Answers are grounded in this paper and cite their sources.
Coma compensation in a parabolized Ebert monochromator is studied using the plate diagram. It is shown that two different criteria may be used: narrowest images or symmetrical ones; however, both may not be satisfied simultaneously. Symmetrical or narrowest images may be obtained for an extended range of wavelengths with displacement of at least one of the slits. With fixed slits only incomplete compensation may be obtained.
No takes yet. Share an insight, caveat, or question.
Gil et al. (1979) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: