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Multifocal lens with a diffractive optical power region

  • US 9,411,172 B2
  • Filed: 10/22/2012
  • Issued: 08/09/2016
  • Est. Priority Date: 07/03/2007
  • Status: Active Grant
First Claim
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1. A lens system comprising:

  • a diffractive optical power region comprising a plurality of concentric diffractive structures, wherein a greater fraction of light incident on a diffractive structure near the center point of the concentric diffractive structures contributes to the optical power of the diffractive optical power region than light incident on a diffractive structure peripherally spaced therefrom, wherein the diffractive optical power region is cropped so as to include at least one discontinuous diffractive structure and at least one diffractive structure with a complete closed curve.

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