Reflector fixing and adjusting device

Abstract

This invention provides a mirror fixing and adjusting device, including a mirror base for fixing the mirror, a connecting seat on the back of the mirror base, an adjusting seat disposed within the cavity of the optical engine housing, and elastic seats disposed on the side walls of both and connected by screws and pins. The adjusting seat surrounds the connecting seat and a spring is disposed between the two. A mirror base adjusting rod is disposed on the adjusting seat, and an adjusting seat adjusting rod is disposed on the top wall of the optical engine housing. A built-in limiting plate is disposed at the lower end face of the side wall of the housing. In this invention, the translation of the adjusting seat can realize the translation of the mirror normal and the adjustment of the mirror normal deflection. The adjustment operation position is located on the back of the mirror, which solves the problem of limited space on the side of the mirror and meets the requirement of at least 4 degrees of freedom adjustment of the mirror in a confined space.

Description

Technical Field

[0001] This invention relates to the fixing and adjustment of optical elements, and is applicable to the fixing and adjustment of optical elements such as mirrors. Technical Background

[0002] The position and orientation of mirrors in an optomechanical optical path affect the overall optical quality. To ensure the optical accuracy of the optomechanical system, two methods can be used: first, using a high-precision fixed clamping device; second, using a standard-precision adjustable clamping device. High-precision fixed clamping devices imply high machining and assembly precision, which not only leads to high manufacturing costs but also carries the risk of inconsistent quality causing system malfunctions. Standard-precision adjustable devices do not have special requirements for the precision of the machining equipment, making it easy to obtain components that meet the precision requirements. They also do not have special requirements for the assembly environment or assembly technicians. With the assistance of testing equipment, adjusting the position and orientation of the mirrors easily yields a high-quality optical path, thus meeting the precision requirements of the optical system.

[0003] Chinese patent document entitled "Lens Adjustment Mechanism and Optical Path System" (document number CN219039467U, hereinafter referred to as Document 1) discloses an adjustable solution for lenses. The solution includes a fixed base, a lens mount, three adjusting components, and at least one driving component. The driving component can be remotely controlled to drive the adjusting components to rotate, thereby adjusting the distance between the lens mount and the fixed base at the mounting positions of the three adjusting components, and thus adjusting the normal angle of the lens mounted on the lens mount. This overcomes the problems of inconvenient lens adjustment operation and limited applicability of existing lenses.

[0004] While the solution provided in Reference 1 can solve the specific problems of "limited space for reflector installation, inconvenient bolt adjustment, and inability to adjust the reflector after it is encapsulated inside the housing, thus limiting its applicability," Reference 1 also requires the installation of motor-type drive components, and multiple motors are needed because each adjustment component actually needs to be adjusted independently. This undoubtedly increases equipment investment, and the installation of motor-type components also requires adequate space. Furthermore, the solution provided in Reference 1 does not involve typical solutions for the translation of the reflector.

[0005] The document, titled "A Positioning Device and Method for Axial Support Pad of a Large-Aperture Reflector" (Document No. CN114265177A, hereinafter referred to as Document 2), discloses that in the first state, the axial support pad 8 is installed on the positioning ring 4 through the pre-tightening assembly. Under the pre-tightening force of the pre-tightening assembly, the axial support pad 8 abuts against the fine-tuning assembly 5. By adjusting the fine-tuning assembly, the axial support pad is positioned to the first target position. After the first flat washer 21, the spring 3, and the second flat washer 22 are sequentially installed on the pre-tightening screw 1, the pre-tightening screw 1 is connected to the threaded hole on the outer peripheral wall of the axial support pad 8, thus completing the assembly of the axial support pad 8 and the pre-tightening screw 1. At this time, the spring 3 is in the free length state. The fine-tuning component 5 and the pre-tightening screw 1 are both arranged along the radial direction of the positioning ring 4. This requires that sufficient space be reserved around the outer periphery of the positioning ring 4 for operation. For Reference 2, since it belongs to the application scenario of a large-aperture reflector, its surrounding environment has sufficient operating space to be utilized, and the scheme adopted is also in the category of simple structure and easy to implement.

