Photochromic point-diffraction interferometer for optical testing

Martino Quintavalla; Giorgio Pariani; Giuseppe Crimi; Andrea Bianco; Chiara Bertarelli

doi:10.1117/12.926096

13 September 2012 Photochromic point-diffraction interferometer for optical testing

Martino Quintavalla, Giorgio Pariani, Giuseppe Crimi, Andrea Bianco, Chiara Bertarelli

Proceedings Volume 8450, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation II; 84500Y (2012) https://doi.org/10.1117/12.926096
Event: SPIE Astronomical Telescopes + Instrumentation, 2012, Amsterdam, Netherlands

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.

Citation Download Citation

Martino Quintavalla, Giorgio Pariani, Giuseppe Crimi, Andrea Bianco, and Chiara Bertarelli "Photochromic point-diffraction interferometer for optical testing", Proc. SPIE 8450, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation II, 84500Y (13 September 2012); https://doi.org/10.1117/12.926096

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