An uncooled, 293 actuator deformable mirror design has been developed and two mirrors have been produced. This design is designated the High Performance Active Corrective Element (HiPACE) 293. The HiPACE 293 will provide substantial wavefront correction for large, multi-meter telescopes operating at science wavelengths of >= 2 micrometers while providing correction at shorter wavelengths for facilities with more moderate apertures.
Robert L. Lillard,
John D. Schell,
"High-performance deformable mirror for wavefront compensation", Proc. SPIE 2201, Adaptive Optics in Astronomy, (31 May 1994); doi: 10.1117/12.176035; https://doi.org/10.1117/12.176035