Lens element, imaging lens, camera module, and electronic device

Abstract

A lens element, an imaging lens, a camera module and an electronic device are disclosed. The lens element has a central axis and includes an optically effective portion, a peripheral portion and a plurality of protruding structures. The central axis passes through the optically effective portion and includes a first optical surface and a second optical surface. The second optical surface is disposed opposite to the first optical surface. The peripheral portion surrounds the optically effective portion and includes a first peripheral surface, a second peripheral surface and an outer ring surface. The first peripheral surface is directed toward the same side as the first optical surface. The second peripheral surface is directed toward the same side as the second optical surface. The outer ring surface connects the first peripheral surface and the second peripheral surface. The protruding structures are disposed on the first peripheral surface. The protruding structures extend along a helical path and are spaced apart. The helical path surrounds the optically effective portion and tapers toward the central axis. Thus, the fit between a mold and the lens element can be improved.

Description

Technical Field

[0001] The present disclosure relates to a lens element, an imaging lens, and a camera module, and more particularly to a lens element, an imaging lens, and a camera module applied to a portable electronic device. Background Art

[0002] In recent years, portable electronic devices have developed rapidly. For example, smart electronic devices, tablet computers, etc. have flooded into modern people's lives, and the camera modules, imaging lenses, and their lens elements mounted on portable electronic devices have also flourished. However, with the progress of technology, users' requirements for the quality of lens elements are getting higher and higher. Therefore, developing a lens element that can prevent warping or deformation during demolding has become an important and urgent problem in the industry. Summary of the Invention

[0003] The present disclosure provides a lens element, an imaging lens, a camera module, and an electronic device. By means of the convex structure, when the lens element is manufactured and molded, the fitting degree between the mold and the lens element can be improved, and warping or deformation during demolding can be prevented.

[0004] According to an embodiment of the present disclosure, a lens element is provided. The lens element has a central axis and includes an optically effective portion, an outer peripheral portion, and a plurality of convex structures. The central axis passes through the optically effective portion and includes a first optical surface and a second optical surface. The second optical surface is disposed opposite to the first optical surface. The outer peripheral portion surrounds the optically effective portion and includes a first outer peripheral surface, a second outer peripheral surface, and an outer ring surface. The first outer peripheral surface and the first optical surface face the same side. The second outer peripheral surface and the second optical surface face the same side. The outer ring surface connects the first outer peripheral surface and the second outer peripheral surface. The convex structures are disposed on the first outer peripheral surface. The convex structures extend along a spiral path and are arranged at intervals, and the spiral path surrounds the optically effective portion and tapers towards the central axis. The first one of the convex structures on the spiral path is a first convex structure, and the last one of the convex structures on the spiral path is a last convex structure. The distance from the first convex structure to the central axis is DS, the distance from the last convex structure to the central axis is DE, the distance from the outer ring surface to the central axis is ψ, and the distance from the first convex structure to the central axis is DS, which satisfies the following conditions: 0.005 mm < DS - DE < 1 mm; and 0.7 < DS / ψ < 1.

[0005] For the lens element according to the embodiment described above, the central distance between the first optical surface and the first outer peripheral surface is t, and the central distance between the first optical surface and the second optical surface is CT, which can satisfy the following conditions: 0.8 < t / CT < 5.5. Additionally, it can satisfy the following conditions: 1.0 < t / CT < 5.0.

[0006] According to the lens element of the embodiment described above, the length of each protruding structure along the spiral path is S1, and the spacing between the protruding structures along the spiral path is S2, which can satisfy the following condition: 0.2 <S1 / S2<5。

[0007] According to the lens element of the embodiment described above, the distance from the first protrusion structure to the central axis is DS, and the distance from the last protrusion structure to the central axis is DE, which can satisfy the following condition: 0.015mm≤DS-DE≤0.8mm.

[0008] According to the lens element of the embodiment described above, the protruding structure can gradually approach the central axis along a spiral path.

[0009] According to the embodiment described above, the lens element may be manufactured by injection molding, and the lens element may further include at least one injection mark, which is disposed on the outer ring surface.

[0010] In the lens element according to the embodiments described above, at least one of the first optical surface and the second optical surface may be an optical aspherical surface.

[0011] According to one embodiment of the present disclosure, an imaging lens is provided, comprising a plastic lens barrel and an imaging lens group, wherein the imaging lens group is housed in the plastic lens barrel and includes at least one lens element as described in the foregoing embodiments.

[0012] According to the imaging lens of the embodiment described above, the lens element may further include a bearing surface, the bearing surface and the first optical surface facing the same side, the bearing surface having a convex structure close to the optical effective part, and bearing against an adjacent element.

[0013] According to one embodiment of the present disclosure, a camera module is provided, including an imaging lens as described in the foregoing embodiments and an electronic photosensitive element, wherein the electronic photosensitive element is disposed on an imaging surface of the imaging lens.

[0014] According to one embodiment of the present disclosure, an electronic device is provided, which includes a camera module as described in the foregoing embodiments.

[0015] According to an embodiment of the present disclosure, a lens element is provided. It has a central axis and includes an optically effective portion, an outer peripheral portion, and a plurality of raised structures. The optically effective portion includes a first optical surface and a second optical surface. The second optical surface is disposed opposite to the first optical surface. The outer peripheral portion surrounds the optically effective portion and includes a first outer peripheral surface, a second outer peripheral surface, and an outer ring surface. The first outer peripheral surface and the first optical surface face the same side. The second outer peripheral surface and the second optical surface face the same side. The outer ring surface connects the first outer peripheral surface and the second outer peripheral surface. The raised structures are disposed on the first outer peripheral surface. The raised structures extend along a helical path and are arranged at intervals. The helical path surrounds the optically effective portion and tapers towards the central axis. At least three of the raised structures each have a first identification end and a second identification end in a cross-section perpendicular to the first outer peripheral surface. The first identification end is connected to the first outer peripheral surface, and there is a spacing between the second identification end and the first outer peripheral surface. An angle α is formed between each raised structure and the first outer peripheral surface on one side of the second identification end. For the first raised structure among the raised structures on the helical path, the distance from the outer ring surface to the central axis is ψ, and the distance from the first raised structure to the central axis is DS, which satisfy the following conditions: 45 degrees ≤ α ≤ 90 degrees; and 0.7 < DS / ψ < 1.

[0016] For the lens element according to the embodiment described in the previous paragraph, the angle is α, which may satisfy the following conditions: 60 degrees ≤ α ≤ 90 degrees.

[0017] For the lens element according to the embodiment described in the previous paragraph, the central distance between the first optical surface and the first outer peripheral surface is t, and the central distance between the first optical surface and the second optical surface is CT, which may satisfy the following conditions: 0.8 < t / CT < 5.5. Additionally, it may satisfy the following conditions: 1.0 < t / CT < 5.0.

[0018] For the lens element according to the embodiment described in the previous paragraph, the length of each raised structure along the helical path is S1, and the spacing distance of the raised structures along the helical path is S2, which may satisfy the following conditions: 0.2 < S1 / S2 < 5.

[0019] For the lens element according to the embodiment described in the previous paragraph, the raised structures may gradually approach the central axis along the helical path.

