aspheric

aspheric
aspheric [ā΄sfir′ik]
adj.
designating or of a lens or mirror made so that it is not perfectly spherical, as to minimize spherical aberration: also aspherical

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a·spher·ic (ā-sfîrʹĭk, ā-sfĕrʹ-) also a·spher·i·cal (-ĭ-kəl) adj.
Varying slightly from sphericity and having only slight aberration, as a lens.

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Universalium. 2010.

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