@bachelorsthesis{1997H,
  title={Optical filtering and far-infrared reflectance measurements of SMTIO3},
  author={Mylo Hildebrand},
  month={April},
  year={1997},
  abstract={The filtering for a system consisting of a Martin-Puplett type polarizing
interferometer and a Helium-3 cryostat, originally designed to measure
optical properties of materials in the very far-infrared at extremely low
temperatures was modified in order to widen the spectral range. The changes
made to the cryostat involved a redesigning of the existing filters,
windows and lenses. The new filters consisted of a combination of
polyethylene and diamond powder. The windows, which provide a vacuum seal
for the cryostat as well as another filtering stage, were constructed of
white polyethylene. Plano-convex polyethyline lenses were also designed and
tested. Reflectance measurements were carried out on a doped magnetic
insulator to test the modified system. The optical properties were
investigated above and below an antiferromagnetic ordering transition
revealing a magnon mode at low temperatures.},
  note={Supervised by M. Reedyk}
}