AN ADVANCED OPEN-PATH ATMOSPHERIC MONITOR DESIGN

摘要

The conceptual design of an open-path atmospheric monitor combines an acousto-optic tunable filter for emission spectroscopy (3-14 urn) with a mid-IR (4.6-5.4 urn) and far-IR laser (9.2-10.9 um) for absorption spectroscopy. It utilizes mostly commercially available components, covers a large area (-4 km radius), measures the distance to any reflecting object, can take measurements along any line-of-sight, and is eye safe. Of twenty test pollutants it is to detect, the concentrations of all twenty will be measurable via emission spectroscopy and ten by the more sensitive absorption spectroscopy.