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. The first lens element has positive refractive power. The first lens element has an object-side surface being convex in a paraxial region thereof. The second lens element has an object-side surface being convex in a paraxial region thereof. The second lens element has an image-side surface being concave in a paraxial region thereof. The third lens element has negative refractive power. The third lens element has an object-side surface being concave in a paraxial region thereof. The fourth lens element has positive refractive power. At least one lens in the imaging optical lens has an inflection point. When a shot object is in an infinite object distance, the optical lens for imaging is in a first state. 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, an image capturing device and an electronic device, in particular, to an optical lens and an image capturing device suitable for an electronic device. BACKGROUND

[0002] With the advancement of semiconductor process technology, the performance of electronic photosensitive elements has been improved, and the size of pixels can reach a smaller size. Therefore, optical lenses with high imaging quality are indispensable.

[0003] In recent years, electronic products have been pursuing thinness, so traditional camera lenses are difficult to meet the needs of high specifications and miniaturization, especially micro lenses with large apertures or telephoto features. Gradually, the conventional telephoto lens technology cannot meet the demand (total length is too long, aperture is too small, quality is insufficient or cannot be miniaturized), so different optical features or configurations with optical axis folding are needed to solve the problem. Because of the thickness limitation of electronic devices, some optical lenses will be cut in the lens barrel or lens to reduce the single-axis length, which helps to save module space, and can also be combined with reflective elements to provide different light path directions for the system, giving the lens more flexible use of space to exhibit the telephoto effect of long focal length.

[0004] With the rapid development of technology, electronic devices equipped with optical lenses have a wider range of applications, and the requirements for optical lenses are more diverse. Since existing optical lenses are less likely to balance the demands of imaging quality, sensitivity, aperture size, volume, or viewing angle, the present disclosure provides an optical lens with high imaging quality to meet the needs. SUMMARY

[0005] The present disclosure provides an optical lens, an image capturing device and an electronic device. The optical lens includes a plurality of lenses arranged in order from an object side to an image side along a direction of an optical path. When certain conditions are met, the optical lens provided by the present disclosure can simultaneously meet the needs of mobile focusing function, telephoto function, miniaturization and high imaging quality.

[0006] The present disclosure provides an optical lens for imaging, comprising five lenses. The five lenses are sequentially arranged from an object side to an image side along an optical path direction as 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 positive refractive power. Preferably, the object side surface of the first lens is convex at a vicinity of an optical axis. Preferably, the object side surface of the second lens is convex at a vicinity of an optical axis. Preferably, the image side surface of the second lens is concave at a vicinity of an optical axis. Preferably, the third lens has negative refractive power. Preferably, the object side surface of the third lens is concave at a vicinity of an optical axis. Preferably, the fourth lens has positive refractive power. Preferably, at least one surface of at least one lens in the optical lens for imaging has at least one inflection point. When an object is located at an infinite object distance, the optical lens for imaging is in a first state. A distance from the image side surface of the lens closest to the image side to an imaging plane on the optical axis when the optical lens for imaging is in the first state is BLL, a 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 when the optical lens for imaging is in the first state is TDL, a curvature radius of the object side surface of the first lens is R1, a curvature radius of the object side surface of the third lens is R5, a focal length of the second lens is f2, and a focal length of the third lens is f3. Preferably, the following conditions are satisfied:

[0007] 2.00 < BLL / TDL < 5.50;

[0008] -0.50 < (R1-R5) / (R1+R5) < 5.00; and

[0009] 0 < |f3 / f2| < 1.00.

[0010] The present disclosure also provides an optical lens for imaging, comprising five lenses. The five lenses are sequentially arranged from an object side to an image side along an optical path direction as 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 positive refractive power. Preferably, the object side surface of the first lens is convex at a vicinity of an optical axis. Preferably, the object side surface of the second lens is convex at a vicinity of an optical axis. Preferably, the third lens has negative refractive power. Preferably, the object side surface of the third lens is concave at a vicinity of an optical axis. Preferably, the fourth lens has positive refractive power. Preferably, at least one surface of at least one lens in the optical lens for imaging has at least one inflection point. When an object is located at an infinite object distance, the optical lens for imaging is in a first state. A distance from the image side surface of the lens closest to the image side to an imaging plane on the optical axis in the optical lens for imaging in the first state is BLL, a 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 in the optical lens for imaging in the first state is TDL, a refractive index of the first lens is N1, a refractive index of the fifth lens is N5, an Abbe number of the fifth lens is V5, a thickness of the fifth lens on the optical axis is CT5, and a separation distance between the fourth lens and the fifth lens on the optical axis in the optical lens for imaging in the first state is T45L, which preferably satisfies the following conditions:

[0011] 2.00 < BLL / TDL < 5.50;

[0012] 1.750 < N1 < 2.200;

[0013] 5.00 < V5 / N5 < 15.20; and

[0014] 0.10 < CT5 / T45L < 3.00.

[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 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. Among them, when the object is located at an infinite object distance, 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 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 optical lens for imaging changing from the first state to the second state. Preferably, the object side surface of the lens closest to the object side in the optical lens for imaging is convex near the optical axis. Preferably, at least one surface of at least one lens in the optical lens for imaging has at least one inflection point. The distance from the image side surface of the lens closest to the image side to the imaging surface on the optical axis when the optical lens for imaging is in the first state is BLL, 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 when the optical lens for imaging is in the first state is TDL, and the aperture value of the optical lens for imaging in the first state is FnoL, which preferably satisfies the following conditions:

[0016] 2.00 < BLL / TDL < 5.50; and

[0017] 1.80 < FnoL < 2.50.

[0018] The present disclosure provides an imaging device, which includes the aforementioned optical lens for imaging and an electronic photosensitive element, wherein the electronic photosensitive element is disposed on the imaging surface of the optical lens for imaging.

[0019] The present disclosure provides an electronic device, which includes the aforementioned imaging device.

[0020] When BLL / TDL satisfies the above conditions, the appropriate back focal length can be adjusted to facilitate optical path folding.

[0021] When (R1 - R5) / (R1 + R5) satisfies the above conditions, the curvature radii of the object side surface of the first lens and the object side surface of the third lens can be adjusted to make these two surfaces have a more curved surface shape, which helps to maintain the back focal length and increase the imaging surface simultaneously.

[0022] When |f3 / f2| satisfies the above conditions, the refractive powers of the second lens and the third lens can be balanced, which helps to balance the convergence or divergence of light rays to improve the light condensing quality of the entire field of view.

[0023] When N1 meets the above conditions, the refractive index of the first lens can be adjusted, which helps the first lens to have a strong ability to converge light while reducing the impact of temperature effects on imaging.

[0024] When the V5 / N5 meets the above conditions, the material configuration of the fifth lens can be adjusted, which helps to balance the chromatic aberration correction between different wavelengths of light, thereby improving the image quality.

[0025] When the CT5 / T45L meets the above conditions, the large distance between the fourth and fifth lenses helps to balance the incident angle of light on the imaging plane during focusing, thereby avoiding the generation of stray light.

[0026] When FnoL meets the above conditions, it can achieve a balance between illumination and depth of field, and can enhance the amount of light entering the camera to improve image quality.

[0027] The foregoing description of the contents of this disclosure and the following description of the embodiments are used to demonstrate and explain the spirit and principles of this disclosure, and to provide a further explanation of the claims of this disclosure. Attached Figure Description

[0028] Figure 1 The diagram illustrates the imaging device according to the first embodiment of this disclosure in a first state and a second state.

[0029] Figure 2 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the first embodiment in its first state.

[0030] Figure 3 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the first embodiment in the second state.

[0031] Figure 4 Schematic diagrams of the imaging device according to the second embodiment of this disclosure in a first state and a second state are shown.

[0032] Figure 5 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the second embodiment in its first state.

[0033] Figure 6 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the second embodiment in the second state.

[0034] Figure 7 Schematic diagrams of the imaging device according to the third embodiment of this disclosure in a first state and a second state are shown.

[0035] Figure 8From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the third embodiment in its first state.

[0036] Figure 9 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the third embodiment in the second state.

[0037] Figure 10 The diagram illustrates the imaging device according to the fourth embodiment of this disclosure in a first state and a second state.

[0038] Figure 11 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the fourth embodiment in its first state.

[0039] Figure 12 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the fourth embodiment in the second state.

[0040] Figure 13 Schematic diagrams of the imaging device according to the fifth embodiment of this disclosure in a first state and a second state are shown.

[0041] Figure 14 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the fifth embodiment in its first state.

[0042] Figure 15 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the fifth embodiment in the second state.

[0043] Figure 16 Schematic diagrams of the imaging device according to the sixth embodiment of this disclosure in a first state and a second state are shown.

[0044] Figure 17 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the sixth embodiment in its first state.

[0045] Figure 18 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the sixth embodiment in the second state.

[0046] Figure 19 Schematic diagrams of the imaging device according to the seventh embodiment of this disclosure in a first state and a second state are shown.

[0047] Figure 20 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the seventh embodiment in its first state.

[0048] Figure 21From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the seventh embodiment in the second state.

[0049] Figure 22 Schematic diagrams of the imaging device according to the eighth embodiment of this disclosure in a first state and a second state are shown.

[0050] Figure 23 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the eighth embodiment in its first state.

[0051] Figure 24 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the eighth embodiment in the second state.

[0052] Figure 25 Schematic diagrams of the imaging device according to the ninth embodiment of this disclosure in a first state and a second state are shown.

[0053] Figure 26 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the ninth embodiment in its first state.

[0054] Figure 27 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the ninth embodiment in the second state.

[0055] Figure 28 Schematic diagrams of the imaging apparatus according to the tenth embodiment of this disclosure in a first state and a second state are shown.

[0056] Figure 29 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the tenth embodiment in its first state.

[0057] Figure 30 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the tenth embodiment in the second state.

[0058] Figure 31 A perspective view of an imaging device according to the eleventh embodiment of this disclosure is shown.

[0059] Figure 32 A perspective view of one side of an electronic device according to the twelfth embodiment of this disclosure is shown.

[0060] Figure 33 Draw Figure 32 A three-dimensional diagram of the other side of the electronic device.

[0061] Figure 34 Draw Figure 32 System block diagram of an electronic device.

[0062] Figure 35 A schematic diagram of one side of an electronic device according to the thirteenth embodiment of this disclosure is shown.

[0063] Figure 36 Draw Figure 35 A schematic diagram of the other side of the electronic device.

[0064] Figure 37 A perspective view of one side of an electronic device according to the fourteenth embodiment of this disclosure is shown.

[0065] Figure 38 A schematic diagram illustrating the parameters Y1R1L, Y5R2L, ET12L, Sag2R1L and ImgH of the imaging device according to the first embodiment of this disclosure in the first state.

[0066] Figure 39 A schematic diagram illustrating the inflection point and the critical point on the lens surface of the imaging device according to the first embodiment of this disclosure in a first state.

[0067] Figure 40 A schematic diagram illustrating the shape configuration of the aperture of an imaging optical lens in accordance with an embodiment of this disclosure.

[0068] Figure 41 A schematic diagram illustrating the shape configuration of the aperture of an imaging optical lens in another embodiment of this disclosure.

[0069] Figures 42 to 44 Schematic diagrams are shown illustrating one configuration of a reflective element in an imaging optical lens according to the present invention.

[0070] Figure 45 and Figure 46 A schematic diagram illustrating one configuration of the two reflective elements disclosed herein in an imaging optical lens is shown.

[0071] Figure 47 A schematic diagram illustrating one configuration of a dual-reflection element in an imaging optical lens according to the present disclosure is shown.

[0072] Figure 48 A schematic diagram illustrating one configuration of a three-reflection element in an imaging optical lens according to the present disclosure is shown.

[0073] Figure 49 A schematic diagram illustrating one configuration of four reflective elements in an imaging optical lens according to the present disclosure is shown.

[0074] Figure 50 A schematic diagram illustrating one configuration of five reflective elements in an imaging optical lens according to the present disclosure is shown.

[0075] Figure 51 A schematic diagram illustrating an arrangement of a reflective element in an imaging optical lens according to the present disclosure is shown.

[0076] Figure 52 A schematic diagram illustrating another configuration of a reflective element in an imaging optical lens according to the present disclosure is shown.

[0077] Figure 53 A schematic diagram illustrating the optical path reversal in the first state of the configuration of the imaging device and a reflective element according to the first embodiment of this disclosure.

[0078] Figure 54 A schematic diagram illustrating the optical path reversal in the first state of the configuration of the imaging device with another reflective element according to the first embodiment of this disclosure.

[0079] Figure 55 A schematic diagram illustrating the optical path reversal in the first state of the configuration of the imaging device with another reflective element according to the first embodiment of this disclosure.

[0080] Figure 56 A schematic diagram illustrating the optical path reversal in the first state of the configuration of the imaging device with another reflective element according to the first embodiment of this disclosure.

[0081] Figure 57 A schematic diagram illustrating the optical path reversal in the first state of the configuration of the imaging device with another reflective element according to the first embodiment of this disclosure.

[0082] Figure 58 A schematic diagram illustrating the optical path reversal in the first state of the configuration of the imaging device with another reflective element according to the first embodiment of this disclosure.

[0083] Figure 59 The diagram illustrates the configuration and optical path reversal of the imaging device with one of the reflective elements in the first embodiment of this disclosure in the first state and the second state, respectively.

[0084] Figure 60 A schematic diagram illustrating one embodiment of the reflective element according to the first embodiment of this disclosure is shown.

[0085] Figure 61 Draw Figure 60 The reflective element has not yet been formed into a three-dimensional schematic diagram with cut edges and grooves.

[0086] Figure 62 Draw Figure 60 A three-dimensional schematic diagram showing that the reflective element has tangled edges and grooves.

[0087] [Symbol Explanation]

[0088] 1,2,3,4,5,6,7,8,9,10,100,100a,100b,100c,100d,100e,100f,100g,100h,100i,100j,100k,100m,100n,100p,100q,100r: imaging device

[0089] 101: Imaging Lens

[0090] 102: Drive unit

[0091] 103: Electronic photosensitive element

[0092] 104: Image Stabilization Module

[0093] 200, 300, 400: Electronic devices

[0094] 201,401: Flash module

[0095] 202: Focusing Assist Module

[0096] 203: Image Signal Processor

[0097] 204, 304: Display module

[0098] 205: Image Software Processor

[0099] 206: Subject

[0100] C: Critical point

[0101] P: Inversion point

[0102] S1, S2, S3, S4: Aperture

[0103] E1: First lens

[0104] E2: Second lens

[0105] E3: Third Lens

[0106] E4: Fourth Lens

[0107] E5: Fifth Lens

[0108] E6: Reflective element

[0109] E7: Filter element

[0110] IMG: Imaging Surface

[0111] IS: Electronic photosensitive element

[0112] G1: Moving lens group

[0113] G2: The final lens group

[0114] LG: Lens Group

[0115] LF, LF1, LF2: Reflective elements

[0116] FT: Filter element

[0117] LP1, LP2: Penetration surfaces

[0118] RF1, RF2, RF3, RF4, RF5: Reflecting surfaces

[0119] OA, OA1, OA2, OA3, OA4, OA5, OA6: Optical axes

[0120] ST: Aperture

[0121] LX: Long Wheelbase

[0122] SY: Short axis

[0123] Ra,Rb: Effective radius

[0124] NPR: Non-optical effective path region

[0125] CP: Cutting edge

[0126] RP: Groove

[0127] ET12L: The distance between the maximum effective radius of the image-side surface of the first lens and the maximum effective radius of the object-side surface of the second lens, parallel to the optical axis, in the first state of the imaging optical lens.

[0128] ImgH: Maximum imaging height of the imaging optical lens

[0129] Sag2R1L: The displacement parallel to the optical axis from the point where the object-side surface of the second lens intersects the optical axis to the position of the maximum effective radius of the object-side surface of the second lens when the imaging optical lens is in its first state.

[0130] Y1R1L: The maximum effective radius of the object-side surface of the first lens when the imaging optical lens is in the first state.

[0131] Y5R2L: The maximum effective radius of the image-side surface of the fifth lens of the imaging optical lens in the first state. Detailed Implementation

[0132] An imaging optical lens comprises, sequentially from the object side to the image side along the optical path, a movable lens group and a final lens group. The movable lens group includes at least one lens, and the final lens group includes at least one lens. The lenses in the imaging optical lens each have an object-side surface facing the object side and an image-side surface facing the image side. This arrangement of the two lens groups allows for a balance between size, adjustable focusing range across object distances, image quality, and ease of assembly.

[0133] When the subject is at infinity, the imaging optical lens is in a first state. When the subject is at a finite object distance, the imaging optical lens is in a second state. When the subject moves from infinity to a finite object distance, the imaging optical lens performs a focusing process to transition from the first state to the second state. Conversely, when the subject moves from a finite object distance to infinity, the imaging optical lens also performs a focusing process to transition from the second state to the first state. The object distance refers to the distance along the optical axis from the subject to the object-side surface of the lens closest to the object side of the imaging optical lens. When the object distance is 1,000,000 mm or more, it can be considered a shooting state with an infinity object distance. When the object distance is 5,000 mm or less, it can be considered a shooting state with a finite object distance.

[0134] The movable lens group moves along the optical axis relative to the final lens group during the focusing process of the imaging optical lens transitioning from the first state to the second state. This helps achieve a close-up effect and simplifies the complexity of the optical design and mechanism. Specifically, the movable lens group can move towards the object side relative to the final lens group along the optical axis during the focusing process of the imaging optical lens transitioning from the first state to the second state. Please refer to... Figure 1 This is a schematic diagram illustrating the imaging device according to the first embodiment of this disclosure in a first state (object distance infinity) and a second state (object distance finite), wherein... Figure 1 The upper part is a schematic diagram of the imaging optical lens in its first state, while Figure 1 The lower half of the diagram is a schematic diagram of the imaging optical lens in the second state.

[0135] The lenses in the moving lens group can remain stationary relative to each other during the focusing process, and ultimately, the lenses in the final lens group can also remain stationary relative to each other during the focusing process. This simplifies the complexity of the mechanism.

[0136] In an imaging optical lens, the lens closest to the object side can have a convex surface near the optical axis. This allows adjustment of the surface shape of the lens closest to the object side, which helps to compress the outer diameter of the object-side end of the imaging optical lens.

[0137] The optical lens for imaging disclosed in the present disclosure may further include a reflection element, wherein the reflection element may be located between the last lens group and the imaging surface along the optical path direction, and there are no other lenses on the optical axis between the last lens group and the reflection element. Thereby, different optical path directions can be provided for the optical lens for imaging, making the spatial configuration of the lens more flexible, which helps to reduce the mechanical limitations and miniaturize the lens.

[0138] During the moving focusing process, the last lens group may have no relative movement with respect to the reflection element. Thereby, it helps to simplify the complexity of the mechanical design, which is beneficial to improving the qualified rate of lens assembly.

