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 ;2kQ)Bq"
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clear K\-N'M!Z
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close all "W5MZ
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n1=1,n2=1.45; =o(}=T>:"
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theta=0:0.1:90; QbdXt%gZe
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a=theta*pi/180; 'pA%lc)
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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)); j"jssbu}
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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)); e,OXn gC
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tp=2*n1*cos(a)./(n2*cos(a)+n1*sqrt(1-(n1/n2*sin(a)).^2)); $@VJ@JAe
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ts=2*n1*cos(a)./(n1*cos(a)+n2*sqrt(1-(n1/n2*sin(a)).^2)); /[6wm1?!
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figure(1) @6ckB (
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subplot(1,2,1); HP*)^`6X
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plot(theta,rp,'-',theta,rs,'--',theta,abs(rp),':',theta,abs(rs),'-.','LineWidth',2) .EhC\QpP
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legend('r_p','r_s','|r_p|','|r_s|') (lwV(M
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xlabel('\theta_i') (U5XB
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ylabel('Amplitude') $idToOkw
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) p cD}SY
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axis([0 90 -1 1]) igOX 0
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grid on B)/&xQu
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subplot(1,2,2); ${Lrj}93
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plot(theta,tp,'-',theta,ts,'--',theta,abs(tp),':',theta,abs(ts),'-.','LineWidth',2) Fz8& Jn!
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legend('t_p','t_s','|t_p|','|t_s|') ->|eMV'd
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xlabel('\theta_i') tDAX
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ylabel('Amplitude') pe[huYE
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) V,ZRX}O
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axis([0 90 0 1]) 4-O.i\1q
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grid on :SFf}
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Rp=abs(rp).^2; (O ;R~Io
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Rs=abs(rs).^2; ,9|7{j|u
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Rn=(Rp+Rs)/2; QdZHIgh`i
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Tp=1-Rp; [9EL[}
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Ts=1-Rs; o)\EfPT
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Tn=(Tp+Ts)/2; g3n>}\xG>
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figure(2) 3rh t5n2-
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subplot(1,2,1); t2ui9:g4j
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plot(theta,Rp,'-',theta,Rs,'--',theta,Rn,':','LineWidth',2) TFc/`
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legend('R_p','R_s','R_n')
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xlabel('\theta_i') #I yM`YB0
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ylabel('Amplitude') O6-"q+H)
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) UL8"{-`_\
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axis([0 90 0 1]) d#,
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grid on %'F[(VB
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subplot(1,2,2); +/*A}!#v
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plot(theta,Tp,'-',theta,Ts,'--',theta,Tn,':','LineWidth',2) bir tA{q
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legend('T_p','T_s','T_n') >m9ge`!9
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xlabel('\theta_i') nRZ T~S4
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ylabel('Amplitude') [aC2ktI
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title(['n_1=',num2str(n1),',n_2=',num2str(n2)]) \4q1<j
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axis([0 90 0 1]) Jxb+NPUB
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grid on [VB\T|$
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