QUADRANT PHOTODETECTOR AND RELATED METHOD FOR SUN TRACKING

摘要

A quadrant photodetector has four photosensor arranged in quadrature and an opaque mask arranged at a predefined distance from the photosensor and it extends from the center of the photodetector until covering, in a top view, about half the area of each photosensor. Such a quadrant photodetector is very cost effective and it allows a high spatial resolution in a specific angle range and it is able to give useful information in a wider angle range. A very efficient method for sun tracking can be associated to the above photodetector.