Space-based hyperspectral imagery of the moon and Earth limb

Otten, Leonard John; Jones, Bernard Al; Edwards, Ana; Lane, Joshua E.; Caudill, Thomas R.; Osweiler, Victor; Yarbrough, S. A.; Arnold, James E.; Quarles, Rojan; Kouba, Eric

doi:10.1117/12.450650

Cited by 2 publications

(1 citation statement)

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“…[1][2][3][4] In this paper, I will focus on a new type of spectro-polarimetric imaging that combines the QWISPP pixel described in references [5][6][7] with the FTIR imaging like that used in references. 8,9 The next few paragraphs should answer the question: "What is special about a QWISPP?" Polarization is normally detected by combining a polarization filter, like polarized sunglasses, with a spectrally sensitive detector, like a digital camera or the human eye.…”

Section: Introductionmentioning

confidence: 99%

Generalizing a quantum-well infrared single-pixel polarimeter (QWISPP) to Fourier transform spectral-polarimetric imaging

Serna

McCauley

2004

Infrared Spaceborne Remote Sensing XII

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At previous SPIE meetings, we reported on an optoelectronic device that measures the complete polarization state of incident infrared light in a single pixel and in a single frame for a narrow wavelength band ( δλ <0.05 µm). Using at least four quantum-well stacks and four linear gratings, each stacked alternating above the other, the device uses the interference among light paths to create a distinct pattern of photocurrents at each quantum-well stack coding for a specific polarization. In this paper, we will model the performance of this device, a quantum-well infrared single-pixel polarimeter (QWISPP), in the setting of a Fourier transform infrared (FTIR) imager. We model one column of QWISPP pixels detecting an interferogram. Using an FTIR with randomly varying QWISPP pixels to detect the interferogram, we discovered a technique that allows an 100× improvement in measured spectral-polarization uncertainty compared to the use of identical QWISPP pixels in an FTIR or grating spectrometer. The technique also enables a 15× improvement in the uniformity of the error across a sample spectrum. In other words, we turn into an advantage the imperfections in fabricating an FPA of QWISPPs.

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