Photopolymer-based volume phase holographic grating for astronomical instrumentations

摘要

Green sensitive photopolymers have been studied to produce volume phase gratings (VPHGs) to be used as dispersingelements in astronomical instrumentations. They have been characterized determining the parameters that affect thediffraction efficiency (thickness, refractive index modulation, exposure, line density, etc.). Different prototypes havebeen produced varying all the selected parameters. The optical proprieties of the devices were investigated to understandthe quality of the gratings. The results were encouraging, therefore, to experience the possibility to produce a VPHG forastronomical applications, low dispersion prototype has been designed, and it will be mounted in the AFOSC camera(Asiago, Italy).© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.