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%% 
%%  Ein Beispiel der DANTE-Edition
%%  
%%  7. Auflage
%% 
%%  Beispiel 32-03-34 auf Seite 742.
%% 
%%  Copyright (C) 2016 Herbert Voss
%% 
%%  It may be distributed and/or modified under the conditions
%%  of the LaTeX Project Public License, either version 1.3
%%  of this license or (at your option) any later version.
%% 
%%  See http://www.latex-project.org/lppl.txt for details.
%% 
%% 
%% ==== 
% Show page(s) 1
%% 
%% 
\documentclass[]{exaarticle}
\pagestyle{empty}
\setlength\textwidth{352.81416pt}
\setlength\parindent{0pt}
%StartShownPreambleCommands
\usepackage{pst-optexp, nicefrac}
%StopShownPreambleCommands
\begin{document}
\begin{pspicture}(-4.2,-1)(3,3)
\pnodes(-2,0){LOut}(0,0){Grat}(4;45){Out}(2.5;70){Mvar}
\newpsstyle{Beam}{linewidth=2\pslinewidth, linecolor=red!90!black}
\begin{optexp}
\optbox[optboxwidth=2.2, labeloffset=0, position=start](LOut)(Grat){diode laser}
\mirror[variable, label=0.5](Grat)(Mvar)(Grat){M$_\mathrm{var}$}
\optretplate[position=0.3](LOut)(Grat){$\nicefrac{\lambda}{4}$}
\optgrating(LOut)(Grat)(Out){grating}
\drawbeam[arrows=->]{1}{3}{4}(Out)
\drawbeam{2}{4}
\end{optexp}
\rput[l](-3,2){Littman setup}
\end{pspicture}
\end{document}