Device and method for controlling the contrast in an image observation system provided with an mcp image intensifier
CA 2082148 A1 · Owner: Schelen, Johannes Bernardus Jozef · Inventors: Van Den Berg, Jacob; Schelen, Johannes Bernardus Jozef
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An image observation system comprises an image intensifier provided with an MCP. It further comprises an image converter to convert the output image of the image intensifier into a video signal or a visible image. When the contrast range in the image formed by the image converter is large the voltage applied across the MCP is increased and the gain of the image converter is reduced. When the contrast range in the image formed by the image converter is small the voltage applied across the MCP is reduced and the gain of the image converter is increased. In this way the contrast in the image is controlled by the darker portions of the observed scene instead of by the brighter portions.
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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 April 17, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 17, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 17, 2013.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.