Patent ID: 6995378

Claim:
A lens arrangement having a laterally displaceable optical axis for particle beams for transmitting regions of an object plane into an image plane via electrons, comprising: a combined lens operable as an immersion lens and including a cylinder lens and a quadrupole lens having a first slit diaphragm and a second slit diaphragm capable of being acted upon by electrical or magnetic fields, said quadrupole lens having an optical axis extending in a center plane of said cylinder lens and defining an optical axis of an image with positioning of said optical axis of said quadrupole lens being variable in a direction of a slit-shaped aperture of said cylinder lens and with focusing of said quadrupole lens taking place in a section of said cylinder lens not focused and defocusing of said quadrupole lens taking place in a section of said cylinder lens that is focused, said combined lens comprising an immersion field in an axial direction and including at least a first successive field and a second successive field, said first successive field lying between an object and said first slit diaphragm and said second successive field lying between said first slit diaphragm and said second slit diaphragm, or lying between a downstream diaphragm pair; and, means for adjusting said first successive field and said second successive field independently of one another with a focusing/defocusing effect of said combined lens resulting from a superimposition of said immersion field.