5.4.2
Reading distance to the bar code and aperture angle α
105°
Line scanner
Line scanner with oscillating mirror
Reading distance a
Reading distance a
The maximum distance from the reading window of the device to the bar code may not
exceed the design values for the device. Because of the V-shaped deflection of the
beams, the usable length of the scan line for evaluation (reading field height) depends
on the reading distance.
In the specification diagrams, the height of the reading field dependent on the reading
distance is shown for differing resolutions (module widths),
.
5.4.3
Angle alignment of the device
The optimum alignment of the device is achieved when the scan line crosses the
stripes of the bar code as close to a right angle as possible (tilt and inclination). Possi‐
ble reading angles that can arise between scan line and bar code at all three levels in
the area must be taken into account.
In order to prevent surface reflections, the angle of rotation must be approx. 15° out of
plumb to the bar code,
see "Avoidance of surface reflections", page 25
β
α
γ
1
2
Figure 14: Line scanner: Read angle occurring between scanning line and bar code
1
Depth of field
2
Reading distance
5
MOUNTING
24
O P E R A T I N G I N S T R U C T I O N S | CLV69x
8014396/ZMG8/2017-07-04 | SICK
Subject to change without notice