[0139] The reflection element may be a prism, and the prism may have at least two reflection surfaces; thereby, by the light being reflected multiple times inside the prism and imaged, it helps to reduce the overall volume of the imaging device. Among them, the prism may further have a first penetration surface, and at least two reflection surfaces of the prism may sequentially include a first reflection surface and a second reflection surface along the optical path direction from the object side to the image side. The first penetration surface, the first reflection surface, and the second reflection surface are arranged in sequence along the optical path direction from the object side to the image side, and the first penetration surface and the second reflection surface may be located on the same plane; thereby, it helps to simplify the structure of the prism and reduce the space required for the prism. Among them, the prism may also have at least three reflection surfaces. Please refer to Figure 59 , which is a schematic diagram showing the configuration relationship and optical path turning of an imaging device with one of the reflection elements in the first state and in the second state according to the first embodiment of the present disclosure, wherein Figure 59 the upper half of Figure 59 is a schematic diagram of the optical lens for imaging in the first state, and Figure 59 the lower half of

[0140] The focal length of the optical lens for imaging in the first state is fL, and the focal length of the moving lens group is fG1, which may satisfy the following condition: 0.80 < fL / fG1 < 1.80. Thereby, the focal length of the moving lens group can be adjusted, so that during the moving focusing process, it helps to balance the movement amount and maintain the back focal length under a limited space configuration. Among them, the following condition may also be satisfied: 0.95 < fL / fG1 < 1.70. The focal length of the moving lens group may refer to the combined focal length of all lenses in the moving lens group.

[0141] 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 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 following conditions can be satisfied: 0.30 mm < |TDS - TDL| < 1.10 mm. Thus, by moving the lens group with a configuration having more lenses, it helps to move the lens group with a smaller movement amount during the moving focus process to photograph an object with a smaller object distance. Among them, the following conditions can also be satisfied: 0.50 mm < |TDS - TDL| < 0.95 mm.

[0142] The distance on the optical axis from the object-side surface of the lens closest to the object side in the moving lens group to the image-side surface of the lens closest to the image side in the moving lens group is DG1, and the distance on the optical axis from the object-side surface of the lens closest to the object side in the last lens group to the image-side surface of the lens closest to the image side in the last lens group is DG2, and the following conditions can be satisfied: 0.01 < DG2 / DG1 < 0.40. Thus, the length of the moving lens group on the optical axis and the length of the last lens group on the optical axis can be adjusted, which helps to balance the spatial configuration of the lenses to reduce the system sensitivity during the focusing process. Among them, the following conditions can also be satisfied: 0.02 < DG2 / DG1 < 0.30. Among them, the following conditions can also be satisfied: 0.04 < DG2 / DG1 < 0.20.

[0143] 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 is TDS. 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 is TDL, and the following conditions can be satisfied: 1.00 < 10×|TDS - TDL| / TDL < 2.50. Thus, by maintaining the movement amount of the moving lens group during the moving focus process, it helps to photograph an object with a smaller object distance and meet the requirements of the large-size photosensitive element specifications, which helps to improve the imaging quality. Among them, the following conditions can also be satisfied: 1.40 < 10×|TDS - TDL| / TDL < 2.42.

[0144] 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. 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, and the following conditions can be satisfied: 1.025 < TLS / TLL < 1.100. Thus, by controlling the total lens length during the moving focus process, it helps to improve the imaging quality of photographing an object with a smaller object distance under the limitation of the size of the electronic device. Among them, the following conditions can also be satisfied: 1.030 < TLS / TLL < 1.080.

[0145] An imaging optical lens may comprise five lenses, arranged sequentially from the object side to the image side along the optical path as a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. A movable lens group may comprise the first, second, third, and fourth lenses, and the final lens group may comprise the fifth lens. 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.

[0146] The first lens may have positive refractive power; thereby, the refractive power of the movable lens group can be adjusted to converge light, thus helping to simultaneously control the shooting angle and increase the amount of light entering. The object-side surface of the first lens may be convex near the optical axis; thereby, it helps to compress the outer diameter of the object-side end of the imaging optical lens. The first lens may be made of glass; thereby, using a glass lens can effectively reduce sensitivity to environmental factors and provide high stability in various environments. Furthermore, using a glass lens near the object-side end of the imaging optical lens helps to resist humid environments and prevent surface scratches, effectively extending the lifespan of electronic products.

[0147] The second lens can have positive refractive power; this helps to balance the back focal length of the imaging lens and correct off-axis aberrations. The object-side surface of the second lens can be convex near the optical axis; this allows adjustment of the second lens's shape and refractive power, helping to improve central image quality. The image-side surface of the second lens can be concave near the optical axis; this allows adjustment of the second lens's refractive power, helping to balance spherical aberration in the imaging lens.

[0148] The third lens can have negative refractive power; this allows adjustment of the refractive power of the third lens, helping to maintain the back focal length. The object-side surface of the third lens can be concave near the optical axis; this allows control of the direction of light rays around the third lens, preventing insufficient refraction of light rays in the peripheral area from causing ineffective light focusing.

[0149] The fourth lens can have positive refractive power. This effectively balances the refractive power of the third lens, preventing excessive aberrations caused by excessive light refraction angle.

[0150] The fifth lens can have negative refractive power. This can balance the refractive power at the image side of the imaging lens, thereby improving the light-gathering quality of each field of view at the imaging plane and reducing aberrations.

[0151] At least one surface of at least one lens in an imaging optical lens may have at least one inflection point. Specifically, in an imaging optical lens, one or more lenses may each have at least one inflection point on at least one surface, and the statement that at least one surface of a 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. This increases the degree of freedom in optical design, facilitating astigmatism correction. Please refer to... Figure 39 This is a schematic diagram illustrating the inflection point P on the lens surface of the image-capturing device according to the first embodiment of this disclosure in a first state. Figure 39 In 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 one inflection point P, the image-side surface of the second lens E2 and the object-side surface of the fourth lens E4 each have two inflection points P, and the object-side surface of the second lens E2, the object-side surface of the third lens E3 and the image-side surface of the third lens E3 each have three inflection points P. Figure 39 The illustration of the first embodiment disclosed herein is provided as an example. However, in other embodiments of this disclosure, each lens may have one or more inversion points. The number of inversion points is calculated only within the region of the maximum effective optical diameter of each lens. The maximum effective optical diameter range of each lens may be the region traversed by the optical path tracing line of the imaging optical lens in the first state.

[0152] In an imaging optical lens, at least one surface of at least one lens may have at least one critical point off-axis. Specifically, in an imaging optical lens, one or more lenses may each have at least one critical point off-axis on at least one surface, and the statement that at least one surface of a single lens has at least one critical point off-axis means that at least one of the object-side surface and the image-side surface of this single lens has at least one critical point off-axis. This allows adjustment of the angle of incidence of light at the imaging plane, control of peripheral light angles, prevention of vignetting at the image periphery, and reduction of distortion. Please refer to... Figure 39 This is a schematic diagram illustrating the critical point C on the lens surface of the image-capturing device according to the first embodiment of this disclosure in a first state. Figure 39 In the image, the object-side surface of the second lens E2, the image-side surface of the second lens E2, the image-side surface of the third lens E3, the image-side surface of the fourth lens E4, and the image-side surface of the fifth lens E5 each have a critical point C at the off-axis, and the object-side surface of the fourth lens E4 has two critical points C at the off-axis. Figure 39 The illustration of the first embodiment of this disclosure is provided as an example. However, in other embodiments of this disclosure, each lens may have one or more critical points off-axis. The number of critical points is calculated only within the region of the maximum effective optical diameter of each lens.

[0153] 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 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, and the following conditions can be satisfied: 2.00 < BLL / TDL < 5.50. Thus, an appropriate back focal length can be adjusted to facilitate the folding of the optical path. Among them, the following conditions can also be satisfied: 2.30 < BLL / TDL < 4.50. Among them, the following conditions can also be satisfied: 2.50 < BLL / TDL < 4.20. Among them, the following conditions can also be satisfied: 2.67 ≤ BLL / TDL ≤ 3.76.

[0154] The radius of curvature of the object-side surface of the first lens is R1, and the radius of curvature of the object-side surface of the third lens is R5, and the following conditions can be satisfied: -0.50 < (R1 - R5) / (R1 + R5) < 5.00. Thus, the radius of curvature of the object-side surface of the first lens and the radius of curvature of the object-side surface of the third lens can be adjusted to make these two surfaces have a more curved surface shape, which helps to maintain the back focal length and increase the imaging surface at the same time. Among them, the following conditions can also be satisfied: 0.50 < (R1 - R5) / (R1 + R5) < 4.50. Among them, the following conditions can also be satisfied: 1.00 < (R1 - R5) / (R1 + R5) < 4.00. Among them, the following conditions can also be satisfied: 1.36 ≤ (R1 - R5) / (R1 + R5) ≤ 3.46.

[0155] The focal length of the second lens is f2, and the focal length of the third lens is f3, and the following conditions can be satisfied: 0 < |f3 / f2| < 1.00. Thus, the refractive powers of the second lens and the third lens can be balanced, which helps to balance the convergence or divergence of light rays to improve the light-gathering quality of the entire field of view. Among them, the following conditions can also be satisfied: 0 < |f3 / f2| < 0.80. Among them, the following conditions can also be satisfied: 0.01 < |f3 / f2| < 0.60. Among them, the following conditions can also be satisfied: 0.02 ≤ |f3 / f2| ≤ 0.40.

[0156] The refractive index of the first lens is N1, and the following conditions can be satisfied: 1.750 < N1 < 2.200. Thus, the refractive index of the first lens can be adjusted, which helps the first lens to have a stronger ability to converge light rays and at the same time reduce the influence of temperature effects on imaging. Among them, the following conditions can also be satisfied: 1.800 < N1 < 2.100. Among them, the following conditions can also be satisfied: 1.850 < N1 < 2.000. Among them, the following conditions can also be satisfied: 1.883 ≤ N1 ≤ 1.954.

[0157] The Abbe number of the fifth lens is V5, and the refractive index of the fifth lens is N5, which can satisfy the following conditions: 5.00 < V5 / N5 < 15.20. Thereby, the material configuration of the fifth lens can be adjusted, which helps to balance the chromatic aberration correction between light rays of different wavelengths, thereby improving the imaging quality. Among them, the following conditions can also be satisfied: 8.00 < V5 / N5 < 14.80. Among them, the following conditions can also be satisfied: 10.91 ≤ V5 / N5 ≤ 14.34.

[0158] The thickness of the fifth lens on the optical axis is CT5, and the distance between the fourth lens and the fifth lens on the optical axis when the imaging optical lens is in the first state is T45L, which can satisfy the following conditions: 0.10 < CT5 / T45L < 3.00. 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, thereby avoiding the generation of stray light. Among them, the following conditions can also be satisfied: 0.15 < CT5 / T45L < 2.00. Among them, the following conditions can also be satisfied: 0.20 < CT5 / T45L < 1.20. Among them, the following conditions can also be satisfied: 0.30 ≤ CT5 / T45L ≤ 0.87.

[0159] The aperture value (F-number) of the imaging optical lens in the first state is FnoL, which can satisfy the following conditions: 1.80 < FnoL < 2.50. Thereby, a balance can be achieved between illuminance and depth of field, and the light incident amount can be increased to improve the image quality. Among them, the following conditions can also be satisfied: 2.00 < FnoL < 2.40.

[0160] The distance from the object side surface of the lens closest to the object side to the imaging surface on the optical axis in the first state is TLL, and the focal length of the imaging optical lens in the first state is fL, which can satisfy the following conditions: 1.30 < TLL / fL < 1.70. Thereby, it helps to achieve a balance between the total length and the viewing angle. Among them, the following conditions can also be satisfied: 1.40 < TLL / fL < 1.60.

[0161] 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, and the focal length of the imaging optical lens in the first state is fL, which can satisfy the following conditions: 0.12 < 10×T45L / fL < 1.00. Thereby, the total focal length and the distance between the fourth lens and the fifth lens on the optical axis can be balanced, which helps to maintain the telephoto effect of the long focal length and simplify the complexity of the mechanism design during the moving focusing process. Among them, the following conditions can also be satisfied: 0.18 < 10×T45L / fL < 0.80.

[0162] 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: -3.00 < fL / f3 < -1.00. Thus, with a relatively strong refractive power of the third lens, it helps to balance the convergence or divergence of light, improve the high light-gathering quality for multi-segment object distances during shooting, and maintain the back focal length. Among them, the following conditions can also be satisfied: -2.70 < fL / f3 < -1.20. Among them, the following conditions can also be satisfied: -2.76 ≤ fL / f3 ≤ -1.48.

[0163] The curvature radius of the object side surface of the first lens is R1, and the curvature radius of the image side surface of the second lens is R4, which can satisfy the following conditions: -1.00 < (R1 - R4) / (R1 + R4) < 1.50. Thus, it can effectively balance the curvature radius of the object side surface of the first lens and the curvature radius of the image side surface of the second lens, help 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: -0.50 < (R1 - R4) / (R1 + R4) < 1.00.

[0164] The Abbe number of the fifth lens is V5, which can satisfy the following conditions: 5.0 < V5 < 30.0. Thus, it can adjust the Abbe number of the fifth lens to help correct chromatic aberration. Among them, the following conditions can also be satisfied: 8.0 < V5 < 27.0. Among them, the following conditions can also be satisfied: 15.0 < V5 < 25.0.

[0165] When the imaging optical lens is in the first state, the axial interval distance between the second lens and the third lens is T23L, and the axial thickness of the fourth lens is CT4, which can satisfy the following conditions: 0.65 < T23L / CT4 < 2.50. Thus, it can balance the axial interval distance between the second lens and the third lens and the central thickness of the fourth lens, helping to increase the space utilization efficiency. Among them, the following conditions can also be satisfied: 0.70 < T23L / CT4 < 2.20.

[0166] When the imaging optical lens is in the first state, half of the maximum viewing angle is HFOVL, which can satisfy the following conditions: 8.0 degrees < HFOVL < 20.0 degrees. Thus, it can make the imaging optical lens have an appropriate viewing angle to cooperate with telescopic applications. Among them, the following conditions can also be satisfied: 10.0 degrees < HFOVL < 18.0 degrees. Among them, the following conditions can also be satisfied: 12.0 degrees < HFOVL < 16.5 degrees.

[0167] When the imaging optical lens 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 imaging optical lens is in the first state is Y5R2L, which can satisfy the following conditions: 1.30 < Y1R1L / Y5R2L < 1.80. Thereby, it helps to control the beam size and avoid the situation that the effective diameter of the lens is too large, which may cause light to have difficulty passing through the turning element and affect the imaging of the imaging optical lens. Among them, the following conditions can also be satisfied: 1.35 < Y1R1L / Y5R2L < 1.65. Please refer to Figure 38 , which is a schematic diagram showing the parameters Y1R1L and Y5R2L of the imaging device according to the first embodiment of the present disclosure in the first state.

[0168] When the imaging optical lens is in the first state, the maximum effective radius of the object-side surface of the first lens is Y1R1L, and the maximum imaging height of the imaging optical lens (which can be half of the total diagonal length of the effective sensing area of the electronic photosensitive element) is ImgH, which can satisfy the following conditions: 0.65 < Y1R1L / ImgH < 1.20. Thereby, the effective diameter height on the object side of the first lens and the imaging height can be balanced, and the light traveling direction can be adjusted, which helps to compress the outer diameter of the object-side end of the imaging optical lens and increase the imaging surface. Among them, the following conditions can also be satisfied: 0.72 < Y1R1L / ImgH < 1.00. Please refer to Figure 38 , which is a schematic diagram showing the parameters Y1R1L and ImgH of the imaging device according to the first embodiment of the present disclosure in the first state.

[0169] 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: 0.50 < CT1 / CT2 < 2.20. Thereby, the ratio of the central thickness of the first lens and the central thickness of the second lens can be balanced, and by adjusting the central thickness of the first lens, the first lens can have a stronger light deflection ability. Among them, the following conditions can also be satisfied: 0.80 < CT1 / CT2 < 2.00.

[0170] When the imaging optical lens is in the first state, the focal length is fL, and the radius of curvature of the object-side surface of the third lens is R5, which can satisfy the following conditions: -9.00 < fL / R5 < -2.00. Thereby, the configuration of the total focal length and the radius of curvature of the object-side surface of the third lens can be adjusted, so that the imaging optical lens can still maintain a smaller outer diameter and a proper back focal length when correcting off-axis aberration. Among them, the following conditions can also be satisfied: -7.00 < fL / R5 < -2.30.

[0171] The second lens has an object-side surface radius of curvature of R3 and an image-side surface radius of curvature of R4. The focal length of the imaging lens in the first state is fL, which satisfies the following condition: 0.20 < |R3 / fL| + |R4 / fL| < 2.20. This effectively balances the radius of curvature of the object-side and image-side surfaces of the second lens, and adjusts the direction of peripheral light travel, helping to correct astigmatism and reduce stray light within the imaging lens. It also satisfies the following condition: 0.40 < |R3 / fL| + |R4 / fL| < 2.10.

[0172] The imaging optical lens disclosed in this disclosure may further include an aperture; thereby, the shooting angle of the imaging optical lens can be controlled, and an appropriate amount of light can be ensured in the telescope structure. The aperture may have a major axis direction and a minor axis direction perpendicular to the optical axis and different from each other, and the effective radius of the aperture in the major axis direction is different from the effective radius of the aperture in the minor axis direction; thereby, the shape of the aperture can be adjusted, which helps to reduce stray light. For example, please refer to... Figure 40 and Figure 41 This is a schematic diagram illustrating a non-circular aperture of an imaging optical lens in accordance with an embodiment of this disclosure, wherein... Figure 40 A schematic diagram illustrating the shape configuration of the aperture of an imaging optical lens according to an embodiment of this disclosure is provided. Figure 41 A schematic diagram illustrating the shape configuration of the aperture of an imaging optical lens according to another embodiment of this disclosure is shown. Figure 40 As shown, in some embodiments disclosed herein, the aperture ST is elliptical in shape, having a major axis LX perpendicular to the optical axis OA and a minor axis SY. The directions of the major axis LX and the minor axis SY are opposite, and the effective radius Ra of the aperture ST along the major axis LX is greater than the effective radius Rb of the aperture ST along the minor axis SY. Figure 41 As shown, in some embodiments disclosed herein, the aperture ST has a tangent at its outer diameter, and has a major axis LX and a minor axis SY perpendicular to the optical axis OA. The directions of the major axis LX and the minor axis SY are opposite, and the effective radius Ra of the aperture ST in the direction of the major axis LX is greater than the effective radius Rb of the aperture ST in the direction of the minor axis SY.

[0173] When the imaging optical lens is in the first state, the distance on the optical axis between the aperture and the image-side surface of the lens closest to the image side is SDL. When the imaging optical lens is in the first state, the distance on the optical axis between the object-side surface of the lens closest to the object side and the image-side surface of the lens closest to the image side is TDL, and the following conditions can be satisfied: 0.87 < SDL / TDL < 1.20. Thus, by arranging the aperture position closer to the object-side end, it helps to simultaneously compress the outer diameter of the object-side end of the imaging optical lens and avoid stray light in the peripheral area. Among them, the following conditions can also be satisfied: 0.95 < SDL / TDL < 1.10.

