计算机辅助光学设计-code-V-S2

3280EastFoothillBoulevardPasadena,California91107USA(626)795-9101Fax[phone]e-mail:[e-mail]:[phone]Fax[phone]e-mail:[e-mail]:‹#›WhatisCODEV?•A“powertool”foropticaldesignandengineering•Includesawiderangeoftechnicalfeaturesfor:–Creatingmodelsofdiverseopticalsystems–Evaluatingopticalperformanceinmanyways,withtabularandgraphicaloutput–Optimizingtheopticalsystemwithvariouserrorfunctionsandconstraints–Preparingforfabrication(toleranceanalysisandmore)•Modernuserinterfacegivesquickaccesstoallfeatures,withacommandandmacrolanguageavailableforadvancedandcustomapplicationsIntroductiontoCODEVTraining,Fall2003,Slide2-‹#›InterfaceElementsTitleBarNavigationWindowMenuBarToolbarLDMSpreadsheetCommandWindowCommandLinePlotWindowStatusBarTabbedOutputWindowIntroductiontoCODEVTraining,Fall2003,Slide2-‹#›LDMandOptions•CODEVhastwomajorlevels,LDMandOptions–LDMisLensDataManager,wherelensdataisdefinedandmodified–Optionsarespecialcalculationsrequiringmultipleinputs,e.g.,spotdiagram,MTF,AutomaticDesign•TheLDMisoperatedfrommenus,toolbars,anddialogboxes(orfromthecommandline)•Optionsarelaunchedfrommenusandcontrolledfromtabbeddialogboxes–Eachoptioncreatesitsowntabbedoutputwindow(TOW)–Optioninputcanbemodifiedorre-runfromitsTOWIntroductiontoCODEVTraining,Fall2003,Slide2-‹#›SystemDataandSurfaceData•LDMdataisdividedintotwomajorcategories–SystemDataspecifiesoverallpropertiessuchasf/numberandwavelengths–SurfaceDataspecifiesanydatathatchangeswithsurfacenumber,fromthicknesstodecenterstotolerances•SystemDataisaccessedthroughtheLensSystemdatamenu,whichdisplaysamulti-tabbeddialogbox•SurfacedataisaccessedfromtheLDMspreadsheetandfromtheLensSurfacePropertiesmenu–LDMspreadsheetdisplaysbasicdata–SurfacePropertiesdialogshowsalldataforasurfaceIntroductiontoCODEVTraining,Fall2003,Slide2-‹#›DigitalCameraDesignStudy•ThissectionisbasedontheDigitalCameraObjectiveexampleintheCODEVIntroductoryUser’sGuide•Whatyouwilllearn:–UsetheNewLensWizardtoselectapatentlensasastartingpointforanewdesign–ChangetheSystemDataasneededforthenewapplication–Workwithsystemdata,basicsolves,lensdrawings,surfacedata,scaling,MTF,andmore–UseOptimizationtoimprovethelens–PerformToleranceAnalysis•Asimilarproblemwillbeposedasaworkshopattheendofthissection(solutionscriptintheAppendix)IntroductiontoCODEVTraining,Fall2003,Slide2-‹#›DigitalCameraSpecsSmallnumberofelements(1-3)madefromcommonglassesorplasticsImagesensor(baselineisAgilentFDCS-2020)a.TypeCMOSb.Resolution640x480effectivepixelsc.Pixelsize7.4x7.4micronsd.Sensitivearea3.55x4.74mm(fulldiagonal6mm)ObjectiveLense.FocusFixed,depthoffield750mm(2.5ft.)toinfinityf.FocallengthFixed,6.0mmg.GeometricDistortion4%h.f/numberFixedaperture,f/3.5i.SharpnessMTFthroughfocusrange(centralisinner3mmofCCD)Lowfreq.,17lp/mm90%(central)85%(outer)Highfreq.,51lp/mm30%(central)25%(outer)j.VignettingCornerrelativeillumination60%k.TransmissionLensalone,80%400-700nmIntroductiontoCODEVTraining,Fall2003,Slide2-‹#›NewLensWizard•TheNewLensWizard(NLW)isdesignedtopromptyouthroughthesetupofavalidlens,usingoneoffoursources:–CODEVSampleLenses–PatentDatabase(about2400lenses)–YourownFavorites(whichyoucaneasilycollect)–Ablanklens•Inthiscase,wewillusethepatentdatabase,makinguseofthe“filter”capabilitytonarrowdownthesearchbasedontherequiredspecificationsIntroductiontoCODEVTraining,Fall2003,Slide2-‹#›RuntheNewLensWizard•ChoosetheFileNewmenutolaunchtheNLW–ClickNexttocleartheWelcomeScreen–ClickthePatentLensbutton,thenclickNext•ClicktheFilterbuttontoopenthepatentfilterdialogIntroductiontoCODEVTraining,Fall2003,Slide2-‹#›FilterDialog•Checktheitemsofinterestandenterminandmaxvaluesforeach,thenclickOK.–F/#goalis3.5(try1to4),FieldofViewgoalis26.5°(try20to33),try1to3fornumberofelements.Notethatthisisactuallythesemi-fieldofview,whichcorrespondstoobjectorimageheightIntroductiontoCODEVTraining,Fall2003,Slide2-‹#›FilterResults•Thefilterreturnsaround12lenses–Widerfieldandfasterf/numberthanneededisbest–Thetripletor02248looksprettygood(f/2.4,27.5°)•ClicktheNextbuttonNotethateachpatentlensfileincludesalensdrawing,andthisoneshowsthreedefinedfieldanglesIntroductiontoCODEVTraining,Fall2003,Slide2-‹#›DefiningSystemData•Systemdatadefinesthewaythelenswillwork–Requiredsystemdataitemsarepupilsizeandwavelengths–TheseplusfieldofviewcanbedefinedintheNLW–ManyadditionalsystemdatavaluescanbedefinedormodifiedthroughLensSystemData•Pupildefinition–Asmentionedearlier,thepupilsizesetsthelight-gatheringpowerofthesystemandcanbedefinedinseveralways•Wavelengths–Atleastonewavelengthmustbedefined,andupto21areallowed,alwaysenteredinnanometersIntroductiontoCODEVTraining,Fall2003,Slide2-‹#›FieldDefinition•“FieldofView”(FOV)describesthesizeoftheobjectorimagethatalenscanhandle–Iftheobjectisatinfinity,angularmeasureisused–Forfiniteobjectdistances,objectorimageheightcanbeuse