Programmable CGH on photochromic plates coded with DMD generated masks

Computer Generated Holograms (CGHs) are used for wavefront shaping and complex optics testing. Present technology allows for recording binary CGHs. We propose a Digital Micro-mirror Device (DMD) as a reconfigurable mask, to record rewritable binary and grayscale CGHs on a photochromic plate. Opaque...

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Bibliographic Details
Published inOptics express Vol. 25; no. 6; pp. 6945 - 6953
Main Authors Alata, R, Pariani, G, Zamkotsian, F, Lanzoni, P, Bianco, A, Bertarelli, C
Format Journal Article
LanguageEnglish
Published United States Optical Society of America - OSA Publishing 20.03.2017
Subjects
Astrophysics
Sciences of the Universe
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Summary:Computer Generated Holograms (CGHs) are used for wavefront shaping and complex optics testing. Present technology allows for recording binary CGHs. We propose a Digital Micro-mirror Device (DMD) as a reconfigurable mask, to record rewritable binary and grayscale CGHs on a photochromic plate. Opaque at rest, this plate becomes transparent when it is illuminated with visible light of suitable wavelength. We have successfully recorded the very first amplitude grayscale CGH, with a contrast greater than 50, which was reconstructed with a high fidelity in shape, intensity, size and location. These results reveal the high potential of this method for generating programmable/rewritable grayscale CGHs, which combine DMDs and photochromic substrates.
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ISSN:1094-4087
1094-4087
DOI:10.1364/OE.25.006945