A Linear Scanning Balloon-Borne Telescope For Far-Infrared Astronomy

T. Nishimura; F. J. Low; R. F. Kurtz

doi:10.1117/12.957079

3 May 1979 A Linear Scanning Balloon-Borne Telescope For Far-Infrared Astronomy

T. Nishimura, F. J. Low, R. F. Kurtz

Proceedings Volume 0172, Instrumentation in Astronomy III; (1979) https://doi.org/10.1117/12.957079
Event: Instrumentation in Astronomy, 1979, Tucson, United States

Abstract

A low-background balloon-borne far-infrared (30-300μ) telescope, utilizing a linear scan mode has dramatically increased the efficiency of mapping large extended areas over more conventional systems. The system consists of a 20 cm linear scanned mirror mounted as an off-axis (Herchelian) telescope designed to achieve an emissivity of 1% or less, a ten position cooled aperture-filter wheel, a cooled Pfund optical system with a composite diamond-germanium bolometer mounted in a spherical cavity, a minimum phase shift ultra-low frequency amplifier, and a 4 micron thick mylar dewar window. This system was used to produce detailed far-infrared maps of the galactic plane. The system specifications and operating parameters will be discussed and preliminary data shown.

Citation Download Citation

T. Nishimura, F. J. Low, and R. F. Kurtz "A Linear Scanning Balloon-Borne Telescope For Far-Infrared Astronomy", Proc. SPIE 0172, Instrumentation in Astronomy III, (3 May 1979); https://doi.org/10.1117/12.957079

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