Image capturing optical lens group, image capturing device and electronic device

Abstract

The invention discloses an image capturing optical lens group, which comprises two lens groups, namely a first lens group and a second lens group in sequence from an object side to an image side along an optical path. The image capturing optical lens group has a first state corresponding to an infinite object distance. The image capturing optical lens group in the first state has a long focal length end first state corresponding to the long focal length end and a short focal length end first state corresponding to the short focal length end in the zooming process. At least one lens group of the two lens groups moves in the optical axis direction in the zooming process. The first lens group has positive refractive power. At least one of the object-side surface and the image-side surface of at least one lens in the two lens groups has at least one inflection point at an off-axis position. When specific conditions are met, the imaging optical lens group can simultaneously meet the requirements of zooming function, miniaturization and high imaging quality. The invention further discloses an image capturing device with the image capturing optical lens group and an electronic device with the image capturing device.

Description

Technical Field

[0001] This disclosure relates to an image-capturing optical lens assembly, an image-capturing device, and an electronic device, particularly an image-capturing optical lens assembly and an image-capturing device suitable for electronic devices. Background Technology

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

[0003] With the rapid advancement of technology, electronic devices equipped with optical lenses are finding increasingly wider applications, leading to more diverse requirements for these lenses. Since existing optical lenses often struggle to achieve a balance between image quality, sensitivity, aperture size, size, and viewing angle, this invention provides an optical lens with high image quality to meet these demands.

[0004] Specifically, in recent years, electronic products and devices have demanded thinner and lighter designs, making it difficult for traditional optical lenses to simultaneously meet the requirements of high specifications and miniaturization, especially for miniature lenses with large apertures or telephoto features. Existing telephoto lens technologies are gradually becoming inadequate, exhibiting problems such as excessive length, small aperture, insufficient image quality, or inability to be miniaturized. Therefore, different optical features are needed to address these issues and meet these requirements.

[0005] Furthermore, to enhance the shooting experience in the mid-to-long focal length range, some current mobile phones use fixed-focus telephoto lenses combined with digital zoom processing technology. The resulting visual effect is not derived from true optical zoom, leading to a decrease in image quality. Alternatively, other mobile phones achieve zoom effects from near to far by using multiple lenses with different focal lengths working together. However, this approach suffers from drawbacks such as stuttering when switching between lenses and discrepancies in light intake and color saturation, resulting in a poor shooting experience. Multiple lenses also significantly increase the space occupied by the image sensor in electronic products. Summary of the Invention

[0006] This disclosure provides an image-capturing optical lens assembly, an image-capturing device, and an electronic device. The image-capturing optical lens assembly comprises two groups of lenses arranged sequentially from the object side to the image side along the optical path. Under certain conditions, the image-capturing optical lens assembly provided by this disclosure can simultaneously meet the requirements of zoom functionality, miniaturization, and high image quality.

[0007] The present disclosure provides an imaging optical lens group, which includes two lens groups. The two lens groups are sequentially the first lens group and the second lens group along the optical path from an object side to an image side, and all the lenses of the two lens groups respectively have an object side surface facing the object side direction and an image side surface facing the image side direction. The total number of lens groups of the imaging optical lens group is two. Preferably, the imaging optical lens group has a first state corresponding to an infinite object distance. Preferably, the imaging optical lens group in the first state has a first long focal length state corresponding to the long focal end and a first short focal length state corresponding to the short focal end during a zooming process. Preferably, at least one of the two lens groups moves along the optical axis direction during the zooming process. Preferably, the first lens group has a positive refractive power. Preferably, at least one of the object side surface and the image side surface of at least one lens in the two lens groups has at least one inflection point at an off-axis position. Half of the maximum viewing angle of the imaging optical lens group in the first short focal length state is HFOVSf, half of the maximum viewing angle of the imaging optical lens group in the first long focal length state is HFOVLf, the distance from the object side surface of the lens closest to the object side in the first short focal length state of the imaging optical lens group to the imaging surface on the optical axis is TLSf, and the distance from the object side surface of the lens closest to the object side in the first long focal length state of the imaging optical lens group to the imaging surface on the optical axis is TLLf, and preferably satisfies the following conditions:

[0008] 1.20 < HFOVSf / HFOVLf < 2.50; and

[0009] 0 ≤ 10 × |TLSf - TLLf| / TLSf < 1.00.

[0010] The present disclosure further provides an imaging optical lens group, which includes two lens groups. The two lens groups are sequentially the first lens group and the second lens group along the optical path from an object side to an image side, and all the lenses of the two lens groups respectively have an object side surface facing the object side direction and an image side surface facing the image side direction. The total number of lens groups of the imaging optical lens group is two. Preferably, the imaging optical lens group has a first state corresponding to an infinite object distance and a second state corresponding to a finite object distance. Preferably, when an object moves from an infinite object distance to a finite object distance, the imaging optical lens group undergoes a focusing process to change from the first state to the second state. Preferably, the imaging optical lens group in the first state has a first long focal end state corresponding to the long focal end and a first short focal end state corresponding to the short focal end during a zooming process. Preferably, at least one of the two lens groups moves along the optical axis direction during the zooming process. Preferably, at least one of the object side surface and the image side surface of at least one lens in the two lens groups has at least one inflection point at an off-axis position. Half of the maximum viewing angle of the imaging optical lens group in the first short focal end state is HFOVSf, half of the maximum viewing angle of the imaging optical lens group in the first long focal end state is HFOVLf, the distance from the object side surface of the lens closest to the object side in the first short focal end state of the imaging optical lens group to the imaging surface on the optical axis is TLSf, and the distance from the object side surface of the lens closest to the object side in the first long focal end state of the imaging optical lens group to the imaging surface on the optical axis is TLLf, which preferably satisfies the following conditions:

[0011] 1.20 < HFOVSf / HFOVLf < 2.50; and

[0012] 0 ≤ 10 × |TLSf - TLLf| / TLSf < 1.00.

[0013] The present disclosure provides an imaging device, which includes the aforementioned imaging optical lens group and an electronic photosensitive element, wherein the electronic photosensitive element is disposed on the imaging surface of the imaging optical lens group.

[0014] The present disclosure provides an electronic device, which includes a first imaging device and a second imaging device. The first imaging device includes the aforementioned imaging device, and half of the maximum viewing angle in the first imaging device falls within the range of 5 degrees to 30 degrees. The second imaging device is on the same side of the electronic device as the first imaging device, and half of the maximum viewing angle in the second imaging device falls within the range of 30 degrees to 60 degrees.

[0015] The imaging optical lens group, imaging device, and electronic device disclosed herein can be modified by cutting sections of the lens barrel or lens to reduce the single-axis length, thus reducing lens size and further achieving modular miniaturization, in order to meet the thickness limitations of the electronic device. Additionally, reflective elements can be incorporated to provide different optical path directions for the overall system, giving the lens more flexible usage space to demonstrate the telephoto capabilities of a long focal length. Furthermore, through the grouping design of the lens group, the focal length of the imaging optical lens group can be adjusted according to the distance (object distance) of the photographed object by varying the spacing of each lens group, thereby achieving zoom and focus. This achieves high image quality for both distant and close-up shots, contributing to greater freedom in lens shooting.

[0016] When HFOVSf / HFOVLf meets the above conditions, the optical zoom ratio can be increased, which helps to improve the shooting quality and shooting versatility in the mid-to-long focal length range.

[0017] When 10×|TLSf-TLLf| / TLSf meets the above conditions, a comparable total optical length can be maintained during zooming and focusing, which helps to simplify the complexity of the mechanism design, facilitates lens assembly, and improves the pass rate.

[0018] The above description of the contents of this disclosure and the following description of the embodiments are used to demonstrate and explain the principles of this disclosure, and to provide a further explanation of the claims of this disclosure. Attached Figure Description

[0019] Figure 1 The diagram illustrates the imaging device according to the first embodiment of this disclosure in a first state at the short focal length end and a first state at the long focal length end.

[0020] Figure 2 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the first embodiment in the first state at the short focal length.

[0021] 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 first state at the telephoto end.

[0022] Figure 4 The diagram illustrates the imaging device according to the second embodiment of this disclosure in a first state at the short focal length end and a first state at the long focal length end.

[0023] Figure 5 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the second embodiment in the first state at the short focal length.

[0024] 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 first state at the telephoto end.

[0025] Figure 7 The diagram illustrates the imaging device according to the third embodiment of this disclosure in a first state at the short focal length end and a first state at the long focal length end.

[0026] Figure 8 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the third embodiment in the first state at the short focal length.

[0027] 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 first state at the telephoto end.

[0028] Figure 10 The diagram illustrates the imaging device according to the fourth embodiment of this disclosure in a first state at the short focal length end and a first state at the long focal length end.

[0029] Figure 11 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the fourth embodiment in the first state at the short focal length.

[0030] 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 first state at the telephoto end.

[0031] Figure 13 A perspective schematic diagram of an imaging device according to a fifth embodiment of this disclosure is shown.

[0032] Figure 14 A perspective view of one side of an electronic device according to the sixth embodiment of this disclosure is shown.

[0033] Figure 15 Draw Figure 14 A three-dimensional diagram of the other side of the electronic device.

[0034] Figure 16 A perspective view of one side of an electronic device according to the seventh embodiment of this disclosure is shown.

[0035] Figure 17 Draw Figure 16 A three-dimensional diagram of the other side of the electronic device.

[0036] Figure 18 Draw Figure 16 System block diagram of an electronic device.

[0037] Figure 19 A perspective view of one side of an electronic device according to the eighth embodiment of this disclosure is shown.

[0038] Figure 20A schematic diagram illustrating the inflection point and critical point of a portion of the lens of an image-taking device in a first state at the short focal length end according to the first embodiment of this disclosure.

[0039] Figure 21 A schematic diagram illustrating one configuration of the reflective element in an image-collecting optical lens assembly according to the present disclosure is shown.

[0040] Figure 22 A schematic diagram illustrating another configuration of the reflective element in the imaging optical lens assembly according to the present disclosure is shown.

[0041] Figure 23 A schematic diagram illustrating another configuration of the reflective element in the imaging optical lens assembly according to the present disclosure is shown.

[0042] Figure 24 A schematic diagram illustrating one configuration of two reflective elements in an imaging optical lens assembly according to the present disclosure is shown.

[0043] Figure 25 A schematic diagram illustrating another configuration of the two reflective elements in the imaging optical lens group according to the present disclosure is shown.

[0044] [Symbol Explanation]

[0045] 1, 2, 3, 4, 100, 100a, 100b, 100c, 100d, 100e, 100f, 100g, 100h, 100i, 100j, 100k, 100m, 100n, 100p, 100q, 100r: imaging device

[0046] 101: Imaging Lens

[0047] 102: Drive unit

[0048] 103: Electronic photosensitive element

[0049] 104: Image Stabilization Module

[0050] 200, 300, 400: Electronic devices

[0051] 201, 304: Display module

[0052] 301, 401: Flash module

[0053] 302: Focusing Assist Module

[0054] 303: Image Signal Processor

[0055] 305: Image Software Processor

[0056] 306: Subject

[0057] P: Inversion point

[0058] C: Critical point

[0059] LG: Lens Group

[0060] FT: Filter element

[0061] LF, LF1, LF2: Reflective elements

[0062] LP1, LP2: Penetration surface

[0063] RF1, RF2: Reflecting surfaces

[0064] OA: Optical Axis

[0065] OA1: First optical axis

[0066] OA2: Second optical axis

[0067] OA3: Third optical axis

[0068] ST: Aperture

[0069] S1, S2, S3: Aperture

[0070] E1: First lens

[0071] E2: Second lens

[0072] E3: Third Lens

[0073] E4: Fourth Lens

[0074] E5: Fifth Lens

[0075] E6: Sixth Lens

[0076] E7: Filter element

[0077] IMG: Imaging Surface

[0078] IS: Electronic photosensitive element

[0079] G1: First lens group

[0080] G2: Second lens group Detailed Implementation

[0081] The imaging optical lens assembly can comprise two lens groups. These two lens groups, arranged sequentially from the object side to the image side along the optical path, can be a first lens group and a second lens group. Each lens group can contain six lenses. These six lenses, arranged sequentially from the object side to the image side along the optical path, can be a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The total number of lens groups in the imaging optical lens assembly can be two. The first lens group can contain a first lens, a second lens, and a third lens, and the second lens group can contain a fourth lens, a fifth lens, and a sixth lens. Each lens can have an object-side surface facing the object side and an image-side surface facing the image side. In this way, the imaging optical lens assembly, through the configuration of a total of two lens groups, achieves a balance between overall size, zoom ratio, object distance range, focus shift, image quality, and ease of assembly, thereby realizing optical zoom and optical focusing in the medium to long focal length range.

