CN114527566A - Manufacturing method of rotating mirror device - Google Patents
Manufacturing method of rotating mirror device Download PDFInfo
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- CN114527566A CN114527566A CN202210062433.4A CN202210062433A CN114527566A CN 114527566 A CN114527566 A CN 114527566A CN 202210062433 A CN202210062433 A CN 202210062433A CN 114527566 A CN114527566 A CN 114527566A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 33
- 230000003287 optical effect Effects 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 11
- 239000003292 glue Substances 0.000 claims description 8
- 239000000853 adhesive Substances 0.000 claims description 5
- 230000001070 adhesive effect Effects 0.000 claims description 5
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 230000036544 posture Effects 0.000 description 21
- 230000007547 defect Effects 0.000 description 2
- 229920006335 epoxy glue Polymers 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
- G02B26/10—Scanning systems
- G02B26/105—Scanning systems with one or more pivoting mirrors or galvano-mirrors
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
- G02B26/0816—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements
- G02B26/0833—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements the reflecting element being a micromechanical device, e.g. a MEMS mirror, DMD
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
- G02B26/10—Scanning systems
- G02B26/12—Scanning systems using multifaceted mirrors
- G02B26/121—Mechanical drive devices for polygonal mirrors
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- Optics & Photonics (AREA)
- Mechanical Optical Scanning Systems (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
The invention relates to the technical field of rotating mirrors, in particular to a manufacturing method of a rotating mirror device. The manufacturing method of the rotating mirror device comprises the following steps: putting n-surface reflectors into n reflector grooves of a rotating mirror frame, wherein the width of each reflector groove is greater than the thickness of each reflector; determining a projection plane and determining the positions of a laser and a rotating frame; opening a laser, adjusting a rotating frame to enable laser emitted by the laser to irradiate a reflector, fixing the reflector irradiated by the laser on the rotating frame, and marking a light spot position on a projection surface as a reference point; continuously adjusting the rotating frame for n-1 times, wherein the rotating angle of the rotating frame is adjusted each time
The posture of the reflector irradiated by the laser is adjusted once every time the adjustment of the rotating mirror frame is completed, so that the projection surface is provided with a projection planeThe light spot is coincided with the reference point, and the reflector which is adjusted is fixed on the rotating mirror frame. The manufacturing method of the rotating mirror device provided by the invention improves the attitude precision of each reflector on the rotating mirror device and reduces the error of the reflecting surface of the rotating mirror device.
Description
Technical Field
The invention relates to the technical field of rotating mirrors, in particular to a manufacturing method of a rotating mirror device.
Background
With the development of the times, the application of the laser radar is gradually widened, wherein the scanning laser radar is wide in application range and long in distance, uses few lasers, is dense in point cloud, and is gradually applied to multiple fields. The rotating mirror device is used as an important part of the scanning type laser radar, the rotating mirror device is provided with a plurality of reflecting surfaces which are uniformly distributed around a rotating shaft of the rotating mirror device, the plurality of reflecting surfaces can be enclosed into a regular polygon, and the precision of the reflecting surfaces has great influence on the accuracy and subsequent data processing of the scanning type laser radar, so that the error of each reflecting surface of the rotating mirror device is ensured to be very small when the rotating mirror device is manufactured.
At present, two manufacturing methods are generally adopted for the rotating mirror device, the first method is to directly process an aluminum block into the rotating mirror device by using a single-point diamond lathe, the required cost is high, the weight of the rotating mirror device is heavy, and the rotating mirror device is not practical for scanning laser radars used in batches; the second manufacturing method is to manufacture the rotating mirror frame and the reflective mirror, and then bond the reflective mirror on the rotating mirror frame, and the method has low cost and light weight, but the reflective mirror manufactured by the existing manufacturing method has low attitude precision, so that the error of the reflective surface of the rotating mirror device is large, and the precision of the scanning type laser radar is influenced.
In summary, it is an urgent technical problem to be solved by those skilled in the art how to overcome the above-mentioned defects of the conventional manufacturing method of the rotating mirror device.
