Summary

TeX source

\documentclass{article}
 
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{tikz}
\usepackage{scalefnt}
 
\begin{document}
\pagestyle{empty}
\def\lineticktop#1#2{
 \draw[-] ({#1},3.075) node [anchor=south] {#2} -- (#1,2.925) ;
}
\def\linetickbot#1#2{
 \draw[-] ({#1},-0.075) node [anchor=north] {#2} -- (#1,0.075) ;
}
\def\microscope#1{
 \draw [thick,- ] (#1 -0.25,2.15) -- (#1+0,3) -- (#1 +0.25,2.15) ;
 \draw [thick,fill=white] (#1 +0.00,1.50) circle (1) ; 
 \fill [white ] (#1 -0.25,2.15) -- (#1+0,3) -- (#1 +0.25,2.15) ;
 \draw [thick,blue,-> ](#1-0.95,1.5) -- (#1+0.95,1.5) ;
}
\def\microtick#1#2#3#4#5#6{
 \draw [-,#5] (#1+0.375*#2,1.5+#3) node [anchor=#6,font=\small] {#4} -- (#1+0.375*#2,1.5-#3) ;
 \draw [red,thin] (#1+0.375*#2,1.3) to [out=-90,in=90] (#1+0.00,0.6);
}
\begin {tikzpicture} [scale=2]
 \draw[blue,thick,->] (-1.1,3) -- (4.1,3) coordinate (x axis);
 
 \microscope {1.41}
 \microtick {1.41}{-0.2}{0.1}{$r$}{}{south}
 \microtick {1.41}{ 0.7}{0.05}{\tiny $r+\epsilon$}{blue}{south}
 \microtick {1.41}{ 2.1}{0.05}{\tiny $r+\gamma$} {blue}{south}
 \microtick {1.41}{-1.7}{0.05}{\tiny $r+\eta$} {blue}{south}
 \draw[red,->] (1.41,0.6) -- (1.41,0.325) node [anchor=west] {$\scriptstyle\operatorname{st}$} -- (1.41,0.15) ;
 \lineticktop{-1}{$-1$}
 \linetickbot{-1}{$-1$}
 \lineticktop{ 0}{$0$}
 \linetickbot{ 0}{$0$}
 \lineticktop{+1}{$1$}
 \linetickbot{+1}{$1$}
 \lineticktop{+2}{$2$}
 \linetickbot{+2}{$2$}
 \lineticktop{+3}{$3$}
 \linetickbot{+3}{$3$}
 \lineticktop{+4}{$4$}
 \linetickbot{+4}{$4$}
 \lineticktop{+1.41}{}
 \linetickbot{+1.41}{$ r$}
 \draw[->] (-1.1,0) -- (4.1,0) coordinate (x axis);
\end {tikzpicture}
\end{document}

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