Research of Facular Energy Distribution for Pulsed Laser Tracking System

Due to the distortion is always accorded when the laser facular reaches the four-quadrant detection photosensitive surface of the pulsed laser tracking system, resulting in the decline of the target measuring accuracy. Therefore the effect of facular size and energy distribution for the target azimuth measurement accuracy is researched. The calculation method for laser pot offset is discussed, and the formulas and principle circuit are given. The effect analysis of the laser pot size for measuring linear region and sensitivity are carried out, when the laser spot shows a uniform distribution as well as the Gaussian distribution. The performance of the laser pots under the two energy distribution situations are compared, the corresponding simulation curves are obtained. The simulation results show that the linear region of the Gaussian spot is larger than the uniform spot, but its sensitivity is relatively lower than the uniform spot within the effective dynamic range.