[0006] The solution provided by the name "Six Degrees of Freedom Adjustable Optical Device" (Document No. CN218675452U, hereinafter referred to as Document 3) can also achieve the purpose of parallel translation of the normal of the mirror (10). The adjustment mechanism that achieves the parallel translation of the normal of the mirror (10), namely the translation adjustment component 40, includes a first translation unit 41, a second translation unit 42 and a third translation unit 43 stacked in sequence and adjacent to each other. Document 3 does not disclose the power source for the translation of the first translation unit 41, the second translation unit 42 and the third translation unit 43, that is, Document 3 does not disclose the operating position and direction of the translation unit.

[0007] It is evident that achieving multi-degree-of-freedom adjustment of the reflector in the optical path within a compact optical engine is difficult. The limited space restricts the layout of the adjustment mechanism, especially when there is insufficient operating space on the side of the reflector to perform adjustment operations, or even no space to install an adjustment mechanism consisting of adjustment screws. Technicians must find new ways to solve the problem. Summary of the Invention

[0008] The purpose of this invention is to provide a mirror fixing and adjustment device to solve the problem that the limited space around the mirror in compact optical engines makes it difficult to set up an adjustment mechanism around the mirror and to implement the adjustment operation.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] A mirror fixing and adjusting device includes a mirror base for fixing the mirror, characterized in that: a connecting seat is provided on the back of the mirror base, an adjusting seat is provided in the cavity of the optical engine housing, the adjusting seat surrounds the outer periphery of the connecting seat and a spring is provided between the two, the spring provides elastic force to drive the mirror to move in the opposite direction to the normal F of the mirror.

[0011] The side wall of the adjustment seat is connected to the elastic seat of the side wall of the optical engine housing by a screw pin. The axis of the screw pin is perpendicular to the normal F of the reflector. At least three screw pins are provided in the circumferential range of the side wall of the housing.

[0012] The adjustment base is equipped with a mirror base adjustment rod. The upper end of the mirror base adjustment rod is exposed on the outer wall side of the top wall of the machine housing, and the lower end is in contact with the back of the mirror base. The direction of displacement of the mirror base adjustment rod along its own length is parallel to the direction of the normal F.

[0013] The top wall of the optical machine housing is provided with an adjustment seat and an adjustment rod. At least three adjustment seats and adjustment rods are provided in the circumferential range of the top wall of the housing. The adjustment seat and adjustment rod form a wedge fit with the adjustment seat, and the displacement direction of the adjustment seat and adjustment rod along its own length is parallel to the direction of the normal F.

[0014] A built-in limiting plate is provided at the lower end face of the side wall of the housing, and the limiting plate is located in a position that avoids the incident light and reflected light path of the reflector. When the adjusting rod of the adjusting seat is displaced, the lower end face of the adjusting seat is driven to slide in contact with the limiting surface of the limiting plate, and the limiting surface is perpendicular to the direction of the normal F.

[0015] The above solution solves the problem of achieving multi-degree-of-freedom adjustment of the position and orientation of a mirror in a confined space. The translation of the adjustment seat to adjust the mirror position can be regarded as both the translation of the mirror's normal F and the deflection adjustment of the mirror's normal F. In this invention, the adjustment operations for both the translation and deflection of the mirror's normal are located on the back of the mirror, which objectively solves the spatial limitation of the confined space on the side of the mirror. This invention avoids the need to manufacture high-precision mirror clamping devices, reduces the stringent requirements on the assembly environment and assembly technicians, eliminates the risk of optomechanical malfunction due to unstable manufacturing and assembly quality, and meets the requirement of at least 4 degrees of freedom adjustment of the mirror in a confined space, realizing the requirement of fine-tuning of the mirror. Attached Figure Description

[0016] Figure 1 This is a perspective view of the external shape of the present invention;

[0017] Figure 2 This is a cross-sectional view of the present invention;

[0018] Figure 3 This is a perspective view of the cross-section of the present invention;

[0019] Figure 4 It is a three-dimensional view of the optical engine casing;

[0020] Figure 5 yes Figure 4 Enlarged view of part K;

[0021] Figure 6 This is a half-section three-dimensional schematic diagram of the elastic seat. Detailed Implementation

