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.
- Publication:
-
Publications of the Astronomical Society of the Pacific
- Pub Date:
- November 1991
- DOI:
- 10.1086/132939
- Bibcode:
- 1991PASP..103.1187H
- Keywords:
-
- Airglow;
- Cassegrain Optics;
- Charge Coupled Devices;
- Echelette Gratings;
- Spectrographs;
- Lunar Atmosphere;
- Mercury Atmosphere;
- Spatial Resolution;
- Astronomy;
- INSTRUMENTS