To correct chromatic aberration in an optical system; to make or become colorless; American spelling variant.
From 'achromat-' (colorless) + '-ize' (American verb suffix). American spelling variant standardized in the 1800s as optical science professionalized.
When lens makers achromatize a piece of glass, they're often using a technique called 'crown-and-flint' pairing—two glasses that bend light differently but work together like an optical dance partner!
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