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A simple device with 1.order-effects is a thin lens defined by the command:
4 M(AGNETIC) T(HINLENS)
<refractive power f-1x in meter-1>
<refractive power f-1y in meter-1> ;
[example: M T 1.0 1.0 ;]
or by
4 E(LECTRIC) T(HINLENS)
<refractive power f-1x in meter-1>
<refractive power f-1y in meter-1> ;
[example: E T 1.0 1.0 ;]
KPII
1999-10-20