Spatial heterodyne spectroscopy (SHS) is a Fourier-transform spectroscopic technique that
simultaneously records all path differences using a detector array. Compared to
conventional Fourier-transform spectroscopy that measures interferogram samples
sequentially in the time domain, SHS is insensitive to a changing scene; however, the effects
caused by differences in the detector elements and∕or the optics for each sample must be
addressed with a flatfield correction. The flatfield correction is typically a characteristic of
the instrument and does not change with the observed scene. We present three different
flatfielding approaches. Each is based on different assumptions and is applicable depending
on the instrumental effects dominating the flatfield.
© 2006 Optical Society of America
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