Overlapping Image Acquisitions For Aca1920-25, Aca2500-14, Aca3800-14, Aca4600-10 - Basler acA2040-55 User Manual

Image Acquisition Control
6.7.2 Overlapping Image Acquisitions for acA1920-25,
acA2500-14, acA3800-14, acA4600-10
Overlapped frame acquisition cannot be performed when the camera's

shutter is set for global reset release mode. Overlapped frame acquisition can
only be performed when the camera's shutter is in the rolling mode.
acA3800-14 and acA4600-10 cameras allow overlapped frame acquisition

only when they are triggered internally ("free run"), i.e. when Trigger Mode is
set to Off for the Frame Burst Start trigger and for the Frame Start Trigger.
When using a camera with a rolling shutter, there are two common ways for the camera to operate:
with "non-overlapped" acquisition and with "overlapped" acquisition.
In the non-overlapped mode of operation, each time a frame is acquired the camera completes the
entire acquisition process for a frame, consisting of exposure plus sensor readout, before
acquisition of the next frame is started. The acquisition of a new frame does not overlap any part of
the acquisition process for the previous frame. This situation is illustrated in
camera using an external frame start trigger.
ExFSTrig
Signal
Frame Acquisition N
Fig. 69: Non-overlapped Acquisition
In the overlapped mode of operation, the acquisition for a new frame begins while the camera is still
completing the acquisition process for the previous frame. This situation is illustrated in Figure 70.
158
Frame Acquisition N+1
Time
AW00123409000
Figure 69 with the
Frame Acquisition N+2
= Line Exposure
= Line Readout
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