6 February 2012 Novel design and alignment of wire-grid diffraction gratings on a visible focal plane array
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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.
© 2012 Society of Photo-Optical Instrumentation Engineers (SPIE)
Darren A. Miller, Eustace L. Dereniak, Daniel W. Wilson, "Novel design and alignment of wire-grid diffraction gratings on a visible focal plane array," Optical Engineering 51(1), 014001 (6 February 2012). https://doi.org/10.1117/1.OE.51.1.014001 . Submission:
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