激光与光电子学进展, 2013, 50 (1): 013002, 网络出版: 2013-01-18
应用于LIBS的CCD光谱测量系统
CCD Spectrum Measurement System for Laser Induced Breakdown Spectroscopy
光谱学 激光诱导击穿光谱学 触发延迟时间 光积分时间 spectroscopy laser induced breakdown spectroscopy CCD CCD trigger delay time integration time
摘要
为了探测激光诱导击穿光谱（LIBS）的信号，设计了CCD同步光谱测量系统。该系统采用高灵敏度的Sony ILX554B 线阵CCD作为光谱探测器，运用一种新的驱动方法，可灵活控制CCD的触发延迟时间和光积分时间，从而最大限度地滤除LIBS背景辐射的干扰，得到最佳的原子辐射信号，提高LIBS检测的灵敏度。通过测量各种样品的LIBS信号在不同延迟时间和积分时间时的谱线图，证实其在LIBS宽谱、快速测量中的有效性，为开发低成本LIBS测量仪提供了技术依据。
Abstract
A CCD pulsed signal acquisition system for the spectral measurements in laser-induced breakdown spectroscopy (LIBS) is designed. We adopt a highly sensitive Sony ILX554B linear CCD as detector, and exploit a novel CCD driving method that can freely adjust the delay time relative to the laser pulse and the integration time of the photosensitive units in the CCD. By optimizing the delay time and the integration time, it can reduce the interference of the background emissions significantly and improve the sensitivity of LIBS. The LIBS signals of several kinds of samples under different delay times and integration time are measured, and it is shown that the system has a good performance in rapid analysis of LIBS, providing technical support to develop an inexpensive LIBS instrument.
冯为蕾, 王福娟, 曾万祺, 黄国樑, 王自鑫, 周建英, 蔡志岗. 应用于LIBS的CCD光谱测量系统[J]. 激光与光电子学进展, 2013, 50(1): 013002. Feng Weilei, Wang Fujuan, Zeng Wanqi, Huang Guoliang, Wang Zixin, Zhou Jianying, Cai Zhigang. CCD Spectrum Measurement System for Laser Induced Breakdown Spectroscopy[J]. Laser & Optoelectronics Progress, 2013, 50(1): 013002.
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