(Purpose)In order to reduce the nonlinear effects in optical fiber effectively and make the energy output of the light beam much more uniformly,a flat-top b
Infrared character of aircraft is one important factor to estimate the ability of breaching the defense of enemy,this paper firstly analyzed the method of i
Digital holography(DH)is a 3D imaging technique with a theoretical axial accuracy of better than 1-2 nanometers.However,practically,the axial error has been