242003M12 =S(1S)JOU RN AL OF TAIYUAN TEACHERS COLLEGE ( Natural Science Edition)Vol. 2 No. 4Dec. 2003增透膜和增反膜赵秀琴(太原师范学院物理系,山西太原 030012)K1文章首先阐述了在目视光学仪器表面镀一层增透膜的原理,通过计算得出应选择透明介质的折射率和膜的厚度.由单层膜推广到双层膜及多层膜.其次阐述增反膜的原理,通过类比的方式推出多层增反膜时光反射的公式,最后说明了增反膜的应用.1oM增透膜(消反膜);反射率;透射率;增反膜cI| 1672-2027( 2003)04-0042-04ms|O436. 1DSMA;HQ|,V?A,i,;?iiV,79BsVQ1.,B;d,;91VBi;i;V,Bs;Q,Bs;|.c9Q、|T,;QqR(Q;,;iVB,|qlN|qP;/VQ;Mh,VPQ;?hl,i;?M9v.,S9ihQ.A,B9iV?HohQ.m1;QUimFig. 1 The sketch map of reflectionduring the light in single layer film2j;Nj$Ko0= 550 nms;s;,vMK;os;.,T;p9ihV,o0,nd= 0 /4, 30 /4,50 /4, ,5o0QqKl,iqTKv,Hhhs;Q,7,;yQhHqQ.p9ivMh;/,.2. 1i|q!;b,r,5In;,13M1p;M,m1U.!A0,c9T, RrA,;Qq9v.2. 3;Z;hQV;Z;,VBZc9T#hQ1p(Q;MMQ,M)$.Q;Mh,P;i.1|qn2l|qn3pQq9lpHQq.2. 4m2;QUimFig. 2 The sketch map ofreflection during the lightin donuble-layer filmsKe.T|qngGQp|(nh)|(n1)GQ;/4nrh;,IHq2?m2U.;QqR0= n0- ngn0+ ng2,5pBQ(n1),NHQqR1= n0- n2h /ngn0+ n2h /ng27n1= n2hng,5R1=n0- n1n0- n12#BHQqVr|qQq,p=|q(n1)H,R2 = n0 - n21 /nn0 - n21 /n12= n0 - (n1 /nh)2ngn0+ (n1 /n - h)2ng2PQ;Mh,A:n0 - (n1 /nh)2ng = 0n1 /nh = n0 /ng9iB|q1. 38,QVV4%hl1. 4% ,XVB;dhQ1p,;d,Q,y7?ZQ,/,;d981p,4a981p,4aK6hQ.V9V9i,Vn;Ql,7iqVr99. 5% ,yNHA.,V40.m3;QUimFig. 3 The sketch map of reflectionthe light in multiple-layer the films39Q;d19Q,.1pQqr99. 9% .,jB|qvj|qsBo,?9Q.9V,jpB|qn1,QqR1 = n0 - n21 /ngn0+ n21 /ng2TV,|qv,5Qqv,|q=(n1= 2. 45)T.R = 1 - 2. 452 /1. 51+ 2. 452 /1. 52= 0. 36= 36%LV?z9Q.y-s1j|qi,A,PQ;M,V7PQ;9);Q;2,4,6. . ,yQ(MM,Q;y=;Mc,3c, 5c.yNS;9(;QM,TQ;M,MF,M9.m3U.Lb(AQ.9.Vwp(2s+ 1)|qH,;QqR2s+ 1 = n0 - (nh /n1)2sn2h /ngn0+ (nh /n1)2sn2h /ng2Vnnh /ngv,5;Qq.7n0= 1,nh= 2. 40,n1= 1. 38,ng= 1. 5,2s+ 1= 17H,R17 = 1- (2. 40/1. 38)162. 402 /1. 501+ ( 2. 40/1. 38)162. 402 /1. 5 = 0. 999 85 99. 98 5%,;?vs$Q,rQ.;QV9Q,4Qq;thJ,VB9Q,dL8i3.ID:1u:,.;() M .:v, 198223,).45YM .:, 19993.(/) M .:, 2001Transmission IncreasingFilmandReflectionIncreasingFilmZhaoxiuqin(Department of Physics, Taiyuan Teachers College, Taiyuan 030012, China)AbstractIt has first been expounded at the eye inspection optical instrument surfaceandplates one layer of principle that transmission increasing film,and reaches thickness that shouldselect the refractive index of transparent medium film by way of counting. By single layer of filmpopularizing to the double-lagers of films and the multiple-layers of films. Next expounding theprinciple that reflection increasing film, the method by way of the analogy is introduced to multi-ple-layers reflection increasing film to increase the formula and has finally explained the applica-tion.Keyword