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. 05, 1988
Filed:
Oct. 07, 1985
Richard F Cahill, El Toro, CA (US);
Eric Udd, Huntington Beach, CA (US);
McDonnell Douglas Corporation, Long Beach, CA (US);
Abstract
There is provided by this invention a fiber optic transducer for accelerometers and gyroscopes that utilize an optical fiber suspended between two points and supported on a vibrating platform such that the optical fiber is deflected to cause light passing through the fiber to be phase modulated. When the device is accelerated, the deflection of the vibrating fiber is assymetrical, and the light passing through the fiber is phase modulated at frequency `f` and odd harmonics of `f`. The first in odd harmonic phase modulation has an amplitude proportional to the acceleration and a phase relative to the driving signal that depends on the direction of acceleration.