Lens device

Abstract

A lens assembly includes a support, at least one lens element, and an annular body. The support forms an accommodating space for receiving the lens element and the annular body. The annular body includes a component body and a microstructure. The component body surrounds an axis and has a first mounting surface and a second mounting surface, with the optical axis of the lens element coinciding with the axis. The microstructure has a plurality of protrusions disposed on the component body and protruding from the first and second mounting surfaces. Each protrusion has a first end and a second end disposed opposite to the first end in the direction of extension of the axis. The protrusion has a first cross-section perpendicular to the axis at the first end and a second cross-section perpendicular to the axis at the second end, the first and second cross-sections having different geometries.

Description

[Technical Field]

[0001] The present invention relates to a technical field of an optical lens component, particularly a lens device having a toroid with a microstructure capable of avoiding the formation of stray light. [Previous Technology]

[0002] The lens is composed of a bracket and multiple lenses mounted on the bracket, the inner peripheral surface of the bracket forms a plurality of mounting surfaces for correspondingly mounting the multiple lenses, a spacer ring is provided between two adjacent lenses to keep the lenses positioned, the outermost lens is positioned by a pressure ring on the bracket and pressed to the outermost lens. Pressure rings, spacer rings or brackets on surfaces close to the lens may cause the light passing through the lens to be reflected and form stray light, which can affect the imaging quality of the lens if it reaches the image sensor. [Invention Contents]

[0003] In view of this, the purpose of the present invention is to propose a lens device, especially a lens device with a lens positioning part that eliminates stray light, which solves the problem of imaging quality of the image sensor that cannot be completely avoided by producing stray light by the previous technology.

[0004] One embodiment of the lens device of the present invention includes a bracket, at least one lens, and an annular body. The stent forms a holding space to accommodate the lens and annular body. The toroid includes a part body as well as a microstructure. The body of the component is surrounded by an axis, the body of the component has a first disposed surface. The microstructure has a complex number of convex parts that protrude over the first setup surface. Each convex part has a first end and a second end set opposite the direction of extension of the first end at the axis, the convex part at the first end has a first section perpendicular to the axis, the convex part has a second section perpendicular to the axis, the first section has a different geometry from the second.

[0005] In another embodiment, the first section has a first base edge as well as a first vertex, the first base edge is located on the first setup surface and has a first width, the first vertex and the first base edge have a first height, the second section has a second base edge as well as a second vertex, the second bottom edge is located The first disposition surface and having a second width, the second vertex and the second base edge having a second height, the convex part forming an extension between the first vertex and the second vertex along the direction of extension, the extension being a straight line or a curve;

[0006] In another embodiment, the first height is greater than the second height; or the first height is less than the second height.

[0007] In another embodiment, the midpoint of the first base to the midpoint of the second base has an extension length L, and an inclination angle θ is formed between the extension line and the axis, the first height H1; wherein the lens device satisfies at least any one or a combination of the following conditions: 0.06 mm ≤ L ≤ 0.3 mm; 1° < θ < 10°; 3.3 degrees / mm < θ / L < 167 degrees / mm; 0.9 ≤ L / H1 ≤ 7.2.

[0008] In another embodiment, the first height of one convex part is greater than the first height of an adjacent convex part, and the first height of one convex part is equal to the second height of an adjacent convex part.

[0009] In another embodiment, the change from the first width to the second width is a linear change. In another embodiment, the distance between two adjacent first vertices is the vertex pitch d, and the convex part has an apex angle δ at the first vertex; wherein the lens device satisfies at least any one or a combination of the following conditions: 0.03 mm < d < 0.08 mm; 45° < δ < 75°; 560 degrees / mm < δ / d < 2500 degrees / mm; wherein the first height is greater than the second height and the first width is greater than the second width; or the second height is greater than the first height and the second width is greater than the first width.

[0010] Another embodiment of the lens device of the present invention includes a bracket, at least one lens, and an annular body. The bracket forms an accommodation space for accommodating the lens and the annular body. The annular body includes a component body, which includes an outer peripheral wall and an inner peripheral wall disposed opposite to the outer peripheral wall. The outer peripheral wall and the inner peripheral wall surround an axis. The inner peripheral wall has a first setting surface and a second setting surface, and the first setting surface and the second setting surface form a stepped structure. A microstructure is disposed on the first setting surface and the second setting surface. The microstructure has a plurality of convex parts, and the convex parts protrude from the first setting surface and the second setting surface, and the convex parts extend in the direction of the axis. The convex parts have a first extension length L1 along the axis on the first setting surface, and the convex parts have a second extension length L2 along the axis on the second setting surface; wherein the lens device satisfies at least any one or a combination of the following conditions: 0.06 mm ≤ L1 ≤ 0.3 mm; 0.06 mm ≤ L2 ≤ 0.3 mm; L1 / L2 > 2.7; L2 / L1 < 0.35.

