ORCA-Lightning Digital CMOS Camera C14120-20P Instruction manual_Ver.2.5
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(4) Global reset Level trigger mode
The Global reset function enables to reset the electric charge of all pixels at the same time. Then
all pixels can start exposure at the same time.
The example below is for the trigger level High. With this Global reset Level trigger mode, the
exposure of all pixels begins when the trigger signal becomes “High”.
Figure 10-8
(Example for level High)
(5) Synchronous readout trigger mode
The Synchronous readout trigger mode is used for continuous imaging when it is necessary to
control the exposure start timing of each frame from an external source. It is useful for confocal
microscopy. For example, when the camera is used with a spinning disk confocal microscope
and the camera exposure time is synchronized to the spinning disk's rotation speed, it is possible
to eliminate uneven illumination (called banding noise) caused by variation of the spinning disk
rotation speed. Also, it is useful for securing as long exposure time as possible while controlling
the exposure start timings by external trigger signals.
a. Normal operation
The Synchronous readout trigger mode is used for continuous imaging when it is necessary to
control the exposure start timing of each frame from an outside source and also when it is
necessary to secure as long exposure time as possible. In the Synchronous readout trigger
mode, the camera ends each exposure, starts the readout and also, at the same time, starts
the next exposure at the edge of the input trigger signal (rising edge / falling edge). That is, the
interval between the same edges of the input trigger becomes the exposure time.