[0082] The imaging optical lens group can have a first state corresponding to an infinity object distance and a second state corresponding to a finite object distance. The first state can be the state of the imaging optical lens group when the subject is at infinity (infinity object distance), and the second state can be the state of the imaging optical lens group when the subject is at a finite object distance (finite object distance). In this disclosure, the finite object distance can be when the subject is significantly closer to the imaging optical lens group relative to infinity. The infinity object distance refers to a distance on the optical axis between the subject and the lens closest to the object side (e.g., the first lens) in the imaging optical lens group, where the distance on the optical axis between their object-side surfaces is 1000 meters or more. The finite object distance refers to a distance on the optical axis between the subject and the lens closest to the object side (e.g., the first lens) in the imaging optical lens group, where the distance on the optical axis between their object-side surfaces is 5 meters or less. When the subject moves from infinity to the finite object distance, the imaging optical lens group can perform a focusing process to change from the first state to the second state. Conversely, when the subject moves from a finite object distance to an infinity object distance, the imaging optical lens group can also perform a focusing process to transition from the second state to the first state. At least one of the two lens groups can move along the optical axis during focusing. Specifically, the second lens group can move along the optical axis during focusing. This allows the overall lens structure of the imaging optical lens group to remain within the object-side range during focusing, improving lens operability and robustness, and simplifying optical design and mechanical complexity. Furthermore, the lenses in either the first or second lens group do not need to move relative to each other during focusing. This further simplifies the mechanical complexity.

[0083] When the image-capturing optical lens group is in its first state, it can have both a telephoto-end first state and a short-focal-end first state corresponding to the telephoto end and the short-focal-end first state during zooming. At least one of the two lens groups can move along the optical axis during zooming. Please refer to... Figure 1This is a schematic diagram illustrating the imaging optical lens group in the imaging device according to the first embodiment of the present disclosure in a first state at the short focal length end and a first state at the long focal length end, wherein... Figure 1 The upper part is a schematic diagram of the imaging optical lens group in the first state at the short focal length end, while Figure 1 The lower half of the diagram shows the imaging optical lens group in its first state at the telephoto end. The second lens group can move along the optical axis during zooming. This prevents the overall lens structure of the imaging optical lens group from stretching or contracting towards the object side during zooming, improving lens operability and robustness, and simplifying optical design and mechanical complexity. Furthermore, the lenses in either the first or second lens group do not need to move relative to each other during zooming. This further simplifies the mechanism's complexity.

[0084] Similarly, when the imaging optical lens group is in the second state, the imaging optical lens group can have a telephoto end second state corresponding to the telephoto end and a short focal length end second state corresponding to the short focal length end during the zoom process.

[0085] The first lens group can have positive refractive power. This allows the refractive power of the first lens group to be adjusted to converge light, which helps to simultaneously control the shooting angle and increase the amount of light entering the camera.

[0086] The lens closest to the object side in the first lens group can have positive refractive power. This helps to converge light rays, effectively control the direction of the light path, and achieve a balance between viewing angle and volume distribution. In one embodiment, the lens closest to the object side in the first lens group can be the first lens.

[0087] The object-side surface of the first lens can be convex near the optical axis. This allows for adjustment of the surface shape of the first lens, which helps to compress the outer diameter of the imaging optical lens group at the object-side end.

[0088] The second lens can have negative refractive power. This effectively balances the refractive power of the first lens, preventing excessive light refraction at an excessive angle and thus avoiding too many aberrations.

[0089] The sixth lens can have negative refractive power. This balances the refractive power of the imaging optical group at the image side, improving the light-gathering quality of each field of view at the imaging plane and reducing aberrations. The image side surface of the sixth lens can be concave near the optical axis. This helps balance the back focal length of the imaging optical group and corrects off-axis aberrations.

[0090] In the imaging optical lens assembly disclosed herein, at least one lens may have at least one inflection point off-axis on at least one of its object-side surface and its image-side surface. This increases the freedom of optical design, facilitating astigmatism correction. Specifically, the sixth lens may have at least one inflection point off-axis on its image-side surface. This allows control over the angle of light rays passing through the periphery of the sixth lens's image-side surface, helping to maintain optical illumination and avoid excessive aberrations caused by excessive light refraction angles. Please refer to... Figure 20 This is a schematic diagram illustrating the inflection point P of the first lens E1 object-side surface, the second lens E2 object-side surface, the second lens E2 image-side surface, the third lens E3 object-side surface, the third lens E3 image-side surface, the fourth lens E4 object-side surface, the fourth lens E4 image-side surface, the fifth lens E5 object-side surface, the fifth lens E5 image-side surface, the sixth lens E6 object-side surface, and the sixth lens E6 image-side surface, all in the first state at the short focal end according to the first embodiment of this disclosure. Figure 20 The inflection points of the first lens object-side surface, the second lens object-side surface, the second lens image-side surface, the third lens object-side surface, the third lens image-side surface, the fourth lens object-side surface, the fourth lens image-side surface, the fifth lens object-side surface, the fifth lens image-side surface, the sixth lens object-side surface, and the sixth lens image-side surface are illustrated as examples in the first embodiment. However, in the embodiments disclosed herein, each lens surface may have one or more inflection points off-axis.

[0091] In the imaging optical lens assembly disclosed in this disclosure, at least one lens may have at least one critical point off-axis on at least one of its object-side surface and its image-side surface. This enhances the ability to correct peripheral image aberrations. Please refer to... Figure 20 This is a schematic diagram illustrating the critical points C of the second lens E2 object-side surface, the third lens E3 object-side surface, the fourth lens E4 image-side surface, the fifth lens E5 object-side surface, the fifth lens E5 image-side surface, the sixth lens E6 object-side surface, and the sixth lens E6 image-side surface, respectively, in the first state at the short focal end according to the first embodiment of this disclosure. Figure 20 The critical points of the object-side surface of the second lens, the object-side surface of the third lens, the image-side surface of the fourth lens, the object-side surface of the fifth lens, the image-side surface of the fifth lens, the object-side surface of the sixth lens, and the image-side surface of the sixth lens in the first embodiment are illustrated as examples. However, in the embodiments disclosed herein, each lens surface may have one or more critical points at the off-axis.

[0092] The imaging optical lens assembly disclosed herein may include at least one reflective element, such as a prism or reflective mirror, with optical path deflection function between the subject and the imaging plane. The reflective element may be located between the subject and the first lens group. The reflective element may have at least one reflective surface, and the light path passing through the at least one reflective surface of the reflective element may be reflected at least once. This facilitates compression of the overall volume and allows the imaging optical lens assembly to have different optical path orientations, providing a more flexible spatial configuration. This allows the thinning and lightening of electronic devices to be unrestricted by the total optical length of the imaging optical lens assembly, helping to reduce structural limitations and miniaturize the lens, thereby achieving more stringent specification requirements.

[0093] The angle between the normal direction of the reflecting surface and the optical axis is not limited to 45 degrees and can be other angles depending on spatial configuration and other requirements. The reflecting element can deflect the light path from the optical axis near the object side to the optical axis near the image side. The angle between the optical axis vector near the object side and the optical axis vector near the image side can be any angle, not limited to 0, 90, or 180 degrees. In addition, for reasons such as reducing the occupied volume, the length and width of the mirror can be unequal, and the length, width, and height of the prism can also be unequal. The surface shape of the reflecting element (e.g., the surface shape of the prism surface or the mirror surface) can be planar, spherical, aspherical, or freeform, etc., depending on the requirements of optical design, but this disclosure is not limited to these. The reflecting element can be composed of more than one prism depending on the design requirements. The prism can be made of materials such as glass or plastic depending on the design requirements. In addition, prisms with light path deflection function are not counted in the lens, that is, the lens of the imaging optical lens group does not include prisms with light path deflection function.

[0094] For further explanation, please refer to Figures 21 to 23 Each of the above diagrams illustrates a configuration of a reflective element in an image-collecting optical lens assembly according to the present disclosure. Figures 21 to 23 As shown, the imaging optical lens group extends along the optical path from the subject (not shown) to the imaging surface IMG, and sequentially includes a reflective element LF, a lens group LG, a filter element FT, and the imaging surface IMG. The lens group LG corresponds to the two lens groups disclosed in this invention.

[0095] exist Figure 21 In this structure, the reflecting element LF is a prism, which sequentially has a first transmitting surface LP1, a reflecting surface RF1, and a second transmitting surface LP2 along the optical path. The optical path travels along the first optical axis OA1, passes through the first transmitting surface LP1, and reaches the reflecting surface RF1. The reflecting surface RF1 redirects the optical path from the first optical axis OA1 to the second optical axis OA2. The optical path then travels along the second optical axis OA2, passes through the second transmitting surface LP2, and then through the lens group LG and the filter element FT, finally reaching the imaging surface IMG. Figure 21As shown, the first penetrating surface LP1 and the second penetrating surface LP2 of the reflective element LF can both be planar.

[0096] exist Figure 22 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.

[0097] exist Figure 23 In this structure, the reflecting element LF is a prism, which sequentially has a first transmitting surface LP1, a reflecting surface RF1, and a second transmitting surface LP2 along the optical path. The optical path travels along the first optical axis OA1, passes through the first transmitting surface LP1, and reaches the reflecting surface RF1. The reflecting surface RF1 redirects the optical path from the first optical axis OA1 to the second optical axis OA2. The optical path then travels along the second optical axis OA2, passes through the second transmitting surface LP2, and then through the lens group LG and the filter element FT, finally reaching the imaging surface IMG. Figure 23 As shown, the first penetrating surface LP1 and the second penetrating surface LP2 of the reflective element LF can both be curved surfaces.

[0098] In addition, please refer to Figure 24 and Figure 25 The diagrams illustrate a configuration of two reflective elements according to this disclosure within an image-collecting optical lens assembly. For example... Figure 24 and Figure 25 As shown, the imaging optical lens assembly extends along the optical path from the subject (not shown) to the imaging surface IMG, sequentially comprising a first reflecting element LF1, a lens group LG, a filter element FT, a second reflecting element LF2, and the imaging surface IMG. The optical path travels along the first optical axis OA1 to the first reflecting surface RF1 of the first reflecting element LF1, and the first reflecting surface RF1 deflects the optical path from the first optical axis OA1 to the second optical axis OA2. The optical path then 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 then travels along the third optical axis OA3 to the imaging surface IMG. Figure 24 In this context, both the first reflecting element LF1 and the second reflecting element LF2 can be prisms. Figure 25 In this system, the first reflecting element LF1 and the second reflecting element LF2 can be a prism and a plane mirror, respectively.

[0099] In the imaging optical lens group disclosed in the present disclosure, the first lens group may not move relative to the reflecting surface during the zooming process or the focusing process. Thereby, the overall structure of the lens of the imaging optical lens group does not extend and contract toward the object side due to zooming or focusing, which helps to improve the operability and firmness of the lens, and can simplify the complexity of the optical design and mechanism.

[0100] In the imaging optical lens group disclosed in the present disclosure, the imaging surface may move along the optical axis direction during the zooming process or the focusing process. Thereby, whether it is zoom shooting or close-up focusing, focusing can be performed by moving the imaging surface along the optical axis direction, which helps to improve the light-gathering quality in various shooting states.

[0101] Half of the maximum viewing angle of the imaging optical lens group in the first state at the short focal end is HFOVSf, and half of the maximum viewing angle of the imaging optical lens group in the first state at the long focal end is HFOVLf, which can satisfy the following conditions: 1.20 < HFOVSf / HFOVLf < 2.50. Thereby, the optical zoom ratio can be increased, which helps to improve the shooting quality and shooting diversity in the medium and long focal length ranges. Among them, the following conditions can also be satisfied: 1.22 < HFOVSf / HFOVLf < 2.00. Among them, the following conditions can also be satisfied: 1.25 < HFOVSf / HFOVLf < 1.80. Among them, the following conditions can also be satisfied: 1.28 ≤ HFOVSf / HFOVLf ≤ 1.52.

[0102] The distance from the object-side surface of the lens closest to the object side in the first state at the short focal end of the imaging optical lens group to the imaging surface on the optical axis is TLSf, and the distance from the object-side surface of the lens closest to the object side in the first state at the long focal end of the imaging optical lens group to the imaging surface on the optical axis is TLLf, which can satisfy the following conditions: 0 ≤ 10 × |TLSf - TLLf| / TLSf < 1.00. Thereby, a relatively constant overall optical length can be maintained during the zooming and focusing processes, which helps to simplify the complexity of the mechanism design, facilitate lens assembly, and improve the qualified rate. Among them, the following conditions can also be satisfied: 0.01 < 10 × |TLSf - TLLf| / TLSf < 0.50. Among them, the following conditions can also be satisfied: 0.01 < 10 × |TLSf - TLLf| / TLSf < 0.30. Among them, the following conditions can also be satisfied: 0.01 < 10 × |TLSf - TLLf| / TLSf < 0.20. Among them, the following conditions can also be satisfied: 0.02 ≤ 10 × |TLSf - TLLf| / TLSf ≤ 0.15. In an embodiment, the lens closest to the object side in the imaging optical lens group may be the first lens.

[0103] The aperture value (F-number) of the imaging optical lens group in the first state at the short focal end is FnoSf, which satisfies the following conditions: 1.50 < FnoSf < 4.00. Thereby, the aperture value at the short focal end can be adjusted to balance the illuminance and the depth of field, and enhance the light input to improve the image quality. Among them, the following conditions can also be satisfied: 1.80 < FnoSf < 3.50. Among them, the following conditions can also be satisfied: 2.00 < FnoSf < 3.00.

[0104] The aperture value of the imaging optical lens group in the first state at the long focal end is FnoLf, which satisfies the following conditions: 1.80 < FnoLf < 4.50. Thereby, the aperture value at the long focal end can be adjusted to balance the illuminance and the depth of field, and enhance the light input to improve the image quality. Among them, the following conditions can also be satisfied: 2.00 < FnoLf < 4.20. Among them, the following conditions can also be satisfied: 2.50 < FnoLf < 3.80.

