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:
Jul. 21, 1992
Filed:
Dec. 06, 1991
Malcolm P Varnham, Stevenage, GB;
British Aerospace Public Limited Company, London, GB;
Abstract
A fibre optic gyroscope which reduces the sensitivity of the gyroscope to offsets in the demodulator, the reduction in sensitivity being achieved by modulating the radiation passing through the gyroscope by a first waveform which is derived from second and third periodic waveforms, the third waveform having a frequency substantially less than that of the second waveform in use and the second waveform having a frequency of about 1/2T where T is the time taken for the radiation to travel through the gyroscope, and detecting said radiation which is subsequently demodulated with respect to both second and third waveforms in order to minimize any offset introduced by the demodulation with respect to the second waveform.