Process of correction of the shift due to temperature of the optical power of an active lens of a phoropter and related phoropter and optometry system
US11944381B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 20, 2018 |
| Grant date | Apr 2, 2024 |
| Priority date | — |
| Expiry date | Oct 2, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/083
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A process, phoropter, and an optometry system, the process being for correction of the shift of the optical power of an active lens in a phoropter due to a temperature change over time, the active lens including a container filled with a liquid and having a deformable curvature membrane under the action of an actuator controlled by an optical power control command, the shift being that the active lens provides an actual optical power that is different from the expected optical power corresponding to the optical power control command. A temperature sensor is arranged in and/or on the phoropter to measure the temperature in the phoropter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.