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- Title
Novel design and alignment of wire-grid diffraction gratings on a visible focal plane array.
- Authors
Miller, Darren A.; Wilson, Daniel W.; Dereniak, Eustace L.
- 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.
- Subjects
MICRO-optics; POLARIMETRY; OPTICAL measurements; POLARIZERS (Light); OPTICAL polarization; STOKES equations; OPTICAL instruments
- Publication
Optical Engineering, 2012, Vol 51, Issue 1, p014001-1
- ISSN
0091-3286
- Publication type
Article
- DOI
10.1117/1.OE.51.1.014001