This document discusses Tayhwa Tech Co., Ltd and their products for precise positioning including piezo actuators, sensors, stages, drive and control systems. It summarizes key characteristics of piezo actuators like hysteresis, creep, generated force and displacement reduction. It also describes different sensor types, stage structures using hinge mechanisms and FEM analysis, as well as drive and control block diagrams. The document provides details on various precise stage and objective lens positioner products and their specifications.