11 March 2015 Diffractive optics in large sizes: computer-generated holograms (CGH) based on Bayfol HX photopolymer
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Proceedings Volume 9385, Advances in Display Technologies V; 93850C (2015) https://doi.org/10.1117/12.2077139
Event: SPIE OPTO, 2015, San Francisco, California, United States
Abstract
Volume Holographic Optical Elements (vHOE) offer angular and spectral Bragg selectivity that can be tuned by film thickness and holographic recording conditions. With the option to integrate complex optical function in a very thin plastic layer formerly heavy refractive optics can be made thin and lightweight especially for large area applications like liquid crystal displays, projection screens or photovoltaic. Additionally their Bragg selectivity enables the integration of several completely separated optical functions in the same film. The new instant developing photopolymer film (Bayfol® HX) paves the way towards new cost effective diffractive large optics, due to its easy holographic recording and environmental stability.

A major bottleneck for large area applications has been the master hologram recording which traditionally needs expensive, large high precision optical equipment and high power laser with long coherence length. Further the recording setup needs to be rearranged for a change in optical design.

In this paper we describe an alternative method for large area holographic master recording, using standard optics and low power lasers in combination with an x, y-translation stage. In this setup small sub-holograms generated by a phase only spatial light modulator (SLM) are recorded next to each other to generate a large size vHOE. The setup is flexible to generate various types of HOEs without the need of a change in the mechanical and optical construction by convenient SLM programming. One Application example and parameter studies for printed vHOEs based on Bayfol® HX Photopolymer will be given.
© (2015) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Friedrich-Karl Bruder, Friedrich-Karl Bruder, Thomas Fäcke, Thomas Fäcke, Rainer Hagen, Rainer Hagen, Dennis Hönel, Dennis Hönel, Tim Patrick Kleinschmidt, Tim Patrick Kleinschmidt, Enrico Orselli, Enrico Orselli, Christian Rewitz, Christian Rewitz, Thomas Rölle, Thomas Rölle, Günther Walze, Günther Walze, } "Diffractive optics in large sizes: computer-generated holograms (CGH) based on Bayfol HX photopolymer", Proc. SPIE 9385, Advances in Display Technologies V, 93850C (11 March 2015); doi: 10.1117/12.2077139; https://doi.org/10.1117/12.2077139
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