An optical lens designed and coated to correct for the tendency of light to separate into colors when passing through glass, called chromatic aberration.
An 18thC development combining FLINT GLASS and crown glass to remove distorting colour fringes from the image. It was patented by Englishman John Dollond in 1758 and used in telescopes and microscopes.
a lens specially designed and coated to correct for the tendency of light to separate into colors when passing through glass. An achromatic lens corrects this such that colors are more accurate after being magnified. BACK
a compound lens system that forms an image free from chromatic aberration
a doublet where the front lens is made of crown glass and the rear element of flint glass
Two lenses (usually cemented together) of different glasses (e.g: Flint and Crown) to cancel out chromatic aberration for two primary spectral colours.
a two-element lens, or doublet, that significantly reduces chromatic aberration
A lens with two or more elements designed to produce an image substantially free from false colour.
A special camera lens that adjusts the dispersion of foci for different colors.
A lens made of two or three separate elements which has the effect of bringing most colors to a focus, thus reducing chromatic aberration.
Lens for which all light colors have the same focal length.
A telescope lens composed of two lenses ground from different types of glass and designed to bring two selected colors to the same focus and correct for chromatic aberration
An Achromatic lens is a system of lenses joined in order to minimize color and shape distortions (chromatic and spherical aberrations) that are inherent in a single lens system.
a concave and a convex lens joined in a special fashion that eliminates dispersion and ringed colors around the image of an object that normally appear from using a single lens.
A lens that is corrected for chromatic aberration, thus reducing the false colour around a star.