CN217404605U

CN217404605U - Mirror adjusting device and mirror adjusting assembly

Info

Publication number: CN217404605U
Application number: CN202221455789.6U
Authority: CN
Inventors: 聂艳斌; 闫成亮; 赵建龙; 刘佳尧; 石拓
Original assignee: Zvision Technologies Co Ltd
Current assignee: Zvision Technologies Co Ltd
Priority date: 2022-06-10
Filing date: 2022-06-10
Publication date: 2022-09-09
Anticipated expiration: 2032-06-10

Abstract

The present disclosure relates to a mirror adjusting device, which includes: a mirror; a regulating block; adjusting the bracket; an adjustment mechanism coupling the adjustment block and the adjustment bracket, and configured to adjust the position of the mirror by rotating the adjustment block relative to the adjustment bracket; and an auxiliary fixing part configured to achieve relative fixation between the adjustment block and the adjustment bracket after completion of the position adjustment of the mirror. The present disclosure also relates to a mirror adjustment assembly.

Description

Mirror adjusting device and mirror adjusting assembly

Technical Field

The present disclosure relates to an optical path adjusting apparatus. More particularly, the present disclosure relates to a mirror adjusting apparatus. In addition, the present disclosure also relates to a mirror adjustment assembly.

Background

At present, optical path adjusting devices including reflectors have been widely used in the technical fields of laser radar ranging and the like. For example, in a lidar transmission module, a mirror is used to change the optical path of the laser beam emitted by the laser. The laser radar has very accurate requirement on the optical path, and in the actual assembly process, various deviations of the optical path can be caused due to processing errors, so that an optical path adjusting system needs to be designed, the optical path deviation can be adjusted in the production process, and the optical path is corrected to the theoretical position.

In the existing optical path adjusting system, a common type is to adjust the mirror using three springs and an adjusting plate mounted with three screws. In the adjustment process, the mirror is first fixed to the adjustment plate, and then the angle of the mirror is adjusted by adjusting the heights of the three springs using the three screws. However, such adjustments are time consuming to bring the mirror to the desired angle. In addition, the position of the mirror is adjusted by three springs, and even in the case where the angle of the mirror satisfies the requirement, the front and rear positions of the mirror may be changed.

Another common type is the use of clamping jaws to adjust the mirror. The reflector is clamped by a clamping jaw, and a set of six-axis platform is connected to the rear of the clamping jaw. The reflector is adjusted to a desired position through displacement and rotation of the six-axis platform in the direction X, Y, Z in the rectangular spatial coordinate system, and then the reflector is fixed. However, such adjustment requires a high-precision six-axis system, which is costly. In addition, the clamping jaw and the six-axis platform are complex to assemble, the adjusting time is long, and a space for clamping the clamping jaw needs to be reserved on the periphery of the reflector. For some small-space mirrors, such an adjustment method cannot be used.

SUMMERY OF THE UTILITY MODEL

To address the above-mentioned deficiencies in the prior art, the present disclosure provides a mirror adjustment device that is simple in structure, and that can conveniently, quickly, and reliably adjust a mirror.

According to an aspect of the present disclosure, there is provided a mirror adjusting apparatus including: the reflecting mirror comprises a connecting surface and a reflecting surface opposite to the connecting surface; an adjustment block including a first flat surface and a second hemispherical surface opposite to the first flat surface, a connection surface of the mirror being fixed to the first flat surface of the adjustment block, and a center of sphere of the second hemispherical surface of the adjustment block being located on a reflection surface of a reflection film of the mirror; an adjustment bracket including a first inner concave surface and a second outer convex surface opposite to the first inner concave surface, the first inner concave surface and the second outer convex surface being concentric but different in radius of curvature, and the first inner concave surface being a circular arc surface concentric with and the same in radius of curvature as a second hemispherical surface of the adjustment block, the second hemispherical surface of the adjustment block being joined to the first inner concave surface of the adjustment bracket; an adjustment mechanism coupling the adjustment block and the adjustment bracket, and configured to adjust the position of the mirror by rotating the adjustment block relative to the adjustment bracket; and an auxiliary fixing part configured to achieve relative fixation between the adjustment block and the adjustment bracket after completion of position adjustment of the mirror.

