From 49de5fe553c2066520162cccd7d5dd586efc934d Mon Sep 17 00:00:00 2001
From: Blaise Thompson <blaise@untzag.com>
Date: Mon, 16 Oct 2017 21:05:48 -0500
Subject: structure

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 hardware.tex | 37 +++++++++++++++++++++++++++++++++++++
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 create mode 100644 hardware.tex

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+\chapter{Hardware}  % -----------------------------------------------------------------------------
+
+
+\section{Adjustable periscopes}  % ----------------------------------------------------------------
+
+
+Our light sources take on horizontal or vertical polarizations according to which tuning process is
+used.  %
+Our experiments are opinionated about polarization, so some strategy for aligning polarization is
+necessary.  %
+Desire fully reflective, easy to switch without changing path length (delay) etc... For several
+years, we used brewster-angle polarization unifiers...  %
+These worked by...  %
+But these were very difficult to align, and they were too lossy for some of the weaker tuning
+processes.  %
+As an alternative, we designed a more traditional periscope with adjustability for our unique
+needs.  %
+
+\begin{figure}[htp!]
+	\centering
+	\includegraphics[scale=0.1]{"hardware/periscope"}
+	\label{f:periscope}
+	\caption{CAPTION TODO}
+\end{figure}
+
+\begin{enumerate}
+  \item in flipped polarization:
+    \begin{itemize}
+      \item stage near
+      \item upper mirror far
+    \end{itemize}
+  \item in kept polarization:
+    \begin{itemize}
+      \item stage x and upper mirror height near
+      \item lower mirror far
+    \end{itemize}
+\end{enumerate}
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