Results 131 to 140 of about 714 (189)

Effect of Segmented Errors on Image Quality of Segmented Telescope

Laser and Optoelectronics Progress, 2017
李 斌 Li Bin, 唐金龙 Tang Jinlong, 于文豪 Yu Wenhao, 陈 莫 Chen Mo, 鲜 浩 Xian Hao   +4 more
exaly   +2 more sources

Numerical Simulation of Segmented Telescope

Guangxue Xuebao/Acta Optica Sinica, 2014
廖周 Liao Zhou, 邱琪 Qiu Qi, 张雨东 Zhang Yudong   +2 more
exaly   +2 more sources

Phasing a segmented telescope

Physical Review E, 2015
A crucial part of segmented or multiple-aperture systems is control of the optical path difference between the segments or subapertures. In order to achieve optimal performance we have to phase subapertures to within a fraction of the wavelength, and this requires high accuracy of positioning for each subaperture.
Irina, Paykin, Lee, Yacobi, Joan, Adler, Erez N, Ribak   +3 more
openaire   +2 more sources

Segmented telescopes for coronagraphs

SPIE Proceedings, 2004
Use of a deployable telescope will be essential if the full science objectives of the Terrestrial Planet Finder mission are to be achieved with a visible coronagraph, since the largest monolithic mirrors that can be launched into space do not have the spatial resolution required to search the habitable zone around more than ~40 of the nearest stars ...
Charles F. Lillie, Martin Flannery, Dean Dailey   +2 more
openaire   +1 more source

Rolled edges and phasing of segmented telescopes

Applied Optics, 2011
To achieve the diffraction limit, the segments in a segmented telescope must be correctly aligned to a fraction of a wavelength. This alignment is performed via optical measurements using starlight. We investigate the piston degree of freedom or phasing of the segments and the impact of rolled segment edges on the accuracy of the optical alignment ...
Natalia, Yaitskova, Mitchell, Troy
openaire   +2 more sources

Vibration damping for the Segmented Mirror Telescope

SPIE Proceedings, 2012
The Segmented Mirror Telescope (SMT) at the Naval Postgraduate School (NPS) in Monterey is a next-generation deployable telescope, featuring a 3-meter 6-segment primary mirror and advanced wavefront sensing and correction capabilities. In its stowed configuration, the SMT primary mirror segments collapse into a small volume; once on location, these ...
Maly, Joseph R., Yingling, Adam J., Griffin, Steven F., Agrawal, Brij N., Cobb, Richard G., Chambers, Trevor S.   +5 more
openaire   +2 more sources

Fresnel phasing of segmented mirror telescopes

Applied Optics, 2011
Shack-Hartmann (S-H) phasing of segmented telescopes is based upon a physical optics generalization of the geometrical optics Shack-Hartmann test, in which each S-H lenslet straddles an intersegment edge. For the extremely large segmented telescopes currently in the design stages, one is led naturally to very large pupil demagnifications for the S-H ...
Gary, Chanan, Mitchell, Troy, Isabelle, Surdej, Gary, Gutt, Lewis C, Roberts   +4 more
openaire   +2 more sources

Distributed control of large segmented telescopes

2006 American Control Conference, 2006
In this paper we conduct a preliminary study of controlling the primary mirror of a large segmented telescope. This work is motivated by the need of astronomers to study the development of structure in the Universe. First, we present some background about large segmented telescopes and our collaborative research program on large telescopes.
Shengxiang Jiang, Petros G. Voulgaris, Leland E. Holloway, Laird A. Thompson   +3 more
openaire   +1 more source

Segmented Spherical Space Telescope

Frontiers in Optics 2016, 2016
We present a space telescope concept based on a spherical primary mirror that is composed of segments mounted on small satellites that dock together. The telescope design and an on-orbit alignment approach will be discussed.
Samuel T. Thurman, Richard L. Kendrick
openaire   +1 more source

Phasing a Segmented Space Telescope

Frontiers in Optics / Laser Science, 2018
We wish to phase a segmented and sparse telescope in space, employing only wide-band light from an extended object. A stochastic search for the sharpest image lasts up to one day, for a four-segment telescope.
Erez N Ribak, B Martin Levine
openaire   +1 more source