反射率测量中的热辐射影响及其消除方法  

Effects and elimination method of the thermal radiation interference on the reflectivity measurement

作　　者：金云声[1] 谭福利[1] 张永强[1] 李牧[1] 赵剑衡[1] 

机构地区：[1]中国工程物理研究院流体物理研究所,四川绵阳621900

出　　处：《强激光与粒子束》2011年第7期1767-1770,共4页High Power Laser and Particle Beams

基　　金：中国科学院化学激光重点实验室开放基金项目(KLCL200906)

摘　　要：反射率测量过程中,被激光加热的材料发出热辐射光,对探测器测量存在明显干扰,给测量结果带来了较大误差,该现象普遍存在于以往的测试工作中。通过深入分析热辐射特性,在反射率测量装置中加入透过波长不同于加载激光波长的探测器,探测热辐射在该透过波长下的光强信号,并利用比对法消除了反射率测量过程中的热辐射干扰,使高温段的反射率测量精度得到较大提高。In the process of measuring the reflectivity,the thermal radiation,which is irradiated by laser and those temperature rise,brings obvious interference on the measurement,thus introducing a large error of the measurement.This phenomenon is common in the previous measurement work.The measurement accuracy on the reflectivity of the high temperature section can be greatly improved by the following procedure： a new detector whose transmitting wavelength is different from the loading laser＇s wavelength is added first,and then the light strength signal of the thermal radiation at the laser loading section and the temperature dropping section after the laser stops is detected,at last the comparison method is applied to eliminate the thermal radiation interference in the process of reflectivity measurement.

关 键 词：强激光 反射率 热辐射 积分球 

分 类 号：TN247[电子电信—物理电子学]