Adaptive Optics Design for the Advanced Electro-Optical System (AEOS).
Abstract
We develop an algorithm to guide the use of computer simulations in the design of application-specific adaptive optics (AO) systems. We then use this method to specify the number of deformable-mirror actuators and closed-loop bandwidth for the Advanced Electro-Optical System (AEOS) telescope AO system. To develop the algorithm we present analysis to show the normalized on-axis intensity can be minimized for a given AO configuration by selecting an optimum imaging wavelength. This wavelength minimizes the combined effects of diffraction, which increases with wavelength, and residual (post-compensation) phase aberration, which decreases as wavelength increases. We also show that the closed-loop AO bandwidth minimizing the sum of wavefront sensor noise error and control loop lag error is independent of wavelength. This allows the optimum bandwidth-wavelength combination for any AO configuration to be calculated non-iteratively in two steps. We describe a high-fidelity computer simulation and measures of merit used to select from among four candidate configurations. Finally, we present simulation results used to select the AEOS adaptive optics configuration and recommend the AEOS system use approximately 700 actuators with a maximum closed-loop bandwidth of at least 400 Hz. (MM)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1994
- Accession Number
- ADA293972
Entities
People
- Amy E. Prochko
- David W. Tyler