空气中激光清洗过程的等离子体光谱分析  

Plasma Spectral Analysis of Laser Cleaning Process in Air

作　　者：佟艳群[1] 张永康[1] 姚红兵[1] 孟春梅[1] 管海兵[1] 

机构地区：[1]江苏大学机械工程学院,江苏镇江212013

出　　处：《光谱学与光谱分析》2011年第9期2542-2545,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金重点项目(50735001);国家自然科学基金项目(10804037);江苏省博士研究生创新基金项目(CX09B_190Z)资助

摘　　要：在空气环境下,激光诱导等离子体光谱用于激光清洗状态的在线分析快速而准确。该文利用中阶梯光栅光谱仪探测脉冲激光器作用于干净及表面污染的铜币样品产生的等离子体光谱谱线,这些谱线中不但包含了清晰的铜原子发射谱线,还包含空气中氧气和氮气与激光作用产生分解效应的原子谱线。为了消除单次测量的不确定性,分析了多次测量的分布恒定的氧原子和氮原子谱线的统计规律,表明强度分布规律一致,且相对标准差基本相同,可以采用单次测量的光谱图变化表示清洗过程中状态。表面污染的铜币光谱图中包含多元素原子谱线和连续谱线,清洗干净铜币的光谱图连续谱线消失且只有铜元素谱线,观察谱线变化就可以表明样品是否被清洗干净。It is quick and accurate to on-line monitor the sample condition of laser cleaning by means of laser-induced plasma spectrum in air. In the present article, the eehelle grating spectrometer was used to detect the plasma spectral lines induced by pulsed laser interaction with copper coin samples with or without contamination. The spectrogram showed that there were clear Cu I spectrum lines and air atom spectrum lines of N I and O I. In order to eliminate the uncertainty of single measurement, the statistical regularity of N I and 01 spectrum lines was analyzed. Their intensity distribution laws were consistent and their relative standard deviations were the same basically. So a single measurement spectrum could be used to monitor cleaning process. The spectra of copper samples with contamination consisted of many elements atomic spectral lines and continuous spec- tral lines. But there are Cu I spectral lines in the spectra of clean copper samples. As a result, the authors could detect the change of spectral lines to judge whether the laser cleaning samples were clean.

关 键 词：激光诱导等离子体 激光清洗 谱线分布 谱线强度 

分 类 号：O433.4[机械工程—光学工程]