scholarly journals K-edge coded aperture optimization for uniform illumination in compressive spectral X-ray tomosynthesis

2021 ◽  
Author(s):  
Tong Zhang ◽  
Shengjie Zhao ◽  
Xu Ma ◽  
Angela Cuadros ◽  
Gonzalo Arce
Keyword(s):  
Coded Aperture ◽  
Uniform Illumination ◽  
X Ray

scholarly journals Pencil beam coded aperture x-ray scatter imaging

2012 ◽  
Vol 20 (15) ◽  
pp. 16310 ◽  
Author(s):  
Kenneth MacCabe ◽  
Kalyani Krishnamurthy ◽  
Amarpreet Chawla ◽  
Daniel Marks ◽  
Ehsan Samei ◽  
...  
Keyword(s):  
Coded Aperture ◽  
Pencil Beam ◽  
X Ray

scholarly journals A coded aperture microscope for X-ray fluorescence full-field imaging

2020 ◽  
Vol 27 (6) ◽  
pp. 1703-1706
Author(s):  
D. P. Siddons ◽  
A. J. Kuczewski ◽  
A. K. Rumaiz ◽  
R. Tappero ◽  
M. Idir ◽  
...  
Keyword(s):  
Silicon Nitride ◽  
Near Field ◽  
Coded Aperture ◽  
Full Field ◽  
X Ray ◽  
Silicon Nitride Membrane ◽  
Coded Apertures ◽  
Redundant Arrays ◽  
Field Imaging ◽  
Good Contrast

The design and construction of an instrument for full-field imaging of the X-ray fluorescence emitted by a fully illuminated sample are presented. The aim is to produce an X-ray microscope with a few micrometers spatial resolution, which does not need to scan the sample. Since the fluorescence from a spatially inhomogeneous sample may contain many fluorescence lines, the optic which will provide the magnification of the emissions must be achromatic, i.e. its optical properties must be energy-independent. The only optics which fulfill this requirement in the X-ray regime are mirrors and pinholes. The throughput of a simple pinhole is very low, so the concept of coded apertures is an attractive extension which improves the throughput by having many pinholes, and retains the achromatic property. Modified uniformly redundant arrays (MURAs) with 10 µm openings and 50% open area have been fabricated using gold in a lithographic technique, fabricated on a 1 µm-thick silicon nitride membrane. The gold is 25 µm thick, offering good contrast up to 20 keV. The silicon nitride is transparent down into the soft X-ray region. MURAs with various orders, from 19 up to 73, as well as their respective negative (a mask where open and closed positions are inversed compared with the original mask), have been made. Having both signs of mask will reduce near-field artifacts and make it possible to correct for any lack of contrast.

Deconvolution systems for coded aperture images of three-dimensional x-ray objects

1975 ◽  
Vol 7 (3) ◽  
pp. 117-120 ◽  
Author(s):  
H. Weiss ◽  
E. Klotz ◽  
R. Linde
Keyword(s):  
Three Dimensional ◽  
Coded Aperture ◽  
X Ray

scholarly journals Snapshot 2D tomography via coded aperture x-ray scatter imaging

2013 ◽  
Vol 52 (19) ◽  
pp. 4582 ◽  
Author(s):  
Kenneth P. MacCabe ◽  
Andrew D. Holmgren ◽  
Martin P. Tornai ◽  
David J. Brady
Keyword(s):  
Coded Aperture ◽  
X Ray

Coded diffraction system in X-ray crystallography using a boolean phase coded aperture approximation

2018 ◽  
Vol 410 ◽  
pp. 707-716 ◽  
Author(s):  
Samuel Pinilla ◽  
Juan Poveda ◽  
Henry Arguello
Keyword(s):  
Coded Aperture ◽  
X Ray ◽  
X Ray Crystallography
Sign in / Sign up

Export Citation Format

Share Document