The acquisition of multiband polarimetric imagery: Calibration considerations

There is evidence that polarimetric as well as intensity contrast differences in images are band-dependent. Some previous evidence is reviewed. We are currently fabricating and testing a hyperspectral imaging polarimeter to assess and to take advantage of subtle spectral detail in hyperspectral polarimetric images. This device uses a tunable liquid crystal filter and a 16-bit camera. New and varied calibration challenges have occurred and are discussed. We consider it important to present the problems as well as the successes.