Optical-mechanical system

Abstract

The embodiment of the invention discloses an optical-mechanical system which comprises a light emitting assembly, a light receiving assembly and a light scanning assembly, the light scanning assembly comprises a first light scanning element and a second light scanning element, and the first light scanning element and the second light scanning element are arranged in the first linear direction. One of the light emitting assembly and the light receiving assembly is located on the side, away from the second light scanning element, of the first light scanning element, and the other one of the light emitting assembly and the light receiving assembly is located on the side, away from the first light scanning element, of the second light scanning element. According to the embodiment of the invention, the transmission paths of the transmitted optical signal and the echo optical signal can be prolonged, so that the light divergence angle is reduced, and the ranging performance of an optical-mechanical system is improved; and the light emitting assembly and the light receiving assembly can be separated in space, so that heat dissipation of the light emitting assembly and the light receiving assembly is facilitated. According to the optical-mechanical system provided by the embodiment of the invention, the passing rate of the optical-mechanical system during the 85 DEG C test of the vehicle gauge can be improved on the basis of realizing long distance measurement and high resolution, and the product yield is improved.

Description

[0001] This application is a divisional application. The application number of the original application is 202210468849.6, and the filing date of the original application is April 29, 2022. The entire contents of the original application are incorporated into this application by reference. Technical Field

[0002] The present application relates to the field of optical technology, and in particular to an optical-mechanical system. Background Art

[0003] Optical-mechanical system refers to a device that sends out a light signal to a target in the external space, then receives the target's echo light signal, and obtains information such as the target distance by analyzing and comparing the transmitted light signal and the echo light signal. It has been widely used because its data is real-time, stable, and rich. However, in related technologies, the heat dissipation performance of the optical-mechanical system is poor, and the product pass rate during the heat dissipation performance test is low. Summary of the invention

[0004] The embodiment of the present application provides an optical-mechanical system for solving the problem of low product pass rate of the optical-mechanical system in the related art when performing heat dissipation performance testing. The technical solution is as follows;

[0005] In a first aspect, an embodiment of the present application provides an optical-mechanical system, comprising:

[0006] A light emitting component, used for emitting a light signal to a target object;

[0007] A light receiving component, used for receiving an echo light signal reflected by the target object;

[0008] The optical scanning component comprises a first optical scanning element and a second optical scanning element, wherein the optical transmission signal emitted by the optical transmitting component is sequentially transmitted through the first optical scanning element and the second optical scanning element and then emitted to the target object, and the echo optical signal reflected by the target object is sequentially transmitted through the second optical scanning element and the first optical scanning element and then reaches the optical receiving component;

[0009] Along the first straight line direction, one of the light emitting component and the light receiving component is located on the side of the first light scanning element away from the second light scanning element, and the other of the light emitting component and the light receiving component is located on the side of the second light scanning element away from the first light scanning element.

[0010] The optical-mechanical system of the embodiment of the present application distributes the optical emitting component and the optical receiving component roughly along the first straight line direction on opposite sides of the optical scanning component. On the one hand, it can extend the transmission path of the transmitted optical signal and the echo optical signal, so that the light divergence angle is reduced and the ranging performance of the optical-mechanical system is improved; on the other hand, it can separate the optical emitting component from the optical receiving component in space, which is beneficial to the heat dissipation of the optical emitting component and the optical receiving component. The optical-mechanical system of the embodiment of the present application separates the optical emitting component from the optical receiving component in space, which can improve the pass rate of the optical-mechanical system when performing the automotive-standard 85°C test on the basis of achieving long-range high-resolution, thereby improving the product yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0012] Figure 1 is a structural schematic diagram of an optical-mechanical system provided by a first embodiment of the present application;

[0013] Figure 2 is a structural schematic diagram of an optical-mechanical system provided by a second embodiment of the present application;

[0014] Figure 3 is a structural schematic diagram of an optical-mechanical system provided by a third embodiment of the present application;

[0015] Figure 4 is a structural schematic diagram of an optical-mechanical system provided by a fourth embodiment of the present application;

[0016] Figure 5 is a structural schematic diagram of an optical-mechanical system provided in a fifth embodiment of the present application;

[0017] Figure 6 is a structural schematic diagram of an optical-mechanical system provided by a sixth embodiment of the present application;

[0018] Figure 7 is a structural schematic diagram of an optical-mechanical system provided by a seventh embodiment of the present application;

[0019] Figure 8 is a three-dimensional cross-sectional schematic diagram of a partial structure of an optical-mechanical system provided in an eighth embodiment of the present application;

[0020] Fig. 9 yes Figure 8 A schematic diagram of the three-dimensional structure of the optical-mechanical system shown;

[0021] Fig.10is an exploded schematic diagram of a light receiving component in an optical-mechanical system provided in an eighth embodiment of the present application;

[0022] Fig.11 yes Figure 8 A magnified schematic diagram of the structure at center A;

[0023] Fig.12 yes Figure 8 A three-dimensional schematic diagram of the extinction fin in the optomechanical system is shown.

[0024] Description of the drawings: 1. Optical system; 10. Optical transmitting component; 20. Optical receiving component; 21. Optical receiver; 22. Receiving board; 221. Third board surface; 222. Fourth board surface; 23. Receiving shielding cover; 231. First through hole; 232. First sub-shielding cover; 233. Second sub-shielding cover; 24. Blocking ring; 25. Filter; 261. First stray light channel; 262. Second stray light channel; 30. Optical scanning component; 31. First optical scanning Element; 311, galvanometer; 3111, first reflective surface; 32, second light scanning element; 321, rotating mirror; 3211, second reflective surface; 40, first light path conversion component; 41, first reflective element; 411, one of the first emitting mirrors; 412, another first reflective element; 50, second light path conversion component; 51, second reflective element; 511, one of the second reflective elements; 512, another second reflective element; 60, light collimation component Component; 61, fast axis collimator; 62, slow axis collimator; 70, spacer; 71, emission light channel; 711, first light inlet; 712, first light outlet; 72, echo light channel; 721, second light inlet; 722, second light outlet; 73, enclosure; 732, first plate; 7324, avoidance interval; 75, first cover plate; 76, second cover plate; 80, housing; 81, first accommodating cavity; 82, first plate; 821, inner plate surface; 83 , box body; 84, cover body; 85, baffle; 91, main board; 911, fifth board surface; 912, sixth board surface; 92, electronic control board; 942, second heat-conducting member; 9421, first sub-heat-conducting member; 9422, second sub-heat-conducting member; 9423, third sub-heat-conducting member; 943, light-blocking plate; 944, matte fins; 9441, matte tube; 9442, carrier board; m, first straight line direction; n, second straight line direction; p, first rotation axis; q, second rotation axis. DETAILED DESCRIPTION

[0025] In order to make the objectives, technical solutions and advantages of the present application more clear, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

[0026] When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are only examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.

