Planar waveguide film structure for an integrated optical system
CA 1237306 A · Owner: Ant Nachrichtentechnik G.M.B.H. · Inventors: Unger, Hans-Georg; Jacob, Jorn
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Planar waveguide film structure for an integrated optical system, composed of: a carrier substrate having a first index of refraction ns; a film having a selected thickness D and a second index of refraction nF greater than the first index of refraction applied onto the substrate for substantially guiding light waves; and a localized optically effective coating applied to the film the, coating having an index of refraction nA and a thickness d such that the following conditions apply: 0.05 D < d < 1.00 D, nS < nF < nA . - 1 -
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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
- Granted May 31, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 31, 2005.
- 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.