[0011] In another embodiment, the shapes of the first cross-section and the second cross-section can be triangular or trapezoidal or other shapes.

[0012] In another embodiment, the first setting surface is provided with N1 convex portions, and the second setting surface is provided with N2 convex portions; wherein the lens device satisfies at least any one or a combination of the following conditions: 580 < N1 < 860; 580 < N2 < 860; 1930 / mm < N1 / L1 < 14400 / mm.

[0013] The annular body of the lens device of the present invention forms a microstructure by arranging a microstructure on the inner peripheral wall. The microstructure includes a plurality of convex portions, and each convex portion extends along the axial direction to form a rib shape. The first cross-section at the first end of the convex portion and the second cross-section at the second end have different geometric shapes, so that the microstructure can have convex portions in the shapes of "inclined sawtooth", "staggered sawtooth", and "transverse cone". Since the convex portions extend along the axial direction, the light rays reflected by the convex portions can be far away from the image sensor at the end of the lens, avoiding the formation of overlapping images of stray light rays on the image sensor.

[0014] In addition, the annular body of the present invention forms a microstructure by the first setting surface and the second setting surface arranged in a stepped manner on the inner peripheral wall. After the stray light rays are reflected twice by the microstructures on the first setting surface and the second setting surface, they can be further away from the image sensor, and can more effectively avoid the influence of stray light rays on the imaging effect on the image sensor.

Brief Description of the Drawings

[0015] FIG. 1 is a cross-sectional view of the lens structure configured with the present invention.

[0015] FIG. 2 is a three-dimensional view of the first embodiment of the annular body of the present invention.

[0015] FIG. 3 is a partial enlarged view of the annular body in FIG. 2.

[0015] FIG. 4 is a cross-sectional view of the annular body in FIG. 2.

[0015] FIG. 5 is a partial three-dimensional view of the second embodiment of the annular body of the present invention.

[0015] FIG. 6 is a three-dimensional view of another perspective of the annular body in FIG. 5.

[0015] FIG. 7 is a cross-sectional view of the annular body in FIG. 5.

[0015] FIG. 8 is a partial three-dimensional view of the third embodiment of the annular body of the present invention.

[0015] FIG. 9 is a three-dimensional view of another perspective of the annular body in FIG. 8.

[0015] Figure 10 is a cross-sectional view of the annular body in Figure 8.

[0015] Figure 11 is a partial perspective view of the fourth embodiment of the annular body of the present invention.

[0015] Figure 12 is a partial enlarged view of the annular body in Figure 11.

[0015] Figure 13 is a partial perspective view of the fifth embodiment of the annular body of the present invention.

Implementation Method

[0016] Please refer to Figure 1, which illustrates the lens structure of the lens device of the present invention. The lens structure 1 includes a support 10, at least one lens 20, at least one annular body 100, and an image sensor (not shown). The support 10 forms an accommodating space for accommodating at least one lens 20 and at least one annular body 100. The annular body 100 may be a spacer ring, a pressure ring, or an annular structure of the support 10, but is not limited thereto. Light from an object passes from an object side through the lens 20 and the annular body 100 to the image sensor closest to the image side. The support 10 is cylindrical and includes an outer peripheral surface 11 and an inner peripheral surface 12, which surround an axis X. The inner peripheral surface 12 includes a plurality of mounting surfaces 12a and connecting surfaces 12b arranged in a stepped manner. The mounting surfaces 12a are used to mount at least one lens 20. An annular body 100 is provided between two adjacent lenses 20 that are relatively far apart, so that the two lenses 20 are kept positioned on the support 10. The annular body 100 may be provided on the side of the lens 20 closest to the image side, so that the lens 20 closest to the image side is kept positioned on the support 10. The optical axis of the lens 20 coincides with the axis X.

[0017] Since the support 10 or the ring 100 both have a surface facing the lens 20, they may reflect light and generate stray light, which will affect the imaging and result in poor image quality. Therefore, the stray light elimination lens positioning component of the present invention can be applied to the ring 100 and disposed between the lens 20 and the object side, between the lenses 20, or between the lens 20 and the image sensor.

