Patent ID: 7928403

Claim:
A charged particle beam device, comprising: a multiple lens assembly, comprising at least two physically round lens sub-units, each lens sub-unit defining a round lens field, each lens sub-unit having an optical axis defined by individual lens sub-unit openings, wherein at least two of the optical axes of the lens sub-units are inclined to each other such that a charged particle beam passing through one of the at least two lens sub-units strikes a specimen at a first angle to the specimen plane, and a charged particle beam passing through another one of the at least two lens sub-units strikes the specimen at a second angle to the specimen plane, the second angle being different from the first angle, wherein the at least two lens sub-units are laterally spaced apart; and a deflection system which comprises at least one deflection unit suitable for deflecting a charged particle beam such that it propagates substantially along the optical axis of one of the lens sub-units; wherein the multiple lens assembly is a one-piece assembly that is positioned downstream of the deflection system.