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$\begin{figure} \par\includegraphics[width=4.2cm,clip]{Hc171_fig1.eps} \end{figure}$ Figure 1: Gravitational lens geometry for the source, the lens and the observer. The lens is distributed around the origin. The source position is $\vec{r}_{\rm S} =({\bf 0},-D_{\rm LS})$ , while the observer position is $\vec{r}_{\rm o}=(\vec{s}_{\rm o}, D_{\rm L})$ where $\vec{s}_{\rm o}$ is a two-dimensional vector with $\vert\vec{s}_{\rm o}\vert \ll D_{\rm L}$ . $D_{\rm L}$ and $D_{\rm LS}$ are the distances from the lens to the observer and to the source, respectively. $\phi ^0$ is the incident wave, while $\phi ^0 + \phi ^1$ is the scattered wave.
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In the text

$\begin{figure} \par\includegraphics[width=5.4cm,clip]{Hc171_fig2.eps} \end{figure}$ Figure 2: $E_{\rm i}({\rm i}x)$ as a function of x. The solid line is the absolute value of $E_{\rm i}$ , the dashed line is the real part, and the dotted line is the imaginary part.
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In the text

$\begin{figure} \par\includegraphics[width=5.4cm,clip]{Hc171_fig2.eps} \end{figure}$	Figure 2: $E_{\rm i}({\rm i}x)$ as a function of x. The solid line is the absolute value of $E_{\rm i}$ , the dashed line is the real part, and the dotted line is the imaginary part.
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