A CIRCULAR-ARC BENDING MODEL OF PIEZOELECTRIC TUBE SCANNERS

Based on a circular are scanning model of piezoelectric tubes, the inf luence of the tip length mounted on a tube upon the transverse scannin g and the relation between the vertical and the transverse displacemen t of the tip are reported. With this simple model one can obtain three -dimensional features of a piezoelectric tube scanner by just measurin g the vertical deformation and a few geometric sizes of the tube witho ut knowing the detailed parameters of the tube. The estimated scanning by the model may be 15% larger than the actually measured one for a c ertain piezoelectric tube because of the edge effects of the tube. How ever, the model can be simply revised on the basis of experiments. (C) 1996 American Institute of Physics.