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 )2F%^<gZ#
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clear Oz=!EG|N
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close all djDE0-QxcR
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n1=1,n2=1.45; bhCAx W
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theta=0:0.1:90; B\>3[_n
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a=theta*pi/180; s)9 sb J
%z[" TVH
rp=(n2*cos(a)-n1*sqrt(1-(n1/n2*sin(a)).^2))./(n2*cos(a)+n1*sqrt(1-(n1/n2*sin(a)).^2)); w)}@svv"
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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)); ;!<@Fm9W
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tp=2*n1*cos(a)./(n2*cos(a)+n1*sqrt(1-(n1/n2*sin(a)).^2)); p F:C
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ts=2*n1*cos(a)./(n1*cos(a)+n2*sqrt(1-(n1/n2*sin(a)).^2)); 31mlnDif
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figure(1) '>% c@C[
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subplot(1,2,1);
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plot(theta,rp,'-',theta,rs,'--',theta,abs(rp),':',theta,abs(rs),'-.','LineWidth',2) L$; g f_L
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legend('r_p','r_s','|r_p|','|r_s|') P1"g62R
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xlabel('\theta_i') a0cW=0l=
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ylabel('Amplitude') oRl@AhS
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) D o!]t7Y$
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axis([0 90 -1 1]) @C5 %`{\
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grid on W u693<
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subplot(1,2,2); 13I~
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plot(theta,tp,'-',theta,ts,'--',theta,abs(tp),':',theta,abs(ts),'-.','LineWidth',2) OC2%9Igx0
su Z`
legend('t_p','t_s','|t_p|','|t_s|') [, mcvO;
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xlabel('\theta_i') /P a<I^-#
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ylabel('Amplitude') KnYHjJa
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) i<{/r-w=E
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axis([0 90 0 1]) Q9
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grid on "4i_ }
ps=QVX)YP
Rp=abs(rp).^2; m{0u+obi&w
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Rs=abs(rs).^2; pPZ^T5-ks
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Rn=(Rp+Rs)/2; XBHv V05mv
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Tp=1-Rp; |c!lZo/
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Ts=1-Rs; $a+)v#?,
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Tn=(Tp+Ts)/2; 58_aI?~>>
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figure(2) $6\W 8v
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subplot(1,2,1); k3t2{=&'&x
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plot(theta,Rp,'-',theta,Rs,'--',theta,Rn,':','LineWidth',2) lpeo^Y}N
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legend('R_p','R_s','R_n') \{`*`WQF
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xlabel('\theta_i') VEg/x z4c
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ylabel('Amplitude') &0S/]E`_M
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) &M^F A=J\
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axis([0 90 0 1]) zs@[!?A,
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grid on 5Ai$1'*p
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subplot(1,2,2); j\8'P9~%
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plot(theta,Tp,'-',theta,Ts,'--',theta,Tn,':','LineWidth',2) _ a,XL<9 I
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legend('T_p','T_s','T_n') dbLxm!;(
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xlabel('\theta_i') o] 7U;W
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ylabel('Amplitude') |1(9_=i'
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) )z?Kq0
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axis([0 90 0 1]) 15FGlO<<
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grid on rfNt
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