Device for calibrating of an optical instrument and related applications
CA 2033045 C · Owner: Centre National D'Etudes Spatiales · Inventors: Deshayes, Jean-Pierre
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention involves the calibration of an optical instrument. To use a light source to calibrate an optical instrument for radiometric analysis whose focal plane contains photoelectric detectors that convert the image illumination into an electrical signal the light source (3) is placed at the entrance pupil (2) or in the aperture (diaphragm) of the instrument. The invention has a specific application in the calibration of an optical instrument on board a satellite.
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 December 21, 1990 and granted January 12, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 21, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 21, 2012.
- 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.