RESEARCH IN INFRARED SENSING

INFRA-RED SENSING EXPLOITS THE FACT THAT EVERYTHING ABOVE ABSOLUTE ZERO (MINUS 459 F) EMITS RADIATION IN THE INFRARED RANGE OF THE ELECTROMAGNETIC SPECTRUM, IN QUANTITIES AND AT WAVELENGTHS THAT DEPEND ON THE NATURE OF THE SURFACE (ITS EMISSIVITY) AND ON ITS TEMPERATURE. THIS RADIATION CAN BE RECORDED BY A RADIOMETER, WHICH GENERATES AN ELECTRICAL SIGNAL IN PROPORTION TO THE DIFFERENCES BETWEEN RADIATIONS SENSED, OR BY AN INFRARED SCANNER, WHICH PRODUCES AN IMAGE ON FILM RESEMBLING A CONVENTIONAL PHOTOGRAPH. RESEARCH IN INFRARED WAS CONDUCTED AS A MEANS OF ACQUIRING SURVEILLANCE AND RECONNAISSANCE INFORMATION FOR THE MILITARY. ANOTHER MILITARY USE OF INFRARED TECHNIQUES IS MISSILE GUIDANCE. INFRARED USES FOR CIVILIANS ARE IN THE MEDICAL FIELD AND AS A DETECTOR FOR HOT BOXES, OR OVER HEATED JOURNAL BOXES ON WHEELS OF RAILROAD TRAINS. IN POLAR STUDIES, INFRARED SENSORS HAVE DEMONSTRATED THEIR VALUE IN DETECTING SNOW- BRIDGED CREVICES IN GLACIERS OVER LARGE SNOW FIELDS - CREVICES THAT CAN SUDDENLY SWALLOW A MAN OR A VEHICLE. INFRARED SENSORS ARE USEFUL IN DETECTING AND MAPPING FOREST FIRES. INFRARED SURVEYS ARE SUCCESSFULLY CONDUCTED IN GEOLOGY, PHYSICAL OCEANOGRAPHY AND FOR DETECTION OF AIR POLLUTION. INFRARED SENSING TECHNIQUES CAN ALSO BE USED FOR MAPPING FOR LAND USE STUDIES AND URBAN AREA ANALYSIS. CROP INVENTORY MAY ALSO BE TAKEN USING INFRARED SENSING TECHNIQUES. THERE IS A CONTINUING NEED TO IMPROVE REMOTE SENSING EQUIPMENT.

  • Supplemental Notes:
    • Vol 18, No 8, PP 1-12, 3 FIG, 20 PHOT
  • Authors:
    • Thackrey, D E
  • Publication Date: 1968-2

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  • Accession Number: 00202637
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 6 1994 12:00AM