Compositions – Light transmission modifying compositions
Patent
1995-12-22
1998-06-02
Tucker, Philip
Compositions
Light transmission modifying compositions
252587, 252589, 430 19, 4304951, 430503, F21V 900, G03C 1100, G03C 100
Patent
active
057594473
ABSTRACT:
An erasable optical memory is provided by an erasable bistable photoactive chromophore that is covalently bonded to a polymer microsphere. An azobenzene chromophore that is bonded to the microsphere by an oxygen or NH replacement of chlorine, or a CH double bond to N, is preferred. An array of such microspheres is encoded by applying radiation at a resonant wavelength to induce a conformational change in the chromophores for selected microspheres, and the encoded pattern is read out by detecting changes in either absorption or fluorescence.
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Dalton Larry Raymond
Efron Uzi
Wiener-Avnear Eli
Wu Chiung-Sheng
Denson-Low W. K.
Duraiswamy V. D.
Hughes Electronics Corporation
Tucker Philip
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