[0174] 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 second lens on the optical axis is CT2, and the following conditions can be satisfied: 0.80 < T34L / CT2 < 2.00. Thus, the center thickness of the second lens and the distance on the optical axis between the third lens and the fourth lens can be balanced, which helps to correct spherical aberration and reduce manufacturing tolerances. Among them, the following conditions can also be satisfied: 1.00 < T34L / CT2 < 1.50.

[0175] 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 second lens on the optical axis to the maximum effective radius position of the object-side surface of the second lens is Sag2R1L, and the thickness of the second lens on the optical axis is CT2, and the following conditions can be satisfied: 0.40 < Sag2R1L / CT2 < 1.20. Thus, the second lens periphery can 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 turning element. Among them, the following conditions can also be satisfied: 0.50 < Sag2R1L / CT2 < 1.00. Please refer to Figure 38 , which is a schematic diagram showing the parameter Sag2R1L of the imaging device according to the first embodiment of the present disclosure in the first state, where the displacement value is positive in the image-side direction and negative in the object-side direction.

[0176] When the imaging optical lens is in the first state, the distance parallel to the optical axis from the maximum effective radius position of the image-side surface of the first lens to the maximum effective radius position of the object-side surface of the second lens is ET12L, and the thickness of the second lens on the optical axis is CT2, and the following conditions can be satisfied: 0.70 < ET12L / CT2 < 1.50. Thus, the peripheral distance between the first lens and the second lens can be balanced, and the deflection angle of light incident on the periphery of the object side of the second lens can be effectively controlled to prevent light divergence. Among them, the following conditions can also be satisfied: 0.75 < ET12L / CT2 < 1.40. Please refer to Figure 38 , which is a schematic diagram showing the parameter ET12L of the imaging device according to the first embodiment of the present disclosure in the first state.

[0177] 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 second lens to the image side surface of the fourth lens when the imaging optical lens is in the first state is Dr3r8L, which can satisfy the following condition: 0.15 < CT1 / Dr3r8L < 0.65. Thereby, the ratio of the central thickness of the first lens in the moving lens group can be controlled, which helps to take into account the process limitations of the first lens, and the volume of the imaging optical lens can be reduced by adjusting the spatial configuration of the remaining lenses in the moving lens group. Among them, the following condition can also be satisfied: 0.20 < CT1 / Dr3r8L < 0.48.

[0178] Each technical feature in the imaging optical lens disclosed in the present disclosure can be combined and configured to achieve the corresponding effects.

[0179] 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 freedom of refractive power configuration of the imaging optical lens can be increased, and the influence of external environmental temperature changes on imaging can be reduced, and the glass lens can be made by techniques such as grinding or molding. If the lens material is plastic, the production cost can be effectively reduced. In addition, a spherical surface (SPH) or an aspherical surface (ASP) can be set on the lens surface. Among them, the spherical lens can reduce the manufacturing difficulty, and if an aspherical surface is set on the lens surface, more control variables can be obtained thereby to 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.

[0180] 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.

[0181] 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 transmittance of the lens to light of a specific wavelength band, thereby reducing stray light and color deviation. For example: the additive can have the function of filtering light in the wavelength band of 600 nm to 800 nm in the system to help reduce excess red light or infrared light; or it can filter light in the wavelength band of 350 nm to 450 nm to reduce excess blue light or ultraviolet light. Therefore, the additive can avoid interference of light in a specific wavelength band on imaging. In addition, the additive can be uniformly mixed in the plastic and made into a lens by injection molding technology. In addition, the additive can also be configured on the coating on the lens surface to provide the above effects.

[0182] In the imaging optical lens disclosed in this 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 of the lens surface; if the lens surface is concave and the position of the concave surface is not defined, it means that the concave surface can be located near the optical axis of the lens surface. If the refractive power, radius of curvature, or focal length of the lens is not defined in its region, it means that the refractive power, radius of curvature, or focal length of the lens can be the refractive power, radius of curvature, or focal length of the lens near the optical axis.

[0183] In the imaging optical lens disclosed herein, the inflection point of the lens surface refers to the boundary point where the curvature of the lens surface changes from positive to negative. The critical point of the lens surface refers to the point of tangency on the tangent line between a plane perpendicular to the optical axis and the lens surface, and the critical point is not located on the optical axis.

[0184] In the imaging optical lens disclosed herein, the imaging surface of the imaging optical lens may be a plane or a curved surface with any curvature, depending on the corresponding electronic photosensitive element, especially a curved surface with a concave surface facing the object side.

[0185] In the imaging optical lens disclosed herein, one or more imaging correction elements (such as planar elements) can be selectively disposed between the lens closest to the imaging plane and the imaging plane in the imaging optical path to achieve the effect of correcting image curvature (such as image warping). The optical properties of the imaging correction element, such as curvature, thickness, refractive index, position, and surface type (convex or concave, spherical or aspherical, diffractive surface, and Fresnel surface, etc.), can be adjusted according to the requirements of the imaging device. Generally, a preferred configuration of the imaging correction element is to place a thin plano-concave element with a concave surface in the object-side direction close to the imaging plane.

[0186] The imaging optical lens disclosed herein may include at least one reflecting element, which may be, for example, a prism or a reflective mirror, but this disclosure is not limited thereto. This allows for more flexible spatial configuration. The surface of the prism or the mirror surface of the reflective mirror may be a plane, spherical, aspherical, or freeform surface, providing greater flexibility in the spatial configuration of the imaging optical lens. When the surface of the prism is, for example, a spherical, aspherical, or freeform surface, the prism may also have refractive power, thereby having the function of converging or diverging light. The reflecting element may be positioned between the object and the imaging surface, which is beneficial for compressing the volume of the imaging optical lens. The light path can be reflected once, twice, or more than three times by a single reflecting element. Furthermore, the reflecting element may have at least one reflecting surface, and the angle between the normal direction of the reflecting surface and the optical axis is not limited to 45 degrees, but may be other angles depending on spatial configuration requirements. The reflecting element can redirect the light path from the optical axis near the object side to the optical axis near the image side. The angle between the optical axis vector near the object side and the optical axis vector near the image side can be any angle, not limited to 0, 90, or 180 degrees. Furthermore, to reduce volume, the length and width of the reflector can be unequal, and the length, width, and height of the prism can also be unequal. The surface shape of the reflecting element (e.g., the surface shape of the prism surface or the reflector surface) can be planar, spherical, aspherical, or freeform, depending on optical design requirements, but this disclosure is not limited to these. The reflecting element can be composed of one or more prisms depending on design requirements. The prism can be made of materials such as glass or plastic, depending on design requirements. Additionally, prisms with light path reversal functions and prisms with light-converging or diverging functions are not counted in the lens described above; that is, the lens of an imaging optical lens does not include prisms with light path reversal functions or prisms with light-converging or diverging functions.

[0187] For further explanation, please refer to Figures 42 to 44 Each of the following diagrams illustrates a configuration of a reflective element in an imaging optical lens according to the present disclosure. Figures 42 to 44 As shown, an imaging optical lens may include, in sequence from the object side to the image side, a reflecting element LF, a lens group LG, a filter element FT, and an imaging plane IMG along the optical path direction.

[0188] exist Figure 42 In this structure, the reflecting element LF is a prism, which sequentially has a first transmitting surface LP1, a reflecting surface RF1, and a second transmitting surface LP2 along the optical path. The optical path travels along the first optical axis OA1, passes through the first transmitting surface LP1, and reaches the reflecting surface RF1. The reflecting surface RF1 redirects the optical path from the first optical axis OA1 to the second optical axis OA2. The optical path then travels along the second optical axis OA2, passes through the second transmitting surface LP2, and then through the lens group LG and the filter element FT to reach the imaging surface IMG. Figure 42As shown, the first penetrating surface LP1 and the second penetrating surface LP2 of the reflective element LF can both be planar.

[0189] exist Figure 43 In the image, the reflecting element LF is a plane mirror with a reflecting surface RF1. The light path travels along the first optical axis OA1 to the reflecting surface RF1, where the reflecting surface RF1 turns the light path from the first optical axis OA1 to the second optical axis OA2. The light path then travels along the second optical axis OA2 through the lens group LG and the filter element FT, and finally reaches the imaging surface IMG.

[0190] exist Figure 44 In this structure, the reflecting element LF is a prism, which sequentially has a first transmitting surface LP1, a reflecting surface RF1, and a second transmitting surface LP2 along the optical path. The optical path travels along the first optical axis OA1, passes through the first transmitting surface LP1, and reaches the reflecting surface RF1. The reflecting surface RF1 redirects the optical path from the first optical axis OA1 to the second optical axis OA2. The optical path then travels along the second optical axis OA2, passes through the second transmitting surface LP2, and then through the lens group LG and the filter element FT to reach the imaging surface IMG. Figure 44 As shown, the first penetrating surface LP1 and the second penetrating surface LP2 of the reflective element LF can both be curved surfaces.

[0191] In addition, please refer to Figure 45 and Figure 46 The diagrams illustrate a possible configuration of the two reflective elements according to this disclosure in an imaging optical lens. For example... Figure 45 and Figure 46 As shown, the imaging optical lens sequentially comprises a first reflecting element LF1, a lens group LG, a filter element FT, a second reflecting element LF2, and an imaging surface IMG along the optical path from the object side to the image side. The optical path travels along the first optical axis OA1 to the first reflecting surface RF1 of the first reflecting element LF1, and the first reflecting surface RF1 deflects the optical path from the first optical axis OA1 to the second optical axis OA2. The optical path travels along the second optical axis OA2 through the lens group LG and the filter element FT. Next, the optical path travels along the second optical axis OA2 to the second reflecting surface RF2 of the second reflecting element LF2, and the second reflecting surface RF2 deflects the optical path from the second optical axis OA2 to the third optical axis OA3. The optical path travels along the third optical axis OA3 to the imaging surface IMG. Figure 45 In this context, both the first reflecting element LF1 and the second reflecting element LF2 can be prisms. Figure 46 In this system, the first reflecting element LF1 and the second reflecting element LF2 can be a prism and a plane mirror, respectively.

[0192] Additionally, please refer to Figures 47 to 50 ,in Figure 47 A schematic diagram illustrating one configuration of a dual-reflection element in an imaging optical lens according to the present disclosure is shown. Figure 48A schematic diagram illustrating one configuration of a three-reflection element in an imaging optical lens according to the present disclosure is shown. Figure 49 A schematic diagram illustrating an arrangement of four reflective elements in an imaging optical lens according to the present disclosure is provided. Figure 50 A schematic diagram illustrating one configuration of five reflective elements in an imaging optical lens according to the present disclosure is shown.

[0193] like Figure 47 As shown, the imaging optical lens may sequentially include a lens group LG, a filter element FT, a reflective element LF, and an imaging surface IMG along the optical path from the object side to the image side. The reflective element LF may be a prism, which sequentially has a first transmission surface LP1, a first reflection surface RF1, a second reflection surface RF2, and a second transmission surface LP2 along the optical path. The optical path passes through the lens group LG, the filter element FT, and the first transmission 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 transmission surface LP2 along the third optical axis OA3 to the imaging surface IMG.

[0194] like Figure 48 As shown, the imaging optical lens may sequentially include a lens group LG, a filter element FT, a reflective element LF, and an imaging surface IMG along the optical path from the object side to the image side. The reflective element LF may be a prism, which sequentially has a first transmission surface LP1, a first reflection surface RF1, a second reflection surface RF2, a third reflection surface RF3, and a second transmission surface LP2 along the optical path. The optical path passes through the lens group LG, the filter element FT, and the first transmission 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 transmission surface LP2 along the fourth optical axis OA4 to the imaging surface IMG. The first transmission surface LP1 and the second reflection surface RF2 may be on the same plane.

[0195] like Figure 49As shown, the imaging optical lens may sequentially include a lens group LG, a reflective element LF, a filter element FT, and an imaging surface IMG along the optical path from the object side to the image side. The reflective element LF may be a prism, which sequentially has a first transmission 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 transmission surface LP2 along the optical path. The optical path passes through the lens group LG and the first transmission 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. The fourth reflection surface RF4 deflects the optical path from the fourth optical axis OA4 to the fifth optical axis OA5. The optical path then passes through the second transmission surface LP2 and the filter element FT along the fifth optical axis OA5 to the imaging surface IMG. The first penetrating surface LP1 and the second reflecting surface RF2 can be the same plane.

[0196] like Figure 50 As shown, the imaging optical lens may sequentially include a lens group LG, a reflecting element LF, a filter element FT, and an imaging surface IMG along the optical path from the object side to the image side. The reflecting element LF may be a prism, which sequentially has a first transmitting 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 transmitting surface LP2 along the optical path. The optical path follows the first optical axis OA1, passes through the lens group LG and the first transmission surface LP1, and arrives at the first reflecting surface RF1. 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. The optical path then follows the sixth optical axis OA6, passes through the second transmission surface LP2 and the filter element FT, and arrives at the imaging surface IMG. The first transmission surface LP1 and the second reflecting surface RF2 can be on the same plane.

[0197] In addition, please refer to Figure 51 and Figure 52 ,in Figure 51 A schematic diagram illustrating an arrangement of a reflective element in an imaging optical lens according to the present disclosure is shown. Figure 52 A schematic diagram illustrating another configuration of a reflective element according to this disclosure in an imaging optical lens is shown. For example... Figure 51 and Figure 52As shown, the imaging optical lens may sequentially include a lens group LG, a reflecting element LF, a filter element FT, and an imaging surface IMG along the optical path from the object side to the image side. The reflecting element LF may be a pentaprism, which sequentially has a first transmitting surface LP1, a first reflecting surface RF1, a second reflecting surface RF2, and a second transmitting surface LP2 along the optical path. The optical path passes along the first optical axis OA1, through the first transmitting surface LP1, to the first reflecting surface RF1. 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 optical path then passes along the third optical axis OA3, through the second transmitting surface LP2, and the filter element FT to the imaging surface IMG. Figure 51 In this context, both the first penetrating surface LP1 and the second penetrating surface LP2 can be planar. Figure 52 In this context, both the first penetrating surface LP1 and the second penetrating surface LP2 can be curved surfaces. Furthermore, as... Figure 51 and Figure 52 As shown, the first optical axis OA1 and the third optical axis OA3 may, for example, intersect each other and be perpendicular.

[0198] Furthermore, to reduce space requirements, the length and width of the reflector can be unequal, and the length, width, and height of the prism can also be unequal. Chamfered edges or grooves can be designed in areas outside the optically effective diameter to reduce weight, decrease size, and accommodate the internal components of electronic devices. Additionally, a light-absorbing coating can be applied to the surface of the grooves to achieve anti-reflection and stray light blocking effects. Please refer to [reference needed]. Figures 60 to 62 ,in Figure 60 A schematic diagram illustrating one embodiment of the reflective element according to the first embodiment of this disclosure is shown. Figure 61 Draw Figure 60 The reflective element has not yet been shown in a three-dimensional diagram with tangential edges and grooves, and Figure 62 Draw Figure 60 A three-dimensional schematic diagram showing a reflective element with tangled edges and grooves. For example... Figure 60 and Figure 61 As shown, the reflective element E6 has a non-optically effective path region (NPR), meaning that imaging rays will not pass through the NPR in the reflective element E6. Therefore, in the design, it can be... Figure 60 and Figure 61 Partial removal of the non-optically effective diameter region NPR of the reflective element E6 results in the formation of a tangent edge CP and a groove RP in the reflective element E6 (e.g., Figure 62 (as shown in the image) shape.

[0199] The imaging optical lens disclosed in this disclosure may also be selectively configured with more than three reflective elements; therefore, this disclosure is not limited to the type, number, and position of the reflective elements disclosed in the accompanying drawings.

[0200] The imaging optical lens disclosed herein may be provided with at least one aperture stop, which may be located in front of the first lens, between the lenses, or after the last lens. The aperture stop may be of the type such as a glare stop or a field stop, which can be used to reduce stray light and help improve image quality.

[0201] In the imaging optical lens disclosed in this disclosure, the aperture can be configured as a front aperture or a center aperture. A front aperture means the aperture is positioned between the subject and the first lens, while a center aperture means the aperture is positioned between the first lens and the imaging plane. A front aperture allows for a longer distance between the exit pupil and the imaging plane, resulting in a telecentric effect and increasing the efficiency of image reception by the CCD or CMOS sensor. A center aperture helps to expand the field of view of the imaging optical lens.

[0202] This disclosure may appropriately incorporate a variable aperture element, which can be a mechanical component or a light-regulating element, capable of electrically or signal-controlled aperture size and shape. The mechanical component may include movable parts such as blade assemblies or shielding plates; the light-regulating element may include masking materials such as filter elements, electrochromic materials, or liquid crystal layers. The variable aperture element can enhance image adjustment capabilities by controlling the amount of light entering the image or the exposure time. Furthermore, the variable aperture element can also be the aperture of this disclosure, allowing adjustment of image quality, such as depth of field or exposure speed, by changing the aperture value.

[0203] This disclosure allows for the appropriate placement of one or more optical elements to restrict the form of light passing through an imaging optical lens. These optical elements may be filters, polarizers, etc., but this disclosure is not limited thereto. Furthermore, the optical elements may be monolithic elements, composite components, or thin films, but this disclosure is not limited thereto. The optical elements can be placed between the object end, image end, or lenses of the imaging optical lens to control the passage of specific forms of light, thereby meeting application requirements.

[0204] The imaging optical lens disclosed herein may include at least one optical lens, optical element, or carrier, at least one surface of which has a low-reflection layer, which can effectively reduce stray light generated by light reflection at the interface. The low-reflection layer may be disposed in the ineffective area of ​​the object-side surface or image-side surface of the optical lens, or on the connecting surface between the object-side surface and the image-side surface; the optical element may be a light-shielding element, an annular spacer element, a lens barrel element, a cover glass, blue glass, a filter element (color filter), a light path deflection element (reflective element), a prism, or a mirror, etc.; the carrier may be a lens mount, a microlens disposed on the photosensitive element, the periphery of the photosensitive element substrate, or a glass sheet used to protect the photosensitive element, etc.

[0205] In the imaging optical lens disclosed herein, the object side and image side are determined according to the optical axis direction, and the data on the optical axis are calculated along the optical axis. Furthermore, if the optical axis is turned by a reflective element, the data on the optical axis are also calculated along the optical axis.

[0206] Based on the above implementation methods, specific embodiments are presented below and described in detail with reference to the accompanying drawings.

