Ultra high-resolution wave front sensing

Our group has shown that by using a modified multi-aperture phase retrieval (MAPR) algorithm to process the data from an imaging Shack-Hartmann sensor, we are able to better estimate the high-spatial frequencies of the atmospheric wave front than we are with a traditional Shack Hartmann wave front sensor. We have demonstrated that using a MAPR wave front sensor as a part of an aperture-diverse imaging system, allows us to increase our spatial-temporal coverage of the skies above the Air Force’s large aperture telescopes by an order of magnitude over current capability.

Wave front reconstruction using Imaging Shack-Hartmann Wave Front Sensor and multi-aperture phase retrieval. Truth phase (left) and reconstructed phase (right) from simulated measurements through atmospheric turbulence with D/r0~25.