Fiber optical measurement apparatus
Patent 4281245 Issued on July 28, 1981. Estimated Expiration Date: 
May 29, 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.
May 29, 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 3709612 Color control system for optical image apparatus Color-sensitive photoelectric control system with fiber optics Patent #: 4045667 InventorsApplicationNo. 06/043031 filed on 05/29/1979US Classes:250/227.23, With spectral frequency/wavelength discrimination250/205Controlling light source intensityExaminersPrimary: Nelms, David C.Attorney, Agent or FirmInternational ClassesG01H 9/00 (20060101)G01P 15/093 (20060101) G01P 15/08 (20060101) G01D 5/26 (20060101) Foreign Application Priority Data1978-06-02 SEAbstractThe invention relates to an optical measuring device for measuring physical magnitudes such as position, speed, acceleration, force, pressure, elongation, temperature, etc., comprising at least one optical fiber for conducting light between an electronic unit and a transducer forming an optical modulator which is directly or indirectly influenced by the quantity being measured and, in dependence thereon, modulates the light emitted to the transducer. The transducer contains at least one optical filter having spectrally varying absorbing and/or transmitting and/or reflecting characteristics within the spectra of the emitted light. The light filter generates one or more stabilizing signals for the fiber optic and optoelectronics, and possibly one or more measurement signals within one or more wavelength ranges. | |
