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
Original Manuscript: October 1, 1973
Published: June 1, 1974
U. Martens and F. Kneubühl, "Dynamics of Thin-Film Thermal Detectors in Infrared Imaging Systems. 1: Basic Equations and Fourier Analysis," Appl. Opt. 13, 1455-1459 (1974)