[0105] Half of the maximum viewing angle of the imaging optical lens group in the first state at the short focal end is HFOVSf, which satisfies the following conditions: 8.0 degrees < HFOVSf < 25.0 degrees. Thereby, the imaging optical lens group can have an appropriate viewing angle to match the application in the medium and long focal length range. Among them, the following conditions can also be satisfied: 12.0 degrees < HFOVSf < 22.0 degrees.

[0106] The distance from the object side surface of the lens closest to the object side in the first state at the short focal end of the imaging optical lens group to the imaging surface on the optical axis is TLSf, and the maximum imaging height of the imaging optical lens group (which can be half of the total length of the diagonal of the effective sensing area of the electronic photosensitive element) is ImgH, which satisfies the following conditions: 3.00 < TLSf / ImgH < 6.50. Thereby, the total length of the imaging optical lens group at the short focal end and the imaging height can be balanced to enhance the shooting experience of portrait photography and help highlight the subject of the photographed person. Among them, the following conditions can also be satisfied: 3.30 < TLSf / ImgH < 6.00.

[0107] The distance from the object side surface of the lens closest to the object side in the first state at the long focal end of the imaging optical lens group to the imaging surface on the optical axis is TLLf, and the maximum imaging height of the imaging optical lens group is ImgH, which satisfies the following conditions: 3.00 < TLLf / ImgH < 6.50. Thereby, the total length of the imaging optical lens group at the long focal end and the imaging height can be balanced to provide a shallow depth of field, which helps to blur the background in the distance and adjust the sense of distance of the scenery, etc. Among them, the following conditions can also be satisfied: 3.40 < TLLf / ImgH < 6.00.

[0108] The distance on the optical axis from the object-side surface of the lens closest to the object side in the first lens group to the image-side surface of the lens closest to the image side in the first lens group is TG1, and the distance on the optical axis from the object-side surface of the lens closest to the object side in the second lens group to the image-side surface of the lens closest to the image side in the second lens group is TG2, and the following conditions can be satisfied: 0.50 < TG1 / TG2 < 1.80. Thereby, the length of the first lens group on the optical axis and the length of the second lens group on the optical axis can be adjusted, which helps to balance the spatial arrangement of the lenses to reduce the sensitivity of the imaging optical lens group during the zooming process or the focusing process. Among them, the following conditions can also be satisfied: 0.65 < TG1 / TG2 < 1.60. In an embodiment, the lens closest to the object side in the first lens group can be the first lens, the lens closest to the image side in the first lens group can be the third lens, the lens closest to the object side in the second lens group can be the fourth lens, and the lens closest to the image side in the second lens group can be the sixth lens.

[0109] The distance on the optical axis from the object-side surface of the lens closest to the object side in the imaging optical lens group in the first short-focus state to the image-side surface of the lens closest to the image side is TDSf, the distance on the optical axis from the object-side surface of the lens closest to the object side in the imaging optical lens group in the first long-focus state to the image-side surface of the lens closest to the image side is TDLf, and the distance on the optical axis from the object-side surface of the lens closest to the object side in the imaging optical lens group in the first short-focus state to the imaging surface is TLSf, and the following conditions can be satisfied: 0.20 < (TDSf - TDLf) / TLSf < 0.70. Thereby, in the optical zoom covering the medium and long focal lengths, the imaging optical lens group helps to balance the movement amount of the lens group and the total optical length. Among them, the following conditions can also be satisfied: 0.30 < (TDSf - TDLf) / TLSf < 0.60. Among them, the following conditions can also be satisfied: 0.35 < (TDSf - TDLf) / TLSf < 0.55. In an embodiment, the lens closest to the object side in the imaging optical lens group can be the first lens, and the lens closest to the image side in the imaging optical lens group can be the sixth lens.

[0110] The total focal length of the imaging optical lens group in the first short-focus state is fSf, and the focal length of the first lens group is fG1, and the following conditions can be satisfied: 0.30 < fSf / fG1 < 2.00. Thereby, the refractive power of the first lens group can be adjusted to converge the light rays, which helps to control the shooting angle and increase the light intake at the same time. Among them, the following conditions can also be satisfied: 0.50 < fSf / fG1 < 1.50. Among them, the following conditions can also be satisfied: 0.70 < fSf / fG1 < 1.20.

[0111] The aperture value of the imaging optical lens group in the first state at the short focal length is FnoSf, and the aperture value of the imaging optical lens group in the second state at the short focal length is FnoSn, which can satisfy the following condition: 0.01 < 10 × |FnoSn - FnoSf| < 1.00. This allows for a balance between the amount of light entering the short focal length when shooting distant scenes and the amount of light entering the short focal length when shooting close-ups during focusing. It can also satisfy the following condition: 0.10 < 10 × |FnoSn - FnoSf| < 0.80. Furthermore, it can also satisfy the following condition: 0.30 < 10 × |FnoSn - FnoSf| < 0.60.

[0112] The aperture value of the imaging optical lens group in the first state at the telephoto end is FnoLf, and the aperture value in the second state at the telephoto end is FnoLn, which can satisfy the following condition: 0.01 < 10 × |FnoLn - FnoLf| < 1.00. This allows for a balance between the amount of light entering the telephoto end when shooting distant scenes and the amount of light entering the telephoto end when shooting close-ups during focusing. It can also satisfy the following condition: 0.05 < 10 × |FnoLn - FnoLf| < 0.80. Furthermore, it can also satisfy the following condition: 0.08 < 10 × |FnoLn - FnoLf| < 0.60.

[0113] In the first state at the short focal length end of the imaging optical lens group, the distance from the object-side surface of the lens closest to the object to the imaging plane on the optical axis is TLSf. In the second state at the short focal length end of the imaging optical lens group, the distance from the object-side surface of the lens closest to the object to the imaging plane on the optical axis is TLSn. The total focal length of the imaging optical lens group in the first state at the short focal length end is fSf, and the total focal length of the imaging optical lens group in the second state at the short focal length end is fSn. This satisfies the following condition: 0.10 < 10 × (TLSn / fSn - TLSf / fSf) < 0.80. Therefore, during focusing, a balance can be achieved between the ratio of the volume at the short focal length end to the angle of view when shooting distant scenes and the ratio of the volume at the short focal length end to the angle of view when shooting close-ups. This also satisfies the following condition: 0.15 < 10 × (TLSn / fSn - TLSf / fSf) < 0.50. The following condition can also be met: 0.18 < 10 × (TLSn / fSn - TLSf / fSf) < 0.30.

[0114] The distance from the object-side surface of the lens closest to the object side in the first state of the imaging optical lens group at the telephoto end to the imaging surface on the optical axis is TLLf, and the distance from the object-side surface of the lens closest to the object side in the second state of the imaging optical lens group at the telephoto end to the imaging surface on the optical axis is TLLn. The total focal length of the imaging optical lens group in the first state at the telephoto end is fLf, and the total focal length of the imaging optical lens group in the second state at the telephoto end is fLn. The following conditions can be satisfied: 0.10 < 10×(TLLn / fLn - TLLf / fLf) < 0.80. Thus, during the focusing process, a balance can be achieved between the ratio of the telephoto-end volume to the viewing angle when shooting a distant scene and the ratio of the telephoto-end volume to the viewing angle when shooting a close scene. Among them, the following conditions can also be satisfied: 0.15 < 10×(TLLn / fLn - TLLf / fLf) < 0.60. Among them, the following conditions can also be satisfied: 0.18 < 10×(TLLn / fLn - TLLf / fLf) < 0.45.

[0115] 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 thickness of the third lens on the optical axis is CT3, the distance between the first lens and the second lens on the optical axis is T12, and the distance between the second lens and the third lens on the optical axis is T23. The following conditions can be satisfied: 1.00 < (CT1 + CT2 + CT3) / (T12 + T23) < 4.50. Thus, the ratio of the total thickness of the lenses in the first lens group to the total lens spacing can be adjusted, which helps to balance the spatial configuration of the first lens group and increase the space utilization efficiency. Among them, the following conditions can also be satisfied: 1.50 < (CT1 + CT2 + CT3) / (T12 + T23) < 4.00.

[0116] The thickness of the first lens on the optical axis is CT1, and the thickness of the sixth lens on the optical axis is CT6. The following conditions can be satisfied: 2.50 < CT1 / CT6 < 8.00. Thus, the ratio of the central thickness of the first lens to the central thickness of the sixth lens can be controlled, which helps to take into account the process limitations of the first lens and reduce the volume of the imaging optical lens group by adjusting the central thickness of the sixth lens. Among them, the following conditions can also be satisfied: 3.50 < CT1 / CT6 < 6.50.

[0117] The total focal length of the imaging optical lens group in the first state at the short focal end is fSf, the focal length of the second lens is f2, the focal length of the fourth lens is f4, and the focal length of the fifth lens is f5. The following conditions can be satisfied: 0.01 < (|fSf / f4| + |fSf / f5|) / |fSf / f2| < 1.50. Thereby, the refractive power ratio of the second lens, the fourth lens, and the fifth lens can be adjusted. With the second lens having a strong light deflection ability and being balanced by the fourth lens and the fifth lens, it helps to balance the light convergence or light divergence of the two lens groups, and can improve the light condensing quality of the entire field of view. Among them, the following conditions can also be satisfied: 0.05 < (|fSf / f4| + |fSf / f5|) / |fSf / f2| < 1.00.

[0118] The displacement of the imaging surface during the process of the imaging optical lens group changing from the first state at the short focal end to the second state at the short focal end is DImgS, and the following conditions can be satisfied: 0.050 mm < DImgS < 0.800 mm. Thereby, whether it is zoom shooting or close-up focusing, the focus can be adjusted by moving the imaging surface along the optical axis direction, which helps to improve the light condensing quality in various shooting states. Among them, the following conditions can also be satisfied: 0.100 mm < DImgS < 0.600 mm. Among them, the following conditions can also be satisfied: 0.150 mm < DImgS < 0.500 mm. Among them, the following conditions can also be satisfied: 0.200 mm < DImgS < 0.400 mm.

[0119] The displacement of the imaging surface during the process of the imaging optical lens group changing from the first state at the short focal end to the second state at the short focal end is DImgS, and the minimum value of the thickness of a single lens on the optical axis among all the lenses of the imaging optical lens group is CTmin. The following conditions can be satisfied: 0.20 < DImgS / CTmin < 1.50. Thereby, the ratio of the imaging surface movement amount to the minimum lens thickness can be maintained, and the displacement of the electronic photosensitive element can be carried out under the limitation of the lens thickness process, which helps to improve the contrast and clarity of the image during zoom shooting or close-up focusing. Among them, the following conditions can also be satisfied: 0.30 < DImgS / CTmin < 1.00. Among them, the following conditions can also be satisfied: 0.45 < DImgS / CTmin < 0.80.

[0120] Each technical feature in the above-described imaging optical lens group disclosed by the present disclosure can be combined and configured to achieve the corresponding effects.

[0121] In the imaging optical lens assembly disclosed in this invention, the lens material can be glass or plastic. If the lens is made of glass, the freedom of refractive power configuration of the imaging optical lens assembly can be increased, and the influence of external environmental temperature changes on imaging can be reduced. Glass lenses can be manufactured using techniques such as grinding or molding. If the lens material is plastic, production costs can be effectively reduced. Furthermore, spherical or aspherical (ASP) surfaces can be incorporated into the lens surface. Spherical lenses reduce manufacturing difficulty, while aspherical surfaces provide more controllable variables to reduce aberrations, decrease the number of lenses, and effectively reduce the overall length of the imaging optical lens assembly disclosed in this invention. Further, aspherical surfaces can be manufactured using methods such as plastic injection molding or molding glass lenses.

[0122] In the imaging optical lens group disclosed in this disclosure, if the lens surface is aspherical, it means that all or part of the optically effective area of ​​the lens surface is aspherical.

[0123] In the imaging optical lens assembly disclosed herein, additives can be selectively added to any (or more) lens materials to produce light absorption or interference effects, thereby altering the lens's transmittance for specific wavelengths of light and reducing stray light and color shift. For example, the additives may filter out light in the 600 nm to 800 nm wavelength range to help reduce excess red or infrared light; or they may filter out light in the 350 nm to 450 nm wavelength range to reduce excess blue or ultraviolet light. Therefore, the additives can prevent specific wavelengths of light from interfering with imaging. Furthermore, the additives can be uniformly mixed into a plastic material and manufactured into a lens using injection molding technology. Additionally, the additives can also be deposited on the lens surface as a coating to provide the aforementioned effects.

[0124] In the imaging optical lens assembly disclosed herein, if the lens surface is convex and the position of the convex surface is not defined, it means that the convex surface can be located near the optical axis of the lens surface; if the lens surface is concave and the position of the concave surface is not defined, it means that the concave surface can be located near the optical axis of the lens surface. If the refractive power or focal length of the lens is not defined in its region, it means that the refractive power or focal length of the lens can be the refractive power or focal length of the lens near the optical axis.

[0125] In the imaging optical lens assembly 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.

[0126] In the imaging optical lens group disclosed in this disclosure, the imaging surface of the imaging optical lens group can be a plane or a curved surface with any curvature, depending on the corresponding electronic photosensitive element, especially a curved surface with a concave surface facing the object side.

