Optical module and method of forming the optical module
CA 2405646 A1 · Owner: Hamanaka, Kenjiro · Inventors: Hamanaka, Kenjiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An object beam divided by a light division means 12 is caused to enter an optical fiber 23 and the object beam emitted from the optical fiber 23 is then caused to enter a photo-refractive polymer layer 6. On the other hand, a reference beam divided by the light division means 12 is irradiated on the photo-refractive polymer layer 6 from the opposite side. In this manner, the object beam is superimposed on the reference beam in the photo-refractive polymer layer 6 to form an interference pattern or fringe corresponding to the strength of the light intensity. The interference pattern is recorded on the photo-refractive polymer layer 6 as a diffraction grating 4. This diffraction grating 4 …
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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 27, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 27, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 27, 2024.
- 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.