红外光学材料折射率温度系数测量装置

An Equipment for Measuring the Temperature Coefficient of Refractive Index of Infrared Materials

本文介绍一台红外光学材料折射率温度系数测量装置。该装置是由温控系统、精密测角系统、光学系统和电器控制系统等组成的一台高精度全自动化测量系统,采用改进的自准直法测量折射率温度系数值。该装置达到的主要技术指标:工作波长为2～12μm,温度范围为-50～150℃,测量不确定度为3%,可满足各种红外光学材料折射率温度系数测量的要求。利用该装置对红外材料锗折射率温度系数值进行了测量,并对测量数据进行了报道。

The automatic high-precision system, which is composed of temperature control system,precision goniometer system, optical system and electrical control system for measuring the temperature coefficient of refractive index of infrared materials is introduced in the paper. The temperature coefficient of refractive index is measured with the improved autocollimating method. The key index of the instrument is as follows: its wavelength range is 2～12μm,temperature range is -50～150℃,uncertainty is 3%. The instrument can meet the measurement requirement of temperature coefficient of refractive index of the different infrared materials. With this instrument, the temperature coefficient of germanium material has been measured and the results has been reported.