[0127] In the imaging optical lens assembly disclosed herein, one or more imaging correction elements (such as planar elements) can be selectively disposed between the lens closest to the imaging plane and the imaging plane in the imaging optical path to achieve the effect of correcting image curvature (such as image distortion). The optical properties of the imaging correction element, such as curvature, thickness, refractive index, position, and surface type (convex or concave, spherical or aspherical, diffractive surface, and Fresnel surface, etc.), can be adjusted according to the requirements of the imaging device. Generally, a preferred configuration of the imaging correction element is to place a thin plano-concave element with a concave surface in the object-side direction close to the imaging plane.

[0128] The imaging optical lens group disclosed herein may be provided with at least one aperture stop, which may be located before the first lens, between the lenses, or after the last lens. The aperture stop may be of the type such as a glare stop or a field stop, which can be used to reduce stray light and help improve image quality.

[0129] In the imaging optical lens assembly disclosed in this invention, the aperture can be configured as a front aperture or a central aperture. A front aperture means the aperture is positioned between the subject and the first lens, while a central aperture means the aperture is positioned between the first lens and the imaging plane. A front aperture allows for a longer distance between the exit pupil and the imaging plane, resulting in a telecentric effect and increasing the efficiency of image reception by the CCD or CMOS sensor. A central aperture helps to expand the field of view of the imaging optical lens assembly.

[0130] This disclosure may appropriately incorporate a variable aperture element, which can be a mechanical component or a light-regulating element, capable of electrically or signal-controlled aperture size and shape. The mechanical component may include movable parts such as blade assemblies or shielding plates; the light-regulating element may include shielding materials such as filter elements, electrochromic materials, or liquid crystal layers. The variable aperture element can enhance image adjustment capabilities by controlling the amount of light entering the image or the exposure time. Furthermore, the variable aperture element can also be the aperture of this disclosure, allowing adjustment of image quality, such as depth of field or exposure speed, by changing the aperture value.

[0131] This disclosure allows for the appropriate placement of one or more optical elements to restrict the passage of light through the imaging optical lens assembly. These optical elements may be filters, polarizers, etc., but this disclosure is not limited thereto. Furthermore, the optical elements may be monolithic elements, composite components, or thin films, but this disclosure is not limited thereto. The optical elements can be placed between the object end, image end, or lenses of the imaging optical lens assembly to control the passage of specific types of light, thereby meeting application requirements.

[0132] The imaging optical lens assembly disclosed herein may include at least one optical lens, optical element, or carrier, at least one surface of which has a low-reflection layer. This low-reflection layer effectively reduces stray light generated by reflection at the interface. The low-reflection layer may be disposed in a non-effective 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.

[0133] The imaging optical lens assembly disclosed herein may further include a light-shielding element. The opening of the light-shielding element may be non-circular, and the non-circular opening may have different effective radii in different directions perpendicular to the optical axis. This allows for the use of a non-circular lens or aperture, effectively saving space and fully utilizing the light passing through the non-circular lens or aperture, thus helping to reduce stray light. The periphery of the inner hole of the light-shielding element may contain a wavy or serrated structure.

[0134] In the imaging optical lens assembly disclosed herein, the object side and image side are determined according to the optical axis direction, and the data on the optical axis are calculated along the optical axis. Furthermore, if the optical axis is deflected by an optical path deflection element, the data on the optical axis are also calculated along the optical axis.

[0135] Based on the above implementation methods, specific embodiments are presented below and described in detail with reference to the accompanying drawings.

[0136] <First Embodiment>

[0137] 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 at the short focal length end and a first state at the long focal length end. Figure 2From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the imaging device of the first embodiment in the first state at the short focal length end. 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 first state at the telephoto end. Figure 1 The upper part is a schematic diagram of the imaging optical lens group in the first state at the short focal length end, while Figure 1 The lower half is a schematic diagram of the imaging optical lens group in its first state at the telephoto end. Figure 1 As can be seen, the imaging device 1 includes an imaging optical lens group (not otherwise labeled) and an electronic photosensitive element IS. The imaging optical lens group, along the optical path from the object side to the image side, sequentially includes a reflective element LF, an aperture stop S1, a first lens E1, a second lens E2, an aperture ST, a third lens E3, an aperture stop S2, an aperture stop S3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter element E7, and an imaging surface IMG. Further, the imaging optical lens group, along the optical path from the object side to the image side, has a first lens group G1 and a second lens group G2, wherein the first lens group G1 includes the first lens E1, the second lens E2, and the third lens E3, and the second lens group G2 includes the fourth lens E4, the fifth lens E5, and the sixth lens E6. The first lens group G1 has positive refractive power. The electronic photosensitive element IS is disposed on the imaging surface IMG. The imaging optical lens group consists of six lenses (E1, E2, E3, E4, E5, E6), and there are no other interposed lenses between each lens.

[0138] The imaging optical lens group has a first state corresponding to an infinity object distance and a second state corresponding to a finite object distance. The first state is the state of the imaging optical lens group when the subject is at infinity (infinity object distance), and the second state is the state of the imaging optical lens group when the subject is at a finite object distance (finite object distance). When the subject moves from infinity to a finite object distance, the imaging optical lens group performs a focusing process to change from the first state to the second state. Conversely, when the subject moves from a finite object distance to infinity, the imaging optical lens group also performs a focusing process to change from the second state to the first state. During the focusing process, the first lens group G1 does not move relative to the reflecting surface of the reflecting element LF, the second lens group G2 moves relative to the first lens group G1 along the optical axis, and the imaging plane IMG moves along the optical axis. It is worth noting that during the focusing process, the individual lenses in either lens group do not move relative to each other.

[0139] When the image-capturing optical lens group is in the first state, it has a telephoto first state corresponding to the telephoto end and a short focal length first state corresponding to the short focal length end during zooming. Specifically, when the image-capturing optical lens group transitions from the telephoto first state to the short focal length first state during zooming, the second lens group G2 moves relative to the first lens group G1 along the optical axis toward the image side. Conversely, when the image-capturing optical lens group transitions from the short focal length first state to the telephoto first state during zooming, the second lens group G2 moves relative to the first lens group G1 along the optical axis toward the object side. For example... Figure 1 As shown, Figure 1 The upper part is the imaging optical lens group in its first state at the short focal length end, while... Figure 1 The lower half represents the imaging optical lens group in its first state at the telephoto end. Similarly, when the imaging optical lens group is in its second state, it has both a telephoto-end second state corresponding to the telephoto end and a short-focal-end second state corresponding to the short-focal-end during zooming. During zooming, the first lens group G1 does not move relative to the reflecting surface of the reflecting element LF, the second lens group G2 moves relative to the first lens group G1 along the optical axis, and the imaging plane IMG moves along the optical axis. It is noteworthy that during zooming, the individual lenses within either lens group do not move relative to each other. Please note... Figure 1 The lower half of the imaging optical lens group in the first state at the telephoto end only shows the optically effective area, so some components that are not in the optically effective area have been omitted, such as the peripheral areas of aperture S3 or fourth lens E4 to sixth lens E6.

[0140] 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 object-side surface has an inflection point off-axis.

[0141] 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 two inflection points off-axis, its image-side surface has one inflection point off-axis, and its object-side surface has one concave critical point off-axis.

[0142] The third lens E3 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical. Its object-side surface has two inflection points off-axis, its image-side surface has one inflection point off-axis, and its object-side surface has one concave critical point off-axis.

[0143] 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 a point of inflection off-axis, its image-side surface has a point of inflection off-axis, and its image-side surface has a critical point of convexity off-axis.

[0144] The fifth lens E5 has positive refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical. Its object-side surface has two inflection points off-axis, and its image-side surface has two inflection points off-axis. Its object-side surface has one convex critical point and one concave critical point off-axis, and its image-side surface has one concave critical point off-axis.

[0145] The sixth lens E6 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical. Its object-side surface has four inflection points off-axis, its image-side surface has four inflection points off-axis, its object-side surface has a concave critical point off-axis, and its image-side surface has a convex critical point off-axis.

[0146] The reflective element LF is made of glass and is positioned between the object and the first lens group G1 (or, more accurately, on the object side of the first lens E1), without affecting the focal length of the imaging optical lens group. The reflective element LF is a prism, serving as a light path deflector. For ease of explanation, Figure 1 The deflection effect of the reflective element LF on the optical path is omitted from the drawing. Both the object-side and image-side surfaces of the reflective element LF are planar, but this is not a limitation. The reflective element LF can have various forms depending on actual design requirements, thus causing different deflection effects on the optical path. For example, the reflective element LF can be as follows: Figures 21 to 23 As shown, it provides one optical path reversal. The reflective element LF uses the reflective surface RF1 to revert the optical axis OA1 to the optical axis OA2, as can be seen from the previous description. Figures 21 to 23 The relevant explanations will not be repeated here.

[0147] The filter element E7 is made of glass and is located between the sixth lens E6 and the imaging plane IMG. It does not affect the focal length of the imaging optical lens group.

[0148] The equations for the aspherical surfaces of the above lenses are expressed as follows:

[0149]

[0150] 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;

[0151] Y: The perpendicular distance between a point on the aspherical curve and the optical axis;

[0152] R: Radius of curvature;

[0153] k: cone coefficient; and

[0154] Ai: The i-th order aspherical coefficient.

[0155] In the imaging optical lens group of the first embodiment, the first lens E1 is the lens closest to the object side and the lens closest to the object side in the first lens group G1, the third lens E3 is the lens closest to the image side in the first lens group G1, the fourth lens E4 is the lens closest to the object side in the second lens group G2, and the sixth lens E6 is the lens closest to the image side and the lens closest to the image side in the second lens group G2.

[0156] The total focal length of the imaging optical lens group in the first state at the short focal length end is fSf, the aperture value of the imaging optical lens group in the first state at the short focal length end is FnoSf, half of the maximum angle of view of the imaging optical lens group in the first state at the short focal length end is HFOVSf, the distance on the optical axis from the object-side surface of the lens closest to the object side to the imaging plane in the first state at the short focal length end is TLSf, 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 in the first state at the short focal length end is TDSf, which satisfies the following conditions: fSf = 19.61 mm; FnoSf = 2.38; HFOVSf = 16.0 degrees; TLSf = 23.187 mm; and TDSf = 21.389 mm. In this embodiment, TLSf is the distance on the optical axis from the object-side surface of the first lens E1 to the imaging surface IMG in the first state at the short focal length end of the imaging optical lens group, and TDSf is the distance on the optical axis from the object-side surface of the first lens E1 to the image-side surface of the sixth lens E6 in the first state at the short focal length end of the imaging optical lens group.

[0157] The total focal length of the imaging optical lens group in the first state at the telephoto end is fLf, the aperture value of the imaging optical lens group in the first state at the telephoto end is FnoLf, half of the maximum angle of view of the imaging optical lens group in the first state at the telephoto end is HFOVLf, the distance on the optical axis from the object-side surface of the lens closest to the object side to the imaging plane in the first state at the telephoto end is TLLf, 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 in the first state at the telephoto end is TDLf, which satisfies the following conditions: fLf = 22.77 mm; FnoLf = 2.76; HFOVLf = 12.5 degrees; TLLf = 23.228 mm; and TDLf = 12.985 mm. In this embodiment, TLLf is the distance on the optical axis from the object-side surface of the first lens E1 to the imaging surface IMG in the first state at the telephoto end of the imaging optical lens group, and TDLf is the distance on the optical axis from the object-side surface of the first lens E1 to the image-side surface of the sixth lens E6 in the first state at the telephoto end of the imaging optical lens group.

[0158] The total focal length of the imaging optical lens group in the second state at the short focal length end is fSn, the aperture value of the imaging optical lens group in the second state at the short focal length end is FnoSn, half of the maximum angle of view of the imaging optical lens group in the second state at the short focal length end is HFOVSn, the distance on the optical axis from the object-side surface of the lens closest to the object side to the imaging plane in the second state at the short focal length end is TLSn, 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 in the second state at the short focal length end is TDSn, which satisfies the following conditions: fSn = 19.51 mm; FnoSn = 2.42; HFOVSn = 15.8 degrees; TLSn = 23.482 mm; and TDSn = 21.687 mm. In this embodiment, TLSn is the distance on the optical axis from the object-side surface of the first lens E1 to the imaging surface IMG in the second state at the short focal length end of the imaging optical lens group, and TDSn is the distance on the optical axis from the object-side surface of the first lens E1 to the image-side surface of the sixth lens E6 in the second state at the short focal length end of the imaging optical lens group.

[0159] The total focal length of the imaging optical lens group in the second state at the telephoto end is fLn, the aperture value of the imaging optical lens group in the second state at the telephoto end is FnoLn, half of the maximum angle of view of the imaging optical lens group in the second state at the telephoto end is HFOVLn, the distance on the optical axis from the object-side surface of the lens closest to the object side to the imaging plane in the second state at the telephoto end is TLLn, 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 in the second state at the telephoto end is TDLn, which satisfies the following conditions: fLn = 22.57 mm; FnoLn = 2.80; HFOVLn = 12.3 degrees; TLLn = 23.232 mm; and TDLn = 13.455 mm. In this embodiment, TLLn is the distance on the optical axis from the object-side surface of the first lens E1 to the imaging surface IMG in the second state at the telephoto end of the imaging optical lens group, and TDLn is the distance on the optical axis from the object-side surface of the first lens E1 to the image-side surface of the sixth lens E6 in the second state at the telephoto end of the imaging optical lens group.

