Airborne laser radar emergent light adjusting structure

Abstract

The utility model provides an airborne laser radar emergent light adjusting structure, which comprises an emergent light adjusting assembly, the emergent light adjusting assembly comprises a mounting base block, the mounting base block is provided with a central hollow hole, a right-angle reflecting prism is arranged in the central hollow hole, one side of the mounting base block is provided with a collimator, the end part of the collimator is provided with an inclined plane reflecting mirror, and the plane reflecting mirror is arranged on the mounting base block. Laser is emitted from the collimator and reflected to the right-angle reflecting prism through the plane reflecting mirror to be reflected again, the collimator can rotate, a rotating base is arranged on one side of the right-angle reflecting prism and rotationally connected with the inner wall of the central hollow hole, and the rotating axis of the collimator and the axis of the rotating base are arranged in a non-coplanar crossed mode. The problem that the light emitted by the collimator is parallel to the optical axis is solved.

Description

Technical Field

[0001] The utility model relates to the field of laser radar, in particular to an airborne laser radar output light adjustment structure. Background Art

[0002] When airborne LiDARs leave the factory, the light from the collimator must be parallel to the optical axis, requiring an optical axis adjustment mechanism. Traditional adjustment mechanisms focus on a single reflector. To maintain parallelism between the collimated light and the optical axis, adjustments must be made in two spatial dimensions. Adjusting one dimension using traditional methods inevitably affects the light in the other, making optical path adjustments complex and time-consuming. Utility Model Content

[0003] The utility model provides an airborne laser radar output light adjustment structure, which solves the problem of adjusting the parallelism of light output from a collimator to an optical axis.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: an airborne laser radar output light adjustment structure, including an output light adjustment component, the output light adjustment component includes an installation base block, the installation base block is provided with a central hollow hole, a right-angle reflection prism is provided in the central hollow hole, a collimator is provided on one side of the installation base block, and an inclined plane reflector is provided on the end of the collimator. The laser starts from the collimator, is reflected by the plane reflector to the right-angle reflection prism, and is reflected again. The collimator is rotatable, and a swivel seat is provided on one side of the right-angle reflection prism. The swivel seat is rotatably connected to the inner wall of the central hollow hole, and the rotation axis of the collimator and the axis of the swivel seat are arranged in skew planes.

[0005] In a preferred solution, the rotation axis of the collimator and the rotation axis of the right-angle reflection prism are arranged in different planes and perpendicularly.

[0006] In a preferred solution, a side ear seat is provided on the side wall of the mounting base block, and the side ear seat is provided with a through hole. The through hole of the side ear seat is rotatably socketed with the collimator, and a first adjustment seat is provided between the end of the collimator and the plane reflector. A first base block is provided at the end of the side ear seat, and a first adjustment top screw and a second adjustment top screw are threadedly connected on the first base block. The ends of the first adjustment top screw and the second adjustment top screw pass through the first base block to rest on the first adjustment seat.

[0007] In the preferred solution, a first arc-shaped hole and a pin hole are provided on the first adjustment seat, a first locking screw is provided in the first arc-shaped hole, the first locking screw is threadedly connected to the side ear seat, a countersunk hole is provided on the side ear seat, the countersunk hole is connected to the pin hole, and the diameter of the countersunk hole is larger than the pin hole.

[0008] In the preferred embodiment, a first arc-shaped hole and a pin hole are provided on the first adjustment seat, a first locking screw is provided in the first arc-shaped hole, and the first locking screw is threadedly connected to the side ear seat. A second arc-shaped hole is also provided on the first adjustment seat, a second locking screw is provided in the second arc-shaped hole, and the second locking screw is threadedly connected to the side ear seat.

[0009] In the preferred embodiment, a rotatable second adjustment seat is provided on the outer wall of the central hollow hole, the second adjustment seat is connected to the swivel seat of the right-angle reflecting prism, a second base block is provided on one side of the central hollow hole port, and a third adjustment top screw and a fourth adjustment top screw are provided on the second base block with threaded connections, and the ends of the third adjustment top screw and the fourth adjustment top screw pass through the second base block to rest on the second adjustment seat.

