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Electronic shutter
operation mode
No shutter
operation
Electronic shutter
operation
Shutter switch = 0
Shutter switch = 1 to 9
Asynchronous shutter
low speed
shutter
High speed
shutter
Preset
shutter
Pulse width
control
Continuous shutter
High speed
shutter
Low speed
shutter
Preset
shutter
Shutter switch = 1 to 8
Shutter switch = 9
Shutter switch = 1 to 8
5. Various Settings
(5-1) Operation mode
●
Electronic shutter operation mode
Shutter mode
No shutter/continuous/asynchronous
Shutter speed category
High speed/low speed/pulse width control
●
Scanning system ···· Normal scan/partial scan
→
Refer to the following page (Section 6) for
the specific setting method.
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 for the continuous
shutter and 8 levels for asynchronous shutter mode.
Low speed shutter
The shutter, the exposure time of which is two frames or over, is used.
(Both for continuous and asynchronous shutter mode)
The shutter speed can be set as a preset shutter speed at 9 different levels for the continuous
shutter and 8 levels for asynchronous shutter mode.
Pulse width control
In case of the asynchronous shutter setting only, the shutter of which the exposure time
corresponds to the pulse width (during an effective 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 operation modes
Scanning
system
Normal scan
The read out for each frame is conducted by the all pixel readout scanning(30Hz)
Partial scan
The read out for each frame is conducted by the partial readout scanning(60Hz)
The vertical width of the longitudinal picture area corresponds to one half of the central portion of
the image pickup area.
[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 shutter switch
positions from “1” to “9” for the continuous shutter operation or from “1” to “8” for 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. It is set when the
shutter switch position is “9” 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
(for the continuous shutter) or 8(for the asynchronous shutter) different levels that
are determined by the position of the shutter switch.
[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 (for the continuous shutter) or
8(for the asynchronous shutter) different levels that are determined by the position
of the shutter switch.
(5-2) Setting of shutter speed
The shutter speed is determined mainly by the shutter switch position from “0” to “9”.
When a shutter speed is specified using a communication command, the communication command is prioritized.
→
Refer to the next section (Section 6) for the specific setting method.
(!) Since FC1500F is equipped with the independent shutter setting switch and mode setting switch, it does not require
the setting manipulation for the current shutter speed.
Fig. 5-1 Electronic shutter operation modes