42
Preparing to Scan
3.2
Preparations
Targets
•
Checkerboard pattern
•
Use non-reflective targets
•
Use non-reflective target mounting and devices (such as adhesive strips or
holders)
•
Good recognizable labeling
•
Distribute the targets over the scanning area at different elevations
•
Have at least three targets per scan
•
For best results use the 6" Leica grey and white tilt-and-turn targets.
Position the
HDS6000
•
Position the HDS6000 in the center of the target field.
•
The "angle of incidence" is smaller the more perpendicular the surface is to you,
so the angle of incidence should be smaller than 45 degrees (see following illus-
tration).
•
The recommended distance of the targets to the scanner depends on the scan
resolution.
•
Ensure that the HDS6000 is within the recommended distance of 5 to 17 meters
/ 16.4 to 55.8 ft to the targets.
