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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 2 — Jan. 16, 2012
  • pp: 1733–1740

High-speed scattering medium characterization with application to focusing light through turbid media

Donald B. Conkey, Antonio M. Caravaca-Aguirre, and Rafael Piestun  »View Author Affiliations


Optics Express, Vol. 20, Issue 2, pp. 1733-1740 (2012)
http://dx.doi.org/10.1364/OE.20.001733


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Abstract

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.

© 2012 OSA

OCIS Codes
(110.7050) Imaging systems : Turbid media
(290.4210) Scattering : Multiple scattering
(110.1080) Imaging systems : Active or adaptive optics

ToC Category:
Adaptive Optics

History
Original Manuscript: November 23, 2011
Revised Manuscript: December 30, 2011
Manuscript Accepted: December 31, 2011
Published: January 11, 2012

Virtual Issues
Vol. 7, Iss. 3 Virtual Journal for Biomedical Optics
January 20, 2012 Spotlight on Optics

Citation
Donald B. Conkey, Antonio M. Caravaca-Aguirre, and Rafael Piestun, "High-speed scattering medium characterization with application to focusing light through turbid media," Opt. Express 20, 1733-1740 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-2-1733


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