[0160] In this embodiment, D0 is the distance on the optical axis between the subject and the object-side surface of the reflecting element LF (approximately equivalent to the object distance of the imaging optical lens group), D1 is the distance on the optical axis between aperture S2 and aperture S3, D2 is the distance on the optical axis between the image-side surface of the sixth lens E6 and the filter element E7, and D3 is the movement distance of the imaging plane IMG on the optical axis, wherein the movement distance is compared with the imaging optical lens group in the first state at the short focal length end. When the imaging optical lens group is in the first state at the short focal length end, the first state at the long focal length end, the second state at the short focal length end, and the second state at the long focal length end through the zoom process or focusing process, the object distance of the imaging optical lens group will be different from the values ​​of D0 to D3. When the imaging optical lens group is in the first state at the short focal length end, it satisfies the following conditions: object distance = ∞ (infinity); D0 = ∞; D1 = 9.921 mm; D2 = 1.433 mm; and D3 = 0.000 mm. When the imaging optical lens group is in the first state at the telephoto end, it satisfies the following conditions: object distance = ∞; D0 = ∞; D1 = 1.517 mm; D2 = 9.837 mm; and D3 = 0.041 mm. When the imaging optical lens group is in the second state at the short focal length end, it satisfies the following conditions: object distance = 1510.278 mm; D0 = 1500.050 mm; D1 = 10.219 mm; D2 = 1.135 mm; and D3 = 0.295 mm. When the imaging optical lens group is in the second state at the telephoto end, it satisfies the following conditions: object distance = 1510.278 mm; D0 = 1500.050 mm; D1 = 1.987 mm; D2 = 9.367 mm; and D3 = 0.295 mm.

[0161] The maximum angle of view of the imaging optical lens group in the first state at the short focal length end is half of HFOVSf, and the maximum angle of view of the imaging optical lens group in the first state at the long focal length end is half of HFOVLf, which satisfies the following condition: HFOVSf / HFOVLf=1.28.

[0162] The distance from the object-side surface of the lens closest to the object side (first lens E1) in the first state at the short focal length of the imaging optical lens group to the imaging plane IMG on the optical axis is TLSf. The distance from the object-side surface of the lens closest to the object side (first lens E1) in the first state at the long focal length of the imaging optical lens group to the imaging plane IMG on the optical axis is TLLf. They satisfy the following condition: 10×|TLSf-TLLf| / TLSf=0.02.

[0163] The distance on the optical axis from the object-side surface of the lens closest to the object side (first lens E1) in the first state at the short focal length of the imaging optical lens group to the image-side surface of the lens closest to the image side (sixth lens E6) is TDSf. The distance on the optical axis from the object-side surface of the lens closest to the object side (first lens E1) in the first state at the long focal length of the imaging optical lens group to the image-side surface of the lens closest to the image side (sixth lens E6) is TDLf. The distance on the optical axis from the object-side surface of the lens closest to the object side (first lens E1) in the first state at the short focal length of the imaging optical lens group to the imaging plane IMG is TLSf. These conditions satisfy the following condition: (TDSf-TDLf) / TLSf=0.36.

[0164] The distance from the object-side surface of the lens closest to the object side (first lens E1) in the first state at the short focal length of the imaging optical lens group to the imaging plane IMG on the optical axis is TLSf, and the maximum imaging height of the imaging optical lens group is ImgH, which satisfies the following condition: TLSf / ImgH=4.42.

[0165] The distance from the object-side surface of the first lens (first lens E1) of the imaging optical lens group to the imaging plane IMG on the optical axis is TLLf, and the maximum imaging height of the imaging optical lens group is ImgH, which satisfies the following condition: TLLf / ImgH=4.42.

[0166] The total focal length of the imaging optical lens group in the first state at the short focal length end is fSf, and the focal length of the first lens group G1 is fG1, which satisfies the following condition: fSf / fG1=0.93.

[0167] The distance from the object-side surface of the lens closest to the object side in the first lens group G1 (first lens E1) to the image-side surface of the lens closest to the image side in the first lens group G1 (third lens E3) on the optical axis is TG1. The distance from the object-side surface of the lens closest to the object side in the second lens group G2 (fourth lens E4) to the image-side surface of the lens closest to the image side in the second lens group G2 (sixth lens E6) on the optical axis is TG2. They satisfy the following condition: TG1 / TG2=1.45.

[0168] The aperture value of the imaging optical lens group in the first state at the short focal length end is FnoSf, and the aperture value of the imaging optical lens group in the second state at the short focal length end is FnoSn, which satisfies the following condition: 10×|FnoSn-FnoSf|=0.40.

[0169] The aperture value of the imaging optical lens group in the first state at the telephoto end is FnoLf, and the aperture value of the imaging optical lens group in the second state at the telephoto end is FnoLn, which satisfies the following condition: 10×|FnoLn-FnoLf|=0.40.

[0170] The distance from the object-side surface of the lens closest to the object side (first lens E1) in the first state at the short focal length of the imaging optical lens group to the imaging plane IMG on the optical axis is TLSf. The distance from the object-side surface of the lens closest to the object side (first lens E1) in the second state at the short focal length of the imaging optical lens group to the imaging plane IMG on the optical axis is TLSn. The total focal length of the imaging optical lens group in the first state at the short focal length is fSf, and the total focal length of the imaging optical lens group in the second state at the short focal length is fSn. They satisfy the following condition: 10×(TLSn / fSn-TLSf / fSf)=0.21.

[0171] The distance from the object-side surface of the lens closest to the object side (first lens E1) in the first state at the telephoto end of the imaging optical lens group to the imaging plane IMG on the optical axis is TLLf. The distance from the object-side surface of the lens closest to the object side (first lens E1) in the second state at the telephoto end of the imaging optical lens group to the imaging plane IMG on the optical axis is TLLn. The total focal length of the imaging optical lens group in the first state at the telephoto end is fLf, and the total focal length of the imaging optical lens group in the second state at the telephoto end is fLn. They satisfy the following condition: 10×(TLLn / fLn-TLLf / fLf)=0.20.

[0172] The total focal length of the imaging optical lens group in the first state at the short focal length end is fSf, the focal length of the second lens E2 is f2, the focal length of the fourth lens E4 is f4, and the focal length of the fifth lens E5 is f5, which satisfies the following condition: (|fSf / f4|+|fSf / f5|) / |fSf / f2|=0.59.

[0173] The thickness of the first lens E1 on the optical axis is CT1, and the thickness of the sixth lens E6 on the optical axis is CT6, which satisfies the following condition: CT1 / CT6 = 5.79.

[0174] The thickness of the first lens E1 along the optical axis is CT1, the thickness of the second lens E2 along the optical axis is CT2, and the thickness of the third lens E3 along the optical axis is CT3. The distance between the first lens E1 and the second lens E2 along the optical axis is T12, and the distance between the second lens E2 and the third lens E3 along the optical axis is T23. This satisfies the following condition: (CT1+CT2+CT3) / (T12+T23)=2.46. In this embodiment, the distance between two adjacent lenses along the optical axis refers to the distance between two adjacent mirror surfaces of the two adjacent lenses along the optical axis.

[0175] The displacement of the imaging plane IMG during the transition of the imaging optical lens group from the first state at the short focal length end to the second state at the short focal length end is DImgS, which satisfies the following condition: DImgS = 0.295 mm.

[0176] The displacement of the imaging plane IMG during the transition from the first short focal length state to the second short focal length state of the imaging optical lens group is denoted as DImgS. The minimum thickness of a single lens on the optical axis among all lenses in the imaging optical lens group is CTmin, which satisfies the following condition: DImgS / CTmin = 0.59. In this embodiment, among the first lens E1 to the sixth lens E6, the thickness of the sixth lens E6 on the optical axis is less than the thickness of the other lenses on the optical axis; therefore, CTmin is equal to the thickness of the sixth lens E6 on the optical axis.

[0177] Please refer to Tables 1A to 1C below.

[0178]

[0179]

[0180] Table 1A contains detailed structural data for the first embodiment, where the units for radius of curvature, thickness, and focal length are millimeters (mm), and surfaces 0 to 21 sequentially represent the surfaces along the optical axis from the object side to the image side.

[0181]

[0182]

[0183] Table 1B contains parameters for the imaging optical lens group in the first state at the short focal length, the first state at the long focal length, the second state at the short focal length, and the second state at the long focal length under different focusing and zoom conditions. It should be understood that this embodiment only discloses two focusing states, such as the first state and the second state, but this disclosure is not limited to the disclosed states. Furthermore, the imaging optical lens group in this embodiment may have other focusing states with different focal lengths between the first and second states, in addition to the first and second states, to correspond to focusing states with other different object distances.

[0184] As shown in Table 1B, the second lens group G2 moves relative to the first lens group G1 along the optical axis during the focusing and zooming processes.

[0185]

[0186]

[0187]

[0188] Table 1C shows the aspherical data in the first embodiment, where k is the conical coefficient in the aspherical curve equation, and A4 to A30 represent the 4th to 30th order aspherical coefficients of each surface.

[0189] In addition, the tables in the following embodiments are schematic diagrams and aberration curves corresponding to each embodiment. The definitions of the data in the tables are the same as those in Tables 1A to 1C of the first embodiment, and will not be repeated here.

[0190] <Second Embodiment>

[0191] 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 at the short focal length end and a first state at the long focal length end. Figure 5 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the second embodiment in the first state at the short focal length end. 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 first state at the telephoto end. Figure 4 The upper part is a schematic diagram of the imaging optical lens group in the first state at the short focal length end, while Figure 4 The lower half is a schematic diagram of the imaging optical lens group in its first state at the telephoto end. Figure 4It is known that the imaging device 2 includes an imaging optical lens group (not otherwise labeled) and an electronic photosensitive element IS. The imaging optical lens group, along the optical path from the object side to the image side, sequentially includes a reflective element LF, a first lens E1, a second lens E2, an aperture ST, a third lens E3, an aperture stop S1, an aperture stop S2, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter element E7, and an imaging surface IMG. Furthermore, the imaging optical lens group, along the optical path from the object side to the image side, has a first lens group G1 and a second lens group G2, wherein the first lens group G1 includes the first lens E1, the second lens E2, and the third lens E3, and the second lens group G2 includes the fourth lens E4, the fifth lens E5, and the sixth lens E6. The first lens group G1 has positive refractive power. The electronic photosensitive element IS is disposed on the imaging surface IMG. The imaging optical lens group consists of six lenses (E1, E2, E3, E4, E5, E6), and there are no other interposed lenses between each lens.

[0192] The imaging optical lens group has a first state corresponding to an infinity object distance and a second state corresponding to a finite object distance. The first state is the state of the imaging optical lens group when the subject is at infinity (infinity object distance), and the second state is the state of the imaging optical lens group when the subject is at a finite object distance (finite object distance). When the subject moves from infinity to a finite object distance, the imaging optical lens group performs a focusing process to change from the first state to the second state. Conversely, when the subject moves from a finite object distance to infinity, the imaging optical lens group also performs a focusing process to change from the second state to the first state. During the focusing process, the first lens group G1 does not move relative to the reflecting surface of the reflecting element LF, the second lens group G2 moves relative to the first lens group G1 along the optical axis, and the imaging plane IMG moves along the optical axis. It is worth noting that during the focusing process, the individual lenses in either lens group do not move relative to each other.

[0193] When the image-capturing optical lens group is in the first state, it has a telephoto first state corresponding to the telephoto end and a short focal length first state corresponding to the short focal length end during zooming. Specifically, when the image-capturing optical lens group transitions from the telephoto first state to the short focal length first state during zooming, the second lens group G2 moves relative to the first lens group G1 along the optical axis toward the image side. Conversely, when the image-capturing optical lens group transitions from the short focal length first state to the telephoto first state during zooming, the second lens group G2 moves relative to the first lens group G1 along the optical axis toward the object side. For example... Figure 4 As shown, Figure 4 The upper part is the imaging optical lens group in its first state at the short focal length end, while... Figure 4The lower half represents the imaging optical lens group in its first state at the telephoto end. Similarly, when the imaging optical lens group is in its second state, it has both a telephoto-end second state corresponding to the telephoto end and a short-focal-end second state corresponding to the short-focal-end during zooming. During zooming, the first lens group G1 does not move relative to the reflecting surface of the reflecting element LF, the second lens group G2 moves relative to the first lens group G1 along the optical axis, and the imaging plane IMG moves along the optical axis. It is noteworthy that during zooming, the individual lenses within either lens group do not move relative to each other. Please note... Figure 4 The lower half of the imaging optical lens group in the first state at the telephoto end only shows the optically effective area, so some components that are not in the optically effective area have been omitted, such as the peripheral areas of the aperture stop S2 or the fourth lens E4 to the sixth lens E6.

[0194] 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 object-side surface has a recurve point off-axis, and its image-side surface has three recurve points off-axis. Its object-side surface has a concave critical point off-axis, and its image-side surface has a convex critical point and a concave critical point off-axis.

[0195] 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 two inflection points off-axis, and its image-side surface has two inflection points off-axis. Its object-side surface has a concave critical point off-axis, and its image-side surface has a convex critical point off-axis.

