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 V}9wx%v
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clear Ks
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close all w^`n
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n1=1,n2=1.45; s/sH",
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theta=0:0.1:90; _E'M(.B<
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a=theta*pi/180; Q:-H UbB
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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)); A2rr>
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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)); '`[nt25N
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tp=2*n1*cos(a)./(n2*cos(a)+n1*sqrt(1-(n1/n2*sin(a)).^2)); Ju+@ROZ
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ts=2*n1*cos(a)./(n1*cos(a)+n2*sqrt(1-(n1/n2*sin(a)).^2)); s|,gn 5
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figure(1) sSD(mO<(
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subplot(1,2,1); LDPo}ogs
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plot(theta,rp,'-',theta,rs,'--',theta,abs(rp),':',theta,abs(rs),'-.','LineWidth',2) V!}, a@>p
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legend('r_p','r_s','|r_p|','|r_s|') Uut,cQ". d
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xlabel('\theta_i') YuPgsJ[m
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ylabel('Amplitude') ZklidHL');
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) 2s6Vy
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axis([0 90 -1 1]) UBC[5E$
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grid on /;.M$}Z>`
g_n=vO('X
subplot(1,2,2); L</"m[
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plot(theta,tp,'-',theta,ts,'--',theta,abs(tp),':',theta,abs(ts),'-.','LineWidth',2) ~}ewna/2
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legend('t_p','t_s','|t_p|','|t_s|') :K8T\
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xlabel('\theta_i') 8d$~wh
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ylabel('Amplitude') O]2h=M@q.
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) '!f5|l9SC
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axis([0 90 0 1]) -OkKLub
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grid on i:[B#|%
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Rp=abs(rp).^2; `L;I/Hp
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Rs=abs(rs).^2; f%@Y
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Rn=(Rp+Rs)/2; 6Jj)[ R\5=
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Tp=1-Rp; |
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Ts=1-Rs; 3(PU=
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Tn=(Tp+Ts)/2; $x2<D :
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figure(2) UNhD
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subplot(1,2,1); <B``/EX^
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plot(theta,Rp,'-',theta,Rs,'--',theta,Rn,':','LineWidth',2) =8J\;h
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legend('R_p','R_s','R_n') 94lmsE
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xlabel('\theta_i') u>? VD%
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ylabel('Amplitude') \+>b W(
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) `/|=eQ")o@
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axis([0 90 0 1]) .g|pgFM?
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grid on Aw|3W ]
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subplot(1,2,2); }3i@5ctQ
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plot(theta,Tp,'-',theta,Ts,'--',theta,Tn,':','LineWidth',2) y-Ol1R3:c#
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legend('T_p','T_s','T_n') TZ*ib~
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xlabel('\theta_i') /JfXK$`
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ylabel('Amplitude') (<<eHf,@
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) 8t7hN?,t
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axis([0 90 0 1]) 4u&l@BUr
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grid on ;x7SY;0*
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