Rotating mirror and laser radar

Abstract

The utility model provides a rotating mirror and a laser radar, and relates to the technical field of laser ranging, and the rotating mirror comprises a rotating mirror pedestal, an extinction part, a motor, a rotating mirror support, and a rotating mirror reflector. The rotating mirror base comprises an installation end face, the motor is fixedly connected with the installation end face, the rotating mirror support is arranged on the outer side of the motor in a sleeving mode, the output end of the motor is connected with the rotating mirror support, and the rotating mirror reflecting mirror is fixedly connected with the outer side wall of the rotating mirror support; the extinction piece covers a target area of the mounting end face and is fixedly connected with the rotating mirror base, the end face, back to the mounting end face, of the extinction piece is an extinction face, and the end face, back to the mounting end face, of the extinction piece is an extinction face. The light reflectivity of the light extinction surface in the working wave band of the laser radar is lower than the light reflectivity of the mounting end surface in the working wave band of the laser radar. When the rotating mirror is applied to the laser radar, the laser detection effect of the to-be-detected object can be improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of lidar, and particularly relates to a rotating mirror and a lidar. Background Art

[0002] A lidar is a radar system that uses lasers to detect the position, speed, and other characteristic quantities of a target object. Its working principle is as follows: The radar system emits a light source from a laser emission board. After being shaped by an emission lens, it is reflected on a beam splitter to change its direction. Through the rotation of a rotating mirror, it is reflected by the rotating mirror outside the radar system. The laser reflected back by an external object is then reflected by the rotating mirror into a receiving lens barrel. After being shaped by a receiving lens and reflected by a reflecting mirror, it finally reaches the surface of a receiving chip.

[0003] During the process of the light beam emitting outward, a part of the laser will irradiate the upper surface of the base where the rotating mirror is located and directly return to the receiving lens barrel without being reflected by the object to be measured. This will cause interference to the object to be measured. That is to say, the lidar provided by the related technology has a poor laser detection effect on the object to be measured. Summary of the Utility Model

[0004] The purpose of the present disclosure is to provide a rotating mirror and a lidar, which are used to solve the technical problem that the lidar provided by the related technology has a poor laser detection effect on the object to be measured.

[0005] In a first aspect, in an embodiment of the present disclosure, a rotating mirror is provided, including:

[0006] A rotating mirror base, an extinction member, a motor, a rotating mirror bracket, and a rotating mirror reflector;

[0007] The rotating mirror base includes an installation end face. The motor is fixedly connected to the installation end face. The rotating mirror bracket is sleeved outside the motor, and the output end of the motor is connected to the rotating mirror bracket to drive the rotating mirror bracket to rotate. The rotating mirror reflector is fixedly connected to the outer side wall of the rotating mirror bracket;

[0008] The extinction member covers a target area of the installation end face, and the extinction member is fixedly connected to the rotating mirror base. Wherein, the target area is the other area of the installation end face except the area where the motor is located. The end face of the extinction member facing away from the installation end face is an extinction surface, and the light reflectivity of the extinction surface in the working wavelength band of the lidar is lower than the light reflectivity of the installation end face in the working wavelength band of the lidar.

[0009] In one embodiment, the extinction member includes: an extinction plate covering the installation end face, and a flanging portion that is bent toward one side of the rotating mirror base along the edge of the rotating mirror base. A protrusion is provided on the inner wall of the flanging portion, and the rotating mirror base is clamped between the protrusion and the extinction plate.

[0010] In one embodiment, the light extinction member includes at least two of the flanges, and among the at least two flanges, adjacent flanges are arranged at an angle, and at least one of the protrusions is provided on the inner wall of each flange.

[0011] In one embodiment, the flange includes an ear plate extending away from the mounting end face, and the protrusion is provided on the inner wall of the ear plate.

[0012] In one embodiment, the rotating mirror further includes a rotating housing sleeved outside the motor and covering the outer side wall of the motor, the rotating mirror bracket is sleeved outside the rotating housing, the output end of the motor is fixedly connected to the rotating housing, and the rotating housing is fixedly connected to the rotating mirror bracket.

