System for focus detection utilizing a photoelectric sensor array

摘要

A light measuring device capable of amplifying the difference of the time-sequential pulse output signals from the photoelectric sensor array regardless of the magnitude of said pulse output signals, comprises optical system means; means comprising a photoelectric sensor array having a plurality of photoelectric sensors for receiving the light passing through said optical system means and generating electric signals respectively corresponding to the intensity of light received by said photoelectric sensors as time-sequential signals of a determined interval; means for generating a comparison signal of a determined magnitude related to the output level of said electric signals; and processing means adapted to receive said electric signals and said comparison signal to generate output signals related to the difference of said signals in a sequential manner.