[0022] For ease of explanation, the reference point for the reflector 1 is first defined as the normal F of the reflector 1. The reflector 1 can be a plane reflector or a curved mirror with a large curvature. The normal F is located at the center of the reflecting surface of the reflector 1, and the normal F of the reflector 1 is simply referred to as normal F. In this application, the definitions of the upper and lower directions and upper and lower parts of the relevant components are described with the normal F pointing downwards. In actual use, the normal F can be arranged upwards, horizontally, or obliquely. When the direction of the normal F changes, such as when the normal F is upwards, the mirror mount 10 is located at the lower part of the reflector 1. The upper and lower positional relationships and upper and lower parts of other components can be reversed accordingly. When the normal F is horizontal and forward pointing towards the observer, the mirror mount 10 is located behind the reflector 1. The positional relationships of other relevant components can be understood as front-back and left-right relationships.

[0023] Combination Figure 1 , 2 The mirror fixing and adjusting device shown in Figure 3 includes a mirror base 10 for fixing the mirror 1. The back of the mirror base 10 has a connecting seat 11. An adjusting seat 40 is provided in the cavity of the optical engine housing 30. The adjusting seat 40 surrounds the connecting seat 11 and a spring 50 is provided between the two. The spring 50 provides elastic force to drive the mirror 1 to move in the opposite direction to the normal F of the mirror 1.

[0024] The above solution utilizes the cavity space of the optical engine housing 30 to accommodate and arrange the relevant components. First, the reflector 1 is fixed on the mirror base 10, and the positional relationship between the reflector 1 and the mirror base 10 is determined accordingly. By adjusting the position and attitude of the mirror base 10, the position and attitude of the reflector 1 can be adjusted.

[0025] The side wall 41 of the adjustment seat 40 is connected to the elastic seat 32 of the housing side wall 31a of the optical engine housing 30 by a screw pin 33. The axis of the screw pin 33 is perpendicular to the normal F of the reflector 1. At least three screw pins 33 are provided in the circumferential range of the housing side wall 31a. In the example shown in the figure, four screw pins 33 are provided.

[0026] An elastic seat 32 is provided on the side wall 31a of the optical engine housing 30. The elastic seat 32 provides elastic constraint support for the screw pin 33. Since the axis of the screw pin 33 is perpendicular to the normal F of the reflector 1, the threaded connection between the threaded section of the screw pin 33 and the side wall 41 of the adjustment seat 40 can be regarded as a rigid connection. When the external force drives the adjustment seat 40 to translate, the constraint between the elastic seat 32 and the head of the screw pin 33 constrains and fixes the displacement of the screw pin 33 in its length direction in an elastic manner. That is, the screw pin 33 first has the possibility of fine adjustment of short-distance displacement along its own length direction, and at the same time, the position after fine adjustment is stable and reliable.

[0027] The adjusting seat 40 is provided with a mirror mount adjusting rod 70. The upper end of the mirror mount adjusting rod 70 is exposed on the outer wall side of the top wall 31b of the housing, and the lower end is in contact with the back of the mirror mount 10. The direction of displacement of the mirror mount adjusting rod 70 along its own length is parallel to the direction of the normal F.

[0028] When the core of the lens mount adjusting rod 70 moves in a direction parallel to the normal F, the position and orientation of the adjusting seat 40 are adjusted to the set requirements. The upper end of the lens mount adjusting rod 70 is exposed on the top wall 31b of the housing, and the lower end of the lens mount adjusting rod 70 abuts against the back of the lens mount 10 to facilitate adjustment. The axial direction of the lens mount adjusting rod 70 is generally parallel to the design direction of the normal F. During adjustment, there may be a small angle between the axial direction of the lens mount adjusting rod 70 and the design direction of the normal F. It is also possible that when the normal F is adjusted to the design direction, there is a small angle between the axial direction of the lens mount adjusting rod 70 and the normal F. The adjustment of the lens mount adjusting rod 70 ensures that the normal F is in the correct orientation for receiving incident light and providing the required reflected light.

