Light condensing and collecting systems using lensed light pipes
CA 2422705 A1 · Owner: Li, Kenneth K. · Inventors: Li, Kenneth K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An optical coupling element for use in large numerical aperture collecting and condensing systems. The optical coupling element includes a lens (503) having a curved surface and a tapered light pipe (504). The curved surface reduces the angle of incidence of the light striking the input end of the optical coupling element such that the Fresnel reflection is greatly reduced. Electromagnetic radiation emitted by a source (506) is collected and focused onto a target by positioning the source of electromagnetic radiation at a first focal point of a first reflector (508a) so that the source produces rays of radiation reflected from the first reflector that converge at a second focal …
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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 September 20, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 20, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 20, 2023.
- 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.