Abstract
A few years ago, we started upgrading AO188 into AO3k, including the real-time control system, laser guide star system, deformable mirror (DM), and wavefront sensors (WFSs). In this paper, we present the development of a non-linear curvature WFS (nlCWFS) as a new visible WFS for the upgraded AO3k system. We also introduce the optical and optomechanical design of the nlCWFS. The nlCWFS has two new features: one is the dual-stroke linear mode, and the other one is to deploy non-linear wavefront reconstruction. The dual-stroke linear mode provides a good sensitivity for both low- and high-order aberrations. Also, the non-linear wavefront reconstruction provides a large dynamic range. By combining the linear and non-linear methods, the nlCWFS takes both advantages. Finally, we present laboratory demonstration results of closed-loop experiments in the lab with linear and non-linear wavefront reconstruction algorithms.
| Original language | English (US) |
|---|---|
| State | Published - 2023 |
| Event | 7th Adaptive Optics for Extremely Large Telescopes Conference, AO4ELT7 2023 - Avignon, France Duration: Jun 25 2023 → Jun 30 2023 |
Conference
| Conference | 7th Adaptive Optics for Extremely Large Telescopes Conference, AO4ELT7 2023 |
|---|---|
| Country/Territory | France |
| City | Avignon |
| Period | 6/25/23 → 6/30/23 |
Keywords
- Adaptive optics
- phase diversity
- wavefront reconstruction
- wavefront sensing
ASJC Scopus subject areas
- Space and Planetary Science
- Control and Systems Engineering
- Mechanical Engineering
- Electronic, Optical and Magnetic Materials
- Astronomy and Astrophysics
- Instrumentation