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

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Optics Express. 2011 Feb 14;19(4):2989-95. doi: 10.1364/OE.19.002989
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A high speed wavefront determination method based on spatial frequency modulations for focusing light through random scattering media. Cui Lab
Cui M
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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 - indexed for MEDLINE]

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