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Proceedings Paper

Photochromic polymers for erasable focal plane masks and rewritable volume-phase holographic gratings
Author(s): Emilio Molinari; Giuseppe Zerbi; Fabio Bortoletto; Chiara Bertarelli; Andrea G. Bianco; Paolo Conconi; Maria Carla Gallazzi; Ruben Mazzoleni; Claudio Pernechele; Filippo Maria Zerbi; Enrico Giro
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Paper Abstract

Thermally irreversible photochromic materials, mainly belonging to the diarylethene class, are potentially useful as optoelectronic devices. Poly-1,2-bis-(2-methyl thiophen-3-yl)perfluorocyclopentene has been studied in order to verify its possible application in astronomy for the production of re-writable focal plane masks and volume phase holographic gratings. Films of photochromic materials embedded in an amorphous polymer matrix are obtained by casting from chloroform solution. The films show a good transparency in the visible region when the photochromic molecule is in the open-ring form, while they totally absorb visible wavelength radiations when the photochrome is in the other isomeric form. The variation in refractive index between the two photochromic isomers, evaluated by UV-vis-NIR absorption spectra, is large enough to make this photochromic apt for the production of volume phase holographic gratings.

Paper Details

Date Published: 30 January 2002
PDF: 9 pages
Proc. SPIE 4485, Optical Spectroscopic Techniques, Remote Sensing, and Instrumentation for Atmospheric and Space Research IV, (30 January 2002); doi: 10.1117/12.454283
Show Author Affiliations
Emilio Molinari, Osservatorio Astronomico di Brera (Italy)
Giuseppe Zerbi, Politecnico di Milano (Italy)
Fabio Bortoletto, Osservatorio Astronomico di Padova (Italy)
Chiara Bertarelli, Politecnico di Milano (Italy)
Andrea G. Bianco, Osservatorio Astronomico di Brera (Italy)
Paolo Conconi, Osservatorio Astronomico di Brera (Italy)
Maria Carla Gallazzi, Politecnico di Milano (Italy)
Ruben Mazzoleni, Osservatorio Astronomico di Brera (Italy)
Claudio Pernechele, Osservatorio Astronomico di Padova (Italy)
Filippo Maria Zerbi, Osservatorio Astronomico di Brera (Italy)
Enrico Giro, Osservatorio Astronomico di Padova (Italy)

Published in SPIE Proceedings Vol. 4485:
Optical Spectroscopic Techniques, Remote Sensing, and Instrumentation for Atmospheric and Space Research IV
Allen M. Larar; Martin G. Mlynczak, Editor(s)

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