Friday, March 28, 2008

APOCHROMATIC

Definition: The inability to bring light of all colours to the same plane of focus is known as chromatic aberration. Light refraction is a function of wavelength, and as such each colour is normally brought to as lightly different plane of focus. By using complex lens designs, special glass materials and coating, designer can bring the colours within a much narrower focus. When such a lens is designed it is said to be Apochromatic.

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