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9-4
FREE RUNNING MODE
The camera has the free running mode in which the exposure and readout timing can be set
by software command and controlled by the internal microprocessor. The free running mode
has normal readout mode (in which the exposure time is longer than the 1 frame readout
time) and electrical shutter mode (in which the exposure time is shorter than the 1 frame
readout time). These readout modes are automatically switched depending on the exposure
time setting.
9-4-1
NORMAL READOUT MODE
The normal readout mode is suitable for observation, monitoring, field of view and focus
adjustment, and animation because it can operate at 45 fps with full resolution, which is faster
than the video rate. In addition, the exposure time can be extended to collect more signals and
increase the signal-to-noise ratio if the object is dark. In the normal readout mode, the exposure
time is the same or longer than the 1 frame readout time. In this mode, the frame rate depends
on the exposure time, and it becomes frame rate = 1/exposure time. The maximum exposure
time is 10 s.
9-4-2
ELECTRICAL SHUTTER MODE
The electrical shutter mode is used to get a proper signal level when signal overflow
happens due to too much input photons in normal readout mode. In this mode, the frame
rate is 45 Hz at full resolution even when the exposure time is short.
Figure 9-3
Figure 9-4
C11440-10C Ver.1.2
17
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