[分享]利用MATLAB光学仿真（1） [复制链接]

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 ?zhI=1ED%  
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1、光疏射向光密 WpJD=C%  
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clear Iu-'o  
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close all a81!~1A  
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n1=1,n2=1.45; e+F}9HR7  
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theta=0:0.1:90; z)&naw.  
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a=theta*pi/180; k(-Z@  
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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)); %$ir a\ sM  
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rs=(n1*cos(a)-n2*sqrt(1-(n1/n2*sin(a)).^2))./(n1*cos(a)+n2*sqrt(1-(n1/n2*sin(a)).^2)); 192.W+H<  
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tp=2*n1*cos(a)./(n2*cos(a)+n1*sqrt(1-(n1/n2*sin(a)).^2)); !@^y)v  
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ts=2*n1*cos(a)./(n1*cos(a)+n2*sqrt(1-(n1/n2*sin(a)).^2)); y$j
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figure(1) `z3|M#r\;  
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subplot(1,2,1); P1)* q0  
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plot(theta,rp,'-',theta,rs,'--',theta,abs(rp),':',theta,abs(rs),'-.','LineWidth',2) wGOMUWAt  
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legend('r_p','r_s','|r_p|','|r_s|') *=$[}!YG  
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xlabel('\theta_i') eW%L$I  
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ylabel('Amplitude') YW8K $W  
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) < 72s7*Rv  
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axis([0 90 -1 1]) 6C:x6'5[  
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grid on BG
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subplot(1,2,2); j}|N^A_ S  
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plot(theta,tp,'-',theta,ts,'--',theta,abs(tp),':',theta,abs(ts),'-.','LineWidth',2) PoYr:=S?  
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legend('t_p','t_s','|t_p|','|t_s|') _L*f8e8  
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xlabel('\theta_i') W:VW_3  
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ylabel('Amplitude') ojN`#%X  
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) `j"4:  
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axis([0 90 0 1]) Q<RT12|`  
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grid on _wm
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Rp=abs(rp).^2;
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Rs=abs(rs).^2; i'Y-V]->  
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Rn=(Rp+Rs)/2; W:`5nj]H9  
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Tp=1-Rp; jmR
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Ts=1-Rs; 8'3"uv  
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Tn=(Tp+Ts)/2; ow-+>Y[qZ  
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figure(2) (3AYy0J%  
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subplot(1,2,1); x HY+q;  
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plot(theta,Rp,'-',theta,Rs,'--',theta,Rn,':','LineWidth',2) NV&;e[z  
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legend('R_p','R_s','R_n') jVX._bEGX  
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xlabel('\theta_i') Xf6fH O  
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ylabel('Amplitude') 86
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) 6e,Apj 0  
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axis([0 90 0 1]) zs4>/9O  
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grid on qO7fbql_  
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subplot(1,2,2); 0xN!DvCg>.  
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plot(theta,Tp,'-',theta,Ts,'--',theta,Tn,':','LineWidth',2) \'[3^/('  
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legend('T_p','T_s','T_n') Dp^"J85}   
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xlabel('\theta_i') v,n);  
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ylabel('Amplitude')
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%=y;L:S\p  
title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) (viWY  
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axis([0 90 0 1]) hl`u"?rg  
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grid on 6j_ 678  
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2、光密射向光疏 [8.-(-/;  
3+e4e  
clear _FT6]I0  
h 5Hr[E1  
close all l(#1mY5!q8  
KyjyjfIwH  
n1=1.45,n2=1; &m'?*O |  
(nq^\ZdF  
theta=0:0.1:90; jKS!'?  
