Fiberoptic temperature transducer
Patent 5295206 Issued on March 15, 1994. Estimated Expiration Date: 
October 5, 2012. 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.
October 5, 2012. 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 ReferencesFiber-optic thermometer Fiberoptic temperature/pressure sensor system Patent #: 4672199 InventorAssigneeApplicationNo. 956678 filed on 10/05/1992US Classes:385/12, OPTICAL WAVEGUIDE SENSOR250/231.1, Actuated by dynamic external physical quantity374/55, Expansion or contraction characteristics (e.g., dilatometry)374/130, Optical system structure (e.g., lens)374/131, With radiation conducting element385/15WITH OPTICAL COUPLERExaminersPrimary: Lee, John D.Assistant: Ngo, John Attorney, Agent or FirmInternational ClassG02B 006/02AbstractA temperature measuring system that utilizes an electronic control unit and a rod made of a first material with a first thermal coefficient of expansion, the rod being attached at one end within a tubular device made of a material having a second coefficient of expansion. A reflecting surface is on the outer end of the rod of first material. At least one optical fiber is associated with the tubular member and is located so as to create a gap between the optical fiber and the reflecting surface. The first and second materials are chosen based upon their respective coefficients of thermal expansion such that a change in temperature of both materials will cause the length of the gap to either increase or decrease, thereby causing a change in the amount of light that is reflected and detected by the optical fibers.Field of SearchWith light chopping or modulationActuated by dynamic external physical quantity With radiation conducting element Optical system structure (e.g., lens) Expansion or contraction characteristics (e.g., dilatometry) OPTICAL WAVEGUIDE SENSOR Including physical deformation or movement of waveguide Reflective-type switch MISCELLANEOUS WITH OPTICAL COUPLER Particular coupling structure Multiport coupler using reflective surface | |
