CN106694472A - Handheld type linear light source laser head and laser cleaning method thereof - Google Patents
Handheld type linear light source laser head and laser cleaning method thereof Download PDFInfo
- Publication number
- CN106694472A CN106694472A CN201710135416.8A CN201710135416A CN106694472A CN 106694472 A CN106694472 A CN 106694472A CN 201710135416 A CN201710135416 A CN 201710135416A CN 106694472 A CN106694472 A CN 106694472A
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- CN
- China
- Prior art keywords
- light
- laser
- galvanometer
- directional light
- spot
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
- B08B7/0035—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by radiant energy, e.g. UV, laser, light beam or the like
- B08B7/0042—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by radiant energy, e.g. UV, laser, light beam or the like by laser
-
- 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
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/48—Laser speckle optics
Abstract
The invention provides a handheld type linear light source laser head and a laser cleaning method thereof. The linear light spot energy can be uniform, substrate burning or incomplete cleaning is prevented, and the laser cleaning effect is improved. The laser cleaning method of the handheld type linear light source laser head includes the steps that initial light coming from a laser device is transmitted through optical fiber; the initial light is collimated through a collimating lens to obtain parallel light; the parallel light is reflected into parallel light swinging in a reciprocating manner through a galvanometer rotating in a reciprocating manner; the parallel light swinging in the reciprocating manner is focused through a focus lens so that linear light spots can be formed on a focus plane; and by means of a light outlet control unit, the laser device is allowed to emit light in the uniform-velocity rotation process of the galvanometer, and the laser device is forbidden to emit light in the variable-velocity rotation process of the galvanometer.
Description
Technical field
The present invention relates to laser cleaning technique, more particularly to a kind of hand-held line source laser head and its laser cleaning side
Method.
Background technology
Laser cleaning technique, be removed using the Photophysical Behaviors of laser the oxide layer of workpiece surface, skin of paint or its
His pollution layer.Its physical principle can be summarized as follows：
A) light beam of laser transmitting is absorbed by the pollution layer that need to be processed on surface.
B) absorption of big energy forms the plasma (the unstable gas of highly ionized) for drastically expanding, and produces impact
Ripple.
C) shock wave makes pollutant change fragmentate and be removed.
D) light impulse length must be short enough, with the heat accumulation for avoiding being destroyed processed surface.
E) experiment shows that, when there is oxide on metal surface, plasma results from metal surface.
Wherein, plasma is only produced in the case where energy density is higher than threshold value, and this threshold value depends on removed
Pollution layer or oxide layer.This threshold effect is extremely important to effectively being cleaned in the case where base material safety is ensured.
Also there is second threshold value in the appearance of plasma.If energy density exceedes this threshold value, base material will be destroyed.For
Effective cleaning is carried out on the premise of base material safety is ensured, it is necessary to according to circumstances adjust laser parameter, make light pulse
Energy density is strictly between two threshold values.
In the prior art, in order to keep the laser to have enough energy, typically from optical fiber out focus on after hot spot all very
Small, only 1 to 4 millimeters, this causes cleaning area too small, and cleaning speed declines.Therefore, can be by the galvanometer of reciprocating rotation, will
Point hot spot high speed swinging after focusing, forms the linear light spot of high-velocity scanning, to increase cleaning efficiency, but, because in the presence of swing
When speed change, line light spot energy can be caused uneven, influence cleaning quality.
The content of the invention
The invention aims to provide a kind of hand-held line source laser head and its laser cleaning method, line is enabled to
Light spot energy is uniform, prevents matrix or cleaning dirty of burning, the effect of improving laser cleaning.
To achieve these goals, the invention provides a kind of laser cleaning method of hand-held line source laser head, bag
Include：
Come from the initial light of laser by Optical Fiber Transmission；
The initial light is collimated by collimating mirror, obtains directional light；
By the galvanometer of reciprocating rotation, the directional light is reflected into the directional light of reciprocally swinging；
By focus lamp, the directional light to the reciprocally swinging is focused, and line spot is formed on focussing plane；
By going out light control unit, the laser light extraction is allowed during the galvanometer uniform rotation, shaken described
Forbid the laser light extraction in mirror speed change rotation process.
