Optical lens

Abstract

The present invention discloses an optical lens. It includes a shading sheet and a gasket in sequence along the optical axis from the first side to the second side. No other elements are arranged between the shading sheet and the gasket. The shading sheet and the gasket each include a first side surface facing the first side and a second side surface facing the second side. The second side surface of the shading sheet includes a first surface. The first side surface of the gasket includes a bearing surface and a connecting surface connected to each other, wherein the connecting surface has a protruding portion. The bearing surface of the gasket has a straight line in the radial direction and abuts against the first surface of the shading sheet, and the abutment between the bearing surface and the first surface falls on the first reference plane. The most protruding parts of the shading sheet and the protruding portion are located on the same side of the first reference plane. The optical lens can effectively improve the problem of affecting the inner diameter of the shading sheet due to the warping of the shading sheet.

Description

Technical Field

[0001] The present invention relates to the field of optical imaging, and in particular to an optical imaging lens. Background Art

[0002] In order to prevent stray light from entering the imaging surface and affecting the optical imaging quality, a light shielding sheet can be set between the lenses to block stray light. Because the optical boundaries of adjacent lenses in an optical lens may be too far apart, it is often necessary to set a gasket between the lens assembly parts so that the lenses can maintain an appropriate distance from each other. Therefore, it is a common method to sandwich a light shielding sheet and a gasket between the lenses during assembly. However, because the light shielding sheet is very thin and has a small inner diameter, it is easy to warp in the opposite direction of the lens support after being heated or stressed, thereby changing the inner diameter of the light shielding sheet, which affects the effect of the light shielding sheet in blocking stray light. Summary of the invention

[0003] The present invention provides an optical lens, which can effectively improve the problem that the inner diameter of a light shielding sheet is affected by the warping of the light shielding sheet.

[0004] One embodiment of the present invention provides an optical lens, which includes a shading sheet and a gasket in sequence along the optical axis from the first side to the second side. No other elements are provided between the shading sheet and the gasket. The shading sheet and the gasket each include a first side surface facing the first side and a second side surface facing the second side. The second side surface of the shading sheet includes a first surface. The first side surface of the gasket includes a bearing surface and a connecting surface connected to each other, wherein the connecting surface has a protruding portion. The bearing surface of the gasket has a straight line in the radial direction and abuts against the first surface of the shading sheet, and the abutment between the bearing surface and the first surface falls on the first reference plane. The most protruding parts of the shading sheet and the protruding portion are located on the same side of the first reference plane. Preferably, the first reference plane is perpendicular to the optical axis.

[0005] One embodiment of the present invention provides an optical lens, which includes a shading sheet and a gasket in sequence along the optical axis from the first side to the second side. No other elements are provided between the shading sheet and the gasket. The shading sheet and the gasket each include a first side surface facing the first side and a second side surface facing the second side. The second side surface of the shading sheet includes a first surface. The first side surface of the gasket includes a bearing surface and a connecting surface connected to each other, wherein the connecting surface has a protruding portion. The bearing surface of the gasket is a straight line in the radial direction and abuts against the first surface of the shading sheet. The optical lens satisfies the following conditional formula: L / D1≧1.020, wherein L is the minimum distance between the bearing surface and the optical axis, and D1 is the minimum distance between the most protruding part of the protruding portion and the optical axis.

[0006] Furthermore, the first side is the object side or the light exiting side, and the second side is the image side or the light incident side.

[0007] Furthermore, the first side is the image side or the light incident side, and the second side is the object side or the light exit side.

[0008] Furthermore, the maximum thickness of the shading sheet in the optical axis direction is smaller than the maximum thickness of the gasket in the optical axis direction.

[0009] Furthermore, the raised portion is connected to the bearing surface.

[0010] Furthermore, the shortest distance between the protrusion and the bearing surface is greater than 0.

