Beam-shaping method for uniform illumination by superposition of tiltied Gaussian beams英文文献资料

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1、OpticalEngineering49
4,044203
April2010Beam-shapingmethodforuniformilluminationbysuperpositionoftiltedGaussianbeamsYanbingJiangAbstract.EfficientbeamshapingwithuniformilluminationisrequiredinHuiminYanlaseractiveimaginganddetectingsystems.Inthispaper,abeam-XiuDaZhangshapingmethodbysuperpositionoft

2、iltedfundamental-modeGaussianZhejiangUniversitybeamstoproducenearlyuniformilluminationisproposed.TheanalyticalStateKeyLaboratoryofModernOpticalformulafortheaverageintensityofpropagatingmultitiltedGaussianInstrumentsbeams
MTGBsisderivedandusedtostudytheuniformityofthebeamandprofilewithFourieranalys

3、is.ItisfoundthattheMTGBmaintainsitsNERCforOpticalInstrumentationflat-toppedshapeasitpropagatesanditsuniformityiscontrolledbytheNo.38ZhedaRoadparametersoffundamental-modebeamsandsuperposition.NumericalHangzhou310027Chinaexamplesaregiven.ThemethodisusedtoreconfigurethebeamsofaE-mail:yb_jiang@yahoo.com

4、.cnhigh-powerlaserdiodestacktoformaMTGBshapeforilluminationofa9
11.6-degangularfield.ThesimulationresultsfromASAPsoftwareshowashapingefficiencyof75%,andthermsdeviationoftheirradiancedistributionfromaflat-topshapeisapproximately8%.©2010SocietyofPhoto-OpticalInstrumentationEngineers.DOI:10.1117/1.3407

5、457Subjectterms:beams;illumination.Paper090555RreceivedJul.22,2009;revisedmanuscriptreceivedMar.3,2010;acceptedforpublicationMar.4,2010;publishedonlineApr.30,2010.1Introductionhastheadvantageofnearlyuniformdistributionthroughoutitsfar-Þeldpropagation.TheMTGBiscomposedofpar-Auniformlaserilluminato

6、rthathasaconstantandhomo-tiallycoherentGaussianbeamssimilartothebeamsfromgeneousintensityproÞleoverthetargethasawidevarietythelaserdiodes
LDsofaLDstack.Theanalyticalfor-ofapplications,e.g.,lidar,remotesensing,andactiveim-mulafortheaverageintensityofasingletilted1,2agingsystems.Severalwell-knownbe

7、amproÞleswithafundamental-Gaussian-modebeamisderived.Onthatba-nearlyuniformirradiancedistributionatacertaintrans-sis,aMTGBisintroduced.Theparametersthataffectits3Ð6verseplaneofthebeamhavebeenreported.uniformityan