(under the class definition) Subject matter including a body having an index of refraction that varies according to the wavelength for separation of the spectral components of incident light.
(1) Note. A dispersive monochromator, which separates the spectral components of incident light, is classified in this subclass.
(2) Note. The optical system of a monochromator forms a series, one for each wavelength, of its entrance slit in the plane of the exit slit.
