The process of becoming colorless or removing color; in optics, the correction of chromatic aberration in a lens system.
From 'achromatise' (British spelling) + '-ation' (suffix forming nouns). Developed in 19th-century optics as scientists refined the technique for correcting lens color distortion.
The achromatisation of early telescope lenses was a monumental breakthrough—by carefully combining two different types of glass, scientists accidentally invented the same technique now used in modern camera phones!
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