chromatic aberration: see aberration aberration, in optics, condition that causes a blurring and loss of clearness in the images produced by lenses or mirrors. Of the many types of aberration, the two most significant to the lens maker are spherical and chromatic.
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chromatic aberration

Fringes of color at the edges of objects in a photograph due to the inability of the camera lens to deal with all wavelengths of light equally. High-quality lenses that use multiple elements generally diminish chromatic aberration. See purple fringing and lens flare.

chromatic aberration [krō′mad·ik ab·ə′rā·shən]

(electronics)

An electron-gun defect causing enlargement and blurring of the spot on the screen of a cathode-ray tube, because electrons leave the cathode with different initial velocities and are deflected differently by the electron lenses and deflection coils.

(optics)

An optical lens defect causing color fringes, because the lens material brings different colors of light to focus at different points. Also known as color aberration.

Chromatic aberration

The type of error in an optical system in which the formation of a series of colored images occurs, even though only white light enters the system. Chromatic aberrations are caused by the fact that the refraction law determining the path of light through an optical system contains the refractive index, which is a function of wavelength. Thus the image position and the magnification of an optical system are not necessarily the same for all wavelengths, nor are the aberrations the same for all wavelengths. See Aberration (optics), Refraction of waves