title: Characterization and control of a multielement dual-frequency liquid-crystal device for high-speed adaptive optical wave-front correction.
abstract: Multielement nematic liquid-crystal devices have been used by others and ourselves for closed-loop adaptive control of optical wave-front distortions. Until recently the phase retardance of available devices could be controlled rapidly in only one direction. The phase retardance of the dual-frequency device can be controlled rapidly in both directions. Understanding the dynamics of the phase retardance change is critical to the development of a high-speed control algorithm. We describe measurements and experiments leading to the closed-loop control of a multielement dual-frequency liquid-crystal adaptive optic.
authors: D
authors: D
authors: Dayton
authors: S
authors: S
authors: Browne
authors: J
authors: J
authors: Gonglewski
authors: S
authors: S
authors: Restaino