Patent ID: 8553199

Claim:
A lithographic apparatus comprising: an illumination system configured to condition a radiation beam; a patterning device support constructed to support a patterning device, the patterning device being capable of imparting the radiation beam with a pattern in its cross-section to form a patterned radiation beam; a substrate table constructed to hold a substrate; a first module configured and arranged to enable projection of the patterned radiation beam onto a target portion of the substrate; a sensor mounted to the first module arranged to, in use, detect a vibration of the first module; an actuator arranged to, in use, exert an actuator force on the first module; and a control unit configured to (a) control an actuating device of the lithographic apparatus to perform a displacement of a second module, (b) measure the vibration of the first module during the displacement of the second module using the sensor, (c) represent the measured vibration of the first module as a disturbance force acting on the first module, and (d) determine, using an established representation, the actuator force that, in use, at least partly, counteracts the disturbance force acting on the first module when applied synchronously with the displacement of the second module, wherein the actuator includes a first part directly mounted to the first module and a second part mounted to the first module via a flexible member.