4
Z
‐
5132
Image
Scan
Module
I
NSTALLATION
G
UIDE
Installation
Mounting
In
this
section,
we
will
introduce
how
to
mount
the
scan
engine
into
your
design.
At
the
back
of
scan
engine,
there
are
two
screw
holes
reserved
for
mounting,
the
scan
engine
can
be
fixed
in
any
position
and
any
angle
without
any
degradation
in
performance.
And
to
ensure
the
scanner
reaches
its
best
performance,
the
following
points
need
to
be
noticed
when
mounting
the
scanner:
To
avoid
direct
sunlight
or
any
other
bright
light
source
illuminating.
When
placing
the
barcode
label,
one
must
be
careful
not
to
over
tilt,
skew
and/or
pitch
the
barcode.
To
avoid
putting
the
scanner
in
specula
reflection
position,
the
CMOS
sensor
will
not
sense
the
reading
of
any
barcodes
if
the
LED
light
reflects
straight
back.
The
barcode
must
be
placed
within
the
effective
depth
of
field
(D.O.F.)
area,
the
effective
reading
distance
for
the
barcode
from
the
scanner.
Its
theory
is
like
a
camera,
if
the
object
is
placed
within
the
focal
range,
and
the
image
appears
clearly.
But
if
the
object
is
outside
the
focal
range,
the
image
then
is
blurred.
And
different
quality
and
density
of
barcodes
could
affect
its
D.O.F.;
usually
a
lower
piece
or
high
density
of
barcode,
its
depth
of
field
is
shorter.
It
is
suggested
to
avoid
using
depth
of
field
extremes
range,
barcode
is
easily
moved
away
from
the
reading
range.
