Astronomical monochromatic imaging as applied to the Io sodium cloud

Details Astronomical monochromatic imaging as applied to the Io sodium cloud Astronomical monochromatic imaging as applied to the Io sodium cloud

Oct 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apopt..17.3117m&link_type=abstract

Applied Optics, vol. 17, Oct. 1, 1978, p. 3117-3124.

Physics

Optics

1

Astronomical Spectroscopy, Interferometers, Io, Monochromatic Radiation, Optical Filters, Spectrographs, Imaging Techniques, Slits, Sodium

Scientific paper

Four types of instruments for recording monochromatic astronomical images are compared: filters; slitless spectrographs; multislit spectrographs; and interferometers. Each of these instruments has been used on the sodium emission cloud of Io, with varying degrees of success. Multislit spectrographs and interferometers encode the signal, and it can be extracted with a noise level close to that for photon statistics. This is not normally the case for filters and slitless spectrographs. On balance, it is found that a Mach-Zehnder interferometer provides the best system for imaging faint monochromatic signals on a brighter continuum background.

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