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Proceedings Paper

Optical testing of aspheres based on photochromic computer-generated holograms
Author(s): Giorgio Pariani; Andrea Bianco; Chiara Bertarelli; Paolo Spanó; Emilio Molinari
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Paper 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.

Paper Details

Date Published: 19 July 2010
PDF: 7 pages
Proc. SPIE 7739, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation, 77390V (19 July 2010); doi: 10.1117/12.857229
Show Author Affiliations
Giorgio Pariani, Politecnico di Milano (Italy)
Osservatorio Astronomico di Brera (Italy)
Andrea Bianco, Osservatorio Astronomico di Brera (Italy)
Chiara Bertarelli, Politecnico di Milano (Italy)
Ctr. for Nano Science and Technology (Italy)
Paolo Spanó, Osservatorio Astronomico di Brera (Italy)
Emilio Molinari, Osservatorio Astronomico di Brera (Italy)

Published in SPIE Proceedings Vol. 7739:
Modern Technologies in Space- and Ground-based Telescopes and Instrumentation
Eli Atad-Ettedgui; Dietrich Lemke, Editor(s)

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