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Proceedings Paper

Diffraction-Limited 10 µm Imaging With 3 Meter Telescopes
Author(s): E. E. Bloemhof; C. H. Townes; A. H. B. Vanderwyck
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Paper Abstract

We have constructed an infrared imaging system that achieves diffraction-limited spatial resolution (about 0.8 arc seconds) at 10 um on 3 meter ground-based telescopes. The system uses a linear array of sensitive HgCdTe photodiodes, scanned in the direction perpendicular to the array axis, to form two-dimensional images. Scans are completed rapidly enough to freeze atmospheric fluctuations. Individual detectors are small compared to the diameter of the Airy disk, and images are oversampled heavily in the scan direction. This method has a number of advantages for studying small fields with very high spatial resolution, and has been applied successfully to the problem of directly imaging faint circumstellar dust shells.

Paper Details

Date Published: 13 October 1986
PDF: 6 pages
Proc. SPIE 0627, Instrumentation in Astronomy VI, (13 October 1986); doi: 10.1117/12.968125
Show Author Affiliations
E. E. Bloemhof, Harvard-Smithsonian Center for Astrophysics (United States)
C. H. Townes, University of California (United States)
A. H. B. Vanderwyck, Rockwell International. Science Center (United States)

Published in SPIE Proceedings Vol. 0627:
Instrumentation in Astronomy VI
David L. Crawford, Editor(s)

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