them, the following conditions can also be satisfied: 0.70 ≤ 10×T34L / CT4 ≤ 1.29.

[0164] The radius of curvature of the object-side surface of the second lens is R3, and the radius of curvature of the image-side surface of the third lens is R6, which can satisfy the following conditions: -1.50 < (R3 - R6) / (R3 + R6) < 1.40. Thereby, the radius of curvature of the object-side surface of the second lens and the radius of curvature of the image-side surface of the third lens can be effectively balanced, which helps to improve the light-gathering quality of the imaging light, effectively improve the image bending situation and reduce spherical aberration. Among them, the following conditions can also be satisfied: -1.00 < (R3 - R6) / (R3 + R6) < 1.20. Among them, the following conditions can also be satisfied: -0.50 < (R3 - R6) / (R3 + R6) < 0.80. Among them, the following conditions can also be satisfied: -0.38 ≤ (R3 - R6) / (R3 + R6) ≤ 1.06.

[0165] The focal length of the first lens is f1, and the focal length of the second lens is f2, which can satisfy the following conditions: |f1 / f2| < 0.82. Thereby, the refractive powers of the first lens and the second lens can be balanced, which helps to balance the convergence or divergence of light and improve the light-gathering quality of the entire field of view. Among them, the following conditions can also be satisfied: 0.05 < |f1 / f2| < 0.75. Among them, the following conditions can also be satisfied: 0.10 < |f1 / f2| < 0.60. Among them, the following conditions can also be satisfied: 0.13 ≤ |f1 / f2| ≤ 0.72.

[0166] When the imaging optical lens is in the first state, the focal length is fL, and the combined focal length of the first lens and the second lens is f12, which can satisfy the following conditions: 0.50 < fL / f12 < 2.00. Thereby, the combined focal length of the moving lens group can be controlled, and during the moving focusing process, it helps to balance the moving amount and maintain the back focal length under a limited space configuration. Among them, the following conditions can also be satisfied: 0.80 < fL / f12 < 1.60.

[0167] The focal length of the third lens is f3, and the focal length of the fourth lens is f4, which can satisfy the following conditions: -2.00 < f4 / f3 < 0.10. Thereby, the refractive powers of the third lens and the fourth lens can be balanced, which helps to increase the symmetry of the imaging optical lens and reduce the spot size in the central field of view. Among them, the following conditions can also be satisfied: -1.50 < f4 / f3 < 0.00.

[0168] The thickness of the first lens on the optical axis is CT1, and the thickness of the second lens on the optical axis is CT2, which can satisfy the following conditions: 1.80 < CT1 / CT2 < 8.00. Thereby, the central thickness of the first lens and the ratio of the central thickness of the second lens can be controlled, which helps to take into account the process limitations of the first lens and reduce the volume of the imaging optical lens by adjusting the central thickness of the second lens. Among them, the following conditions can also be satisfied: 2.00 < CT1 / CT2 < 6.50.

[0169] When the imaging optical lens is in the first state, the distance from the object-side surface of the lens closest to the object side to the imaging surface on the optical axis is TLL, and the maximum imaging height of the imaging optical lens is ImgH (which can be half of the total length of the diagonal of the effective sensing area of the electronic photosensitive element), which can satisfy the following conditions: 5.50 < TLL / ImgH < 10.00. Thereby, the total length and the imaging height of the imaging optical lens can be balanced, which helps to compress the lens volume and form a telephoto structure. Among them, the following conditions can also be satisfied: 6.00 < TLL / ImgH < 9.00.

[0170] The Abbe number of the second lens is V2, the Abbe number of the fourth lens is V4, and the Abbe number of the fifth lens is V5, which can satisfy the following conditions: 30.0 < V2 + V4 + V5 < 93.0. Thereby, the material configuration of the second lens, the fourth lens and the fifth lens can be adjusted, which helps to correct the chromatic aberration during multi-distance shooting and improve the imaging quality. Among them, the following conditions can also be satisfied: 50.0 < V2 + V4 + V5 < 88.0.

[0171] When the optical lens for imaging is in the first state, the focal length is fL, and the focal length of the first lens is f1, which can satisfy the following conditions: 0.65 < fL / f1 < 2.00. Thereby, the refractive power intensity of the first lens can be adjusted, and by selecting the material of the first lens, it helps to reduce the influence of temperature effect on imaging while compressing the volume. Among them, the following conditions can also be satisfied: 1.00 < fL / f1 < 1.70.

[0172] When the optical lens for imaging is in the first state, the displacement of the intersection point of the object-side surface of the third lens on the optical axis to the position of the maximum effective radius of the object-side surface of the third lens parallel to the optical axis is Sag3R1L, and the thickness of the third lens on the optical axis is CT3, which can satisfy the following conditions: 0.80 < Sag3R1L / CT3 < 2.00. Thereby, the periphery of the third lens can be made to have the ability to control the beam direction, which helps to control the incident angle of light entering the imaging surface and avoid stray light generated after the light passes through the reflection element. Among them, the following conditions can also be satisfied: 1.00 < Sag3R1L / CT3 < 1.80. Please refer to Fig.43 , which is a schematic diagram showing the parameter Sag3R1L in the first embodiment of the present disclosure. Among them, if the displacement is in the image side direction, its value is positive, and if it is in the object side direction, its value is negative.

[0173] When the optical lens for imaging is in the first state, the maximum effective radius of the object-side surface of the first lens is Y1R1L, and the maximum effective radius of the image-side surface of the fifth lens when the optical lens for imaging is in the first state is Y5R2L, which can satisfy the following conditions: 1.00 < Y1R1L / Y5R2L < 2.00. Thereby, it helps to control the beam size and avoid the situation that the effective diameter of the lens is too large, resulting in difficulty for light to pass through the reflection element and affecting the imaging of the optical lens for imaging. Among them, the following conditions can also be satisfied: 1.30 < Y1R1L / Y5R2L < 1.80. Please refer to Fig.43 , which is a schematic diagram showing the parameters Y1R1L and Y5R2L in the first embodiment of the present disclosure.

[0174] When the imaging optical lens is in the first state, the spacing distance between the second lens and the third lens on the optical axis is T23L. When the imaging optical lens is in the first state, the displacement of the intersection point of the image-side surface of the second lens on the optical axis to the maximum effective radius position of the image-side surface of the second lens parallel to the optical axis is Sag2R2L. When the imaging optical lens is in the first state, the displacement of the intersection point of the object-side surface of the third lens on the optical axis to the maximum effective radius position of the object-side surface of the third lens parallel to the optical axis is Sag3R1L. When the imaging optical lens is in the first state, the maximum effective radius of the image-side surface of the second lens is Y2R2L, and it can satisfy the following condition: 0.05 < (T23L + Sag3R1L - Sag2R2L) / Y2R2L < 0.50. Thereby, the ratio of the shortest peripheral distance to the effective diameter between the two lens groups can be balanced, which helps to compress the volume and simplify the complexity of the mechanism design during the moving focusing process. Among them, the following condition can also be satisfied: 0.12 < (T23L + Sag3R1L - Sag2R2L) / Y2R2L < 0.35. Please refer to Fig.43 , which is a schematic diagram showing the parameters Sag2R2L, Sag3R1L, and Y2R2L in the first embodiment of the present disclosure. Among them, if the displacement is in the image-side direction, its value is positive, and if it is in the object-side direction, its value is negative.

[0175] When the imaging optical lens is in the first state, the spacing distance between the fourth lens and the fifth lens on the optical axis is T45L, and the thickness of the fifth lens on the optical axis is CT5, and it can satisfy the following condition: 1.00 < T45L / CT5 < 6.00. Thereby, by having a relatively large distance between the fourth lens and the fifth lens, it helps to balance the incident angle of light on the imaging surface during the moving focusing process and avoid the generation of stray light. Among them, the following condition can also be satisfied: 1.20 < T45L / CT5 < 4.50.

[0176] The thickness of the first lens on the optical axis is CT1. When the imaging optical lens is in the first state, the distance between the object-side surface of the third lens and the image-side surface of the fourth lens on the optical axis is Dr5r8L, and it can satisfy the following condition: 0.80 < CT1 / Dr5r8L < 3.50. Thereby, the central thickness of the first lens and the distance between the object-side surface of the third lens and the image-side surface of the fourth lens on the optical axis can be balanced, which helps to balance the spatial configuration of the object-side end lens group and the image-side end lens group and maintain high light-gathering quality during multi-segment object distance shooting. Among them, the following condition can also be satisfied: 1.00 < CT1 / Dr5r8L < 3.00.

[0177] When the imaging optical lens is in the first state, the distance between the third lens and the fourth lens on the optical axis is T34L, and the distance between the fourth lens and the fifth lens on the optical axis when the imaging optical lens is in the first state is T45L, which can satisfy the following conditions: 0.01 < 10×T34L / T45L < 3.00. Thereby, the ratio of the distance between the third lens and the fourth lens and the distance between the fourth lens and the fifth lens can be controlled, which helps to increase the design freedom and reduce the manufacturing tolerance. Among them, the following conditions can also be satisfied: 0.10 < 10×T34L / T45L < 2.00. Among them, the following conditions can also be satisfied: 0.15 < 10×T34L / T45L < 0.60.

[0178] When the imaging optical lens is in the first state, the distance from the image-side surface of the lens closest to the image side to the imaging surface on the optical axis is BLL, and the maximum imaging height of the imaging optical lens is ImgH, which can satisfy the following conditions: 4.20 < BLL / ImgH < 7.20. Thereby, the imaging optical lens has sufficient back focal length to place other optical elements, and at the same time, the angle of light incident on the imaging surface is controlled to ensure the peripheral brightness of the image. Among them, the following conditions can also be satisfied: 4.50 < BLL / ImgH < 7.00.

[0179] When the imaging optical lens is in the first state, the focal length is fL, and the focal length of the third lens is f3, which can satisfy the following conditions: |fL / f3| < 1.80. Thereby, the refractive power intensity of the third lens can be adjusted, which helps to balance the refractive power distribution of the object-side lens group and the image-side lens group, so as to reduce the system sensitivity during the moving focusing process. Among them, the following conditions can also be satisfied: 0.20 < |fL / f3| < 1.50.

[0180] When the imaging optical lens is in the first state, the distance between the fourth lens and the fifth lens on the optical axis is T45L, and the thickness of the fourth lens on the optical axis is CT4, which can satisfy the following conditions: 0.50 < T45L / CT4 < 6.00. Thereby, the center thickness of the fourth lens and the distance between the fourth lens and the fifth lens can be balanced, which helps to increase the space utilization efficiency. Among them, the following conditions can also be satisfied: 0.75 < T45L / CT4 < 4.50.

[0181] The imaging optical lens disclosed in the present disclosure may further include a diaphragm; thereby, an appropriate light entrance aperture of the imaging optical lens can be ensured, and at the same time, the viewing angle can be controlled, thereby achieving a telephoto shooting effect. Among them, the diaphragm may have a major axis direction and a minor axis direction that are perpendicular to the optical axis and different from each other, and the effective radius of the diaphragm in the major axis direction is different from the effective radius of the diaphragm in the minor axis direction; thereby, the shape of the diaphragm can be adjusted, which helps to reduce stray light. For example, please refer to Fig.44 and Fig.45, is a schematic diagram showing a non-circular aperture according to the present disclosure, wherein Fig.44 is a schematic diagram showing a shape configuration of an aperture according to the present disclosure, and Fig.45 is a schematic diagram showing another shape configuration of an aperture according to the present disclosure. As Fig.44 shown, in some embodiments of the present disclosure, the shape of the aperture ST is an ellipse, which has a major axis direction LX and a minor axis direction SY perpendicular to the optical axis OA. The major axis direction LX and the minor axis direction SY are different directions, and the effective radius Ra of the aperture ST in the major axis direction LX is greater than the effective radius Rb of the aperture ST in the minor axis direction SY. As Fig.45 shown, in some embodiments of the present disclosure, the shape of the aperture ST has a trimmed edge at the outer diameter, which has a major axis direction LX and a minor axis direction SY perpendicular to the optical axis OA. The major axis direction LX and the minor axis direction SY are different directions, and the effective radius Ra of the aperture ST in the major axis direction LX is greater than the effective radius Rb of the aperture ST in the minor axis direction SY.

[0182] All the technical features in the imaging optical lens disclosed in the present disclosure can be combined and configured to achieve the corresponding effects.

[0183] In the imaging optical lens disclosed in the present disclosure, 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 optical lens can be increased, and the influence of the external environmental temperature change on imaging can be reduced. The glass lens can be made by techniques such as grinding or molding. If the lens material is plastic, the production cost can be effectively reduced. In addition, a spherical surface (SPH) or an aspherical surface (ASP) can be provided on the lens surface. The spherical lens can reduce the manufacturing difficulty. If an aspherical surface is provided on the lens surface, more control variables can be obtained thereby to reduce aberration, reduce the number of lenses, and effectively reduce the total length of the imaging optical lens disclosed in the present disclosure. Further, the aspherical surface can be made by methods such as plastic injection molding or molding of glass lenses.

[0184] In the imaging optical lens disclosed in the present disclosure, 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.

[0185] In the imaging optical lens disclosed in the present disclosure, additives can be selectively added to any (or more) lens materials to produce light absorption or light interference effects, so as to change the light transmittance of the lens for light in a specific wavelength band, thereby reducing stray light and chromatic aberration. For example, the additive can have the function of filtering light in the wavelength band of 600 nm to 800 nm in the system, which helps to reduce excess red light or infrared light; or it can filter light in the wavelength band of 350 nm to 450 nm to reduce excess blue light or ultraviolet light. Therefore, the additive can prevent light in a specific wavelength band from interfering with imaging. In addition, the additive can be uniformly mixed in the plastic and made into a lens by injection molding technology. In addition, the additive can also be configured on the coating on the lens surface to provide the above effects.

[0186] In the imaging optical lens disclosed in the present disclosure, 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 on 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 on the lens surface. If the refractive power or focal length of the lens does not define its regional position, 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.

[0187] In the imaging optical lens disclosed in the present disclosure, the inflection point of the lens surface refers to the intersection point where the positive and negative curvatures of the lens surface change. The critical point of the lens surface refers to the tangent point on the tangent line where the plane perpendicular to the optical axis is tangent to the lens surface, and the critical point is not located on the optical axis.

[0188] In the imaging optical lens disclosed in the present disclosure, depending on the corresponding electronic photosensitive element, the imaging surface of the imaging optical lens can be a plane or a curved surface with any curvature, especially a curved surface with the concave surface facing the object side direction.

[0189] In the imaging optical lens disclosed in the present disclosure, one or more imaging correction elements (such as flat field elements) can be selectively arranged between the lens closest to the imaging surface on the imaging optical path and the imaging surface to achieve the effect of correcting the image (such as image curvature, etc.). The optical properties of the imaging correction element, such as curvature, thickness, refractive index, position, surface type (convex or concave, spherical or aspherical, diffractive surface, Fresnel surface, etc.) can be adjusted according to the requirements of the imaging device. Generally speaking, a better configuration of the imaging correction element is to arrange a thin plano-concave element with the concave surface facing the object side near the imaging surface.

[0190] The optical lens for imaging disclosed in this disclosure may include at least one reflective element, such as a prism or a reflective mirror, etc. Among them, the surface of the prism or the reflecting surface of the mirror may be a plane, a spherical surface, an aspherical surface or a free-form surface, etc., so as to provide a more flexible spatial configuration for the optical lens for imaging. The reflective element may be disposed between the object to be photographed and the imaging surface, which is beneficial to reducing the volume of the optical lens for imaging. The optical path may be reflected by the reflective element at least once, and the included angle between the normal direction of the reflecting surface and the optical axis is not limited to 45 degrees, and may have other angles according to requirements such as spatial configuration. The reflective element may turn the optical path from the optical axis at the near-object side end to the optical axis at the near-image side end. The included angle between the optical axis vector at the near-object side end and the optical axis vector at the near-image side end may be any angle, not limited to 0, 90 or 180 degrees. In addition, for reasons such as reducing the occupied volume, the length and width of the mirror may not be equal, and the length, width and height of the prism may also not be equal to each other. The surface shape of the reflective element (for example, the surface shape of the prism surface or the reflecting surface of the mirror) may be a plane, a spherical surface, an aspherical surface or a free-form surface, etc. according to optical design requirements, etc., but this disclosure is not limited thereto. The reflective element may be composed of more than one prism according to design requirements. The prism may be made of materials such as glass or plastic according to design requirements. In addition, the prism with the function of turning the optical path is not counted among the lenses, that is to say, the lenses of the optical lens for imaging do not include the prism with the function of turning the optical path.

[0191] For further illustration, please refer to Figure 46 to Figure 48 , which respectively show a schematic diagram of a configuration relationship of a reflective element in an optical lens for imaging according to this disclosure. As Figure 46 to Figure 48 shown, the optical lens for imaging may sequentially include a reflective element LF, a lens group LG, a filter element FT, and an imaging surface IMG along the optical path direction from the object to be photographed (not shown) to the imaging surface IMG.

[0192] In Fig.46 , the reflective element LF is a prism, which sequentially has a first penetration surface LP1, a reflective surface RF1, and a second penetration surface LP2 along the optical path. The optical path passes through the first penetration surface LP1 along the first optical axis OA1 to the reflective surface RF1, and the reflective surface RF1 turns the optical path from the first optical axis OA1 to the second optical axis OA2, and the optical path passes through the second penetration surface LP2 along the second optical axis OA2 and then passes through the lens group LG and the filter element FT, and reaches the imaging surface IMG. As Fig.46 shown, the first penetration surface LP1 and the first penetration surface LP2 of the reflective element LF may both be planes.

[0193] In Fig.47In [the figure], the reflection element LF is a plane mirror having a reflecting surface RF1. The optical path travels along the first optical axis OA1 to the reflecting surface RF1, and the reflecting surface RF1 deflects the optical path from the first optical axis OA1 to the second optical axis OA2. The optical path then travels along the second optical axis OA2 through the lens group LG and the filter element FT, and reaches the imaging surface IMG.

