Ellipsometer
CA 2278981 A1 · Owner: Kourilovitch, Andrei · Inventors: Kourilovitch, Andrei
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Field of the invention, Present invention relates to an ellipsometer a device which senses the , polarization state of monochromatic light. The device measures all the parameters of the polarization state, of light: the degree-of-polarization azimuth angle and ellipticity. Since , there are no moving parts, the measurement is faster and it is much lower in cost. Therefore, this type, of ellipsometer can be used for popular applications. Description of the prior art There are many optic solutions for sensing the polarization state of light. All of them utilize, one or more polarizers one or more waveplates and one or more photodetectors. To, obtain the three parameters describing the …
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 July 23, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 23, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 23, 2021.
- 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.