Methods and apparatus for detecting surface defects of an optical fiber
CA 2288765 A1 · Owner: Bighouse, Roger D. · Inventors: Reding, Bruce W.; Bighouse, Roger D.; Pastel, David A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Detectors detecting flashes caused by the escape of light from the surface of an optical fiber as it rapidly passes a detection point suitable for use in online detection of optical fiber flaws. A detector includes a plurality of view systems, each view system consisting of a spherical mirror (608) a plurality , of lenses and a detector (616). Each spherical mirror (608) is placed at its radius of curvature from an optical fiber (618) to be tested for flaws. A first lens (610) of each view system is placed at its focal length away from the optical fiber (618), opposite the mirror. A second lens (612) of each view system is placed opposite the first lens (610). The detector (616) is …
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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 May 12, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 12, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 12, 2020.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.