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READING FEATURES
7 READING FEATURES
7.1 OPTICAL ACCESSORY SELECTION
Referring to Figure 98, and the formula below, use the data in the following table to calculate
the FOV for your application.
Model
LNS-1216 16 mm
LNS-1225 25 mm
Matrix 450 800-030
LNS-1235 35 mm
LNS-1250 50 mm
The viewing angle has a tolerance of 1° depending on the focus distance.
where:
FOV
= horizontal, vertical or diagonal FOV
x
= horizontal, vertical or diagonal viewing angles.
x
d
= focus distance (from Lens Cover window surface to code surface)
Example:
The FOV for a Matrix 450 800-030 base using the 16 mm lens at a focus distance of 1000
mm is:
FOV
FOV
2
The minimum focus distance is used for applications that do not use the LT-03x lighting system.
Viewing Angle
Lens
Horizontal
28.8°
19.8°
13.4°
9.2°
FOV
= 2 (d + 44 mm) tan (
x
44 mm
Figure 98 – Reading Distance References
= 2 [(1000 mm + 44 mm) tan (28.8°/2)] = 536 mm
H
= 2 [(1000 mm + 44 mm) tan (24.5°/2)] = 453 mm
V
Viewing Angle
Viewing Angle
Vertical
Diagonal
24.5°
37.2°
16.7°
25.7
11.3°
17.5°
7.8°
12.1°
/2)
x
d
7
2
Min Focus Distance
d (mm)
40
50
150
340
FOV
plane
105
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