Spectroscopy or the examining of spectra is researched in colour physics laboratories. See the Colour Group of Great Britain’s website for further information - www.colour.org.uk
The most interestng of recent books on spectroscopy is a work by George Sweetnam who focuses on this subject in desribing the work of what he calls Rowland's School of Physics.
SWEETNAM, GK. (2001) The Command of Light. USA: American Philosophical Society Vol. 238.