利用菲涅尔公式计算光波在两种介质表面折反射率及折反射能流密度 7,2 bR
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1、光疏射向光密 =X1 1x)]F9
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clear 5[Yzi> o[
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close all F\Gi;6a
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n1=1,n2=1.45; j9YI6X"
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theta=0:0.1:90; 8I'c 83w
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a=theta*pi/180; Vx^+Z,y&QP
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rp=(n2*cos(a)-n1*sqrt(1-(n1/n2*sin(a)).^2))./(n2*cos(a)+n1*sqrt(1-(n1/n2*sin(a)).^2)); d[5?P?h')
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rs=(n1*cos(a)-n2*sqrt(1-(n1/n2*sin(a)).^2))./(n1*cos(a)+n2*sqrt(1-(n1/n2*sin(a)).^2)); 0BM3:]=wr
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tp=2*n1*cos(a)./(n2*cos(a)+n1*sqrt(1-(n1/n2*sin(a)).^2)); Nj_h+=UE!
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ts=2*n1*cos(a)./(n1*cos(a)+n2*sqrt(1-(n1/n2*sin(a)).^2)); >?q()>l
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figure(1) G:QaWqUb
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subplot(1,2,1); R*D0 A@
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plot(theta,rp,'-',theta,rs,'--',theta,abs(rp),':',theta,abs(rs),'-.','LineWidth',2) ! 3O#'CV
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legend('r_p','r_s','|r_p|','|r_s|') YAqv:
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xlabel('\theta_i') +.T&U7xV
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ylabel('Amplitude') i*' 6"
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) aCe<*;b@
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axis([0 90 -1 1]) T< "Hh.h
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grid on @54D<Lj
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subplot(1,2,2); : uglv6
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plot(theta,tp,'-',theta,ts,'--',theta,abs(tp),':',theta,abs(ts),'-.','LineWidth',2) q"@Y2lhD!
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legend('t_p','t_s','|t_p|','|t_s|') TpLlbsd
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xlabel('\theta_i') =l
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ylabel('Amplitude') "If]qX(w
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) ][1 *.7-
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axis([0 90 0 1]) Cvr?%+)$M
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grid on !S A j V)
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Rp=abs(rp).^2; tY^ MP5*
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Rs=abs(rs).^2; )54;YK
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Rn=(Rp+Rs)/2; Mj2o>N2,
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Tp=1-Rp; L y1V@
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Ts=1-Rs; #I jG[a-
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Tn=(Tp+Ts)/2; 6\ g-KO
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figure(2) ,*SoV~
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subplot(1,2,1); bLyU;
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plot(theta,Rp,'-',theta,Rs,'--',theta,Rn,':','LineWidth',2) rnvKfTpZDU
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legend('R_p','R_s','R_n') w,fA-*bZ 0
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xlabel('\theta_i') ]0 3+8 #J
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ylabel('Amplitude') T2-n;8t
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) <u2 rb6
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axis([0 90 0 1]) @giJ&3S,
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grid on MYgh^%w:
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subplot(1,2,2); CPssk,q~C
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plot(theta,Tp,'-',theta,Ts,'--',theta,Tn,':','LineWidth',2) 41f4zisZ
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legend('T_p','T_s','T_n') ))Ws{
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xlabel('\theta_i') tW4|\-E"s4
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ylabel('Amplitude') 0'T*l 2Z`2
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) 0?hJ!IT;q7
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axis([0 90 0 1]) +X)n} jh
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grid on +DMD
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