[0027] See also Figure 1 The embodiment of the present application provides an optical-mechanical system 1. The optical-mechanical system 1 may be a laser radar, etc. The optical-mechanical system 1 may be used for navigation and obstacle avoidance of products such as automobiles, robots, logistics vehicles, and inspection vehicles, and realize functions such as obstacle recognition, distance measurement, speed measurement, and automatic driving, which are not limited in the embodiment of the present application.

[0028] Specifically, the optical-mechanical system 1 includes an optical transmitting component 10 and an optical receiving component 20, wherein the optical transmitting component 10 is used to send an optical signal to the target object, and the optical receiving component 20 is used to receive an echo optical signal reflected by the target object. The echo optical signal is compared with the transmitted optical signal, and after appropriate processing, information such as the distance to the target object can be obtained.

[0029] In the embodiment of the present application, the optical-mechanical system 1 further includes an optical scanning component 30, which can be used to transmit the transmission light signal emitted by the optical-transmitting component 10 to multiple directions. The optical scanning component 30 can also be used to transmit the echo light signals in multiple directions to the optical-receiving component 20, thereby improving the detection field of view of the optical-mechanical system 1 and realizing the distance detection between the target objects in different directions and the optical-mechanical system 1. Specifically, the optical scanning component 30 can include a first optical scanning element 31 and a second optical scanning element 32. The transmission light signal emitted by the optical-transmitting component 10 is sequentially transmitted through the first optical scanning element 31 and the second optical scanning element 32 and then emitted to the target object. The echo light signal reflected by the target object is sequentially transmitted through the second optical scanning element 32 and the first optical scanning element 31 and then reaches the optical-receiving component 20. The first optical scanning element 31 and the second optical scanning element 32 are used in conjunction with each other to realize the transmission of the transmission light signal to multiple directions and / or the reception of the echo light signals in multiple directions.

[0030] Optionally, along the first straight direction m, one of the optical emitting component 10 and the optical receiving component 20 is located on the side of the first optical scanning element 31 away from the second optical scanning element 32, and the other of the optical emitting component 10 and the optical receiving component 20 is located on the side of the second optical scanning element 32 away from the first optical scanning element 31. The optical emitting component 10 and the optical receiving component 20 are distributed on opposite sides of the optical scanning component 30 roughly along the first straight direction m. On the one hand, the transmission path of the transmitted optical signal and the echo optical signal can be extended, so that the light divergence angle is reduced and the ranging performance of the optical-mechanical system 1 is improved; on the other hand, the optical emitting component 10 and the optical receiving component 20 can be separated in space, which is beneficial to the heat dissipation of the optical emitting component 10 and the optical receiving component 20.

[0031] It should be noted that for the long-range and high-resolution optomechanical system 1, the heat generation of the light emitting component 10 and the light receiving component 20 is relatively serious and usually cannot pass the automotive standard 85°C test. However, the optomechanical system 1 of the embodiment of the present application separates the light emitting component 10 and the light receiving component 20 in space, which can improve the pass rate of the optomechanical system 1 when performing the automotive standard 85°C test on the basis of achieving long-range and high-resolution, thereby improving the product yield.

[0032] Among them, the transmission path of the transmitted optical signal and the echo optical signal is extended, which is conducive to reducing the divergence angle and improving the ranging capability of the optical-mechanical system 1. Specifically, the optical-mechanical system 1 satisfies the following conditional formula 1: Among them, SNR is the signal-to-noise ratio of the echo optical signal, P t is the total output power, A rec Receiving cross section, A FOV is the receiving field of view angle. From the above conditional formula 1, it can be seen that the receiving field of view angle A FOV The size of the echo light signal will determine the size of the noise, and the receiving field of view angle A FOV The larger the received noise is, the greater the receiving field of view A needs to be reduced. FOV The receiving field of view is A FOV It is related to the size of the light receiver 21 in the light receiving assembly 20 and the focal length of the receiving lens; for example, if the divergence angle δθ is 0.2°*0.2°, the size of the light receiver 21 or the focal length of the receiving lens can be customized so that the receiving field angle A FOV Slightly greater than 0.2°*0.2°, to ensure that all echo light signals can be received by the optical receiver 21, to avoid light signal loss; combined with the following conditional formula 2 of the optical-mechanical system 1: δθ=L / f, where δθ is the divergence angle of the emitted light signal, L is the light-emitting area of ​​the light-emitting component 10, and f is the focal length of the emission lens in the light-emitting component 10. It can be seen from the above conditional formula 2 that the telephoto system can achieve a reduction in the light divergence angle δθ, and after the light divergence angle δθ is reduced, the receiving field angle A can be reduced. FOVIt is made very small to reduce noise, thereby improving the detection capability of the optical-mechanical system 1. In addition, the transmission path of the transmitted optical signal and the echo optical signal is extended, which can also reduce the crosstalk between channels.

[0033] Among them, the transmission path of the transmitted light signal and the echo light signal is extended, which is beneficial to reduce the noise received by the optical receiver 21 and improve the ranging capability of the optical system 1. Specifically, due to processing tolerance or cost reasons, the photosensitive surface of the optical receiver 21 is generally around 0.5mm. For a system with a small divergence angle, the short focal length design will cause a large redundancy in the receiving field angle corresponding to the 0.5mm photosensitive surface, which increases the received noise. The focal length of the optical system 1 of the present application can be above 50mm to reduce the receiving field angle.

