Special Functions (Strobe Mode, Trigger Mode, Flash Mode) - SCHOTT VisiLED MC 1500 Manual

The special functions detailed below are primarily significant for the appli-
cation of the VisiLED system in the field of industrial image processing or
"Machine Vision".
Strobe mode serves to produce "frozen images" of cyclically moving
specimens, e.g. rotating fans or balance-wheels of a clock.
By pressing the function key (9) the selected illumination unit (A or B) is put into
strobe mode: the light of this LED unit pulsates. Repeated pressing of key (9)
deactivates the strobe mode of the unit again.
The strobe mode makes it possible to "freeze" the movement of cyclically
moving specimens – but only if the strobe frequency is synchronized exactly
with the oscillation or rotation frequency of the moving specimen:
• Pressing the up/down keys (5) when the strobe mode is activated sets the
strobe frequency: the "up" key increases the frequency, "down" decreases it.
• The strobe frequency can be set roughly by holding down (5) for more than
2 seconds.
• The frequency can be fine-tuned by quickly pressing (5).
In addition the pulse duration of the individual strobe pulse can be changed.
The shorter the duration of the individual pulse, the sharper the "frozen"
image will be. The brightness of the strobe light is, however, reduced when
the pulse duration is decreased. For this reason the pulse duration should be
optimized for each moving specimen.
• Pressing down key (10) together with the up/down key (5) when the strobe
mode is activated sets the strobe pulse duration. The key combination (10) +
(5 "up") increases the pulse duration, (10) + (5 "down") decreases it.
• The strobe pulse duration can be set roughly by holding down the key
combination (10) + (5) for more than two seconds.
• The pulse duration can be fine-tuned by holding down key (10) and
pressing (5) quickly.
• When strobe frequency or strobe pulse duration are changed, this automatically
affects both VisiLED units (A and B). This guarantees the synchronized strobing
of both illuminations – a fundamental "must" for generating frozen images
when strobing with mixed light.
• The intensity of the strobe pulses cannot be changed by the MC 1500. When
the strobe is active it is automatically set at maximum brightness for this mode.
However, when the computer is controlling the MC 1500 the strobe intensity for
both units (A/B) can be individually adjusted.
8.6 Special functions
(strobe mode, trigger
mode, flash mode)
Strobe mode
Please note
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