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:
May. 06, 2003
Filed:
Jan. 21, 2000
Applicant:
Inventor:
Takahiro Numai, Kanagawa-ken, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01C 1/964 ;
U.S. Cl.
CPC ...
G01C 1/964 ;
Abstract
A gyro comprises a first laser adapted to generate a first laser beam propagating in a single direction as a main mode of operation, and a second laser adapted to generate a second laser beam propagating in a single direction as a main mode of operation. The gyro may have a beat signal detection means and a photodetector for receiving the first and second laser beams. The first laser beam and the second laser beam have different respective oscillation frequencies and interfere with each other.