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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 25, Iss. 10 — Oct. 1, 1935
  • pp: 330–331

Optimum Grain Size in the Christiansen Filter

H. S. DENMARAK and WILLOUGHBY M. CADY  »View Author Affiliations

JOSA, Vol. 25, Issue 10, pp. 330-331 (1935)

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The width at half-maximum of the band transmitted by a Christiansen filter has been measured for ten wave-lengths, and for glass grains of six sizes in ethyl salicylate. With a cell 7.5 mm thick, the grain size affording the narrowest bands was found to be about 0.7 mm, depending somewhat upon wave-length. Bands have been observed in the violet, having a width at half-maximum as narrow as 8 to 1OA, the transmission at peak being about 40 percent.

H. S. DENMARAK and WILLOUGHBY M. CADY, "Optimum Grain Size in the Christiansen Filter," J. Opt. Soc. Am. 25, 330-331 (1935)

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  1. Christiansen, Wied. Ann. 23, 298 (1884); 24, 439 (1885).
  2. Elvegard, Staude and Weigert, Zeits. f. physik. Chemie B2, 149 (1929).
  3. von Fragstein, Ann. d. Physik 17, 22 (1933).
  4. McAlister, Smithsonian Misc. Coll. 93, No. 7 (1935).

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