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 first region having a first refractive optical power and comprising (1) a first base curvature having a finite first radius of curvature and (2) a multifocal phase plate having a first diffraction order with a first diffractive optical power, the first region configured for forming a first focus and a second focus; and
a second region having a second refractive optical power and comprising (1) a second base curvature having a finite second radius of curvature different from the first radius of curvature and (2) a monofocal phase plate having a first diffraction order with the second diffractive optical power, the second region configured for forming a third focus.
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Abstract
An ophthalmic lens for providing a plurality of foci has an optic comprising an anterior surface, a posterior surface, and an optical axis. The optic has a first region and a second region. The first region has a refractive optical power and comprises a multifocal phase plate for forming a first focus and a second focus. The second region has a refractive optical power and comprises a monofocal phase plate for forming a third focus. The multifocal phase plate and the monofocal phase plate may be disposed on first and second base curvatures, respectively, that may have different radii of curvature. The ophthalmic lens may also have an intermediate phase plate located between the multifocal phase plate and the monofocal phase plate, the intermediate phase plate comprising a third plurality of echelettes disposed on a third base curvature having a third radius of curvature.
222 Citations
33 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 first region having a first refractive optical power and comprising (1) a first base curvature having a finite first radius of curvature and (2) a multifocal phase plate having a first diffraction order with a first diffractive optical power, the first region configured for forming a first focus and a second focus; and
a second region having a second refractive optical power and comprising (1) a second base curvature having a finite second radius of curvature different from the first radius of curvature and (2) a monofocal phase plate having a first diffraction order with the second diffractive optical power, the second region configured for forming a third focus. - 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, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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Specification