Optical pressure sensor
Patent 6567173 Issued on May 20, 2003. Estimated Expiration Date: 
August 22, 2020. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
August 22, 2020. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesFabry-Perot optical sensing device for measuring a physical parameter Method for producing hydrocarbon gas from waste Patent #: 5395405 InventorAssigneeApplicationNo. 622715 filed on 08/22/2000US Classes:356/480Resonant cavityExaminersPrimary: Turner, Samuel A.Assistant: Connolly, Patrick Attorney, Agent or FirmInternational ClassG07B 009/02Foreign Application Priority Data1998-03-06 NOAbstractAn optical pressure sensor includes an optical fiber having a well defined end part and a casing having a cylindrically shaped cavity with an inner diameter that is essentially the same as the outer diameter of fiber. The end of the optical fiber is positioned at a chosen axial position inside the cavity, thereby closing one end of the cavity. A body is positioned in the cavity and has a first, at least partially, reflective surface. The partially reflective surface, fiber, and casing define a chamber. The chamber contains a compressible fluid. At least one of the body and the optical fiber is movably connected to the casing in the axial direction thus to provide a pressure coupling between the chamber and the environment. | |
