Abstract

An optoacoustic detector or spectrophone has been used to perform detailed measurements of the absorptivity of mixtures of water vapor in air. A C12O216 laser was used as the source, and measurements were made. at forty-nine different wavelengths from 9.2 μm to 10.7 μm. The details of the optoacoustic detector and its calibration are presented, along with a discussion of its performance characteristics. The results of the measurements of water vapor absorption show that the continuum absorption in the wavelength range covered is 5–10% lower than previous measurements.

© 1976 Optical Society of America

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