For ASPHERICAL LENS we have terms and definitions in 2 topics. The topics are CCTV and Photography.

ASPHERICAL LENS (CCTV)

A lens one or more of whose elements has a non-spherical surface. Aspherical surfaces are shaped to reduce the spherical and other aberrations.

ASPHERICAL LENS (Photography)

A lens whose curved surface does not conform to the shape of a sphere; lenses are usually ground or molded with spherical surfaces; because a spherical surface lens has difficulty in correcting distortion in ultra-wideangle lenses or coma in large-aperture lenses brought about by spherical aberration, an aspherical lens is used.

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