Fiber optical temperature sensors
Patent 4278349 Issued on July 14, 1981. Estimated Expiration Date: 
June 22, 1999. 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.
June 22, 1999. 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 References 3910701 Optical temperature probe Optical temperature measurement technique utilizing phosphors Semiconductor temperature sensor Temperature sensing device Patent #: 4179927 InventorAssigneeApplicationNo. 06/051458 filed on 06/22/1979US Classes:356/44, With sample engaging rod or tube356/45, Plural color responsive374/121, By thermally emitted radiation374/162ColorExaminersPrimary: McGraw, Vincent P.Attorney, Agent or FirmInternational ClassesG01K 1/02 (20060101)G01K 1/00 (20060101) G01K 11/00 (20060101) G01K 11/12 (20060101) Foreign Application Priority Data1978-06-26 SEAbstractA fiber optical temperature measuring apparatus is based on the ability of certain materials to change color in dependence on changes in temperature. Visible or invisible light having at least two different wavelengths is supplied to the material and the light emanating from the material is detected for determining the changes in the absorption characteristic of the material at the emitted wavelengths by determining the quotient between the detected signals from the material. | |