[0020] For the lens element according to the embodiment described in the previous paragraph, each raised structure may further have a vertex in a cross-section perpendicular to the first outer peripheral surface. The vertex is the highest point of each raised structure, and the spacing along the central axis between the vertex and the second identification end is less than the spacing along the central axis between the vertex and the first identification end.

[0021] According to an embodiment of the present disclosure, an imaging lens is provided, which includes a plastic lens barrel and an imaging lens group. The imaging lens group is accommodated in the plastic lens barrel and includes at least one lens element as described in the foregoing embodiments.

[0022] According to the imaging lens of the embodiment described above, the lens element may further include a bearing surface, the bearing surface and the first optical surface facing the same side, the bearing surface having a convex structure close to the optical effective part, and bearing against an adjacent element.

[0023] According to one embodiment of the present disclosure, a camera module is provided, including an imaging lens as described in the foregoing embodiments and an electronic photosensitive element, wherein the electronic photosensitive element is disposed on an imaging surface of the imaging lens.

[0024] According to one embodiment of the present disclosure, an electronic device is provided, which includes a camera module as described in the foregoing embodiments. Attached Figure Description

[0025] Figure 1A A schematic diagram of an imaging lens according to the first embodiment of this disclosure is shown;

[0026] Figure 1B Drawing according to Figure 1A A three-dimensional schematic diagram of the lens element in the first embodiment;

[0027] Figure 1C Drawing according to Figure 1A A schematic diagram of the lens element in the first embodiment;

[0028] Figure 1D Drawing according to Figure 1A A schematic diagram of the parameters of the lens element in the first embodiment;

[0029] Figure 2A A perspective view of the lens element in the second embodiment according to this disclosure is shown;

[0030] Figure 2B Drawing according to Figure 2A A schematic diagram of the lens element in the second embodiment;

[0031] Figure 2C Drawing according to Figure 2A A schematic diagram of the parameters of the lens element in the second embodiment;

[0032] Figure 3A A perspective view of the lens element in accordance with the third embodiment of this disclosure is shown;

[0033] Figure 3B Drawing according to Figure 3A A schematic diagram of the lens element in the third embodiment;

[0034] Figure 3C Drawing according to Figure 3A A schematic diagram of the parameters of the lens element in the third embodiment;

[0035] Figure 4A A schematic diagram of a lens element according to the fourth embodiment of this disclosure is shown;

[0036] Figure 4B Drawing according to Figure 4A A schematic diagram of the parameters of the lens element in the fourth embodiment;

[0037] Figure 5A A schematic diagram of the lens element according to the fifth embodiment of this disclosure is shown;

[0038] Figure 5B Drawing according to Figure 5A A schematic diagram of the parameters of the lens element in the fifth embodiment;

[0039] Figure 6A A schematic diagram of an electronic device according to the sixth embodiment of this disclosure is shown;

[0040] Figure 6B Drawing according to Figure 6A Another schematic diagram of the electronic device in the sixth embodiment;

[0041] Figure 6C Drawing according to Figure 6A A schematic diagram of the image in the sixth embodiment;

[0042] Figure 6D Drawing according to Figure 6A Another image illustration in the sixth embodiment;

[0043] Figure 6E Drawing according to Figure 6A Another image illustration in the sixth embodiment;

[0044] Figure 7 A schematic diagram of an electronic device according to the seventh embodiment of this disclosure is shown;

[0045] Figure 8A A schematic diagram of the vehicle tool according to the eighth embodiment of this disclosure is shown;

[0046] Figure 8B Drawing according to Figure 8A Another schematic diagram of the vehicle tools in the eighth embodiment; and

[0047] Figure 8C Drawing according to Figure 8A Another schematic diagram of the vehicle tool in the eighth embodiment.

[0048] [Symbol Explanation]

[0049] 10: Imaging Lens

[0050] 110: Plastic lens barrel

[0051] 121, 122, 123, 124, 125, 126, 127, 220, 320, 420, 520: Lens elements; 131, 132, 133, 134, 135, 136, 137, 138, 139: Light-shielding elements

[0052] 140: Fixed element

[0053] 151, 251, 351, 451, 551: Effective optical components

[0054] 151a, 251a, 351a, 451a, 551a: First optical surface

[0055] 151b, 251b, 351b, 451b, 551b: Second optical surface

[0056] 152,252,352,452,552: Peripheral part

[0057] 152a, 252a, 352a, 452a, 552a: First outer peripheral surface

[0058] 152b, 252b, 352b, 452b, 552b: Second outer peripheral surface

[0059] 152c, 252c, 352c, 452c, 552c: Outer torus

[0060] 153,253,353,453,553: Protruding structure

[0061] 153a, 253a, 353a, 453a, 553a: First protruding structure

[0062] 153b, 253b, 353b, 453b, 553b: The last raised structure

[0063] 154, 254, 354, 454, 554: Injection marks

[0064] 155: Support surface

[0065] 156a, 256a, 356a, 456a, 556a: First identification terminal

[0066] 156b, 256b, 356b, 456b, 556b: Second identification terminal

[0067] 156c, 256c, 356c, 456c, 556c: Vertices

[0068] 60, 70: Electronic devices

[0069] 61: User Interface

[0070] 62, 711, 712: Ultra-wide-angle camera module

[0071] 63: High-resolution camera module

[0072] 64,715,716,717,718: Telephoto camera modules

[0073] 65: Imaging signal processing element

[0074] 66,720: Flash module

[0075] 713, 714: Wide-angle camera module

[0076] 719: TOF Module

[0077] 80: Vehicles and Tools

[0078] 81: Camera module O: Central axis

[0079] I1, I2, I3, I4: External space information

[0080] DS: Distance from the first protrusion to the central axis

[0081] DE: Distance from the final protrusion to the central axis

[0082] t: Center distance between the first optical surface and the first outer peripheral surface

[0083] CT: Center distance between the first optical surface and the second optical surface

[0084] ψ: Distance from the outer torus to the central axis

[0085] S1: Length of the protruding structure along the spiral path

[0086] S2: Spacing between protruding structures along the spiral path

[0087] α: included angle

[0088] θ: perspective Detailed Implementation

[0089] This disclosure provides a lens element having a central axis and including an optically active portion, an outer peripheral portion, and a plurality of protruding structures. The central axis passes through the optically active portion and includes a first optical surface and a second optical surface, wherein the second optical surface is disposed opposite to the first optical surface. The outer peripheral portion surrounds the optically active portion and includes a first outer peripheral surface, a second outer peripheral surface, and an outer ring surface, wherein the first outer peripheral surface and the first optical surface face the same side, the second outer peripheral surface and the second optical surface face the same side, and the outer ring surface connects the first outer peripheral surface and the second outer peripheral surface. The protruding structures are disposed on the first outer peripheral surface, extending along a spiral path and spaced apart, and the spiral path surrounds the optically active portion and gradually tapers towards the central axis.

[0090] By incorporating raised structures, the fit between the mold and the lens element can be improved during manufacturing, preventing warping or deformation during demolding. Furthermore, arranging the raised structures in a spiral path allows for a faster mold processing flow, improving mold processing efficiency. Additionally, the number and density of the raised structures can be more easily adjusted according to different design and molding requirements.