[0010] The beneficial effects of the present invention are as follows: the adjustment structure adopts a paraxial transceiver optical system, that is, the transmitting and receiving light paths are completely separated, parallel and non-overlapping, so as to reduce the influence of stray light; the collimated light source installed on the side of the mounting base block, its light beam passes through the reflector, is incident on the lens aperture range in the direction perpendicular to the reference axis, and is then reflected by the right-angle prism to become the output light parallel to the reference axis; the introduction of the double reflector can reduce the difficulty of optical axis alignment in actual assembly and reduce the system size. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0012] Figure 1 This is the schematic diagram of the output light adjustment component Figure 1 .

[0013] Figure 2 This is the schematic diagram of the output light adjustment component Figure 2 .

[0014] Figure 3 This is a schematic diagram of the output light adjustment component from another angle.

[0015] Figure 4 This is a schematic diagram of a locking method of the adjustment seat of the present invention.

[0016] Figure 5 This is a schematic diagram of the second locking method of the adjustment seat of the present invention.

[0017] In the figure: output light adjustment component 1; collimator 101; plane reflector 102; first adjustment seat 103; mounting base block 104; first base block 105; first adjustment screw 106; second adjustment screw 107; right-angle reflecting prism 108; swivel seat 109; second adjustment seat 110; second base block 111; third adjustment screw 112; fourth adjustment screw 113; right-angle prism reflecting light 114; optical axis 115; central hollow hole 116; side ear seat 117; light-through hole 118; first arc hole 119; first locking screw 120; countersunk hole 121; pin hole 122; second locking screw 123; second arc hole 124; line output position 2; laser moving line 201. DETAILED DESCRIPTION

[0018] like Figure 1-5 In the invention, an airborne laser radar outgoing light adjustment structure includes an outgoing light adjustment component 1, which includes an installation base block 104, the installation base block 104 is provided with a central hollow hole 116, a right-angle reflection prism 108 is provided in the central hollow hole 116, a collimator 101 is provided on one side of the installation base block 104, and an inclined plane reflector 102 is provided at the end of the collimator 101. The laser starts from the collimator 101, passes through the plane reflector 102 and is reflected on the right-angle reflection prism 108 for re-reflection. The collimator 101 is rotatable, and a swivel seat 109 is provided on one side of the right-angle reflection prism 108. The swivel seat 109 is rotatably connected to the inner wall of the central hollow hole 116, and the rotation axis of the collimator 101 and the axis of the swivel seat 109 are arranged in a non-planar cross pattern.

[0019] A light hole 118 is provided on the side wall of the central hollow hole 116 for reflecting light from the plane reflector 102 to the right-angle reflective prism 108. The central axis direction of the central hollow hole 116 is the direction of the theoretical optical axis 115. The light 114 reflected again by the right-angle prism needs to be parallel to the optical axis 115.

[0020] The axis of the swivel seat 109 is perpendicular to the central axis of the central hollow hole 116 .

[0021] One of the surfaces of the mounting base block 104 is a reference mounting surface, and the reference mounting surface must be perpendicular to the optical axis 115 .

[0022] In a preferred embodiment, the rotation axis of the collimator 101 and the axis of the rotating base 109 of the right-angle reflecting prism 108 are arranged in different planes and perpendicularly.

[0023] When the planes are not perpendicular, the adjustment of the plane reflector 102 only changes a single swing angle component. However, considering the actual position of the wire outlet position 2, the vertical arrangement causes the wire bending angle to be too large. Therefore, the collimator 101 is arranged at a certain tilt angle to ensure that the wire is at a safe angle.

[0024] In the preferred solution, a side ear seat 117 is provided on the side wall of the mounting base block 104, and the side ear seat 117 is provided with a through hole. The through hole of the side ear seat 117 is rotatably connected to the collimator 101, and a first adjustment seat 103 is provided between the end of the collimator 101 and the plane reflector 102. A first base block 105 is provided at the end of the side ear seat 117, and a first adjustment top screw 106 and a second adjustment top screw 107 are threadedly connected on the first base block 105. The ends of the first adjustment top screw 106 and the second adjustment top screw 107 pass through the first base block 105 to rest on the first adjustment seat 103.

