Open AccessA high speed wavefront determination method based on spatial frequency modulations for focusing light through random scattering media
Author(s) -
Meng Cui
Publication year - 2011
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.19.002989
Subject(s) - wavefront , optics , spatial frequency , focus (optics) , scattering , degrees of freedom (physics and chemistry) , physics , light scattering , spatial light modulator , phase (matter) , adaptive optics , quantum mechanics
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.