Grating formation in diazo salt (sensitized) gelatin

Diazo (sensitized) gelatins, which are characterized by a long shelf life, have been studied experimentally in order to evaluate their suitability for holographic recording. An argon-ion laser with total intensity near 8.1 mW/sq cm at 488.0 nm was used to expose the 39 gratings on two separate plates. The interbeam ratio of light intensities (K-value) was 1.05. A peak efficiency of 67.5% is observed near an exposure of 625 mJ/sq cm. No exposure dependence of grating formation is noted.