Shock wave imaging system and method for laser ablation target material

A technology of laser ablation and imaging system, which is applied in the parts of TV system, image communication, color TV, etc. It can solve the problems of complex structure of shock wave imaging device, low imaging resolution, limitation of sputtering detail observation, etc. , to achieve the effect of simple structure, high image resolution and simple implementation

Inactive Publication Date: 2021-08-20
PLA PEOPLES LIBERATION ARMY OF CHINA STRATEGIC SUPPORT FORCE AEROSPACE ENG UNIV
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  • Application Information

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Problems solved by technology

The structure of the shock wave imaging device for laser ablation targets in the above documents is relatively complex and the imaging resolution is low. The image acquisition speed needs to be further improved, and the observation of shock waves and sputtering details of laser ablation targets is limited to a certain extent.

Method used

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  • Shock wave imaging system and method for laser ablation target material
  • Shock wave imaging system and method for laser ablation target material

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Embodiment Construction

[0024] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0025] The color schlieren technology uses light as the measurement medium. When the light beam passes through the flow field area with density changes, it will be deflected. As a diagnostic technique, compared with the black and white schlieren method, the image obtained by the color schlieren technique has stronger imaging sensitivity and image resolution. The strong shock wave and material sputtering produced by laser ablation target will produce a large density gradient, so the shock wave and material sputtering produced by laser ablation target can be well observed by using the color schlieren method.

[0026] The invention provides a shock wave imaging system for laser ablation target based on color schlieren method. Realize the high-resolution imaging of the shock wave generated by the laser ablation target and the evolution process of...

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Abstract

The invention discloses a shock wave imaging system and method for a laser ablation target material based on a color schlieren technology. The system comprises a sub-millisecond laser, a reflector, a focusing lens, a PET film, an ablation target material, a photoelectric detector, a digital delay pulse generator, a flash source, a collimating mirror, a schlieren mirror, a color film knife edge, an imaging mirror, an optical filter, a high-speed camera and an image acquisition system. According to the shock wave imaging system and method for the laser ablation target material, the image resolution is high, the whole laser ablation process is observed more carefully, the system can shoot transient ablation states at different moments, continuous shooting under high-speed imaging can be achieved, the sensitivity of the system is remarkably improved, and the whole device is simple in structure, easy to implement, high in universality and easy to transform.

Description

technical field [0001] The invention belongs to the field of laser ablation, and relates to flow field schlieren display technology, in particular to a shock wave imaging system and method for laser ablation targets based on color schlieren technology. Background technique [0002] At present, there are few shock wave imaging devices for laser ablation targets disclosed at home and abroad. Schlieren imaging technology has attracted the most attention. In the new field of observation and measurable vision. At the end of the 20th century, Callies et al. used video photography and schlieren photography to study what happens in the gas around the sample when the excimer pulse laser (KrF laser, λ=248nm, full width at half maximum FWHM is 25ns) bombards the metal surface. gas dynamic process. This method can give a spatial image of the gas dynamic process at a certain moment (Callies G, Berger P, Hugel H. Time-resolved observation of gas-dynamic discontinuities arising during ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M9/06H04N5/225
CPCG01M9/067H04N23/00
Inventor 李兰叶继飞姚猛高贺岩王莹李赛王殿恺
Owner PLA PEOPLES LIBERATION ARMY OF CHINA STRATEGIC SUPPORT FORCE AEROSPACE ENG UNIV
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