Photographic products for direct observation and optical project

Details Photographic products for direct observation and optical project Photographic products for direct observation and optical project

1974-05-09

1976-11-02

Corbin, John K.

G02F 113

Patent

active

039893561

ABSTRACT:
A visual presentation sheet is provided with a photographic image stratum and a liquid crystal stratum. Under certain energy conditions, the liquid crystal stratum scatters incident light so that the photographic image stratum is visible by direct observation. Under other energy conditions, the liquid crystal stratum is cleared to enable optical projection of the photographic image stratum.

REFERENCES:
patent: 3650603 (1972-03-01), Heilmeier et al.
patent: 3700306 (1972-10-01), Cartmell et al.
patent: 3703331 (1972-11-01), Goldmacher et al.
patent: 3722998 (1973-03-01), Morse
patent: 3756694 (1973-09-01), Soref et al.
patent: 3824008 (1974-07-01), Smith
soref, "Thermo-Optic Effects in Nematic-Cholesteric Mixtures," J. Appl. Phys., vol. 41, No. 7, pp. 3022-3026, June 1970.

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