Method for determining the configuration of an ophthalmic lens, ophthalmic lens produced according to said method, and method for producing said lens
US8240850B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Feb 5, 2009 |
| Grant date | Aug 14, 2012 |
| Priority date | — |
| Expiry date | Jun 24, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C2202/22
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The invention relates to a method for making an ophthalmic lens intended to correct the visual acuity of a user, comprising the steps of determining the shape of a base optical corrective element, determining the profile of a phase element structure, said determination comprising the steps of defining a desired depth of focus of said ophthalmic lens; calculating the phase distribution to be created at the entrance pupil of the lens, selecting a phase distribution and performing an iterative calculation to obtain the depth of focus, finding the phase which minimizes the differences between the effective phase distribution and the desired phase distribution and of converting the phase data into geometrical data to define the profile of the phase distribution structure and juxtaposing the resulting phase element structure and the base optical corrective element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.