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5. Various Settings
(5-1) Operation mode
Operation mode is classified into two groups as follows.
●
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 / partial scan
→
Refer to the following page (Section 6) for the
specific setting method.
(!) This camera does not support the asynchronous
shutter mode for the low speed shutter operation.
●
Fast dump
・・・・・・・・
Fast-dump / No fast-dump
Table 5-1. Description of electronic shutter operation modes
Shutter
mode
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 permissible shortest repetition pitch is [exposure time + 1 frame duration].
Type
of
shutter
speed
Normal shutter
(High speed shutter)
Shutter, the exposure time of which 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 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 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.
Double pulse
(2 Triggers)
In case of the asynchronous shutter setting only, the shutter, shutter speed of which
corresponds to the time difference between two external trigger inputs (Trig-A,Trig-B) ,
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 (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.
Draft scan
The read out for each frame is conducted by the draft readout scanning (35.7Hz).
4 lines out of every 16 lines are read out for all pixels.
Fast-dump scan
Fast-dump scan is conducted in the asynchronous shutter mode.
Smear which comes up in the high speed shutter mode is reduced only in the upper part of the
image 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 the shutter switch
positions from “1” to “9” (PWC (where pulse width operation mode
setting)=DISABLED) or from “1” to “8” (PWC (where pulse width operation mode
setting)=ENABLE) 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. With this camera,
this is selected by setting as “PWC=ENABLED”, “2 TRIG=DISABLED” in the
asynchronous shutter mode together with the shutter switch position of “9”.
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
No fast-dump
Fast-dump
Double pulse
Fig. 5-1 Electronic shutter operation modes