In one embodiment of the mirror adjustment apparatus, the adjustment mechanism comprises an adjustment screw, the adjustment block comprises a first central bore, the adjustment bracket comprises a second central bore, and the adjustment screw couples the adjustment block and the adjustment bracket via the first and second central bores.

In one embodiment of the mirror adjustment apparatus, the adjustment mechanism further comprises an elastic pad disposed between the adjustment bracket and the adjustment screw.

In one embodiment of the mirror adjusting apparatus, the auxiliary fixing part includes: a groove disposed in the first inner concave surface of the adjustment bracket; and glue disposed in the groove.

In one embodiment of the mirror adjusting apparatus, the auxiliary fixing part includes: glue arranged at the connecting part between the adjusting block and the adjusting bracket.

In one embodiment of the mirror adjusting apparatus, the glue is not cured at normal temperature, and after the position adjustment of the mirror is completed, the glue is cured by heating at high temperature to bond the adjusting block and the adjusting bracket together.

In one embodiment of the mirror adjusting apparatus, the auxiliary fixing portion is a welding portion that welds the adjusting block to the adjusting bracket after completion of the position adjustment of the mirror.

In one embodiment of the mirror adjusting apparatus, in a case where no reflective film is provided on the mirror surface of the mirror, the reflective surface of the mirror is the mirror surface of the mirror, and the center of sphere of the second hemispherical surface of the adjusting block is located on the mirror surface of the mirror.

In one embodiment of the mirror adjusting apparatus, in a case where a reflection film is provided on a mirror surface of the mirror, a reflection surface of the mirror is an outer surface of the reflection film, and a center of a sphere of the second hemispherical surface of the adjusting block is located on the outer surface of the reflection film.

According to another aspect of the present disclosure, there is provided a mirror adjustment assembly including: a mirror mounting bracket; and a plurality of mirror adjustment devices mounted to the mirror mounting bracket, each of the plurality of mirror adjustment devices being a mirror adjustment device as described above.

In one embodiment of the mirror adjustment assembly, the plurality of mirror adjustment devices can be adjusted individually in the mirror adjustment assembly to adjust the mirror in each mirror adjustment device to the appropriate position.

In one embodiment of the mirror adjustment assembly, the mirror mounting bracket includes a locating pin and/or a coupling hole.

According to the reflector adjusting device and the reflector adjusting assembly disclosed by the disclosure, the structure is simple, and the reflector can be conveniently, quickly, reliably and accurately adjusted. In addition, reflector adjusting device and reflector adjusting part can with the size looks adaptation of speculum, consequently for the product of installing this disclosed reflector adjusting device and reflector adjusting part is small, compact structure, and space utilization is high.

Drawings

Various objects, features and advantages of the present disclosure will become more apparent from the following description of alternative embodiments thereof, taken in conjunction with the accompanying drawings. The drawings are merely exemplary illustrations of the disclosure and are not necessarily drawn to scale. In the drawings, like reference characters designate the same or similar parts throughout the different views.

Fig. 1 is a sectional view illustrating a mirror adjusting apparatus according to the present disclosure.

Fig. 2 is a schematic view illustrating a mirror and an adjustment block in the mirror adjustment apparatus according to the present disclosure.

Fig. 3 is a schematic view illustrating an adjusting bracket in the mirror adjusting apparatus according to the present disclosure.

Fig. 4A and 4B are schematic views illustrating an elastic pad in the mirror adjusting apparatus according to the present disclosure.

Fig. 5A and 5B are schematic diagrams illustrating a mirror adjustment assembly according to the present disclosure.

Fig. 6 is a schematic diagram illustrating a lidar apparatus according to the present disclosure.

