A system for wavefront aberration reduction of an incident optical beam. The system includes a spatial light modulator (1) for receivingthe incident optical beam (4) and forming an output optical beam (5), the output beam (5) being aberration-reduced compared to the incident beam (4); a common-path interferometer for receiving a portion of the output optical beam (5) and for generating an interference fringe pattern by introducing a phase shift to one part of said portion of the output optical beam, the interference fringe pattern being applied to said spatial light modulator and comprising essentially all of the light available in said portion of the output optical beam (5); wherein the interference fringe pattern is representative of the wavefront error of the incident optical beam and theinterference fringe pattern activates said spatial light modulator (1) such that said spatial light modulator performs wavefront errorcorrection on the output optical beam.
ADAPTIVE OPTICAL SYSTEM WITH SELF-REFERENCING CONTRAST CONTROL