| 释义 |
polariscope|pəʊˈlærɪskəʊp|
[f. med.L. polāris polar (cf. polarimeter) + -scope. Cf. F. polariscope.]
An instrument for showing the polarization of light, or viewing objects in polarized light; consisting essentially of two plates or prisms, a polarizer and an analyser; made in various forms, simple or complex, according to the special use. Also attrib.
1829Amer. Jrnl. Sci. XV. 369 (heading) Description of the polariscope, an instrument for observing some of the most interesting phenomena of polarised light. 1842G. Francis Dict. Arts etc., Polarising Apparatus, Polariscope, any instrument which is capable of showing the phenomena of polarised light. 1854Pereira's Polarized Light (ed. 2) 228 The plates of topaz sold in the opticians' shops, for polariscope purposes, have been obtained by cutting the crystal perpendicularly to one of the optic axes. c1865J. Wylde in Circ. Sc. I. 81/1 In every polariscope there are two essential parts; namely, the polariser and the analyser; the former receives and polarises the incident rays of light, and the latter presents to the eye the polarised ray either by reflection or by refraction. 1866Brande & Cox Dict. Sc., etc. II. 951/1 The polariscope proposed by Arago is formed of a tube closed at one extremity by a plate of rock crystal cut perpendicularly to the optical axis, and about five millimetres..in thickness, and having at the other end, where the eye is applied, a prism possessing the property of double refraction placed transversely to the axis of the tube.
Hence poˈlariscopist, one skilled in the use of a polariscope; polariscopy |pəʊˈlærɪskəpɪ|, the art of using a polariscope.
1872Proctor Ess. Astron. xviii. 212 More likely to supply a correct answer..than either spectroscopy, polariscopy, or photography. 1890Cent. Dict., Polariscopist. |