| 200833 |
2017-11-26 22:33 |
利用MATLAB光学仿真（1）
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 mtv8Bm=<
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1、光疏射向光密 Kn~Rck|
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clear 1 .!U{>$
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close all (P)G|2=
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n1=1,n2=1.45; |GnTRahV.
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theta=0:0.1:90;
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a=theta*pi/180; 5Ml=<^
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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)); !?>V^#c
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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)); h+ [6i{
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tp=2*n1*cos(a)./(n2*cos(a)+n1*sqrt(1-(n1/n2*sin(a)).^2)); WBE>0L
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ts=2*n1*cos(a)./(n1*cos(a)+n2*sqrt(1-(n1/n2*sin(a)).^2)); E^i]eK*"
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figure(1) y+(\:;y$7
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subplot(1,2,1); sT\:**
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plot(theta,rp,'-',theta,rs,'--',theta,abs(rp),':',theta,abs(rs),'-.','LineWidth',2) T`EV
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legend('r_p','r_s','|r_p|','|r_s|') vQEV,d1
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xlabel('\theta_i') <sH}X$/
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ylabel('Amplitude') Pv'Q3O2<I
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) X NJ4T]><
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axis([0 90 -1 1]) eTuqK23
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grid on ZL!u$)(V
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subplot(1,2,2); Q7s@,c !m_
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plot(theta,tp,'-',theta,ts,'--',theta,abs(tp),':',theta,abs(ts),'-.','LineWidth',2) ~ nsb
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legend('t_p','t_s','|t_p|','|t_s|') 0xB2
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xlabel('\theta_i') =gB5JB<}2
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ylabel('Amplitude') hS]w
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) xVm-4gB
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axis([0 90 0 1]) A]z*#+Sl
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grid on O`5,L[i1y
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Rp=abs(rp).^2; <)VgGjZ-H
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Rs=abs(rs).^2; tb3V qFx
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Rn=(Rp+Rs)/2; 8|a./%gixs
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Tp=1-Rp; ScPVjqG2{
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Ts=1-Rs; 2{OR#v~
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Tn=(Tp+Ts)/2; `Fy-"Uf
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figure(2) ^J'_CA
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subplot(1,2,1); :KLXr r
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plot(theta,Rp,'-',theta,Rs,'--',theta,Rn,':','LineWidth',2) Jup)m/
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legend('R_p','R_s','R_n') G.W !
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xlabel('\theta_i') 9njwAKF?
kx"1 0Vw
ylabel('Amplitude') hx;f/E Px
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) #~ u0R>=
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axis([0 90 0 1]) aB9!}3@
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grid on n<I{x^!
Ut Z,q!sg
subplot(1,2,2); zZ5:)YiW-
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plot(theta,Tp,'-',theta,Ts,'--',theta,Tn,':','LineWidth',2) g)D_ !iz
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legend('T_p','T_s','T_n') _VtQMg|u
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xlabel('\theta_i') C8N)!5(A
!rvEo =^
ylabel('Amplitude') )Fw/C u
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) qWt}8_ "
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axis([0 90 0 1])
xmW~R*^
.g*j]!_]
grid on @f!X%)\;x
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