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The Piranha XL Camera
Relevant Features: Direction Source, Internal Direction
The Piranha XL camera can accommodate a forward and reverse scan direction. The sensor timing
must follow the image as it moves over its imaging area. If the direction is wrong then the image
will look out of focus, as can be seen in the following figure.
Image scanned in direction where the TDI rows track the object motion
Figure 5. Image with proper scan direction
Image scanned in direction where the TDI rows track opposite to the object motion
Figure 6. Image with incorrect scan direction
Some AOI systems require the scan direction to change at regular intervals, such as those scanning
a panel forwards, coming to a stop, and then scanning backward as the cameras field of view is