[0034] It should be noted that, along the first straight line direction m, one of the light emitting component 10 and the light receiving component 20 is located on the side of the first light scanning element 31 away from the second light scanning element 32, and the other of the light emitting component 10 and the light receiving component 20 is located on the side of the second light scanning element 32 away from the first light scanning element 31. It can be that along the first straight line direction m, the light emitting component 10 is located on the side of the first light scanning element 31 away from the second light scanning element 32, and the light receiving component 20 is located on the side of the second light scanning element 32 away from the first light scanning element 31; it can also be that along the first straight line direction m, the light receiving component 20 is located on the side of the first light scanning element 31 away from the second light scanning element 32, and the light emitting component 10 is located on the side of the second light scanning element 32 away from the first light scanning element 31, and the embodiment of the present application does not limit this. The following will take "along the first straight line direction m, the light receiving component 20 is located on the side of the first light scanning element 31 away from the second light scanning element 32, and the light emitting component 10 is located on the side of the second light scanning element 32 away from the first light scanning element 31" as an example for exemplary description.

[0035] It should be noted that “along the first straight direction m, the light emitting component 10 is located on the side of the second light scanning element 32 away from the first light scanning element 31”, which can mean that the light emitting component 10, the first light scanning element 31 and the second light scanning element 32 are all approximately on the same straight line and the light emitting component 10 is located on the side of the second light scanning element 32 away from the first light scanning element 31, or the projection of the light emitting component 10, the first light scanning element 31 and the second light scanning element 32 on the same straight line satisfies: the light emitting component 10 is located on the side of the second light scanning element 32 away from the first light scanning element 31, so as to reduce the assembly accuracy requirements of the light emitting component 10, the first light scanning element 31 and the second light scanning element 32, and reduce the difficulty of assembly.

[0036] Along the first straight line direction m, the light emitting component 10 is located on the side of the second light scanning element 32 away from the first light scanning element 31, and the light emission signal emitted by the light emitting component 10 may be blocked by the second light scanning element 32 when reaching the side of the first light scanning element 31 close to the second light scanning element 32. In this regard, the optical mechanical system 1 of the embodiment of the present application may further include a first light path conversion component 40, and the first light path conversion component 40 is arranged between the light emitting component 10 and the first light scanning element 31 along the transmission path of the light emission signal. The arrangement of the first light path conversion component 40 changes the transmission path of the light emission signal emitted by the light emitting component 10 from sequentially passing through the first light scanning element 31 and the second light scanning element 32 to sequentially passing through the first light path conversion component 40, the first light scanning element 31 and the second light scanning element 32, so that the light emission signal is not blocked by the second light scanning element 32 in the process of reaching the first light path conversion component 40 from the light emitting component 10 and in the process of reaching the first light scanning element 31 from the first light path conversion component 40, thereby ensuring the normal transmission of the light emission signal.

[0037] Optionally, the first optical path conversion component 40 includes at least one first reflecting element 41, and the transmission path of the transmitted light signal can be deflected by the reflecting surface of the first reflecting element 41, ensuring that the transmitted light signal can be smoothly transmitted to the side of the first optical scanning element 31 close to the second optical scanning element 32.

[0038] Optionally, along the second straight line direction n, the light emitting assembly 10 may be located on a side of the light scanning assembly 30 that is away from the target object, as shown in FIG. Figure 1 The light emitting component 10 may also be located on the side of the light scanning component 30 close to the target object, see Figure 2 , the second straight line direction n intersects with the first straight line direction m. Figure 1 , when the light emitting component 10 is located on the side of the light scanning component 30 away from the target object along the second straight direction n, optionally, among all the first reflective elements 41 of the first light path conversion component 40, one of the first reflective elements 411 can be distributed along the second straight direction n with the first light scanning element 31 and located on the side of the first light scanning element 31 away from the target object. In the embodiment of the present application, one of the first reflective elements 411 is labeled 411, which is convenient for distinguishing from the labels 41 of other first reflective elements 41 when the first light path conversion component 40 includes multiple first reflective elements 41. It should be noted that, at this time, the first light path conversion component 40 may also include only one first reflective element 41.

[0039] Combination Figure 2, when the light emitting assembly 10 is located on the side of the light scanning assembly 30 close to the target object along the second straight direction n, optionally, among all the first reflecting elements 41, one of the first reflecting elements 411 can be distributed with the first light scanning element 31 along the second straight direction n and located on the side of the first light scanning element 31 away from the target object, another first reflecting element 412 can be distributed with the second light scanning element 32 along the second straight direction n and located on the side of the second light scanning element 32 away from the target object, and along the transmission path of the emitted light signal, another first reflecting element 412 is located between the light emitting assembly 10 and one of the first reflecting elements 411. In the embodiment of the present application, one of the first reflecting elements 411 is labeled as 411, and another of the first reflecting elements 412 is labeled as 412 for the sake of distinction.

[0040] Among them, the reflective element 41 can also be replaced by a refractive element, etc. The embodiment of the present application does not limit the specific structural design of the first optical path conversion component 40.

[0041] It should be noted that the above-mentioned statement “along the first straight direction m, the light receiving component 20 is located on the side of the first light scanning element 31 away from the second light scanning element 32” can mean that the light receiving component 20, the first light scanning element 31 and the second light scanning element 32 are all approximately on the same straight line and the light receiving component 20 is located on the side of the first light scanning element 31 away from the second light scanning element 32. It can also mean that the projection of the light receiving component 20, the first light scanning element 31 and the second light scanning element 32 on the same straight line satisfies: the light receiving component 20 is located on the side of the first light scanning element 31 away from the second light scanning element 32, so as to reduce the assembly accuracy requirements of the light receiving component 20, the first light scanning element 31 and the second light scanning element 32 and reduce the difficulty of assembly.

[0042] Along the first straight line direction m, the light receiving component 20 is located on the side of the first light scanning element 31 away from the second light scanning element 32. The echo light signal may be obstructed by the first light scanning element 31 in the process of reaching the light receiving component 20 from the side of the first light scanning element 31 close to the second light scanning element 32. In this regard, the optical-mechanical system 1 of the embodiment of the present application may further include a second light path conversion component 50. Along the transmission path of the echo light signal, the second light path conversion component 50 is arranged between the light receiving component 20 and the first light scanning element 31. The arrangement of the second light path conversion component 50 allows the transmission path of the echo light signal to be changed from reaching the light receiving component 20 after passing through the first light scanning element 31 to reaching the light receiving component 20 after passing through the first light scanning element 31 and the second light path conversion component 50. This can achieve that the echo light signal is not obstructed by the first light scanning element 31 in the process of reaching the second light path conversion component 50 from the first light scanning element 31 and in the process of reaching the light receiving component 20 from the second light path conversion component 50, thereby ensuring the normal transmission of the echo light signal.

[0043] Optionally, the second optical path conversion component 50 includes at least one second reflecting element 51 , and the transmission path of the echo optical signal can be deflected by the reflecting surface of the second reflecting element 51 , thereby ensuring that the echo optical signal can be smoothly transmitted to the optical receiving component 20 .

[0044] Optionally, along the second straight line direction n, the light receiving component 20 may be located on a side of the light scanning component 30 that is away from the target object, as shown in FIG. Figure 1 and Figure 2 The light receiving component 20 may also be located on the side of the light scanning component 30 close to the target object, see Figure 3 and Figure 4 . Combined Figure 1 and Figure 2 , when the light receiving component 20 is located on the side of the light scanning component 30 away from the target object along the second straight direction n, optionally, among all the second reflective elements 51 included in the second optical path conversion component 50, one of the second reflective elements 511 can be distributed along the second straight direction n with the first optical scanning element 31 and be located on the side of the first optical scanning element 31 away from the target object. In the embodiment of the present application, one of the second reflective elements 511 is labeled as 511, which is convenient for distinguishing from the labels 51 of other second reflective elements 51 when the second optical path conversion component 50 includes multiple second reflective elements 51. It should be noted that, at this time, the second optical path conversion component 50 may also include only one second reflective element 51.

[0045] Combination Figure 3 and Figure 4, when the light receiving component 20 is located on the side of the light scanning component 30 close to the target object along the second straight direction n, optionally, among all the second reflecting elements 51, one of the second reflecting elements 511 can be distributed with the first light scanning element 31 along the second straight direction n and located on the side of the first light scanning element 31 away from the target object, another second reflecting element 512 can also be distributed with the first light scanning element 31 along the second straight direction n and located on the side of the first light scanning element 31 away from the target object, and one of the second reflecting elements 511 is located between another second reflecting element 512 and the second light scanning element 32 along the first straight direction m, and another second reflecting element 512 is located between one of the second reflecting elements 511 and the light receiving component 20 along the transmission path of the echo optical signal. In the embodiment of the present application, one of the second reflecting elements 511 is labeled as 511, and another of the second reflecting elements 512 is labeled as 512 for easy distinction.

[0046] Optionally, along the second straight line direction n, when one of the first reflecting elements 411 is located between one of the second reflecting elements 511 and the first light scanning element 31, in order to prevent one of the first reflecting elements 411 from obstructing the echo light signal from the first light scanning element 31 to reach one of the second reflecting elements 511, one of the first reflecting elements 411 can be provided with a first light-through hole (not shown in the figure), so that the echo light signal can reach one of the second reflecting elements 511 after passing through the first light-through hole.

[0047] Optionally, see Figure 5 , along the second straight line direction n, when one of the second reflecting elements 511 is located between one of the first reflecting elements 411 and the first light scanning element 31, in order to prevent one of the second reflecting elements 511 from obstructing the emitted light signal from reaching the first light scanning element 31, one of the second reflecting elements 511 can be provided with a second light-through hole (not shown in the figure), so that the emitted light signal can pass through the second light-through hole to reach the first light scanning element 31.

[0048] Optionally, the emission position of the transmitted light signal and the incident position of the echo light signal can be approximately located in the middle of the optomechanical system 1, so as to facilitate the calibration of the optomechanical system 1 and the symmetry of the close-range point cloud. It should be noted that by appropriately adjusting the positions of the optical transmitting component 10, the optical receiving component 20, the first optical scanning element 31 and the second optical scanning element 32 along the first straight line direction m, the emission position of the transmitted light signal and the incident position of the echo light signal can be approximately located in the middle of the optomechanical system 1.

[0049] When the optomechanical system 1 of the embodiment of the present application is used in autonomous driving, it can achieve a detection capability of 250m@10% and a resolution capability of less than 0.1°, meeting the requirements of high-precision imaging.

[0050] It should be noted that those skilled in the art should be aware that the positions of the optical emitting component 10 and the optical receiving component 20 in all the drawings of the embodiments of the present application can be swapped.

[0051] Both the first light scanning element 31 and the second light scanning element 32 may adopt a reflective structure; for example, the first light scanning element 31 may adopt a galvanometer or a rotating mirror, and the second light scanning element 32 may adopt a galvanometer or a rotating mirror. In the embodiment of the present application, the first light scanning element 31 includes a galvanometer 311, and the second light scanning element 32 includes a rotating mirror 321. Specifically, the galvanometer 311 has a first reflecting surface 3111 for transmitting the emission light signal and / or the echo light signal, the galvanometer 311 can rotate around the first rotation axis p, and the first reflecting surface 3111 faces the second light scanning element 32. The rotating mirror 321 has a plurality of second reflecting surfaces 3211 for transmitting the emission light signal and / or the echo light signal, the rotating mirror 321 can rotate around the second rotation axis q, and the plurality of second reflecting surfaces 3211 are arranged around the periphery of the second rotation axis q, so that when the rotating mirror 321 rotates around the second rotation axis q, at least one second reflecting surface 3211 faces the first reflecting surface 3111 of the first light scanning element 31.

[0052] The reflective surface (eg, the first reflective surface 3111 and the second reflective surface 3211 ) can reflect the optical signal (eg, the transmitted optical signal and the echo optical signal), and change the transmission direction of the optical signal so that the optical signal can be smoothly transmitted backward.

