The Adaptive Optics Project For The GI2T Interferometer

摘要

The GI2T/REGAIN is a multi-speckle Michelson stellar interferometer of two 1.5m telescopes operating in the visible and near infrared wavelenghts. We are developing low cost adaptive optics using a curvature wavefront sensor and a 31 actuator bimorph mirror. Our curvature sensor uses an array of prisms instead of micro-lenses and optical fibers. We have also done and are still working on a new visibility estimator for the partially corrected image. The future perfomance will give us a gain of two or three magnitudes and an important gain of the signal to noise ratio on the visibility measurement.