Synchronous Readout Trigger Mode - Hamamatsu Photonics C11440-42U Instruction Manual

9-6-2-3

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.
(1) Normal operation (when the pulse count 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.
C11440-42U/C11440-42U01 Instruction manual_Ver.1.1
Figure 9-7 (Ex. rising edge)
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