Reading Features; Fov Calculation - Datalogic Matrix 120 Product Reference Manual

CHAPTER 6

READING FEATURES

FOV CALCULATION

Use the data in the following table to calculate the FOV for your application, referring to
Figure 60 and the formula below.
Model
Matrix 120
210-xxx
(WVGA)
Matrix 120
310-XXX
(MP)
Matrix 120
311-xxx
(MP+WA)
The viewing angle has a tolerance of ±1° depending on the reading distance.
where:
FOV
x
α
= horizontal, vertical or diagonal viewing angles.
x
d = reading distance (in mm) from window surface to code surface
d = offset (in mm) from center of lens to external window surface
0
View Angle
d
0
Horizontal
8 mm 39°
8 mm 41°
8 mm 52°
FOVx = 2 [ (d + d0) tan (ax/2) ]
= horizontal, vertical or diagonal FOV
View Angle View Angle
Vertical Diagonal
26° 46°
32° 49°
40° 63°
PRODUCT REFERENCE GUIDE 77
Min Reading
Distance
mm
25
30
30