Apodized diffractive IOL with frustrated diffractive region

Details Apodized diffractive IOL with frustrated diffractive region Apodized diffractive IOL with frustrated diffractive region

2006-08-02

2009-08-11

Collins, Darryl J (Department: 2873)

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

C351S161000, C623S006270

Reexamination Certificate

active

07572007

ABSTRACT:
In one aspect, the present invention provides a diffractive ophthalmic lens (e.g., a diffractive IOL) that includes an optic having an anterior surface and a posterior surface, where the optic provides a far focus. A frustrated diffractive structure comprising a plurality of diffractive zones is disposed on at least one of those surfaces so as to provide a near focus. Each zone is separated from an adjacent zone by a zone boundary that imparts an optical delay to the incident light. Further, at least two consecutive zone boundaries are configured such that a difference between their associated phase delays for at least one wavelength of the incident light is greater than about ¼ wavelength so as to direct a portion of the incident light to a location between the near and far foci.

REFERENCES:
patent: 5470932 (1995-11-01), Jinkerson
patent: 5699142 (1997-12-01), Lee et al.
patent: 7188949 (2007-03-01), Bandhauer et al.
patent: 2007/0182924 (2007-08-01), Hong et al.

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