Method and device for hyperacute detection of an essentially rectilinear contrast edge and system for fine following and fixing of said contrast edge
CA 2563584 C · Owner: Viollet, Stephane · Inventors: Franceschini, Nicolas; Boyron, Marc; Viollet, Stephane
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a method and a device for the detection of an essentially rectilinear contrast edge (E) in a direction whereby a periodic sweep (.OMEGA.) of the global visual angle (.DELTA..psi.) of the optical sensors (D1 D2), by translation (S) in another direction transverse to the first direction is carried out. Said translation provides a periodic sweep of non-uniform angular speed (.OMEGA.) during a part of the period of sweeping and a measurement of a time difference (t) from the signals provided by the sensors (D1 D2), depending on the angular position of the contrast edge (E) with relation to a reference direction (OY12) within the global visual angle (.DELTA..psi.) from …
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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 March 16, 2005 and granted July 30, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 16, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.