Improvement method of laser pointing accuracy for the tracking and lasing system by backward scattering

In order to correct laser beam pointing error for the high accuracy tracking and lasing system, a laser beam tip measurement method of laser backward scattering was developed. Firstly, the opto-mechanical structure and the backward scattering theory were introduced, and the relationship between detect distance of laser beam tip and binocular parallax was analysed. Secondly, based on the long time observation, the detect distances of laser beam tip in good weather condition, medium weather condition and bad weather condition were obtained respectively. Finally, the validating experiment of laser beam tip measurement method by targeting method in predetermined orbit was carried out in good weather condition. The difference of two methods was 2.5, which indicates that laser beam pointing accuracy could be improved greatly by the laser beam tip measurement method.