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Flattened Gaussian beam picopulse laser processing system

A Gaussian beam and picosecond pulse technology, which is applied in laser welding equipment, metal processing equipment, manufacturing tools, etc., can solve the problems of wide-range flat-top processing, achieve wide-range flat-top Gauss beam processing, and improve flat-top processing. The effect of processing range

Inactive Publication Date: 2012-03-21
ACAD OF OPTO ELECTRONICS CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that wide-range flat-top processing cannot be performed during picosecond pulse Gaussian beam processing, and to provide a multi-wavelength mixed picosecond pulse width laser processing system that can realize accurate flat-top processing

Method used

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  • Flattened Gaussian beam picopulse laser processing system
  • Flattened Gaussian beam picopulse laser processing system
  • Flattened Gaussian beam picopulse laser processing system

Examples

Experimental program
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Embodiment 1

[0026] refer to figure 1 , make a picosecond pulse laser processing device of the present invention, a picosecond laser light source produced by Guoke Laser Company is used in the device, and the emitted laser light passes through the frequency doubling device 2 to form a laser composed of two wavelengths mixed . After the laser beam is reflected by the first and second mirrors in the mirror group 3 , the laser beam is deflected and enters the aspheric shaping lens group 4 . The mirror group 3 can be adjusted to ensure that the light beam passes through the center of the aspheric shaping lens group 4 accurately. The aspherical shaping lens group 4 is composed of 3 lenses, including two lenses with aspheric surfaces and a conventional lens. The aspheric lens group 4, the lens group and the focusing mirror in the beam expander system 5 need to eliminate aberrations together to ensure processing accuracy. The beam expander system 5 is composed of a concave lens and a convex le...

Embodiment 2

[0028] refer to figure 1 , make a picosecond pulse laser processing device of the present invention, use a picosecond laser light source produced by Coherent Company in this device, and the laser light emitted is irradiated on the reflector group 2 . The mirror group 2 is composed of three mirrors, and the laser light deflected by the mirror group 2 enters the aspheric shaping lens group 3 . The mirror group 2 is integrated in a fixed mechanical structure, and ensures that the light beam passes through the center of the aspheric shaping lens group 3 precisely. The aspherical shaping lens group 3 is composed of two lenses with aspheric surfaces. The beam expander system 4 is a fixed lens barrel composed of a concave lens and a convex lens, or only consists of a concave lens, which is used to expand the spot diameter of the picosecond laser and send it into the reflector 5 . The reflector 5 and the focusing mirror 6 are fixed in proper positions to focus the picosecond laser w...

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Abstract

The invention relates to a system for carrying out picopulse laser processing by mixed wavelength and flattened Gaussian beams, which consists of a picosecond laser light source, a frequency doubling device, a reflexibie reflecting mirror group, a non-spherical surface shaping lens group, a beam expanding system, a reflecting mirror, a focusing mirror and a control device, wherein the non-spherical surface shaping lens group is used for shaping ordinary Gaussian beams into flattened Gaussian beams, and the movement of the reflecting mirror can be controlled. The laser processing system can effectively realize the flattened Gaussian beam processing under the condition of picosecond laser, and the flattening processing is carried out on the workpiece surface. In addition, the precise control technology is adopted, the flattened processing range can be effectively improved, and the wide-range flattening processing is realized.

Description

technical field [0001] The invention relates to a laser processing system, in particular to a three-wavelength mixing laser processing system capable of shaping a picosecond pulse Gaussian beam into a picosecond pulse flat-top Gaussian beam, and belongs to the technical field of laser precision processing and manufacturing. Background technique [0002] Picosecond pulsed laser is also called as the process of heat deposition into the material faster than the process of heat diffusion to the periphery of the processing area, which can effectively avoid the obvious thermal effect caused by continuous laser and wide pulse width pulse laser in processing. For laser cold processing, the cold processing of picosecond pulse laser relies on the stress destruction of the processed material to achieve processing, which is essentially different from the thermal processing of continuous laser and wide pulse width pulse laser melting material. [0003] Compared with the ordinary Gaussian...

Claims

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Application Information

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IPC IPC(8): B23K26/04B23K26/073B23K26/046
Inventor 赵天卓余锦樊仲维刘洋张雪麻云凤闫莹
Owner ACAD OF OPTO ELECTRONICS CHINESE ACAD OF SCI