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Method of regulating and controlling light absorption property of metal surface by picosecond pulse laser

A metal surface and picosecond pulse technology, which is applied in the field of regulating the light absorption performance of metal surfaces, can solve the problems of effective regulation, strict environmental requirements, and low processing efficiency, and achieve the effects of good processing adaptability, simple process, and easy maintenance

Active Publication Date: 2014-03-12
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problems at present are: the high cost of the femtosecond laser system, strict environmental requirements, difficult use and maintenance, low processing efficiency, and difficulty in large-area processing; although the nanosecond laser system is low in cost and high in efficiency, its formation of micro-nano The ability of dual-scale structures, especially nanostructures, is limited, and it is difficult to effectively control the light absorption properties of metal surfaces
However, this type of laser is currently mainly limited to the fields of drilling, cutting and other removal processes, and its potential has not yet been fully understood in the field of surface micro-nano structures, especially the manufacture and application of surface micro-nano optical functional structures.

Method used

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  • Method of regulating and controlling light absorption property of metal surface by picosecond pulse laser
  • Method of regulating and controlling light absorption property of metal surface by picosecond pulse laser
  • Method of regulating and controlling light absorption property of metal surface by picosecond pulse laser

Examples

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Embodiment 1

[0061] Example 1, picosecond pulse laser regulation of copper surface light absorption performance

[0062] Copper is an excellent functional material, especially has good electrical and thermal conductivity, and has broad application prospects in the fields of solar photoelectric conversion, solar photothermal conversion, sensors, etc. In this embodiment, the copper surface is treated, including the following steps:

[0063] First, remove the oxide layer on the copper surface by mechanical grinding, then polish it with sandpaper and polishing cloth, and finally clean the copper surface with alcohol.

[0064] The central wavelength of the picosecond pulsed laser selected in this embodiment is 1064 nm, and the pulse width is 10 picoseconds. The laser beam is deflected by the galvanometer, and the deflection trajectory and deflection speed are controlled by the computer, and then focused on a rectangular metal copper surface with a thickness of 3mm through a scene with a focal l...

Embodiment 2

[0073] Example 2. Picosecond pulsed laser regulating the light absorption performance of aluminum surface

[0074] Aluminum is an excellent light metal material, which is widely used in aerospace, construction, automobile and other fields. In this embodiment, the aluminum surface is treated, including the following steps:

[0075] Use grinding to remove the oxide layer on the aluminum surface and make the surface to a certain degree of smoothness, then clean the aluminum surface with alcohol.

[0076] The central wavelength of the picosecond pulsed laser selected in this embodiment is 1064 nm, and the pulse width is 10 picoseconds. The laser beam is deflected by the galvanometer, and the deflection trajectory and deflection speed are controlled by the computer, and then focused on a rectangular aluminum surface with a thickness of 2mm through a scene with a focal length of 100mm, and the diameter of the focal spot is 30μm. During the laser beam deflection process, the laser ...

Embodiment 3

[0079] Example 3. Picosecond pulsed laser regulating the light absorption performance of titanium surface

[0080] Titanium is an excellent light metal functional material, which is widely used in aerospace and national defense. In this embodiment, the titanium surface is treated, including the following steps:

[0081] The oxide layer on the titanium surface is removed by grinding, and the surface reaches a certain level of smoothness, and then the titanium surface is cleaned with alcohol.

[0082]The central wavelength of the picosecond pulsed laser selected in this embodiment is 1064 nm, and the pulse width is 10 picoseconds. The laser beam is deflected by the galvanometer, and the deflection trajectory and deflection speed are controlled by the computer, and then focused on a rectangular titanium surface with a thickness of 2mm through a scene with a focal length of 100mm, and the diameter of the focal spot is 30μm. During the laser beam deflection process, the laser irr...

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Abstract

The invention discloses a method of regulating and controlling light absorption property of a metal surface by picosecond pulse laser. The method comprises the following steps: irradiating the metal surface by picosecond pulse laser; carrying out laser ablation for removal and self-assembly of the metal surface induced by picosecond pulse laser to obtain a micro-nano dual-scale structure on the metal surface thus realizing regulation and control of the light absorption property of the metal surface. The method disclosed by the invention fully exerts a picosecond laser preparation rule or the micron structure in random distribution as well as capacity of forming the self-assembled nanostructure, and is agile and controllable in processing process, low in processing cost and high in efficiency, so that the method is an economical and practical method of regulating and controlling the light absorption property of the metal surface.

Description

technical field [0001] The invention relates to a method for regulating the light-absorbing performance of a metal surface, in particular to a method for regulating the light-absorbing performance of a metal surface with a picosecond pulse laser. Background technique [0002] Metal surfaces generally have high reflectivity for visible and infrared light. Specific treatment is carried out on the metal surface, so that the reflectivity in the full spectrum or a specific spectral range is significantly reduced to achieve the effect of efficient broad-spectrum absorption or selective absorption. This efficient absorption surface is used in photonics, plasma photonics, optoelectronics, etc. It has potential application value in many fields such as science, metamaterials, stealth technology, thermal radiation source, radiation heat transfer equipment, solar absorber, thermophotovoltaic device, infrared sensor, biological device, and airborne / spaceborne equipment. It has attracted...

Claims

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Application Information

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IPC IPC(8): C21D10/00
Inventor 钟敏霖范培迅张红军龙江游
Owner TSINGHUA UNIV
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