The effect of lens distortion in angle measurement based on four-quadrant detector

Simultaneous position prediction and intensity correction of quadrant detector-based detection system

“…The special structure of the four-quadrant detector enables the reuse of detection light intensity information, but it also brings problems, as shown in figure 2. In single pixel detection, the distribution of light spots on the detector does not affect the detection value; For four quadrant detectors, there are factors such as uneven distribution of channels and light spots that cause distortion in light intensity detection, while also affecting positioning accuracy and imaging quality [8], [9]. The structure of the laser semi-active seeker is analyzed.…”