The distortion of the windows of spatial filters under the vacuum condition and the atmospheric state has been measured by using lateral transverse shearing interf erometry and holographic interferometry. The distortion in the central area of the vacuum spatial filter is less than 0.1, and that periphery is about 0.41. And the intensity distribution of the laser beam in focal volume is given by means of holographic reconstructing image and numerical processing methods. The nonlinear effect for high power laser beams is also computed.