[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 ;2kQ)Bq"  
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1、光疏射向光密 I{$suPk  
v/ry" W  
clear K\-N'M!Z  
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close all "W5MZ  
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n1=1,n2=1.45; =o(}=T>:"  
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theta=0:0.1:90; QbdXt%gZe  
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a=theta*pi/180; 'pA%lc)  
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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)); j"jssbu}  
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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)); e,OXngC  
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tp=2*n1*cos(a)./(n2*cos(a)+n1*sqrt(1-(n1/n2*sin(a)).^2)); $@VJ@JAe  
OXLB{|hH80  
ts=2*n1*cos(a)./(n1*cos(a)+n2*sqrt(1-(n1/n2*sin(a)).^2)); /[6wm1?!  
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figure(1) @6ckB (  
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subplot(1,2,1); HP*)^`6X  
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plot(theta,rp,'-',theta,rs,'--',theta,abs(rp),':',theta,abs(rs),'-.','LineWidth',2) .EhC\QpP  
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legend('r_p','r_s','|r_p|','|r_s|') (l
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xlabel('\theta_i') (U5XB [r_P  
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ylabel('Amplitude') $idToOkw  
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) p cD}SY
 
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axis([0 90 -1 1]) igOX0  
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grid on B)/&xQu  
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subplot(1,2,2); ${Lrj}93  
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plot(theta,tp,'-',theta,ts,'--',theta,abs(tp),':',theta,abs(ts),'-.','LineWidth',2) Fz8& Jn!  
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legend('t_p','t_s','|t_p|','|t_s|') ->|eMV'd  
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xlabel('\theta_i') tDAX pi(  
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ylabel('Amplitude') pe[huYE  
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) V,ZRX}O  
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axis([0 90 0 1]) 4-O.i\1q  
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grid on :SF
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U;&s=M0[  
Rp=abs(rp).^2; (O ;R~Io  
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Rs=abs(rs).^2; ,9|7{j|u  
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Rn=(Rp+Rs)/2; QdZHIgh`i  
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Tp=1-Rp; [9EL[}  
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Ts=1-Rs; o)\EfPT  
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Tn=(Tp+Ts)/2; g3n>}\xG>  
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figure(2) 3rh t5n2-  
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subplot(1,2,1); t2ui9:g4j  
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plot(theta,Rp,'-',theta,Rs,'--',theta,Rn,':','LineWidth',2) T
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legend('R_p','R_s','R_n') $v{sb,  
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xlabel('\theta_i') #I yM`YB0  
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ylabel('Amplitude') O6-"q+H)  
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) UL8"{-`_\  
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axis([0 90 0 1]) d#,   
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grid on %'F[(VB  
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subplot(1,2,2); +/*A}!#v  
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plot(theta,Tp,'-',theta,Ts,'--',theta,Tn,':','LineWidth',2) bir tA{q  
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legend('T_p','T_s','T_n') >m9ge`!9  
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xlabel('\theta_i') nRZ T~S4  
Wm58[;%LTw  
ylabel('Amplitude') [aC2ktI  
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) \4q1<j  
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axis([0 90 0 1]) Jxb+NPUB  
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grid on [VB\T|$  
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2、光密射向光疏 \.dvRI'  
A=k{Rl{LA  
clear ?G!DYUK  
:-.bXOB(  
close all Co>=<\yi  
Ih0kdi  
n1=1.45,n2=1; Ik|nL#JH]  
D7x"P-ie  
theta=0:0.1:90; Q|o~\h<  
{*PB+WGe  
a=theta*pi/180; 3+jqf@fO  
S(*SUH  
rp=(n2*cos(a)-n1*sqrt(1-(n1/n2*sin(a)).^2))./(n2*cos(a)+n1*sqrt(1-(n1/n2*sin(a)).^2)); J4ltHk.|  
/e}NZo{)g  
rs=(n1*cos(a)-n2*sqrt(1-(n1/n2*sin(a)).^2))./(n1*cos(a)+n2*sqrt(1-(n1/n2*sin(a)).^2)); o;@T6-VH  
@(A[H^E  
tp=2*n1*cos(a)./(n2*cos(a)+n1*sqrt(1-(n1/n2*sin(a)).^2)); `=3:*.T*  
',p`B-dw  
ts=2*n1*cos(a)./(n1*cos(a)+n2*sqrt(1-(n1/n2*sin(a)).^2)); A|d(5{:N  
ON=6w_  
figure(1) FCEFg)c5=  
=sW(2Im  
subplot(1,2,1); wGf SVA-q\  
vN%SN>=L<  
plot(theta,rp,'-',theta,rs,'--',theta,abs(rp),':',theta,abs(rs),'-.','LineWidth',2) mMvt#+O  
4`7:gfrO,  
legend('r_p','r_s','|r_p|','|r_s|') /uzU]3KF~  
Wf=D'6w  
xlabel('\theta_i') G u-#wv5@  
/_P5UE(  
ylabel('Amplitude') I vQ]-A}N  
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) y
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axis([0 90 -1.5 1.5]) 3R[5prE<  
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grid on >\ :kP>U  
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subplot(1,2,2); Ln})\ UDK)  
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plot(theta,tp,'-',theta,ts,'--',theta,abs(tp),':',theta,abs(ts),'-.','LineWidth',2) vo[Zuv?<h  
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legend('t_p','t_s','|t_p|','|t_s|') /K"koV;  
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xlabel('\theta_i') C0X_t  
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ylabel('Amplitude') V\"x
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) ,tZWPF-  
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axis([0 90 -0.5 3]) ;_GS<[A3  
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grid on "Fu*F/KW  
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Rp=abs(rp).^2; DDT)l+:XP  
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Rs=abs(rs).^2; 8-c1q*q)  
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Rn=(Rp+Rs)/2; I_
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Tp=1-Rp; POQRq%w  
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Ts=1-Rs; aCe<*;b@  
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Tn=(Tp+Ts)/2; T<"Hh.h  
#=@( m.k:s  
figure(2) @54D<Lj  
`g&<7~\=A  
subplot(1,2,1); A=/|f$s+  
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plot(theta,Rp,'-',theta,Rs,'--',theta,Rn,':','LineWidth',2)
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legend('R_p','R_s','R_n') B(x i  
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xlabel('\theta_i') xioL6^(Qk,  
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ylabel('Amplitude') j()<.h;'  
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) 9pD=E>4?#  
445}Yw5;9  
axis([0 90 0 1]) FWv-_  
 &y/  
grid on 4i>sOP3 B  
x'OE},>i  
subplot(1,2,2); FOxMt;|M  
L,L>cmpM  
plot(theta,Tp,'-',theta,Ts,'--',theta,Tn,':','LineWidth',2) !fXwX3B  
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legend('T_p','T_s','T_n') #;?j]npg]  
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xlabel('\theta_i') w~A{]s{4  
mrR~[533j  
ylabel('Amplitude') Mvq5s+.  
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) (5y+g?9d;  
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axis([0 90 0 1]) -z9-f\  
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grid on vs-%J6}G  
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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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