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[Terminology] Fast-dump mode....
(!) This camera does not support the functions of "low speed/asynchronous shutter".
[Explanation]
Fast-dump operation is effective in the preset/high speed/asynchronous shutter mode.
In case of the infra-ray-emitting high-intensity object, it often happens by the nature of CCD sensor that
even the low intensity part is displayed whitely like a vertical streak above and below the high-intensity
object by reason that the generated charges leak into the transfer channel of CCD sensor even outside
of exposure time.
This phenomenon is called"smear". Shorter the exposure time gets, higher the relative ratio of
brightness against the normal Image part becomes, and it poses impediment for image processing.
This camera is equipped with "Fast-dump function" in the asynchronous shutter operation
as standard and this contributes to reduction of smear (especially for the smear extending upward
of the image). Exposure starting time is delayed for the dumping time, if the high-speed dump is
selected.
The effect of smear which appears in capturing images of high-intensity object can
be reduced only for the upper side above the image by quickly dumping (sweeping
out) unnecessary charges in the transfer channel of the CCD imaging device right
after the trigger pulse is input in the asynchronous shutter operation.(one sided
smear behavior)
Exposure starting time is delayed for the dumping time (82H=approx.8ms), if the
Fast-dump is selected.
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M10510B;15/58
Without Fast-dump
With Fast-dump
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