Abstract
In this paper we discuss the aberration properties and design procedure of in-plane Ebert spectrograph using conventional as well as holographic diffraction gratings. In both cases the gratings are situated at the well-known √3-position so that the spectrum can be recorded on a flat surface. It has been found that the holographic grating system has better resolution than the conventional grating system. The design parameters of a medium sized holographic grating spectrograph in which a concave spherical mirror is mounted in the off-axis configuration have been specified. The performance of the spectrograph has been evaluated by plotting spot diagram.
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Das, N.C., Murty, M.V.R.K. Holographic grating based Ebert spectrograph. Pramana - J Phys 29, 167–182 (1987). https://doi.org/10.1007/BF02845724
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DOI: https://doi.org/10.1007/BF02845724