Inversion Of Temperature Distribution Of Multispectral Radiation Thermometry Technology

Temperature distribution in laser-material interaction processes of inversion analysis technology is an interdisciplinary integrated research project, with the improvement of laser energy density or power density, temperature inversion of its material gradually being used in the field of processing industry and the military.Multispectral radiation Thermometry (MRT) is one of method for non-contact temperature measurement. The present MRT could invert only one approximate temperature value, and the actual temperature distribution could not been given. In this article principal component analysis (PCA) was applies to solve the problem based on Planck’s laws. For example, In the laser damage target experiments, input laser pulse energy is34.2J, the inversion temperature value is2700k from the thermal radiation spectrum. The fitting relative deviation is0.5%, and when the temperature distribution from2600k to2800K, the fitting relative deviation is reduced to0.13%. Temperature distribution inversion was first show based on PCA, and the measurement accuracy of non-contact temperature was improved.