Teledyne Linea GigE 2K, User Manual

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Linea GigE Series Camera Operational Reference
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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.
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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.
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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 GigE in the Internal Programmable Exposure mode has the following features:
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The TriggerSource feature (see I/O Control category) selects an internal signal as trigger.
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Programmable internal trigger, where the maximum line rate limit is related to the
ExposureTime feature.
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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 for the
exposure start being an external user input.
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The TriggerSource feature (see I/O Control category) selects an external signal line as trigger.
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Line rates and exposure limits are as defined for Internal Programmable Exposure.
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The following timing graphic is an example of an external programmable exposure with
exposure time set to 50µs and external trigger activation set ‘FallingEdge’):