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US 11,892,713 B2Granted
Ophthalmic lens having morphed sinusoidal phase shift structures
AssigneeAlcon Inc.
InventorsXin Hong, William Andrew Maxwell, Xin Wei
Life of this patent
Estimating the term…
Abstract
An ophthalmic lens includes an optic comprising an anterior surface, a posterior surface, and an optical axis. At least one of the anterior surface and the posterior surface has a surface profile including a base curvature and a plurality of morphed sinusoidal phase shift structures. The base curvature may correspond to a base optical power of the ophthalmic lens, and the morphed sinusoidal phase shift structures may be configured to extend depth of focus of the ophthalmic lens at intermediate or near viewing distances.
Claims10
An ophthalmic lens, comprising
- an optic comprising an anterior surface, a posterior surface, and an optical axis, at least one of the anterior surface and the posterior surface having a surface profile including:
- a base curvature;
- and
- a morphed sinusoidal phase shift structure modifying the base curvature along a portion of the surface profile, wherein the morphed sinusoidal phase shift structure comprises a plurality of morphed sinusoidal phase shift zones, wherein each of the plurality of morphed sinusoidal phase shift zones comprises a single sinusoidal period;
- wherein the surface profile is defined as:
- Zoptic(r)=Zbase(r)+ZMSPS(r)
- wherein Zbase(r) defines the base curvature that is aspheric;
- and
- ZMSPS(r) defines the plurality of morphed sinusoidal phase shift zones;
- Z
- MPSS
-
- (
- r
- )
- =
- M
- i
-
- T
- i
- P
- π
-
- (
- 1
- -
- cos
-
- (
- r
- -
- R
- i
- T
- i
- P
-
- π
- )
- )
- ,
- R
- i
- ≤
- r
- <
- R
- i
- +
- T
- i
- P
- Z
- MPSS
-
- (
- r
- )
- =
- M
- i
-
- T
- i
- P
- π
-
- (
- 1
- -
- cos
-
- (
- r
- -
- R
- i
- -
- T
- i
- P
- R
- i
- +
- 1
- -
- R
- i
- -
- T
- i
- P
-
- π
- +
- π
- )
- )
- ,
-
- R
- i
- +
- T
- i
- P
- ≤
- r
- <
- R
- i
- +
- 1
- and:
- r denotes a radial distance from the optical axis in units of (mm);
- Ri and Ri+1 are starting and ending radial positions from the optical axis of each zone in units of (mm);
- Mi are step heights of each zone in units of (μm);
- TiP are critical points corresponding to a radial distance of a peak of each zone from the starting radial position of the zone;
- and
- i indicates zone numbers i=0, 1, 2, 3 . . . , consecutively from the optical axis.
118 more elements
Dependencies are inferred from the claim text.