[0091] Specifically, the spiral path can taper clockwise or counterclockwise towards the center. The spiral path can be an Archimedes' spiral, a Fermat's spiral, or a logarithmic spiral, but is not limited to these. Furthermore, when r and θ are the two coordinate axes of a polar coordinate system with the central axis as the origin, a and b are constants, and e is the natural constant, the detailed formula for the spiral path is as follows:

[0092] Archimedes spiral: r = a + bθ;

[0093] Fermat's spiral: r = a × √θ; and

[0094] Equal-angle spiral: r = a × e bθ .

[0095] Furthermore, the protrusion extends along a spiral path, meaning that the protrusion extends from a first position on the spiral path to a second position on the spiral path, and more specifically, the second position is closer to the central axis than the first position.

[0096] At least three of the convex structures may each have a first identification end and a second identification end on a cross-section perpendicular to the first outer peripheral surface, where the first identification end is connected to the first outer peripheral surface, and there is a spacing between the second identification end and the first outer peripheral surface. Specifically, the first identification end and the second identification end are respectively the two ends of the convex structure close to and far from the optically effective part, and can be observed and identified from the direction perpendicular to the first outer peripheral surface. Alternatively, the first identification end and the second identification end can be respectively the two ends of the convex structure far from and close to the optically effective part.

[0097] The first of the convex structures on the spiral path may be a first convex structure, and the last of the convex structures on the spiral path may be a last convex structure. Furthermore, the distance from the first convex structure to the central axis is DS, and the distance from the last convex structure to the central axis is DE, which may satisfy the following condition: 0.005 mm < DS - DE < 1 mm. When DS - DE satisfies the above condition, a more balanced adhesion force can be provided. Additionally, it may satisfy the following condition: 0.015 mm ≤ DS - DE ≤ 0.8 mm. When DS - DE satisfies the above condition, the die replacement rate can be further reduced, thereby reducing the production cost.

[0098] An angle α is formed between one side of each convex structure at the second identification end and the first outer peripheral surface, and the angle α may satisfy the following condition: 45 degrees ≤ α ≤ 90 degrees. Thereby, the lens element and the mold can be more closely fitted. Additionally, it may satisfy the following condition: 60 degrees ≤ α ≤ 90 degrees. When α satisfies the above condition, the difficulty of mold processing can be reduced, and the feasibility of mold demolding can be provided.

[0099] The convex structures can gradually approach the central axis along the spiral path. Thereby, it is beneficial to the automated process of mold processing.

[0100] The lens element can be made by injection molding, and the lens element may further include at least one injection mark, where the injection mark is provided on the outer ring surface. Thereby, a high-precision and miniaturized precision lens element can be provided.

[0101] At least one of the first optical surface and the second optical surface may be an aspherical surface. Thereby, a lens element with high resolution can be provided.

[0102] Each convex structure may further have a vertex on a cross-section perpendicular to the first outer peripheral surface. The vertex is the highest point of each convex structure, and the spacing between the vertex and the second identification end along the direction perpendicular to the central axis is less than the spacing between the vertex and the first identification end along the direction perpendicular to the central axis. Thereby, the lens element can be more effectively prevented from warping or deforming.

[0103] The central distance between the first optical surface and the first outer peripheral surface is t, and the central distance between the first optical surface and the second optical surface is CT, which can satisfy the following condition: 0.8 < t / CT < 5.5. When t / CT satisfies the above condition, the molding yield of the lens element that is prone to warping or deformation can be effectively improved. In addition, it can satisfy the following condition: 1.0 < t / CT < 5.0. When t / CT satisfies the above condition, the dimensional tolerance of the optically effective part can be further optimized.

[0104] The distance from the outer ring surface to the central axis is ψ, and the distance from the first convex structure to the central axis is DS, which can satisfy the following condition: 0.7 < DS / ψ < 1. By arranging the convex structure closer to the outer ring surface of the lens element, the probability of stray light generation can be effectively reduced.

[0105] The length of each convex structure along the spiral path is S1, and the interval distance of the convex structures along the spiral path is S2, which can satisfy the following condition: 0.2 < S1 / S2 < 5. When S1 / S2 satisfies the above condition, a more appropriate疏密间隔 (sparse and dense interval) can be obtained, and the structural integrity can be maintained. Specifically, the interval distance of the convex structures along the spiral path refers to the interval distance between two adjacent convex structures along the spiral path.

[0106] All the technical features in the above-mentioned lens element of the present disclosure can be combined and configured to achieve the corresponding effects.

[0107] The present disclosure provides an imaging lens, wherein the imaging lens includes a plastic lens barrel and an imaging lens group. The imaging lens group is accommodated in the plastic lens barrel and includes at least one of the foregoing lens elements.

[0108] The lens element may further include a bearing surface, wherein the bearing surface faces the same side as the first optical surface, the bearing surface is closer to the optically effective part than the convex structure, and abuts against an adjacent element. Thereby, the flatness of the bearing surface can be ensured, and the assembly tolerance can be reduced to provide a high-resolution imaging lens.

[0109] All the technical features in the above-mentioned imaging lens of the present disclosure can be combined and configured to achieve the corresponding effects.

[0110] The present disclosure provides a camera module, wherein the camera module includes the foregoing imaging lens and an electronic photosensitive element. The electronic photosensitive element is disposed on an imaging surface of the imaging lens.

[0111] The present disclosure provides an electronic device, wherein the electronic device includes the foregoing camera module.

[0112] According to the above embodiments, specific embodiments are proposed below and will be described in detail with reference to the accompanying drawings.

[0113] <First Embodiment>

[0114] Please refer to Figure 1A The diagram illustrates the imaging lens 10 according to the first embodiment of this disclosure. Figure 1A As can be seen, the imaging lens 10 includes a plastic lens barrel 110 and an imaging lens group (not shown in the figure), wherein the imaging lens group is housed in the plastic lens barrel 110.

[0115] Specifically, the imaging lens group includes, from the object side to the image side, lens element 121, light-shielding element 131, lens element 122, light-shielding element 132, lens element 123, light-shielding element 133, lens element 124, light-shielding element 134, lens element 125, light-shielding element 135, 136, lens element 126, light-shielding element 137, 138, 139, lens element 127, and fixing element 140. The structure, surface shape, and other optical features of the lens element, light-shielding element, and fixing element can be configured according to different imaging requirements and are not limited thereto.

[0116] Please refer to the following: Figures 1B to 1D ,in Figure 1B Drawing according to Figure 1A A three-dimensional schematic diagram of the lens element 125 in the first embodiment. Figure 1C Drawing according to Figure 1A A schematic diagram of the lens element 125 in the first embodiment. Figure 1D Drawing according to Figure 1A A schematic diagram of the parameters of the lens element 125 in the first embodiment. (From...) Figures 1A to 1D As can be seen, the lens element 125 has a central axis O and includes an optically effective portion 151, an outer peripheral portion 152, and a plurality of protrusions 153, wherein the central axis O passes through the optically effective portion 151, and the outer peripheral portion 152 surrounds the optically effective portion 151. By providing the protrusions 153, the fit between the mold (not shown) and the lens element 125 can be improved during manufacturing, preventing warping or deformation during demolding.

[0117] In the first embodiment, the number of protrusions 153 is twenty-nine, but it is not limited to this.

