Three projectors are used to create a
thin sheet of light below the sample material. Drops are produced using
a drop generator and the sample is observed using a high-speed camera
placed close to the generator. The splash droplets produce bright spots
in the camera image when they pass through the sheet of light. The
location and time at which each droplet passes the light sheet
determines its velocity and orientation.
Captured frames of a splash event
(b) Droplet coordinates
(a) Three frames (time instances) of a
measured splash. The bright spots correspond to intersections of
droplets with the light sheet. (b) ρ is the radial distance of the
droplet from the point of impact and φ is its azimuthal angle
measured from the x-axis.