Adaptive focal plane for high contrast imaging
CA 2255170 C · Owner: Northrop Grumman Space & Mission Systems Corp. · Inventors: Livingston, Peter M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A high contrast imaging system (10) having an adaptive focal plane (52). The system (10) includes receiver optics (32) that receive radiation (30) from both a detected target (16) and a laser beam (14) incident thereon and a polarizing beam splitter (44) that splits the radiation into a first beam of reflected laser radiation and a second beam of radiation (46). The polarizing beam splitter (44) linearly polarizes the second beam of detected target radiation (46). A beam polarizer (48) circularly polarizes the second beam of detected target radiation (46). An adaptive focal plane or micromirror array (52) reflects the circularly polarized detected target radiation back through the beam …
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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
- Filed December 2, 1998 and granted February 5, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 2, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 2, 2020.
- 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.