Patent ID: 8921804

Claim:
A condenser lens arrangement for an electron beam being generated from an electron beam emitter in an electron beam system, comprising: a magnetic condenser lens adapted for generating a magnetic condenser lens field, the condenser lens having a symmetry axis; and a magnetic deflector adapted for generating a magnetic deflector field; wherein the deflector is configured so that the superposition of the magnetic condenser lens field and the magnetic deflector field results in an optical axis of the condenser lens arrangement being movable relative to the symmetry axis of the condenser lens; wherein the deflector is configured to compensate for a displacement of the emitter in an x-direction and/or in a y-direction; wherein the distance between the emitter and the condenser lens arrangement is between about 0 mm and about 25 mm; and wherein the deflector of the condenser lens arrangement is the only deflector between the emitter and the condenser lens arrangement.