[0011] Furthermore, the optical lens satisfies the following conditional formula: D2 / S≧20.000, wherein D2 is the distance between the inner edge of the gasket and the position of the shading plate closest to the optical axis in the direction perpendicular to the optical axis, the inner edge is the position of the gasket closest to the optical axis, and S is the distance between the most protruding part of the raised portion and the supporting surface in the direction of the optical axis.

[0012] Furthermore, the gasket has an inner circumference at a position closest to the optical axis, and the inner circumference is connected to the connecting surface.

[0013] Furthermore, a chamfer is provided between the protruding portion and the inner peripheral edge.

[0014] Further, the protrusion is in contact with the light shielding sheet.

[0015] Further, the raised portion is connected to the inner periphery.

[0016] Furthermore, the optical lens further includes a lens, which includes a first side surface facing the first side and a second side surface facing the second side, and the light shielding sheet is arranged between the lens and the gasket.

[0017] Furthermore, the second side of the light shielding sheet further includes a second surface connected to the first surface, and the first side of the light shielding sheet includes a third surface and a fourth surface connected to each other, wherein

[0018] A connection between the first surface and the second surface has an angle; and

[0019] The third surface of the light shielding sheet abuts against the second side surface of the lens, and the abutting point between the third surface and the second side surface of the lens falls on a second reference plane, and the connection point between the third surface and the fourth surface has an included angle.

[0020] Further, the second reference plane is perpendicular to the optical axis.

[0021] Furthermore, the raised portion of the gasket abuts against the second surface of the shading sheet.

[0022] Furthermore, the shortest distance between the second surface and the protrusion is greater than 0.

[0023] Furthermore, the fourth surface is located closest to the optical axis on a side of the second reference plane facing the first side, and a distance between the fourth surface and the lens in a normal direction thereof is greater than 0.

[0024] Based on the above, in the optical lens of the embodiment of the present invention, since the most protruding parts of the convex parts of the shading sheet and the gasket are located on the same side of the first reference plane, if the shading sheet is warped in the opposite direction of the lens due to force or heat during the assembly of the optical lens, the gasket can appropriately provide the shading sheet with a force in the direction of the lens to guide the shading sheet, thereby preventing excess stray light from entering the imaging surface and affecting the optical imaging quality due to the change in the inner diameter of the shading sheet. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of an optical lens according to a first embodiment of the present invention.

[0026] Figure 2 is a schematic diagram of an optical lens according to a second embodiment of the present invention.

[0027] Figure 3 is a schematic diagram of an optical lens according to a third embodiment of the present invention.

[0028] Figure 4 is a schematic diagram of an optical lens according to a fourth embodiment of the present invention.

[0029] Figure 5 is a schematic diagram of an optical lens according to a fifth embodiment of the present invention.

[0030] Figure 6 is a schematic diagram of an optical lens according to a sixth embodiment of the present invention. DETAILED DESCRIPTION

[0031] Before starting to describe the present invention in detail, the symbols in the accompanying drawings are first clearly indicated: 1: lens; 2, 2': shading plate; 3: gasket; 10, 10A, 10B, 10C, 10D, 10E: optical lens; 11, 21, 31: first side surface; 12, 22, 32: second side surface; 211: third surface; 212: fourth surface; 221: first surface; 222: second surface; 311: supporting surface; 312: connecting surface; A1: first side; A2: second side; B: inclined plane; D: radial direction; D1, D2, L, S: distance; I: optical axis; P: inner periphery; R1: first reference plane; R2: second reference plane; T1, T2: thickness; V, V': recessed portion; X: raised portion; α, β: chamfers; θ: included angle.

