Multifocal lens with a diffractive optical power region

Details Multifocal lens with a diffractive optical power region Multifocal lens with a diffractive optical power region

G - Physics

02

C

G02C 7/06 (2006.01)

Patent

CA 2691519

A lens system is presented having a diffractive optical power region. The diffractive optical power region has a plurality of concentric surface relief diffractive structures. A greater portion of light incident on a diffractive structure near the center point contributes to the optical power than light incident on a diffractive structure peripherally spaced therefrom.

L'invention concerne un système de verre multifocal ayant une région de puissance optique de diffraction. La région de puissance optique de diffraction comprend une pluralité de structures diffractives à relief de surface concentrique. La lumière incidente sur une structure diffractive à proximité du point central contribue davantage à la puissance optique que la lumière incidente sur une structure diffractive espacée du point central sur la périphérie.

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