微小型光栅光谱仪光学系统的特点与光谱分辨率的提高

微小型光谱仪的设计制作可以采用多种方法,其结构特点和光谱分辨率也各不相同,目前实用高光谱分辨率微小型光谱仪采用的是光栅色散型光学系统.简要回顾了微小型光谱仪的发展过程,分析了典型的光栅色散型微小型光谱仪采用的光学系统,如基于罗兰圆的光学系统,基于Czerny-Turner的光学系统的特点,总结了提高微小型光栅光谱仪光谱分辨率采用的方法和技术,特别是解决光谱仪的微小型化和光谱分辨率之间的矛盾以及测量光谱范围和光谱分辨率之间的矛盾的方法,从而为新型微小型光谱仪的研制提供经验和借鉴.

Characteristics of Typical Optical Systems with Diffractive Gratings of Micro-Spectrometers and Improvement of Spectrometer's Resolution

Many ways have been practiced in designing and fabricating micro spectrometer,each has its own characteristics distinguished by different spectral resolution and other performances.Micro spectrometers applied presently with high spectral resolution usually adopt optical systems with dispersive components being diffractive gratings.The development of micro spectrometer is reviewed briefly,and typical optical systems are analyzed and discussed,such as optical system based on Roland circle and that based on Czerny-Turner structure.The techniques and methods as well as the experiences of improving micro spectrometer's spectral resolution are summarized,especially the tradeoff between miniaturization and spectral resolution,and the balance between spectral range and spectral resolution are considered.This summary gives a outline of the optical systems' characteristic of dispersive micro-spectrometer,and it can be a reference for new micro spectrometer's designing.