Optical pyrometer and technique for temperature measurement
Pyrometer system using separated spectral components from a heat source Patent #: 4326798
ApplicationNo. 06/798214 filed on 11/14/1985
US Classes:356/45, Plural color responsive356/43, OPTICAL PYROMETERS374/127Having significant frequency limitation or relationship (e.g., peak, ratio)
ExaminersPrimary: LaRoche, Eugene R.
Assistant: Pascal, Robert
Attorney, Agent or Firm
International ClassG01J 5/60 (20060101)
AbstractA novel dual spectra optical pyrometer for use in in-flight control of jet engines includes an optical probe containing a shutter sensitive to the air pressure within the jet engine. The shutter provides an optical beam from rotating turbine blades to an optical fiber only above a threshold pressure. A serial array of photodetectors receives the optical beam and provides first and second signals therefrom. A signal processor receives the first and second signals as well as signals indicative of the energy ratio therebetween, and provides reflection corrected energy signals from the difference between the first signals and the product of the energy ratio signals and the second signals.