- achromatic image
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ахроматическое изображение
Англо-русский словарь технических терминов. 2005.
achromatic image
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achromatic lens — n a compound lens made by combining lenses of different glasses (as flint glass and crown glass) with different focal powers so that the light emerging from the lens forms an image almost free from unwanted colors * * * a lens corrected for… … Medical dictionary
Achromatic telescope — The achromatic telescope is a refracting telescope that uses an achromatic lens to correct for chromatic aberration. How it worksWhen an image passes through a lens, the light is diffracted at different angles for different wavelengths. This… … Wikipedia
Achromatic telescope — Telescope Tel e*scope, n. [Gr. ? viewing afar, farseeing; ? far, far off + ? a watcher, akin to ? to view: cf. F. t[ e]lescope. See {Telegraph}, and { scope}.] An optical instrument used in viewing distant objects, as the heavenly bodies. [1913… … The Collaborative International Dictionary of English
Achromatic prism — Prism Prism (pr[i^]z m), n. [L. prisma, Gr. pri sma, fr. pri zein, pri ein, to saw: cf. F. prisme.] 1. (Geom.) A solid whose bases or ends are any similar, equal, and parallel plane figures, and whose sides are parallelograms. [1913 Webster] Note … The Collaborative International Dictionary of English
achromatic — Color having no chroma black, white and grays made by mixing black and white. All other colors employ chromatic pigments. (pr. AY crow MA t?ck) Also see 1 bit image, 2 bit image, 3 bit image, 4 bit image, 8 bit image, analogous, black and… … Glossary of Art Terms
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
Luma (video) — As applied to video signals, luma represents the brightness in an image (the black and white or achromatic portion of the image). Luma is typically paired with chroma. Luma represents the achromatic image without any color, while the chroma… … Wikipedia
History of the telescope — The earliest known working telescopes appeared in 1608 and are credited to Hans Lippershey and Zacharias Janssen, spectacle makers in Middelburg, and Jacob Metius of Alkmaar. The design of these early refracting telescopes consisted of a convex… … Wikipedia
Optical aberration — v · d · e Optical aberration … Wikipedia
Eyepiece — For the device for looking through a camera, see viewfinder. A collection of different types of eyepieces. An eyepiece, or ocular lens, is a type of lens that is attached to a variety of optical devices such as telescopes and microscopes. It is… … Wikipedia
