[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 QI*<MF,1  
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1、光疏射向光密 j-TRa,4bN  
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clear oxXCf%!  
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close all (qdvvu#E  
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n1=1,n2=1.45; 5Sx.'o$  
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theta=0:0.1:90; MkX=34oc^  
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a=theta*pi/180; M*2 Nq=3  
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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)); /MZ^;XG  
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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)); "WZ|  
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tp=2*n1*cos(a)./(n2*cos(a)+n1*sqrt(1-(n1/n2*sin(a)).^2)); !q5qA*  
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ts=2*n1*cos(a)./(n1*cos(a)+n2*sqrt(1-(n1/n2*sin(a)).^2)); z4{:X Da  
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figure(1) ]8CgHT[^7  
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subplot(1,2,1); AA<QI'6  
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plot(theta,rp,'-',theta,rs,'--',theta,abs(rp),':',theta,abs(rs),'-.','LineWidth',2) D`3`5.b  
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legend('r_p','r_s','|r_p|','|r_s|') ?}"39n  
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xlabel('\theta_i') M.\V/OX  
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ylabel('Amplitude') ZaF9Q%  
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) 45;ey }8  
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axis([0 90 -1 1]) b)@rp  
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grid on .zv BV_I  
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subplot(1,2,2); pv]" 2'aQ  
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plot(theta,tp,'-',theta,ts,'--',theta,abs(tp),':',theta,abs(ts),'-.','LineWidth',2) (nAL;:$x2  
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legend('t_p','t_s','|t_p|','|t_s|') iTVZo?lVo  
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xlabel('\theta_i') iF Zqoz  
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ylabel('Amplitude') F}?4h Dt  
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) `T{'ufI4B  
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axis([0 90 0 1]) iFnD`l6)  
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grid on >:HmIW0PLe  
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Rp=abs(rp).^2; Ll.P>LH  
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Rs=abs(rs).^2; 
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Rn=(Rp+Rs)/2; (AZAQ xt  
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Tp=1-Rp; rn/~W[  
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Ts=1-Rs; 6V*,nocL_+  
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Tn=(Tp+Ts)/2; ~LQzt@G4  
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figure(2) DTG-R>y^  
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subplot(1,2,1); 51Vqbtj^  
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plot(theta,Rp,'-',theta,Rs,'--',theta,Rn,':','LineWidth',2) y%?'<j  
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legend('R_p','R_s','R_n') eph2&)D}Ep  
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xlabel('\theta_i') fUr%@&~l^  
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ylabel('Amplitude') qw1W}+~g  
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) '$),i>6gJ  
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axis([0 90 0 1]) )ZI#F]  
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grid on Vl;zd=  
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subplot(1,2,2);
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plot(theta,Tp,'-',theta,Ts,'--',theta,Tn,':','LineWidth',2) *V4%&&{  
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legend('T_p','T_s','T_n') 4EmdQn  
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xlabel('\theta_i') g9fYt&  
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ylabel('Amplitude') (T%?@'\  
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) s1h
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axis([0 90 0 1]) d%.|MAE  
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grid on TW!OE"B  
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2、光密射向光疏
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clear FR[I~unqD  
bm 4RR
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close all T[)!7@4r  
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n1=1.45,n2=1; mvK^')  
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theta=0:0.1:90; q)L4*O  
-fk;Qq3O  
a=theta*pi/180; ge1. HG  
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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)); bXvO+I<  
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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)); `WN80d\)&  
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tp=2*n1*cos(a)./(n2*cos(a)+n1*sqrt(1-(n1/n2*sin(a)).^2)); :ujpLIjvVG  
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ts=2*n1*cos(a)./(n1*cos(a)+n2*sqrt(1-(n1/n2*sin(a)).^2)); IycZ\^5*-  
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figure(1) @;`'s  
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subplot(1,2,1); .Y{x!Q"  
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plot(theta,rp,'-',theta,rs,'--',theta,abs(rp),':',theta,abs(rs),'-.','LineWidth',2) EW(bM^dk}  
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legend('r_p','r_s','|r_p|','|r_s|') !#_2 ![  
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xlabel('\theta_i') 0t%]z!  
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ylabel('Amplitude') e)n ,Y  
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) n 5R9<A^  
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axis([0 90 -1.5 1.5]) %]&$VVVh  
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grid on I2WP/  
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subplot(1,2,2); U,#x\[3!Jt  
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plot(theta,tp,'-',theta,ts,'--',theta,abs(tp),':',theta,abs(ts),'-.','LineWidth',2) (&Rk#iU 2  
tngB;9c+w  
legend('t_p','t_s','|t_p|','|t_s|') ~q}L13^k  
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xlabel('\theta_i') sFz0:SqhE  
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ylabel('Amplitude') e O\72? K  
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) 88v8lt;R  
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axis([0 90 -0.5 3]) }+n|0xK  
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grid on 1#6emMV.`  
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Rp=abs(rp).^2; Pgr2S I  
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Rs=abs(rs).^2; I?}jf?!oM  
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Rn=(Rp+Rs)/2; GNMOHqg4  
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Tp=1-Rp; i`2SebDj'w  
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Ts=1-Rs; +Pb:<WT}%  
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Tn=(Tp+Ts)/2; HK/WO jr  
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figure(2) 'c7nh{F  
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subplot(1,2,1); [[IMf-]  
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plot(theta,Rp,'-',theta,Rs,'--',theta,Rn,':','LineWidth',2) F)hj\aHm k  
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legend('R_p','R_s','R_n') ]qT&6:;-]  
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xlabel('\theta_i') A+RW=|:  
r)5xS]  
ylabel('Amplitude') 4tZ*%!I'  
adP :{j  
title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) UA8hYWRP  
Mqd'XU0L  
axis([0 90 0 1]) 60!%^O =  
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grid on HJAiQ[m5s  
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subplot(1,2,2); fQa*>**j;  
WT ;2aS:  
plot(theta,Tp,'-',theta,Ts,'--',theta,Tn,':','LineWidth',2) %, psUOY  
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legend('T_p','T_s','T_n') MT&aH~YB  
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xlabel('\theta_i') T ?[28|  
rQimQ|+  
ylabel('Amplitude') fwz:k]vk  
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) &!CVF  
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axis([0 90 0 1]) 9S|sTf  
TF/NA\0c$  
grid on O%T?+1E  
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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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