[0013] In one embodiment, the strength of the rotating mirror base is greater than that of the light extinction member, and a light extinction paint is sprayed on the light extinction surface.

[0014] In one embodiment, the mounting end face of the rotating mirror base is provided with a recessed area, the recessed area is provided with a first connection hole, the axis of the first connection hole is perpendicular to the mounting end face, the light extinction member includes a protruding area corresponding to the recessed area, the protruding area is embedded in the recessed area, and the protruding area is provided with a second connection hole coaxially arranged with the first connection hole, and the light extinction member is fixedly connected to the first connection hole of the rotating mirror base through the second connection hole.

[0015] In one embodiment, the light extinction member is C-shaped.

[0016] In a second aspect, in an embodiment of the present disclosure, a lidar is further provided, including:

[0017] A radar base, a laser emission board, a first emission lens, a second emission lens, a third emission lens, a beam splitter, a filter, a first receiving lens, a second receiving lens, a reflector, a third receiving lens, a receiving chip, and a rotating mirror as described in the first aspect;

[0018] A laser emission path is provided on the radar base, and the laser emission board, the first emission lens, the second emission lens, and the third emission lens are sequentially installed on the radar base along the laser emission path;

[0019] A first laser receiving path is provided on the radar base, the filter, the first receiving lens, and the second receiving lens are sequentially installed on the radar base along the first laser receiving path, the beam splitter is installed on the radar base, and the beam splitter is located at the intersection of the laser emission path and the first laser receiving path;

[0020] A second laser receiving path is provided on the radar base. The first laser receiving path is located between the second laser receiving path and the laser transmitting path. The third receiving lens and the receiving chip are sequentially installed on the radar base along the second laser receiving path. The reflecting mirror is installed on the radar base and is located at the intersection of the first laser receiving path and the second laser receiving path.

[0021] The rotating mirror is installed on the radar base. The rotating mirror is located on the side of the laser transmitting path away from the laser receiving path, and the rotating mirror is adjacent to a light-transmitting area provided on the radar base.

[0022] In one embodiment, the target area includes: in the mounting end face, the area located between the rotating mirror reflecting mirror and the beam splitter.

[0023] In the present application, by providing an extinction member with a lower light reflectivity on the rotating mirror base, it is convenient to absorb the laser light incident on the rotating mirror base, reduce the stray light reflected by the rotating mirror base and entering the receiving end, thereby weakening the interference of the stray light on the receiving end and improving the laser detection effect of the object to be measured. Description of the Drawings

[0024] Figure 1 is a schematic structural diagram of a lidar provided by the related art;

[0025] Figure 2 is a schematic diagram of the light propagation path of the lidar provided by the related art;

[0026] Figure 3 is a schematic diagram of the propagation of the emitted light of the lidar provided by the related art;

[0027] Figure 4 is an exploded view of a rotating mirror provided by an embodiment of the present application;

[0028] Figure 5 is one of the schematic diagrams of a rotating mirror provided by an embodiment of the present application;

[0029] Figure 6 is another schematic diagram of a rotating mirror provided by an embodiment of the present application;

[0030] Figure 7 is a schematic diagram of an extinction member provided by an embodiment of the present application;

[0031] Figure 8 is a sectional view of a rotating mirror provided by an embodiment of the present application;

[0032] Figure 9 is a side view of a rotating mirror provided by an embodiment of the present application;

[0033] Figure 10 It is a schematic diagram of a lidar provided by an embodiment of the present application. Detailed implementation manners

[0034] Next, the technical solutions in the embodiments of the present disclosure will be described with reference to the accompanying drawings in the embodiments of the present disclosure.

