Patent ID: 8508854

Claim:
A projection objective, comprising: an optical element including electrical conductor tracks at a region of the optical element, wherein: during use of the projection objective, the optical element is in a path of optical radiation so that the optical radiation is incident on the optical element; the optical element is situated in the projection objective; the optical element can ensure a spatially resolved correction of a wavefront of 10% to 15% of a pupil diameter of the projection objective; and the projection objective is a microlithography projection objective, and wherein: the projection objective comprises a field diaphragm downstream of the optical element, the field diaphragm having the form of an image of the object field in an intermediate image plane; and/or the projection objective comprises a field diaphragm and an aperture diaphragm; and/or the projection objective comprises a diaphragm downstream of a last optically active area.