Method and apparatus for illumination and imaging of a surface
CA 2190189 C · Owner: Sussmeier, John W. · Inventors: Zheng, Joe; Sussmeier, John W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for illumination and imaging of a surface includes an apparatus for illuminating the surface an apparatus for obtaining an image, of the illuminated surface and providing an output signal representative of the obtained image, and an apparatus for limiting the exposure time of the image-obtaining apparatus to a selected fast exposure time less than the video frame rate of the image-obtaining apparatus. The image-obtaining apparatus may be a CCD-based camera (40). The CCD-based camera and the illumination apparatus may be mounted in a shroud (20) having an opaque side wall. A first polarizing film (100) may be provided intermediate the illumination apparatus and the surface and a …
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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 February 18, 1994 and granted July 13, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 18, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 18, 2016.
- 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
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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.