A Cassegrain echelle spectrograph

Details A Cassegrain echelle spectrograph A Cassegrain echelle spectrograph

Nov 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991pasp..103.1187h&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 103, Nov. 1991, p. 1187-1192. Research supported by NAS

Physics

Optics

13

Airglow, Cassegrain Optics, Charge Coupled Devices, Echelette Gratings, Spectrographs, Lunar Atmosphere, Mercury Atmosphere, Spatial Resolution

Scientific paper

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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