With the development of laser technology, higher requirement is presented on measurement technology of laser beam. The measurement technology of laser beam develops from the original Knife-edge method, Slit scanning method into the latter Shack-Hartmann method. The test index of laser beam also develops from originally testing power, wavelength into putting much value on the testing of wavefront, and characteristic value of a laser beam. In this paper, we go deep into study the method of measurement of laser beam and present a laser beam measurement method which is takes photos on focal plane to calculate the wavefront and the laser characterization. The difference between Shack-Hartmann method and this method is analyzed. The results of experiment show that, this method is simple apparatus, and high precision, and it will be a development tendency on the laser beam measurement field, in the future.
In this paper includes the superiority of analyzing of laser beam based on wavefront sensing in focal plane. It is introduced that two mainly basic principles of the technology of wavefront sensing. The correctness of this method is shown by the results of experiment. And the arrangement of experiment is simple. Experiment error is reduced easily. Application prospects and feasibility are proved sufficiently.