Preferably, in above-mentioned laser cleaning method, the collimating mirror is arranged on the optical fiber port of the optical fiber.
Preferably, in above-mentioned laser cleaning method, the spot diameter of the directional light is 20-25 millimeters.
Preferably, in above-mentioned laser cleaning method, the width of the line spot is 0.5-3 millimeters, and length is 70-
100 millimeters.
In order to preferably realize the purpose of the present invention, present invention also offers a kind of hand-held line source laser head, including：
Optical fiber, is used for：Transmission comes from the initial light of laser；
Collimating mirror, is used for：The initial light is collimated, directional light is obtained；
The galvanometer of reciprocating rotation, is used for：The directional light is reflected into the directional light of reciprocally swinging；
Focus lamp, is used for：Directional light to the reciprocally swinging is focused, and line spot is formed on focussing plane；
Go out light control unit, be used for：The laser light extraction is allowed during the galvanometer uniform rotation, is shaken described
Forbid the laser light extraction in mirror speed change rotation process.
Preferably, in above-mentioned hand-held line source laser head, the collimating mirror is arranged on the optical fiber port of the optical fiber.
Preferably, in above-mentioned hand-held line source laser head, the spot diameter of the directional light is 20-25 millimeters.
Preferably, in above-mentioned hand-held line source laser head, the width of the line spot is 0.5-3 millimeters, length
It is 70-100 millimeters.
Preferably, in above-mentioned hand-held line source laser head, also include：
Adjustment unit, the length for adjusting the line spot.
The embodiment of the present invention has following technique effect：
1) in the embodiment of the present invention, laser light extraction is controlled by going out light control unit, is only at the uniform velocity turned in galvanometer
Light extraction is just allowed when dynamic, therefore, the directional light after galvanometer reflects is also uniform rotation, and it is linear that it is formed after being focused
Spot energy distribution is substantially uniform.
2) in the embodiment of the present invention, only by photocontrol is simply gone out, the uniform rotation stage of galvanometer is just have chosen, is entered
And have chosen the directional light of uniform rotation so that line spot Energy distribution is substantially uniform, and control is simple, low cost, with simple
Reliable way just obtains the line spot of basic energy balance.
3) in the embodiment of the present invention, the length of line spot can be adjusted, with more preferable adaptability.
According to the accompanying drawings to the detailed description of the specific embodiment of the invention, those skilled in the art will be brighter
Of the invention above-mentioned and other purposes, advantages and features.
Brief description of the drawings
Describe some specific embodiments of the invention in detail by way of example, and not by way of limitation with reference to the accompanying drawings hereinafter.
Identical reference denotes same or similar part or part in accompanying drawing.It should be appreciated by those skilled in the art that these
What accompanying drawing was not necessarily drawn to scale.In accompanying drawing：
The step of Fig. 1 is the inventive method embodiment flow chart；
Fig. 2 is the structural representation of hand-held line source laser head embodiment of the present invention.
Specific embodiment
The step of Fig. 1 is an embodiment of the method for the invention flow chart, as shown in figure 1, the embodiment of the present invention provides a kind of
The laser cleaning method of hand-held line source laser head, it includes：
Step 101, the initial light of laser is come from by Optical Fiber Transmission；
Step 102, is collimated by collimating mirror to the initial light, obtains directional light；
Step 103, by the galvanometer of reciprocating rotation, the directional light is reflected into the directional light of reciprocally swinging；
Step 104, by focus lamp, the directional light to the reciprocally swinging is focused, and line is formed on focussing plane
Shape hot spot；
Step 105, by going out light control unit, allows the laser light extraction during the galvanometer uniform rotation,
Forbid the laser light extraction in the galvanometer speed change rotation process.
It can be seen that, in the embodiment of the present invention, laser light extraction is controlled by going out light control unit, only in galvanometer at the uniform velocity
Light extraction is just allowed when rotation, therefore, the directional light after galvanometer reflects is also uniform rotation, its line formed after being focused
Shape spot energy distribution is substantially uniform.
