![background image](http://html.mh-extra.com/html/sick/ranger3/ranger3_operation-instructions-manual_1263837028.webp)
In the figure below, the laser is turned on slightly before the sensor exposure time
starts. The reason for this is to allow turn-on time. When the exposure is finished, the
laser is turned off.
The
LineStart
trigger signal from the encoder is used as a reference. The
TimerDelay
para‐
meter sets the delay time (t1-t0) from the
LineStart
signal (t0) until the laser is turned
on. The
TimerDuration
parameter defines for how long the laser is on. When
TriggerSelector
is set to
ExposureStart
, the
TriggerDelay
parameter sets the delay time (t2-t0) from the
LineStart
signal until the exposure starts.
The maximum time (in seconds) between two
LineStart
signals is 1/(maximum
Acquisi‐
tionLineRate
). The higher the line rate, the shorter the cycle time.
TimerDuration
LineStart
LaserStrobeOut
SensorTrigger
t2
ExposureTime
t1
t0
Figure 10: Laser is on only during exposure
7.7
3D profiling
7.7.1
Laser impact position on the sensor
The basic function of the 3D measurements is to compute the impact position of the
laser line for all columns of the selected region of interest (ROI). The light intensity dis‐
tribution from the laser line along a sensor column across the laser line can be
described as in the figure below.
Intensity
1
ROI start
4
ROI end
3
Sensor row
2
Figure 11: The impact position of the laser in one column
1
Intensity
2
Sensor row
3
ROI end
7
CONFIGURATION
28
O P E R A T I N G I N S T R U C T I O N S | Ranger3
8020774/14IM/2019-07 | SICK
Subject to change without notice