Imaging with array detectors using chopping and other forms of differential detection

Details Imaging with array detectors using chopping and other forms of differential detection Imaging with array detectors using chopping and other forms of differential detection

Jun 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994spie.2198.1432b&link_type=abstract

Proc. SPIE Vol. 2198, p. 1432-1437, Instrumentation in Astronomy VIII, David L. Crawford; Eric R. Craine; Eds.

Astronomy and Astrophysics

Astronomy

5

Scientific paper

To detect faint signals in the presence of a high background, differential techniques are often used. In IR astronomy this has led to the so-called chopping and nodding techniques. The introduction of array detectors especially for imaging in the thermal IR region of the astronomical spectrum requires an adaptations of these techniques which also takes into account the pixel nonuniformity of the array detector. I describe one possible imaging algorithm and the associated requirements for the chopping mechanisms of an 8-m telescope.

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