[0025] The side lugs 117 are tilted at a certain angle so that the central axis of the collimator 101 is not perpendicular to the central axis of the rotating base 109, ensuring a reasonable bending angle of the wire in a compact mechanical arrangement. At this time, the collimator 101 is adjusted and rotated, and the line drawn by the laser on the right-angle reflecting prism 108, such as the laser moving line 201, is an oblique line.

[0026] The first base block 105 is provided with a through hole and embedded with a threaded sleeve for mounting a first adjusting top screw 106 and a second adjusting top screw 107 .

[0027] The first adjusting screw 106 pushes out the second adjusting screw 107 and retracts, and the first adjusting seat 103 rotates clockwise; the second adjusting screw 107 pushes out the first adjusting screw 106 and retracts, and the output light adjustment component 1 rotates counterclockwise.

[0028] In the preferred solution, a first arc-shaped hole 119 and a pin hole 122 are provided on the first adjustment seat 103, a first locking screw 120 is provided in the first arc-shaped hole 119, the first locking screw 120 is threadedly connected to the side ear seat 117, a countersunk hole 121 is provided on the side ear seat 117, the countersunk hole 121 is connected to the pin hole 122, and the diameter of the countersunk hole 121 is larger than the pin hole 122.

[0029] Initially, the first locking screw 120 is loosened. After the optical axis is adjusted, the first locking screw 120 is tightened. There are two ways to fix the adjustment seat. The first is to then pour glue into the pin hole 122. The glue partially flows into the sink hole 121 and waits for it to solidify. The angle between the first adjustment seat 103 and the side ear seat 117 is fixed.

[0030] In the preferred embodiment, a first arc-shaped hole 119 and a pin hole 122 are provided on the first adjustment seat 103, a first locking screw 120 is provided in the first arc-shaped hole 119, and the first locking screw 120 is threadedly connected to the side ear seat 117. A second arc-shaped hole 124 is also provided on the first adjustment seat 103, a second locking screw 123 is provided in the second arc-shaped hole 124, and the second locking screw 123 is threadedly connected to the side ear seat 117.

[0031] The second fixing method of the adjustment seat is to strengthen the locking of the first adjustment seat 103 through multiple second locking screws 123. In this way, the first locking screw 120 and the second locking screw 123 can be loosened later to achieve readjustment of the first adjustment seat 103, but the loosening risk is higher than that of gluing.

[0032] In the preferred embodiment, a rotatable second adjustment seat 110 is provided on the outer wall of the central hollow hole 116, and the second adjustment seat 110 is connected to the rotating seat 109 of the right-angle reflecting prism 108. A second base block 111 is provided on one side of the port of the central hollow hole 116, and a third adjustment top screw 112 and a fourth adjustment top screw 113 are threadedly connected on the second base block 111. The ends of the third adjustment top screw 112 and the fourth adjustment top screw 113 pass through the second base block 111 to rest on the second adjustment seat 110.

[0033] The pushing and rotating principle of the second adjustment seat 110 is similar to that of the first adjustment seat 103 , and the locking structure can also adopt the same method as the locking structure of the first adjustment seat 103 .

[0034] The laser is emitted through a collimator 101, a plane reflector 102 fixed to the upper end of the collimator 101. The collimator 101 is fixed as a whole to a first adjustment seat 103, which is mounted on a base block 104. The first adjustment seat 103 is pushed up by a first adjustment screw 106 and a second adjustment screw 107 on the first base block 105, driving the reflector 102 to rotate, thereby achieving one-dimensional adjustment of the collimated light. A right-angle reflector 108 is fixed to a swivel seat 109, which is connected to a second adjustment seat 110. A second base block 111 is fixed to the base block 104. The third adjustment screw 112 and the fourth adjustment screw 113 on the second base block 111 are adjusted to push up the second adjustment seat 110, thereby achieving another dimension of adjustment of the collimated light.

