15 February 2012 MEMS spatial light modulators for controlled optical transmission through nearly opaque materials
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Proceedings Volume 8253, MEMS Adaptive Optics VI; 82530L (2012) https://doi.org/10.1117/12.911384
Event: SPIE MOEMS-MEMS, 2012, San Francisco, California, United States
Abstract
A reflective microelectromechanical mirror array was used to control the intensity distribution of a coherent beam that was propagated through a strongly scattering medium. The controller modulated phase spatially in a plane upstream of the scattering medium and monitored intensity spatially in a plane downstream of the medium. Optimization techniques were used to maximize the intensity at a single point in the downstream plane. Intensity enhancement by factors of several hundred were achieved within a few thousand iterations using a MEMS segmented deformable mirror (e.g. a spatial light modulator) with 1020 independent segments. Experimental results are reported for alternate optimization approaches and for optimization through dynamically translating scattering media.
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Thomas Bifano, Yang Lu, Christopher Stockbridge, Aaron Berliner, John Moore, Richard Paxman, Santosh Tripathi, Kimani Toussaint, "MEMS spatial light modulators for controlled optical transmission through nearly opaque materials", Proc. SPIE 8253, MEMS Adaptive Optics VI, 82530L (15 February 2012); doi: 10.1117/12.911384; https://doi.org/10.1117/12.911384
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