[0029] An adjustment rod 60 is provided on the top wall 31b of the optical engine housing 30. At least three adjustment rods 60 are provided within the circumferential range of the top wall 31b. The adjustment rods 60 and the adjustment seat 40 form a wedge fit, and the displacement direction of the adjustment rod 60 along its own length is parallel to the normal F. The driving force of the adjustment seat 40, which serves as the basis for adjusting the position of the lens mount 10, comes from the wedge fit between the adjustment rod 60 and the adjustment seat 40. That is, the adjustment purpose of the adjustment rod 60 is achieved by the core of the adjustment rod 60 moving in a direction parallel to the normal F, and by means of the wedge fit between the two, the adjustment seat 40 obtains displacement power in a direction perpendicular to the normal F. The elastic seat 32 on the side wall 31a of the optical engine housing 30 transmits the elastic constraint to the adjustment seat 40 through the screw pin 33, and the adjustment seat 40 is reliably and stably displaced to the set position.

[0030] A built-in limiting plate 20 is provided at the lower end face of the side wall 31a of the housing, and the limiting plate 20 is located in a position that avoids the incident light and reflected light path of the reflector 1. When the adjusting rod 60 of the adjusting seat moves, it drives the lower end face of the adjusting seat 40 to slide in contact with the limiting surface 211 of the limiting plate 20. The limiting surface 211 is perpendicular to the direction of the normal F.

[0031] Under the limiting action of the limiting plate 20, and the component force perpendicular to the normal F direction applied by the adjusting rod 60 to the adjusting seat 40, the lower end surface of the adjusting seat 40 and the limiting plate 20 form a sliding fit. It can also be said that the contact surface between the limiting plate 20 and the lower end surface of the adjusting seat 40 is perpendicular to the normal F direction.

[0032] The technical solution provided by the present invention solves the problem that the adjustment structure and operation position of the reflector 1 are both located in the external space area of ​​the optical engine housing 30 in the opposite direction of the normal F. This solves the limitation that there is no operating space on the surrounding side of the optical engine housing 30 in the direction perpendicular to the normal F.

[0033] Preferably, the upper end of the connecting seat 11 has a spring seat plate 112, the spring 50 is a compression spring and the upper end of the spring 50 abuts against the spring seat plate 112, and the lower end of the spring 50 presses against the adjusting seat 40. With the adjusting seat 40 as a reference, under the elastic constraint provided by the spring 50, when the mirror mount adjusting rod 70 is adjusted, the connecting seat 11, along with the mirror mount 10 and the reflecting mirror 1, synchronously adjusts its attitude; that is, the direction of the normal F is adjusted. (See [reference]). Figure 1 , 2 3.

[0034] like Figure 1 , 2 In the preferred embodiment shown in 3, the spring seat plate 112 is a disc-shaped plate with a through hole in the middle for the connecting screw 113 to pass through. The connecting seat 11 has a threaded tube section 111 extending upward and in the opposite direction to the normal F. The threaded section of the connecting screw 113 is connected to the threaded tube section 111, and the spring 50 is sleeved on the outer periphery of the threaded tube section 111.

[0035] The spring seat plate 112 is connected to the connecting seat 11 by means of the connecting screw 113. The upper end of the spring 50 abuts against the lower plate surface of the spring seat plate 112. Under the elastic force of the spring 50, the connecting seat 11, together with the mirror seat 10 and the reflector 1, tend to move synchronously in the opposite direction to the normal F.

[0036] like Figure 1 , 2As shown in Figures 3 and 4, the optical engine housing 30 is a barrel-shaped body with its opening facing downwards. A through-hole 31c is located in the middle of the top wall 31b of the housing, through which the spring 50 passes vertically. Because the through-hole 31c allows the spring 50 to pass vertically, the radial dimensions of the spring seat plate 112, the connecting screw 113, and the connecting seat 11 are all smaller than the diameter of the through-hole 31c, ensuring free displacement adjustment of the spring seat plate 112, the connecting screw 113, and the connecting seat 11 in both directions of the normal F. Since the lens mount adjustment rod 70 needs to be easy to adjust, it also needs to extend upwards from the area of ​​the through-hole 31c, such as... Figures 1-4 As shown, the edge of the through hole 31c has a recessed portion and its shape is semi-circular or U-shaped.

[0037] like Figures 1-6 As shown, the elastic seat 32 includes annular rings 321 arranged radially from the inside to the outside. The inner and outer adjacent annular rings 321 are connected by radial connecting parts 322. The radial connecting parts 322 on the inner and outer sides of the same annular ring 321 are arranged in a circumferentially staggered manner. The outermost annular ring 321 is connected to the housing sidewall 31a by the radial connecting parts 322.

