Double-pass grating imaging spectrometer

• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2019,（1）
• 页码范围: 39-42
• 页数: 4页
• 语种: 英文
• DOI: 10.3788/COL201917.011202

摘要

A double-pass grating imaging spectrometer is proposed and demonstrated.The traditional entrance slit is replaced by a middle reflective slit,which is used as a spectral filter rather than a spatial filter.The light from the scene passes through the same dispersive grating twice.The full image of the scene can be obtained with a snapshot.Therefore,the stripe noise and image distortion caused by image mosaicking can be eliminated.Besides,the target is easier to be captured and focused,just like using a camera.This method can be used to obtain clearer spectral images of the scene conveniently and quickly.