Optical path adjusting device and laser radar

Abstract

The utility model relates to the technical field of laser radar, specifically disclose a light path adjusting device and laser radar, the light path adjusting device includes base, first connecting plate, adjusting plate, second connecting plate, mounting plate, fixed sleeve and adjusting screw, the both ends of first connecting plate are connected in base and adjusting plate respectively, the both ends of second connecting plate are connected in adjusting plate and mounting plate respectively, fixed sleeve is located on mounting plate, adjusting screw divides into first adjusting screw and second adjusting screw, and first adjusting screw and second adjusting screw all are screwed in adjusting plate. The light path adjusting device in the utility model can adjust the deflection angle of collimating lens in vertical direction and horizontal direction, thereby avoiding when being subjected to machining error or assembly error etc. situation, collimating lens is easy to produce light path deflection and leads to the optical module failure of laser radar, influences the normal use of laser radar.

Description

Technical Field

[0001] This utility model relates to the field of lidar technology, and in particular to an optical path adjustment device and a lidar. Background Technology

[0002] LiDAR (Light Detection and Ranging) is a detection system that uses laser light as its radiation source. By measuring the round-trip time and wavelength difference between the emitted and echoed laser signals, it obtains parameters such as the target's distance, azimuth, altitude, speed, and shape. Silicon photonics chips in LiDAR primarily handle the generation, modulation, transmission, and reception of optical signals, achieving system miniaturization and high performance through integrated design.

[0003] Currently, silicon photonic chips in lidar systems need to be used in conjunction with collimating lenses to control the collimation of the light beam and optimize the optical path layout. In existing technologies, the collimating lenses in lidar systems can only adjust the focal length. When subjected to manufacturing or assembly errors, the collimating lenses are prone to optical path deflection, which can lead to optical module failures and affect the normal operation of the lidar system. Utility Model Content

[0004] The purpose of this invention is to provide an optical path adjustment device and a lidar to solve the problem in the prior art where the collimating lens is prone to optical path deflection when subjected to processing errors or assembly errors, which in turn leads to optical module failure of the lidar and affects the normal use of the lidar.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] On one hand, this utility model provides an optical path adjustment device for adjusting the optical path of an aligned lens, the optical path adjustment device comprising:

[0007] Base;

[0008] A first connecting plate and an adjusting plate, wherein the two ends of the first connecting plate are respectively connected to the base and the adjusting plate, so that the base and the adjusting plate are spaced apart in the vertical direction;

[0009] The second connecting plate and the mounting plate are respectively connected at both ends to the adjusting plate and the mounting plate, so that the adjusting plate and the mounting plate are spaced apart in the horizontal direction;

[0010] A fixing sleeve is provided on the mounting plate and is used to install the collimating lens;

[0011] An adjusting screw, comprising a first adjusting screw and a second adjusting screw, both screwed to the adjusting plate; one end of the first adjusting screw can pass through the adjusting plate in the vertical direction and abut against the base, and one end of the second adjusting screw can pass through the adjusting plate in the horizontal direction and abut against the mounting plate.

[0012] As an alternative to the aforementioned optical path adjustment device, the adjustment plate includes a first adjustment block and a second adjustment block connected to each other. The first adjustment block and the second adjustment block have an L-shaped structure, and the fixing sleeve is located at a diagonal position between the first adjustment block and the second adjustment block.

[0013] As an alternative to the aforementioned optical path adjustment device, the base, the first connecting plate, the adjustment plate, the second connecting plate, and the mounting plate are integrally formed.

[0014] As an alternative to the aforementioned optical path adjustment device, the adjustment screw includes a threaded rod portion, a top connection portion, and an adjustment portion. The two ends of the threaded rod portion are respectively connected to the top connection portion and the adjustment portion. The threaded rod portion has an external thread, and the end of the adjustment portion away from the threaded rod portion is provided with a slot.

[0015] As an alternative to the aforementioned optical path adjustment device, the top connection part has an arched structure.

[0016] As an alternative to the aforementioned optical path adjustment device, the adjustment part has a through hole along the radial direction.

[0017] As an alternative to the aforementioned optical path adjustment device, the fixing sleeve has an installation channel, and a stepped portion is provided in the installation channel, with the collimating lens embedded in the stepped portion.

[0018] As an alternative to the aforementioned optical path adjustment device, several steps are provided, and these steps are arranged sequentially along the axial direction of the fixed sleeve to form a stepped structure.

[0019] As an alternative to the aforementioned optical path adjustment device, the fixing sleeve has an external thread, and the fixing sleeve is threaded to the mounting plate along the horizontal direction via the external thread.

[0020] On the other hand, this utility model provides a lidar, including the optical path adjustment device as described above.

