Basler raL2048-48gm User Manual download pdf (Page 123)

AW00118302000 Acquisition Control

Basler racer GigE 113

8.2.7 Overlapping Exposure with Sensor Readout

The line acquisition process on the camera includes two distinct parts. The first part is the exposure

of the pixels in the imaging sensor. Once exposure is complete, the second part of the process –

readout of the pixel values from the sensor – takes place. In regard to this line acquisition process,

there are two common ways for the camera to operate: with “non-overlapped” exposure and with

“overlapped” exposure.

In the non-overlapped mode of operation, each time a line is acquired the camera completes the

entire exposure/readout process before acquisition of the next line is started. The exposure for a

new line does not overlap the sensor readout for the previous line. This situation is illustrated in

Fig. 37 with the camera set for the trigger width exposure mode.

In the overlapped mode of operation, the exposure of a new line begins while the camera is still

reading out the sensor data for the previously acquired line. This situation is illustrated in Fig. 38

with the camera set for the trigger width exposure mode.

Line Acquisition N

Exposure Readout

Line Acquisition N+1

Exposure Readout

Line Acquisition N+2

Exposure Readout

Time

ExLSTrig

Signal

Fig. 37: Non-overlapped Exposure and Readout

Line Acquisition N

Exposure Readout

Line Acquisition N+1

Exposure Readout

Line Acquisition N+2

Exposure Readout

Time

Line Acquisition N+3

Exposure Readout

ExLSTrig

Signal

Fig. 38: Overlapped Exposure and Readout

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Basler raL2048-48gm User Manual Page 123