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Proceedings Paper

Holographic recordings with high beam ratios on improved Bayfol® HX photopolymer
Author(s): Horst Berneth; Friedrich-Karl Bruder; Thomas Fäcke; Rainer Hagen; Dennis Hönel; Thomas Rölle; Günther Walze; Marc-Stephan Weiser
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Paper Abstract

Bayfol® HX film is a new class of recording materials for volume holography. It was commercialized in 2010 and is offering the advantages for full-color recording and moisture resistance without any chemical or thermal processing, combined with low shrinkage and detuning. These photopolymers are based on the two-chemistry concept in which the writing chemistry is dissolved in a preformed polymeric network. This network provides the necessary mechanical stability to the material prior to recording. In addition to the well-known security and imaging applications, Bayfol® HX film also offers a new opportunity for the manufacturing of volume Holographic Optical Elements (vHOEs) in new optical and optoelectronic applications. For the implementation of holographic recording layouts and associated exposure schedules for these HOEs detailed understanding of the photopolymer material properties and the knowledge how to achieve the optical requirements of dedicated holographic applications are necessary. In this paper we extend the application of our simulation method for the writing mechanism for the Bayfol® HX photopolymer film. Different photopolymer product variations, including development of photopolymer grades with improved bleaching properties and increased dynamical range, which enable simultaneous multi-color recording, while maintaining a high diffraction efficiency of the recorded holograms are covered. The model is investigated experimentally by recording and evaluation of specifically designed directional diffuser vHOEs as they would be used e.g. for light shaping or light management purposes. One important observation is the capability of Bayfol® HX film type photopolymers to form highly efficient diffraction gratings even at very high intensity ratios of the reference beam versus the object beam.

Paper Details

Date Published: 8 May 2013
PDF: 12 pages
Proc. SPIE 8776, Holography: Advances and Modern Trends III, 877603 (8 May 2013); doi: 10.1117/12.2018618
Show Author Affiliations
Horst Berneth, Bayer MaterialScience AG (Germany)
Friedrich-Karl Bruder, Bayer MaterialScience AG (Germany)
Thomas Fäcke, Bayer MaterialScience AG (Germany)
Rainer Hagen, Bayer MaterialScience AG (Germany)
Dennis Hönel, Bayer MaterialScience AG (Germany)
Thomas Rölle, Bayer MaterialScience AG (Germany)
Günther Walze, Bayer MaterialScience AG (Germany)
Marc-Stephan Weiser, Bayer MaterialScience AG (Germany)

Published in SPIE Proceedings Vol. 8776:
Holography: Advances and Modern Trends III
Miroslav Hrabovský; John T. Sheridan; Antonio Fimia-Gil, Editor(s)

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