Definition: A lens surface that possesses more than one radius of curvature. The aspherical elements compensate for the multitude of lens aberrations common in simpler lens designs.
Definition: lens surface with more than one radius of curvature, i. e. the surface does not form part of a sphere.
Definition: lens surface with more than one radius of curvature, i. e. the surface does not form part of a sphere.
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