Achromatic lens

Achromatic lens
Achromatic Ach`ro*mat"ic, a. [Gr. ? colorless; 'a priv. + ?, ?, color: cf. F. achromatique.] 1. (Opt.) Free from color; transmitting light without decomposing it into its primary colors. [1913 Webster]

2. (Biol.) Uncolored; not absorbing color from a fluid; -- said of tissue. [1913 Webster]

{Achromatic lens} (Opt.), a lens composed usually of two separate lenses, a convex and concave, of substances having different refractive and dispersive powers, as crown and flint glass, with the curvatures so adjusted that the chromatic aberration produced by the one is corrected by other, and light emerges from the compound lens undecomposed.

{Achromatic prism}. See {Prism}.

{Achromatic telescope}, or {microscope}, one in which the chromatic aberration is corrected, usually by means of a compound or achromatic object glass, and which gives images free from extraneous color. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

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  • Achromatic lens — An achromatic lens or achromat is a lens that is designed to limit the effects of chromatic and spherical aberration. Achromatic lenses are corrected to bring two wavelengths (typically red and blue) into focus in the same plane.The most common… …   Wikipedia

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  • achromatic lens — lens composed usually of two separate lenses used to produce images free of chromatic aberrations …   English contemporary dictionary

  • achromatic lens — noun Date: circa 1864 a lens made by combining lenses of different glasses having different focal powers so that the light emerging from the lens forms an image practically free of chromatic aberration …   New Collegiate Dictionary

  • achromatic lens — noun a compound lens system that forms an image free from chromatic aberration • Hypernyms: ↑compound lens …   Useful english dictionary

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  • achromatic lens — noun A lens generally composed of two separate lenses, one convex and one concave and generally of different materials, in such a way that the chromatic aberration produced by one is corrected by the other …   Wiktionary

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