Disclosure of Invention
The invention aims to provide a manufacturing method of a rotating mirror device, which is used for relieving the technical problem of larger error of a reflecting surface in the manufacturing method of the rotating mirror device in the prior art.
The invention provides a manufacturing method of a rotating mirror device, which comprises the following steps:
respectively placing n mirrors into n mirror grooves of a rotating mirror frame, wherein the width of each mirror groove is greater than the thickness of each mirror;
determining a projection plane and determining the positions of a laser and a rotating frame;
opening a laser, adjusting a rotating frame to enable laser emitted by the laser to irradiate a reflector, fixing the reflector irradiated by the laser on the rotating frame, and marking a spot position reflected to the projection surface by the reflector as a reference point;
continuously adjusting the rotating frame for n-1 times, wherein the rotating angle of the rotating frame is adjusted each time
And adjusting the posture of the reflector irradiated by the laser once every time the adjustment of the rotating mirror frame is finished, so that the light spot reflected to the projection surface by the reflector is coincided with the reference point, and the reflector which is adjusted is fixed on the rotating mirror frame.
Preferably, as an implementation mode, when the light spot reflected by the mirror onto the projection surface coincides with the reference point, the laser reflected by the mirror is perpendicular to the projection surface;
and/or when the light spot reflected to the projection surface by the reflector coincides with the reference point, the included angle between the laser emission direction of the laser and the reflector is 45 degrees.
Preferably, as an implementation mode, in the step of determining the positions of the laser and the rotating frame, the rotating shaft of the rotating frame is vertically arranged, and the laser emitting direction of the laser is a horizontal direction.
Before the step of fixing the laser-irradiated mirror to the turret, the manufacturing method further includes: and adjusting the posture of the reflector irradiated by the laser to enable the light spots reflected to the projection surface by the reflector to move to the horizontal plane where the emission port of the laser is located.
Preferably, as an implementation mode, the projection surface is a vertical surface, and/or the projection surface is a paper surface of coordinate paper.
Preferably, as an embodiment, the step of fixing the rotating frame comprises: and fixing the rotating mirror frame to the optical platform through an adjusting tool.
Preferably, as an implementable mode, adjust the frock including adjusting seat and scanning formula lidar's commentaries on classics mirror fixing base, it is used for fixing to change the mirror device to change the mirror fixing base, adjust the seat with change mirror fixing base fixed connection, it is used for fixing to optical platform to adjust the seat, change the mirror fixing base hang in optical platform's top.
Preferably, as an implementation manner, the adjusting the posture of the mirror irradiated by the laser once to make the light spot reflected by the mirror onto the projection surface coincide with the reference point, and the step of fixing the adjusted mirror to the mirror holder includes:
firstly, roughly adjusting the posture of the reflector irradiated by laser, enabling light spots reflected to the projection surface by the reflector to be close to the datum point, bonding a local area of the reflector irradiated by the laser to a rotating mirror frame, and preliminarily fixing the reflector irradiated by the laser so that the reflector irradiated by the laser can still move; and then finely adjusting the posture of the reflector irradiated by the laser to enable the light spot reflected to the projection surface by the reflector to coincide with the datum point, and firmly bonding the adjusted reflector to the rotating mirror frame.
Preferably, as an embodiment, in the step of bonding the partial area of the mirror irradiated with the laser to the mirror holder, the glue for bonding the mirror is an instant glue;
and/or in the step of firmly bonding the adjusted reflector to the rotating mirror frame, the glue for bonding the reflector is epoxy resin glue.
Preferably, as an implementation mode, when the light spot reflected by the reflecting mirror to the projection plane coincides with the reference point, the intersection point of the laser emitted by the laser and the reflecting mirror coincides with the central line of the reflecting mirror parallel to the rotating shaft of the rotating frame;
and/or the difference range of the width of the mirror groove and the thickness of the reflector is 0.2-0.3 mm;
and/or, n-4.