Detailed Description

The present disclosure will now be described with reference to the drawings, which illustrate alternative embodiments of the present disclosure. It should be understood, however, that the present disclosure can be embodied in many different forms and is not limited to the embodiments described below. Rather, the embodiments described below are intended to provide a more complete disclosure of the present disclosure, and to fully convey the scope of the disclosure to those skilled in the art. It is also to be understood that the embodiments disclosed herein can be combined in various ways to provide further additional embodiments. The detailed configuration can be appropriately modified by those skilled in the art within a range not departing from the gist of the present disclosure.

It should be understood that like reference numerals refer to like elements throughout the several views. In the drawings, the size of some of the features may be varied for clarity.

Unless otherwise defined, terms (including technical and scientific terms) used herein shall have the meanings that are commonly understood by one of ordinary skill in the art to which this disclosure pertains. Unless otherwise indicated, the terms "comprising" and "including" as used in the specification and claims should be interpreted in an open-ended fashion, that is, the terms "comprising" and "including" should be interpreted as being synonymous with the terms "including at least" or "including at least".

As used in this disclosure, unless otherwise noted, the terms "upper," "lower," "top," "bottom," and the like are merely relative orientations of the device and its associated components in the orientations as illustrated.

It is to be understood that the terminology used in the description is for the purpose of describing particular embodiments only, and is not intended to be limiting of the disclosure. Well-known functions or constructions may not be described in detail for brevity and/or clarity.

Next, embodiments of a mirror adjusting apparatus and a mirror adjusting assembly according to the present disclosure will be described with reference to the accompanying drawings. This disclosed speculum adjusting device and speculum adjusting part can be connected with laser radar's inside supporting structure to adjust the light path in laser radar's production process, thereby improve laser radar's production efficiency.

Fig. 1-3 and 4A and 4B illustrate embodiments of a mirror adjustment apparatus according to the present disclosure. As shown in the figure, the mirror adjusting apparatus mainly includes: reflector 1, regulating block 2, adjusting bracket 3 and adjusting mechanism.

Referring to fig. 1 and 2, the mirror 1 can be used for a lidar, and the mirror 1 includes a connection surface and a reflection surface opposite to the connection surface. Alternatively, a thin film (reflective film) may be provided on the mirror surface of the mirror 1. Alternatively, the reflective film may be disposed on the mirror surface of the mirror 1 in a plated manner, and the thickness of the reflective film may be 5 to 50 micrometers. The reflecting film can reflect light in a specific waveband range (such as 905 +/-10 waveband or 1550 +/-10 waveband) and does not reflect or absorb light in other wavebands, so that interference of stray light is reduced, and the signal-to-noise ratio of the laser radar is improved.

The adjustment block 2 comprises a first flat surface and a second hemispherical surface opposite the first flat surface. The connecting surface of the reflecting mirror 1 is fixed to the first flat surface of the adjusting block 2, and the center of the second hemispherical surface of the adjusting block 2 is located on the reflecting surface of the reflecting film of the reflecting mirror 1. Alternatively, the spherical center of the second hemispherical surface of the adjusting block 2 may coincide with the center of the reflecting surface of the reflecting mirror 1.

In the case where no reflective film is provided on the mirror surface of the mirror 1, the mirror surface of the mirror 1 is used as the reflective surface of the mirror 1, and the center of sphere of the second hemispherical surface of the adjustment block 2 is located on the mirror surface of the mirror 1. Alternatively, the center of the sphere of the second hemispherical surface of the adjustment block 2 may coincide with the center of the mirror surface of the mirror 1.

In addition, in the case where a reflection film is provided on the mirror surface of the mirror 1, the outer surface of the reflection film is used as the reflection surface of the mirror 1, and the center of sphere of the second hemispherical surface of the adjustment block 2 is located on the outer surface of the reflection film. Alternatively, the spherical center of the second hemispherical surface of the adjustment block 2 may coincide with the center of the outer surface of the reflection film.