[0035] As Figure 1 and Figure 2 shown, the lidar in the related art includes: a radar base 101, a laser emission board 102, a first emission lens 103, a second emission lens 104, a third emission lens 105, a beam splitter 106, a filter 107, a first receiving lens 108, a second receiving lens 109, a reflector 110, a third receiving lens 111, a receiving chip 112, and a rotating mirror 113;

[0036] A laser emission path 1011 is provided on the radar base 101, and the laser emission board 102, the first emission lens 103, the second emission lens 104, and the third emission lens 105 are sequentially installed on the radar base 101 along the laser emission path 1011;

[0037] A first laser receiving path 1012 is provided on the radar base 101, and the filter 107, the first receiving lens 108, and the second receiving lens 109 are sequentially installed on the radar base 101 along the first laser receiving path 1012. The beam splitter 106 is installed on the radar base 101, and the beam splitter 106 is located at the intersection of the laser emission path 1011 and the first laser receiving path 1012;

[0038] A second laser receiving path 1013 is provided on the radar base 101. The first laser receiving path 1012 is located between the second laser receiving path 1013 and the laser emission path 1011. The third receiving lens 111 and the receiving chip 112 are sequentially installed on the radar base 101 along the second laser receiving path 1013. The reflector 110 is installed on the radar base 101, and the reflector 110 is located at the intersection of the first laser receiving path 1012 and the second laser receiving path 1013;

[0039] The rotating mirror 113 is installed on the radar base 101. The rotating mirror 113 is located on the side of the laser emission path 1011 away from the first laser receiving path 1012, and the rotating mirror 113 is adjacent to a light-transmitting area provided on the radar base 101.

[0040] Figure 1In the figure, the gray area / shaded area is used to indicate the aforementioned laser emission path, the first laser reception path, and the second laser reception path; Figure 2 In the figure, the thick black arrow is used to represent the emission light of the lidar, and the thin black arrow is used to represent the reception light of the lidar.

[0041] The specific process of laser transceiver of the lidar is as follows: The light source is generated by the laser emission board 102 and transmitted outward along the laser emission path 1011. After the emission light is sequentially shaped by the first emission lens 103, the second emission lens 104, and the third emission lens 105, it enters the beam splitter 106. After being reflected by the beam splitter 106, the emission light enters the rotating mirror 113. After being reflected by the rotating mirror 113, the emission light is emitted from the light-transmitting area to the outside of the radar;

[0042] The emission light emitted to the outside of the radar is reflected by an external object and returns to the rotating mirror 113 through the light-transmitting area. After being reflected by the rotating mirror 113, the received light enters the first laser reception path 1012 and sequentially passes through the filter 107, the first reception lens 108, and the second reception lens 109, and then enters the reflector 110. After being reflected by the reflector 110, it enters the second laser reception path 1013 and finally reaches the surface of the reception chip 112 after being shaped by the third reception lens 111.

[0043] As Figure 3 shown, when the emission light enters the rotating mirror 113, a part of it scatters on the rotating mirror 113 reflector 110 (i.e., the mirror body provided on the side wall of the rotating mirror 113). After being reflected by the rotating mirror 113 reflector 110, this part of the emission light will be emitted from the light-transmitting area to the outside of the radar; while the other part scatters on the upper surface of the base of the rotating mirror 113 (i.e., Figure 3 the position A shown by the arrow in the figure), and will not be emitted from the light-transmitting area to the outside of the radar, but directly enters the first laser reception path 1012 and causes interference to the object to be measured. Specifically, it exists in the form of "ghost images" in the detection screen of the lidar, which makes the laser detection effect of the object to be measured poor.

[0044] Based on this, the embodiments of the present application provide a rotating mirror and a lidar having the rotating mirror, so as to conveniently eliminate the laser incident on the base of the rotating mirror by providing an extinction member with a lower light reflectivity on the base of the rotating mirror, reduce the stray light reflected by the base of the rotating mirror and entering the receiving end, thereby weakening the interference of the stray light on the receiving end and improving the laser detection effect of the object to be measured.

