Light path adjusting mechanism and optical device

Abstract

The invention is suitable for the technical field of optical equipment, and provides a light path adjusting mechanism and an optical device, and the light path adjusting mechanism comprises a pedestal, a support, an adjusting assembly, a supporting member, and a reflector. The support is provided with a first side and a second side which are arranged at intervals in the first direction. The first side of the support is connected with the base through an adjusting assembly. The supporting piece is installed on the second side of the support, one end of the supporting piece is a ball head end, and the second side of the support is supported on the base through the ball head end. The reflector is installed on the support, and the adjusting assembly is used for enabling the support to move relative to the base with the ball head end as the fulcrum, so that the fulcrum of the support in the moving process relative to the base is fixed, the moving angle and the moving direction of the support can be conveniently confirmed, and the inclination angle of the reflector can be conveniently and rapidly adjusted to the target inclination angle. And the adjusting mode is simpler and more convenient.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical equipment, more particularly, to an optical path adjusting mechanism and an optical device. BACKGROUND

[0002] In an optical system, an optical path adjusting mechanism is an important component for ensuring the imaging quality of the optical system. A common optical path adjusting mechanism mainly includes a base and a support on which a mirror is mounted. Four corners of the support are connected to the base by screws. By screwing the screws, the support can move relative to the base to adjust the tilt angle of the mirror. However, in this kind of optical path adjusting mechanism, the pivot point of the support relative to the base changes dynamically when different screws are screwed, and it is difficult to determine the moving angle and direction of the support. During the adjustment process, different screws need to be repeatedly adjusted, and the adjustment method is relatively complicated. SUMMARY

[0003] The purpose of the embodiments of the present application is to provide an optical path adjusting mechanism and an optical device, aiming to solve the technical problem that the process of adjusting the tilt angle of the mirror in the prior art is relatively complicated.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present application is as follows:

[0005] In a first aspect, the present application provides an optical path adjusting mechanism, comprising a base, a support, an adjusting assembly, a supporting piece and a mirror, wherein:

[0006] The support has a first side and a second side which are spaced apart along a first direction. The first side of the support is connected to the base by the adjusting assembly.

[0007] The supporting piece is installed on the second side of the support. One end of the supporting piece is provided as a ball head end. The second side of the support is supported on the base by the ball head end.

[0008] The mirror is installed on the support.

[0009] The adjusting assembly is used to make the support move relative to the base with the ball head end as the pivot point, so as to adjust the tilt angle of the mirror.

[0010] In a possible design, the base is provided with a first light passing hole on one side in a second direction and a second light passing hole on one side in a third direction. The second direction and the third direction are perpendicular to each other. The supporting piece is threadedly connected to the support. When the supporting piece is screwed, the support can be driven to move relative to the base along the second direction.

[0011] In a possible design, the base is provided with a matching groove, the matching groove has a groove edge surrounding an opening, and part of the ball head end extends into the matching groove and is in contact with the groove edge.

[0012] In a possible design, the groove edge surrounds a circular opening; and / or,

[0013] The groove edge is provided with a chamfer or a fillet.

[0014] In a possible design, the optical path adjusting mechanism further comprises an elastic limiting structure, the elastic limiting structure is mounted to the base; the base has a supporting surface, the ball head end is supported on the supporting surface, a limiting space is formed between the elastic limiting structure and the supporting surface, at least part of the second side of the support extends into the limiting space, and the elastic limiting structure exerts a force on the second side of the support to make the second side of the support close to the supporting surface.

[0015] In a possible design, the elastic limiting structure has an elastic deformation capability; or,

[0016] The elastic limiting structure comprises a movable element and an elastic connecting element, the elastic connecting element is connected to the base and the movable element respectively, and the limiting space is formed between the movable element and the supporting surface.

[0017] In a possible design, the second side of the support is provided with a limiting block, the limiting block extends into the limiting space, and the elastic limiting structure exerts a force on the limiting block to make the limiting block close to the supporting surface.

[0018] In a possible design, an edge of a side of the limiting block facing the elastic limiting structure is provided with a fillet.

