Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008spie.7020e..49t&link_type=abstract
Millimeter and Submillimeter Detectors and Instrumentation for Astronomy IV. Edited by Duncan, William D.; Holland, Wayne S.; W
Astronomy and Astrophysics
Astronomy
Scientific paper
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.
Thomas Christopher N.
Withington Stafford
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