Journal ArticleDOI
Anamorphic optical transformation of an amplitude spatial light modulator to a complex spatial light modulator with square pixels [Invited]
Hwi Kim,Chi-Young Hwang,Kwangsoo Kim,Jinyoung Roh,Woonchan Moon,Sungmin Kim,Beom-Ryoel Lee,Seungtaik Oh,Joonku Hahn +8 more
TLDR
M Mathematical modeling of the proposed system is described herein, and it was experimentally demonstrated that the effective complex SLM displays complex holographic three-dimensional images with a clear depth discrimination effect.Abstract:
A method is proposed for the construction of a square pixel complex spatial light modulator (SLM) from a commercial oblong full-high-definition (full-HD) amplitude SLM using an anamorphic optical filter. In the proposed scheme, one half-band of the optical Fourier transform of the amplitude-only spatial light field is rejected in the optical Fourier plane and the other half-band is reformatted to be an effective complex SLM with square pixels. This has an advantage in the viewing window plane since the shape of the viewing window becomes square and more ideal for observers who watch the hologram contents through it. For optimal transformation, the amplitude computer generated hologram encoding scheme was developed. Mathematical modeling of the proposed system is described herein, and it was experimentally demonstrated that the effective complex SLM displays complex holographic three-dimensional images with a clear depth discrimination effect.read more
Citations
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Journal ArticleDOI
Toward the next-generation VR/AR optics: a review of holographic near-eye displays from a human-centric perspective.
TL;DR: Compared with other 3D displays, the holographic display has unique advantages in providing natural depth cues and correcting eye aberrations and holds great promise to be the enabling technology for next-generation VR/AR devices.
Journal ArticleDOI
Holographic display for see-through augmented reality using mirror-lens holographic optical element.
TL;DR: The real-world scenes that are usually distorted by a Fourier lens or an SLM in the conventional holographic display can be observed without visual disturbance by using the proposed mirror-lens HOE (MLHOE).
Journal ArticleDOI
360-degree tabletop electronic holographic display.
Yongjun Lim,Keehoon Hong,Hwi Kim,Hyun-Eui Kim,Eun-Young Chang,Soohyun Lee,Kim Tae One,Jeho Nam,Hyon-Gon Choo,Jinwoong Kim,Joonku Hahn +10 more
TL;DR: A tabletop holographic display system for simultaneously serving continuous parallax 3.2-inch 360-degree three-dimensional holographic image content to multiple observers at a 45-degree oblique viewing circumference is demonstrated.
Journal ArticleDOI
Compact see-through 3D head-mounted display based on wavefront modulation with holographic grating filter
TL;DR: In this paper, a compact see-through three-dimensional head-mounted display (3D-HMD) is proposed and investigated, where two phase holograms are analytically extracted from the object wavefront and uploaded on different zones of the spatial light modulator (SLM).
Journal ArticleDOI
Deep neural network for multi-depth hologram generation and its training strategy
TL;DR: The proposed dataset composition method improves the quality of reconstructed images by the holograms generated by the network, called deep learning holograms (DLHs), and confirmed that the DLHs can reconstruct clear images at multiple depths similar to conventional multi-depth computer-generated holograms.
References
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Journal ArticleDOI
Introduction to Fourier Optics
Joseph W. Goodman,Mary E. Cox +1 more
TL;DR: The second edition of this respected text considerably expands the original and reflects the tremendous advances made in the discipline since 1968 as discussed by the authors, with a special emphasis on applications to diffraction, imaging, optical data processing, and holography.
Journal ArticleDOI
Complex Spatial Filtering with Binary Masks
B. R. Brown,Adolf W. Lohmann +1 more
TL;DR: Binary holograms yield reconstructed images of a quality equal to that of images obtained from usual holograms of comparable dimensions, and their binary matched filter is suitable for optical character recognition, the same as the usual optical matched filter introduced by Vander Lugt.
Journal ArticleDOI
Three-dimensional display technologies of recent interest: principles, status, and issues [Invited]
Jisoo Hong,Youngmin Kim,Hee-Jin Choi,Joonku Hahn,Jae-Hyeung Park,Hwi Kim,Sung-Wook Min,Ni Chen,Byoungho Lee +8 more
TL;DR: Up-to-date see-through 3D display is a concept close to the ultimate goal of presenting seamless virtual images, although it is still far from practical use, many efforts have been made to resolve issues such as occlusion problems.
Journal ArticleDOI
Wide viewing angle dynamic holographic stereogram with a curved array of spatial light modulators
TL;DR: A novel design of dynamic holographic stereogram with a curved array of spatial light modulators (SLMs) is proposed, which improves the scalability in viewing angle of holographic display and the loss of light power is significantly reduced.
Journal ArticleDOI
Computer-generated double-phase holograms
C K Hsueh,Alexander A. Sawchuk +1 more
TL;DR: A method of computer generating binary holograms based on the decomposition of a complex value into two phase quantities is described, and noise due to the displacement of the subcells and the phase coding is discussed.