| DOI | Resolve DOI: https://doi.org/10.1117/12.2057092 |
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| Author | Search for: Poyneer, Lisa A.; Search for: De Rosa, Robert J.; Search for: MacIntosh, Bruce; Search for: Palmer, David W.; Search for: Perrin, Marshall D.; Search for: Sadakuni, Naru; Search for: Savransky, Dmitry; Search for: Bauman, Brian; Search for: Cardwell, Andrew; Search for: Chilcote, Jeffrey K.; Search for: Dillon, Daren; Search for: Gavel, Donald; Search for: Goodsell, Stephen J.; Search for: Hartung, Markus; Search for: Hibon, Pascale; Search for: Rantakyrö, Fredrik T.; Search for: Thomas, Sandrine; Search for: Veran, Jean-Pierre1 |
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| Name affiliation | - National Research Council Canada. National Science Infrastructure
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| Format | Text |
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| Type | Article |
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| Proceedings title | SPIE - International Society for Optical Engineering. Proceedings |
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| Conference | Adaptive Optics Systems IV, 22 June 2014 through 27 June 2014 |
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| ISSN | 0277-786X |
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| ISBN | 9780819496164 |
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| Volume | 9148 |
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| Article number | 91480K |
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| Subject | Wavefronts; Gemini Planet Imager; LQG control; Modal gain; Wave front reconstruction; Wave front sensors; Adaptive optics |
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| Abstract | The Gemini Planet Imager instrument's adaptive optics (AO) subsystem was designed specifically to facilitate high-contrast imaging. It features several new technologies, including computationally efficient wavefront reconstruction with the Fourier transform, modal gain optimization every 8 seconds, and the spatially filtered wavefront sensor. It also uses a Linear-Quadratic-Gaussian (LQG) controller (aka Kalman filter) for both pointing and focus. We present on-sky performance results from verification and commissioning runs from December 2013 through May 2014. The efficient reconstruction and modal gain optimization are working as designed. The LQG controllers effectively notch out vibrations. The spatial filter can remove aliases, but we typically use it oversized by about 60% due to stability problems. |
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| Publication date | 2014-07-21 |
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| Publisher | SPIE |
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| Language | English |
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| Peer reviewed | Yes |
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| NPARC number | 21275550 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction |
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Record identifier | aa0203ab-c691-4617-a2a8-bdecf33a231a | | Record created | 2015-07-14 |
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| Record modified | 2017-04-24 |
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