Results 31 to 40 of about 99,715 (244)
Zoom liquid lens employing a multifocal Fresnel zone plate.
Optics Express, 2021 We propose a zoom liquid lens employing a multifocal Fresnel zone plate. The proposed lens has two optical surfaces: liquid-liquid interface and Fresnel zone plate.
Lei Li +4 more
semanticscholar +1 more source
Nature Communications, 2022 X-ray diffractive and refractive optical elements suffer from chromatic aberrations, limiting high-resolution X-ray microscopes mainly to bright synchrotron sources.
Adam Kubec +5 more
doaj +1 more source
Fluorescence microscopy imaging with a Fresnel zone plate array based optofluidic microscope. [PDF]
Lab Chip, 2011 We report the implementation of an on-chip microscope system, termed fluorescence optofluidic microscope (FOFM), which is capable of fluorescence microscopy imaging of samples in fluid media.
Pang S, Han C, Lee LM, Yang C.
europepmc +3 more sources
Axial intensity distribution of a micro-Fresnel zone plate at an arbitrary numerical aperture.
Optics Express, 2021 The axial focus number (the number of focal spots along the axial direction) and focus intensity of a micro-Fresnel zone plate (FZP) are analyzed from deep ultraviolet to infrared using the Fourier decomposition, the vectorial angular spectrum (VAS ...
Qiang Liu +5 more
semanticscholar +1 more source
Pinhole Zone Plate Lens for Ultrasound Focusing
Sensors, 2017 The focusing capabilities of a pinhole zone plate lens are presented and compared with those of a conventional Fresnel zone plate lens. The focusing properties are examined both experimentally and numerically.
Constanza Rubio +5 more
doaj +1 more source
High frequency focal transducer with a Fresnel zone plate for intravascular ultrasound
Applied Physics Letters, 2021 The diameter of an intravascular ultrasound (IVUS) catheter is always less than 1 mm, because it must be inserted into a blood vessel to obtain ultrasound images.
Min Su +7 more
semanticscholar +1 more source
Deployable Fresnel Zone Plate Antenna for CubeSats
IGARSS 2023 - 2023 IEEE International Geoscience and Remote Sensing Symposium, 2023 Earth observation satellite missions are becoming increasingly important and have been also boosted by the appearance of small satellites, affordable to small companies and universities. Technology miniaturization and the reduction in power consumption have been a key point in the reduction of the dimensions of these spacecrafts, being able to ...
Garcia Morilla, Alejandro +7 more
openaire +1 more source
Optimized square Fresnel zone plates for microoptics applications [PDF]
, 2009 Polygonal Fresnel zone plates with a low number of sides have deserved attention in micro and nanoptics, because they can be straightforwardly integrated in photonic devices, and, at the same time, they represent a balance between the high-focusing ...
Alda, Javier +3 more
core +1 more source
Design of Fresnel Lens-Type Multi-Trapping Acoustic Tweezers
Sensors, 2016 In this paper, acoustic tweezers which use beam forming performed by a Fresnel zone plate are proposed. The performance has been demonstrated by finite element analysis, including the acoustic intensity, acoustic pressure, acoustic potential energy ...
You-Lin Tu +2 more
doaj +1 more source
High-efficiency focusing and imaging by dielectric kinoform zone plate lenses with soft X-rays
Journal of Synchrotron Radiation, 2023 With fast advances in enhancing the focusing/imaging resolution of Fresnel zone plate lenses toward sub-10 nm, low diffraction efficiency in connection with their rectangular zone shape still remains a big issue in both soft and hard X-ray microscopy. In
Xujie Tong +9 more
doaj +1 more source