Sharp EL-6490 Uživatelský manuál stáhnout pdf (Strana 10)

It is important to use the optimum probe current for each application such as surface obser-

vation or elemental analysis. The probe current is adjusted with the condenser lens. This

adjustment would be easier if the change of observation area or focus during condenser lens

adjustment is smaller. JEOL’s unique zoom condenser lens closely maintains focus without

image shift thus avoiding tedious readjustment.

110



Small Probe Current

Medium Probe Current

Large Probe Current

110



10



10



10



10



Zoom condenser lens closely maintains focus.

A conventional non-zoom condenser lens causes large change of focus during adjustment of probe current.

10m

m

0.5

m

0.1

m

1mm

100

m

5m

10m

m

0.5

m

0.1

m

1mm

100

m

5m

Zoom Condenser Lens Maintains Focus

Electron

gun

Zoom

condenser

lens

Super

conical

objective

lens

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 19 20

Scanning Electron Microscopes 1
Large Specimen Handled Easily 2
Ease of Operation Based 3
Observation Started Quickly 4
Electron Detector 6
Information from a Specimen 6
Multi Live Image Display 7
Fully Automated Electron Gun 8
6 Gun (Optional) 9
Small Probe Current 10
Medium Probe Current 10
Large Probe Current 10
Report Creation 11
Eucentric Specimen Stage 12
The Low Vacuum SEM 14
Freeze Dry in the LV SEM 15
(optional) 16
(EBSD : optional) 16
MINI CUP detector 17
(Optional) 18
Principal Specifications 19
Principal Options 19

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Sharp EL-6490 Uživatelský manuál Strana 10

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