Patent ID: 8582113

Claim:
A device for determining the position of a structure on an object in relation to a coordinate system, the device comprising a measuring table carrying the object, wherein the measuring table is movable in a plane, a block defining the plane, at least one laser interferometer system for determining a positional change of the measuring table in the plane, at least one optical arrangement for transmitted or reflected light illumination of the object, wherein each optical arrangement defines an illumination branch, an optical system support, an illumination apparatus for reflected or transmitted light illumination, at least one optical element, wherein at least one part of the at least one optical element extends into a space formed between the block and the optical system support, wherein the block or the optical system support spatially separates the illumination apparatus from the plane, and at least one encapsulation, wherein each encapsulation encapsulates at least one optical component of at least one optical arrangement and/or at least one optical element.