[0045] Specifically, a rotating mirror provided by the embodiments of the present application, as Figure 4 shown, includes:

[0046] Rotating mirror base 201, light extinction member 202, motor 203, rotating mirror bracket 204, and rotating mirror reflector 205;

[0047] The rotating mirror base 201 includes a mounting end face, the motor 203 is fixedly connected to the mounting end face, the rotating mirror bracket 204 is sleeved outside the motor 203, and the output end of the motor 203 is connected to the rotating mirror bracket 204 to drive the rotating mirror bracket 204 to rotate. The rotating mirror reflector 205 is fixedly connected to the outer wall of the rotating mirror bracket 204;

[0048] The light extinction member 202 covers a target area of the mounting end face, and the light extinction member 202 is fixedly connected to the rotating mirror base 201. Wherein, the target area is the other area of the mounting end face except the area where the motor 203 is located. The end face of the light extinction member 202 facing away from the mounting end face is a light extinction surface, and the light reflectivity of the light extinction surface in the working band of the lidar is lower than the light reflectivity of the mounting end face in the working band of the lidar.

[0049] In this application, the mounting end face can be understood as the upper surface of the rotating mirror base 201, that is, the side of the rotating mirror base 201 facing away from the lidar base of the lidar (when the rotating mirror is installed inside the lidar).

[0050] The working band of the lidar can be adaptively set according to actual needs. For example: bands such as 1000nm to 2500nm, 700nm to 1550nm, etc. This application does not make any limitations in this regard.

[0051] Exemplarily, at least one of the following operations can be used to form the light extinction surface: spraying light extinction paint on the end face of the light extinction member 202 facing away from the mounting end face, making the light extinction member 202 with light extinction material, and setting an outward protrusion for light extinction on the end face of the light extinction member 202 facing away from the mounting end face.

[0052] In application, as Figure 5 and Figure 6 shown, the assembly process of the rotating mirror can be:

[0053] Install the light extinction member 202 on the rotating mirror base 201, and make the light extinction member 202 cover the target area of the mounting end face. Fix the motor 203 at a preset mounting position on the mounting end face. Bond the rotating mirror reflector 205 to the outer wall of the rotating mirror bracket 204 with glue, and fixedly connect the output shaft of the motor 203 and the rotating mirror bracket 204.

[0054] In application, the usage process of the rotating mirror can be:

[0055] Upon receiving a rotation instruction, the motor 203 drives the output shaft to rotate by a corresponding angle based on the received rotation instruction, and drives the mirror holder 204 to rotate by the same angle, thereby updating the actual position of the mirror reflector 205 in the lidar to the position indicated by the rotation instruction.

[0056] In this application, the number of mirror reflectors 205 is the same as the number of outer side walls of the mirror holder 204, and one mirror reflector 205 is provided on one outer side wall of the mirror holder 204.

[0057] In one embodiment, the rotating mirror further includes a rotating housing, which is sleeved outside the motor 203 and covers the outer side wall of the motor 203. The mirror holder 204 is sleeved outside the rotating housing. The output end of the motor 203 is fixedly connected to the rotating housing, and the rotating housing is fixedly connected to the mirror holder 204.

[0058] In this embodiment, through the setting of the rotating housing, the motor 203 is protected, the probability of foreign objects or moisture entering the interior of the motor 203 is reduced, the service life of the motor 203 is extended, and at the same time, the fixed connection between the motor 203 and the mirror holder 204 is facilitated.

[0059] Exemplarily, a limit protrusion 2031 can be provided on the end face of the rotating housing facing away from the mirror base 201, and a plurality of first locking holes 2032 are formed around the limit protrusion 2031. At the same time, a limit groove 2041 is formed on the mirror holder 204 corresponding to the limit protrusion, and a plurality of second locking holes 2042 are formed around the limit groove 2041. At this time, the fixing process of the mirror holder 204 on the rotating housing is as follows: the mirror holder 204 is sleeved outside the rotating housing along the axial direction of the limit groove 2041, the limit protrusion 2031 is received in the limit groove 2041, and the plurality of first locking holes 2032 and the plurality of second locking holes 2042 are kept coaxial. Finally, the mirror holder 204 and the rotating housing are fixedly connected by screwing the screws into the coaxial first locking holes 2032 and second locking holes 2042.

