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A 120×110 sensitive and light selective position sensor array with wide dynamic range is presented. The sensor can detect the position of a low-intensity light projected on nonuniform background illumination for a robust range finding system. It achieves -18-dB signal-to-background ratio (SBR) light detection in wide range of 48-dB background illumination due to a modulated light projection and correlation technique on the sensor plane. It also realizes selective light detection for multiple light projection systems. The range finder has been fabricated in 0.6-μm CMOS process and successfully tested. The range finding system achieves <1.5-mm range accuracy at 1000 mm using a low-intensity projected laser beam in a nonuniform target scene.