Registration technique for detection of optical signal position under intense background illumination

The paper demonstrates that the concept of a movable current-voltage characteristic being combined with the proposed double-aperture in PSDs provides a significant decrease of the influence of intense background illumination on the determination accuracy of the median position of a weak modulated signal and at the same time secures the sensor resolution regardless of its linear dimensions. The developed technique guarantees the necessary agreement between the reduction of the negative impact of background illumination and the sensor operating speed.