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Proceedings Paper

Hyperspectral measurement of the scattering of polarized light by skin
Author(s): Andrey S. Alenin; Lynne Morrison; Clara Curiel; J. Scott Tyo
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Paper Abstract

The goal of this study is to develop a spectropolarimeter for purposes of assessing polarization signatures in skin scattering on a regional scale. Prior research has that certain skin lesions have identifiable polarization signatures;1-3 however, those studies were limited to single lesion evaluation and are not convenient for screening patients with many suspicious legions. As a precursor to the future instrument, a simple actively illuminated Stokes spectropolarimeter was constructed to gather preliminary data about expected signatures and the required performance (resolution, wavelength, polarization state, etc.). This spectropolarimeter consists of a rotating retarder and a hyperspectral camera4 that scans through wavelengths by means of a Liquid Crystal Tunable Filter (LCTF). Data is captured in a serial fashion, where LCTF scans through eight wavelengths at each of the four retarder orientations. With a single acquisition taking 23 seconds to complete, it makes the issue of image registration very important. After proper alignment, the acquired images reveal that wavelength-dependent polarization signatures exist on a regional scale. In particular, it was found that polarization factors such as Degree of Linear Polarization (DoLP) tend to suppress many uninteresting skin features like wrinkles and skin texture, while capturing information that is not necessarily apparent in the intensity image.

Paper Details

Date Published: 9 September 2011
PDF: 17 pages
Proc. SPIE 8160, Polarization Science and Remote Sensing V, 816014 (9 September 2011); doi: 10.1117/12.895552
Show Author Affiliations
Andrey S. Alenin, College of Optical Sciences, The Univ. of Arizona (United States)
Lynne Morrison, The Univ. of Arizona (United States)
Clara Curiel, The Univ. of Arizona (United States)
J. Scott Tyo, College of Optical Sciences, The Univ. of Arizona (United States)

Published in SPIE Proceedings Vol. 8160:
Polarization Science and Remote Sensing V
Joseph A. Shaw; J. Scott Tyo, Editor(s)

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