微型光谱仪光学结构研究

Optical structure of miniature spectrometer

光谱仪是光谱学和光谱技术中最基本的分析仪器之一,仪器的小型化对于扩展仪器使用范围有很大的帮助。设计一种微型可见光CCD摄像光谱仪的光学结构,通过理论计算,选用合适的光纤、平面定向光栅和凹面反射镜,并将它们合理组合,采用聚焦反射和分光的方法,将待测光进行色散,直接投射到CCD接收器件的表面。最后对设计的仪器性能进行了分析。结果表明:仪器的光学结构大大简化,整体尺寸减小,且精度有一定程度的提高。

The miniaturization of spectrometer is helpful to increase its application.An optical layout was designed for a miniature CCD spectrometer for visible light.The proper optical fiber,plane directional optical grating and concave reflector were chosen and integrated together based on the theoretical computation for the optical layout of the spectrometer.The entrance light was dispersed and directly projected onto the active area of a CCD by focusing reflection and beam splitting.The optical layout was greatly simplified and the size of the spectrometer was reduced.Compared with other products,it is more accurate.