[0194] In Fig.48 [the figure], the reflection element LF is a prism which sequentially has a first penetration surface LP1, a reflecting surface RF1, and a second penetration surface LP2 along the direction of the optical path. The optical path passes through the first penetration surface LP1 along the first optical axis OA1 to the reflecting surface RF1, and the reflecting surface RF1 deflects the optical path from the first optical axis OA1 to the second optical axis OA2. The optical path then passes through the second penetration surface LP2 along the second optical axis OA2 and then through the lens group LG and the filter element FT, and reaches the imaging surface IMG. As Fig.48 shown, the first penetration surface LP1 and the second penetration surface LP2 of the reflection element LF may both be curved surfaces.

[0195] In addition, please refer to Fig.49 and Fig.50 , which respectively show schematic diagrams of a configuration relationship of two reflection elements in an imaging optical lens according to the present disclosure. As Fig.49 and Fig.50 shown, the imaging optical lens may sequentially include a first reflection element LF1, a lens group LG, a filter element FT, a second reflection element LF2, and an imaging surface IMG along the direction of the optical path from the object (not shown) to the imaging surface IMG. The optical path reaches the first reflecting surface RF1 of the first reflection element LF1 along the first optical axis OA1, and the first reflecting surface RF1 deflects the optical path from the first optical axis OA1 to the second optical axis OA2. The optical path passes through the lens group LG and the filter element FT along the second optical axis OA2. Then, the optical path reaches the second reflecting surface RF2 of the second reflection element LF2 along the second optical axis OA2, and the second reflecting surface RF2 deflects the optical path from the second optical axis OA2 to the third optical axis OA3. The optical path reaches the imaging surface IMG along the third optical axis OA3. In Fig.49 [the figure], the first reflection element LF1 and the second reflection element LF2 may both be prisms. In Fig.50 [the figure], the first reflection element LF1 and the second reflection element LF2 may be a prism and a plane mirror respectively.

[0196] In addition, please refer to Figure 51 to Figure 54 , in which Fig.51 shows a schematic diagram of a configuration relationship of a double reflection element in an imaging optical lens according to the present disclosure, Fig.52 shows a schematic diagram of a configuration relationship of a triple reflection element in an imaging optical lens according to the present disclosure, Fig.53Schematic diagram showing a configuration relationship of a four-reflection element in an imaging optical lens according to the present disclosure, and Fig.54 Schematic diagram showing a configuration relationship of a five-reflection element in an imaging optical lens according to the present disclosure.

[0197] As Fig.51 shown, the imaging optical lens may sequentially include a lens group LG, a filter element FT, a reflection element LF, and an imaging surface IMG along the optical path direction from an object (not shown) to the imaging surface IMG. The reflection element LF may be a prism, which sequentially has a first penetration surface LP1, a first reflection surface RF1, a second reflection surface RF2, and a second penetration surface LP2 along the optical path. The optical path passes through the lens group LG, the filter element FT, and the first penetration surface LP1 along the first optical axis OA1 to the first reflection surface RF1, the first reflection surface RF1 deflects the optical path from the first optical axis OA1 to the second optical axis OA2, the second reflection surface RF2 deflects the optical path from the second optical axis OA2 to the third optical axis OA3, and the optical path passes through the second penetration surface LP2 along the third optical axis OA3 to the imaging surface IMG.

[0198] As Fig.52 shown, the imaging optical lens may sequentially include a lens group LG, a filter element FT, a reflection element LF, and an imaging surface IMG along the optical path direction from an object (not shown) to the imaging surface IMG. The reflection element LF may be a prism, which sequentially has a first penetration surface LP1, a first reflection surface RF1, a second reflection surface RF2, a third reflection surface RF3, and a second penetration surface LP2 along the optical path. The optical path passes through the lens group LG, the filter element FT, and the first penetration surface LP1 along the first optical axis OA1 to the first reflection surface RF1, the first reflection surface RF1 deflects the optical path from the first optical axis OA1 to the second optical axis OA2, the second reflection surface RF2 deflects the optical path from the second optical axis OA2 to the third optical axis OA3, the third reflection surface RF3 deflects the optical path from the third optical axis OA3 to the fourth optical axis OA4, and the optical path passes through the second penetration surface LP2 along the fourth optical axis OA4 to the imaging surface IMG. Among them, the first penetration surface LP1 and the second reflection surface RF2 may be the same plane.

[0199] As Fig.53As shown, the optical lens for imaging can be arranged from the object (not shown) to the imaging surface IMG along the optical path direction, and sequentially includes a lens group LG, a reflection element LF, a filter element FT, and an imaging surface IMG. The reflection element LF can be a prism, which sequentially has a first penetration surface LP1, a first reflection surface RF1, a second reflection surface RF2, a third reflection surface RF3, a fourth reflection surface RF4, and a second penetration surface LP2 along the optical path. The optical path passes through the lens group LG and the first penetration surface LP1 along the first optical axis OA1 to the first reflection surface RF1, and the first reflection surface RF1 deflects the optical path from the first optical axis OA1 to the second optical axis OA2. The second reflection surface RF2 deflects the optical path from the second optical axis OA2 to the third optical axis OA3. The third reflection surface RF3 deflects the optical path from the third optical axis OA3 to the fourth optical axis OA4. The fourth reflection surface RF4 deflects the optical path from the fourth optical axis OA4 to the fifth optical axis OA5, and the optical path passes through the second penetration surface LP2 and the filter element FT along the fifth optical axis OA5 to the imaging surface IMG. Among them, the first penetration surface LP1 and the second reflection surface RF2 can be the same plane.

[0200] As Fig.54 shown, the optical lens for imaging can be arranged from the object (not shown) to the imaging surface IMG along the optical path direction, and sequentially includes a lens group LG, a reflection element LF, a filter element FT, and an imaging surface IMG. The reflection element LF can be a prism, which sequentially has a first penetration surface LP1, a first reflection surface RF1, a second reflection surface RF2, a third reflection surface RF3, a fourth reflection surface RF4, a fifth reflection surface RF5, and a second penetration surface LP2 along the optical path. The optical path passes through the lens group LG and the first penetration surface LP1 along the first optical axis OA1 to the first reflection surface RF1, and the first reflection surface RF1 deflects the optical path from the first optical axis OA1 to the second optical axis OA2. The second reflection surface RF2 deflects the optical path from the second optical axis OA2 to the third optical axis OA3. The third reflection surface RF3 deflects the optical path from the third optical axis OA3 to the fourth optical axis OA4. The fourth reflection surface RF4 deflects the optical path from the fourth optical axis OA4 to the fifth optical axis OA5. The fifth reflection surface RF5 deflects the optical path from the fifth optical axis OA5 to the sixth optical axis OA6, and the optical path passes through the second penetration surface LP2 and the filter element FT along the sixth optical axis OA6 to the imaging surface IMG. Among them, the first penetration surface LP1 and the second reflection surface RF2 can be the same plane.

[0201] In addition, please refer to Fig.55 and Fig.56 where Fig.55 shows a schematic diagram of a configuration relationship of a reflection element in an optical lens for imaging according to the present disclosure, and Fig.56 shows a schematic diagram of a configuration relationship of another reflection element in an optical lens for imaging according to the present disclosure. As Fig.55 and Fig.56As shown, the optical lens for imaging can sequentially include a lens group LG, a reflection element LF, a filter element FT, and an imaging surface IMG along the optical path direction from the object (not shown) to the imaging surface IMG. The reflection element LF can be a pentaprism, which sequentially has a first penetration surface LP1, a first reflection surface RF1, a second reflection surface RF2, and a second penetration surface LP2 along the optical path. The optical path passes through the first penetration surface LP1 to the first reflection surface RF1 along the first optical axis OA1. The first reflection surface RF1 deflects the optical path from the first optical axis OA1 to the second optical axis OA2. The second reflection surface RF2 deflects the optical path from the second optical axis OA2 to the third optical axis OA3. And the optical path passes through the second penetration surface LP2 and the filter element FT to the imaging surface IMG along the third optical axis OA3. In Fig.55 both the first penetration surface LP1 and the second penetration surface LP2 can be flat surfaces. In Fig.56 both the first penetration surface LP1 and the second penetration surface LP2 can be curved surfaces. In addition, as shown in Fig.55 and Fig.56 the first optical axis OA1 and the third optical axis OA3 can, for example, intersect and be perpendicular to each other.

[0202] In addition, for reasons such as reducing the occupied volume, the length and width of the mirror can be unequal, and the length, width, and height of the prism can also be unequal to each other. And trimming edges or grooves can be designed in the non-optical effective diameter area to reduce weight, reduce volume, and match the configuration of internal components of the electronic device. Additionally, a light absorption coating can be disposed on the surface of the groove to achieve the effects of anti-reflection and stray light shielding. Please refer to Figure 67 to Figure 69 where Fig.67 shows a schematic diagram of one implementation form of the reflection element according to the first embodiment of the present disclosure, Fig.68 shows Fig.67 a three-dimensional schematic diagram of the reflection element of Fig.69 without trimming edges and grooves formed, and Fig.67 shows a three-dimensional schematic diagram of the reflection element of Fig.67 and Fig.68 formed with trimming edges and grooves. As shown in Fig.67 and Fig.68 it can be seen that the reflection element E6 has a non-optical effective diameter area NPR, that is, the imaging light rays do not pass through the non-optical effective diameter area NPR in the reflection element E6. Therefore, in the design, a part of the non-optical effective diameter area NPR of the reflection element E6 in Fig.69 can be removed, so that the reflection element E6 is formed into a shape with trimming edges CP and grooves RP (as shown in

[0203] The optical lens for imaging disclosed in the present disclosure can also selectively be configured with more than three reflection elements. Therefore, the present disclosure is not limited to the types, quantities, and positions of the reflection elements disclosed in the drawings.

[0204] In the optical lens for imaging disclosed in the present disclosure, at least one aperture stop may be provided, which may be located in front of the first lens, between each lens, or behind the last lens. The types of the aperture stop include, for example, a glare stop or a field stop, etc., which can be used to reduce stray light and help improve the image quality.

[0205] In the optical lens for imaging disclosed in the present disclosure, the aperture configuration can be a front aperture or a middle aperture. Among them, the front aperture means that the aperture is set between the object to be photographed and the first lens, and the middle aperture means that the aperture is set between the first lens and the imaging surface. If the aperture is a front aperture, it can make the exit pupil have a longer distance from the imaging surface, making it have a telecentric effect, and can increase the efficiency of the CCD or CMOS of the electronic photosensitive element to receive images; if it is a middle aperture, it helps to expand the field of view angle of the optical lens for imaging.

[0206] The present disclosure can appropriately set a variable aperture element, which can be a mechanical component or a light control element, and its aperture size and shape can be controlled by electricity or an electrical signal. The mechanical component can include movable parts such as a blade group and a shielding plate; the light control element can include shielding materials such as a filter element, an electrochromic material, and a liquid crystal layer. The variable aperture element can strengthen the image adjustment ability by controlling the light incident amount or exposure time of the image. In addition, the variable aperture element can also be the aperture of the present disclosure, and the image quality can be adjusted by changing the aperture value, such as the depth of field or the exposure speed, etc.

[0207] The present disclosure can appropriately place one or more optical elements to limit the form of light passing through the optical lens for imaging. The optical elements can be, for example, a filter, a polarizer, etc., but the present disclosure is not limited thereto. And the optical elements can be a single element, a composite component, or presented in the form of a thin film, etc., but the present disclosure is not limited thereto. The optical elements can be placed at the object end, the image end, or between the lenses of the optical lens for imaging to control the passage of specific forms of light, thereby meeting the application requirements.

[0208] In the optical lens for imaging disclosed in the present disclosure, it may include at least one optical lens, optical element or carrier, at least one surface of which has a low-reflection layer, and the low-reflection layer can effectively reduce the stray light generated by light reflection at the interface. The low-reflection layer can be disposed in the non-effective area of the object-side surface or the image-side surface of the optical lens, or on the connecting surface between the object-side surface and the image-side surface; the optical element can be a light-shielding element, an annular spacer element, a lens barrel element, a cover glass, a blue glass, a filter, a color filter, an optical path turning element (reflective element), a prism or a mirror, etc.; the carrier can be a lens group mount, a microlens disposed on a photosensitive element, the periphery of a photosensitive element substrate or a glass sheet for protecting the photosensitive element, etc.

[0209] In the optical lens for imaging disclosed in the present disclosure, the object side and the image side are determined according to the optical axis direction, and the data on the optical axis is calculated along the optical axis. And when the optical axis is turned by an optical path turning element (such as a reflective element), the data on the optical axis is also calculated along the optical axis.

[0210] According to the above embodiments, specific embodiments are proposed below and will be described in detail with reference to the accompanying drawings.

[0211] <First Embodiment>

[0212] Please refer to Figures 1 to 3 where Figure 1 shows schematic diagrams of an imaging device according to the first embodiment of the present disclosure in a first state and in a second state respectively. Figure 2 From left to right are the spherical aberration, astigmatism and distortion curves of the imaging device of the first embodiment in the first state, and Figure 3 from left to right are the spherical aberration, astigmatism and distortion curves of the imaging device of the first embodiment in the second state. Among them, Figure 1 the upper half of Figure 1 is a schematic diagram of the optical lens for imaging in the first state, and Figure 1It can be seen that the imaging device 1 includes an optical lens for imaging (not labeled) and an electronic photosensitive element IS. The optical lens for imaging includes an aperture S1, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, an aperture S2, a reflective element E6, a filter element (Filter) E7 and an imaging surface IMG in order from the object side to the image side along the optical path. Further, the optical lens for imaging includes a moving lens group Gm and a final lens group Gn in order from the object side to the image side along the direction of the optical path, wherein the moving lens group Gm includes a first lens E1 and a second lens E2, and the final lens group Gn includes a third lens E3, a fourth lens E4 and a fifth lens E5. The electronic photosensitive element IS is disposed on the imaging surface IMG. The optical lens for imaging includes five lenses (E1, E2, E3, E4, E5), and there are no other interpolated lenses between the lenses. In addition, there is no other interpolated lens between the last lens group Gn and the reflective element E6 on the optical axis.

[0213] During the moving focusing process, the distance between the two lens groups (Gm, Gn) is changed to adjust the focal length of the imaging optical lens. Figure 1 It can be seen that the moving lens group Gm moves along the optical axis relative to the final lens group Gn during the moving focusing process. Figure 1 The first state shown in the upper part or Figure 1 The second state is shown in the lower part. The imaging optical lens being in the first state refers to the state of the imaging optical lens when the object is at an infinite object distance and the entrance pupil diameter of the imaging optical lens is at its maximum; the imaging optical lens being in the second state refers to the state of the imaging optical lens when the object is at a finite object distance. Among them, the mobile lens group Gm moves toward the object side along the optical axis relative to the last lens group Gn during the mobile focusing process when the imaging optical lens is transformed from the first state to the second state. It should be noted that the lenses in the mobile lens group Gm do not move relative to each other during the mobile focusing process, and the lenses in the last lens group Gn do not move relative to each other during the mobile focusing process. In addition, during the mobile focusing process, the reflective element E6 does not move relative to the last lens group Gn.

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

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

[0216] The third lens E3 has a 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, and its image-side surface has an inflection point.

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

[0218] The fifth lens E5 has a positive refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical. Its object-side surface has an inflection point, and its image-side surface has an inflection point.

[0219] The reflecting element E6 is made of glass. It is disposed between the fifth lens E5 and the imaging surface IMG along the optical axis direction and does not affect the focal length of the imaging optical lens. The reflecting element E6 is a prism and has a function of deflecting the optical path. For the convenience of description, Figure 1 the deflection effect of the reflecting element E6 on the optical path is omitted from the drawing. However, the reflecting element E6 can have various different forms according to actual design requirements, so as to cause different deflection effects on the optical path. For example, please refer to Figures 57 to 63 which is a schematic diagram showing the configuration relationship and optical path turning of the imaging device with various different reflecting elements according to the first embodiment of the present disclosure.

[0220] In Figure 57 to Figure 59 the reflecting element E6 sequentially has a first penetration surface LP1, a first reflecting surface RF1, a second reflecting surface RF2, and a second penetration surface LP2 along the direction of the optical path. The first reflecting surface RF1 deflects the optical path from the first optical axis OA1 to the second optical axis OA2, and the second reflecting surface RF2 deflects the optical path from the second optical axis OA2 to the third optical axis OA3, and the optical path reaches the imaging surface IMG along the third optical axis OA3. In Figure 57 to Figure 59 the reflecting element E6 deflects the optical path twice. Among them, Fig.57 the first penetration surface LP1 and the second penetration surface LP2 of are in the same plane. The normal direction of the first reflecting surface RF1 can be 45.0 degrees with respect to both the first optical axis OA1 and the second optical axis OA2, and the normal direction of the second reflecting surface RF2 can be 45.0 degrees with respect to both the second optical axis OA2 and the third optical axis OA3, so that the angle between the optical axis vector of the near object end (the first optical axis OA1) and the optical axis vector of the near image end (the third optical axis OA3) can be 180 degrees. Fig.58The first penetration surface LP1 and the second penetration surface LP2 are parallel to each other and non-coplanar. The normal direction of the first reflection surface RF1 can be 42.0 degrees with respect to both the first optical axis OA1 and the second optical axis OA2, and the normal direction of the second reflection surface RF2 can be 48.0 degrees with respect to both the second optical axis OA2 and the third optical axis OA3, such that the angle between the optical axis vector (the first optical axis OA1) at the near object end and the optical axis vector (the third optical axis OA3) at the near image end can be 180 degrees. Fig.59 The first penetration surface LP1 and the second penetration surface LP2 are not parallel to each other and non-coplanar. The normal direction of the first reflection surface RF1 can be 47.0 degrees with respect to both the first optical axis OA1 and the second optical axis OA2, and the normal direction of the second reflection surface RF2 can be 55.6 degrees with respect to both the second optical axis OA2 and the third optical axis OA3, such that an obtuse angle is formed between the optical axis vector (the first optical axis OA1) at the near object end and the optical axis vector (the third optical axis OA3) at the near image end.

