Performances of NIR VPHGs at cryogenic temperatures

M. Insausti; F. Garzón; J. L. Rasilla; P.-A. Blanche; P. Lemaire

doi:10.1117/12.788896

23 July 2008 Performances of NIR VPHGs at cryogenic temperatures

M. Insausti, F. Garzón, J. L. Rasilla, P.-A. Blanche, P. Lemaire

Proceedings Volume 7018, Advanced Optical and Mechanical Technologies in Telescopes and Instrumentation; 70184T (2008) https://doi.org/10.1117/12.788896
Event: SPIE Astronomical Telescopes + Instrumentation, 2008, Marseille, France

Abstract

We summarize the performances measured at room temperature and in cryogenic conditions of a set of NIR Volume Phase Holographic Gratings (VPHGs) which can then be used in astronomical instrumentations. VPHGs are novel optical components which can replace standard transmission gratings. Instead of a surface modulation a diffraction index modulation printed in a volume of material generates the diffraction according to the required specifications. Results on transmission and wavefront deformation are presented and compared in the two temperature regimes. These results were achieved along the run of the Joint Research Action 6 of OPTICON FP6 programme whose participating institutions are Osservatorio Astronomico di Brera (INAF), Instituto de Astrofísica de Canarias, Centre Spatial de Liege, Politecnico di Milano and European Southern Observatory.

Citation Download Citation

M. Insausti, F. Garzón, J. L. Rasilla, P.-A. Blanche, and P. Lemaire "Performances of NIR VPHGs at cryogenic temperatures", Proc. SPIE 7018, Advanced Optical and Mechanical Technologies in Telescopes and Instrumentation, 70184T (23 July 2008); https://doi.org/10.1117/12.788896

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