NASA NTRS · 19920033357
A Cassegrain echelle spectrograph
Abstract
The 'LPL echelle' is a CCD spectrograph with a resolving power of 160,000 and enough sensitivity to detect the brighter airglow emissions in a few minutes. It uses an R3.2 grating in a novel out-of-plane mounting that permits any wavelength to be placed on the blaze. A single order is selected by a medium-band interference filter. Lower dispersions and broader wavelength coverage are obtained by replacing the echelle by a 600 line/mm grating or a Littrow prism.
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Hunten, D. M., Wells, W. K., Brown, R. A., Schneider, N. M., Hilliard, R. L.. 1991-11-01. A Cassegrain echelle spectrograph. https://ntrs.nasa.gov/citations/19920033357
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