[0035] By adjusting the two dimensions of the collimated light by the plane reflector 102 and the right-angle reflective prism 108 , the parallelism of the light 114 reflected by the right-angle prism and the optical axis 115 can be achieved.

[0036] When the side ear seat 117 is arranged at an angle, the plane reflector 102 can be rotated first to adjust one of the swing dimensions to be parallel, and then the right-angle reflector 108 can be adjusted to adjust the other dimension to be parallel.

[0037] The above embodiments are merely preferred technical solutions of the present invention and should not be construed as limiting the present invention. The scope of protection of the present invention shall be the technical solutions set forth in the claims, including equivalent alternatives to the technical features of the technical solutions set forth in the claims. Equivalent alternatives and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. An airborne laser radar output light adjustment structure, characterized by: The invention comprises an exit light adjustment component (1), wherein the exit light adjustment component (1) comprises a mounting base block (104), the mounting base block (104) is provided with a central hollow hole (116), a right-angle reflection prism (108) is provided in the central hollow hole (116), a collimator (101) is provided on one side of the mounting base block (104), an inclined plane reflection mirror (102) is provided at the end of the collimator (101), laser light starts from the collimator (101), passes through the plane reflection mirror (102), and is reflected onto the right-angle reflection prism (108) for re-reflection, the collimator (101) is rotatable, a rotating seat (109) is provided on one side of the right-angle reflection prism (108), the rotating seat (109) is rotatably connected to the inner wall of the central hollow hole (116), and the rotation axis of the collimator (101) and the axis of the rotating seat (109) are arranged in a non-planar cross pattern.

2. The airborne laser radar output light adjustment structure according to claim 1, characterized in that: The rotation axis of the collimator (101) and the axis of the rotating seat (109) of the right-angle reflecting prism (108) are arranged in different planes and perpendicularly.

3. The airborne laser radar output light adjustment structure according to claim 1, characterized in that: A side ear seat (117) is provided on the side wall of the mounting base block (104), and the side ear seat (117) is provided with a through hole. The through hole of the side ear seat (117) is rotatably sleeved with the collimator (101). A first adjustment seat (103) is provided between the end of the collimator (101) and the plane reflector (102). A first base block (105) is provided at the end of the side ear seat (117). A first adjustment screw (106) and a second adjustment screw (107) are provided on the first base block (105) in threaded connection. The ends of the first adjustment screw (106) and the second adjustment screw (107) pass through the first base block (105) to abut against the first adjustment seat (103).

4. The airborne laser radar output light adjustment structure according to claim 3, characterized in that: The first adjustment seat (103) is provided with a first arc-shaped hole (119) and a pin hole (122), a first locking screw (120) is provided in the first arc-shaped hole (119), the first locking screw (120) is threadedly connected to the side ear seat (117), and the side ear seat (117) is provided with a sink hole (121), the sink hole (121) is communicated with the pin hole (122), and the diameter of the sink hole (121) is larger than the pin hole (122).

5. The airborne laser radar output light adjustment structure according to claim 3, characterized in that: The first adjustment seat (103) is provided with a first arc-shaped hole (119) and a pin hole (122), the first arc-shaped hole (119) is provided with a first locking screw (120), the first locking screw (120) is threadedly connected to the side ear seat (117), and the first adjustment seat (103) is further provided with a second arc-shaped hole (124), the second arc-shaped hole (124) is provided with a second locking screw (123), and the second locking screw (123) is threadedly connected to the side ear seat (117).

6. The airborne laser radar output light adjustment structure according to claim 1, characterized in that: A rotatable second adjustment seat (110) is provided on the outer wall of the central hollow hole (116), and the second adjustment seat (110) is connected to the rotating seat (109) of the right-angle reflecting prism (108). A second base block (111) is provided on one side of the end of the central hollow hole (116), and a third adjustment top screw (112) and a fourth adjustment top screw (113) are provided on the second base block (111) in threaded connection. The ends of the third adjustment top screw (112) and the fourth adjustment top screw (113) pass through the second base block (111) to abut against the second adjustment seat (110).

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