[0038] Alternatively, it can be understood that the space between two adjacent inner and outer annular rings 321 forms a C-shaped annular cavity, and the radial connecting part 322 separates the ends of the same C-shaped annular cavity, thereby forming an elastic seat 32. In specific processing, a C-shaped annular cavity can be cut into the side wall 31a of the housing, thereby reserving the radial connecting part 322 at both ends of the cavity in the circumferential direction. The C-shaped annular cavity is cut successively from the inside to the outside, and the radial connecting part 322 is reserved on the opposite side. The innermost annular ring 321 surrounds a complete circular hole. The outer section of the screw pin 33 is inserted into the shaft section, and the inner threaded section of the screw pin 33 is screwed into the threaded hole on the side wall 41 of the adjusting seat 40. During assembly, it is necessary to first ensure that the connection between the screw pin 33 and the threaded hole on the side wall 41 is such that the elastic seat 32 has a pre-tightened position that can deform into the appropriate position inside the side wall 41. This ensures that when the normal F of the reflector 1 is adjusted to the final appropriate position, each elastic seat 32 is still in the pre-tightened state, thus ensuring that the position and attitude of the reflector 1 are reliable and stable.

[0039] Preferably, the line connecting the radial connecting portions 322 passes through the center of the annular ring 321. For example... Figure 5 , 6As shown, five rings 321 are provided. The two radial connecting parts 322 at the top and the three radial connecting parts 322 at the bottom are collinear and the collinearity is located in the vertical direction. This ensures that the deformation amount of each ring 321 is uniform when it deforms, and ensures that the elastic force applied by the elastic seat 32 to the screw pin 33 is concentric with the screw pin 33. That is, it ensures that the elastic constraint force applied by the elastic seat 32 to the adjusting seat 40 is parallel to the limiting surface 211 of the limiting plate 20. The position of the adjusting seat 40 on the surface defined by the limiting surface 211 is stable and reliable.

[0040] like Figure 4 , 5 As shown in Figure 6, the optical engine housing 30 is a cylindrical shape with the opening facing downwards, and the surface of the annular ring 321 is coplanar with the side wall 31a of the housing. This solution can be understood as follows: the annular ring 321 is directly formed on the side wall 31a of the housing. For example, the cylindrical optical engine housing 30 is first machined, and then a C-shaped annular cavity is machined on its side wall 31a using wire cutting or milling. The inner and outer side wall solids of the cavity naturally provide space for the annular ring 321, and the two ends of the C-shaped annular cavity naturally form radial connecting parts 322. This not only easily ensures the core position of the innermost annular ring 321, but also avoids the complex assembly operations and positioning difficulties associated with separately machining the elastic seat and then connecting it to the side wall 31a of the optical engine housing 30.

[0041] like Figure 2 , 3 As shown, the annular hole in the center of the ring 321 allows the screw pin 33 to pass through, and the inner threaded section of the screw pin 33 connects with the threaded hole on the side wall 41 of the adjusting seat 40; see also Figure 5 , 6 As shown, the innermost annular ring 321 has a hole that is a smooth hole and is only used for the through-hole fitting of the optical axis section of the screw pin 33. Only the threaded section of the inner part of the screw pin 33 is threadedly connected to the side wall 41 of the adjusting seat 40. This ensures that the degree of threaded connection between the screw pin 33 and the side wall 41 of the adjusting seat 40 during initial installation is sufficient to achieve a pre-tightening deformation state in which the elastic seat 32 is moderately inclined inward toward the side wall 41 of the adjusting seat 40. This also ensures that all elastic seats 32 apply an adjustable and stable constraint perpendicular to its normal F to the reflector 1.

[0042] The mirror base 10 is a cylindrical shape with the opening facing downwards. The reflector 1 is fixed inside the cavity of the mirror base 10, and the reflecting surface 1a of the reflector 1 protrudes from the bottom of the mirror base 10. The reflecting surface 1a of the reflector 1 is a circular area. The cylindrical mirror base 10 can reliably fix the reflector 1 and conveniently reserve space for the transmission of incident and reflected light on the reflecting surface 1a. It also provides a suitable location for constraining and fixing the mirror base 10. In particular, the bottom of the barrel is located on the back of the reflecting surface 1a and is used as a force-bearing part for adjustment. These force-bearing parts during adjustment avoid the limited space on the side of the reflecting surface 1a.

