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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 9, Iss. 9 — Sep. 1, 1970
  • pp: 2140–2142

Integrating Cavity Spectroscopy

P. Elterman  »View Author Affiliations


Applied Optics, Vol. 9, Issue 9, pp. 2140-2142 (1970)
http://dx.doi.org/10.1364/AO.9.002140


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Abstract

This paper describes the application of the integrating sphere or cavity to the measurement of the absorption coefficient (cm−1) of a material introduced into the cavity. The absorption coefficient is determined by measuring the decrease in the radiation density within the integrating cavity caused by insertion of the sample. This method has the virtue of being independent of the scattering within the material sample, the reflectivity of the material surface, and the geometry of the sample. The method is particularly attractive for materials with small absorption coefficients. Experimental verification of the method is described showing agreement with direct transmittance measurements to within ±10%.

© 1970 Optical Society of America

History
Original Manuscript: December 12, 1969
Published: September 1, 1970

Citation
P. Elterman, "Integrating Cavity Spectroscopy," Appl. Opt. 9, 2140-2142 (1970)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-9-9-2140


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References

  1. J. W. T. Walsh, Photometry (Constable, London, 1953), pp. 141, 259.
  2. F. A. Benford, General Electric Rev., 23, 72 (1920).
  3. J. Strong, Concepts of Classical Optics (Freeman, San Francisco, 1958), pp. 58–60.
  4. See Ref. 1, pp. 278–280.
  5. F. Grum, G. W. Luckey, Appl. Opt. 7, 2289 (1968). [CrossRef] [PubMed]

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