Datalogic A30, Руководство по оборудованию

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IMAGE CAPTURE FEATURES
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7
T
exp (max)
and LS
(max)
are represented in the graph below as the curved line for X (image
resolution). Values above the curve result in blurring. In practice, the application values are
somewhere below the theoretical line due to environmental and other conditions.
Line Speed
T
exp
SW Limit
T
exp (min)
SW/HW Limit
X
2X
C
onv
ey
or
S
pee
d
Li
mi
t
Readable Blurring
For example, the maximum target speed in the application is also affected by these conditions:
• Part/Background Contrast : maximum speed decreases when decreasing image contrast
(poor quality images, reflective transparent coverings, different supports and printing
techniques).
•
Part Resolution
: maximum speed increases when decreasing part resolution, (i.e.
2X)
. There
is a decrement of overlapping effects between two adjacent elements.
• Tilt Angle : maximum speed decreases when increasing Tilt angle (from 0 to 45 degrees).
T
exp (min)
is the minimum Exposure Time value obtainable for the specific application. It can be
evaluated in static inspection conditions and depends on the camera hardware selected for the
application (lighting system, optical lens, diaphragm aperture, distance) and on any external
lighting system. It may also depend on part clarity and camera position.