Abstract

Direct experimental determinations of the birefringences of quartz in the 0.6–2.6μ region were made by means of channeled spectra. Up to 2.0μ, the experimentally determined birefringences of quartz were found to agree within experimental error with values obtained by subtracting from each other independently measured refractive indices, <i>n</i><sub>0</sub> and <i>n<sub>e</sub></i>, as listed in the International Critical Tables. Beyond 2.0μ, the experimentally determined birefringences gradually became appreciably smaller than the corresponding (<i>n<sub>e</sub></i>—<i>n</i><sub>0</sub>) values. The variation appears to be associated with the moderately strong absorption band of quartz, which occurs at about 3.0μ, and suggests the possible existence of two sets of birefringence values near such a band.

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References

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  1. R. M. Vanderberg, "Some aspects of dispersion of ice and gypsum in the near infrared," unpublished thesis, University of California, Los Angeles, 1954.
  2. J. W. Ellis and R. M. Vanderberg, J. Opt. Soc. Am. 44, 825 (1954).
  3. R. B. Sosman, The Properties of Silica (Chemical Catalog Company, Inc., New York, 1927), pp. 591–592. These are also the values given in the International Critical Tables (McGraw-Hill Book Company, Inc., New York), first edition, Vol. VI, pp. 341–342.
  4. F. Paschen, Ann. Physik 35, 1005–1008 (1911).
  5. E. Carvallo, Compt. rend. 126, 728–731 (1898).
  6. See reference 3, p. 645.

Carvallo, E.

E. Carvallo, Compt. rend. 126, 728–731 (1898).

Ellis, J. W.

J. W. Ellis and R. M. Vanderberg, J. Opt. Soc. Am. 44, 825 (1954).

Paschen, F.

F. Paschen, Ann. Physik 35, 1005–1008 (1911).

Sosman, R. B.

R. B. Sosman, The Properties of Silica (Chemical Catalog Company, Inc., New York, 1927), pp. 591–592. These are also the values given in the International Critical Tables (McGraw-Hill Book Company, Inc., New York), first edition, Vol. VI, pp. 341–342.

Vanderberg, R. M.

R. M. Vanderberg, "Some aspects of dispersion of ice and gypsum in the near infrared," unpublished thesis, University of California, Los Angeles, 1954.

J. W. Ellis and R. M. Vanderberg, J. Opt. Soc. Am. 44, 825 (1954).

Other (6)

R. M. Vanderberg, "Some aspects of dispersion of ice and gypsum in the near infrared," unpublished thesis, University of California, Los Angeles, 1954.

J. W. Ellis and R. M. Vanderberg, J. Opt. Soc. Am. 44, 825 (1954).

R. B. Sosman, The Properties of Silica (Chemical Catalog Company, Inc., New York, 1927), pp. 591–592. These are also the values given in the International Critical Tables (McGraw-Hill Book Company, Inc., New York), first edition, Vol. VI, pp. 341–342.

F. Paschen, Ann. Physik 35, 1005–1008 (1911).

E. Carvallo, Compt. rend. 126, 728–731 (1898).

See reference 3, p. 645.

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