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MULTI-RING LENS, SYSTEMS AND METHODS FOR EXTENDED DEPTH OF FOCUS

  • US 20140168602A1
  • Filed: 08/30/2013
  • Published: 06/19/2014
  • Est. Priority Date: 08/31/2012
  • Status: Active Grant
First Claim
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1. An ophthalmic lens, comprising:

  • a first surface and a second surface, the first and second surfaces disposed about an optical axis;

    an aspheric refractive profile imposed on the first or second surface; and

    a diffractive profile imposed on the first or second surface,wherein the aspheric refractive profile focuses light toward a far focus, andwherein the diffractive profile comprises a central zone that distributes a first percentage of light toward a far focus and a second percentage of light toward an intermediate focus, and a peripheral zone, surrounding the central zone, that distributes a third percentage of light toward the far focus and a fourth percentage of light toward the intermediate focus.

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