[0118] Depend on Figure 1B and Figure 1D It is understood that the optical effective part 151 includes a first optical surface 151a and a second optical surface 151b, wherein the second optical surface 151b is disposed opposite to the first optical surface 151a, and both the first optical surface 151a and the second optical surface 151b are optical aspherical surfaces. In this way, a lens element with high resolution can be provided.

[0119] The outer peripheral portion 152 surrounds the optical effective portion 151 and includes a first outer peripheral surface 152a, a second outer peripheral surface 152b and an outer ring surface 152c, wherein the first outer peripheral surface 152a and the first optical surface 151a face the same side, the second outer peripheral surface 152b and the second optical surface 151b face the same side, and the outer ring surface 152c connects the first outer peripheral surface 152a and the second outer peripheral surface 152b.

[0120] Depend on Figure 1C As can be seen, the protruding structures 153 are disposed on the first outer peripheral surface 152a. The protruding structures 153 extend along a spiral path and are arranged at intervals, and the spiral path surrounds the optical effective part 151 and gradually tapers towards the central axis O. By arranging the protruding structures 153 in a spiral path, a faster mold processing flow can be achieved, thereby improving the efficiency of mold processing. Furthermore, the number and density distribution of the protruding structures 153 can be more easily adjusted according to different design requirements and molding conditions. In addition, the protruding structures 153 gradually approach the central axis O along the spiral path, thereby facilitating the automation of mold processing.

[0121] Specifically, the spiral path can be either clockwise or counterclockwise towards the center. The spiral path can be an Archimedean spiral, a Fermat spiral, or an isoangular spiral, but is not limited to these. Furthermore, the protrusion 153 extends along the spiral path, meaning that the protrusion 153 extends from a first position on the spiral path to a second position on the spiral path. More specifically, the second position is closer to the central axis O than the first position.

[0122] Depend on Figure 1D It can be seen that at least three of the protruding structures 153 have a first identification end 156a and a second identification end 156b on a cross section perpendicular to the first outer peripheral surface 152a, wherein the first identification end 156a is connected to the first outer peripheral surface 152a, and the second identification end 156b is spaced apart from the first outer peripheral surface 152a. Specifically, when viewed from the direction perpendicular to the first outer peripheral surface 152a, the first identification end 156a and the second identification end 156b are the two ends of the protruding structure 153 that are closer to and further away from the optically effective part 151, respectively.

[0123] Furthermore, each protruding structure 153 has a vertex 156c on a cross-section perpendicular to the first outer peripheral surface 152a, wherein vertex 156c is the highest point of each protruding structure 153, and the distance between vertex 156c and the second identifying end 156b along the vertical central axis O is less than the distance between vertex 156c and the first identifying end 156a along the vertical central axis O. This more effectively prevents warping or deformation of the lens element 125.

[0124] Depend on Figures 1B to 1DIt is understood that the lens element 125 is manufactured by injection molding, and the lens element 125 also includes at least one injection mark 154, wherein the injection mark 154 is disposed on the outer annular surface 152c. In this way, a high-precision and miniaturized precision lens element can be provided.

[0125] Depend on Figure 1A and Figure 1D It is understood that the lens element 125 also includes a bearing surface 155, wherein the bearing surface 155 and the first optical surface 151a face the same side, the bearing surface 155 is closer to the optical effective part 151 than the protruding structure 153, and abuts against the light-shielding element 134. In this way, the flatness of the bearing surface 155 can be ensured, thereby reducing assembly tolerances and providing a high-resolution imaging lens 10.

[0126] Depend on Figure 1C and Figure 1D It can be seen that the first of the protrusions 153 on the spiral path is a first protrusion 153a, and the last of the protrusions 153 on the spiral path is a last protrusion 153b. Each protrusion 153 forms an angle between one side of the second identification end 156b and the first outer peripheral surface 152a. The distance from the first protrusion 153a to the central axis O is DS, the distance from the last protrusion 153b to the central axis O is DE, the center distance between the first optical surface 151a and the first outer peripheral surface 152a is t, the center distance between the first optical surface 151a and the second optical surface 151b is CT, the distance from the outer ring surface 152c to the central axis O is ψ, the length of each protrusion 153 along the spiral path is S1, the interval distance of the protrusions 153 along the spiral path is S2, and the angle is α. The parameters satisfy the conditions in Table 1 below.

[0127]

[0128]

[0129] <Second Embodiment>

[0130] Please refer to Figures 2A to 2C ,in Figure 2A A perspective view of the lens element 220 according to the second embodiment of this disclosure is shown. Figure 2B Drawing according to Figure 2A A schematic diagram of the lens element 220 in the second embodiment. Figure 2C Drawing according to Figure 2A A schematic diagram of the parameters of the lens element 220 in the second embodiment. (From...) Figures 2A to 2CAs can be seen, the lens element 220 has a central axis O and includes an optically effective portion 251, an outer peripheral portion 252, and a plurality of protrusions 253, wherein the central axis O passes through the optically effective portion 251, and the outer peripheral portion 252 surrounds the optically effective portion 251. By providing the protrusions 253, the fit between the mold (not shown) and the lens element 220 can be improved during manufacturing, preventing warping or deformation during demolding.

[0131] In the second embodiment, the number of protrusions 253 is sixty-five, but is not limited to this.

[0132] The optical effective portion 251 includes a first optical surface 251a and a second optical surface 251b, wherein the second optical surface 251b is disposed opposite to the first optical surface 251a, and both the first optical surface 251a and the second optical surface 251b are optical aspherical surfaces. This provides a lens element with high resolution.

[0133] The outer peripheral portion 252 surrounds the optical effective portion 251 and includes a first outer peripheral surface 252a, a second outer peripheral surface 252b and an outer ring surface 252c, wherein the first outer peripheral surface 252a and the first optical surface 251a face the same side, the second outer peripheral surface 252b and the second optical surface 251b face the same side, and the outer ring surface 252c connects the first outer peripheral surface 252a and the second outer peripheral surface 252b.

[0134] Depend on Figure 2B It can be seen that the protruding structure 253 is disposed on the first outer peripheral surface 252a. The protruding structure 253 extends along a spiral path and is arranged at intervals. The spiral path surrounds the optical effective part 251 and gradually shrinks towards the central axis O. The protruding structure 253 gradually approaches the central axis O along the spiral path.

[0135] Depend on Figure 2C It can be seen that at least three of the protruding structures 253 have a first identification end 256a and a second identification end 256b on a cross section perpendicular to the first outer peripheral surface 252a, wherein the first identification end 256a is connected to the first outer peripheral surface 252a, and the second identification end 256b is spaced apart from the first outer peripheral surface 252a. Specifically, when viewed from the direction perpendicular to the first outer peripheral surface 252a, the first identification end 256a and the second identification end 256b are the two ends of the protruding structure 253 that are closer to and further away from the optically effective part 251, respectively.

[0136] Furthermore, each protruding structure 253 has a vertex 256c on a cross-section perpendicular to the first outer peripheral surface 252a, wherein vertex 256c is the highest point of each protruding structure 253, and the distance between vertex 256c and the second identifying end 256b along the vertical central axis O is less than the distance between vertex 256c and the first identifying end 256a along the vertical central axis O. This more effectively prevents warping or deformation of the lens element 220.

