A radiation pyrometer for measuring the true temperature of a body is provided by detecting and measuring thermal radiation from the body based on the principle that the effects of angular emission I.sub.1 and reflection I.sub.2 on the polarization states p and s of radiation are complementary such that...http://www.google.com.au/patents/US5436443?utm_source=gb-gplus-sharePatent US5436443 - Polaradiometric pyrometer in which the parallel and perpendicular components of radiation reflected from an unpolarized light source are equalized with the thermal radiation emitted from a measured object to determine its true temperature
