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Proceedings Paper

The thermal sieve: a diffractive baffle that provides thermal isolation of a cryogenic optical system from an ambient temperature collimator
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Paper Abstract

We present the thermal sieve, which is a diffractive baffle that provides thermal isolation between an ambient collimator and a cryogenic optical system being measured. The baffle uses several parallel plates with holes in them. The holes are lined up to allow the collimated light to pass, but the view factor for thermal radiation is greatly reduced. A particular design is shown here that allows less than 0.25 W/m2 thermal transfer and degrades the test wavefront by only 3 nm rms.

Paper Details

Date Published: 21 September 2012
PDF: 9 pages
Proc. SPIE 8442, Space Telescopes and Instrumentation 2012: Optical, Infrared, and Millimeter Wave, 84421L (21 September 2012); doi: 10.1117/12.927789
Show Author Affiliations
James H. Burge, College of Optical Sciences, The Univ. of Arizona (United States)
Dae Wook Kim, College of Optical Sciences, The Univ. of Arizona (United States)


Published in SPIE Proceedings Vol. 8442:
Space Telescopes and Instrumentation 2012: Optical, Infrared, and Millimeter Wave
Mark C. Clampin; Giovanni G. Fazio; Howard A. MacEwen; Jacobus M. Oschmann, Editor(s)

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