[0221] In Fig.60 , the reflecting element E6 is a pentaprism, which sequentially has a first penetration surface LP1, a first reflection surface RF1, a second reflection surface RF2, and a second penetration surface LP2 along the optical path. The first reflection surface RF1 deflects the optical path from the first optical axis OA1 to the second optical axis OA2, the second reflection surface RF2 deflects the optical path from the second optical axis OA2 to the third optical axis OA3, and the optical path reaches the imaging surface IMG along the third optical axis OA3. In Fig.60 , the reflecting element E6 deflects the optical path twice. The normal direction of the first reflection surface RF1 can be 23.5 degrees with respect to both the first optical axis OA1 and the second optical axis OA2, and the normal direction of the second reflection surface RF2 can be 21.5 degrees with respect to both the second optical axis OA2 and the third optical axis OA3, such that the angle between the optical axis vector (the first optical axis OA1) at the near object end and the optical axis vector (the third optical axis OA3) at the near image end can be 90 degrees.

[0222] In Fig.61 and Fig.62 , the reflecting element E6 sequentially has a first penetration surface LP1, a first reflection surface RF1, a second reflection surface RF2, a third reflection surface RF3, and a second penetration surface LP2 along the optical path. The first reflection surface RF1 deflects the optical path from the first optical axis OA1 to the second optical axis OA2, the second reflection surface RF2 deflects the optical path from the second optical axis OA2 to the third optical axis OA3, the third reflection surface RF3 deflects the optical path from the third optical axis OA3 to the fourth optical axis OA4, and the optical path reaches the imaging surface IMG along the fourth optical axis OA4. In Fig.61 and Fig.62 , the reflecting element E6 deflects the optical path three times. Among them, Fig.61The first penetration surface LP1, the second reflection surface RF2, and the second penetration surface LP2 therein are all located in the same plane. The normal directions of the first reflection surface RF1 with respect to the first optical axis OA1 and the second optical axis OA2 can both be 30.0 degrees. The normal directions of the second reflection surface RF2 with respect to the second optical axis OA2 and the third optical axis OA3 can both be 60.0 degrees. And the normal directions of the third reflection surface RF3 with respect to the third optical axis OA3 and the fourth optical axis OA4 can both be 30.0 degrees, so that the included angle between the optical axis vector (the first optical axis OA1) at the near object end and the optical axis vector (the fourth optical axis OA4) at the near image end can be 180 degrees. Fig.62 The first penetration surface LP1 and the second penetration surface LP2 of Fig.62 are not parallel to each other and are non-coplanar. The normal directions of the first reflection surface RF1 with respect to the first optical axis OA1 and the second optical axis OA2 can both be 40.0 degrees. The normal directions of the second reflection surface RF2 with respect to the second optical axis OA2 and the third optical axis OA3 can both be 55.0 degrees. And the normal directions of the third reflection surface RF3 with respect to the third optical axis OA3 and the fourth optical axis OA4 can both be 27.5 degrees, so that an obtuse angle is formed between the optical axis vector (the first optical axis OA1) at the near object end and the optical axis vector (the fourth optical axis OA4) at the near image end.

[0223] In Fig.63 In Fig.63 , the reflection element E6 sequentially has a first penetration surface LP1, a first reflection surface RF1, a second reflection surface RF2, a third reflection surface RF3, a fourth reflection surface RF4, and a second penetration surface LP2 along the optical path. The first reflection surface RF1 deflects the optical path from the first optical axis OA1 to the second optical axis OA2. The second reflection surface RF2 deflects the optical path from the second optical axis OA2 to the third optical axis OA3. The third reflection surface RF3 deflects the optical path from the third optical axis OA3 to the fourth optical axis OA4. The fourth reflection surface RF4 deflects the optical path from the fourth optical axis OA4 to the fifth optical axis OA5. And the optical path reaches the imaging surface IMG along the fifth optical axis OA5. In Fig.63 In Fig.63 , the reflection element E6 deflects the optical path four times. Among them, the normal directions of the first reflection surface RF1 with respect to the first optical axis OA1 and the second optical axis OA2 can both be 28.0 degrees. The normal directions of the second reflection surface RF2 with respect to the second optical axis OA2 and the third optical axis OA3 can both be 56.0 degrees. The normal directions of the third reflection surface RF3 with respect to the third optical axis OA3 and the fourth optical axis OA4 can both be 56.0 degrees. And the normal directions of the fourth reflection surface RF4 with respect to the fourth optical axis OA4 and the fifth optical axis OA5 can both be 28.0 degrees, so that the included angle between the optical axis vector (the first optical axis OA1) at the near object end and the optical axis vector (the fifth optical axis OA5) at the near image end can be 0 degrees. Further, the reflection element E6 of this embodiment can also, for example, have a structure similar to Fig.54 and can deflect the optical path five times, and reference can be made to the corresponding Fig.54The description thereof will not be elaborated herein.

[0224] The filter element E7 is made of glass and is disposed between the reflecting element E6 and the imaging surface IMG, and does not affect the focal length of the imaging optical lens.

[0225] The aspheric curve equations of the above lenses are expressed as follows:

[0226]

[0227] X: The displacement parallel to the optical axis from the intersection of the aspheric surface and the optical axis to the point on the aspheric surface at a distance Y from the optical axis;

[0228] Y: The perpendicular distance from the point on the aspheric curve to the optical axis;

[0229] R: The radius of curvature;

[0230] k: The conic coefficient; and

[0231] Ai: The i-th order aspheric coefficient.

[0232] In the imaging optical lens of the first embodiment, the first lens E1 is the lens closest to the object side, and the fifth lens E5 is the lens closest to the image side.

[0233] The focal length of the imaging optical lens in the first state is fL, the aperture value of the imaging optical lens in the first state is FnoL, and half of the maximum viewing angle of the imaging optical lens in the first state is HFOVL. The values are as follows: fL = 16.43 millimeters (mm), FnoL = 2.80, HFOVL = 9.7 degrees (deg.).

[0234] The focal length of the imaging optical lens in the second state is fS, the aperture value of the imaging optical lens in the second state is FnoS, and half of the maximum viewing angle of the imaging optical lens in the second state is HFOVS. The values are as follows: fS = 15.95 millimeters, FnoS = 3.17, HFOVS = 8.6 degrees.

[0235] The distance on the optical axis between the object and the object-side surface of the lens closest to the object side in the imaging optical lens is the object distance. The distance on the optical axis between the object and the aperture S1 is D0, and the distance on the optical axis between the surface closest to the image side of the moving lens group Gm and the surface closest to the object side of the last lens group Gn is D1. In this embodiment, the object distance is the distance on the optical axis between the object and the object-side surface of the first lens E1, and D1 is the distance on the optical axis between the image-side surface of the second lens E2 and the object-side surface of the third lens E3. When the imaging optical lens is in the first state and the second state through the focusing movement process, the numerical values of the object distance, D0, and D1 will be different. When the imaging optical lens is in the first state, it satisfies the following conditions: object distance = ∞ (infinity); D0 = ∞ (infinity); and D1 = 0.364 mm. When the imaging optical lens is in the second state, it satisfies the following conditions: object distance = 149.556 mm; D0 = 150.517 mm; and D1 = 2.023 mm.

[0236] When the imaging optical lens is in the first state, the maximum viewing angle is FOVL, and it satisfies the following condition: FOVL = 19.4 degrees.

[0237] When the imaging optical lens is in the second state, the maximum viewing angle is FOVS, and it satisfies the following condition: FOVS = 17.2 degrees.

[0238] The aperture value of the imaging optical lens in the first state is FnoL, and the aperture value of the imaging optical lens in the second state is FnoS, and it satisfies the following condition: FnoL / FnoS = 0.88.

[0239] When the imaging optical lens is in the first state, the distance on the optical axis from the object-side surface of the lens closest to the object side to the imaging surface IMG is TLL. When the imaging optical lens is in the second state, the distance on the optical axis from the object-side surface of the lens closest to the object side to the imaging surface IMG is TLS, and it satisfies the following condition: TLS / TLL = 1.09. In this embodiment, TLL is the distance on the optical axis from the object-side surface of the first lens E1 to the imaging surface IMG when the imaging optical lens is in the first state, and TLS is the distance on the optical axis from the object-side surface of the first lens E1 to the imaging surface IMG when the imaging optical lens is in the second state.

[0240] When the imaging optical lens is in the first state, the distance from the image-side surface of the lens closest to the image side to the imaging surface IMG on the optical axis is BLL. When the imaging optical lens is in the second state, the distance from the image-side surface of the lens closest to the image side to the imaging surface IMG on the optical axis is BLS, and the following condition is satisfied: BLS / BLL = 1.00. In this embodiment, BLL is the distance from the image-side surface of the fifth lens E5 to the imaging surface IMG on the optical axis when the imaging optical lens is in the first state, and BLS is the distance from the image-side surface of the fifth lens E5 to the imaging surface IMG on the optical axis when the imaging optical lens is in the second state.

[0241] When the imaging optical lens is in the first state, the distance from the object-side surface of the lens closest to the object side to the image-side surface of the lens closest to the image side on the optical axis is TDL. When the imaging optical lens is in the second state, the distance from the object-side surface of the lens closest to the object side to the image-side surface of the lens closest to the image side on the optical axis is TDS, and the following condition is satisfied: 10×|TDS - TDL| / TDL = 3.29. In this embodiment, TDL is the distance from the object-side surface of the first lens E1 to the image-side surface of the fifth lens E5 on the optical axis when the imaging optical lens is in the first state, and TDS is the distance from the object-side surface of the first lens E1 to the image-side surface of the fifth lens E5 on the optical axis when the imaging optical lens is in the second state.

[0242] When the imaging optical lens is in the first state, the distance from the object-side surface of the lens closest to the object side to the imaging surface IMG on the optical axis is TLL, and the maximum imaging height of the imaging optical lens is ImgH, and the following condition is satisfied: TLL / ImgH = 6.83.

[0243] When the imaging optical lens is in the first state, the distance from the image-side surface of the lens closest to the image side to the imaging surface IMG on the optical axis is BLL, and the maximum imaging height of the imaging optical lens is ImgH, and the following condition is satisfied: BLL / ImgH = 5.06.

[0244] When the imaging optical lens is in the first state, the distance from the object-side surface of the lens closest to the object side to the image-side surface of the lens closest to the image side on the optical axis is TDL. When the imaging optical lens is in the first state, the distance from the image-side surface of the lens closest to the image side to the imaging surface IMG on the optical axis is BLL, and the following condition is satisfied: TDL / BLL = 0.35.

[0245] When the imaging optical lens is in the first state, the focal length is fL, and the focal length of the first lens E1 is f1, and the following condition is satisfied: fL / f1 = 1.84.

[0246] When the imaging optical lens is in the first state, the focal length is fL, and the focal length of the third lens E3 is f3, and the following condition is satisfied: |fL / f3| = 0.31.

[0247] When the imaging optical lens is in the first state, the focal length is fL, and the combined focal length of the first lens E1 and the second lens E2 is f12, which satisfies the following condition: fL / f12 = 1.10.

[0248] The focal length of the first lens E1 is f1, and the focal length of the second lens E2 is f2, which satisfies the following condition: |f1 / f2| = 0.51.

[0249] The focal length of the third lens E3 is f3, and the focal length of the fourth lens E4 is f4, which satisfies the following condition: f4 / f3 = -0.42.

[0250] When the imaging optical lens is in the first state, the focal length is fL, the radius of curvature of the object-side surface of the fourth lens E4 is R7, and the radius of curvature of the image-side surface of the fourth lens E4 is R8, which satisfies the following condition: fL / R7 + fL / R8 = 14.04.

[0251] The radius of curvature of the image-side surface of the first lens E1 is R2, and the radius of curvature of the object-side surface of the fourth lens E4 is R7, which satisfies the following condition: (R2 + R7) / (R2 - R7) = 1.09.

[0252] The radius of curvature of the object-side surface of the second lens E2 is R3, and the radius of curvature of the image-side surface of the third lens E3 is R6, which satisfies the following condition: (R3 - R6) / (R3 + R6) = 0.36.

[0253] The thickness of the first lens E1 on the optical axis is CT1, and the thickness of the second lens E2 on the optical axis is CT2, which satisfies the following condition: CT1 / CT2 = 2.82.

[0254] The thickness of the first lens E1 on the optical axis is CT1, and the distance on the optical axis from the object-side surface of the third lens E3 to the image-side surface of the fourth lens E4 when the imaging optical lens is in the first state is Dr5r8L, which satisfies the following condition: CT1 / Dr5r8L = 1.66.

[0255] When the imaging optical lens is in the first state, the spacing distance on the optical axis between the third lens E3 and the fourth lens E4 is T34L, and the thickness of the fourth lens E4 on the optical axis is CT4, which satisfies the following condition: 10×T34L / CT4 = 0.97. In this embodiment, the spacing distance on the optical axis between two adjacent lenses refers to the spacing distance on the optical axis between two adjacent mirror surfaces of the two adjacent lenses.

[0256] When the imaging optical lens is in the first state, the axial distance between the third lens E3 and the fourth lens E4 is T34L, and the axial distance between the fourth lens E4 and the fifth lens E5 is T45L, which satisfy the following condition: 10×T34L / T45L = 0.46.

[0257] When the imaging optical lens is in the first state, the axial distance between the fourth lens E4 and the fifth lens E5 is T45L, and the thickness of the fourth lens E4 on the optical axis is CT4, which satisfy the following condition: T45L / CT4 = 2.10.

[0258] When the imaging optical lens is in the first state, the axial distance between the fourth lens E4 and the fifth lens E5 is T45L, and the thickness of the fifth lens E5 on the optical axis is CT5, which satisfy the following condition: T45L / CT5 = 2.98.

[0259] The Abbe number of the second lens E2 is V2, the Abbe number of the fourth lens E4 is V4, and the Abbe number of the fifth lens E5 is V5, which satisfy the following condition: V2 + V4 + V5 = 72.1.

[0260] When the imaging optical lens is in the first state, the displacement of the intersection point of the object-side surface of the third lens E3 on the optical axis to the position of the maximum effective radius of the object-side surface of the third lens E3 parallel to the optical axis is Sag3R1L, and the thickness of the third lens E3 on the optical axis is CT3, which satisfy the following condition: Sag3R1L / CT3 = 1.08. In this embodiment, the direction of Sag3R1L points to the image side, so the value is positive.

[0261] When the imaging optical lens is in the first state, the maximum effective radius of the object-side surface of the first lens E1 is Y1R1L, and the maximum effective radius of the image-side surface of the fifth lens E5 is Y5R2L, which satisfy the following condition: Y1R1L / Y5R2L = 1.56.

[0262] When the imaging optical lens is in the first state, the distance between the second lens E2 and the third lens E3 on the optical axis is T23L. When the imaging optical lens is in the first state, the displacement of the intersection point of the image-side surface of the second lens E2 on the optical axis to the position of the maximum effective radius of the image-side surface of the second lens E2 parallel to the optical axis is Sag2R2L. When the imaging optical lens is in the first state, the displacement of the intersection point of the object-side surface of the third lens E3 on the optical axis to the position of the maximum effective radius of the object-side surface of the third lens E3 parallel to the optical axis is Sag3R1L. When the imaging optical lens is in the first state, the maximum effective radius of the image-side surface of the second lens E2 is Y2R2L, and it satisfies the following condition: (T23L + Sag3R1L - Sag2R2L) / Y2R2L = 0.17. In this embodiment, the direction of Sag3R1L points to the image side, so the value is positive; the direction of Sag2R2L points to the image side, so the value is positive.

[0263] Please refer to Tables 1A to 1C below for reference.

[0264]

[0265] Table 1A is Figure 1 The detailed structural data of the first embodiment, where the units of the radius of curvature, thickness, and focal length are millimeters (mm), and the surfaces from 0 to 17 represent the surfaces from the object side to the image side in sequence.

[0266]

[0267]

[0268] Table 1B contains the parameters of the first state and the second state of the imaging optical lens under different focusing conditions. It should be understood that only two moving focusing states, such as the first state and the second state, are disclosed in this embodiment, but the present disclosure is not limited to the disclosed states, and the imaging optical lens of this embodiment may have other moving focusing states with different focal lengths between the first state and the second state to correspond to the focusing states of other different object distances.

[0269] As can be seen from Table 1B, the imaging optical lens performs a moving focusing process according to the change of the object distance, and the moving lens group Gm moves toward the object side along the optical axis direction relative to the last lens group Gn during the moving focusing process when the imaging optical lens changes from the first state to the second state. Specifically, when the object distance changes from infinity to 149.556 mm, the imaging optical lens changes from the first state to the second state, and the distance D1 between the moving lens group Gm and the last lens group Gn on the optical axis increases from 0.364 mm in the first state to 2.023 mm in the second state, while the reflecting element E6 has no relative movement relative to the last lens group Gn during the moving focusing process. That is, when the object distance gradually shortens, the moving lens group Gm moves toward the object side along the optical axis direction relative to the last lens group Gn during the moving focusing process.

[0270]

[0271]

[0272] Table 1C shows the aspherical data in the first embodiment, where k is the conic coefficient in the aspherical curve equation, and A4 to A24 represent the 4th to 24th order aspherical coefficients of each surface. In addition, the following tables of each embodiment correspond to the schematic diagrams and aberration curves of each embodiment, and the definitions of the data in the tables are the same as those in Tables 1A to 1C of the first embodiment, and will not be elaborated here.

