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Imaging with Hexagonal Segmented Mirror [PDF]
Engineering and Technology Journal, 2012 Different hexagons configuration aperture models of the optical telescope mirror is carefully considered in this study. The point spread function and the modulation transfer function of a reference star using different hexagons configuration are computed
Fouad N. Hassan +2 more
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Design of a Segmented Mirror with a Global Radius of Curvature Actuation System: Contributions of Multiple Surrogates [PDF]
Applied Sciences, 2020 Due to fabrication difficulties, separately-polished segmented mirrors cannot meet the co-phasing surface shape error requirements in the segmented telescope system.
Songhang Wu +4 more
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Active Optics and Aberration Correction Technology for Sparse Aperture Segmented Mirrors [PDF]
Applied Sciences, 2023 Active optics and aberration correction techniques for sparse aperture segmented mirrors are studied. A finite element model of the sparse aperture segmented mirror was established, and a multi-aperture aberration polynomial was derived. According to the
Benlei Zhang +3 more
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Mirrors with regular hexagonal segments [PDF]
Applied Optics, 2003 The point-spread function and emissivity are calculated for a mirror made from regular hexagonal segments of just a few different sizes. A mirror of this type has many similar segments, which is an advantage for manufacturing, and for an approximately f/1 mirror with > or = 1000 segments and > or = 4 sizes of regular hexagons the increase in ...
Dario, Amodei, Stephen, Padin
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Polarimetric characterization of segmented mirrors
Applied Optics, 2022 We study the impact of the loss of axial symmetry around the optical axis on the polarimetric properties of a telescope with a segmented primary mirror when each segment is present in a different aging stage. The different oxidation stage of each segment as it is substituted in time leads to nonnegligible cross-talk terms.
Pastor Yabar, A. +3 more
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Photonics, 2022 As the loading space in rockets and mirror fabrication technology is limited, optical systems in space cannot have large optical apertures. However, the successful launch and excellent performance of the James Webb Telescope indicate that segmented ...
Rongjie Qin +3 more
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A Novel Axial Foldable Mechanism for a Segmented Primary Mirror of Space Telescope [PDF]
Journal of Astronomy and Space Sciences, 2015 Future space missions will have larger telescopes in order to look deeper into space while improvising on spatial resolution. The primary mirrors for these telescopes will be so large that using a monolithic mirror will be nearly impossible because of ...
Dignesh Thesiya +2 more
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Design of freeform mirrors using the concentric rings method
Heliyon, 2023 Through the methodology of optical surface design based on concentric rings, this paper proposes the design of freeform mirrors, initially by employing segmented rings, each of them with different spherical radii of curvature, and then by employing ...
Jorge González-García +2 more
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Digital Holographic Positioning Sensor for a Small Deployable Space Telescope
Applied Sciences, 2022 We propose a system and a technique to measure misalignments of individual optical elements in a deployable telescope for a small satellite, and we demonstrate its application for a 2230 mm F10.3 Ritchey–Chretien type telescope.
Eduard R. Muslimov +5 more
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Structure of distributed control system in Seimei telescope
SICE Journal of Control, Measurement, and System Integration, 2021 A segmented mirror control system is indispensable for operating an astronomical telescope which is equipped with a segmented primary mirror. In this study, we focus on the distributed control system (DCS) proposed for Seimei telescope.
Ichiro Jikuya +4 more
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