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
"'p +qbT8 ~ dI&> CL 1、光疏射向光密
odT7Gq \kJt@ [w% clear
Z?j= '/u>@ D 5wR?O close all
m^u&g&^ {p_vR/ yN n1=1,n2=1.45;
QIz N# ;g Gy Xs{* theta=0:0.1:90;
JU,RO oz( '; T5[l, a=theta*pi/180;
e. Q K% qYiK bzy rp=(n2*cos(a)-n1*sqrt(1-(n1/n2*sin(a)).^2))./(n2*cos(a)+n1*sqrt(1-(n1/n2*sin(a)).^2));
`h{mj|~ u|*| RuY rs=(n1*cos(a)-n2*sqrt(1-(n1/n2*sin(a)).^2))./(n1*cos(a)+n2*sqrt(1-(n1/n2*sin(a)).^2));
$j2)_(<A%Q H5MAN,` tp=2*n1*cos(a)./(n2*cos(a)+n1*sqrt(1-(n1/n2*sin(a)).^2));
=
(h ;L$ 6)2M/( ts=2*n1*cos(a)./(n1*cos(a)+n2*sqrt(1-(n1/n2*sin(a)).^2));
nX aX= bFx J| figure(1)
{gHscj;SM zZ0V6T} subplot(1,2,1);
)0V]G{QN 4bjp*1 *] plot(theta,rp,'-',theta,rs,'--',theta,abs(rp),':',theta,abs(rs),'-.','LineWidth',2)
yzzre>F Uht:wEr legend('r_p','r_s','|r_p|','|r_s|')
$P9$ ,w4 ~g6[ [ xlabel('\theta_i')
V>j` :q[n1
O[Ch ylabel('Amplitude')
8VGXw;(Y,d NGZ > : title(['n_1=',num2str(n1),',n_2=',num2str(n2)])
(G!J== bjX$idL axis([0 90 -1 1])
_rh.z_a7w t|"d#5' grid on
=C2C~Xd T>o# *{q n subplot(1,2,2);
t[oc p;Q 9f [[%80 plot(theta,tp,'-',theta,ts,'--',theta,abs(tp),':',theta,abs(ts),'-.','LineWidth',2)
9+|,aG s Q*{
2 legend('t_p','t_s','|t_p|','|t_s|')
`g1~ya(MC f^)nZ:~ xlabel('\theta_i')
Ci:QIsu* <xNM@!'\h ylabel('Amplitude')
NistW+{< pD/S\E0@t title(['n_1=',num2str(n1),',n_2=',num2str(n2)])
->{WO+6( t!C-G+It axis([0 90 0 1])
bcs(# yln.E vJjD grid on
8R D)yRJ DZZt%n8J Rp=abs(rp).^2;
:UciFIa ri`|qy6! | Rs=abs(rs).^2;
>f/g:[ (k45k/PAP Rn=(Rp+Rs)/2;
-lEh}r $sJfxh
r Tp=1-Rp;
/Qy0vA vJ + k:?;ZG Ts=1-Rs;
X2Mj|_#u .ji%%f Tn=(Tp+Ts)/2;
`6su_8Hno =G6@:h= figure(2)
/+YWp>6LU IuD<lMeJ J subplot(1,2,1);
*ni|I@ 8 39#>C~BOl plot(theta,Rp,'-',theta,Rs,'--',theta,Rn,':','LineWidth',2)
eH6cBX#P. {w ySH[V legend('R_p','R_s','R_n')
, 88}5)b[ ipG+qj/= xlabel('\theta_i')
g> f394j /FY_LM ylabel('Amplitude')
wC~Uy% M*%Z5,Tc title(['n_1=',num2str(n1),',n_2=',num2str(n2)])
pm+[,u!i Y !zlte|P axis([0 90 0 1])
Zlhr0itf }J1#UH_E grid on
>b0}X)Z+U &CgD smJo# subplot(1,2,2);
cqDnZ`|6 #%~wuCn<K plot(theta,Tp,'-',theta,Ts,'--',theta,Tn,':','LineWidth',2)
K 9c:K/H }tN"C 3)@ legend('T_p','T_s','T_n')
&LE/hA TD'1L:mv xlabel('\theta_i')
C' Q} Z_ }/=_ ylabel('Amplitude')
HzV3O-Qz] U<$ |ET' title(['n_1=',num2str(n1),',n_2=',num2str(n2)])
gwyz)CUkL pnWDsC ~) axis([0 90 0 1])
"b qB@) NeYj[Q~xy grid on
) 9s[-W,e kjH0u$n 
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