High resolution wavefront sensing with non-interferometric techniques

For the measurement of wave fronts there are is a variety of methods, which can be coarsely divided into interferometric and non-interferometric techniques. Each of these methods has its advantages and disadvantages. Here we combine the Hartmann-Shack (HS) method with the multi-plane phase retrieval method by Pedrini, thus obtaining a robust technique for measuring amplitde and phase with much higher spatial resolution than the classical HS-method.