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Image Engineering
Example
Camera
exposure
time:
1/250 s
LED-Panel
settings:
CONTINUOUS, exposure time 1/10 s
Each time the LED has moved three places forwards between the consecutive images. With
LED-
Panel’s frequency set to 0.1s, the multi-shot mode has a speed of 0.3 s per picture (i.e.,
3.3 photos per second).
4.6 Rolling shutter speed
The LED-Panel can be used in CONTINUOUS and TRIGGER EXT operating modes. The LED-
Panel is connected to a remote release in TRIGGER EXT operating mode and starts by using
this switch. Due to the two buttons having different release points, a time lag can occur between
starting the LED-Panel and camera release. We have developed a device that is guaranteed to
push both buttons (micro switch and camera release button) in less than five milliseconds. The
so-called iQ-Trigger activates the camera release mechanically. The iQ-Trigger is available as a
separate product.
All ten rows of LEDs are operated simultaneously in the rolling shutter operating mode. This
means that a whole column of LEDs runs across the panel instead of single LEDs. Cameras
with a rolling shutter show an offset in the taken picture between the LEDs in the running
column. The time can be read from this offset, which is required to read out the LED-Panel
image.
For this measurement, we recommend framing the field of the LEDs in the image so that they fill
the whole image height.
Figure 10
Figure 9
