英文翻译原文.doc

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1、OpticalandElectro-OpticalEngineeringSeriesRobertE.FischerandWarrenJ.Smith,seriesEditorsOpticalandElectro-OpticalEngineeringSeriesRobertE.FischerandWarrenJ.Smith,seriesEditorsOpticalandElectro-OpticalEngineeringSeriesRobertE.FischerandWarrenJ.Smith,seriesEditorsOpticalandElectro-OpticalEngineeri

2、ngSeriesRobertE.FischerandWarrenJ.Smith,seriesEditorsOpticalandElectro-OpticalEngineeringSeriesRobertE.FischerandWarrenJ.Smith,seriesEditorsOpticalandElectro-OpticalEngineeringSeriesRobertE.FischerandWarrenJ.Smith,seriesEditorsInFigure3.4itcanbeseenthattheangleofincidenceatthissurfaceismuchlarg

3、erfortheupperraythanforthelower.OpticalandElectro-OpticalEngineeringSeriesRobertE.FischerandWarrenJ.Smith,seriesEditorsTheMerte’surfaceAstronglycurved,collectivecementedsurfacewithasmallindexbreak(totheorderof0.06)hasaneffectwhichcanbeusedtoreduceOpticalandElectro-OpticalEngineeringSeriesRobert

4、E.FischerandWarrenJ.Smith,seriesEditorstheundercorrectedzonalsphericalaberration.ThecentraldoubletoftheHektorlensshowninFig.3.5illustratesthisprinciple.3.6VignettingandItsUsesVignetting,whichissimplythemechanicallimitationorobstructionofanobliquebeam,isusuallyregardedprimarilyassomethingwhichre

5、ducestheoff-axisilluminationintheimage.However,vignettingOpticalandElectro-OpticalEngineeringSeriesRobertE.FischerandWarrenJ.Smith,seriesEditorsoftenplaysanessentialroleindeterminingtheoff-axisimagequalityaswellastheillumination.3.7EliminatingaWeakElement;theConcentricProblemOccasinallyanautoma

6、ticdesignprogramwillproduceadesignwithanelementofverylowpower.Frequentlythismeansthattheelementcanberemovedfromthedesignwithoutadverselyaffectingthequalityofthedesign.Oftenastraightforwardremovalwillnotwork;thedesignprocessmaysimply“blowup.”3.8BalancingAberrationsTheoptimumbalanceoftheaberratio

7、nsisnotalwaysthesameineverycase;thebestbalancevarieswiththeapplicationanddependsonthesizeoftheresidualaberration.Ingeneral,forwell-correctedlenses,theaberrationsshouldbebalancedsoastominimizetheOPD,thatistosay,thewavefrontvariance