β
α
γ
1
2
Figure 13: Line scanner: Occurring reading angle between scan line and bar code
1
Depth of field
2
Reading distance
Table 7: Permitted read angle between scan line and bar code
Angle
Limit Value
Tilt α
Max. 30°
Pitch β
Max. 45°
Skew γ
Max. 45°
NOTE
The specified maximum values can only be achieved if conditions are optimal. The
actual maximum depends on module width, code type, print contrast, ambient light,
distance and scanning frequency.
5.3.4
Avoiding surface reflections
If the light of the scan line(s) hits the surface of the bar code exactly perpendicular,
disturbing reflections may occur.
To avoid this effect when receiving the backscattered light, mount the device so that the
outgoing light is tilted relative to the perpendicular.
Line scanner
(viewing window on front)
Line scanner
(viewing window on side)
(Top view)
(Top view)
105°
105°
1
2
3
3
Figure 14: Avoiding surface reflections on the example line scanner: Angle between light emitted
and bar code (tilting away from vertical)
1
Line scanner (front viewing window)
2
Line scanner (side viewing window)
3
Supervision
NOTE
When the scan line is tilted approx. 15° from the perpendicular, optimum results are
obtained.
5
MOUNTING
34
O P E R A T I N G I N S T R U C T I O N S | CLV61x DualPort (PROFINET)
8017842/19XD/2021-11-19 | SICK
Subject to change without notice
