Microspectroscopy involves the combination of microscope and spectroscope optics for the purpose of investigating the spectra of small samples. The general methods of microspectroscopy are described as applied to absorption measurements in the ultraviolet, visible, and infra-red regions, emission spectroscopy, and other applications. Recently developed components and systems for microspectroscopy are emphasized, and some of the important requirements for their effective design and use are considered briefly.
JOHN R. LOOFBOUROW, "Microspectroscopy," J. Opt. Soc. Am. 40, 317-325 (1950)