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Proceedings Paper

Integrating cavity absorption meter: measurement results
Author(s): Robin M. Pope; Edward S. Fry; Robbin L. Montgomery; Franklin M. Sogandares
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Paper Abstract

Accurate measurement of the optical absorption coefficient for both pure and natural waters has been complicated by the effects of scattering particulates. A new absorption meter which eliminates the systematic effects of scattering has been developed. This device, hereafter referred to as the Integrating Cavity Absorption Meter or ICAM, offers the advantages of being simple, sensitive, rugged, and capable of In situ measurements. The theoretical basis is sound and well oc1 Five versions of the ICAM have been constructed, calibrated, and tested. Effects of scattering have been tested experimentally and have been found to be negligible up to very high concentrations. Very precise results for aqueous suspensions are obtained when the absorption of pure water is assumed and is used for the calibration. However, using a less rigorous calibration procedure the absolute absorption of pure water can also be obtained. The results for the absorption spectrum of pure water throughout the visible compare favorably with accepted values.

Paper Details

Date Published: 1 September 1990
PDF: 11 pages
Proc. SPIE 1302, Ocean Optics X, (1 September 1990); doi: 10.1117/12.21443
Show Author Affiliations
Robin M. Pope, Texas A&M Univ. (United States)
Edward S. Fry, Texas A&M Univ. (United States)
Robbin L. Montgomery, Texas A&M Univ. (United States)
Franklin M. Sogandares, Texas A&M Univ. (United States)

Published in SPIE Proceedings Vol. 1302:
Ocean Optics X
Richard W. Spinrad, Editor(s)

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