光谱成像光学系统的初步实验研究

A Preliminary Experimental Study of the Spectral Imaging Optical System

选用普通照相机镜头、液晶可调谐滤光片(Liquid Crystal Tunable Filter,LCTF,简称为液晶光阀)和普通黑白CCD,将LCTF置于镜头和CCD之间构成光谱成像光学系统,成像系统在440～720nm谱段以20nm为间隔改变通光波长进行测试,研究光谱成像光学系统的成像特点.获得一组光谱图像,图像质量较高.此系统不仅可以满足光谱成像的要求,更具有轻量、波长选择灵活,调谐速度快的优点.

We have made a study of the characteristics of the spectral imaging optical system. A common camera lens, liquid crystal tunable filter （ LCTF ） and an ordinary black - white CCD were selected. LCTF was placed between the lens and CCD. The result was a spectral im- aging optical system. The imaging system was tested within the 440 - 720 nm and the wave length was changed at 20 nm intervals. The outcome was a series of high - quality spectral images. The system can not only meet the requirements of spectral imaging but also boasts light weight, flexibility of wave length selection and fast tuning speed.