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 O _yJR R44JK 1、光疏射向光密 QKL5!
L9` YC - -&66 clear Sir7TQ4B ?5K.#>{ close all =O?<WJoK x|<rt966A n1=1,n2=1.45; KV k
36;$ 0t*JP theta=0:0.1:90; "[L[*>[9! ,DqI> vx| a=theta*pi/180; 68V66:0 T;w%-k\<r rp=(n2*cos(a)-n1*sqrt(1-(n1/n2*sin(a)).^2))./(n2*cos(a)+n1*sqrt(1-(n1/n2*sin(a)).^2)); _}:9ic]e /k|y \'< rs=(n1*cos(a)-n2*sqrt(1-(n1/n2*sin(a)).^2))./(n1*cos(a)+n2*sqrt(1-(n1/n2*sin(a)).^2)); kLU$8L x$QOOE] tp=2*n1*cos(a)./(n2*cos(a)+n1*sqrt(1-(n1/n2*sin(a)).^2)); ? ;i O j+\I4oFN ts=2*n1*cos(a)./(n1*cos(a)+n2*sqrt(1-(n1/n2*sin(a)).^2)); PaP47>( 1/c7((]7(, figure(1) K{B[(]( poGF subplot(1,2,1); -^=gQ7f9 d&&^_0O plot(theta,rp,'-',theta,rs,'--',theta,abs(rp),':',theta,abs(rs),'-.','LineWidth',2) 6AKH0t|4 *F1!=:&s legend('r_p','r_s','|r_p|','|r_s|') (s4w0z zGHP{a1O7 xlabel('\theta_i') EpB2?XGA v~[=|_{ ylabel('Amplitude') x[U/
8#f& f;!1=/5u- title(['n_1=',num2str(n1),',n_2=',num2str(n2)])
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S /)ps_gM axis([0 90 -1 1]) ~Os"dAgZFY xgn@1.}G grid on a FjcyD 1Y6<i8 subplot(1,2,2); |&`NB| \-a^8{.^E plot(theta,tp,'-',theta,ts,'--',theta,abs(tp),':',theta,abs(ts),'-.','LineWidth',2) vz#VW N%v}$58Z legend('t_p','t_s','|t_p|','|t_s|') f]L`^WU
=o^oMn xlabel('\theta_i') |&eZ[Sy(=l L}UJ`U ylabel('Amplitude') 57k@]3
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;)s$Et% title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) [tGAo/ HhDiGzOSi axis([0 90 0 1]) +kP)T(6 e`
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, grid on }u:@:}8K j9)P3=s Rp=abs(rp).^2; ,V'+16xW fw$/@31AP? Rs=abs(rs).^2; ,l^; ZE xy)Y)yp Rn=(Rp+Rs)/2; Yf:xM>.% kW0|\ Tp=1-Rp; 92!1I$zi $"1Unu&P Ts=1-Rs; /yPFts_q [[2Zcz: Tn=(Tp+Ts)/2; 9g3e( z@ !
7A _UA8 figure(2) 649{\;*4 OFJ49X subplot(1,2,1); xS?[v&"2 j hf%ze plot(theta,Rp,'-',theta,Rs,'--',theta,Rn,':','LineWidth',2) /?uA{/8 rOQ@(aUAZ legend('R_p','R_s','R_n') >Eg/ir0 c]LE9<G xlabel('\theta_i') :tU&d(8 #=C!Xx& ylabel('Amplitude') &?UIe] l/0"'o_0v# title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) q}P< Ejq} lx_jy>$}r axis([0 90 0 1]) kx&Xk0F_g )d5Hv2/0 grid on lVF}G[B C^9G \s' subplot(1,2,2); 2f>G ]S;^QZ plot(theta,Tp,'-',theta,Ts,'--',theta,Tn,':','LineWidth',2) h&@A'om~ LA &W@ legend('T_p','T_s','T_n') Lc 4\i .<&o, D xlabel('\theta_i') gZ
vX~ q2 K@i*s ylabel('Amplitude') JrlDTNJj' 7i^7sT8t title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) Ua0fs|t1v [ u7p:?WDW axis([0 90 0 1]) Wy1#K)LRb _~~:@fy grid on v0uDL7 _+Tq&,_:o [attachment=80479] KglL@V7 1./uJB/ [attachment=80478] Su.imM!
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