Patent ID: 6472840
Filing Date: 2002-10-29
Classification: F16F,G03F

Abstract:
A vibration cancellation apparatus comprising:a base member; a movable element which is set up upon said base member, and is movable upon said base member; a vibration proof unit that supports said base member above a foundation; a reaction transmission member which discharges reaction generated when said movable element moves upon said base member by transmitting the reaction to the foundation, the reaction transmission member being isolated from said base member by said vibration proof unit; a vibration detection device which detects vibration generated in said reaction transmission member; a weight which is movable in a direction to reduce the vibration, and which is provided to said reaction transmission member; and a vibration cancellation drive device which drives said weight so as to reduce the vibration based upon the vibration detected by said vibration detection device.