  Active stereovision systems for the 3D measurement of surfaces rely on the
sequential projection of different fringe patterns onto the scene to robustly
and accurately generate 3D surface data. This limits the temporal resolution to
the time by which a sufficiently high number of patterns can be projected and
recorded. By encoding patterns spectrally and recording them with a
hyperspectral imager, it is possible to record several patterns in a single
image, limiting the temporal resolution to only the duration of the
illumination. A picosecond 3D surface measurement was demonstrated using a high
pulse energy femtosecond Ti:Sa laser, spectrally broadened in a hollow core
fiber, and two hyperspectral cameras recording the patterns generated by
diffraction at an Echelle grating.
