Bifocal multiorder diffractive lenses for vision correction
First Claim
1. 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, in which said multiorder diffractive structure directs light in a plurality of different wavelengths in different diffractive orders to a single focus in accordance with said add power.
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Accused Products
Abstract
A bifocal multiorder diffractive lens 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. The lens body may be provided by a single optical element or multiple optical elements. 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. Multiorder diffractive structures may be optimized for photopic and scotopic vision.
132 Citations
37 Claims
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1. 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, in which said multiorder diffractive structure directs light in a plurality of different wavelengths in different diffractive orders to a single focus in accordance with said add power. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A bifocal multiorder diffractive lens comprising:
a lens body shaped to refract light to provide distance vision correction, and one or more multiorder diffractive structures for adding power to said lens for near vision correction, wherein one or more said diffractive structures is in accordance with wavelengths for both photopic and scotopic vision. - View Dependent Claims (14)
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15. A bifocal multiorder diffractive lens comprising:
a lens body having a multiorder diffractive structure for distance vision correction, and one or more refractive regions for adding power to said lens for near vision correction, in which said multiorder diffractive structure directs light in a plurality of different wavelengths in different diffractive orders to a single focus in accordance with said distance vision correction. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A bifocal multiorder diffractive lens comprising:
a lens body having a multiorder diffractive structure for distance vision correction, and one or more refractive regions for adding power to said lens for near vision correction, wherein said diffractive structure is in accordance with wavelengths for both photopic and scotopic vision. - View Dependent Claims (29)
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30. An optical element comprising:
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a lens body; at least one multiorder diffractive structure for directing light in a plurality of different wavelengths in different diffractive orders to a common focus in accordance with a first optical power; and said lens body having a refractive body or at least one refractive region providing a second optical power, in which said optical element is multifocal in accordance with said first and second optical powers. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37)
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Specification