[0021] The beneficial effects of this utility model are as follows:

[0022] The optical path adjustment device includes a base, a first connecting plate, an adjusting plate, a second connecting plate, a mounting plate, a fixing sleeve, and an adjusting screw. The two ends of the first connecting plate are connected to the base and the adjusting plate respectively, so that the base and the adjusting plate are spaced apart vertically. The two ends of the second connecting plate are connected to the adjusting plate and the mounting plate respectively, so that the adjusting plate and the mounting plate are spaced apart horizontally. The fixing sleeve is mounted on the mounting plate for mounting a collimating lens, allowing the collimating lens to move with the sleeve. The adjustment screw consists of a first adjustment screw and a second adjustment screw, both screwed to an adjustment plate. One end of the first adjustment screw passes vertically through the adjustment plate and abuts against the base, while one end of the second adjustment screw passes horizontally through the adjustment plate and abuts against the mounting plate. Rotating the first adjustment screw causes it to contact the base, and the elastic deformation of the first connecting plate causes the adjustment plate to deflect vertically relative to the base. Rotating the second adjustment screw causes it to contact the mounting plate, and the elastic deformation of the second connecting plate causes the mounting plate to deflect horizontally relative to the adjustment plate. This adjusts the deflection angle of the collimating lens in both the vertical and horizontal directions, thus preventing optical path deflection caused by processing or assembly errors, which could lead to optical module malfunctions in the lidar and affect its normal operation. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the optical path adjustment device provided in an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the adjusting screw provided in an embodiment of the present invention.

[0025] In the picture:

[0026] 1. Base; 2. First connecting plate; 3. Adjusting plate; 31. First adjusting block; 32. Second adjusting block; 4. Second connecting plate; 5. Mounting plate; 6. Fixing sleeve; 61. Mounting channel; 611. Stepped part; 7. Adjusting screw; 71. Threaded rod part; 72. Top connection part; 73. Adjusting part; 731. Slot; 732. Through hole. Detailed Implementation

[0027] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0028] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Moreover, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0031] like Figure 1 and Figure 2 As shown, this embodiment provides an optical path adjustment device for adjusting the optical path of a straight lens.

[0032] The optical path adjustment device includes a base 1, a first connecting plate 2, an adjusting plate 3, a second connecting plate 4, a mounting plate 5, a fixing sleeve 6, and an adjusting screw 7. The two ends of the first connecting plate 2 are connected to the base 1 and the adjusting plate 3 respectively, so that the base 1 and the adjusting plate 3 are spaced apart vertically. The two ends of the second connecting plate 4 are connected to the adjusting plate 3 and the mounting plate 5 respectively, so that the adjusting plate 3 and the mounting plate 5 are spaced apart horizontally. The fixing sleeve 6 is mounted on the mounting plate 5 for mounting a collimating lens, allowing the collimating lens to move with the sleeve.

[0033] The adjusting screw 7 is divided into a first adjusting screw and a second adjusting screw. Both the first and second adjusting screws are screwed to the adjusting plate 3. One end of the first adjusting screw can pass through the adjusting plate 3 vertically and abut against the base 1, while one end of the second adjusting screw can pass through the adjusting plate 3 horizontally and abut against the mounting plate 5. By rotating the first adjusting screw, it can be brought into contact with the base 1. After the first connecting plate 2 elastically deforms, the adjusting plate 3 deflects relative to the base 1 in the vertical direction. By rotating the second adjusting screw, it can be brought into contact with the mounting plate 5. After the second connecting plate 4 elastically deforms, the mounting plate 5 deflects relative to the adjusting plate 3 in the horizontal direction. This adjusts the deflection angle of the collimating lens in the vertical and horizontal directions, thus avoiding the problem that the collimating lens is prone to optical path deflection due to processing errors or assembly errors, which could lead to optical module failure of the lidar and affect its normal operation.

[0034] Optionally, the fixing sleeve 6 has external threads, and the fixing sleeve 6 is threaded horizontally to the mounting plate 5 via the external threads. This allows the focal length of the collimating lens to be adjusted after the deflection angle of the collimating lens has been adjusted by adjusting the position of the fixing sleeve 6 relative to the mounting plate 5. Further optionally, the base 1, the first connecting plate 2, the adjusting plate 3, the second connecting plate 4, and the mounting plate 5 are integrally formed, thereby reducing assembly errors and minimizing the impact of assembly errors on the optical path direction of the collimating lens.

[0035] Specifically, the adjusting plate 3 includes a first adjusting block 31 and a second adjusting block 32 connected to each other. The first adjusting block 31 and the second adjusting block 32 have an L-shaped structure, and the fixing sleeve 6 is located diagonally opposite the first adjusting block 31 and the second adjusting block 32. Thus, the overall structure of the optical path adjusting device is compact, facilitating miniaturization design. Optionally, the first adjusting block 31 has a first threaded hole in the vertical direction, and a first adjusting screw is screwed into the first threaded hole. The second adjusting block 32 has a second threaded hole in the horizontal direction, and a second adjusting screw is screwed into the second threaded hole. Further optionally, the first adjusting block 31 has a recessed portion on the side near the fixing sleeve 6, so that the fixing sleeve 6 can be avoided by the recessed portion, further facilitating the miniaturization of the optical path adjusting device.

