Results 121 to 130 of about 3,130,711 (363)
Optical Hyperlens: Far-field imaging beyond the diffraction limit [PDF]
, 2006 We propose an approach to far-field optical imaging beyond the diffraction limit. The proposed system allows image magnification, is robust with respect to material losses and can be fabricated by adapting existing metamaterial technologies in a cylindrical geometry.
arxiv +1 more source
Adaptive Optics Photoreceptor Imaging
Ophthalmology, 2012 In the present study, we investigated the cone packing density distribution along the horizontal meridian passing through the fovea in a population of young healthy subjects using a compact Adaptive Optics (AO) retinal camera (rtx1, Imagine Eyes, Orsay, France).
M Lombardo +3 more
openaire +7 more sources
Adaptive optics multiphoton microscopy [PDF]
SPIE Proceedings, 2010 We have developed an adaptive optics multiphoton microscope. The multiphoton imaging system combines an ultrafast high-power laser, a scanning unit, a motorized Z-scan device and a photon-counting detector. The adaptive optics module is composed of a Hartmann-Shack wavefront sensor and a MEMS deformable mirror.
Artal, P +2 more
openaire +3 more sources
Dispersive and dissipative coupling of photon Bose-Einstein condensates
Communications Physics, 2022 Coherently-coupled optical systems with different types of couplings between coherent centres are promising platforms for optical simulations of spin glasses and, therefore, for optical optimization.
Chris Toebes, Mario Vretenar, Jan Klaers
doaj +1 more source
The Durham ELT adaptive optics simulation platform [PDF]
arXiv, 2006 Adaptive optics systems are essential on all large telescopes where image quality is important. These are complex systems with many design parameters requiring optimisation before good performance can be achieved. The simulation of adaptive optics systems is therefore necessary to categorise the expected performance.
arxiv
A Design Study on Adaptive Primaries for 1-2 Meter Class Telescopes [PDF]
arXiv, 2021 Adaptive optics (AO) offers an opportunity to stabilize an image and maximize the spatial resolution achievable by ground based telescopes by removing the distortions due to the atmosphere. Typically, the deformable mirror in an AO system is integrated into the optical path between the secondary mirror and science instrument; in some cases, the ...
arxiv
Optics Express, 2018 Although there is an urgent demand, it is still a tremendous challenge to use the coherent optical communication technology to the satellite-to-ground data transmission system especially at large zenith angle due to the influence of atmospheric ...
Mo Chen, Chao Liu, Daoman Rui, H. Xian
semanticscholar +1 more source
Understanding and measuring mechanical signals in the tumor stroma
FEBS Open Bio, EarlyView.This review discusses cancer‐associated fibroblast subtypes and their functions, particularly in relation to extracellular matrix production, as well as the development of 3D models to study tumor stroma mechanics in vitro. Several quantitative techniques to measure tissue mechanical properties are also described, to emphasize the diagnostic and ...
Fàtima de la Jara Ortiz +3 more
wiley +1 more source
Sensors, 2020 In adaptive optics (AO), multiple different incident wavefronts correspond to a same far-field intensity distribution, which leads to a many-to-one mapping.
Xuejing Qiu +4 more
doaj +1 more source
Adaptive Optics in Star Formation [PDF]
arXiv, 2003 Over the past ten years, the concept of adaptive optics has evolved from early experimental stages to a standard observing tool now available at almost all major optical and near-infrared telescope facilities. Adaptive optics will also be essential in exploiting the full potential of the large optical/infrared interferometers currently under ...
arxiv