[0207] <First Embodiment>

[0208] Please refer to Figures 1 to 3 ,in Figure 1 The diagram illustrates the imaging device according to the first embodiment of this disclosure in a first state and a second state. Figure 2 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the first embodiment in its first state. Figure 3 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the first embodiment in its second state. Figure 1 The upper part is a schematic diagram of the imaging optical lens in its first state, while Figure 1 The lower half is a schematic diagram of the imaging optical lens in its second state. Figure 1As can be seen, the imaging device 1 includes an imaging optical lens (not otherwise labeled) and an electronic photosensitive element IS. The imaging optical lens, along the optical path direction from the object side to the image side, sequentially includes an aperture stop S1, a first lens E1, an aperture stop S2, a second lens E2, a third lens E3, a fourth lens E4, an aperture stop S3, a fifth lens E5, an aperture stop S4, a reflective element E6, a filter element E7, and an imaging surface IMG. Furthermore, the imaging optical lens, along the optical path direction from the object side to the image side, has a movable lens group G1 and a final lens group G2, wherein the movable lens group G1 includes an aperture stop S1, a first lens E1, an aperture stop S2, a second lens E2, a third lens E3, a fourth lens E4, and an aperture stop S3, and the final lens group G2 includes a fifth lens E5 and an aperture stop S4. The electronic photosensitive element IS is disposed on the imaging surface IMG. The imaging optical lens comprises five lenses (E1, E2, E3, E4, and E5), with no other interposed lenses between them. Furthermore, there are no other lenses on the optical axis between the final lens group G2 and the reflecting element E6.

[0209] The imaging optical lens adjusts its focal length by changing the distance between two lens groups (G1, G2) during focusing. When the subject is at infinity, the imaging optical lens is positioned as follows: Figure 1 The first state is shown in the upper part. When the subject is at a finite object distance, the imaging optical lens is, for example, in the state shown in the upper part. Figure 1 The second state is shown in the lower half. Specifically, when the subject moves from an infinity object distance to a finite object distance, the imaging optical lens performs a focusing process to transition from the first state to the second state. Conversely, when the subject moves from a finite object distance to infinity, the imaging optical lens also performs a focusing process to transition from the second state to the first state. The first state refers to the state of the imaging optical lens when the subject is at infinity; the second state refers to the state of the imaging optical lens when the subject is at a finite object distance. Figure 1 It can be seen that the moving lens group G1 moves relative to the final lens group G2 along the optical axis during the focusing process. Specifically, during the focusing process when the imaging optical lens changes from the first state to the second state, the moving lens group G1 moves relative to the final lens group G2 towards the object side along the optical axis. It should be noted that the elements in the moving lens group G1 (e.g., lenses, aperture stops, and / or diaphragms) do not move relative to each other during the focusing process, and the elements in the final lens group G2 (e.g., lenses, aperture stops, and / or diaphragms) do not move relative to each other during the focusing process. Furthermore, during the focusing process, the final lens group G2 does not move relative to the reflecting element E6.

[0210] The first lens E1 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are spherical.

[0211] 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 of its surfaces are aspherical. Its object-side surface has three inflection points, and its image-side surface has two inflection points. Its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0212] The third lens E3 has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical. Its object-side surface has three inflection points, its image-side surface has three inflection points, and its image-side surface has a critical point off-axis.

[0213] The fourth lens E4 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical. Its object-side surface has two inflection points, and its image-side surface has one inflection point. Its object-side surface has two critical points off-axis, and its image-side surface has one critical point off-axis.

[0214] The fifth lens E5 has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical. Its object-side surface has a point of inflection, its image-side surface has a point of inflection, and its image-side surface has a critical point off-axis.

[0215] The reflective element E6 is made of glass and is positioned along the optical axis between the fifth lens E5 and the imaging plane IMG, without affecting the focal length of the imaging lens. The reflective element E6 is a prism, which functions as a light path deflector. For ease of explanation, Figure 1 The effect of reflective element E6 on the optical path is not shown. However, reflective element E6 can have various forms depending on the actual design requirements, thus causing different effects on the optical path. For example, please refer to... Figures 53 to 58 This is a schematic diagram illustrating the optical path reversal in the first state of the image-capturing device with various different reflective elements according to the first embodiment of this disclosure.

[0216] exist Figures 53 to 55In the image, the reflective element E6 sequentially comprises a first transmitting surface LP1, a first reflecting surface RF1, a second reflecting surface RF2, and a second transmitting surface LP2 along the optical path direction. The first reflecting surface RF1 deflects the light path from the first optical axis OA1 to the second optical axis OA2, and the second reflecting surface RF2 deflects the light path from the second optical axis OA2 to the third optical axis OA3, with the light path reaching the imaging surface IMG along the third optical axis OA3. Figures 53 to 55 In the process, the reflective element E6 deflects the light path twice. Specifically, Figure 53 The first penetrating surface LP1 and the second penetrating surface LP2 are located in the same plane. The angle between the normal direction of the first reflecting surface RF1 and the first optical axis OA1 and the second optical axis OA2 can both be 45.0 degrees. The angle between the normal direction of the second reflecting surface RF2 and the second optical axis OA2 and the third optical axis OA3 can both be 45.0 degrees. This makes the angle between the optical axis vector (first optical axis OA1) at the near object end and the optical axis vector (third optical axis OA3) at the near image end 180 degrees. The optical axis vector at the near object end and the optical axis vector at the near image end can be opposite. Figure 54 The first penetrating surface LP1 and the second penetrating surface LP2 are parallel to each other and not coplanar. The angle between the normal direction of the first reflecting surface RF1 and the first optical axis OA1 and the second optical axis OA2 can both be 42.0 degrees, and the angle between the normal direction of the second reflecting surface RF2 and the second optical axis OA2 and the third optical axis OA3 can both be 48.0 degrees. Thus, the angle between the optical axis vector (first optical axis OA1) at the near object end and the optical axis vector (third optical axis OA3) at the near image end can be 180 degrees, wherein the optical axis vector at the near object end and the optical axis vector at the near image end can be opposite. Figure 55 The first penetrating surface LP1 and the second penetrating surface LP2 are not parallel to each other and are not coplanar. The angle between the normal direction of the first reflecting surface RF1 and the first optical axis OA1 and the second optical axis OA2 can both be 47.0 degrees, and the angle between the normal direction of the second reflecting surface RF2 and the second optical axis OA2 and the third optical axis OA3 can both be 55.6 degrees, so that there is an obtuse angle between the optical axis vector (first optical axis OA1) near the object end and the optical axis vector (third optical axis OA3) near the image end.

[0217] exist Figure 56 and Figure 57 In the image, the reflective element E6 sequentially comprises a first transmitting surface LP1, a first reflecting surface RF1, a second reflecting surface RF2, a third reflecting surface RF3, and a second transmitting surface LP2 along the optical path direction. The first reflecting surface RF1 deflects the light path from the first optical axis OA1 to the second optical axis OA2; the second reflecting surface RF2 deflects the light path from the second optical axis OA2 to the third optical axis OA3; the third reflecting surface RF3 deflects the light path from the third optical axis OA3 to the fourth optical axis OA4; and the light path reaches the imaging surface IMG along the fourth optical axis OA4. Figure 56 and Figure 57In the process, the reflective element E6 deflects the light path three times. Among these, Figure 56 The first penetrating surface LP1, the second reflecting surface RF2, and the second penetrating surface LP2 are all located on the same plane. The angle between the normal direction of the first reflecting surface RF1 and the first optical axis OA1 and the second optical axis OA2 can both be 30.0 degrees. The angle between the normal direction of the second reflecting surface RF2 and the second optical axis OA2 and the third optical axis OA3 can both be 60.0 degrees. The angle between the normal direction of the third reflecting surface RF3 and the third optical axis OA3 and the fourth optical axis OA4 can both be 30.0 degrees. Thus, the angle between the optical axis vector at the near object end (first optical axis OA1) and the optical axis vector at the near image end (fourth optical axis OA4) can be 180 degrees, wherein the optical axis vector at the near object end and the optical axis vector at the near image end can be opposite. Figure 57 The first penetrating surface LP1 and the second reflecting surface RF2 are not parallel to each other and are not coplanar. The angle between the normal direction of the first reflecting surface RF1 and the first optical axis OA1 and the second optical axis OA2 can both be 40.0 degrees. The angle between the normal direction of the second reflecting surface RF2 and the second optical axis OA2 and the third optical axis OA3 can both be 55.0 degrees. The angle between the normal direction of the third reflecting surface RF3 and the third optical axis OA3 and the fourth optical axis OA4 can both be 27.5 degrees. This results in an obtuse angle between the optical axis vector (first optical axis OA1) near the object end and the optical axis vector (fourth optical axis OA4) near the image end.

[0218] exist Figure 58 In the image, the reflective element E6 sequentially comprises a first penetrating 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 penetrating surface LP2 along the optical path direction. The first reflecting surface RF1 deflects the light path from the first optical axis OA1 to the second optical axis OA2; the second reflecting surface RF2 deflects the light path from the second optical axis OA2 to the third optical axis OA3; the third reflecting surface RF3 deflects the light path from the third optical axis OA3 to the fourth optical axis OA4; and the fourth reflecting surface RF4 deflects the light path from the fourth optical axis OA4 to the fifth optical axis OA5, with the light path reaching the imaging surface IMG along the fifth optical axis OA5. Figure 58In the process, the reflective element E6 bends the optical path four times. The angle between the normal direction of the first reflective surface RF1 and the first optical axis OA1 and the second optical axis OA2 can both be 28.0 degrees. The angle between the normal direction of the second reflective surface RF2 and the second optical axis OA2 and the third optical axis OA3 can both be 56.0 degrees. The angle between the normal direction of the third reflective surface RF3 and the third optical axis OA3 and the fourth optical axis OA4 can both be 56.0 degrees. The angle between the normal direction of the fourth reflective surface RF4 and the fourth optical axis OA4 and the fifth optical axis OA5 can both be 28.0 degrees. This makes the angle between the optical axis vector at the near-object end (first optical axis OA1) and the optical axis vector at the near-image end (fifth optical axis OA5) 0 degrees. The optical axis vector at the near-object end and the optical axis vector at the near-image end can be in the same direction.

[0219] Furthermore, the reflective element E6 in this embodiment may also have, for example, a similar Figure 50 The structure allows the optical path to bend five times, as can be seen in the aforementioned corresponding... Figure 50 The explanation will not be repeated here.

[0220] The filter element E7 is made of plastic and is located between the reflective element E6 and the imaging surface IMG. It does not affect the focal length of the optical lens used for imaging.

[0221] The equations for the aspherical surfaces of the above lenses are expressed as follows:

[0222]

[0223] X: The displacement parallel to the optical axis from the intersection of the aspherical surface and the optical axis to a point on the aspherical surface at a distance Y from the optical axis;

[0224] Y: The perpendicular distance between a point on the aspherical curve and the optical axis;

[0225] R: Radius of curvature;

[0226] k: cone coefficient; and

[0227] Ai: The i-th order aspherical coefficient.

[0228] 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.

[0229] The object distance is the distance on the optical axis between the subject and the object-side surface of the lens closest to the object side in the imaging optical lens (i.e., the object-side surface of the first lens E1). In this embodiment, the imaging optical lens is in the second state with the subject located at a finite object distance of 114.281 mm, but this disclosure is not limited to this.

[0230] 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 angle of view of the imaging optical lens in the first state is HFOVL, with the following values: fL = 13.72 mm, FnoL = 2.26, HFOVL = 14.5 degrees (deg.).

[0231] 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 angle of view of the imaging optical lens in the second state is HFOVS. The values ​​are as follows: fS = 12.91 mm, FnoS = 2.51, HFOVS = 13.0 degrees.

[0232] The distance on the optical axis between the subject and the aperture stop S1 is D0, and the distance on the optical axis between the image-side surface of the moving lens group G1 and the object-side surface of the last lens group G2 is D1. In this embodiment, D1 is the distance on the optical axis between the aperture stop S3 and the object-side surface of the fifth lens E5. When the imaging optical lens is in the first state and the second state through the focusing process, the values ​​of 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 = 0.984 mm. When the imaging optical lens is in the second state, it satisfies the following conditions: object distance = 114.281 mm; D0 = 114.251 mm; and D1 = 1.733 mm.

[0233] The maximum field of view of the imaging optical lens in the first state is FOVL, which satisfies the following condition: FOVL = 29.0 degrees.

[0234] The maximum angle of view of the imaging optical lens in the second state is FOVS, which satisfies the following condition: FOVS = 26.0 degrees.

[0235] In the second state, the distance from the object-side surface of the lens closest to the object side of the imaging optical lens to the imaging plane IMG along the optical axis is TLS. In the first state, the distance from the object-side surface of the lens closest to the object side of the imaging optical lens to the imaging plane IMG along the optical axis is TLL, which satisfies the following condition: TLS / TLL = 1.039. In this embodiment, TLS is the distance from the object-side surface of the first lens E1 to the imaging plane IMG along the optical axis in the second state, and TLL is the distance from the object-side surface of the first lens E1 to the imaging plane IMG along the optical axis in the first state.

[0236] The focal length of the imaging optical lens in the first state is fL, and the focal length of the moving lens group G1 is fG1, which satisfies the following condition: fL / fG1=1.51.

[0237] In the second state of the imaging optical lens, 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. In the first state of the imaging optical lens, 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, which satisfies the following condition: |TDS-TDL|=0.75 mm. In this embodiment, TDS is the distance on the optical axis from the object-side surface of the first lens E1 to the image-side surface of the fifth lens E5 in the second state of the imaging optical lens, and TDL is the distance on the optical axis from the object-side surface of the first lens E1 to the image-side surface of the fifth lens E5 in the first state of the imaging optical lens.

[0238] In the second state, the distance on the optical axis between the object-side surface of the lens closest to the object side and the image-side surface of the lens closest to the image side is TDS. In the first state, the distance on the optical axis between the object-side surface of the lens closest to the object side and the image-side surface of the lens closest to the image side is TDL. The following condition is satisfied: 10×|TDS-TDL| / TDL=1.60.

[0239] The distance on the optical axis from the object-side surface of the lens closest to the object side in the moving lens group G1 to the image-side surface of the lens closest to the image side in the moving lens group G1 is DG1. Similarly, the distance on the optical axis from the object-side surface of the lens closest to the object side in the final lens group G2 to the image-side surface of the lens closest to the image side in the final lens group G2 is DG2. This distance satisfies the condition that DG2 / DG1 = 0.14. In this embodiment, DG1 is the distance on the optical axis from the object-side surface of the first lens E1 to the image-side surface of the fourth lens E4, and DG2 is the distance on the optical axis from the object-side surface of the fifth lens E5 to the image-side surface of the fifth lens E5.

[0240] In the first state, the distance from the object-side surface of the lens closest to the object side of the imaging optical lens to the imaging plane IMG on the optical axis is TLL, and the focal length of the imaging optical lens in the first state is fL, which satisfies the following condition: TLL / fL=1.42.

[0241] In the first state of the imaging optical lens, the distance on the optical axis from the image-side surface of the lens closest to the image side to the imaging plane IMG is BLL, and 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, which satisfies the following condition: BLL / TDL = 3.14. In this embodiment, BLL is the distance on the optical axis from the image-side surface of the fifth lens E5 to the imaging plane IMG in the first state of the imaging optical lens.

[0242] In the first state, the distance from the aperture to the image-side surface of the lens closest to the image side of the imaging optical lens on the optical axis is SDL. 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 of the imaging optical lens on the optical axis is TDL, which satisfies the following condition: SDL / TDL = 1.01. In this embodiment, SDL is the distance from the aperture to the image-side surface of the fifth lens E5 on the optical axis in the first state.

[0243] The focal length of the imaging optical lens in the first state is fL, and the focal length of the third lens E3 is f3, which satisfies the following condition: fL / f3=-1.48.

[0244] In the first state, the optical lens for imaging has a distance of T34L between the third lens E3 and the fourth lens E4 on the optical axis, and a thickness of CT2 on the optical axis for the second lens E2, which satisfies the following condition: T34L / CT2 = 0.48. In this embodiment, the distance between two adjacent lenses on the optical axis refers to the distance between two adjacent mirror surfaces of the two adjacent lenses on the optical axis.

[0245] The focal length of the imaging optical lens in the first state is fL, and the radius of curvature of the object-side surface of the third lens E3 is R5, which satisfies the following condition: fL / R5=-5.94.

[0246] The focal length of the second lens E2 is f2, and the focal length of the third lens E3 is f3, which satisfies the following condition: |f3 / f2|=0.06.

[0247] The radius of curvature of the object-side surface of the second lens E2 is R3, the radius of curvature of the image-side surface of the second lens E2 is R4, and the focal length of the imaging optical lens in the first state is fL, which satisfies the following condition: |R3 / fL|+|R4 / fL|=0.85.

[0248] The radius of curvature of the object-side surface of the first lens E1 is R1, and the radius of curvature of the image-side surface of the second lens E2 is R4, which satisfies the following condition: (R1-R4) / (R1+R4)=0.10.

[0249] The radius of curvature of the object-side surface of the first lens E1 is R1, and the radius of curvature of the object-side surface of the third lens E3 is R5, which satisfies the following condition: (R1-R5) / (R1+R5)=2.04.

[0250] The thickness of the first lens E1 along the optical axis is CT1, and the thickness of the second lens E2 along the optical axis is CT2, which satisfies the following condition: CT1 / CT2 = 2.87.

[0251] The thickness of the first lens E1 on the optical axis is CT1. When the imaging optical lens is in the first state, the distance on the optical axis from the object-side surface of the second lens E2 to the image-side surface of the fourth lens E4 is Dr3r8L, which satisfies the following condition: CT1 / Dr3r8L=0.53.

[0252] In the first state, the optical lens used for imaging has a distance of T23L between the second lens E2 and the third lens E3 on the optical axis, and a thickness of CT4 on the optical axis for the fourth lens E4, which satisfies the following condition: T23L / CT4=1.99.

[0253] When the imaging optical lens is in the first state, the distance between the fourth lens E4 and the fifth lens E5 on the optical axis is T45L, and the focal length of the imaging optical lens in the first state is fL, which satisfies the following condition: 10×T45L / fL=0.56.

[0254] The thickness of the fifth lens E5 on the optical axis is CT5. When the imaging optical lens is in the first state, the distance between the fourth lens E4 and the fifth lens E5 on the optical axis is T45L, which satisfies the following condition: CT5 / T45L=0.62.

[0255] The refractive index of the first lens E1 is N1, which satisfies the following condition: N1 = 1.883.

[0256] The Abbe number of the fifth lens E5 is V5, which satisfies the following condition: V5 = 19.5.

[0257] The Abbe number of the fifth lens E5 is V5, and the refractive index of the fifth lens E5 is N5, which satisfies the following condition: V5 / N5 = 11.68.

[0258] In the first state, the distance between the maximum effective radius of the image-side surface of the first lens E1 and the maximum effective radius of the object-side surface of the second lens E2, parallel to the optical axis, is ET12L. The thickness of the second lens E2 on the optical axis is CT2, which satisfies the following condition: ET12L / CT2=0.93.

[0259] In the first state, the displacement parallel to the optical axis from the intersection of the object-side surface of the second lens E2 with the optical axis to the position of the maximum effective radius of the object-side surface of the second lens E2 is Sag2R1L. The thickness of the second lens E2 on the optical axis is CT2, which satisfies the following condition: Sag2R1L / CT2 = 0.44. In this embodiment, the direction of Sag2R1L points towards the image side, therefore the value is positive.

