monochromatic-illuminator

monochromator

[mon-uh-kroh-mey-ter]
noun Optics.
a spectroscope with a slit that can be moved across the spectrum for viewing individual spectral bands.
Also called monochromatic illuminator.


Origin:
1905–10; monochromat(ic) + (illuminat)or

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World English Dictionary
monochromator (ˌmɒnəʊˈkrəʊmeɪtə)
 
n
physics a device that isolates a single wavelength of radiation

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