Imaging lens and electronic device

Abstract

The utility model discloses an imaging lens, contain at least one lens element and annular shading element. Annular shading element contains body and microstructure surface. The central axis of lens element passes through the aperture of body. Microstructure surface is set up on the body around the aperture. Microstructure surface contains a plurality of first array and a plurality of second array. Each first array contains at least two first strip structure, and the first strip structure gradually reduces to the direction away from the body. Each second array contains at least two second strip structure, and the second strip structure gradually reduces to the direction away from the body. First array and second array alternate each other. In the first array and the second array of adjacent arrangement, the short side of each first strip structure is set to the long side of the second strip structure. The utility model discloses still have the electronic device of above-mentioned imaging lens.

Description

Technical Field

[0001] This utility model relates to an imaging lens and an electronic device, and more particularly to an imaging lens suitable for electronic devices. Background Technology

[0002] With advancements in semiconductor technology, the performance of electronic image sensors has improved, allowing pixels to reach smaller sizes. Therefore, optical lenses with high image quality have become an indispensable component. Furthermore, with the rapid development of technology, mobile devices equipped with optical lenses are being used in a wider range of applications, leading to more diverse requirements for these lenses.

[0003] In recent years, it has become increasingly popular to take photos using miniature optical lenses on mobile devices. However, mobile devices are often exposed to strong sunlight when used outdoors, which causes the optical lenses to be affected by strong non-imaging stray light. In particular, non-imaging light is easily reflected within the optical lens, which greatly reduces the image quality.

[0004] Conventional techniques such as ink coating, sandblasting, and film coating on the surface of optical elements in optical lenses are used to reduce reflectivity and eliminate stray light. While these techniques can improve optical image quality, they are still insufficient to eliminate high-intensity stray light. Therefore, how to improve the structure of internal components of optical lenses to reduce the intensity of reflection of non-imaging light to meet the high-specification requirements of today's electronic devices has become an important issue in related fields. Utility Model Content

[0005] In view of the above-mentioned problems, the present invention provides an imaging lens and electronic device to solve the problem of difficulty in eliminating high-intensity stray light in the prior art.

[0006] This invention provides an imaging lens comprising at least one lens element and an annular light-blocking element. The lens element has a central axis. The annular light-blocking element comprises a body and a microstructure surface. The body has an opening, through which the central axis passes. The microstructure surface is disposed around the opening on the body, and the microstructure surface comprises a plurality of first arrays and a plurality of second arrays. Each first array comprises at least two first strip structures, each first strip structure having a long side and a short side smaller than the long side, and the first strip structures gradually taper away from the body. Each second array comprises at least two second strip structures, each second strip structure having a long side and a short side smaller than the long side, and the second strip structures gradually taper away from the body. The first arrays and second arrays are arranged alternately, and in one of the adjacent first arrays and one of the adjacent second arrays, the short side of each of the first strip structures faces the long side of one of the second strip structures.

[0007] This utility model also provides an imaging lens, comprising at least one lens element and a light-shielding element. The imaging optical path passes through the lens element. The light-shielding element comprises a body and a microstructure surface. The microstructure surface is disposed on the body and comprises a plurality of first arrays and a plurality of second arrays. Each first array comprises at least two first strip structures, each first strip structure having a long side and a short side smaller than the long side, the first strip structures being arranged parallel to each other, and the first strip structures gradually decreasing in size away from the body. Each second array comprises at least two second strip structures, each second strip structure having a long side and a short side smaller than the long side, the second strip structures being arranged parallel to each other, and the second strip structures gradually decreasing in size away from the body. The first arrays and second arrays are arranged alternately, and in one of the adjacent first arrays and one of the adjacent second arrays, the short side of each first strip structure faces the long side of one of the second strip structures.

[0008] This invention provides an electronic device comprising the aforementioned imaging lens.

[0009] According to the imaging lens and electronic device disclosed in this invention, by arranging the first array and the second array alternately, the microstructure surface can absorb reflected light from different directions, which helps to reduce stray light reflection. Furthermore, by gradually reducing the size of the strip structure away from the body, the anti-reflective capability of the microstructure surface is improved.

[0010] The above description of the present utility model and the following description of the embodiments are used to demonstrate and explain the principle of the present utility model, and to provide a further explanation of the scope of the patent application of the present utility model. Attached Figure Description

[0011] Figure 1 A cross-sectional schematic diagram of an imaging lens according to the first embodiment of the present invention is shown.

[0012] Figure 2 Draw Figure 1 A three-dimensional schematic diagram of the image side of the ring-shaped light-blocking element of the imaging lens, and a magnified schematic diagram of two parts of the ring-shaped light-blocking element.

[0013] Figure 3 Draw Figure 2 An enlarged schematic diagram of a first array and a second array arranged adjacent to each other on the surface of a microstructure.

[0014] Figure 4 Draw Figure 1 A three-dimensional schematic diagram of the object side of the ring-shaped light-blocking element of the imaging lens.

[0015] Figure 5 Draw Figure 1A partial cross-sectional schematic diagram of the ring-shaped light-blocking element of the imaging lens.

[0016] Figure 6 Draw Figure 5 A magnified view of region A6 and a partial magnified view of region A6.

[0017] Figure 7 Draw Figure 5 An enlarged view of region A7 and a partial enlarged view of region A7.

[0018] Figure 8 A cross-sectional schematic diagram of an imaging lens according to a second embodiment of the present invention is shown.

[0019] Figure 9 Draw Figure 8 A three-dimensional schematic diagram of the first annular light-shielding element of the imaging lens from the object side, and a partially enlarged schematic diagram of one part of the first annular light-shielding element.

[0020] Figure 10 Draw Figure 8 A partial cross-sectional schematic diagram of the first annular light-shielding element of the imaging lens and a partial enlarged schematic diagram of one part of the first annular light-shielding element.

[0021] Figure 11 Draw Figure 10 An enlarged schematic diagram of region A11.

[0022] Figure 12 Draw Figure 8 A three-dimensional schematic diagram of the image side of the second annular light-blocking element of the imaging lens and a partially enlarged schematic diagram of one part of the second annular light-blocking element.

[0023] Figure 13 Draw Figure 8 A partial cross-sectional schematic diagram of the second annular light-shielding element of the imaging lens and a partial enlarged schematic diagram of one part of the second annular light-shielding element.

[0024] Figure 14 Draw Figure 13 An enlarged schematic diagram of region A14.

[0025] Figure 15 A cross-sectional schematic diagram of an imaging lens according to a third embodiment of the present invention is shown.

[0026] Figure 16 Draw Figure 15 A three-dimensional schematic diagram of the object side of the ring-shaped light-blocking element of the imaging lens, and a partially enlarged schematic diagram of one part of the ring-shaped light-blocking element.

[0027] Figure 17 Draw Figure 15A partial cross-sectional schematic diagram of the ring-shaped light-blocking element of the imaging lens and a partial enlarged schematic diagram of one part of the ring-shaped light-blocking element.

[0028] Figure 18 Draw Figure 17 An enlarged schematic diagram of region A18.

[0029] Figure 19 A cross-sectional schematic diagram of an imaging lens according to the fourth embodiment of the present invention is shown.

[0030] Figure 20 Draw Figure 19 A stereoscopic view of the image side of the ring-shaped light-blocking element of the imaging lens, and a magnified view of two parts of the ring-shaped light-blocking element.

[0031] Figure 21 Draw Figure 19 A partial cross-sectional schematic diagram of the ring-shaped light-blocking element of the imaging lens and a partial enlarged schematic diagram of one part of the ring-shaped light-blocking element.

[0032] Figure 22 Draw Figure 21 An enlarged schematic diagram of region A22.

[0033] Figure 23 A cross-sectional schematic diagram of an imaging lens according to the fifth embodiment of the present invention is shown.

[0034] Figure 24 Draw Figure 23 A three-dimensional exploded diagram of the light-shielding element and the optical path deflection element of the imaging lens, and a magnified partial diagram of one part of the light-shielding element.

[0035] Figure 25 Draw Figure 23 A side view of the light-shielding element and the optical path deflection element of the imaging lens, and a partial enlarged view of one of them.

[0036] Figure 26 Draw Figure 25 An enlarged schematic diagram of region A26 and a partial enlarged schematic diagram of region A26.

[0037] Figure 27 A cross-sectional schematic diagram is shown, illustrating another embodiment of the light-shielding element in the imaging lens according to the fifth embodiment of the present invention.

[0038] Figure 28 A perspective view of one side of an electronic device according to the sixth embodiment of the present invention is shown.

[0039] Figure 29 Draw Figure 28 A three-dimensional diagram of the other side of the electronic device.

[0040] Figure 30 A schematic diagram illustrating the image captured by an ultra-wide-angle imaging lens.

[0041] Figure 31 A schematic diagram illustrating the image captured by a high-resolution imaging lens.

[0042] Figure 32 A schematic diagram illustrating the image captured by a telephoto lens.

[0043] Figure 33 A perspective view of one side of an electronic device according to the seventh embodiment of the present invention is shown.

[0044] Figure 34 A perspective view of an electronic device according to the eighth embodiment of the present invention is shown.

[0045] Figure 35 Draw Figure 34 A side view of the electronic device.

[0046] Figure 36 Draw Figure 34 A top-view diagram of the electronic device.

