Free Running Mode - Hamamatsu Photonics C11440-22CU Instruction Manual

C11440-22CU/C11440-22CU01 Instruction manual_Ver.1.4

10-2-4 FREE RUNNING MODE

The camera has the free running mode which the exposure and readout timing can be set
by software command and controlled by an 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.
Note
• Please contact to Hamamatsu subsidiary or local distributor for the detail of the timing information.
10-2-4-1 Normal readout mode
The normal readout mode is suitable for observation, monitoring, field of view and focus
adjustment, and animation because it can operate with full resolution, which is faster than the
video rate*. (* at Camera Link = 100 frame/s, at USB 3.0 = 30 frame/s)
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.
Figure 10-4
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