环境温度及干扰光对主动辐射测温系统测温精度影响的讨论

Effect on measurement accuracy of temperature in real-time measurement system by surrounding temperature and disturbing light

在介绍一种利用InGaAs/I半导体激光器实现的实时测温系统的基础上 ,着重讨论了环境温度及干扰光对该系统测温精度的影响。提出了克服环境温度及干扰光对测温精度影响的两条措施 :一是在调制盘与探测器之间置一窄带滤光片 ;另一是采用水冷遮蔽板并进行电气补偿 ,进行了一些必要的计算和分析 ,得到了一些有意义的结论。

After introducing the temperature real-time measurement system using laser diode InGaAs/I and LiTaO_3 pyroelectric detector,This paper mainly discusses the effect on measurement accuracy of temperature by surrounding temperature and disturbing light.Two pieces of measures are taken to overcome the effect on temperature measurement accuracy by surrounding temperature and disturbing light:One is placing a narrow-band filter between modulating disk and detector,the other is using water-cold shelter and taking electrical compensation.Some necessary analyses and discussion are given,and some reasonable conclusions are gained.