The Study on the Method of Eliminating Errors of PSD

PSD is a unique kind of semiconductor photoelectric position sensors. In this article, the principle of PSD is introduced, and the relationship between coordinates position of the dot of laser beam and conversion formula is derived theoretically. This article analyses the influence to PSD of external environment such as background light, reverse biased voltage and temperature, and the testing error of the non-linearity of PSD. At the end, the method of eliminating the testing error was put foreword.