MULTIFOCAL LENS WITH A DIFFRACTIVE OPTICAL POWER REGION

摘要

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.

主权项

1. An electro-active lens system, comprising:
a controller for applying voltages; a plurality of individually addressable electrodes electrically connected to the controller; and electro-active material disposed between the individually addressable electrodes, wherein when the controller applies voltages to the plurality of individually addressable electrodes, the refractive index of electro-active material is altered to provide an optical power, wherein a greater portion of light incident near the geometric center of the plurality of individually addressable electrodes contributes to the optical power than light incident spaced from the geometric center of the plurality of individually addressable electrodes.