CN111451218A - Method for generating combined laser, laser and laser cleaning method - Google Patents
Method for generating combined laser, laser and laser cleaning method Download PDFInfo
- Publication number
- CN111451218A CN111451218A CN202010292082.7A CN202010292082A CN111451218A CN 111451218 A CN111451218 A CN 111451218A CN 202010292082 A CN202010292082 A CN 202010292082A CN 111451218 A CN111451218 A CN 111451218A
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- CN
- China
- Prior art keywords
- laser
- laser beam
- annular
- gaussian
- combined
- Prior art date
- 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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Links
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000004140 cleaning Methods 0.000 title claims description 21
- 230000005855 radiation Effects 0.000 claims description 7
- 239000003973 paint Substances 0.000 claims description 3
- 239000000356 contaminant Substances 0.000 claims 1
- 238000011109 contamination Methods 0.000 claims 1
- 101100356682 Caenorhabditis elegans rho-1 gene Proteins 0.000 description 8
- 230000000694 effects Effects 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Classifications
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- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/005—Optical devices external to the laser cavity, specially adapted for lasers, e.g. for homogenisation of the beam or for manipulating laser pulses, e.g. pulse shaping
- H01S3/0071—Beam steering, e.g. whereby a mirror outside the cavity is present to change the beam direction
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/23—Arrangements of two or more lasers not provided for in groups H01S3/02 - H01S3/22, e.g. tandem arrangements of separate active media
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Cleaning In General (AREA)
Abstract
The invention provides a method for generating combined laser, which is characterized by comprising the following steps of: generating a ring-shaped laser beam by a first laser generator; generating a Gaussian laser beam by a second laser generator, wherein the outer ring energy intensity of the Gaussian laser beam is less than the average energy intensity of the annular laser beam and the central energy intensity of the Gaussian laser beam is greater than the average energy intensity of the annular laser beam; and combining the annular laser beam and the Gaussian laser beam into combined laser through a laser beam combiner, wherein the annular laser beam surrounds the Gaussian laser beam.
Description
Technical Field
The invention relates to the field of laser, in particular to a method for generating combined laser, a laser and a laser cleaning method.
Background
In the field of laser cleaning, a continuous laser beam generated in laser cleaning equipment is generally a Gaussian laser beam, and the Gaussian laser beam is characterized in that the energy density of the center of a laser spot is high, the energy density of the periphery of the laser spot is low, so that a contaminated layer can be cleaned just around the spot in the cleaning process, and the center of the spot damages a cleaning substrate due to too high energy; or the center of the light spot can just clean the pollution layer, and the part around the light spot is not cleaned due to lower energy; at present, some devices convert a gaussian laser beam into an annular laser beam with uniform energy density through a shaping system, but the annular laser beam has a blind zone, so that a method capable of generating a laser beam with uniform energy distribution is needed.
Disclosure of Invention
The invention provides a method for generating combined laser, a laser and a laser cleaning method, wherein the energy distribution of laser beams is uniform, and the cleaning effect is similar so as to avoid damaging a base material.
The invention firstly provides a method for generating combined laser, which comprises the following steps:
generating a ring-shaped laser beam by a first laser generator;
generating a Gaussian laser beam by a second laser generator, wherein the outer ring energy intensity of the Gaussian laser beam is less than the average energy intensity of the annular laser beam and the central energy intensity of the Gaussian laser beam is greater than the average energy intensity of the annular laser beam;
and combining the annular laser beam and the Gaussian laser beam into combined laser through a laser beam combiner, wherein the annular laser beam surrounds the Gaussian laser beam.
Further, the average power density of the annular laser beam is rho 1, the average power density of the Gaussian laser beam is rho 2, and rho 1 is larger than or equal to rho 2.
The method further comprises the step of focusing the combined laser, wherein a radiation surface focused by the combined laser comprises a circular light spot and an annular light spot surrounding the circular light spot, and the gap between the annular light spot and the circular light spot is 0-0.4 mm.
Further, the inner diameter of the annular light spot is 0.4-0.8mm, the diameter of the circular light spot is 0.2-0.4mm, and the annular width of the annular light spot is 0.2-0.4 mm.
The invention also provides a laser cleaning method, which is used for cleaning the pollution layer by the combined laser generated by the combined laser generating method.
The invention also provides a laser, which comprises a first laser generator, a second laser generator and a laser beam combiner, wherein the first laser generator is used for generating an annular laser beam, the second laser generator is used for generating a Gaussian laser beam, the laser beam combiner is used for combining the annular laser beam and the Gaussian laser beam into combined laser, the annular laser beam surrounds the Gaussian laser beam, the outer ring energy intensity of the Gaussian laser beam is smaller than the average energy intensity of the annular laser beam, and the central energy intensity of the Gaussian laser beam is larger than the average energy intensity of the annular laser beam.
