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Proceedings Paper

Results Of Testing Short Wavelength Hgcdte Hybrid Focal Plane Arrays For Earth Remote Sensing Applications
Author(s): Michael A. Blessinger; Mark Herring
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Paper Abstract

As a part of the NASA Imaging Spectrometer program, the Jet Propulsion Laboratory (JPL) has contracted with the Rockwell International Science Center to develop short-wavelength mercury cadmium telluride (HgCdTe) hybrid focal plane arrays. The imaging spectrometer concept requires high-performance array detectors which can be mosaicked into large focal planes. In the case of the Shuttle Imaging Spectrometer (SIS), a 64 x 64-element array with a cutoff wavelength of 2.5 μm is required. Prototype 32 x 32-element detectors with cutoff wavelengths of 4.8 μm and 2.5 μm have been tested by JPL. This testing has established confidence that the performance requirements for SIS can be achieved. The results have shown noise levels of 4000-6000 electrons per pixel for the 4.8 μm devices, dropping to 2000-4000 electrons per pixel for the 2.5 μm detectors. Pixel yields vary from 93% to 99%. The response linearity is exceptional for the 2.5 μm devices with a nonlinearity of about 2%. Quantum efficiencies as high as 60% have been measured. This paper will describe the results of the testing to date, including the performance of one of the 32 x 32-element arrays in the Airborne Imaging Spectrometer (AIS), a first-generation instrument which has produced extraordinary results in the identification and mapping of vegetation and geologic materials.

Paper Details

Date Published: 8 November 1984
PDF: 6 pages
Proc. SPIE 0501, State-of-the-Art Imaging Arrays and Their Applications, (8 November 1984); doi: 10.1117/12.944656
Show Author Affiliations
Michael A. Blessinger, California Institute of Technology (United States)
Mark Herring, California Institute of Technology (United States)

Published in SPIE Proceedings Vol. 0501:
State-of-the-Art Imaging Arrays and Their Applications
Keith N. Prettyjohns, Editor(s)

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