Optical lens design for flattening a through-focus curve

Patent metadata

Field	Value
Publication number	US-11822153-B2
Application number	US-202017034017-A
Country	US
Kind code	B2
Filing date	Sep 28, 2020
Priority date	Sep 28, 2020
Publication date	Nov 21, 2023
Grant date	Nov 21, 2023

Abstract

Described herein are systems and/or methods for forming an ophthalmic lens. An example method may comprise a step of determining a power profile based on a power profile function defined by a base optical power, an amount of spherical aberration at a radial distance from a geometric center of the lens, and a bump function. The example method may comprise a step of adjusting the power profile based at least on minimizing a shape metric of a through-focus curve.

First claim

What is claimed is:

1. An ophthalmic lens formed by a method comprising:
determining a power profile based on a power profile function defined by a base optical power, an amount of spherical aberration at a radial distance from a geometric center of a lens, and a bump function;
adjusting the power profile based at least on minimizing a shape metric comprising a through-focus flatness (TFF) metric of a through-focus curve; and
forming the lens to exhibit the adjusted power profile.

2. The lens of claim 1 , wherein forming a lens comprises configuring the geometric shape of the lens.

3. The lens of claim 1 , wherein the spherical aberration, and parameters of the bump function are configured to vary by refractive prescription.

4. The lens of claim 1 , wherein the spherical aberration, and parameters of the bump function are configured based on a characteristic of a target population.

5. The lens of claim 4 , wherein the characteristic is at least one of a pupil size or a vergence variance.

6. The lens of claim 1 , wherein the spherical aberration, and parameters of the bump function are configured based on pupil size and vergence variances for a specific prescription or target population.

7. The lens of claim 1 , wherein forming a lens comprises configuring an internal gradient refractive index profile of the lens.

8. The lens of claim 1 , wherein forming a lens comprises configuring a geometric shape of the lens and an internal gradient refractive index profile of the lens.

9. The lens of claim 1 , wherein forming a lens comprises configuring a main body of the lens such that a light propagating through the lens is refracted to exhibit the adjusted power profile.

10. The lens of claim 1 , wherein forming a lens further comprises configuring a main body of the lens such that at least an intensity of light propagating through the lens is changed to exhibit a target apodization profile.

11. The lens of claim 10 , wherein the intensity of light propagating through the lens is changed by apodizing the lens.

12. The lens of claim 11 , wherein the apodizing the lens is based on a transmittance profile defined by a continuous function, with a non-monotonically varying transmittance.

13. The lens of claim 12 , wherein a maximum of transmittance is at a pupil center and a minimum value is positioned less than an optical zone (OZ) radius.

14. The lens of claim 13 , wherein the transmittance is based on a polynomial function.

15. The lens of claim 12 , wherein a shape of the transmittance profile relative to a radial position on the lens is defined by a decrease from the center to a middle point and then an increase to a peripheral point.

16. The lens of claim 1 , wherein the TFF is defined by

TFF
=

∫

v

t
-
δ

v

t
+
δ

⁢



df
⁡

(
v
)

dv



⁢

dv
.

17. An ophthalmic lens comprising:
a main body configured to exhibit a power profile based on a power profile function defined by a base optical power, an amount of spherical aberration at a radial distance from a geometric center of a lens, and a bump function,
wherein the power profile is optimized based at least on minimizing a shape metric comprising a through-focus flatness (TFF) metric of a through-focus curve.

18. The lens of claim 17 , wherein the bump function comprises a multifocal function.

19. The lens of claim 17 , wherein the spherical aberration, and parameters of the bump function are configured to vary by refractive prescription.

20. The lens of claim 17 , wherein the spherical aberration, and parameters of the bump function are configured based on pupil size and vergence variances for a specific prescription or target population.

21. The lens of claim 17 , wherein the main body is configured by configuring a geometric shape of the lens.

22. The lens of claim 17 , wherein the main body is configured by configuring an internal gradient refractive index profile of the lens.

23. The lens of claim 17 , wherein the main body is configured by configuring a geometric shape of the lens and an internal gradient refractive index profile of the lens.

24. The lens of claim 17 , wherein the main body is configured such that a light propagating through the lens is refracted to exhibit the power profile.

25. The lens of claim 17 , wherein the main body is configured such that at least an intensity of light propagating through the lens is changed to exhibit a target apodization profile.

26. The lens of claim 25 , wherein the intensity of light propagating through the lens is changed by apodizing the lens.

27. The lens of claim 26 , wherein the apodizing the lens is based on a transmittance profile defined by a continuous function, with a non-monotonically varying transmittance.

28. The lens of claim 27 , wherein a maximum of transmittance is at a pupil center and a minimum value is positioned less than an optical zone (OZ) radius.

29. The lens of claim 28 , wherein the transmittance is based on a polynomial function.

30. The lens of claim 27 , wherein a shape of the transmittance profile relative to a radial position on the lens is defined by a decrease from the center to a middle point and then an increase to a peripheral point.

31. The lens of claim 17 , wherein the TFF is defined by

TFF
=

∫

v

t
-
δ

v

t
+
δ

⁢



df
⁡

(
v
)

dv



⁢

Assignees

• Johnson & Johnson Vision Care

Inventors

• Wei Xin
• Jubin Philippe F
• Nankivil Derek
• Chen Minghan
• Williby Gregory

Classifications

• G02C7/105

  having inhomogeneously distributed colouring · CPC title

• G02C7/06 Primary

  bifocal; multifocal {; progressive (G02C7/041 takes precedence)} · CPC title

• G02C7/047 Primary

  Contact lens fitting; Contact lenses for orthokeratology; Contact lenses for specially shaped corneae · CPC title

• G02C7/027

  considering wearer's parameters · CPC title

• G02C7/028 Primary

  Special mathematical design techniques · CPC title