Variable dispersion spectrographs

Details Variable dispersion spectrographs Variable dispersion spectrographs

May 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987crasm.304.1173b&link_type=abstract

Academie des Sciences (Paris), Comptes Rendus, Serie II - Mecanique, Physique, Chimie, Sciences de l'Univers, Sciences de la Ter

Other

Astronomical Spectroscopy, High Dispersion Spectrographs, Multispectral Tracking Telescopes

Scientific paper

To accommodate the numerous resolutions employed in multiaperture spectrographs, a variable dispersion system is proposed. To avoid the limitations inherent in high-resolution systems, a process is described for the case of the ESSEFEM multislit spectrograph in which two Carpenter gratings are used, with the two gratings being turned symmetrically with respect to the dispersion. The gratings are placed one above the other, and the resulting dispersion is obtained in the bisecting plane of the dihedral angle formed by the two gratings.

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