The Development of an Integrating Cavity Absorption Meter to Measure Optical Absorption of Pure Waters and Suspended Particulates
TEXAS A AND M UNIV COLLEGE STATION DEPT OF PHYSICS
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The Integrating Cavity Absorption Meter ICAM provides an instrument capable of measuring optical absorption independent of scattering effects. The measurement of optical absorption has always been complicated by scattering effects. The most common and perhaps simplest method of measuring absorption is based on transmission of light through the sample. Scatterers produce systematic errors which prevent simple transmission type absorption measurements. The ICAM is, in principal, rigorously independent of scattering effects. In this thesis the theory of the device is reviewed, and five developmental models of the device are described. Measurement results are presented for absorption results in the presence of varying concentrations of scatterers absorption spectra of various pure water samples compared to accepted values and absorption spectra for various phytoplankton cultures. Absorption values as low as .001meters have been measured. Keywords Optical absorption Isotropic illumination Light scattering. Theses.
- Optical Detection and Detectors