Linked from

The 4 pages that link to Active optics, each with the reason it gives.

• 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.