Green sensitive photopolymers have been studied to produce volume phase gratings (VPHGs) to be used as dispersing elements in astronomical instrumentations. They have been characterized determining the parameters that affect the diffraction efficiency (thickness, refractive index modulation, exposure, line density, etc.). Different prototypes have been produced varying all the selected parameters. The optical proprieties of the devices were investigated to understand the quality of the gratings. The results were encouraging, therefore, to experience the possibility to produce a VPHG for astronomical applications, low dispersion prototype has been designed, and it will be mounted in the AFOSC camera (Asiago, Italy).

Date Published: 13 September 2012
PDF: 13 pages
Proc. SPIE 8450, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation II, 845041 (13 September 2012); doi: 10.1117/12.926165

Published in SPIE Proceedings Vol. 8450:
Modern Technologies in Space- and Ground-based Telescopes and Instrumentation II
Ramón Navarro; Colin R. Cunningham; Eric Prieto, Editor(s)