FEI Quanta FEG 250, Руководство пользователя, Страница: 13 / 228

System Overview: How Quanta FEG SEM Works
2-3
IMAGE VIEWING AND CAPTURE
Because the amplified detector signal is displayed synchronously with
the beam scanning, there is a correspondence between the
brightness of an image point on the monitor screen and the signal
detected at corresponding point on the specimen.
Magnification is the ratio of the size of the viewing monitor screen to
the size of the area scanned on the specimen. Increased
magnification is achieved by reducing the size of the area scanned on
the specimen.
POSITIONING OF THE STAGE
A choice of computer-controlled high-accuracy multi-axis stages
offers precision specimen manipulation and automation for overall
spatial orientation on highly repetitive or extremely irregular samples.
FIGURE 2-2 QUANTA FEG 250