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Opt Express. 2011 Feb 14;19(4):2989-95. doi: 10.1364/OE.19.002989.

A high speed wavefront determination method based on spatial frequency modulations for focusing light through random scattering media.

Author information

  • Janelia Farm Research Campus, Howard Hughes Medical Institute, Ashburn, Virginia 20147, USA. cuim@janelia.hhmi.org

Abstract

A large number of degrees of freedom are required to produce a high quality focus through random scattering media. Previous demonstrations based on spatial phase modulations suffer from either a slow speed or a small number of degrees of freedom. In this work, a high speed wavefront determination technique based on spatial frequency domain wavefront modulations is proposed and experimentally demonstrated, which is capable of providing both a high operation speed and a large number of degrees of freedom. The technique was employed to focus light through a strongly scattering medium and the entire wavefront was determined in 400 milliseconds, ~three orders of magnitude faster than the previous report.

PMID:
21369123
[PubMed]
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