[0053] Optionally, the first rotation axis p can be perpendicular to the second rotation axis q. The rotation of the galvanometer 311 around the first rotation axis p can adjust the field of view angle in one direction, and the rotation of the rotating mirror 321 around the second rotation axis q can adjust the field of view angle in another direction. When the first rotation axis p is perpendicular to the second rotation axis q, the two field of view angle adjustment directions can be perpendicular. For example, the galvanometer 311 can be rotated around the first rotation axis p to adjust the longitudinal field of view angle, and the rotating mirror 321 can be rotated around the second rotation axis q to adjust the transverse field of view angle. In an embodiment of the present application, the rotating mirror 321 can scan a transverse field of view angle of 120°, and the galvanometer 311 can scan a longitudinal field of view angle of 25°, so as to complete a 120°*25° scan of the full field of view angle space.

[0054] Optionally, the optical-mechanical system 1 further includes an optical collimation component 60, which is located between the optical emission component 10 and the first optical scanning element 31 along the transmission path of the emitted light signal. The setting of the optical collimation component 60 can enable the emitted light signal emitted by the optical-mechanical system 1 to maintain a higher power density when irradiating a distant target object. Further optionally, the optical collimation component 60 includes a fast-axis collimator 61 and a slow-axis collimator 62, wherein the fast-axis collimator 61 is located between a first reflecting element 41 and the optical emission component 10, and the slow-axis collimator 62 is located between a first reflecting element 41 and the first optical scanning element 31. The fast-axis collimator 61 and the slow-axis collimator 62 can collimate the fast and slow axes, enhance the collimation effect, and improve the output brightness of the emitted light signal.

[0055] Optionally, see Figure 6 The optical-mechanical system 1 further includes an isolator 70, which is formed with an emission light channel 71 and an echo light channel 72. The emission light channel 71 is used to transmit the emission light signal, reducing or even avoiding the interference of stray light on the emission light signal; the echo light channel 72 is used to transmit the echo light signal, reducing or even avoiding the interference of stray light on the echo light signal.

[0056] Specifically, the emission light channel 71 has a first light inlet 711 and a first light outlet 712, the light emitting component 10 is arranged corresponding to the first light inlet 711, and the first light scanning element 31 is arranged corresponding to the first light outlet 712, so that the emission light signal emitted by the light emitting component 10 can enter the emission light channel 71 in time, and reach the first light scanning element 31 after being transmitted in the emission light channel 71, so as to reduce or even avoid the interference of stray light.

[0057] The echo optical channel 72 has a second light inlet 721 and a second light outlet 722. The first light scanning element 31 is also arranged corresponding to the second light inlet 721, and the light receiving component 20 is arranged corresponding to the second light outlet 722, so that the echo optical signal transmitted by the first light scanning element 31 can enter the echo optical channel 72 in time, and reach the light receiving component 20 after being transmitted in the echo optical channel 72, so as to reduce or even avoid the interference of stray light.

[0058] Optionally, at least part of the transmission optical channel 71 can be separated from at least part of the echo optical channel 72, thereby improving the independence of the transmission optical channel 71 and the echo optical channel 72 and reducing the crosstalk between the transmission optical signal and the received optical signal. It should be noted that the transmission optical channel 71 can be partially separated from the part of the echo optical channel 72, and the transmission optical channel 71 as a whole can also be separated from the echo optical channel 72 as a whole. This embodiment of the present application is not limited to this and can be flexibly adjusted according to specific needs.

[0059] Optionally, see Figure 7, the optical emitting component 10 and the optical receiving component 20 can both be connected and fixed to the isolation member 70 .

[0060] Optionally, the optical-mechanical system 1 further comprises a housing 80 , which forms a first accommodating cavity 81 , and the isolating member 70 , the optical emitting component 10 , the optical receiving component 20 , and the optical scanning component 30 can all be disposed in the first accommodating cavity 81 of the housing 80 .

[0061] Optionally, the isolation member 70 includes a surrounding plate 73, which forms an emission light channel 71 and an echo light channel 72. The surrounding plate 73 may include a first plate body 732, which forms a first light outlet 712 and a second light inlet 721. The first plate body 732 is recessed into the surrounding plate 73 to form an avoidance interval 7324, and the second light scanning element 32 is arranged in the avoidance interval 7324, so that the structure of the optical-mechanical system 1 is more compact, thereby realizing the miniaturized design of the optical-mechanical system 1.

[0062] Optionally, see Figure 8 The isolating member 70 further includes a first cover plate 75 and a second cover plate 76, which are respectively located on opposite sides of the enclosure 73 and connected to the enclosure 73, so as to form an emission light channel 71 and an echo light channel 72 together with the enclosure 73, so that the light shielding performance of the emission light channel 71 and the echo light channel 72 is better, and the interference of stray light on the emission light signal and the echo light signal is reduced. Optionally, the connection method between the first cover plate 75, the second cover plate 76 and the enclosure 73 can be arbitrary, for example, it can be a snap connection, adhesive connection, etc., and the embodiment of the present application does not limit this. Optionally, in the embodiment of the present application, the first cover plate 75 and the enclosure 73 can be directly constructed as an integrally formed structure, and the second cover plate 76 and the enclosure 73 can be snap-connected through a slot, an insert, or the like.

[0063] Optionally, the optical-mechanical system 1 also includes a main board 91, which can be disposed in the first accommodating cavity 81 of the shell 80. The main board 91 is electrically connected to the optical emitting component 10, and is used to control the optical emitting component 10 to transmit an optical signal to the target object; the main board 91 is also electrically connected to the optical receiving component 20, and is used to control the optical receiving component 20 to receive the echo optical signal reflected by the target object.

[0064] Optionally, the optical-mechanical system 1 further includes an electric control board 92, which can be disposed in the first accommodating cavity 81 of the housing 80. The electric control board 92 is separately disposed from the main board 91 and is electrically connected to the main board 91. The electric control board 92 is also electrically connected to the first optical scanning element 31 to control the movement of the first optical scanning element 31. The electric control board 92 is also electrically connected to the second optical scanning element 32 to control the movement of the second optical scanning element 32. For example, when the first optical scanning element 31 includes a galvanometer 311, the electric control board 92 can be electrically connected to the galvanometer 311 and used to control the galvanometer 311 to rotate around the first rotation axis p. When the second optical scanning element 32 includes a rotating mirror 321, the electric control board 92 is electrically connected to the rotating mirror 321 and used to control the rotating mirror 321 to rotate around the second rotation axis q.

