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5. Various Settings
(5-1) Operation mode
●
CCD output system ······ SINGLE output
( output from single port)
●
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.
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 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.
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.
Partial scan
The read out for each frame is conducted by the partial readout scanning.
The vertical width of the longitudinal picture area corresponds to 790 lines at 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 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” in the asynchronous shutter mode
together with the shutter switch position of “9”.
(!) With the conventional products, the pulse width operation mode is always enabled when “9” is selected for the shutter
switch in the asynchrony shutter mode. Carefully note that this camera, however, will be in the preset shutter mode
when “PWC=DISABLED (prohibited)” is set, even if the shutter switch is positioned at “9”.
[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).
(!) This camera does not support the functions of “low speed/asynchronous shutter”.
Electroni c shutter
o peration mode
No shutter
oper ation
Elec tr oni c shutter
operation
Shutter
swi tch = 0
Shu tter switch = 1 to 9
As ync hrono us shu tter
l ow sp eed
shutter
High speed
shu tter
Preset
shutte r
Pulse width
con tr ol
Contin uous shutter
Hi gh sp eed
sh utter
Fig. 5-1 Electronic shutter operation modes