21 May 2018 Improving image quality of 360-degree viewable holographic display system by applying a speckle reduction technique and a spatial filtering
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Abstract
Generally in electronic holographic display systems, coherent light sources are used to reconstruct holograms. The random distribution of phase profile of an object image causes unwanted dark and bright spots to degrade reconstructed hologram images. In addition, a periodic structure of available spatial light modulators such as liquid crystal on silicon devices and digital micro-mirror devices generates various diffractive signals when they are illuminated by coherent light sources. Consequently, it is necessary to select a proper signal band in spatial frequency domain by effectively filtering out unwanted signals. In this paper, the speckle pattern in a table-top holographic display system is measured and the method for reducing the speckle patterns is to be shown.
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Yongjun Lim, Keehoon Hong, Hayan Kim, Minsik Park, Jinwoong Kim, "Improving image quality of 360-degree viewable holographic display system by applying a speckle reduction technique and a spatial filtering", Proc. SPIE 10676, Digital Optics for Immersive Displays, 106760Q (21 May 2018); doi: 10.1117/12.2315654; https://doi.org/10.1117/12.2315654
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