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Applied Optics

Applied Optics


  • Vol. 44, Iss. 26 — Sep. 10, 2005
  • pp: 5549–5560

Practical test of a point-source integrating cavity absorption meter: the performance of different collector assemblies

Rüdiger Röttgers, Wolfgang Schönfeld, Peter-Rüdiger Kipp, and Roland Doerffer  »View Author Affiliations

Applied Optics, Vol. 44, Issue 26, pp. 5549-5560 (2005)

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A prototype point-source integrating cavity absorption meter (PSICAM) is presented and compared with spectrophotometric absorption measurements. Different light collector assemblies of the PSICAM were tested regarding their capability to determine the absorption of water constituents accurately over a wide range of concentrations and scattering properties. The PSICAM setup with a radiance-type sensor showed the best performance. It was compared with a photometric absorption determination using nonscattering dye solutions. The mean difference between both methods was less than 2.4% in the spectral range of 400–700 nm. The absorption determination with the PSICAM, when equipped with a radiance sensor as a light collector, was only little affected by scattering and temperature. We conclude that the PSICAM can be used to determine the absorption of natural seawater samples at ambient temperatures.

© 2005 Optical Society of America

OCIS Codes
(010.4450) Atmospheric and oceanic optics : Oceanic optics
(120.3150) Instrumentation, measurement, and metrology : Integrating spheres
(120.4640) Instrumentation, measurement, and metrology : Optical instruments
(300.1030) Spectroscopy : Absorption

Original Manuscript: December 3, 2004
Revised Manuscript: April 1, 2005
Manuscript Accepted: April 5, 2005
Published: September 10, 2005

Rüdiger Röttgers, Wolfgang Schönfeld, Peter-Rüdiger Kipp, and Roland Doerffer, "Practical test of a point-source integrating cavity absorption meter: the performance of different collector assemblies," Appl. Opt. 44, 5549-5560 (2005)

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