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chromatic aberration

chromatic aberration

A Dictionary of Astronomy | 1997 | Copyright

chromatic aberration False colour in a refracting optical system, arising because light of different wavelengths is refracted by different amounts. The most common example is the coloured fringes that appear round images produced by a simple lens. Red light is refracted less than blue light, so the red focus lies farther from a lens than the blue focus. An image which is in focus in yellow light will therefore have a red fringe. The longer the focal ratio of a lens, the less chromatic aberration it will show. Early telescopes were made with very long focal ratios for this reason. The achromatic lens was invented to overcome chromatic aberration.
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chromatic aberration

The Columbia Encyclopedia, 6th ed. | 2011 | Copyright

chromatic aberration see aberration , in optics.

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"chromatic aberration." The Columbia Encyclopedia, 6th ed.. 2011. Encyclopedia.com. (May 30, 2012). http://www.encyclopedia.com/doc/1E1-X-chromat-ab.html

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