Cryogenic optical performance of a lightweighted mirror assembly for future space astronomical telescopes: correlating optical test results and thermal optical model

Eng, Ron; Arnold, William R.; Baker, Markus A.; Bevan, Ryan M.; Burdick, Gregory; Effinger, Michael R.; Gaddy, Darrell; Goode, Brian K.; Hanson, Craig D.; Hogue, William; Kegley, Jeffrey R.; Kirk, Charlie; Maffett, Steven P.; Matthews, Gary; Siler, Richard; Smith, W. S.; Stahl, H. Philip; Tucker, John M.; Wright, Ernest R.

doi:10.1117/12.2025393

Cited by 11 publications

(5 citation statements)

References 5 publications

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“…We conducted trade studies for 4-m and 8-m mirror systems; created and validated models to predict gravity sag and 2C thermal gradients; defined and started implemented a systems analysis framework that combines simulation results from multiple engineering disciplines to predict on-orbit optical performance. 3,7 Our 1.5 year results were published in 8 papers at the 2013 SPIE Optics & Photonics Symposia (see Bibliography).…”

Section: Amtd Phasementioning

confidence: 91%

Advanced mirror technology development (AMTD) project: 2.5 year status

et al. 2014

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The Advance Mirror Technology Development (AMTD) project is in Phase 2 of a multiyear effort, initiated in FY12, to mature by at least a half TRL step six critical technologies required to enable 4 meter or larger UVOIR space telescope primary mirror assemblies for both general astrophysics and ultra-high contrast observations of exoplanets. AMTD continues to achieve all of its goals and accomplished all of its milestones to date. We have done this by assembling an outstanding team from academia, industry, and government with extensive expertise in astrophysics and exoplanet characterization, and in the design/manufacture of monolithic and segmented space telescopes; by deriving engineering specifications for advanced normal-incidence mirror systems needed to make the required science measurements; and by defining and prioritizing the most important technical problems to be solved.

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Section: Amtd Phasementioning

confidence: 91%

Advanced mirror technology development (AMTD) project: 2.5 year status

et al. 2014

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“…The thermal expansion of ceramic, silicon, and SiC optical substrate materials was also investigated in regard to Herschel (2009-2013) observatory [15]. In particular, SiC is one of the most investigated materials for an observatory in cryogenic environment [8,71,[73][74][75].…”

Section: Thermal Processesmentioning

confidence: 99%

Mirrors for Space Telescopes: Degradation Issues

et al. 2020

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Mirrors are a subset of optical components essential for the success of current and future space missions. Most of the telescopes for space programs ranging from earth observation to astrophysics and covering the whole electromagnetic spectrum from x-rays to far-infrared are based on reflective optics. Mirrors operate in diverse and harsh environments that range from low-earth orbit to interplanetary orbits and deep space. The operational life of space observatories spans from minutes (sounding rockets) to decades (large observatories), and the performance of the mirrors within the mission lifetime is susceptible to degrading, resulting in a drop in the instrument throughput, which in turn affects the scientific return. Therefore, the knowledge of potential degradation mechanisms, how they affect mirror performance, and how to prevent them is of paramount importance to ensure the long-term success of space telescopes. In this review, we report an overview of current mirror technology for space missions with a focus on the importance of the degradation and radiation resistance of coating materials. Special attention is given to degradation effects on mirrors for far and extreme UV, as in these ranges the degradation is enhanced by the strong absorption of most contaminants.

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“…The thermal expansion of ceramic, silicon and SiC optical substrate materials was also investigated in regard to Herschel (2009-2013) observatory [15]. In particular, SiC is one of the most investigated materials for an observatory in cryogenic environment [71][72] [8,69] [73].…”

Section: Thermal Processesmentioning

confidence: 99%

Mirrors for Space Telescopes: Degradation Issues

Garoli¹,

Marcos²,

Larruquert³

et al. 2020

Preprint

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Mirrors are a subset of optical components essential for the success of current and future space missions. Most of the telescopes for space programs ranging from Earth Observation to Astrophysics and covering the whole electromagnetic spectrum from X-rays to Far-Infrared are based on reflective optics. Mirrors operate in diverse and harsh environments that range from Low-Earth Orbit, to interplanetary orbits and the deep space. The operational life of space observatories spans from minutes (sounding rockets) to decades (large observatories), and the performance of the mirrors within the mission lifetime is susceptible to degrade, which results in a drop of the instrument throughput, which in turn affects the scientific return. Therefore, the knowledge of potential degradation mechanisms, how they affect mirror performance, and how to prevent them is of paramount importance to ensure the long-term success of space telescopes. In this review we report an overview on current mirror technology for space missions with a focus on the importance of degradation and radiation resistance of the coating materials. A special attention will be given to degradation effects on mirrors for the far and extreme UV as in these ranges the degradation is enhanced by the strong absorption of most contaminants.

show abstract

Cryogenic optical performance of a lightweighted mirror assembly for future space astronomical telescopes: correlating optical test results and thermal optical model

Cited by 11 publications

References 5 publications

Advanced mirror technology development (AMTD) project: 2.5 year status

Advanced mirror technology development (AMTD) project: 2.5 year status

Mirrors for Space Telescopes: Degradation Issues

Mirrors for Space Telescopes: Degradation Issues

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