第16章光的干涉课件.ppt

1、hEhEEfi hEE12 nm760400 )(cos0urtEE )(cos0urtHH E20EI v n )(1nc nc vvcn r2 nr2 nrL22 vrcL nr vrt 11,rn22,rn33,rn332211rnrnrnL iirn 12LL 12 2 1122rnrn cos220102202100EEEEE cos2201022021020EEEEEI cos22121IIII:2)1(k 2121max2IIIII :)12()2(k 2121min2IIIII :)12(2)3(kk maxminIII :)4(21II 1max4II 0min I 212

2、2k)12(k2,1,0 k 2 ：12 2,1,0 k 2)12(k k 1r2rrdD 12rr sind Dxd xCS2 12rr tand k 2)12(k 2,1,0 k2,10，kdDk xdDk)12(dDkdDk )1(dD kkxxx 1Ddx,1，小小，条条纹纹稀稀大大，d、D 大大，条条纹纹密密小小，d、D,2,1,0 kdDkx dDxxx 314 nm500m10537 Dxd 红红红红 dDkxk,3,2,1,0 kdDkx 明明纹纹位位置置：紫紫紫紫）（dDkxk1)1(紫紫红红)1(kkxx紫紫红红（)1 kk1.1 k1 k取：取：)1(9 nb bnb x

3、bn)1(9 m1053.86 sin2rd cosrLD dDx 2Ddkx Ddkx2)12(2,1,0 k2,10，ki 1L)(22BCABnL 12LL 2)(12 ANnBCABn iANn1 2 iBCAB iACANsin iesintan2 12sinsinnni cossin2122nen cose 2)(12 ANnBCABn cossinsin2ie 2sincos2cos2222 enen2cos22 en sinsin21nin 2sin222122 inne2)12(k k3,2,1 k3,2,1,0 k2)(12 ANnBCABn2cos22 eninne221

4、22sin2 2)12(k k=3,2,1,0 k3,2,1,0 kn1 n2 n3n1 n2 n3有半波损失有半波损失/2无半波损失无半波损失/2n1 n2 n3n1 n2 n32sin222122 inne2)12(k kii iii2sin222122 inne2)12(k kk1 k1 k4)12(2 kenen22 2)12(k k3,2,1,0 k45,43,4 MgF2玻璃玻璃 ken 22ken22 nm7321 nm3552 ken 2221242 ken nm14641 nm4882 nm2933 2)12(22 ken24)12(nke nm113 2min4ne en1

5、2ken12 nm11041 nm5522 nm3683 k 2121 ken nm22081 nm7362 nm6.4413 3,2,1221 kken nm4.3154 0 i22 ne2)12(k k3,2,1 k3,2,1,0 k)21(2 kn nk2 3,2,1 k3,2,1,0 k e20 ：ee ne2 n4 sin2nl kkeel 1sin e n2 n2 2 le l 2 e被检体被检体被检体被检体Ld tansin sin2nl lLd2 nme2 2)12(22 ken24)12(nkeA nm9204112 n 5 kmm14317.030295.4 l tanLD

6、 n2 lL2 m10944.55 L 2 kne 22212max nDk6.141 nl2 nDL2 m105.84 krkr222)(kkeRRr 22kkeRe keR Rrekk22 krnRk)21(nRk.3,2,1,0 k明环明环暗环暗环22 ne2)12(k k3,2,1 k3,2,1,0 kke.3,2,1 knkRnRkrrkk/)1(1 nRkk/)1(nRkk/)1(1 k1 knRkr/nRkr/121 nRkr/222 nkkrrR)(122122 nRkkrr)(122122 R，测测)1(kRrk Rkrk)5(5 cm79.65225 kkrrR42 Rrk

7、k Rre22 1212Rrhk 2222Rrhk 22 ke2 kek 2)12(k21hhek )11(2212RRrk 212211kkreRR 211krkR cm8.1022 R2 Nd Nd2 m10849.57 kln )1(2lkn2/1 20.021046.52057 31028.0 00028.1 nl1r2r1r2r)21rr 1r2r)(12Lrr 1r2r)(12Lrr tcLL tcL 1 2 12 2L c 2 ct 1 21 ct Ltc221 2L)()1(max kk k 2max 2maxL 2L 光的单色性越好，光的单色性越好，光的相干长度就越长，光的相干长度就越长，光的时间相干性也就越光的时间相干性也就越好。好。结论：结论：I0/2I01 2 )A(o)A(o )m(L发光物质发光物质Na58935889.965895.93 0.13.4 10-2Hg5460.73 0.13 10-2NeHe 激光激光6328 10 10-7 40 103Kr866057 0.0047 1.02/b2/22 dRb dRb b brd b )(rdbbrd b