Results 101 to 110 of about 30,667 (264)
Single-atom trapping in holographic 2D arrays of microtraps with arbitrary geometries
, 2014 We demonstrate single-atom trapping in two-dimensional arrays of microtraps with arbitrary geometries. We generate the arrays using a Spatial Light Modulator (SLM), with which we imprint an appropriate phase pattern on an optical dipole trap beam prior ...
Barredo, Daniel +7 more
core +5 more sources
Pupil Plane Multiplexing for Vectorial Fourier Ptychography
Laser &Photonics Reviews, EarlyView.This study proposes a cost‐effective, modality‐adaptive multichannel microscopy framework using pupil‐plane multiplexing. A custom pupil aperture at the Fourier plane encodes channel‐specific transfer functions with spectral or polarization filters, and model‐based reconstruction with channel‐dependent priors decodes them.
Hyesuk Chae +5 more
wiley +1 more source
Wavefront analysis and phase correctors design using SHADOW
Journal of Synchrotron RadiationKnife-edge imaging is a successful method for determining the wavefront distortion of focusing optics such as Kirkpatrick–Baez mirrors or compound refractive lenses.
Hossein Khosroabadi +3 more
doaj +1 more source
Deformable Membrane Mirror for Wavefront Correction
Defence Science Journal, 2009 Deformable or adaptive mirrors are used in modern adaptive optics systems for direct correction of the aberrations in the light wavefront. Conventional deformable mirrors used for this purpose are expensive electromechanical devices. Deformable membrane mirror fabricated using microelectromechanical systems (MEMS) technology is a low cost, compact ...
Amita Gupta +5 more
openaire +1 more source
Anomalous‐Energy Runaway Electrons Originating in Fast Ionisation Wave During Pulsed Gas Breakdown
High Voltage, EarlyView.ABSTRACT Anomalous‐energy runaway electrons (RAEs), whose energy exceeds the maximum potential difference across the discharge gap, are widely observed in various plasma phenomena. This study investigates the origination of anomalous‐energy RAEs in fast ionisation waves (FIWs) formed during pulsed gas breakdown.
Bangdou Huang +4 more
wiley +1 more source
Adaptive optics wavefront correction using a damped transpose matrix of the influence function. [PDF]
Photonics Res, 2022 Gu B, Zhang Y.
europepmc +1 more source
Framework for X‐ray mirror surface shape fitting
Journal of Synchrotron Radiation, EarlyView.The closed‐form expressions for elliptic cylinders, hyperbolic cylinders, ellipsoids, hyperboloids, and diaboloids used for X‐ray mirror surface shapes are summarized. Additionally, a four‐layer framework to fit the measured surface shape data in slope or height for convenient X‐ray mirror surface characterization is proposed.For accurate ...
Lei Huang +9 more
wiley +1 more source
Telescopes Alignment Using the Sharpness Function Method Based on Undersampled Images
IEEE Photonics Journal, 2019 In astronomy, the images are sometimes undersampled. In the previous research works, image reconstructions have to be employed to recover the lost information from a set of undersampled images to achieve a high-resolution image using dithering or drizzle
Min Li, Xin Liu, Ang Zhang, Hao Xian
doaj +1 more source
Wavefront Refraction and Correction [PDF]
Optometry and Vision Science, 2014 Ray, Applegate +8 more
openaire +2 more sources
Demonstration of a family of X‐ray dark‐field retrieval approaches on a common set of samples
Journal of Synchrotron Radiation, EarlyView.This study aims to guide users of dark‐field imaging in selecting the most suitable technique for their imaging goals. To this end, we provide a summary table and highlight opportunities for future research into the sources of dark‐field contrast across emerging methods.There are various imaging setups capable of capturing dark‐field images, each with ...
Samantha J. Alloo +5 more
wiley +1 more source