Laser gyro with phased dithered mirrors
CA 1180795 B · Owner: Litton Systems, Inc. · Inventors: Hutchings, Thomas J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed herein is a ring laser gyroscope having two oppositely traveling laser beams and is provided with mechanically dithered mirrors at its three or four reflection points. At least two of the mirrors are mounted for movement in and out as the result of the expansion and contraction of stacks of piezoelectric elements associated with these mirrors. These mirrors are thus dithered i.e. oscillated in and out, in phased relationship with one another so that the total length of the laser cavity is held at a fixed number of wavelengths, but the laser beam translates back and forth across the surfaces of the mirrors. By this technique the undesired, phenomenon of lock-in at low rotation …
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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
- Granted September 2, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 2, 1997.
- 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.