[0019] In a possible design, the adjusting assembly comprises:

[0020] A plurality of adjusting screws, the first side of the support is provided with a plurality of through holes at intervals in a fourth direction, the fourth direction is arranged at an angle to the first direction, a plurality of the through holes are arranged one-to-one with a plurality of the adjusting screws, and each adjusting screw is screwed to the base through a corresponding through hole;

[0021] An elastic element arranged between the first side of the support and the base, the elastic element has a tendency to drive the first side of the support and the base to move away from each other.

[0022] In a second aspect, the application further provides an optical device comprising the optical path adjusting mechanism provided in any of the technical solutions.

[0023] The optical path adjusting mechanism provided by the application has the beneficial effects that, compared with the prior art, the first side of the support is connected with the base through the adjusting assembly, the second side is supported on the base through the ball head end of the supporting piece, the outer surface of the ball head end is a spherical cap surface, the support is supported on the base through the ball head end, when the first side of the support is driven to move relative to the base through the adjusting assembly, the support can always move relative to the base along any direction with the ball head end as the fulcrum, so that the fulcrum during the movement of the support relative to the base is fixed, the movement angle and the movement direction of the support are easy to confirm, and the inclination angle of the reflecting mirror is easy to quickly adjust to the target inclination angle, and the adjusting mode is more convenient.

[0024] The optical device provided by the application has the beneficial effects that, compared with the prior art, since the optical device provided by the application comprises the optical path adjusting mechanism provided in any of the technical solutions, the optical device provided by the application at least has all the beneficial effects described above, and details are not repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative effort.

[0026] Figure 1 is a schematic diagram of the overall structure of the optical path adjusting mechanism provided by an embodiment of the application;

[0027] Figure 2 is an exploded schematic diagram of the optical path adjusting mechanism provided by an embodiment of the application;

[0028] Figure 3 is a schematic diagram of the cross section of the optical path adjusting mechanism provided by an embodiment of the application;

[0029] Figure 4 is a schematic diagram of the structure of the base and the adjusting assembly in the optical path adjusting mechanism provided by an embodiment of the application;

[0030] Figure 5 is a schematic diagram of the structure of the supporting piece in the optical path adjusting mechanism provided by an embodiment of the application;

[0031] Figure 6 is Figure 3 is a local enlarged schematic diagram of position A in FIG.

[0032] The label details involved in the above drawings are as follows:

[0033] 100, base; 110, first plate body; 111, first light passing hole; 120, second plate body; 121, second light passing hole; 130, matching groove; 131, groove edge;

[0034] 200, bracket; 210, first side; 220, second side; 221, limiting block; 222, threaded hole;

[0035] 300, adjusting assembly; 310, adjusting screw; 320, elastic piece;

[0036] 400, support; 410, cylinder; 411, groove; 420, ball head end;

[0037] 500, reflecting mirror;

[0038] 610, first optical lens; 620, second optical lens;

[0039] 700, elastic limiting structure; 710, limiting space; 720, avoiding hole. DETAILED DESCRIPTION

[0040] In order to make the technical problems to be solved by the present application, the technical solutions and beneficial effects clearer, the present application will be further described in detail below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not intended to limit the present application.

[0041] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0042] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the indicated structure or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0043] In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0044] In an optical system, an optical path adjusting mechanism is an important component for ensuring the imaging quality of the optical system. A conventional optical path adjusting mechanism mainly controls the machining precision of a single optical element and the assembly precision between multiple optical elements to make the optical path meet the requirements. However, the higher the precision requirement of the optical element is, the higher the manufacturing cost is, and it is difficult to meet the precision requirement in batch production. In addition, when multiple optical elements are assembled, there is a tolerance accumulation effect, so that the overall precision of the optical path adjusting mechanism is difficult to control, and it is difficult to meet the assembly requirements.

[0045] In the related art, some optical path adjusting mechanisms mainly include a base and a support on which a mirror is installed, four corners of the support are connected to the base through screws, and the support is movable relative to the base by screwing the screws to adjust the inclination angle of the mirror so that the optical path meets the requirements. However, in this kind of optical path adjusting mechanism, the fulcrum of the support relative to the base is dynamically changed when different screws are screwed, and it is difficult to determine the movement angle of the support. In the adjustment process, different screws need to be repeatedly adjusted, and the adjustment method is relatively cumbersome.

