beautypg.com

Ds3478-sf near focus - 2d codes, Ds3478-sf near focus - 2d codes -9, Digital scanning 2 - 9 – Motorola DS3478 User Manual

Page 39

background image

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