M x n optical matrix switch
CA 2355918 C · Owner: Ao, Eric Rong · Inventors: Ao, Eric Rong
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An M x N optical switch in which the focal lengths of the collimating lenses are adjusted, so that the waists of the Gaussian beams exiting the collimating lenses are focused on, reflecting elements, which are positioned along a diagonal of the array of reflecting, elements. This arrangement increases the number of beams that are symmetrical about, the waist position, which increases the coupling efficiency. The best possible arrangement occurs when all of the waists are equal in diameter thereby , ensuring that for, every output port the distances from the waists to the focusing lens are identical.
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 August 23, 2001 and granted March 18, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 23, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 23, 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.