[0047] [Symbol Explanation]

[0048] 1,2,3,4,5,5a,600a,600b,600c,700a,700b,700c,700d,700e,700f,700g,700h,700i,800a: Imaging Lens

[0049] 10,20,25,30,40,50,50a: Light-shielding elements

[0050] 11,21,31,41: Lens tube elements

[0051] 12,22,32,42,52: Lens elements

[0052] 13,33,43,53: Spacer rings

[0053] 14,24,34,44,54: Light-blocking sheet

[0054] 26, 36, 46, 56: Fixing rings

[0055] 57, 57a: Outer shell

[0056] 58, 58a: Optical path switching element

[0057] 59, 59a: Viscous elements

[0058] 100,200,250,300,400,500: Ontology

[0059] 101, 102, 201, 251, 301, 401, 501: Microstructured surfaces

[0060] 103, 203, 253, 303, 403: Openings

[0061] 4031: Straight edge

[0062] 4032: Curved edge

[0063] B1, B3, B5, B7, B9, B13: First array

[0064] B2, B4, B6, B8, B10, B14: Second array

[0065] B11, B31, B51, B71, B91, B131: First strip-like structure

[0066] B21, B41, B61, B81, B101, B141: Second strip-like structure

[0067] B1L, B3L, B5L, B7L, B9L, B13L, B2L, B4L, B6L, B8L, B10L, B14L: Long side

[0068] B1S, B3S, B5S, B7S, B9S, B13S, B2S, B4S, B6S, B8S, B10S, B14S: short side

[0069] DR1: Zhou Xiang

[0070] DR2: Radial

[0071] θ1, θ2: included angle

[0072] SF1, SF3, SF5, SF7: Plane

[0073] SF2, SF4, SF6: Inclined surface

[0074] S7: Straight Section

[0075] DF1: First direction

[0076] DF2: Second direction

[0077] H1: Vertical height of the first strip structure on the body

[0078] D1: Length of the shorter side of the first strip structure

[0079] Tg1: The gap between any two adjacent structures in the first strip-shaped structure

[0080] L1: Length of the long side of each second strip structure

[0081] R1: Radius of curvature of the fillet

[0082] TA: Thickness of viscous element

[0083] IS: Electronic photosensitive element

[0084] IMG: Imaging Surface

[0085] FT: Filter element

[0086] RF1: Coated reflective surface

[0087] RF2, RF2a: Optical surfaces

[0088] RF3: Second coated reflective surface

[0089] PA: Imaging optical path

[0090] CA: Central Axis

[0091] 600, 700, 800: Electronic devices

[0092] 601, 701: Flash module

[0093] 602: Focusing Assist Module

[0094] 603: Image Signal Processor

[0095] 604: Display Module Detailed Implementation

[0096] The following detailed description of the features and advantages of this utility model in the embodiments is sufficient to enable any person skilled in the art to understand the technical content of this utility model and implement it accordingly. Based on the disclosure of this specification, the scope of the claims, and the accompanying drawings, any person skilled in the art can easily understand the related objectives and advantages of this utility model. The following embodiments further illustrate the viewpoints of this utility model in detail, but are not intended to limit the scope of this utility model in any way.

[0097] This invention provides an imaging lens comprising at least one lens element and a light-shielding element. The imaging optical path passes through the lens element. The light-shielding element comprises a body and at least one microstructure surface. The microstructure surface is disposed on the body and comprises a plurality of first arrays and a plurality of second arrays. Each first array comprises at least two first strip structures, each first strip structure having a long side and a short side smaller than the long side, and the first strip structures gradually taper away from the body. Each second array comprises at least two second strip structures, each second strip structure having a long side and a short side smaller than the long side, and the second strip structures gradually taper away from the body. The first arrays and second arrays are arranged alternately, and in one of the adjacent first arrays and one of the adjacent second arrays, the short side of each first strip structure faces the long side of one of the second strip structures.

[0098] According to the imaging lens disclosed in this invention, by arranging the first array and the second array alternately, the microstructure surface can absorb reflected light from different directions, which helps to reduce stray light reflection. Furthermore, by gradually reducing the size of the strip structure away from the body, the anti-reflective capability of the microstructure surface is improved.

[0099] The microstructure surface of the light-shielding element can be integrally molded with the body. This facilitates mass production.

[0100] In some embodiments, ink can be further applied to the surface of the microstructure to enhance the anti-reflective effect of the light-shielding element.

[0101] The microstructured surface can be achieved, for example, using nanoimprint lithography, ultraviolet curing, injection molding, or thermoforming, but this invention is not limited thereto.

[0102] The first strip structure can be a convex structure, and the second strip structure can also be a convex structure. Please refer to... Figure 2 , Figure 3 and Figure 6 It illustrates a schematic diagram of a first strip structure and a second strip structure according to the first embodiment of the present invention. Figure 2 , Figure 3 and Figure 6 In the embodiments described, the first and second strip structures are convex structures, but the present invention is not limited thereto. In some embodiments, the first and / or second strip structures may also be recessed structures, and the cross-sectional shape of the recessed structure may be, for example, the same as or similar to the cross-sectional shape of the convex structure, thus achieving a good anti-reflective effect.

[0103] The cross-sectional shape of each of the first strip structures on its short side can be a triangle, an arc, a semicircle, a trapezoid, or a combination thereof, and the cross-sectional shape of each of the second strip structures on its short side can also be a triangle, an arc, a semicircle, a trapezoid, or a combination thereof, but this utility model is not limited thereto.

[0104] The number of first strip structures in each first array and the number of second strip structures in each second array can be the same. For example, the number of first strip structures and the number of second strip structures can both be two, three, or four, but this invention is not limited thereto. In some embodiments, the number of first strip structures in each first array and the number of second strip structures in each second array can also be different. For example, in one embodiment, the number of first strip structures in each first array is two, and the number of second strip structures in each second array is three. As another example, in another embodiment, the number of first strip structures in each first array is four, and the number of second strip structures in each second array is three. It should be noted that this invention is not limited to the aforementioned number of strip structures.

[0105] The first strip structures in each first array can be arranged parallel to each other, and the second strip structures in each second array can be arranged parallel to each other. The first and second arrays can be arranged at equal intervals. The first and second arrays can also be arranged orthogonally. In other words, the extension direction of the first strip structure can be different from the extension direction of the second strip structure. Further, the extension direction of the first strip structure is orthogonal to the extension direction of the second strip structure. However, this invention is not limited to the aforementioned arrangement.

[0106] In some embodiments, the light-shielding element may be an annular light-shielding element, and the body of the annular light-shielding element may have an opening. The lens element has a central axis, and the central axis of the lens element passes through the opening in the body. The microstructure surface may be disposed on the body surrounding the opening.

[0107] The first strip structure can extend circumferentially along the annular light-shielding element, and the second strip structure can extend radially along the annular light-shielding element.

[0108] In some embodiments, the light-shielding element may include multiple microstructured surfaces, and these microstructured surfaces may be respectively disposed on the object side and image side of the body, but the present invention is not limited thereto.

[0109] The angle between the microstructure surface and the central axis can be between 45 degrees and 135 degrees. The microstructure surface can be an inclined plane. It should be noted that when the angle between the microstructure surface and the central axis is less than 45 degrees, or between 135 degrees and 180 degrees, designs with microstructures extending in different directions should be avoided, as this may lead to difficulties in mold separation after molding. Preferably, the angle between the microstructure surface and the central axis can be between 70 degrees and 110 degrees.

[0110] Each of the first strip-shaped structures can gradually shrink in a direction parallel to the central axis. In this way, the strip-shaped structures on the inclined plane do not gradually shrink in a direction perpendicular to the inclined plane, but in a direction parallel to the central axis, which helps to reduce the difficulty of mold processing.

[0111] The cross-sectional shape of each of the first strip structures on its short side can be the same as the cross-sectional shape of each of the second strip structures on its short side. This allows the first array and the second array to have the same shape, simplifying the mold processing. However, this invention is not limited thereto. For example, in some embodiments, the cross-sectional shape of each of the first strip structures on its short side can be different from the cross-sectional shape of each of the second strip structures on its short side.

[0112] The annular light-shielding element can be a lens barrel element used to house the lens element. This allows the outermost surface of the lens to appear darker, meeting aesthetic requirements. The microstructured surface can be located on the surface of the lens barrel element near the object side or image side.

[0113] An anti-reflective film may be deposited on the surface of the microstructure. The anti-reflective film may be an optical multilayer film with alternating high and low refractive indices at least three times, a nanocrystalline film forming a moth-eye structure, or a film with multiple nanopores, but this invention is not limited to these.

[0114] The vertical height of the first strip structure on the body is H1, which satisfies the following condition: 1 μm ≤ H1 ≤ 50 μm (micrometers). Therefore, an appropriate strip structure height allows stray light to undergo multiple reflections within the strip structure, effectively suppressing stray light. It can also satisfy the following condition: 10 μm ≤ H1 ≤ 25 μm. Please refer to... Figure 6 It illustrates a schematic diagram of parameter H1 according to the first embodiment of the present invention.

[0115] The vertical height of the first strip structure on the body is H1, and the length of the short side of each first strip structure is D1, which satisfies the following condition: 0.3 ≤ H1 / D1 ≤ 1.2. Therefore, an appropriate aspect ratio of the strip structure can reduce the difficulty of mold processing and improve mass production efficiency. Please refer to... Figure 6 It illustrates a schematic diagram of parameters H1 and D1 according to the first embodiment of the present invention.

[0116] The length of the short side of each first strip structure is D1, and the gap between any two adjacent first strip structures is Tg1, which satisfies the following condition: 2 ≤ D1 / Tg1 ≤ 20. Therefore, appropriate gaps between the strip structures can reduce the difficulty of mold processing and improve mass production efficiency. Please refer to... Figure 6 It illustrates a schematic diagram of parameters D1 and Tg1 according to the first embodiment of the present invention.

[0117] The number of first strip structures in each first array is X1, which satisfies the following condition: 2 ≤ X1 ≤ 5. It should be noted that if the number of strip structures is too large and densely arranged within the same array area, it will lead to difficulties in molding and increase mold costs. In some embodiments, the number of first strip structures in a single first array and the number of second strip structures in a single second array may be different. In some embodiments, the number of first strip structures in a single first array and the number of second strip structures in a single second array may be the same. In some embodiments, the number of strip structures in different arrays may differ; for example, the number of strip structures in the array closer to the opening may be less than the number of strip structures in the array farther away from the opening.

[0118] The length of the short side of each first strip structure is D1, the gap between any two adjacent first strip structures is Tg1, the number of first strip structures in each first array is X1, and the length of the long side of each second strip structure is L1, which satisfies the following condition: 0.8×L1 ≤ X1×(D1+Tg1) ≤ 1.2×L1. This allows the first and second arrays to each have approximately square shapes, which helps reduce stray light reflection. Please refer to... Figure 6 It illustrates a schematic diagram of parameters D1, Tg1, and L1 according to the first embodiment of the present invention.

[0119] The tips of each first strip structure are rounded, with a radius of curvature of R1, satisfying the following condition: 2 μm ≤ R1 ≤ 20 μm. Therefore, since a sharper tip makes the mold more difficult to process, rounding the tips of the strip structures appropriately reduces the difficulty of mold processing. Please refer to... Figure 7 It illustrates a schematic diagram of parameter R1 according to the first embodiment of the present invention.

[0120] The above description of some features uses the first array and its first strip structure as examples only. However, it should be noted that the second array and its second strip structure may also have the same or similar structural features as the first array and its first strip structure, but this utility model is not limited thereto.

[0121] The imaging lens may further include an optical path reversing element, which is used to revers the imaging optical path. The optical path reversing element includes an optical surface, and the imaging light from the imaging lens can undergo at least one total internal reflection at the optical surface. A light-shielding element may be disposed relative to the optical surface. Therefore, since the optical surface used for total internal reflection in the optical path reversing element is prone to generating stray light, distributing the light-shielding element corresponding to the optical surface helps to eliminate stray light generated by the optical surface.

[0122] The imaging lens may further include an adhesive element for fixing a light-shielding element. The thickness of the adhesive element is TA, which satisfies the following condition: 10 μm ≤ TA ≤ 50 μm. This allows the adhesive element to fix the light-shielding element to an optical surface or to the housing of the imaging lens corresponding to that optical surface. Please refer to... Figure 25 It illustrates a schematic diagram of parameters TA according to the fifth embodiment of the present invention.

[0123] This invention provides an electronic device comprising the aforementioned imaging lens.

[0124] The various technical features disclosed in the imaging lens of this utility model can be combined and configured to achieve the corresponding effects.

[0125] Based on the above embodiments, specific examples are described below in detail with reference to the accompanying drawings. It should be noted that the specific surface shapes of some lens elements are omitted in the accompanying drawings, and the lens elements in each embodiment of this utility model are not limited to the outlines shown in the drawings.

[0126] <First Embodiment>

[0127] Please refer to Figures 1 to 7 ,in Figure 1 A cross-sectional schematic diagram of an imaging lens according to the first embodiment of the present invention is shown. Figure 2 Draw Figure 1 A three-dimensional schematic diagram of the image side of the ring-shaped light-blocking element of the imaging lens, and enlarged partial schematic diagrams of two parts of the ring-shaped light-blocking element. Figure 3 Draw Figure 2 An enlarged schematic diagram of a first array and a second array arranged adjacent to each other on the surface of a microstructure. Figure 4 Draw Figure 1 A three-dimensional schematic diagram of the object side of the ring-shaped light-shielding element of the imaging lens. Figure 5 Draw Figure 1 A partial cross-sectional schematic diagram of the ring-shaped light-shielding element of the imaging lens. Figure 6 Draw Figure 5 An enlarged view of region A6 and a partial enlarged view of region A6, and Figure 7 Draw Figure 5 An enlarged view of region A7 and a partial enlarged view of region A7.

[0128] The imaging lens 1 of this embodiment includes a lens barrel element 11, a plurality of lens elements 12, a spacer ring 13, a plurality of light-shielding plates 14, and a light-shielding element 10. In this embodiment, the light-shielding element 10 is an annular light-shielding element and is a fixed ring. In the following description of this embodiment, the annular light-shielding element refers to the light-shielding element 10.

[0129] These lens elements 12 have a central axis CA and are disposed within the lens barrel element 11. Spacer rings 13 are disposed between adjacent lens elements 12 to maintain the lens spacing and position the lens elements 12 within the lens barrel element 11. Light-shielding plates 14 are disposed between the lens elements 12 or between the lens elements 12 and the spacer rings 13 to block stray light. Retaining rings (light-shielding elements 10) fix these lens elements 12 within the lens barrel element 11. In this embodiment, the retaining rings (light-shielding elements 10) function as light-shielding elements 10 of the imaging lens 1.

[0130] The annular light-shielding element 10 includes a body 100, an image-side microstructure surface 101, and an object-side microstructure surface 102. The body 100 has an opening 103, and the central axis CA of the lens element 12 passes through the opening 103.

[0131] In detail, such as Figure 2 and Figure 4 As shown, an image-side microstructure surface 101 is disposed around the opening 103 on the image-side surface of the body 100, and an object-side microstructure surface 102 is disposed around the opening 103 on the object-side surface of the body 100. Furthermore, the image-side microstructure surface 101 can be integrally formed with the body 100, and the object-side microstructure surface 102 can also be integrally formed with the body 100.

[0132] like Figure 2 As shown, the image-side microstructure surface 101 includes a plurality of first arrays B1 and a plurality of second arrays B2. Each first array B1 includes three first strip structures B11, and each first strip structure B11 has a long side B1L and a short side B1S smaller than the long side B1L. Each second array B2 includes three second strip structures B21, and each second strip structure B21 has a long side B2L and a short side B2S smaller than the long side B2L.

[0133] Please refer to the above as well. Figure 3The first array B1 and the second array B2 of the microstructure surface 101 are arranged alternately, and in one of the adjacent first arrays B1 and one of the second arrays B2, the short side B1S of each of the first strip structures B11 is oriented toward the long side B2L of one of the second strip structures B21. In this embodiment, the first strip structure B11 extends along the circumferential direction DR1 of the annular light-shielding element 10, and the second strip structure B21 extends along the radial direction DR2 of the annular light-shielding element 10. The first strip structure B11 has an arc and is slightly curved in the direction of its long side B1L. That is, the long side B1L of the first strip structure B11 extends along the circumferential direction DR1 of the annular light-shielding element 10, thus having an arc and being slightly curved.

[0134] like Figure 5 As shown, at least a portion of the image-side microstructure surface 101 is a plane SF1 and at least a portion is an inclined plane SF2. The angle θ1 between the plane SF1 of the image-side microstructure surface 101 and the central axis CA is 90 degrees, and the angle θ2 between the inclined plane SF2 of the image-side microstructure surface 101 and the central axis CA is 110 degrees. Figure 6 An enlarged schematic diagram of plane SF1 showing the image-side microstructure surface 101 is drawn, and Figure 7 An enlarged schematic diagram of the inclined surface SF2 of the image-side microstructure surface 101 is shown. It should be noted that... Figure 5 The distribution range of each microstructure surface 101 and 102 is indicated by dashed lines. These dashed lines are for illustrative purposes only, and the actual shape or component connection relationship of each microstructure surface 101 and 102 is not necessarily indicative of the actual distribution range. Figure 5 The outline shown by the dotted line in the text is the limit.

[0135] like Figure 6 As shown, on the plane SF1 of the image-side microstructure surface 101, the first strip structure B11 gradually shrinks away from the body 100, and the second strip structure B21 also gradually shrinks away from the body 100. Specifically, both the first strip structure B11 and the second strip structure B21 gradually shrink away from the body 100 along a direction parallel to the central axis CA. Furthermore, the cross-sectional shape of each of the first strip structures B11 on its short side B1S is the same as the cross-sectional shape of each of the second strip structures B21 on its short side B2S. In this embodiment, on the plane SF1 of the image-side microstructure surface 101, the cross-sectional shape of each of the first strip structures B11 on its short side B1S is semi-circular, and the cross-sectional shape of each of the second strip structures B21 on its short side B2S is also semi-circular.

[0136] At plane SF1 on the image-side microstructure surface 101, the vertical height of the first strip structure B11 on the body 100 is H1, which satisfies the following condition: H1 = 20 μm.

[0137] On the plane SF1 of the image-side microstructure surface 101, the vertical height of the first strip structure B11 on the body 100 is H1, and the length of the short side B1S of each first strip structure B11 is D1, which satisfies the following conditions: D1 = 40 μm and H1 / D1 = 0.5.

[0138] On the plane SF1 of the image-side microstructure surface 101, the length of the short side B1S of each first strip structure B11 is D1, and the gap between any two adjacent first strip structures B11 is Tg1, which satisfies the following conditions: Tg1 = 10 μm and D1 / Tg1 = 4.

[0139] like Figure 2 and Figure 3 As shown, on the plane SF1 of the image-side microstructure surface 101, the number of first strip structures B11 in each first array B1 is X1, which satisfies the following condition: X1 = 3.

[0140] On plane SF1 of the image-side microstructure surface 101, the length of the short side B1S of each first strip structure B11 is D1, the gap between any two adjacent first strip structures B11 is Tg1, the number of first strip structures B11 in each first array B1 is X1, and the length of the long side B2L of each second strip structure B21 is L1, which satisfies the following conditions: L1 = 150 μm and X1×(D1+Tg1) = 150 μm. Wherein, 0.8×L1 = 120 μm, 1.2×L1 = 180 μm, and 0.8×L1 ≤ X1×(D1+Tg1) = 1.0×L1 ≤ 1.2×L1.

[0141] like Figure 7 As shown, on the inclined surface SF2 of the image-side microstructure surface 101, the first strip structure B11 gradually tapers away from the body 100, and the second strip structure B21 also gradually tapers away from the body 100. Specifically, both the first strip structure B11 and the second strip structure B21 taper away from the body 100 along a direction parallel to the central axis CA. Furthermore, the cross-sectional shape of each of the first strip structures B11 on its short side B1S is the same as the cross-sectional shape of each of the second strip structures B21 on its short side B2S. In this embodiment, the cross-sectional shape of each of the first strip structures B11 on its short side B1S is approximately triangular, and the cross-sectional shape of each of the second strip structures B21 on its short side B2S is also approximately triangular.

[0142] On the inclined surface SF2 of the image-side microstructure surface 101, the vertical height of the first strip structure B11 on the body 100 is H1, which satisfies the following condition: H1 = 16 μm.

[0143] On the inclined surface SF2 of the image-side microstructure surface 101, the vertical height of the first strip structure B11 on the body 100 is H1, and the length of the short side B1S of each first strip structure B11 is D1, which satisfies the following conditions: D1 = 32 μm and H1 / D1 = 0.5.

[0144] On the inclined surface SF2 of the image-side microstructure surface 101, the length of the short side B1S of each first strip structure B11 is D1, and the gap between any two adjacent first strip structures B11 is Tg1, which satisfies the following conditions: Tg1 = 8 μm and D1 / Tg1 = 4.

[0145] On the inclined surface SF2 of the image-side microstructure surface 101, the number of first strip structures B11 in each first array B1 is X1, which satisfies the following condition: X1 = 3.

[0146] On the inclined surface SF2 of the image-side microstructure surface 101, the length of the short side B1S of each first strip structure B11 is D1, the gap between any two adjacent first strip structures B11 is Tg1, the number of first strip structures B11 in each first array B1 is X1, and the length of the long side B2L of each second strip structure B21 is L1, which satisfies the following conditions: L1 = 125 μm and X1×(D1+Tg1) = 120 μm. Wherein, 0.8×L1 = 100 μm, 1.2×L1 = 150 μm, and 0.8×L1 ≤ X1×(D1+Tg1) ≤ 1.2×L1.

[0147] On the inclined surface SF2 of the image-side microstructure surface 101, the top of each first strip structure B11 is rounded, and the radius of curvature of the rounded corner is R1, which satisfies the following condition: R1 = 4 μm.

[0148] The above description mainly focuses on the first array B1 and its first strip structure B11 of the image-side microstructure surface 101. However, the second array B2 and its second strip structure B21 of the image-side microstructure surface 101 also have the same or similar structural features as the first array B1 and its first strip structure B11.

[0149] like Figure 5 As shown, the object-side microstructure surface 102 is at least partially planar (SF3) and at least partially inclined (SF4). The object-side microstructure surface 102 may have the same or similar structural features as the image-side microstructure surface 101, which will not be elaborated here.

[0150] <Second Embodiment>

[0151] Please refer to Figures 8 to 14 ,in Figure 8 A cross-sectional schematic diagram of an imaging lens according to a second embodiment of the present invention is shown. Figure 9 Draw Figure 8 A three-dimensional schematic diagram of the first annular light-shielding element of the imaging lens from the object side, and a partially enlarged schematic diagram of one part of the first annular light-shielding element. Figure 10 Draw Figure 8 A partial cross-sectional schematic diagram of the first annular light-shielding element of the imaging lens and a partially enlarged schematic diagram of one part of the first annular light-shielding element. Figure 11 Draw Figure 10 An enlarged schematic diagram of region A11. Figure 12 Draw Figure 8 A three-dimensional schematic diagram of the image side of the second annular light-shielding element of the imaging lens, and a partially enlarged schematic diagram of one part of the second annular light-shielding element. Figure 13 Draw Figure 8 A partial cross-sectional schematic diagram of the second annular light-shielding element of the imaging lens and a partially enlarged schematic diagram of one part of the second annular light-shielding element, and Figure 14 Draw Figure 13 An enlarged schematic diagram of region A14.

[0152] The imaging lens 2 of this embodiment includes a lens barrel element 21, a plurality of lens elements 22, a first light-shielding element 20, a plurality of light-shielding plates 24, a second light-shielding element 25, and a fixing ring 26. In this embodiment, the first light-shielding element 20 is an annular light-shielding element and a light-shielding plate, and the second light-shielding element 25 is an annular light-shielding element and a spacer ring. In the following description of this embodiment, the first annular light-shielding element refers to the first light-shielding element 20, and the second annular light-shielding element refers to the second light-shielding element 25.

[0153] These lens elements 22 have a central axis CA and are disposed within the lens barrel element 21. Spacer rings (second annular light-shielding elements 25) are disposed between adjacent lens elements 22 to maintain the lens spacing and position the lens elements 22 within the lens barrel element 21. Light-shielding plates 24 and first annular light-shielding elements 20, which are also light-shielding plates, are respectively disposed between the lens elements 22 to block stray light. Fixing rings 26 fix these lens elements 22 within the lens barrel element 21. In this embodiment, the spacer rings (second annular light-shielding elements 25) serve as the second annular light-shielding elements 25 of the imaging lens 2, providing light-shielding functionality.

[0154] like Figure 9 and Figure 10As shown, the first annular light-shielding element 20 includes a body 200 and two microstructure surfaces 201. The body 200 has an opening 203, and the central axis CA of the lens element 22 passes through the opening 203. In this embodiment, the periphery of the opening 203 of the body 200 of the first annular light-shielding element 20 is wavy.

[0155] The two microstructure surfaces 201 of the first annular light-shielding element 20 are respectively disposed on the object side and image side of the body 200 surrounding the opening 203. In addition, the two microstructure surfaces 201 can be integrally formed with the body 200, and the two microstructure surfaces 201 can have the same structural features as each other.

[0156] like Figure 9 As shown, each microstructure surface 201 includes multiple first arrays B3 and multiple second arrays B4. Each first array B3 includes four first strip structures B31, and each first strip structure B31 has a long side B3L and a short side B3S smaller than the long side B3L. Each second array B4 includes four second strip structures B41, and each second strip structure B41 has a long side B4L and a short side B4S smaller than the long side B4L.

[0157] The first array B3 and the second array B4 of each microstructure surface 201 are arranged alternately, and in one of the adjacent first arrays B3 and one of the second arrays B4, the short side B3S of each of the first strip structures B31 is oriented toward the long side B4L of one of the second strip structures B41. In this embodiment, the first strip structure B31 extends along the circumferential direction DR1 of the first annular light-shielding element 20, and the second strip structure B41 extends along the radial direction DR2 of the first annular light-shielding element 20. The first strip structure B31 has an arc and is slightly curved in the direction of its long side B3L.

[0158] like Figure 10 As shown, these microstructure surfaces 201 are planar, and the angle θ1 between the microstructure surface 201 and the central axis CA is 90 degrees. It should be noted that... Figure 10 The distribution range of each microstructure surface 201 is represented by dashed lines. These dashed lines are for illustrative purposes only, and the actual shape of each microstructure surface 201 or the connection relationship of its components is not necessarily indicative of the actual distribution range. Figure 10 The outline shown by the dotted line in the text is the limit.

[0159] like Figures 9 to 11As shown, the first strip structure B31 gradually tapers away from the body 200, and the second strip structure B41 also gradually tapers away from the body 200. Specifically, both the first strip structure B31 and the second strip structure B41 taper away from the body 200 along a direction parallel to the central axis CA. Furthermore, the cross-sectional shape of each of the first strip structures B31 on its short side B3S is the same as the cross-sectional shape of each of the second strip structures B41 on its short side B4S. In this embodiment, the cross-sectional shape of each of the first strip structures B31 on its short side B3S is triangular, and the cross-sectional shape of each of the second strip structures B41 on its short side B4S is also triangular. Additionally, the apex of each of the first strip structures B31 and each of the second strip structures B41 is an obtuse angle.

[0160] In the first annular light-shielding element 20, the vertical height of the first strip structure B31 on the body 200 is H1, which satisfies the following condition: H1 = 10 μm.

[0161] In the first annular light-shielding element 20, the vertical height of the first strip structure B31 on the body 200 is H1, and the length of the short side B3S of each first strip structure B31 is D1, which satisfies the following conditions: D1 = 25 μm and H1 / D1 = 0.4.

[0162] In the first annular light-shielding element 20, the length of the short side B3S of each first strip structure B31 is D1, and the gap between any two adjacent first strip structures B31 is Tg1, which satisfies the following conditions: Tg1 = 3 μm and D1 / Tg1 = 8.33.

[0163] In the first annular light-shielding element 20, the number of first strip structures B31 in each first array B3 is X1, which satisfies the following condition: X1 = 4.

[0164] In the first annular light-shielding element 20, the length of the short side B3S of each first strip structure B31 is D1, the gap between any two adjacent first strip structures B31 is Tg1, the number of first strip structures B31 in each first array B3 is X1, and the length of the long side B4L of each second strip structure B41 is L1, which satisfies the following conditions: L1 = 110 μm and X1×(D1+Tg1) = 112 μm. Wherein, 0.8×L1 = 88 μm, 1.2×L1 = 132 μm, and 0.8×L1 ≤ X1×(D1+Tg1) ≤ 1.2×L1.

[0165] The above description mainly focuses on the first array B3 and its first strip structure B31. However, the second array B4 and its second strip structure B41 also have the same or similar structural features as the first array B3 and its first strip structure B31.

