Hamamatsu Photonics C11440-36U, Инструкция по эксплуатации

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C11440-36U Instruction Manual Ver.1.1
16
FREE RUNNING MODE 9-3
The camera has Free running mode which the exposure and readout timing can be set by
software command and controlled by an internal microprocessor. 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.
• Please contact to Hamamatsu subsidiary or local distributor for the detail of the timing
information.
9-3-1 NORMAL READOUT MODE
Normal readout mode is used so that the exposure time can be extended to collect more signals
and increase the signal-to-noise ratio if the object is dark.
Figure 9-2 Normal readout mode
9-3-2 ELECTRICAL SHUTTER MODE
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.
Figure 9-3 Electrical shutter mode
Internal exposure time
setting
Readout start signal
0H
1H
2H
・
・
(LAST-1)H
(LAST)H
Sensor readout
Camera data output
Global exposure timing
output
Exposure time Exposure time Exposure time Exposure time
*1
*1 The memory standby time = 10H (
≈
124.4 µs)
Internal exposure time
setting
Readout start signal
0H
1H
2H
・
・
(LAST-1)H
(LAST)H
Sensor readout
Camera data output
Global exposure timing
output
Exposure Exposure Exposure Exposure
*1
*1 The memory standby time = 10H (
≈
124.4 µs)