Light source-optical fiber coupler
CA 2365141 A1 · Owner: Koshi, Hiroshi · Inventors: Koshi, Hiroshi; Sasaki, Yasuji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A light source-optical fiber coupler constituted by: a light source (such as a semiconductor laser chip 10); and a gradient index rod lens 14 for coupling diffuse luminous flux emitted from the light source to an end surface of an optical fiber (such as a single mode optical fiber 16) . The gradient index rod lens has a light source side end surface shaped like a convex spherical surface, and an optical fiber side end surface shaped like a flat surface. The gradient index rod lens is retained by the housing in the condition that the light source (laser chip) and the gradient index rod lens are disposed close to each other. The distance between a surface of the laser chip and an end surface …
Read the whole patent
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 December 10, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 10, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 10, 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.