Preferably, as an implementation mode, before the step of placing the n-plane mirrors into the n mirror grooves of the rotating frame respectively, the manufacturing method further includes:
fixing the coded disc to the bottom of the rotating mirror frame; fixing the rotating lens frame on a motor shaft of the motor, so that a rotating shaft of the rotating lens frame is superposed with the motor shaft of the motor; electrically connecting the motor with the code disc;
the step of adjusting the rotatable frame comprises: and starting the motor, and driving the rotating mirror frame to rotate by using the motor.
Compared with the prior art, the invention has the beneficial effects that:
the manufacturing method of the rotating mirror device provided by the invention utilizes the reflection principle of the reflector, firstly, the reflector on one surface of the rotating mirror frame is rotated to the position capable of being irradiated by laser by adjusting the rotating mirror frame, the reflector is fixed, the position of the reflector at the moment is taken as a reference position, the position of a light spot reflected to a projection surface by the reference reflector is determined, and the reference reflector is marked as a reference point; then, the rotating lens frame is adjusted again to rotate the rotating lens frame
The angle of the angle adjusting device is that the reflectors on the rotating mirror frame can be enclosed into a regular polygon, so that the reflector on the other side can rotate to a reference position at the moment, the reference point marked on the projection surface in advance is used as a reference, the posture of the reflector at the reference position is adjusted until a light spot reflected by the reflector to the projection surface is superposed with the reference point, the reflector is fixed, at the moment, the posture of the reflector relative to the rotating mirror frame is the same as that of the reflector with the first surface fixed, other reflectors are sequentially rotated to the reference position, and the operation is repeated, so that the postures of the n reflectors on the rotating mirror frame relative to the rotating mirror frame can be consistent.
Therefore, the manufacturing method of the rotating mirror device provided by the invention improves the attitude precision of each reflector on the rotating mirror device, reduces the error of the reflecting surface of the rotating mirror device, and further can ensure the precision of the scanning type laser radar.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a flowchart of a method for manufacturing a turning mirror device according to an embodiment of the present invention;
fig. 2 is a structural layout diagram of a manufacturing method of a turning mirror device according to an embodiment of the present invention during operation;
fig. 3 is a schematic perspective view of an adjusting tool according to an embodiment of the present invention;
fig. 4 is a schematic perspective view of a mirror rotating device according to an embodiment of the present invention;
fig. 5 is a schematic perspective view of a rotatable mirror frame in the rotatable mirror device according to the embodiment of the present invention.
Description of reference numerals:
100-rotating mirror device; 110-rotating frame; 111-a scaffold; 112-a base; 113-diaphragm ring; 120-mirror; 130-code wheel; 140-a motor;
200-a projection plane;
300-a laser;
400-adjusting the tool; 410-an adjusting seat; 420-rotating mirror fixing seat.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "vertical", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, which are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The present invention will be described in further detail below with reference to specific embodiments and with reference to the attached drawings.
Referring to fig. 1 and fig. 2, the present embodiment provides a method for manufacturing a turning mirror device, which includes the following steps:
s102, the n-surface reflectors 120 are respectively placed into n mirror grooves of the rotary mirror frame 110, wherein the width of each mirror groove is larger than the thickness of each reflector 120.
After the reflective mirror 120 is placed in the mirror groove, the reflective mirror can rock in the mirror groove to provide an adjustable space for subsequent posture adjustment.
S104, determining the projection plane 200 and determining the positions of the laser 300 and the rotating lens frame 110.
S106, turning on the laser 300, adjusting the rotating frame 110 to make the laser emitted from the laser 300 irradiate the reflective mirror 120, fixing the reflective mirror 120 irradiated by the laser to the rotating frame 110, and marking the position of the light spot reflected by the reflective mirror 120 onto the projection plane 200 as a reference point.
By using the reflection principle of the reflective mirror 120, the reflective mirror 120 on one side of the rotatable mirror frame 110 is rotated to a position where the laser beam can be irradiated by adjusting the rotatable mirror frame 110, the reflective mirror 120 is fixed, and the position of the reflective mirror 120 at this time is used as a reference position, and the position of the light spot reflected by the reference reflective mirror 120 on the projection surface 200 is determined and marked as a reference point.
