Achromatism - определение. Что такое Achromatism
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Что (кто) такое Achromatism - определение

FAILURE OF A LENS TO FOCUS ALL COLORS ON THE SAME POINT
Achromatism; Chromatic Aberration; Chromatic Abberation; Chromatic aberrations; Color aberration; Chromatism; Chromatic fringeing; Lateral chromatic aberration; Chromatic distortion; Color error; Spherochromatism
  • Photographic example showing high quality lens (top) compared to lower quality model exhibiting transverse chromatic aberration (seen as a blur and a rainbow edge in areas of contrast.)
  • Focal length of lens varies with the color of light
  • Chromatic correction of visible and near infrared wavelengths. Horizontal axis shows degree of aberration, 0 is no aberration. Lenses: 1: simple, 2: achromatic doublet, 3: apochromatic and 4: superachromat.
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Achromatism         
·noun The state or quality of being achromatic; as, the achromatism of a lens; achromaticity.
achromatism         
n.
Absence of color, want of color, freedom from color, perfect transparency, freedom from iridescence.
achromat         
OPTICAL INSTRUMENT CORRECTED FOR DISPERSION AT 2 WAVELENGTHS
Achromatic doublet; Achromat; Achromatic Lens; Achromatic lense; Achromatic loupe
['akr?(?)mat]
¦ noun an achromatic lens.
Achromatic lens         
OPTICAL INSTRUMENT CORRECTED FOR DISPERSION AT 2 WAVELENGTHS
Achromatic doublet; Achromat; Achromatic Lens; Achromatic lense; Achromatic loupe
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 on the same plane.
Chromatism         
·noun An abnormal coloring of plants.
II. Chromatism ·noun The state of being colored, as in the case of images formed by a lens.
Chromatic aberration         
In optics, chromatic aberration (CA), also called chromatic distortion and spherochromatism, is a failure of a lens to focus all colors to the same point. It is caused by dispersion: the refractive index of the lens elements varies with the wavelength of light.
chromatic aberration         
¦ noun Optics the effect produced by the refraction of different wavelengths of light through slightly different angles, resulting in a failure to focus.

Википедия

Chromatic aberration

In optics, chromatic aberration (CA), also called chromatic distortion and spherochromatism, is a failure of a lens to focus all colors to the same point. It is caused by dispersion: the refractive index of the lens elements varies with the wavelength of light. The refractive index of most transparent materials decreases with increasing wavelength. Since the focal length of a lens depends on the refractive index, this variation in refractive index affects focusing. Chromatic aberration manifests itself as "fringes" of color along boundaries that separate dark and bright parts of the image.