Physics – Optics
Scientific paper
Jun 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978ieeep..66..651h&link_type=abstract
IEEE, Proceedings, vol. 66, June 1978, p. 651-697.
Physics
Optics
80
Adaptive Optics, Imaging Techniques, Light Modulation, Optical Correction Procedure, Wave Fronts, Aberration, Atmospheric Turbulence, Feedback Control, Optical Measuring Instruments, Optimal Control, Radiant Flux Density, Real Time Operation, Systems Engineering, Technology Utilization
Scientific paper
Active optics is a general term for optical components whose characteristics are controlled during actual operation in order to modify optical wave fronts. In this paper, the basic concepts of active-optics technology and systems are reviewed along with their historical evolution from early figure-control systems to the recently developed high-bandwidth systems for atmospheric compensation with bandwidths of several hundred hertz. The discussion focuses on coherent (laser) and incoherent (white-light) wavefront sensing techniques, wavefront correction devices, major considerations in system design, and current applications relating to outgoing-wave systems for maximizing the power density of a laser beam on a target and to received-wave systems for maximizing the angular resolving power of a telescope viewing a distant object through a turbulent atmosphere. Two models are used for performance analysis and optimization of closed-loop systems. Some speculation is made on future developments of active optics.
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