106
MATRIX 220
CHAPTER 6
READING FEATURES
FOV CALCULATION
Use the data in the following table to calculate the FOV for your application, referring to
Figure 86 and the formula below.
Focal
Length
F/#
d
0
View Angle
Horizontal
View Angle
Vertical
View Angle
Diagonal
Min Reading
Distance
mm
7 mm F/4 11 mm 38° 29° 48° 40 mm
12 mm F/5 4 mm 24° 18° 30° 40 mm
The viewing angle has a tolerance of ± 1° depending on the reading distance.
FOVx = 2 [ (d + d0)
*
tan (ax/2) ]
where:
FOV
x
= horizontal, vertical or diagonal FOV
α
x
= horizontal, vertical or diagonal viewing angles.
d = reading distance (in mm) from window surface to code surface
d
0
= offset (in mm) from center of lens to external window surface
Figure 86 - Reading Distance References
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