[0060] In one embodiment, a recessed area 2011 is provided on the mounting end face of the rotating mirror base 201. A first connection hole 2012 is provided in the recessed area 2011. The axis of the first connection hole 2012 is perpendicular to the mounting end face. The light extinction member 202 includes a protruding area 2021 corresponding to the recessed area 2011. The protruding area 2021 is embedded in the recessed area 2011, and a second connection hole 2022 coaxially arranged with the first connection hole 2012 is provided in the protruding area 2021. The light extinction member 202 is fixedly connected to the first connection hole 2012 of the rotating mirror base 201 through the second connection hole 2022.

[0061] In this embodiment, through the arrangement of the mutually cooperating recessed area 2011 and protruding area 2021, and the coaxially arranged first connection hole 2012 and second connection hole 2022, the fixation of the light extinction member 202 on the rotating mirror base 201 is conveniently completed.

[0062] In one example, the rotating mirror base 201 is rectangular. There are four recessed areas 2011, and the four recessed areas 2011 are respectively arranged at the four end corners of the mounting end face. A first connection hole 2012 is provided in each recessed area 2011; there are also four corresponding protruding areas 2021, and a second connection hole 2022 is provided in each protruding area 2021.

[0063] In one embodiment, as Figure 7 and Figure 8 shown, the light extinction member 202 includes: a light extinction plate 2023 covering the mounting end face, and a flanging 2024 bent toward one side of the rotating mirror base 201 along the edge of the rotating mirror base 201. A protrusion 2025 is provided on the inner wall of the flanging 2024. The rotating mirror base 201 is clamped between the protrusion 2025 and the light extinction plate 2023.

[0064] In this embodiment, through the cooperative arrangement of the flanging 2024 and the protrusion 2025, the limiting of the light extinction member 202 on the rotating mirror base 201 is conveniently realized, thereby facilitating the fixation of the light extinction member 202 on the rotating mirror base 201.

[0065] Specifically, the fixation process of the light extinction member 202 on the rotating mirror base 201 is as follows: cover the light extinction plate 2023 on the mounting end face, and deform the flanging 2024 to transfer the protrusion 2025 from the side where the mounting end face is located to the side of the rotating mirror base 201 facing away from the light extinction plate 2023. Then, the flanging 2024 returns to its original shape, and the rotating mirror base 201 is clamped between the protrusion 2025 and the light extinction plate 2023; finally, the light extinction member 202 and the rotating mirror base 201 are fixedly connected by passing a screw through the coaxially arranged first connection hole 2012 and second connection hole 2022.

[0066] In one example, it can be as Figure 9 shown, set the thickness of the flanging 2024 to 0.2 mm, and the height of the protrusion 2025 to 0.4 mm.

[0067] In one embodiment, the light extinction member 202 includes at least two of the flangings 2024, and among the at least two flangings 2024, adjacent flangings 2024 are arranged at an angle, and at least one of the protrusions 2025 is provided on the inner wall of each flanging 2024.

[0068] In this embodiment, by providing at least two flangings 2024 and by providing at least one protrusion 2025 on the inner wall of each flanging 2024, the limiting effect of the light extinction member 202 on the rotating mirror base 201 is enhanced, and the connection stability of the fixed connection between the light extinction member 202 and the rotating mirror base 201 is strengthened.

[0069] The number of flangings 2024 of the light extinction member 202 is less than or equal to the number of side walls of the rotating mirror base 201. For example: when the rotating mirror base 201 is rectangular, the number of side walls of the rotating mirror base 201 is 4. At this time, the number of flangings 2024 of the light extinction member 202 can be 2, 3, or 4, and the angle between adjacent flangings 2024 is a right angle.

[0070] In one embodiment, the flanging 2024 includes an ear plate extending along the side away from the mounting end face, and the protrusion 2025 is provided on the inner wall of the ear plate.

[0071] In this embodiment, by providing the ear plate, on the one hand, the material cost of the flanging 2024 can be reduced, and on the other hand, the deformation of the flanging 2024 can be facilitated, and the operation difficulty of clamping the rotating mirror base 201 between the protrusion 2025 and the light extinction plate 2023 can be reduced.

[0072] In one embodiment, the strength of the rotating mirror base 201 is greater than the strength of the light extinction member 202, and a light extinction paint is sprayed on the light extinction surface.

