Photopolymer based VPHGs: from materials to sky results

A. Zanutta; E. Orselli; T. Fäcke; A. Bianco

doi:10.1117/12.2230893

22 July 2016 Photopolymer based VPHGs: from materials to sky results

A. Zanutta, E. Orselli, T. Fäcke, A. Bianco

Proceedings Volume 9912, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II; 99123B (2016) https://doi.org/10.1117/12.2230893
Event: SPIE Astronomical Telescopes + Instrumentation, 2016, Edinburgh, United Kingdom

Abstract

Volume Phase Holographic Gratings cover a relevant position as transmission dispersing elements in astronomical spectrographs and each astronomical observation could take advantage of specific dispersive elements with features tailored for achieving the best performances. The design and manufacturing of high efficiency and reliable VPHGs require photosensitive materials where it is possible to control both the refractive index modulation and the film thickness. By means of Bayfol® HX photopolymers, we designed and manufactured six VPHGs for astronomical instrumentation in a GRISM configuration. We demonstrated how photopolymers are reliable holographic materials for making astronomical VPHGs with performances comparable to those provided by VPHGs based on Dichromated Gelatins (DCGs), but with a much simpler production process.

Citation Download Citation

A. Zanutta, E. Orselli, T. Fäcke, and A. Bianco "Photopolymer based VPHGs: from materials to sky results", Proc. SPIE 9912, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II, 99123B (22 July 2016); https://doi.org/10.1117/12.2230893

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