Motorola DS3478 - Manual (Page 39)

Digital Scanning 2 - 9
DS3478-SF Near Focus - 2D Codes
Figure 2-7 Symbol DS3478-SF Near Focus Decode Zone - 2D Codes
In.
cm
0
10 mil QR Code
Depth of Field
4.83
1.0 2.0 3.0 4.0
0 2.5 5.1 7.6 10.2
5 mil QR Code
4.25
5 mil Data Matrix
3.00
1.79 3.58
7.5 mil QR Code
0
cm
W
i
d
t
h
o
f
F
i
e
l
d
0
0.75 1.9
1.5 3.8
3.8
* Minimum distance determined by symbol length and scan angle.
0.75
1.5
1.9
in.
Note: Typical performance at 73°F (23°C)
on high quality symbols in normal room light.
Vcc = 3.3V
10 mil Data Matrix
1.25 5.00
7.5 mil Data Matrix
1.58 4.54
Top of
scanner
5.0
12.7
2.07
1.71
1.21