Results 91 to 100 of about 574,892 (287)
An experimental Rayleigh laser guide star ground layer adaptive optics system for the William Herschel telescope [PDF]
, 2005 The design of an experimental ground layer adaptive optics (GLAO) system that uses a low altitude Rayleigh laser guide star as a wavefront reference source is presented.
Morris, T J, Morris, T. J.
core
Freeform Micro-Optical Elements—Recent Production Techniques, Opportunities and Challenges
MicroFreeform optics belong to the increasingly important elements in optical research and industry, which pose several challenges regarding design and highly precise manufacturing.
Tomasz Blachowicz +4 more
doaj +1 more source
Integrated Optics in Astronomical Interferometry [PDF]
Symposium - International Astronomical Union, 1994 Integrated optical components (mostly single-mode fibers and couplers) can be used to achieve several functions that are needed in interferometry: coherent beam transportation and recombination, pathlength modulation and control for fringe tracking and double Fourier interferometry, spatial filtering of the wavefront and interferogram calibration ...
openaire +1 more source
Advanced Science, EarlyView.Combining template stripping with a graphene‐inspired transfer yields continuous, transferable gold films at 6‐inch wafer scale with thicknesses approaching the atomic limit. The atomically smooth, near‐bulk‐quality films offer above 86% transmittance and sub‐20 Ω/square sheet resistance, serving as a universal platform for flexible optoelectronics ...
Dmitry Yakubovsky +24 more
wiley +1 more source
Plaid‐Like Spin Splitting and Chirality of Magnon Bands in Antiferromagnetic MnTe2
Advanced Science, EarlyView.Helicity‐ and angle‐resolved Raman spectroscopy reveals chiral magnons in the non‐coplanar antiferromagnet MnTe 2. Combined with first‐principles calculations and spin‐wave theory, the results establish its altermagnetic character through circular Raman dichroism, reduced rotational symmetry, and a distinctive plaid‐like momentum‐space magnon spin ...
Dirk Wulferding +10 more
wiley +1 more source
Advanced Science, EarlyView.Complex microarchitectures emerge from simple flow‐driven transformations as static mixers iteratively reorient and split material domains. Coupled with diverse deposition strategies, chaotic printing provides an accessible platform for fabricating architected materials that support biologically and chemically relevant processes. ABSTRACT Nature builds
Edna Johana Bolívar‐Monsalve +7 more
wiley +1 more source
Kirkpatrick Baez X-ray optics for astrophysics: Recent status [PDF]
, 2018 © 2018 Astronomical Institute, Slovak Academy of Sciences. X-ray optics in Kirkpatrick Baez arrangement represent promising alternative to Wolter optics in common use.
core
Automatic Compressive Sensing of Shack–Hartmann Sensors Based on the Vision Transformer
PhotonicsShack–Hartmann wavefront sensors (SHWFSs) are crucial for detecting distortions in adaptive optics systems, but the accuracy of wavefront reconstruction is often hampered by low guide star brightness or strong atmospheric turbulence.
Qingyang Zhang +4 more
doaj +1 more source
Structural Colors from Modulated Topological Defects in Molecular Smectic Liquid Crystals
Advanced Science, EarlyView.Rather than using dyes and pigments, nature produces the colors of some butterflies and beetles through optical interference phenomena. This study describes an original biomimetic strategy exploiting the spontaneous formation of modulated linear defects in thin films of 8CB, a common molecular liquid crystal.
Camille N. Mahyaoui +7 more
wiley +1 more source
On-sky Demonstration of Second-stage Wave-front Control with a Photonic Lantern
The Astronomical JournalGround-based direct imaging of exoplanets at high contrast requires precise correction of atmospheric turbulence using adaptive optics (AO). The planet-to-star contrast ratio at small angular separations from the host star is often limited by non-common ...
Aditya R. Sengupta +16 more
doaj +1 more source