Electro-optical and magneto-optical sensing apparatus and method for characterizing free-space electromagnetic radiation
CA 2255762 C · Owner: Libelo, Louis Francis · Inventors: Zhang, Xi-Cheng; Riordan, Jennifer Ann; Libelo, Louis Francis
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Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Apparatus and method for characterizing free-space electromagnetic energy suitable for real-time two-dimensional far-infrared imaging applications. The sensing technique is based on a non-linear coupling between a low-frequency electric or magnetic field (12) and a laser beam (16) in an electro-optic or magnetic-optic crystal (14, 32 or 54). A counter-propagating sensing technique (Fig. 1), and a co-linear sensing technique (Figs. 4 and 13) are described for longer radiated and optical beam interaction length making imaging , applications practical.
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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.
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- Filed May 30, 1997 and granted June 25, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 30, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 30, 2019.
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