| 单词 | nicol prism |
| 释义 | > as lemmasNicol prism In full Nicol prism (also Nicol's prism). A device for producing plane-polarized light, consisting of two pieces of optically clear calcite or Iceland spar cemented together with Canada balsam in the shape of a prism, so that only the extraordinary ray of doubly refracted light is transmitted, the ordinary ray being reflected out at the side of the prism. ΘΚΠ the world > physical sensation > sight and vision > optical instruments > instruments to refract, etc., light > [noun] > prism prism1612 Nicol prism1838 Foucault prism1882 biprism1884 Fresnel biprism1890 Porro prism1909 pentaprism1937 the world > matter > physics > electromagnetic radiation > light > refraction > [noun] > prism prism1612 Nicol1838 1837 E. Sang in Proc. Royal Soc. Edinb. (1891) 18 323 (title) Investigation of the action of Nicol's polarising eye-piece.] 1838 Encycl. Brit. XV. 477 If the Iceland spar is converted into two of Nicol's prisms, then each prism performs exactly the same part as the tourmaline and the reflectors, exhibiting only one of the complementary colours. 1843 London, Edinb., & Dublin Philos. Mag. 22 243 I find it a most material improvement to substitute a Nicol prism for the plate of glass. 1863 E. Atkinson tr. A. Ganot Elem. Treat. Physics vii. viii. 485 The Nicol's prism is one of the most valuable means of polarising light. 1870 Nature 20 Oct. 489/1 A concave plate of selenite, placed between the Nicol and the water, showed a system of vividly coloured rings. 1906 Jrnl. Chem. Soc. 89 ii. 1150 The nicols were rotated. 1955 W. Gaddis Recognitions iii. v. 874 If we can fix a microscope up with polarized light and put a particle of the pigment under it, we can see whether it's isotropic or anisotropic, for that we use nicol prisms. 1993 Dict. National Biogr.: Missing Persons at Nicol, William The true theory of the Nicol prism was not clearly understood even by its inventor. < as lemmas |
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