13 September 2012 Pupil rotation compensation for LINC-NIRVANA
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Proceedings Volume 8447, Adaptive Optics Systems III; 84472U (2012); doi: 10.1117/12.927121
Event: SPIE Astronomical Telescopes + Instrumentation, 2012, Amsterdam, Netherlands
Abstract
The interferometric imager LINC-NIRVANA will use pyramid wavefront-sensors for multi-conjugated adaptive optics (MCAO). A derotator will produce a static field on the pyramids, but a rotating pupil image on the CCD. For long exposure times, we have to take into account this effect to command the deformable mirror properly by changing the command matrix on the fly. We reproduce in a laboratory set-up this configuration to test different methods for compensating for this effect. We present the results obtained and the optimal solution we have selected.
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Matthieu Brangier, Albert R. Conrad, Thomas Bertram, Xianyu Zhang, Juergen Berwein, Florian Briegel, Thomas M. Herbst, Roberto Ragazzoni, "Pupil rotation compensation for LINC-NIRVANA", Proc. SPIE 8447, Adaptive Optics Systems III, 84472U (13 September 2012); doi: 10.1117/12.927121; https://doi.org/10.1117/12.927121
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KEYWORDS
Adaptive optics

Sensors

Control systems

Deformable mirrors

Wavefront sensors

CCD image sensors

Charge-coupled devices

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