[0273] <Second Embodiment>

[0274] Please refer to Figures 4 to 6 where Figure 4 shows schematic diagrams of the imaging device according to the second embodiment of the present disclosure in the first state and in the second state respectively, Figure 5 from left to right are the spherical aberration, astigmatism, and distortion curves of the imaging device of the second embodiment in the first state, and Figure 6 from left to right are the spherical aberration, astigmatism, and distortion curves of the imaging device of the second embodiment in the second state. Among them, Figure 4 the upper half of Figure 4 is a schematic diagram of the imaging optical lens in the first state, while Figure 4It can be known that the imaging device 2 includes an imaging optical lens (not otherwise labeled) and an electronic photosensitive element IS. The imaging optical lens sequentially includes a diaphragm S1, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a diaphragm S2, a reflection element E6, a filter element E7, and an imaging surface IMG along the optical path from the object side to the image side. Further, the imaging optical lens sequentially includes a moving lens group Gm and a last lens group Gn along the optical path traveling direction from the object side to the image side, where the moving lens group Gm includes the first lens E1 and the second lens E2, and the last lens group Gn includes the third lens E3, the fourth lens E4, and the fifth lens E5. Among them, the electronic photosensitive element IS is disposed on the imaging surface IMG. The imaging optical lens includes five lenses (E1, E2, E3, E4, E5), and there are no other interpolated lenses between the lenses. In addition, there are no other interpolated lenses on the optical axis between the last lens group Gn and the reflection element E6.

[0275] During the moving focusing process, the imaging optical lens adjusts the focal length of the imaging optical lens by changing the distance between the two lens groups (Gm, Gn). From Figure 4 It can be known that the moving lens group Gm moves along the optical axis direction relative to the last lens group Gn during the moving focusing process. And, the imaging optical lens can be in the first state shown in Figure 4 the upper half or Figure 4 the second state shown in the lower half through the moving focusing process. The imaging optical lens being in the first state means the state of the imaging optical lens when the object is at an infinite object distance and the entrance pupil diameter of the imaging optical lens is the largest; the imaging optical lens being in the second state means the state of the imaging optical lens when the object is at a finite object distance. Among them, the moving lens group Gm moves toward the object side along the optical axis direction relative to the last lens group Gn during the moving focusing process when the imaging optical lens changes from the first state to the second state. It should be noted that the lenses in the moving lens group Gm have no relative movement with each other during the moving focusing process, and the lenses in the last lens group Gn have no relative movement with each other during the moving focusing process. In addition, during the moving focusing process, the reflection element E6 has no relative movement relative to the last lens group Gn.

[0276] The first lens E1 has a positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, its image-side surface is convex near the optical axis, and both of its surfaces are aspherical surfaces.

[0277] The second lens E2 has a negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, its image-side surface is concave near the optical axis, both of its surfaces are aspherical surfaces, its object-side surface has an inflection point, and its object-side surface has a convex critical point at the off-axis position.

[0278] The third lens E3 has a negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, its image-side surface is concave near the optical axis, both of its surfaces are aspherical, and its image-side surface has two inflection points.

[0279] The fourth lens E4 has a positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, its image-side surface is concave near the optical axis, both of its surfaces are aspherical, and its object-side surface has two inflection points.

[0280] The fifth lens E5 has a negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, its image-side surface is convex near the optical axis, both of its surfaces are aspherical, its object-side surface has one inflection point, its image-side surface has one inflection point, and its object-side surface has a convex critical point off the axis.

[0281] The reflecting element E6 is made of glass. It is arranged between the fifth lens E5 and the imaging surface IMG along the optical axis direction and does not affect the focal length of the imaging optical lens. The reflecting element E6 is a prism and has a function of deflecting the optical path. For the convenience of description, Figure 4 the deflection effect of the reflecting element E6 on the optical path is omitted from the drawing. However, the reflecting element E6 can have various different forms according to actual design requirements, so as to cause different deflection effects on the optical path. Among them, the reflecting element E6 of the present embodiment can, for example, have a structure similar to Figure 57 to Figure 63 that, and reference can be made to the foregoing corresponding Figure 57 to Figure 63 description, and details will not be repeated here. Further, the reflecting element E6 of the present embodiment can also, for example, have a structure similar to Fig.54 that, and can deflect the optical path five times. Reference can be made to the foregoing corresponding Fig.54 description, and details will not be repeated here.

[0282] The filter element E7 is made of glass. It is arranged between the reflecting element E6 and the imaging surface IMG and does not affect the focal length of the imaging optical lens.

[0283] Please refer to Tables 2A to 2D below for reference.

[0284]

[0285]

[0286]

[0287] The definitions described in Table 2B are the same as those in the first embodiment. It should be understood that only two moving focus states, such as the first state and the second state, are disclosed in this embodiment. However, the present disclosure is not limited to the disclosed states, and the imaging optical lens of this embodiment may have other moving focus states with different focal lengths between the first state and the second state to correspond to the focus states of other different object distances.

[0288] As can be seen from Table 2B, the imaging optical lens performs a moving focus process according to the change of the object distance, and the moving lens group Gm moves toward the object side along the optical axis direction relative to the last lens group Gn during the moving focus process when the imaging optical lens changes from the first state to the second state. Specifically, when the object distance changes from infinity to 149.565 mm, the imaging optical lens changes from the first state to the second state, and the distance D1 between the moving lens group Gm and the last lens group Gn on the optical axis increases from 0.257 mm in the first state to 1.937 mm in the second state, while the reflection element E6 has no relative movement relative to the last lens group Gn during the moving focus process. That is, when the object distance gradually decreases, the moving lens group Gm moves toward the object side along the optical axis direction relative to the last lens group Gn during the moving focus process.

[0289]

[0290]

[0291] In the second embodiment, the aspheric curve equation is expressed in the same form as in the first embodiment. In addition, the definitions described in Table 2D below are the same as those in the first embodiment and will not be elaborated here.

[0292]

[0293] <Third Embodiment>

[0294] Please refer to Figures 7 to 9 , where Figure 7 are schematic diagrams of the imaging device according to the third embodiment of the present disclosure in the first state and in the second state respectively. Figure 8 From left to right are the spherical aberration, astigmatism, and distortion curve graphs of the imaging device according to the third embodiment in the first state, and Fig. 9 from left to right are the spherical aberration, astigmatism, and distortion curve graphs of the imaging device according to the third embodiment in the second state. Among them, Figure 7 the upper half is a schematic diagram of the imaging optical lens in the first state, while Figure 7 the lower half is a schematic diagram of the imaging optical lens in the second state. From Figure 7It can be seen that the imaging device 3 includes an optical lens for imaging (not separately labeled) and an electronic photosensitive element IS. The optical lens for imaging includes an aperture S1, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, an aperture S2, a reflective element E6, a filter element E7 and an imaging surface IMG in order from the object side to the image side along the optical path. Further, the optical lens for imaging includes a moving lens group Gm and a final lens group Gn in order from the object side to the image side along the direction of the optical path, wherein the moving lens group Gm includes a first lens E1 and a second lens E2, and the final lens group Gn includes a third lens E3, a fourth lens E4 and a fifth lens E5. The electronic photosensitive element IS is disposed on the imaging surface IMG. The optical lens for imaging includes five lenses (E1, E2, E3, E4, E5), and there are no other lenses interpolated between the lenses. In addition, there are no other lenses interpolated between the final lens group Gn and the reflective element E6 on the optical axis.

[0295] During the moving focusing process, the distance between the two lens groups (Gm, Gn) is changed to adjust the focal length of the imaging optical lens. Figure 7 It can be seen that the moving lens group Gm moves along the optical axis relative to the final lens group Gn during the moving focusing process. Figure 7 The first state shown in the upper part or Figure 7 The second state is shown in the lower part. The imaging optical lens being in the first state refers to the state of the imaging optical lens when the object is at an infinite object distance and the entrance pupil diameter of the imaging optical lens is at its maximum; the imaging optical lens being in the second state refers to the state of the imaging optical lens when the object is at a finite object distance. Among them, the mobile lens group Gm moves toward the object side along the optical axis relative to the last lens group Gn during the mobile focusing process when the imaging optical lens is transformed from the first state to the second state. It should be noted that the lenses in the mobile lens group Gm do not move relative to each other during the mobile focusing process, and the lenses in the last lens group Gn do not move relative to each other during the mobile focusing process. In addition, during the mobile focusing process, the reflective element E6 does not move relative to the last lens group Gn.

[0296] The first lens E1 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical, and its image-side surface has an inflection point.

[0297] The second lens E2 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical.

[0298] The third lens E3 has a positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has two inflection points, and its image-side surface has one inflection point.

[0299] The fourth lens E4 has a 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, and its object-side surface has one inflection point.

[0300] The fifth lens E5 has a positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has one inflection point, its image-side surface has one inflection point, and its image-side surface has a convex critical point off the axis.

[0301] The reflecting element E6 is made of glass. It is disposed between the fifth lens E5 and the imaging surface IMG along the optical axis direction and does not affect the focal length of the imaging optical lens. The reflecting element E6 is a prism and has a function of turning the optical path. For the sake of convenience of description, Figure 7 the deflection effect of the reflecting element E6 on the optical path is omitted from the drawing. However, the reflecting element E6 can have various different forms according to actual design requirements, so as to cause different deflection effects on the optical path. Among them, the reflecting element E6 of this embodiment can, for example, have a structure similar to Figures 57 to 63 and reference can be made to the foregoing corresponding Figure 57 to Figure 63 description, which will not be elaborated here. Further, the reflecting element E6 of this embodiment can also, for example, have a structure similar to Fig.54 and can turn the optical path five times. Reference can be made to the foregoing corresponding Fig.54 description, which will not be elaborated here.

[0302] The filter element E7 is made of glass. It is disposed between the reflecting element E6 and the imaging surface IMG and does not affect the focal length of the imaging optical lens.

[0303] Please refer to the following Tables 3A to 3D for reference.

[0304]

[0305]

[0306]

[0307] The definitions described in Table 3B are the same as those in the first embodiment. It should be understood that only two moving focusing states, such as the first state and the second state, are disclosed in this embodiment. However, the present disclosure is not limited to the disclosed states, and the imaging optical lens of this embodiment may have other moving focusing states with different focal lengths between the first state and the second state to correspond to the focusing states of other different object distances.

[0308] As can be seen from Table 3B, the imaging optical lens performs a moving focusing process according to the change of the object distance, and the moving lens group Gm moves toward the object side along the optical axis direction relative to the last lens group Gn during the moving focusing process when the imaging optical lens changes from the first state to the second state. Specifically, when the object distance changes from infinity to 149.511 mm, the imaging optical lens changes from the first state to the second state, and the distance D1 between the moving lens group Gm and the last lens group Gn on the optical axis increases from 0.458 mm in the first state to 1.708 mm in the second state, while the reflecting element E6 has no relative movement relative to the last lens group Gn during the moving focusing process. That is, when the object distance gradually shortens, the moving lens group Gm moves toward the object side along the optical axis direction relative to the last lens group Gn during the moving focusing process.

[0309]

[0310]

[0311] In the third embodiment, the curve equation of the aspherical surface is expressed in the same form as that in the first embodiment. In addition, the definitions described in Table 3D below are the same as those in the first embodiment and will not be elaborated here.

[0312]

[0313] <Fourth Embodiment>

[0314] Please refer to Figures 10 to 12 , where Fig.10 are schematic diagrams of the imaging device according to the fourth embodiment of the present disclosure in the first state and in the second state respectively. Fig.11 From left to right are the spherical aberration, astigmatism, and distortion curve graphs of the imaging device according to the fourth embodiment in the first state, and Fig.12 from left to right are the spherical aberration, astigmatism, and distortion curve graphs of the imaging device according to the fourth embodiment in the second state. Among them, Fig.10 the upper half is a schematic diagram of the imaging optical lens in the first state, while Fig.10 the lower half is a schematic diagram of the imaging optical lens in the second state. From Fig.10It can be seen that the imaging device 4 includes an optical lens for imaging (not labeled) and an electronic photosensitive element IS. The optical lens for imaging includes an aperture S1, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, an aperture S2, a reflective element E6, a filter element E7 and an imaging surface IMG in order from the object side to the image side along the optical path. Further, the optical lens for imaging includes a moving lens group Gm and a final lens group Gn in order from the object side to the image side along the optical path, wherein the moving lens group Gm includes a first lens E1 and a second lens E2, and the final lens group Gn includes a third lens E3, a fourth lens E4 and a fifth lens E5. The electronic photosensitive element IS is disposed on the imaging surface IMG. The optical lens for imaging includes five lenses (E1, E2, E3, E4, E5), and there are no other interpolated lenses between the lenses. In addition, there are no other interpolated lenses on the optical axis between the final lens group Gn and the reflective element E6.

[0315] During the moving focusing process, the distance between the two lens groups (Gm, Gn) is changed to adjust the focal length of the imaging optical lens. Fig.10 It can be seen that the moving lens group Gm moves along the optical axis relative to the final lens group Gn during the moving focusing process. Fig.10 The first state shown in the upper part or Fig.10 The second state is shown in the lower part. The imaging optical lens being in the first state refers to the state of the imaging optical lens when the object is at an infinite object distance and the entrance pupil diameter of the imaging optical lens is at its maximum; the imaging optical lens being in the second state refers to the state of the imaging optical lens when the object is at a finite object distance. Among them, the mobile lens group Gm moves toward the object side along the optical axis relative to the last lens group Gn during the mobile focusing process when the imaging optical lens is transformed from the first state to the second state. It should be noted that the lenses in the mobile lens group Gm do not move relative to each other during the mobile focusing process, and the lenses in the last lens group Gn do not move relative to each other during the mobile focusing process. In addition, during the mobile focusing process, the reflective element E6 does not move relative to the last lens group Gn.

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

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

[0318] The third lens E3 has a positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has an inflection point, and its image-side surface has an inflection point.

[0319] The fourth lens E4 has a 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, and its object-side surface has an inflection point.

[0320] The fifth lens E5 has a 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 two inflection points.

[0321] The reflecting element E6 is made of glass. It is arranged between the fifth lens E5 and the imaging surface IMG along the optical axis direction and does not affect the focal length of the imaging optical lens. The reflecting element E6 is a prism and has a function of turning the optical path. For the sake of convenience of description, Fig.10 the deflection effect of the reflecting element E6 on the optical path is omitted from the drawing. However, the reflecting element E6 can have various different forms according to actual design requirements, so as to cause different deflection effects on the optical path. Among them, the reflecting element E6 of this embodiment can, for example, have a structure similar to Figure 57 to Figure 63 and reference can be made to the corresponding Figure 57 to Figure 63 description above and will not be elaborated here. Further, the reflecting element E6 of this embodiment can also, for example, have a structure similar to Fig.54 and can turn the optical path five times. Reference can be made to the corresponding Fig.54 description above and will not be elaborated here.

[0322] The filter element E7 is made of glass. It is arranged between the reflecting element E6 and the imaging surface IMG and does not affect the focal length of the imaging optical lens.

[0323] Please refer to the following Tables 4A to 4D for reference.

[0324]

[0325]

[0326]

[0327] The definitions described in Table 4B are the same as those in the first embodiment. It should be understood that only two moving focusing states, such as the first state and the second state, are disclosed in this embodiment. However, the disclosure is not limited to the disclosed states, and the imaging optical lens of this embodiment may have other moving focusing states with different focal lengths between the first state and the second state to correspond to the focusing states of other different object distances.

[0328] As can be seen from Table 4B, the imaging optical lens performs a moving focusing process according to the change of the object distance, and the moving lens group Gm moves toward the object side along the optical axis direction relative to the last lens group Gn during the moving focusing process when the imaging optical lens changes from the first state to the second state. Specifically, when the object distance changes from infinity to 150.030 mm, the imaging optical lens changes from the first state to the second state, and the distance D1 between the moving lens group Gm and the last lens group Gn on the optical axis increases from 0.481 mm in the first state to 1.991 mm in the second state, while the reflecting element E6 has no relative movement relative to the last lens group Gn during the moving focusing process. That is, when the object distance gradually decreases, the moving lens group Gm moves toward the object side along the optical axis direction relative to the last lens group Gn during the moving focusing process.

[0329]

[0330]

[0331] In the fourth embodiment, the curve equation of the aspherical surface is expressed in the same form as in the first embodiment. In addition, the definitions described in Table 4D below are the same as those in the first embodiment and will not be elaborated here.

[0332]

[0333] <Fifth Embodiment>

[0334] Please refer to Figures 13 to 15 , where Fig.13 are schematic diagrams of the imaging device according to the fifth embodiment of the present disclosure in the first state and in the second state respectively. Fig.14 From left to right are the spherical aberration, astigmatism, and distortion curve graphs of the imaging device of the fifth embodiment in the first state, and Fig.15 from left to right are the spherical aberration, astigmatism, and distortion curve graphs of the imaging device of the fifth embodiment in the second state. Among them, Fig.13 the upper half is a schematic diagram of the imaging optical lens in the first state, while Fig.13 the lower half is a schematic diagram of the imaging optical lens in the second state. From Fig.13It can be seen that the imaging device 5 includes an imaging optical lens (not labeled) and an electronic photosensitive element IS. The imaging optical lens includes an aperture S1, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, an aperture S2, a reflective element E6, a filter element E7 and an imaging surface IMG in order from the object side to the image side along the optical path. Further, the imaging optical lens includes a moving lens group Gm and a final lens group Gn in order from the object side to the image side along the optical path, wherein the moving lens group Gm includes a first lens E1 and a second lens E2, and the final lens group Gn includes a third lens E3, a fourth lens E4 and a fifth lens E5. The electronic photosensitive element IS is disposed on the imaging surface IMG. The imaging optical lens includes five lenses (E1, E2, E3, E4, E5), and there are no other interpolated lenses between the lenses. In addition, there are no other interpolated lenses on the optical axis between the final lens group Gn and the reflective element E6.

