Patent ID: 6857195
Filing Date: 2005-02-22
Classification: G01B,H01L

Abstract:
1. An apparatus for the measurement or machining of an object ( 37 ), which apparatus is provided with a displacement stage ( 48 ) for the displacement in at least one co-ordinate direction of a part of the apparatus ( 32 , 34 ) which is to be displaced relative to a frame ( 2 ) of the apparatus, which displacement stage includes: two supporting wedge-shaped displacement guides ( a displacement member ( which apparatus is also provided with drive means for the displacement of the two displacement guides in such a manner that the distance between their wedge faces varies while the orientation of the wedge faces relative to one another remains the same, characterized in that the apparatus is provided with control means for controlling the drive means, and that the drive means and the control means are arranged for mutually independent displacement of the two displacement guides.