4 DESCRIPTION OF CONTROLS
EM210F-1
4-1
4.1 COLUMN
(See Fig. 3.2)
4.1.1 Condenser Aperture Assembly
l
Condenser aperture assembly (
F
Fig. 4.1)
Knob 1:
The apertures are selected corresponding to the knob 1
position.
Knob 1 position
Aperture size
Open
Knobs 2 and 3:
Knobs 2 and 3 are used to move the apertures in X and Y
directions.
Knob 1
Knob 3
Knob 2
Fig. 4.1 Condenser lens aperture assembly
4.1.2 Condenser Mini Lens Shift Screws
Used for illumination system alignment.
4.1.3 Specimen
Holder
Used to brings a specimen into/from the electron beam path.
4.1.4 Goniometer
A specimen loaded in a specimen holder is inserted in the goniometer and tilted
with a motor built in the goniometer.