Zobrazeno 1 - 10
of 26
pro vyhledávání: '"Todd K. Barrett"'
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
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0d69d8947ef9acc3e514d2143f7d4292
https://pubmed.ncbi.nlm.nih.gov/20820305
https://pubmed.ncbi.nlm.nih.gov/20820305
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
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::966fdd37a22e9c2aba2c5431ee0f4cdb
https://doi.org/10.1038/351300a0
https://doi.org/10.1038/351300a0
Autor:
Roberto Biasi, James H. Burge, George Z. Angeli, Chunyu Zhao, Stephen M. Miller, Francois Wildi, Roland J. Sarlot, Daniele Gallieni, Robert L. Johnson, James Roger P. Angel, Claudio Franchini, Ciro Del Vecchio, Guido Brusa-Zappellini, Richard M. Cordova, Skip Schaller, Michael Lloyd-Hart, Bruce C. Fitz-Patrick, Warren B. Davison, Todd K. Barrett, David G. Sandler, Brian L. Stamper, Mario Andrighettoni, John M. Hughes, Piero Salinari, Patrick C. McGuire, Mario Rascon, Armando Riccardi, M. Rademacher, Matthew A. Kenworthy, Cynthia J. Bresloff
Publikováno v:
SPIE Proceedings.
We will present a system to perform closed-loop optical tests of the 64 cm diameter, 336 actuator adaptive secondary made at the Steward Observatory Mirror Laboratory. Testing will include Shack-Hartmann wavefront sensing and modal correction of stat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3c292e275b20b7e4b2d9e37577b19a38
https://doi.org/10.1117/12.363598
https://doi.org/10.1117/12.363598
Autor:
Bruce C. Fitz-Patrick, David G. Sandler, Timothy J. Brinkley, James Roger P. Angel, Troy A. Rhoadarmer, Todd K. Barrett, Donald G. Bruns
Publikováno v:
SPIE Proceedings.
We report the latest progress on the design, fabrication and testing of the adaptive secondary mirror to be used in the adaptive optics system to for the 6.5m upgrade to the Steward Observatory's MMT. The adaptive secondary will use electromagnetic f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2c488af804c54e31e4ae3a3d6d98ab2b
https://doi.org/10.1117/12.321692
https://doi.org/10.1117/12.321692
Autor:
Todd K. Barrett, Donald G. Bruns, Timothy J. Brinkley, David G. Sandler, Bruce C. Fitz-Patrick, Troy A. Rhoadarmer
Publikováno v:
SPIE Proceedings.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ad27e0f8277c2a5afd083dce1bd93d03
https://doi.org/10.1117/12.321623
https://doi.org/10.1117/12.321623
Autor:
Donald W. McCarthy, David G. Sandler, James Roger P. Angel, Michael Lloyd-Hart, Stephen M. Miller, Patrick C. McGuire, Donald G. Bruns, Matthew Cheselka, Troy A. Rhoadarmer, Todd K. Barrett
Publikováno v:
SPIE Proceedings.
The Multiple Mirror Telescope (MMT) is now being replaced by a single 6.5m telescope which will have an integral adaptive optics system optimized for near IR operation. We illustrate key results obtained with low-order adaptive optics at the MMT and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::01d59911e4c2a20592f3869adfdad136
https://doi.org/10.1117/12.321743
https://doi.org/10.1117/12.321743
Autor:
Timothy J. Brinkley, Donald G. Bruns, David G. Sandler, Domingo Goyena, Guido Brusa, James Roger P. Angel, Todd K. Barrett, Hubert M. Martin
Publikováno v:
SPIE Proceedings.
The upgraded 6.5 m MMT in Arizona will use an adaptive secondary to optimize performance in the near infrared spectral region. The secondary mirror is a 2 mm thick, 640 mm diameter Zerodur shell suspended only by a flexible center hub. Three hundred
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::312a45e5dd23c1a33e282fe404186680
https://doi.org/10.1117/12.290145
https://doi.org/10.1117/12.290145
Publikováno v:
SPIE Proceedings.
We describe the control system which will be used for the adaptive optics system to be placed on the new 6.5-meter MMT. We describe the hardware used to implement the control system, and possible algorithms to accomplish the control. A real-time reco
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ce2b6149e0e3776c3460168f4678c2a1
https://doi.org/10.1117/12.290144
https://doi.org/10.1117/12.290144
Autor:
Donald G. Bruns, James Roger P. Angel, Hubert M. Martin, Guido Brusa-Zappellini, Todd K. Barrett, David G. Sandler
Publikováno v:
SPIE Proceedings.
The new 6.5 m single mirror multiple mirror telescope (MMT) will be equipped with adaptive optics capabilities to enhance high resolution infrared astronomy. Before we build the 64 cm diameter adaptive secondary, we fabricated a smaller prototype mir
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::33e8f0396443798cb85041eee25e5072
https://doi.org/10.1117/12.268969
https://doi.org/10.1117/12.268969
Publikováno v:
Acoustical Imaging ISBN: 9781461346401
Current Doppler ultrasound technology privides only two-dimensional projections of vessels or velocity patterns, is highly operator-dependent and is unable to accomplish accurate maps of the vessel lumen and flow velocity at the same time. Doppler te
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c94092efc4398c12fb7fb44037f41ca9
https://doi.org/10.1007/978-1-4419-8588-0_91
https://doi.org/10.1007/978-1-4419-8588-0_91
