Abstract

A phase-contrast refractometer for measurements in the infrared has been constructed. The optical and mechanical arrangement is discussed and a brief description of the experimental procedure is given. A value for (<i>n</i>-1) of air of 0.00026834 was obtained for the 1.014-µ line of mercury. The standard deviation of the mean is ±0.7%.

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References

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  1. E. Ingelstam, Nature 168, 960 (1951).
  2. E. Ingelstam, Arkiv. Fysik 6, 29 (1953).
  3. E. Djurle, Appl. Sci. Research B4 (1954).
  4. W. S. Rodney and E. Djurle, Report October 30, 1957, Institute of Optical Research, Stockholm 70, Sweden.
  5. B. Edlén, J. Opt. Soc. Am. 43, 339 (1953).
  6. R. Penndorf, J. Opt. Soc. Am. 47, 176 (1957).

Djurle, E.

E. Djurle, Appl. Sci. Research B4 (1954).

W. S. Rodney and E. Djurle, Report October 30, 1957, Institute of Optical Research, Stockholm 70, Sweden.

Edlén, B.

B. Edlén, J. Opt. Soc. Am. 43, 339 (1953).

Ingelstam, E.

E. Ingelstam, Arkiv. Fysik 6, 29 (1953).

E. Ingelstam, Nature 168, 960 (1951).

Penndorf, R.

R. Penndorf, J. Opt. Soc. Am. 47, 176 (1957).

Rodney, W. S.

W. S. Rodney and E. Djurle, Report October 30, 1957, Institute of Optical Research, Stockholm 70, Sweden.

Other (6)

E. Ingelstam, Nature 168, 960 (1951).

E. Ingelstam, Arkiv. Fysik 6, 29 (1953).

E. Djurle, Appl. Sci. Research B4 (1954).

W. S. Rodney and E. Djurle, Report October 30, 1957, Institute of Optical Research, Stockholm 70, Sweden.

B. Edlén, J. Opt. Soc. Am. 43, 339 (1953).

R. Penndorf, J. Opt. Soc. Am. 47, 176 (1957).

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