[0043] like Figure 1 , 2 As shown in Figure 3, the adjusting seat 40 is a cylindrical shape with the opening facing downwards. The limiting plate 20 is flange-shaped, and the convex ring 21 at the inner hole edge is inserted into the lower opening of the optical machine housing 30. The outer disc surface of the limiting plate 20 is connected to the outer flange edge 31d at the lower end of the side wall 31a of the housing in a flange-like manner. The opening end face of the adjusting seat 40 is pressed against the upper end face of the convex ring 21 of the limiting plate 20, and the upper end face of the convex ring 21 forms the limiting surface 211. The cylindrical shape of the adjusting seat 40 matches the shape of the mirror base 10. This allows the adjusting seat 40 to surround the outer periphery of the mirror base 10 while avoiding obstruction of the working surface of the reflector 1, ensuring that the reflector 1 can normally receive incident light and reflect the beam. At the same time, the end face of the adjusting seat 40 and the limiting plate 20 are used to limit the translation surface of the adjusting seat 40. The top 42 of the adjusting seat 40, which is located on the back of the reflector 1, is used to set the mirror base adjusting rod 70, so that the operation of adjusting the attitude of the mirror base 10 is located on the back of the reflector 1.

[0044] like Figure 1 , 2 As shown in Figure 3, the adjusting seat 40 is a cylindrical shape with the opening facing downwards. The top 42 of the seat and the side wall 41 are connected by a conical transition surface 43. The adjusting seat adjusting rod 60 is screwed into the threaded hole of the top wall 31b of the housing. The ball-shaped lower end of the adjusting seat adjusting rod 60 abuts against the conical transition surface 43 and forms a wedge fit. At least three adjusting seat adjusting rods 60 are provided in the circumferential range of the conical transition surface 43, preferably three to four. The conical transition surface 43 is provided between the top 42 of the seat and the side wall 41 for transition. The conical transition surface 43 is a truncated cone with a cross-section that is smaller at the top and larger at the bottom. This not only obtains a wedge fit structure that cooperates with the adjusting seat adjusting rod 60, but also ensures that the operation of the adjusting seat 40 for translation adjustment is located on the back of the reflector 1.

[0045] The technical solution provided by this invention enables all operations for adjusting the attitude and position of the normal F of the reflector 1 to be completed within the space area on the back of the reflector 1, solving the problem of no adjustment operation space or severely limited operation space on the side of the reflector 1. In the example shown in the figure, at least four adjustment rods 60 are provided in the circumferential range of the conical transition surface 43, which can quickly adjust the position of the normal F of the reflector 1, and the normal F of the reflector 1 is stably adjusted to the adjustment position by means of the elastic constraint applied by the elastic seat 32 to the adjustment seat 40.

[0046] The solution provided in this application can realize the adjustment of the normal F of the reflector 1 along the XY plane, the displacement in the Z direction, and the rotation around the X and Y axes with 5 degrees of freedom.

Claims

1. A mirror fixing and adjusting device, comprising a mirror base (10) for fixing a mirror (1), characterized in that: The back of the mirror mount (10) has a connecting seat (11), and an adjustment seat (40) is provided in the cavity of the optical engine housing (30). The adjustment seat (40) surrounds the outer periphery of the connecting seat (11) and a spring (50) is provided between the two. The spring (50) provides elastic force to drive the mirror (1) to move in the opposite direction to the normal F of the mirror (1). The side wall (41) of the adjustment seat (40) and the elastic seat (32) of the housing side wall (31a) of the optical engine housing (30) are connected by screw pins (33). The axial direction of the screw pins (33) is perpendicular to the normal F of the reflector (1). At least three screw pins (33) are provided in the circumferential range of the housing side wall (31a). The elastic seat (32) includes annular rings (321) arranged radially from the inside to the outside. The inner and outer adjacent annular rings (321) are connected by a radial connecting part (322). The outermost annular ring (321) is connected to the side wall (31a) of the housing by a radial connecting part (322). The adjustment seat (40) is provided with a mirror mount adjustment rod (70). The upper end of the mirror mount adjustment rod (70) is exposed on the outer wall side of the top wall (31b) of the housing, and the lower end is in contact with the back of the mirror mount (10). The mirror mount adjustment rod (70) is parallel to the direction of the normal line F along its own rod length displacement direction. An adjustment rod (60) is provided on the top wall (31b) of the optical machine housing (30). At least three adjustment rods (60) are provided in the circumferential range of the top wall (31b) of the housing. The adjustment rod (60) and the adjustment seat (40) form a wedge fit and the adjustment rod (60) is parallel to the direction of the normal F along its own rod length displacement direction. A built-in limiting plate (20) is provided at the lower end face of the side wall (31a) of the housing, and the limiting plate (20) is located in the clearance position of the incident light and reflected light path of the reflector (1). When the adjusting rod (60) of the adjusting seat is displaced, the lower end face of the adjusting seat (40) is driven to slide in a close fit with the limiting surface (211) of the limiting plate (20), and the limiting surface (211) is perpendicular to the direction of the normal F.

