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 C2NJrg4(
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clear /Aoo h~
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close all Aq@_^mq1A
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n1=1,n2=1.45; 3CK4a,]Dm
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theta=0:0.1:90; 2j&-3W$^
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a=theta*pi/180; _\waA^ F
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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)); Fn.wd`'0
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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)); 6C@,&2<yK
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tp=2*n1*cos(a)./(n2*cos(a)+n1*sqrt(1-(n1/n2*sin(a)).^2)); *@[DG)N
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ts=2*n1*cos(a)./(n1*cos(a)+n2*sqrt(1-(n1/n2*sin(a)).^2)); j3jf:7 /\
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figure(1) l&2A]5C
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subplot(1,2,1); F * "
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plot(theta,rp,'-',theta,rs,'--',theta,abs(rp),':',theta,abs(rs),'-.','LineWidth',2) {)n m
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legend('r_p','r_s','|r_p|','|r_s|') :%cL(',Q
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xlabel('\theta_i') &m2FEQLj
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ylabel('Amplitude') %> Z;/j|#r
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) Hv2t_QjKT
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axis([0 90 -1 1]) MUsF/1
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grid on
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subplot(1,2,2); S\=j; Uem
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plot(theta,tp,'-',theta,ts,'--',theta,abs(tp),':',theta,abs(ts),'-.','LineWidth',2) Kcv7C{-/
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legend('t_p','t_s','|t_p|','|t_s|') Y-\/Y*;cd
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xlabel('\theta_i') O|j (CaF
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ylabel('Amplitude') 1M+o7HO.mG
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) R{Q*"sf
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axis([0 90 0 1]) (#x <qi,T
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grid on EUH&"8
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Rp=abs(rp).^2; ParOWs~W/
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Rs=abs(rs).^2; 1xN6V-qk
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Rn=(Rp+Rs)/2; ^UI{U1N~Bz
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Tp=1-Rp; s%F}4W2s
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Ts=1-Rs; vf6_oX<Os
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Tn=(Tp+Ts)/2; U6^ x(2De
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figure(2) A;~lG3j4
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subplot(1,2,1); qgREkb0
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plot(theta,Rp,'-',theta,Rs,'--',theta,Rn,':','LineWidth',2) N~7xj ?
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legend('R_p','R_s','R_n') 9gP-//L@
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xlabel('\theta_i') f P'qUN
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ylabel('Amplitude') : pj 00
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) x \taG.'zX
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axis([0 90 0 1]) ^Ud1 ag!-
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grid on _'pow&w~
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subplot(1,2,2); WJH-~ ,u
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plot(theta,Tp,'-',theta,Ts,'--',theta,Tn,':','LineWidth',2) k#mQLv
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legend('T_p','T_s','T_n') 0>@D{_}s
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xlabel('\theta_i') K_/-mwA v
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ylabel('Amplitude') VB
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) j{k]8sI,H]
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axis([0 90 0 1]) mZGAl1`8
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grid on oU/CXz?H
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