In an embodiment of the method for the invention, the collimating mirror is arranged on the optical fiber port of the optical fiber.The directional light
Spot diameter be 20-25 millimeters.The width of the line spot is 0.5-3 millimeters, and length is 70-100 millimeters.
Fig. 2 is the structural representation of hand-held line source laser head embodiment of the present invention, as shown in Fig. 2 a kind of hand-held
Line source laser head, including：
Optical fiber 210, is used for：Transmission comes from the initial light of laser；
Collimating mirror 220, is used for：The initial light is collimated, directional light is obtained；
The galvanometer 230 of reciprocating rotation, is used for：The directional light is reflected into the directional light of reciprocally swinging；
Focus lamp 240, is used for：Directional light to the reciprocally swinging is focused, and linear light is formed on focussing plane
Spot；
Go out light control unit 250, be used for：The laser light extraction is allowed during the galvanometer uniform rotation, in institute
State during galvanometer speed change is rotated (such as accelerate to rotate or underdrive) and forbid the laser light extraction.
In the embodiment of hand-held linear light source laser of the invention, the collimating mirror 220 is arranged on the optical fiber
Optical fiber port 211.
The spot diameter of the directional light is 20-25 millimeters.The width of the line spot is 0.5-3 millimeters, and length is
70-100 millimeters.For example, when from 300mm lens focus, the length of line spot is about 100mm；Selecting 200mm lens
During focusing, the length of line spot is about 70mm.
In the embodiment of hand-held linear light source laser of the invention, also include：Adjustment unit, for adjusting the line
The length of shape hot spot.For example, by the length for controlling the hard-over of galvanometer to control shape hot spot, or by controlling light extraction
Time interval, galvanometer swing an angular interval in the range of just allow light extraction, so as to control the length of line spot.
In the embodiment of hand-held linear light source laser of the invention, in order to the energy of line spot is more uniform, need
Each point of focus after focusing in line spot stops identical duration, that is, the focus for moving is within the unit interval
Inswept identical length is wanted as far as possible, and the position of focus is L*sin α, wherein α is angle, the rotational angular velocity phase with galvanometer
Close；L is distance of the galvanometer to focus lamp, therefore, it can control the rotational angular velocity of galvanometer to offset the sinusoidal influence,
So that each point of focus in line spot stops identical duration.It is, therefore, possible to provide a rotation that galvanometer can be controlled
The pivoting controller of angular speed, a default rotation curve for offsetting the sinusoidal influence so that mobile focus is in list
Inswept identical length is wanted in the time of position as far as possible.Certainly, this can increased control difficulty and control cost.
From the foregoing, it will be observed that the present invention has the advantage that：
1) in the embodiment of the present invention, laser light extraction is controlled by going out light control unit, is only at the uniform velocity turned in galvanometer
Light extraction is just allowed when dynamic, therefore, the directional light after galvanometer reflects is also uniform rotation, and it is linear that it is formed after being focused
Spot energy distribution is substantially uniform.
2) in the embodiment of the present invention, only by photocontrol is simply gone out, the uniform rotation stage of galvanometer is just have chosen, is entered
And have chosen the directional light of uniform rotation so that line spot Energy distribution is substantially uniform, and control is simple, low cost, with simple
Reliable way just obtains the line spot of basic energy balance.
3) in the embodiment of the present invention, the length of line spot can be adjusted, with more preferable adaptability.
So far, although those skilled in the art will appreciate that detailed herein have shown and described multiple of the invention and show
Example property embodiment, but, without departing from the spirit and scope of the present invention, still can be direct according to present disclosure
It is determined that or deriving many other variations or modifications for meeting the principle of the invention.Therefore, the scope of the present invention is understood that and recognizes
It is set to and covers all these other variations or modifications.
