Tolerancing plugin

Tolerancing plugin can be used to simulate imperfections in machining of lenses. It can calculate additional fields created by misalignment, tilt, ellipticity and triangularity of electrodes of rotationally symmetric electrostatic lenses and magnetic materials of rotationally symmetric magnetic lenses.

Publications

Influence of Saturation of Magnetic Lens Material on Fields of Deflectors and Parasitic Fields, Zlamal, J; Lencova, B, Microscopy and Microanalysis, 2015

Ofloff electrostatic lens

and multipole axial field function of focusing electrode

Spot calculated for focusing electrode misaligned by 0.1 mm

Magnetic lens

and axial field functions of left-hand toleranced polepiece

Spot calculated for left-hand polepiece misaligned by 0.1 mm