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apochromat
apochromat (ˌæpəˈkrəʊmæt) or apochromatic lensn (General Physics) a lens, consisting of three or more elements of different types of glass, that is designed to bring light of three colours to the same focal point, thus reducing its chromatic aberration. Compare achromatapochromat
apochromat[‚ap·ə′krō·mat] (optics) apochromatic lens |