资源描述：
《光学 - Aberration Correction Using Adaptive Optics in an Optical Trap英文学习资料》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、AberrationCorrectionUsingAdaptiveOpticsinanOpticalTrapCarrieVoycheck,2006AdvisedbyDanielG.Cole,ResearchAssistantDepartmentofMechanicalEngineeringIntroductiontrapiscreatedwhenthegradientforcesaregreaterthantheTheprocessingofopticaltrappingisextremelyusefulinscatt
2、eringforces.thebiologicalsciencesformanipulatingmicroscopicparticlesTheopticaltrappingsystemconsistsofalaserpropagatingandorganismsusinglaserlight.Imperfectionsintheelementsthroughfourlensesandintoaninvertedmicroscopeinordercomprisingtheopticaltrapcausedeformati
3、onsinthelasertotrapaspecimenonthestage.Herethebeampartiallybeam,whichdecreasetheeffectivenessofthetrap.Theoverfillsthemicroscopeobjective.MovingfromthelasertothewavefrontdistortiononthebeamcanbedescribedbyZernikeobjective,thefocallengthofthelensesare:500mm,(SLM,p
4、olynomialsordiskharmonicfunctions.Thecoefficientsofseebelow),750mm,300mm,and150mm.Themicroscopethesefunctionscanbemanipulatedtocompensatefortheobjectiveis100x(focallengthof1.64mm).Whenconstructingaberrationmakingadiffractionlimitedspot,andtherefore,asinglebeamopt
5、icaltrap,anobjectivewithahighnumericalamoreeffectivetrap.Theaberrationcorrectionisperformedapertureisnecessaryinordertobringthebeamtoatightfocus.usinganadaptivesimulationintheprogramminglanguageTwotelescopes,createdbyL1andL2,andL3andL4(FigureMATLAB.Threeelements
6、arerequiredinanadaptive2),areusedtomatchthesizeofthebeamattheentrancepupiloftheobjectivetothespatiallightmodulator(SLM).2Aspatialopticssystem:awavefrontsensor,acorrectiveelement,andafeedbackorcontrolloop.Asensorconsistingofapinholelightmodulatoriscapableofconver
7、tingdatainincoherentandapowermeter,oracameraandacostfunctionareusedopticalformintospatiallymodulatedcoherentopticalsignals.todetectandmeasuretheaberrationmodes.AmeansforTherearetwotypesofSLM’s:electricallywrittenandopticallycorrectingtheaberrationsdetectedbythes
8、ensorwascreatedwritten.Thelatterisusedhereandwillconvertanincoherentusingaspatiallightmodulator(SLM).Theadaptivecontrolimageintoacoherentimageforfurtherprocessingbyth
