Results 81 to 90 of about 93,717 (313)
Phase sensor for solar adaptive-optics [PDF]
, 2011 Wavefront sensing in solar adaptive-optics is currently done with correlating Shack-Hartmann sensors, although the spatial- and temporal-resolutions of the phase measurements are then limited by the extremely fast computing required to correlate the sensor signals at the frequencies of daytime atmospheric-fluctuations.
arxiv +1 more source
Focus diverse phase retrieval testbed development of continuous wavefront sensing for space telescope applications [PDF]
arXiv, 2023 Continuous wavefront sensing on future space telescopes allows relaxation of stability requirements while still allowing on-orbit diffraction-limited optical performance. We consider the suitability of phase retrieval to continuously reconstruct the phase of a wavefront from on-orbit irradiance measurements or point spread function (PSF) images.
arxiv
Collaborative development of diffraction-limited beamline optical systems at US DOE light sources [PDF]
, 2019 An ongoing collaboration among four US Department of Energy (DOE) National Laboratories has demonstrated key technology prototypes and software modeling tools required for new high-coherent flux beamline optical systems. New free electron laser (FEL) and
Assoufid, L +17 more
core
Spatially Controlled Optical Vortex Generation Using Low‐Loss Antimony Telluride Metasurfaces
Advanced Photonics Research, EarlyView.The spatially varying vortex beams with the customizable propagation trajectory and the controllable topological charge evolution are demonstrated using the Sb2Te3‐based plasmonic metasurfaces. Benefiting from the dispersion‐free property of the Pancharatnam–Berry phase and the broadband response of polarization conversion efficiency of the nanobrick ...
Chengsen Yang +11 more
wiley +1 more source
Differential optical transfer function wavefront sensing [PDF]
Optical Engineering, 2013 13 pages, 14 figures. Open access in Optical Engineering.
openaire +4 more sources
, 2018 Precision wavefront control on future segmented-aperture space telescopes presents significant challenges, particularly in the context of high-contrast exoplanet direct imaging.
Cahoy, Kerri L. +6 more
core +1 more source
Digitized Phase‐Change Material Heterostack for Transmissive Diffractive Optical Neural Network
Advanced Photonics Research, EarlyView.A phase‐change‐material‐based digitized heterostack is experimentally demonstrated and theoretically analyzed for future energy‐efficient, fast reconfigured, and compact transmissive diffractive optical neural networks. All‐optical and fully reconfigurable transmissive diffractive optical neural network (DONN) architectures emerge as high‐throughput ...
Ruiyang Chen +3 more
wiley +1 more source
Wavefront Sensing and Control with the Many Headed Hydra Modal Basis [PDF]
arXiv, 2022 The future of space and ground based telescopes is intimately tied to technology and algorithm development surrounding wavefront sensing and control. Only with cutting edge developments and unusual ideas will we be able to build diffraction limited observatories on the ground that contend with earth-atmosphere, as well as space-based observatories that
arxiv
Ingot Laser Guide Stars Wavefront Sensing
, 2017 We revisit one class of z-invariant WaveFront sensor where the LGS is fired aside of the telescope aperture. In this way there is a spatial dependence on the focal plane with respect to the height where the resonant scattering occurs. We revise the basic
Bergomi, Maria +13 more
core +1 more source
Advanced Photonics Research, EarlyView.This work presents a systematic review of atmospheric turbulence fundamentals, including theoretical formulations and adaptive optics‐based mitigation strategies. This includes an in‐depth examination of the devices, theories, and methodologies associated with traditional correction approaches.
Qinghui Liu +5 more
wiley +1 more source