[0137] Depend on Figures 2A to 2C It is understood that the lens element 220 is manufactured by injection molding, and the lens element 220 also includes at least one injection mark 254, wherein the injection mark 254 is disposed on the outer annular surface 252c. In this way, a high-precision and miniaturized precision lens element can be provided.

[0138] Depend on Figure 2B and Figure 2C It can be seen that the first of the protrusions 253 on the spiral path is a first protrusion 253a, and the last of the protrusions 253 on the spiral path is a last protrusion 253b. Each protrusion 253 forms an angle between one side of the second identification end 256b and the first outer peripheral surface 252a. The distance from the first protrusion 253a to the central axis O is DS, the distance from the last protrusion 253b to the central axis O is DE, the center distance between the first optical surface 251a and the first outer peripheral surface 252a is t, the center distance between the first optical surface 251a and the second optical surface 251b is CT, the distance from the outer ring surface 252c to the central axis O is ψ, the length of each protrusion 253 along the spiral path is S1, the interval distance of the protrusions 253 along the spiral path is S2, and the angle is α. The parameters satisfy the conditions in Table 2 below.

[0139]

[0140] Furthermore, the structure and configuration of the remaining components in the second embodiment are the same as those in the first embodiment, and will not be described again here.

[0141] <Third Embodiment>

[0142] Please refer to Figures 3A to 3C ,in Figure 3A A perspective view of the lens element 320 according to the third embodiment of this disclosure is shown. Figure 3B Drawing according to Figure 3A A schematic diagram of the lens element 320 in the third embodiment. Figure 3C Drawing according to Figure 3A A schematic diagram of the parameters of the lens element 320 in the third embodiment. (From...) Figures 3A to 3CAs can be seen, the lens element 320 has a central axis O and includes an optically effective portion 351, an outer peripheral portion 352, and a plurality of protrusions 353, wherein the central axis O passes through the optically effective portion 351, and the outer peripheral portion 352 surrounds the optically effective portion 351. By providing the protrusions 353, the fit between the mold (not shown) and the lens element 320 can be improved during manufacturing, preventing warping or deformation during demolding.

[0143] In the third embodiment, the number of protrusions 353 is twenty-two, but it is not limited to this.

[0144] The optical effective portion 351 includes a first optical surface 351a and a second optical surface 351b, wherein the second optical surface 351b is disposed opposite to the first optical surface 351a, and both the first optical surface 351a and the second optical surface 351b are optical aspherical surfaces. This allows for the provision of a lens element with high resolution.

[0145] The outer peripheral portion 352 surrounds the optical effective portion 351 and includes a first outer peripheral surface 352a, a second outer peripheral surface 352b and an outer ring surface 352c, wherein the first outer peripheral surface 352a and the first optical surface 351a face the same side, the second outer peripheral surface 352b and the second optical surface 351b face the same side, and the outer ring surface 352c connects the first outer peripheral surface 352a and the second outer peripheral surface 352b.

[0146] Depend on Figure 3B It can be seen that the protruding structure 353 is disposed on the first outer peripheral surface 352a. The protruding structure 353 extends along a spiral path and is arranged at intervals. The spiral path surrounds the optical effective part 351 and gradually shrinks towards the central axis O. The protruding structure 353 gradually approaches the central axis O along the spiral path.

[0147] Depend on Figure 3C It can be seen that at least three of the protruding structures 353 have a first identification end 356a and a second identification end 356b on a cross section perpendicular to the first outer peripheral surface 352a, wherein the first identification end 356a is connected to the first outer peripheral surface 352a, and the second identification end 356b is spaced apart from the first outer peripheral surface 352a. Specifically, when viewed from the direction perpendicular to the first outer peripheral surface 352a, the first identification end 356a and the second identification end 356b are the two ends of the protruding structure 353 that are closer to and further away from the optically effective part 351, respectively.

[0148] Furthermore, each protruding structure 353 has a vertex 356c on a cross-section perpendicular to the first outer peripheral surface 352a, wherein vertex 356c is the highest point of each protruding structure 353, and the distance between vertex 356c and the second identifying end 356b along the vertical central axis O is less than the distance between vertex 356c and the first identifying end 356a along the vertical central axis O. This more effectively prevents warping or deformation of the lens element 320.

[0149] Depend on Figures 3A to 3C It is understood that the lens element 320 is manufactured by injection molding, and the lens element 320 also includes at least one injection mark 354, wherein the injection mark 354 is disposed on the outer annular surface 352c. In this way, a high-precision and miniaturized precision lens element can be provided.

[0150] Depend on Figure 3B and Figure 3C It can be seen that the first of the protrusions 353 on the spiral path is a first protrusion 353a, and the last of the protrusions 353 on the spiral path is a last protrusion 353b. Each protrusion 353 forms an angle between one side of the second identification end 356b and the first outer peripheral surface 352a. The distance from the first protrusion 353a to the central axis O is DS, the distance from the last protrusion 353b to the central axis O is DE, the center distance between the first optical surface 351a and the first outer peripheral surface 352a is t, the center distance between the first optical surface 351a and the second optical surface 351b is CT, the distance from the outer ring surface 352c to the central axis O is ψ, the length of each protrusion 353 along the spiral path is S1, the interval distance of the protrusions 353 along the spiral path is S2, and the angle is α. The parameters satisfy the conditions in Table 3 below.

[0151]

[0152] Furthermore, the structure and configuration of the remaining components in the third embodiment are the same as those in the first embodiment, and will not be described again here.

[0153] <Fourth Embodiment>

[0154] Please refer to Figure 4A and Figure 4B ,in Figure 4A A schematic diagram of the lens element 420 according to the fourth embodiment of this disclosure is shown. Figure 4B Drawing according to Figure 4A A schematic diagram of the parameters of the lens element 420 in the fourth embodiment. Figure 4A and Figure 4BAs can be seen, the lens element 420 has a central axis O and includes an optically effective portion 451, an outer peripheral portion 452, and a plurality of protrusions 453, wherein the central axis O passes through the optically effective portion 451, and the outer peripheral portion 452 surrounds the optically effective portion 451. By providing the protrusions 453, the fit between the mold (not shown) and the lens element 420 can be improved during manufacturing, preventing warping or deformation during demolding.

[0155] In the fourth embodiment, the number of protrusions 453 is twenty-four, but it is not limited to this.

[0156] The optical effective portion 451 includes a first optical surface 451a and a second optical surface 451b, wherein the second optical surface 451b is disposed opposite to the first optical surface 451a. This provides a lens element with high resolution.

[0157] The outer peripheral portion 452 surrounds the optical effective portion 451 and includes a first outer peripheral surface 452a, a second outer peripheral surface 452b and an outer ring surface 452c, wherein the first outer peripheral surface 452a and the first optical surface 451a face the same side, the second outer peripheral surface 452b and the second optical surface 451b face the same side, and the outer ring surface 452c connects the first outer peripheral surface 452a and the second outer peripheral surface 452b.

[0158] Depend on Figure 4A It can be seen that the protruding structure 453 is disposed on the first outer peripheral surface 452a. The protruding structure 453 extends along a spiral path and is arranged at intervals. The spiral path surrounds the optical effective part 451 and gradually shrinks towards the central axis O. The protruding structure 453 gradually approaches the central axis O along the spiral path.

