System and method for detecting laser energy absorption law of metal

Abstract

The invention provides a system and a method for detecting a laser energy absorption law of metal. According to the system and the method, a low-power continuous laser is taken as a detecting light source in the light of a laser diffraction method of a Babinet principle, a high-speed CCD (charge coupled device) is taken as a diffraction fringe acquisition device, the change condition of diffraction fringes in the millisecond laser action process is detected, the acquired fringe pattern sequence is subjected to image processing, fringe spacing information is acquired, and millisecond laser absorption law information of a metal sample can be obtained through calculation by using a corresponding theoretical model. The millisecond laser absorption law information of a metal material is extracted, and the method is simple, effective and applicable to quantitative detection and analysis of the absorption law of the material under the condition of low-intensity laser and qualitative analysis of the ablation condition of the material under the condition of high-intensity laser.

Description

technical field [0001] The invention belongs to the technical field of photoelectric detection, and in particular relates to a detection system and method for detecting the law of laser energy absorption by a metal target when a millisecond laser acts on a filamentary metal target. Background technique [0002] The essence of laser heat treatment is to use the laser energy absorbed by the material to change the physical and chemical structure of the material so as to achieve a certain purpose of heat treatment. The absorption of laser light by materials has always been one of the most concerned topics in laser heat treatment, and it has a direct impact on the heat treatment quality of workpieces. It is of great significance for the research and application of laser heat treatment technology to understand and master the law of the absorption of laser energy by materials during the interaction between laser and materials. However, the current laser heat treatment materials ar...

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Problems solved by technology

The disadvantage of this method is that due to the heat conduction of the thermocouple wire, the measured temperature will greatly deviate from the true value, and the measured data needs to be corrected according to the actual situation. In addition, due to the long thermal response time of the thermocouple, the Materials do not measure dynamic absorption well

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