Preparation
PreparationPreparation
Preparation
Setup
SetupSetup
Setup
Before connecting the devices, adapt the whole scanner setup to the size of the object or surface region you
want to scan.
The intersection angle between projection and camera view should be around 15°-25° (max. 10°-35°).
The following table should give you some indications for an optimal setup:
Size of scan object /
Size of scan object /Size of scan object /
Size of scan object /
surface region
surface region surface region
surface region s
ss
s
Calibration
CalibrationCalibration
Calibration
pattern
pattern pattern
pattern
Lens distance
Lens distance Lens distance
Lens distance b
bb
b
between camera
between camerabetween camera
between camera
and projector
and projectorand projector
and projector
Distance
Distance Distance
Distance d
dd
d
between scanner
between scannerbetween scanner
between scanner
and object
and objectand object
and object
Achievable scan
Achievable scanAchievable scan
Achievable scan
resolution (approx.
resolution (approx.resolution (approx.
resolution (approx.
0.1% of object size)
0.1% of object size)0.1% of object size)
0.1% of object size)
<30 mm
<30 mm<30 mm
<30 mm 30 mm ca. 60 mm ca. 90 mm < 0.05 mm
50 mm
50 mm50 mm
50 mm 60 mm ca. 60 mm ca. 120 mm ca. 0.05 mm
70 mm
70 mm70 mm
70 mm 60 mm ca. 65 mm ca. 180 mm ca. 0.08 mm
90 mm
90 mm90 mm
90 mm 120 mm ca. 80 mm ca. 220 mm ca. 0.1 mm
120 mm
120 mm120 mm
120 mm 120 mm ca. 110 mm ca. 300 mm ca. 0.13 mm
150 mm
150 mm150 mm
150 mm 120 mm ca. 125 mm ca. 350 mm ca. 0.15 mm
200 mm
200 mm200 mm
200 mm 240 mm ca. 160 mm ca. 450 mm ca. 0.2 mm
300 mm
300 mm300 mm
300 mm 240 mm ca. 250 mm ca. 700 mm ca. 0.3 mm
500 mm
500 mm500 mm
500 mm 240 mm ca. 400 mm ca. 1200 mm ca. 0.5 mm
in general
in generalin general
in general similar to object angle 15°-25°
between them
object should fill
camera image
ca. 0.1% of object size
The camera can be mounted left or right of the projector – depending on how a suitable distance between
their lenses can be achieved. The DAVID software also supports a vertical setup, with camera and projector
above each other.
4
object size
s
s
s
s
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