Apparatus for measuring properties of a laser emission
CA 1295048 C · Owner: Shih, I-Fu · Inventors: Tzeng, Robert; Shih, I-Fu; Pollack, Slava A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of Disclosure, Apparatus is provided for measuring the numerical aperture of an optical fiber in the infrared region. The optical fiber is appropriately mounted in accordance with conventional testing standards. Infrared energy is transmitted through the optical fiber. At a predetermined distance from the end of the optical fiber, a conversion screen can be provided for transforming the emitted infrared energy into a lesser wavelength of energy. The energy distribution can be recorded with a detector compatible with the lesser wavelength energy whereby the numerical aperture can be computed from the recorded data.
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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
- Granted January 28, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 28, 2009.
- 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.