Method for converting luminosity values into isochromates

Details Method for converting luminosity values into isochromates Method for converting luminosity values into isochromates

1979-05-03

1983-01-04

Willis, Davis L.

Radiant energy

Record projectors

250331, G03B 2100

Patent

active

043674070

ABSTRACT:
Luminosity values of a structure carrying information, in particular grey scale values, are transformed into corresponding isochromates. The transformation is effected by optically imaging the information carrying structure onto a layer of liquid crystals. By this means, a thermogram corresponding to the information carrying structure produced in the layer of liquid crystals, so that the luminosity values of the structure carrying information is transformed into isotherms in the layer of liquid crystals, and the isotherms are converted into isochromates as a result of the colour/temperature behaviour of the layer of liquid crystals.

REFERENCES:
patent: 3114836 (1963-12-01), Fergason et al.
patent: 3133194 (1964-05-01), Watson et al.
patent: 3331688 (1967-07-01), Altman
patent: 3401262 (1968-09-01), Fergason et al.
patent: 3438022 (1969-04-01), Teeg et al.
patent: 3666948 (1972-05-01), Mechlowitz et al.

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