Referring to fig. 1 and 3, the adjusting bracket 3 includes a first inner concave surface and a second outer convex surface opposite to the first inner concave surface. The first inner concave surface and the second outer convex surface of the adjusting bracket 3 are concentric but have different curvatures, and the first inner concave surface is a circular arc surface concentric with the second hemispherical surface of the adjusting block 2 and has the same radius of curvature, and the second hemispherical surface of the adjusting block 2 is joined to the first inner concave surface of the adjusting bracket 3.

Referring to fig. 1 and fig. 4A and 4B, the adjustment mechanism couples the adjustment block 2 and the adjustment bracket 3 together, and is configured to adjust the position of the mirror 1 by rotating the adjustment block 2 relative to the adjustment bracket 3.

Optionally, as shown in fig. 1, the adjustment mechanism comprises an adjustment screw 5. Furthermore, the adjustment block 2 comprises a first central hole, the adjustment bracket 3 comprises a second central hole, and the adjustment screw 5 couples the adjustment block 2 and the adjustment bracket 3 via the first and second central holes. In this case, as shown in fig. 2, a flat surface portion that facilitates machining of the screw hole may be provided on the second hemispherical surface of the adjustment block 2, and accordingly the screw hole may be provided on the flat surface portion of the second hemispherical surface as the first center hole. In addition, as shown in fig. 2, four sides of the adjusting block 2 may be of a planar design for positioning the clamp of the adjusting block 2, thereby achieving higher-precision fixation with the reflector 1, and saving space, making the structure more compact.

Further optionally, as shown in fig. 1 and fig. 4A and 4B, the adjusting mechanism further comprises an elastic pad 4 disposed between the adjusting bracket 3 and the adjusting screw 5. There is no particular requirement on the shape and appearance of the elastic pad 4, but it is only necessary to be able to provide a certain elastic support. For example, fig. 4A shows an alternative form of the elastic pad 4, and fig. 4B shows another alternative form of the elastic pad 4'.

When the elastic cushion is used, the connecting depth of the adjusting screw 5 and the adjusting block 2 is changed by rotating the adjusting screw 5, so that the elastic cushion 4 is elastically deformed to different degrees, and the elastic force of the elastic cushion 4 is further controlled. The magnitude of the spring force corresponds to the magnitude of the force required to adjust the rotation. When the elastic force is small, the adjustment screw 5 can be rotated by applying a small force, but the adjustment accuracy is not high and the adjustment screw is easy to loosen. When a high degree of precision adjustment is required, a large spring force is required to apply a large compression to the elastic pad 4.

As described above, the adjusting block 2 can be rotated along the first concave surface of the adjusting bracket 3 by rotating the adjusting screw 5, thereby rotating the reflecting mirror 1 to achieve the position adjustment of the reflecting mirror 1. During the adjustment, the spherical centers of the second hemispherical surfaces of the adjustment block 2 and the first and second concave surfaces of the adjustment bracket 3 are always kept on the outer surface of the reflective film of the reflector 1. By such spherical rotation adjustment, the position of the mirror 1 can be adjusted with high accuracy.

It will be appreciated by those skilled in the art that the use of the resilient pad 4 and the adjustment screw 5 as an adjustment mechanism as described above is only one possible embodiment. The adjustment mechanism may take any other form as long as the position of the mirror 1 can be adjusted by rotating the adjustment block 2 relative to the adjustment bracket 3.

Referring to fig. 1 to 3, the mirror adjusting apparatus further includes an auxiliary fixing portion configured to achieve relative fixation between the adjusting block 2 and the adjusting bracket 3 after completion of the position adjustment of the mirror 1.

Alternatively, the auxiliary fixing part may include: a groove provided in the first inner concave surface of the adjusting bracket 3; and glue disposed in the groove. Alternatively, the auxiliary fixing part may include: glue arranged at the connecting part between the adjusting block 2 and the adjusting bracket 3.

Further optionally, the glue has the characteristic of not being cured at normal temperature and being cured after being heated at high temperature. From this, after accomplishing the position control of speculum 1, shift speculum adjusting device wholly to the high temperature oven and carry out high temperature heating in, concrete heating temperature and heat time can set for according to the glue of chooseing for use. The glue provided in the groove in the first inner concave surface of the adjustment bracket 3 and/or at the connection between the adjustment block 2 and the adjustment bracket 3 is cured at high temperature so that the adjustment block 2 and the adjustment bracket 3 are tightly bonded together. After the position adjustment of the reflector 1 is completed, the adjusting block 2 and the adjusting bracket 3 are directly bonded by the dispensing method, and the reliability is high. Thus, failure of the resilient pad 4 or loosening of the adjustment screw 5 does not affect the position of the mirror 1, thereby keeping the mirror 1 in place at all times.

It will be appreciated by the person skilled in the art that the fixing with glue as described above is only one possible embodiment. The auxiliary fixing portion may take any other form than glue fixing as long as relative fixing between the adjusting block 2 and the adjusting bracket 3 can be achieved after completion of the position adjustment of the reflecting mirror 1. For example, the auxiliary fixing portion may be a welding portion that welds the adjustment block 2 to the adjustment bracket 3 after completion of the position adjustment of the mirror 1, thereby achieving relative fixing between the adjustment block 2 and the adjustment bracket 3.

Fig. 5A and 5B illustrate an embodiment of a mirror adjustment assembly according to the present disclosure. As shown, the mirror adjustment assembly mainly includes: a mirror mounting bracket 6; and a plurality of mirror adjusting devices mounted to the mirror mounting bracket 6. These mirror adjusting devices are all the mirror adjusting devices as described above.

Referring to fig. 5A and 5B, a positioning pin 7 and/or a connection hole 8 may be provided on the mirror mounting bracket 6 for connection with a support member such as the inside of a laser radar.

In such a mirror adjustment assembly, the plurality of mirror adjustment devices can be adjusted one by one to adjust the mirror in each mirror adjustment device to an appropriate position. Moreover, after the position adjustment of the respective mirrors is completed, the mirrors in each mirror adjusting device can be kept in the appropriate positions at all times.

Fig. 6 illustrates a lidar apparatus 800 according to an embodiment of the disclosure. Lidar device 800 may include a laser transmit module 802, a scanner 804, a laser receive module 806, and a controller 808. A mirror adjustment device or mirror adjustment assembly according to the present disclosure is included in the transmit optical path of lidar device 800. Optionally, a mirror adjustment device or a mirror adjustment assembly according to the present disclosure is provided in the laser emitting module 802 of the lidar device 800.

The laser emitting module 802 emits a probe laser beam for scanning the target object 120. Lidar device 800 may include one or more such lasing modules 802.

The scanner 804 is used to deflect the direction of the probing laser beam from the laser emission module 802 to scan the target object 820, enabling a wider emission field of view or scanning field of view. The scanner 804 may include any number of optical mirrors driven by any number of drivers. For example, the scanner 804 may include a plane mirror, a prism, a mechanical galvanometer, a polarization grating, an Optical Phased Array (OPA), a micro-electro-mechanical systems (MEMS) galvanometer. For MEMS galvanometers, the mirror surface rotates or translates in one or two dimensions under electrostatic/piezoelectric/electromagnetic actuation. Driven by the driver, the scanner 804 directs a beam of light from the laser emission module 802 to various locations within the field of view to effect a scan of the field of view.

After the light beam is reflected from the target object 820, a part of the reflected light returns to the laser radar apparatus 800 and is received by the laser receiving module 806. The laser receiving module 806 receives and detects a portion of the reflected light from the target object 820 and generates a corresponding electrical signal. The laser receive module 806 may include a receive unit and associated receive circuitry. Each receiving circuit may be for processing an output electrical signal of a respective receiving unit. The receiving unit includes various forms of photodetectors or one-or two-dimensional arrays of photodetectors, and accordingly, the receiving circuit may be a circuit or an array of circuits. The photodetector measures the power, phase or time characteristics of the reflected light and generates a corresponding current output. The photodetector may be an avalanche diode (APD), a Single Photon Avalanche Diode (SPAD), a PN type photodiode, or a PIN type photodiode.

