New far-field detection technique for beam alignment system in high power laser facility;

A formula for the distribution of the collimated beam s spatial frequency is established and the spatial frequency distribution of the incident light is obtained.

The methods for measuring lens focal length and spherical curvature radius at presentare summarized, and the principle of the collimated beam compensation method for measuring lens focal length and spherical curvature radius is introduced and it is indicated that the key of this metbod ischeck on the collimation of compensation beam.

In this thesis, the technology of high precision laser beam collimation, which is one of the key techniques in space optical communication, has been deeply researched and the collimation optical system has been designed.