[0260] 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 satisfies the following condition: Y1R1L / Y5R2L=1.47.

[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 imaging height of the imaging optical lens is ImgH, which satisfies the following condition: Y1R1L / ImgH=0.84.

[0262] Please refer to Tables 1A to 1C below.

[0263]

[0264]

[0265] Table 1A is... Figure 1 The first embodiment provides detailed structural data, in which the units of radius of curvature, thickness, and focal length are millimeters (mm), and surfaces 0 to 19 sequentially represent the surfaces from the object side to the image side along the optical path direction.

[0266]

[0267] Table 1B contains parameters for the imaging optical lens in the first and second states under different focusing conditions. It should be understood that this embodiment only discloses the above two moving focus states, but this disclosure is not limited to the states disclosed above, and the imaging optical lens in this embodiment may have other moving focus states with different focal lengths between the first and second states in addition to the first and second states, so as to correspond to other focusing states with different object distances.

[0268] As shown in Table 1B, the imaging optical lens performs a focusing process based on changes in object distance. During the focusing process as the imaging optical lens transitions from the first state to the second state, the moving lens group G1 moves relative to the final lens group G2 along the optical axis toward the object side. Specifically, when the object distance changes from infinity to 114.281 mm, the imaging optical lens transitions from the first state to the second state. The distance D1 between the moving lens group G1 and the final lens group G2 along the optical axis increases from 0.984 mm in the first state to 1.733 mm in the second state. However, the final lens group G2 does not move relative to the reflecting element E6 during the focusing process. In other words, as the object distance decreases, the moving lens group G1 moves relative to the final lens group G2 along the optical axis toward the object side during the focusing process.

[0269]

[0270] Table 1C shows the aspherical data in the first embodiment, where k is the conic coefficient in the aspherical curve equation, and A4 to A30 represent the 4th to 30th order aspherical coefficients of each surface. Furthermore, the tables in the following embodiments are schematic diagrams and aberration curves corresponding to each embodiment. The definitions of the data in the tables are the same as those in Tables 1A to 1C of the first embodiment, and will not be repeated here.

[0271] <Second Embodiment>

[0272] Please refer to Figures 4 to 6 ,in Figure 4 The diagram illustrates the imaging device according to the second embodiment of this disclosure in a first state and a second state. Figure 5 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the second embodiment in its first state. Figure 6 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the second embodiment in its second state. Figure 4 The upper part is a schematic diagram of the imaging optical lens in its first state, while Figure 4 The lower half is a schematic diagram of the imaging optical lens in its second state. Figure 4 As can be seen, the imaging device 2 includes an imaging optical lens (not otherwise labeled) and an electronic photosensitive element IS. The imaging optical lens, along the optical path direction from the object side to the image side, sequentially includes an aperture stop S1, a first lens E1, an aperture stop S2, a second lens E2, a third lens E3, a fourth lens E4, an aperture stop S3, a fifth lens E5, an aperture stop S4, a reflective element E6, a filter element E7, and an imaging surface IMG. Furthermore, the imaging optical lens, along the optical path direction from the object side to the image side, has a movable lens group G1 and a final lens group G2, wherein the movable lens group G1 includes an aperture stop S1, a first lens E1, an aperture stop S2, a second lens E2, a third lens E3, a fourth lens E4, and an aperture stop S3, and the final lens group G2 includes a fifth lens E5 and an aperture stop S4. The electronic photosensitive element IS is disposed on the imaging surface IMG. The imaging optical lens comprises five lenses (E1, E2, E3, E4, and E5), with no other interposed lenses between them. Furthermore, there are no other lenses on the optical axis between the final lens group G2 and the reflecting element E6.

[0273] The imaging optical lens adjusts its focal length by changing the distance between two lens groups (G1, G2) during focusing. When the subject is at infinity, the imaging optical lens is positioned as follows: Figure 4 The first state is shown in the upper part. When the subject is at a finite object distance, the imaging optical lens is, for example, in the state shown in the upper part. Figure 4The second state is shown in the lower half. Specifically, when the subject moves from an infinity object distance to a finite object distance, the imaging optical lens performs a focusing process to transition from the first state to the second state. Conversely, when the subject moves from a finite object distance to infinity, the imaging optical lens also performs a focusing process to transition from the second state to the first state. The first state refers to the state of the imaging optical lens when the subject is at infinity; the second state refers to the state of the imaging optical lens when the subject is at a finite object distance. Figure 4 It can be seen that the moving lens group G1 moves relative to the final lens group G2 along the optical axis during the focusing process. Specifically, during the focusing process when the imaging optical lens changes from the first state to the second state, the moving lens group G1 moves relative to the final lens group G2 towards the object side along the optical axis. It should be noted that the elements in the moving lens group G1 (e.g., lenses, aperture stops, and / or diaphragms) do not move relative to each other during the focusing process, and the elements in the final lens group G2 (e.g., lenses, aperture stops, and / or diaphragms) do not move relative to each other during the focusing process. Furthermore, during the focusing process, the final lens group G2 does not move relative to the reflecting element E6.

[0274] The first lens E1 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical, and its image-side surface has a point of inflection.

[0275] 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. Its object-side surface has one inflection point, its image-side surface has two inflection points, and its object-side surface has a critical point off-axis.

[0276] The third lens E3 has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical. Its object-side surface has a point of inflection, its image-side surface has a point of inflection, its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0277] The fourth lens E4 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical. Its object-side surface has two inflection points, its image-side surface has one inflection point, and its object-side surface has two critical points off-axis.

[0278] The fifth lens E5 has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical. Its object-side surface has a point of inflection, its image-side surface has a point of inflection, its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0279] The reflective element E6 is made of glass and is positioned along the optical axis between the fifth lens E5 and the imaging plane IMG, without affecting the focal length of the imaging lens. The reflective element E6 is a prism, which functions as a light path deflector. For ease of explanation, Figure 4 The bending effect of the reflective element E6 on the optical path is not shown. However, the reflective element E6 can have various forms depending on the actual design requirements, thus causing different bending effects on the optical path. In this embodiment, the reflective element E6 can, for example, have similar... Figures 53 to 58 The structure can be referred to the aforementioned corresponding structure. Figures 53 to 58 The explanation will not be repeated here. Furthermore, the reflective element E6 in this embodiment may also have, for example, a similar Figure 50 The structure allows the optical path to bend five times, as can be seen in the aforementioned corresponding... Figure 50 The explanation will not be repeated here.

[0280] The filter element E7 is made of plastic and is located between the reflective element E6 and the imaging surface IMG. It does not affect the focal length of the optical lens used for imaging.

[0281] Please refer to Tables 2A to 2D below.

[0282]

[0283] In this embodiment, the imaging optical lens is in the second state with the subject located at a finite object distance of 119.180 mm as an example, but this disclosure is not limited to this.

[0284]

[0285]

[0286] The definitions described in Table 2B are the same as those in the first embodiment. It should be understood that this embodiment only discloses the above two moving focus states, but this disclosure is not limited to the states disclosed above, 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 in addition to the first state and the second state, so as to correspond to other focusing states with different object distances.

[0287] As shown in Table 2B, the imaging optical lens performs a focusing process based on changes in object distance. During the focusing process as the imaging optical lens transitions from its first state to its second state, the moving lens group G1 moves relative to the final lens group G2 along the optical axis toward the object side. Specifically, when the object distance changes from infinity to 119.180 mm, the imaging optical lens transitions from its first state to its second state. The distance D1 between the moving lens group G1 and the final lens group G2 along the optical axis increases from 1.048 mm in the first state to 1.898 mm in the second state. However, the final lens group G2 does not move relative to the reflecting element E6 during the focusing process. In other words, as the object distance decreases, the moving lens group G1 moves relative to the final lens group G2 along the optical axis toward the object side during the focusing process.

[0288]

[0289]

[0290]

[0291] In the second embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in Table 2D below are the same as in the first embodiment and will not be repeated here.

[0292]

[0293] <Third Embodiment>

[0294] Please refer to Figures 7 to 9 ,in Figure 7 The diagram illustrates the imaging device according to the third embodiment of this disclosure in a first state and a second state. Figure 8 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the third embodiment in its first state. Figure 9 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the third embodiment in its second state. Figure 7 The upper part is a schematic diagram of the imaging optical lens in its first state, while Figure 7 The lower half is a schematic diagram of the imaging optical lens in its second state. Figure 7As can be seen, the imaging device 3 includes an imaging optical lens (unlabeled) and an electronic photosensitive element IS. The imaging optical lens, along the optical path direction from the object side to the image side, sequentially includes an aperture stop S1, a first lens E1, an aperture stop S2, a second lens E2, a third lens E3, a fourth lens E4, an aperture stop S3, a fifth lens E5, an aperture stop S4, a reflective element E6, a filter element E7, and an imaging surface IMG. Furthermore, the imaging optical lens, along the optical path direction from the object side to the image side, has a movable lens group G1 and a final lens group G2, wherein the movable lens group G1 includes an aperture stop S1, a first lens E1, an aperture stop S2, a second lens E2, a third lens E3, a fourth lens E4, and an aperture stop S3, and the final lens group G2 includes a fifth lens E5 and an aperture stop S4. The electronic photosensitive element IS is disposed on the imaging surface IMG. The imaging optical lens comprises five lenses (E1, E2, E3, E4, and E5), with no other interposed lenses between them. Furthermore, there are no other lenses on the optical axis between the final lens group G2 and the reflecting element E6.

[0295] The imaging optical lens adjusts its focal length by changing the distance between two lens groups (G1, G2) during focusing. When the subject is at infinity, the imaging optical lens is positioned as follows: Figure 7 The first state is shown in the upper part. When the subject is at a finite object distance, the imaging optical lens is, for example, in the state shown in the upper part. Figure 7 The second state is shown in the lower half. Specifically, when the subject moves from an infinity object distance to a finite object distance, the imaging optical lens performs a focusing process to transition from the first state to the second state. Conversely, when the subject moves from a finite object distance to infinity, the imaging optical lens also performs a focusing process to transition from the second state to the first state. The first state refers to the state of the imaging optical lens when the subject is at infinity; the second state refers to the state of the imaging optical lens when the subject is at a finite object distance. Figure 7 It can be seen that the moving lens group G1 moves relative to the final lens group G2 along the optical axis during the focusing process. Specifically, during the focusing process when the imaging optical lens changes from the first state to the second state, the moving lens group G1 moves relative to the final lens group G2 towards the object side along the optical axis. It should be noted that the elements in the moving lens group G1 (e.g., lenses, aperture stops, and / or diaphragms) do not move relative to each other during the focusing process, and the elements in the final lens group G2 (e.g., lenses, aperture stops, and / or diaphragms) do not move relative to each other during the focusing process. Furthermore, during the focusing process, the final lens group G2 does not move relative to the reflecting element E6.

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

[0297] 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. Its object-side surface has one inflection point, and its image-side surface has two inflection points.

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

[0299] The fourth lens E4 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical. Its object-side surface has five inflection points, its image-side surface has one inflection point, and its object-side surface has a critical point off-axis.

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

[0301] The reflective element E6 is made of glass and is positioned along the optical axis between the fifth lens E5 and the imaging plane IMG, without affecting the focal length of the imaging lens. The reflective element E6 is a prism, which functions as a light path deflector. For ease of explanation, Figure 7 The bending effect of the reflective element E6 on the optical path is not shown. However, the reflective element E6 can have various forms depending on the actual design requirements, thus causing different bending effects on the optical path. In this embodiment, the reflective element E6 can, for example, have similar... Figures 53 to 58 The structure can be referred to the aforementioned corresponding structure. Figures 53 to 58 The explanation will not be repeated here. Furthermore, the reflective element E6 in this embodiment may also have, for example, a similar Figure 50 The structure allows the optical path to bend five times, as can be seen in the aforementioned corresponding... Figure 50 The explanation will not be repeated here.

[0302] The filter element E7 is made of plastic and is located between the reflective element E6 and the imaging surface IMG. It does not affect the focal length of the optical lens used for imaging.

[0303] Please refer to Tables 3A to 3D below.

[0304]

[0305]

[0306] In this embodiment, the imaging optical lens is in the second state with the subject located at a finite object distance of 118.872 mm as an example, but this disclosure is not limited to this.

[0307]

[0308] The definitions described in Table 3B are the same as those in the first embodiment. It should be understood that this embodiment only discloses the above two moving focus states, but this disclosure is not limited to the states disclosed above, 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 in addition to the first state and the second state, so as to correspond to other focusing states with different object distances.

[0309] As shown in Table 3B, the imaging optical lens performs a focusing process based on changes in object distance. During the focusing process as the imaging optical lens transitions from the first state to the second state, the moving lens group G1 moves relative to the final lens group G2 along the optical axis toward the object side. Specifically, when the object distance changes from infinity to 118.872 mm, the imaging optical lens transitions from the first state to the second state. The distance D1 between the moving lens group G1 and the final lens group G2 along the optical axis increases from 0.685 mm in the first state to 1.335 mm in the second state. However, the final lens group G2 does not move relative to the reflecting element E6 during the focusing process. In other words, as the object distance decreases, the moving lens group G1 moves relative to the final lens group G2 along the optical axis toward the object side during the focusing process.

[0310]

[0311]

[0312]

[0313] In the third embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in Table 3D below are the same as in the first embodiment and will not be repeated here.

[0314]

[0315] <Fourth Embodiment>

[0316] Please refer to Figures 10 to 12 ,in Figure 10The diagram illustrates the imaging device according to the fourth embodiment of this disclosure in a first state and a second state. Figure 11 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the fourth embodiment in its first state. Figure 12 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the fourth embodiment in its second state. Figure 10 The upper part is a schematic diagram of the imaging optical lens in its first state, while Figure 10 The lower half is a schematic diagram of the imaging optical lens in its second state. Figure 10 As can be seen, the imaging device 4 includes an imaging optical lens (not otherwise labeled) and an electronic photosensitive element IS. The imaging optical lens, along the optical path direction from the object side to the image side, sequentially includes an aperture stop S1, a first lens E1, an aperture stop S2, a second lens E2, a third lens E3, a fourth lens E4, an aperture stop S3, a fifth lens E5, an aperture stop S4, a reflective element E6, a filter element E7, and an imaging surface IMG. Furthermore, the imaging optical lens, along the optical path direction from the object side to the image side, has a movable lens group G1 and a final lens group G2, wherein the movable lens group G1 includes an aperture stop S1, a first lens E1, an aperture stop S2, a second lens E2, a third lens E3, a fourth lens E4, and an aperture stop S3, and the final lens group G2 includes a fifth lens E5 and an aperture stop S4. The electronic photosensitive element IS is disposed on the imaging surface IMG. The imaging optical lens comprises five lenses (E1, E2, E3, E4, and E5), with no other interposed lenses between them. Furthermore, there are no other lenses on the optical axis between the final lens group G2 and the reflecting element E6.

[0317] The imaging optical lens adjusts its focal length by changing the distance between two lens groups (G1, G2) during focusing. When the subject is at infinity, the imaging optical lens is positioned as follows: Figure 10 The first state is shown in the upper part. When the subject is at a finite object distance, the imaging optical lens is, for example, in the state shown in the upper part. Figure 10 The second state is shown in the lower half. Specifically, when the subject moves from an infinity object distance to a finite object distance, the imaging optical lens performs a focusing process to transition from the first state to the second state. Conversely, when the subject moves from a finite object distance to infinity, the imaging optical lens also performs a focusing process to transition from the second state to the first state. The first state refers to the state of the imaging optical lens when the subject is at infinity; the second state refers to the state of the imaging optical lens when the subject is at a finite object distance. Figure 10It can be seen that the moving lens group G1 moves relative to the final lens group G2 along the optical axis during the focusing process. Specifically, during the focusing process when the imaging optical lens changes from the first state to the second state, the moving lens group G1 moves relative to the final lens group G2 towards the object side along the optical axis. It should be noted that the elements in the moving lens group G1 (e.g., lenses, aperture stops, and / or diaphragms) do not move relative to each other during the focusing process, and the elements in the final lens group G2 (e.g., lenses, aperture stops, and / or diaphragms) do not move relative to each other during the focusing process. Furthermore, during the focusing process, the final lens group G2 does not move relative to the reflecting element E6.

[0318] The first lens E1 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are spherical.

[0319] The second lens E2 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has one inflection point, and its image-side surface has two inflection points. Its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0320] The third lens E3 has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical. Its object-side surface has three inflection points, its image-side surface has three inflection points, and its image-side surface has a critical point off-axis.

[0321] The fourth lens E4 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical. Its object-side surface has two inflection points, and its image-side surface has one inflection point. Its object-side surface has two critical points off-axis, and its image-side surface has one critical point off-axis.

[0322] The fifth lens E5 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical, and its object-side surface has a point of inflection.

[0323] The reflective element E6 is made of glass and is positioned along the optical axis between the fifth lens E5 and the imaging plane IMG, without affecting the focal length of the imaging lens. The reflective element E6 is a prism, which functions as a light path deflector. For ease of explanation, Figure 10The bending effect of the reflective element E6 on the optical path is not shown. However, the reflective element E6 can have various forms depending on the actual design requirements, thus causing different bending effects on the optical path. In this embodiment, the reflective element E6 can, for example, have similar... Figures 53 to 58 The structure can be referred to the aforementioned corresponding structure. Figures 53 to 58 The explanation will not be repeated here. Furthermore, the reflective element E6 in this embodiment may also have, for example, a similar Figure 50 The structure allows the optical path to bend five times, as can be seen in the aforementioned corresponding... Figure 50 The explanation will not be repeated here.

[0324] The filter element E7 is made of plastic and is located between the reflective element E6 and the imaging surface IMG. It does not affect the focal length of the optical lens used for imaging.

[0325] Please refer to Tables 4A to 4D below.

[0326]

[0327]

[0328] In this embodiment, the imaging optical lens is in the second state with the subject located at a finite object distance of 119.299 mm as an example, but this disclosure is not limited to this.

[0329]

[0330] The definitions described in Table 4B are the same as those in the first embodiment. It should be understood that this embodiment only discloses the above two moving focus states, but this disclosure is not limited to the states disclosed above, 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 in addition to the first state and the second state, so as to correspond to other focusing states with different object distances.

[0331] As shown in Table 4B, the imaging optical lens performs a focusing process based on changes in object distance. During the focusing process as the imaging optical lens transitions from its first state to its second state, the moving lens group G1 moves relative to the final lens group G2 along the optical axis toward the object side. Specifically, when the object distance changes from infinity to 119.299 mm, the imaging optical lens transitions from its first state to its second state. The distance D1 between the moving lens group G1 and the final lens group G2 along the optical axis increases from 0.609 mm in the first state to 1.340 mm in the second state. However, the final lens group G2 does not move relative to the reflecting element E6 during the focusing process. In other words, as the object distance decreases, the moving lens group G1 moves relative to the final lens group G2 along the optical axis toward the object side during the focusing process.

