Method for measurement of three-dimensional objects by single-view backlit shadowgraphy
CA 2518702 C · Owner: Commissariat A L'Energie Atomique · Inventors: Pascal, Ghislain; Voisin, Yvon; Diou, Alain
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 for measurement of three-dimensional objects by single-view backlit shadowgraphy. According to the invention at least one geometrical parameter of such an object (32) for example, the thickness of a hollow sphere translucent or transparent to a visible light may be measured, by determination of the optical characteristics of the object by means of which at least one optical model for the propagation of light through the object can be established said model comprising at least one equation relating said parameter to the result of an observation made directly on an image of the object. Said image is produced by observation of the object with single-view …
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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 10, 2004 and granted June 4, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 10, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 10, 2026.
- 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.