scholarly journals Emulation of X-ray Light-Field Cameras

2020 ◽  
Vol 6 (12) ◽  
pp. 138
Author(s):  
Nicola Viganò ◽  
Felix Lucka ◽  
Ombeline de La Rochefoucauld ◽  
Sophia Bethany Coban ◽  
Robert van Liere ◽  
...  
Keyword(s):  
Parameter Space ◽  
Field Data ◽  
Light Field ◽  
Three Dimensions ◽  
Light Fields ◽  
Single Shot ◽  
Spatial Structures ◽  
Single Exposure ◽  
X Ray ◽  
Plenoptic Imaging

X-ray plenoptic cameras acquire multi-view X-ray transmission images in a single exposure (light-field). Their development is challenging: designs have appeared only recently, and they are still affected by important limitations. Concurrently, the lack of available real X-ray light-field data hinders dedicated algorithmic development. Here, we present a physical emulation setup for rapidly exploring the parameter space of both existing and conceptual camera designs. This will assist and accelerate the design of X-ray plenoptic imaging solutions, and provide a tool for generating unlimited real X-ray plenoptic data. We also demonstrate that X-ray light-fields allow for reconstructing sharp spatial structures in three-dimensions (3D) from single-shot data.

scholarly journals Reconstruction of multispectral images from spectrally coded light fields of flat scenes

2019 ◽  
Vol 86 (12) ◽  
pp. 758-764
Author(s):  
Maximilian Schambach ◽  
Fernando Puente León
Keyword(s):  
Light Field ◽  
Real Life ◽  
Microlens Array ◽  
Light Fields ◽  
Multispectral Images ◽  
Single Exposure ◽  
Line Production ◽  
Reconstruction Quality ◽  
Novel Method ◽  
Production Monitoring

AbstractWe present a novel method to reconstruct multispectral images of flat objects from spectrally coded light fields as taken by an unfocused light field camera with a spectrally coded microlens array. In this sense, the spectrally coded light field camera is used as a multispectral snapshot imager, acquiring a multispectral datacube in a single exposure. The multispectral image, corresponding to the light field’s central view, is reconstructed by shifting the spectrally coded subapertures onto the central view according to their respective disparity. We assume that the disparity of the scene is approximately constant and non-zero. Since the spectral mask is identical for all subapertures, the missing spectral data of the central view will be filled up from the shifted spectrally coded subapertures. We investigate the reconstruction quality for different spectral masks and camera parameter sets optimized for real life applications such as in-line production monitoring for which the constant disparity constraint naturally holds. For synthesized reference scenes, using 16 color channels, we achieve a reconstruction \mathrm{PSNR} of up to 51 dB.

scholarly journals Toward unsupervised single-shot diffractive imaging of heterogeneous particles using X-ray free-electron lasers

2013 ◽  
Vol 21 (23) ◽  
pp. 28729 ◽  
Author(s):  
Hyung Joo Park ◽  
N. Duane Loh ◽  
Raymond G. Sierra ◽  
Christina Y. Hampton ◽  
Dmitri Starodub ◽  
...  
Keyword(s):  
Free Electron ◽  
Single Shot ◽  
Free Electron Lasers ◽  
Diffractive Imaging ◽  
X Ray

Submicron scale image observation with a grazing incidence reflection-type single-shot soft X-ray microscope

2014 ◽  
Vol 53 (8) ◽  
pp. 080302 ◽  
Author(s):  
Motoyoshi Baba ◽  
Masaharu Nishikino ◽  
Noboru Hasegawa ◽  
Takuro Tomita ◽  
Yasuo Minami ◽  
...  
Keyword(s):  
Grazing Incidence ◽  
Single Shot ◽  
X Ray ◽  
Submicron Scale

scholarly journals Single shot x-ray diffractometry in SACLA with pulsed magnetic fields up to 16 T

2020 ◽  
Vol 2 (4) ◽  
Author(s):  
Akihiko Ikeda ◽  
Yasuhiro H. Matsuda ◽  
Xuguang Zhou ◽  
Takeshi Yajima ◽  
Yuya Kubota ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Single Shot ◽  
Pulsed Magnetic Fields ◽  
X Ray

X-ray-induced acoustic computed tomography (XACT) imaging with single-shot nanosecond x-ray

2021 ◽  
Vol 119 (18) ◽  
pp. 183702
Author(s):  
Siqi Wang ◽  
Vassili Ivanov ◽  
Prabodh Kumar Pandey ◽  
Liangzhong Xiang
Keyword(s):  
Computed Tomography ◽  
Single Shot ◽  
X Ray

In situ reactor to image catalysts at work in three-dimensions by Bragg coherent X-ray diffraction

2019 ◽  
Vol 336 ◽  
pp. 169-173 ◽  
Author(s):  
Amélie Rochet ◽  
Ana Flávia Suzana ◽  
Aline R. Passos ◽  
Tiago Kalile ◽  
Felisa Berenguer ◽  
...  
Keyword(s):  
Three Dimensions ◽  
X Ray Diffraction ◽  
X Ray

scholarly journals Capsule design for the National Ignition Facility

1999 ◽  
Vol 17 (2) ◽  
pp. 217-224 ◽  
Author(s):  
T.R. DITTRICH ◽  
S.W. HAAN ◽  
M.M. MARINAK ◽  
D.E. HINKEL ◽  
S.M. POLLAINE ◽  
...  
Keyword(s):  
Dopant Concentration ◽  
Three Dimensions ◽  
Initial Surface ◽  
National Ignition Facility ◽  
X Ray ◽  
Ongoing Effort ◽  
Surface Finishes ◽  
Material Homogeneity ◽  
Indirect Drive ◽  
Reduced Scale

Several choices exist in the design and production of capsules intended to ignite and propagate fusion burn of the deuterium–tritium (D–T) fuel when imploded by indirect drive at the National Ignition Facility (NIF). These choices include ablator material, ablator dopant concentration and distribution, capsule dimensions, and X-ray drive profile (shock timings and strengths). The choice of ablator material must also include fabrication and material characteristics, such as attainable surface finishes, permeability, strength, transparency to radio frequency and infrared radiation, thermal conductivity, and material homogeneity. Understanding the advantages and/or limitations of these choices is an ongoing effort for LLNL and LANL designers. At this time, simulations in one-, two-, and three-dimensions show that capsules with either a copper-doped beryllium or a polyimide (C22H10N2O4) ablator material have both the least sensitivity to initial surface roughnesses and favorable fabrication qualities. Simulations also indicate the existence of capsule designs based on these ablator materials which ignite and burn when imploded by less than nominal laser performance (900-kJ energy, 250-TW power, producing 250-eV peak radiation temperature). We will describe and compare these reduced-scale capsules, in addition to several designs which use the expected 300-eV peak X-ray drive obtained from operating the NIF laser at 1.3 MJ and 500 TW.

Alternative edge illumination set-up for single-shot X-ray phase contrast imaging

2018 ◽  
Vol 124 (16) ◽  
pp. 164906 ◽  
Author(s):  
Cui Zhang ◽  
Xiaodong Pan ◽  
Hongjie Shang ◽  
Gongping Li
Keyword(s):  
Phase Contrast ◽  
Phase Contrast Imaging ◽  
Single Shot ◽  
Contrast Imaging ◽  
X Ray ◽  
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