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Proceedings Paper

A new experimental procedure for determining the response of bolometric detectors to fields in any state of spatial coherence
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Paper Abstract

We describe a procedure for measuring the full spatial state of coherence to which a bolometric detector is sensitive. It is based on the result that the expectation value of the output of any detector is given by the contraction of two tensor fields, one of which describes the state of coherence of the incoming radiation, and the other describes the state of coherence of the field to which the detector is sensitive. It follows that if a detector is illuminated by two coherent point sources and the phase of one source rotated relative to the other, the detector output displays a fringe. By repeating the process with different source locations, the entire detector coherence tensor can be reconstructed from the recorded complex visibilities.

Paper Details

Date Published: 21 July 2008
PDF: 12 pages
Proc. SPIE 7020, Millimeter and Submillimeter Detectors and Instrumentation for Astronomy IV, 70201Z (21 July 2008); doi: 10.1117/12.787409
Show Author Affiliations
C. N. Thomas, Cavendish Lab. (United Kingdom)
S. Withington, Cavendish Lab. (United Kingdom)


Published in SPIE Proceedings Vol. 7020:
Millimeter and Submillimeter Detectors and Instrumentation for Astronomy IV
William D. Duncan; Wayne S. Holland; Stafford Withington; Jonas Zmuidzinas, Editor(s)

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