  We investigate the aspherization of an active mirror for correcting third and
fifth-order aberrations. We use a stainless steel AISI 420 mirror with a
controlled pressure load, two series of 12-punctual radial positions of force
application distributed symmetrically in two concentric rings around the
mirror. We obtain the wavefronts for Cv1, Sph3, Coma3, Astm3, Comatri, Astm5
aswell as those of the added wavefronts. Although this active prototype mirror
has general uses, our goal is to compensate the aberrations of a liquid mirror
observing at large angles from the zenith.
