Rainbow Electronics ATMOS™ 1M60 - Manual (Page 6)

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5429B–IMAGE–04/05
ATMOS -1M60/1M30 [Preliminary]
4. Timing
4.1 Synchronization Modes
The camera operates in rolling shutter mode.
4.1.1 Optimal Use of the Rolling Shutter
As shown in the following timing diagrams, Figure 4-1 , exposure does not happen at the same
time for all lines, which can lead to image distortion when capturing fast moving objects. The
way to bypass this, is to use the camera with a strobe light or a shutter element so that all the
lines are exposed during the same time and no image distortion is visible when capturing fast
moving objects.
The integration time for each line is: readout (+ programmable shutter time, when used). A shut-
ter signal is provided to strobe a light source or to drive a shutter element. You can set the
camera to operate in one of the following synchronization modes: periodic, triggered, triggered
without full reset and ITC. See register Mode Control @ 204H, Internal Register Mapping on
page 17 .
4.1.2 Free-run Mode (or Periodic Mode)
Principle: The camera operates in periodic mode.
The period is defined by readout time (+ programmable shutter time, when used). Valid data is
forwarded to the CameraLink interface during the next frame readout starting with the first line.
If shutter time is set to 0:
The frame N is readout while the first line integrates for frame N+1. As soon as the frame N
readout has ended starts the readout of frame N +1.
Figure 4-1. Free-run Mode Chronogram
Line 1
Integration
(frame N)
Frame N
Readout
Line 1 Readout
and Reset
Line n
Integration
(Frame N) Line n Readout
and Reset
Frame N+1
Readout