Zobrazeno 1 - 10
of 69
pro vyhledávání: '"Gary, Chanan"'
Autor:
Gary Chanan
Publikováno v:
Vol. 54, Issue 1 (Obituaries, News & Commentaries, Community Reports). 54
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e766cdd1a7b767b507f57e43649bbf44
https://doi.org/10.3847/25c2cfeb.f789e35e
https://doi.org/10.3847/25c2cfeb.f789e35e
Publikováno v:
Applied optics. 61(4)
The design of extremely large segmented-mirror telescopes (ELTs) calls for their segments to be phased, and a number of different interferometric techniques have been proposed in the literature for this purpose. To achieve the required large capture
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::93e11f4a2aa63295e86ecf5c539ae777
https://pubmed.ncbi.nlm.nih.gov/35201063
https://pubmed.ncbi.nlm.nih.gov/35201063
Autor:
Mitchell Troy, Gary Chanan
Publikováno v:
Ground-based and Airborne Telescopes VII.
The narrowband segment phasing algorithm that was originally developed at Keck was replaced many years ago by a broadband algorithm that, although slower and less accurate than the former, has proved to be much more robust. A thorough investigation i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::48ecb9be13e33f64e19a6780fd79e539
https://doi.org/10.1117/12.2310157
https://doi.org/10.1117/12.2310157
Publikováno v:
Ground-based and Airborne Telescopes VII.
The Keck telescope segments were manufactured by stressed mirror polishing of large circular pieces of Zerodur that were then cut into hexagons and finished by Ion Beam Figuring (IBF). It has long been believed that this process results in segments w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::75afdca28ecf485301b8db89f5b9e4eb
https://doi.org/10.1117/12.2314568
https://doi.org/10.1117/12.2314568
Publikováno v:
SPIE Proceedings.
The narrowband phasing algorithm that was originally developed at Keck has largely been replaced by a broad- band algorithm that, although it is slower and less accurate than the former, has proved to be much more robust. A systematic investigation i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8fb8220afb55493e514c949d17358b9d
https://doi.org/10.1117/12.2230748
https://doi.org/10.1117/12.2230748
Autor:
Gary Chanan
Publikováno v:
Physics Today. 71:65-65
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::424d7b9d42a0a738c415bf8f0d31aed8
https://doi.org/10.1063/pt.3.3854
https://doi.org/10.1063/pt.3.3854
Publikováno v:
SPIE Proceedings.
We have developed an integrated optical model of the semi-static performance of the Thirty Meter Telescope. The model includes surface and rigid body errors of all telescope optics as well as a model of the Alignment and Phasing System Shack-Hartmann
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::12eb5dad7dae2d4429d1ad71a1e2edda
https://doi.org/10.1117/12.2057157
https://doi.org/10.1117/12.2057157
Publikováno v:
SPIE Proceedings.
We quantify the accuracy of the Keck telescope segment surface figure measurements made on sky by the Phasing Camera System (PCS), a Shack-Hartmann wavefront sensor that uses long integration times to average over the effects of atmospheric turbulenc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4998837c0a275fe4da362d5fb30e9167
https://doi.org/10.1117/12.2057094
https://doi.org/10.1117/12.2057094
Publikováno v:
Planets, Stars and Stellar Systems ISBN: 9789400756205
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::06b93fb075d9ad513c54b67a9e7c4cd1
https://doi.org/10.1007/978-94-007-5621-2_3
https://doi.org/10.1007/978-94-007-5621-2_3
Autor:
Gary Chanan
Publikováno v:
SPIE Proceedings.
A variety of algorithms utilized in the alignment of segmented telescopes were developed for and implemented on the Keck telescopes in the 1990s. The algorithms associated with the Keck segmented primary mirrors are very similar to those that will be
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::65f4dde6e9c763e93957c2dea1123785
https://doi.org/10.1117/12.926712
https://doi.org/10.1117/12.926712