Navy/Marine Corps innovative science and technology developments for future enhanced mine detection capabilities

Holloway, John H.; Witherspoon, Ned H.; Miller, R Eric; Davis, Kenn S.; Suiter, Harold R.; Hilton, Russell J.

doi:10.1117/12.396212

Cited by 3 publications

(2 citation statements)

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“…1 Polarimetry can be used to identify materials and to distinguish samples from a cluttered background. 3 On average, polarimetric images of man-made objects have a higher degree of polarization (DOP) than polarimetric images of natural objects. 3 On average, polarimetric images of man-made objects have a higher degree of polarization (DOP) than polarimetric images of natural objects.…”

Section: Background On Imaging Polarimetersmentioning

confidence: 99%

Quantum-well-detector concept for hyperspectral coregistered full-Stokes-vector detection

Serna

2002

Photonics for Space Environments VIII

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By layering quantum well stacks separated by partially transmissive linear gratings, similar to a multi-color QWIP, one may be able to detect the full Stokes vector at a single pixel. Such a detector would greatly aid polarization-based automated algorithms to detect targets from earth-gazing platforms. We report results from a theoretical calculation of normally incident infrared light absorbed by quantum wells in an eight-layer quantum-well/grating structure. The structure, illuminated from the substrate, consists of four quantum-well stacks, of 50 quantum wells each, separated by contact layers and lamellar gratings. The gratings following the first three quantum well stacks are formed by perfectly conducting rectangular strips separated by a transparent dielectric that allows some light to be transmitted. The top grating, following the fourth quantum well stack, is completely reflective. Each of the four lamellar gratings is oriented at a different angle. Incident radiation is diffracted and reflected to different orders and at different angles at each of the four gratings. The model is based on a uniaxial-optics transfer-matrix technique. We calculate the energy absorbed by each of the layers. This in turn allows one to predict and compare which layers will respond for partially-and fully-polarized incident light of either linear or circular polarization.

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Section: Background On Imaging Polarimetersmentioning

confidence: 99%

Quantum-well-detector concept for hyperspectral coregistered full-Stokes-vector detection

Serna

2002

Photonics for Space Environments VIII

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“…There are a multitude of potential military and civilian advantages to spectropolarimetric sensors that can be found in the cited references. [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?"…”

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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Single-pixel polarimeter: dielectric-gratings model and fabrication progress

Serna¹

2003

Infrared Physics & Technology

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Navy/Marine Corps innovative science and technology developments for future enhanced mine detection capabilities

Cited by 3 publications

References 0 publications

Quantum-well-detector concept for hyperspectral coregistered full-Stokes-vector detection

Quantum-well-detector concept for hyperspectral coregistered full-Stokes-vector detection

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

Single-pixel polarimeter: dielectric-gratings model and fabrication progress

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