[0036] Furthermore, the adjusting screw 7 includes a threaded rod portion 71, a top contact portion 72, and an adjusting portion 73. The threaded rod portion 71 is connected to the top contact portion 72 and the adjusting portion 73 at both ends. The threaded rod portion 71 has external threads, allowing it to be screwed onto the adjusting plate 3. The adjusting portion 73 has a slot 731 at its end away from the threaded rod portion 71, allowing the user to use a hand tool to engage the slot 731 for rotational adjustment of the adjusting screw 7. Specifically, the slot 731 is a slotted groove or a cross-shaped groove. Optionally, the top contact portion 72 has an arched structure, preventing wear or scratches when it contacts the base 1 or mounting plate 5, thus extending the service life of the optical path adjustment device. Further optionally, the adjusting portion 73 has a through hole 732 radially, allowing a pry bar to be inserted into the through hole 732 to assist in rotating the adjusting screw 7 when rotation by hand tools becomes difficult.

[0037] Furthermore, the fixing sleeve 6 has an installation channel 61, within which a step portion 611 is provided. The collimating lens is embedded in the step portion 611, thereby achieving the positioning and installation of the collimating lens. Optionally, several steps 611 are provided, and these steps 611 are arranged sequentially along the axial direction of the fixing sleeve 6 to form a stepped structure. Thus, through the steps 611 of different diameters within the stepped structure, collimating lenses of different diameters can be positioned and installed, thereby meeting the requirements of actual working conditions.

[0038] This embodiment also provides a lidar, including the optical path adjustment device as described above. By using the optical path adjustment device as described above, the lidar can adjust the deflection angle of the collimating lens in the vertical and horizontal directions, thereby avoiding the problem that the collimating lens is prone to optical path deflection when subjected to processing errors or assembly errors, which may cause optical module failure of the lidar and affect the normal use of the lidar.

[0039] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An optical path adjustment device for adjusting the optical path of an aligned lens, characterized in that, The optical path adjustment device includes: Base (1); The first connecting plate (2) and the adjusting plate (3) are connected at both ends to the base (1) and the adjusting plate (3) respectively, so that the base (1) and the adjusting plate (3) are spaced apart in the vertical direction; The second connecting plate (4) and the mounting plate (5) are connected at both ends to the adjusting plate (3) and the mounting plate (5) respectively, so that the adjusting plate (3) and the mounting plate (5) are spaced apart in the horizontal direction; A fixing sleeve (6) is provided on the mounting plate (5) and is used to install the collimating lens; The adjusting screw (7) is divided into a first adjusting screw and a second adjusting screw. Both the first adjusting screw and the second adjusting screw are screwed to the adjusting plate (3). One end of the first adjusting screw can pass through the adjusting plate (3) in the vertical direction and abut against the base (1). One end of the second adjusting screw can pass through the adjusting plate (3) in the horizontal direction and abut against the mounting plate (5).

2. The optical path adjustment device according to claim 1, characterized in that, The adjusting plate (3) includes a first adjusting block (31) and a second adjusting block (32) connected to each other. The first adjusting block (31) and the second adjusting block (32) have an L-shaped structure. The fixing sleeve (6) is located at the diagonal position of the first adjusting block (31) and the second adjusting block (32).

3. The optical path adjustment device according to claim 1, characterized in that, The base (1), the first connecting plate (2), the adjusting plate (3), the second connecting plate (4), and the mounting plate (5) are integrally formed.

4. The optical path adjustment device according to claim 1, characterized in that, The adjusting screw (7) includes a threaded rod portion (71), a top connection portion (72), and an adjusting portion (73). The two ends of the threaded rod portion (71) are respectively connected to the top connection portion (72) and the adjusting portion (73). The threaded rod portion (71) has an external thread, and the adjusting portion (73) has a slot (731) at one end away from the threaded rod portion (71).

5. The optical path adjustment device according to claim 4, characterized in that, The top part (72) is an arched structure.

6. The optical path adjustment device according to claim 4, characterized in that, The adjustment part (73) has a through hole (732) in the radial direction.

7. The optical path adjustment device according to claim 1, characterized in that, The fixing sleeve (6) has an installation channel (61), and a step portion (611) is provided in the installation channel (61), and the collimating lens is embedded in the step portion (611).

8. The optical path adjustment device according to claim 7, characterized in that, The stepped portion (611) is provided in a plurality of manner, and the plurality of stepped portions (611) are arranged sequentially along the axial direction of the fixed sleeve (6) to form a stepped structure.

9. The optical path adjustment device according to any one of claims 1 to 8, characterized in that, The fixing sleeve (6) has external threads, and the fixing sleeve (6) is threaded to the mounting plate (5) along the horizontal direction via the external threads.

10. A lidar, characterized in that, Includes the optical path adjustment device as described in any one of claims 1 to 9.

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