[0159] Depend on Figure 4B It can be seen that at least three of the protruding structures 453 have a first identification end 456a and a second identification end 456b on a cross section perpendicular to the first outer peripheral surface 452a, wherein the first identification end 456a is connected to the first outer peripheral surface 452a, and the second identification end 456b is spaced apart from the first outer peripheral surface 452a. Specifically, when viewed from the direction perpendicular to the first outer peripheral surface 452a, the first identification end 456a and the second identification end 456b are the two ends of the protruding structure 453 that are closer to and further away from the optically effective part 451, respectively.

[0160] Furthermore, each protruding structure 453 has a vertex 456c on a cross-section perpendicular to the first outer peripheral surface 452a, wherein vertex 456c is the highest point of each protruding structure 453, and the distance between vertex 456c and the second identifying end 456b along the vertical central axis O is less than the distance between vertex 456c and the first identifying end 456a along the vertical central axis O. This more effectively prevents warping or deformation of the lens element 420.

[0161] Depend on Figure 4A and Figure 4B It is understood that the lens element 420 is manufactured by injection molding, and the lens element 420 also includes at least one injection mark 454, wherein the injection mark 454 is disposed on the outer annular surface 452c. In this way, a high-precision and miniaturized precision lens element can be provided.

[0162] The first of the protrusions 453 on the spiral path is a first protrusion 453a, and the last of the protrusions 453 on the spiral path is a last protrusion 453b. Each protrusion 453 forms an angle between one side of the second identification end 456b and the first outer peripheral surface 452a. The distance from the first protrusion 453a to the central axis O is DS, the distance from the last protrusion 453b to the central axis O is DE, the center distance between the first optical surface 451a and the first outer peripheral surface 452a is t, the center distance between the first optical surface 451a and the second optical surface 451b is CT, the distance from the outer ring surface 452c to the central axis O is ψ, the length of each protrusion 453 along the spiral path is S1, the interval distance of the protrusions 453 along the spiral path is S2, and the angle is α. The parameters satisfy the conditions in Table 4 below.

[0163]

[0164] Furthermore, the structure and configuration of the remaining components in the fourth embodiment are the same as those in the first embodiment, and will not be described again here.

[0165] <Fifth Embodiment>

[0166] Please refer to Figure 5A and Figure 5B ,in Figure 5A A diagram illustrating lens element 520 according to the fifth embodiment of this disclosure is provided. Figure 5B Drawing according to Figure 5A A schematic diagram of the lens element 520 in the fifth embodiment. Figure 5A and Figure 5B As can be seen, the lens element 520 has a central axis O and includes an optically effective portion 551, an outer peripheral portion 552, and a plurality of protrusions 553, wherein the central axis O passes through the optically effective portion 551, and the outer peripheral portion 552 surrounds the optically effective portion 551. By providing the protrusions 553, the fit between the mold (not shown) and the lens element 520 can be improved during manufacturing, preventing warping or deformation during demolding.

[0167] In the fifth embodiment, the number of protrusions 553 is thirteen, but it is not limited to this.

[0168] The optical effective portion 551 includes a first optical surface 551a and a second optical surface 551b, wherein the second optical surface 551b is disposed opposite to the first optical surface 551a. This provides a lens element with high resolution.

[0169] The outer peripheral portion 552 surrounds the optical effective portion 551 and includes a first outer peripheral surface 552a, a second outer peripheral surface 552b and an outer ring surface 552c, wherein the first outer peripheral surface 552a and the first optical surface 551a face the same side, the second outer peripheral surface 552b and the second optical surface 551b face the same side, and the outer ring surface 552c connects the first outer peripheral surface 552a and the second outer peripheral surface 552b.

[0170] Depend on Figure 5A It can be seen that the protruding structure 553 is disposed on the first outer peripheral surface 552a. The protruding structure 553 extends along a spiral path and is arranged at intervals. The spiral path surrounds the optical effective part 551 and gradually shrinks towards the central axis O. The protruding structure 553 gradually approaches the central axis O along the spiral path.

[0171] Depend on Figure 5B It can be seen that at least three of the protruding structures 553 have a first identification end 556a and a second identification end 556b on a cross section perpendicular to the first outer peripheral surface 552a, wherein the first identification end 556a is connected to the first outer peripheral surface 552a, and the second identification end 556b is spaced apart from the first outer peripheral surface 552a. Specifically, when viewed from the direction perpendicular to the first outer peripheral surface 552a, the first identification end 556a and the second identification end 556b are the two ends of the protruding structure 553 that are farther away from and closer to the optical effective part 551, respectively.

[0172] Furthermore, each protrusion 553 has a vertex 556c on a cross-section perpendicular to the first outer peripheral surface 552a, wherein vertex 556c is the highest point of each protrusion 553, and the distance between vertex 556c and the second identifying end 556b along the vertical central axis O is less than the distance between vertex 556c and the first identifying end 556a along the vertical central axis O. This more effectively prevents warping or deformation of the lens element 520.

[0173] Depend on Figure 5A and Figure 5B It is understood that the lens element 520 is manufactured by injection molding, and the lens element 520 also includes at least one injection mark 554, wherein the injection mark 554 is disposed on the outer annular surface 552c. In this way, a high-precision and miniaturized precision lens element can be provided.

[0174] The first of the protrusions 553 on the spiral path is a first protrusion 553a, and the last of the protrusions 553 on the spiral path is a last protrusion 553b. Each protrusion 553 forms an angle between one side of the second identification end 556b and the first outer peripheral surface 552a. The distance from the first protrusion 553a to the central axis O is DS, the distance from the last protrusion 553b to the central axis O is DE, the center distance between the first optical surface 551a and the first outer peripheral surface 552a is t, the center distance between the first optical surface 551a and the second optical surface 551b is CT, the distance from the outer ring surface 552c to the central axis O is ψ, the length of each protrusion 553 along the spiral path is S1, the interval distance of the protrusions 553 along the spiral path is S2, and the angle is α. The parameters satisfy the conditions in Table 5 below.

[0175]

[0176] Furthermore, the structure and configuration of the remaining components in the fifth embodiment are the same as those in the first embodiment, and will not be described again here.

[0177] <Sixth Embodiment>

[0178] Please refer to Figure 6A and Figure 6B ,in Figure 6A A schematic diagram of the electronic device 60 according to the sixth embodiment of this disclosure is shown. Figure 6B Drawing according to Figure 6A Another schematic diagram of the electronic device 60 in the sixth embodiment. Figure 6A and Figure 6B As can be seen, the electronic device 60 is a smartphone. The electronic device 60 includes a camera module (not shown) and a user interface 61. The camera module includes an imaging lens (not shown) and an electronic image sensor (not shown), and the electronic image sensor is disposed on an imaging surface (not shown) of the imaging lens. Furthermore, the camera module may be an ultra-wide-angle camera module 62, a high-pixel camera module 63, and a telephoto camera module 64, and the user interface 61 may be a touch screen, but it is not limited thereto.

[0179] Furthermore, the imaging lens includes a plastic lens barrel (not shown) and an imaging lens group (not shown), wherein the imaging lens group is housed in the plastic lens barrel and includes at least one lens element (not shown). Specifically, the lens element may be any of the lens elements in the first to fifth embodiments described above, but this disclosure is not limited thereto.