[0335] During the moving focusing process, the distance between the two lens groups (Gm, Gn) is changed to adjust the focal length of the imaging optical lens. Fig.13 It can be seen that the moving lens group Gm moves along the optical axis relative to the final lens group Gn during the moving focusing process. Fig.13 The first state shown in the upper part or Fig.13 The second state is shown in the lower part. The imaging optical lens being in the first state refers to the state of the imaging optical lens when the object is at an infinite object distance and the entrance pupil diameter of the imaging optical lens is at its maximum; the imaging optical lens being in the second state refers to the state of the imaging optical lens when the object is at a finite object distance. Among them, the mobile lens group Gm moves toward the object side along the optical axis relative to the last lens group Gn during the mobile focusing process when the imaging optical lens is transformed from the first state to the second state. It should be noted that the lenses in the mobile lens group Gm do not move relative to each other during the mobile focusing process, and the lenses in the last lens group Gn do not move relative to each other during the mobile focusing process. In addition, during the mobile focusing process, the reflective element E6 does not move relative to the last lens group Gn.

[0336] The first lens E1 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, its image-side surface is concave near the optical axis, both surfaces are aspherical, its image-side surface has four inflection points, and its image-side surface has a convex critical point and a concave critical point at an off-axis position.

[0337] The second lens E2 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical, and its object-side surface has two inflection points.

[0338] The third lens E3 has a positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has an inflection point, and its image-side surface has an inflection point.

[0339] The fourth lens E4 has a negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has an inflection point, and its image-side surface has two inflection points.

[0340] The fifth lens E5 has a negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical. Its object-side surface has an inflection point, its image-side surface has an inflection point, and its image-side surface has a concave critical point off the axis.

[0341] The reflecting element E6 is made of plastic. It is disposed between the fifth lens E5 and the imaging surface IMG along the optical axis direction and does not affect the focal length of the imaging optical lens. The reflecting element E6 is a prism and has a function of turning the optical path. For the sake of convenience of description, Fig.13 the deflection effect of the reflecting element E6 on the optical path is omitted from the drawing. However, the reflecting element E6 can have various different forms according to actual design requirements, so as to cause different deflection effects on the optical path. Among them, the reflecting element E6 of this embodiment can, for example, have a structure similar to Figures 57 to 63 and reference can be made to the foregoing corresponding Figures 57 to 63 description, which will not be elaborated here. Further, the reflecting element E6 of this embodiment can also, for example, have a structure similar to Fig.54 and can turn the optical path five times. Reference can be made to the foregoing corresponding Fig.54 description, which will not be elaborated here.

[0342] The filter element E7 is made of glass. It is disposed between the reflecting element E6 and the imaging surface IMG and does not affect the focal length of the imaging optical lens.

[0343] Please refer to the following Tables 5A to 5D for reference.

[0344]

[0345]

[0346]

[0347] The definitions described in Table 5B are the same as those in the first embodiment. It should be understood that only two moving focus states, such as the first state and the second state, are disclosed in this embodiment. However, the present disclosure is not limited to the disclosed states, and the imaging optical lens of this embodiment may have other moving focus states with different focal lengths between the first state and the second state to correspond to the focus states of other different object distances.

[0348] As can be seen from Table 5B, the imaging optical lens performs a moving focus process according to the change of the object distance, and the moving lens group Gm moves toward the object side along the optical axis direction relative to the last lens group Gn during the moving focus process when the imaging optical lens changes from the first state to the second state. Specifically, when the object distance changes from infinity to 150.100 mm, the imaging optical lens changes from the first state to the second state, and the distance D1 between the moving lens group Gm and the last lens group Gn on the optical axis increases from 0.120 mm in the first state to 1.820 mm in the second state, while the reflecting element E6 has no relative movement relative to the last lens group Gn during the moving focus process. That is, when the object distance gradually shortens, the moving lens group Gm moves toward the object side along the optical axis direction relative to the last lens group Gn during the moving focus process.

[0349]

[0350]

[0351] In the fifth embodiment, the aspheric curve equation is expressed in the same form as in the first embodiment. In addition, the definitions described in Table 5D below are the same as those in the first embodiment and will not be elaborated here.

[0352]

[0353] <Sixth Embodiment>

[0354] Please refer to Figures 16 to 18 , where Fig.16 are schematic diagrams of the imaging device according to the sixth embodiment of the present disclosure in the first state and in the second state respectively. Fig.17 From left to right are the spherical aberration, astigmatism, and distortion curves of the imaging device of the sixth embodiment in the first state, and Fig.18 from left to right are the spherical aberration, astigmatism, and distortion curves of the imaging device of the sixth embodiment in the second state. Among them, Fig.16 the upper half is a schematic diagram of the imaging optical lens in the first state, while Fig.16 the lower half is a schematic diagram of the imaging optical lens in the second state. From Fig.16It can be seen that the imaging device 6 includes an imaging optical lens (not labeled) and an electronic photosensitive element IS. The imaging optical lens includes an aperture S1, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, an aperture S2, a reflective element E6, a filter element E7 and an imaging surface IMG in order from the object side to the image side along the optical path. Further, the imaging optical lens includes a moving lens group Gm and a final lens group Gn in order from the object side to the image side along the optical path, wherein the moving lens group Gm includes a first lens E1 and a second lens E2, and the final lens group Gn includes a third lens E3, a fourth lens E4 and a fifth lens E5. The electronic photosensitive element IS is disposed on the imaging surface IMG. The imaging optical lens includes five lenses (E1, E2, E3, E4, E5), and there are no other interpolated lenses between the lenses. In addition, there are no other interpolated lenses on the optical axis between the final lens group Gn and the reflective element E6.

[0355] During the moving focusing process, the distance between the two lens groups (Gm, Gn) is changed to adjust the focal length of the imaging optical lens. Fig.16 It can be seen that the moving lens group Gm moves along the optical axis relative to the final lens group Gn during the moving focusing process. Fig.16 The first state shown in the upper part or Fig.16 The second state is shown in the lower part. The imaging optical lens being in the first state refers to the state of the imaging optical lens when the object is at an infinite object distance and the entrance pupil diameter of the imaging optical lens is at its maximum; the imaging optical lens being in the second state refers to the state of the imaging optical lens when the object is at a finite object distance. Among them, the mobile lens group Gm moves toward the object side along the optical axis relative to the last lens group Gn during the mobile focusing process when the imaging optical lens is transformed from the first state to the second state. It should be noted that the lenses in the mobile lens group Gm do not move relative to each other during the mobile focusing process, and the lenses in the last lens group Gn do not move relative to each other during the mobile focusing process. In addition, during the mobile focusing process, the reflective element E6 does not move relative to the last lens group Gn.

[0356] The first lens E1 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are spherical.

[0357] The second lens E2 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical.

[0358] The third lens E3 has a positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has an inflection point, and its image-side surface has an inflection point.

[0359] The fourth lens E4 has a 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.

[0360] The fifth lens E5 has a 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.

[0361] The reflecting element E6 is made of glass. It is arranged between the fifth lens E5 and the imaging surface IMG along the optical axis direction and does not affect the focal length of the imaging optical lens. The reflecting element E6 is a prism and has the function of turning the optical path. For the sake of convenience of description, Fig.16 the deflection effect of the reflecting element E6 on the optical path is omitted from the drawing. However, the reflecting element E6 can have various different forms according to actual design requirements, so as to cause different deflection effects on the optical path. Among them, the reflecting element E6 of this embodiment can, for example, have a structure similar to Figure 57 to Figure 63 , and reference can be made to the foregoing corresponding Figure 57 to Figure 63 description, and details will not be repeated here. Further, the reflecting element E6 of this embodiment can also, for example, have a structure similar to Fig.54 , and can turn the optical path five times. Reference can be made to the foregoing corresponding Fig.54 description, and details will not be repeated here.

[0362] The filter element E7 is made of glass. It is arranged between the reflecting element E6 and the imaging surface IMG and does not affect the focal length of the imaging optical lens.

[0363] Please refer to Tables 6A to 6D below for reference.

[0364]

[0365]

[0366]

[0367] All the definitions described in Table 6B are the same as those in the first embodiment. It should be understood that only two moving focus states, such as the first state and the second state, are disclosed in this embodiment. However, the present disclosure is not limited to the disclosed states, and the imaging optical lens of this embodiment can also have other moving focus states with different focal lengths between the first state and the second state to correspond to other different object distance focus states.

[0368] As can be seen from Table 6B, the optical lens for imaging performs a moving focusing process according to the change of the object distance, and the moving lens group Gm moves toward the object side along the optical axis direction relative to the last lens group Gn during the moving focusing process when the optical lens for imaging changes from the first state to the second state. Specifically, when the object distance changes from infinity to 150.029 mm, the optical lens for imaging changes from the first state to the second state, the distance D1 between the moving lens group Gm and the last lens group Gn on the optical axis increases from 0.433 mm in the first state to 1.863 mm in the second state, and the reflecting element E6 has no relative movement relative to the last lens group Gn during the moving focusing process. That is, when the object distance gradually decreases, the moving lens group Gm moves toward the object side along the optical axis direction relative to the last lens group Gn during the moving focusing process.

[0369]

[0370]

[0371] In the sixth embodiment, the curve equation of the aspherical surface is expressed in the same form as in the first embodiment. In addition, the definitions described in Table 6D below are the same as those in the first embodiment and will not be elaborated here.

[0372]

[0373] <Seventh Embodiment>

[0374] Please refer to Figures 19 to 21 , where Fig.19 are schematic diagrams of the imaging device according to the seventh embodiment of the present disclosure in the first state and in the second state respectively. Fig. 20 From left to right are the spherical aberration, astigmatism, and distortion curves of the imaging device according to the seventh embodiment in the first state, and Fig.21 from left to right are the spherical aberration, astigmatism, and distortion curves of the imaging device according to the seventh embodiment in the second state. Among them, Fig.19 the upper half of is a schematic diagram of the optical lens for imaging in the first state, while Fig.19 the lower half of is a schematic diagram of the optical lens for imaging in the second state. From Fig.19It can be seen that the imaging device 7 includes an optical lens for imaging (not separately labeled) and an electronic photosensitive element IS. The optical lens for imaging includes an aperture S1, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, an aperture S2, a reflective element E6, a filter element E7 and an imaging surface IMG in order from the object side to the image side along the optical path. Further, the optical lens for imaging includes a moving lens group Gm and a final lens group Gn in order from the object side to the image side along the direction of the optical path, wherein the moving lens group Gm includes a first lens E1 and a second lens E2, and the final lens group Gn includes a third lens E3, a fourth lens E4 and a fifth lens E5. The electronic photosensitive element IS is disposed on the imaging surface IMG. The optical lens for imaging includes five lenses (E1, E2, E3, E4, E5), and there are no other interpolated lenses between the lenses. In addition, there are no other interpolated lenses on the optical axis between the final lens group Gn and the reflective element E6.

[0375] During the moving focusing process, the distance between the two lens groups (Gm, Gn) is changed to adjust the focal length of the imaging optical lens. Fig.19 It can be seen that the moving lens group Gm moves along the optical axis relative to the final lens group Gn during the moving focusing process. Fig.19 The first state shown in the upper part or Fig.19 The second state is shown in the lower part. The imaging optical lens being in the first state refers to the state of the imaging optical lens when the object is at an infinite object distance and the entrance pupil diameter of the imaging optical lens is at its maximum; the imaging optical lens being in the second state refers to the state of the imaging optical lens when the object is at a finite object distance. Among them, the mobile lens group Gm moves toward the object side along the optical axis relative to the last lens group Gn during the mobile focusing process when the imaging optical lens is transformed from the first state to the second state. It should be noted that the lenses in the mobile lens group Gm do not move relative to each other during the mobile focusing process, and the lenses in the last lens group Gn do not move relative to each other during the mobile focusing process. In addition, during the mobile focusing process, the reflective element E6 does not move relative to the last lens group Gn.

[0376] The first lens E1 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are spherical.

[0377] The second lens E2 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical.

[0378] The third lens E3 has a negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has two inflection points, and its image-side surface has one inflection point.

[0379] The fourth lens E4 has a positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has one inflection point, and its image-side surface has one inflection point.

[0380] The fifth lens E5 has a negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical. Its object-side surface has two inflection points, its image-side surface has two inflection points, and its image-side surface has a concave critical point at the off-axis position.

[0381] The reflecting element E6 is made of glass. It is disposed between the fifth lens E5 and the imaging surface IMG along the optical axis direction and does not affect the focal length of the imaging optical lens. The reflecting element E6 is a prism and has a function of deflecting the optical path. For the convenience of description, Fig.19 the deflection effect of the reflecting element E6 on the optical path is omitted from the drawing. However, the reflecting element E6 can have various different forms according to actual design requirements, so as to cause different deflection effects on the optical path. For example, please refer to Fig.64 , which is a schematic diagram showing the configuration relationship and the optical path turning of an imaging device with a reflecting element according to the seventh embodiment of the present disclosure. In Fig.64 , the reflecting element E6 sequentially has a first penetration surface LP1, a first reflecting surface RF1, a second reflecting surface RF2, a third reflecting surface RF3, a fourth reflecting surface RF4, a fifth reflecting surface RF5, and a second penetration surface LP2 along the direction of the optical path. The first reflecting surface RF1 deflects the optical path from the first optical axis OA1 to the second optical axis OA2, the second reflecting surface RF2 deflects the optical path from the second optical axis OA2 to the third optical axis OA3, the third reflecting surface RF3 deflects the optical path from the third optical axis OA3 to the fourth optical axis OA4, the fourth reflecting surface RF4 deflects the optical path from the fourth optical axis OA4 to the fifth optical axis OA5, the fifth reflecting surface RF5 deflects the optical path from the fifth optical axis OA5 to the sixth optical axis OA6, and the optical path reaches the imaging surface IMG along the sixth optical axis OA6. In Fig.64 , the reflecting element E6 deflects the optical path five times, and the angle between the vector of the optical axis (the first optical axis OA1) at the near object end and the vector of the optical axis (the sixth optical axis OA6) at the near image end can be 180 degrees. In addition, the reflecting element E6 of this embodiment can also have a structure similar to Figure 57 to Figure 63 , and reference can be made to the foregoing description corresponding to Figure 57 to Figure 63 , and details will not be repeated here.

[0382] The material of the filter element E7 is glass. It is disposed between the reflection element E6 and the imaging surface IMG and does not affect the focal length of the imaging optical lens.

[0383] Please refer to Tables 7A to 7D below.

[0384]

[0385]

[0386]

[0387] The definitions described in Table 7B are the same as those in the first embodiment. It should be understood that only two moving focusing states, such as the first state and the second state, are disclosed in this embodiment. However, the present disclosure is not limited to the disclosed states, and the imaging optical lens of this embodiment may have other moving focusing states with different focal lengths between the first state and the second state to correspond to the focusing states of other different object distances.

[0388] As can be seen from Table 7B, the imaging optical lens performs a moving focusing process according to the change of the object distance, and the moving lens group Gm moves toward the object side along the optical axis relative to the last lens group Gn during the moving focusing process when the imaging optical lens changes from the first state to the second state. Specifically, when the object distance changes from infinity to 149.628 mm, the imaging optical lens changes from the first state to the second state, and the distance D1 between the moving lens group Gm and the last lens group Gn on the optical axis increases from 0.860 mm in the first state to 2.411 mm in the second state, while the reflection element E6 has no relative movement relative to the last lens group Gn during the moving focusing process. That is, when the object distance gradually decreases, the moving lens group Gm moves toward the object side along the optical axis relative to the last lens group Gn during the moving focusing process.

[0389]

[0390] In the seventh embodiment, the aspherical curve equation is expressed in the same form as in the first embodiment. In addition, the definitions described in Table 7D below are the same as those in the first embodiment and will not be repeated here.

[0391]

[0392]

[0393] <Eighth Embodiment>

[0394] Please refer to Figure 22 to Figure 24 , where Fig. 22Schematic diagrams showing the imaging device according to the eighth embodiment of the present disclosure in the first state and in the second state, Fig.23 From left to right are the spherical aberration, astigmatism, and distortion curves of the imaging device of the eighth embodiment in the first state, and Fig.24 From left to right are the spherical aberration, astigmatism, and distortion curves of the imaging device of the eighth embodiment in the second state. Among them, Fig. 22 The upper half of is a schematic diagram of the imaging optical lens in the first state, and Fig. 22 The lower half of is a schematic diagram of the imaging optical lens in the second state. It can be seen from Fig. 22 that the imaging device 8 includes an imaging optical lens (not labeled separately) and an electronic photosensitive element IS. The imaging optical lens sequentially includes a diaphragm S1, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a diaphragm S2, a reflection element E6, a filter element E7, and an imaging surface IMG along the optical path from the object side to the image side. Further, the imaging optical lens sequentially includes a moving lens group Gm and a final lens group Gn along the optical path direction from the object side to the image side, where the moving lens group Gm includes the first lens E1 and the second lens E2, and the final lens group Gn includes the third lens E3, the fourth lens E4, and the fifth lens E5. Among them, the electronic photosensitive element IS is disposed on the imaging surface IMG. The imaging optical lens includes five lenses (E1, E2, E3, E4, E5), and there are no other interpolated lenses between the lenses. In addition, there are no other interpolated lenses on the optical axis between the final lens group Gn and the reflection element E6.

[0395] The imaging optical lens adjusts the focal length of the imaging optical lens by changing the distance between the two lens groups (Gm, Gn) during the moving focusing process. It can be seen from Fig. 22 that the moving lens group Gm moves along the optical axis relative to the final lens group Gn during the moving focusing process. And, the imaging optical lens can be in the first state as shown in the upper half of Fig. 22 or Fig. 22The second state shown in the lower part. The imaging optical lens being in the first state means the state of the imaging optical lens when the object is at an infinite object distance and the entrance pupil diameter of the imaging optical lens is at its maximum; the imaging optical lens being in the second state means the state of the imaging optical lens when the object is at a finite object distance. Among them, the moving lens group Gm moves toward the object side along the optical axis relative to the last lens group Gn during the moving focusing process when the imaging optical lens changes from the first state to the second state. It should be noted that the lenses in the moving lens group Gm have no relative movement with each other during the moving focusing process, and the lenses in the last lens group Gn have no relative movement with each other during the moving focusing process. In addition, during the moving focusing process, the reflecting element E6 has no relative movement with respect to the last lens group Gn.

