Exposure Mode - JAI SP-25000M-CXP4A User Manual

Exposure Mode

This camera has three Exposure modes (Off, Timed, TriggerWidth).
Use [AcquisitionControl] settings to perform operations and settings for exposure.
ExposureMode = Off
Exposure control is not performed (free-running operation).
The exposure time is the longest possible time within the operating conditions such
as the frame rate.
ExposureMode = Timed
Mode in which control is performed using exposure time. Acquire images using an
exposure time configured beforehand on an external trigger.
In this mode, the exposure time can be adjusted automatically by setting
[ExposureAuto]. For details, refer to "ALC (Automatic Brightness Control) Function".
ExposureMode = TriggerWidth
Mode in which control of the exposure time is performed using the pulse width of
the trigger input signal. The exposure time will be the same as the pulse width of
the trigger input signal.
Trigger
Exposure
• The settings for exposure control and triggers are related to each other. Be sure to
configure the settings described in "Trigger Control".
Actual Exposure Times
The minimum exposure time that can be configured are as follows.
ExposureMode
Timed
TriggerWidth
The actual exposure time will consist of the image sensor's offset duration (8 μs)
added to the setting configured on the camera.
When [ExposureMode] is set to [Timed] and the exposure time is set to 1 μs, the
actual exposure time will be as follows.
1 μs + 8 μs (offset duration of image sensor) = 9 μs
When [ExposureMode] is set to [TriggerWidth], the exposure is slightly longer than
the width of the trigger signal. To achieve an exposure time of 9 μs and the exposure
time offset is 8 μs, use 9 μs - 8 μs = 1 μs as the high or low time for the trigger signal.
Minimum exposure time
9us (8bit)
9us (8bit)
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SP-25000M-CXP4A/SP-25000C-CXP4A
Acquisition
Control