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. 24, 1989
Filed:
Sep. 03, 1987
Thomas J Poorman, Houston, TX (US);
Western Atlas International, Inc., Houston, TX (US);
Abstract
The invention is an optical fiber sensor system in which an optical source, such as a laser diode, emits a pulse of optical energy which is transmitted in an optical path through an optical energy modulator. A partial reflector, included in the optical path before the optical modulator, reflects a portion of the optical energy of the pulse. The optical path terminates in an optical reflector, where the pulse is reflected back through the optical modulator to the partial reflector. The optical energy reflected by the partial reflector and the terminating reflector travels along the same optical path from the partial reflector to a photodetector and demodulator, where the magnitude of the parameter modulating the light modulator is determined from the relative magnitude of the energy reflected from the partial reflector and the terminating reflector.