achromatism

American  

[ey-kroh-muh-tiz-uhm] / eɪˈkroʊ məˌtɪz əm /

noun

Optics.

1. freedom from color.

2. freedom from chromatic aberration, as in an achromatic lens.

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Etymology

Origin of achromatism

First recorded in 1790–1800; achromat(ic) + -ism

Example Sentences

The absence of this error is termed achromatism, and an optical system so corrected is termed achromatic.

From The Project Gutenberg Encyclopedia Volume 1 of 28 by Project Gutenberg

A long list of indictments might indeed be brought against the eye—its opacity, its want of symmetry, its lack of achromatism, its partial blindness.

From Six Lectures on Light Delivered In The United States In 1872-1873 by Tyndall, John

As the diameter of the lens was so small in comparison with its focal length, its want of achromatism was inappreciable.

From Experimental Determination of the Velocity of Light Made at the U.S. Naval Academy, Annapolis by Michelson, Albert A.

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

Most insects, when exposed for any length of time to strong light, fade or lose color, and the only way to prevent such achromatism is to exclude the light.

From Directions for Collecting and Preserving Insects by Riley, C. V.