Patent ID: 8352086

Claim:
Active vibration isolation system ( 1 ) for vibration-isolated support of lithographic devices, wafer handling systems, and/or microscopes, comprising: a plurality of vibration transducers ( 4 a , 4 b ) for supplying sensor signals which are representative of vibrations; a plurality of actuators ( 5 ) for vibration compensation which may be controlled by supplying actuator control signals; and a control device ( 10 , 10 a , 10 b ) for processing the supplied sensor signals to form the actuator control signals, the control device having an input side and an output side, wherein the vibration transducers ( 4 a , 4 b ) have at least one first acceleration sensor ( 4 a ) for detecting vibrations in a first frequency range and at least one second acceleration sensor ( 4 b ), which is different from the first acceleration sensor, for detecting vibrations in a second frequency range which extends the first frequency range.