qCMOS Camera C15550-20UP Instruction manual_Ver.1.0
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(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.
Normal operation (when the Trigger Time is set as 1.);
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 / falling edge). That is, the interval between
the same edges of the input trigger becomes the exposure time.
Figure 11-9 (Ex. rising edge)
* Delay + Jitter = 4H + Maximum. 1H
Standard scan: 1H = 7.2 µs
Ultra quiet scan: 1H = 172.8 µs
