Results 21 to 30 of about 5,099,511 (216)

Imperfections of Scalar Approximation in Calibration of Computer-Generated Holograms for Optical Surface Measurements

open access: yesApplied Sciences, 2021
Computer-generated hologram (CGH) null correctors are used as accuracy standards for interferometric measurements of optical surfaces and optical systems.
Yingying Bai   +5 more
doaj   +1 more source

Weighted Constraint Iterative Algorithm for Phase Hologram Generation

open access: yesApplied Sciences, 2020
A weighted constraint iterative algorithm is presented to calculate phase holograms with quality reconstruction. The image plane is partitioned into two regions where different constraint strategies are implemented during the iteration process.
Lizhi Chen   +5 more
doaj   +1 more source

Simulating a computer-generated waveguide hologram scattering problem with an artificial 2D Gaussian beam source

open access: yes, 2023
We study a computer-generated waveguide hologram scattering problem. An artificial current density function with Gaussian profile is defined on a source plane that is close to the scatterers.
Sun, Ligang   +7 more
core   +1 more source

Binary Computer-Generated Holograms by Simulated-Annealing Binary Search

open access: yesPhotonics, 2022
The binary computer-generated hologram (BCGH) has attracted much attention recently because it can address the high-speed binary spatial light modulator (SLM), such as a digital micromirror device (DMD) SLM.
Jung-Ping Liu, Chen-Ming Tsai
doaj   +1 more source

Compression of Phase-Only Holograms with JPEG Standard and Deep Learning

open access: yesApplied Sciences, 2018
It is a critical issue to reduce the enormous amount of data in the processing, storage and transmission of a hologram in digital format. In photograph compression, the JPEG standard is commonly supported by almost every system and device.
Shuming Jiao   +5 more
doaj   +1 more source

High Resolution Multiview Holographic Display Based on the Holographic Optical Element

open access: yesMicromachines, 2023
Limited by the low space-bandwidth product of the spatial light modulator (SLM), it is difficult to realize multiview holographic three-dimensional (3D) display.
Xiujuan Qin   +7 more
doaj   +1 more source

Accurate Hologram Generation Using Layer-Based Method and Iterative Fourier Transform Algorithm

open access: yesIEEE Photonics Journal, 2017
Random phase is always added to the object to diffuse the object light in computer-generated holograms. However, this addition causes considerable speckle noise in the reconstructed image. For improving the speckle noise problem, we propose a new method,
Hui Pang   +5 more
doaj   +1 more source

Perceptually motivated loss functions for computer generated holographic displays

open access: yesScientific Reports, 2022
Understanding and improving the perceived quality of reconstructed images is key to developing computer-generated holography algorithms for high-fidelity holographic displays.
Fan Yang   +5 more
doaj   +1 more source

Design of a computer-generated waveguide hologram for integrated free space sensing

open access: yes, 2021
In this work we present a design of a computer-generated waveguide hologram coupler with an ultra-long working distance and wavelength multiplexing in the near infrared.
Tianran Liu   +5 more
core   +1 more source

Application of Kinoform CGHs to an ID Tag System

open access: yesIEEE Photonics Journal, 2010
In this paper, we successfully apply multilevel kinoform computer-generated hologram (CGH) patterns, which are recorded on a fine texture paper by a photo printer, into the hologram identification (ID) tag system.
Hye-Rim Kim   +5 more
doaj   +1 more source

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