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Proceedings Paper

Pupil plane multiplexing for multi-domain imaging sensors
Author(s): Roarke Horstmeyer; Gary W. Euliss; Ravindra A. Athale; Rick L. Morrison; Ronald A. Stack; Joseph Ford
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Paper Abstract

We describe an approach to polarimetric imaging based on a unique folded imaging system with an annular aperture. The novelty of this approach lies in the system's collection architecture, which segments the pupil plane to measure the individual polarimetric components contributing to the Stokes vectors. Conventional approaches rely on time sequential measurements (time-multiplexed) using a conventional imaging architecture with a reconfigurable polarization filter, or measurements that segment the focal plane array (spatial multiplexing) by super-imposing an array of polarizers. Our approach achieves spatial multiplexing within the aperture in a compact, lightweight design. The aperture can be configured for sequential collection of the four polarization components required for Stokes vector calculation or in any linear combination of those components on a common focal plane array. Errors in calculating the degree of polarization caused by the manner in which the aperture is partitioned are analyzed, and approaches for reducing that error are investigated. It is shown that reconstructing individual polarization filtered images prior to calculating the Stokes parameters can reduce the error significantly.

Paper Details

Date Published: 19 August 2008
PDF: 10 pages
Proc. SPIE 7096, Adaptive Coded Aperture Imaging and Non-Imaging Sensors II, 709605 (19 August 2008); doi: 10.1117/12.797772
Show Author Affiliations
Roarke Horstmeyer, The MITRE Corp. (United States)
Gary W. Euliss, The MITRE Corp. (United States)
Ravindra A. Athale, The MITRE Corp. (United States)
Rick L. Morrison, Distant Focus Corp. (United States)
Ronald A. Stack, Distant Focus Corp. (United States)
Joseph Ford, Univ. of California, San Diego (United States)

Published in SPIE Proceedings Vol. 7096:
Adaptive Coded Aperture Imaging and Non-Imaging Sensors II
David P. Casasent; Stanley Rogers, Editor(s)

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