[0018] Please refer to Figures 2, 3, and 4, which illustrate a first embodiment of the annular body of the lens device of the present invention. The annular body 100 of this embodiment includes a component body 110 and a microstructure 120. The component body 110 is annular or cylindrical, and includes an outer peripheral wall 111 and an inner peripheral wall 112, which surround the aforementioned axis X. The inner peripheral wall 112 has a plurality of mounting surfaces 112a, 112b, 112c, and 112d. These surfaces are all annular and arranged in a stepped configuration along the X-axis. A microstructure 120 is formed on a first mounting surface 112a and a second mounting surface 112b among the mounting surfaces 112a, 112b, 112c, and 112d. The first mounting surface 112a is closer to the lens than the second mounting surface 112b. Alternatively, the first mounting surface 112a may be closer to an object side (not shown), while the second mounting surface may be closer to an image side (not shown). However, this invention is not limited to this; the microstructure 120 may be located at at least two of the mounting surfaces 112a, 112b, 112c, and 112d. In other words, at least two of the mounting surfaces 112a, 112b, 112c, and 112d may have the microstructure 120.

[0019] The microstructure 120 includes a plurality of protrusions 121. In this embodiment, each protrusion 121 is rib-shaped. The protrusions 121 extend along the direction of the axis X, and the two ends of the protrusions 121 on the first mounting surface 112a are flush with the two ends of the first mounting surface 112a. The two ends of the protrusions 121 on the second mounting surface 112b are also flush with the two ends of the second mounting surface 112b. That is, in this embodiment, the protrusions 121 extend along a direction parallel to the axis X. In this embodiment, the protrusions 121 are arranged along a circumferential direction relative to the axis X on the entire first mounting surface 112a and the entire second mounting surface 112b. The cross-section of each protrusion 121 is triangular, but the present invention is not limited to this. In other embodiments, the cross-section of each protrusion 121 may also be trapezoidal or other shapes.

[0020] The protrusion 121 of the first setting surface 112a has a first extension length L1 along the direction of the axis X, and the protrusion 121 of the second setting surface 112b has a second extension length L2 along the direction of the axis X. The data ranges of the first extension length L1 and the second extension length L2, and the ratio range of the first extension length L1 to the second extension length L2, are as follows: 0.06mm ≤ first extension length L1 ≤ 0.3mm, 0.06mm ≤ second extension length L2 ≤ 0.3mm, L1 / L2 > 2.7 and L2 / L1 < 0.35. In this embodiment, the first extension length L1 is 0.258 mm and the second extension length L2 is 0.084 mm, or the first extension length L1 is 0.265 mm and the second extension length L2 is 0.087 mm, or the first extension length L1 is 0.087 mm and the second extension length L2 is 0.258 mm, or the first extension length L1 is 0.084 mm and the second extension length L2 is 0.265 mm. In other words, the lens device must satisfy at least one or a combination of the following conditions: 0.06 mm ≤ L1 ≤ 0.3 mm; 0.06 mm ≤ L2 ≤ 0.3 mm; L1 / L2 > 2.7; L2 / L1 < 0.35. Satisfying the aforementioned data range and relationship can effectively block stray light and ghosting in the lens device, preventing unnecessary light from reaching the image sensing element, thus significantly improving the ghosting and stray light problems of the lens device.

[0021] The first mounting surface 112a has N1 protrusions 121, and the second mounting surface 112b has N2 protrusions 121. The number of protrusions 121 is related to the width of each protrusion 121 on the first mounting surface 112a or the second mounting surface 112b. Similarly, in a 360-degree surrounding structure, the larger the width of the protrusion 121, the fewer the number of protrusions 121; conversely, the smaller the width of the protrusion 121, the more the number of protrusions 121. The data ranges for the number of protrusions 121 N1 on the first mounting surface 112a and the number of protrusions 121 N2 on the second mounting surface 112b are as follows: 580. <n1<860個，580個<n2<860個，其中，第一設置表面112a的凸部121數量n1與第一延伸長度l1的比值如下：1930個 mm<n1 l1<14400個 mm。本實施例在第一設置表面112a的凸部121設有720個，在第二設置表面112b的凸部121也設有720個，但本發明不限於此，n1可以是大於n2，或n1也可以是小於n2。換言之，鏡頭裝置至少滿足以下條件中任一項或其組合：580個<n1<860個；580個<n2<860個；1930個 mm。滿足前述數據範圍及關係式，具有較佳的製造良率並能夠降低生產成本，以有效率的製作模式來克服雜散光與鬼影問題，進一步使鏡頭裝置取得良好的成像品質。

