Results 131 to 140 of about 99,715 (244)

Improvement of Fresnel zone plate beam-profile monitor and application to ultralow emittance beam profile measurements

Physical Review Special Topics. Accelerators and Beams, 2007
We describe the improvements of a Fresnel zone plate (FZP) beam-profile monitor, which is being developed at the KEK-ATF damping ring to measure ultralow emittance electron-beam profiles.
Hiroshi Sakai, Masami Fujisawa, Kensuke Iida, Isao Ito, Hirofumi Kudo, Norio Nakamura, Kenji Shinoe, Takeo Tanaka, Hitoshi Hayano, Masao Kuriki, Toshiya Muto   +10 more
doaj   +1 more source

Method and apparatus for determining electromagnetic characteristics of large surface area passive reflectors Patent [PDF]

, 1966
Apparatus for measuring backscatter and transmission characteristics of sample segment of large spherical passive ...
Kampinsky, A.
core   +1 more source

Scalable fabrication of single- and multi-layer planar lenses on fiber imaging probes

APL Photonics
We present a novel, scalable method for fabricating single- and multi-layer planar lenses on 125 μm-diameter fiber imaging probes, demonstrating preliminary capabilities for both lateral imaging (e.g., confocal microscopy) and axial imaging, using ...
Fei He, Rafael Fuentes-Domínguez, Richard Cousins, Christopher J. Mellor, Andrew Daniel Rocha, Zuzana Adams, Jennifer K. Barton, George S. D. Gordon   +7 more
doaj   +1 more source

Experimental study on subwavelength focusing optical field detection methods for micro-Fresnel zone plate

AIP Advances
In this paper, the detection methods and detection systems for the subwavelength focusing optical field of the micro-Fresnel zone plate (FZP) are experimentally studied. First, a comparison is made between the micro/nanofabrication methods for micro-FZP,
Qiang Liu, Yuanhao Deng, Jing Xu, Junli Wang, Wenshuai Liu, Xiaomin Yao   +5 more
doaj   +1 more source

Model of in-situ focusing of extreme ultraviolet high-order harmonics from a nanostructured MgO surface

JPhys Photonics
We present a numerical model for the in-situ generation and focusing of extreme-ultraviolet (XUV) high harmonics via a Fresnel zone plate etched into a dielectric (MgO) surface.
Parnia Bastani, Aleksey Korobenko, Vedran Jelic, Jesse Thompson, Anton Rudenko, Francois Légaré, Lora Ramunno, Giulio Vampa   +7 more
doaj   +1 more source

Micro-optic lens for data storage [PDF]

A new type of microlens for data storage applications that has improved off-axis performance is described. The lens consists of a micro Fresnel pattern on a curved substrate. The radius of the substrate is equal to the focal length of the lens.
Erwin, J. Kevin, Froehlich, F. F., Milster, T. D., Trusty, R. M., Wang, M. S.   +4 more
core   +1 more source

Using a multimode fiber to improve data transfer rates

Компьютерная оптика
The possibilities of using spatial separation of channels in a multimode fiber are considered. When information is transmitted through a multimode fiber, a large number of errors arise due to mode dispersion, mode-to-mode interference and other sources ...
A.L. Timofeev , A.K. Sultanov, I.K. Meshkov, A.R. Gizatulin, V.K. Bagmanov   +4 more
doaj   +1 more source

Reference Phase of Fresnel Zone Plates

, 2003
The standard zone plate assumes that the shortest ray connecting a radiation source and a detection point has a phase of 0 deg thereby defining a reference phase. Here we examine the experimental consequences of varying this reference phase from 0 deg to 360 deg. It is concluded that reference phase is an intrinsic and useful property of zone plates.
openaire   +2 more sources

Fresnel zone plate imaging

Fresnel zone plate imaging
1978 【要旨】
openaire  

Application of Fresnel Zone Plate Focused Beam to Optimized Sensor Design for Pulse-Echo Harmonic Generation Measurements. [PDF]

Sensors (Basel), 2019
Jeong H, Shin H, Zhang S, Li X, Cho S.
europepmc   +1 more source