New Pyro-Optic Techniques for Imaging of Long Wavelength IR-Radiation (Pyro-Optic Initiation Program).

摘要

From a simple consideration of the thermal conversation efficiency which can be realized in the non contact pyro-optic system it is shown that for f/l optics a scene temperature change of 0. 1 deg C will realize a change at the detector of 0.001 deg C for a detector thickness of 0.1 micrometer, chopping frequency of 25 Hz. For a simple pixel element 50 micron x 50 micron x 0.1 micron the RMS thermal noise limit in SBSI is calculated to be 3.5 x 10 to the -5 deg C well below the expected signal level. Using a very simple ellipsometric setup working into a photomultiplier detector it is shown that for SbSI single crystals and thin films, temperature oscillations of 0.001 deg C can be detected above noise level.