Claims (9)
1. a kind of laser cleaning method of hand-held line source laser head, it is characterised in that including：
Come from the initial light of laser by Optical Fiber Transmission；
The initial light is collimated by collimating mirror, obtains directional light；
By the galvanometer of reciprocating rotation, the directional light is reflected into the directional light of reciprocally swinging；
By focus lamp, the directional light to the reciprocally swinging is focused, and line spot is formed on focussing plane；
By going out light control unit, the laser light extraction is allowed during the galvanometer uniform rotation, become in the galvanometer
Forbid the laser light extraction in fast rotation process.
2. laser cleaning method according to claim 1, it is characterised in that the collimating mirror is arranged on the light of the optical fiber
Fine mouth.
3. laser cleaning method according to claim 1, it is characterised in that
The spot diameter of the directional light is 20-25 millimeters.
4. laser cleaning method according to claim 3, it is characterised in that
The width of the line spot is 0.5-3 millimeters, and length is 70-100 millimeters.
5. a kind of hand-held line source laser head, it is characterised in that including：
Optical fiber, is used for：Transmission comes from the initial light of laser；
Collimating mirror, is used for：The initial light is collimated, directional light is obtained；
The galvanometer of reciprocating rotation, is used for：The directional light is reflected into the directional light of reciprocally swinging；
Focus lamp, is used for：Directional light to the reciprocally swinging is focused, and line spot is formed on focussing plane；
Go out light control unit, be used for：The laser light extraction is allowed during the galvanometer uniform rotation, is become in the galvanometer
Forbid the laser light extraction in fast rotation process.
6. hand-held line source laser head according to claim 5, it is characterised in that the collimating mirror is arranged on the light
Fine optical fiber port.
7. hand-held line source laser head according to claim 5, it is characterised in that
The spot diameter of the directional light is 20-25 millimeters.
8. hand-held line source laser head according to claim 7, it is characterised in that
The width of the line spot is 0.5-3 millimeters, and length is 70-100 millimeters.
9. hand-held line source laser head according to claim 7, it is characterised in that also include：
Adjustment unit, the length for adjusting the line spot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710135416.8A CN106694472A (en) | 2017-03-09 | 2017-03-09 | Handheld type linear light source laser head and laser cleaning method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710135416.8A CN106694472A (en) | 2017-03-09 | 2017-03-09 | Handheld type linear light source laser head and laser cleaning method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106694472A true CN106694472A (en) | 2017-05-24 |
Family
ID=58912461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710135416.8A Pending CN106694472A (en) | 2017-03-09 | 2017-03-09 | Handheld type linear light source laser head and laser cleaning method thereof |
Country Status (1)
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108856175A (en) * | 2018-07-17 | 2018-11-23 | 武汉锐科光纤激光技术股份有限公司 | A kind of laser cleaning system and its cleaning method |
| CN109433743A (en) * | 2018-12-11 | 2019-03-08 | 山东省科学院激光研究所 | Laser cleaning device and method |
| CN109848535A (en) * | 2018-12-28 | 2019-06-07 | 北京工业大学 | A kind of the electrode laser repair system and method for electric resistance welding equipment |
| CN110125096A (en) * | 2019-06-06 | 2019-08-16 | 哈尔滨工业大学 | A kind of laser composite cleaning system and method |
| WO2020008398A1 (en) | 2018-07-03 | 2020-01-09 | Andritz Ag | Laser apparatus and method |
| CN114505575A (en) * | 2021-12-30 | 2022-05-17 | 武汉奥森迪科智能科技股份有限公司 | Vibrating mirror driving method with uniform energy distribution and laser processing head thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020008398A1 (en) | 2018-07-03 | 2020-01-09 | Andritz Ag | Laser apparatus and method |
| CN108856175A (en) * | 2018-07-17 | 2018-11-23 | 武汉锐科光纤激光技术股份有限公司 | A kind of laser cleaning system and its cleaning method |
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| CN109848535A (en) * | 2018-12-28 | 2019-06-07 | 北京工业大学 | A kind of the electrode laser repair system and method for electric resistance welding equipment |
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| CN114505575A (en) * | 2021-12-30 | 2022-05-17 | 武汉奥森迪科智能科技股份有限公司 | Vibrating mirror driving method with uniform energy distribution and laser processing head thereof |
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