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Publication numberUSH2045 H1
Publication typeGrant
Publication dateSep 3, 2002
Filing dateApr 29, 1997
Priority dateApr 29, 1997
Publication numberUS H2045 H1, US H2045H1, US-H1-H2045, USH2045 H1, USH2045H1
InventorsLynda E Busse, Ishwar D Aggarwal, John A Moon
Original AssigneeUsa
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Narrow band laser speckle suppression
US H2045 H1
Abstract
A method and apparatus for reducing points of zero intensity, i.e. speckle pattern, emerging from a multimode fiber. The apparatus comprises a beam deflector for rotating an input beam in a conical shape around a launch lens for projecting the beam into the fiber. The rotation of the beam further incorporates the use of two tilting mirrors being 90° out of phase to ensure a conical rotation. The conical rotation of the beam deflector ensures that the lens aberrations, which are rotationally symmetric, do not play a factor in beam alignment into the fiber aperture.
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Patent Citations
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US5892866 *Oct 1, 1996Apr 6, 1999Honeywell Inc.Fiber optic mode scrambler
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US7244028Dec 14, 2004Jul 17, 2007Coherent, Inc.Laser illuminated projection displays
US7355657Dec 14, 2004Apr 8, 2008Coherent, Inc.Laser illuminated projection displays
US7413311Sep 29, 2005Aug 19, 2008Coherent, Inc.Speckle reduction in laser illuminated projection displays having a one-dimensional spatial light modulator
US7633562Feb 6, 2008Dec 15, 2009Coherent, Inc.Laser illuminated projection displays
US8077367Dec 13, 2011Corning IncorporatedSpeckle mitigation in laser projection systems
US8130433Apr 29, 2009Mar 6, 2012Corning IncorporatedSpinning optics for speckle mitigation in laser projection systems
US8872361Jan 25, 2012Oct 28, 2014Briggs & Stratton CorporationStandby generators including compressed fiberglass components
US20060125969 *Dec 14, 2004Jun 15, 2006Chilla Juan LLaser illuminated projection displays
US20060126022 *Dec 14, 2004Jun 15, 2006Govorkov Sergei VLaser illuminated projection displays
US20070070302 *Sep 29, 2005Mar 29, 2007Govorkov Sergei VSpeckle reduction in laser illuminated projection displays having a one-dimensional spatial light modulator
US20080143888 *Feb 6, 2008Jun 19, 2008Chilla Juan LLaser illuminated projection displays
US20100277704 *Nov 4, 2010Jacques GollierSpeckle Mitigation in Laser Projection Systems
EP1923722A1 *Sep 1, 2006May 21, 2008Kabushiki Kaisha TOPCONMixing apparatus and distance measuring apparatus using same
WO2005003839A1 *Jun 23, 2004Jan 13, 2005Institut für Lasertechnologien in der Medizin und Meßtechnik an der Universität UlmMethod for directionally radiating and/or for directionally resolved radiation detection
WO2012069135A2Nov 2, 2011May 31, 2012Bundesrepublik Deutschland, vertreten durch das Bundesministerium für Wirtschaft und Technologie, dieses vertreten durch den Präsidenten der Physikalisch-Technischen BundesanstaltPhase-mixing device, lighting device, and method for reducing the spatial coherence of electromagnetic radiation
WO2012069135A3 *Nov 2, 2011Aug 2, 2012Bundesrepublik Deutschland, vertreten durch das Bundesministerium für Wirtschaft und Technologie, dieses vertreten durch den Präsidenten der Physikalisch-Technischen BundesanstaltPhase-mixing device, lighting device, and method for reducing the spatial coherence of electromagnetic radiation
Classifications
U.S. Classification385/31
International ClassificationG02B6/42, G02B6/14
Cooperative ClassificationG02B6/14, G02B6/4206
European ClassificationG02B6/14, G02B6/42C3B
Legal Events
DateCodeEventDescription
Sep 16, 1998ASAssignment
Owner name: NAVY, UNITED STATES OF AMERICA AS REPRESENTED BY T
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:MOON, JOHN A.;BUSSE, LYNDA E.;AGGARWAL, ISHWAR D.;REEL/FRAME:009470/0353;SIGNING DATES FROM 19970428 TO 19970429