Adaptive optics capabilities at the Large Binocular Telescope Observatory
AuthorChristou, J. C.
Hill, J. M.
Miller, D. L.
Taylor, G. E.
AffiliationUniv Arizona, Steward Observ
KeywordsNatural Guide Star
Laser Guide Star
Single Conjugate Adaptive Optics
Ground Layer Adaptive Optics
Multiple Conjugate Adaptive Optics
Laser Guide Stars
MIR Extreme Adaptive Optics
MetadataShow full item record
PublisherSPIE-INT SOC OPTICAL ENGINEERING
CitationJ. C. Christou ; G. Brusa ; A. Conrad ; S. Esposito ; T. Herbst ; P. Hinz ; J. M. Hill ; D. L. Miller ; S. Rabien ; G. Rahmer ; G. E. Taylor ; C. Veillet and X. Zhang " Adaptive optics capabilities at the Large Binocular Telescope Observatory ", Proc. SPIE 9909, Adaptive Optics Systems V, 99092E (July 26, 2016); doi:10.1117/12.2231783; http://dx.doi.org/10.1117/12.2231783
JournalADAPTIVE OPTICS SYSTEMS V
Rights© 2016 SPIE
Collection InformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at firstname.lastname@example.org.
AbstractWe present an overview of the current and future adaptive optics systems at the LBTO along with the current and planned science instruments they feed. All the AO systems make use of the two 672 actuator adaptive secondary mirrors. They are (1) FLAO (NGS/SCAO) feeding the LUCI NIR imagers/spectrographs; (2) LBTI/AO (NGS/SCAO) feeding the NIR/MIR imagers and LBTI beam combiner; (3) the ARGOS LGS GLAO system feeding LUCIs; and (4) LINO-NIRVANA - an NGS/MCAO imager and interferometer system. AO performance of the current systems is presented along with proposed performances for the newer systems taking into account the future instrumentation.
VersionFinal published version
Showing items related by title, author, creator and subject.
Adaptive, Dynamic Surface / Wavefront Metrology and AnalysisKim, Dae Wook; Aftab, Maham; Smith, Gregory A.; Liang, Rongguang; Mahajan, Virendra N. (The University of Arizona., 2019)The demand for increasingly sophisticated optics continues to grow for a wide variety of applications, such as in astronomy, industrial manufacturing, medical imaging, and commercial photography. As more advanced fabrication methods are invented, especially for high-resolution or freeform designs, the tools and techniques for optical metrology and analysis must be made more precise, efficient, and robust. This study discusses various approaches for adaptive and dynamic surface or wavefront metrology and analysis which would aid in the ability to have more advanced and innovative optics. Three techniques for improving optical testing and analysis are discussed in this work. The first two are mathematical frameworks, applied in software codes that provide new and improved solutions to challenges arising during optical metrology, e.g., deflectometry measurements and data analysis. Both are based on polynomial basis sets, and are optimized for systems with rectangular apertures. The first is used for reconstructing surfaces or wavefronts from measured slope data and the second uses the measured data to obtain information about possible misalignments or systematic errors in metrology systems. The third is the development of a sensor for measuring wavefront slope data, which allows solutions for optical testing and analysis problems that occur from a limited dynamic range of measurements. The dynamic range of measurement is the range of wavefront slope values (largest and smallest values) that can be measured by a system. The aforementioned sensor uses the modal data fitting methodology described in this work. Each of these topics has been researched, their main concepts tested, and software and (where applicable) hardware solutions developed for them. Simulations and real data analysis are used for verification of these tools and techniques.
Next generation wavefront controller for the MMT adaptive optics system: Algorithms and techniques for mitigating dynamic wavefront aberrationsHart, Michael; Powell, Keith; Hinz, Phil; Tharp, Hal; Hart, Michael (The University of Arizona., 2012)Wavefront controller optimization is important in achieving the best possible image quality for adaptive optics systems on the current generation of large and very large aperture telescopes. This will become even more critical when we consider the demands of the next generation of extremely large telescopes currently under development. These telescopes will be capable of providing resolution which is significantly greater than the current generation of optical/IR telescopes. However, reaching the full resolving potential of these instruments will require a careful analysis of all disturbance sources, then optimizing the wavefront controller to provide the best possible image quality given the desired science goals and system constraints. Along with atmospheric turbulence and sensor noise, structural vibration will play an important part in determining the overall image quality obtained. The next generation of very large aperture telescopes currently being developed will require assessing the effects of structural vibration on closed loop AO system performance as an integral part of the overall system design. Telescope structural vibrations can seriously degrade image quality, resulting in actual spot full width half maximum (FWHM) and angular resolution much worse than the theoretical limit. Strehl ratio can also be significantly degraded by structural vibration as energy is dispersed over a much larger area of the detector. In addition to increasing telescope diameter to obtain higher resolution, there has also been significant interest in adaptive optics systems which observe at shorter wavelength from the near infrared to visible (VNIR) wavelengths, at or near 0.7 microns. This will require significant reduction in the overall wavefront residuals as compared with current systems, and will therefore make assessment and optimization of the wavefront controller even more critical for obtaining good AO system performance in the VNIR regime.
Control code for laboratory adaptive optics teaching systemJin, Moon-Seob; Luder, Ryan J.; Sanchez, Lucas R. W.; Hart, Michael; Univ Arizona, Coll Opt Sci, 1630 E Univ Blvd, Tucson, AZ 85721 USA (SPIE-INT SOC OPTICAL ENGINEERING, 2017)By sensing and compensating wavefront aberration, adaptive optics (AO) systems have proven themselves crucial in large astronomical telescopes, retinal imaging, and holographic coherent imaging. Commercial AO systems for laboratory use are now available in the market. One such is the ThorLabs AO kit built around a Boston Micromachines deformable mirror. However, there are limitations in applying these systems to research and pedagogical projects since the software is written with limited flexibility. In this paper, we describe a MATLAB-based software suite to interface with the ThorLabs AO kit by using the MATLAB Engine API and Visual Studio. The software is designed to offer complete access to the wavefront sensor data, through the various levels of processing, to the command signals to the deformable mirror and fast steering mirror. In this way, through a MATLAB GUI, an operator can experiment with every aspect of the AO system's functioning. This is particularly valuable for tests of new control algorithms as well as to support student engagement in an academic environment. We plan to make the code freely available to the community.