Invention Grant
- Patent Title: Method for inspecting an ophthalmic lens using optical coherence tomography
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Application No.: US15653070Application Date: 2017-07-18
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Publication No.: US10175178B2Publication Date: 2019-01-08
- Inventor: Thomas Tonn
- Applicant: Novartis AG
- Applicant Address: CH Basel
- Assignee: Novartis AG
- Current Assignee: Novartis AG
- Current Assignee Address: CH Basel
- Agent Robert A. Ambrose
- Main IPC: G01B9/02
- IPC: G01B9/02 ; G01M11/02 ; G01N21/88 ; G01N21/958

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.
Public/Granted literature
- US20180024077A1 METHOD FOR INSPECTING AN OPHTHALMIC LENS USING OPTICAL COHERENCE TOMOGRAPHY Public/Granted day:2018-01-25
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