Temporal variability in magnetically actuated deformable mirror surface figure measured via interferometry

Meghdoot Biswas; Hyukmo Kang; Ewan Douglas; Daewook Kim

doi:10.1117/12.3028231

30 September 2024 Temporal variability in magnetically actuated deformable mirror surface figure measured via interferometry

Meghdoot Biswas, Hyukmo Kang, Ewan Douglas, Daewook Kim

Author Affiliations +

Proceedings Volume 13134, Optical Manufacturing and Testing 2024; 1313409 (2024) https://doi.org/10.1117/12.3028231
Event: Optical Engineering + Applications, 2024, San Diego, California, United States

Abstract

Precise characterization of deformable mirrors (DMs) is crucial for optimizing wavefront sensing and control systems. This study employs a 4D PhaseCam 6000 interferometer to investigate the temporal behavior of a 97-actuator ALPAO DM across varying levels of aberration. Analysis of root mean square (RMS) differences and changes in the first 37 Zernike polynomials demonstrates a clear correlation between applied aberrations and temporal variability. We observe a consistent pattern: as the applied magnitude of the RMS to the DM increases, so does the disparity between maximum and minimum RMS values across all configurations, with exceptions noted in cases involving coma and scenarios without applied aberrations (DM powered on and DM powered off). Notably, in 11 out of 14 measurements, either oblique astigmatism or vertical astigmatism exhibits the highest variability, often appearing together, underscoring their collective impact on DM performance over time.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Meghdoot Biswas, Hyukmo Kang, Ewan Douglas, and Daewook Kim "Temporal variability in magnetically actuated deformable mirror surface figure measured via interferometry", Proc. SPIE 13134, Optical Manufacturing and Testing 2024, 1313409 (30 September 2024); https://doi.org/10.1117/12.3028231

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