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Proceedings Paper

Portable Optical Sensor Tester (POST) Calibration Technique
Author(s): Michael A. Levine; Clyde A. Randolph
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Paper Abstract

The Portable Optical Sensor Tester (POST) is a low background, long wavelength infrared test and calibration chamber used for evaluation and calibration of developmental LWIR sensors. It is operated by Rockwell International for the Ballistic Missile Defense Advanced Technology Center (BMDATC). The POST system generates a collimated output IR beam from a working blackbody source for test and calibration of LWIR sensors. Internal scan mirrors are used to scan the output beam to simulate flight sensor scanning. The optical path has eleven reflective surfaces making a spectral calibration of the output beam necessary. This calibration is accomplished by utilizing an NBS calibrated blackbody with a calibration accuracy of 4.2% (la quadrature accuracy = 2.0%) as a reference standard. In situ calibration of the output beam is accomplished by sampling part of the output beam and comparing it spectrally, point by point, with the output from the reference blackbody. A grating cube spectroradiometer resident in POST is used to make the spectral comparison. By careful analysis of the diffraction effects at the reference blackbody source and the utilization of a single reflective optical element to direct the reference source energy to the spectroradiometer, the calibration uncertainties are minimized.

Paper Details

Date Published: 22 September 1983
PDF: 9 pages
Proc. SPIE 0416, Applications of Optical Metrology: Techniques and Measurements II, (22 September 1983); doi: 10.1117/12.935927
Show Author Affiliations
Michael A. Levine, Rockwell International Corporation (United States)
Clyde A. Randolph, Rockwell International Corporation (United States)

Published in SPIE Proceedings Vol. 0416:
Applications of Optical Metrology: Techniques and Measurements II
Jar Jueh Lee, Editor(s)

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