Bifocal multiorder diffractive lenses for vision correction
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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
64 Claims
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1-38. -38. (cancelled)
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39. A multiorder diffractive optical element 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, 41, 42, 43, 44, 45, 46, 55, 56, 57, 58, 59, 60, 61, 62, 63)
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47. A multiorder diffractive lens comprising:
at least one multiorder diffractive structure which directs light of a plurality of different wavelengths to a single focus which is optimized for photopic and scotopic vision. - View Dependent Claims (48, 49, 50, 51, 52, 53, 54)
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64. A multiorder diffractive lens comprising:
two or more multiorder diffractive structures of different optical power, in which at least one of said diffractive structures directs light of a plurality of different wavelengths to a single focus which is optimized for at least one of photopic and scotopic vision.
Specification