From Event: SPIE Commercial + Scientific Sensing and Imaging, 2018
We have designed and successfully implemented 360-degree viewable holographic display prototype systems. Core idea of the system design lies in the exploitation of fast operating speed of DMD for binary amplitude modulation of light field, being distributed to more than 1,000 viewpoints along the 360 degree viewing circumference. Slanted downward viewing angle and 360 degree viewable 3-dimensional(3D) image over the center of tabletop display is achieved by specially designed optics. As a result, solid-looking 3D moving color images of larger than 3 inches are rendered and observed by several viewers at the same time from different viewing positions. We have implemented and experimented several variations of the system. They are tiling of SLM modules(2x2 tiling with 4 DMDs for mono-color display and 1x2 tiling with 6 DMDs for color display), using different SLMs(DMD of pixel pitch 13.68μm and resolution 1,024x768, DMD of pixel pitch 10.8μm and resolution 1,920x1,200), and applying different structure of image floating optics((1)double parabolic mirrors, (2)one parabolic mirror and one beam splitter, (3)two spherical and one flat mirror). We report the result of various display system implementations based on several combinations of above-mentioned design options.
Jinwoong Kim, Keehoon Hong, Yongjun Lim, Jae-Han Kim, and Minsik Park, "Design options for 360 degree viewable table-top digital color holographic displays," Proc. SPIE 10666, Three-Dimensional Imaging, Visualization, and Display 2018, 1066602 (Presented at SPIE Commercial + Scientific Sensing and Imaging: April 16, 2018; Published: 16 May 2018); https://doi.org/10.1117/12.2309281.
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