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:
Apr. 14, 1992
Filed:
Feb. 05, 1990
Jeffrey C Gremillion, Salem, CT (US);
The United States of America as represented by the Secretary of the Navy, Washington, DC (US);
Abstract
An apparatus for reducing the detected optical intensity noise received f an optical interferometric sensor. One embodiment of the device comprises high pass and low pass filtering means and an arithmetic divider device, arranged so as to receive a single signal S.sub.1 and to cancel unwanted intensity noise in signal S.sub.1 prior to the transmittal of the noise free signal S.sub.out to a receiver circuit. A second embodiment of the device further includes an adder and a subtractor to receive two signals S.sub.1 and S.sub.2. The adder and subtractor are cross connected in such a way as to combine the two signals for further processing and also to still permit intensity noise cancellation in the event one of the signals is not available.