Dalsa 1M75-SA User Manual
Also see for 1M28-SA: User manual
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Contents
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24 PRELIMINARY 1M28 and 1M75 User’s Manual03-32-00525-03 DALSAFigure 12: Free Running Mode, Constant Image Data RateFrame TimerIntegration Readout IntegrationResetFigure 13: Free Running Mode, Variable Image Data RateIntegration Readout Integration ReadoutGlobal Shutter TimingWith a global shutter, the sensor starts with a global reset of all pixels. Then during theintegration time, photo-generated electrons are collected in the pixels. After the exposuretime, the collected electrons are transferred to a storage node, and sequential readout ofthe sensor matrix begins. As a result, all pixels are exposed to light for the same amountof time, resulting in crisp images that do not suffer from the time displacement artefactscharacteristic of rolling shutter CMOS cameras.Figure 14: Global Shutter TimingResetDataGlobal shutterReset Integration Frame ReadoutFreerunning ModeThe freerunning mode is the factory set timing mode at power up and captures imageswithout the need for an external control signal. The sensor data is read out after the setintegration time. After the sensor is finished reading out, the sensor resets and thesequence begins again. The date is output on the rising edge of the pixel clock.The signals FRAME_VALID (FVAL) and LINE_VALID (LVAL) mask valid imageinformation. The number of clock pixels after exposure CPRE is defined by the calculationof the frame time |
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