[0032] Figure 1 is a schematic diagram of an optical lens according to a first embodiment of the present invention. Figure 1An embodiment of the present invention provides an optical lens 10, which includes a light shielding sheet 2 and a gasket 3 in sequence from a first side A1 to a second side A2 along an optical axis I. In this embodiment, the first side A1 is an object side or a light emitting side, and the second side A2 is an image side or a light incident side. Figure 1 For example, when the optical lens 10 is an optical imaging lens, the first side A1 may be the object side, the second side A2 may be the image side, and the optical lens 10 is used to allow imaging light to pass through and form an image on the imaging surface located on the second side A2. When the optical lens 10 is a projection lens or a structured light optical lens, the first side A1 may be the light emitting side and the second side A2 may be the light incident side, so that light emitted by the light source located on the second side A2 generates a plurality of imaging light beams with different emission angles after passing through the optical lens 10, but it is not limited thereto, the first side A1 may also be the image side or the light incident side, and the second side A2 may also be the object side or the light emitting side.

[0033] In the present embodiment, the shading sheet 2 and the gasket 3 respectively include a first side surface 21, 31 facing the first side A1 and a second side surface 22, 32 facing the second side A2. The second side surface 22 of the shading sheet 2 includes a first surface 221, and the second side surface 22 also includes a second surface 222 connected to the first surface 221. The first side surface 21 of the shading sheet 2 includes a third surface 211 and a fourth surface 212 connected to each other. It is worth defining that facing the first side A1 means that the angle between the direction facing the surface and the direction of the first side A1 is less than 90 degrees, that is, facing the first side A1 and obliquely facing the first side A1 are both considered to be facing the first side A1, but facing away from the first side A1, obliquely facing away from the first side A1, and the direction facing the surface and the direction of the first side A1 are 90 degrees apart. These three situations cannot be interpreted as facing the first side A1. Similarly, toward the second side A2 means that the angle between the direction toward which the surface is facing and the direction toward the second side A2 is less than 90 degrees, that is, facing the second side A2 and obliquely toward the second side A2 are both considered to be toward the second side A2, but facing away from the second side A2, obliquely facing away from the second side A2, and the direction toward which the surface is facing and the direction toward the second side A2 are 90 degrees apart cannot be interpreted as toward the second side A2.

[0034] In this embodiment, the first side surface 31 of the gasket 3 includes a bearing surface 311 and a connecting surface 312 connected to each other, wherein the connecting surface 312 has a protrusion X. The gasket 3 has an inner periphery P at a position closest to the optical axis I. The inner periphery P is connected to the connecting surface 312. In other words, the inner periphery P is the surface of the gasket 3 at the junction of the first side surface 31 and the second side surface 32, that is, at the edge of a perforation in the center of the gasket 3.

[0035] In this embodiment, the optical lens 10 further includes a lens 1. The lens 1 includes a first side surface 11 facing the first side A1 and a second side surface 12 facing the second side A2. The light shielding sheet 2 is disposed between the lens 1 and the gasket 3. The lens 1 has an optically effective area surrounding the optical axis I and including the optical axis I and allowing imaging light to pass through, and an optically ineffective area surrounding the optical axis I but away from the optical axis I and allowing no imaging light to pass through. The optically ineffective area of ​​the lens 1 is connected to the optically effective area.

[0036] In this embodiment, the light shielding sheet 2 is disposed on the optically ineffective area corresponding to the lens 1 and is used to shield stray light. The gasket 3 is also disposed on the optically ineffective area corresponding to the lens 1 and is used to maintain the designed distance between the components of the optical lens 10.

[0037] In order to effectively shield stray light, in this embodiment, no other elements are provided between the light shielding sheet 2 and the gasket 3. The third surface 221 of the light shielding sheet 2 abuts against the second side surface 12 of the lens 1, and the bearing surface 311 of the gasket 3 abuts against the first surface 221 of the light shielding sheet 2.

[0038] In detail, the section line of the bearing surface 311 of the gasket 3 in the radial direction D is a straight line, and the abutment between the bearing surface 311 and the first surface 221 of the shading sheet 2 falls on the first reference plane R1. The connection between the first surface 221 and the second surface 222 has an angle θ, and the angle θ is less than 180 degrees. In other words, the second surface 222 is inclined relative to the first reference plane R1 near the connection with the first surface 221. Moreover, the second surface 222 is approximately parallel to the first reference plane R1 away from the connection between the first surface 311 and the second surface 312. In this embodiment, the most protruding part of the protrusion X is located on the same side of the first reference plane R1 as the shading sheet 2. In other words, the most protruding part of the protrusion X is closer to the first side A1 than the first reference plane R1.

