Comparison of sensitivity to beam collimation of the holographic shearing interferometer with the wedge plate shearing interferometer and the Talbot shearing interferometer

2020 ◽  
Vol 37 (9) ◽  
pp. B36 ◽  
Author(s):  
Rajiv Dubey ◽  
Raj Kumar
Keyword(s):  
Wedge Plate ◽  
Beam Collimation

Lau effect and beam collimation

1997 ◽  
Vol 44 (1) ◽  
pp. 175-178 ◽  
Author(s):  
K. V. AVUDAINAYAGAM and S. CHITRALEKHA
Keyword(s):  
Beam Collimation

Long focal length, asymmetric fan beam collimation for transmission acquisition with a triple camera SPECT system

1997 ◽  
Vol 44 (3) ◽  
pp. 1191-1196 ◽  
Author(s):  
D.R. Gilland ◽  
H. Wang ◽  
R.E. Coleman ◽  
R.J. Jaszczak
Keyword(s):  
Focal Length ◽  
Spect System ◽  
Beam Collimation

Simulation of A Wedge Plate Interferometer Using Holo Optical Elements

1991 ◽  
Vol 20 (4) ◽  
pp. 123-127
Author(s):  
K. V. Sriram ◽  
V. Parthiban ◽  
M. P. Kothiyal ◽  
R. S. Sirohi
Keyword(s):  
Optical Elements ◽  
Wedge Plate

A high-throughput assembly of beam-shaping channel-cut monochromators for laboratory high-resolution X-ray diffraction and small-angle X-ray scattering experiments

2021 ◽  
Vol 54 (3) ◽  
Author(s):  
Peter Nadazdy ◽  
Jakub Hagara ◽  
Petr Mikulik ◽  
Zdenko Zaprazny ◽  
Dusan Korytar ◽  
...  
Keyword(s):  
High Resolution ◽  
Small Angle ◽  
Photon Flux ◽  
Photon Flux Density ◽  
X Ray Diffraction ◽  
High Beam ◽  
X Ray ◽  
X Ray Scattering ◽  
Beam Collimation ◽  
Ray Scattering

A four-bounce monochromator assembly composed of Ge(111) and Ge(220) monolithic channel-cut monochromators with V-shaped channels in a quasi-dispersive configuration is presented. The assembly provides an optimal design in terms of the highest transmittance and photon flux density per detector pixel while maintaining high beam collimation. A monochromator assembly optimized for the highest recorded intensity per detector pixel of a linear detector placed 2.5 m behind the assembly was realized and tested by high-resolution X-ray diffraction and small-angle X-ray scattering measurements using a microfocus X-ray source. Conventional symmetric and asymmetric Ge(220) Bartels monochromators were similarly tested and the results were compared. The new assembly provides a transmittance that is an order of magnitude higher and 2.5 times higher than those provided by the symmetric and asymmetric Bartels monochromators, respectively, while the output beam divergence is twice that of the asymmetric Bartels monochromator. These results demonstrate the advantage of the proposed monochromator assembly in cases where the resolution can be partially sacrificed in favour of higher transmittance while still maintaining high beam collimation. Weakly scattering samples such as nanostructures are an example. A general advantage of the new monochromator is a significant reduction in the exposure time required to collect usable experimental data. A comparison of the theoretical and experimental results also reveals the current limitations of the technology of polishing hard-to-reach surfaces in X-ray crystal optics.

scholarly journals Water entry of an expanding wedge/plate with flow detachment

2016 ◽  
Vol 797 ◽  
pp. 322-344 ◽  
Author(s):  
Yuriy A. Semenov ◽  
Guo Xiong Wu
Keyword(s):  
Free Surface ◽  
General Solution ◽  
Water Entry ◽  
Hodograph Method ◽  
Fixed Length ◽  
Pressure Distributions ◽  
Initial Stage ◽  
Special Cases ◽  
Wedge Plate ◽  
Special Case

A general similarity solution for water-entry problems of a wedge with its inner angle fixed and its sides in expansion is obtained with flow detachment, in which the speed of expansion is a free parameter. The known solutions for a wedge of a fixed length at the initial stage of water entry without flow detachment and at the final stage corresponding to Helmholtz flow are obtained as two special cases, at some finite and zero expansion speeds, respectively. An expanding horizontal plate impacting a flat free surface is considered as the special case of the general solution for a wedge inner angle equal to ${\rm\pi}$. An initial impulse solution for a plate of a fixed length is obtained as the special case of the present formulation. The general solution is obtained in the form of integral equations using the integral hodograph method. The results are presented in terms of free-surface shapes, streamlines and pressure distributions.

Wedge-Plate and Rotary-Prism Cameras

Lens Design ◽  
2018 ◽  
pp. 309-315
Author(s):  
Milton Laikin
Keyword(s):  
Wedge Plate

scholarly journals Gamma beam collimation system and profile imager for ELI-NP

2019 ◽  
Vol 936 ◽  
pp. 41-42
Author(s):  
P. Cardarelli ◽  
G. Paternò ◽  
G. Di Domenico ◽  
E. Consoli ◽  
M. Marziani ◽  
...  
Keyword(s):  
Collimation System ◽  
Beam Collimation ◽  
Gamma Beam

scholarly journals Beam Collimation Using an Anisotropic Metamaterial Slab Without Any Nanometer-Sized Aperture

Plasmonics ◽  
2015 ◽  
Vol 11 (3) ◽  
pp. 803-809 ◽  
Author(s):  
Shou Zhang ◽  
Guohui Li ◽  
Yanxia Cui ◽  
Feng Zhang ◽  
Sailing He ◽  
...  
Keyword(s):  
Anisotropic Metamaterial ◽  
Beam Collimation
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