S108, continuing to adjust the rotating frame for n-1 times, and adjusting the rotating angle of the rotating frame 110 each timeDegree is all
Since each surface mirror 120 on the rotating frame 110 can be enclosed into a regular polygon, each time the rotating frame 110 is adjusted, one surface mirror 120 rotates to the reference position, and after n-1 times of adjustment, all the mirrors 120 stay at the reference position once.
S109, each time the adjustment of the mirror holder 110 is completed, the posture of the mirror 120 irradiated with the laser is adjusted so that the light spot reflected on the projection surface 200 by the mirror 120 coincides with the reference point, and the adjusted mirror 120 is fixed to the mirror holder 110.
The reference point marked on the projection surface 200 in advance is used as a reference, the posture of the reflective mirror 120 in the reference position is adjusted until the facula reflected by the reflective mirror 120 on the projection surface 200 coincides with the reference point, the reflective mirror 120 is fixed, at this time, the posture of the reflective mirror 120 relative to the mirror frame 110 is the same as that of the reflective mirror 120 with the first surface fixed, other reflective mirrors 120 are sequentially rotated to the reference position, and the operations are repeated, so that the postures of the n-surface reflective mirror 120 on the mirror frame 110 relative to the mirror frame 110 are consistent, therefore, the posture precision of each reflective mirror 120 on the mirror rotating device 100 can be improved, the error of the reflective surface of the mirror rotating device 100 is reduced, and the precision of the scanning type laser radar can be ensured.
In step S109, when the light spot reflected by the mirror 120 on the projection surface 200 coincides with the reference point, the laser reflected by the mirror 120 is perpendicular to the projection surface 200, so that the laser reflected by the mirror 120 can strike the projection surface 200 perpendicularly, which is convenient for reducing the area of the light spot, improving the marking accuracy, improving the alignment accuracy of the light spots reflected by other mirrors 120, and further improving the pose adjustment accuracy of other mirrors 120.
Further, when the spot reflected by the mirror 120 onto the projection surface 200 coincides with the reference point, the angle between the laser emission direction of the laser 300 and the mirror 120 may be set to 45 °.
In step S104, the rotating shaft of the rotating frame 110 is vertically disposed, so that the laser emitting direction of the laser 300 is horizontal, and thus, the laser reflected by the reflective mirror 120 should also be horizontal and at the same level as the laser emitted by the laser 300.
On the basis of the step S105, in the step S106, before the reflective mirror 120 is fixed, the posture of the reflective mirror 120 irradiated by the laser may be adjusted, so that the light spot reflected by the reflective mirror 120 onto the projection plane 200 moves to the horizontal plane where the emission port of the laser 300 is located, and thus, the parallelism between the reflective mirror 120 and the rotating shaft of the rotating frame 110 may be improved, and further, the reliability of the reference point may be improved, the probability that the light spots reflected by other reflective mirrors 120 may not move to the reference point may be reduced, the rework rate may be reduced, and the assembly efficiency of the rotating device 100 may be improved.
Preferably, the above projection surface 200 may be provided as a vertical surface, and thus, a standard horizontal line of the reference point may be easily determined.
Further, the projection plane 200 can be determined as the paper surface of the coordinate paper, so that the horizontal plane where the laser emitting port of the laser 300 is located can be directly determined through the coordinate paper, and the corresponding horizontal line on the coordinate paper is very intuitive.
Specifically, the coordinate paper can be pasted on a vertical wall surface.
The rotatable frame 110 can be secured to the optical platform by an adjustment tool 400 to accommodate the tabletop of the optical platform.
Specifically, the adjustment fixture 400 is first fixed to the optical platform, and then the rotating frame 110 is fixed to the adjustment fixture 400.
Referring to fig. 3, an adjusting seat 410 and a rotating mirror fixing seat 420 may be disposed in a specific structure of the adjusting tool 400, wherein the rotating mirror fixing seat 420 belongs to a structure of the scanning lidar for fixing the rotating mirror device 100, the adjusting seat 410 is fixedly connected to the rotating mirror fixing seat 420, the adjusting seat 410 is fixed to the optical platform, the rotating mirror fixing seat 420 is suspended above the optical platform by the adjusting seat 410, so as to adapt to the specific structure of the rotating mirror device 100, and the rotating mirror fixing seat 420 belongs to the structure of the scanning lidar, so that no additional processing is required, the adjusting seat 410 is only required to be additionally processed, so as to indirectly fix the rotating mirror fixing seat 420 and the optical platform by the adjusting seat 410, and the cost is low.
