We have developed, manufactured and tested a unimorph deformable mirror for space applications based on
piezoelectric actuation. The mirror was designed for the correction of low-order Zernike modes with a stroke of several
tens of micrometers over a clear aperture of 50 mm. It was successfully tested in thermal vacuum, underwent lifetime
tests, and was exposed to random vibrations, sinusoidal vibrations, and to ionizing radiation. We report on design
considerations, manufacturing of the mirror, and present the test results. Furthermore, we discuss critical design
parameters, and how our mirror could be adapted to serve recently proposed space telescopes such as HDST and TALC.