Method of examining an optical component and arrangement therefor
CA 2001612 A1 · Owner: Carl-Zeiss-Stiftung, A Foundation Established Under The Laws Of Germany, Trading As Carl Zeiss · Inventors: Kuchel, Michael
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention is directed to a method for testing optical components and tests can be made on aspherical surfaces or more specifically, on aspherical wavefronts. For this purpose, the collimator of an interferometer which generates the test wave is displaced relative to the test component and interferograms are electronically registered by means of an image sensor in different positions of the collimator and are stored as light path length differences between the test beam and the comparison beam for the individual image points of each interferogram. The relative position between the collimator and the test component is additionally measured with high precision. Thereafter, the light path …
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 October 26, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 26, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 26, 2011.
- 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.