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4. Camera Operation
The camera can grab images in one of three ways. You determine the three imaging modes
using a combination of the Exposure Mode parameters (including I/O parameters), Exposure
Time and Line Rate parameters.
Description
Line Rate
Exposure Time
Trigger Source
(Sync)
Internal line rate and exposure time
Internal, programmable
Internal programmable
Internal
External line rate and exposure time
Controlled by EXSYNC
pulse
External (EXSYNC)
External
EXSYNC pulse controlling the line
rate. Programmed exposure time.
Controlled by EXSYNC
pulse
Internal programmable
External
Figure 18. Exposure controls
The parameters used to select the imaging modes—trigger sources (sync), exposure time,
and line rate—are grouped together as the Camera Controls.
Camera Controls
Parameter
Description
Line Rate (in Hz)
Camera line rate in Hz. Only available when the start line trigger parameter is
disabled (Trigger Mode off).
Exposure Mode
Set the operation mode for the camera‘s exposure.
Trigger Width or Timed. Trigger Width is only available when Trigger Mode is
enabled.
Trigger Width
Uses the width of the current line trigger signal pulse to control the exposure
duration.
Timed
The exposure duration time is set using the Exposure Time feature and the
exposure starts with the Line Start event.
Exposure Time
Sets the exposure time (in microseconds). Exposure Mode feature must be set to
Timed
Exposure Modes in Detail
1. Internally Programmable Line rate and Internally Programmable Exposure Time (Default)
Line rate is the dominant factor when adjusting the line rate or exposure time. When setting
the line rate, exposure time will decrease, if necessary, to accommodate the new line rate.
When adjusting the exposure time the range is limited by the line rate.
Note
:
The camera will not set line periods shorter than the readout period.
GenICam parameters to set:
I / O Controls > Trigger Mode > Off
2. External Line Rate and External Exposure Time (Trigger Width)
In this mode, EXSYNC sets both the line period and the exposure time. The rising edge of
EXSYNC marks the beginning of the exposure and the falling edge initiates readout. Note:
