计算光波由光密入射到光疏介质时相位变化
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] / Nt >)C7IQ / n1=1.45,n2=1;
'.z7 )n %XN;S29d5W theta=0:0.1:90;
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dT [;IE Z/ZX a=theta*pi/180;
# tA9`! @!oN]0`F; rp=(n2*cos(a)-n1*sqrt(1-(n1/n2*sin(a)).^2))./(n2*cos(a)+n1*sqrt(1-(n1/n2*sin(a)).^2));
`XE>Td>Bs D+;4|7s+ rs=(n1*cos(a)-n2*sqrt(1-(n1/n2*sin(a)).^2))./(n1*cos(a)+n2*sqrt(1-(n1/n2*sin(a)).^2));
\?t8[N\_[( G{6@] 72 tp=2*n1*cos(a)./(n2*cos(a)+n1*sqrt(1-(n1/n2*sin(a)).^2));
wxcJ2T d H mK $E&,OkA ts=2*n1*cos(a)./(n1*cos(a)+n2*sqrt(1-(n1/n2*sin(a)).^2));
i/-IjgM"- Uv[a
~ ' arp=angle(rp);
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_ap T<P @C@9Tw2Y ars=angle(rs);
p@~Y [a = g7?[}?]3"p atp=angle(tp);
N KgEs (*r2bm2FPO ats=angle(ts);
2~/`L=L Z*w({k7] figure(1)
]v B^% Dti-*LB1 subplot(1,2,1);
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N7I:vJ 'fK=;mM plot(theta,arp,'-',theta,ars,'--','LineWidth',2)
p_BG#d RM Ht+ro Y legend('arg(r_p)','arg(r_s)')
?;](;n#lU u q 9mq" xlabel('\theta_i')
!NNPg ?Y 0^Ldw)C" ylabel('\phi')
i#YDdz ;DX{+Z[ title(['n_1=',num2str(n1),',n_2=',num2str(n2)])
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axis([0 90 -3.5 3.5])
Ay6T*Nu` z^gz kXx7 grid on
z5({A2q b/*QV0( subplot(1,2,2);
An(gHi;1$ FEhBhv|m plot(theta,atp,'-',theta,ats,'--','LineWidth',2)
o7+<sL 1f^oW[w& legend('arg(t_p)','arg(t_s)')
zx "EAF{ hU( xlabel('\theta_i')
0e"KdsA:<U =3hJti9[ ylabel('\phi')
?~.9: 93 1 c"s+k]9 title(['n_1=',num2str(n1),',n_2=',num2str(n2)])
Bz ,D4 E$ Us "G X_ axis([0 90 -3.5 3.5])
@ .cord` A<H]uQ> grid on
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