I want to draw a Z-Scan experimental setup. My lab's DPSS Laser has a beam radius of some value, and I change this value by using a simple telescope. It was supposed to be easy to draw this using pst-optexp package. Problem is I can't find the correct focal lengths to collimate the beam again. Here's an example of what I'm saying:
As one can easily see, the beam is not exactly leaving the last lens perfectly collimated. It's still diverging a little bit, like I'm making some mistake in positioning the lenses. Problem is I've set them to have lensradius=1 and lensradius=2, and it doesn't seem that in this case the focal length is exactly 1. It seems to be a little offset, a little longer than 1.
If someone could help me with a solution to draw collimated beams, I would appreciate.
My code to generate the image was written as follows (sorry for the mess):
\documentclass[]{revtex4}
\usepackage{pst-optexp}
\usepackage{pst-node}
\begin{document}
\begin{pspicture}
\pnodes(1,1){S}(0,3){A}(11,5){BS}(13,1){M1}(13,5){M2}(1,1){S}
\pnodes(4,1){L1}(7,1){L2}(1,5){D1}(11,7){D2}(3,1){P}(10,5){L3}
\psset{mirrortype=extended, mirrordepth=0.2}
\begin{optexp}
\optsource[innerlabel](S)(P){DPSS}
\polarization[poltype=parallel] (S)(P)
\lens[compname=L1,lensradius=2] (L1)(L1)
\lens[compname=L2,lensradius=1] (L2)(L2)
\mirror[compname=M1](S)(M1)(M2)
\mirror[compname=M2](M1)(M2)(BS)
\optdetector[compname=Det1](BS)(D1)
\drawwidebeam[beamwidth=0.4,fillstyle=solid,fillcolor=green!20!white]
(S){L1}{L2}{M1}{M2}{Det1}
\end{optexp}
\end{pspicture}
\end{document}
(7.1,1){L2}
– user2478 May 18 '16 at 20:15