[0166] like Figure 12 and Figure 13 As shown, the second annular light-shielding element 25 includes a body 250 and two microstructure surfaces 251. The body 250 has an opening 253, and the central axis CA of the lens element 22 passes through the opening 253.

[0167] The two microstructure surfaces 251 of the second annular light-shielding element 25 are respectively disposed on the object side and image side of the body 250 around the opening 253. In addition, the two microstructure surfaces 251 can be integrally formed with the body 250.

[0168] like Figure 13 As shown, in the second annular light-shielding element 25, the microstructure surface 251 disposed on the object-side side of the body 250 is a plane SF5, while the microstructure surface 251 disposed on the image-side side of the body 250 is at least partially a plane SF7 and at least partially an inclined plane SF6. The angle θ1 between the planes SF5 and SF7 of the microstructure surface 251 and the central axis CA is 90 degrees, and the angle θ2 between the inclined plane SF6 of the microstructure surface 251 and the central axis CA is 79.67 degrees. Figure 13 An enlarged schematic diagram of the inclined surface SF6 with microstructure surface 251 is shown. It should be noted that... Figure 13 The distribution range of each microstructure surface 251 is represented by dashed lines. These dashed lines are for illustrative purposes only, and the actual shape of each microstructure surface 251 or the connection relationship of its components is not necessarily indicative of its actual shape. Figure 13 The outline shown by the dashed line is the limit. The structural features of the planes SF5 and SF7 of the two microstructure surfaces 251 of the second annular light-shielding element 25 may be the same as or similar to the structural features of the microstructure surface 251 of the first annular light-shielding element 20. Therefore, the following only describes the structural features on the inclined surface SF6 of the microstructure surface 251 of the second annular light-shielding element 25.

[0169] like Figure 12 As shown, on the inclined surface SF6 of the microstructure surface 251, each microstructure surface 251 includes a plurality of first arrays B5 and a plurality of second arrays B6. Each first array B5 includes four first strip structures B51, and each first strip structure B51 has a long side B5L and a short side B5S smaller than the long side B5L. Each second array B6 includes four second strip structures B61, and each second strip structure B61 has a long side B6L and a short side B6S smaller than the long side B6L.

[0170] The first array B5 and the second array B6 of each microstructure surface 251 are arranged alternately, and in one of the adjacent first arrays B5 and one of the second arrays B6, the short side B5S of each of the first strip structures B51 is oriented toward the long side B6L of one of the second strip structures B61. In this embodiment, the first strip structure B51 extends along the circumferential DR1 of the second annular light-shielding element 25, and the second strip structure B61 extends along the radial DR2 of the second annular light-shielding element 25. The first strip structure B51 has an arc and is slightly curved in the direction of its long side B5L.

[0171] like Figures 12 to 14 As shown, on the inclined surface SF6 of the microstructure surface 251, the first strip structure B51 gradually tapers away from the body 250, and the second strip structure B61 also gradually tapers away from the body 250. Specifically, both the first strip structure B51 and the second strip structure B61 taper away from the body 250 along a direction parallel to the central axis CA. Furthermore, the cross-sectional shape of each of the first strip structures B51 on its short side B5S is the same as the cross-sectional shape of each of the second strip structures B61 on its short side B6S. In this embodiment, the cross-sectional shape of each of the first strip structures B51 on its short side B5S is triangular, and the cross-sectional shape of each of the second strip structures B61 on its short side B6S is also triangular. Additionally, the apex of each of the first strip structures B51 and each of the second strip structures B61 is a right angle.

[0172] At the inclined surface SF6 of the microstructure surface 251 in the second annular light-shielding element 25, the vertical height of the first strip structure B51 on the body 250 is H1, which satisfies the following condition: H1 = 14 μm.

[0173] At the inclined surface SF6 of the microstructure surface 251 in the second annular light-shielding element 25, the vertical height of the first strip structure B51 on the body 250 is H1, and the length of the short side B5S of each first strip structure B51 is D1, which satisfies the following conditions: D1 = 30 μm and H1 / D1 = 0.47.

[0174] On the inclined surface SF6 of the microstructure surface 251 in the second annular light-shielding element 25, the length of the short side B5S of each first strip structure B51 is D1, and the gap between any two adjacent first strip structures B51 is Tg1, which satisfies the following conditions: Tg1 = 8 μm and D1 / Tg1 = 3.75.

[0175] On the inclined surface SF6 of the microstructure surface 251 in the second annular light-shielding element 25, the number of the first strip structure B51 in each first array B5 is X1, which satisfies the following condition: X1 = 4.

[0176] On the inclined surface SF6 of the microstructure surface 251 in the second annular light-shielding element 25, the length of the short side B5S of each first strip structure B51 is D1, the gap between any two adjacent first strip structures B51 is Tg1, the number of first strip structures B51 in each first array B5 is X1, and the length of the long side B6L of each second strip structure B61 is L1, which satisfies the following conditions: L1 = 150 μm and X1×(D1+Tg1) = 152 μm. Wherein, 0.8×L1 = 121.6 μm, 1.2×L1 = 180 μm, and 0.8×L1 ≤ X1×(D1+Tg1) ≤ 1.2×L1.

[0177] The above description mainly focuses on the first array B5 and its first strip structure B51. However, the second array B6 and its second strip structure B61 also have the same or similar structural features as the first array B5 and its first strip structure B51.

[0178] <Third Embodiment>

[0179] Please refer to Figures 15 to 18 ,in Figure 15 A cross-sectional schematic diagram of an imaging lens according to a third embodiment of the present invention is shown. Figure 16 Draw Figure 15 A three-dimensional schematic diagram of the object side of the ring-shaped light-blocking element of the imaging lens, and a magnified partial schematic diagram of one part of the ring-shaped light-blocking element. Figure 17 Draw Figure 15 A partial cross-sectional schematic diagram of the ring-shaped light-blocking element of the imaging lens and a partially enlarged schematic diagram of one part of the ring-shaped light-blocking element, and Figure 18 Draw Figure 17 An enlarged schematic diagram of region A18.

[0180] The imaging lens 3 of this embodiment includes a light-shielding element 30, a plurality of lens elements 32, a spacer ring 33, a plurality of light-shielding plates 34, and a fixing ring 36. In this embodiment, the light-shielding element 30 is an annular light-shielding element and is a lens barrel element. In the following description of this embodiment, the annular light-shielding element refers to the light-shielding element 30.

[0181] These lens elements 32 have a central axis CA and are disposed within the lens barrel element (light-shielding element 30). Spacer rings 33 are disposed between adjacent lens elements 32 to maintain the lens spacing and position the lens elements 32 within the lens barrel element (light-shielding element 30). Light-shielding plates 34 are disposed between the lens elements 32 or between the lens elements 32 and the spacer rings 33 to block stray light. Retaining rings 36 fix these lens elements 32 within the lens barrel element (light-shielding element 30). In this embodiment, the lens barrel element (light-shielding element 30) serves as the light-shielding element 30 of the imaging lens 3, providing light-shielding functionality.

[0182] The annular light-shielding element 30 includes a body 300 and a microstructure surface 301. The body 300 has an opening 303, and the central axis CA of the lens element 32 passes through the opening 303.

[0183] In detail, such as Figure 16 As shown, the microstructure surface 301 is disposed on the side surface of the body 300 surrounding the opening 303. In addition, the microstructure surface 301 can be integrally formed with the body 300.

[0184] The microstructure surface 301 includes a plurality of first arrays B7 and a plurality of second arrays B8. Each first array B7 includes two first strip structures B71, and each first strip structure B71 has a long side B7L and a short side B7S smaller than the long side B7L. Each second array B8 includes two second strip structures B81, and each second strip structure B81 has a long side B8L and a short side B8S smaller than the long side B8L.

[0185] The first array B7 and the second array B8 of the microstructure surface 301 are arranged alternately, and in one of the adjacent first arrays B7 and one of the second arrays B8, the short side B7S of each of the first strip structures B71 is oriented toward the long side B8L of one of the second strip structures B81. In this embodiment, the first strip structure B71 extends along the circumferential direction DR1 of the annular light-shielding element 30, and the second strip structure B81 extends along the radial direction DR2 of the annular light-shielding element 30. The first strip structure B71 has an arc and is slightly curved in the direction of its long side B7L.

[0186] like Figure 17 As shown, the microstructure surface 301 is an inclined plane, and the angle θ2 between the microstructure surface 301 and the central axis CA is 80.6 degrees. It should be noted that... Figure 17 The distribution range of the microstructure surface 301 is represented by dashed lines. These dashed lines are for illustrative purposes only and do not represent the actual shape of the microstructure surface 301 or the connection relationship of its components. Figure 17 The outline shown by the dotted line in the text is the limit.

[0187] like Figures 16 to 18As shown, the first strip structure B71 gradually tapers away from the body 300, and the second strip structure B81 also gradually tapers away from the body 300. Specifically, both the first strip structure B71 and the second strip structure B81 taper away from the body 300 along a direction parallel to the central axis CA. Furthermore, the cross-sectional shape of each of the first strip structures B71 on its short side B7S is the same as the cross-sectional shape of each of the second strip structures B81 on its short side B8S. In this embodiment, the cross-sectional shape of each of the first strip structures B71 on its short side B7S is approximately semi-circular, and the cross-sectional shape of each of the second strip structures B81 on its short side B8S is also approximately semi-circular. Specifically, the longer side B7L of each first strip structure B71 that is relatively close to the central axis CA (e.g., ...) Figure 18 The left long side (B7L) of the first strip structure B71 in the middle has a straight section S7 parallel to the central axis CA at the connection of the body 300, which can reduce the difficulty of mold processing and make the mold parting smooth.