Specifically, the adjusting base 410 may be an L-shaped fixing block, and the rotating mirror fixing base 420 may be installed in an L-shaped groove of the L-shaped fixing block.
The adjusting base 410 is connected with the optical platform through a threaded connector, and the rotating mirror fixing base 420 is connected with the adjusting base 410 through a threaded connector.
In step S109, the step of adjusting the posture of the mirror 120 may specifically include: firstly, roughly adjusting the posture of the reflector 120 irradiated by laser, enabling light spots reflected to the projection surface 200 by the reflector 120 to be close to a reference point, adhering a local area of the reflector 120 irradiated by the laser to the rotating frame 110, and preliminarily fixing to enable the reflector 120 irradiated by the laser to still move; then, the posture of the mirror 120 irradiated with the laser is finely adjusted so that the spot reflected on the projection surface 200 by the mirror 120 coincides with the reference point, and the adjusted mirror 120 is firmly adhered to the mirror holder 110.
It should be noted that when the light spot reflected by the reflective mirror 120 on the projection surface 200 is close to the reference point, a local area of the reflective mirror 120 is bonded to the rotary mirror bracket 110, so that the adjustable amplitude of the reflective mirror 120 in the adjustment process can be reduced; on the basis, the reflector 120 is finely adjusted, so that the reflector 120 can be quickly determined to be in the target posture, and the adjustment efficiency of the reflector 120 is improved.
Preferably, the local area of the mirror 120 irradiated by the laser may be bonded to the mirror housing 110 by using an instant adhesive, so that the waiting time of the adhesive is shortened, and the adjustment efficiency of the mirror 120 is improved.
The adjusted mirror 120 may be securely attached to the turret frame 110 using an epoxy glue.
The position of the mirror 120 where the first face is rotated to be opposed to the laser light emitted from the laser 300 can be determined according to the following conditions: when the spot reflected by the mirror 120 onto the projection surface 200 coincides with the reference point, the intersection of the laser light emitted from the laser 300 and the mirror 120 coincides with the center line of the mirror 120 parallel to the rotation axis of the mirror holder 110. After the first surface is rotated to the position of the mirror 120 opposite to the laser light emitted from the laser 300 is determined, the positions of the other mirrors 120 also satisfy the above condition.
Preferably, the difference between the width of the mirror groove of the rotatable frame 110 and the thickness of the reflective mirror 120 is set to 0.2-0.3mm, which is convenient for ensuring the adjustability and adjusting to the target posture.
Specifically, the number of mirrors 120 on the mirror housing 110 may be set to 4.
Referring to fig. 4, before the above step S102, a step S101 may be added: fixing the code wheel 130 to the bottom of the rotating mirror frame 110; fixing the rotating frame 110 on the motor 140, and enabling a rotating shaft of the rotating frame 110 to coincide with a motor shaft of the motor 140; the motor 140 is electrically connected to the code wheel 130 to provide the motor 140 with rotation angle information using the code wheel 130, ensuring that the motor 140 rotates by a predetermined angle.
In addition to the addition of step S101, the step of adjusting the rotating frame 110 in step S106 and step S108 includes: the motor 140 is started, and the rotating frame 110 is driven to rotate by the motor 140, so that the rotating frame 110 can be precisely rotated by setting the rotating angle of the motor 140
The degree of mechanization is high, the rotating mirror frame 110 does not need to be rotated manually, the motor 140 and the code wheel 130 originally belong to a part of the rotating mirror device 100, and the motor 140 and the code wheel 130 do not need to be disassembled after the fixing of the reflective mirror 120 is completed.
Specifically, the code wheel 130 may be affixed to the bottom of the swivel frame 110; the turret frame 110 may be affixed to the motor 140.
