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pro vyhledávání: '"Townson, M J"'
AOtools is a Python package which is open-source and aimed at providing tools for adaptive optics users and researchers. We present version 1.0 which contains tools for adaptive optics processing, including analysing data in the pupil plane, images a
Externí odkaz:
http://arxiv.org/abs/1910.04414
Autor:
Farley, O. J. D., Osborn, J., Morris, T., Sarazin, M., Butterley, T., Townson, M. J., Jia, P., Wilson, R. W.
Knowledge of the optical turbulence profile is important in adaptive optics (AO) systems, particularly tomographic AO systems such as those to be employed by the next generation of 40 m class extremely large telescopes (ELTs). Site characterisation a
Externí odkaz:
http://arxiv.org/abs/1809.07551
Shack-Hartmann wavefront sensors for both solar and laser guide star adaptive optics (with elongated spots) need to observe extended objects. Correlation techniques have been successfully employed to measure the wavefront gradient in solar adaptive o
Externí odkaz:
http://arxiv.org/abs/1809.03233
Autor:
Osborn, J., Wilson, R. W., Sarazin, M., Butterley, T., Chacón, A., Derie, F., Farley, O. J. D., Haubois, X., Laidlaw, D., LeLouarn, M., Masciadri, E., Milli, J., Navarrete, J., Townson, M. J.
Publikováno v:
Published in MNRAS, 478, 1, 825-834, 2018 https://academic.oup.com/mnras/article-abstract/478/1/825/4987879
Knowledge of the Earth's atmospheric optical turbulence is critical for astronomical instrumentation. Not only does it enable performance verification and optimisation of existing systems but it is required for the design of future instruments. As a
Externí odkaz:
http://arxiv.org/abs/1806.02585
Autor:
Anagnos, Th., Harris, R. J., Corrigan, M. K., Reeves, A. P., Townson, M. J., MacLachlan, D. G., Thomson, R. R., Morris, T. J., Schwab, C., Quirrenbach, A.
Image slicing is a powerful technique in astronomy. It allows the instrument designer to reduce the slit width of the spectrograph, increasing spectral resolving power whilst retaining throughput. Conventionally this is done using bulk optics, such a
Externí odkaz:
http://arxiv.org/abs/1805.00665
Autor:
Basden, A. G., Bardou, L., Calia, D. Bonaccini, Buey, T., Centrone, M., Chemla, F., Gach, J. L., Gendron, E., Gratadour, D., Guidolin, I., Jenkins, D. R., Marchetti, E., Morris, T. J., Myers, R. M., Osborn, J., Reeves, A. P., Reyes, M., Rousset, G., Lombardi, G., Townson, M. J., Vidal, F.
The performance of adaptive optics systems is partially dependant on the algorithms used within the real-time control system to compute wavefront slope measurements. We demonstrate use of a matched filter algorithm for the processing of elongated las
Externí odkaz:
http://arxiv.org/abs/1702.03736
Publikováno v:
MNRAS 464, 3998-4007, 2017
As telescopes become larger, into the era of ~40 m Extremely Large Telescopes, the high- resolution vertical profile of the optical turbulence strength is critical for the validation, optimization and operation of optical systems. The velocity of atm
Externí odkaz:
http://arxiv.org/abs/1701.02624
An important factor which affects performance of solar adaptive optics (AO) systems is the accuracy of tracking an extended object in the wavefront sensor. The accuracy of a centre-ofmass approach to image shift measurement depends on the parameters
Externí odkaz:
http://arxiv.org/abs/1508.05011
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