The controller 808 is communicatively coupled to one or more of the laser emitting module 802, the scanner 804, and the laser receiving module 806. The controller 808 may control whether and when the laser emission module 802 emits a light beam. The controller 808 may control the scanner 804 to scan the light beam to a specific location. The controller 808 may process and analyze the electrical signals output by the laser receive module 806 to ultimately determine the position, velocity, etc., characteristics of the target object 820. The controller 808 may include an Integrated Circuit (IC), an Application Specific Integrated Circuit (ASIC), a microchip, a microcontroller, a central processing unit, a Graphics Processing Unit (GPU), a Digital Signal Processor (DSP), a Field Programmable Gate Array (FPGA), or other circuitry suitable for executing instructions or implementing logical operations. The instructions executed by the controller 808 may be preloaded into an integrated or separate memory (not shown). The memory may store configuration data or commands for the laser emitting module 802, the scanner 804, or the laser receiving module 806. The memory may also store the electric signal output from the laser light receiving module 806 or an analysis result based on the output electric signal. The memory may include Random Access Memory (RAM), Read Only Memory (ROM), a hard disk, an optical disk, a magnetic disk, flash memory or other volatile or non-volatile memory, etc. The controller 808 may include single or multiple processing circuits. In the case of multiple processing circuits, the processing circuits may have the same or different configurations, and may interact or cooperate electrically, magnetically, optically, acoustically, mechanically, etc.

In one or more embodiments, lidar device 800 may also include a transmit lens 810. The transmit lens 810 may be used to expand the beam emitted by the laser transmit module 802 and steered by the scanner 804. The emission lens 810 may include a Diffractive Optical Element (DOE) for shaping, separating, or diffusing the light beam. The transmit lens 810 may be present alone or may be integrated into other components (e.g., the scanner 804 or the laser emitting module 802). The position of the emission lens 810 in the emission optical path from the light source to the target object is not limited to that shown in fig. 6, but may be changed to other positions. For example, the emitting lens may be disposed between the laser emitting module 802 and the scanner 804 such that the light beam emitted by the light source 802 is first expanded by the emitting lens and then deflected by the scanner.

In one or more embodiments, lidar device 800 may also include a receive lens 812. The receiving lens 812 is located before the laser receiving module 806 on a receiving path of the emitted light from the target object 820 to the laser receiving module 806. The receive lens 812 may include an imaging system lens such that the focal point of the reflected beam is in front of or behind or just above the detection surface of the photodetector or photodetector array. In some cases, instead of being present as a separate component, receive lens 812 may also be integrated into laser receive module 806.

In one or more embodiments, lidar device 100 may also include a housing 814 for enclosing one or more of the aforementioned components therein for protection. In some embodiments, the housing 814 is an opaque material, and the housing 814 may be provided with a transparent region or window 816 to allow the transmitted or reflected light beam to pass therethrough. In other embodiments, housing 814 itself is a transparent material, thereby allowing the emitted or reflected light beam to pass from any location. In some embodiments, the launch cradle in the laser launch module 802 may be part of the housing 814.

Lidar device 800 may include a coaxial optical transceiver system or a non-coaxial optical transceiver system. The coaxial optical transceiving system means that a transmission path from the laser transmission module 802 to the target object 820 and a reception path from the target object 820 to the laser reception module 806 are at least partially overlapped. For example, unlike that shown in FIG. 6, the reflected beam may travel back through the scanner 804 to reach the laser receiving module 806. The non-coaxial optical transceiving system means that there is no overlapping portion between a transmission path from the laser transmission module 802 to the target object 820 and a reception path from the target object 820 to the laser reception module 806. For example, as shown in FIG. 6, the reflected beam no longer reaches the laser receiving module 806 via the scanner 804.

