Patent ID: 9171695
Filing Date: 2015-10-27
Classification: G02B,G05B,G05D,H01J

Abstract:
1. A stage apparatus including a stage mechanism that moves a sample mounted on the stage mechanism, a drive unit that drives the stage mechanism, a stage operation input unit that inputs an operational command for the stage mechanism, and a stage control unit that controls the stage mechanism in accordance with an input from the stage operation input unit, the stage apparatus comprising: a waveform generation unit that generates a voltage signal to be outputted to the drive unit from a command value that is inputted by the stage operation input unit and drive waveform data that shows a command voltage value at each predetermined time; an amplification unit that amplifies the generated voltage signal to be outputted to the drive unit; and a storage unit that stores standard waveform data showing a command voltage value at each predetermined time, and correction data correcting the standard waveform data so as to move the drive unit at constant speed, wherein the correction data corrects a command voltage value of the standard waveform data or an output timing of a command voltage value such that a difference between a first time history response and a second time history response is reduced to zero, the first time history response for displacement or speed when the stage mechanism is driven with use of the standard waveform data and the second time history response for displacement or speed when a speed of the stage mechanism is constant, and the standard waveform data is corrected by the correction data to be set as the drive waveform data.