Compensating for time varying phase changes in interferometric measurements
CA 2590790 C · Owner: Froggatt, Mark · Inventors: Gifford, Dawn K.; Froggatt, Mark
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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An optical device under test (DUT) is interferometrically measured. The DUT can include one or more of an optical fiber an optical component, or an , optical system. First interference pattern data for the DUT is obtained for a first path to the DUT, and second interference pattern data for the DUT is obtained for a second somewhat longer path to the DUT. Because of that longer length, the second interference pattern data is delayed in time from the first interference pattern data. A time varying component of the DUT interference pattern data is then identified from the first and second interference pattern data. The identified time varying component is used to modify the first or …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed December 13, 2005 and granted September 2, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 13, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
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