Physics
Scientific paper
Jul 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992spie.1686...35p&link_type=abstract
In: Test and evaluation of IR detectors and arrays II; Proceedings of the Meeting, Orlando, FL, Apr. 22, 23, 1992 (A94-12744 02-
Physics
Automation, Calibrating, Cameras, Data Acquisition, Pixels, Radiance, Aerial Photography, Aerial Reconnaissance, Digital Data, Infrared Radiation, Infrared Spectrometers, Radiometers, Thermography
Scientific paper
An automated calibration system that was developed to calibrate IR flight cameras for a series of sub-orbital experiments is described. Short schedules as well as concern over cryo-cooler lifetimes dictated a totally automated calibration system that obtained as much data as possible over a short period of time. The data must be as complete as possible since the cameras are not recovered. For this reason the system calibrates each pixel individually. The output of the calibration is a set of calibration coefficients which convert the gray level output of the camera into physical units of radiance (Watts/cm2-str-microns). The Hughes 256 x 256 pixels PtSi cameras and 128 x 128 pixels HgCd cameras and Amber 128 x 128 pixels InSb cameras were calibrated. These cameras put out 8 bit digital data and sync signal at a given camera setting. The calibration acquisition system is described and the results for the Hughes 256 x 256 PtSi camera are shown.
Dobie Douglas W.
Ferretta Theodore E.
Hakala Dennis B.
Nolan Matt P.
Park Hye-Sook
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