OPHTHALMIC LENS WITH MULTIPLE PHASE PLATES
First Claim
1. An ophthalmic lens, comprising:
- an optic having an anterior surface, a posterior surface, and an optical axis;
a central phase plate configured such that the lens is able to direct light to a first focus and a second focus corresponding different diffraction orders of the phase plate, the central phase plate comprising a first base curvature having a first radius of curvature;
an intermediate phase plate surrounding the central phase plate configured to change the overall resultant distribution of light directed to the second focus; and
an outer refractive region having no diffractive optical power surrounding the intermediate phase plate and configured to direct light to the second focus, the outer refractive region having an aspheric shape configured to reduce an optical aberration.
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Accused Products
Abstract
An ophthalmic lens for providing a plurality of foci has an optic including an anterior surface, a posterior surface, and an optical axis. The ophthalmic lens further includes a central phase plate, an intermediate phase plate surrounding the central phase plate, and an outer refractive region. The central phase plate comprises a first base curvature having a first radius of curvature and is configured such that the lens is able to direct light to a first focus and a second focus corresponding different diffraction orders of the phase plate. The intermediate phase plate is configured to change the overall resultant distribution of light directed to the second focus. The outer refractive region has no diffractive optical power and surrounds the intermediate phase plate. The outer refractive region is configured to direct light to the second focus and has an aspheric shape configured to reduce an optical aberration.
65 Citations
13 Claims
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1. An ophthalmic lens, comprising:
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an optic having an anterior surface, a posterior surface, and an optical axis; a central phase plate configured such that the lens is able to direct light to a first focus and a second focus corresponding different diffraction orders of the phase plate, the central phase plate comprising a first base curvature having a first radius of curvature; an intermediate phase plate surrounding the central phase plate configured to change the overall resultant distribution of light directed to the second focus; and an outer refractive region having no diffractive optical power surrounding the intermediate phase plate and configured to direct light to the second focus, the outer refractive region having an aspheric shape configured to reduce an optical aberration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification