noun (used with a singular verb)
Origin of catoptrics
Related formsca·top·tric, ca·top·tri·cal, adjectiveca·top·tri·cal·ly, adverb
Examples from the Web for catoptric
Two methods of lighting have been employed—the Catoptric and the Dioptric systems.Grace Darling|Eva Hope
The floating lights of England are illuminated by means of lamps with metallic reflectors, on what is styled the catoptric system.The Floating Light of the Goodwin Sands|R.M. Ballantyne
This optic embodied the first combination of dioptric and catoptric elements in one design (fig. 34).
Another classification divides the instruments themselves into three classes: (a) catoptric, (b) dioptric and (c) catadioptric.
Until about 1895 the illuminating apparatus used in light-vessels was exclusively of catoptric form, usually consisting of 21 in.