Digital Scanning 2 - 11

DS3478-SF Smart Focus

Figure 2-9

Symbol DS3478-SF Smart Focus Decode Zo ne

In.
cm
0
20 mil
Depth of Field
20.0
510 15 20
012.7 25.4 38.1 50.8
13 mil (100% UPC)
12.3
5 mil
0.8
14.5
2.0 6.0
15 mil PDF417
0
cm
W
i
d
t
h
o
f
F
i
e
l
d
0
2.75 7.0
5.5 14.0
14.0
*
*
* Minimum distance determined by symbol length and scan angle.
5.5
7.0
in.
Note: Typical performance at 73°F (23°C)
on high quality symbols in normal room light.
Vcc = 3.3V
7.5 mil
1.3
8.5
10 mil PDF417
1.8
8.8
2.75
6.67 mil PDF417
2.3 4.5
Top of
scanner