Study of the Composition and Spectral Characteristics of a HDG-Prism Disperse System (GRISM) by Refractive Index Phase Matching

TL;DR

This study investigates the composition and spectral properties of a GRISM made from a high diffraction grating (HDG) and a prism, demonstrating stable performance and spectral resolution of mercury lines.

Contribution

It introduces a novel GRISM constructed via refractive index matching with an HDG processed by halide vapor, highlighting its stability and spectral capabilities.

Findings

Stable under humidity and UV light

Achieved 2.1nm wavelength separation of mercury lines

Demonstrated effective refractive index phase matching

Abstract

The composition and characteristics of a GRISM gained by refractive index matching between a refractive index modulation type HDG and a prism is investigated, the HDG being built by processing silver halide emulsion with halide vapor. The GRISM has been stable under external influences like humidity or ultraviolet light exposure. The mercury atomic spectrum obtained by a GRISM based on a HDG with a spatial frequency of 600mm-1 shows yellow dual lines with the wavelength difference of 2.1nm sufficiently separated.