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Electroni c shutter
oper ation mode
No shutter
oper ation
Elec tr oni c shutter
operation
Shutter
swi tch = 0
Shutter switch = 1 to 9
As ync hronous shutter
l ow speed
shutter
High speed
shutter
Preset
shutter
Pulse width
contr ol
Continuous shutter
Hi gh speed
shutter
5. Various Settings
(5-1) Operation mode
●
CCD output
…
Single out
(1 port output)
●
Electronic shutter operation mode
Shutter mode
…
No shutter / continuous
/ asynchronous
Shutter speed category
…
High speed / low speed
/ pulse width control
(See the right schematic diagram)
●
Scanning system
…
Normal scan
→
Refer to the Section 6-3 for the specific setting
method.
(!) This camera does not support the asynchronous shutter mode
for the low speed shutter operation and the partial scan mode.
Table 5-1. Description of electronic shutter operation modes
Shutter mode
No shutter
Electronic shutter is not used.
Exposure time of imaging device is equivalent to one frame time.
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 permissible shortest repetition pitch is [exposure time + 1 frame time].
Type of
shutter speed
Normal shutter
(High speed shutter)
Shutter, the exposure time of which is less than one frame time, is used.
The shutter speed can be set as a preset shutter speed at 9 different levels both for the continuous
shutter/asynchronous shutter mode.
(!) As for the shutter speed of the conventional FC series cameras, 8 different levels for the
asynchronous shutter mode.
Low speed shutter
The shutter, the exposure time of which 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
In case of the asynchronous shutter setting only, the shutter, shutter speed of which 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.
[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 preliminarily set by the
hypothetical shutter switch positions from “1” to “9” for the continuous shutter
operation or the asynchronous shutter operation. The shutter speed is defined in
the Table 6-1.
[Terminology] Pulse width control ······· This is the way of setting or controlling the shutter speed by the width of the Vinit
signal that is externally input in the asynchronous shutter mode.
[Terminology] High speed shutter ······· This means the shutter of which shutter speed is shorter than 1 frame time(=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 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).
(!) This camera does not support the functions of “low speed/asynchronous shutter” and “partial scan for the central area”.
Fig. 5-1 Electronic shutter operation modes