[0188] The vertical height of the first strip structure B71 on the body 300 is H1, which satisfies the following condition: H1 = 40 μm.

[0189] The vertical height of the first strip structure B71 on the body 300 is H1, and the length of the short side B7S of each first strip structure B71 is D1, which satisfies the following conditions: D1 = 80 μm and H1 / D1 = 0.5.

[0190] The length of the short side B7S of each first strip structure B71 is D1, and the gap between any two adjacent first strip structures B71 is Tg1, which satisfies the following conditions: Tg1 = 15 μm and D1 / Tg1 = 5.3.

[0191] The number of first strip structures B71 in each first array B7 is X1, which satisfies the following condition: X1 = 2.

[0192] The length of the short side B7S of each first strip structure B71 is D1, the gap between any two adjacent first strip structures B71 is Tg1, the number of first strip structures B71 in each first array B7 is X1, and the length of the long side B8L of each second strip structure B81 is L1, which satisfies the following conditions: L1 = 200 μm and X1×(D1+Tg1) = 190 μm. Wherein, 0.8×L1 = 160 μm, 1.2×L1 = 240 μm, and 0.8×L1 ≤ X1×(D1+Tg1) ≤ 1.2×L1.

[0193] The above description mainly focuses on the first array B7 and its first strip structure B71. However, the second array B8 and its second strip structure B81 also have the same or similar structural features as the first array B7 and its first strip structure B71.

[0194] <Fourth Embodiment>

[0195] Please refer to Figures 19 to 22 ,in Figure 19 A cross-sectional schematic diagram of an imaging lens according to the fourth embodiment of the present invention is shown. Figure 20 Draw Figure 19 A stereoscopic view of the image-side of the ring-shaped light-blocking element of the imaging lens, and enlarged partial views of two parts of the ring-shaped light-blocking element. Figure 21 Draw Figure 19 A partial cross-sectional schematic diagram of the ring-shaped light-blocking element of the imaging lens and a partially enlarged schematic diagram of one part of the ring-shaped light-blocking element, and Figure 22 Draw Figure 21 An enlarged schematic diagram of region A22.

[0196] The imaging lens 4 of this embodiment includes a light-shielding element 40, a plurality of lens elements 42, a spacer ring 43, a plurality of light-shielding plates 44, and a fixing ring 46. In this embodiment, the light-shielding element 40 is an annular light-shielding element and is a lens barrel element. In the following description of this embodiment, the annular light-shielding element refers to the light-shielding element 40.

[0197] These lens elements 42 have a central axis CA and are disposed within the lens barrel element (light-shielding element 40). Spacer rings 43 are disposed between adjacent lens elements 42 to maintain the lens spacing and position the lens elements 42 within the lens barrel element (light-shielding element 40). Light-shielding plates 44 are disposed between the lens elements 42 or between the lens elements 42 and the spacer rings 43 to block stray light. Retaining rings 46 fix these lens elements 42 within the lens barrel element (light-shielding element 40). In this embodiment, the lens barrel element (light-shielding element 40) serves as the light-shielding element 40 of the imaging lens 4, providing light-shielding functionality.

[0198] The annular light-shielding element 40 includes a body 400 and a microstructure surface 401. The body 400 has an opening 403, and the central axis CA of the lens element 42 passes through the opening 403.

[0199] In detail, such as Figure 20 As shown, the microstructure surface 401 is disposed on the image-side surface of the body 400 surrounding the opening 403, thereby blocking stray light from the optical path deflection element (not shown) disposed on the image-side surface of the lens element 42. In addition, the microstructure surface 401 can be integrally formed with the body 400.

[0200] The microstructure surface 401 includes a plurality of first arrays B9 and a plurality of second arrays B10. Each first array B9 includes three first strip structures B91, and each first strip structure B91 has a long side B9L and a short side B9S smaller than the long side B9L. Each second array B10 includes three second strip structures B101, and each second strip structure B101 has a long side B10L and a short side B10S smaller than the long side B10L.

[0201] The first array B9 and the second array B10 of the microstructure surface 401 are arranged alternately, and in one of the adjacent first arrays B9 and one of the second arrays B10, the short side B9S of each of the first strip structures B91 is oriented toward the long side B10L of one of the second strip structures B101.

[0202] In this embodiment, the opening 403 of the body 400 of the annular light-shielding element 40 is non-circular, and the body 400 of the annular light-shielding element 40 has two opposing tangential edges at its outer diameter to accommodate the non-circular opening 403. The non-circular opening 403 has two opposing straight edges 4031 and two opposing curved edges 4032 located between the two straight edges 4031.

[0203] In the region of the microstructure surface 401 adjacent to the curved edge 4032 (e.g. Figure 20 The magnified area indicated on the upper right side (i.e., the microstructure surface 401 region extending from the arc edge 4032 in a direction away from the central axis CA) shows that the first strip structure B91 in each first array B9 extends along the circumferential DR1 of the annular light-shielding element 40, and the second strip structure B101 in each second array B10 extends along the radial DR2 of the annular light-shielding element 40. The first strip structure B91 has an arc and is slightly curved in the direction of its long side B9L.

[0204] In the region of the microstructure surface 401 adjacent to the straight edge 4031 (e.g. Figure 20 (As indicated by the enlarged section on the lower right side), the first strip structures B91 in each of the first arrays B9 are arranged parallel to each other along a first direction DF1, and the second strip structures B101 in each of the second arrays B10 are arranged parallel to each other along a second direction DF2. Furthermore, the first arrays B9 and the second arrays B10 are equidistant from each other and are orthogonal to each other. That is, the first direction DF1 and the second direction DF2 are orthogonal to each other.

[0205] like Figure 21 As shown, the microstructure surface 401 is planar, and the angle θ1 between the microstructure surface 401 and the central axis CA is 90 degrees. It should be noted that... Figure 21The distribution range of the microstructure surface 401 is represented by dashed lines. These dashed lines are for illustrative purposes only and do not represent the actual shape of the microstructure surface 401 or the connection relationship of its components. Figure 21 The outline shown by the dotted line in the text is the limit.

[0206] like Figures 20 to 22 As shown, the first strip structure B91 gradually tapers away from the body 400, and the second strip structure B101 also gradually tapers away from the body 400. Specifically, both the first strip structure B91 and the second strip structure B101 taper away from the body 400 along a direction parallel to the central axis CA. Furthermore, the cross-sectional shape of each of the first strip structures B91 on its short side B9S is the same as the cross-sectional shape of each of the second strip structures B101 on its short side B10S. In this embodiment, the cross-sectional shape of each of the first strip structures B91 on its short side B9S is trapezoidal, and the cross-sectional shape of each of the second strip structures B101 on its short side B10S is also trapezoidal.

[0207] The vertical height of the first strip structure B91 on the body 400 is H1, which satisfies the following condition: H1 = 30 μm.

[0208] The vertical height of the first strip structure B91 on the body 400 is H1, and the length of the short side B9S of each first strip structure B91 is D1, which satisfies the following conditions: D1 = 45 μm and H1 / D1 = 0.67.

[0209] The length of the short side B9S of each first strip structure B91 is D1, and the gap between any two adjacent first strip structures B91 is Tg1, which satisfies the following conditions: Tg1 = 5 μm and D1 / Tg1 = 9.

[0210] The number of first strip structures B91 in each first array B9 is X1, which satisfies the following condition: X1 = 3.

[0211] The length of the short side B9S of each first strip structure B91 is D1, the gap between any two adjacent first strip structures B91 is Tg1, the number of first strip structures B91 in each first array B9 is X1, and the length of the long side B10L of each second strip structure B101 is L1, which satisfies the following conditions: L1 = 150 μm and X1×(D1+Tg1) = 150 μm. Wherein, 0.8×L1 = 120 μm, 1.2×L1 = 180 μm, and 0.8×L1 ≤ X1×(D1+Tg1) = 1.0×L1 ≤ 1.2×L1.

[0212] The above description mainly focuses on the first array B9 and its first strip structure B91. However, the second array B10 and its second strip structure B101 also have the same or similar structural features as the first array B9 and its first strip structure B91.

[0213] <Fifth Embodiment>

[0214] Please refer to Figures 23 to 26 ,in Figure 23 A cross-sectional schematic diagram of an imaging lens according to the fifth embodiment of the present invention is shown. Figure 24 Draw Figure 23 An exploded three-dimensional diagram of the light-shielding element and the optical path deflection element of the imaging lens, and a magnified partial diagram of one part of the light-shielding element. Figure 25 Draw Figure 23 A side view schematic diagram of the light-shielding element and the optical path deflection element of the imaging lens, and a partially enlarged schematic diagram of one of them. Figure 26 Draw Figure 25 An enlarged schematic diagram of region A26 and a partial enlarged schematic diagram of region A26.

[0215] The imaging lens 5 of this embodiment includes a housing 57, a plurality of lens elements 52, a spacer ring 53, a plurality of light-shielding plates 54, a fixing ring 56, an electronic photosensitive element IS, an optical path deflection element 58, a light-shielding element 50, an adhesive element 59, and a filter element FT.

[0216] These lens elements 52 are disposed within the housing 57. Spacer rings 53 are disposed between adjacent lens elements 52 to maintain the lens spacing and position the lens elements 52 within the housing 57. Light-shielding plates 54 are disposed between the lens elements 52 or between the lens element 52 and the spacer rings 53 to block stray light. Retaining rings 56 secure these lens elements 52 within the housing 57. An electronic photosensitive element IS is disposed on the image side of these lens elements 52 and located on the imaging plane IMG.

