Accession Number : ADA260969


Title :   New Pyro-Optic techniques for Imaging of Long Wavelength IR-Radiation (Pyro-Optic Initiation Program)


Descriptive Note : Final rept. 31 Mar-30 Sep 92,


Corporate Author : PENNSYLVANIA STATE UNIV UNIVERSITY PARK MATERIALS RESEARCH LAB


Personal Author(s) : Cross, L E ; Bhalla, A S


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a260969.pdf


Report Date : 21 Dec 1992


Pagination or Media Count : 23


Abstract : 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.


Descriptors :   *INFRARED DETECTION , *THIN FILMS , *INFRARED RADIATION , *OPTICAL PYROMETERS , *SINGLE CRYSTALS , FREQUENCY , OPTICS , TEMPERATURE , SIGNALS , ELLIPSOMETERS , THERMOCOUPLE PYROMETERS , OSCILLATION , PIXELS , LONG WAVELENGTHS , REFLECTANCE , NOISE , OPTICAL IMAGES , THICKNESS , DETECTORS , OPTICAL DETECTION , SIGNAL TO NOISE RATIO


Subject Categories : Infrared Detection and Detectors


Distribution Statement : APPROVED FOR PUBLIC RELEASE