Position-Sensitive Detectors are photodetectors that report where a light spot falls on their active area. Segmented types, such as quadrant and octant photodiodes, compare signals from separate cells, while lateral-effect types use resistive layers to produce a continuous position output. They are used for beam alignment, laser tracking, autofocus, microscopy, surgical laser systems, and spacecraft pointing. GPD Optoelectronics manufactures quadrant, Octo™, and tetralateral position-sensitive photodiodes.
GPD Optoelectronics will exhibit at SPIE BiOS Expo 2027, January 30-31 in San Francisco. Visit Booth #8233 to discuss photodiode solutions for optical power monitoring, beam alignment, spectroscopy, and faster prototyping in biomedical systems.