中科大光学课件 chap4.pdf

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1、,ÛàI„ørà(Optics),ÛàI„ørà1/86Outline§1Iâr‰§2hr‰ørI„·—§3$_sLI„r‰:§4àô¯-ò…3Ÿ§5ò…3TOM§6+Œ9UŒéTM§7+Œ9TM(Optics),ÛàI„ørà2/86§4.1.1øraö(â„àŸË„aö9n¤à:-I:ï:$Íŵ^øràÂKöô-;I:/I:ô¥øI(P)=I1(P)+I2(P)øràÂKöô-;I:IŽI:ô¥øI(P)=I1(P)+I2(P)+DI(P)8h°:¤à:-ú°†—ø

2、ô„r‰a¹sI:†Í°(Optics),ÛàI„ørà3/86§4.1.1øraöÅ•aö‘‡øÅ•aöŒ/¨¹ôsL„/¨ÏÅ•aöøMî(Âßöô…3šaö(@â¨aöŒÅ(âÏâaöùIâ„r‰$:Í•Ø*EaöÂør„I/E'ôîÌI_r‰pI(P)=I1(P)+I2(P)+2I1I2cosd(P)(Optics),ÛàI„ørà4/86§4.1.2øMî$nIî$nøMî$náá³d(P)=2mp(m=0;1;2;


)„¹I:Ö•'<ð:r‰•'áá³d(

3、P)=(2m+1)p(m=0;1;2;


)„¹I:Ö•<ð:r‰•Iî$nåIâÏÇË(øMî¡—>•Qâ•„àUïÈ•QË(-â•2p2pd(P)=j1(P)j2(P)=r1(P)r2(P)l1l2ïåIîÿã2p2pd(P)=(n1r1n2r2)=DLl0l0áá³DL=ml0(m=0;1;2;


)„¹:r‰•'áá³DL=(m+1)l(m=0;1;2;


)„¹:r‰•20(Optics),ÛàI„ørà5/86§4.2.1hr‰hr‰(â„âbÖ$*!â•Ù$*!â

4、•;Rš„øMsû2p2p2pj01j02=(j0(t)R1)(j0(t)R2)=(R2R1)lll(Optics),ÛàI„ørà6/86§4.2.1hr‰Ìr‰žŒÂßOP¹p2pI(P)=I1+I2+2I1I2cosd;d=(r2r1)l¾I1=I2=I0I(P)=4I0cos2d2rrddr1=(x)2+D2;r2=(x+)2+D2222xd2xdd)r2r1==xr2+r12DD2pdI=4I0cos(x)Dl(Optics),ÛàI„ørà7/86§4.2.1hr‰P¹Mná³r2r1

5、=ml(m=0;1;


)sd=2mpö•'<4I0Iîø„¹ba®¿ëZ®a¹P¹Mná³r2r1=(2m+1)l=2(m=0;1;


)sd=(2m+1)pö•'<4I0Iîø„¹ba—¿ëZ—a¹—øô1b†r‰þ7,m§®¹ù”rr=ml=dx21DmD)xm=mlda¹ôÝDDx=xm+1xm=ldÌr‰žŒx‹pndmm;Dm;Dxmm(Optics),ÛàI„ørà8/86§4.2.1hr‰‚œ/ÌTr‰‚œi¹Œ:¹ýá³Ñtaödöz=D;x=d=2;y

6、=0$¹Ñú„Iâ(O„/E:A(d=2)2+x02+y02ikd0U˜(x0;y0)=eik[D+2D]e2Dx1DA(d=2)2+x02+y02ikd0U˜(x0;y0)=eik[D+2D]e2Dx2D(Optics),ÛàI„ørà9/86§4.2.1hr‰1àŸ2A(d=2)2+x02+y02kdU˜=U˜+U˜=eik[D+2D]cos(x0)12D2DA22kd02kd0)I=4()cos(x)=4I0cos(x)D2D2D:¦Ìr‰ø(Optics),ÛàI„ørà10/86§4.2.1h

7、r‰UrI/}Ie(Optics),ÛàI„ørà11/86§4.2.2r‰„y¹ìŠO„T°„¹I•sÏ*Tý³ê*I•ÑúIâr‰/Ë„IâKô„øràr‰/IâêñŒêñ„r‰r‰„Óœ•—I„ýÏ(zôÍ°bû—¤„r‰a¹r‰„I:Í/š
â:(Optics),ÛàI„ørà12/86§4.3.1$_sLI„r‰:ž°$_sLI„r‰H©ÀI_Z&(ˆTå·ÖÔƒ}„¹I••Çì_Æôûß:_sLIÇ_h—0ÍŒsLI_•©Ù$_sLI§¤

8、àú°r‰a¹‚þâMýpU˜(x;y)=Aei(kxcosa1+kycosb1+j10);U˜(x;y)=Aei(kxcosa2+kycosb2+j20)1122(Optics),ÛàI„ørà13/86§4.3.1$_sLI„r‰:¤à:-r‰:¦:I(x;y)=I0(1+gco