Basler Vision Technologies Sprint Series, Руководство пользователя

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Line Acquisition Modes
Basler sprint Mono Cameras 41
3.3 Dual Line [Max 140 kHz] Acquisition
Modes
Two dual line acquisition modes are available:
„
Dual Line [ Max 140 kHz ] - Line A First
„
Dual Line [ Max 140 kHz ] - Line B First
When Dual Line [ Max 140 kHz ] - Line A First acquisition modes is active, the camera will use both
line A and line B. When an acquisition is triggered, both lines in the sensor are exposed. When
exposure is complete, the pixel values from the line A are read out of the sensor and transmitted
from the camera. While the pixel values from line A are being read out, the values from line B are
also read out, but they are held in a buffer in the camera. The next time that an acquisition is
triggered, the pixels from line B are transmitted but no exposure will occur.
When Dual Line [ Max 140 kHz ] - Line B First acquisition modes is active, the camera will use both
line A and line B. When an acquisition is triggered, both lines in the sensor are exposed. When
exposure is complete, the pixel values from the line B are read out of the sensor and transmitted
from the camera. While the pixel values from line B are being read out, the values from line A are
also read out, but they are held in a buffer in the camera. The next time that an acquisition is
triggered, the pixels from line A are transmitted but no exposure will occur.
If the object being imaged will cross line A first and line B second (the image of the object will cross
line B first and line A second; see Figure 16 on page 44 ), you should use the Line A First mode. If
the object being imaged will cross line B first and line A second (the image of the object will cross
line A first and line B second), you should use the Line B First mode.
The maximum line acquisition rate when the camera is set for a dual line mode is 140 kHz at full
resolution. If the AOI feature is used, the maximum line acquisition rate may be higher. See
Section 6.2 on
page 118 and Section 4.3 on page 74 for more information.
Note
The Dual Line [Max 140 kHz] acquisition modes are only available on spL2048-
140km and spL4096-140km cameras.