天津大学工程光学第2章 总结与习题课件.ppt

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1、第2章总结与习题专业英语知识要点例题HanQun@TJU2012年5月28日13:50:151专业英语1.SomekeywordsandconceptsPrincipalplanesaredefinedasthelociwhererefractionisassumedtooccurwithoutreferenceastowhereitactuallydoesoccur.Principalpointsarethepointswheretheopticalaxisintersectsprincipalplanes.Focalpo

2、ints/planes(thefirst~,thesecond~/theobject-side~,theimage-side~)Focallengthisthedistancefromtheprincipalpointtothefocalpoint.Anon-axialpointobjectatinfinityandthesecondfocalpointareconjugate.Newton’slensequationsGauss’sequationHanQun@TJU2012年5月28日13:51:1422.Graphic

3、alconstructionHFFocalrayChiefrayParallelrayTheparallelrayisfirstparalleltotheaxisandthen,afterrefractionpassesthroughF’.ThefocalraypassesthroughFandthenisrenderedparalleltotheaxis.Thechiefraygoesthroughtheprincipalpointwithoutdeviation.H’F’FocalplanesHanQun@TJU2012

4、年5月28日13:51:1633.MagnificationTransverse/Lateral~isdefinedastheratioofimageheight,y',toobjectheight,y.Axial/Longitudinal~isdefinedastheratioofashortlength,ordepth,intheimagemeasuredalongtheaxis,totheconjugatelengthintheobject.Intheair,itisequaltothesquareofthetrans

5、versemagnification.Angular~isdefinedastheratiooftheanglebetweentwoconjugateraysandtheopticalaxis,i.e.,theratiooftheimage-sideangletotheobject-sideangle.Thetotalmagnificationofacombinationoflensesistheproductofthemagnificationoftheindividuallenses.HanQun@TJU2012年5月2

6、8日13:51:1744.NodalpointsNodalpointsarewherenorefractionoccurs.Whenevertherefractiveindicesoneithersideofthelensarethesame,thenodalpointscoincidewiththeprincipalpoints.Iftherefractiveindicesonthetwosidesofthelensaredifferent,theNpointswouldmoveawayfromtheprincipalpl

7、anes,towardthesideofhigherindex.2012年5月7日11:00:2055.OpticalpowerOpticalpoweristhereciprocalfocallengthor1dividedbythefocallength.Convergentlens–Positivelens~ConvexlensDivergentlens–Negativelens~Concavelens6.VisualopticalsystemObjective(lens)EyepieceThemagnification

8、ofavisualopticalsystemisgenerallydefinedasthetangentoftheanglesubtendedbytheobjectwith(orlookingthrough)theopticalsystemtothetangentoftheanglesub