Dalsa Everywhereyoulook Linea Lite GigE, Руководство пользователя

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Linea Lite GigE Series Camera Operational Reference • 59
Gain Gain Sets the selected gain as an amplification factor
applied to the image. Valid range is 1 - 10, in
increments of 0.0078125. Beginner
Black Level Selector BlackLevelSelector Selects which tap is controlled by the Black Level
feature. Beginner
Digital DigitalAll Digital black level offset.
Black Level (in DN) BlackLevel Black level (offset) in DN. Expert
Exposure Controls Details
Exposure Control modes define the method and timing of controlling the sensor integration period.
The integration period is the amount of time the sensor is exposed to incoming light before the
video line data is transmitted to the controlling computer.
• Exposure control is defined as the start of exposure and exposure duration.
• The feature Exposure Mode selects the controlling method for the exposure.
• The start of exposure can be driven by an internal timer signal, an external trigger signal, or a
software function call.
• For External Trigger signals, the relationship between an external line trigger and the exposure
period as shown in the timing diagrams below is only applicable while the external line trigger
does not exceed the maximum allowable line rate.
Internal Programmable Exposure
The Linea Lite GigE in the Internal Programmable Exposure mode has the following features:
• The TriggerSource feature (see I/O Control Category) selects an internal signal as trigger.
• Programmable internal trigger, where the maximum line rate limit is related to the
ExposureTime feature.
• Exposure duration is user programmable (exposure maximum is dependent on the line rate).
Minimum exposure (in µs) is model dependent.
External Programmable Exposure
The External Programmable Exposure mode is similar to Internal Programmable except the
exposure start is an external user input.
• The TriggerSource feature (see I/O Control Category) selects an external signal line as trigger.
• Line rates and exposure limits are defined by Internal Programmable Exposure.
• The following timing graphic is an example of an external programmable exposure with
exposure time set to 50 µs and external
trigger activation set ‘FallingEdge’):
Preliminary