Results 41 to 50 of about 69,883 (320)

Numerical Investigation on Magnetically Actuated Tunable Micro Liquid Lens [PDF]

MATEC Web of Conferences, 2020
In this paper, magnetically actuated tunable liquid lens is fundamentally studied to have further potential application scope in research, industrial, aeronautical and astronautical areas.
Wu Shi-Hua, Zhu Gui-Ping, Huang Hu-Lin
doaj   +1 more source

Pixelated Reconstruction of Foreground Density and Background Surface Brightness in Gravitational Lensing Systems Using Recurrent Inference Machines

The Astrophysical Journal, 2023
Modeling strong gravitational lenses in order to quantify distortions in the images of background sources and to reconstruct the mass density in foreground lenses has been a difficult computational challenge.
Alexandre Adam, Laurence Perreault-Levasseur, Yashar Hezaveh, Max Welling   +3 more
doaj   +1 more source

Quantum Uncertainty Considerations for Gravitational Lens Interferometry

, 2008
The measurement of the gravitational lens delay time between light paths has relied, to date, on the source having sufficient variability to allow photometric variations from each path to be compared. However, the delay times of many gravitational lenses
Carico, David P., Doyle, Laurance R.
core   +1 more source

CLASS B2108+213: A new wide separation gravitational lens system [PDF]

, 2004
We present observations of CLASS B2108+213, the widest separation gravitational lens system discovered by the Cosmic Lens All-Sky Survey. Radio imaging using the VLA at 8.46 GHz and MERLIN at 5 GHz shows two compact components separated by 4.56 arcsec ...
Biggs, A. D., Blandford, R. D., Browne, I. W. A., de Bruyn, A. G., Fassnacht, C. D., Jackson, N. J., Koopmans, L. V. E., Mao, S., McKean, J. P., Myers, S. T., Norbury, M. A., Pearson, T. J., Phillips, P. M., Readhead, A. C. S., Rusin, D., Treu, T., Wilkinson, P. N., York, T. D.   +17 more
core   +4 more sources

Self-consistent gravitational lens reconstruction [PDF]

Monthly Notices of the Royal Astronomical Society, 1998
We present a new method for directly determining accurate, self-consistent cluster lens mass and shear maps in the strong lensing regime from the magnification bias of background galaxies. The method relies upon pixellisation of the surface mass density distribution which allows us to write down a simple, solvable set of equations.
Andy Taylor, Simon Dye
openaire   +3 more sources

The Effects of Massive Substructures on Image Multiplicities in Gravitati onal Lenses

, 2003
Surveys for gravitational lens systems have typically found a significantly larger fraction of lenses with four (or more) images than are predicted by standard ellipsoidal lens models (50% versus 25-30%).
C. S. Kochanek, J. D. Cohn, Jaffe W., King L. J., Kochanek C. S., Patnaik A. R., Seitz S.   +6 more
core   +3 more sources

B0850+054: a new gravitational lens system from CLASS [PDF]

, 2002
We report the discovery of a new gravitational lens system from the CLASS survey. Radio observations with the VLA, the WSRT and MERLIN show that the radio source B0850+054 is comprised of two compact components with identical spectra, a separation of 0.7
A. C. S. Readhead, A. D. Biggs, A. G. De Bruyn, C. D. Fassnacht, Chae, D. Rusin, I. W. A. Browne, J. P. McKean, K.- H. Chae, L. V. E. Koopmans, M. A. Norbury, N. J. Jackson, P. M. Phillips, P. N. Wilkinson, R. D. Blandford, S. T. Myers, T. J. Pearson   +16 more
core   +3 more sources

The Effects of Finite Distance on the Gravitational Deflection Angle of Light

Universe, 2019
In order to clarify the effects of the finite distance from a lens object to a light source and a receiver, the gravitational deflection of light has been recently reexamined by using the Gauss−Bonnet (GB) theorem in differential geometry (Ishihara
Toshiaki Ono, Hideki Asada
doaj   +1 more source

Gravitational lens interference

The Astrophysical Journal, 1991
The consequence of the existence, when a lens is present, of two propagation paths from a source to the observer is investigated. Attention is focused on quasars as background sources; however, the results received are general and apply to pulsars and stellar sources as well. 12 refs.
Toby Falk, J. B. Peterson
openaire   +2 more sources

Self‐Assembled Heterosymmetric Structure with Tunable Polarization Optics for Reversible Matrix Encryption

Advanced Functional Materials, EarlyView.
Sustainable films with heterosymmetric structures, harmoniously integrating symmetry and asymmetry, are fabricated using cellulose nanocrystals and hydrophilic nanolignin via evaporation‐induced self‐assembly, which exhibit excellent multiple polarization optical properties.
Qun Song, Xintong Meng, Caoxing Huang, Mingcong Xu, Tao Chen, Ziwei Zhou, Philipp Vana, Kai Zhang   +7 more
wiley   +1 more source