[0022] Please refer to Figures 5, 6, and 7, which illustrate a second embodiment of the annular body of the present invention. This embodiment has a structure that is partially the same as that of the first embodiment; therefore, the same elements are represented by the same symbols and their descriptions are omitted. In this embodiment, the protrusion 121 disposed on the first mounting surface 112a has a first end 1211 and a second end 1212 disposed opposite to the first end 1211 in the extending direction of the axis X. The first end 1211 is the end away from the second mounting surface 112b, and the second end 1212 is the end close to the second mounting surface 112b. In this embodiment, the first end 1211 and the second end 1212 are respectively flush with both ends of the first mounting surface 112a. The protrusion 121 has a first cross-section 121a perpendicular to the axis X at the first end 1211, and the protrusion 121 has a second cross-section 121b perpendicular to the axis X at the second end 1212. In this embodiment, the first cross-section 121a is a triangle, and the second cross-section 121b is another triangle of a different size than the triangle of the first cross-section 121a. In other embodiments, the first and second cross-sections may also be trapezoids or other shapes.

[0023] The first cross-section 121a has a first bottom edge 121a1 and a first vertex 121a2. The first bottom edge 121a1 is located on the inner peripheral wall 112 and has a first width W1. The first vertex 121a2 and the first bottom edge 121a1 have a first height H1. The second cross-section 121b has a second bottom edge 121b1 and a second vertex 121b2. The second bottom edge 121b1 is located on the inner peripheral wall 112 and has a second width W2. The second vertex 121b2 and the second bottom edge 121b1 have a second height H2. In this embodiment, the first height H1 is greater than the second height H2. The range of the first height H1 is between 0.04 and 0.7, and the range of the second height H2 is between 0.04 and 0.6. For example, the first height H1 is 0.624 mm, and the second height H2 is 0.0416 mm. That is, the height range of each section of the protrusion 121 along the axis X is 0.052 mm ± 20%, and the first height H1 is greater than the second height H2. The extension line LX between the first vertex 121a2 and the second vertex 121b2 is a straight line, but the present invention is not limited to this. In other embodiments, the extension line LX between the first vertex 121a2 and the second vertex 121b2 can also be a curve. The extension line LX forms an inclination angle θ with the axis X, and the inclination angle θ satisfies 1°. <θ<10o。第一底邊121a1的中點至第二底邊121b1的中點之間的距離定義為上述第一延伸長度l1(延伸長度l)，本實施例的第一延伸長度l1為0.25mm，第一延伸長度l1的範圍為0.06mm≦l1≦0.3mm，且傾斜角θ與第一延伸長度l1的比值為3.3度 mm<θ l1<167度 mm，第一延伸長度l1與第一高度h1的比值為0.9≦l1 h1≦7.2。本實施例的第一寬度w1等於第二寬度w2，但本發明不限於此，第一寬度w1也可以與第二寬度w2不相等，例如第一寬度w1是大於第二寬度w2，或者，第一寬度w1是小於第二寬度w2。換言之，鏡頭裝置至少滿足以下條件中任一項或其組合：0.06mm≦l≦0.3mm；1°<θ<10°；3.3度 l<167度 mm；0.9≦l h1≦7.2。滿足前述數據範圍及關係式，將使得鏡頭裝置能夠獲得良好的遮擋鬼影和雜散光的效果，進而在攝像時得到品質良好的成像。

[0024] Please refer to Figures 8, 9, and 10, which illustrate a third embodiment of the annular body of the present invention. This embodiment has a structure that is partially the same as that of the second embodiment, therefore the same elements are represented by the same symbols and their descriptions are omitted. In this embodiment, the first height H1 of one protrusion 121 is greater than the first height H1 of the adjacent protrusion 121, and the first height H1 of one protrusion 121 is equal to the second height H2 of the adjacent protrusion 121, that is, forming a structure in which the inclination directions of the two adjacent protrusions 121 are opposite. However, the present invention is not limited to this. In other embodiments, the first height H1 of one protrusion 121 and the second height H2 of the adjacent protrusion 121 may not be equal, or one or more protrusions 121 with opposite inclination directions may be provided at a fixed interval of several protrusions 121 with the same inclination direction, or one or more protrusions 121 with opposite inclination directions may be provided at a random interval of several protrusions 121 with the same inclination direction. In addition, as in the aforementioned second embodiment, this embodiment also satisfies the following: the inclination angle θ satisfies 1°. <θ<10°、第一延伸長度l1的範圍為0.06mm≦l1≦0.3mm、傾斜角θ與第一延伸長度l1的比值為3.3度 mm<θ l1<167度 mm、以及第一延伸長度l1與第一高度h1的比值為0.9≦l1 h1≦7.2。

