Achromatic lens Meaning, Definition & Usage

  1. noun a compound lens system that forms an image free from chromatic aberration

WordNet


Definitions
  1. (Opt.), a lens composed usually of two separate lenses, a convex and concave, of substances having different refractive and dispersive powers, as crown and flint glass, with the curvatures so adjusted that the chromatic aberration produced by the one is corrected by other, and light emerges from the compound lens undecomposed.

Webster 1913