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Park, Jung-Hoon
Bio-Optics Lab
Research Interests
  • Biomedical optics, wavefront shaping, In-vivo deep tissue imaging

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Increasing the enhancement factor for DMD-based wavefront shaping

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Title
Increasing the enhancement factor for DMD-based wavefront shaping
Author
Nam, KibumPark, Jung-Hoon
Issue Date
2020-07
Publisher
OPTICAL SOC AMER
Citation
OPTICS LETTERS, v.45, no.13, pp.3381 - 3384
Abstract
Focusing through scattering media is a subject of great interest due to its direct impact in the field of biomedical optics. However, the greatest barrier currently limiting direct applications is the fact that most scattering media that we wish to deliver light through are dynamic. To focus or deliver light through dynamic scattering media, using a digital micromirror device (DMD) has been demonstrated to be a potential solution, as it enables fast modulation speeds. However, since a DMD is a binary amplitude modulator, the large number of controlled modes needed to acquire adequate focus enhancement has limited optimal usage. Here we demonstrate a novel (to the best of our knowledge) scheme to use the "thrown-away" components of light to effectively use a binary amplitude DMD as a binary phase modulator, thereby increasing the correction efficiency by a factor of two. Our concept can be applied to any iterative optimization algorithm and can speed up the iterative optimization process by increasing the enhancement factor, rather than the measurement or modulation speeds. (C) 2020 Optical Society of America
URI
https://scholarworks.unist.ac.kr/handle/201301/47385
URL
https://www.osapublishing.org/ol/abstract.cfm?uri=ol-45-13-3381
DOI
10.1364/OL.394752
ISSN
0146-9592
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