Journal
OPTICS EXPRESS
Volume 20, Issue 2, Pages 1733-1740Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.20.001733
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Funding
- Covidien
- National Science Foundation [DGE-0801680]
- IGERT: Interdisciplinary Graduate Education in Computational Optical Sensing and Imaging
- Div Of Electrical, Commun & Cyber Sys
- Directorate For Engineering [1028714] Funding Source: National Science Foundation
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We introduce a phase-control holographic technique to characterize scattering media with the purpose of focusing light through it. The system generates computer-generated holograms implemented via a deformable mirror device (DMD) based on micro-electro-mechanical technology. The DMD can be updated at high data rates, enabling high speed wavefront measurements using the transmission matrix method. The transmission matrix of a scattering material determines the hologram required for focusing through the scatterer. We demonstrate this technique measuring a transmission matrix with 256 input modes and a single output mode in 33.8 ms and creating a focus with a signal to background ratio of 160. We also demonstrate focusing through a temporally dynamic, strongly scattering sample with short speckle decorrelation times. (C) 2012 Optical Society of America
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