achromatic lens

American  

noun

Optics.

1. a system of two or more lenses that is substantially free from chromatic aberration and in which the lenses are made of different substances so that the focal length of the system is the same for two or three wavelengths of light.

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Etymology

Origin of achromatic lens

Probably earlier than 1860–65

Example Sentences

See Examples For:

achromatic lens

The two spectra do not coincide, and the result, if an achromatic lens be made of these glasses, must be a remnant of color which cannot be neutralized.

From Scientific American Supplement, No. 561, October 2, 1886 by Various

If not, the substitution of an achromatic lens will be of no advantage.

From Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 4 "Diameter" to "Dinarchus" by Various

One is painted with the most brilliant hues of Romanticism, and glows with the essence of the Romantic spirit--Aspiration; the other looks at life through an achromatic lens, and is a catalogue of Realities.

From Essays on Russian Novelists by Phelps, William Lyon

It was this accuracy of convergence of the light which led Dr. Draper to prefer the mirror to the achromatic lens.

From The Atlantic Monthly, Volume 12, No. 69, July, 1863 by Various

Calculation shows that, if the aperture be 1⁄5 in., an achromatic lens has no sensible advantage if the focal length be greater than about 11 in.

From Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 4 "Diameter" to "Dinarchus" by Various