Large fan angle laser device for 3D camera

Abstract

The utility model relates to a large fan angle laser device for a 3D camera, and belongs to the technical field of machine vision equipment. An assembling unit is fixed in a camera shell, a laser emitting unit is arranged on the assembling unit, and the emitting end of the laser emitting unit right faces a window unit; the laser emitting unit structurally comprises a first laser and a second laser which are arranged in a parallel state, the first laser emits corresponding to a first laser emitting area, the second laser emits corresponding to a second laser emitting area, and an overlapping area exists between the first laser emitting area and the second laser emitting area; the brightness of the parts, located in the overlapping area, of the first laser emitting area and the second laser emitting area is set to be 50%. The brightness of the parts, located outside the overlapping area, of the first laser emitting area and the second laser emitting area is set to be 90%. According to the utility model, the technical problem that a single laser cannot meet the requirement of a large fan angle is solved, the brightness is uniform, and the manufacturing cost is lower than that of a single large fan angle laser.

Description

Technical Field

[0001] The utility model relates to the technical field of machine vision equipment, in particular to a large fan-angle laser device for a 3D camera. Background Art

[0002] 3D cameras are widely used in today's science and technology fields, especially in the fields of machine vision, autonomous driving, drone navigation, etc., and the demand for large field of view and ultra-low clearance is becoming increasingly prominent. However, this demand has brought unprecedented challenges to the manufacture of semiconductor line lasers. In this process, the Powell prism inside the semiconductor line laser plays a vital role; due to the limitations of the manufacturing process, when the fan angle of the Powell prism is greater than 90°, its manufacturing difficulty will increase significantly. This leads to a decrease in the yield in the manufacturing process and the production efficiency cannot be guaranteed. This manufacturing difficulty has hindered the mass production of line laser 3D cameras, and it cannot meet the needs of large field of view and ultra-low clearance, which limits the development and application of 3D cameras. Utility Model Content

[0003] In view of the shortcomings of the above-mentioned existing production technology, the applicant provides a large fan-angle laser device for 3D cameras, which can solve the technical problem that a single laser cannot meet the large fan-angle requirement by combining two lasers. At the same time, the cost is lower than that of a single large fan-angle laser.

[0004] The technical solution adopted by the utility model is as follows: a large fan-angle laser device for a 3D camera, comprising a camera housing, an assembly unit is fixed inside the camera housing, a laser emitting unit is arranged on the assembly unit, and the emitting end of the laser emitting unit is directly facing the window unit; the structure of the laser emitting unit is: comprising a first laser and a second laser arranged in parallel with each other, the first laser emission corresponds to a first laser emission area, the second laser emission corresponds to a second laser emission area, and there is an overlap area between the first laser emission area and the second laser emission area; the brightness of the first laser emission area and the second laser emission area located in the overlap area is set to 50%; the brightness of the first laser emission area and the second laser emission area located outside the overlap area is set to 90%.

[0005] As a further improvement of the above technical solution:

[0006] Preferably, the structure of the camera housing is as follows: it comprises a shell, a fixing column engaged with the assembly unit is arranged on the inner wall of the shell, an assembly block is arranged on one side of the fixing column, and the assembly block is fixedly connected to the assembly unit.

[0007] Preferably, the bottom of the shell is also provided with a round hole, and the bottom surface of the round hole is equipped with a window unit.

[0008] Preferably, the structure of the assembly unit includes a first fixing block fixed on the assembly block, and a second fixing block fixedly connected to the first fixing block.

[0009] Preferably, the structure of the first fixing block is as follows: it includes a semicircular hole, which is snap-fitted with the fixing column; it also includes a bolt assembly hole, which matches the assembly block; it also includes a laser assembly groove for installing the first laser and the second laser.

[0010] Preferably, the laser assembly groove is in an overall "W"-shaped structure, and the second fixing block is in an overall "M"-shaped structure; the laser assembly groove and the second fixing block are fixedly connected to form a mounting groove for fastening the first laser and the second laser.

[0011] Preferably, a hole is opened on the assembly block at a position matching the bolt assembly hole, and the first fixing block is assembled with bolts.

