A CMOS high background-light immunity position-sensitive detector (PSD) with light flicker noise filter for high background light environment

This paper presents a CMOS position-sensitive detector (PSD) designed with enhanced immunity to high background light and equipped with a light flicker noise filter, making it suitable for operation in environments with intense background illumination. The positions of light spots in the X and Y axes can be accurately determined, reducing the maximum linear error to below 3% under real conditions. The proposed chip measures 4.09 × 4.01 mm² and demonstrates versatility for usages in various high background light environments.