The invention discloses a three-dimensional collection device and a three-dimensional scanning
system. Speckles projected by the three-dimensional collection device are nontoxic and
pollution free, and speckle patches used enable speckle patterns to be drawn delicately so as to improve scanning data collection accuracy. A single
control unit is adopted to control and trigger a speckle
projector to project speckles and control corresponding speckle collection and colorful image collection, which make image
collection time short and make speed fast and can effectively avoid a
displacement error of a scanned object. The three-dimensional
system applies the three-dimensional collection device having all the mentioned features and provides a three-dimension optical non-contact three-dimensional scanning mode, which produces less damage on a
living body, and has
fast scanning speed and high accuracy.