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Optical Engineering

Novel design and alignment of wire-grid diffraction gratings on a visible focal plane array
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Paper Abstract

A pixelated, wire-grid diffraction grating is designed, fabricated, aligned, and mounted on an active focal plane array of a camera operating in the visible. The resulting design of the pixelated wire-grid polarizer array eschewed the need for fine translational alignments and drastically reduced cross-talk between pixels detecting differing polarization states. Using common optomechanical elements in conjunction with a novel correlation-based alignment metric, we are able to achieve repeatable angular alignments to better than 0.004 deg between the focal plane array and the pixelated wire-grid polarizer array, both featuring 6.45 μm pixels. An on-chip, four-state, linear snapshot polarimeter is yielded in the detailed processes and raw image data from the instrument are presented.

Paper Details

Date Published: 6 February 2012
PDF: 8 pages
Opt. Eng. 51(1) 014001 doi: 10.1117/1.OE.51.1.014001
Published in: Optical Engineering Volume 51, Issue 1
Show Author Affiliations
Darren A. Miller, College of Optical Sciences, The Univ. of Arizona (United States)
Eustace L. Dereniak, College of Optical Sciences, The Univ. of Arizona (United States)
Daniel W. Wilson, Jet Propulsion Lab. (United States)

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