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8 May 1995 Stability of measured influence functions in a large active optical system
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The influence function of an active optical system defines the relationship between commands to deformable mirror actuators and the changes in wavefront error that result from those commands. Accurate knowledge of the influence function is critical for stable closed-loop operation of the system. A recent program at Itek Optical Systems used a 2.6-meter-diameter, ULE deformable mirror with 144 lead-magnesium-niobate electrostrictive actuators. The influence functions of this mirror were measured under operational conditions over a period of fourteen months and no significant changes in the influence functions were found over that time. This is a very encouraging result for future applications of active optical systems where stable, closed-loop operation is required for many months between remeasurement of influence functions.
© (1995) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Charles D. Cox, Mark E. Furber, William H. Corrigan, and David Blaszak "Stability of measured influence functions in a large active optical system", Proc. SPIE 2443, Smart Structures and Materials 1995: Smart Structures and Integrated Systems, (8 May 1995);


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