Time dependency of temperature of a laser-irradiated infrared target pixel as a low-pass filterThe thermal response of a surface layer of a pixel on an infrared target simulator is discussed. This pixel is maintained at a constant temperature by a rapidly scanning laser beam. An analytical model has been developed to describe the exact temperature dependence of a pixel as a function of time for different pixel refresh rates. The top layer of the pixel surface that generates the gray-body radiation shows the temperature dependence on time that is characteristic of a low-pass filter. The experimental results agree with the analytical predictions. The application of a pulsed laser beam to a noncontact, nondestructive diagnostic technique of surface characterization for the presence of microdefects is discussed.
Document ID
19920038831
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Scholl, Marija S. (JPL Pasadena, CA, United States)
Scholl, James W. (Alenka Associates Tempe, AZ, United States)