44 • Operational Reference Genie Monochrome Series-GigE Vision CameraExposure ControlsExposure Control modes define the method and timing of how to control the sensor integration period. Theintegration period is the amount of time the sensor is exposed to incoming light before the video frame data istransmitted to the controlling computer.• Exposure control is defined as the start of exposure and exposure duration.• The start of exposure can be an internal timer signal (free-running mode), an external trigger signal, or asoftware function call trigger.• The exposure duration can be programmable (such as the case of an internal timer) or controlled by the externaltrigger pulse width.• For the Genie camera, exposure control modes are "Free-running Programmable Exposure" on page 44 (timer),"External Trigger Programmable Exposure" on page 45 (timer) and "External Trigger Level-controlledExposure" on page 46 (trigger pulse width). Following are details for each mode.Free-running Programmable ExposureGenie is in a multifunctional free running mode with the following features:• Internal trigger programmable from maximum sensor frame rate down to 0.1Hz.• Exposure duration is user programmable (exposure maximum is dependent on the frame rate). Minimumexposure is 100μs.• Supports vertical and horizontal binning.• Exposure synchronization timing is "Synchronous Mode" on page 48 where the exposure is aligned with thesensor horizontal line timing and the next acquisition is triggered by an internal programmable timer.• Image readout is simultaneous where the grabbed image frame is readout during the next frame exposure time.This allows for fastest possible frame rates. See the timing diagram below.Free-running Programmable Exposure Timing
