@inproceedings{0f65284906244c82868b8405a1f771cc,
title = "Design of a truth sensor for the GMT laser tomography adaptive optics system",
abstract = "The GMT laser tomography adaptive optics (LTAO) system design has a truth sensor guiding on a natural guide star. The truth sensor is used to measure telescope segment piston errors and measure slowly varying non-common path aberrations. The challenge lies in measuring segment piston using faint natural guide stars and the wavefront delivered by the LTAO system. This requires a sensor that can make a direct phase measurement. It is demonstrated that an infrared, AO-corrected, unmodulated pyramid or roof wavefront sensor can make the required measurements at 10 Hz for stars brighter than magnitude 17 at H- or K-band.",
keywords = "Adaptive optics, Giant Magellan Telescope, Pyramid wavefront sensor, Segment piston, Simulations, Wavefront sensing",
author = "{Van Dam}, {Marcos A.} and Rodolphe Conan and Bouchez, {Antonin H.} and Brady Espeland",
year = "2012",
doi = "10.1117/12.923198",
language = "English",
isbn = "9780819491480",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
booktitle = "Adaptive Optics Systems III",
note = "Adaptive Optics Systems III ; Conference date: 01-07-2012 Through 06-07-2012",
}