CSF and urinary biogenic amines and metabolites in depression and mania

A method and means facilitating alignment of a focusing mirror in an optical spectrometer to maximize resolution and performance capability. More particularly, in an optical spectrometer having a monochromator with entrance and exit ports and a grating, an improved method and means for aligning a focusing mirror so that an optical beam can be easily and accurately focused on the entrance or exit ports of the monochromator or on its grating.