[0046] To solve the technical problems in the related art described above, the present application provides an optical path adjusting mechanism and an optical device. In order to describe the technical solutions described in the present application, the following will be described in detail in combination with specific drawings and embodiments.

[0047] First embodiment

[0048] As shown in Figure 1 and Figure 2 , the present embodiment provides an optical path adjusting mechanism, which includes a base 100, a support 200, an adjusting assembly 300, a support member 400, and a mirror 500. The support 200 has a first side 210 and a second side 220 which are spaced apart along a first direction (B-B), and the first side 210 of the support 200 is connected to the base 100 through the adjusting assembly 300. The support member 400 is installed on the second side 220 of the support 200, one end of the support member 400 is provided as a ball head end 420, and the second side 220 of the support 200 is supported on the base 100 through the ball head end 420. The mirror 500 is installed on the support 200, and the adjusting assembly 300 is used to make the support 200 move relative to the base 100 with the ball head end 420 as the fulcrum to adjust the inclination angle of the mirror 500.

[0049] In the light path adjusting mechanism of the embodiment, the first side 210 of the support 200 is connected to the base 100 through the adjusting assembly 300, and the second side 220 is supported on the base 100 through the mounting support 400 and the ball head end 420 of the mounting support 400. The outer surface of the ball head end 420 is a spherical cap surface. When the first side 210 of the support 200 is moved relative to the base 100 through the adjusting assembly 300, the support 200 can be moved in any direction relative to the base 100 with the ball head end 420 as the fulcrum. In this way, the fulcrum of the support 200 is fixed during movement relative to the base 100, which facilitates confirmation of the movement angle and direction of the support 200, and thus facilitates quick adjustment of the tilt angle of the mirror 500 to the target tilt angle, and the adjustment is more convenient.

[0050] In addition, the light path adjusting mechanism provided in the embodiment can adjust the tilt angle of the mirror 500, so that the light path can meet the requirements after the light path adjusting mechanism is assembled. In this way, the production precision and assembly precision of each component of the light path adjusting mechanism are reduced, which is beneficial to reducing the production cost.

[0051] In a possible design, as shown in Figure 3 and Figure 4 The base 100 is provided with the first light transmission hole 111 on one side in the second direction (C-C) and the second light transmission hole 121 on one side in the third direction (D-D), and the second direction (C-C) and the third direction (D-D) are perpendicular.

[0052] In some embodiments, the base 100 includes a first plate body 110 and a second plate body 120. The first plate body 110 and the second plate body 120 are arranged at an angle and connected to each other. An installation area is formed between the first plate body 110 and the second plate body 120, and the support 200 is located in the installation area. The first side 210 of the support 200 is mounted on the second plate body 120 through the adjusting assembly 300, and the second side 220 of the support 200 is supported on the first plate body 110 through the ball head end 420 of the mounting support 400. The first plate body 110 is arranged perpendicular to the second direction (C-C) and provided with the first light transmission hole 111 penetrating along the second direction (C-C), and the second plate body 120 is arranged perpendicular to the third direction (D-D) and provided with the second light transmission hole 121 penetrating along the third direction (D-D).

[0053] In the embodiments of the present application, one of the first light transmission hole 111 and the second light transmission hole 121 is an entrance light hole, and the other is an exit light hole. The light beam can be emitted onto the mirror 500 through the entrance light hole, and the light beam is reflected by the mirror 500 and emitted from the exit light hole.

[0054] The support 400 is threadedly connected with the bracket 200, and the support 400 is configured to drive the bracket 200 to move relative to the base 100 along the second direction (C-C) when the support 400 is screwed. In this way, the distance between the mirror 500 and the first light hole 111 and the second light hole 121 can be adjusted by screwing the support 400 to drive the bracket 200 and the mirror 500 to move along the second direction (C-C). As can be seen, the optical path adjusting mechanism provided in the embodiment can simultaneously adjust the eccentricity of the reflected light path and the optical path by only screwing the support 400, and the operation is very simple. It should be noted that the reflected light path refers to the moving path of the light beam after being reflected by the mirror 500; the eccentricity of the reflected light path refers to the distance between the reflected light path and the center of the light hole in the plane perpendicular to the axis of the light hole; and the optical path refers to the distance traveled by the light beam from the light inlet hole to the mirror 500 and then reflected by the mirror 500 to the light outlet hole.

[0055] In some embodiments, the first optical lens 610 is arranged on the side of the first light hole 111 away from the mirror 500. The first optical lens 610 is arranged opposite the first light hole 111 along the second direction (C-C), that is, the line connecting the center of the first optical lens 610 and the center of the first light hole 111 is parallel to the second direction (C-C). The second optical lens 620 is arranged on the side of the second light hole 121 away from the mirror 500. The second optical lens 620 is arranged opposite the second light hole 121 along the third direction (D-D), that is, the line connecting the center of the second optical lens 620 and the center of the second light hole 121 is parallel to the third direction (D-D). Generally, the smaller the distance between the reflected light path and the center of the light hole in the plane perpendicular to the axis of the light hole, the clearer the image.

[0056] It should be noted that the reflecting surface of the mirror 500 is arranged to be inclined to the second direction (C-C) and the third direction (D-D), respectively. The inclination angle of the mirror 500 is adjusted by the adjusting assembly 300, that is, the angle between the reflecting surface of the mirror 500 and the second direction (C-C) and the third direction (D-D), respectively. Preferably, the reflecting surface of the mirror 500 is arranged to be inclined to the second direction (C-C) and the third direction (D-D) at an angle of 45 degrees.

[0057] In a specific embodiment, as shown in Figure 5 The support 400 includes a cylindrical body 410 and a ball head 420, and the axis of the cylindrical body 410 is arranged to be parallel to the second direction (C-C), as shown in Figure 3 and Figure 6As shown, the ball head end 420 is connected to the cylinder 410 at a side close to the first light hole 111. In this embodiment, the second side 220 of the support 200 is provided with a threaded hole 222 along the second direction (C-C), and the end of the cylinder 410 away from the ball head end 420 is screwed with the threaded hole 222 on the second side 220 of the support 200. In addition, a groove 411 is formed on the side of the cylinder 410 away from the ball head end 420, and an external tool (e.g., a screwdriver) can be inserted into the groove 411 from the side of the threaded hole 222 away from the first light hole 111, and the support 400 is rotated by the external tool.

[0058] In a possible design, as shown in Figure 4 and Figure 6 As shown, the base 100 is provided with a matching groove 130 having a groove edge 131 surrounding the opening of the groove 130, and part of the structure of the ball head end 420 extends into the matching groove 130 and contacts the groove edge 131. In this embodiment, when part of the structure of the ball head end 420 extends into the matching groove 130, the groove edge 131 of the matching groove 130 surrounds the outer periphery of the ball head end 420, which is conducive to increasing the contact area between the ball head end 420 and the base 100 and improving the stability of the ball head end 420 supported on the base 100. In addition, the groove edge 131 can limit the ball head end 420 to rotate within the opening of the matching groove 130, so that the fulcrum of the support 200 relative to the base 100 during movement can be more accurately positioned.

[0059] In some embodiments, the matching groove 130 can be a circular groove, a square groove, or any other groove structure. For example, when the matching groove 130 is a square groove, the opening of the matching groove 130 is a square opening, and the square opening has four groove edges 131, each of which contacts the ball head end 420, so that there are four support points between the ball head end 420 and the base 100, and the four support points surround the outer periphery of the ball head end 420, which is conducive to improving the uniformity of the stress of the ball head end 420 and further improving the stability of the ball head end 420 supported on the base 100.

[0060] In a possible design, the groove edge 131 surrounds a circular opening. The circular opening is shaped to match the ball head end 420, so that the groove edge 131 can completely contact the ball head end 420, further increasing the contact area between the ball head end 420 and the base 100, and further improving the stability of the ball head end 420 supported on the base 100.

[0061] In a possible design, the groove edge 131 is provided with a chamfer or a rounded corner, which is conducive to reducing the stress concentration of the groove edge 131, reducing the wear between the groove edge 131 and the ball head end 420, and improving the smoothness of the rotation of the ball head end 420 relative to the base 100.