[0196] The third lens E3 has positive refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical. Its object-side surface has a point of inflection off-axis, its image-side surface has a point of inflection off-axis, its object-side surface has a convex critical point off-axis, and its image-side surface has a concave critical point off-axis.

[0197] The fourth lens E4 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has a point of inflection off-axis, its image-side surface has a point of inflection off-axis, and its image-side surface has a critical point of convexity off-axis.

[0198] The fifth lens E5 has positive refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical. Its object-side surface has two inflection points off-axis, and its image-side surface has two inflection points off-axis. Its object-side surface has one convex critical point and one concave critical point off-axis, and its image-side surface has one convex critical point and one concave critical point off-axis.

[0199] The sixth lens E6 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 four inflection points off-axis, and its image-side surface has two inflection points off-axis. Its object-side surface has one convex critical point off-axis, and its image-side surface has one convex critical point and one concave critical point off-axis.

[0200] The reflective element LF is made of glass and is positioned between the object and the first lens group G1 (or, more accurately, on the object side of the first lens E1), without affecting the focal length of the imaging optical lens group. The reflective element LF is a prism, serving as a light path deflector. For ease of explanation, Figure 4 The deflection effect of the reflective element LF on the optical path is omitted from the drawing. Both the object-side and image-side surfaces of the reflective element LF are planar, but this is not a limitation. The reflective element LF can have various forms depending on actual design requirements, thus causing different deflection effects on the optical path. For example, the reflective element LF can be as follows: Figures 21 to 23 As shown, it provides one optical path reversal. The reflective element LF uses the reflective surface RF1 to revert the optical axis OA1 to the optical axis OA2, as can be seen from the previous description. Figures 21 to 23 The relevant explanations will not be repeated here.

[0201] The filter element E7 is made of glass and is located between the sixth lens E6 and the imaging plane IMG. It does not affect the focal length of the imaging optical lens group.

[0202] Please refer to Tables 2A to 2D below.

[0203]

[0204]

[0205]

[0206] The definitions in Table 2B are the same as those in the first embodiment. Furthermore, in addition to the first and second states, the imaging optical lens group of this embodiment can also have other focusing states with different focal lengths between the first and second states, corresponding to focusing states with other different object distances.

[0207] As shown in Table 2B, the second lens group G2 moves relative to the first lens group G1 along the optical axis during the focusing and zooming processes.

[0208]

[0209]

[0210]

[0211] The equations for the aspherical curves in Table 2C are represented in the form of the first embodiment.

[0212]

[0213] The definitions described in Table 2D are the same as those in the first embodiment.

[0214] <Third Embodiment>

[0215] 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 at the short focal length end and a first state at the long focal length end. Figure 8 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the third embodiment in the first state at the short focal length end. 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 first state at the telephoto end. Figure 7 The upper part is a schematic diagram of the imaging optical lens group in the first state at the short focal length end, while Figure 7 The lower half is a schematic diagram of the imaging optical lens group in its first state at the telephoto end. Figure 7 It is known that the image capturing device 3 includes an image capturing optical lens group (not otherwise labeled) and an electronic photosensitive element IS. The image capturing optical lens group, along the optical path from the object side to the image side, sequentially includes a reflective element LF, an aperture stop S1, a first lens E1, a second lens E2, an aperture ST, a third lens E3, an aperture stop S2, an aperture stop S3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter element E7, and an imaging surface IMG. Furthermore, the image capturing optical lens group, along the optical path from the object side to the image side, has a first lens group G1 and a second lens group G2, wherein the first lens group G1 includes the first lens E1, the second lens E2, and the third lens E3, and the second lens group G2 includes the fourth lens E4, the fifth lens E5, and the sixth lens E6. The first lens group G1 has positive refractive power. The electronic photosensitive element IS is disposed on the imaging surface IMG. The imaging optical lens group consists of six lenses (E1, E2, E3, E4, E5, E6), and there are no other interposed lenses between each lens.

[0216] The imaging optical lens group has a first state corresponding to an infinity object distance and a second state corresponding to a finite object distance. The first state is the state of the imaging optical lens group when the subject is at infinity (infinity object distance), and the second state is the state of the imaging optical lens group when the subject is at a finite object distance (finite object distance). When the subject moves from infinity to a finite object distance, the imaging optical lens group performs a focusing process to change from the first state to the second state. Conversely, when the subject moves from a finite object distance to infinity, the imaging optical lens group also performs a focusing process to change from the second state to the first state. During the focusing process, the first lens group G1 does not move relative to the reflecting surface of the reflecting element LF, the second lens group G2 moves relative to the first lens group G1 along the optical axis, and the imaging plane IMG moves along the optical axis. It is worth noting that during the focusing process, the individual lenses in either lens group do not move relative to each other.

[0217] When the image-capturing optical lens group is in the first state, it has a telephoto first state corresponding to the telephoto end and a short focal length first state corresponding to the short focal length end during zooming. Specifically, when the image-capturing optical lens group transitions from the telephoto first state to the short focal length first state during zooming, the second lens group G2 moves relative to the first lens group G1 along the optical axis toward the image side. Conversely, when the image-capturing optical lens group transitions from the short focal length first state to the telephoto first state during zooming, the second lens group G2 moves relative to the first lens group G1 along the optical axis toward the object side. For example... Figure 7 As shown, Figure 7 The upper part is the imaging optical lens group in its first state at the short focal length end, while... Figure 7 The lower half represents the imaging optical lens group in its first state at the telephoto end. Similarly, when the imaging optical lens group is in its second state, it has both a telephoto-end second state corresponding to the telephoto end and a short-focal-end second state corresponding to the short-focal-end during zooming. During zooming, the first lens group G1 does not move relative to the reflecting surface of the reflecting element LF, the second lens group G2 moves relative to the first lens group G1 along the optical axis, and the imaging plane IMG moves along the optical axis. It is noteworthy that during zooming, the individual lenses within either lens group do not move relative to each other. Please note... Figure 7 The lower half of the imaging optical lens group in the first state at the telephoto end only shows the optically effective area, so some components that are not in the optically effective area have been omitted, such as the peripheral areas of aperture S3 or fourth lens E4 to sixth lens E6.

[0218] The first lens E1 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has a point of inflection off-axis, its image-side surface has a point of inflection off-axis, and its image-side surface has a point of convexity off-axis.

[0219] 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 a point of inflection off-axis, its image-side surface has a point of inflection off-axis, and its object-side surface has a concave critical point off-axis.

[0220] The third lens E3 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical. Its image-side surface has a point of inflection off-axis and a point of concavity off-axis.

[0221] The fourth lens E4 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has two inflection points off-axis, its image-side surface has four inflection points off-axis, and its image-side surface has a convex critical point off-axis.

[0222] The fifth lens E5 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 four inflection points off-axis, and its image-side surface has two inflection points off-axis. Its object-side surface has two convex critical points and two concave critical points off-axis, and its image-side surface has one convex critical point off-axis.

[0223] The sixth lens E6 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical. Its object-side surface has two inflection points off-axis, and its image-side surface has two inflection points off-axis. Its object-side surface has a concave critical point off-axis, and its image-side surface has a convex critical point and a concave critical point off-axis.

[0224] The reflective element LF is made of glass and is positioned between the object and the first lens group G1 (or, more accurately, on the object side of the first lens E1), without affecting the focal length of the imaging optical lens group. The reflective element LF is a prism, serving as a light path deflector. For ease of explanation, Figure 7The deflection effect of the reflective element LF on the optical path is omitted from the drawing. Both the object-side and image-side surfaces of the reflective element LF are planar, but this is not a limitation. The reflective element LF can have various forms depending on actual design requirements, thus causing different deflection effects on the optical path. For example, the reflective element LF can be as follows: Figures 21 to 23 As shown, it provides one optical path reversal. The reflective element LF uses the reflective surface RF1 to revert the optical axis OA1 to the optical axis OA2, as can be seen from the previous description. Figures 21 to 23 The relevant explanations will not be repeated here.

[0225] The filter element E7 is made of glass and is located between the sixth lens E6 and the imaging plane IMG. It does not affect the focal length of the imaging optical lens group.

[0226] Please refer to Tables 3A to 3D below.

[0227]

[0228]

[0229]

[0230] The definitions described in Table 3B are the same as those in the first embodiment. Furthermore, in addition to the first and second states, the imaging optical lens group of this embodiment can also have other focusing states with different focal lengths between the first and second states, corresponding to focusing states with different object distances.

[0231] As shown in Table 3B, the second lens group G2 moves relative to the first lens group G1 along the optical axis during the focusing and zooming processes.

[0232]

[0233]

[0234]

[0235] The equations for the aspherical surfaces in Table 3C are expressed in the form of the first embodiment.

[0236]

[0237]

[0238] The definitions described in Table 3D are the same as those in the first embodiment.

[0239] <Fourth Embodiment>

[0240] 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 at the short focal length end and a first state at the long focal length end. Figure 11 From left to right, the images show the spherical aberration, astigmatism, and distortion curves of the imaging device of the fourth embodiment in the first state at the short focal length end. 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 first state at the telephoto end. Figure 10 The upper part is a schematic diagram of the imaging optical lens group in the first state at the short focal length end, while Figure 10 The lower half is a schematic diagram of the imaging optical lens group in its first state at the telephoto end. Figure 10 It is known that the image capturing device 4 includes an image capturing optical lens group (not otherwise labeled) and an electronic photosensitive element IS. The image capturing optical lens group, along the optical path from the object side to the image side, sequentially includes a reflective element LF, an aperture stop S1, a first lens E1, a second lens E2, an aperture ST, a third lens E3, an aperture stop S2, an aperture stop S3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter element E7, and an imaging surface IMG. Furthermore, the image capturing optical lens group, along the optical path from the object side to the image side, has a first lens group G1 and a second lens group G2, wherein the first lens group G1 includes the first lens E1, the second lens E2, and the third lens E3, and the second lens group G2 includes the fourth lens E4, the fifth lens E5, and the sixth lens E6. The first lens group G1 has positive refractive power. The electronic photosensitive element IS is disposed on the imaging surface IMG. The imaging optical lens group consists of six lenses (E1, E2, E3, E4, E5, E6), and there are no other interposed lenses between each lens.

[0241] The imaging optical lens group has a first state corresponding to an infinity object distance and a second state corresponding to a finite object distance. The first state is the state of the imaging optical lens group when the subject is at infinity (infinity object distance), and the second state is the state of the imaging optical lens group when the subject is at a finite object distance (finite object distance). When the subject moves from infinity to a finite object distance, the imaging optical lens group performs a focusing process to change from the first state to the second state. Conversely, when the subject moves from a finite object distance to infinity, the imaging optical lens group also performs a focusing process to change from the second state to the first state. During the focusing process, the first lens group G1 does not move relative to the reflecting surface of the reflecting element LF, the second lens group G2 moves relative to the first lens group G1 along the optical axis, and the imaging plane IMG moves along the optical axis. It is worth noting that during the focusing process, the individual lenses in either lens group do not move relative to each other.

[0242] When the image-capturing optical lens group is in the first state, it has a telephoto first state corresponding to the telephoto end and a short focal length first state corresponding to the short focal length end during zooming. Specifically, when the image-capturing optical lens group transitions from the telephoto first state to the short focal length first state during zooming, the second lens group G2 moves relative to the first lens group G1 along the optical axis toward the image side. Conversely, when the image-capturing optical lens group transitions from the short focal length first state to the telephoto first state during zooming, the second lens group G2 moves relative to the first lens group G1 along the optical axis toward the object side. For example... Figure 10 As shown, Figure 10 The upper part is the imaging optical lens group in its first state at the short focal length end, while... Figure 10 The lower half represents the imaging optical lens group in its first state at the telephoto end. Similarly, when the imaging optical lens group is in its second state, it has both a telephoto-end second state corresponding to the telephoto end and a short-focal-end second state corresponding to the short-focal-end during zooming. During zooming, the first lens group G1 does not move relative to the reflecting surface of the reflecting element LF, the second lens group G2 moves relative to the first lens group G1 along the optical axis, and the imaging plane IMG moves along the optical axis. It is noteworthy that during zooming, the individual lenses within either lens group do not move relative to each other. Please note... Figure 10 The lower half of the imaging optical lens group in the first state at the telephoto end only shows the optically effective area, so some components that are not in the optically effective area have been omitted, such as the peripheral areas of aperture S3 or fourth lens E4 to sixth lens E6.

[0243] 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 object-side surface has a point of inflection off-axis, and its image-side surface has two points of inflection off-axis. Furthermore, its image-side surface has a convex critical point and a concave critical point off-axis.

[0244] 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 two inflection points off-axis, and its image-side surface has two inflection points off-axis.

[0245] The third lens E3 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical. Its object-side surface has two inflection points off-axis, its image-side surface has one inflection point off-axis, and its image-side surface has one concave critical point off-axis.

[0246] 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 off-axis, its image-side surface has four inflection points off-axis, and its image-side surface has a convex critical point off-axis.

[0247] 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. Its object-side surface has three inflection points off-axis, and its image-side surface has four inflection points off-axis. Furthermore, its image-side surface has a convex critical point and a concave critical point off-axis.

[0248] The sixth lens E6 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical. Its object-side surface has two inflection points off-axis, and its image-side surface has two inflection points off-axis. Its object-side surface has a concave critical point off-axis, and its image-side surface has a convex critical point and a concave critical point off-axis.

