Shear interferometer in an adaptive system with optical feedback

摘要

An adaptive optical system for the correction of small-scale phase perturbations was studied, which has a liquid-crystal phase modulator and an optical feedback loop. A new method of phase visualisation with the aid of a wedge-shaped shear interferometer with a holographic filter was used. The stability of the system and the conditions of correction of phase distortions were analytically studied. In the experiments, the sup- pression of small-scale phase distortions was observed.