Apparatus for measuring the characteristics of an optical system
CA 1185809 A · Owner: Tokyo Kogaku Kikai Kabushiki Kaisha · Inventors: Tamaki, Hiroshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The disclosure describes an apparatus for measuring the optical characteristics of an optical system. It comprises a collimator for collimating a beam of light from a source of light means for selecting part of the light beam from the collimator means for holding an optical system to be tested between the collimotor and the selecting means, means for detecting the selected light beam from the selecting means, and means for operating the optical characteristics of the optical system to be tested on the basis of the results detected in the detecting means. The selecting means includes a beam selecting pattern comprising two groups of parallel linear lines, each of the groups consisting of at …
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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 April 23, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 23, 2002.
- 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.