High-speed scanning interferometric focusing by fast measurement of binary transmission matrix for channel demixing

Opt Express. 2015 Jun 1;23(11):14168-87. doi: 10.1364/OE.23.014168.

Abstract

Using the fast measurement of a binary transmission matrix and a digital micromirror device, we demonstrate high-speed interferometric focusing through highly dynamic scattering media with binary intensity modulation. The scanning of speckles for reference optimization gives stable focusing, which can be used for focusing through a fast changing media or two dimensional scanning through a slowly changing scattering media. The system allows dynamic focusing at 12.5 Hz with 1024 input modes, and more than 60 times intensity enhancement. It was tested with a moving diffuser, a mouse brain and skull tissue. The experiment with a live drosophila embryo shows its potential in compensating dynamic scattering in live biological tissue.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Animals
  • Brain / anatomy & histology
  • Drosophila melanogaster / embryology
  • Embryo, Nonmammalian / anatomy & histology
  • Interferometry / methods*
  • Mice
  • Optical Phenomena*
  • Scattering, Radiation
  • Time Factors