ODZ_Optical design with Zemax Exercise 4.pdf

《ODZ_Optical design with Zemax Exercise 4.pdf》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、2012-11-28Prof.HerbertGrossFriedrichSchillerUniversityJenaInstituteofAppliedPhysicsAlbert-Einstein-Str1507745JenaExercisesLectureOpticaldesignwithZemax–Part44Aberrations4.1StrehlratioandgeometricalvsdiffractionPsfspotsizeAsinglelensmadeofK5withfocallengthf=

2、25mmandthicknessd=5mmisilluminatedbyadivergingbeamwithnumericalapertureNA=0.1.Afterthelensthelightshouldbecollimated.Ifthecollimatedbeamisrefocussedwithoutfurtheraberrations,thepointspreadfunctionisnotdiffractionlimited.a)CalculatetheaccurateStrehlratio,the

3、estimatedStrehlratioandthegeometricalanddiffractionencircledenergyinsidetheidealAirydiameter.b)Ifnowthenumericalapertureisreduced,theMarechalestimationbecomesbetter.CalculatethelargestNA,forwhichtherelativeerrorissmallerthen2%.Whatamountforgeometricalanddif

4、fractionencircledenergyisinsidetheAirydiameterisobtainedhere?4.2AberrationsandPerformanceofanDiodeCollimatorLoadthelensGLC-6.5-8.0-830DIODELASERCOLLIMATINGLENSfromthecatalogofCVIMellesGriot.a)Whatisthenumericalapertureofthelensintheimage?DeterminetheStrehlr

5、atioandcomparetheestimatedandtheexactvalue.b)Whatarethetwosurfaceswiththelargestcontributiontothesphericalaberration?Thefirstlensgroupslookslikeanachromate.Correspondsthecorrectionofthispartofthesystemtoanachromate?c)Show,thatallintersectionpointsofthespotd

6、iagramareinsidetheAirydiameter.Ifthespotisanalyseditisseen,thatthereisabrightkernelwithasurroundinghalo.Whatistherelativepowercontentoftheinnerkernelregion?Whatisthediameterofthisinnerpart?d)Whatistheimagecontrastofagratingobjectwith100linepairspermillimete

7、rofthissystem?DeterminetheMTFofthelensfordefocussing.Whatisthedepthoffocusintervall,whereinsidethecontrastislargerthan50%?Explaintheasymmetryofthecurve.4.3AnamorphoticDiodecollimatorAsemiconductordiodewithwavelength650nmandthedivergence/aperturevalues0.4/0.

8、1inthefastansslowaxisrespectivelyshouldbecollimatedinacircularbeamwithadiameterofapproximarely8mm.ThecollimatedbeamisnowfocussedintoafiberwithnumericalapertureofNA=0.1.1/22semiconductordiodecircularbea