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    • Andy Cordes

    Technical Support Engineer, MKS Newport

    Andy Cordes is a Technical Support Engineer at MKS Newport (Irvine, CA).

    FIGURE 1. Devices for detecting the position of a laser beam include: a) a position-sensitive detector (PSD), b) a quadrant-cell detector (quad cell), and c) a CMOS camera. The X and Y beam position on both the PSD and quad cell can be calculated from the detectors’ current outputs iA, iB, iC, and iD. The beam position on the camera is determined by finding the beam’s centroid.
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    DETECTORS: CMOS cameras allow robust active stabilization of laser beams

    Andy Cordes
    Aug. 1, 2011
    Accurate measurement of the position of a laser beam can be achieved in several ways, each with its strengths and weaknesses. A comparison of these has resulted in an active beam...