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
Uc4 L|: l]kl V+9t 1、光疏射向光密
TLL[F;uZ 9snyX7/!L clear
J%O4IcE LN3dp?;_{ close all
NV:XPw/ o YI=p3l n1=1,n2=1.45;
s*~jvL 9bcyPN theta=0:0.1:90;
Hb AMoow! M_.,c Vk a=theta*pi/180;
DneSzq O"o b=QGbFf rp=(n2*cos(a)-n1*sqrt(1-(n1/n2*sin(a)).^2))./(n2*cos(a)+n1*sqrt(1-(n1/n2*sin(a)).^2));
2}#wd J` KutgW#+40 rs=(n1*cos(a)-n2*sqrt(1-(n1/n2*sin(a)).^2))./(n1*cos(a)+n2*sqrt(1-(n1/n2*sin(a)).^2));
3_eml\CY []N$;~R7 tp=2*n1*cos(a)./(n2*cos(a)+n1*sqrt(1-(n1/n2*sin(a)).^2));
`@.s!L(V *ZSp9g"Z ts=2*n1*cos(a)./(n1*cos(a)+n2*sqrt(1-(n1/n2*sin(a)).^2));
C=_-p"O# sr($Bw figure(1)
w KMk|y> vyx\N{ subplot(1,2,1);
53+rpU_ ]E8 <;t)# plot(theta,rp,'-',theta,rs,'--',theta,abs(rp),':',theta,abs(rs),'-.','LineWidth',2)
qpwh #^ 2 acju!,G legend('r_p','r_s','|r_p|','|r_s|')
IweK!,:>dN Q3O . <9S xlabel('\theta_i')
SnF[mN' 674oL, ylabel('Amplitude')
ch8w' 0|> title(['n_1=',num2str(n1),',n_2=',num2str(n2)])
Dx# @D# 3;l>x/amk axis([0 90 -1 1])
_} 9R} 6ewOZ,"j"4 grid on
ZM^;%( ^FMa8;'o subplot(1,2,2);
n
ua8y(W 56
kgL;$h plot(theta,tp,'-',theta,ts,'--',theta,abs(tp),':',theta,abs(ts),'-.','LineWidth',2)
e%c5 OZ3~ ~$ qJw?r
legend('t_p','t_s','|t_p|','|t_s|')
N[bf.5T -r'seb5 xlabel('\theta_i')
f]A6Mx6 XM@i|AK
M0 ylabel('Amplitude')
2GKU9cV*` # bZ=R title(['n_1=',num2str(n1),',n_2=',num2str(n2)])
&b6@_ C9 xv% USm axis([0 90 0 1])
u`Qcw|R+ wfTv<WG,.E grid on
'=5_u tP(bRQ> Rp=abs(rp).^2;
Fx:e n|g p}zk&` Rs=abs(rs).^2;
-Fc# "Xs Y~ Rn=(Rp+Rs)/2;
%+B-Z/1} 6')SJ*|yS Tp=1-Rp;
O*/-I
pM z==} ~|5 Ts=1-Rs;
cB F%])! Wk6&TrWlY Tn=(Tp+Ts)/2;
x&/Syb +Y]*>afG figure(2)
V;]V wsZ" e27CbA{_w subplot(1,2,1);
uvv-lAbjw C^=gZ
6m plot(theta,Rp,'-',theta,Rs,'--',theta,Rn,':','LineWidth',2)
skx=w<YO6] -X Ivj'u legend('R_p','R_s','R_n')
~)IJE+e>} rkc%S5 we xlabel('\theta_i')
~ I|R}hS u W tS83i ylabel('Amplitude')
V+~{a:8[pq e.ym7L]$O title(['n_1=',num2str(n1),',n_2=',num2str(n2)])
KP -z Bo\v-97 axis([0 90 0 1])
U105u.#7 [ Q_| 6Di grid on
EjE`S_i= 5f@YrTO[@ subplot(1,2,2);
4m!3P"$ H08YM P>dc plot(theta,Tp,'-',theta,Ts,'--',theta,Tn,':','LineWidth',2)
;p!hd }C 1gej$G@ legend('T_p','T_s','T_n')
> t2)Z|1 mf[79:90^ xlabel('\theta_i')
/_\W*@ E uOqDJM'RM ylabel('Amplitude')
j =% -b] C\@Y H] title(['n_1=',num2str(n1),',n_2=',num2str(n2)])
}M@Jrq+7 aMg f6veM axis([0 90 0 1])
Mf13@XEo ! r GI), grid on
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