Abstract

The complete Fourier analysis in space and time is performed for a three-dimensional model of thin-film thermal-imaging systems. The model includes heat losses by thermal radiation and by heat conduction within the film as well as into the adjacent medium. Dirac δ functions are used for the description of the specific heat and the thermal conductivity. The exact solutions of the basic heat equation are applied for a comparison of different types of the Panicon, a passive thermal imaging device. The relevant temperature response is illustrated in the Fourier space. The inclusion of the adjacent medium implies an occasional maximum of the response function in k space.

© 1974 Optical Society of America

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