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25 February 2014 Viewing-zone-angle expansion of tiled color electronic holography reconstruction system
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We have recently developed an electronic holography reconstruction system by tiling nine 4Kx2K liquid crystal on silicon (LCOS) panels seamlessly. Magnifying optical systems eliminate the gaps between LCOS panels by forming enlarged LCOS images on the system’s output lenses. A reduction optical system reduces the tiled LCOS images to the original size, returning to the original viewing zone angle. Since this system illuminates each LCOS panel through polarized beam splitters (PBS) from different distances, viewing-zone-angle expansion was difficult since it requires illumination of each LCOS panel from different angles. In this paper, we investigated viewing-zone-angle expansion of this system by integrating point light sources in the magnifying optical system. Three optical fibers illuminate a LCOS panel from different angles in time-sequential order, reconstructing three continuous viewing-zones. Full-color image reconstruction was realized by switching the laser source among R, G, and B colors. We propose a fan-shaped optical fiber arrangement to compensate for the offset of the illumination beam center from the LCOS panel center. We also propose a solution for high-order diffraction light interference by inserting electronic shutter windows in the reduction optical system.
© (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Takanori Senoh, Koki Wakunami, Yasuyuki Ichihashi, Hisayuki Sasaki, Ryutaro Oi, and Kenji Yamamoto "Viewing-zone-angle expansion of tiled color electronic holography reconstruction system", Proc. SPIE 9006, Practical Holography XXVIII: Materials and Applications, 90060Z (25 February 2014);


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