Results 41 to 50 of about 3,276,689 (342)
The numerical simulation tool for the MAORY multiconjugate adaptive optics system [PDF]
, 2016 The Multiconjugate Adaptive Optics RelaY (MAORY) is and Adaptive Optics module to be mounted on the ESO European-Extremely Large Telescope (E-ELT).
Agapito, Guido +16 more
core +2 more sources
Label-free adaptive optics imaging of human retinal macrophage distribution and dynamics
Proceedings of the National Academy of Sciences of the United States of America, 2020 Significance Microglia, a type of macrophage, were discovered a little more than a century ago by Pío del Río-Hortega. Since that time, we have gained an immense amount of knowledge on their origin and multifaceted function with the aid of labeling ...
D. Hammer +4 more
semanticscholar +1 more source
A SHARP view of H0LiCOW: H0 from three time-delay gravitational lens systems with adaptive optics imaging [PDF]
Monthly notices of the Royal Astronomical Society, 2019 We present the measurement of the Hubble constant, H0, with three strong gravitational lens systems. We describe a blind analysis of both PG 1115+080 and HE 0435−1223 as well as an extension of our previous analysis of RXJ 1131−1231.
G. Chen +22 more
semanticscholar +1 more source
On-sky results of the adaptive optics MACAO for the new IR-spectrograph CRIRES at VLT [PDF]
, 2006 The adaptive optics MACAO has been implemented in 6 focii of the VLT observatory, in three different flavors. We present in this paper the results obtained during the commissioning of the last of these units, MACAO-CRIRES.
Biereichel, P. +18 more
core +3 more sources
An Image-Based Alignment Errors Correction Method for Segmented Fresnel Primary Mirror
IEEE Photonics Journal, 2020 The alignment errors correction of segmented Fresnel primary mirror in multiple imaging scenes is simulated. Based on the linear relationship between five kinds of alignment errors and modulation transfer function metric or image frequency domain metric,
Licheng Zhu +5 more
doaj +1 more source
IEEE Photonics Journal, 2021 Coherent beam combination of fiber laser phased array is a promising technique to achieve high-brightness laser output. In this paper, we focus on central-lobe energy enhancement of the combined beam in the far-field by theoretically and experimentally ...
Jing Zuo +11 more
doaj +1 more source
Precision astrometry with adaptive optics [PDF]
SPIE Proceedings, 2008 We investigate the limits of ground-based astrometry with adaptive optics using the core of the Galactic globular cluster M5. Adaptive optics systems provide near diffraction-limit imaging with the world's largest telescopes. The substantial improvement in both resolution and signal-to-noise ratio enables high-precision astrometry from the ground.
Cameron, P. B. +2 more
openaire +9 more sources
Annual Review of Vision Science, 2020 High-resolution retinal imaging is revolutionizing how scientists and clinicians study the retina on the cellular scale. Its exquisite sensitivity enables time-lapse optical biopsies that capture minute changes in the structure and physiological ...
Donald T. Miller, K. Kurokawa
semanticscholar +1 more source
Wavefront sensing of atmospheric phase distortions at the Palomar 200-in. telescope and implications for adaptive optics [PDF]
, 1997 Major efforts in astronomical instrumentation are now being made to apply the techniques of adaptive optics to the correction of phase distortions induced by the turbulent atmosphere and by quasi-static aberrations in telescopes themselves.
Bloemhof, E. E. +2 more
core +1 more source
Adaptive Optics and Optical Vortices [PDF]
, 2012 The achievement of minimal angular divergence of a laser beam is one of the most impor‐ tant problems in laser physics since many laser applications demand extreme concentration of radiation. Under the beam formation in the laser oscillator or amplifier with optically in‐ homogeneous gain medium and optical elements, the divergence usually exceeds the ...
F. A. Starikov +2 more
openaire +3 more sources