Further, the average power density of the annular laser beam is rho 1, the average power density of the Gaussian laser beam is rho 2, and rho 1 is larger than or equal to rho 2.
The laser beam combining device comprises a laser beam combining device, a focusing device and a radiation surface, wherein the focusing device is used for focusing the combined laser beam, the radiation surface focused by the combined laser beam comprises a circular light spot and an annular light spot surrounding the circular light spot, and the gap between the annular light spot and the circular light spot is 0-0.4 mm.
Further, the inner diameter of the annular light spot is 0.4-0.8mm, the diameter of the circular light spot is 0.2-0.4mm, and the annular width of the annular light spot is 0.2-0.4 mm.
The invention also provides a laser cleaning method, which is used for cleaning a pollution layer by the combined laser generated by the laser, wherein the pollution layer can be paint, an oxidation layer and other pollutants.
According to the invention, the annular laser beam and the Gaussian laser beam are combined into the combined laser, and the average energy intensity of the annular laser beam is set to be greater than the outer ring energy intensity of the Gaussian laser beam and less than the central energy intensity of the Gaussian laser beam, so that the energy distribution of the combined laser is more uniform, and the cleaning effect is more similar.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It should also be noted that, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections; either mechanically or electrically, and may be internal to both 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 terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
It should also be noted that in the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The invention provides a method for generating combined laser, which comprises the following steps:
a ring-shaped laser beam is generated by a first laser generator.
And generating a Gaussian laser beam by the second laser generator, wherein the outer ring energy intensity of the Gaussian laser beam is less than the average energy intensity of the annular laser beam, and the central energy intensity of the Gaussian laser beam is greater than the average energy intensity of the annular laser beam.
The ring laser beam and the Gaussian laser beam are combined into combined laser through the laser beam combiner, and the ring laser beam surrounds the Gaussian laser beam.
The central energy intensity of the cross section of the Gaussian laser beam is high, and the peripheral energy intensity is low; the energy intensity of the cross section of the annular laser beam is uniform, and the problem of low energy intensity of the outer ring of the Gaussian laser beam is solved by utilizing the energy intensity of the inner ring of the annular laser beam, so that the energy distribution of the combined laser beam is relatively uniform, and the cleaning effect is relatively similar.
Specifically, the average power density of the annular laser beam is rho 1, the average power density of the Gaussian laser beam is rho 2, and rho 1 is not less than rho 2.
Specifically, the method further comprises the step of focusing the combined laser, wherein the radiation surface focused by the combined laser comprises a circular light spot and an annular light spot surrounding the circular light spot, and the gap between the annular light spot and the circular light spot is 0-0.4 mm.
Preferably, the inner diameter of the annular light spot is 0.4-0.8mm, the diameter of the circular light spot is 0.2-0.4mm, and the annular width of the annular light spot is 0.2-0.4 mm.
The invention also provides a laser cleaning method, which is used for cleaning the pollution layer by using the combined laser.
The invention provides a laser which comprises a first laser generator, a second laser generator and a laser beam combiner, wherein the first laser generator is used for generating an annular laser beam, the second laser generator is used for generating a Gaussian laser beam, the laser beam combiner is used for combining the annular laser beam and the Gaussian laser beam into combined laser, and the annular laser beam surrounds the Gaussian laser beam.
Specifically, the average power density of the annular laser beam is rho 1, the average power density of the Gaussian laser beam is rho 2, and rho 1 is not less than rho 2.
The laser beam combining device comprises a focusing device, the focusing device is used for focusing combined laser, a radiation surface focused by the combined laser comprises a circular light spot and an annular light spot surrounding the circular light spot, and the gap between the annular light spot and the circular light spot is 0-0.4 mm.
Preferably, the inner diameter of the annular light spot is 0.4-0.8mm, the diameter of the circular light spot is 0.2-0.4mm, and the annular width of the annular light spot is 0.2-0.4 mm.
The invention also provides a laser cleaning method, wherein the laser beam generated by the laser is combined to clean a pollution layer, and the pollution layer can be paint or an oxidation layer.
Throughout the description and claims of this application, the words "comprise/comprises" and the words "have/includes" and variations of these are used to specify the presence of stated features, values, steps or components but do not preclude the presence or addition of one or more other features, values, steps, components or groups thereof.
Some features of the invention, which are, for clarity, described in the context of separate embodiments, may also be provided in combination in a single embodiment. Conversely, certain features of the invention, which are, for brevity, described in the context of a single embodiment, may also be provided separately or in any suitable combination in different embodiments.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A method for generating a combined laser beam, comprising:
generating a ring-shaped laser beam by a first laser generator;
generating a Gaussian laser beam by a second laser generator, wherein the outer ring energy intensity of the Gaussian laser beam is less than the average energy intensity of the annular laser beam and the central energy intensity of the Gaussian laser beam is greater than the average energy intensity of the annular laser beam;
and combining the annular laser beam and the Gaussian laser beam into combined laser through a laser beam combiner, wherein the annular laser beam surrounds the Gaussian laser beam.