[0039] In this embodiment, the junction of the third surface 211 of the light shielding sheet 2 and the second side surface 12 of the lens 1 falls on a second reference plane R2, and the junction of the third surface 211 and the fourth surface 212 has an angle θ. In other words, the fourth surface 212 is inclined relative to the second reference plane R2 near the junction with the third surface 211.

[0040] In this embodiment, the second side surface 12 of the lens 1 includes a concave portion V. Relative to the second reference plane R2, the concave portion V is concave on the second side surface 12. The concave portion V of the lens 1 accommodates a portion of the light shielding film 2 corresponding to the fourth surface 212.

[0041] In this embodiment, the fourth surface 212 of the light shielding sheet 2 is located closest to the optical axis I on the side of the second reference plane R2 facing the first side A1, and the distance between the fourth surface 212 and the lens 1 in the normal direction is greater than 0. In other words, the fourth surface 212 of the light shielding sheet 2 does not contact the second side surface 12 of the lens 1. Therefore, when the protrusion X of the connecting surface 312 of the gasket 3 provides a force for the light shielding sheet 2 to bear against the lens 1, the concave portion V of the lens 1 does not interfere with the light shielding sheet 2, thereby preventing the lens 1 from providing another force for the light shielding sheet 2 in the direction of the gasket 3, causing the light shielding sheet 2 to warp again.

[0042] In this embodiment, along the direction of the optical axis I, the distance between the position of the protrusion X of the gasket 3 corresponding to the fourth surface 212 of the light shielding sheet 2 and the second side surface 12 of the lens 1 is greater than 0, that is, the position of the fourth surface 212 does not contact the second side surface 12 of the lens. Therefore, when the protrusion X of the connecting surface 312 of the gasket 3 provides a force to the light shielding sheet 2 in the direction of supporting the lens 1, the lens 1 can reserve a space (i.e., the concave portion V) without interfering with the light shielding sheet 2, so as to prevent the lens 1 from providing another force to the light shielding sheet 2 in the direction of the gasket 3, causing the light shielding sheet 2 to warp again.

[0043] In this embodiment, the first reference plane R1 and the second reference plane R2 are perpendicular to the optical axis I.

[0044] In this embodiment, the shortest distance between the protrusion X of the gasket 3 and the bearing surface 311 is greater than 0, that is, the protrusion X is not directly connected to the bearing surface 311. The distance between the bearing surface 311 and the most protruding part of the protrusion X, which are mutually supporting points, is long, and the supporting force of the gasket 3 in preventing the light shielding sheet 2 from deforming is relatively large, so the inner diameter of the light shielding sheet 2 is not easily changed. The protrusion X of the gasket 3 is in contact with the light shielding sheet 2, and the protrusion X abuts against the second surface 222 of the light shielding sheet 2. Since the protrusion X of the gasket 3 is in contact with the light shielding sheet 2, the light shielding sheet 2 directly bears a force in the direction of bearing against the lens 1, so that the warping degree caused by the force or heat of the light shielding sheet 2 during assembly can be further reduced, thereby further improving the assembly yield.

[0045] In this embodiment, the maximum thickness T1 of the light shielding sheet 2 in the direction of the optical axis I is smaller than the maximum thickness T2 of the gasket 3 in the direction of the optical axis I, so as to achieve the best effect of shielding stray light and spacing the lens distance.

