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Proceedings Paper

Methods for influencing the optical properties of dichromated gelatin films
Author(s): Hartmut Schuette; Vera Dederichs; Christo G. Stojanoff
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Paper Abstract

In this paper we describe the spectral characteristics of transmission and reflection holograms in dichromated gelatin (DCG), and their dependence on process parameters. The aim of our research efforts was, to manufacture holograms with low absorption and scattering and well defined optical properties, as central wavelength, bandwidth, and refractive index modulation. Losses due to absorption and scattering can be minimized by employing inorganic hardeners. By means of process control it is possible to manufacture reflection grating holograms with bandwidths between 11 nm and well above 360 nm. It was found that the hardening time, exposure energy, dehydration temperature and initial layer thickness affect the bandwidth and central wavelength of reflection holograms strongly. The shift of the Bragg-angle of holographic transmission gratings depends on the pH- value of the swelling bath and was found to be lowest at pH 9.

Paper Details

Date Published: 7 September 1994
PDF: 12 pages
Proc. SPIE 2262, Optical Thin Films IV: New Developments, (7 September 1994); doi: 10.1117/12.185800
Show Author Affiliations
Hartmut Schuette, Technical Univ. Aachen (Germany)
Vera Dederichs, Technical Univ. Aachen (Germany)
Christo G. Stojanoff, Technical Univ. Aachen (Germany)

Published in SPIE Proceedings Vol. 2262:
Optical Thin Films IV: New Developments
James D. Rancourt, Editor(s)

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