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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 12, Iss. 3 — Mar. 1, 1973
  • pp: 564–568

Infrared Optical Constants of Ammonium Sulfate, Sahara Dust, Volcanic Pumice, and Flyash

Frederic E. Volz  »View Author Affiliations


Applied Optics, Vol. 12, Issue 3, pp. 564-568 (1973)
http://dx.doi.org/10.1364/AO.12.000564


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Abstract

Spectra of the real and imaginary parts of the refractive index m = n′ − in″ from 2.5 μm to 40 μm of ammonium sulfate, Sahara dust (as collected at Barbados), volcanic dust (pumice), and dust from a coal-fired power plant are presented. With a peak absorption index n″ = 1.0 at 10 μm Sahara dust turns out to be the strongest absorber in the atmospheric window. The dispersion of n′ is also very pronounced near 9 μm and 20 μm. Volcanic and coal-fire dust also absorb in the window region stronger than most of our earlier-investigated more normal aerosol fractions. The data for ammonium sulfate are compared with Remsberg’s measurements on an aqueous solution.

© 1973 Optical Society of America

History
Original Manuscript: September 7, 1972
Published: March 1, 1973

Citation
Frederic E. Volz, "Infrared Optical Constants of Ammonium Sulfate, Sahara Dust, Volcanic Pumice, and Flyash," Appl. Opt. 12, 564-568 (1973)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-12-3-564

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