[0332]

[0333]

[0334] In the fourth embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in Table 4D below are the same as in the first embodiment and will not be repeated here.

[0335]

[0336] <Fifth Embodiment>

[0337] Please refer to Figures 13 to 15 ,in Figure 13 The diagram illustrates the imaging device according to the fifth embodiment of this disclosure in a first state and a second state. Figure 14 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the fifth embodiment in its first state. Figure 15 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the fifth embodiment in its second state. Figure 13 The upper part is a schematic diagram of the imaging optical lens in its first state, while Figure 13 The lower half is a schematic diagram of the imaging optical lens in its second state. Figure 13 It is known that the imaging device 5 includes an imaging optical lens (not otherwise labeled) and an electronic photosensitive element IS. The imaging optical lens, along the optical path direction from the object side to the image side, sequentially includes an aperture stop S1, a first lens E1, an aperture stop S2, a second lens E2, a third lens E3, a fourth lens E4, an aperture stop S3, a fifth lens E5, an aperture stop S4, a reflective element E6, a filter element E7, and an imaging surface IMG. Furthermore, the imaging optical lens, along the optical path direction from the object side to the image side, has a movable lens group G1 and a final lens group G2, wherein the movable lens group G1 includes an aperture stop S1, a first lens E1, an aperture stop S2, a second lens E2, a third lens E3, a fourth lens E4, and an aperture stop S3, and the final lens group G2 includes a fifth lens E5 and an aperture stop S4. The electronic photosensitive element IS is disposed on the imaging surface IMG. The imaging optical lens comprises five lenses (E1, E2, E3, E4, and E5), with no other interposed lenses between them. Furthermore, there are no other lenses on the optical axis between the final lens group G2 and the reflecting element E6.

[0338] The imaging optical lens adjusts its focal length by changing the distance between two lens groups (G1, G2) during focusing. When the subject is at infinity, the imaging optical lens is positioned as follows: Figure 13The first state is shown in the upper part. When the subject is at a finite object distance, the imaging optical lens is, for example, in the state shown in the upper part. Figure 13 The second state is shown in the lower half. Specifically, when the subject moves from an infinity object distance to a finite object distance, the imaging optical lens performs a focusing process to transition from the first state to the second state. Conversely, when the subject moves from a finite object distance to infinity, the imaging optical lens also performs a focusing process to transition from the second state to the first state. The first state refers to the state of the imaging optical lens when the subject is at infinity; the second state refers to the state of the imaging optical lens when the subject is at a finite object distance. Figure 13 It can be seen that the moving lens group G1 moves relative to the final lens group G2 along the optical axis during the focusing process. Specifically, during the focusing process when the imaging optical lens changes from the first state to the second state, the moving lens group G1 moves relative to the final lens group G2 towards the object side along the optical axis. It should be noted that the elements in the moving lens group G1 (e.g., lenses, aperture stops, and / or diaphragms) do not move relative to each other during the focusing process, and the elements in the final lens group G2 (e.g., lenses, aperture stops, and / or diaphragms) do not move relative to each other during the focusing process. Furthermore, during the focusing process, the final lens group G2 does not move relative to the reflecting element E6.

[0339] The first lens E1 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical, and its image-side surface has a point of inflection.

[0340] 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. Its object-side surface has two inflection points, and its image-side surface has three inflection points.

[0341] The third lens E3 has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical. Its object-side surface has two inflection points, its image-side surface has one inflection point, and its image-side surface has a critical point off-axis.

[0342] The fourth lens E4 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical. Its object-side surface has two inflection points, its image-side surface has one inflection point, and its object-side surface has a critical point off-axis.

[0343] The fifth lens, E5, has positive refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical.

[0344] The reflective element E6 is made of glass and is positioned along the optical axis between the fifth lens E5 and the imaging plane IMG, without affecting the focal length of the imaging lens. The reflective element E6 is a prism, which functions as a light path deflector. For ease of explanation, Figure 13 The bending effect of the reflective element E6 on the optical path is not shown. However, the reflective element E6 can have various forms depending on the actual design requirements, thus causing different bending effects on the optical path. In this embodiment, the reflective element E6 can, for example, have similar... Figures 53 to 58 The structure can be referred to the aforementioned corresponding structure. Figures 53 to 58 The explanation will not be repeated here. Furthermore, the reflective element E6 in this embodiment may also have, for example, a similar Figure 50 The structure allows the optical path to bend five times, as can be seen in the aforementioned corresponding... Figure 50 The explanation will not be repeated here.

[0345] The filter element E7 is made of plastic and is located between the reflective element E6 and the imaging surface IMG. It does not affect the focal length of the optical lens used for imaging.

[0346] Please refer to Tables 5A to 5D below.

[0347]

[0348]

[0349] In this embodiment, the imaging optical lens is in the second state with the subject located at a finite object distance of 118.701 mm as an example, but this disclosure is not limited to this.

[0350]

[0351] The definitions described in Table 5B are the same as those in the first embodiment. It should be understood that this embodiment only discloses the above two moving focus states, but this disclosure is not limited to the states disclosed above, 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 in addition to the first state and the second state, so as to correspond to other focusing states with different object distances.

[0352] As shown in Table 5B, the imaging optical lens performs a focusing process based on changes in object distance. During the focusing process as the imaging optical lens transitions from the first state to the second state, the moving lens group G1 moves relative to the final lens group G2 along the optical axis toward the object side. Specifically, when the object distance changes from infinity to 118.701 mm, the imaging optical lens transitions from the first state to the second state. The distance D1 between the moving lens group G1 and the final lens group G2 along the optical axis increases from 0.766 mm in the first state to 1.966 mm in the second state. However, the final lens group G2 does not move relative to the reflecting element E6 during the focusing process. In other words, as the object distance decreases, the moving lens group G1 moves relative to the final lens group G2 along the optical axis toward the object side during the focusing process.

[0353]

[0354]

[0355] In the fifth embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in Table 5D below are the same as in the first embodiment and will not be repeated here.

[0356]

[0357]

[0358] <Sixth Embodiment>

[0359] Please refer to Figures 16 to 18 ,in Figure 16 The diagram illustrates the imaging device according to the sixth embodiment of this disclosure in a first state and a second state. Figure 17 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the sixth embodiment in its first state. Figure 18 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the sixth embodiment in its second state. Figure 16 The upper part is a schematic diagram of the imaging optical lens in its first state, while Figure 16 The lower half is a schematic diagram of the imaging optical lens in its second state. Figure 16As can be seen, the imaging device 6 includes an imaging optical lens (unlabeled) and an electronic photosensitive element IS. The imaging optical lens, along the optical path direction from the object side to the image side, sequentially includes an aperture stop S1, a first lens E1, an aperture stop S2, a second lens E2, a third lens E3, a fourth lens E4, an aperture stop S3, a fifth lens E5, an aperture stop S4, a reflective element E6, a filter element E7, and an imaging surface IMG. Furthermore, the imaging optical lens, along the optical path direction from the object side to the image side, has a movable lens group G1 and a final lens group G2, wherein the movable lens group G1 includes an aperture stop S1, a first lens E1, an aperture stop S2, a second lens E2, a third lens E3, a fourth lens E4, and an aperture stop S3, and the final lens group G2 includes a fifth lens E5 and an aperture stop S4. The electronic photosensitive element IS is disposed on the imaging surface IMG. The imaging optical lens comprises five lenses (E1, E2, E3, E4, and E5), with no other interposed lenses between them. Furthermore, there are no other lenses on the optical axis between the final lens group G2 and the reflecting element E6.

[0360] The imaging optical lens adjusts its focal length by changing the distance between two lens groups (G1, G2) during focusing. When the subject is at infinity, the imaging optical lens is positioned as follows: Figure 16 The first state is shown in the upper part. When the subject is at a finite object distance, the imaging optical lens is, for example, in the state shown in the upper part. Figure 16 The second state is shown in the lower half. Specifically, when the subject moves from an infinity object distance to a finite object distance, the imaging optical lens performs a focusing process to transition from the first state to the second state. Conversely, when the subject moves from a finite object distance to infinity, the imaging optical lens also performs a focusing process to transition from the second state to the first state. The first state refers to the state of the imaging optical lens when the subject is at infinity; the second state refers to the state of the imaging optical lens when the subject is at a finite object distance. Figure 16 It can be seen that the moving lens group G1 moves relative to the final lens group G2 along the optical axis during the focusing process. Specifically, during the focusing process when the imaging optical lens changes from the first state to the second state, the moving lens group G1 moves relative to the final lens group G2 towards the object side along the optical axis. It should be noted that the elements in the moving lens group G1 (e.g., lenses, aperture stops, and / or diaphragms) do not move relative to each other during the focusing process, and the elements in the final lens group G2 (e.g., lenses, aperture stops, and / or diaphragms) do not move relative to each other during the focusing process. Furthermore, during the focusing process, the final lens group G2 does not move relative to the reflecting element E6.

[0361] The first lens E1 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are spherical.

[0362] The second lens E2 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has a point of inflection, and its image-side surface also has a point of inflection.

[0363] The third lens E3 has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has three inflection points, and its image-side surface has two inflection points.

[0364] The fourth lens E4 has positive refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical. Its object-side surface has three inflection points, its image-side surface has one inflection point, and its object-side surface has a critical point off-axis.

[0365] The fifth lens E5 has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical. Its object-side surface has a point of inflection, its image-side surface has a point of inflection, its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0366] The reflective element E6 is made of glass and is positioned along the optical axis between the fifth lens E5 and the imaging plane IMG, without affecting the focal length of the imaging lens. The reflective element E6 is a prism, which functions as a light path deflector. For ease of explanation, Figure 16 The bending effect of the reflective element E6 on the optical path is not shown. However, the reflective element E6 can have various forms depending on the actual design requirements, thus causing different bending effects on the optical path. In this embodiment, the reflective element E6 can, for example, have similar... Figures 53 to 58 The structure can be referred to the aforementioned corresponding structure. Figures 53 to 58 The explanation will not be repeated here. Furthermore, the reflective element E6 in this embodiment may also have, for example, a similar Figure 50 The structure allows the optical path to bend five times, as can be seen in the aforementioned corresponding... Figure 50 The explanation will not be repeated here.

[0367] The filter element E7 is made of plastic and is located between the reflective element E6 and the imaging surface IMG. It does not affect the focal length of the optical lens used for imaging.

[0368] Please refer to Tables 6A to 6D below.

[0369]

[0370] In this embodiment, the imaging optical lens is in the second state with the subject located at a finite object distance of 119.197 mm as an example, but this disclosure is not limited to this.

[0371]

[0372] The definitions described in Table 6B are the same as those in the first embodiment. It should be understood that this embodiment only discloses the above two moving focus states, but this disclosure is not limited to the states disclosed above, 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 in addition to the first state and the second state, so as to correspond to other focusing states with different object distances.

[0373] As shown in Table 6B, the imaging optical lens performs a focusing process based on changes in object distance. During the focusing process as the imaging optical lens transitions from the first state to the second state, the moving lens group G1 moves relative to the final lens group G2 along the optical axis toward the object side. Specifically, when the object distance changes from infinity to 119.197 mm, the imaging optical lens transitions from the first state to the second state. The distance D1 between the moving lens group G1 and the final lens group G2 along the optical axis increases from 0.602 mm in the first state to 1.405 mm in the second state. However, the final lens group G2 does not move relative to the reflecting element E6 during the focusing process. In other words, as the object distance decreases, the moving lens group G1 moves relative to the final lens group G2 along the optical axis toward the object side during the focusing process.

[0374]

[0375]

[0376] In the sixth embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in Table 6D below are the same as in the first embodiment and will not be repeated here.

[0377]

[0378]

[0379] <Seventh Embodiment>

[0380] Please refer to Figures 19 to 21 ,in Figure 19Schematic diagrams illustrating the imaging device according to the seventh embodiment of this disclosure in a first state and a second state are shown. Figure 20 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the seventh embodiment in its first state. Figure 21 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the seventh embodiment in its second state. Figure 19 The upper part is a schematic diagram of the imaging optical lens in its first state, while Figure 19 The lower half is a schematic diagram of the imaging optical lens in its second state. Figure 19 As can be seen, the imaging device 7 includes an imaging optical lens (not otherwise labeled) and an electronic photosensitive element IS. The imaging optical lens, along the optical path direction from the object side to the image side, sequentially includes an aperture stop S1, a first lens E1, an aperture stop S2, a second lens E2, a third lens E3, a fourth lens E4, an aperture stop S3, a fifth lens E5, an aperture stop S4, a reflective element E6, a filter element E7, and an imaging surface IMG. Furthermore, the imaging optical lens, along the optical path direction from the object side to the image side, has a movable lens group G1 and a final lens group G2, wherein the movable lens group G1 includes an aperture stop S1, a first lens E1, an aperture stop S2, a second lens E2, a third lens E3, a fourth lens E4, and an aperture stop S3, and the final lens group G2 includes a fifth lens E5 and an aperture stop S4. The electronic photosensitive element IS is disposed on the imaging surface IMG. The imaging optical lens comprises five lenses (E1, E2, E3, E4, and E5), with no other interposed lenses between them. Furthermore, there are no other lenses on the optical axis between the final lens group G2 and the reflecting element E6.

[0381] The imaging optical lens adjusts its focal length by changing the distance between two lens groups (G1, G2) during focusing. When the subject is at infinity, the imaging optical lens is positioned as follows: Figure 19 The first state is shown in the upper part. When the subject is at a finite object distance, the imaging optical lens is, for example, in the state shown in the upper part. Figure 19 The second state is shown in the lower half. Specifically, when the subject moves from an infinity object distance to a finite object distance, the imaging optical lens performs a focusing process to transition from the first state to the second state. Conversely, when the subject moves from a finite object distance to infinity, the imaging optical lens also performs a focusing process to transition from the second state to the first state. The first state refers to the state of the imaging optical lens when the subject is at infinity; the second state refers to the state of the imaging optical lens when the subject is at a finite object distance. Figure 19It can be seen that the moving lens group G1 moves relative to the final lens group G2 along the optical axis during the focusing process. Specifically, during the focusing process when the imaging optical lens changes from the first state to the second state, the moving lens group G1 moves relative to the final lens group G2 towards the object side along the optical axis. It should be noted that the elements in the moving lens group G1 (e.g., lenses, aperture stops, and / or diaphragms) do not move relative to each other during the focusing process, and the elements in the final lens group G2 (e.g., lenses, aperture stops, and / or diaphragms) do not move relative to each other during the focusing process. Furthermore, during the focusing process, the final lens group G2 does not move relative to the reflecting element E6.

[0382] 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 of its surfaces are aspherical. Its object-side surface has one inflection point, and its image-side surface has two inflection points.

[0383] The second lens E2 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has one inflection point, its image-side surface has two inflection points, and its image-side surface has a critical point off-axis.

[0384] The third lens E3 has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical. Its object-side surface has a point of inflection, its image-side surface has a point of inflection, its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0385] The fourth lens E4 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both 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 two critical points off-axis, and its image-side surface has one critical point off-axis.

[0386] The fifth lens E5 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical, and its object-side surface has a point of inflection.

[0387] The reflective element E6 is made of glass and is positioned along the optical axis between the fifth lens E5 and the imaging plane IMG, without affecting the focal length of the imaging lens. The reflective element E6 is a prism, which functions as a light path deflector. For ease of explanation, Figure 19The bending effect of the reflective element E6 on the optical path is not shown. However, the reflective element E6 can have various forms depending on the actual design requirements, thus causing different bending effects on the optical path. In this embodiment, the reflective element E6 can, for example, have similar... Figures 53 to 58 The structure can be referred to the aforementioned corresponding structure. Figures 53 to 58 The explanation will not be repeated here. Furthermore, the reflective element E6 in this embodiment may also have, for example, a similar Figure 50 The structure allows the optical path to bend five times, as can be seen in the aforementioned corresponding... Figure 50 The explanation will not be repeated here.

[0388] The filter element E7 is made of plastic and is located between the reflective element E6 and the imaging surface IMG. It does not affect the focal length of the optical lens used for imaging.

[0389] Please refer to Tables 7A to 7D below.

[0390]

[0391]

[0392] In this embodiment, the imaging optical lens is in the second state with the subject located at a finite object distance of 103.052 mm as an example, but this disclosure is not limited to this.

[0393]

[0394] The definitions described in Table 7B are the same as those in the first embodiment. It should be understood that this embodiment only discloses the above two moving focus states, but this disclosure is not limited to the states disclosed above, 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 in addition to the first state and the second state, so as to correspond to other focusing states with different object distances.

[0395] As shown in Table 7B, the imaging optical lens performs a focusing process based on changes in object distance. During the focusing process as the imaging optical lens transitions from the first state to the second state, the moving lens group G1 moves relative to the final lens group G2 along the optical axis toward the object side. Specifically, when the object distance changes from infinity to 103.052 mm, the imaging optical lens transitions from the first state to the second state. The distance D1 between the moving lens group G1 and the final lens group G2 along the optical axis increases from 0.661 mm in the first state to 1.411 mm in the second state. However, the final lens group G2 does not move relative to the reflecting element E6 during the focusing process. In other words, as the object distance decreases, the moving lens group G1 moves relative to the final lens group G2 along the optical axis toward the object side during the focusing process.

[0396]

[0397]

[0398]

[0399] In the seventh embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in Table 7D below are the same as in the first embodiment and will not be repeated here.

[0400]

[0401]

[0402] <Eighth Embodiment>

[0403] Please refer to Figures 22 to 24 ,in Figure 22 Schematic diagrams illustrating the imaging device according to the eighth embodiment of this disclosure in a first state and a second state are shown. Figure 23 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the eighth embodiment in its first state. Figure 24 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the eighth embodiment in its second state. Figure 22 The upper part is a schematic diagram of the imaging optical lens in its first state, while Figure 22 The lower half is a schematic diagram of the imaging optical lens in its second state. Figure 22 It is known that the imaging device 8 includes an imaging optical lens (not otherwise labeled) and an electronic photosensitive element IS. The imaging optical lens, along the optical path direction from the object side to the image side, sequentially includes an aperture stop S1, a first lens E1, an aperture stop S2, a second lens E2, a third lens E3, a fourth lens E4, an aperture stop S3, a fifth lens E5, an aperture stop S4, a reflective element E6, a filter element E7, and an imaging surface IMG. Furthermore, the imaging optical lens, along the optical path direction from the object side to the image side, has a movable lens group G1 and a final lens group G2, wherein the movable lens group G1 includes an aperture stop S1, a first lens E1, an aperture stop S2, a second lens E2, a third lens E3, a fourth lens E4, and an aperture stop S3, and the final lens group G2 includes a fifth lens E5 and an aperture stop S4. The electronic photosensitive element IS is disposed on the imaging surface IMG. The imaging optical lens comprises five lenses (E1, E2, E3, E4, and E5), with no other interposed lenses between them. Furthermore, there are no other lenses on the optical axis between the final lens group G2 and the reflecting element E6.

