ABSTRACT
An adaptive-optics system for real-time phase conjugation can be characterized as a highly parallel servo device capable of sensing and correcting the incoming wavefront at the pupil plane of an imaging sensor. Performance close to the diffraction limit of the input aperture can be achieved in the limit that the angular separation between the turbulence probe and the target object is small (<θ0), the spacing between control elements on the active optical element is well matched to the turbulence coherence length (<r 0), and a sufficiently high update rate is maintained (>1/τ0). However in most practical implementations of this concept, performance compromises are necessary to reduce component costs and improve the sensitivity of the wavefront sensor.