[0062] In a possible design, as shown in Figure 1 and Figure 6 , the light path adjusting mechanism further comprises an elastic limiting structure 700, which is mounted on the base 100. The base 100 has a support surface, the ball head end 420 is supported on the support surface, the elastic limiting structure 700 and the support surface form a limiting space 710 therebetween, at least part of the second side 220 of the support frame 200 extends into the limiting space 710, and the elastic limiting structure 700 exerts a force on the support frame 200 to make the support frame 200 close to the support surface. In this way, the stability of the ball head end 420 supported on the support surface is improved. In addition, when the support member 400 is twisted to drive the support frame 200 to move in the second direction (C-C), the support member 400 on the second side 220 of the support frame 200 can be pressed on the support surface by the elastic limiting structure 700, so as to improve the stability of the ball head end 420 supported on the support surface.

[0063] In this embodiment, the support surface is specifically arranged on the side of the first plate body 110 facing the support frame 200, and the cooperation groove 130 is specifically arranged on the support surface. In some embodiments, the threaded hole 222 on the second side 220 of the support frame 200 is specifically arranged to penetrate the limiting block 221. Optionally, the region of the elastic limiting structure 700 opposite to the limiting block 221 is arranged to penetrate the avoiding hole 720, which is used to avoid the support member 400. Specifically, the end of the cylinder 410 of the support member 400 away from the ball head end 420 can extend into the avoiding hole 720.

[0064] In a possible design, the elastic limiting structure 700 has an elastic deformation capability. Specifically, the elastic limiting structure 700 is made of an elastic material, such as rubber material, plastic material or other elastic material.

[0065] In another possible design, the elastic limiting structure 700 comprises a movable member and an elastic connecting member, the elastic connecting member connects the base 100 and the movable member respectively, and the limiting space 710 is formed between the movable member and the support surface. Optionally, the elastic connecting member can be a spring, a rubber member or other elastic structure. The movable member is elastically connected to the base 100 through the elastic connecting member. In this embodiment, the elastic connecting member has a tendency to drive the movable member to move close to the support surface, so that the movable member can exert a force on the support frame 200 to make the support frame 200 close to the support surface, thereby improving the stability of the support member 400 supported on the support surface.

[0066] In a possible design, as shown in Figure 2 and Figure 6As shown, the second side 220 of the bracket 200 is provided with a limiting block 221, the limiting block 221 extends into the limiting space 710, and the elastic limiting structure 700 exerts a force on the limiting block 221 to make the limiting block 221 close to the supporting surface. Optionally, the edge of the side of the limiting block 221 facing the elastic limiting structure 700 is provided with a rounded corner. By providing the rounded corner, when the bracket 200 moves relative to the base 100, the limiting block 221 also moves relative to the base 100, and in the process, the limiting block 221 also moves relative to the elastic limiting structure 700. By providing the rounded corner, the edge of the side of the limiting block 221 facing the elastic limiting structure 700 is relatively smooth, which is beneficial to improve the smoothness when the limiting block 221 moves relative to the elastic limiting structure 700.

[0067] In a possible design, the adjusting assembly 300 includes the elastic member 320 and a plurality of adjusting screws 310. The first side 210 of the bracket 200 is provided with a plurality of through holes along a fourth direction (E-E) at an angle to the first direction (B-B), and the plurality of through holes are provided in one-to-one correspondence with the plurality of adjusting screws 310, and each adjusting screw 310 is threadedly connected to the base 100 through the corresponding through hole. The elastic member 320 is arranged between the first side 210 of the bracket 200 and the base 100, and the elastic member 320 has a tendency to drive the first side 210 of the bracket 200 and the base 100 away from each other. Optionally, the elastic member 320 can be a spring, a rubber member or other elastic structure.

[0068] According to the above technical solution, by screwing the adjusting screw 310, the distance between the first side 210 of the bracket 200 and the base 100 can be adjusted, so that the bracket 200 moves relative to the base 100 with the ball end 420 as the fulcrum, and then the inclination angle of the mirror 500 on the bracket 200 is adjusted.

[0069] Optionally, the fourth direction (E-E) can be arranged at a plurality of different angles to the first direction (B-B). For example, the fourth direction (E-E) can be arranged perpendicular to the first direction (B-B). In addition, in the embodiments of the present application, the fourth direction (E-E) is also arranged perpendicular to the second direction (C-C) and the third direction (D-D), respectively.

