Determination of the effective wavelength of non-monochromatic photodetectors in spectral-brightness pyrometry

A possibility of using non-monochromatic photodetectors registering radiation in a wide range of wavelengths as sensors of the brightness channel in spectral-brightness pyrometry is considered. A definition of the effective wavelength for a pyrometer is introduced based on a dependence of the registered signal on the temperature of thermal radiation source. Experimental results on determining the effective wavelength of the photodetector with the sensitivity in the interval of wavelength 400–1100 nm for recording the temperature lamp radiation in the temperature range from 1557 to 2494 K are reported.