[0217] An optical path deflection element 58 is located on the imaging optical path PA between these lens elements 52 and the electronic photosensitive element IS, and the optical path deflection element 58 is used to deflect the imaging optical path PA. The optical path deflection element 58 has three reflective surfaces, and these three reflective surfaces sequentially include a first coated reflective surface RF1, an optical surface RF2, and a second coated reflective surface RF3 along the imaging optical path PA. Among them, the first coated reflective surface RF1 and the second coated reflective surface RF3 reflect imaging light through the coating layer on them, while the optical surface RF2 reflects imaging light through the principle of total internal reflection (that is, the imaging light of the imaging lens 5 undergoes total internal reflection at the optical surface RF2). A filter element FT is located on the imaging optical path PA between the optical path deflection element 58 and the electronic photosensitive element IS.

[0218] like Figure 24 As shown, the light-shielding element 50 is disposed on the optical path reversing element 58 and is positioned opposite the optical surface RF2 of the optical path reversing element 58, and the adhesive element 59 is used to fix the light-shielding element 50 on the optical path reversing element 58. In this embodiment, the light-shielding element 50 is a light-shielding sheet with light-shielding function, and the imaging optical path PA passes sequentially through the lens element 52, the optical path reversing element 58 and the filter element FT to reach the electronic photosensitive element IS.

[0219] like Figure 24 and Figure 25 As shown, the light-shielding element 50 includes a body 500 and a microstructure surface 501. The microstructure surface 501 is disposed on the body 500 and can be integrally formed with the body 500. The microstructure surface 501 of the light-shielding element 50 is disposed on the side of the body 500 facing the optical surface RF2 of the light path deflection element 58.

[0220] The microstructure surface 501 includes a plurality of first arrays B13 and a plurality of second arrays B14. Each first array B13 includes three first strip structures B131, and each first strip structure B131 has a long side B13L and a short side B13S smaller than the long side B13L. Each second array B14 includes three second strip structures B141, and each second strip structure B141 has a long side B14L and a short side B14S smaller than the long side B14L.

[0221] The first array B13 and the second array B14 of the microstructure surface 501 are arranged alternately, and in one of the adjacent first arrays B13 and one of the second arrays B14, the short side B13S of the first strip structure B131 is arranged toward the long side B14L of one of the second strip structures B141.

[0222] The first strip structures B131 in each first array B13 are arranged parallel to each other along a first direction DF1, and the second strip structures B141 in each second array B14 are arranged parallel to each other along a second direction DF2. Furthermore, the first arrays B13 and B14 are arranged at equal intervals and are orthogonal to each other. That is, the first direction DF1 and the second direction DF2 are orthogonal to each other.

[0223] like Figure 25 As shown, surface 501 of the microstructure is planar. It should be noted that... Figure 25 The distribution range of the microstructure surface 501 is represented by dashed lines. These dashed lines are for illustrative purposes only and do not represent the actual shape of the microstructure surface 501 or the connection relationship of its components. Figure 25 The outline shown by the dotted line in the text is the limit.

[0224] like Figures 24 to 26 As shown, the first strip structure B131 gradually tapers away from the body 500, and the second strip structure B141 also gradually tapers away from the body 500. Both the first strip structure B131 and the second strip structure B141 taper towards the optical path transition element 58. Furthermore, the cross-sectional shape of each of the first strip structures B131 on its short side B13S is the same as the cross-sectional shape of each of the second strip structures B141 on its short side B14S. In this embodiment, the cross-sectional shape of each of the first strip structures B131 on its short side B13S is approximately triangular, and the cross-sectional shape of each of the second strip structures B141 on its short side B14S is also approximately triangular. It should be noted that... Figure 25 and Figure 26 The component outlines shown are for illustrative purposes only; the thickness, size, and shape of each component are not drawn to scale. This invention does not intend to reproduce the actual components. Figure 25 and Figure 26 The outlines of the components shown are limited to those presented in the text.

[0225] The vertical height of the first strip structure B131 on the body 500 is H1, which satisfies the following condition: H1 = 13 μm.

[0226] The vertical height of the first strip structure B131 on the body 500 is H1, and the length of the short side B13S of each first strip structure B131 is D1, which satisfies the following conditions: D1 = 15 μm and H1 / D1 = 0.87.

[0227] The length of the short side B13S of each first strip structure B131 is D1, and the gap between any two adjacent first strip structures B131 is Tg1, which satisfies the following conditions: Tg1 = 1 μm and D1 / Tg1 = 15.

[0228] The number of first strip structures B131 in each first array B13 is X1, which satisfies the following condition: X1 = 3.

[0229] The length of the short side B13S of each first strip structure B131 is D1, the gap between any two adjacent first strip structures B131 is Tg1, the number of first strip structures B131 in each first array B13 is X1, and the length of the long side B14L of each second strip structure B141 is L1, which satisfies the following conditions: L1 = 50 μm and X1×(D1+Tg1) = 48 μm. Wherein, 0.8×L1 = 40 μm, 1.2×L1 = 60 μm, and 0.8×L1 ≤ X1×(D1+Tg1) ≤ 1.2×L1.

[0230] The top of each first strip structure B131 is rounded, and the radius of curvature of the rounded corner is R1, which satisfies the following condition: R1 = 3 μm.

[0231] like Figure 25 As shown, the thickness of the viscous element 59 is TA, which satisfies the following condition: TA = 20 μm.

[0232] The above description mainly focuses on the first array B13 and its first strip structure B131. However, the second array B14 and its second strip structure B141 also have the same or similar structural features as the first array B13 and its first strip structure B131.

[0233] In this embodiment, the light-shielding element 50 is fixedly mounted on the optical path deflection element 58 by an adhesive element 59, but the present invention is not limited to the aforementioned mounting position of the light-shielding element 50. In other embodiments, the light-shielding element may be mounted on other elements in the imaging lens. For example, please refer to... Figure 27 The diagram illustrates a cross-sectional view of another embodiment of the light-shielding element 50a in the imaging lens 5a according to the fifth embodiment of the present invention. Figure 27 As shown, the light-shielding element 50a is disposed on the housing 57a and is disposed opposite to the optical surface RF2a of the light path turning element 58a, and the adhesive element 59a is used to fix the light-shielding element 50a to the housing 57a.

[0234] <Sixth Embodiment>

[0235] Please refer to Figure 28 and Figure 29 ,in Figure 28 A perspective view of one side of an electronic device according to a sixth embodiment of the present invention is shown, and Figure 29 Draw Figure 28 A three-dimensional diagram of the other side of the electronic device.

[0236] In this embodiment, the electronic device 600 is a smartphone. The electronic device 600 includes multiple imaging lenses 600a, 600b and 600c, a flash module 601, a focus assist module 602, an image signal processor 603, a display module (user interface) 604 and an image software processor (not shown).

[0237] These imaging lenses include an ultra-wide-angle imaging lens 600a, a high-resolution imaging lens 600b, and a telephoto imaging lens 600c. Among them, the ultra-wide-angle imaging lens 600a, the high-resolution imaging lens 600b, and the telephoto imaging lens 600c respectively include the imaging lenses of this utility model.

[0238] The 600a ultra-wide-angle imaging lens is capable of capturing multiple scenes. Figure 30 A schematic diagram illustrating images captured by the 600a ultra-wide-angle imaging lens.

[0239] The high-resolution imaging lens 600b features high resolution and low distortion. The high-resolution imaging lens 600b can further capture… Figure 30 A portion of the image. Figure 31 A schematic diagram illustrating images captured by the 600b high-resolution imaging lens.

[0240] The 600c telephoto lens features high magnification. The 600c telephoto lens can further capture... Figure 31 A portion of the image. Figure 32 A schematic diagram illustrating the image captured by the 600c telephoto imaging lens.

[0241] When the user photographs a subject, the electronic device 600 uses the ultra-wide-angle imaging lens 600a, the high-resolution imaging lens 600b, or the telephoto imaging lens 600c to focus light and capture an image. It activates the flash module 601 for supplemental lighting and uses the subject distance information provided by the focus assist module 602 for rapid focusing. The image signal processor 603 then performs image optimization processing to further improve the image quality produced by the imaging lens, while also providing zoom functionality. The focus assist module 602 can employ an infrared or laser focus assist system to achieve rapid focusing. The display module 604 can be a touchscreen with touch functionality, allowing manual adjustment of the shooting angle, switching between different imaging lenses, and utilizing the diverse functions of the image software processor for image capture and processing (or shooting can be performed using a physical shooting button). The image processed by the image software processor is displayed on the display module 604.

[0242] <Seventh Embodiment>

[0243] Please refer to Figure 33 The diagram illustrates a perspective view of one side of an electronic device according to the seventh embodiment of the present invention.

[0244] In this embodiment, the electronic device 700 is a smartphone. The electronic device 700 includes imaging lenses 700a, 700b, 700c, 700d, 700e, 700f, 700g, 700h, and 700i, a flash module 701, an image signal processor, a display module, and an image software processor (not shown). Imaging lenses 700a, 700b, 700c, 700d, 700e, 700f, 700g, 700h, and 700i are all disposed on the same side of the electronic device 700, while the display module is disposed on the other side. Imaging lenses 700a, 700b, and 700c may, for example, include imaging lenses from different embodiments of this invention.

