External Control Mode; Edge Trigger Mode - Hamamatsu Photonics C11440-10C Instruction Manual

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C11440-10C Ver.1.2

9-5

EXTERNAL CONTROL MODE

The camera has various external control functions to synchronize the camera with the

external equipment. In the external control mode, the external equipment becomes a master

and the camera becomes a slave.

9-5-1

The edge trigger mode is used so that the exposure is synchronized with an external signal.

9-5-1-1

Normal edge trigger mode

The normal edge trigger mode is used so that the exposure starts according to an external signal.

Exposure time is set by software commend. In this mode, the exposure of the first line begins on

the edge (rising/falling) timing of the input trigger signal into the camera. (0H in Figure 9-5) The

exposure of the second line is begun after the readout time of one line passes (1H in Figure 9-5),

and the exposure is begun one by one for each line. The example timing chart below shows a

rising edge trigger.

9-5-1-2

Global exposure edge trigger mode

The global exposure edge trigger mode is used when imaging with a pulsed light source such as

pulsed laser or flash lamp. The exposure time can be set by software command. In this mode,

the camera combines the frames right before and after the global exposure trigger signal

(falling/rising edge) into one frame and output them as one frame of data. The exposure time of

this second frame can be set by software command. Minimum value of exposure time setting is

about 22 ms (1 frame readout time).

Figure 9-5

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