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 6b\JD.r*{
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clear VTK +aI
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close all t"X^|!hKIF
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n1=1,n2=1.45; 9z7rv,
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theta=0:0.1:90; J6Nhpzp
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a=theta*pi/180; jQ dIeQD+
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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)); 8 j}o\!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)); \ %QA)T%
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tp=2*n1*cos(a)./(n2*cos(a)+n1*sqrt(1-(n1/n2*sin(a)).^2)); *`V r P
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ts=2*n1*cos(a)./(n1*cos(a)+n2*sqrt(1-(n1/n2*sin(a)).^2)); E6 fs&
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figure(1) 8@7leAq!
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subplot(1,2,1); CB`GiH/j
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plot(theta,rp,'-',theta,rs,'--',theta,abs(rp),':',theta,abs(rs),'-.','LineWidth',2) x57O.WdN
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legend('r_p','r_s','|r_p|','|r_s|') op61-:q/
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xlabel('\theta_i') nf, Ez
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ylabel('Amplitude') ;OS EMgB1
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) 4tz@?T Cb
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axis([0 90 -1 1]) x]vyt}oCmk
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grid on IgPU^?sp
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subplot(1,2,2); =h[;'v{
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plot(theta,tp,'-',theta,ts,'--',theta,abs(tp),':',theta,abs(ts),'-.','LineWidth',2) U _~r0
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legend('t_p','t_s','|t_p|','|t_s|') :Jo[bm
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xlabel('\theta_i') (8Te{K h '
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ylabel('Amplitude') >Y;[+#H[
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) ftP]WGSS>
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axis([0 90 0 1]) i w I}
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grid on CIAKXYM
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Rp=abs(rp).^2; I36ClOG
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Rs=abs(rs).^2; P7*?E *
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Rn=(Rp+Rs)/2; n\u3$nGL1`
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Tp=1-Rp; U[6
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Ts=1-Rs; 0xUn#&A~
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Tn=(Tp+Ts)/2; | v:fP;zc
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figure(2) IY}{ 1[<N
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subplot(1,2,1); U[NQ"
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plot(theta,Rp,'-',theta,Rs,'--',theta,Rn,':','LineWidth',2) wPaMYxO/
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legend('R_p','R_s','R_n') Qk].^'\
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xlabel('\theta_i') 6nW]Q^N}
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ylabel('Amplitude') bP7 _QYQ6
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) ;2'/rEq4o
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axis([0 90 0 1]) bH.f4-.u>)
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grid on FH7l6b,^
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subplot(1,2,2); iy [W:<c7j
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plot(theta,Tp,'-',theta,Ts,'--',theta,Tn,':','LineWidth',2) n(j5dN> ]
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legend('T_p','T_s','T_n') ~--F?KUnL
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xlabel('\theta_i') W&e}*
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ylabel('Amplitude') CMU\DO
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) aR}I l&
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axis([0 90 0 1]) fPab%>/T{
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grid on W4]jx ]
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