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Proceedings Paper

Portable Compact Multifunction IR Calibrator
Author(s): Clair L. Wyatt; Larry Jacobsen; Allan Steed
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Paper Abstract

New infrared calibration test facilities are required to provide for the calibration of sensors that exhibit resolution in the microradian range and that utilize a large number of detectors in linear and area arrays. Simple collimators with low divergent beams are typically physically large, costly to cool, and provide only a partial calibration. Other capabilities such as multiple point sources, bar patterns and an extended-area source are needed. A compact portable multifunction calibrator is designed for future sensor systems that enables a linearity calibration for all detectors simultaneously using a near small area source ( Jones source), a high resolution mapping of the focal plane with 10 prad setability and with a blur of less than 100 prad, system spectral response calibration (radiometer) using a Michelson interferometer source, relative spectral response (spectrometer) using high-temperature external commercial blackbody simulators, and an absolute calibration using an internal low-temperature extended-area source. In addition, a scatter plate is available to provide a diffuse full-field and full-aperture but attenuated high-temperature radiation source, bar pattern reticles to provide direct evaluation of modulation transfer function and and bandpass filters to provide system parameter evaluation at selected wavelengths. The portable system is made compact through the use of a folded Gregorian collimator design and includes an extended-area source, scatter plate, and Jones source which are stowed in the system and can be switched into the beam.

Paper Details

Date Published: 14 July 1988
PDF: 10 pages
Proc. SPIE 0940, Infrared Scene Simulation: Systems, Requirements, Calibration, Devices, and Modeling, (14 July 1988); doi: 10.1117/12.947141
Show Author Affiliations
Clair L. Wyatt, Utah State University (United States)
Larry Jacobsen, Utah State University (United States)
Allan Steed, Utah State University (United States)

Published in SPIE Proceedings Vol. 0940:
Infrared Scene Simulation: Systems, Requirements, Calibration, Devices, and Modeling
R. Barry Johnson; Milton J. Triplett, Editor(s)

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