Uviol definitions and example sentences on Wordnik

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Definitions (3)

A glass of special composition which is more completely transparent to ultra-violet light than are ordinary glasses, transmitting wavelengths as short as 0·25μ. Uviol glass is used in the construction of spectrographs and for other apparatus where transmitting power in the extreme ultra-violet is essential. The word is an arbitrary abbreviation of ultraviolet.
Uviol lamp a mercury-arc lamp in which the vacuum-tube is made of uviol glass. The light from such lamps has greater actinic activity than the light from those in which ordinary glass is used, on account of the transparency of uviol glass for radiation of the shorter wave-lengths.
Uviol prism a prism of uviol glass, which affords a spectrum extending further into the ultra-violet than can be obtained with prisms of ordinary flint glass.