[0070] In some embodiments, the number of elastic members 320 can also be a plurality, and the plurality of elastic members 320 are arranged at intervals along the fourth direction (E-E). Optionally, the plurality of elastic members 320 are arranged in one-to-one correspondence with the plurality of adjusting screws 310. Optionally, each elastic member 320 surrounds the outer periphery of the corresponding adjusting screw 310, or each elastic member 320 is arranged beside the corresponding adjusting screw 310 and abuts against the base 100 and the first side 210 of the bracket 200, respectively.

[0071] Second Embodiment

[0072] The embodiment provides an optical device comprising the light path adjusting mechanism provided in any of the above embodiments. Since the optical device provided in the embodiment comprises the light path adjusting mechanism provided in any of the above embodiments, the optical device provided in the embodiment at least has all the beneficial effects of the above embodiments, which will not be repeated here.

[0073] Optionally, the optical device can be an optical mechanism such as a camera, an optical instrument, an optical-mechanical module, and the like, without being limited thereto.

[0074] The above only provides optional embodiments of the present application and does not limit the present application. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An optical path adjusting mechanism characterized by comprising: The light path adjusting mechanism comprises a base, a support, an adjusting assembly, a support piece and a mirror, wherein: the support has a first side and a second side spaced apart along a first direction, the first side of the support is connected with the base through the adjusting assembly; the support piece is installed on the second side of the support, one end of the support piece is provided as a ball head end, and the second side of the support is supported on the base through the ball head end; the mirror is installed on the support; the adjusting assembly is used to make the support move relative to the base with the ball head end as a fulcrum to adjust the inclination angle of the mirror.

2. The optical path adjusting mechanism according to claim 1, wherein one side of the base in a second direction is provided with a first light passing hole, one side of the base in a third direction is provided with a second light passing hole, the second direction is perpendicular to the third direction; the support piece is threadedly connected with the support, and the support piece is configured to be driven to move the support relative to the base along the second direction when the support piece is screwed.

3. The optical path adjusting mechanism according to claim 1, wherein the base is provided with a matching groove, the matching groove has a groove edge surrounding an opening thereof, and part of the structure of the ball head end extends into the matching groove and contacts the groove edge.

4. The optical path adjusting mechanism according to claim 3, wherein the groove edge surrounds to form a circular opening; and / or the groove edge is provided with a chamfer or a rounded corner.

5. The optical path adjusting mechanism according to claim 1, wherein the light path adjusting mechanism further comprises an elastic limiting structure, the elastic limiting structure is installed on the base; the base has a support surface, the ball head end is supported on the support surface, a limiting space is formed between the elastic limiting structure and the support surface, at least part of the structure of the second side of the support extends into the limiting space, and the elastic limiting structure exerts a force on the support to make the support close to the support surface.

6. The optical path adjusting mechanism according to claim 5, wherein the elastic limiting structure has an elastic deformation capability; or the elastic limiting structure comprises a movable piece and an elastic connecting piece, the elastic connecting piece is connected with the base and the movable piece respectively, and the limiting space is formed between the movable piece and the support surface.

7. The optical path adjusting mechanism according to claim 5, wherein the second side of the support is provided with a limiting block, the limiting block extends into the limiting space, and the elastic limiting structure exerts a force on the limiting block to make the limiting block close to the support surface.

8. The optical path adjusting mechanism according to claim 7, wherein an edge of a side of the limiting block facing the elastic limiting structure is provided with a chamfer or a rounded corner.

9. The optical path adjusting mechanism according to any one of claims 1 to 8, wherein the adjusting assembly comprises: a plurality of adjusting screws, a plurality of through holes are provided on the first side of the support along a fourth direction, the fourth direction is arranged at an angle with the first direction, a plurality of the through holes are provided one by one corresponding to a plurality of the adjusting screws, and each adjusting screw is threadedly connected with the base through the corresponding through hole; an elastic piece is arranged between the first side of the support and the base, and the elastic piece has a tendency to drive the first side of the support and the base to move away from each other.

10. An optical device, characterized by the light path adjusting mechanism comprises any one of claims 1 to 9.

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