A 58 X 62 Pixel Si:Ga Array Camera For 5 - 14 µm Astronomical Imaging

D. Y. Gezari; W. C. Folz; L. A. Woods; J. B. Wooldridge

doi:10.1117/12.948376

27 April 1988 A 58 X 62 Pixel Si:Ga Array Camera For 5 - 14 µm Astronomical Imaging

D. Y. Gezari, W. C. Folz, L. A. Woods, J. B. Wooldridge

Proceedings Volume 0973, Cryogenic Optical Systems and Instruments III; (1988) https://doi.org/10.1117/12.948376
Event: 32nd Annual International Technical Symposium on Optical and Optoelectronic Applied Science and Engineering, 1988, San Diego, CA, United States

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.

Citation Download Citation

D. Y. Gezari, W. C. Folz, L. A. Woods, and J. B. Wooldridge "A 58 X 62 Pixel Si:Ga Array Camera For 5 - 14 µm Astronomical Imaging", Proc. SPIE 0973, Cryogenic Optical Systems and Instruments III, (27 April 1988); https://doi.org/10.1117/12.948376

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