Book ChapterDOI
Real-Time Wavefront Sensing and Adaptive Optics
Fritz Merkle
- pp 237-248
TLDR
The principles of real time wavefront sensing and adaptive optics are described and the performance and requirements for applications of these technologies in astronomy are discussed.Abstract:
Adaptive optical systems and their applications in astronomy have been discussed for over a decade. Meanwhile the main components for such systems, like deformable mirrors, wavefront sensors, dedicated computers, etc. are commercially available. This paper describes the principles of real time wavefront sensing and adaptive optics. The performance and requirements for applications of these technologies in astronomy are discussed. Guidelines for the implementation in especially very large telescopes are given.read more
Citations
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Instrumentation for ground-based optical astronomy : present and future : the Ninth Santa Cruz Summer Workshop in Astronomy and Astrophysics, July 13-July 24, 1987, Lick Observatory
TL;DR: In astronomy, the tools are telescopes and the optical and electronic instruments that support them as mentioned in this paper, and the discovery of tools, or evidence that tools have been used, has been taken as proof of human activity; certainly the invention and spread of new tools has been a critical marker of human progress.
Journal Article
Radial grating lateral shear heterodyne interferometer (A)
TL;DR: In this paper, a variable lateral shear heterodyne interferometer has been developed that is capable of measuring the high-bandwidth wave fronts in adaptive optical systems, which is used with a radial Ronchi grating and operates with a variety of spatially and temporally coherent light sources.
Journal ArticleDOI
Optimization of electrode geometry and piezoelectric layer thickness of a deformable mirror
Alexey V. Kruchenko,Alexey V. Kruchenko,Kateřina Nováková,Kateřina Nováková,Pavel Mokrý,Pavel Mokrý +5 more
TL;DR: In this paper, the authors present an optimization of several geometric parameters of a deformable mirror that consists of a nickel reflective layer deposited on top of a thin lead zirconate titanate (PZT) piezoelectric disk.
Proceedings ArticleDOI
Comparison of the angular resolution limit and SNR of the Hubble Space Telescope and the large ground-based telescopes
TL;DR: In this paper, the authors compare and discuss the attempts to overcome the "seeing" resolution limit imposed by spherical aberration for the Hubble Space Telescope and by Atmospheric turbulences f the case of ground-based telescopes.
References
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Journal ArticleDOI
The possibility of compensating astronomical seeing
TL;DR: In this article, the effect of a number of turbulent elements leads to an unsteady enlargement of the image, perhaps with some irregular shifting in position, and the seriousness of this is evident when one realizes that ideally the 200-inch Hale telescope is capable of giving diffraction images of stars about %0 oi a second of arc in diameter, yet the size of the "seeing image" produced is in the range j4 second to perhaps 5 or 10 seconds, being about 2 seconds in diameter on the average.
Book
Applied Optics and Optical Engineering
TL;DR: Basic wavefront aberration theory for optical metrology, Wyant and Creath fast Fourier transforms and their applications, Hayes optical modelling, Lawrence catalogue of spot diagrams, and Vukobratovich the principles and applications of waveguard gratings.
Journal ArticleDOI
Active optics: A new technology for the control of light
TL;DR: Active optical systems as mentioned in this paper are those in which real-time control over optical wavefronts is employed to optimize system perference in the presence of random distrurbances, such as interference.
Journal ArticleDOI
Use of an ac heterodyne lateral shear interferometer with real-time wavefront correction systems.
TL;DR: An analysis shows that for uniform circular or square sources larger than a derived minimum size, the wavefront measurement accuracy depends only upon the radiance of the source and not upon the angular subtense of the sources.
Journal ArticleDOI
Experiments on laser guide stars at Mauna Kea Observatory for adaptive imaging in astronomy
TL;DR: In this article, Foy and Labeyrie used a laser to generate an artificial guide star in the mesospheric sodium layer to compensate for the turbulence of ground-based astronomical telescopes.