W8y$Ve8m  
a=theta*pi/180; @' d6iYk_  
\Yd4gaY\o  
rp=(n2*cos(a)-n1*sqrt(1-(n1/n2*sin(a)).^2))./(n2*cos(a)+n1*sqrt(1-(n1/n2*sin(a)).^2)); Nfg{,/O  
JwB"\&'1ZS  
rs=(n1*cos(a)-n2*sqrt(1-(n1/n2*sin(a)).^2))./(n1*cos(a)+n2*sqrt(1-(n1/n2*sin(a)).^2)); d @m\
f  
76_<xUt{  
tp=2*n1*cos(a)./(n2*cos(a)+n1*sqrt(1-(n1/n2*sin(a)).^2)); YKY2Cw  
mf$Sa58  
ts=2*n1*cos(a)./(n1*cos(a)+n2*sqrt(1-(n1/n2*sin(a)).^2)); Oo1ecbY  
g>_OuQ|c  
figure(1) &~'S)Nun  
RtwUb(wn6  
subplot(1,2,1); PYu$1o9+N  
eSn$k:\W  
plot(theta,rp,'-',theta,rs,'--',theta,abs(rp),':',theta,abs(rs),'-.','LineWidth',2) HAd%k$Xu{  
Od-Ax+Hp  
legend('r_p','r_s','|r_p|','|r_s|') fgmSgG"b  
zSKKr?{  
xlabel('\theta_i') JYQ.EAsr!  
>nK%^T  
ylabel('Amplitude') Y[@0qc3UO  
O>%$q8x@i  
title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) 9n"V\e_R  
D#ZPq,f  
axis([0 90 -1.5 1.5]) sBU_Ft  
V9Hl1\j^  
grid on "W5rx8a  
!9D1 Fa  
subplot(1,2,2); SB/3jH  
z0 \N{rP&  
plot(theta,tp,'-',theta,ts,'--',theta,abs(tp),':',theta,abs(ts),'-.','LineWidth',2) I|T7+{
5z  
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legend('t_p','t_s','|t_p|','|t_s|') YQ7@D]#  
V'I T1~  
xlabel('\theta_i') e1UITjy  
*{|$FQnR>(  
ylabel('Amplitude') :v)6gz(p  
[S0mY["  
title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) *gDl~qNRoS  
b
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axis([0 90 -0.5 3]) n]iyFZ`9  
CdL.?^  
grid on @$c!/  
K{2h9 ]VF  
Rp=abs(rp).^2; #x)8f3I  
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Rs=abs(rs).^2; X3yS5whd(  
mX;H((  
Rn=(Rp+Rs)/2; (;ADW+.`J  
n}q$f|4!  
Tp=1-Rp; zN")elBi  
9@'4P  
Ts=1-Rs; TF2KZL#A|  
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Tn=(Tp+Ts)/2; H%z/v|e6  
*)D1!R<\,R  
figure(2) vBoO'l9'M  
T?rH ,$:  
subplot(1,2,1); w.^yP7:  
=$&&[&  
plot(theta,Rp,'-',theta,Rs,'--',theta,Rn,':','LineWidth',2) *|KVN&#  
UP8{5fx'  
legend('R_p','R_s','R_n') bLlH//ZRH  
 :,~K]G  
xlabel('\theta_i') f3#X0.':  
SiTe
B)/  
ylabel('Amplitude') :tbd,Uo  
c1#+Vse  
title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) $>r5>6  
V|: qow:F  
axis([0 90 0 1]) U\bC0q   
vaB!R 0  
grid on RRzP*A%=  
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subplot(1,2,2); 5v|EAjB6o  
MGaiTN^_<  
plot(theta,Tp,'-',theta,Ts,'--',theta,Tn,':','LineWidth',2) u"Y]P*[k  
[.&[<!,.  
legend('T_p','T_s','T_n') "dtlME{Bx  
CXAVGO'xw  
xlabel('\theta_i') ArXl=s';s4  
O{q&]~,  
ylabel('Amplitude') 7 :U8 f:  
zP
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) }-nU3{1  
Ep ">v>"  
axis([0 90 0 1]) X-/Ban  
_ECB^s_  
grid on doLNz4W  
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这个在《MATLAB在光学中的应用》这本书里都有

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