High-Fill-Factor Adaptive Optics Mirrors With Independent Piston, Tip, and Tilt Controls

This paper proposes a new CCIT mirror design that utilizes shuttle-rocker-arm actuators to raise the effective pivot point of each mirror element to the midpoint of the element's top surface. This permits a 98% fill factor. The piston, tip, and tilt degrees of freedom are independent and each can be operated separately using a single actuator.