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Proceedings Paper

Effects of the film manufacturing procedure and development process on the holographic properties of HOE in DCG
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Paper Abstract

The objective of this research program was the development of a technology for the industrial manufacturing of high efficiency HOE (Holographic Optical Elements) with predetermined spectral characteristics and angular selectivity ranging in format from few square millimeters to square meters. The developed technology includes the machine fabrication of precision holographic films (2 to 30 micron thickness) on glass or plastic substrata, and chemically and thermally adapted hologram development processes. The desired optical properties of the holographic material for a specific technical application are determined during the making of the film and are modified during the exposure and the development of the HOE. This is achieved through the use of filler material to swell or shrink the hologram and a specific development process to fix the desired spectral properties of the film. The developed technology extends the applicability of dichromated gelatin ( DCG) into the blue and infrared spectral domains. The effects of the holographic layer deposition and of the development process on the holographic properties are illustrated with electron-microscope photographs of the cross section of the hologram. The photographs reveal the presence of the nano-size voids that are generated during the hologram processing. These voids are regarded as the cause for bandwidth enlargement of the HOE.

Paper Details

Date Published: 29 June 2004
PDF: 15 pages
Proc. SPIE 5290, Practical Holography XVIII: Materials and Applications, (29 June 2004); doi: 10.1117/12.526000
Show Author Affiliations
Christo G. Stojanoff, Holotec GmbH (Germany)
Aachen Univ. of Technology (Germany)

Published in SPIE Proceedings Vol. 5290:
Practical Holography XVIII: Materials and Applications
Tung H. Jeong; Hans I. Bjelkhagen, Editor(s)

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