2. The mirror fixing and adjusting device according to claim 1, characterized in that: The upper end of the connecting seat (11) has a spring seat plate (112), the spring (50) is a compression spring and the upper end of the spring (50) rests on the spring seat plate (112) and the lower end of the spring (50) presses on the adjusting seat (40).

3. The mirror fixing and adjusting device according to claim 2, characterized in that: The spring seat plate (112) is a disc-shaped plate with a through hole in the middle for the connecting screw (113) to pass through. The connecting seat (11) has a threaded pipe section (111) extending in the opposite direction to the normal line F. The threaded section of the connecting screw (113) is connected to the threaded pipe section (111). The spring (50) is sleeved on the outer periphery of the threaded pipe section (111).

4. The mirror fixing and adjusting device according to claim 2 or 3, characterized in that: The optical machine housing (30) is a barrel-shaped body with the opening facing downwards. The top wall (31b) of the housing has a through hole (31c) in the middle for the spring (50) to pass through vertically.

5. The mirror fixing and adjusting device according to claim 1, characterized in that: The radial connecting parts (322) inside and outside the same annular ring (321) are arranged in a circumferentially staggered manner.

6. The mirror fixing and adjusting device according to claim 5, characterized in that: The line connecting the radial connecting part (322) passes through the center of the annular ring (321).

7. The mirror fixing and adjusting device according to claim 5, characterized in that: The optical machine housing (30) is a cylindrical shape with the opening facing downwards, and the surface of the annular ring (321) is coplanar with the side wall (31a) of the housing.

8. The mirror fixing and adjusting device according to claim 5, 6, or 7, characterized in that: The annular ring (321) at the center has a hole through which the screw pin (33) passes, and the inner threaded section of the screw pin (33) is connected to the threaded hole on the side wall (41) of the adjusting seat (40).

9. The mirror fixing and adjusting device according to claim 1, 2, 3, or 7, characterized in that: The mirror base (10) is a cylindrical shape with the mouth of the barrel facing down. The mirror (1) is fixed inside the barrel cavity of the mirror base (10) and the reflecting surface (1a) of the mirror (1) protrudes below the mirror base (10). The reflecting surface (1a) of the mirror (1) is a circular area.

10. The mirror fixing and adjusting device according to claim 1, 2, 3, or 7, characterized in that: The adjusting seat (40) is a cylindrical shape with the opening facing down. The limiting plate (20) is a flange shape and the convex ring (21) at the inner hole edge is inserted into the lower opening of the optical machine housing (30). The outer plate surface of the limiting plate (20) and the outer flange edge (31d) at the lower end of the side wall (31a) of the housing form a flange connection. The opening end face of the adjusting seat (40) is pressed against the upper end face of the convex ring (21) of the limiting plate (20). The upper end face of the convex ring (21) forms the limiting surface (211).

11. The mirror fixing and adjusting device according to claim 1, characterized in that: The adjusting seat (40) is a cylindrical shape with the opening facing downwards. The top (42) of the seat and the side wall (41) are connected by a conical transition surface (43). The adjusting seat adjusting rod (60) is screwed into the threaded hole on the top wall (31b) of the housing. The ball-shaped lower end of the adjusting seat adjusting rod (60) abuts against the conical transition surface (43) and forms a wedge fit. At least three adjusting seats (60) are provided in the circumferential range of the conical transition surface (43).

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