Analysis of Spectral Resolution of a Portable Cross Czerny-Turner Spectrometer

Abstract

The cross-type Czerny-Turner optical structure has been widely used in the portable fiber spectrometers.We investigated the relationship between the spectral resolution and the spatial parameters of the cross Czerny-Turner optical structure. The incident angle of the collimating mirror and that of the imaging mirror are the most important factors which affect the spectral resolution. The distances between optical elements have a little influence on the spectral resolution, which can be mostly compensated by adjusting the position of the CCD sensor. A experimental setup was built and the experimental results show good agreement with the simulation.