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Proceedings Paper

A 58 X 62 Pixel Si:Ga Array Camera For 5 - 14 µm Astronomical Imaging
Author(s): D. Y. Gezari; W. C. Folz; L. A. Woods; J. B. Wooldridge
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Paper Abstract

A new infrared array camera system has been successfully applied to high background 5 - 14 μm astronomical imaging photometry observations, using a hybrid 58 x 62 pixel Si:Ga array detector manufactured by Hughes/Santa Barbara Research Center. The off-axis reflective optical design incorporating a parabolic camera mirror, circular variable filter wheel and cold aperture stop produces diffraction-limited images with negligible spatial distortion and minimum thermal background loading. The camera electronic system architecture is divided into three sub-systems: 1) high speed analog front end, including 2-channel preamp module, array address timing generator, bias power suppies, 2) two 16 bit, 3 microsec per conversion A/D converters interfaced to an arithmetic array processor, and 3) a LSI 11/73 camera control and data analysis computer. The background-limited observational noise performance of the camera at the NASA/IRTF telescope is NEFD (1a) = 0.05 jy pixe -1 min -1/2.

Paper Details

Date Published: 27 April 1988
PDF: 12 pages
Proc. SPIE 0973, Cryogenic Optical Systems and Instruments III, (27 April 1988); doi: 10.1117/12.948376
Show Author Affiliations
D. Y. Gezari, NASA/Goddard Space Flight Center (United States)
W. C. Folz, NASA/Goddard Space Flight Center (United States)
L. A. Woods, NASA/Goddard Space Flight Center (United States)
J. B. Wooldridge, NASA/Goddard Space Flight Center (United States)

Published in SPIE Proceedings Vol. 0973:
Cryogenic Optical Systems and Instruments III
Ramsey K. Melugin; Warren G. Pierce, Editor(s)

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