Abstract

A widely used nondestructive technique for monitoring ambient levels of carbon in the atmosphere is the integrating plate method (IPM)⁽¹⁾ which takes advantage of the unique optical properties of elemental carbon (soot) by measuring the ambient by which a beam of light is attenuated when passing through a field loaded filter. Another absorptive technique is photoacoustic detection (PAD), a process which may be potentially more accurate than IPM for ambient measurements.

© 1981 Optical Society of America