[0396] The first lens E1 has a positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, its image-side surface is convex near the optical axis, and both of its surfaces are spherical.

[0397] The second lens E2 has a negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, its image-side surface is concave near the optical axis, and both of its surfaces are aspherical.

[0398] The third lens E3 has a positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, its image-side surface is concave near the optical axis, and both of its surfaces are aspherical. Its object-side surface has two inflection points, and its image-side surface has two inflection points.

[0399] The fourth lens E4 has a negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, its image-side surface is concave near the optical axis, and both of its surfaces are aspherical.

[0400] The fifth lens E5 has a negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, its image-side surface is convex near the optical axis, and both of its surfaces are aspherical. Its object-side surface has one inflection point, and its image-side surface has one inflection point.

[0401] The reflecting element E6 is made of glass. It is arranged along the optical axis between the fifth lens E5 and the imaging surface IMG and does not affect the focal length of the imaging optical lens. The reflecting element E6 is a prism and has a function of turning the optical path. For the sake of convenience of description, Fig. 22 the deflection effect of the reflecting element E6 on the optical path is omitted from the drawing. However, the reflecting element E6 can have various different forms according to actual design requirements, so as to cause different deflection effects on the optical path. Among them, the reflecting element E6 in this embodiment can, for example, have a structure similar to Figure 57 to Figure 64 , and reference can be made to the corresponding Figure 57 to Figure 64 description above, and details will not be repeated here.

[0402] The material of the filter element E7 is glass. It is disposed between the reflecting element E6 and the imaging surface IMG and does not affect the focal length of the imaging optical lens.

[0403] Please refer to Tables 8A to 8D below.

[0404]

[0405]

[0406] All the definitions described in Table 8B are the same as those in the first embodiment. It should be understood that only two moving focusing states, such as the first state and the second state, are disclosed in this embodiment. However, the present disclosure is not limited to the disclosed states, and the imaging optical lens in this embodiment may have other moving focusing states with different focal lengths between the first state and the second state to correspond to the focusing states of other different object distances.

[0407] As can be seen from Table 8B, the imaging optical lens performs a moving focusing process according to the change of the object distance, and the moving lens group Gm moves toward the object side along the optical axis direction relative to the last lens group Gn during the moving focusing process when the imaging optical lens changes from the first state to the second state. Specifically, when the object distance changes from infinity to 150.003 mm, the imaging optical lens changes from the first state to the second state, and the distance D1 between the moving lens group Gm and the last lens group Gn on the optical axis increases from 0.779 mm in the first state to 2.631 mm in the second state, while the reflecting element E6 has no relative movement relative to the last lens group Gn during the moving focusing process. That is, when the object distance gradually decreases, the moving lens group Gm moves toward the object side along the optical axis direction relative to the last lens group Gn during the moving focusing process.

[0408]

[0409]

[0410] In the eighth embodiment, the aspherical curve equation is expressed in the same form as in the first embodiment. In addition, all the definitions described in Table 8D below are the same as those in the first embodiment and will not be elaborated here.

[0411]

[0412] <Ninth Embodiment>

[0413] Please refer to Figure 25 to Figure 28 , where Fig.25 shows schematic diagrams of the imaging device according to the ninth embodiment of the present disclosure in the first state, in the second state, and in the third state, Fig.26From left to right are the spherical aberration, astigmatism, and distortion curves of the imaging device of the ninth embodiment in the first state, Fig. 27 From left to right are the spherical aberration, astigmatism, and distortion curves of the imaging device of the ninth embodiment in the second state, and Fig.28 From left to right are the spherical aberration, astigmatism, and distortion curves of the imaging device of the ninth embodiment in the third state. Among them, Fig.25 The upper part of is a schematic diagram of the imaging optical lens in the first state, Fig.25 The middle part of is a schematic diagram of the imaging optical lens in the second state, while Fig.25 The lower part of is a schematic diagram of the imaging optical lens in the third state. From Fig.25 It can be seen that the imaging device 9 includes an imaging optical lens (not otherwise labeled) and an electronic photosensitive element IS. The imaging optical lens sequentially includes a diaphragm S1, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a diaphragm S2, a reflecting element E6, a filtering element E7, and an imaging surface IMG along the optical path from the object side to the image side. Further, the imaging optical lens sequentially includes a moving lens group Gm and a last lens group Gn along the optical path traveling direction from the object side to the image side, where the moving lens group Gm includes the first lens E1 and the second lens E2, and the last lens group Gn includes the third lens E3, the fourth lens E4, and the fifth lens E5. Among them, the electronic photosensitive element IS is disposed on the imaging surface IMG. The imaging optical lens includes five lenses (E1, E2, E3, E4, E5), and there are no other interpolated lenses between the lenses. In addition, there are no other interpolated lenses on the optical axis between the last lens group Gn and the reflecting element E6.

[0414] The imaging optical lens adjusts the focal length of the imaging optical lens by changing the distance between the two lens groups (Gm, Gn) during the moving focusing process. From Fig.25 It can be seen that the moving lens group Gm moves along the optical axis direction relative to the last lens group Gn during the moving focusing process. And, the imaging optical lens can be in the first state shown in Fig.25 the upper part, Fig.25 the second state shown in the middle part, or Fig.25The third state shown in the lower part. The imaging optical lens being in the first state means the state of the imaging optical lens when the object is located at an infinite object distance and the entrance pupil diameter of the imaging optical lens is at its maximum; the imaging optical lens being in the second state means the state of the imaging optical lens when the object is located at a finite object distance; the imaging optical lens being in the third state means the state of the imaging optical lens when the object is located at an infinite object distance and the entrance pupil diameter of the imaging optical lens is at its minimum. Among them, the movable lens group Gm moves toward the object side along the optical axis relative to the last lens group Gn during the moving focusing process when the imaging optical lens changes from the first state to the second state. In addition, the position of the aperture S1 is closer to the image side along the optical axis and the entrance pupil diameter is relatively larger in the first state of the imaging optical lens compared to the third state of the imaging optical lens. It should be noted that the lenses in the movable lens group Gm have no relative movement with each other during the moving focusing process, and the lenses in the last lens group Gn have no relative movement with each other during the moving focusing process. In addition, during the moving focusing process, the reflecting element E6 has no relative movement with respect to the last lens group Gn.

[0415] The first lens E1 has a positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, its image-side surface is convex near the optical axis, and both of its surfaces are spherical surfaces.

[0416] The second lens E2 has a negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, its image-side surface is concave near the optical axis, and both of its surfaces are aspherical surfaces.

[0417] The third lens E3 has a positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, its image-side surface is concave near the optical axis, and both of its surfaces are aspherical surfaces, and its image-side surface has an inflection point.

[0418] The fourth lens E4 has a negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, its image-side surface is concave near the optical axis, and both of its surfaces are aspherical surfaces. Its object-side surface has three inflection points, and its image-side surface has two inflection points.

[0419] The fifth lens E5 has a negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, its image-side surface is convex near the optical axis, and both of its surfaces are aspherical surfaces. Its object-side surface has an inflection point, its image-side surface has two inflection points, its object-side surface has a convex critical point off the axis, and its image-side surface has a concave critical point off the axis.

[0420] The material of the reflection element E6 is glass. It is disposed along the optical axis between the fifth lens E5 and the imaging surface IMG, and does not affect the focal length of the imaging optical lens. The reflection element E6 is a prism and has the function of turning the optical path. For the sake of convenience of description, Fig.25 the deflection effect of the reflection element E6 on the optical path is omitted from the drawing. However, the reflection element E6 can have various different forms according to actual design requirements, so as to cause different deflection effects on the optical path. Among them, the reflection element E6 of this embodiment can, for example, have a structure similar to Figure 57 to Figure 64 and reference can be made to the corresponding Figure 57 to Figure 64 description above, and details will not be repeated here.

[0421] The material of the filter element E7 is glass. It is disposed between the reflection element E6 and the imaging surface IMG, and does not affect the focal length of the imaging optical lens.

[0422] Please refer to the following Tables 9A to 9D for reference.

[0423]

[0424]

[0425] In this embodiment, the focal length of the imaging optical lens in the third state is fV, the aperture value of the imaging optical lens in the third state is FnoV, half of the maximum viewing angle of the imaging optical lens in the third state is HFOVV, the distance between the object to be photographed and the object-side surface of the lens closest to the object side in the imaging optical lens on the optical axis is the object distance, the distance between the object to be photographed and the diaphragm S1 on the optical axis is D0, the displacement amount between the diaphragm S1 and the object-side surface of the lens closest to the object side in the imaging optical lens on the optical axis is D1, and the distance between the image-side surface of the moving lens group Gm and the object-side surface of the last lens group Gn on the optical axis is D2. In this embodiment, the object distance is the distance between the object to be photographed and the object-side surface of the first lens E1 on the optical axis, D1 is the displacement amount between the diaphragm S1 and the object-side surface of the first lens E1 on the optical axis, and D2 is the distance between the image-side surface of the second lens E2 and the object-side surface of the third lens E3 on the optical axis. When the imaging optical lens is in the first state, the second state, and the third state through the moving focusing process, the values of the object distance, D0, D1, and D2 will be different (please refer to Table 9B below). Except for the parameter definitions described above in this paragraph, the definitions of the remaining parameters in Table 9B are the same as those in the first embodiment. Among them, if the displacement amount D1 is in the image-side direction, its value is positive, and if it is in the object-side direction, its value is negative.

[0426]

[0427] It should be understood that only three moving focusing states, such as the first state, the second state, and the third state, are disclosed in this embodiment. However, the present disclosure is not limited to the disclosed states, and the imaging optical lens of this embodiment may have other moving focusing states with different focal lengths between any two of the first state, the second state, and the third state, so as to correspond to the focusing states of other different object distances.

[0428] As can be seen from Table 9B, the imaging optical lens performs a moving focusing process according to the change of the object distance, and the moving lens group Gm moves toward the object side along the optical axis direction relative to the last lens group Gn during the moving focusing process when the imaging optical lens changes from the first state (or the third state) to the second state. Specifically, when the object distance changes from infinity to 149.523 mm, the imaging optical lens changes from the first state (or the third state) to the second state, and the distance D2 between the moving lens group Gm and the last lens group Gn on the optical axis increases from 0.719 mm in the first state (or the third state) to 2.419 mm in the second state, while the reflecting element E6 has no relative movement relative to the last lens group Gn during the moving focusing process. That is, when the object distance gradually decreases, the moving lens group Gm moves toward the object side along the optical axis direction relative to the last lens group Gn during the moving focusing process.

[0429]

[0430]

[0431] In the ninth embodiment, the aspheric curve equation is expressed in the same form as in the first embodiment. In addition, except that the parameter FnoV is defined in this embodiment, the definitions described in Table 9D below are the same as those in the first embodiment and will not be repeated here.

[0432]

[0433] <Tenth Embodiment>

[0434] Please refer to Figure 29 to Figure 31 , where Fig.29 are schematic diagrams of the imaging device according to the tenth embodiment of the present disclosure in the first state and in the second state, respectively. Fig.30 From left to right are the spherical aberration, astigmatism, and distortion curves of the imaging device according to the tenth embodiment in the first state, and Fig.31 from left to right are the spherical aberration, astigmatism, and distortion curves of the imaging device according to the tenth embodiment in the second state. Among them, Fig.29 the upper half is a schematic diagram of the imaging optical lens in the first state, while Fig.29 the lower half is a schematic diagram of the imaging optical lens in the second state. From Fig.29It can be seen that the imaging device 10 includes an optical lens for imaging (not labeled) and an electronic photosensitive element IS. The optical lens for imaging includes an aperture S1, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, an aperture S2, a reflective element E6, a filter element E7 and an imaging surface IMG in order from the object side to the image side along the optical path. Further, the optical lens for imaging includes a moving lens group Gm and a final lens group Gn in order from the object side to the image side along the optical path, wherein the moving lens group Gm includes a first lens E1 and a second lens E2, and the final lens group Gn includes a third lens E3, a fourth lens E4 and a fifth lens E5. The electronic photosensitive element IS is disposed on the imaging surface IMG. The optical lens for imaging includes five lenses (E1, E2, E3, E4, E5), and there are no other lenses interpolated between the lenses. In addition, there are no other lenses interpolated between the final lens group Gn and the reflective element E6 on the optical axis.

[0435] During the process of moving and focusing, the imaging optical lens can adjust the focal length of the imaging optical lens by changing the distance between the two adjacent lens groups (Gm, Gn) and the reflective element E6. Fig.29 It can be seen that the moving lens group Gm moves along the optical axis relative to the final lens group Gn during the moving focus process, and the reflective element E6 moves along the optical axis relative to the final lens group Gn during the moving focus process. Fig.29 The first state shown in the upper part or Fig.29 The second state shown in the lower half. The imaging optical lens being in the first state refers to the state of the imaging optical lens when the object is at an infinite object distance and the entrance pupil diameter of the imaging optical lens is at its maximum; the imaging optical lens being in the second state refers to the state of the imaging optical lens when the object is at a finite object distance. Among them, the mobile lens group Gm moves toward the object side along the optical axis relative to the last lens group Gn during the mobile focusing process when the imaging optical lens is transformed from the first state to the second state. It should be noted that the lenses in the mobile lens group Gm do not move relative to each other during the mobile focusing process, and the lenses in the last lens group Gn do not move relative to each other during the mobile focusing process.

[0436] The first lens E1 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are spherical.

[0437] The second lens E2 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical.

[0438] The third lens E3 has a positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has an inflection point, and its image-side surface has an inflection point.

[0439] The fourth lens E4 has a 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, and its object-side surface has an inflection point.

[0440] The fifth lens E5 has a 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 two inflection points.

[0441] The reflecting element E6 is made of glass. It is disposed between the fifth lens E5 and the imaging surface IMG along the optical axis direction and does not affect the focal length of the imaging optical lens. The reflecting element E6 is a prism and has a function of turning the optical path. For the sake of convenience of description, Fig.29 the deflection effect of the reflecting element E6 on the optical path is omitted from the drawing. However, the reflecting element E6 can have a variety of different forms according to actual design requirements, so as to cause different deflection effects on the optical path. Among them, the reflecting element E6 of this embodiment can, for example, have a structure similar to Figure 57 to Figure 64 that, and reference can be made to the foregoing corresponding Figure 57 to Figure 64 description, and details will not be repeated here.

[0442] The filter element E7 is made of glass. It is disposed between the reflecting element E6 and the imaging surface IMG and does not affect the focal length of the imaging optical lens.

[0443] Please refer to the following Tables 10A to 10D for reference.

[0444]

[0445]

[0446] In this embodiment, the distance between the last lens group Gn and the reflecting element E6 on the optical axis is D2, and the distance between the reflecting element E6 and the filter element E7 on the optical axis is D3. When the imaging optical lens is in the first state and the second state through the moving focusing process, the values of D2 and D3 will also be different (please refer to Table 10B below).

[0447] Except for the parameter definitions described above in this paragraph, the definitions of the remaining parameters in Table 10B are the same as those in the first embodiment.

[0448]

[0449] It should be understood that only two moving focus states, such as the first state and the second state, are disclosed in this embodiment. However, the present disclosure is not limited to the disclosed states, and the imaging optical lens of this embodiment may have other moving focus states with different focal lengths between the first state and the second state to correspond to the focus states of other different object distances.

[0450] As can be seen from Table 10B, during the moving focus process of the imaging optical lens according to the change of the object distance, the moving lens group Gm moves toward the object side along the optical axis relative to the last lens group Gn during the moving focus process of the imaging optical lens changing from the first state to the second state, and the reflecting element E6 moves along the optical axis relative to the last lens group Gn during the moving focus process of the imaging optical lens changing from the first state to the second state. Specifically, when the object distance changes from infinity to 150.019 mm, the imaging optical lens changes from the first state to the second state. The distance D1 between the moving lens group Gm and the last lens group Gn on the optical axis increases from 0.471 mm in the first state to 1.378 mm in the second state. The distance D2 between the reflecting element E6 and the last lens group Gn on the optical axis increases from 0.730 mm in the first state to 1.066 mm in the second state, and the distance D3 between the reflecting element E6 and the filter element E7 on the optical axis increases from 0.510 mm in the first state to 0.846 mm in the second state. That is, when the object distance gradually decreases, the moving lens group Gm moves toward the object side along the optical axis relative to the last lens group Gn during the moving focus process, and the distances between the reflecting element E6 and the last lens group Gn and the filter element E7 in the optical axis direction both increase during the moving focus process. Please refer to Fig.66 , which is a schematic diagram showing the configuration relationship and the light path turning of the imaging device with a reflecting element in the first state and in the second state according to the tenth embodiment of the present disclosure. Among them, Fig.66 the upper half is a schematic diagram of the imaging optical lens in the first state, and Figure 66 the lower half is a schematic diagram of the imaging optical lens in the second state. As can be seen from Figure 66 , when the imaging optical lens changes from the first state to the second state during the moving focus process, the reflecting element E6 moves away from the last lens group Gn and the filter element E7 along the optical axis and moves a distance DT, where the value of DT is the difference between the distance D2 in the second state and the distance D2 in the first state, or the difference between the distance D3 in the second state and the distance D3 in the first state, that is, DT = 0.336 mm.

[0451]

[0452] In the tenth embodiment, the curve equation of the aspherical surface is expressed in the same form as that in the first embodiment. In addition, all the definitions described in Table 10D below are the same as those in the first embodiment, and thus will not be elaborated here.