[0025] Please refer to Figures 11 and 12, which illustrate a fourth embodiment of the annular body of the present invention. This embodiment has a structure that is partially the same as that of the second embodiment; therefore, the same elements are represented by the same symbols and their descriptions are omitted. In this embodiment, the first width W1 of the protrusion 121 is greater than the second width W2, and the second width W2 is 0, that is, the protrusion 121 of this embodiment is formed into a cone shape. The distance between the first vertices 121a2 of two adjacent protrusions 121 is the vertex pitch d, 0.03 mm. <d<0.08mm，每個凸部121於第一頂點121a2處具有一頂角δ，45°<δ<75°，頂角δ與頂點節距d的比值為560度 mm<δ d<2500度 mm。換言之，鏡頭裝置至少滿足以下條件中任一項或其組合：0.03mm<d<0.08mm；45°<δ<75°；560度 mm。滿足前述數據範圍及關係式，將使得鏡頭裝置能夠解決鬼影和雜散光的問題，以獲得良好的成像品質。

[0026] Please refer to Figure 13, which shows a fifth embodiment of the annular body of the present invention. This embodiment has a structure that is partially the same as that of the fourth embodiment, therefore the same elements are represented by the same symbols and their descriptions are omitted. In this embodiment, the second height H2 of the protrusion 121 is greater than the first height H1, and the second width W2 is greater than the first width W1, and the first width W1 is 0, that is, the protrusion 121 of this embodiment is formed into a cone shape. The cone-shaped extension direction of the protrusion 121 of this embodiment is different from the cone-shaped extension direction of the fourth embodiment. The distance between the second vertices 121b2 of two adjacent protrusions 121 is the vertex pitch d, 0.03 mm. <d<0.08mm，每個凸部121於第二頂點121b2處具有一頂角δ，45°<δ<75°，頂角δ與頂點節距d的比值為560度 mm<δ d<2500度 mm。換言之，鏡頭裝置至少滿足以下條件中任一項或其組合：0.03mm<d<0.08mm；45°<δ<75°；560度 mm。滿足前述數據範圍及關係式，將使得鏡頭裝置能夠解決鬼影和雜散光的問題，以獲得良好的成像品質。

[0027] The annular body of the present invention has a microstructure on its inner peripheral wall. The microstructure includes a plurality of protrusions, each protrusion extending along the axial direction to form a rib. The first cross-section of the first end of the protrusion and the second cross-section of the second end can have different geometric shapes, thus enabling the microstructure to have "tilted sawtooth", "interlaced sawtooth" and "conical" protrusions. Since the protrusions extend along the axial direction, the light reflected by the protrusions can be kept away from the image sensor at the end of the lens device, avoiding stray light from forming poor quality, speckled, or overlapping images on the image sensor.

[0028] Furthermore, the annular body of the present invention forms microstructures on the first and second mounting surfaces arranged in a stepped manner on the inner peripheral wall. After stray light is reflected twice by the microstructures on the first and second mounting surfaces, it can be further away from the image sensor, which can more effectively prevent stray light from affecting the imaging effect on the image sensor. However, the present invention is not limited to this. The stepped shape of the inner peripheral wall can be formed on more than just two mounting surfaces. When the structure of the inner peripheral wall allows, the configuration of the microstructures can be adjusted according to the needs and in combination with the optical system features of the lens group. For example, it can be formed on only one mounting surface or on three mounting surfaces.

[0029] However, the above description is merely a preferred embodiment of the present invention and should not be construed as limiting the scope of the invention. Any simple equivalent changes and modifications made in accordance with the claims and description of the present invention are still within the scope of the patent. Furthermore, any embodiment or claim of the present invention does not need to achieve all the objectives, advantages, or features disclosed in the present invention. In addition, the abstract and headings are merely for assisting in patent document searches and are not intended to limit the scope of the present invention. Furthermore, the terms "first," "second," etc., mentioned in this specification or claims are only used to name elements or distinguish different embodiments or scopes, and are not used to limit the upper or lower limit of the number of elements.

