Optical fiber diffuser
CA 2375267 A1 · Owner: Photonics Research Ontario · Inventors: Tam, Robin Chi-Hung; Gu, Xijia
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Optical fiber diffusers for emitting light cylindrically along a length of the fiber diffuser (38) with preselected light intensity distributions along the length of the diffuser. The diffuser portion is defined by forming a distribution of scattering centers in a section of the optical fiber core (34) having a modulated index of refraction which acts to couple light radially out of the fiber along the diffuser section. The intensity distribution of light coupled out of the diffuser section of the fiber is controlled by controlling the profile of the modulated index of refraction namely the coupling , coefficient, along the length of the grating. Writing a grating into a multimode …
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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 June 16, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 16, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 16, 2022.
- 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.