[0249] The reflective element LF is made of glass and is positioned between the object and the first lens group G1 (or, more specifically, on the object side of the first lens E1). The reflective element LF is a prism, serving to deflect light. For ease of explanation, Figure 10 The deflection effect of the reflective element LF on the optical path is omitted from the drawing. The object-side surface of the reflective element LF is aspherical and convex near the optical axis. The image-side surface of the reflective element LF is planar, but not limited to this. The reflective element LF can have various shapes depending on actual design requirements, thus causing different deflection effects on the optical path. For example, the reflective element LF can be as follows: Figures 21 to 23 As shown, it provides one optical path reversal. The reflective element LF uses the reflective surface RF1 to revert the optical axis OA1 to the optical axis OA2, as can be seen from the previous description. Figures 21 to 23 The relevant explanations will not be repeated here.

[0250] The filter element E7 is made of glass and is located between the sixth lens E6 and the imaging plane IMG. It does not affect the focal length of the imaging optical lens group.

[0251] Please refer to Tables 4A to 4D below.

[0252]

[0253]

[0254]

[0255] The definitions in Table 4B are the same as those in the first embodiment. Furthermore, in addition to the first and second states, the imaging optical lens group of this embodiment can also have other focusing states with different focal lengths between the first and second states, corresponding to focusing states with different object distances.

[0256] As shown in Table 4B, the second lens group G2 moves relative to the first lens group G1 along the optical axis during the focusing and zooming processes.

[0257]

[0258]

[0259]

[0260] The equations for the aspherical surfaces in Table 4C are expressed in the form of the first embodiment.

[0261]

[0262] The definitions described in Table 4D are the same as those in the first embodiment.

[0263] <Fifth Embodiment>

[0264] Please refer to Figure 13 This is a perspective view illustrating an image capturing device according to a fifth embodiment of the present 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 image capturing optical lens group of the first embodiment described above, a lens barrel (not otherwise labeled) for carrying the image capturing optical lens group, and a support device (Holder Member, not otherwise labeled). The imaging lens 101 can also be replaced with the image capturing optical lens group of other embodiments described above, and the present 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.

[0265] The driving device 102 may have an auto-focus function, and its driving method may use a driving system such as a voice coil motor (VCM), microelectromechanical systems (MEMS), piezoelectric systems, and shape memory alloys. The driving device 102 may include a guiding element, which may include a ball-type structure or a cylindrical structure. The guiding element helps to reduce the resistance of the moving lens group during zooming or focusing. The driving device 102 allows the imaging lens 101 to achieve a better imaging position, enabling clear images of the subject at different object distances. In addition, the imaging 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 group, which can truly present the good imaging quality of the imaging optical lens group. The electronic photosensitive element 103 can also be moved in three dimensions relative to the base, and focusing can be achieved by moving the electronic photosensitive element 103.

[0266] 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.

[0267] <Sixth Embodiment>

[0268] Please refer to Figures 14 to 15 ,in Figure 14 A perspective view of one side of an electronic device according to the sixth embodiment of this disclosure is shown, and Figure 15 Draw Figure 14 A three-dimensional diagram of the other side of the electronic device.

[0269] In this embodiment, the electronic device 200 is a smartphone. The electronic device 200 includes image-capturing devices 100, 100a, 100b, and 100c, as well as a display module 201, according to the fifth embodiment. Figure 14 As shown, image capturing devices 100, 100a, and 100b are all located on the same side of the electronic device 200. Figure 15 As shown, the image capturing device 100c and the display module 201 are both located on the other side of the electronic device 200. The image capturing device 100c can serve as a front-facing camera to provide a selfie function, but this disclosure is not limited thereto. Furthermore, the image capturing devices 100a, 100b, and 100c can all include the image capturing optical lens group disclosed herein and can all have a structural configuration similar to that of the image capturing device 100. In detail, each of the image capturing devices 100a, 100b, and 100c can include an imaging lens, a driving device, an electronic photosensitive element, and an image stabilization module, and each can include a reflective element as an element for deflecting the light path. The imaging lens of each of the image capturing devices 100a, 100b, and 100c can each include, for example, an optical lens group (such as the image capturing optical lens group disclosed herein), a lens barrel for supporting the optical lens group, and a support device.

[0270] Image capturing device 100 is a telephoto image capturing device, image capturing device 100a is a wide-angle image capturing device, image capturing device 100b is an ultra-wide-angle image capturing device, and image capturing device 100c is a wide-angle image capturing device. In this embodiment, image capturing devices 100, 100a, and 100b have different viewing angles, allowing the electronic device 200 to provide different magnifications to achieve optical zoom shooting effects. Specifically, half of the maximum viewing angle in image capturing device 100 falls within the range of 5 to 30 degrees, while half of the maximum viewing angle in image capturing device 100a falls within the range of 30 to 60 degrees. This allows the electronic device 200 to have a greater zoom ratio, expanding its application range. Furthermore, as... Figure 15 As shown, the opening of the image capturing device 100c can be non-circular, and the lens barrel or lens inside the image capturing device 100c can have a chamfered edge at its outer diameter to accommodate the non-circular opening. This allows for a further reduction in the single-axis length of the image capturing device 100c, which helps to reduce the lens volume, increase the area ratio of the display module 201 relative to the electronic device 200, and reduce the thickness of the electronic device 200, further achieving module miniaturization. The aforementioned electronic device 200 is exemplified by including multiple image capturing devices 100, 100a, 100b, and 100c, but the number and configuration of the image capturing devices are not intended to limit this disclosure.

[0271] <Seventh Embodiment>

[0272] Please refer to Figures 16 to 18 ,in Figure 16 A perspective view of one side of an electronic device according to the seventh embodiment of this disclosure is shown. Figure 17 Draw Figure 16 A three-dimensional diagram of the other side of the electronic device, and Figure 18 Draw Figure 16 System block diagram of an electronic device.

[0273] In this embodiment, the electronic device 300 is a smartphone. The electronic device 300 includes, according to the fifth embodiment, image capturing devices 100, 100d, 100e, 100f, 100g, and 100h, a flash module 301, a focus assist module 302, an image signal processor 303, a display module 304, and an image software processor 305. Image capturing devices 100, 100d, and 100e are all located on the same side of the electronic device 300. The focus assist module 302 may employ a laser rangefinder or a Time-of-Flight (ToF) module, but this disclosure is not limited thereto. Image capturing devices 100f, 100g, 100h, and display module 304 are all located on the other side of electronic device 300. Display module 304 can serve as a user interface, allowing image capturing devices 100f, 100g, and 100h to function as front-facing lenses for selfies; however, this disclosure is not limited to this. Furthermore, image capturing devices 100d, 100e, 100f, 100g, and 100h can all include the image capturing optical lens group disclosed herein and can all have a structural configuration similar to that of image capturing device 100. Specifically, each of image capturing devices 100d, 100e, 100f, 100g, and 100h can include an imaging lens, a driving device, an electronic photosensitive element, and an image stabilization module, and each can include a reflective element as a component for deflecting the light path. The imaging lenses of imaging devices 100d, 100e, 100f, 100g, and 100h may each include, for example, an optical lens group as disclosed herein, a lens barrel for carrying the optical lens group, and a support device.

[0274] Image capturing device 100 is a telephoto image capturing device, image capturing device 100d is a wide-angle image capturing device, image capturing device 100e is an ultra-wide-angle image capturing device, image capturing device 100f is a wide-angle image capturing device, image capturing device 100g is an ultra-wide-angle image capturing device, and image capturing device 100h is a time-of-flight ranging image capturing device. In this embodiment, image capturing devices 100, 100d, and 100e have different viewing angles, allowing the electronic device 300 to provide different magnifications to achieve optical zoom shooting effects. Specifically, half of the maximum viewing angle in image capturing device 100 falls within the range of 5 to 30 degrees, while half of the maximum viewing angle in image capturing device 100d falls within the range of 30 to 60 degrees. This allows the electronic device 300 to have a greater zoom ratio, expanding its application range. Furthermore, the image-capturing device 100 is a telescopic image-capturing device configured with an optical path deflection element, such as a reflective element, so that the overall length of the image-capturing device 100 is not limited by the thickness of the electronic device 300. The optical path deflection element configuration of the image-capturing device 100, such as a reflective element, can, for example, have a similar... Figures 21 to 25 The structure can be referred to the aforementioned corresponding structure. Figures 21 to 25 The explanation will not be repeated here. In addition, the imaging device 100h can acquire the depth information of the image. The above-described electronic device 300 is an example that includes multiple imaging devices 100, 100d, 100e, 100f, 100g, and 100h, but the number and configuration of the imaging devices are not intended to limit this disclosure.

[0275] When the user photographs the subject 306, the electronic device 300 uses the image capturing device 100, image capturing device 100d, or image capturing device 100e to focus the light and activates the flash module 301 for supplemental lighting. It then uses the subject distance information provided by the focus assist module 302 for rapid focusing. Furthermore, the image signal processor 303 performs image optimization processing to further improve the image quality produced by the image capturing optical lens group. The focus assist module 302 can use an infrared or laser focus assist system to achieve rapid focusing. Alternatively, the electronic device 300 can also use the image capturing device 100f, image capturing device 100g, or image capturing device 100h for shooting. The display module 304 can use a touch screen, combined with the diverse functions of the image software processor 305 for image capturing and image processing (or can use a physical shooting button). The image processed by the image software processor 305 can be displayed on the display module 304.

[0276] <Eighth Embodiment>

[0277] Please refer to Figure 19 This is a perspective view illustrating one side of an electronic device according to the eighth embodiment of this disclosure.

[0278] In this embodiment, the electronic device 400 is a smartphone. The electronic device 400 includes, according to the fifth embodiment, image capturing devices 100i, 100j, 100k, 100m, 100n, 100p, 100q, and 100r, a flash module 401, a focus assist module, an image signal processor, a display module, and an image software processor (not shown). Image capturing devices 100i, 100j, 100k, 100m, 100n, 100p, 100q, and 100r are all located on the same side of the electronic device 400, while the display module is located on the other side of the electronic device 400. Furthermore, the imaging devices 100i, 100j, 100k, 100m, 100n, 100p, 100q, and 100r may all include the imaging optical lens group disclosed herein and may all have a structural configuration similar to that of the imaging device 100, which will not be described in detail here.

[0279] Image capturing device 100 is a telephoto image capturing device, image capturing device 100i is a telephoto image capturing device, image capturing device 100j is a wide-angle image capturing device, image capturing device 100k is a wide-angle image capturing device, image capturing device 100m is an ultra-wide-angle image capturing device, image capturing device 100n is an ultra-wide-angle image capturing device, image capturing device 100p is a telephoto image capturing device, image capturing device 100q is a telephoto image capturing device, and image capturing device 100r is a time-of-flight ranging image capturing device. In this embodiment, image capturing devices 100, 100i, 100j, 100k, 100m, 100n, 100p, and 100q have different viewing angles, allowing the electronic device 400 to provide different magnifications to achieve an optical zoom shooting effect. In image capturing device 100, half of the maximum viewing angle falls within the range of 5 to 30 degrees, while in image capturing device 100j, half of the maximum viewing angle falls within the range of 30 to 60 degrees. This allows the electronic device 400 to have a greater zoom ratio, expanding its application range. Furthermore, image capturing devices 100 and 100i are telescopic image capturing devices configured with optical path deflection elements, such as reflective elements. The optical path deflection element configuration of image capturing devices 100 and 100i can, for example, have similar... Figures 21 to 25 The structure can be referred to the aforementioned corresponding structure. Figures 21 to 25The description of the image acquisition device 100r will not be repeated here. Additionally, the image acquisition device 100r can acquire depth information of the image. The electronic device 400 described above is exemplified by including multiple image acquisition devices 100, 100i, 100j, 100k, 100m, 100n, 100p, 100q, and 100r, but the number and configuration of the image acquisition devices are not intended to limit this disclosure. When a user photographs a subject, the electronic device 400 uses image acquisition devices 100, 100i, 100j, 100k, 100m, 100n, 100p, 100q, or 100r to focus light and capture an image, activates the flash module 401 for supplemental lighting, and performs subsequent processing in a manner similar to the aforementioned embodiments, which will not be repeated here.

[0280] 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 devices, tablets, smart TVs, network monitoring equipment, dashcams, reversing cameras, multi-lens systems, recognition systems, motion-sensing game consoles, and wearable devices. The aforementioned electronic devices are merely illustrative examples of practical applications of this disclosure and do not limit the scope of application of the image capturing device disclosed herein.

[0281] Although this disclosure is presented above with reference to the preferred embodiments described above, it is not intended to limit this disclosure. Any person skilled in the art may make some modifications and refinements without departing from the spirit and scope of this disclosure. Therefore, the scope of patent protection of this disclosure shall be determined by the claims appended to this specification.

