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. 29, 1997
Filed:
Mar. 06, 1996
Applicant:
Inventors:
Donald A Frederick, Woodland Hills, CA (US);
John F Cappi, Reseda, CA (US);
Assignee:
Litton Systems, Inc, Woodland Hills, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ; G01B / ; H04B / ;
U.S. Cl.
CPC ...
385 12 ; 385 13 ; 385100 ; 385115 ; 385116 ; 385123 ; 25022711 ; 25022714 ; 25022719 ; 356345 ; 356350 ; 367149 ;
Abstract
A fiber optic interferometric sensor for use in a hydrophone system at high pressures includes a reference fiber wrapped around a rigid inner cylinder. A solid layer of compliant material is applied over the reference fiber. The sensing arm of the interferometer is wound over the layer of material applied over the reference fiber. The outer material is sufficiently compliant to provide acoustic sensitivity comparable to that of air-backed hydrophones.