8-4 Imaging Subsystem
Image Generation Process 5DX Series 3
A graphical representation of Image Generation is shown in Figure 8-1. Based on
the panel program, the System Controller determines which Field of View needs to
be loaded into the X-ray Scan Controller. The System Controller sends a signal to
the Interface Card which then sets the appropriate bank select for the X-ray Scan
Controller. The System Controller also provides the Motion Drivers with the
coordinates for moving the XYZ Stage Assembly to the next image.
The X-ray High Voltage Power Supply provides -160 kilovolts dc to the Cathode
of the X-ray Tube. This voltage provides the acceleration for the Electron Beam to
produce X-rays. The X-ray Tube Electronics control the emission of the electrons
to be accelerated to produce X-rays. The Focus Coil concentrates the Electron
Beam. The X-ray Scan Deflection Coils magnetically steer the Electron Beam
based on the FOV loaded into the X-ray Scan Controller. The accelerated electrons
in the Electron Beam hit the X-ray Target and generates X-rays.
When an image is being generated within the Agilent 5DX, X-ray Laminography
is the process being used. X-ray Laminography is a process that allows the areas
that are not in the Plane of Focus to be averaged out. This is represented in Figure
8-2 and accomplished by having the Rotary Scintillator and the Electron Beam
180º out-of-phase from each other. At a given Plane of Focus, there will be a slice
of an image that is in focus, this is referred to as the slice image. Everything that is
above or below the Plane of Focus is averaged out because of its movement
relative to the Plane of Focus.
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