Results 71 to 80 of about 219,223 (311)
Optimization of Phase-Only Computer-Generated Holograms Based on the Gradient Descent Method
Applied Sciences, 2020 The Gerchberg–Saxton (GS) algorithm is a Fourier iterative algorithm that can effectively optimize phase-only computer-generated holograms (CGHs). This study proposes a new optimization technique for phase-only CGHs based on the gradient descent method ...
Shujian Liu, Yasuhiro Takaki
doaj +1 more source
Speckle reduced lensless holographic projection from phase-only computer-generated hologram.
Optics Express, 2017 This paper presents a method for the implementation of speckle reduced lensless holographic projection based on phase-only computer-generated hologram (CGH). The CGH is calculated from the image by double-step Fresnel diffraction.
Chenliang Chang +4 more
semanticscholar +1 more source
3D Printing Strategies for Bioengineering Human Cornea
Advanced Healthcare Materials, EarlyView.This review highlights recent progress in 3D bioprinting strategies for engineering human corneas. Key aspects include the replication of corneal transparency, curvature, and biomechanical properties, alongside innovations in recent advancements in 3D printing methods, which benefit in overcoming current challenges.
Yunong Yuan +4 more
wiley +1 more source
Optics Express, 2017 The amount of heavy computation in Computer Generated Hologram (CGH) can be significantly reduced by pre-computing look-up tables. However, the huge memory usage of look-up tables is a major challenge.
Shuming Jiao +2 more
semanticscholar +1 more source
Advanced Materials, EarlyView.Holographic microlithography enables the fabrication of fully connected 3D liquid crystalline structures in a single exposure. The process maintains precise control over the director orientation within the entire object, preventing local director distortions typically observed in sequential printing.
Lovish Gulati +8 more
wiley +1 more source
Color multilayer holographic near-eye augmented reality display
Scientific Reports, 2023 This study demonstrates a full-color near-eye holographic display capable of superimposing color virtual scenes with 2D, 3D, and multiple objects with extended depth upon a real scene, which also has the ability to present different 3D information ...
Alejandro Velez-Zea +1 more
doaj +1 more source
Entanglement of orbital angular momentum states between an ensemble of cold atoms and a photon [PDF]
, 2006 Recently, atomic ensemble and single photons were successfully entangled by using collective enhancement [D. N. Matsukevich, \textit{et al.}, Phys. Rev. Lett. \textbf{95}, 040405(2005).], where atomic internal states and photonic polarization states were
K. Usami +6 more
core +2 more sources
Optics Express, 2017 Optical image encryption, especially double-random-phase-based, is of great interest in information security. In this work, we experimentally demonstrate the security and feasibility of optical image encryption with asymmetric double random phase and ...
Sixing Xi +7 more
semanticscholar +1 more source
Recent Advances on Thermochromic Inks for Security Applications
Advanced Materials Technologies, EarlyView.Thermochromic security inks have garnered interest in recent years as security elements for authentication, information encryption, and anti‐counterfeiting. This review outlines different types of thermochromic materials, how they have been developed as functional inks, and how advancements in property enhancement, sustainability, and printing ...
Duarte B. Oliveira +5 more
wiley +1 more source
Metalens Eyepiece for 3D Holographic Near-Eye Display
Nanomaterials, 2021 Near-eye display (NED) systems for virtual reality (VR) and augmented reality (AR) have been rapidly developing; however, the widespread use of VR/AR devices is hindered by the bulky refractive and diffractive elements in the complicated optical system ...
Chang Wang +6 more
doaj +1 more source