Accession Number : ADA193192

Title :   Radiometry Using Thermal Images. Part 2. Technical Details.

Descriptive Note : Technical rept.,

Corporate Author : ELECTRONICS RESEARCH LAB ADELAIDE (AUSTRALIA)

Personal Author(s) : Oermann, R J

PDF Url : ADA193192

Report Date : Sep 1987

Pagination or Media Count : 25

Abstract : In the first part of this report the general operating procedures and system description of the AGA Model 782 Thermovision were outlined. The calibration of the system to determine the relationship between the Thermal value (an empirical quantity related to the energy received) and temperature was described in detail. To enable the radiometric use of these thermal imagers, characteristics such as Field of View, Spectral Response and Irradiance Sensitivity had to be measured in order to validate the manufacturers's supplied specifications. The increased emphasis on the need to enhance the digitized images using image processing techniques has demanded the precise measurement of both the horizontal and vertical Modulation Transfer Functions in order to ascertain optimum sampling rates in both dimensions. This report will describe the techniques used to measure each of the necessary performance characteristics, detail all performance specifications of the Short Waveband (SWB) and Long Waveband (LWB) Model 782 Thermovisions in use in IOC Group in all hardware configurations and describe the optical path, scanning principle and video format produced by the systems.

Descriptors :   *IMAGE PROCESSING, *INFRARED IMAGE TUBES, *INFRARED IMAGES, *THERMOVISION, CALIBRATION, DIGITAL SYSTEMS, FORMATS, HORIZONTAL ORIENTATION, MEASUREMENT, MODULATION, OPTICS, OPTIMIZATION, PATHS, PERFORMANCE(ENGINEERING), PRECISION, QUANTITY, RADIANCE, RADIOMETRY, RATES, SAMPLING, SCANNING, SENSITIVITY, SPECIFICATIONS, SPECTRA, THERMAL PROPERTIES, TRANSFER FUNCTIONS, VERTICAL ORIENTATION, VIDEO SIGNALS, AUSTRALIA, FOREIGN TECHNOLOGY

Subject Categories : Infrared Detection and Detectors
      Recording and Playback Devices

Distribution Statement : APPROVED FOR PUBLIC RELEASE