[0046] Based on the above, in one embodiment of the present invention, the optical lens 10 is provided with a shading sheet 2 and a gasket 3, and the most protruding parts of the protrusions X of the shading sheet 2 and the gasket 3 are located on the same side of the first reference plane R1. Therefore, during the assembly process of the optical lens 10, if the shading sheet 2 is warped in the opposite direction of the support of the lens 1 (that is, in the direction of the second side A2) due to force or heat, the gasket 3 can appropriately provide the shading sheet 2 with a force in the direction of supporting the lens 1, so as to prevent the shading sheet 2 from warping and causing the inner diameter to change, thereby allowing excess stray light to enter the imaging surface and affect the optical imaging quality. In other words, since the optical lens 10 meets the above design, the gasket 3 can be used as an obstacle in advance in the other direction of the shading sheet 1 supporting the lens 1, so that when the shading sheet 2 is deformed by force or heat, it can be properly guided back to the direction of supporting the lens 1 without affecting the imaging quality.

[0047] In addition, in one embodiment of the present invention, the optical lens 10 is provided with a light shielding sheet 2 and a gasket 3, and the optical lens 10 satisfies the following conditional formula: L / D1≧1.020, wherein L is the minimum distance between the bearing surface 311 and the optical axis I, and D1 is the minimum distance between the most protruding part of the protrusion X and the optical axis I, and the preferred range is 1.020≦L / D1≦1.500. Therefore, in addition to being able to act as an obstacle in advance in the opposite direction of the light shielding sheet 2 bearing against the lens, so that the light shielding sheet 2 can be properly guided back to the direction of bearing against the lens 1 when it is deformed by force or heat without affecting the imaging quality, the gasket 3 controls the minimum distance D1 between the most protruding part of the protrusion X and the optical axis I to more accurately guide the light shielding sheet 2. In other words, too large or too small a distance D1 may cause the gasket 3 to be unable to provide the correct torque, so that the light shielding sheet 1 cannot be guided to the designed position.

[0048] Furthermore, in this embodiment, the optical lens 10 satisfies the following conditional formula: D2 / S≧20.000, where D2 is the distance between the inner periphery P of the gasket 3 and the position of the light shielding sheet 2 closest to the optical axis I in the direction perpendicular to the optical axis I, and S is the distance between the most protruding part of the protrusion X and the supporting surface 311 in the direction of the optical axis I, and the preferred range is 20.000≦D2 / S≦300.000. When the optical lens 10 satisfies the above conditions, the protrusion X of the connecting surface 312 of the gasket 3 can provide sufficient force in the direction of supporting the lens 1 to smoothly correct the warping of the light shielding sheet 2.

[0049] Figure 2 is a schematic diagram of an optical lens according to a second embodiment of the present invention. Figure 2 , Figure 2 The optical lens 10A and Figure 1The optical lens 10A of an embodiment of the present invention is similar to the optical lens 10, and the main difference is that: in the present embodiment, the first side A1 is an image side or a light incident side, and the second side A2 is an object side or a light exit side, but it is not limited thereto, the first side A1 can also be an object side or a light exit side, and the second side A2 can also be an image side or a light incident side. The raised portion X of the gasket 3 is connected to the bearing surface 311. In other words, the raised portion X is located at the maximum distance between the connecting surface 312 and the inner periphery P. The optical lens 10A of an embodiment of the present invention can have an effect similar to that of the optical lens 10, which will not be repeated here.

[0050] Figure 3 is a schematic diagram of an optical lens according to a third embodiment of the present invention. Figure 3 , Figure 3 The optical lens 10B and Figure 1 The optical lens 10B of the present invention is similar to the optical lens 10 of the present invention, and the main difference is that the protrusion X of the gasket 3 is connected to the bearing surface 311. In other words, the protrusion X is located at the maximum distance between the connecting surface 312 and the inner periphery P, and there is a chamfering α between the protrusion X and the inner periphery P, which makes processing and molding easier. The other effects of the optical lens 10B of the present invention are similar to those of the optical lens 10, which will not be repeated here.

