1 September 1990 Integrating cavity absorption meter: measurement results
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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.
© (1990) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Robin M. Pope, Edward S. Fry, Robbin L. Montgomery, Franklin M. Sogandares, "Integrating cavity absorption meter: measurement results", Proc. SPIE 1302, Ocean Optics X, (1 September 1990); doi: 10.1117/12.21443; https://doi.org/10.1117/12.21443
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