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GX53
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3-13 Observing the image using the mercury burner
Slide the BF/DF selection lever to set to the BF side.
Bring the sample into focus.
Adjust the collector lens focusing knob a to make the entire field of
view brightest evenly. If the brightness is uneven, perform the centering
according to “Centering the mercury burner" on page 52
If the collector lens focusing knob is positioned far from you
and it is difficult to use it, insert the extension handle U-CLA
into the knob.
1
2
3
TIP
If the observation light is too bright, insert the ND filter in the filter slider
insertion slots (2 positions) a to reduce the light.
For details, see “3-12 Using the filter sliders" on page 28.
If the mercury burner is kept turned ON for long hours with
the filters inserted, the filter and its metal frame will be
heated. Be careful not to burn yourself.
Do not leave the filter for a long time at locations other
than the click position.
CAUTION
Set the main switch a to (ON). For details, refer to the instruction
manual provided with the unit.
1
1
Turning ON the power supply for mercury burner
2
Adjusting the brightness
3
Inserting the ND filter
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