[0051] Figure 4 is a schematic diagram of an optical lens according to a fourth embodiment of the present invention. Figure 4 , Figure 4 Optical lens 10C and Figure 1 The optical lens 10C is similar to the optical lens 10 of the present invention, and the main difference is that the protrusion X of the gasket 3 is connected to the inner periphery P, so the overall volume of the gasket 3 is small, making the cost of the optical lens 10C lower. The other effects of the optical lens 10C of an embodiment of the present invention are similar to those of the optical lens 10, which will not be repeated here.

[0052] Figure 5 is a schematic diagram of an optical lens according to a fifth embodiment of the present invention. Figure 5 , Figure 5 The optical lens 10D and Figure 1The optical lens 10D of the present invention is similar to the optical lens 10 of the present invention, and the main difference is that: in this embodiment, the shortest distance between the second surface of the light shielding sheet 2' and the raised portion of the gasket 3 is greater than 0, that is, the raised portion X of the gasket 3 does not contact the light shielding sheet 2, and is preliminarily used as an obstacle in the opposite direction of the light shielding sheet 2' supporting the lens 1, so that the light shielding sheet 2' can be properly guided back to the direction of supporting the lens 1 when it is deformed by force or heat. In addition, in addition to the angle θ at the connection between the first surface 311 and the second surface 312, the portion of the second surface 312 away from the connection still has an angle θ with the first surface 311, so that the light shielding sheet 2' is >-shaped to achieve the effect of accurately shielding stray light. The other effects that the optical lens 10D of an embodiment of the present invention may have are similar to those of the optical lens 10, which will not be repeated here.

[0053] Figure 6 is a schematic diagram of an optical lens according to a sixth embodiment of the present invention. Figure 6 , Figure 6 Optical lens 10E and Figure 1 The optical lens 10E of the present invention is similar to the optical lens 10 of the present invention, and the main difference is that: in this embodiment, the connection surface 312 of the gasket 3 further includes a recessed portion V' and a sloped surface B between the protruding portion X and the bearing surface 311. Relative to the first reference plane R1, the recessed portion V' is concave on the first side surface 31. Furthermore, the sloped surface B is connected to the recessed portion V' and the bearing surface 311 respectively, and the sloped surface B and the bearing surface 311 are chamfered at an angle β, and there is also a chamfered angle α between the protruding portion X and the inner periphery P, so that processing and molding are easier. The other effects that the optical lens 10E of an embodiment of the present invention may have are similar to those of the optical lens 10, and will not be repeated here.

[0054] In summary, the optical lens of the embodiment of the present invention can achieve the following effects and advantages:

[0055] 1. The optical lens is provided with a light shielding sheet and a gasket, and no other elements are provided between the light shielding sheet and the gasket. The first side surface of the gasket includes a bearing surface and a connecting surface connected to each other, wherein the connecting surface has a raised portion, and the radial section of the bearing surface of the gasket is a straight line and abuts against the first surface of the light shielding sheet, and the abutment between the bearing surface and the first surface falls on a first reference plane. The most protruding part of the raised portion of the gasket is located on the same side of the first reference plane as the light shielding sheet, so that during the assembly process of the optical lens, if the light shielding sheet is warped in the opposite direction of the lens due to force or heat, the gasket can appropriately provide a force for the light shielding sheet to bear against the lens, thereby preventing the warping of the light shielding sheet from causing the inner diameter to change and allowing excess stray light to enter the imaging surface and affect the optical imaging quality.

[0056] 2. The optical lens is provided with a shading sheet and a gasket, and no other elements are provided between the shading sheet and the gasket, the first side surface of the gasket includes a bearing surface and a connecting surface connected to each other, wherein the connecting surface has a protrusion, the radial section of the bearing surface of the gasket is a straight line and abuts against the first surface of the shading sheet, and the optical lens satisfies the following conditional formula: L / D1≧1.020, in addition to being able to act as an obstacle in advance in the opposite direction of the shading sheet supporting the lens, so that the shading sheet can be properly guided back to the direction of supporting the lens when it is deformed by force or heat without affecting the imaging quality, controlling the minimum distance D1 of the protrusion relative to the optical axis can more accurately guide the shading sheet.

