【摘要】 本文介绍一种精确测定光学材料反射、透射谱的装置。采用快速旋转的导光纤维交替对入射光束及反射光束或透射光束采样,利用反馈控制使入射光束产生的光电流维持常数,避免被测信号之间进行除法的困难。在410.0～650.0nm的波段测量,相对精度小于2％自动绘制整个谱所需时间仅二分钟。更多还原

【Abstract】 An effective and precision apparatus for rapid determination of optical reflective and transmissive spectra is described. By using a rapid rotating optical fiber to sample the incident and reflected or transmitted light beams respectively and feedback of the incident beam intensity to monitor the gain of the photomultiplier for keeping the incident photo-current under constant level, the measured signal gives the transmissivity or reflectivity directly. Besides, due to rapid scanning of the sampled signals the requirement 04 the steadiness of the light source is not critical. The relative accuracy of the measurements in the range of 410nm to 650 nm is less than 2% and the time for scanning the complete visible spectrum is 2 minutes.更多还原