Victor J. Wagner Richard Malnory华格纳malnory胜利J

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1、RapidOpto-MechanicalDesignUsingPro/E,MSC/NASTRANandCodeV.VictorJ.WagnerRichardMalnoryK.Scott.EllisRaytheonMissileSystemsCompanyP.O.Box11337Bldg840,N0109BTucson,AZ85734-11337ABSTRACT:ThemechanicaldesignofOpticalsystems(Opto-MechanicalDesign)istypicallyconcernedwithm

2、inimizingtheimpactofthemechanicalstructureandenvironmentsonopticalperformance.Structurallyinsignificantloadsmayinduceunacceptablemotionand/ordistortionintotheopticalelements,whicharesummedalongtheopticalpathresultingintotalimagebluranderror.Opticalsystemdesignsaret

3、hereforeextremelysensitivetomountingconfigurationsandstructuraldynamiccharacteristicsofthemechanicalsystem.Aprocessforefficientdesigninvestigationisdiscussedthatprovidesrapidsystemandindividualopticalelementerrorpredictionsformechanicalsystemdesign.Topicsincludedis

4、cussionsoffundamentalOpto-Mechanicaldesignconsiderations,Pro/Emodelmodificationtofacilitateautomeshtechniques,variousautomeshapproachesusingMSC/PATRANandPro/Engineer,tet4vstet10elementperformanceandaccuracywithMSC/NASTRAN,LineOfSight(LOS)errorpredictions,andZernike

5、polynomialcalculationsforopticalsurfaceaberrationsusingtheMSC/OPOLYutilityandCodeV.________________________________________________________________________________Email:vjwagner@west.raytheon.com,rbmalnory@west.raytheon.com,ksellis@west.raytheon.com1INTRODUCTION:Ac

6、ommonconcernformechanicalengineersworkingonpackagingandmountingopticalsystemsistheinherentproblemofthemechanicalstructuredistortingtheopticalpathandthustheimage.Mountingrequiresphysicallyrestrainingtheopticalelements,eithermirrorsorlenses,byvarioustechniquesintoaco

7、mpletemechanicalsystem.Anymechanicalloadordisplacementimposedonthesystemistosomedegreetransferredintotheopticalelements,resultingindistortionoftheelementsfromtheirbaselineshapeandposition.Typically,opticalsystemsaredesignedbyopticsengineerswithoutfullaccountingofde

8、tailedmechanicalenvironmentalrequirementsormountingconstraintssuchaspackaging.Thentheelementpositioningandrestraintmethodsareiteratedbythemechani