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ID:51990588
大小:613.50 KB
页数:50页
时间:2020-03-27
《计算机辅助光学设计内容_code_V_S6.ppt》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、CODEVIntroductorySeminar:Day3OptimizingLensSystemsCustomizingCODEVReflectiveSystemsTilted/DecenteredSystemsSection6OptimizingLensSystemsTheAUTOOptionGoalofAutomaticDesign(Optimization)Bestperformancethatcanbeachieved,subjecttoproblemconstraintsT
2、hisrequiresAdefinederrorfunction(sometimescalleda“meritfunction”)AprocesstoimprovetheerrorfunctionAmethodofcontrollingboundaryconditions(constraints)WhatisanErrorFunction?AsinglepositivenumberthatrepresentsthequalityoftheopticalsystemStructuredsuchtha
3、tsmallervaluesarebetterthanlargervalues0isthebesterrorfunctionUsuallyrelatedtoaberrationsorimageerrorsCanincludecontributionsrepresentingnon-imageerrorconstraintsPossiblebutusuallynotneededinCODE VCODE VErrorFunctionFivetypesoferrorfunctionsinCODE V:W
4、eightedtransverserayaberrations(default)Wavefrontvariance(OPD-based)MTFFibercouplingefficiencyUser-definedContainsonlyimageerrorsinthedefaultcaseConstraintsarehandledseparatelyConstraintscanbeincludedifdesiredSeldomnecessaryinpracticeDefaultCODE VErro
5、rFunctionDefaulterrorfunctionisbasicallyaweightedRMSspotsizeTransverserayaberrationsareused(DXandDYfromchiefray)Allskewrays(noraysonmeridionalorsagittalplanes)Tracedforeachwavelength,field,andzoompositionWeightingisusedWavelengthweighting(defaultissam
6、easLDM)Fieldweighting(defaultissameasLDM,usersmaywishtooverridethis)Apertureweighting(defaulttriesfortightcorewithsomeallowedflare)TightcorewithsomeflareDy,DxRaydistributioninpupil12ray,allskewpatternTransverseaberrationsDxandDymeasuredfromchiefrayRed
7、ucingtheErrorFunctionCODE Vusesadampedleastsquares(DLS)algorithmforoptimizationVeryeffectiveatfindingthelocalminimumTwotypesofoptimizationLocaloptimizationFindsthenearestlocalminimuminerrorfunctionspaceMostcommonlyusedmethodGlobaloptimizationDonewithG
8、lobalSynthesis®(youcantryitveryeasilybychoosingOptimization>GlobalSynthesisanddefiningothernormalinputs)Findsmultiplesolutions(multiplelocalminima),eachoptimizedandmeetingallconstraintsIthasaspecialsearchalgorithmtofindpotentialsolutions,thenu
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