Wide strip diode laser employing a lens
CA 2079504 C · Owner: Sizer, Theodore Ii · Inventors: Sizer, Theodore Ii
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved diode laser is attained by augmenting the conventional diode laser structure with a cylindrical lens that arrests the divergence of the beam in the spatial direction where it is rapidly diverging. To properly arrest the divergence of the beam and to thereby circularize it the cylindrical lens is placed at a point in space where the size of the laser beam in the two orthogonal spatial directions is substantially the same. With proper selection of the lens' focal length the nearly, circular cross section of the light is maintained as it travels away from the diode laser. The diode laser is further improved by making the diode structure facet that is closest to the lens highly …
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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 30, 1992 and granted October 14, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 30, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 30, 2014.
- 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.