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:
Jun. 17, 1986
Filed:
Aug. 26, 1983
Applicant:
Inventor:
John A Geen, Berkshire, GB;
Assignee:
British Aerospace Public Limited Company, London, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01C / ;
U.S. Cl.
CPC ...
356350 ;
Abstract
Detection means comprise at least three photodiodes 1, 2 and 3 which are spaced so as to expand to half a wavelength of an interference waveform produced in a ring laser gyroscope. The three photodiodes 1, 2 and 3 produce respective currents A, B and C the magnitudes of which are detected to sense the magnitude and direction of the movement of the interference waveform. The currents A, B and C are fed to a current mirror configured as a Norton amplifier input state 4, the latter producing signals which are fed to logic circuitry for obtaining signals representative of the rate and direction of the movement of the interference waveform.