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 *Vw\'%p*
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1、光疏射向光密 f:B>zp;N
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clear `qVjwJ!+
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close all X>YsQrK(ig
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n1=1,n2=1.45; U$dh 1;
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theta=0:0.1:90; 6[E|
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a=theta*pi/180; xVL5'y1g B
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rp=(n2*cos(a)-n1*sqrt(1-(n1/n2*sin(a)).^2))./(n2*cos(a)+n1*sqrt(1-(n1/n2*sin(a)).^2)); oh "O07
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rs=(n1*cos(a)-n2*sqrt(1-(n1/n2*sin(a)).^2))./(n1*cos(a)+n2*sqrt(1-(n1/n2*sin(a)).^2)); RB* J=
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tp=2*n1*cos(a)./(n2*cos(a)+n1*sqrt(1-(n1/n2*sin(a)).^2)); B+C );WQ,
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ts=2*n1*cos(a)./(n1*cos(a)+n2*sqrt(1-(n1/n2*sin(a)).^2)); )*; zW! H
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figure(1) ~c)~015`
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subplot(1,2,1); Y)N-V
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plot(theta,rp,'-',theta,rs,'--',theta,abs(rp),':',theta,abs(rs),'-.','LineWidth',2) 1&; QyTN
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legend('r_p','r_s','|r_p|','|r_s|') y2]-&]&
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xlabel('\theta_i') J_Ltuso
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ylabel('Amplitude') :1t~[- h^
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) '>$]{vQ3
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axis([0 90 -1 1]) C2Xd?d
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grid on +xc'1id@[
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subplot(1,2,2); fwK}/0%
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plot(theta,tp,'-',theta,ts,'--',theta,abs(tp),':',theta,abs(ts),'-.','LineWidth',2) HV6f@
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legend('t_p','t_s','|t_p|','|t_s|') "qc6=:y}
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xlabel('\theta_i') U=hlu
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ylabel('Amplitude') CPg+f1K
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) " D ?z
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axis([0 90 0 1]) F u&EhGm6
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grid on o9cM{ya/>
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Rp=abs(rp).^2; It2" x;
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Rs=abs(rs).^2; 5@^ dgq
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Rn=(Rp+Rs)/2; LM&y@"wfm
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Tp=1-Rp; $Of0n` e
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Ts=1-Rs; wdUBg*X8
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Tn=(Tp+Ts)/2; !S& L*OH,
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figure(2) >y Y'7Ey
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subplot(1,2,1); z{Mr$%'EY
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plot(theta,Rp,'-',theta,Rs,'--',theta,Rn,':','LineWidth',2) ~I{n^ Q/a
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legend('R_p','R_s','R_n') 5R i6Z#qm
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xlabel('\theta_i') n u'M
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ylabel('Amplitude') Zh _|m#)
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) 271&i
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axis([0 90 0 1]) qIld;v8w"g
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grid on 26xXl|I
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subplot(1,2,2); [,TkFbDq"J
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plot(theta,Tp,'-',theta,Ts,'--',theta,Tn,':','LineWidth',2) V*W;OiE_ 3
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legend('T_p','T_s','T_n') vap,y $C
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xlabel('\theta_i') <n(*Xak{a
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ylabel('Amplitude') ?wO-cnl
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) ;pnD0bH
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axis([0 90 0 1]) /{|fyK o\?
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grid on QcgfBsv96
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