Datalogic 937800000, Product Reference Manual

Page: 91 / 188

PRODUCT REFERENCE GUIDE 77
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
d
0
View Angle
Horizontal View Angle
Vertical View Angle
Diagonal
Min Reading
Distance
mm
Matrix 120
210-xxx
(WVGA)
8 mm 39° 26° 46° 25
Matrix 120
310-XXX
(MP)
8 mm 41° 32° 49° 30
Matrix 120
311-xxx
(MP+WA)
8 mm 52° 40° 63° 30
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