Development of multi-point multi-wavelength pyrometer with a synchronous DAS

A new type of multi-point multi-wavelength pyrometer for solid propellant r ocker engine flame distribution measurement was developed successfully. The instrument can record the radiation fluxes of 8 wavelengths for uniformly distributed 6 points on the target surface, which are well defined by the h oles on the field stop lens. The fast-response pyrometer with the specially designed synchronous data acquisition system can assure that the recorded thermal radiation fluxes of different spectrum region are of the same time and the same true temperature even with dramatically changed targets.