【摘要】 文中介绍激光热透镜效应及其在痕量分析中应用的国内外近况,并建立了利用单光束法,以检测激光束远场中心光强相对变化为测量手段的系统。本测量系统由传感器、峰值保持器、A/D及微机等构成,可用于测量液态样品中物质的极弱光吸收。更多还原

【Abstract】 The paper illustrates the principle of laser induced thermal lens effects and the current technical situation of the trace analysis by means of laser induced thermal lens effect at home and abroad, and introduces our measurmental system which is set up based on method of single beam. The system consistes of single sensor, peak-keeping-up device and computer, it has been used on measuring optical absorption of samples.更多还原