Polarization modulated image conjugate piston sensing and phase retrieval system
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United States of America Patent
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Jan 4, 2011
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app pub date -
Dec 3, 2008
filing date -
Dec 3, 2008
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Abstract
A system for detecting piston diversity between mirror segments. The system includes a pupil plane mask, a transform optical element, and an image detector. The pupil plane mask includes two or more open mask areas and two or more polarizers. Each polarizer is disposed within a respective one of the open mask areas. A first one of the two or more polarizers has a first polarization orientation, and a second of the two or more polarizers has a second polarization orientation.
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