Eigenmode Wavefront Decoupling Algorithm for LC–DM Adaptive Optics Systems
To realize the decoupling control of the dual corrector of liquid crystal (LC)–deformable mirror (DM) adaptive optics (AO) systems and prevent the loss of correction ability induced by coupling aberrations, a wavefront decoupling method based on DM eigenmodes was proposed. The coupling relationship...
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| Format: | Article |
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MDPI AG
2022-08-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/12/15/7875 |
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| author | Yukun Wang Dayu Li Chengbin Jin |
| author_facet | Yukun Wang Dayu Li Chengbin Jin |
| author_sort | Yukun Wang |
| collection | DOAJ |
| description | To realize the decoupling control of the dual corrector of liquid crystal (LC)–deformable mirror (DM) adaptive optics (AO) systems and prevent the loss of correction ability induced by coupling aberrations, a wavefront decoupling method based on DM eigenmodes was proposed. The coupling relationship of two correctors was studied, and the distribution of aberrations corrected using the DM and LC was investigated. First, a DM eigenmode matrix was derived according to the DM influence function. Then, aberrations were decomposed according to the Strehl ratio, and the projection of the LC response matrix on the DM eigenmode matrix, that is, the coupling term, was derived. Before using the LC corrector, the coupling item was eliminated for the decoupling of the two correctors, and the decoupling effect was verified through simulations. Finally, a 2 m telescope LC–DM AO system was developed to validate the proposed method. The simulation and experimental results showed that the root mean square of the DM-corrected residual after 55 eigenmodes’ correction was 0.09 μm. After decoupling correction, the resolution of the 700–1700 nm wide band improved from 1.1 to 1 times the diffraction limit, which is 1.2 times better than that obtained using the traditional Zernike mode correction. |
| first_indexed | 2024-03-09T05:34:16Z |
| format | Article |
| id | doaj.art-3b72490ff49542a38d3ffa3b6f359405 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-09T05:34:16Z |
| publishDate | 2022-08-01 |
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| spelling | doaj.art-3b72490ff49542a38d3ffa3b6f3594052023-12-03T12:29:59ZengMDPI AGApplied Sciences2076-34172022-08-011215787510.3390/app12157875Eigenmode Wavefront Decoupling Algorithm for LC–DM Adaptive Optics SystemsYukun Wang0Dayu Li1Chengbin Jin2State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, ChinaState Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, ChinaState Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, ChinaTo realize the decoupling control of the dual corrector of liquid crystal (LC)–deformable mirror (DM) adaptive optics (AO) systems and prevent the loss of correction ability induced by coupling aberrations, a wavefront decoupling method based on DM eigenmodes was proposed. The coupling relationship of two correctors was studied, and the distribution of aberrations corrected using the DM and LC was investigated. First, a DM eigenmode matrix was derived according to the DM influence function. Then, aberrations were decomposed according to the Strehl ratio, and the projection of the LC response matrix on the DM eigenmode matrix, that is, the coupling term, was derived. Before using the LC corrector, the coupling item was eliminated for the decoupling of the two correctors, and the decoupling effect was verified through simulations. Finally, a 2 m telescope LC–DM AO system was developed to validate the proposed method. The simulation and experimental results showed that the root mean square of the DM-corrected residual after 55 eigenmodes’ correction was 0.09 μm. After decoupling correction, the resolution of the 700–1700 nm wide band improved from 1.1 to 1 times the diffraction limit, which is 1.2 times better than that obtained using the traditional Zernike mode correction.https://www.mdpi.com/2076-3417/12/15/7875adaptive opticseigenmodeswavefront decoupling |
| spellingShingle | Yukun Wang Dayu Li Chengbin Jin Eigenmode Wavefront Decoupling Algorithm for LC–DM Adaptive Optics Systems Applied Sciences adaptive optics eigenmodes wavefront decoupling |
| title | Eigenmode Wavefront Decoupling Algorithm for LC–DM Adaptive Optics Systems |
| title_full | Eigenmode Wavefront Decoupling Algorithm for LC–DM Adaptive Optics Systems |
| title_fullStr | Eigenmode Wavefront Decoupling Algorithm for LC–DM Adaptive Optics Systems |
| title_full_unstemmed | Eigenmode Wavefront Decoupling Algorithm for LC–DM Adaptive Optics Systems |
| title_short | Eigenmode Wavefront Decoupling Algorithm for LC–DM Adaptive Optics Systems |
| title_sort | eigenmode wavefront decoupling algorithm for lc dm adaptive optics systems |
| topic | adaptive optics eigenmodes wavefront decoupling |
| url | https://www.mdpi.com/2076-3417/12/15/7875 |
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