Although the present disclosure has been described with reference to exemplary embodiments, those skilled in the art will appreciate that various modifications and variations can be made to the exemplary embodiments of the present disclosure without materially departing from the spirit and scope of the disclosure. The scope of the following claims is to be accorded the broadest interpretation so as to encompass all such modifications and equivalent structures and functions.

Claims

1. A mirror adjustment device, characterized in that the mirror adjustment device comprises:

a mirror including a connection surface and a reflection surface opposite to the connection surface;

an adjustment block including a first flat surface and a second hemispherical surface opposite the first flat surface, the connection face of the mirror being fixed to the first flat surface of the adjustment block, and a center of sphere of the second hemispherical surface of the adjustment block being located on the reflection face of the mirror;

an adjustment bracket including a first inner concave surface and a second outer convex surface opposite to the first inner concave surface, the first inner concave surface and the second outer convex surface being concentric but different in radius of curvature, and the first inner concave surface being a circular arc surface concentric with and the same in radius of curvature as a second hemispherical surface of the adjustment block, the second hemispherical surface of the adjustment block being joined to the first inner concave surface of the adjustment bracket;

an adjustment mechanism coupling the adjustment block and the adjustment bracket, and configured to adjust the position of the mirror by rotating the adjustment block relative to the adjustment bracket; and

an auxiliary fixing part configured to achieve relative fixation between the adjustment block and the adjustment bracket after completion of position adjustment of the mirror.

2. The mirror adjustment apparatus of claim 1, wherein the adjustment mechanism comprises an adjustment screw, the adjustment block comprises a first central aperture, the adjustment bracket comprises a second central aperture, and the adjustment screw couples the adjustment block and the adjustment bracket via the first and second central apertures.

3. The mirror adjustment apparatus according to claim 2, wherein the adjustment mechanism further comprises an elastic pad disposed between the adjustment bracket and the adjustment screw.

4. A mirror adjustment device according to claim 3, wherein the auxiliary fixing portion comprises: a groove disposed in the first inner concave surface of the adjustment bracket; and glue disposed in the groove.

5. A mirror adjustment device according to claim 3, wherein the auxiliary fixing portion comprises: glue arranged at the connecting part between the adjusting block and the adjusting bracket.

6. A mirror adjustment device according to claim 4 or 5, wherein the glue is not cured at normal temperature, and after completion of the position adjustment of the mirror, the glue is cured by heating at high temperature to bond the adjustment block and the adjustment bracket together.

7. The mirror adjustment device according to any one of claims 1 to 3, wherein the auxiliary fixing portion is a welding portion that welds the adjustment block to the adjustment bracket after completion of the position adjustment of the mirror.

8. The mirror adjustment device according to any one of claims 1 to 5, characterized in that, in a case where no reflection film is provided on the mirror surface of the mirror, the reflection surface of the mirror is the mirror surface of the mirror, and the center of sphere of the second hemispherical surface of the adjustment block is located on the mirror surface of the mirror.

9. The mirror adjustment device according to any one of claims 1 to 5, wherein, in a case where a reflection film is provided on the mirror surface of the mirror, the reflection surface of the mirror is an outer surface of the reflection film, and a center of sphere of the second hemispherical surface of the adjustment block is located on the outer surface of the reflection film.

10. A mirror adjustment assembly, comprising:

a mirror mounting bracket; and

a plurality of mirror adjustment devices mounted to the mirror mounting bracket, each of the plurality of mirror adjustment devices being a mirror adjustment device according to any one of claims 1 to 9.

11. A mirror adjustment assembly according to claim 10, wherein the plurality of mirror adjustment means are individually adjustable in the mirror adjustment assembly to adjust the mirror in each mirror adjustment means to the appropriate position.

12. A mirror adjustment assembly according to claim 10 or 11, wherein the mirror mounting bracket comprises a locating pin and/or a coupling hole.