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New techniques for far-infrared filters.The techniques considered make it possible to construct high performance low-pass wide-band, and medium-band filters at wavelengths in the range from 25 to 300 micrometers. Short wavelength rejection without appreciable loss at long wavelengths is achieved by means of small particle scattering. Spectral definition in the far infrared is obtained by cooling one or more crystalline materials to liquid-He or liquid-nitrogen temperatures. The problem of reflection losses at the various surfaces is solved by a new antireflection coating technique.
Document ID
19730055325
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Armstrong, K. R.
Low, F. J.
(Steward Observatory Tucson, Ariz., United States)
Date Acquired
August 7, 2013
Publication Date
September 1, 1973
Publication Information
Publication: Applied Optics
Volume: 12
Subject Category
Instrumentation And Photography
Accession Number
73A40127
Distribution Limits
Public
Copyright
Other

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