[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 3P^sM1  
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1、光疏射向光密 *22nVKi{  
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clear fi$-;Gz  
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close all }A7j/uy}s  
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n1=1,n2=1.45; EodQ*{l  
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theta=0:0.1:90; i-6F:\;  
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a=theta*pi/180; b7wvaRe.  
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rp=(n2*cos(a)-n1*sqrt(1-(n1/n2*sin(a)).^2))./(n2*cos(a)+n1*sqrt(1-(n1/n2*sin(a)).^2)); %Cv D-![0  
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rs=(n1*cos(a)-n2*sqrt(1-(n1/n2*sin(a)).^2))./(n1*cos(a)+n2*sqrt(1-(n1/n2*sin(a)).^2)); 8=Z9T<K  
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tp=2*n1*cos(a)./(n2*cos(a)+n1*sqrt(1-(n1/n2*sin(a)).^2)); Ko&>C_N  
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ts=2*n1*cos(a)./(n1*cos(a)+n2*sqrt(1-(n1/n2*sin(a)).^2)); 'zGo?a  
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figure(1) #[`:'e  
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subplot(1,2,1); "0cID3A$  
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plot(theta,rp,'-',theta,rs,'--',theta,abs(rp),':',theta,abs(rs),'-.','LineWidth',2) |]ZYa.+:  
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legend('r_p','r_s','|r_p|','|r_s|') 2VJR$Pao  
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xlabel('\theta_i') 1PP $XJtyD  
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ylabel('Amplitude') W>p-u6u%E|  
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) (C@~3!AVa  
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axis([0 90 -1 1]) t{WzKy  
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grid on FZtfh  
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subplot(1,2,2); CCWg{*og  
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plot(theta,tp,'-',theta,ts,'--',theta,abs(tp),':',theta,abs(ts),'-.','LineWidth',2) K?zH35f$  
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legend('t_p','t_s','|t_p|','|t_s|') $a"n1ou  

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xlabel('\theta_i') f'aVV!  
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ylabel('Amplitude') HOE_S!N  
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) *EZHJt9  
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axis([0 90 0 1]) Ie`13 L2  
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grid on yLdVd P  
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Rp=abs(rp).^2; 0;:.B j  
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Rs=abs(rs).^2; [-;_ZFS{  
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Rn=(Rp+Rs)/2; IS#FiH  
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Tp=1-Rp; bV$)!]V  
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Ts=1-Rs; Y))u&*RuT0  
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Tn=(Tp+Ts)/2; OZTPOz.  
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figure(2) 5c^Z/ Jl$c  
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subplot(1,2,1); hDcEGU_  
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plot(theta,Rp,'-',theta,Rs,'--',theta,Rn,':','LineWidth',2) )6Ny1x+  
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legend('R_p','R_s','R_n') { Q`QX`#  
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xlabel('\theta_i')  mi)LP?q  
'6xQT-sUih  
ylabel('Amplitude') C_n9T{k  
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) 3'c0#h@VD  
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axis([0 90 0 1]) KA){''>8  
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grid on HKqwE=NZ  

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subplot(1,2,2); @W^| ?  
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plot(theta,Tp,'-',theta,Ts,'--',theta,Tn,':','LineWidth',2) hlJq-*6'  
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legend('T_p','T_s','T_n') +H9>A0JF  
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xlabel('\theta_i') eOXHQjuj  
T.We: ,{  
ylabel('Amplitude') l411a9o  
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) *+\SyO  
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axis([0 90 0 1]) gx&Tt  
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grid on {.De4]ANh  
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2、光密射向光疏 >A<bBK#  
xritonG/F  
clear ^RP)>d9Xp{  
A5H3%o(6k  
close all h?f>X"*|(  
svuq gSn  
n1=1.45,n2=1; Pf_S[ sm  
$ KRI'4  
theta=0:0.1:90; h^*4}GU  
}4{fQ`HT  
a=theta*pi/180; S_T1y  
V~hlq$jn<Y  
rp=(n2*cos(a)-n1*sqrt(1-(n1/n2*sin(a)).^2))./(n2*cos(a)+n1*sqrt(1-(n1/n2*sin(a)).^2));  (:";i&  
s-RQMK}H  
rs=(n1*cos(a)-n2*sqrt(1-(n1/n2*sin(a)).^2))./(n1*cos(a)+n2*sqrt(1-(n1/n2*sin(a)).^2)); fnNYX]_bk  
m1IKVa7-\}  
tp=2*n1*cos(a)./(n2*cos(a)+n1*sqrt(1-(n1/n2*sin(a)).^2)); u@.>Z{h  
k~/>b~.c  
ts=2*n1*cos(a)./(n1*cos(a)+n2*sqrt(1-(n1/n2*sin(a)).^2)); E^rbcGJ  
UTSL  
figure(1) dTL5-@  
sU!6hk  
subplot(1,2,1); eh,~F  
NO0"*c;  
plot(theta,rp,'-',theta,rs,'--',theta,abs(rp),':',theta,abs(rs),'-.','LineWidth',2) Z{ u a=0  
tU^kQR!  
legend('r_p','r_s','|r_p|','|r_s|') M#4QQ} F.  
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xlabel('\theta_i') =fYL}m5E  
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ylabel('Amplitude') u1~9{"P*  
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) -PnyZ2'Z  
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axis([0 90 -1.5 1.5]) $Y9jrR'w  
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grid on LT~YFS  
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subplot(1,2,2); nZ_v/?O  
0}:2Q#  
plot(theta,tp,'-',theta,ts,'--',theta,abs(tp),':',theta,abs(ts),'-.','LineWidth',2) ZKz,|+X0G  
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legend('t_p','t_s','|t_p|','|t_s|') [<,~3oRu  
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xlabel('\theta_i') 6MG9a>=  
qTB$`f'|$  
ylabel('Amplitude') >;#=gM  
jr /lk  
title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) H Y ynMP  
T?p`)  
axis([0 90 -0.5 3]) X>I)~z}9#  
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grid on W{5:'9,  
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-  
Rp=abs(rp).^2; yfDAk46->6  
68iV/7  
Rs=abs(rs).^2; ]O` {dnP  
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Rn=(Rp+Rs)/2; {u\%hpD_  
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Tp=1-Rp; PU {uE[  
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Ts=1-Rs; '>k{tPi.  
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Tn=(Tp+Ts)/2; ya -i^i\  
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figure(2) !>(RK"KWq]  
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subplot(1,2,1); O3N_\B:  
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plot(theta,Rp,'-',theta,Rs,'--',theta,Rn,':','LineWidth',2) >az;!7~cD  
;XC@=RpX  
legend('R_p','R_s','R_n') ` r']^ ,  
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xlabel('\theta_i') MqKye8h9f  
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ylabel('Amplitude') q+a.G2S  
kLS(w??T  
title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) e#/kNHl  
_}mK!_`  
axis([0 90 0 1]) nW+YOX|+  
XjE>k!=I  
grid on j}+5vB|0  
jko"MfJ  
subplot(1,2,2); cE{ =(OQ  
6`$[Ini  
plot(theta,Tp,'-',theta,Ts,'--',theta,Tn,':','LineWidth',2) (shK  
&s)0z)mR8&  
legend('T_p','T_s','T_n') \Xt)E[  
[B0K  
xlabel('\theta_i') 15zrrU~D  
!RlC~^ -  
ylabel('Amplitude') uO >x:*^8  
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) On1v<SD$[  
0m+8P$)C%  
axis([0 90 0 1]) D6Y6^eS-  
hxC!+ArVe  
grid on qUf)j\7"Fn  
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OK`Z@X_,bW  

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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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