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Journal Article
Reducing Speckle Artifacts in Digital Holography through Programmable Filtration
- Authors
- Yongjun Lim, Jae-Hyeung Park, Joonku Hahn, Hayan Kim, Keehoon Hong, Jinwoong Kim
- Issue Date
- 2019-02
- Citation
- ETRI Journal, v.41, no.1, pp.32-41
- ISSN
- 1225-6463
- Publisher
- 한국전자통신연구원 (ETRI)
- Language
- English
- Type
- Journal Article
- 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.
- KSP Keywords
- Computer generated holograms(CGH), Display System, Frequency domain(FD), Holographic display, Micro-mirror array, Point clouds, Signal spectrum, Spatial light modulator(SLM), Speckle Reduction, cloud-based, digital holography