M10510B;14/58
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Electr onic shutter
operation mode
No sh utter
oper ation
Electr onic shutter
operation
Shutter
switch = 0
Shutt er switch = 1 to 9
Asynchr onous shutter
low speed
shutter
High speed
shutter
Preset
shutter
Pulse width
contr ol
Continuous shutter
High speed
shutter
Without
Fast-dump
With
Fast-dump
5. Various Settings
(!) This camera is not equipped with the substantial shutter setting switch on the rear panel. “Shutter switch” or “Mode switch”
described below means setting values of hypothetical shutter switch set on the memory inside the camera via serial
communication command.
→
Refer to (5-8) for the specific setting method.
(5-1) Operation mode
●
Electronic shutter operation mode
Shutter system
No shutter / continuous/asynchronous
Type of shutter speed
High speed / low speed/pulse width control
(See the right schematic diagram)
●
Reset mode
It is able to select whether or not to reset the internal
horizontal
synchronous
timing
(H)
when
in
asynchronous shutter mode.
Shutter system
Without H-reset / With H-reset
●
Fast-dump ·········Without Fast-dump / With Fast-dump
Table 5-1. Description of electronic shutter operation modes
Shutter
system
No shutter
Electronic shutter is not used.
Exposure time of image sensor is equivalent to one frame duration.
Exposure is continuously performed for each frame.
Continuous shutter
Repeats exposure regardless of external trigger input (Vinit).
Repetition pitch is per frame.
Asynchronous
shutter
Electronic shutter is released each time the external trigger is input (Vinit).
The shortest repetition pitch is [exposure time + 1 frame duration].
Type
of
shutter
speed
Normal shutter
(High speed shutter)
Shutter ,of which the exposure time is less than one frame, is used.
The shutter speed can be set as a preset shutter speed at 9 different levels both for
the continuous shutter/asynchronous shutter operations.
Low speed shutter
The shutter, of which the exposure time is two frames or over, is used.
(Only for continuous shutter mode) The shutter speed can be set as a preset shutter
speed at 9 different levels.
(Note) This camera allows this setting only for the continuous shutter mode.
Pulse width control
Only in the case of asynchronous shutter setting, the shutter, of which shutter speed
corresponds to the pulse width (during L level) of the external trigger input (Vinit), is
released.
Shutter speed can be set as nH (n = 1 or larger integer number) in H (horizontal
synchronous time) unit.
Table 5-2. Description of other electronic shutter operation modes
Scanning
system
Normal scan
The read out for each frame is conducted by the all pixel readout scanning. (5Hz)
Partial scan
The read out for each frame is conducted by the partial readout scanning.(10Hz)
The vertical width of the longitudinal picture area corresponds to approx. one-half of
the central portion of the image pickup area.
Fast-dump scan
The read out in the midst of high speed/preset/asynchronous shutter operation is
conducted with high-speed fast-dump operation. The smear which appears in high
speed shutter operation is reduced only on the upper side above the image.
[Terminology] Preset shutter············ This refers to the shutter speed setting other than those specified by the pulse width
control. More specifically, the shutter speed is set by the shutter switch positions
from “1” to “9” for the continuous shutter operation, or the shutter switch positions
from “1” to “9” (PWC (Pulse width control mode)=DISABLED) or from “1” to “8”
(PWC (Pulse width control mode)=ENABLE) for the asynchronous shutter operation.
The shutter speed is defined in the Table 5-3.
[Terminology] Pulse width control ····· This is the way of setting and controlling of the shutter speed by the width of the Vinit
signal that is externally input in the asynchronous shutter mode. With this camera,
this is selected by setting PWC to “ENABLED” and the shutter switch position to “9”
in the asynchronous shutter mode.
[Terminology] High speed shutter ····· This means the shutter of which shutter speed is shorter than 1 frame duration (=1
vertical synchronous time). The shutter speed is set as a preset fixed length of the 9
different levels that are determined by the position of the shutter switch (continuous
shutter and asynchronous shutter).
[Terminology] Low speed shutter ······ This means the shutter of which shutter speed is longer than 1 frame duration. The
shutter speed is set as a preset fixed length of the 9 different levels that are
determined by the position of the shutter switch (continuous shutter).