THE MULTISCAN POSITION-SENSITIVE PHOTODETECTOR

摘要

A new type of position-sensitive photodetector, called the multiscan, has been developed. The operating principle of the device is based on an integral method of processing optical signals without scanning the device's entire field of view. A potential that corresponds to the position of the median of the light signal is generated at the output of the multiscan. Using the multiscan, it is possible to determine the coordinates of a light spot in tracking mode with error not greater than 1 μM (10~(-4) of the device's field of view) with resolution 0.2 μm under the conditions of background noise that is 10~4 times the strength of the useful signal.