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Proceedings Paper

Long-wavelength infrared camera (LWIRC): a 10 micron camera for the Keck telescope
Author(s): Edward H. Wishnow; William C. Danchi; Peter G. Tuthill; Ronald E. Wurtz; J. Garrett Jernigan; John F. Arens
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Paper Abstract

The long wavelength IR camera is a facility instrument for the Keck Observatory designed to operate at the f/25 forward Cassegrain focus of the Keck I telescope. The camera operates over the wavelength band 7-13 micrometers using ZnSe transmissive optics. A set of filters, a circular variable filter, and a mid-IR polarizer are available, as are three plate scales: 0.05 inch, 0.10 inch, 0.12 inch per pixel. The camera focal plane array and optics are cooled using liquid helium. The system has been refurbished with a 128 X 128 pixel Si:As detector array. The electronics readout system used to clock the array is compatible wit both the hardware and software of the other Keck IR instruments NIRC and LWS. A new pre-amplifier/A-D converter has been designed and constructed which decreases greatly the system susceptibility to noise.

Paper Details

Date Published: 21 August 1998
PDF: 8 pages
Proc. SPIE 3354, Infrared Astronomical Instrumentation, (21 August 1998); doi: 10.1117/12.317285
Show Author Affiliations
Edward H. Wishnow, Univ. of California/Berkeley and Lawrence Livermore National Lab. (United States)
William C. Danchi, Univ. of California/Berkeley (United States)
Peter G. Tuthill, Univ. of California/Berkeley (United States)
Ronald E. Wurtz, Lawrence Livermore National Lab. (United States)
J. Garrett Jernigan, Univ. of California/Berkeley (United States)
John F. Arens, Univ. of California/Berkeley (United States)

Published in SPIE Proceedings Vol. 3354:
Infrared Astronomical Instrumentation
Albert M. Fowler, Editor(s)

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