High-Resolution Phase-Only Holographic 3D Display Based on Light Field Images Rendered in the Frequency Domain

Abstract

Phase-only holograms are more attractive than the amplitude holograms for the higher energy utilization and the possibility to realize on-axis holographic 3D display without conjugate image. In this study, we propose a high-resolution phase-only holographic 3D display using the light field images rendered in the frequency domain. The high-resolution phase-only hologram contains a large number of elemental phase-only holograms (EPHs), and each EPH is calculated from the light field image of the corresponding viewing point in frequency domain through weighted GS (Gerchberg-Saxton) algorithm. Parallel calculation is performed to speed up the calculation in the row direction and the previous EPH is used as the initial phase for the current EPH calculation in order to improve the display quality due to the great similarity between adjacent light field images. Two high-resolution phase-only holograms both with the size of 64 mm×64 mm and the resolution of 200k×200k pixels were calculated and printed by our homemade holographic printer. The full-parallax and high quality 3D displays were verified by optical experiments, which have the potential to be applied in holographic advertising and other fields. Index Terms-Holographic 3D display, light filed 3D display, phase-only hologram, light field image rendering

Low-voltage driving high-resistance liquid crystal micro-lens with electrically tunable depth of field for the light field imaging system

“…Compared with the traditional imaging method as the dominant approach to observe the matter is limited to recording only the two-dimensional (2D) aspect, whereas three-dimensional (3D) LFI can obtain information on the location and direction of spatial objects at the same time. With the rapid proliferation of high-speed imaging, continuous-depth cues, refocusing, volumetric display and head-mount holographic reconstruction, extensive efforts have been made to improve the quality of this modern imaging systems 8 – 10 . The LFI system can be constructed by implementing microlens arrays (MLAs) between the primary lens and the single camera, which captures the information of an object from different perspectives that emanate or reflect from a scenario 11 – 13 .…”