Optical testing of aspheres based on photochromic computer-generated holograms

Giorgio Pariani; Andrea Bianco; Chiara Bertarelli; Paolo Spanó; Emilio Molinari

doi:10.1117/12.857229

19 July 2010 Optical testing of aspheres based on photochromic computer-generated holograms

Giorgio Pariani, Andrea Bianco, Chiara Bertarelli, Paolo Spanó, Emilio Molinari

Proceedings Volume 7739, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation; 77390V (2010) https://doi.org/10.1117/12.857229
Event: SPIE Astronomical Telescopes + Instrumentation, 2010, San Diego, California, United States

Abstract

Aspherical optics are widely used in modern optical telescopes and instrumentation because of their ability to reduce aberrations with a simple optical system. Testing their optical quality through null interferometry is not trivial as reference optics are not available. Computer-Generated Holograms (CGHs) are efficient devices that allow to generate a well-defined optical wavefront. We developed rewritable Computer Generated Holograms for the interferometric test of aspheres based on photochromic layers. These photochromic holograms are cost-effective and the method of production does not need any post exposure process.

Citation Download Citation

Giorgio Pariani, Andrea Bianco, Chiara Bertarelli, Paolo Spanó, and Emilio Molinari "Optical testing of aspheres based on photochromic computer-generated holograms", Proc. SPIE 7739, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation, 77390V (19 July 2010); https://doi.org/10.1117/12.857229

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