Changes in surface figure due to thermal hysteresis

S. F. Jacobs; S. C. Johnston; J. M. Sasian; M. Watson; J. D. Targove; D. Bass

doi:10.1117/12.967424

Changes in surface figure due to thermal hysteresis

S. F. Jacobs, S. C. Johnston, J. M. Sasian, M. Watson, J. D. Targove, D. Bass

Research output: Contribution to journal › Article › peer-review

Abstract

Thermal cycling hysteresis affects surface figure in low-expansivity mirror substrates. Zerodur, ULE, and Cer-Vit 8-in.-diameter mirrors and dilatometer samples were thermally cycled at uniform rates of 6 K/hr and 60 K/hr, and somewhat faster for nonuniform heating. Figure distortions as large as Λ/10 were observed following nonuniform heating of standard Zerodur, which was the only material exhibiting thermal hysteresis. A new experimental Zerodur appears to be free of this problem.

Original language	English (US)
Pages (from-to)	193-203
Number of pages	11
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	817
DOIs	https://doi.org/10.1117/12.967424
State	Published - Jan 1 1987

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Applied Mathematics
Electrical and Electronic Engineering

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title = "Changes in surface figure due to thermal hysteresis",

abstract = "Thermal cycling hysteresis affects surface figure in low-expansivity mirror substrates. Zerodur, ULE, and Cer-Vit 8-in.-diameter mirrors and dilatometer samples were thermally cycled at uniform rates of 6 K/hr and 60 K/hr, and somewhat faster for nonuniform heating. Figure distortions as large as Λ/10 were observed following nonuniform heating of standard Zerodur, which was the only material exhibiting thermal hysteresis. A new experimental Zerodur appears to be free of this problem.",

author = "Jacobs, {S. F.} and Johnston, {S. C.} and Sasian, {J. M.} and M. Watson and Targove, {J. D.} and D. Bass",

note = "Funding Information: We express our appreciation to O. Lindig (Schott), C. Neufeld (Perkin-Elmer), T. Brock (Owens-Illinois), and H. Hagy (Corning) for their assistance in obtaining sample materials. In addition we thank Prof. J. Wyant for the use of WISP software, Prof. R. Shoemaker for administrative guidance, R. Sumner and R. Barreda for optical work, and D. Watson for thermal cycling of the samples. We gratefully acknowledge the support of the US Air Force.",

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doi = "10.1117/12.967424",

language = "English (US)",

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T1 - Changes in surface figure due to thermal hysteresis

AU - Jacobs, S. F.

AU - Johnston, S. C.

AU - Sasian, J. M.

AU - Watson, M.

AU - Targove, J. D.

AU - Bass, D.

N1 - Funding Information: We express our appreciation to O. Lindig (Schott), C. Neufeld (Perkin-Elmer), T. Brock (Owens-Illinois), and H. Hagy (Corning) for their assistance in obtaining sample materials. In addition we thank Prof. J. Wyant for the use of WISP software, Prof. R. Shoemaker for administrative guidance, R. Sumner and R. Barreda for optical work, and D. Watson for thermal cycling of the samples. We gratefully acknowledge the support of the US Air Force.

PY - 1987/1/1

Y1 - 1987/1/1

N2 - Thermal cycling hysteresis affects surface figure in low-expansivity mirror substrates. Zerodur, ULE, and Cer-Vit 8-in.-diameter mirrors and dilatometer samples were thermally cycled at uniform rates of 6 K/hr and 60 K/hr, and somewhat faster for nonuniform heating. Figure distortions as large as Λ/10 were observed following nonuniform heating of standard Zerodur, which was the only material exhibiting thermal hysteresis. A new experimental Zerodur appears to be free of this problem.

AB - Thermal cycling hysteresis affects surface figure in low-expansivity mirror substrates. Zerodur, ULE, and Cer-Vit 8-in.-diameter mirrors and dilatometer samples were thermally cycled at uniform rates of 6 K/hr and 60 K/hr, and somewhat faster for nonuniform heating. Figure distortions as large as Λ/10 were observed following nonuniform heating of standard Zerodur, which was the only material exhibiting thermal hysteresis. A new experimental Zerodur appears to be free of this problem.

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JO - Proceedings of SPIE - The International Society for Optical Engineering

JF - Proceedings of SPIE - The International Society for Optical Engineering

ER -

Changes in surface figure due to thermal hysteresis

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