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http://dx.doi.org/10.3807/JOSK.2015.19.1.029

Image-Quality Enhancement for a Holographic Wavefront Color Printer by Adaptive SLM Partitioning  

Hong, Sunghee (School of Electronic and Electrical Engineering, Sung Kyun Kwan University)
Stoykova, Elena (Realistic Media Platform Research Center, Korea Electronics Technology Institute)
Kang, Hoonjong (Realistic Media Platform Research Center, Korea Electronics Technology Institute)
Kim, Youngmin (Realistic Media Platform Research Center, Korea Electronics Technology Institute)
Hong, Jisoo (Realistic Media Platform Research Center, Korea Electronics Technology Institute)
Park, Joosup (Realistic Media Platform Research Center, Korea Electronics Technology Institute)
Park, Kiheon (School of Electronic and Electrical Engineering, Sung Kyun Kwan University)
Publication Information
Journal of the Optical Society of Korea / v.19, no.1, 2015 , pp. 29-37 More about this Journal
Abstract
The wavefront printer records a volume-reflection hologram as a two-dimensional array of elemental holograms from computer-generated holograms (CGHs) displayed on a spatial light modulator (SLM). The wavefront coming from the object is extracted by filtering in the spatial-frequency domain. This paper presents a method to improve color reproduction in a wavefront printer with spatial division of exposures at primary colors, by adaptive partitioning of the SLM in accordance with the color content encoded in the input CGHs, and by the controllable change of exposure times for the recording of primary colors. The method is verified with a color wavefront printer with demagnification of the object beam. The quality of reconstruction achieved by the proposed method proves its efficiency in eliminating the stripe artifacts that are superimposed on reconstructed images in conventional mosaic recording.
Keywords
Wavefront printer; SLM; Volume hologram; Color recording;
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