Optical scattering probe

From Glossary of Meteorology

optical scattering probe

A type of optical particle probe that measures the forward scattering caused by each particle or ensemble of particles intercepting a laser beam.

The scattering is converted to an equivalent size via calibration and scattering theory for spheres. Examples are the passive cavity aerosol spectrometer probe, normally for sizing 0.1–3.0-μm diameter aerosols, the forward scattering spectrometer probe, normally for sizing either 0.3– 20-μm or 0.5–47-μm aerosols and cloud droplets, and the optical cloud drop spectrometer, normally for sizing 2–200-μm cloud droplets.