Results 11 to 20 of about 219,223 (311)
Sub-Terahertz Computer Generated Hologram with Two Image Planes
Applied Sciences, 2019 An advanced optical structure such as a synthetic hologram (also called a computer-generated hologram) is designed for sub-terahertz radiation. The detailed design process is carried out using the ping-pong method, which is based on the modified ...
Mateusz Surma +3 more
doaj +2 more sources
Real-time 4K computer-generated hologram based on encoding conventional neural network with learned layered phase. [PDF]
Sci Rep, 2023 Learning-based computer-generated hologram (CGH) demonstrates great potential for real-time high-quality holographic displays. However, real-time 4K CGH generation for 3D scenes remains a challenge due to the computational burden.
Zhong C +6 more
europepmc +2 more sources
Phase dual-resolution networks for a computer-generated hologram.
Optics Express, 2022 The computer-generated hologram (CGH) is a method for calculating arbitrary optical field interference patterns. Iterative algorithms for CGHs require a built-in trade-off between computation speed and accuracy of the hologram, which restricts the ...
Ting Yu +5 more
semanticscholar +1 more source
A Content Hiding Method for Digital Hologram Using Multiple Fresnel Diffraction
Applied Sciences, 2020 A digital hologram (DH) is so highly valued that it needs to be protected from exposure to an unpermitted person, which could be done by a content encryption.
Young-Ho Seo +2 more
doaj +1 more source
Optics Express, 2020 Optical encryption has attracted wide attention for its remarkable characteristics. Inspired by the development of double random phase encoding, many researchers have developed a number of optical encryption systems for practical applications.
Lina Zhou, Yin Xiao, Wen Chen
semanticscholar +1 more source
High Resolution Computer-Generated Rainbow Hologram
Applied Sciences, 2018 We have developed an output device for a computer-generated hologram (CGH) named a fringe printer, which can output a 0.35- μ m plane-type hologram. We also proposed several CGH with a fringe printer.
Takeshi Yamaguchi, Hiroshi Yoshikawa
doaj +1 more source
Reduction in the reconstruction error of computer-generated holograms by photorefractive volume holography [PDF]
, 1993 We suggest a method for coding high-resolution computer-generated volume holograms. It involves splitting the computer-generated hologram into multiple holograms, their individual recording as volume holograms by use of the maximal resolution available ...
Barhen, Jacob +3 more
core +2 more sources
Fast calculation of computer-generated hologram of line-drawn objects without FFT.
Optics Express, 2020 Although holographic display technology is one of the most promising three-dimensional (3D) display technologies for virtual and augmented reality, the enormous computational effort required to produce computer-generated holograms (CGHs) to digitally ...
Takashi Nishitsuji +3 more
semanticscholar +1 more source
IEEE Access, 2021 We demonstrate an interactive holographic display system for real-time drawing and erasing of 3D point-cloud images. This system detects the position of the observer's fingertip with a motion sensor, which it uses to calculate the complex amplitude ...
Mikito Takenaka +3 more
doaj +1 more source
High-space bandwidth product computer-generated holography using volume holography [PDF]
, 1993 We suggest a method for coding high resolution computer-generated volume holograms. It involves splitting the computer-generated hologram into multiple holograms, each individually recorded as a volume hologram utilizing the maximal resolution available ...
Barhen, Jacob +3 more
core +1 more source