Optical devices having a wavelength-tunable dispersion assembly that has a volume dispersive diffraction grating
CA 2422747 A1 · Owner: Goncharov, Alexander F. · Inventors: Struzhkin, Viktor V.; Goncharov, Alexander F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A spectrometer (20) has a source of illumination radiation (21) having a plurality of spectral wavelengths, a bandpass filter (14) a dispersive , beamsplitter (28), an illumination radiation rejection filter (34) and a , spectrograph (32) each tunable in correspondences to a selected one of the plurality of spectral wavelengths of the source of illumination radiation. Any one of the tunable elements can comprise a holographic volume dispersion distraction grating and a mirror, both having fixed orientation displacement with respect to each other and being rotable for tuning around an avis corresponding to the interaction of the two planes coincident with the surfaces of said mirror …
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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 July 26, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 26, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 26, 2023.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.