Abstract

Current plans for space exploration are calling for more information about materials—at ever lower temperatures. The University of Arizona is making a 2-m prototype mirror for the Next Generation Space Telescope (NGST) to operate at 35 K.1 Previous low temperature measurements of thermal expansion have been limited to temperatures down to 77 K, except for the very low temperature studies of White et al.2,3,4

© 1999 Optical Society of America

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References

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  1. J.H. Burge et al., “Lightweight Mirror Technology Using a Thin Facesheet With Active Rigid Support,” Proc. SPIE3356(SPIE Press, Bellingham, WA, 1998) (in press).
    [CrossRef]
  2. G.K. White, “Thermal expansion at low temperatures of glass-ceramics and glasses,” Cryogenics 16,487 (1976).
    [CrossRef]
  3. R.B. Roberts et al.., “Thermal properties of Zerodur at low temperatures,” Cryogenics 22,566 (1982).
    [CrossRef]
  4. S.J. Collocott, G.K. White, “Heat capacity and thermal expansion of Zerodur and Zerodur M at low temperatures,” Cryogenics 31,102 (1991).
    [CrossRef]
  5. S.G. Jacobs et al., “Thermal expansion uniformity of materials for large telescope mirrors,” Appl. Opt. 23,4237 (1984).
    [CrossRef] [PubMed]
  6. S.G. Jacobs, D. Bass, “Improved dimensional stability of Corning 9600 and Schott Zerodur glass ceramics,” Appl. Opt. 28,4045 (1989).
    [CrossRef] [PubMed]

1991 (1)

S.J. Collocott, G.K. White, “Heat capacity and thermal expansion of Zerodur and Zerodur M at low temperatures,” Cryogenics 31,102 (1991).
[CrossRef]

1989 (1)

1984 (1)

1982 (1)

R.B. Roberts et al.., “Thermal properties of Zerodur at low temperatures,” Cryogenics 22,566 (1982).
[CrossRef]

1976 (1)

G.K. White, “Thermal expansion at low temperatures of glass-ceramics and glasses,” Cryogenics 16,487 (1976).
[CrossRef]

Bass, D.

Burge, J.H.

J.H. Burge et al., “Lightweight Mirror Technology Using a Thin Facesheet With Active Rigid Support,” Proc. SPIE3356(SPIE Press, Bellingham, WA, 1998) (in press).
[CrossRef]

Collocott, S.J.

S.J. Collocott, G.K. White, “Heat capacity and thermal expansion of Zerodur and Zerodur M at low temperatures,” Cryogenics 31,102 (1991).
[CrossRef]

Jacobs, S.G.

Roberts, R.B.

R.B. Roberts et al.., “Thermal properties of Zerodur at low temperatures,” Cryogenics 22,566 (1982).
[CrossRef]

White, G.K.

S.J. Collocott, G.K. White, “Heat capacity and thermal expansion of Zerodur and Zerodur M at low temperatures,” Cryogenics 31,102 (1991).
[CrossRef]

G.K. White, “Thermal expansion at low temperatures of glass-ceramics and glasses,” Cryogenics 16,487 (1976).
[CrossRef]

Appl. Opt. (2)

Cryogenics (3)

G.K. White, “Thermal expansion at low temperatures of glass-ceramics and glasses,” Cryogenics 16,487 (1976).
[CrossRef]

R.B. Roberts et al.., “Thermal properties of Zerodur at low temperatures,” Cryogenics 22,566 (1982).
[CrossRef]

S.J. Collocott, G.K. White, “Heat capacity and thermal expansion of Zerodur and Zerodur M at low temperatures,” Cryogenics 31,102 (1991).
[CrossRef]

Other (1)

J.H. Burge et al., “Lightweight Mirror Technology Using a Thin Facesheet With Active Rigid Support,” Proc. SPIE3356(SPIE Press, Bellingham, WA, 1998) (in press).
[CrossRef]

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Figures (4)

Figure 1
Figure 1

Measured thermal expansion of four materials −300 to 10 K.

Figure 2
Figure 2

CTE of six materials −300 to 10 K.

Figure 3
Figure 3

CTE of six materials, −300 to 10 K, showing region of Zerodur instability.

Figure 4
Figure 4

Details of Zerodur instability.

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