| Popis: |
Some results concerning the correction loop of an Adaptive Optics (AO) system for the eye are presented. This is part of a project aiming to study the effects of AO on visual performance, using psychophysical methods. The AO system used in the project is presented. It comprises a Shack-Hartmann sensor, which measures the light deformation after a double-pass in the eye, and two corrective blocks. A Badal optometer coupled with cylindrical lenses is used to remove the main refractive aberrations, while a deformable mirror deals with the remaining aberrations. This system can enable one to carry out psychophysical experiments as a stimulus is viewed by the subject through the same optics. A bimorph mirror has been tested in view of correcting ocular simulations, and recently implemented in the system. The experimental results, consistent with the simulations, yield to a residual root-mean-square wavefront deviation of about 0.06 microns over a 4.8 mm pupil, corresponding to a Strehl ratio of approximately 0.6. |