Claims

1. An image-capturing optical lens assembly, characterized in that, It includes two groups of lens groups. The two groups of lens groups are, in sequence from an object side to an image side along the optical path, a first lens group and a second lens group. All the lenses of the two groups of lens groups respectively have an object side surface facing the object side direction and an image side surface facing the image side direction, and the total number of lens groups of the imaging optical lens group is two groups; Among them, the imaging optical lens group has a first state corresponding to an infinite object distance; Among them, the imaging optical lens group in the first state has a first long focal length state corresponding to the long focal end and a first short focal length state corresponding to the short focal end during a zooming process, and at least one of the two groups of lens groups moves along the optical axis direction during the zooming process; Among them, the first lens group has a positive refractive power, and at least one of the object side surface and the image side surface of at least one lens in the two groups of lens groups has at least one inflection point at an off-axis position; Among them, half of the maximum viewing angle of the imaging optical lens group in the first short focal length state is HFOVSf, half of the maximum viewing angle of the imaging optical lens group in the first long focal length state is HFOVLf, the distance from the object side surface of the lens closest to the object side in the first short focal length state of the imaging optical lens group to an imaging surface on the optical axis is TLSf, and the distance from the object side surface of the lens closest to the object side in the first long focal length state of the imaging optical lens group to the imaging surface on the optical axis is TLLf, which satisfy the following conditions: 1.20 < HFOVSf / HFOVLf < 2.50; and 0 ≤ 10 × |TLSf - TLLf| / TLSf < 1.

00.

2. The imaging optical lens assembly according to claim 1, characterized in that, Half of the maximum viewing angle of the imaging optical lens group in the first short focal length state is HFOVSf, half of the maximum viewing angle of the imaging optical lens group in the first long focal length state is HFOVLf, which satisfy the following conditions: 1.22 < HFOVSf / HFOVLf < 2.

00.

3. The imaging optical lens assembly according to claim 1, characterized in that, The distance from the object side surface of the lens closest to the object side in the first short focal length state of the imaging optical lens group to the imaging surface on the optical axis is TLSf, and the distance from the object side surface of the lens closest to the object side in the first long focal length state of the imaging optical lens group to the imaging surface on the optical axis is TLLf, which satisfy the following conditions: 0.01 < 10 × |TLSf - TLLf| / TLSf < 0.

50.

4. The imaging optical lens assembly according to claim 1, characterized in that, The f-number of the imaging optical lens group in the first short focal length state is FnoSf, and the f-number of the imaging optical lens group in the first long focal length state is FnoLf, which satisfy the following conditions: 1.50 < FnoSf < 4.00; and 1.80 < FnoLf < 4.

50.

5. The imaging optical lens assembly according to claim 1, characterized in that, The lens closest to the object side in the first lens group has a positive refractive power.

6. The imaging optical lens assembly according to claim 1, characterized in that, The imaging optical lens group includes six lenses, and the six lenses are, in sequence from the object side to the image side along the optical path, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens; Among them, half of the maximum viewing angle of the imaging optical lens group in the first state at the short focal end is HFOVSf, which satisfies the following conditions: 8.0 degrees < HFOVSf < 25.0 degrees.

7. The imaging optical lens assembly according to claim 6, characterized in that, The first lens group includes the first lens, the second lens, and the third lens. The second lens group includes the fourth lens, the fifth lens, and the sixth lens. The second lens group moves along the optical axis direction during the zooming process, and there is no relative movement between the lenses in either the first lens group or the second lens group during the zooming process.

8. The imaging optical lens assembly according to claim 7, characterized in that, The object-side surface of the first lens is convex near the optical axis. The second lens has a negative refractive power, and the sixth lens has a negative refractive power.

9. The imaging optical lens assembly according to claim 7, characterized in that, The image-side surface of the sixth lens is concave near the optical axis, and the image-side surface of the sixth lens has at least one inflection point off the axis.

10. The imaging optical lens assembly according to claim 7, characterized in that, The distance from the object-side surface of the lens closest to the object side in the first state at the short focal end of the imaging optical lens group to the imaging surface on the optical axis is TLSf. The distance from the object-side surface of the lens closest to the object side in the first state at the long focal end of the imaging optical lens group to the imaging surface on the optical axis is TLLf. The maximum imaging height of the imaging optical lens group is ImgH, which satisfies the following conditions: 3.00 < TLSf / ImgH < 6.50; and 3.00 < TLLf / ImgH < 6.

50.

11. The imaging optical lens assembly according to claim 7, characterized in that, The distance from the object-side surface of the lens closest to the object side in the first lens group to the image-side surface of the lens closest to the image side in the first lens group on the optical axis is TG1. The distance from the object-side surface of the lens closest to the object side in the second lens group to the image-side surface of the lens closest to the image side in the second lens group on the optical axis is TG2, which satisfies the following conditions: 0.50 < TG1 / TG2 < 1.

80.

12. The imaging optical lens assembly according to claim 1, characterized in that, It further includes a reflection element. The reflection element has at least one reflection surface. The reflection element is located between an object to be photographed and the first lens group, and the first lens group has no relative movement with respect to the at least one reflection surface during the zooming process.

13. An image capturing device, characterized in that, Includes: The imaging optical lens group according to claim 1; and An electronic photosensitive element disposed on the imaging surface of the imaging optical lens group.

14. An electronic device, characterized in that, Includes: A first imaging device, including the imaging device according to claim 13, wherein half of the maximum viewing angle in the first imaging device falls within the range of 5 degrees to 30 degrees; and A second imaging device, on the same side of the electronic device as the first imaging device, wherein half of the maximum viewing angle in the second imaging device falls within the range of 30 degrees to 60 degrees.

15. An image-capturing optical lens assembly, characterized in that, It includes two lens groups. The two lens groups are sequentially the first lens group and the second lens group along the optical path from the object side to the image side. All the lenses of the two lens groups have an object-side surface facing the object side direction and an image-side surface facing the image side direction, and the total number of lens groups of the imaging optical lens group is two; Among them, the imaging optical lens group has a first state corresponding to an infinite object distance and a second state corresponding to a finite object distance; Among them, when a photographed object moves from an infinite object distance to a finite object distance, the imaging optical lens group undergoes a focusing process to change from the first state to the second state; Among them, the imaging optical lens group in the first state has a first long focal length state corresponding to the long focal end and a first short focal length state corresponding to the short focal end during a zooming process, and at least one of the two lens groups moves along the optical axis direction during the zooming process; Among them, at least one of the object-side surface and the image-side surface of at least one lens in the two lens groups has at least one inflection point at an off-axis position; Among them, half of the maximum viewing angle of the imaging optical lens group in the first short focal length state is HFOVSf, half of the maximum viewing angle of the imaging optical lens group in the first long focal length state is HFOVLf, the distance from the object-side surface of the lens closest to the object side in the first short focal length state of the imaging optical lens group to the imaging surface on the optical axis is TLSf, and the distance from the object-side surface of the lens closest to the object side in the first long focal length state of the imaging optical lens group to the imaging surface on the optical axis is TLLf, which satisfy the following conditions: 1.20 < HFOVSf / HFOVLf < 2.50; and 0 ≤ 10×|TLSf - TLLf| / TLSf < 1.

00.

16. The imaging optical lens assembly according to claim 15, characterized in that, The distance from the object-side surface of the lens closest to the object side in the first short focal length state of the imaging optical lens group to the image-side surface of the lens closest to the image side on the optical axis is TDSf, the distance from the object-side surface of the lens closest to the object side in the first long focal length state of the imaging optical lens group to the image-side surface of the lens closest to the image side on the optical axis is TDLf, and the distance from the object-side surface of the lens closest to the object side in the first short focal length state of the imaging optical lens group to the imaging surface on the optical axis is TLSf, which satisfy the following conditions: 0.20 < (TDSf - TDLf) / TLSf < 0.

70.

17. The imaging optical lens assembly according to claim 15, characterized in that, The distance from the object-side surface of the lens closest to the object side in the first short focal length state of the imaging optical lens group to the imaging surface on the optical axis is TLSf, and the distance from the object-side surface of the lens closest to the object side in the first long focal length state of the imaging optical lens group to the imaging surface on the optical axis is TLLf, which satisfy the following conditions: 0.01 < 10×|TLSf - TLLf| / TLSf < 0.

30.

18. The imaging optical lens assembly according to claim 15, characterized in that, The total focal length of the imaging optical lens group in the first short focal length state is fSf, and the focal length of the first lens group is fG1, which satisfy the following conditions: 0.30 < fSf / fG1 < 2.

00.

19. The imaging optical lens assembly according to claim 15, characterized in that, In the second state, the imaging optical lens group has a telephoto end second state corresponding to the telephoto end and a short focal length end second state corresponding to the short focal length end during the zoom process. The aperture value of the imaging optical lens group in the short focal length end first state is FnoSf, the aperture value of the imaging optical lens group in the short focal length end second state is FnoSn, the aperture value of the imaging optical lens group in the telephoto end first state is FnoLf, and the aperture value of the imaging optical lens group in the telephoto end second state is FnoLn, which satisfies the following conditions: 0.01 < 10 × |FnoSn - FnoSf| < 1.00; and 0.01<10×|FnoLn-FnoLf|<1.

00.

20. The imaging optical lens assembly according to claim 15, characterized in that, In the second state, the imaging optical lens group has a telephoto end second state corresponding to the telephoto end and a short focal length end second state corresponding to the short focal length end during the zoom process. In the short focal length end first state, the distance from the object-side surface of the lens closest to the object to the imaging plane on the optical axis is TLSf. In the short focal length end second state, the distance from the object-side surface of the lens closest to the object to the imaging plane on the optical axis is TLSn. In the telephoto end first state, the distance from the object-side surface of the lens closest to the object is TLSn. The distance from the side surface to the imaging plane on the optical axis is TLLf; the distance from the object-side surface of the lens closest to the object side in the second state at the telephoto end of the imaging optical lens group to the imaging plane on the optical axis is TLLn; the total focal length of the imaging optical lens group in the first state at the short focal end is fSf; the total focal length of the imaging optical lens group in the second state at the short focal end is fSn; the total focal length of the imaging optical lens group in the first state at the telephoto end is fLf; and the total focal length of the imaging optical lens group in the second state at the telephoto end is fLn, satisfying the following conditions: 0.10<10×(TLSn / fSn-TLSf / fSf)<0.80; and 0.10<10×(TLLn / fLn-TLLf / fLf)<0.

80.

21. The imaging optical lens assembly according to claim 15, characterized in that, The imaging optical lens group includes six lenses, which are 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, a fifth lens, and a sixth lens. The first lens group includes the first lens, the second lens, and the third lens, and the second lens group includes the fourth lens, the fifth lens, and the sixth lens.

22. The imaging optical lens assembly according to claim 21, characterized in that, The thickness of the first lens along the optical axis is CT1, the thickness of the second lens along the optical axis is CT2, and the thickness of the third lens along the optical axis is CT3. The distance between the first lens and the second lens along the optical axis is T12, and the distance between the second lens and the third lens along the optical axis is T23. These conditions must be met. 1.00<(CT1+CT2+CT3) / (T12+T23)<4.

50.

23. The imaging optical lens assembly according to claim 21, characterized in that, The thickness of the first lens on the optical axis is CT1, and the thickness of the sixth lens on the optical axis is CT6, which satisfy the following conditions: 2.50 < CT1 / CT6 < 8.

00.

24. The imaging optical lens assembly according to claim 21, characterized in that, The total focal length of the imaging optical lens group in the first state at the short focal end is fSf, the focal length of the second lens is f2, the focal length of the fourth lens is f4, and the focal length of the fifth lens is f5, which satisfy the following conditions: 0.01 < (|fSf / f4| + |fSf / f5|) / |fSf / f2| < 1.

50.

25. The imaging optical lens assembly according to claim 15, characterized in that, In the second state, the imaging optical lens group has a second state at the long focal end corresponding to the long focal end and a second state at the short focal end corresponding to the short focal end during the zooming process. The imaging surface moves along the optical axis direction during the zooming process or the focusing process. The displacement amount of the imaging surface during the process of the imaging optical lens group changing from the first state at the short focal end to the second state at the short focal end is DImgS, which satisfies the following conditions: 0.050 mm < DImgS < 0.800 mm.

26. The imaging optical lens assembly according to claim 15, characterized in that, In the second state, the imaging optical lens group has a second state at the long focal end corresponding to the long focal end and a second state at the short focal end corresponding to the short focal end during the zooming process. The imaging surface moves along the optical axis direction during the zooming process or the focusing process. The displacement amount of the imaging surface during the process of the imaging optical lens group changing from the first state at the short focal end to the second state at the short focal end is DImgS. The minimum value of the thickness of a single lens on the optical axis among all the lenses of the imaging optical lens group is CTmin, which satisfies the following conditions: 0.20 < DImgS / CTmin < 1.

50.

27. The imaging optical lens assembly according to claim 15, characterized in that, It further includes a reflection element, where the reflection element has at least one reflection surface. The reflection element is located between the object to be photographed and the first lens group, and the first lens group has no relative movement with respect to the at least one reflection surface during the zooming process.

28. The imaging optical lens assembly according to claim 15, characterized in that, Half of the maximum viewing angle of the imaging optical lens group in the first state at the short focal end is HFOVSf, half of the maximum viewing angle of the imaging optical lens group in the first state at the long focal end is HFOVLf. The distance from the object-side surface of the lens closest to the object side in the first state at the short focal end of the imaging optical lens group to the imaging surface on the optical axis is TLSf, and the distance from the object-side surface of the lens closest to the object side in the first state at the long focal end of the imaging optical lens group to the imaging surface on the optical axis is TLLf, which satisfy the following conditions: 1.28 ≤ HFOVSf / HFOVLf ≤ 1.52; and 0.02 ≤ 10×|TLSf - TLLf| / TLSf ≤ 0.15.

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