[0012] The beneficial effects of the utility model are as follows:

[0013] The utility model has a compact structure. Two lasers are assembled through an assembly unit. At the same time, the positions and angles of the two lasers are adjusted to keep the laser lines emitted by the two lasers parallel. When the line width and brightness uniformity of the laser lines meet the requirements, the effect of a large fan angle is achieved, thereby reducing the cost of achieving the large fan angle effect.

[0014] The utility model also has the following advantages:

[0015] The brightness of the first laser emitting area and the second laser emitting area located in the overlapped area is set to 50%, and the brightness of the first laser emitting area and the second laser emitting area located outside the overlapped area is set to 90%, and the brightness of the entire laser emitting area is uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0017] Figure 2 This is a schematic diagram of the camera housing structure of the present utility model.

[0018] Figure 3 This is a schematic diagram of the assembly unit structure of the utility model.

[0019] Figure 4 This is a schematic diagram of the first fixing block structure of the utility model.

[0020] Figure 5 This is a schematic diagram of the window unit structure of the utility model.

[0021] Figure 6It is a state schematic diagram of the laser emitting unit of the utility model.

[0022] Among them: 1. Camera housing; 2. Assembly unit; 3. Laser emission unit; 4. Window unit;

[0023] 101, housing; 102, fixing column; 103, assembly block; 104, oval hole;

[0024] 201, a first fixing block; 202, a second fixing block;

[0025] 301, first laser; 302, second laser; 303, first laser emitting area; 304, second laser emitting area; 305, overlap area;

[0026] 20101, semicircular hole; 20102, bolt assembly hole; 20103, laser assembly slot. DETAILED DESCRIPTION

[0027] The specific implementation of the present utility model is described below in conjunction with the accompanying drawings.

[0028] like Figure 1 to Figure 6 As shown, the large fan-angle laser device for a 3D camera of this embodiment comprises a camera housing 1, an assembly unit 2 is fixed inside the camera housing 1, a laser emitting unit 3 is arranged on the assembly unit 2, and the emitting end of the laser emitting unit 3 faces the window unit 4; the structure of the laser emitting unit 3 is as follows: it comprises a first laser 301 and a second laser 302 which are arranged in parallel with each other, the first laser 301 emits a corresponding first laser emitting area 303, the second laser 302 emits a corresponding second laser emitting area 304, and there is an overlap area 305 between the first laser emitting area 303 and the second laser emitting area 304; the brightness of the first laser emitting area 303 and the second laser emitting area 304 located in the overlap area 305 is set to 50%; the brightness of the first laser emitting area 303 and the second laser emitting area 304 located outside the overlap area 305 is set to 90%; in this embodiment, the adjustment of the brightness of the first laser 301 and the second laser 302 in different emission areas can be adjusted and set by the manufacturer according to requirements during production.

[0029] In this embodiment, the structure of the camera housing 1 is as follows: it includes a shell 101, a fixing column 102 engaged with the assembly unit 2 is provided on the inner wall of the shell 101, and an assembly block 103 is provided on one side of the fixing column 102, and the assembly block 103 is fixedly connected to the assembly unit 2.

[0030] In this embodiment, a round hole 104 is further provided at the bottom of the housing 101 , and the window unit 4 is assembled on the bottom surface of the round hole 104 .

[0031] In this embodiment, the structure of the assembly unit 2 includes a first fixing block 201 fixed on the assembly block 103 , and a second fixing block 202 fixedly connected to the first fixing block 201 .

[0032] In this embodiment, the structure of the first fixed block 201 is: including a semicircular hole 20101, which is snap-fitted with the fixed column 102; also including a bolt assembly hole 20102, which matches the assembly block 103; and also including a laser assembly groove 20103 for installing the first laser 301 and the second laser 302.

[0033] In this embodiment, the laser assembly groove 20103 is an overall "W"-shaped structure, and the second fixed block 202 is an overall "M"-shaped structure; the laser assembly groove 20103 and the second fixed block 202 are fixedly connected to form a mounting groove for fastening the first laser 301 and the second laser 302.

[0034] In this embodiment, a hole is opened on the assembly block 103 at a position matching the bolt assembly hole 20102 , and the first fixing block 201 and the assembly block 103 are assembled with bolts.

