Patent ID: 8760777

Claim:
An apparatus having an optical axis, the apparatus comprising: an optical element; an external holder; and a first adjustment device connecting the optical element and the external holder, the first adjustment device having at least a first translational degree of freedom and first and second rotational degrees of freedom, the first adjustment device comprising: a foot part on the external holder; a head part; and a center part connected to the optical element via the head part, wherein: the first adjustment device has a local coordinate system with a first local axis located on a connection line between the center part and the foot part; the first local axis of the first adjustment device is parallel or inclined with respect to the optical axis of the apparatus; a second local axis of the local coordinate system of the first adjustment device is perpendicular to the first local axis of the local coordinate system of the first adjustment device; the second local axis of the local coordinate system of the first adjustment device is perpendicular optical axis of the apparatus even if the first local axis of the local coordinate system of the first adjustment device is inclined with respect to the optical axis of the apparatus; the first translational degree of freedom is along a third axis of the local coordinate system of the first adjustment device, or the first translational degree of freedom is along an axis parallel to the third axis of the local coordinate system of the first adjustment device; the third axis of the coordinate system of the first adjustment device is perpendicular to the first and second axes of the coordinate system of the first adjustment device; the first and second rotational degrees of freedoms are rotations about the second and third axes of the local coordinate system of the first adjustment device, or the first and second rotational degrees of freedoms are rotations about axes parallel to second and third axes of the local coordinate system of the first adjustment device; and the apparatus is a microlithographic apparatus.