A method for measuring the radiation wave front by using a three-wave lateral shearing interferometer

Interaction of attosecond and femtosecond pulses with atoms and molecules

“…This optical method reconstructs the spatial wavefront of the laser beam by a simple interferometry scheme [130]. In this method two copies is created and then the spatial shearing are introduced in the two perpendicular directions [132,133,134]. From the resulting two interferograms the two partial derivatives along the perpendicular directions, i.e., ∂φ ∂x and ∂φ ∂y , are recovered.…”