[0453]

[0454] <Eleventh Embodiment>

[0455] Please refer to Figures 32 to 34 where Figure 32 FIG. shows schematic diagrams of the imaging device according to the eleventh embodiment of the present disclosure in the first state and in the second state, respectively. Figure 33 From left to right are the spherical aberration, astigmatism, and distortion curve graphs of the imaging device in the first state according to the eleventh embodiment, and Figure 34 from left to right are the spherical aberration, astigmatism, and distortion curve graphs of the imaging device in the second state according to the eleventh embodiment. Among them, Figure 32 the upper half of FIG. is a schematic diagram of the imaging optical lens in the first state, while Figure 32 the lower half of FIG. is a schematic diagram of the imaging optical lens in the second state. As can be seen from Figure 32 the imaging device 11 includes an imaging optical lens (not otherwise labeled) and an electronic photosensitive element IS. The imaging optical lens sequentially includes a diaphragm S1, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a diaphragm S2, a reflection element E6, a filter element E7, and an imaging surface IMG along the optical path from the object side to the image side. Further, the imaging optical lens sequentially includes a moving lens group Gm and a last lens group Gn along the optical path direction from the object side to the image side, where the moving lens group Gm includes the first lens E1, and the last lens group Gn includes the second lens E2, the third lens E3, and the fourth lens E4. Among them, the electronic photosensitive element IS is disposed on the imaging surface IMG. The imaging optical lens includes four lenses (E1, E2, E3, E4), and there are no other interpolated lenses between the lenses. In addition, there are no other interpolated lenses on the optical axis between the last lens group Gn and the reflection element E6.

[0456] During the moving focusing process, the imaging optical lens adjusts the focal length of the imaging optical lens by changing the distance between the two lens groups (Gm, Gn). As can be seen from Figure 32 the moving lens group Gm moves along the optical axis direction relative to the last lens group Gn during the moving focusing process. And the imaging optical lens can be in the first state shown in the upper half of Figure 32 FIG. or Figure 32The second state shown in the lower part. The imaging optical lens being in the first state means the state of the imaging optical lens when the object is at an infinite object distance and the entrance pupil diameter of the imaging optical lens is at its maximum; the imaging optical lens being in the second state means the state of the imaging optical lens when the object is at a finite object distance. Among them, the moving lens group Gm moves toward the object side along the optical axis relative to the last lens group Gn during the moving focusing process when the imaging optical lens changes from the first state to the second state. It should be noted that the lenses in the moving lens group Gm have no relative movement with each other during the moving focusing process, and the lenses in the last lens group Gn have no relative movement with each other during the moving focusing process. In addition, during the moving focusing process, the reflecting element E6 has no relative movement with respect to the last lens group Gn.

[0457] The first lens E1 has a positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, its image-side surface is convex near the optical axis, and both of its surfaces are spherical.

[0458] The second lens E2 has a positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, its image-side surface is concave near the optical axis, both of its surfaces are aspherical, its object-side surface has an inflection point, and its image-side surface has an inflection point.

[0459] The third lens E3 has a negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, its image-side surface is concave near the optical axis, and both of its surfaces are aspherical.

[0460] The fourth lens E4 has a negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, its image-side surface is convex near the optical axis, both of its surfaces are aspherical, its object-side surface has two inflection points, its image-side surface has two inflection points, its object-side surface has a convex critical point and a concave critical point off the axis, and its image-side surface has a concave critical point off the axis.

[0461] The reflecting element E6 is made of glass. It is arranged along the optical axis between the fourth lens E4 and the imaging surface IMG and does not affect the focal length of the imaging optical lens. The reflecting element E6 is a prism and has the function of deflecting the optical path. For the sake of convenience of explanation, Figure 32 the deflection effect of the reflecting element E6 on the optical path is omitted from the drawing. However, the reflecting element E6 can have various different forms according to actual design requirements, so as to cause different deflection effects on the optical path. Among them, the reflecting element E6 in this embodiment can, for example, have a structure similar to Figures 57 to 64 and reference can be made to the foregoing corresponding Figures 57 to 64 description and will not be elaborated here.

[0462] The material of the filter element E7 is glass. It is disposed between the reflection element E6 and the imaging surface IMG, and does not affect the focal length of the imaging optical lens.

[0463] Please refer to Tables 11A to 11D below.

[0464]

[0465]

[0466] The definitions described in Table 11B are the same as those in the first embodiment. It should be understood that only two moving focusing states, such as the first state and the second state, are disclosed in this embodiment. However, the present disclosure is not limited to the disclosed states, and the imaging optical lens of this embodiment may have other moving focusing states with different focal lengths between the first state and the second state to correspond to the focusing states of other different object distances.

[0467] As can be seen from Table 11B, the imaging optical lens performs a moving focusing process according to the change of the object distance, and the moving lens group Gm moves toward the object side along the optical axis direction relative to the last lens group Gn during the moving focusing process when the imaging optical lens changes from the first state to the second state. Specifically, when the object distance changes from infinity to 230.138 mm, the imaging optical lens changes from the first state to the second state, and the distance D1 between the moving lens group Gm and the last lens group Gn on the optical axis increases from 0.060 mm in the first state to 1.434 mm in the second state, while the reflection element E6 has no relative movement relative to the last lens group Gn during the moving focusing process. That is, when the object distance gradually decreases, the moving lens group Gm moves toward the object side along the optical axis direction relative to the last lens group Gn during the moving focusing process.

[0468]

[0469] In the eleventh embodiment, the curve equation of the aspherical surface is expressed in the same form as that in the first embodiment. In addition, in the imaging optical lens of the eleventh embodiment, the first lens E1 is the lens closest to the object side, and the fourth lens E4 is the lens closest to the image side. Except that the lens closest to the image side described above is the fourth lens E4, which is different from the first embodiment, the definitions described in Table 11D below are the same as those in the first embodiment and will not be elaborated here. It should be particularly noted that in this embodiment, the lens closest to the image side is the fourth lens E4. Therefore, in Table 11D below, BLL is the distance from the image-side surface of the fourth lens E4 to the imaging surface IMG on the optical axis when the imaging optical lens is in the first state, BLS is the distance from the image-side surface of the fourth lens E4 to the imaging surface IMG on the optical axis when the imaging optical lens is in the second state, TDL is the distance from the object-side surface of the first lens E1 to the image-side surface of the fourth lens E4 on the optical axis when the imaging optical lens is in the first state, and TDS is the distance from the object-side surface of the first lens E1 to the image-side surface of the fourth lens E4 on the optical axis when the imaging optical lens is in the second state.

[0470]

[0471] <The Twelfth Embodiment>

[0472] Please refer to Figure 35 , which is a perspective schematic diagram of an imaging device according to the twelfth embodiment of the present disclosure. In this embodiment, the imaging device 100 is a camera module. The imaging device 100 includes an imaging lens 101, a driving device 102, an electronic photosensitive element 103, and an image stabilization module 104. The imaging lens 101 includes the imaging optical lens of the first embodiment described above, a lens barrel (not labeled separately) for carrying the imaging optical lens, and a support device (Holder Member, not labeled separately). The imaging lens 101 can also be configured with the imaging optical lenses of the other embodiments described above, and the present disclosure is not limited thereto. The imaging device 100 uses the imaging lens 101 to collect light to generate an image, cooperates with the driving device 102 to perform image focusing, and finally forms an image on the electronic photosensitive element 103 and can output it as image data.

[0473] The driving device 102 may have an auto-focus function, and its driving method may use driving systems such as a voice coil motor (VCM), a micro electro-mechanical systems (MEMS), a piezoelectric system, and a shape memory alloy. The driving device 102 may include a guiding element, and the guiding element may include a ball type or a columnar structure, which helps to reduce the resistance of the moving lens group during the moving focusing process. The driving device 102 can enable the imaging lens 101 to obtain a better imaging position, and can provide clear images for the object at different object distances. In addition, the imaging device 100 is equipped with an electronic photosensitive element 103 with good sensitivity and low noise (such as CMOS, CCD) disposed on the imaging surface of the imaging optical lens, which can truly present the good imaging quality of the imaging optical lens. The electronic photosensitive element 103 can also move in three-dimensional directions relative to the base, and the focusing is achieved by moving the electronic photosensitive element 103.

[0474] The image stabilization module 104 is, for example, an accelerometer, a gyroscope, or a Hall effect sensor. The driving device 102 can be combined with the image stabilization module 104 to jointly serve as an optical image stabilization (OIS) device, which compensates for the blurred image generated by shaking during the shooting instant by adjusting the changes in different axial directions of the imaging lens 101, or uses the image compensation technology in the image software to provide an electronic image stabilization (EIS) function, further improving the imaging quality in dynamic and low-light scenes.

[0475] <The Thirteenth Embodiment>

[0476] Please refer to Figures 36 to 38 where Figure 36 FIG. shows a perspective view of one side of an electronic device according to the thirteenth embodiment of the present disclosure, Figure 37 FIG. shows Figure 36 a perspective view of the other side of the electronic device of Figure 38 and FIG. shows Figure 36 a system block diagram of the electronic device of

[0477] In this embodiment, the electronic device 200 is a smart phone. The electronic device 200 includes the imaging device 100 of the twelfth embodiment, imaging devices 100a, 100b, 100c, 100d, 100e, a flash module 201, a focus assist module 202, an image signal processor 203 (Image Signal Processor), a display module 204, and an image software processor 205. The imaging device 100, imaging devices 100a, and 100b are all disposed on the same side of the electronic device 200 and are all single-focus. The focus assist module 202 can adopt a laser rangefinder or a time-of-flight (ToF) module, but the present disclosure is not limited thereto. The imaging devices 100c, 100d, 100e, and the display module 204 are all disposed on the other side of the electronic device 200, and the display module 204 can be a user interface, so that the imaging devices 100c, 100d, and 100e can be used as front cameras to provide a self-shooting function, but the present disclosure is not limited thereto. Moreover, the imaging devices 100a, 100b, 100c, 100d, and 100e can all include the imaging optical lens of the present disclosure and can all have a structural configuration similar to that of the imaging device 100. Specifically, each of the imaging devices 100a, 100b, 100c, 100d, and 100e can include an imaging lens, a driving device, an electronic photosensitive element, and an image stabilization module, and can all include a reflecting element as an element for turning the optical path. Among them, the imaging lenses of the imaging devices 100a, 100b, 100c, 100d, and 100e can each include, for example, the imaging optical lens of the present disclosure, a lens barrel for carrying the imaging optical lens, and a supporting device.

[0478] The imaging device 100 is a telephoto imaging device with a turning optical path, the imaging device 100a is a wide-angle imaging device, the imaging device 100b is an ultra-wide-angle imaging device, the imaging device 100c is a wide-angle imaging device, the imaging device 100d is an ultra-wide-angle imaging device, and the imaging device 100e is a time-of-flight imaging device. The imaging devices 100, 100a, and 100b of this embodiment have different viewing angles, so that the electronic device 200 can provide different magnification ratios to achieve the shooting effect of optical zoom. In addition, the imaging device 100e can obtain the depth information of the image. Among them, the turning optical path configuration of the imaging device 100 can, for example, have a structure similar to Figures 46 to 56 and can refer to the corresponding Figures 46 to 56The description thereof will not be repeated herein. The above-described electronic device 200 takes, as an example, including a plurality of imaging devices 100, 100a, 100b, 100c, 100d, 100e. However, the number and configuration of the imaging devices are not intended to limit the present disclosure.

[0479] When the user takes a picture of the object 206, the electronic device 200 uses the imaging device 100, the imaging device 100a or the imaging device 100b to converge light for imaging, activates the flash module 201 for fill light, and uses the object distance information of the object 206 provided by the focus assist module 202 for rapid focusing. Coupled with the image signal processor 203 for image optimization processing, the image quality generated by the imaging optical lens is further improved. The focus assist module 202 can use an infrared or laser focus assist system to achieve rapid focusing. In addition, the electronic device 200 can also use the imaging device 100c, the imaging device 100d or the imaging device 100e for shooting. The display module 204 can use a touch screen, and cooperate with the diverse functions of the image software processor 205 for image shooting and image processing (or can use a physical shooting button for shooting). The image processed by the image software processor 205 can be displayed on the display module 204.

[0480] <The Fourteenth Embodiment>

[0481] Please refer to Figure 39 and Figure 40 where Figure 39 shows a perspective view of one side of an electronic device according to the fourteenth embodiment of the present disclosure, and Figure 40 shows Figure 39 a perspective view of the other side of the electronic device.

[0482] In this embodiment, the electronic device 300 is a smart phone. The electronic device 300 includes the imaging device 100, the imaging device 100f, the imaging device 100g, the imaging device 100h of the twelfth embodiment, and the display module 304. As Figure 39 shown, the imaging device 100, the imaging device 100f and the imaging device 100g are all arranged on the same side of the electronic device 300 and are all single-focus. As Figure 40As shown, the imaging device 100h and the display module 304 are both disposed on the other side of the electronic device 300. The imaging device 100h can be used as a front camera to provide a self-portrait function, but the present disclosure is not limited thereto. Moreover, the imaging devices 100f, 100g, and 100h can all include the imaging optical lens disclosed herein and can all have a structural configuration similar to that of the imaging device 100. Specifically, each of the imaging devices 100f, 100g, and 100h can include an imaging lens, a driving device, an electronic photosensitive element, and an image stabilization module. Among them, the imaging lenses of the imaging devices 100f, 100g, and 100h can each include, for example, the imaging optical lens of the present disclosure, a lens barrel for carrying the imaging optical lens, and a supporting device.

[0483] The imaging device 100 is a telephoto imaging device, the imaging device 100f is a wide-angle imaging device, the imaging device 100g is an ultra-wide-angle imaging device, and the imaging device 100h is a wide-angle imaging device. The imaging devices 100, 100f, and 100g of the present embodiment have different viewing angles, so that the electronic device 300 can provide different magnification ratios to achieve the shooting effect of optical zoom. In addition, as Figure 40 shown, the opening of the imaging device 100h can be non-circular, and the lens barrel or lens inside the imaging device 100h can be cut at the outer diameter to have a cut edge to match the non-circular opening. Thereby, the uniaxial length of the imaging device 100h can be further reduced, which is beneficial to reducing the lens volume, increasing the area ratio of the display module 304 relative to the electronic device 300, and reducing the thickness of the electronic device 300, further achieving module miniaturization. The above electronic device 300 is taken as an example including multiple imaging devices 100, 100f, 100g, 100h, but the number and configuration of the imaging devices are not used to limit the present disclosure.

[0484] <The Fifteenth Embodiment>

[0485] Please refer to Figure 41 , which is a perspective view showing one side of an electronic device according to the fifteenth embodiment of the present disclosure.

[0486] In this embodiment, the electronic device 400 is a smart phone. The electronic device 400 includes the imaging device 100, the imaging device 100i, the imaging device 100j, the imaging device 100k, the imaging device 100m, the imaging device 100n, the imaging device 100p, the imaging device 100q, the imaging device 100r, the flash module 401, the focus assist module, the image signal processor, the display module, and an image software processor (not shown) of the twelfth embodiment. The imaging device 100, the imaging device 100i, the imaging device 100j, the imaging device 100k, the imaging device 100m, the imaging device 100n, the imaging device 100p, the imaging device 100q, and the imaging device 100r are all disposed on the same side of the electronic device 400, while the display module is disposed on the other side of the electronic device 400. Moreover, the imaging device 100i, the imaging device 100j, the imaging device 100k, the imaging device 100m, the imaging device 100n, the imaging device 100p, the imaging device 100q, and the imaging device 100r may all include the optical lens for imaging disclosed herein and may all have a structural configuration similar to that of the imaging device 100, which will not be elaborated herein again.

[0487] The imaging device 100 is a telescopic imaging device with a light path turning, the imaging device 100i is a telescopic imaging device with a light path turning, the imaging device 100j is a wide-angle imaging device, the imaging device 100k is a wide-angle imaging device, the imaging device 100m is an ultra-wide-angle imaging device, the imaging device 100n is an ultra-wide-angle imaging device, the imaging device 100p is a telescopic imaging device, the imaging device 100q is a telescopic imaging device, and the imaging device 100r is a time-of-flight ranging imaging device. The imaging device 100, the imaging device 100i, the imaging device 100j, the imaging device 100k, the imaging device 100m, the imaging device 100n, the imaging device 100p, and the imaging device 100q of this embodiment have different viewing angles, enabling the electronic device 400 to provide different magnification ratios to achieve the shooting effect of optical zoom. In addition, the imaging device 100r can obtain the depth information of the image. Among them, the light path turning configurations of the imaging devices 100 and 100i may, for example, have a similar Figures 46 to 56 structure, which can be referred to the corresponding Figures 46 to 56The description thereof will not be repeated herein. The above electronic device 400 takes the example of including multiple imaging devices 100, 100i, 100j, 100k, 100m, 100n, 100p, 100q, 100r, but the number and configuration of the imaging devices are not used to limit the present disclosure. When the user takes a picture of the object to be photographed, the electronic device 400 uses the imaging device 100, the imaging device 100i, the imaging device 100j, the imaging device 100k, the imaging device 100m, the imaging device 100n, the imaging device 100p, the imaging device 100q or the imaging device 100r to collect light for imaging, activates the flash module 401 for supplementary lighting, and performs subsequent processing in a manner similar to the foregoing embodiments, which will not be repeated herein.

[0488] The imaging device of the present disclosure is not limited to being applied to smart phones. The imaging device can be more applied to a system for mobile focusing according to requirements, and has the characteristics of excellent aberration correction and good imaging quality. For example, the imaging device can be applied in various aspects to electronic devices such as three-dimensional (3D) image capture, digital cameras, mobile devices, tablet computers, smart TVs, network monitoring devices, dash cams, reverse imaging devices, multi-lens devices, identification systems, motion-sensing game consoles, drones, wearable devices and portable video recorders. The foregoing electronic devices are only exemplary to illustrate the actual application examples of the present disclosure, and do not limit the application scope of the imaging device of the present disclosure.

[0489] Although the present disclosure is disclosed above with the foregoing preferred embodiments, it is not used to limit the present disclosure. Any person skilled in the art can make some changes and modifications without departing from the spirit and scope of the present disclosure. Therefore, the patent protection scope of the present disclosure shall be subject to that defined by the claims attached to this specification.

