KnowraActive opticsLinked fromLinked fromThe 4 pages that link to Active optics, each with the reason it gives.All 4Related 3Compared with 1Adaptive opticsCompared with: Unlike adaptive optics, it corrects gradual telescope changes rather than rapid atmospheric turbulence.Primary mirrorRelated: Actuators reshape or reposition the primary mirror to preserve its intended figure.Subaru TelescopeRelated: Active control keeps Subaru’s large, thin primary mirror in its intended shape.Giant Magellan TelescopeRelated: Active control keeps the large primary mirror segments aligned as the telescope moves.