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â¢ CONCAVE LENS (noun) The noun CONCAVE LENS has 1 sense: 1. a lens such that a parallel beam of light passing through it is caused to diverge or spread out. Familiarity information: CONCAVE LENS used as a noun is very rare.
Aspheric Lens: An aspheric lens is designed for aberration correction. With the help of aspheric lens, the image formed is distortion free. An aspheric lens is a lens whose surfaces profile neither a portion of a sphere nor of a circular cylinder. Since it is not spherical, the conventional processes no longer apply to making aspheric surfaces. This is why aspheric cost many times what spherical surfaces do.