Abstract

A statistically designed study was performed to evaluate the homogeneity of selected properties of a large CER-VIT C-101 glass–ceramic mirror blank. A blank 1.9 m in diameter and 0.3 m thick weighing ~2180 kg was sampled to determine if the chemical composition, the density, the birefringence, and the linear coefficient of thermal expansion were dependent on the position within the blank. The blank had good homogeneity. The properties varied little throughout the blank, except for birefringence, which varied systematically with position.

© 1970 Optical Society of America

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References

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  1. P. W. McMillan, Glass-Ceramics (Academic Press Inc., New York, 1964).
  2. G. A. Simmons, Opt. Spectra 1, 25 (1967).
  3. W. G. Cochran, G. M. Cox, Experimental Designs (John Wiley & Sons, Inc., New York, 1957).
  4. J. E. Rapp, 1968 NBS Symposium on Thermal Expansion of Solids. (To be published in the NBS Symposium Proceedings.)
  5. W. J. Dixon, F. J. Massey, Introduction to Statistical Analysis (McGraw-Hill Book Co., New York, 1957).
  6. J. B. Foote, Owens-Illinois, Inc., private communication.

1967 (1)

G. A. Simmons, Opt. Spectra 1, 25 (1967).

Cochran, W. G.

W. G. Cochran, G. M. Cox, Experimental Designs (John Wiley & Sons, Inc., New York, 1957).

Cox, G. M.

W. G. Cochran, G. M. Cox, Experimental Designs (John Wiley & Sons, Inc., New York, 1957).

Dixon, W. J.

W. J. Dixon, F. J. Massey, Introduction to Statistical Analysis (McGraw-Hill Book Co., New York, 1957).

Foote, J. B.

J. B. Foote, Owens-Illinois, Inc., private communication.

Massey, F. J.

W. J. Dixon, F. J. Massey, Introduction to Statistical Analysis (McGraw-Hill Book Co., New York, 1957).

McMillan, P. W.

P. W. McMillan, Glass-Ceramics (Academic Press Inc., New York, 1964).

Rapp, J. E.

J. E. Rapp, 1968 NBS Symposium on Thermal Expansion of Solids. (To be published in the NBS Symposium Proceedings.)

Simmons, G. A.

G. A. Simmons, Opt. Spectra 1, 25 (1967).

Opt. Spectra (1)

G. A. Simmons, Opt. Spectra 1, 25 (1967).

Other (5)

W. G. Cochran, G. M. Cox, Experimental Designs (John Wiley & Sons, Inc., New York, 1957).

J. E. Rapp, 1968 NBS Symposium on Thermal Expansion of Solids. (To be published in the NBS Symposium Proceedings.)

W. J. Dixon, F. J. Massey, Introduction to Statistical Analysis (McGraw-Hill Book Co., New York, 1957).

J. B. Foote, Owens-Illinois, Inc., private communication.

P. W. McMillan, Glass-Ceramics (Academic Press Inc., New York, 1964).

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Figures (6)

Fig. 1
Fig. 1

Sampling pattern.

Fig. 2
Fig. 2

Sampling pattern.

Fig. 3
Fig. 3

Sampling—chemical analysis.

Fig. 4
Fig. 4

Expansivity vs temperature for vertical samples.

Fig. 5
Fig. 5

Expansivity vs temperature for horizontal samples.

Fig. 6
Fig. 6

Birefringence (mμ/cm).

Equations (3)

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top 2.5084 ± 0.0001 , middle 2.5082 ± 0.0001 , bottom 2.5079 ± 0.0001.
top 0.15 ± 0.04 × 10 7 / ° C , middle 0.16 ± 0.06 × 10 7 / ° C , bottom 0.06 ± 0.03 × 10 7 / ° C .
top 1.61 ± 0.11 × 10 7 / ° C , middle 1.80 ± 0.11 × 10 7 / ° C , bottom 1.74 ± 0.11 × 10 7 / ° C .

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