achromatism
AmericanEtymology
Origin of achromatism
First recorded in 1790–1800; achromat(ic) + -ism
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Thus examined, the departure of the eye from achromatism appears very gross indeed.
From Six Lectures on Light Delivered In The United States In 1872-1873 by Tyndall, John
Newton failed to perceive the existence of media of different dispersive powers required by achromatism; consequently he constructed large reflectors instead of refractors.
From The Project Gutenberg Encyclopedia Volume 1 of 28 by Project Gutenberg
The perfect achromatism of a reflector is, of course, a great advantage, but the chromatic aberration of refractors is now so well corrected that their inferiority in that respect may be disregarded.
From Pleasures of the telescope An Illustrated Guide for Amateur Astronomers and a Popular Description of the Chief Wonders of the Heavens for General Readers by Serviss, Garrett Putman
He will find that he has not given exactly the proper curves to secure achromatism.
From Side-Lights on Astronomy and Kindred Fields of Popular Science by Newcomb, Simon
If all three constants of reproduction be achromatized, then the Gaussian image for all distances of objects is the same for the two colours, and the system is said to be in ``stable achromatism.''
From The Project Gutenberg Encyclopedia Volume 1 of 28 by Project Gutenberg
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