Claims

1. An optical lens for imaging, characterized in that, It includes five lenses. The five lenses are, in order from the object side to the image side along the optical path, the first lens, the second lens, the third lens, the fourth lens, and the fifth lens. And the five lenses respectively have an object-side surface facing the object side direction and an image-side surface facing the image side direction; Among them, the first lens has a positive refractive power. The image-side surface of the second lens is concave near the optical axis. The object-side surface of the third lens is convex near the optical axis. The image-side surface of the third lens is concave near the optical axis. The object-side surface of the fourth lens is convex near the optical axis. The image-side surface of the fourth lens is concave near the optical axis. And when the object is located at an infinite object distance and the entrance pupil diameter of the imaging optical lens is the largest, the imaging optical lens is in a first state; Among them, when the imaging optical lens is in the first state, the distance on the optical axis from the object-side surface of the lens closest to the object side to the image-side surface of the lens closest to the image side is TDL. The distance on the optical axis from the image-side surface of the lens closest to the image side to an imaging surface when the imaging optical lens is in the first state is BLL. The focal length of the imaging optical lens in the first state is fL. The radius of curvature of the image-side surface of the first lens is R2. The radius of curvature of the object-side surface of the fourth lens is R7. The radius of curvature of the image-side surface of the fourth lens is R8. The distance on the optical axis between the third lens and the fourth lens when the imaging optical lens is in the first state is T34L. The thickness of the fourth lens on the optical axis is CT4, and it satisfies the following conditions: 0.10 < TDL / BLL < 0.60; 5.00 < fL / R7 + fL / R8 < 20.00; 0.55 < (R2 + R7) / (R2 - R7) < 1.60; and 0.10 < 10×T34L / CT4 < 5.

00.

2. The optical lens for imaging according to claim 1, wherein The second lens has a negative refractive power; Among them, when the imaging optical lens is in the first state, the distance on the optical axis between the third lens and the fourth lens is T34L. The thickness of the fourth lens on the optical axis is CT4, and it satisfies the following conditions: 0.50 < 10×T34L / CT4 < 2.

00.

3. The optical lens for imaging according to claim 1, wherein The focal length of the imaging optical lens in the first state is fL. The combined focal length of the first lens and the second lens is f12, and it satisfies the following conditions: 0.50 < fL / f12 < 2.

00.

4. The optical lens for imaging according to claim 1, wherein, The focal length of the third lens is f3. The focal length of the fourth lens is f4, and it satisfies the following conditions: -2.00 < f4 / f3 < 0.

10.

5. The optical lens for imaging according to claim 1, characterized in that, The thickness of the first lens on the optical axis is CT1. The thickness of the second lens on the optical axis is CT2, and it satisfies the following conditions: 1.80 < CT1 / CT2 < 8.

00.

6. The optical lens for imaging according to claim 1, wherein, When the imaging optical lens is in the first state, the distance on the optical axis from the object-side surface of the lens closest to the object side to the imaging surface is TLL. The maximum imaging height of the imaging optical lens is ImgH, and it satisfies the following conditions: 5.50 < TLL / ImgH < 10.

00.

7. The optical lens for imaging according to claim 1, wherein The Abbe number of the second lens is V2, the Abbe number of the fourth lens is V4, and the Abbe number of the fifth lens is V5, which satisfy the following conditions: 30.0 < V2 + V4 + V5 < 93.

0.

8. The optical lens for imaging according to claim 1, wherein When the imaging optical lens is in the first state, the focal length is fL, and the focal length of the first lens is f1, which satisfy the following conditions: 0.65 < fL / f1 < 2.

00.

9. The optical lens for imaging according to claim 1, wherein When the imaging optical lens is in the first state, the displacement parallel to the optical axis from the intersection point of the object-side surface of the third lens on the optical axis to the maximum effective radius position of the object-side surface of the third lens is Sag3R1L, the thickness of the third lens on the optical axis is CT3, the maximum effective radius of the object-side surface of the first lens when the imaging optical lens is in the first state is Y1R1L, and the maximum effective radius of the image-side surface of the fifth lens when the imaging optical lens is in the first state is Y5R2L, which satisfy the following conditions: 0.80 < Sag3R1L / CT3 < 2.00; and 1.00 < Y1R1L / Y5R2L < 2.

00.

10. The optical lens for imaging according to claim 1, characterized in that, When the imaging optical lens is in the first state, the distance between the second lens and the third lens on the optical axis is T23L, the displacement parallel to the optical axis from the intersection point of the image-side surface of the second lens on the optical axis to the maximum effective radius position of the image-side surface of the second lens is Sag2R2L, the displacement parallel to the optical axis from the intersection point of the object-side surface of the third lens on the optical axis to the maximum effective radius position of the object-side surface of the third lens is Sag3R1L, and the maximum effective radius of the image-side surface of the second lens when the imaging optical lens is in the first state is Y2R2L, which satisfy the following conditions: 0.05 < (T23L + Sag3R1L - Sag2R2L) / Y2R2L < 0.

50.

11. The imaging optical lens according to claim 1, characterized in that, It further includes a reflection element, where the reflection element is located between the fifth lens and the imaging surface along the optical path direction.

12. An imaging device, characterized in that, Comprising: The imaging optical lens according to claim 1; and An electronic photosensitive element disposed on the imaging surface of the imaging optical lens.

13. An electronic device, characterized in that, Comprising: The imaging device according to claim 12.

14. An optical lens for imaging, characterized in that, It includes five lenses. The five lenses are sequentially the first lens, the second lens, the third lens, the fourth lens, and the fifth lens along the optical path from the object side to the image side, and the five lenses respectively have an object-side surface facing the object side direction and an image-side surface facing the image side direction; Among them, the first lens has a positive refractive power, the image-side surface of the second lens is concave near the optical axis, the object-side surface of the third lens is convex near the optical axis, the object-side surface of the fourth lens is convex near the optical axis, the image-side surface of the fourth lens is concave near the optical axis, and when the object is located at an infinite object distance and the entrance pupil diameter of the imaging optical lens is maximum, the imaging optical lens is in a first state; Wherein, when the imaging optical lens is in the first state, the distance on the optical axis from the object-side surface of the lens closest to the object side to the image-side surface of the lens closest to the image side is TDL, the distance on the optical axis from the image-side surface of the lens closest to the image side to an imaging plane when the imaging optical lens is in the first state is BLL, the focal length of the imaging optical lens in the first state is fL, the focal length of the first lens is f1, the focal length of the second lens is f2, the radius of curvature of the object-side surface of the second lens is R3, the radius of curvature of the image-side surface of the third lens is R6, the radius of curvature of the object-side surface of the fourth lens is R7, and the radius of curvature of the image-side surface of the fourth lens is R8, which satisfy the following conditions: 0.10 < TDL / BLL < 0.60; 5.00 < fL / R7 + fL / R8 < 20.00; -1.50 < (R3 - R6) / (R3 + R6) < 1.40; and |f1 / f2| < 0.

82.

15. The optical lens for imaging according to claim 14, characterized in that, When the imaging optical lens is in the first state, the distance on the optical axis from the object-side surface of the lens closest to the object side to the image-side surface of the lens closest to the image side is TDL, and the distance on the optical axis from the image-side surface of the lens closest to the image side to the imaging plane when the imaging optical lens is in the first state is BLL, which satisfy the following conditions: 0.20 < TDL / BLL < 0.

45.

16. The optical lens for imaging according to claim 14, characterized in that, The object-side surface of the fifth lens is concave near the optical axis, the image-side surface of the fifth lens is convex near the optical axis, and at least one surface of at least one lens in the imaging optical lens has at least one inflection point.

17. The optical lens for imaging according to claim 14, wherein When the imaging optical lens is in the first state, the distance on the optical axis between the fourth lens and the fifth lens is T45L, and the thickness of the fifth lens on the optical axis is CT5, which satisfy the following conditions: 1.00 < T45L / CT5 < 6.

00.

18. The optical lens for imaging according to claim 14, wherein The thickness of the first lens on the optical axis is CT1, and the distance on the optical axis from the object-side surface of the third lens to the image-side surface of the fourth lens when the imaging optical lens is in the first state is Dr5r8L, which satisfy the following conditions: 0.80 < CT1 / Dr5r8L < 3.

50.

19. The imaging optical lens according to claim 14, wherein, When the imaging optical lens is in the first state, the distance on the optical axis between the third lens and the fourth lens is T34L, and the distance on the optical axis between the fourth lens and the fifth lens when the imaging optical lens is in the first state is T45L, which satisfy the following conditions: 0.01 < 10×T34L / T45L < 3.

00.

20. The optical lens for imaging according to claim 14, wherein When the imaging optical lens is in the first state, the distance on the optical axis from the image-side surface of the lens closest to the image side to the imaging plane is BLL, the maximum imaging height of the imaging optical lens is ImgH, the focal length of the imaging optical lens in the first state is fL, and the focal length of the third lens is f3, which satisfy the following conditions: 4.20 < BLL / ImgH < 7.20; and |fL / f3| < 1.

80.

21. The optical lens for imaging according to claim 14, characterized in that, When the imaging optical lens is in the first state, the distance on the optical axis from the object-side surface of the lens closest to the object side to the image-side surface of the lens closest to the image side is TDL. When the imaging optical lens is in the first state, the distance on the optical axis from the image-side surface of the lens closest to the image side to the imaging surface is BLL. When the imaging optical lens is in the first state, the focal length is fL, the focal length of the first lens is f1, the focal length of the second lens is f2, the radius of curvature of the image-side surface of the first lens is R2, the radius of curvature of the object-side surface of the second lens is R3, the radius of curvature of the image-side surface of the third lens is R6, the radius of curvature of the object-side surface of the fourth lens is R7, the radius of curvature of the image-side surface of the fourth lens is R8. When the imaging optical lens is in the first state, the distance on the optical axis between the third lens and the fourth lens is T34L, and the thickness of the fourth lens on the optical axis is CT4, and they satisfy the following conditions: 0.26 ≤ TDL / BLL ≤ 0.39; 7.55 ≤ fL / R7 + fL / R8 ≤ 14.04; 0.64 ≤ (R2 + R7) / (R2 - R7) ≤ 1.12; 0.70 ≤ 10×T34L / CT4 ≤ 1.29; -0.38 ≤ (R3 - R6) / (R3 + R6) ≤ 1.06; and 0.13 ≤ |f1 / f2| ≤ 0.

72.

22. An optical lens for imaging, characterized in that, In the direction of the optical path from the object side to the image side, it sequentially includes a moving lens group and a last lens group. The total number of lenses in the imaging optical lens is at least four. The moving lens group includes at least one lens, the last lens group includes at least one lens, and the lenses in the imaging optical lens respectively have an object-side surface facing the object side and an image-side surface facing the image side; wherein, when the object is at an infinite object distance and the entrance pupil diameter of the imaging optical lens is the largest, the imaging optical lens is in a first state; when the object is at a finite object distance, the imaging optical lens is in a second state; when the object moves from an infinite object distance to a finite object distance, the imaging optical lens performs a moving focusing process to change from the first state to the second state; the moving lens group moves toward the object side along the optical axis relative to the last lens group during the moving focusing process of the imaging optical lens changing from the first state to the second state; wherein, the lens closest to the object side in the moving lens group has a positive refractive power and its object-side surface is convex at the paraxial region; wherein, the imaging optical lens further includes a reflection element, and the reflection element is located between the object and an imaging surface in the direction of the optical path; Among them, when the imaging optical lens is in the first state, the distance on the optical axis from the object-side surface of the lens closest to the object side to the image-side surface of the lens closest to the image side is TDL; when the imaging optical lens is in the second state, the distance on the optical axis from the object-side surface of the lens closest to the object side to the image-side surface of the lens closest to the image side is TDS; when the imaging optical lens is in the first state, the distance on the optical axis from the image-side surface of the lens closest to the image side to the imaging surface is BLL; when the imaging optical lens is in the second state, the distance on the optical axis from the image-side surface of the lens closest to the image side to the imaging surface is BLS, and they satisfy the following conditions: 0.10 < TDL / BLL < 0.60; 1.00 < 10×|TDS - TDL| / TDL < 10.00; and 0.80 < BLS / BLL < 1.

30.

23. The optical lens for imaging according to claim 22, wherein, When the imaging optical lens is in the first state, the distance on the optical axis from the object-side surface of the lens closest to the object side to the image-side surface of the lens closest to the image side is TDL; when the imaging optical lens is in the second state, the distance on the optical axis from the object-side surface of the lens closest to the object side to the image-side surface of the lens closest to the image side is TDS; when the imaging optical lens is in the first state, the distance on the optical axis from the image-side surface of the lens closest to the image side to the imaging surface is BLL; when the imaging optical lens is in the second state, the distance on the optical axis from the image-side surface of the lens closest to the image side to the imaging surface is BLS, and they satisfy the following conditions: 1.80 < 10×|TDS - TDL| / TDL < 5.00; and 0.90 < BLS / BLL < 1.

10.

24. The optical lens for imaging according to claim 22, characterized in that, The imaging optical lens includes five lenses. The five lenses are, in order from the object side to the image side along the optical path, a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. The moving lens group includes the first lens and the second lens, and the last lens group includes the third lens, the fourth lens, and the fifth lens. The lenses in the moving lens group do not move relative to each other during the moving focusing process, and the lenses in the last lens group do not move relative to each other during the moving focusing process.

25. The optical lens for imaging according to claim 24, wherein, When the imaging optical lens is in the first state, the distance on the optical axis from the object-side surface of the lens closest to the object side to the imaging surface is TLL; when the imaging optical lens is in the second state, the distance on the optical axis from the object-side surface of the lens closest to the object side to the imaging surface is TLS, and they satisfy the following conditions: 1.03 < TLS / TLL < 1.

20.

26. The optical lens for imaging according to claim 24, wherein The object-side surface of the fourth lens is convex near the optical axis, and the image-side surface of the fourth lens is concave near the optical axis.

27. The optical lens for imaging according to claim 24, characterized in that, The reflective element has at least two reflective surfaces; Among them, when the imaging optical lens is in the first state, the aperture value is FnoL, and when the imaging optical lens is in the second state, the aperture value is FnoS, and they satisfy the following conditions: 0.80 < FnoL / FnoS < 0.

90.

28. The optical lens for imaging according to claim 24, wherein When the imaging optical lens is in the first state, the distance between the fourth lens and the fifth lens on the optical axis is T45L, and the thickness of the fourth lens on the optical axis is CT4, which satisfies the following conditions: 0.50 < T45L / CT4 < 6.

00.

29. The optical lens for imaging according to claim 22, wherein When the object is located at an infinite object distance and the entrance pupil diameter of the imaging optical lens is the smallest, the imaging optical lens is in a third state; wherein, the aperture value of the imaging optical lens in the first state is FnoL, and the aperture value of the imaging optical lens in the third state is FnoV, which satisfies the following conditions: 0.50 < FnoV - FnoL < 1.

20.

30. The optical lens for imaging according to claim 22, characterized in that, When the imaging optical lens is in the first state, the distance on the optical axis from the object-side surface of the lens closest to the object side to the image-side surface of the lens closest to the image side is TDL. When the imaging optical lens is in the second state, the distance on the optical axis from the object-side surface of the lens closest to the object side to the image-side surface of the lens closest to the image side is TDS. When the imaging optical lens is in the first state, the distance on the optical axis from the image-side surface of the lens closest to the image side to the imaging plane is BLL. When the imaging optical lens is in the second state, the distance on the optical axis from the image-side surface of the lens closest to the image side to the imaging plane is BLS, which satisfies the following conditions: 0.26 ≤ TDL / BLL ≤ 0.39; 1.97 ≤ 10×|TDS - TDL| / TDL ≤ 4.02; and 1.00 ≤ BLS / BLL ≤ 1.

05.

31. An optical lens for imaging, characterized in that, Along the optical path direction from the object side to the image side, it sequentially includes a moving lens group, a last lens group, and a prism. The moving lens group includes at least one lens, the last lens group includes at least one lens, and the lenses in the imaging optical lens respectively have an object-side surface facing the object side and an image-side surface facing the image side; wherein, when the object is located at an infinite object distance and the entrance pupil diameter of the imaging optical lens is the largest, the imaging optical lens is in a first state; when the object is located at a finite object distance, the imaging optical lens is in a second state; when the object moves from an infinite object distance to a finite object distance, the imaging optical lens performs a moving focusing process to change from the first state to the second state; the moving lens group moves along the optical axis direction relative to the last lens group during the moving focusing process of the imaging optical lens changing from the first state to the second state; wherein, the object-side surface of the lens closest to the object side in the imaging optical lens is convex at the paraxial region; wherein, there is no other interpolated lens on the optical axis between the last lens group and the prism; wherein, the prism has at least three reflecting surfaces.

32. The optical lens for imaging according to claim 31, wherein When the imaging optical lens is in the first state, the distance on the optical axis from the object-side surface of the lens closest to the object side to the image-side surface of the lens closest to the image side is TDL. When the imaging optical lens is in the second state, the distance on the optical axis from the object-side surface of the lens closest to the object side to the image-side surface of the lens closest to the image side is TDS, and they satisfy the following conditions: 1.20 < 10×|TDS - TDL| / TDL < 8.

00.

33. The optical lens for imaging according to claim 31, characterized in that, During the moving focusing process, the prism has no relative movement with respect to the last lens group.

34. The optical lens for imaging according to claim 31, wherein The prism further has a first penetration surface. The at least three reflecting surfaces of the prism include a first reflecting surface, a second reflecting surface, and a third reflecting surface in sequence from the object side to the image side along the optical path direction, and the first penetration surface and the second reflecting surface are in the same plane.

35. The imaging optical lens according to claim 31, wherein, The imaging optical lens includes five lenses. The five lenses are, in sequence from the object side to the image side along the optical path, a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. The moving lens group includes the first lens and the second lens. The last lens group includes the third lens, the fourth lens, and the fifth lens. The lenses in the moving lens group have no relative movement with respect to each other during the moving focusing process, and the lenses in the last lens group have no relative movement with respect to each other during the moving focusing process.

36. The optical lens for imaging according to claim 35, wherein The object-side surface of the fourth lens is convex near the optical axis, and the image-side surface of the fourth lens is concave near the optical axis.

Images