2. The method for generating the combined laser beam according to claim 1, wherein the average power density of the ring-shaped laser beam is ρ 1, the average power density of the Gaussian laser beam is ρ 2, and ρ 1 is ≧ ρ 2.
3. The method for generating a combined beam of laser light according to claim 1, further comprising a step of focusing the combined beam of laser light, wherein the radiation surface on which the combined beam of laser light is focused comprises a circular spot and an annular spot surrounding the circular spot, and a gap between the annular spot and the circular spot is 0-0.4 mm.
4. The method for generating a combined beam of laser light according to claim 3, wherein the inner diameter of the annular light spot is 0.4-0.8mm, the diameter of the circular light spot is 0.2-0.4mm, and the annular width of the annular light spot is 0.2-0.4 mm.
5. A laser cleaning method, characterized in that a contaminated layer is cleaned by a combined beam laser generated by the method for generating a combined beam laser according to any one of claims 1 to 4.
6. A laser, comprising a first laser generator, a second laser generator and a laser beam combiner, wherein the first laser generator is used for generating a ring laser beam, the second laser generator is used for generating a Gaussian laser beam, the laser beam combiner is used for combining the ring laser beam and the Gaussian laser beam into a combined laser, and the ring laser beam surrounds the Gaussian laser beam, and the outer ring energy intensity of the Gaussian laser beam is smaller than the average energy intensity of the ring laser beam and the central energy intensity of the Gaussian laser beam is larger than the average energy intensity of the ring laser beam.
7. The laser as claimed in claim 6, wherein the average power density of the ring laser beam is ρ 1, the average power density of the Gaussian laser beam is ρ 2, and ρ 1 ≧ ρ 2.
8. The laser device according to claim 6, further comprising a focusing device for focusing the combined laser, wherein the radiation surface of the combined laser after focusing comprises a circular spot and an annular spot surrounding the circular spot, and the gap between the annular spot and the circular spot is 0-0.4 mm.
9. The laser of claim 8, wherein the annular spot has an inner diameter of 0.4-0.8mm, the circular spot has a diameter of 0.2-0.4mm, and the annular spot has an annular width of 0.2-0.4 mm.
10. A laser cleaning method for cleaning a contamination layer, which may be paint, an oxide layer and other contaminants, by the combined beam laser generated by the laser according to any one of claims 6 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010292082.7A CN111451218A (en) | 2020-04-14 | 2020-04-14 | Method for generating combined laser, laser and laser cleaning method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010292082.7A CN111451218A (en) | 2020-04-14 | 2020-04-14 | Method for generating combined laser, laser and laser cleaning method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111451218A true CN111451218A (en) | 2020-07-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010292082.7A Pending CN111451218A (en) | 2020-04-14 | 2020-04-14 | Method for generating combined laser, laser and laser cleaning method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111451218A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113381270A (en) * | 2021-04-21 | 2021-09-10 | 深圳市瑞沃德生命科技有限公司 | Laser and have its laser physiotherapy device |
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| US20120255933A1 (en) * | 2008-10-17 | 2012-10-11 | Mckay Ryan P | High power laser pipeline tool and methods of use |
| CN104858547A (en) * | 2015-04-17 | 2015-08-26 | 温州职业技术学院 | Laser processing head based on double-beam spatial characteristic adjustment |
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| CN107052596A (en) * | 2017-06-12 | 2017-08-18 | 中南大学 | Metal or alloy product capillary processing method |
| CN206811328U (en) * | 2017-06-12 | 2017-12-29 | 中南大学 | Metal or alloy product microcellular processing systems |
| CN107824959A (en) * | 2017-11-13 | 2018-03-23 | 华中科技大学 | A kind of laser boring method and system |
| CN207199997U (en) * | 2017-06-06 | 2018-04-06 | 合肥辰辉防务技术有限公司 | A kind of laser closes beam system |
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2020
- 2020-04-14 CN CN202010292082.7A patent/CN111451218A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120255933A1 (en) * | 2008-10-17 | 2012-10-11 | Mckay Ryan P | High power laser pipeline tool and methods of use |
| CN104858547A (en) * | 2015-04-17 | 2015-08-26 | 温州职业技术学院 | Laser processing head based on double-beam spatial characteristic adjustment |
| CN105772446A (en) * | 2016-05-09 | 2016-07-20 | 武汉锐科光纤激光技术股份有限公司 | Cleaning device suitable for raw material of standard component and method of cleaning device |
| CN207199997U (en) * | 2017-06-06 | 2018-04-06 | 合肥辰辉防务技术有限公司 | A kind of laser closes beam system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113381270A (en) * | 2021-04-21 | 2021-09-10 | 深圳市瑞沃德生命科技有限公司 | Laser and have its laser physiotherapy device |
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