Results 201 to 210 of about 2,140 (245)

Wide field x-ray telescope mission

SPIE Proceedings, 2008
The Wide Field X-Ray Telescope (WFXT) will carry out an unprecedented X-ray survey of galaxy clusters and groups, AGNs and QSOs, and galaxies. WFXT is a medium-class strategic mission that will address key questions in both Cosmic Origins and Physics of the Cosmos.
Murray SS, Norman C, Ptak A, Giacconi R, Weisskopf M, Ramsey B, Bautz M, Vikhlinin A, Brandt N, ROSATI, Piero, Weaver H, Allen S, Flanagan K.   +12 more
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Construction of Wide Field Cryogenic Telescope

Experimental Astronomy, 2002
We constructed a wide field cryogenic telescope (WFCT) containing a whole Ritchey-Chretien system and a focal plane array in a cryostat for near infrared observations to cover the field of view of 0.4°. The telescope has a primary mirror of 220 mm and an engineering grade 256 × 256 InSb array.
Minoru Ando, Tetsuya Nagata, Shuji Sato, Makoto Watanabe, Kunio Itoh, Toshihide Kawai, Hidehiko Nakaya, Yoshiharu Namba, Takeshi Takezawa   +8 more
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Design and development of a wide field telescope

SPIE Proceedings, 2012
A prototype of large wide field telescope is a Cassegrain telescope which covers 2° field of view with two hyperbolic mirrors, a 0.5 m primary mirror and a 0.2 m secondary mirror with multiple correction lenses. To fulfill the optical and mechanical performance requirements in design and development phase extensive finite element analyses using NX ...
Il Moon, Sangon Lee, Juhee Lim, Ho-Soon Yang, Hyug-Gyo Rhee, Jae Bong Song, Yun Woo Lee, Jong Ung Lee, Ho Jin   +8 more
openaire   +1 more source

Wide field corrector for the KMTNet telescope

SPIE Proceedings, 2014
We present the design, assembly, alignment, and verification process of the wide field corrector for the Korea Microlensing Telescope Network (KMTNet) 1.6 meter optical telescope. The optical configuration of the KMTNet telescope is prime focus, having a wide field corrector and the CCD camera on the topside of Optical Tube Assembly (OTA).
Yongseok Lee, Sang-Mok Cha, Wade Poteet, Philip Lam, Chung-Uk Lee, Seung-Lee Kim, Byeong-Gon Park, Richard A. Buchroeder, Ho Jin   +8 more
openaire   +1 more source

Sensitivity analysis of a wide-field telescope

Journal of the Korean Physical Society, 2013
We are developing three ground-based wide-field telescopes. A wide-field Cassegrain telescope consists of two hyperbolic mirrors, aberration correctors and a field flattener for a 2-degree field of view. The diameters of the primary mirror and the secondary mirror are 500 mm and 200 mm, respectively.
Juhee Lim, Sangon Lee, Il Kweon Moon, Ho-Soon Yang, Jong Ung Lee, Young-Jun Choi, Jang-Hyun Park, Ho Jin   +7 more
openaire   +1 more source

The Discovery Channel Telescope: a wide-field telescope in Northern Arizona

SPIE Proceedings, 2004
Lowell Observatory has initiated the development of a four meter class optical telescope with significant capabilities for solar system and broad spectrum astronomical research. Key to the Discovery Channel Telescope (DCT) is the ability to rapidly switch between 2 degree FOV imaging via a prime focus camera to 30 arc min FOV instrumentation at ...
Thomas A. Sebring, Edward W. Dunham, Robert L. Millis   +2 more
openaire   +1 more source

Wide-field Fizeau imaging telescope: experimental results

Applied Optics, 2006
A nine-aperture, wide-field Fizeau imaging telescope has been built at the Lockheed-Martin Advanced Technology Center. The telescope consists of nine, 125 mm diameter collector telescopes coherently phased and combined to form a diffraction-limited image with a resolution that is consistent with the 610 mm diameter of the telescope. The phased field of
R L, Kendrick, Jean-Noel, Aubrun, Ray, Bell, Robert, Benson, Larry, Benson, David, Brace, John, Breakwell, Larry, Burriesci, Eric, Byler, John, Camp, Gene, Cross, Peter, Cuneo, Peter, Dean, Ramji, Digumerthi, Alan, Duncan, John, Farley, Andy, Green, Howard H, Hamilton, Bruce, Herman, Kris, Lauraitis, Erich, de Leon, Kenneth, Lorell, Rob, Martin, Ken, Matosian, Tom, Muench, Mel, Ni, Alice, Palmer, Dennis, Roseman, Sheldon, Russell, Paul, Schweiger, Rob, Sigler, John, Smith, Richard, Stone, David, Stubbs, Gregg, Swietek, John, Thatcher, C, Tischhauser, Harvey, Wong, Vassilis, Zarifis, Kurt, Gleichman, Rick, Paxman   +40 more
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Optical design of interferometric telescopes with wide fields of view

Applied Optics, 2006
The performance of wide-field multiple-aperture imaging systems is dominated by easily understood, low-order errors. Each aperture produces an individual image, each pair of apertures produces a set of fringes under a diffraction envelope, and the system bandwidth produces a coherence envelope.
Erin E, Sabatke, James H, Burge, Philip, Hinz   +2 more
openaire   +2 more sources

Wide field instrument preliminary design for the Wide Field InfraRed Survey Telescope

SPIE Proceedings, 2013
We present the Wide Field Infra-Red Survey Telescope (WFIRST) wide field instrument concept based on the reuse of a 2.4m telescope recently made available to NASA. Two instrument channels are described, a wide field channel (~0.8x0.4degrees, 300Mpix, imaging and spectroscopy over 0.76-2.0um), and an integral field unit (3x3 arcsec, 1Mpix, R{2pixel} ~
David A. Content, Nerses V. Armani, Charles L. Baker, Clifton E. Jackson, Duncan M. Kahle, Jeffrey W. Kruk, John P. Lehan, Mark E. Melton, Eric Mentzell, Joseph J. Miko, David J. Palace, Bert A. Pasquale, Hume L. Peabody, Brian S. Smith, Walter F. Smith, Jeffrey W. Stewart, David A. Vaughnn, Augustyn Waczynski, Thomas E. Wallace   +18 more
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Image motion analyses of a wide field telescope

Journal of the Korean Physical Society, 2012
An image motion analysis is essential for estimating the optical and the opto-mechanical performances of a wide field telescope optical system under a severe windy environment. A wide field telescope is a Richey-Chretien telescope that covers a 2° field of view with two hyperbolic mirrors, a 0.5 m primary mirror and a 0.2 m secondary mirror, and ...
Sangon Lee, Juhee Lim, Jae Heung Jo, Jong Ung Lee, Yun Woo Lee, Il Kweon Moon   +5 more
openaire   +1 more source