Specifically, referring to fig. 4 and 5, the rotating frame 110 includes three parts, namely a bracket 111, a base 112 and a diaphragm 113, the base 112 is fixed at the bottom of the bracket 111 by screws, when the reflector 120 is assembled, the diaphragm 113 slides to and is clamped by a convex structure in the middle of the bracket 111, and the diaphragm 113 is adhered and fixed with the bracket 111 by epoxy glue.
To further explain the present invention more specifically, a turning mirror device 100 having a four-sided mirror 120 is taken as an example, and a more specific example is given as follows:
s202, fixing the adjusting tool 400 on an optical platform, then placing the laser 300 at a position adjacent to the adjusting tool 400, and finally attaching coordinate paper to a wall 2 meters away from the optical platform and perpendicular to the ground.
S204, the coded disc 130 is attached to the bottom of the rotating frame 110, then the rotating frame 110 is fixed on the motor 140 through glue, and finally the whole module (comprising the rotating frame 110, the motor 140 and the coded disc 130) is installed on the adjusting tool 400 and connected with the circuit tool module.
S206, the four-side reflectors 120 are respectively placed in the four mirror grooves of the rotating mirror frame 110, then the laser 300 is turned on, the light beam vertically irradiates the rotating mirror device 100, and the rotating mirror frame 110 is adjusted to a 45-degree angle, opposite to the light beam, of the first reflector. The laser vertically irradiates the first reflective mirror, and is reflected to coordinate paper on an outer wall of 2 meters, and the laser-irradiated light spot of the coordinate paper is marked as a reference point.
S208, rotating the rotating frame 110 by 90 degrees, enabling the second reflector to face the light beam by an angle of 45 degrees, taking the reference point marked on the coordinate paper as a standard, adjusting the posture of the second reflector, enabling the light spot reflected by the second reflector to the coordinate paper to be close to the reference point, and firstly dipping a small amount of instant adhesive by using a dispensing head to preliminarily fix the second reflector; then the angle of the second reflector is corrected in a small range, so that light spots reflected to the coordinate paper by the second reflector coincide with the datum points, and finally the second reflector is completely fixed to the rotating mirror frame 110 through epoxy resin glue.
And S210, sequentially adjusting the third reflector and the fourth reflector according to the step S208.
The first reflective mirror, the second reflective mirror, the third reflective mirror and the fourth reflective mirror are sequentially arranged along the rotation direction of the rotating mirror frame 110.
In summary, the embodiment of the present invention discloses a method for manufacturing a turning mirror device, which overcomes many technical defects of the conventional method for manufacturing a turning mirror device. The manufacturing method of the rotating mirror device provided by the embodiment of the invention improves the attitude precision of each reflective mirror 120 on the rotating mirror device 100, reduces the error of the reflective surface of the rotating mirror device 100, and further can ensure the precision of the scanning type laser radar.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and these modifications or substitutions do not depart from the spirit of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A method for manufacturing a rotating mirror device is characterized by comprising the following steps:
respectively placing n-surface reflectors (120) into n reflector grooves of a rotating mirror frame (110), wherein the width of each reflector groove is larger than the thickness of each reflector (120);
determining a projection plane (200), and determining the positions of the laser (300) and the rotating lens frame (110);
turning on a laser (300), adjusting a rotating mirror frame (110), enabling laser emitted by the laser (300) to irradiate a reflective mirror (120), fixing the reflective mirror (120) irradiated by the laser to the rotating mirror frame (110), and marking the position of a light spot reflected to the projection surface (200) by the reflective mirror (120) as a reference point;
continuously adjusting the rotating frame (110) for n-1 times, wherein the rotating angle of the rotating frame (110) is adjusted each time
And adjusting the posture of the reflector (120) irradiated by the laser once every time the adjustment of the rotating mirror frame (110) is completed, so that the light spot reflected to the projection surface (200) by the reflector (120) is coincided with the reference point, and fixing the adjusted reflector (120) on the rotating mirror frame (110).
