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

C. N. Thomas; S. Withington

doi:10.1117/12.787409

21 July 2008 A new experimental procedure for determining the response of bolometric detectors to fields in any state of spatial coherence

C. N. Thomas, S. Withington

Author Affiliations +

Proceedings Volume 7020, Millimeter and Submillimeter Detectors and Instrumentation for Astronomy IV; 70201Z (2008) https://doi.org/10.1117/12.787409
Event: SPIE Astronomical Telescopes + Instrumentation, 2008, Marseille, France

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.

Citation Download Citation

C. N. Thomas and S. Withington "A new experimental procedure for determining the response of bolometric detectors to fields in any state of spatial coherence", Proc. SPIE 7020, Millimeter and Submillimeter Detectors and Instrumentation for Astronomy IV, 70201Z (21 July 2008); https://doi.org/10.1117/12.787409

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