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5. Various Settings
(5-1) Operation mode
●
CCD output mode ······· DUAL / SINGLE
●
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)
●
Scanning system ········· Normal scan / partial scan
→ Refer to section 6 for specific setting procedure.
(!)
This camera does not support the functions of
“low speed/asynchronous shutter”.
Table 5-1. CCD output modes
CCD
output
mode
DUAL output
Image signal is output from light-and-left output ports simultaneously. High speed
readout is realized by using two output ports.( High frame rate)
SINGLE output
Image signal is output from single output port. Stable image can be obtained by using
single output port sacrificing the frame rate to some extent.
Table 5-2. 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].
Table 5-3. Type of shutter speed
Type
of
shutter
speed
Normal shutter
(High speed shutter)
Shutter ,of which the exposure time is less than one frame, is used.
The exposure time 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 exposure time 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 the exposure
time corresponds to the pulse width (during L level) of the external trigger input
(Vinit), is released.
Exposure time can be set as nH (n = 1 or larger integer number) in H (horizontal
synchronous time) unit.
Table 5-4. Other operation mode
Scanning
system
Normal scan
The readout for each frame is conducted by the all pixel readout scanning.
Double speed scan
The readout for each frame is conducted by the double speed scanning (2 lines
binning). Image data is vertically compressed in half.
(!) Sometimes light and dark may be reversed because of vertical binning of image signal when the image signal
becomes excessively saturated. In that case, lower the image signal level (e.g. by
stopping down the aperture of the
lens a notch)
(!) If the double speed scanning is used in the color camera (FS11000GE), it becomes difficult to obtain the normal
color image as the color information is also added up.
[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 6-1.
[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).
Electr onic shutter
operation mode
No sh utter
oper ation
Electronic shutter
oper ation
Shutter switch = 0
Shutter switch = 1 to 9
Asynchronous shutter
Low speed shutter
Preset shutter
High speed shutter
Preset shutter
High speed shutter
Pulse width contr ol
C ontinuous shutter
High speed shutter
Preset shutter
Fig. 5-1. Electric shutter mode