[0065] In the embodiment of the present application, the electric control board 92 and the main board 91 are separately arranged. Compared with an integrated arrangement, the heat dissipation performance of the optical-mechanical system 1 can be improved. When the product needs to be replaced or the customer needs are inconsistent, only the electric control board 92 can be disassembled and replaced, which can reduce the replacement cost and improve the replacement efficiency.

[0066] Optionally, the electric control board 92 and the main board 91 can be disposed on opposite sides of the optical scanning assembly 30 to increase the distance between the electric control board 92 and the main board 91 and improve the heat dissipation performance of the optical mechanical system 1. Optionally, the electric control board 92 can be disposed corresponding to the first optical scanning element 31.

[0067] Optionally, see Figure 8 and Fig. 9 The housing 80 may include a box body 83 and a cover body 84 connected to the box body 83. The box body 83 and the cover body 84 together define a first accommodating cavity 81. The electric control board 92 may be disposed near the cover body 84, and the main board 91 may be disposed near the bottom of the box body 83. Furthermore, a visible window corresponding to the electric control board 92 may be provided on the cover body 84, so that the staff can check the operation of the electric control board 92 and find out the fault in time when it occurs.

[0068] Optionally, the optical emission assembly 10 includes an optical emitter and an emission board, the optical emitter is mounted on the emission board and is electrically connected to the emission board, and the emission board is separated from the main board 91 and is electrically connected to the main board 91. Fig.10 and Fig.11 The optical receiving assembly 20 includes an optical receiver 21 and a receiving board 22. The optical receiver 21 is mounted on the receiving board 22 and is electrically connected to the receiving board 22. The receiving board 22 is separated from the main board 91 and is electrically connected to the main board 91. Separating the transmitting board, the receiving board 22 and the main board 91 can further improve the heat dissipation performance of the optical-mechanical system 1 and facilitate operations such as replacement of the transmitting board and the receiving board 22.

[0069] Optionally, the optical-mechanical system 1 further includes an interface board, which is provided separately from the main board 91 and is electrically connected to the main board 91, and is used to provide a power supply signal for at least one of the optical emitting component 10, the optical receiving component 20, the first optical scanning element 31, and the second optical scanning element 32. Since the user's interface requirements may be inconsistent, the interface board is provided separately from the main board 91, which can facilitate the replacement or maintenance of the interface board and can further improve the heat dissipation performance of the optical-mechanical system 1.

[0070] Preferably, the main board 91, the electronic control board 92, the transmitting board, the receiving board 22 and the interface board are all separately arranged, so that when the product needs to be replaced or the user needs are inconsistent, only part of the board circuit needs to be updated and redesigned, which saves cost and time and has a better heat dissipation effect.

[0071] Optionally, the emitting board includes a substrate and a conductive layer disposed on the substrate. The substrate may be a board with good heat dissipation performance, for example, the substrate may be a ceramic board.

[0072] Optionally, a first heat conductor is provided between the launch board and the housing 80. Further optionally, the launch board has a first board surface and a second board surface opposite to the first board surface, the light emitter is mounted on the first board surface, and a first heat conductor is provided between the second board surface and the isolation member 70, so that the heat generated by the launch board can be transferred to the isolation member 70 through the first heat conductor, and then transferred to the housing 80 by the isolation member 70, and then dissipated outward. The first heat conductor may include a graphene layer and a thermally conductive gel layer.

[0073] Optionally, a second heat conducting member 942 is disposed between the receiving plate 22 and the housing 80 . Further optionally, the optical receiving component 20 also includes a receiving shielding cover 23 that covers the optical receiver 21 and the receiving board 22, the receiving shielding cover 23 is provided with a first through hole 231 corresponding to the optical receiver 21, the receiving board 22 has a third board surface 221 and a fourth board surface 222 opposite to the third board surface 221, the third board surface 221 is installed with the optical receiver 21, a first sub-heat conductive member 9421 is provided between the third board surface 221 and the receiving shielding cover 23, a second sub-heat conductive member 9422 is provided between the fourth board surface 222 and the receiving shielding cover 23, a third sub-heat conductive member 9423 is provided between the receiving shielding cover 23 and the isolation member 70, the second heat conductive member 942 includes a first sub-heat conductive member 9421, a second sub-heat conductive member 9422 and a third sub-heat conductive member 9423, so that the heat generated by the receiving board 22 can be transferred to the isolation member 70 through the second heat conductive member 942, and then transferred to the shell 80 by the isolation member 70, and then dissipated outward. The first sub-heat-conducting member 9421 and the second sub-heat-conducting member 9422 may both include a thermally conductive gel layer, and the third sub-heat-conducting member 9423 includes a graphene layer and a thermally conductive gel layer.

[0074] Optionally, the receiving shielding cover 23 may include a first sub-shielding cover 232 located on the side where the third board surface 221 is located and a second sub-shielding cover 233 located on the side where the fourth board surface 222 is located, and the first sub-shielding cover 232 and the second sub-shielding cover 233 are both connected to the receiving board 22 .

[0075] Optionally, a third heat-conducting member is provided between the main board 91 and the housing 80, so that the heat generated by the main board 91 can be directly dissipated to the outside of the housing 80 through the third heat-conducting member. Optionally, a fourth heat-conducting member is provided between the electric control board 92 and the housing 80, so that the heat generated by the electric control board 92 can be directly dissipated to the outside of the housing 80 through the fourth heat-conducting member. Optionally, a fifth heat-conducting member is provided between the interface board and the housing 80, so that the heat generated by the interface board can be directly dissipated to the outside of the housing 80 through the fifth heat-conducting member. Optionally, a sixth heat-conducting member is provided between the isolating member 70 and the housing 80, so that the heat generated by the transmitting board and the heat generated by the receiving board 22 can be dissipated to the outside of the housing 80 through the sixth heat-conducting member on the isolating member 70.

