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Reducing speckle artifacts in digital holography through programmable filtration

  • Lim, Yongjun (Broadcasting and Media Research Laboratory, Electronics and Telecommunications Research Institute) ;
  • Park, Jae-Hyeung (Department of Information and Communication Engineering, Inha University) ;
  • Hahn, Joonku (School of Electronics Engineering, Kyungpook National University) ;
  • Kim, Hayan (Broadcasting and Media Research Laboratory, Electronics and Telecommunications Research Institute) ;
  • Hong, Keehoon (Broadcasting and Media Research Laboratory, Electronics and Telecommunications Research Institute) ;
  • Kim, Jinwoong (Broadcasting and Media Research Laboratory, Electronics and Telecommunications Research Institute)
  • Received : 2018.10.07
  • Accepted : 2018.12.17
  • Published : 2019.02.12
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Abstract

We propose a speckle reduction technique in electronic holographic display systems, where digital micro-mirror array devices are used as spatial light modulators. By adopting a programmable filtration in a general 4-f optic configuration, it is shown that the signal spectrum components in the frequency domain of a viewing-window-based holographic display system can be selectively filtered. Compared to the widely utilized single-sideband filtration techniques in electronic holographic display systems, our proposed programmable filtration can be utilized to effectively reduce the speckles in the reconstruction of point-cloud-based computer-generated holograms. Experimental results are presented to verify our proposed concept.

Keywords

References

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