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Lambda Research Optics, Inc. - DFO
Photonics Dictionary

achromatism

Achromatism refers to the optical property of a lens, prism, or optical system that minimizes or eliminates chromatic aberration. Chromatic aberration is the phenomenon where different wavelengths (colors) of light are focused at different distances from the lens or prism, causing colored fringes or blurring in the image.

Achromatism is achieved by combining optical elements or materials with different dispersion properties (the way they refract different wavelengths of light) in a way that compensates for each other's chromatic effects. This compensation results in better color correction and improved image quality, particularly in applications requiring precise color reproduction and minimal color fringing, such as in lenses for cameras, microscopes, telescopes, and other optical instruments.
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