Patent ID: 6857195

Claim:
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 ( 24 , 26 ) which bear on a supporting surface ( 20 ) of the apparatus and each of which is provided with a wedge face ( 28 , 30 ), said guides being arranged opposite one another in such a manner that their wedge faces face one another, a displacement member ( 32 ) which is connected to the part of the apparatus to be displaced and is provided with two wedge faces ( 34 , 36 ) which co-operate with the wedge faces ( 28 , 30 ) of the displacement guides, the displacement member being supported by the wedge faces of the displacement guides as a result of said co-operation, 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.