[0404] The imaging optical lens adjusts its focal length by changing the distance between two lens groups (G1, G2) during focusing. When the subject is at infinity, the imaging optical lens is positioned as follows: Figure 22 The first state is shown in the upper part. When the subject is at a finite object distance, the imaging optical lens is, for example, in the state shown in the upper part. Figure 22 The second state is shown in the lower half. Specifically, when the subject moves from an infinity object distance to a finite object distance, the imaging optical lens performs a focusing process to transition from the first state to the second state. Conversely, when the subject moves from a finite object distance to infinity, the imaging optical lens also performs a focusing process to transition from the second state to the first state. The first state refers to the state of the imaging optical lens when the subject is at infinity; the second state refers to the state of the imaging optical lens when the subject is at a finite object distance. Figure 22 It can be seen that the moving lens group G1 moves relative to the final lens group G2 along the optical axis during the focusing process. Specifically, during the focusing process when the imaging optical lens changes from the first state to the second state, the moving lens group G1 moves relative to the final lens group G2 towards the object side along the optical axis. It should be noted that the elements in the moving lens group G1 (e.g., lenses, aperture stops, and / or diaphragms) do not move relative to each other during the focusing process, and the elements in the final lens group G2 (e.g., lenses, aperture stops, and / or diaphragms) do not move relative to each other during the focusing process. Furthermore, during the focusing process, the final lens group G2 does not move relative to the reflecting element E6.

[0405] The first lens E1 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are spherical.

[0406] The second lens E2 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical. Its object-side surface has one inflection point, its image-side surface has two inflection points, and its image-side surface has a critical point off-axis.

[0407] The third lens E3 has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical. Its object-side surface has three inflection points, its image-side surface has five inflection points, and its image-side surface has a critical point off-axis.

[0408] The fourth lens E4 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical. Its object-side surface has six inflection points, and its image-side surface has one inflection point. Its object-side surface has two critical points off-axis, and its image-side surface has one critical point off-axis.

[0409] The fifth lens, E5, has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical.

[0410] The reflective element E6 is made of glass and is positioned along the optical axis between the fifth lens E5 and the imaging plane IMG, without affecting the focal length of the imaging lens. The reflective element E6 is a prism, which functions as a light path deflector. For ease of explanation, Figure 22 The bending effect of the reflective element E6 on the optical path is not shown. However, the reflective element E6 can have various forms depending on the actual design requirements, thus causing different bending effects on the optical path. In this embodiment, the reflective element E6 can, for example, have similar... Figures 53 to 58 The structure can be referred to the aforementioned corresponding structure. Figures 53 to 58 The explanation will not be repeated here. Furthermore, the reflective element E6 in this embodiment may also have, for example, a similar Figure 50 The structure allows the optical path to bend five times, as can be seen in the aforementioned corresponding... Figure 50 The explanation will not be repeated here.

[0411] The filter element E7 is made of plastic and is located between the reflective element E6 and the imaging surface IMG. It does not affect the focal length of the optical lens used for imaging.

[0412] Please refer to Tables 8A to 8D below.

[0413]

[0414] In this embodiment, the imaging optical lens is in the second state with the subject located at a finite object distance of 119.230 mm as an example, but this disclosure is not limited to this.

[0415]

[0416]

[0417] The definitions described in Table 8B are the same as those in the first embodiment. It should be understood that this embodiment only discloses the above two moving focus states, but this disclosure is not limited to the states disclosed above, 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 in addition to the first state and the second state, so as to correspond to other focusing states with different object distances.

[0418] As shown in Table 8B, the imaging optical lens performs a focusing process based on changes in object distance. During the focusing process as the imaging optical lens transitions from the first state to the second state, the moving lens group G1 moves relative to the final lens group G2 along the optical axis toward the object side. Specifically, when the object distance changes from infinity to 119.230 mm, the imaging optical lens transitions from the first state to the second state. The distance D1 between the moving lens group G1 and the final lens group G2 along the optical axis increases from 0.498 mm in the first state to 1.298 mm in the second state. However, the final lens group G2 does not move relative to the reflecting element E6 during the focusing process. In other words, as the object distance decreases, the moving lens group G1 moves relative to the final lens group G2 along the optical axis toward the object side during the focusing process.

[0419]

[0420]

[0421] In the eighth embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in Table 8D below are the same as in the first embodiment and will not be repeated here.

[0422]

[0423]

[0424] <Ninth Embodiment>

[0425] Please refer to Figures 25 to 27 ,in Figure 25 Schematic diagrams illustrating the imaging device according to the ninth embodiment of this disclosure in a first state and a second state are shown. Figure 26 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the ninth embodiment in its first state. Figure 27 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the ninth embodiment in its second state. Figure 25 The upper part is a schematic diagram of the imaging optical lens in its first state, while Figure 25 The lower half is a schematic diagram of the imaging optical lens in its second state. Figure 25As can be seen, the imaging device 9 includes an imaging optical lens (not otherwise labeled) and an electronic photosensitive element IS. The imaging optical lens, along the optical path direction from the object side to the image side, sequentially includes an aperture stop S1, a first lens E1, an aperture stop S2, a second lens E2, a third lens E3, a fourth lens E4, an aperture stop S3, a fifth lens E5, an aperture stop S4, a reflective element E6, a filter element E7, and an imaging surface IMG. Furthermore, the imaging optical lens, along the optical path direction from the object side to the image side, has a movable lens group G1 and a final lens group G2, wherein the movable lens group G1 includes an aperture stop S1, a first lens E1, an aperture stop S2, a second lens E2, a third lens E3, a fourth lens E4, and an aperture stop S3, and the final lens group G2 includes a fifth lens E5 and an aperture stop S4. The electronic photosensitive element IS is disposed on the imaging surface IMG. The imaging optical lens comprises five lenses (E1, E2, E3, E4, and E5), with no other interposed lenses between them. Furthermore, there are no other lenses on the optical axis between the final lens group G2 and the reflecting element E6.

[0426] The imaging optical lens adjusts its focal length by changing the distance between two lens groups (G1, G2) during focusing. When the subject is at infinity, the imaging optical lens is positioned as follows: Figure 25 The first state is shown in the upper part. When the subject is at a finite object distance, the imaging optical lens is, for example, in the state shown in the upper part. Figure 25 The second state is shown in the lower half. Specifically, when the subject moves from an infinity object distance to a finite object distance, the imaging optical lens performs a focusing process to transition from the first state to the second state. Conversely, when the subject moves from a finite object distance to infinity, the imaging optical lens also performs a focusing process to transition from the second state to the first state. The first state refers to the state of the imaging optical lens when the subject is at infinity; the second state refers to the state of the imaging optical lens when the subject is at a finite object distance. Figure 25 It can be seen that the moving lens group G1 moves relative to the final lens group G2 along the optical axis during the focusing process. Specifically, during the focusing process when the imaging optical lens changes from the first state to the second state, the moving lens group G1 moves relative to the final lens group G2 towards the object side along the optical axis. It should be noted that the elements in the moving lens group G1 (e.g., lenses, aperture stops, and / or diaphragms) do not move relative to each other during the focusing process, and the elements in the final lens group G2 (e.g., lenses, aperture stops, and / or diaphragms) do not move relative to each other during the focusing process. Furthermore, during the focusing process, the final lens group G2 does not move relative to the reflecting element E6.

[0427] The first lens E1 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical. Its image-side surface has a point of inflection and a critical point off-axis.

[0428] The second lens E2 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has two inflection points, and its image-side surface has two inflection points. Its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0429] The third lens E3 has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical. Its object-side surface has one inflection point, and its image-side surface has two inflection points. Its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0430] The fourth lens E4 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical. Its object-side surface has three inflection points, and its image-side surface has one inflection point. Its object-side surface has two critical points off-axis, and its image-side surface has one critical point off-axis.

[0431] The fifth lens E5 has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has a point of inflection and a critical point off-axis.

[0432] The reflective element E6 is made of glass and is positioned along the optical axis between the fifth lens E5 and the imaging plane IMG, without affecting the focal length of the imaging lens. The reflective element E6 is a prism, which functions as a light path deflector. For ease of explanation, Figure 25 The bending effect of the reflective element E6 on the optical path is not shown. However, the reflective element E6 can have various forms depending on the actual design requirements, thus causing different bending effects on the optical path. In this embodiment, the reflective element E6 can, for example, have similar... Figures 53 to 58 The structure can be referred to the aforementioned corresponding structure. Figures 53 to 58 The explanation will not be repeated here. Furthermore, the reflective element E6 in this embodiment may also have, for example, a similar Figure 50 The structure allows the optical path to bend five times, as can be seen in the aforementioned corresponding... Figure 50 The explanation will not be repeated here.

[0433] The filter element E7 is made of plastic and is located between the reflective element E6 and the imaging surface IMG. It does not affect the focal length of the optical lens used for imaging.

[0434] Please refer to Tables 9A to 9D below.

[0435]

[0436] In this embodiment, the imaging optical lens is in the second state with the subject located at a finite object distance of 118.665 mm as an example, but this disclosure is not limited to this.

[0437]

[0438] The definitions described in Table 9B are the same as those in the first embodiment. It should be understood that this embodiment only discloses the above two moving focus states, but this disclosure is not limited to the states disclosed above, 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 in addition to the first state and the second state, so as to correspond to other focusing states with different object distances.

[0439] As shown in Table 9B, the imaging optical lens performs a focusing process based on changes in object distance. During the focusing process as the imaging optical lens transitions from the first state to the second state, the moving lens group G1 moves relative to the final lens group G2 along the optical axis toward the object side. Specifically, when the object distance changes from infinity to 118.665 mm, the imaging optical lens transitions from the first state to the second state. The distance D1 between the moving lens group G1 and the final lens group G2 along the optical axis increases from 0.720 mm in the first state to 1.520 mm in the second state. However, the final lens group G2 does not move relative to the reflecting element E6 during the focusing process. In other words, as the object distance decreases, the moving lens group G1 moves relative to the final lens group G2 along the optical axis toward the object side during the focusing process.

[0440]

[0441]

[0442]

[0443] In the ninth embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in Table 9D below are the same as in the first embodiment and will not be repeated here.

[0444]

[0445]

[0446] <Tenth Embodiment>

[0447] Please refer to Figures 28 to 30 ,in Figure 28 The diagram illustrates the imaging apparatus according to the tenth embodiment of this disclosure in a first state and a second state. Figure 29 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the tenth embodiment in its first state. Figure 30 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the tenth embodiment in its second state. Figure 28 The upper part is a schematic diagram of the imaging optical lens in its first state, while Figure 28 The lower half is a schematic diagram of the imaging optical lens in its second state. Figure 28 As can be seen, the imaging device 10 includes an imaging optical lens (not otherwise labeled) and an electronic photosensitive element IS. The imaging optical lens, along the optical path direction from the object side to the image side, sequentially includes an aperture stop S1, a first lens E1, an aperture stop S2, a second lens E2, a third lens E3, a fourth lens E4, an aperture stop S3, a fifth lens E5, an aperture stop S4, a reflective element E6, a filter element E7, and an imaging surface IMG. Furthermore, the imaging optical lens, along the optical path direction from the object side to the image side, has a movable lens group G1 and a final lens group G2, wherein the movable lens group G1 includes an aperture stop S1, a first lens E1, an aperture stop S2, a second lens E2, a third lens E3, a fourth lens E4, and an aperture stop S3, and the final lens group G2 includes a fifth lens E5 and an aperture stop S4. The electronic photosensitive element IS is disposed on the imaging surface IMG. The imaging optical lens comprises five lenses (E1, E2, E3, E4, and E5), with no other interposed lenses between them. Furthermore, there are no other lenses on the optical axis between the final lens group G2 and the reflecting element E6.

[0448] The imaging optical lens adjusts its focal length by changing the distance between two lens groups (G1, G2) during focusing. When the subject is at infinity, the imaging optical lens is positioned as follows: Figure 28 The first state is shown in the upper part. When the subject is at a finite object distance, the imaging optical lens is, for example, in the state shown in the upper part. Figure 28The second state is shown in the lower half. Specifically, when the subject moves from an infinity object distance to a finite object distance, the imaging optical lens performs a focusing process to transition from the first state to the second state. Conversely, when the subject moves from a finite object distance to infinity, the imaging optical lens also performs a focusing process to transition from the second state to the first state. The first state refers to the state of the imaging optical lens when the subject is at infinity; the second state refers to the state of the imaging optical lens when the subject is at a finite object distance. Figure 28 It can be seen that the moving lens group G1 moves relative to the final lens group G2 along the optical axis during the focusing process. Specifically, during the focusing process when the imaging optical lens changes from the first state to the second state, the moving lens group G1 moves relative to the final lens group G2 towards the object side along the optical axis. It should be noted that the elements in the moving lens group G1 (e.g., lenses, aperture stops, and / or diaphragms) do not move relative to each other during the focusing process, and the elements in the final lens group G2 (e.g., lenses, aperture stops, and / or diaphragms) do not move relative to each other during the focusing process. Furthermore, during the focusing process, the final lens group G2 does not move relative to the reflecting element E6.

[0449] The first lens E1 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are spherical.

[0450] The second lens E2 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical. Its object-side surface has one inflection point, and its image-side surface has five inflection points. Its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0451] The third lens E3 has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical, and its object-side surface has three inflection points.

[0452] The fourth lens E4 has positive refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical. Its object-side surface has four inflection points, and its object-side surface has a critical point off-axis.

[0453] The fifth lens E5 has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical. Its object-side surface has a point of inflection, its image-side surface has a point of inflection, its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0454] The reflective element E6 is made of glass and is positioned along the optical axis between the fifth lens E5 and the imaging plane IMG, without affecting the focal length of the imaging lens. The reflective element E6 is a prism, which functions as a light path deflector. For ease of explanation, Figure 28 The bending effect of the reflective element E6 on the optical path is not shown. However, the reflective element E6 can have various forms depending on the actual design requirements, thus causing different bending effects on the optical path. In this embodiment, the reflective element E6 can, for example, have similar... Figures 53 to 58 The structure can be referred to the aforementioned corresponding structure. Figures 53 to 58 The explanation will not be repeated here. Furthermore, the reflective element E6 in this embodiment may also have, for example, a similar Figure 50 The structure allows the optical path to bend five times, as can be seen in the aforementioned corresponding... Figure 50 The explanation will not be repeated here.

[0455] The filter element E7 is made of plastic and is located between the reflective element E6 and the imaging surface IMG. It does not affect the focal length of the optical lens used for imaging.

[0456] Please refer to Tables 10A to 10D below.

[0457]

[0458] In this embodiment, the imaging optical lens is in the second state with the subject located at a finite object distance of 119.233 mm as an example, but this disclosure is not limited to this.

[0459]

[0460]

[0461] The definitions described in Table 10B are the same as those in the first embodiment. It should be understood that this embodiment only discloses the above two moving focus states, but this disclosure is not limited to the states disclosed above, 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 in addition to the first state and the second state, so as to correspond to other focusing states with different object distances.

[0462] As shown in Table 10B, the imaging optical lens performs a focusing process based on changes in object distance. During the focusing process as the imaging optical lens transitions from the first state to the second state, the moving lens group G1 moves relative to the final lens group G2 along the optical axis toward the object side. Specifically, when the object distance changes from infinity to 119.233 mm, the imaging optical lens transitions from the first state to the second state. The distance D1 between the moving lens group G1 and the final lens group G2 along the optical axis increases from 0.540 mm in the first state to 1.337 mm in the second state. However, the final lens group G2 does not move relative to the reflecting element E6 during the focusing process. In other words, as the object distance decreases, the moving lens group G1 moves relative to the final lens group G2 along the optical axis toward the object side during the focusing process.

[0463]

[0464]

[0465] In the tenth embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in Table 10D below are the same as in the first embodiment and will not be repeated here.

[0466]

[0467]

[0468] <Eleventh Embodiment>

[0469] Please refer to Figure 31 This is a perspective view illustrating an image-capturing device according to the eleventh embodiment of this disclosure. In this embodiment, the image-capturing device 100 is a camera module. The image-capturing device 100 includes an imaging lens 101, a driving device 102, an electronic photosensitive element 103, and an image stabilization module 104. The imaging lens 101 includes the imaging optical lens of the first embodiment described above, a lens barrel (not otherwise labeled) for supporting the imaging optical lens, and a support device (Holder Member, not otherwise labeled). The imaging lens 101 can also be replaced with imaging optical lenses of other embodiments described above, and this disclosure is not limited thereto. The image-capturing device 100 uses the imaging lens 101 to focus light to generate an image, and cooperates with the driving device 102 to focus the image, finally imaging it on the electronic photosensitive element 103 and outputting it as image data.

[0470] The driving device 102 may have an auto-focus function, and its driving method may include, but is not limited to, a screw, voice coil motor (VCM), microelectromechanical system (MEMS), piezoelectric system, shape memory alloy, spring type, or ball type driving system. The driving device 102 enables the imaging lens 101 to achieve a better imaging position, allowing clear images to be captured of the subject at different object distances. In addition, the image capturing device 100 is equipped with a high-sensitivity and low-noise electronic image sensor 103 (such as CMOS or CCD) located on the imaging surface of the imaging optical lens, which can truly present the good image quality of the imaging optical lens.

[0471] The image stabilization module 104 may be, for example, an accelerometer, a gyroscope, or a Hall effect sensor. The drive unit 102 may work in conjunction with the image stabilization module 104 to form an optical image stabilization (OIS) device. By adjusting the changes in different axes of the imaging lens 101, it can compensate for the blurry image caused by shaking during shooting, or use image compensation technology in the imaging software to provide electronic image stabilization (EIS), further improving the image quality of shooting in dynamic and low-light scenes.

[0472] <Twelfth Embodiment>

[0473] Please refer to Figures 32 to 34 ,in Figure 32 A perspective view of one side of an electronic device according to the twelfth embodiment of this disclosure is shown. Figure 33 Draw Figure 32 A three-dimensional diagram of the other side of the electronic device, and Figure 34 Draw Figure 32 System block diagram of an electronic device.

[0474] In this embodiment, the electronic device 200 is a smartphone. The electronic device 200 includes, according to the eleventh embodiment, image capturing devices 100a, 100b, 100c, 100d, and 100e, a flash module 201, a focus assist module 202, an image signal processor 203, a display module 204, and an image software processor 205. Image capturing devices 100, 100a, and 100b are all located on the same side of the electronic device 200 and are all single-focus. The focus assist module 202 may employ a laser rangefinder or a Time-of-Flight (ToF) module, but this disclosure is not limited thereto. Image capturing devices 100c, 100d, 100e, and display module 204 are all disposed on the other side of electronic device 200, and display module 204 can serve as a user interface, enabling image capturing devices 100c, 100d, and 100e to function as front-facing lenses for selfies, but this disclosure is not limited thereto. Furthermore, image capturing devices 100a, 100b, 100c, 100d, and 100e can all include the imaging optical lens disclosed herein and can all have a structural configuration similar to that of image capturing device 100. Specifically, each of image capturing 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 each can include a reflective element as a component for deflecting the light path. The imaging lenses of imaging devices 100a, 100b, 100c, 100d, and 100e may each include, for example, an imaging optical lens as disclosed herein, a lens barrel for carrying the imaging optical lens, and a support device.

