2ISO/TC 172/SC 9/WG 1N80,ISO/DIS 11146.Test methods for laser beam parameters:Beam width,divergence angle and beam propagation factor[S].1999.
3Roundy C B.Techniques for accurately measuring laser beam width with commercial CCD cameras[C].5th International Workshop on Laser Beam and Optics Characterization,Germany:Munich,1997.422-445.
