Linear phase retrieval for real-time adaptive optics

Phase Retrieval for Adaptive Optics System Calibration

Durham adaptive optics real-time controller.

The Durham adaptive optics (AO) real-time controller was initially a proof of concept design for a generic AO control system. It has since been developed into a modern and powerful central-processing-unit-based real-time control system, capable of using hardware acceleration (including field programmable gate arrays and graphical processing units), based primarily around commercial off-the-shel...

Phase Conjugate Optics and Real-Time Holography

Nonlinear optical mixing can be used to perform a variety of new optical functions, as well as real-time holography. The theory and some of the first experiments are described.

Real-time control for Keck Observatory next-generation adaptive optics

The next generation adaptive optics systems for large telescopes will be complex systems far larger, more complex, and with higher performance than any currently installed. This requires adopting new algorithms, technologies, and architectures. The Keck next generation adaptive optics (NGAO) system requires real-time wavefront reconstruction and tomography given input from 7 laser and 3 natural...

Real-time modal control implementation for adaptive optics.

The electronics, computing hardware, and computing used to provide real-time modal control for a laser guide-star adaptive optics system are presented. This approach offers advantages in the control of unobserved modes, the elimination of unwanted modes (e.g., tip and tilt), and automatic handling of the case of low-resolution lens arrays. In our two-step modal implementation, the input vector ...