Laser spot location in imaging laser detecting systems

Laser spot detection is the key technique in the imaging laser detecting system.In order to find the pinpoint direction of the laser source and locate the accurate laser spot position,the arithmetic of sub pixel measurement was put forward.For different laser spots,it was studied with the method of gravity model and the method based on spatial moments both in the theory and experiment.The statistic data of the mean value and root-mean-square of the spots' coordinates at different laser intensity approved that this idea can increase the detecting precision to less than 0.2 pixels while extending the detecting dynamic extension,which is helpful to assure the laser location precisely.