2. The manufacturing method according to claim 1, wherein when the spot reflected by the mirror (120) onto the projection surface (200) coincides with the reference point, the laser light reflected by the mirror (120) is perpendicular to the projection surface (200);
and/or when the light spot reflected to the projection surface (200) by the reflector (120) is coincident with the reference point, the laser emission direction of the laser (300) and the reflector (120) form an included angle of 45 degrees.
3. The manufacturing method according to claim 1, wherein in the step of determining the positions of the laser (300) and the rotating mirror holder (110), the rotating shaft of the rotating mirror holder (110) is vertically arranged, and the laser emitting direction of the laser (300) is a horizontal direction;
before the step of fixing the laser-irradiated mirror (120) to the mirror holder (110), the manufacturing method further includes: and adjusting the posture of the reflector (120) irradiated by the laser to enable the light spot reflected to the projection surface (200) by the reflector (120) to move to the horizontal plane where the emission port of the laser (300) is positioned.
4. A method according to claim 3, wherein the projection surface (200) is a vertical surface, and/or the projection surface (200) is a surface of a graph paper.
5. The method of manufacturing of claim 3, wherein the step of securing the rotatable frame (110) comprises: the rotating frame (110) is fixed to the optical platform through an adjusting tool (400).
6. The manufacturing method according to claim 5, wherein the adjusting tool (400) comprises an adjusting seat (410) and a rotating mirror fixing seat (420) of the scanning lidar, the rotating mirror fixing seat (420) is used for fixing the rotating mirror device (100), the adjusting seat (410) is fixedly connected with the rotating mirror fixing seat (420), the adjusting seat (410) is used for being fixed on an optical platform, and the rotating mirror fixing seat (420) is suspended above the optical platform.
7. The manufacturing method according to claim 1, wherein the step of adjusting the posture of the mirror (120) irradiated with the laser light once so that the spot reflected on the projection surface (200) by the mirror (120) coincides with the reference point, and the step of fixing the adjusted mirror (120) to the mirror holder (110) comprises:
firstly, roughly adjusting the posture of the reflector (120) irradiated by laser, enabling light spots reflected to the projection surface (200) by the reflector (120) to be close to the datum point, adhering a local area of the reflector (120) irradiated by the laser to a rotating mirror frame (110), and preliminarily fixing to enable the reflector (120) irradiated by the laser to be still movable; then, the posture of the reflector (120) irradiated by the laser is finely adjusted, so that the light spot reflected to the projection surface (200) by the reflector (120) is superposed with the reference point, and the adjusted reflector (120) is firmly adhered to the rotating frame (110).
8. The manufacturing method according to claim 7, wherein in the step of bonding the partial region of the mirror (120) irradiated with the laser to the mirror holder (110), the adhesive for bonding the mirror (120) is an instant adhesive;
and/or in the step of firmly bonding the adjusted reflector (120) to the rotating frame (110), the glue for bonding the reflector (120) is epoxy resin glue.
9. The manufacturing method according to claim 1, wherein when the spot reflected by the mirror (120) onto the projection surface (200) coincides with the reference point, an intersection point of the laser light emitted by the laser (300) and the mirror (120) coincides with a center line of the mirror (120) parallel to the rotation axis of the mirror holder (110);
and/or the difference between the width of the mirror groove and the thickness of the reflector (120) ranges from 0.2 mm to 0.3 mm;
and/or, n-4.
10. The method of any of claims 1-9, wherein prior to the step of placing each of the n-sided mirrors (120) into the n mirror grooves of the mirror support (110), the method further comprises:
fixing the code disc (130) to the bottom of the rotating mirror frame (110); fixing the rotating frame (110) on a motor shaft of the motor (140) to enable a rotating shaft of the rotating frame (110) to be superposed with the motor shaft of the motor (140); electrically connecting a motor (140) with the code wheel (130);
the step of adjusting the rotatable frame (110) comprises: the motor (140) is started, and the rotating frame (110) is driven to rotate by the motor (140).
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| CN116990959A (en) * | 2023-09-25 | 2023-11-03 | 深圳市镭神智能***有限公司 | Rotary mirror, lens mounting method thereof, laser radar scanning system and laser radar |
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