13 June 2017 Focusing light through strongly scattering media by controlling binary amplitude optimization using genetic algorithm
Author Affiliations +
Proceedings Volume 10449, Fifth International Conference on Optical and Photonics Engineering; 1044927 (2017) https://doi.org/10.1117/12.2270835
Event: Fifth International Conference on Optical and Photonics Engineering, 2017, Singapore, Singapore
Abstract
Focusing light through strongly scattering media plays an important role in biomedical imaging and therapy. Here, we experimentally demonstrate light focusing through ZnO sample by controlling binary amplitude optimization using genetic algorithm. In the experiment, we use a Micro Electro-Mechanical System (MEMS)-based digital micromirror device (DMD) which is in amplitude-only modulation mode. The DMD consists of 1920×1080 square mirrors that can be independently controlled to reflect light to a desired position. We control only 160 thousand mirrors which are divided into 400 segments to modulate light focusing through the scattering media using advanced genetic algorithm. Light intensity at the target position is enhanced up to 50±5 times the average speckle intensity. The diameters of focusing spot can be changed ranging from 7 μm to 70 μm at arbitrary positions and multiple foci are obtained simultaneously. The spatial arrangement of multiple foci can be flexibly controlled. The advantage of DMDs lies in their switching speed up to 30 kHz, which has the potential to generate a focus in an ultra-short period of time. Our work provides a reference for the study of high speed wavefront shaping that is required in vivo tissues imaging.
© (2017) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Zhipeng Liu, Zhipeng Liu, Bin Zhang, Bin Zhang, Qi Feng, Qi Feng, Zhaoyang Chen, Zhaoyang Chen, Chengyou Lin, Chengyou Lin, Yingchun Ding, Yingchun Ding, } "Focusing light through strongly scattering media by controlling binary amplitude optimization using genetic algorithm", Proc. SPIE 10449, Fifth International Conference on Optical and Photonics Engineering, 1044927 (13 June 2017); doi: 10.1117/12.2270835; https://doi.org/10.1117/12.2270835
PROCEEDINGS
7 PAGES


SHARE
Back to Top