An optical anti-shake system with a tremor sensing module and compact linear piezomotors

Abstract

In this study, a new piezomotor is presented, and an optical anti-shake image system using this piezomotor is also developed. Comparing with other linear piezomotors, this motor is simpler, compacter, and more powerful. The dimension of the motor is 16mm(L)×8mm(W)×1.5mm(H), and the resonate frequency is 220kHz. Moreover, the push force at operating voltage 10Vpp is 15g, and the power consumption is 0.23W. Because of the long travel range:±2mm and high maximum velocity:26mm/s, it could satisfy the compensative displacement of the CMOS sensor caused by the hand tremor in a anti-shake image system. In this paper, a dynamic behavior of the piezomotor is investigated by COMSOL software, and the control algorithm in the optical anti-shake image system, including tremor sensing, motor position sensing, is also described.