Planar laser-induced fluorescence

Planar laser-induced fluorescence (PLIF) is an optical diagnostic technique widely used for flow visualization and quantitative measurements.

A PLIF setup consists of a source of light (usually a laser), an arrangement of lenses to form a sheet, fluorescent medium, collection optics and a detector.

The light from the laser (usually a beam) is passed through a set of lenses and/or mirrors to form a sheet, which is then used to illuminate the medium.

Timing electronics are often used to synchronize pulsed light sources with intensified cameras.

This allows for the simultaneous measurement of a fluid velocity field and species concentration.