| Name: Archita Rai |
| Affiliation: Korea Astronomy & Space Science Institute |
| Conference ID: ASI2026_335 |
| Title: Laboratory Implementation & Performance Characterization of MOAO system for Astronomical Applications. |
| Abstract Type: Poster |
| Abstract Category: Facilities, Technologies and Data science |
| Author(s) and Co-Author(s) with Affiliation: Archita Rai(Korea Astronomy & Space Science Institute, Daejeon - 34055, South Korea), Kyohoon Ahn(Korea Astronomy & Space Science Institute, Daejeon - 34055, South Korea), Jae Joon Lee(Korea Astronomy & Space Science Institute, Daejeon - 34055, South Korea) |
| Abstract: Adaptive optics (AO) is integral to the astronomical instrumentation landscape for all the leading large optical/IR telescope observatories. AO systems have been utilized to improve the astronomical seeing experienced by ground-based telescopes. The system compensates for the wavefront distortions in astronomical images due to the Earth’s atmospheric turbulence. Among the various AO approaches, multi-object adaptive optics (MOAO) is particularly suited for applications requiring simultaneous data collection from multiple targets, such as multi-object spectroscopy (MOS). Unlike classical AO, the objective here is not to achieve uniform correction across the entire FoV, but rather to deliver reasonably high Strehl ratios in specific regions of interest. To this end, MOAO architectures utilize multiple open-loop deformable mirrors, correcting specific FoV, aligned with a distinct science direction. We use the spatial light modulator (SLM) to simulate re-configurable atmospheric turbulence under different conditions, such as wind speed, seeing, altitude, etc. In our implementation, we employ both open-loop and closed-loop control configurations. Wavefront sensing is achieved using a Shack–Hartmann wavefront sensor (SH-WFS), which captures local wavefront slope variations via a lenslet array that samples the pupil into discrete sub-apertures. We implemented the Catkit2 framework, providing the infrastructure to control and synchronize hardware using the shared memory feature in real-time for efficient inter-process communication. In this presentation, we dicuss the detailed aspects and results of the MOAO systems via the implementation of one arm of the MOAO system. |
