High-speed, smear-free still image capture is the hallmark of global shutter image sensors. Applications such as traffic management, metrology and robotics inspection all need to image fast-moving objects without smear or distortion. To meet this need, Teledyne DALSA offers cameras with true global shutter CMOS sensors. These imagers have the ability to electronically shutter itself and "stop the action."
To stop the action, the camera starts and stops exposure of all pixels in an array simultaneously, under electronic control. This functionality requires specific design features, and not all sensors have them. Full-frame CCDs require mechanical shutters or strobing to achieve this result, introducing more cost and complexity into the vision system. Frame-transfer CCDs may not provide the speed required, or may be difficult to cost-justify due to the extra silicon required for the storage area.
Standard rolling-shutter CMOS sensors distort images of moving objects because they only read out one line of their arrays at a time—by the time they read the next line, the object has moved. This distortion is a major obstacle for machine vision applications such as automated sorting or defect inspection—objects that that should be a "pass" are judged as "fail" because the image fed into the pattern-matching algorithms is distorted. For example, instead of valid round holes, the system would see unacceptable ellipses.
But interline CCDs and true global shutter CMOS sensors are ideally suited to imaging fast-moving objects. They capture crisp images without smear or distortion by electronically shuttering all pixels simultaneously even at short exposure times.
86 Megapixels, 16 fps, and CMOS global shutter for smear-free imaging and exposure control.
With up to 12 megapixels and up to 168 fps, the Falcon2 delivers high quality images of fast-moving objects. No smear. No distortion.
High Speed. Low Noise. Global Shutter. Genie Nano redefines low cost performance from VGA to 25MP.
Teledyne DALSA is part of the Teledyne Imaging Group, and our sister companies offer related and complementary sensor capabilities, including global shutters:
