Active optics experiment is carried out with a 400mm diameter
12mm thickness spherical mirror
the mirror surface was corrected by the 12 axial active support. In the experiment
the mirror surface was tested by interferometer
and the damp least square method is used to determine the active corrective force. The initial surface error is 1.22 wavelength RMS
after correction
the surface error is 0.12wavelength RMS,near the error after the mirror polishing 0.1wavelength RMS. The experiment shows the active correct procedure is correct and feasible.