Optical: systems and elements – Optical modulator – Having particular chemical composition or structure
Patent
1991-11-13
1993-06-22
Moskowitz, Nelson
Optical: systems and elements
Optical modulator
Having particular chemical composition or structure
385 3, 359258, G09G 316, G02F 128
Patent
active
052219895
ABSTRACT:
A spatial light modulator comprises a plate of non-ferroelectric PLZT ceramic. An array of pixels is formed by depositing a reflecting coating in the desired array on one side of the plate. A longitudinal electric field is applied so that the light entering the plate from the side opposite the reflecting coating experiences a polarization-independent refractive index change when the electric field is applied as it propagates parallel to the electric field. The required voltages may be decreased when a partially reflecting coating is deposited on the side opposite the reflecting coating. Grooves in the plate effectively isolate the pixels from electrical and mechanical crosstalk.
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Lombardi Gabriel G.
Stappaerts Eddy A.
Steier William H.
Anderson Terry J.
Block Robert B.
Hoch Jr. Karl J.
Moskowitz Nelson
Northrop Corporation
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