double refraction


  • WordNet 3.6
    • n double refraction splitting a ray into two parallel rays polarized perpendicularly
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Webster's Revised Unabridged Dictionary
    • Double refraction (Opt) See Refraction.
    • Double refraction (Opt) the refraction of light in two directions, which produces two distinct images. The power of double refraction is possessed by all crystals except those of the isometric system. A uniaxial crystal is said to be optically positivelike quartz), or optically negativelike calcite), or to have positive, or negative double refraction, according as the optic axis is the axis of least or greatest elasticity for light; a biaxial crystal is similarly designated when the same relation holds for the acute bisectrix.
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Chambers's Twentieth Century Dictionary
    • Double refraction the separation of an incident ray of light into two refracted rays, polarised in perpendicular planes
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Chambers's Twentieth Century Dictionary
L. refringĕre, refractumre-, back, frangĕre, to break.


In literature:

Halos and double suns are very common consequences of refraction in this quarter of the world.
"Voyages in Search of the North-West Passage" by Richard Hakluyt
He deduced from it the laws of reflection and refraction, and applied it to explain the double refraction of Iceland spar.
"Six Lectures on Light" by John Tyndall
Never had the double refraction of his mind been more clearly defined.
"Mr. Britling Sees It Through" by H. G. Wells
It is highly prized by mineralogists on account of its double refractive qualities.
"Wealth of the World's Waste Places and Oceania" by Jewett Castello Gilson
It is double refracting and has no cleavage.
"The Chemistry, Properties and Tests of Precious Stones" by John Mastin
The table below gives the necessary information as to which stones show double and which single refraction.
"A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public" by Frank Bertram Wade
Soon after, reflexion, refraction, and double refraction were accounted for on that principle.
"History of the Intellectual Development of Europe, Volume II (of 2)" by John William Draper
Arago wrote "Double Refraction" and "Polarization of Light," a note to which mentions his name as author.
"Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3" by Various
For instance, suppose the subject of inquiry to be the cause of the double refraction of light.
"A System of Logic: Ratiocinative and Inductive" by John Stuart Mill
Fluor-spar, though cubic, sometimes exhibits weak double refraction, probably due to internal tension.
"Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 5" by Various

In science:

The singleclad fibres (BCF-91A SC) have a thin polymethylmethacrylate (PMMA) cladding of refractive index nclad = 1.49, the double-clad fibres (BCF-91A DC) have an inner PMMA cladding and an outer fluorinated polymethacrylate cladding of refractive index n′ clad = 1.42.
Development of a compact scintillator hodoscope with wavelength-shifting fibre read-out