Zobrazeno 1 - 10
of 74
pro vyhledávání: '"David G. Sandler"'
Autor:
E. K. Hege, Donald W. McCarthy, Brian McLeod, Todd D. Groesbeck, Eric J. Hooper, David G. Sandler, James Roger P. Angel, Ty Martinez, Bruce P. Jacobsen, Michael Lloyd-Hart
Publikováno v:
The Astrophysical Journal. 493:950-954
Adaptive optics with a sodium resonance laser guide star was used at the Multiple Mirror Telescope (MMT) in 1996 April to image the core of the globular cluster M13 (NGC 6205). A 23'' field was recorded in the Ks band with image resolution of 051, wh
Autor:
David G. Sandler, Todd K. Barrett
Publikováno v:
Applied optics. 32(10)
An artificial-neural-network method, first developed for the measurement and control of atmospheric phase distortion, using stellar images, was used to estimate the optical aberration of the Hubble Space Telescope. A total of 26 estimates of distorti
Publikováno v:
Nature. 348:221-224
IMAGES formed by ground-based telescopes are marred by atmospheric 'seeing9. The plane wavefront from an unresolved star is distorted by continually changing turbulent fluctuations in the air's refractive index. Diffraction-limited performance can in
Publikováno v:
Scientific Applications of Neural Nets ISBN: 9783540657378
We introduce adaptive optics as a technique to improve images taken by ground-based telescopes through a turbulent blurring atmosphere. Adaptive optics rapidly senses the wavefront distortion referenced to either a natural or laser guidestar, and the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::507a1439fdee1d9f0ddf71e7c3abde8f
https://doi.org/10.1007/bfb0104278
https://doi.org/10.1007/bfb0104278
Publikováno v:
SPIE Proceedings.
Fourier Telescopy (FT) is an active imaging method which interferes spatially diverse, frequency-encoded laser beams on a distant target, and records a time history of the reflected intensity measured by a single photodetector on a large receiver. FT
Autor:
David G. Sandler, N. H. Kwong
Publikováno v:
Recent Progress in Many-Body Theories ISBN: 3540129243
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f161ab3310da1107e593ce7cd6c4a964
https://doi.org/10.1007/bfb0037567
https://doi.org/10.1007/bfb0037567
Publikováno v:
SPIE Proceedings.
High order aberrations in human eye can deteriorate visual acuity and contrast sensitivity. Such aberrations can not be corrected with traditional low-order (defocus and astigmatism) spectacles or contact lenses. A state-of-the-art adaptive optics vi
Publikováno v:
SPIE Proceedings.
A laser guided adaptive optics system called UnISIS -- University of Illinois Seeing Improvement System -- has been commissioned at the Mt. Wilson 2.5-m Telescope. The UnISIS laser guide star is created via Rayleigh scattering of 351 nm photons from
Publikováno v:
SPIE Proceedings.
We are currently building a custom adaptive optics system for viewing missile defense testing in Hawaii. The system will utilize natural target emission in the 3 - 5 micron MWIR for imagery, as well as for sensing the phase distortion caused by atmos
Publikováno v:
Nature. 351:300-302
ANGEL et al.1 recently showed how an artificial neural network could be used to measure optical phase distortion induced by atmospheric turbulence, and demonstrated by numerical simulation that such a system could be used to control the six 1.8-m mir