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Programmable CGH on photochromic plates coded with DMD generated masks

Journal
Date Issued
2017
Author(s)
Alata, R.
•
•
Zamkotsian, F.
•
Lanzoni, P.
•
•
Bertarelli, C.
DOI
Abstract
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.
Volume
25
Issue
6
Start page
6945
Uri
Url
Issn Identifier
1094-4087
Ads BibCode
2017OExpr..25.6945A
Rights
open.access
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