1 Wave front corrector systems, other than mirrors specified in Dual-Use code 6A004.a., 6A005.e. or 6A005.f., for use with a laser beam having a diameter exceeding 4 mm, and specially designed components thereof, including control systems, phase front sensors and deformable mirrors including bimorph mirrors. 2 In this paragraph, “ deformable mirrors ” has the meaning given to it in the Dual-Use Regulation.