A four-pass high resolution spectrometer for the near infrared.
A high resolution Littrow type grating spectrometer designed for four-pass operation in the near ir is described. Using 20-cm gratings, four passed in first and second orders, this instrument achieves a spectral resolution between 0.015 cm(-1) and 0.025 cm(-l) in the l.9-micro to 3.6-micro region. This resolution is up to 40% better than that realized with the same system double passed.
Hunt
R H
RH
Department of Physics, Florida State University, Tallahassee, Florida 32306, USA.
Robertson
C W
CW
Plyler
E K
EK