System for scanning a surgical laser beam
CA 2069895 C · Owner: Phoenix Laser Systems, Inc. · Inventors: Knopp, Carl F.; Fountain, William D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a laser beam delivery system for a surgical laser beam steering and , scanning of the laser beam along the target (20) in transverse (X and Y) directions is accomplished in a mechanically simple and fast-responding manner. Closely adjacent to the objective lens assembly (24) of the delivery system is a pair of prisms (12 14), i:e. Risley prism Ar Herschel prism; positioned on the axis (16) of the approaching laser beam (18). The two prisms are mounted on separate rotating stages whereby they may be individually rotated about the beam axis. Co-rotation of the prisms produces circular scans, in diameters depending on the angle between the prisms. Counter rotation of the prisms at equal …
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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 August 8, 1991 and granted September 17, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 8, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 8, 2013.
- 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.