The Foil Parameters from Calibration of the Imaging Bolometer Foil

We obtained the local foil properties of the imaging bolometer foil such as the thermal diffusivity, K. and the productof the thermal conductivity. k, and the thickness. t6 by calibrating some parts of the foil. The parameters are determinedby [mite element modeling (FEM) of the foil temperature and comparing the solution to the experimental results.Calibration of the foil was made in situ using a He-Ne laser as a known radiation source to heat the foil. Thethermal images of the foil are provided by an infrared (IR) camera. In this work we apply this calibration techniqueto investigate the variation of the foil parameters. Variation in the local temperature rise of the foil due to local heatingby the laser beam indicates a variation of the foil parameters K, k and tf;