Patent ID: 6359679
Filing Date: 2002-03-19
Classification: G03B,G03F

Abstract:
A positioning device comprising:a stage base having a reference surface; an anti-vibration mechanism, which supports said stage base and a structure integral with said stage base; a stage which is movable along said reference surface; and an inertia imparting mechanism including a mass body which is movable, within a predetermined stroke range, with respect to said stage base, and a mass body driving mechanism for driving said mass body, wherein said inertia imparting mechanism includes a reaction force compensation control system, which outputs to said mass body driving mechanism signals for driving said mass body to reduce reaction force produced by motion of said stage, and a position compensation control system, which outputs to said mass body driving mechanism signals for driving said mass body to compensate for positioning thereof so that said mass body exists within the predetermined stroke range.