Optical fiber to rod lens joining method and interface structure
CA 2062804 A1 · Owner: Swann, Thomas A. · Inventors: Swann, Thomas A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In order to make possible the provision of a good fusion joint with low optical losses between an optical fiber and a graded index (GRIN) glass rod lens with considerably larger diameter the end, of the GRIN lens to which the optical fiber is to be joined is tapered down radially the extent of at least one third the radius of the cylindrical lens at a considerably oblique angle. It is then possible to make a mechanically good fused joint with low transmission losses in the mid portion of the reduced-diameter end of the lens by heating the butt joint with an electric arc. The taper may be frusto-conical, convex or concave.
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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 July 2, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 2, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 2, 2012.
- 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.