Variable density optical filter

A light scattering liquid crystal transducer in which the degree of light scattering is controlled by impressing an electric field across the cell during and immediately after the application of a high-energy short duration thermal pulse applied to the entire viewed region of the cell. This allows f...

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Bibliographische Detailangaben
Hauptverfasser:	HAVEN, DUANE A
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 light scattering liquid crystal transducer in which the degree of light scattering is controlled by impressing an electric field across the cell during and immediately after the application of a high-energy short duration thermal pulse applied to the entire viewed region of the cell. This allows full gray scale to be achieved as a function of applied voltage.