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Proceedings Paper

Photochromic point-diffraction interferometer for optical testing
Author(s): Martino Quintavalla; Giorgio Pariani; Giuseppe Crimi; Andrea Bianco; Chiara Bertarelli
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Paper Abstract

The principles for the realization of rewritable point-diffraction interferometers (PDIs) based on photochromic polyurethane films are described. Pinholes of variable sizes (diameter from 4 to 40 μm) have been optically written onto photochromic substrates converting locally the material from the colored to the uncolored form. The PDIs have been mounted in an interferometric setup and different reflective optics have been tested. By a controlled bleaching of the semi-transparent area around the pinhole, an optimal visibility in the interferograms is reached. Under this conditions several tests of reliability of the interferometer have been carried out.

Paper Details

Date Published: 13 September 2012
PDF: 7 pages
Proc. SPIE 8450, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation II, 84500Y (13 September 2012); doi: 10.1117/12.926096
Show Author Affiliations
Martino Quintavalla, INAF - Osservatorio Astronomico di Brera (Italy)
Giorgio Pariani, INAF - Osservatorio Astronomico di Brera (Italy)
Politecnico di Milano (Italy)
Giuseppe Crimi, INAF - Osservatorio Astronomico di Brera (Italy)
Andrea Bianco, INAF - Osservatorio Astronomico di Brera (Italy)
Chiara Bertarelli, Politecnico di Milano (Italy)


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)

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