§5-5-6圆孔的夫琅和费衍射课件.ppt

1、 drikrRikRAcKPEdexpexpPrQSRZZ dKrikrQEcPEexp 2l,ncos-r,ncosK,liklAexp,i1dKrikrexpd2l,ncos-r,ncosrikrexpliklexpiAPEcQEcE 111,1zrK2121211211zyyxxzr112121111112exp,exp,dydxyyxxzikyxEziikzyxE11112212zyyxxzyxzr111111122111yyxxexp,yx2zikexpexp,dydxzikyxEziikzyxE2a2ay,2b2bx11：fyxikcfyxikcyxEikffcAcAyxEdydx

2、ylxikyxEfyxikikffcEaaaabb2exp2bk2bksin2kla2klasinabdyikly-expdxiklx-exp2exp),(exp,exp,2expexp222b2b1122112211112222111122平面波入射fyfxlIIEEIyxsin,sin,2bk,2klasinsin2bk2bksin2kla2klasin220220*sin2sin22sin20kakaalkIIx)exp(1sinsinexpsinsinsinexpexpexpexp22112211221122112211ikldabcdxiklxbcabcdyyikdxiklxcdyy

3、ikdxiklxcPEadadbbadadbbaa ikldabcPEexp1sinsin2dkld 2cossin4220II2202sin2sinsinNII2sin22sin2sinN2,1,0sinsinmmidcosdmfddfddlcosdmddmNAmm1mnbn2dsinsinfrsinfycosfrcosfxddrrdrsinysinryrcosxcosrx111111111xy0r 111122exp2expdydxfyyxxikfyxikcPEfyxik2exp22ikffcAcexp 111020111110201111cosexpsinsincoscosexpddrr

4、ikrcPEddrrrrikcPEaa 即：dizzJ200cosexp21)(1100121101022krdkrJkrkcdrrkrJcPEkaa1krz kaka2J ca212ar0r111211krJkrkcPE)()(01zzJzzJdzd 1100121101022krdkrJkrkcdrrkrJcPEkaa 21021222zz2JIkaka2J caI2220 caIkaz fr 0zzJzzJdzd21a61.0fr,2a22f.1r22.1fkarz0000或mmfmmD120,30nm1.546mmDfr0025.022.10112121112exp,exp,dydxyyxxRikyxERiikRyxErikrAyxEexp,11Rr11RAAdydxRyyRxxikexpyx2RexpRiAy,x2expikRexpRAy,x2expexp1111222121112121式中则即ikERyxikERyxRikikrD22.10eeD22.1eeDDMD22.10Dff22.1fDN22.111nm550fDfDN,1490Dllr22.10ANun61.0sin61.02sinsinsinlDuunununsina0AnnBA