OPTICAL MODULATOR FOR LASER SPECKLE REDUCTION

An optical modulator (12) for speckle suppression in a laser projection system includes a first planar transparent conductor (20); a second optionally transparent planar conductor (26); a diffusing element (22) disposed between the first and second conductor; and an alternating voltage applied acros...

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Bibliographische Detailangaben
Hauptverfasser:	Kane Paul James, Reynolds James Henry, Lofftus Kevin D
Format:	Patent
Sprache:	eng
Schlagworte:	ACCESSORIES THEREFOR APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM CINEMATOGRAPHY 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 ELECTROGRAPHY FREQUENCY-CHANGING HOLOGRAPHY NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICAL LOGIC ELEMENTS OPTICS PHOTOGRAPHY PHYSICS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
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Beschreibung
Zusammenfassung:	An optical modulator (12) for speckle suppression in a laser projection system includes a first planar transparent conductor (20); a second optionally transparent planar conductor (26); a diffusing element (22) disposed between the first and second conductor; and an alternating voltage applied across the first and second conductors creates in-plane movement or distortion in the diffusing element to reduce laser speckle.