[0475] Image capturing device 100 is a telescopic image capturing device with a reversible optical path. Image capturing device 100a is a wide-angle image capturing device, image capturing device 100b is an ultra-wide-angle image capturing device, image capturing device 100c is a wide-angle image capturing device, image capturing device 100d is an ultra-wide-angle image capturing device, and image capturing device 100e is a time-of-flight ranging image capturing device. In this embodiment, image capturing devices 100, 100a, and 100b have different viewing angles, allowing the electronic device 200 to provide different magnifications to achieve optical zoom shooting effects. Additionally, image capturing device 100e can acquire depth information of the image. The optical path reversal configuration of image capturing device 100 can, for example, have a similar... Figures 42 to 52 The structure can be referred to the aforementioned corresponding structure. Figures 42 to 52The explanation will not be repeated here. Furthermore, the image capturing devices 100a, 100b, 100c, 100d, and 100e may also have an optical path reversal configuration, and may also have, for example, similar... Figures 42 to 52 The structure can be referred to the aforementioned corresponding structure. Figures 42 to 52 The above-described electronic device 200 is exemplified by including multiple image capturing devices 100, 100a, 100b, 100c, 100d, and 100e, but the number and configuration of the image capturing devices are not intended to limit this disclosure.

[0476] When the user photographs the subject 206, the electronic device 200 uses the image capturing device 100, image capturing device 100a, or image capturing device 100b to focus the light, activates the flash module 201 for supplemental lighting, and uses the subject distance information of the subject 206 provided by the focus assist module 202 for fast focusing. Furthermore, the image signal processor 203 performs image optimization processing to further improve the image quality produced by the imaging lens. The focus assist module 202 can use an infrared or laser focus assist system to achieve fast focusing. Alternatively, the electronic device 200 can also use the image capturing device 100c, image capturing device 100d, or image capturing device 100e for shooting. The display module 204 can use a touch screen, combined with the diverse functions of the image software processor 205 for image capturing and image processing (or can use a physical shooting button). The image processed by the image software processor 205 can be displayed on the display module 204.

[0477] <Thirteenth Embodiment>

[0478] Please refer to Figure 35 and Figure 36 ,in Figure 35 A schematic diagram showing one side of an electronic device according to the thirteenth embodiment of this disclosure is provided. Figure 36 Draw Figure 35 A schematic diagram of the other side of the electronic device.

[0479] In this embodiment, the electronic device 300 is a smartphone. The electronic device 300 includes, according to the eleventh embodiment, image capturing devices 100, 100f, 100g, and 100h, and a display module 304. Figure 35 As shown, image capturing devices 100, 100f, and 100g are all located on the same side of the electronic device 300 and are all single-focus. Figure 36As shown, the image capturing device 100h and the display module 304 are both disposed on the other side of the electronic device 300. The image capturing device 100h can serve as a front-facing lens to provide a selfie function, but this disclosure is not limited thereto. Furthermore, the image capturing 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 image capturing device 100. In detail, each of the image capturing devices 100f, 100g, and 100h can include an imaging lens, a driving device, an electronic photosensitive element, and an image stabilization module. The imaging lens of each of the image capturing devices 100f, 100g, and 100h can include, for example, the imaging optical lens disclosed herein, a lens barrel for supporting the imaging optical lens, and a support device.

[0480] Image capturing device 100 is a telephoto image capturing device, image capturing device 100f is a wide-angle image capturing device, image capturing device 100g is an ultra-wide-angle image capturing device, and image capturing device 100h is a wide-angle image capturing device. In this embodiment, image capturing devices 100, 100f, and 100g have different viewing angles, allowing the electronic device 300 to provide different magnifications to achieve an optical zoom shooting effect. Furthermore, as... Figure 36 As shown, the opening of the image capturing device 100h can be non-circular, and the lens barrel or lens inside the image capturing device 100h can be cut at the outer diameter to have a chamfered edge to match the non-circular opening. This allows for a further reduction in the single-axis length of the image capturing device 100h, which helps to reduce the lens volume, increase the area ratio of the display module 304 relative to the electronic device 300, and reduce the thickness of the electronic device 300, further achieving module miniaturization. At least one lens, after being cut at the outer diameter, can have a non-circular optically effective area. The above-described electronic device 300 is exemplified by including multiple image capturing devices 100, 100f, 100g, and 100h, but the number and configuration of the image capturing devices are not intended to limit this disclosure.

[0481] <Fourteenth Embodiment>

[0482] Please refer to Figure 37 This is a perspective view illustrating one side of an electronic device according to the fourteenth embodiment of this disclosure.

[0483] In this embodiment, the electronic device 400 is a smartphone. The electronic device 400 includes, according to the eleventh embodiment, image capturing devices 100i, 100j, 100k, 100m, 100n, 100p, 100q, and 100r, a flash module 401, a focus assist module, an image signal processor, a display module, and an image software processor (not shown). Image capturing devices 100i, 100j, 100k, 100m, 100n, 100p, 100q, and 100r are all 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. Furthermore, the imaging devices 100i, 100j, 100k, 100m, 100n, 100p, 100q, and 100r may all include the imaging optical lens disclosed herein and may all have a structural configuration similar to that of the imaging device 100, which will not be described in detail here.

[0484] Image capturing device 100 is a telephoto image capturing device with a reversible optical path; image capturing device 100i is a telephoto image capturing device with a reversible optical path; image capturing device 100j is a wide-angle image capturing device; image capturing device 100k is a wide-angle image capturing device; image capturing device 100m is an ultra-wide-angle image capturing device; image capturing device 100n is an ultra-wide-angle image capturing device; image capturing device 100p is a telephoto image capturing device; image capturing device 100q is a telephoto image capturing device; and image capturing device 100r is a time-of-flight ranging image capturing device. In this embodiment, image capturing devices 100, 100i, 100j, 100k, 100m, 100n, 100p, and 100q have different viewing angles, allowing the electronic device 400 to provide different magnification ratios to achieve optical zoom shooting effects. Furthermore, the image capturing device 100r can acquire depth information of the image. The optical path reversal configuration of the image capturing devices 100 and 100i can, for example, have a similar... Figures 42 to 52 The structure can be referred to the aforementioned corresponding structure. Figures 42 to 52The description of the above-described electronic device 400 will not be repeated here. The electronic device 400 described above is exemplified by including multiple image capturing devices 100, 100i, 100j, 100k, 100m, 100n, 100p, 100q, and 100r, but the number and configuration of the image capturing devices are not intended to limit this disclosure. When a user photographs a subject, the electronic device 400 uses image capturing devices 100, 100i, 100j, 100k, 100m, 100n, 100p, 100q, or 100r to focus light and capture an image, activates the flash module 401 for supplemental lighting, and performs subsequent processing in a manner similar to the aforementioned embodiments, which will not be repeated here.

[0485] The image capturing device disclosed herein is not limited to smartphones. It can also be applied to mobile focusing systems as needed, offering excellent aberration correction and good image quality. For example, the image capturing device can be used in a wide range of electronic devices, including 3D image capture, digital cameras, mobile products, tablet computers, smart TVs, network monitoring equipment, dashcams, reversing cameras, multi-lens devices, recognition systems, motion-sensing game consoles, drones, wearable products, and personal video recorders. The aforementioned electronic devices are merely illustrative examples of practical applications of this disclosure and do not limit the scope of application of the image capturing device disclosed herein.

[0486] Although this disclosure is presented above with reference to the preferred embodiments described above, it is not intended to limit this disclosure. Any person skilled in the art may make some modifications and refinements without departing from the spirit and scope of this disclosure. Therefore, the scope of patent protection of this disclosure shall be determined by the claims appended to this specification.

Claims

1. An optical lens for imaging, characterized in that, It includes five lenses. The five lenses are, in sequence from an object side to an image side along the optical path direction, a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. And 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; Among them, the first lens has a positive refractive power. The object-side surface of the first lens is convex near the optical axis. The object-side surface of the second lens is convex near the optical axis. The image-side surface of the second lens is concave near the optical axis. The third lens has a negative refractive power. The object-side surface of the third lens is concave near the optical axis. The fourth lens has a positive refractive power. And at least one surface of at least one lens in the imaging optical lens has at least one inflection point; Among them, when the object is at an infinite object distance, the imaging optical lens is in a first state; and Among them, 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 an imaging plane on the optical axis is BLL. 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. The radius of curvature of the object-side surface of the first lens is R1. The radius of curvature of the object-side surface of the third lens is R5. The focal length of the second lens is f2. The focal length of the third lens is f3. They satisfy the following conditions: 2.00 < BLL / TDL < 5.50; -0.50 < (R1 - R5) / (R1 + R5) < 5.00; and 0 < |f3 / f2| < 1.

00.

2. The imaging optical lens according to claim 1, characterized in that, 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 plane on the optical axis is BLL. 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. They satisfy the following conditions: 2.30 < BLL / TDL < 4.

50.

3. The imaging optical lens according to claim 1, characterized in that, The focal length of the second lens is f2. The focal length of the third lens is f3. They satisfy the following conditions: 0 < |f3 / f2| < 0.

80.

4. The imaging optical lens according to claim 1, characterized in that, The fifth lens has a negative refractive power; and Among them, the radius of curvature of the object-side surface of the first lens is R1. The radius of curvature of the object-side surface of the third lens is R5. They satisfy the following conditions: 0.50 < (R1 - R5) / (R1 + R5) < 4.

50.

5. The imaging optical lens according to claim 1, characterized in that, 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 plane on the optical axis is TLL. When the imaging optical lens is in the first state, the focal length is fL. 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. They satisfy the following conditions: 1.30 < TLL / fL < 1.70; and 0.12 < 10×T45L / fL < 1.

00.

6. The imaging optical lens according to claim 1, characterized in that, 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 satisfy the following conditions: -3.00 < fL / f3 < -1.

00.

7. The imaging optical lens according to claim 1, characterized in that, The radius of curvature of the object-side surface of the first lens is R1, the radius of curvature of the image-side surface of the second lens is R4, and the Abbe number of the fifth lens is V5, which satisfy the following conditions: -1.00 < (R1 - R4) / (R1 + R4) < 1.50; and 5.0<V5<30.0。 8. The imaging optical lens 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, and the thickness of the fourth lens on the optical axis is CT4, which satisfy the following conditions: 0.65 < T23L / CT4 < 2.

50.

9. The imaging optical lens according to claim 1, characterized in that, When the imaging optical lens is in the first state, half of the maximum viewing angle is HFOVL, 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, 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, and the maximum imaging height of the imaging optical lens is ImgH, which satisfy the following conditions: 8.0 degrees < HFOVL < 20.0 degrees; 1.30 < Y1R1L / Y5R2L < 1.80; and 0.65 < Y1R1L / ImgH < 1.

20.

10. An image capturing 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.

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

12. An optical lens for imaging, characterized in that, Comprising five lenses, and the five lenses are, in the light path direction from an object side to an image side in sequence, a first lens, a second lens, a third lens, a fourth lens, and a 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; Wherein, the first lens has a positive refractive power, the object-side surface of the first lens is convex near the optical axis, the object-side surface of the second lens is convex near the optical axis, the third lens has a negative refractive power, the object-side surface of the third lens is concave near the optical axis, the fourth lens has a positive refractive power, and at least one surface of at least one lens in the imaging optical lens has at least one anaclastic point; Wherein, when the object is at an infinite object distance, the imaging optical lens is in a first state; and Wherein, 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 an imaging surface on the optical axis is BLL, 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 when the imaging optical lens is in the first state is TDL, the refractive index of the first lens is N1, the refractive index of the fifth lens is N5, the Abbe number of the fifth lens is V5, the thickness of the fifth lens on the optical axis is CT5, and the distance between the fourth lens and the fifth lens on the optical axis when the imaging optical lens is in the first state is T45L, which satisfy the following conditions: 2.00 < BLL / TDL < 5.50; 1.750<N1<2.200； 5.00 < V5 / N5 < 15.20; and 0.10 < CT5 / T45L < 3.

00.

13. The imaging optical lens according to claim 12, characterized in that, When the imaging optical lens is in the first state, the aperture value is FnoL, the thickness of the fifth lens on the optical axis is CT5, and the distance between the fourth lens and the fifth lens on the optical axis when the imaging optical lens is in the first state is T45L, which satisfies the following conditions: 1.80 < FnoL < 2.50; and 0.15 < CT5 / T45L < 2.

00.

14. The imaging optical lens according to claim 12, 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, the focal length of the imaging optical lens in the first state is fL, and the radius of curvature of the object-side surface of the third lens is R5, which satisfies the following conditions: 0.50 < CT1 / CT2 < 2.20; and -9.00 < fL / R5 < -2.

00.

15. The imaging optical lens according to claim 12, characterized in that, The second lens has positive refractive power; and Where, the radius of curvature of the object-side surface of the second lens is R3, the radius of curvature of the image-side surface of the second lens is R4, and the focal length of the imaging optical lens in the first state is fL, which satisfies the following conditions: 0.20 < |R3 / fL| + |R4 / fL| < 2.

20.

16. The imaging optical lens according to claim 12, characterized in that, The first lens is made of glass; and Where, the refractive index of the first lens is N1, which satisfies the following conditions: 1.800<N1<2.100。 17. The imaging optical lens according to claim 12, characterized in that, It further includes an aperture. When the imaging optical lens is in the first state, the distance from the aperture to the image-side surface of the lens closest to the image side on the optical axis is SDL, and 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 when the imaging optical lens is in the first state is TDL, which satisfies the following conditions: 0.87 < SDL / TDL < 1.

20.

18. The imaging optical lens according to claim 12, characterized in that, At least one surface of at least one lens in the imaging optical lens has at least one critical point off the axis; and Where, 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 second lens on the optical axis is CT2, which satisfies the following conditions: 0.80 < T34L / CT2 < 2.

00.

19. The imaging optical lens according to claim 12, characterized in that, When the imaging optical lens is in the first state, the displacement parallel to the optical axis from the intersection of the object-side surface of the second lens on the optical axis to the maximum effective radius position of the object-side surface of the second lens is Sag2R1L, the thickness of the second lens on the optical axis is CT2, and the distance parallel to the optical axis from the maximum effective radius position of the image-side surface of the first lens to the maximum effective radius position of the object-side surface of the second lens when the imaging optical lens is in the first state is ET12L, which satisfies the following conditions: 0.40 < Sag2R1L / CT2 < 1.20; and 0.70 < ET12L / CT2 < 1.

50.

20. The imaging optical lens according to claim 12, characterized in that, 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 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. The radius of curvature of the object-side surface of the first lens is R1, and the radius of curvature of the object-side surface of the third lens is R5. The focal length of the imaging optical lens in the first state is fL, the focal length of the second lens is f2, and the focal length of the third lens is f3. The refractive index of the first lens is N1, the refractive index of the fifth lens is N5, and the Abbe number of the fifth lens is V5. The thickness of the fifth lens on the optical axis is CT5. 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 following conditions are satisfied: 2.67 ≤ BLL / TDL ≤ 3.76; 1.36 ≤ (R1 - R5) / (R1 + R5) ≤ 3.46; 0.02 ≤ |f3 / f2| ≤ 0.40; 1.883≤N1≤1.954； 10.91 ≤ V5 / N5 ≤ 14.34; 0.30 ≤ CT5 / T45L ≤ 0.87; and -2.76 ≤ fL / f3 ≤ -1.

48.

21. An optical lens for imaging, characterized in that, Along the light path direction from the object side to the image side, it sequentially includes a moving lens group and a last lens group. The moving 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 and an image-side surface facing the image side; wherein, when the object is at an infinite object distance, 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 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 near the optical axis, and at least one surface of at least one lens in the imaging optical lens has at least one anti-bending point; and wherein, 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 an imaging surface on the optical axis is BLL. 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. The aperture value of the imaging optical lens in the first state is FnoL, and the following conditions are satisfied: [[ID=ill]]2.00 < BLL / TDL < 5.50; and 1.80 < FnoL < 2.

50.

22. The imaging optical lens according to claim 21, characterized in that, When the imaging optical lens is in the first state, its focal length is fL, the focal length of the movable lens group is fG1. 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 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 they satisfy the following conditions: 0.80 < fL / fG1 < 1.80; and 0.30 mm < |TDS - TDL| < 1.10 mm.

23. The imaging optical lens according to claim 21, characterized in that, 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 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 object-side surface of the lens closest to the object side to the imaging surface is TLS. The distance on the optical axis from the object-side surface of the lens closest to the object side to the imaging surface when the imaging optical lens is in the first state is TLL, and they satisfy the following conditions: 0.01 < DG2 / DG1 < 0.

40.

24. The imaging optical lens according to claim 21, characterized in that, 0.80 < fL / fG1 < 1.80; and 1.00 < 10×|TDS - TDL| / TDL < 2.50; and 1.025 < TLS / TLL < 1.

100.

25. The imaging optical lens according to claim 21, characterized in that, It further includes a reflection element, where the reflection element is located between the last lens group and the imaging surface along the optical path direction, and there are no other lenses on the optical axis between the last lens group and the reflection element; and where, during the moving focusing process, the last lens group has no relative movement with respect to the reflection element.

26. The imaging optical lens according to claim 21, 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 direction, the first lens, the second lens, the third lens, the fourth lens, and the fifth lens. The movable lens group includes the first lens, the second lens, the third lens, and the fourth lens. The last lens group includes the fifth lens. The lenses in the movable lens group have no relative movement with respect to each other during the moving focusing process. The lenses in the last lens group have no relative movement with respect to each other during the moving focusing process, and the first lens has a positive refractive power.

27. The imaging optical lens according to claim 26, characterized in that, The object-side surface of the second lens is convex near the optical axis. The object-side surface of the third lens is concave near the optical axis, and the third lens has a negative refractive power.

28. The imaging optical lens according to claim 26, characterized in that, The fourth lens has positive refractive power; and 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 second lens to the image-side surface of the fourth lens in the first state is Dr3r8L, which satisfies the following conditions: 0.15 <CT1 / Dr3r8L<0.65。 29. The imaging optical lens according to claim 21, characterized in that, It also includes a prism, wherein the prism is located between the last lens group and the imaging plane along the optical path direction, and the prism has at least two reflective surfaces.

30. The imaging optical lens according to claim 29, characterized in that, The prism further includes a first penetrating surface, and the at least two reflecting surfaces of the prism sequentially include a first reflecting surface and a second reflecting surface along the optical path from the object side to the image side, and the first penetrating surface, the first reflecting surface, and the second reflecting surface are arranged sequentially along the optical path from the object side to the image side; and The first penetrating surface and the second reflecting surface are located on the same plane.

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