Decode Zones; Near Focus - Symbol DS 3408 Product Reference Manual

Decode Zones

Near Focus

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Note: Typical performance at 73˚F (23˚C)
on high quality symbols in normal room light.
Vcc = 3.3V
5 mil
2.0
6.67 mil PDF417
2.3
7.5 mil
1.3
10 mil PDF417
1.8
13 mil (100% UPC)
0.8
15 mil PDF417
*
*
0 2 4
In.
cm
0 10.2
5.1
Depth of Field
* Minimum distance determined by symbol length and scan angle.
Figure 2-7. DS 3408 Near Focus Decode Zone
5.5
6.0
20 mil
6 8
20.3
15.2
cm
in.
3.5 8.9
W
i
d
t
1.75 4.4
h
o
0 0
f
F
i
1.75 4.4
e
l
d
3.5 8.9
9.5
10
25.4
Scanning 2-9