Chromatic aberration

Chromatic aberration is a feature of the optical lens or to the differentfocusing distances (due to the different values of refractive index) for the differentspectral colors of light (different wavelengths of light). The result is a splitting of the lightthat is visible at the borders of contrasting areas in the form of color borders. Chromatic aberration is also present in the human eye lens, causing the coloredborders (orange and blue) around dark objects against a light background. In the caseof optical systems (telescopes, photographic lenses, etc.) is a defect in the deteriorating quality of reproduction. This phenomenon is also known in the black and white photography. There are nowhat's true colors, but the chromatic aberration causes blurring of the image. Correctioncan be achieved by apochromat or by use of an appropriate color filter with a narrowband of bandwidth or by the individual channels to convert color to black and whitechannel. Some of these methods require, however, increase the exposure time.