TWO-CHANNEL SPECTRAL RATIO PYROMETER Russian patent published in 2006 - IPC G01J5/60 

FIELD: measuring technique.

SUBSTANCE: two-channel spectral ration pyrometer comprises two photodetectors. The first photodetector is made of a filter that transmits radiation with a wavelength more than 800 nm. The second photodetector is mounted behind the first one so that it receives radiation that is passed through the first photodetector. In front of the first photodetector is the light filter that absorbs radiation in the visible spectral band, e.g., wavelengths from 300 to 600 nm, and transmits radiation in the long wavelength band. The filters and photodetectors are arranged at the optical axis of the lens.

EFFECT: enhanced accuracy of measurements.

3 dwg