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  • Webster's Revised Unabridged Dictionary
    • n Dioptrics (Optics) The science of the refraction of light; that part of geometrical optics which treats of the laws of the refraction of light in passing from one medium into another, or through different mediums, as air, water, or glass, and esp. through different lenses; -- distinguished from catoptrics, which refers to reflected light.
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Century Dictionary and Cyclopedia
    • n dioptrics That part of optics which treats of the refraction of light passing through different media, as air, water, or glass, and especially through lenses. The term is now not much used by scientific writers, the phenomena to which it refers being treated under the general head of refraction (which see). See also lens, light, and optics. Also called anaclastics.
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Chambers's Twentieth Century Dictionary
    • Dioptrics the part of optics which treats of the transmission of light from one medium to another
    • ***


Webster's Revised Unabridged Dictionary
Gr. : cf. F. dioptrique,
Chambers's Twentieth Century Dictionary
Gr. dia, through, opt-, as in opsesthai, to see, &c.


In literature:

He applied this geometrical and inventive genius to dioptrics, which, when treated of by him, became a new art.
"Letters on England" by Voltaire
Associated Words: photology, photologist, photophobia, catoptrics, dioptrics, photics, Ormuzd, luminary.
"Putnam's Word Book" by Louis A. Flemming
Invention of the Ovals of Mr. Des Cartes for Dioptrics.
"Treatise on Light" by Christiaan Huygens
Dioptric: with a transversely divided ocellus.
"Explanation of Terms Used in Entomology" by John. B. Smith
The light is of the 4th order dioptric, showing a red arc of 270 deg.
"Report on the Department of Ports and Harbours for the Year 1890-1891" by Department of Ports and Harbours
The light is a dioptric or lens-light of the first order.
"A Yacht Voyage Round England" by W.H.G. Kingston
Two years before the publication of his Dioptrics, viz.
"The Martyrs of Science, or, The lives of Galileo, Tycho Brahe, and Kepler" by David Brewster
In dioptrics, is a geometrical solid bounded by three parallelograms, whose bases are equal triangles.
"The Sailor's Word-Book" by William Henry Smyth
She looked longingly at the great lamp and the twinkling diamonds of the dioptric lens.
"The Pillar of Light" by Louis Tracy
A new lantern and dioptric apparatus were erected on the tower in 1902.
"Encyclopaedia Britannica, 11th Edition, Volume 16, Slice 6" by Various

In science:

Speeds faster than f/2 usually require catadioptric (Schmidt) cameras which have fairly inaccessible focal planes, although dioptric cameras are preferred if the detector obscures a signi´Čücant fraction of the beam.
Classical Spectroscopy