[0076] Optionally, the third heat-conducting member, the fourth heat-conducting member, the fifth heat-conducting member and the sixth heat-conducting member all include a heat-conducting gel layer.

[0077] Optionally, refer again to Figure 8 The housing 80 includes a first plate 82, the first plate 82 has an inner plate surface 821 forming a first accommodating cavity 81, the inner plate surface 821 includes a first area, the main board 91 is arranged corresponding to the first area, the isolating member 70 is located in the first accommodating cavity 81 and is arranged on the side of the main board 91 away from the inner plate surface 821, the isolating member 70 covers at least part of the main board 91, and the isolating member 70 and the first plate 82 are both metal parts. The isolating member 70 and the first plate 82 are designed to be made of metal parts, so as to form an electromagnetic shielding structure of the main board 91, shield the electromagnetic radiation outside the isolating member 70 and the first plate 82 from affecting the main board 91, and at the same time prevent the interference generated by the main board 91 during operation from propagating to the outside of the isolating member 70 and the first plate 82. Compared with the related art in which the housing 80 is directly made of metal parts to form the electromagnetic shielding structure of the whole machine, the electromagnetic interference between the internal components such as the optical transmitting component 10 and the optical receiving component 20 in the housing 80 and the main board 91 can be avoided.

[0078] It should be noted that, except for the first plate 82 being made of metal, the entire housing 80 can also be made of metal to ensure the electromagnetic shielding performance of the entire device.

[0079] Optionally, the first cover plate 75 is disposed between the second cover plate 76 and the first plate 82. The above-mentioned "isolator 70 is a metal member" may mean that only the first cover plate 75 is a metal member, or the isolator 70 as a whole is a metal member. When only the first cover plate 75 is a metal member, the isolator 70 may be formed by a combination of metal members and non-metal members to reduce the overall weight of the isolator 70 and reduce the manufacturing cost; for example, the isolator 70 may be formed by a two-color injection molding process of metal members and non-metal members, or may be formed by mechanical assembly of metal members and non-metal members.

[0080] Optionally, the main board 91 includes a fifth board surface 911 facing the first board 82 and a sixth board surface 912 opposite to the fifth board surface 911. The first board 82 can cover the entire fifth board surface 911, and the isolation member 70 can cover a portion of the sixth board surface 912 or the entire sixth board surface 912. When the isolation member 70 covers a portion of the sixth board surface 912, the isolation member 70 can cover the area where the electronic components on the sixth board surface 912 are located, and expose the area where the electrical interface on the sixth board surface 912 is located, so as to achieve both improving the electromagnetic shielding performance at the electronic components and satisfying the normal electrical connection between the main board 91 and other components.

[0081] Optionally, the optical transmitting assembly 10 further includes an emission shielding cover, the emission shielding cover covers the optical transmitter, and the emission shielding cover is provided with a second through hole for allowing the emission light signal emitted by the optical transmitter to pass through. The provision of the emission shielding cover can make it difficult for the electromagnetic signal generated by the optical transmitting assembly 10 to crosstalk with the electromagnetic signal generated by the mainboard 91. Similarly, when the optical receiving assembly 20 includes the receiving shielding cover 23, the receiving shielding cover 23 can make it difficult for the electromagnetic signal generated by the optical receiving assembly 20 to crosstalk with the electromagnetic signal generated by the mainboard 91.

[0082] Optionally, the inner panel 821 further includes a second area connected to the first area, and the light emitting assembly 10 is arranged corresponding to the second area; and / or, the inner panel 821 further includes a third area connected to the first area, and the light receiving assembly 20 is arranged corresponding to the third area. The light emitting assembly 10, the light receiving assembly 20, the main board 91, and the isolation member 70 covering the main board 91 are distributed at different positions on the inner panel 821, which makes assembly more convenient, and the overall layout is reasonable, which is conducive to improving the space utilization rate of the optical-mechanical system 1.

[0083] Optionally, the inner panel 821 also includes a fourth area connected to the first area, and the optical scanning component 30 is arranged corresponding to the fourth area, so that the optical scanning component 30 and the isolation member 70 covering the main board 91 are distributed at different positions on the inner panel 821 for easy assembly.

[0084] Please refer again Figure 7The optical-mechanical system 1 further includes a light shielding plate 943, which is located in the first accommodating cavity 81 and is disposed on a side of the second optical scanning element 32 close to the isolating element 70, one end of the light shielding plate 943 is located between the second optical scanning element 32 and the first optical scanning element 31, and the other side extends toward the direction of the second optical scanning element 32 away from the first optical scanning element 31 and is connected to the housing 80. The light shielding plate 943 is combined with the isolating element 70 to further improve the anti-interference performance of the transmitted optical signal and / or the echo optical signal during the transmission process.

[0085] Optionally, the optical-mechanical system 1 further includes a matting fin 944, which is located in the first accommodating cavity 81 and is arranged corresponding to the first light outlet 712 and the second light inlet 721. The matting fin 944 can reflect the stray light multiple times, weaken the intensity of the stray light, and thus reduce the interference of the stray light on the optical signal of the working band.

[0086] Alternatively, see Figure 8 The extinction fin 944 is located on the side of the first cover plate 75 of the isolation member 70 away from the second cover plate 76 or on the side of the second cover plate 76 away from the first cover plate 75, so that the extinction fin 944 is not easy to enter the second light inlet 721 after multiple reflections of the stray light, and is not easy to interfere with the optical signal of the working band.

[0087] Optionally, the housing 80 includes a baffle 85, and the first cover plate 75 is located between the inner plate surface 821 and the second cover plate 76. The baffle 85 is located between the extinction fin 944 and the isolating member 70, and one end of the baffle 85 is connected to the inner plate surface 821 of the first plate 82, and the other end extends toward the direction close to the second cover plate 76. The surface of the baffle 85 away from the inner plate surface 821 is located on the side of the extinction fin 944 away from the inner plate surface 821, so as to further reduce the interference of stray light on the working band optical signal transmitted in the isolating member 70 through the baffle 85. Optionally, the surface of the baffle 85 away from the inner plate surface 821 is located on the side of the first cover plate 75 away from the inner plate surface 821.

