nicol's prism

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Definition of nicol's prism in English English dictionary

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Nicol prism

An optical device used to generate polarized light

You are in mortal danger,” declared their Scientific Officer, Dr. Counterfly, a scholarly sort, bearded and bundled like the rest of them, his eyes concealed by a pair of ingenious goggles, whose lenses proved to be matched pairs of Nicol prisms which could be rotated so as to control precisely the amount of light admitted to each eye.

nicol prism

optical device that produces plane-polarized light