The paraxial optics of elastic circular plates with clamped or free boundaries, subject either to continuous uniform load, or to a uniformly distributed momentum, is presented. In this way, continuously variable convex to concave mirrors can be obtained. Fused silica and glass plates were considered, and dimensional design formulae are given.
"Adaptive mirrors for power-laser cavities", Proc. SPIE 2461, ROMOPTO '94: Fourth Conference in Optics, (8 March 1995); doi: 10.1117/12.203514; https://doi.org/10.1117/12.203514