[0088] Optionally, the extinction fin 944 includes a plurality of extinction tubes 9441, each of which is provided with an extinction hole, and the extinction hole extends from the first cover plate 75 to the second cover plate 76, so that stray light can be reflected multiple times in the extinction hole. Optionally, the plurality of extinction tubes 9441 can be distributed in a substantially honeycomb shape.

[0089] Optionally, see Fig.12 The matte fin 944 also includes a carrier plate 9442 , which is attached to the inner plate surface 821 of the first plate 82 and a plurality of matte tubes 9441 are connected to the carrier plate 9442 to facilitate assembly of the matte fin 944 and the housing 80 .

[0090] Optionally, refer again to Fig.11The light receiving assembly 20 further includes a shielding ring 24 disposed on the periphery of the light receiver 21 and a filter 25 disposed on the light incident side of the light receiver 21. When the product is assembled, due to the existence of the assembly gap, stray light may reach the light receiver 21 from the gap. The shielding ring 24 is designed to block the stray light in the gap from being transmitted toward the light receiver 21; for example, in combination with Fig.11 The optical receiving component 20 also includes a filter 25 arranged on the light incident side of the optical receiver 21. The gap between the filter 25 and the isolating member 70 and the receiving shielding cover 23 may constitute a first stray light channel 261, and the gap between the receiving shielding cover 23 and the receiving plate 22 may constitute a second stray light channel 262. At this time, the blocking ring 24 can be arranged on the periphery of the optical receiver 21 and its two ends respectively abut the surface of the receiving plate 22 on which the optical receiver 21 is installed and the surface of the filter facing the optical receiver 21, so as to block the first stray light channel 261 and the second stray light channel 262.

[0091] In the description of the present application, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances. In addition, in the description of the present application, unless otherwise specified, "multiple" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.

[0092] The above disclosure is only the preferred embodiment of the present application, which certainly cannot be used to limit the scope of rights of the present application. Therefore, equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. An optical-mechanical system, characterized in that: include: A light emitting component, used for emitting a light signal to a target object; A light receiving component, used for receiving an echo light signal reflected by the target object; An optical scanning component, wherein the emission light signal emitted by the optical emitting component is transmitted through the optical scanning element and then emitted to the target object, and the echo light signal reflected by the target object is transmitted through the optical scanning element and then reaches the optical receiving component; The light emitting component and the light receiving component are distributed on two opposite sides of the light scanning component along a first straight line direction.

2. The optical-mechanical system according to claim 1, characterized in that: The light emitting component and the light scanning element are distributed along a second straight line direction and are located on a side of the light scanning element away from the target object, and the second straight line direction intersects with the first straight line direction; and / or The light receiving components and the light scanning element are distributed along a second straight line direction and are located on a side of the light scanning element away from the target object. The second straight line direction intersects with the first straight line direction.

3. The optical-mechanical system according to claim 1, wherein: The optical scanning component includes a first optical scanning component and a second optical scanning component, and the optical mechanical system further includes a first optical path conversion component, which is arranged between the optical emitting component and the first optical scanning element along the transmission path of the emitted optical signal, and the first optical path conversion component includes at least one first reflecting element; and / or, The optomechanical system further includes a second optical path conversion component, which is located between the optical receiving component and the first optical scanning element along the transmission path of the echo optical signal, and includes at least one second reflecting element.

4. The optical-mechanical system according to claim 3, characterized in that: Along the second straight line direction, one of the first reflecting elements is located between one of the second reflecting elements and the first light scanning element, and one of the first reflecting elements is provided with a first light-through hole. The echo light signal can pass through the first light-through hole and reach one of the second reflecting elements. The second straight line direction intersects with the first straight line direction.

5. The optical-mechanical system according to claim 3, characterized in that: Along the second straight line direction, one of the second reflecting elements is located between one of the first reflecting elements and the first light scanning element, and one of the second reflecting elements is provided with a second light-through hole. The emitted light signal can pass through the second light-through hole and reach the first light scanning element. The second straight line direction intersects with the first straight line direction.

6. The optical-mechanical system according to claim 1, characterized in that: The first optical scanning element comprises a galvanometer, the galvanometer has a first reflective surface for transmitting the emission light signal and / or the echo light signal, and the galvanometer can rotate around a first rotation axis; and / or The second light scanning element includes a rotating mirror having a plurality of second reflecting surfaces for transmitting the emitted light signal and / or the echo light signal. The rotating mirror can rotate around a second rotating axis, and the plurality of second reflecting surfaces are arranged around the periphery of the second rotating axis, so that when the rotating mirror rotates around the second rotating axis, at least one of the second reflecting surfaces faces the first light scanning element of the first light scanning element.

7. The optical-mechanical system according to claim 1, wherein: Also included is a light collimating component, which is located between the light emitting component and the light scanning element.

8. The optical-mechanical system according to claim 7, characterized in that: The light collimation assembly includes a fast axis collimator and a slow axis collimator.

9. The optical-mechanical system according to claim 1, wherein: Also includes: A housing is formed with a first accommodating cavity, wherein the light emitting component, the light receiving component and the light scanning component are all located in the first accommodating cavity, and the housing includes a first plate; A main board, located in the first accommodating cavity and electrically connected to the optical emitting assembly, for controlling the optical emitting assembly to send an optical signal to a target object; the main board is also electrically connected to the optical receiving assembly, for controlling the optical receiving assembly to receive an echo optical signal reflected by the target object; The isolating member is located in the first accommodating cavity and is spaced apart from the first plate. The main board is arranged between the first plate and the isolating member. Both the first plate and the isolating member are metal members.

10. The optical-mechanical system according to claim 1, wherein: Also includes: The isolating member forms an emission light channel and an echo light channel, the emission light channel has a first light input port and a first light output port, the echo light channel has a second light input port and a second light output port, the light emitting component is arranged corresponding to the first light input port, the first light scanning element is arranged corresponding to the first light output port, the first light scanning element is also arranged corresponding to the second light input port, and the light receiving component is arranged corresponding to the second light output port.

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