Abstract
ABSTRACT Principles common to the design of all spectrographs using echelles as the main dispersing element and gratings for the cross dispersion are discussed. Consideration is given to the possibilities of a Cassegrain echelle spectrograph for an f/8 beam, and a comparison of its features with those of conventional grating spectrographs. Results are presented in a form which makes them useful for echelle spectrograph design for any telescope.
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