Patent ID: 8129693

Claim:
A system, comprising: an objective lens configured to focus a charged particle beam in an object plane; a first condenser lens disposed in a beam path of the charged particle beam upstream of the objective lens; a deflector disposed in the beam path between the first condenser lens and the objective lens, the deflector configured to change an angle of incidence of the charged particle beam in an object plane; a second condenser lens disposed in the beam path between the deflector and the objective lens; and an aberration corrector disposed in the beam path between the deflector and the objective lens, the aberration corrector configured to compensate aberrations introduced by the objective lens, wherein: the aberration corrector is configured to not compensate aberrations introduced by the first condenser lens; the aberration corrector is configured to correct aberrations introduced by the second condenser lens; and the system is a charged particle beam system.