[0035] In actual work, the assembly method of the utility model is as follows:

[0036] First, the semicircular hole 20101 of the first fixing block 201 is engaged with the fixing column 102, and then the bolt assembly hole 20102 is bolted to the corresponding assembly block 103 to complete the installation of the first fixing block 201;

[0037] Then, the first laser 301 and the second laser 302 are inserted into the laser assembly groove 20103 of the first fixed block 201, and the position angles of the first laser 301 and the second laser 302 are adjusted. The adjustment method is: the first laser 301 and the second laser 302 are respectively placed in the laser assembly groove 20103 for limiting, and the parallelism detection is performed with the same gauge block to ensure that the laser lines emitted by the first laser 301 and the second laser 302 remain in a parallel state. At the same time, the position and angle of the two lasers are adjusted to determine the overlap of the two laser lines. The overlap detection is based on the laser line width detection. When the laser line width and brightness uniformity can meet the requirements, it indicates that the laser debugging is completed.

[0038] After the adjustment is completed, it is fixed by the second fixing block 202 to achieve the effect of a large fan angle.

[0039] The utility model has a reasonable structure and is easy to operate. The first laser 301 and the second laser 302 are assembled by the assembly unit 2. At the same time, the positions and angles of the two lasers are adjusted to keep the laser lines emitted by the two lasers parallel. When the line width and brightness uniformity of the laser line meet the requirements, the effect of a large fan angle can be achieved, thereby reducing the cost of achieving the large fan angle effect.

[0040] The above description is an explanation of the utility model, not a limitation of the utility model. The scope of the utility model is defined by the claims. Any form of modification can be made within the protection scope of the utility model.

Claims

1. A large fan angle laser device for a 3D camera, characterized in that: The camera comprises a camera housing (1), wherein an assembly unit (2) is fixed inside the camera housing (1), a laser emitting unit (3) is arranged on the assembly unit (2), and an emitting end of the laser emitting unit (3) faces a window unit (4); The structure of the laser emitting unit (3) is as follows: it comprises a first laser (301) and a second laser (302) which are arranged in parallel with each other, the first laser (301) emits light corresponding to a first laser emitting area (303), the second laser (302) emits light corresponding to a second laser emitting area (304), and an overlap area (305) is provided between the first laser emitting area (303) and the second laser emitting area (304); The brightness of the first laser emitting area (303) and the second laser emitting area (304) located in the overlap area (305) is set to 50%; The brightness of the first laser emitting area (303) and the second laser emitting area (304) outside the overlap area (305) is set to 90%.

2. The large fan angle laser device for a 3D camera as claimed in claim 1, characterized in that: The structure of the camera housing (1) is as follows: it comprises a shell (101), a fixing column (102) which is engaged with an assembly unit (2) is arranged on the inner wall of the shell (101), an assembly block (103) is arranged on one side of the fixing column (102), and the assembly block (103) is fixedly connected to the assembly unit (2).

3. The large fan angle laser device for a 3D camera as claimed in claim 2, characterized in that: The bottom of the housing (101) is also provided with a round hole (104), and the bottom surface of the round hole (104) is equipped with a window unit (4).

4. The large fan angle laser device for a 3D camera as claimed in claim 2, characterized in that: The assembly unit (2) has a structure comprising a first fixing block (201) fixed on the assembly block (103), and a second fixing block (202) fixedly connected to the first fixing block (201).

5. The large fan angle laser device for a 3D camera as claimed in claim 4, characterized in that: The structure of the first fixing block (201) is as follows: it comprises a semicircular hole (20101), and the semicircular hole (20101) is engaged and assembled with the fixing column (102); It also includes a bolt assembly hole (20102), wherein the bolt assembly hole (20102) matches the assembly block (103); It also includes a laser assembly groove (20103) for mounting the first laser (301) and the second laser (302).

6. The large fan angle laser device for a 3D camera as claimed in claim 5, characterized in that: The laser assembly groove (20103) is in a "W"-shaped structure as a whole, and the second fixing block (202) is in an "M"-shaped structure as a whole; The laser assembly groove (20103) and the second fixing block (202) are fixedly connected to form a mounting groove for fastening the first laser (301) and the second laser (302).

7. The large fan angle laser device for a 3D camera as claimed in claim 5, characterized in that: A hole is opened on the assembly block (103) at a position matching the bolt assembly hole (20102), and the first fixing block (201) and the assembly block (103) are assembled with bolts.

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