Results 21 to 30 of about 3,702 (285)
, 2022 We implement a novel limited-memory Broyden-Fletcher-Goldfarb-Shanno (L-BFGS) optimisation algorithm with cross entropy (CE) loss function, to produce phase-only computer-generated hologram (CGH) for holographic displays, with validation on a binary ...
Timothy D. Wilkinson (1305195) +3 more
core +2 more sources
Weighted Constraint Iterative Algorithm for Phase Hologram Generation
Applied 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
Binary Computer-Generated Holograms by Simulated-Annealing Binary Search
Photonics, 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
Nonplanar photolithography with computer-generated holograms [PDF]
Optics Letters, 2005 We outline a method for accomplishing photolithography on grossly nonplanar substrates. First we compute an approximation of the diffraction pattern that will produce the desired light-intensity distribution on the substrate to be patterned. This pattern is then digitized and converted into a format suitable for manufacture by a direct-write method ...
Maiden, A. +6 more
openaire +4 more sources
Challenges in using GPUs for the real-time reconstruction of digital hologram images [PDF]
, 2013 This is the pre-print version of the final published paper that is available from the link below.In-line holography has recently made the transition from silver-halide based recording media, with laser reconstruction, to recording with large-area pixel ...
Nebrensky, JJ, Reid, ID, Hobson, PR
core +1 more source
, 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 +4 more
core +1 more source
Form-birefringent computer-generated holograms [PDF]
Optics Letters, 1996 Polarization-selective computer-generated holograms made with form-birefringent nanostructures were designed, fabricated, and evaluated experimentally at 1.5 microm. The fabricated element showed a large polarization contrast ratio (>250:1) and a high diffraction efficiency (>40% for a binary phase level element).
Xu, Fang +5 more
openaire +3 more sources
Compression of Phase-Only Holograms with JPEG Standard and Deep Learning
Applied 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
Accurate Hologram Generation Using Layer-Based Method and Iterative Fourier Transform Algorithm
IEEE 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
High Resolution Multiview Holographic Display Based on the Holographic Optical Element
Micromachines, 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