[0245] Imaging lens 700a is a telephoto imaging lens with a reversible optical path; imaging lens 700b is a telephoto imaging lens with a reversible optical path; imaging lens 700c is a telephoto imaging lens; imaging lens 700d is a telephoto imaging lens; imaging lens 700e is a wide-angle imaging lens; imaging lens 700f is a wide-angle imaging lens; imaging lens 700g is an ultra-wide-angle imaging lens; imaging lens 700h is a Time of Flight (ToF) imaging lens; and imaging lens 700i is an ultra-wide-angle imaging lens. In this embodiment, imaging lenses 700i, 700a, 700b, 700c, 700d, 700e, 700f, and 700g have different viewing angles, allowing the electronic device 700 to provide different magnifications to achieve optical zoom shooting effects. Furthermore, imaging lenses 700a and 700b are telephoto imaging lenses configured with light-reflecting elements. Additionally, imaging lens 700h can acquire depth information of the image. The electronic device 700 described above is exemplified by including multiple imaging lenses 700a, 700b, 700c, 700d, 700e, 700f, 700g, 700h, and 700i, but the number and configuration of the imaging lenses are not intended to limit this invention. When a user photographs a subject, the electronic device 700 uses imaging lenses 700a, 700b, 700c, 700d, 700e, 700f, 700g, 700h, or 700i to focus light and capture an image, activates the flash module 701 for supplemental lighting, and performs subsequent processing in a manner similar to the aforementioned embodiments, which will not be elaborated upon here.

[0246] <Eighth Embodiment>

[0247] Please refer to Figures 34 to 36 ,in Figure 34 A perspective view of an electronic device according to the eighth embodiment of the present invention is shown. Figure 35 Draw Figure 34 A side view of the electronic device, and Figure 36 Draw Figure 34 A top view of the electronic device.

[0248] In this embodiment, the electronic device 800 is a car. The electronic device 800 includes a plurality of automotive imaging lenses 800a, and these imaging lenses 800a respectively include, for example, the imaging lenses of this invention. These imaging lenses 800a can be applied, for example, to panoramic driving assistance systems, driving recorders, and reversing cameras.

[0249] like Figure 34 As shown, the imaging lens 800a can be installed, for example, around the vehicle to capture images of the car's surroundings, helping to identify road conditions outside the vehicle and thus enabling automated driving assistance functions. Furthermore, the images can be combined into a panoramic view using an image software processor, providing images of the driver's blind spots, allowing the driver to monitor the surroundings of the vehicle for easier driving and parking.

[0250] like Figure 35 As shown, the imaging lens 800a can be, for example, respectively positioned below the left and right rearview mirrors, wherein the viewing angle of the imaging lens 800a can be 40 degrees to 90 degrees, used to capture image information within the range of the left and right lanes.

[0251] like Figure 36 As shown, the imaging lens 800a can also be installed, for example, in or below the left and right rearview mirrors and inside the front and rear windshields, thereby helping the driver obtain information about the external space outside the cockpit, providing more perspectives to reduce blind spots and improve driving safety.

[0252] The imaging lens of this invention is not limited to applications in smartphones, panoramic driving assistance systems, dashcams, and reversing cameras. It can be applied to various mobile focusing systems as needed, and features excellent aberration correction and good image quality. For example, the imaging lens can be used in a wide range of electronic devices, including 3D image capture, digital cameras, mobile devices, tablet computers, smart TVs, network monitoring equipment, multi-lens devices, recognition systems, drones, motion-sensing game consoles, and wearable devices. The aforementioned electronic devices are merely illustrative examples of practical applications of this invention and do not limit the scope of application of the imaging lens.

[0253] Although the present invention has been disclosed above with reference to the foregoing embodiments, these embodiments are not intended to limit the present invention. Any modifications and refinements made without departing from the spirit and scope of the present invention are within the scope of patent protection of the present invention. For the scope of protection defined by the present invention, please refer to the appended claims.

Claims

1. An imaging lens, characterized in that, Include: At least one lens element having a central axis; and A ring-shaped light-shielding element, comprising: A body having an opening, and the central axis passing through the opening; and A microstructured surface is disposed on the body surrounding the opening, and the microstructured surface includes: A plurality of first arrays, each first array comprising at least two first strip structures, each first strip structure having a long side and a short side smaller than the long side, and at least two first strip structures gradually decreasing in size away from the body; and Multiple second arrays, each second array comprising at least two second strip structures, each second strip structure having a long side and a short side smaller than the long side, and at least two second strip structures gradually shrinking in a direction away from the body; The first array and the second array are arranged alternately, and in one of the adjacent first arrays and one of the second arrays, the short side of each of the two first strip structures is oriented toward the long side of one of the second strip structures.

2. The imaging lens according to claim 1, characterized in that, At least two of the first strip-shaped structures have a vertical height of H1 on the body, satisfying the following condition: 1 μm ≤ H1 ≤ 50 μm.

3. The imaging lens according to claim 2, characterized in that, At least two of the first strip-shaped structures have a vertical height of H1 on the body, satisfying the following condition: 10 μm ≤ H1 ≤ 25 μm.

4. The imaging lens according to claim 1, characterized in that, At least two of the first strip structures have a vertical height of H1 on the body, and the length of the short side of each of the first strip structures is D1, satisfying the following condition: 0.3 ≤ H1 / D1 ≤ 1.

2.

5. The imaging lens according to claim 1, characterized in that, The length of the short side of each of the first strip structures is D1, and the gap between any two adjacent first strip structures is Tg1, satisfying the following condition: 2 ≤ D1 / Tg1 ≤ 20.

6. The imaging lens according to claim 1, characterized in that, The number of at least two first strip structures in each of the first arrays is X1, which satisfies the following condition: 2 ≤ X1 ≤ 5。 7. The imaging lens according to claim 1, characterized in that, The length of the short side of each of the first strip structures is D1, the gap between any two adjacent first strip structures is Tg1, the number of at least two first strip structures in each first array is X1, and the length of the long side of each second strip structure is L1, which satisfies the following conditions: 0.8×L1 ≤ X1×(D1+Tg1) ≤ 1.2×L1.

8. The imaging lens according to claim 1, characterized in that, The top of each of the first strip structures is rounded, and the radius of curvature of the rounded corner is R1, which satisfies the following condition: 2 μm ≤ R1 ≤ 20 μm.

9. The imaging lens according to claim 1, characterized in that, At least two of the first strip structures extend circumferentially along the annular light-shielding element, and at least two of the second strip structures extend radially along the annular light-shielding element.

10. The imaging lens according to claim 1, characterized in that, At least two of the first strip structures are arranged parallel to each other, and at least two of the second strip structures are arranged parallel to each other.

11. The imaging lens according to claim 1, characterized in that, The angle between the surface of the microstructure and the central axis is between 45 degrees and 135 degrees.

12. The imaging lens according to claim 11, characterized in that, At least two of the first strip structures each gradually decrease in size along a direction parallel to the central axis.

13. The imaging lens according to claim 1, characterized in that, The cross-sectional shape of each of the first strip structures on its short side is the same as the cross-sectional shape of each of the second strip structures on its short side.

14. The imaging lens according to claim 1, characterized in that, The annular light-shielding element is a lens barrel element used to house the at least one lens element.

15. The imaging lens according to claim 1, characterized in that, An anti-reflective film is coated on the surface of the microstructure.

16. An electronic device, characterized in that, Include: The imaging lens according to claim 1.

17. An imaging lens, characterized in that, Include: At least one lens element, and an imaging optical path passing through the at least one lens element; and A light-shielding element, comprising: One entity; and A microstructured surface is disposed on the body, and the microstructured surface comprises: A plurality of first arrays, each first array comprising at least two first strip structures, each first strip structure having a long side and a short side smaller than the long side, at least two first strip structures being arranged parallel to each other, and at least two first strip structures gradually decreasing in size away from the body; and A plurality of second arrays, each second array comprising at least two second strip structures, each second strip structure having a long side and a short side smaller than the long side, at least two second strip structures being arranged parallel to each other, and at least two second strip structures gradually decreasing in size in a direction away from the body; The first array and the second array are arranged alternately, and in one of the adjacent first arrays and one of the second arrays, the short side of each of the two first strip structures is oriented toward the long side of one of the second strip structures.

18. The imaging lens according to claim 17, characterized in that, At least two of the first strip-shaped structures have a vertical height of H1 on the body, satisfying the following condition: 1 μm ≤ H1 ≤ 50 μm.

19. The imaging lens according to claim 17, characterized in that, At least two of the first strip structures have a vertical height of H1 on the body, and the length of the short side of each of the first strip structures is D1, satisfying the following condition: 0.3 ≤ H1 / D1 ≤ 1.

2.

20. The imaging lens according to claim 17, characterized in that, The length of the short side of each of the first strip structures is D1, and the gap between any two adjacent first strip structures is Tg1, satisfying the following condition: 2 ≤ D1 / Tg1 ≤ 20.

21. The imaging lens according to claim 17, characterized in that, The length of the short side of each of the first strip structures is D1, the gap between any two adjacent first strip structures is Tg1, the number of at least two first strip structures in each first array is X1, and the length of the long side of each second strip structure is L1, which satisfies the following conditions: 0.8×L1 ≤ X1×(D1+Tg1) ≤ 1.2×L1.

22. The imaging lens according to claim 17, characterized in that, The top of each of the first strip structures is rounded, and the radius of curvature of the rounded corner is R1, which satisfies the following condition: 2 μm ≤ R1 ≤ 20 μm.

23. The imaging lens according to claim 17, characterized in that, Also includes: An optical path reversing element is used to revers the imaging optical path, and the optical path reversing element comprises: An optical surface, wherein the imaging light from the imaging lens undergoes at least one total internal reflection at the optical surface; The light-shielding element is disposed relative to the optical surface.

24. The imaging lens according to claim 23, characterized in that, Also includes: An adhesive element is used to fix the light-shielding element; The thickness of the viscous element is TA, which satisfies the following conditions: 10 μm ≤ TA ≤ 50 μm.

Images