Optoelectronic sensor for measuring the intensity and the direction of incidence of a light beam

摘要

The sensor has an optical system (3) which forms a light spot (4) on the surface of a matrix (10) of photodiodes or photocells each corresp. to one pixel. The signals from these are processed by shapers in a double network of pixel interconnections corresp. to concentric circles (hexagons) and radii (broken lines) respectively. The processing determines the position of the spot centre whose co-ordinates give an image of the angles of azimuth and elevation (h) calculated by respective circuits. A correction factor for each photocell allows for losses by reflection from the lens (5). The light intensity is also calculated.