Telescope simulators for Hubble: an overview of optical designs

Davila, Pamela S.; Wood, H. John; Atcheson, Paul D.; Saunders, Renee; Sullivan, Joe; Vaughan, A. H.; Saïsse, M.

doi:10.1364/ao.32.001775

Cited by 9 publications

(3 citation statements)

References 5 publications

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“…This orbit requires the lowest amount of energy for satellite location. Many satellites operate in LEO, for example, the Hubble Space Telescope [3], the International Space Station (ISS), and Earth observation satellites [4,5], since the proximity of this orbit allows them to observe clearly the surface of the Earth. Although this proposal is for Earth observation, the conceptual layout could be adapted for different purposes at different orbits.…”

Section: Design Description and Characteristicsmentioning

confidence: 99%

Conceptual Design of an On-Axis 6 m Space Telescope at the Diffraction Limit: Characteristics, Performance and Advantages

Calcines Rosario

2023

Aerospace

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This paper presents the conceptual design of an on-axis 6 metre aperture space telescope designed to cover a field of view of ±0.2 degrees with an optical quality at the diffraction limit within a spectral range between 0.5 μm and 2.5 μm. The plate scale is 3 arcsec/mm, and the overall length is less than 12 m. A Korsch layout has been selected based on the superb aberration compensation offered by Three-Mirror Anastigmat systems. The proposed design presents some characteristics: an almost flat response in RMS wavefront error across the field and for the entire spectral range; a flat mirror has been included to reduce the overall volume, and this has been adjusted to be placed at an intermediate pupil position, acting as a baffle for stray light and as a Lyott to restrict background radiation. This mirror presents a central hole, defined to the aperture of the pupil, allowing the transmission of the beam towards the image focal plane, where it can be split for multiple payloads. It also allows the transmission of the central field, at 90 degrees with respect to the science beam, to be used for Active Optics monitoring and correction of the primary mirror in order to ensure optimum optical performance. This on-axis solution significantly reduces the technical complexity for manufacturing, metrology, integration, and tests and has an important impact in the cost of the telescope.

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Section: Design Description and Characteristicsmentioning

confidence: 99%

Conceptual Design of an On-Axis 6 m Space Telescope at the Diffraction Limit: Characteristics, Performance and Advantages

Calcines Rosario

2023

Aerospace

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“…Ground-and space-based imaging surveys have provided us with a better view of the universe. For instance, the Cosmological Evolution Survey (COSMOS) [5,6] using the Hubble Space Telescope (HST) and many ground-based facilities have revolutionized the eld of galaxy evolution even though it covers only 2 square degrees of the sky. Meanwhile, spectroscopic survey telescopes with large FOV and multiplex capability also contribute signi cantly to the studies of dark energy & dark matter, stellar physics, gravitational wave cosmology, the structure and evolution of our Milky Way, and many other areas [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Conceptual Design of the Optical System of the 6.5m Wide Field MUltiplexed Survey Telescope with Excellent Image Quality

Zhang

Jiang

Shectman

et al. 2022

Preprint

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Astrophysics and cosmology in the coming decades urgently need a large field-of-view (FOV), highly multiplexed spectroscopic survey telescope satisfying challenging image quality and stability requirements. The 6.5m MUltiplexed Survey Telescope (MUST) proposed by Tsinghua University will be constructed on the Saishiteng Mountain of Northwest China to improve the spectroscopic survey capability of ground-based optical telescopes. In this paper, we demonstrate the conceptual design of the optical system of MUST. MUST will adopt a 6.5m primary mirror, a 2.45m secondary mirror, and a multiple-element widefield corrector (WFC) to ensure excellent image quality with an 80% encircled energy size of image spots less than ~ 0.6 arcsec in diameter for the entire 3° FOV and the whole 50° zenith angle range. Thanks to its compact 6.5m Ritchey-Chretien system and 20000 optical fibers on its Cassegrain focus, MUST will carry out state-of-the-art wide-field spectroscopic surveys with efficiency ~ 19 times higher than the Dark Energy Spectroscopic Instrument (DESI) using a measure proposed by Ellis et al. Upon completion around 2029, MUST will be one of the world's largest and most advanced wide-field spectroscopic survey telescopes and a new essential reference for the future development of wide-field survey telescopes. It will enable significant advances in many fields in astrophysics and cosmology.

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“…Two simulators of the aberrated HST were built to permit full verification of the COSTAR performance during its development in 1991-1993: the refractive aberrated simulator 1RAS2 by Ball Aerospace and the optical simulator Laboratoire d'Astronomie Spatiale 1OSL2 by the European Space Agency. 10 In addition, an existing structural thermal model of the FOC96 1FOC@STM2 was refurbished so as to be identical to the actual FOC96. The COSTAR was successfully installed in the HST during the 12-13 December 1993 first-servicing mission, and it provided full recovery of the image quality.…”

Section: Introductionmentioning

confidence: 99%

Modeling technique for the Hubble Space Telescope wave-front deformation

Saïsse¹,

Rousselet²,

Lazarides³

1995

Appl. Opt.

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Images from the Hubble Space Telescope suffer from an overcorrected spherical aberration that is due to a conic-constant error in the primary mirror. Within the program known as the corrective optics space telescope axial replacement (COSTAR) simulators have been built to provide the point-spread function (PSF) of the telescope alone and of the telescope with the faint-object camera F/96. It was found that the experimental PSF's were identical to those in orbit, which was not the case when the PSF's were calculated with commonly used optical software. We explain this discrepancy and propose a modeling method that is based on the determination of the wave-front error at the exit-pupil level that gives results that are consistent with observations.

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Telescope simulators for Hubble: an overview of optical designs

Cited by 9 publications

References 5 publications

Conceptual Design of an On-Axis 6 m Space Telescope at the Diffraction Limit: Characteristics, Performance and Advantages

Conceptual Design of an On-Axis 6 m Space Telescope at the Diffraction Limit: Characteristics, Performance and Advantages

Conceptual Design of the Optical System of the 6.5m Wide Field MUltiplexed Survey Telescope with Excellent Image Quality

Modeling technique for the Hubble Space Telescope wave-front deformation

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