Chemical Sensitization of Fine-Grain Silver Halide Emulsions for Holographic Recording

Marga Pantcheva; Tsveta Petrova; Nina Pangelova; Anton Katsev

doi:10.1117/12.963804

12 April 1990 Chemical Sensitization of Fine-Grain Silver Halide Emulsions for Holographic Recording

Marga Pantcheva, Tsveta Petrova, Nina Pangelova, Anton Katsev

Proceedings Volume 1183, Holography '89; (1990) https://doi.org/10.1117/12.963804
Event: Holography '89, 1989, Varna, Bulgaria

Abstract

Silver halide materials for holographic recording have relatively low light sensitivity. This is due mainly to the small size of their emulsion microcrystals. The process of chemical sensitization of fine-grain emulsions is hampered by the following factors: 1. Microcrystals sized under 50 nm feature very high dimensional instability1. That is why when such emulsions are heated, processes of physical ripening ( dissolution of the small crystals and growth of the big ones) take place after which the sensitivity specks remain under the grain surface. The crystal growth is favoured in polydisperse systems, and such are almost all ultrafine-grain silver halide emulsions2. 2. The size of the microcrystals in the emulsions for holographic recording, that we investigate, is 10 nm. Electron micrographs show that grains of this size are spherical and do not have a clearly pronounced crystal form. There is a lot of equivalent, but not sufficiently deep defects on the surface. That is why, there are substantial difficulties for carrying out chemical sensitization whose objective is the formation of one or more efficient sensitivity specks on the surface of the microcrystals.

Citation Download Citation

Marga Pantcheva, Tsveta Petrova, Nina Pangelova, and Anton Katsev "Chemical Sensitization of Fine-Grain Silver Halide Emulsions for Holographic Recording", Proc. SPIE 1183, Holography '89, (12 April 1990); https://doi.org/10.1117/12.963804

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