Method for inspecting an ophthalmic lens using optical coherence tomography
US10175178B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 18, 2017 |
| Grant date | Jan 8, 2019 |
| Priority date | — |
| Expiry date | Jul 18, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/9583
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for inspecting an ophthalmic lens, such as a contact lens, using Optical Coherence Tomography. The method includes illuminating a sample volume including the lens with a sample light beam which is provided from a light source having a power of at least 2 mW at a wavelength of 1040 nm to 1080 nm and which does not exceed 5 W. In carrying out the method an ophthalmic lens is inspected which has been manufactured such that it comprises scattering centers embedded in and/or on an anterior surface and in and/or on a posterior surface thereof, respectively, and/or distributed throughout a bulk material being delimited by the anterior surface and the posterior surface of the ophthalmic lens. An interference pattern resulting from a superposition of back-scattered light from the sample volume including the ophthalmic lens and a reference light beam provided from the light source may then be analyzed and evaluated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.