Bifocal multiorder diffractive lenses for vision correction
First Claim
1. A bifocal multiorder diffractive lens comprising:
- a lens body defining an aperture of the lens;
at least one first region on said lens body having a multiorder diffractive structure providing near vision correction; and
one or more second regions on said body having a multiorder diffractive structure providing distance vision correction, in which said aperture of the lens is divided between said first and second regions.
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Accused Products
Abstract
A bifocal multiorder diffractive lens is provided having a lens body with one or more first regions having a first multiorder diffractive structure providing near vision correction, and one or more second regions having a second multiorder diffractive structure providing distance vision correction, in which the lens defines an aperture divided between the first and second regions. Such one or more first regions may represent one or more annular rings, or other portion of the lens, and the second region may occupy the portion of the lens aperture outside the first region. The lens body may be provided by a single optical element or multiple optical elements. When multiple optical elements are used, the multiorder diffractive structures may be located along an interior surface of the lens. In other embodiments, a bifocal multiorder diffractive lens is provided by a single or multiple element lens body having a multiorder diffractive structure for distance vision correction and one or more refractive regions to add power for near vision correction, or a single or multiple element lens body shaped for refractive power for distance vision correction and a multiorder diffractive structure for add power for near vision correction. The lens may represent a contact lens, a spectacle lens, or the optic portion of an intraocular implant (IOL). Multiorder diffractive structures may be optimized for performance for photopic and scotopic vision.
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Citations
49 Claims
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1. A bifocal multiorder diffractive lens comprising:
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a lens body defining an aperture of the lens;
at least one first region on said lens body having a multiorder diffractive structure providing near vision correction; and
one or more second regions on said body having a multiorder diffractive structure providing distance vision correction, in which said aperture of the lens is divided between said first and second regions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A bifocal multiorder diffractive lens comprising:
a lens body shaped to refract light to provide distance vision correction, and at least one multiorder diffractive structure for adding power to said lens for near vision correction. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31)
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32. A bifocal multiorder diffractive lens comprising:
a lens body having a multifocal diffractive structure for distance vision correction, and one or more refractive regions for adding power to said lens for near vision correction. - View Dependent Claims (33, 34, 35, 36, 37, 38)
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39. A multiorder diffractive optic comprising:
one or more multiorder diffractive structures in which each of said diffractive structures is in accordance with wavelengths for both photopic and scotopic vision. - View Dependent Claims (40)
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41. A multiorder diffractive optic comprising:
a lens body having two or more diffractive structures providing different optical powers in which each of said diffractive structures directs light in a plurality of different wavelengths to a single focus. - View Dependent Claims (42, 43, 44, 45, 46, 47, 48, 49)
Specification