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C11440-36U Instruction Manual Ver.1.1
9-4-4
START TRIGGER MODE
Start trigger mode is to start operating the camera by a trigger input for continuous imaging,
and it works at the highest frame rate because it is operated in internal trigger mode. In Start
trigger mode, the camera starts exposure and switches to internal trigger mode by the edge of
an external trigger signal (rising / falling edge).
External trigger
Internal exposure time
setting
Readout start signal
0H
1H
2H
・
・
(LAST-1)H
(LAST)H
Sensor readout
Camera data output
Global exposure timing
output
Trigger ready output
9-4-5
TRIGGER DELAY FUNCTION
In most cases when a delay is needed between the laser pulse emission and the exposure start
is needed, a delay unit is set between the laser and camera to control trigger timing. In each
External trigger mode of the camera, the delay can be set to the trigger signal input to the
camera by command. With this setting, a range of trigger can be arranged without a delay unit.
The range for delay time is 0 µs to 10 s and the minimum setting steps is 1 µs.
9-5
SOFTWARE TRIGGER MODE
The camera has two software trigger functions, Edge trigger mode and Start trigger mode. Each
software trigger function is basically same as External trigger mode. The software trigger modes
enable to control the exposure start timing of the camera as well as External trigger mode, but
through application software. Therefore software trigger mode cannot precisely control the
exposure start timing of the camera than External trigger mode. It depends on the performance
of host system. Also, trigger delay function is available.
•
Please contact to Hamamatsu subsidiary or local distributor for the detail of the timing
information.
20
*1
*2
Exposure
*1 The memory standby time + Jitter = 10H (≈ 124.4 µs) + up to 1H (≈ 12.4 µs)
*2 The memory standby time = 10H (≈ 124.4 µs)
Figure 9-8 Start trigger mode
Exposure
Exposure
Exposure
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