double-beam spectrometer (for luminescence spectroscopy)
Double (spectral) beam spectrometers are used where two samples are to be excited by two different wavelengths. A double- (@[email protected]) beam @[email protected] is a @[email protected] in which both the excitation and emission monochromators scan the excitation and emission spectra simultaneously, usually with a fixed @[email protected] difference between excitation and emission.
Orange Book, 2nd ed., p. 191 [Terms] [Book]