Anti-scattering light focusing by fast wavefront shaping based on multi-pixel encoded digital-micromirror device

Jiamiao Yang; Qiaozhi He; Linxian Liu; Yuan Qu; Rongjun Shao; Bowen Song; Yanyu Zhao

doi:10.1038/s41377-021-00591-w

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Anti-scattering light focusing by fast wavefront shaping based on multi-pixel encoded digital-micromirror device

Articles

- Anti-scattering light focusing by fast wavefront shaping based on multi-pixel encoded digital-micromirror device
- Light: Science & Applications Vol. 10, Issue 8, Pages: 1527-1535(2021)
- Affiliations：
  
  1.Department of Instrument Science and Engineering, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, 200240, Shanghai, China
  2.Shanghai Center for Brain Science and Brain-Inspired Technology, 200031, Shanghai, China
  3.School of Automation and Software Engineering, Shanxi University, 030006, Taiyuan, China
  4.Beijing Advanced Innovation Center for Biomedical Engineering, Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Engineering Medicine, Beihang University, 100191, Beijing, China
- Author bio：
  
  Linxian Liu (linxianliu@sjtu.edu.cn)
  Yanyu Zhao (yanyuzhao@buaa.edu.cn)
- Funds：
- DOI：10.1038/s41377-021-00591-w
  CLC：
- Published：31 August 2021，
  
  Published Online：20 July 2021，
  
  Received：03 March 2021，
  
  Revised：18 June 2021，
  
  Accepted：04 July 2021
- Accepted：
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Yang, J M. et al. Anti-scattering light focusing by fast wavefront shaping based on multi-pixel encoded digital-micromirror device. Light: Science & Applications, 10, 1527-1535 (2021).
DOI：

Yang, J M. et al. Anti-scattering light focusing by fast wavefront shaping based on multi-pixel encoded digital-micromirror device. Light: Science & Applications, 10, 1527-1535 (2021). DOI： 10.1038/s41377-021-00591-w.

摘要

Abstract

Speed and enhancement are the two most important metrics for anti-scattering light focusing by wavefront shaping (WS)

which requires a spatial light modulator with a large number of modulation modes and a fast speed of response. Among the commercial modulators

the digital-micromirror device (DMD) is the sole solution providing millions of modulation modes and a pattern rate higher than 20 kHz. Thus

it has the potential to accelerate the process of anti-scattering light focusing with a high enhancement. Nevertheless

modulating light in a binary mode by the DMD restricts both the speed and enhancement seriously. Here

we propose a multi-pixel encoded DMD-based WS method by combining multiple micromirrors into a single modulation unit to overcome the drawbacks of binary modulation. In addition

to efficiently optimize the wavefront

we adopted separable natural evolution strategies (SNES)

which could carry out a global search against a noisy environment. Compared with the state-of-the-art DMD-based WS method

the proposed method increased the speed of optimization and enhancement of focus by a factor of 179 and 16

respectively. In our demonstration

we achieved 10 foci with homogeneous brightness at a high speed and formed W- and S-shape patterns against the scattering medium. The experimental results suggest that the proposed method will pave a new avenue for WS in the applications of biomedical imaging

photon therapy

optogenetics

dynamic holographic display

etc.

关键词

Keywords

references

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