[0057] Although the present invention has been disclosed as above by way of embodiments, it is not intended to limit the present invention. Any person having ordinary knowledge in the technical field may make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the scope of the attached patent application.

Claims

1. An optical lens, comprising a lens, a light shielding sheet and a gasket in sequence from a first side to a second side along an optical axis, wherein no other elements are arranged between the light shielding sheet and the gasket, wherein the light shielding sheet, the gasket and the lens each comprise a first side surface facing the first side and a second side surface facing the second side, wherein The second side surface of the light shielding sheet includes a first surface and a second surface connected to the first surface; The first side surface of the light shielding sheet includes a third surface and a fourth surface connected to each other, and a contact point between the third surface and the second side surface of the lens falls on a second reference plane; and The first side surface of the gasket includes a bearing surface and a connecting surface connected to each other, wherein the connecting surface has a protruding portion; the most protruding portion of the protruding portion is closer to the optical axis than the bearing surface in a direction perpendicular to the optical axis; The section line of the bearing surface of the gasket in a radial direction is a straight line and abuts against the first surface of the light shielding sheet, and the abutment point between the bearing surface and the first surface falls on a first reference plane; The most protruding parts of the light shielding sheet and the protruding portion are located on the same side of the first reference plane; and The fourth surface is located closest to the optical axis on a side of the second reference plane facing the first side, and a distance between the fourth surface and the lens in a normal direction thereof is greater than 0.

2. The optical lens as claimed in claim 1, wherein the first reference plane is perpendicular to the optical axis.

3. The optical lens as claimed in claim 1, wherein the optical lens satisfies the following conditional expression: L / D1≧1.020, wherein L is the minimum distance between the bearing surface and the optical axis, and D1 is the minimum distance between the most protruding part of the protrusion and the optical axis. 4 . The optical lens as claimed in claim 1 , wherein the first side is an object side or a light exit side, and the second side is an image side or a light entrance side. 5 . The optical lens as claimed in claim 1 , wherein the first side is an image side or a light incident side, and the second side is an object side or a light exit side.

6. The optical lens as claimed in claim 1, wherein the maximum thickness of the light shielding sheet in the direction of the optical axis is smaller than the maximum thickness of the gasket in the direction of the optical axis.

7. The optical lens as claimed in claim 1, wherein the protrusion is connected to the bearing surface. 8 . The optical lens as claimed in claim 1 , wherein the shortest distance between the protrusion and the bearing surface is greater than 0.

9. An optical lens as claimed in claim 1, wherein the optical lens satisfies the following conditional expression: D2 / S≧20.000, wherein D2 is the distance between an inner periphery of the gasket and the position of the shading plate closest to the optical axis in a direction perpendicular to the optical axis, the inner periphery is the position of the gasket closest to the optical axis, and S is the distance between the most protruding part of the protrusion and the bearing surface in the direction of the optical axis.

10. The optical lens as claimed in claim 1, wherein the gasket has an inner periphery at a position closest to the optical axis, and the inner periphery is connected to the connecting surface. The optical lens as claimed in claim 10 , wherein a chamfer is formed between the protruding portion and the inner peripheral edge.

12. The optical lens as claimed in claim 1, wherein the protrusion is in contact with the light shielding sheet.

13. The optical lens as claimed in claim 1, wherein the gasket has an inner peripheral edge at a position closest to the optical axis, and the protrusion is connected to the inner peripheral edge.

14. The optical lens as claimed in claim 1, wherein a connection between the first surface and the second surface has an angle; and The third surface of the light shielding sheet abuts against the second side surface of the lens, and a connection between the third surface and the fourth surface has the included angle.

15. The optical lens as claimed in claim 1, wherein the second reference plane is perpendicular to the optical axis.

16. The optical lens as claimed in claim 1, wherein the protrusion of the gasket abuts against the second surface of the light shielding film. 17 . The optical lens as claimed in claim 1 , wherein the shortest distance between the second surface and the protrusion is greater than 0.

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