The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 25, 2003
Filed:
Nov. 28, 2000
Toshifumi Ohsawa, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An angular velocity detecting apparatus comprises a ring laser including a tapered light waveguide of an asymmetrical shape in at least a portion of a light waveguide so that the oscillation threshold values of laser beams propagating round in opposite directions of rotation may differ from each other, an optical gyro having a terminal for detecting any change in at least one of an electric current, a voltage and impedance in the ring laser, a measuring device for measuring the information of the cycle of the change in at least one of the electric current, the voltage and the impedance outputted from the terminal of the gyro, a clock generation device for generating a predetermined clock for sampling, and a calculation circuit for inputting the result of the measurement by the measuring device at a predetermined sampling cycle, and calculating information regarding an angular velocity on the basis of the result of the measurement. The predetermined sampling cycle generated by the clock generation device is longer than the cycle of the change in at least one of the electric current, the voltage and the impedance produced by the optical gyro within the necessary range for the detection of the angular velocity.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile