Machine vision surface characterization system
CA 2089079 C · Owner: Czubko, Brian J. · Inventors: Czubko, Brian J.; Parker, Jeffrey B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention is a surface inspection system including a light source (111) having a sharp edge between dark and bright and a video camera (121) imaging this edge reflected from the surface. The light intensity of the light source (111) is controlled using a light intensity sensor (115). An optical system (123) focusses an image of the light source (111) at the video camera with sufficient depth of focus to include the surface (10) to be inspected. The exposure duration is set to prevent blurring if the surface is moving. A surface quality computation apparatus computes at least one measure of surface quality, such as gloss distinctness, of reflected image and orange peel of the …
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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 August 9, 1991 and granted May 8, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 9, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 9, 2013.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.