Stray Noises and Illuminations Disturbing the Performance of Position-Sensitive Devices

摘要

In the industrial environment of position-sensitive detectors' usage, the laser source used for position measurement is co-existing with different kinds of light sources along with their reflections and back-scatters from various surfaces. These randomly arising illumination noises may fall on the detector surface in different geometrical orientations and produce different unwanted effects. In this paper, we attempt to describe, model and analyze these stray noises with respect to the operation of PSDs. We also study how the presence of the spurious sources modifies the behaviour of these detectors. The experimental results obtained by using PSDs and signal beams along with the spurious sources are presented. The experimental data are compared with the results from the proposed mathematical model graphically.