[0073] In this embodiment, by providing the rotating mirror base 201 with greater strength, the structural stability of the rotating mirror can be ensured. And by the detachable connection of the light extinction member 202 with a strength lower than that of the rotating mirror base 201 and by spraying the light extinction paint to form the light extinction surface, the split setting of the light extinction surface and the rotating mirror base 201 can be realized, and thus the light extinction requirements in different scenarios can be flexibly met, and the versatility of the rotating mirror can be improved.

[0074] Exemplarily, the rotating mirror base 201 can be made of stainless steel 316 material, and the light extinction member 202 can be made of stainless steel 304 material.

[0075] In one embodiment, the matte element 202 is C-shaped.

[0076] In this embodiment, by providing a C-shaped extinction piece 202, while meeting the extinction requirements of the rotating mirror, the material cost and weight of the extinction piece 202 are reduced, thereby reducing the manufacturing cost and weight of the rotating mirror, and thus reducing the manufacturing cost and weight of the laser radar on which the rotating mirror is placed.

[0077] It should be noted that when the rotating mirror is applied to a laser radar, the target area covered by the C-shaped matte element 202 includes at least: an area in the mounting end surface located between the rotating mirror reflector 205 and the beam splitter.

[0078] The present application also provides a laser radar, similar to Figure 1 and Figure 2 The lidar setup shown includes:

[0079] A radar base, a laser emitting plate, a first emitting lens, a second emitting lens, a third emitting lens, a beam splitter, a filter, a first receiving lens, a second receiving lens, a reflector, a third receiving lens, a receiving chip, and the rotating mirror described in the above embodiments;

[0080] The radar base is provided with a laser emission path, and the laser emission plate, the first emission lens, the second emission lens, and the third emission lens are sequentially installed on the radar base along the laser emission path;

[0081] The radar base is provided with a first laser receiving path, the filter, the first receiving lens, and the second receiving lens are sequentially installed on the radar base along the first laser receiving path, the beam splitter is installed on the radar base, and the beam splitter is located at the intersection of the laser emission path and the first laser receiving path;

[0082] The radar base is provided with a second laser receiving path, the first laser receiving path is located between the second laser receiving path and the laser transmitting path, the third receiving lens and the receiving chip are sequentially installed on the radar base along the second laser receiving path, the reflector is installed on the radar base, and the reflector is located at the intersection of the first laser receiving path and the second laser receiving path;

[0083] The rotating mirror is installed on the radar base, and is located on a side of the laser transmitting path away from the laser receiving path, and the rotating mirror is adjacent to a light-transmitting area arranged on the radar base.

[0084] In this application, a light extinction component is added to the rotating mirror of the lidar to reduce the stray light reflected by the rotating mirror base and entering the receiving end, thereby weakening the interference of the stray light on the receiving end and improving the laser detection effect of the object to be measured. This solution has low implementation cost, simple process operation, and will not reduce the reliability and stability of the rotating mirror.

[0085] In one embodiment, as Figure 10 shown, the target area includes: in the mounting end face, the area between the rotating mirror reflector and the beam splitter.

[0086] In this embodiment, by defining that the target area includes the area between the rotating mirror reflector and the beam splitter in the mounting end face, it is ensured that the light extinction component can fully absorb the emitted light that does not correctly hit the rotating mirror reflector, and the light extinction effect of the light extinction component can be fully exerted.

[0087] The term "comprising" or any other variant thereof in the embodiments of the present disclosure is intended to cover non-exclusive inclusion, such that a process, method, article, or device including a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article, or device including the element.

[0088] The term "or" in the present disclosure means inclusive "or" rather than exclusive "or". The mention of a "first" component does not necessarily require the provision of a "second" component. In addition, unless explicitly indicated, the "first" or "second" component does not imply limiting the mentioned components to a specific order. The term "based on" means "at least partially based on".

[0089] The embodiments of the present disclosure have been described above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present disclosure, those of ordinary skill in the art can also make many forms without departing from the purpose of the present disclosure and the scope protected by the claims, and all belong to the protection scope of the present disclosure.

Claims

1. A rotating mirror, characterized in that: The rotating mirror comprises: Rotating mirror base, matting piece, motor, rotating mirror bracket and rotating mirror reflector; The rotating mirror base includes a mounting end surface, the motor is fixedly connected to the mounting end surface, the rotating mirror bracket is sleeved on the outside of the motor, and the output end of the motor is connected to the rotating mirror bracket to drive the rotating mirror bracket to rotate, and the rotating mirror reflector is fixedly connected to the outer side wall of the rotating mirror bracket; The matting piece covers a target area on the mounting end surface and is fixedly connected to the rotating mirror base, wherein the target area is other areas on the mounting end surface except for the area where the motor is located, and the end surface of the matting piece facing away from the mounting end surface is a matting surface, and the light reflectivity of the matting surface in the laser radar working band is lower than the light reflectivity of the mounting end surface in the laser radar working band.

2. The rotating mirror according to claim 1, characterized in that: The matte piece includes: a matte plate covering the mounting end surface, and a flange bent along the edge of the rotating mirror base toward one side of the rotating mirror base, the inner wall of the flange is provided with a protrusion, and the rotating mirror base is clamped between the protrusion and the matte plate.

3. The rotating mirror according to claim 2, characterized in that: The matte piece includes at least two flanges, and among the at least two flanges, adjacent flanges are arranged at an angle, and the inner wall of each flange is provided with at least one protrusion.

4. The rotating mirror according to claim 2, characterized in that: The flange includes an ear plate extending along a side away from the mounting end surface, and the protrusion is arranged on the inner wall of the ear plate.

5. The rotating mirror according to claim 1, characterized in that: The rotating mirror also includes a rotating shell, which is sleeved on the outside of the motor and covers the outer wall of the motor. The rotating mirror bracket is sleeved on the outside of the rotating shell, the output end of the motor is fixedly connected to the rotating shell, and the rotating shell is fixedly connected to the rotating mirror bracket.

6. The rotating mirror according to claim 1, characterized in that: The strength of the rotating mirror base is greater than that of the matte piece, and matte paint is sprayed on the matte surface.

7. The rotating mirror according to claim 1, characterized in that: The mounting end surface of the rotating mirror base is provided with a recessed area, the recessed area is provided with a first connecting hole, the axis of the first connecting hole is perpendicular to the mounting end surface, the matting piece includes a raised area corresponding to the recessed area, the raised area is embedded in the recessed area, and the raised area is provided with a second connecting hole coaxially arranged with the first connecting hole, and the matting piece is fixedly connected to the first connecting hole of the rotating mirror base through the second connecting hole.

8. The rotating mirror according to any one of claims 1 to 7, characterized in that: The matte piece is C-shaped.

9. A laser radar, characterized in that: The laser radar comprises: a radar base, a laser emitting board, a first emitting lens, a second emitting lens, a third emitting lens, a beam splitter, a filter, a first receiving lens, a second receiving lens, a reflector, a third receiving lens, a receiving chip and a rotating mirror as described in any one of claims 1 to 8; The radar base is provided with a laser emission path, and the laser emission plate, the first emission lens, the second emission lens, and the third emission lens are sequentially installed on the radar base along the laser emission path; The radar base is provided with a first laser receiving path, the filter, the first receiving lens, and the second receiving lens are sequentially installed on the radar base along the first laser receiving path, the beam splitter is installed on the radar base, and the beam splitter is located at the intersection of the laser emission path and the first laser receiving path; The radar base is provided with a second laser receiving path, the first laser receiving path is located between the second laser receiving path and the laser transmitting path, the third receiving lens and the receiving chip are sequentially installed on the radar base along the second laser receiving path, the reflector is installed on the radar base, and the reflector is located at the intersection of the first laser receiving path and the second laser receiving path; The rotating mirror is installed on the radar base, and is located on a side of the laser emission path away from the laser first receiving path, and the rotating mirror is adjacent to a light-transmitting area arranged on the radar base.

10. The laser radar according to claim 9, characterized in that: The target area includes: an area in the mounting end surface located between the rotating mirror reflector and the beam splitter.

Images