Polychromator

A polychromator is an optical device that is used to disperse light into different directions to isolate parts of the spectrum of the light. A prism or diffraction grating can be used to disperse the light. Unlike a monochromator, it outputs multiple beams over a range of wavelengths simultaneously. Monochromators have one exit slit and one wavele...
Found on http://en.wikipedia.org/wiki/Polychromator

Polychromator

A device for isolating narrow portions of the spectrum by dispersing light into its component wavelengths.
Found on https://www.hunterlab.com/glossary.html
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