[0180] The user enters the shooting mode through the user interface 61, which displays the screen and allows manual adjustment of the shooting angle to switch between different camera modules. At this time, the camera module focuses the imaging light onto the electronic image sensor and outputs the relevant electronic signals of the image to the image signal processor (ISP) 65.

[0181] Depend on Figure 6B As can be seen, depending on the camera specifications of the electronic device 60, the electronic device 60 may also include an optical image stabilization component (not shown in the figure). Furthermore, the electronic device 60 may also include at least one focus assist module (not shown in the figure) and at least one sensing element (not shown in the figure). The focus assist module may be a color temperature compensated flash module 66, an infrared rangefinder, a laser focus module, etc. The sensing element may have the function of sensing physical momentum and kinetic energy, such as an accelerometer, a gyroscope, or a Hall effect element, to sense the shaking and tremors caused by the user's hand or the external environment. This is beneficial to the performance of the autofocus function and the optical image stabilization component configured in the camera module of the electronic device 60, so as to obtain good image quality and help the electronic device 60 according to the present disclosure to have multiple shooting modes, such as optimized Selfie, low light HDR (High Dynamic Range) imaging, and high resolution 4K video recording. In addition, users can directly view the camera's shooting screen through the user interface 61 and manually operate the framing range on the user interface 61 to achieve the WYSIWYG autofocus function.

[0182] Furthermore, the camera module, electronic image sensor, optical image stabilization component, sensing element, and focus assist module can be mounted on a flexible printed circuit board (FPC) (not shown), and electrically connected to the imaging signal processing element 65 and other related components via a connector (not shown) to execute the shooting process. Current electronic devices, such as smartphones, are trending towards thinner and lighter designs. Mounting the camera module and related components on a flexible printed circuit board, and then using a connector to integrate the circuitry onto the mainboard of the electronic device, satisfies the structural design and circuit layout requirements of the limited internal space of the electronic device, providing greater flexibility. It also allows for more flexible control of the camera module's autofocus function through the device's touchscreen. In the sixth embodiment, the electronic device 60 may include multiple sensing elements and multiple focus assist modules. The sensing elements and focus assist modules are mounted on a flexible printed circuit board and at least one other flexible printed circuit board (not shown), and electrically connected to the imaging signal processing element 65 and other related components via corresponding connectors to execute the shooting process. In other embodiments (not shown), the sensing element and auxiliary optical element may also be mounted on the motherboard of the electronic device or other types of carrier boards, depending on the mechanical design and circuit layout requirements.

[0183] Furthermore, the electronic device 60 may further include, but is not limited to, a display unit, a control unit, a storage unit, random access memory (RAM), read-only memory (ROM), or a combination thereof.

[0184] Figure 6C Drawing according to Figure 6A A schematic diagram of the image in the sixth embodiment. (By...) Figure 6C It can be seen that the ultra-wide-angle camera module 62 can capture images of a larger range and has the function of capturing more scenery.

[0185] Figure 6D Drawing according to Figure 6A Another image illustration from the sixth embodiment. Figure 6D It can be seen that the high-pixel camera module 63 can capture images within a certain range and also has high pixel count, with high resolution and low distortion.

[0186] Figure 6E Drawing according to Figure 6A Another image illustration from the sixth embodiment. Figure 6E It is known that the telephoto camera module 64 has a high magnification function, which can capture images at a distance and magnify them to a high degree.

[0187] Depend on Figures 6C to 6EIt can be seen that by using camera modules with different focal lengths for framing and combining them with image processing technology, the zoom function can be achieved in the electronic device 60.

[0188] <Seventh Embodiment>

[0189] Please refer to Figure 7 The diagram illustrates an electronic device 70 according to the seventh embodiment of this disclosure. Figure 7 As can be seen, the electronic device 70 is a smartphone, and the electronic device 70 includes a camera module (not shown), wherein the camera module includes an imaging lens (not shown) and an electronic image sensor (not shown), and the electronic image sensor is disposed on an imaging surface of the imaging lens (not shown). Furthermore, the camera module is an ultra-wide-angle camera module 711, 712, a wide-angle camera module 713, 714, a telephoto camera module 715, 716, 717, 718, and a TOF module (Time-Of-Flight) 719, and the TOF module 719 can also be other types of camera modules, and is not limited to this configuration.

[0190] Furthermore, the imaging lens includes a plastic lens barrel (not shown) and an imaging lens group (not shown), wherein the imaging lens group is housed in the plastic lens barrel and includes at least one lens element (not shown). Specifically, the lens element may be any of the lens elements in the first to fifth embodiments described above, but this disclosure is not limited thereto.

[0191] Furthermore, telephoto camera modules 717 and 718 are used to deflect light, but this disclosure is not limited to this.

[0192] Depending on the camera specifications of the electronic device 70, the electronic device 70 may also include an optical image stabilization component (not shown). Furthermore, the electronic device 70 may also include at least one focus assist module (not shown) and at least one sensing element (not shown). The focus assist module may be a color temperature-compensating flash module 720, an infrared rangefinder, a laser focus module, etc. The sensing element may have the function of sensing physical momentum and kinetic energy, such as an accelerometer, gyroscope, or Hall effect element, to sense the shaking and tremors caused by the user's hand or the external environment. This facilitates the performance of the autofocus function and optical image stabilization component configured in the camera module of the electronic device 70, resulting in good image quality. This helps the electronic device 70 according to this disclosure to have multiple shooting modes, such as optimized Selfie, low-light HDR (High Dynamic Range) imaging, and high-resolution 4K (4K Resolution) video recording.

[0193] Furthermore, the structure and configuration of the remaining components in the seventh embodiment are the same as those in the sixth embodiment, and will not be described again here.

[0194] <Eighth Embodiment>

[0195] Please refer to Figures 8A to 8C ,in Figure 8A A schematic diagram of the vehicle tool 80 according to the eighth embodiment of this disclosure is shown. Figure 8B Drawing according to Figure 8A Another schematic diagram of the vehicle tool 80 in the eighth embodiment. Figure 8C Drawing according to Figure 8A Another schematic diagram of the vehicle tool 80 in the eighth embodiment. Figures 8A to 8C It is understood that the vehicle tool 80 includes multiple camera modules 81, and each camera module 81 includes an imaging lens (not shown) and an electronic photosensitive element (not shown), with the electronic photosensitive element disposed on an imaging surface of the imaging lens (not shown). In the eighth embodiment, the number of camera modules 81 is six, but is not limited to this number.

[0196] Furthermore, the imaging lens includes a plastic lens barrel (not shown) and an imaging lens group (not shown), wherein the imaging lens group is housed in the plastic lens barrel and includes at least one lens element (not shown). Specifically, the lens element may be any of the lens elements in the first to fifth embodiments described above, but this disclosure is not limited thereto.

[0197] Depend on Figure 8A and Figure 8B It is known that camera module 81 is an automotive camera module, and the two cameras in camera module 81 are respectively located below the left and right rearview mirrors, and are used to capture image information from a viewing angle θ. Specifically, the viewing angle θ can satisfy the following condition: 40 degrees < θ < 90 degrees. In this way, image information within the range of the left and right side lanes can be captured.

[0198] Depend on Figure 8B It is understood that the other two camera modules 81 can be installed in the space inside the vehicle tool 80. Specifically, the two camera modules 81 are respectively installed near the rearview mirror and near the rear window. Furthermore, the camera modules 81 can also be installed on the non-mirror surfaces of the left and right rearview mirrors of the vehicle tool 80, but are not limited thereto.

[0199] Depend on Figure 8CIt is understood that the camera module 81 can be positioned at the front and rear of the vehicle tool 80. The placement of the camera module 81 at the front and rear of the vehicle tool 80, and below the left and right rearview mirrors, helps the driver obtain information about the external space outside the cockpit, such as external space information I1, I2, I3, and I4, but is not limited to these. This provides more viewing angles to reduce blind spots, thereby contributing to improved driving safety.

[0200] Although the present invention has been disclosed above by way of embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make some modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope defined in the appended claims.

Claims

1. A lens element, characterized in that, It has a central axis and includes: An optically effective portion through which the central axis passes and includes: A first optical surface; and A second optical surface which is disposed opposite to the first optical surface; An outer peripheral portion surrounding the optically effective portion and includes: A first outer peripheral surface on the same side as the first optical surface; A second outer peripheral surface on the same side as the second optical surface; and An outer ring surface connecting the first outer peripheral surface and the second outer peripheral surface; And A plurality of convex structures are provided on the first outer peripheral surface. The plurality of convex structures extend along a helical path and are arranged at intervals, and the helical path surrounds the optically effective portion and tapers towards the central axis; wherein, the first one of the plurality of convex structures on the helical path is a first convex structure, and the last one of the plurality of convex structures on the helical path is a last convex structure; Wherein, the distance from the first convex structure to the central axis is DS, the distance from the last convex structure to the central axis is DE, the distance from the outer ring surface to the central axis is ψ, and the distance from the first convex structure to the central axis is DS, which satisfies the following conditions: 0.005 mm < DS - DE < 1 mm; and 0.7 < DS / ψ < 1.

2. The lens element according to claim 1, characterized in that, The central distance between the first optical surface and the first outer peripheral surface is t, and the central distance between the first optical surface and the second optical surface is CT, which satisfies the following conditions: 0.8 < t / CT < 5.

5.

3. The lens element according to claim 2, characterized in that, The central distance between the first optical surface and the first outer peripheral surface is t, and the central distance between the first optical surface and the second optical surface is CT, which satisfies the following conditions: 1.0 < t / CT < 5.

0.

4. The lens element according to claim 1, characterized in that, The length of each convex structure along the helical path is S1, and the interval distance of the plurality of convex structures along the helical path is S2, which satisfies the following conditions: 0.2 < S1 / S2 < 5.

5. The lens element according to claim 1, characterized in that, The distance from the first convex structure to the central axis is DS, and the distance from the last convex structure to the central axis is DE, which satisfies the following conditions: 0.015 mm ≤ DS - DE ≤ 0.8 mm.

6. The lens element according to claim 1, characterized in that, The plurality of convex structures gradually approach the central axis along the helical path.

7. The lens element according to claim 1, characterized in that, The lens element is made by injection molding. The lens element further includes at least one injection mark, and the at least one injection mark is provided on the outer ring surface.

8. The lens element according to claim 1, characterized in that, At least one of the first optical surface and the second optical surface is an aspherical surface.

9. An imaging lens, characterized in that, Includes: A plastic lens barrel; and An imaging lens group accommodated in the plastic lens barrel and includes: At least one lens element as described in claim 1.

10. The imaging lens according to claim 9, characterized in that, The at least one lens element further includes a bearing surface on the same side as the first optical surface. The bearing surface is closer to the optically effective portion than the plurality of convex structures and abuts against an adjacent element.

11. A camera module, characterized in that, Includes: An imaging lens as described in claim 9; and An electronic photosensitive element disposed on an imaging surface of the imaging lens.

12. An electronic device, characterized in that, Includes: A camera module as described in claim 11.

13. A lens element, characterized in that, It has a central axis and includes: An optically effective portion including: A first optical surface; and A second optical surface which is disposed opposite to the first optical surface; An outer peripheral portion surrounding the optically effective portion, and comprising: A first outer peripheral surface, which faces the same side as the first optical surface; A second outer peripheral surface, the second outer peripheral surface and the second optical surface facing the same side; and An outer ring surface connects the first outer peripheral surface and the second outer peripheral surface; as well as Multiple protruding structures are disposed on the first outer peripheral surface. The multiple protruding structures extend along a spiral path and are spaced apart. The spiral path surrounds the optical effective part and gradually tapers towards the central axis. At least three of the multiple protruding structures have a first identification end and a second identification end on a cross section perpendicular to the first outer peripheral surface. The first identification end is connected to the first outer peripheral surface, and the second identification end is spaced apart from the first outer peripheral surface. Each of the protruding structures forms an angle α between one side of the second identification end and the first outer peripheral surface; the first of the plurality of protruding structures on the spiral path is a first protruding structure, the distance from the outer ring surface to the central axis is ψ, and the distance from the first protruding structure to the central axis is DS, which satisfies the following conditions: 45 degrees ≤ α ≤ 90 degrees; and 0.7 <DS / ψ<1。 14. The lens element according to claim 13, characterized in that, The included angle is α, which satisfies the following condition: 60 degrees ≤ α ≤ 90 degrees.

15. The lens element according to claim 13, characterized in that, The center distance between the first optical surface and the center of the first outer peripheral surface is t, and the center distance between the first optical surface and the center of the second optical surface is CT, which satisfies the following condition: 0.8 <t / CT<5.5。 16. The lens element according to claim 15, characterized in that, The center distance between the first optical surface and the center of the first outer peripheral surface is t, and the center distance between the first optical surface and the center of the second optical surface is CT, which satisfies the following condition: 1.0 <t / CT<5.0。 17. The lens element according to claim 13, characterized in that, The length of each protrusion along the spiral path is S1, and the spacing between the plurality of protrusions along the spiral path is S2, satisfying the following condition: 0.2 <S1 / S2<5。 18. The lens element according to claim 13, characterized in that, The plurality of protruding structures gradually approach the central axis along the spiral path.

19. The lens element according to claim 13, characterized in that, Each of the protruding structures also has a vertex on the cross section perpendicular to the first outer peripheral surface. The vertex is the highest point of each of the protruding structures, and the distance between the vertex and the second identification end along the perpendicular central axis is less than the distance between the vertex and the first identification end along the perpendicular central axis.

20. An imaging lens, characterized in that, Include: A plastic lens barrel; and An imaging lens group, housed within the plastic lens barrel, and comprising: At least one lens element as described in claim 13.

21. The imaging lens according to claim 20, characterized in that, The at least one lens element further includes a bearing surface that faces the same side as the first optical surface, the bearing surface being closer to the optical effective portion than the plurality of protrusions, and bearing against an adjacent element.

22. A camera module, characterized in that, Include: The imaging lens as described in claim 20; and An electronic photosensitive element is disposed on an imaging surface of the imaging lens.

23. An electronic device, characterized in that, Include: The camera module as described in claim 22.

Images