Parallel wavefront optimization method for focusing light through random scattering media

Opt Lett. 2011 Mar 15;36(6):870-2. doi: 10.1364/OL.36.000870.


A parallel wavefront optimization method is demonstrated experimentally to focus light through random scattering media. The simultaneous modulation of multiple phase elements, each at a unique frequency, enables a parallel determination of the optimal wavefront. Compared to a pixel-by-pixel measurement, the reported parallel method uses the target signal in a highly efficient way. With 441 phase elements, a high-quality focus was formed through a glass diffuser with a peak-to-background ratio of ∼270. The accuracy and repeatability of the system were tested through experiments.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Light*
  • Optical Phenomena*
  • Scattering, Radiation*