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:
Jan. 02, 1990
Filed:
Feb. 21, 1989
James M Naden, Dartford, GB;
STC PLC, London, GB;
Abstract
An optically addressed optical fiber sensor system in which light is employed to excite an optical fiber cantilever (6) into mechanical oscillation at a frequency f.sub.o. This oscillation modulates the amplitude of the light launched into the cantilever. The sensed parameter controls the displacement of the free end of the cantilever with respect to the end of the fiber (2) from which light is launched into the cantilever. The magnitude of this displacement affects the magnitudes of the components of modulated light at frequencies f.sub.o and 2f.sub.o. From an analysis of these components a measure of the displacement is obtained, and also a measure of the magnitude of the sensed parameter.