Process for the production of lightfast phase holograms utilizin

Details Process for the production of lightfast phase holograms utilizin Process for the production of lightfast phase holograms utilizin

1974-08-01

1977-06-14

Bowers, Jr., Charles L.

Gas separation: apparatus

Electric field separation apparatus

Electrode cleaner, apparatus part flusher, discharger, or...

96 27H, 350 35, G03C 522

Patent

active

040295079

ABSTRACT:
Hardenable gelatine recording materials are used in a process for the production of lightfast phase halograms. The recording material is hardened by the exposure to light and sensitized with ammonium dichromate. After exposure, it is developed, dehydrated and hardened. Development is carried out in a desensitizing bath containing formaldehyde sulphite and is followed by hardening in a formalin solution. Dehydration is carried out in two successive stages. In the first stage, the material is treated with an aqueous isopropanol solution and in the second stage with a concentrated isopropanol solution to which formaldehyde is added.

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Remy, H., "Treatise on Inorganic Chemistry", vol. 1, Elsevier Pub. Co., 1956, pp. 718-720.
Fillmore, G. L. et al., "Journal of the Opt. Soc. of Am.", vol. 61, No. 2, Feb. 1971, pp. 199-203.
Lin, L. H., "Applied Optics", vol. 8, No. 5, May 1969, pp. 963-966.
Megerhoff, D., "Applied Optics", vol. 10, No. 2, Feb. 1971, pp. 416-421.
Pennington, K. S. et al., "Applied Physics Letters", Feb. 1971, pp. 80-84, vol. 18, No. 13.
Shankoff, T. A., "Applied Optics", Oct. 1968, vol. 7, No. 10, pp. 2101-2105.
Fieser & Fieser, "Organic Chemistry", 1956, p. 198.
Mason, L. F. A., "Photographic Processing Chemistry", 1966, pp. 151-152.

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