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Proceedings Paper

Chemical Sensitization of Fine-Grain Silver Halide Emulsions for Holographic Recording
Author(s): Marga Pantcheva; Tsveta Petrova; Nina Pangelova; Anton Katsev
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Paper 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.

Paper Details

Date Published: 12 April 1990
PDF: 3 pages
Proc. SPIE 1183, Holography '89, (12 April 1990); doi: 10.1117/12.963804
Show Author Affiliations
Marga Pantcheva, Bulgarian Academy of Sciences (Bulgaria)
Tsveta Petrova, Bulgarian Academy of Sciences (Bulgaria)
Nina Pangelova, Bulgarian Academy of Sciences (Bulgaria)
Anton Katsev, Bulgarian Academy of Sciences (Bulgaria)

Published in SPIE Proceedings Vol. 1183:
Holography '89
Yuri N. Denisyuk; Tung H. Jeong, Editor(s)

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