Results 221 to 230 of about 4,937,607 (303)
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Active optics strategy for the alignment and operation of the European Solar Telescope
Astronomical Telescopes + Instrumentation, 2022The European Solar Telescope (EST) is an on-axis 4.2-meter solar telescope, the largest solar telescope ever built in Europe. While operating, environmental effects, such as gravity, wind buffeting or thermal loads, will generate wavefront errors that ...
M. Belío-Asín +8 more
semanticscholar +1 more source
Alignment of DECam-like large survey telescope for real-time active optics and error analysis
, 2021To obtain relatively high imaging quality in the whole field of view and simultaneously create petabytes of data with a high signal-to-noise ratio, the alignment requirements for the dark energy camera (DECam)-like wide field active optics survey ...
An Qichang +10 more
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Rubin Observatory active optics system status
Astronomical Telescopes + Instrumentation, 2020The Vera C. Rubin Observatory is now under construction on Cerro Pachon in Chile. This ground-based facility is designed to conduct the Legacy Survey of Space and Time (LSST), which is a decade-long time-domain optical survey of the night sky. The system
S. Thomas +8 more
semanticscholar +1 more source
Active Optics for Space Telescopes
Optical Design and Fabrication 2019 (Freeform, OFT), 2019Active optics has been proposed for application to space telescopes since the mid 1960s since it can help to relax manufacturing tolerances while guaranteeing diffraction-limited image quality, correct for thermal gradients and any errors due to launch ...
N. Devaney
semanticscholar +2 more sources
Development of space active optics for a whiffletree supported mirror.
Applied Optics, 2019The requirements of a lightweight primary mirror for large-aperture space telescopes include a precise mirror figure and high reliability. However, lightweight mirrors are easily affected by environmental disturbances, as they lack structural stability ...
Pingwei Zhou +3 more
semanticscholar +1 more source
Kirkpatrick-Baez active optics system at FERMI: system performance analysis.
Journal of Synchrotron Radiation, 2019FERMI is the first and only seeded EUV-SXR free-electron laser (FEL) facility available to users; it operates at Elettra - Sincrotrone Trieste (Italy) and it presents five operating endstations.
L. Raimondi +7 more
semanticscholar +1 more source
Journal of Modern Optics, 1989
In ‘Active Optics II’, the active correction of a 1 m test mirror was described in detail. A residual aberration term was found which still required correction in order to achieve the aim of the experiment: removal of all systematic defects leaving only statistical or high-frequency noise. The present paper describes the interferometric confirmation of
R.N. Wilson +4 more
openaire +1 more source
In ‘Active Optics II’, the active correction of a 1 m test mirror was described in detail. A residual aberration term was found which still required correction in order to achieve the aim of the experiment: removal of all systematic defects leaving only statistical or high-frequency noise. The present paper describes the interferometric confirmation of
R.N. Wilson +4 more
openaire +1 more source
Conference on Spatial Atmospheric Marine Environmental Optics
This paper proposes the implementation of a self-deformation estimation strategy for an active mirror within a framework of mechanoelectrical sensing. This architecture can collaborate with conventional optical wavefront sensors in a complementary manner,
Chuyue Yu, Kainan Wang
semanticscholar +1 more source
This paper proposes the implementation of a self-deformation estimation strategy for an active mirror within a framework of mechanoelectrical sensing. This architecture can collaborate with conventional optical wavefront sensors in a complementary manner,
Chuyue Yu, Kainan Wang
semanticscholar +1 more source
Development of a prototype active optics system for future space telescopes.
Applied Optics, 2018It is envisaged that future large space telescopes will be lightweight and employ active optics to maintain optical quality throughout the mission lifetime.
N. Devaney +4 more
semanticscholar +1 more source
Journal of Modern Optics, 1991
This paper is the fourth, and last, in the series on active optics as realized in the ESO New Technology Telescope (NTT). It gives a detailed description of the set-up and optimization of the optical system, based on the three levels (i.e. time frequencies) of active correction. The first results in direct imagery with the telescope optimized only near
R.N. Wilson +3 more
openaire +1 more source
This paper is the fourth, and last, in the series on active optics as realized in the ESO New Technology Telescope (NTT). It gives a detailed description of the set-up and optimization of the optical system, based on the three levels (i.e. time frequencies) of active correction. The first results in direct imagery with the telescope optimized only near
R.N. Wilson +3 more
openaire +1 more source