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학술대회 Improving Image Quality of 360 Degree Viewable Holographic Display System by Applying a Speckle Reduction Technique and a Spatial Filtering
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임용준, 홍기훈, 김하얀, 박민식, 김진웅
Digital Optics for Immersive Displays (DOID) 2018, pp.1-5
18MF1200, 디지털 홀로그래픽 테이블탑형 단말 기술 개발, 김진웅
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.
KSP 제안 키워드
360 degree viewable, Digital micro-mirror devices(DMD), Display System, Image quality, Light sources, Liquid Crystal on Silicon, Object image, Phase profile, Random distribution, Reduction technique, Silicon device