Patent ID: 8162831

Claim:
A hand scanner, comprising: an ultrasonic energy transducer; a movable arcuate platen configured to accommodate a hand on the platen, the platen configured to move about an axis of rotation and about the energy transducer, and configured to accommodate moving the hand about the axis of rotation; and, a support platform having rollers in contact with the platen, a first of the rollers being positioned near an end of the platform and a second of the rollers being positioned near another end of the platform, and thereby configured to maintain a distance between the transducer and the platen as the platen moves relative to the support platform; wherein the energy transducer is configured to move relative to the support platform and the platen, and in a direction that is substantially parallel to the axis of rotation, and wherein the energy transducer is configured to send energy to the hand, and receive energy from the hand.