Longitudinal PLZT light modulator

A spatial light modulator comprises a plate 32 of non-ferroelectric PLZT ceramic. An array of pixels 38a, 38b, 38c is formed by depositing a reflecting coating 34 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 sid...

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Bibliographische Detailangaben
Hauptverfasser:	WILLIAM H STEIER, EDDY A STAPPAERTS, GABRIEL G LOMBARDI
Format:	Patent
Sprache:	eng
Schlagworte:	DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING FREQUENCY-CHANGING NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
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Beschreibung
Zusammenfassung:	A spatial light modulator comprises a plate 32 of non-ferroelectric PLZT ceramic. An array of pixels 38a, 38b, 38c is formed by depositing a reflecting coating 34 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 40 in the plate effectively isolate the pixels from electrical and mechanical crosstalk.