Results 21 to 30 of about 4,908 (221)
Waveguide holograms: A new approach to hologram integration
Optics Communications, 1976 Abstract A new class of holography is proposed, in which (1) the evanescent part of a guided wave, or (2) the guided wave in a thin-film hologram is utilized as the reference wave and/or the illuminating one. The hologram was designated as “wave-guide hologram” and has advantages in the possibility of integration, wide field of view, and compactness ...
Toshiaki SUHARA +2 more
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2022 IEEE Conference on Virtual Reality and 3D User Interfaces (VR), 2022 UK Research & Innovation (UKRI); Engineering & Physical Sciences Research Council (EPSRC); Royal Society of ...
David R. Walton +8 more
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A digital hologram-based encryption and compression method for 3D models
Frontiers in Physics, 2022 This study proposes a novel method to compress and decompress the 3D models for safe transmission and storage. The 3D models are first extracted to become 3D point clouds, which would be classified by the K-means algorithm.
Yukai Sun +7 more
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Generation of Binary Off-axis Digital Fresnel Hologram with Enhanced Quality
ICT Express, 2015 The emergence of high resolution printer and digital micromirror device (DMD) has enabled real, off-axis holograms to be printed, or projected onto a screen.
Peter Wai Ming Tsang
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Nanophotonics, 2023 Metalenses have potential to replace various bulky conventional optical elements with ultrathin nanostructure arrays. In particular, active metalenses with reconfigurable focusing capability have attracted considerable interest from the academic and ...
Jung Joonkyo, Kim Hyeonhee, Shin Jonghwa
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Lossless Compression Using the Ramanujan Sums: Application to Hologram Compression
IEEE Access, 2020 The Ramanujan sum, introduced by S. Ramanujan, has been utilized-among other applications-for signal processing. It has recently been suggested that transforms using the Ramanujan sums may also provide the benefit of data compression. This study presents
Harutaka Shiomi +3 more
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Applied Sciences, 2018 Optical scanning holography (OSH) is a powerful and effective method for capturing the complex hologram of a three-dimensional (3-D) scene. Such captured complex hologram is called optical scanned hologram. However, reconstructing a focused image from an
Peter Wai Ming Tsang +2 more
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Nature CommunicationsSpatiotemporal structured light has opened up new avenues for optics and photonics. Current spatiotemporal manipulation of light mostly relies on phase-only devices such as liquid crystal spatial light modulators to generate spatiotemporal optical fields with unique photonic properties.
Qian Cao +3 more
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A new objective quality metric for phase hologram processing
ETRI Journal, 2021 Because of its convenience and compatibility with various image processing techniques, digital image representation of holograms is generally used in digital holography, and thus, quality assessment of digital holograms is an essential issue.
Kwan-Jung Oh, Jinwoong Kim, Hui Yong Kim
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Experimental study on Fe: LiNbO3 crystal angular multiplexing holography
上海师范大学学报. 自然科学版, 2019 In this paper,the recording and readout characteristics of photorefractive volume hologram were studied by using Fe:LiNbO3 crystal as the recording medium.The optical experimental setup for angular multiplexing photorefractive volume holographic was ...
TANG Ming +4 more
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