Abstract

The results are described of experiments carried out to develop improved processing methods for reflection holograms in bleached silver halide emulsions, as a result of which overall efficiencies of nearly 66% (75% after allowing for specular reflections) have been achieved for gratings recorded by two plane waves at 514.5 nm in an index-matching tank. These figures are limited almost solely by scatter and may approach the limits obtainable with the recording material, Agfa 8E56HD. Close agreement has been reached between experimental measurements of the off-Bragg response of the gratings and theoretical predictions based on coupled-wave analyses, allowing determination of the principal grating parameters and revealing maximum efficiency to correspond to a permittivity modulation of ~8.7%.

© 1984 Optical Society of America

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