A phase-shifting projection moire´ method particularly intended
for high-speed three-dimensional inspection of fine objects is presented.
Emphasis is on realization of phase-shifting fringe analysis in
projection moire´ topography using a set of line grating pairs designed to
provide different phase shifts in sequence. Further, a time-integral fringe
capturing scheme is devised to remove undesirable high-frequency original
grating patterns in real time without time-consuming software image
processing. Finally, the performances of the proposed method are discussed
with measurement results.