Claims

1. A lens device, comprising: A bracket; At least one lens; An annular body; The bracket forms a receiving space for accommodating the at least one lens and the annular body; The annular body includes: a component body that surrounds an axis, and the component body has a first setting surface; And a microstructure having a plurality of convex portions that protrude from the first setting surface; wherein each convex portion has a first end and a second end that is disposed opposite to the first end in the extending direction of the axis. The convex portion has a first cross-section perpendicular to the axis at the first end, and the convex portion has a second cross-section perpendicular to the axis at the second end. The first cross-section and the second cross-section have different geometric shapes; wherein the first cross-section has a first bottom edge and a first apex. The first bottom edge is located on the first setting surface and has a first width. The first apex and the first bottom edge have a first height. The second cross-section has a second bottom edge and a second apex. The second bottom edge is located on the first setting surface and has a second width. The second apex and the second bottom edge have a second height. The convex portion forms an extension line along the extending direction between the first apex and the second apex. The extension line is a straight line or a curve; the first width is equal to the second width, or the first width is not equal to the second width.

2. The lens device according to claim 1, wherein the first height is greater than the second height; or the first height is less than the second height.

3. The lens device according to claim 2, wherein the distance from the midpoint of the first bottom edge to the midpoint of the second bottom edge has an extension length (L), and an inclination angle (θ) is formed between the extension line and the axis, and the first height (H1); wherein the lens device satisfies at least any one or a combination of the following conditions: 0.06 mm ≤ L ≤ 0.3 mm; 1° < θ < 10°; 3.3 degrees / mm < θ / L < 167 degrees / mm; 0.9 ≤ L / H1 ≤ 7.

2.

4. The lens device according to claim 1, wherein the first height of one convex portion is greater than the first height of an adjacent convex portion, and the first height of one convex portion is equal to the second height of an adjacent convex portion.

5. The lens device according to claim 1, wherein the change from the first width to the second width is a linear change.

6. The lens device according to claim 1, wherein the distance between two adjacent first apexes is the apex pitch (d), and the convex portion has an apex angle (δ) at the first apex; wherein the lens device satisfies at least any one or a combination of the following conditions: 0.03 mm < d < 0.08 mm; 45° < δ < 75°; 560 degrees / mm < δ / d < 2500 degrees / mm; wherein the first height is greater than the second height and the first width is greater than the second width; or the second height is greater than the first height and the second width is greater than the first width.

7. A lens device, comprising: A bracket; At least one lens; An annular body; The bracket forms a receiving space for accommodating the at least one lens and the annular body; The annular body includes: a component body, which includes an outer peripheral wall and an inner peripheral wall disposed opposite to the outer peripheral wall, the outer peripheral wall and the inner peripheral wall are arranged around an axis, the inner peripheral wall has a first disposed surface and a second disposed surface, the first disposed surface and the second disposed surface forming a stepped structure; A microstructure is disposed on the first and second surfaces. The microstructure has a plurality of protrusions protruding from the first and second surfaces and extending along the axis. Each protrusion has a first end and a second end opposite to the first end in the direction of the axis's extension. The first end of the protrusion has a first cross-section perpendicular to the axis, and the second end of the protrusion has a second cross-section perpendicular to the axis. The first cross-section has a first base and a first vertex. The first base has a first width, and the first vertex and the first base have a first height. The second cross-section has a second base and a second vertex. The edge has a second width, the second vertex and the second bottom edge have a second height, the protrusion forms an extension line along the extension direction between the first vertex and the second vertex, the extension line is a straight line or a curve; the first width is equal to the second width, or the first width is not equal to the second width; wherein the protrusions have a first extension length (L1) along the axis on the first mounting surface, and the protrusions have a second extension length (L2) along the axis on the second mounting surface; wherein the lens device satisfies at least any one or a combination of the following conditions: 0.06mm≦L1≦0.3mm; 0.06mm≦L2≦0.3mm; L1 / L2>2.7; L2 / L1<0.

35.

8. The lens device as described in either claim 1 or claim 7, wherein the shapes of the first cross section and the second cross section may be triangular, trapezoidal, or other shapes.

9. The lens device according to claim 7, wherein the first setting surface is provided with N1 convex portions, and the second setting surface is provided with N2 convex portions; wherein the lens device satisfies at least any one or a combination of the following conditions: 580 < N1 < 860; 580 < N2 < 860; 1930 / mm < N1 / L1< 14400 / mm.

Images