Kodak AMSD mirror program: overview and cryo test results

Matthews, Gary; Barrett, David; Bolton, James; Dahl, Roger W.; Michaels, E. L.; Mallette, Mark; Johnson, Joshua

doi:10.1117/12.505181

Cited by 7 publications

(4 citation statements)

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“…Cryogenic mirrors have been demonstrated to change figure as they are cooled. [14,15,16,17] This has often been attributed to material non-uniformity and in some cases adhesives (epoxy/CFRP or frit/glass); specifically thermal expansion properties. This type of aberration can lead to erroneous wavefront measurement in under sampled optical measurements.…”

Section: Potential Impact Of Cryo-quiltingmentioning

confidence: 99%

Herschel Space Telescope: Optical test and model correlation

Doyle

2009

2009 IEEE Aerospace Conference

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Subsequent to the cyrogenic optical testing of the 3.5 m silicon carbide ESA Herschel Space Telescope, a discrepancy between the prediction and measurement of the telescope back focal length was identified. Efforts to resolve this discrepancy involved both improvements to modeling and more thorough examination of the optical test techniques. The most significant input to modeling was the use of extremely precise cryogenic strain measurements. The optical test methods were extensively analyzed for accuracy, sensitivity, and systematic errors. Model results, error budgets, test results, and conclusions will be presented and discussed. 1, 2

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Section: Potential Impact Of Cryo-quiltingmentioning

confidence: 99%

Herschel Space Telescope: Optical test and model correlation

Doyle

2009

2009 IEEE Aerospace Conference

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“…3). 9 , 25 , 26 The Kodak approach also assumed cryo-null polishing to remove both correctable and uncorrectable cryo-deformations.…”

Section: Mirror Technology Developmentmentioning

confidence: 99%

Webb Space Telescope primary mirror development: summary and lessons learned

Stahl

2024

J. Astron. Telesc. Instrum. Syst.

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The primary mirror is central to the success of the Webb Space Telescope and the product of 100s of engineers and technologists who invented technologies and processes for its manufacture and test. We summarize the Webb mirror technology development program, explain how the technology was demonstrated to be TRL-6 (including the importance of an Engineering Development Unit), and list some of the author's personal lessons learned.

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“…The Kodak AMSD mirror program studying ULE options, including wavefront error in cryogenic vacuum, were published. 39 The 3.5 m SiC Hershel telescope was cryogenically tested and discrepancies between the FEM and the physical performance of the system were identified, studied, and published. 40 West et al 2010 41 combined some of these development areas and studied the launch survival of 4 m borosilicate primary mirrors and introduced the concepts of thermal figuring for honeycomb borosilicate space mirrors and the use of off-axis stars for guiding and wavefront sensing.…”

Section: History Of Astronomical Space Telescope Researchmentioning

confidence: 99%

Approaches to lowering the cost of large space telescopes

Douglas,

Aldering,

Allan

et al. 2023

Astronomical Optics: Design, Manufacture, and Test of Space and Ground Systems IV

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New development approaches, including launch vehicles and advances in sensors, computing, and software, have lowered the cost of entry into space, and have enabled a revolution in low-cost, high-risk Small Satellite (SmallSat) missions. To bring about a similar transformation in larger space telescopes, it is necessary to reconsider the full paradigm of space observatories. Here we will review the history of space telescope development and cost drivers, and describe an example conceptual design for a low cost 6.5 m optical telescope to enable new science when operated in space at room temperature. It uses a monolithic primary mirror of borosilicate glass, drawing on lessons and tools from decades of experience with ground-based observatories and instruments, as well as flagship space missions. It takes advantage, as do large launch vehicles, of increased computing power and space-worthy commercial electronics in low-cost active predictive control systems to maintain stability. We will describe an approach that incorporates science and trade study results that address driving requirements such as integration and testing costs, reliability, spacecraft jitter, and wavefront stability in this new risk-tolerant "LargeSat" context.

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Kodak AMSD mirror program: overview and cryo test results

Cited by 7 publications

References 0 publications

Herschel Space Telescope: Optical test and model correlation

Herschel Space Telescope: Optical test and model correlation

Webb Space Telescope primary mirror development: summary and lessons learned

Approaches to lowering the cost of large space telescopes

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