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Science camera calibration for extreme adaptive optics

Wallace, J. Kent and Green, Joseph J. and Shao, Michael and Troy, Mitchell and Lloyd, James and Macintosh, Bruce (2004) Science camera calibration for extreme adaptive optics. In: Advancements in Adaptive Optics. Proceedings of SPIE. No.5490. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, pp. 370-378. ISBN 9780819454225.

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The nascent field of planet detection has yielded a host of extra-solar planet detections. To date, these detections have been the result of indirect techniques: the planet is inferred by precisely measuring its effect on the host star. Direct observation of extra-solar planets remains a challenging yet compelling goal. In this vein, the Center for Adaptive Optics has proposed a ground-based, high-actuator density extreme AO system (XAOPI), for a large (~10 m) telescope whose ultimate goal is to directly evidence a specific class of these objects: young and massive planets. Detailed system wave-front error budgets suggest that this system is a feasible, if not an ambitious, proposition. One key element in this error budget is the calibration and maintenance of the science camera wave front with respect to the wave-front sensor which currently has an allowable contribution of ~ 5 nanometers rms. This talk first summarizes the current status of calibration on existing ground-based AO systems, the magnitude of this effect in the system error budget and current techniques for mitigation. Subsequently, we will explore the nature of this calibration error term, it’s source in the non-commonality between the science camera and wave front sensor, and the effect of the temporal evolution of non-commonality. Finally, we will describe preliminary plans for sensing and controlling this error term. The sensing techniques include phase retrieval, phase contrast and external metrology. To conclude, a calibration scenario that meets the stringent requirement for XAOPI will be discussed.

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Macintosh, Bruce0000-0003-1212-7538
Additional Information:© 2004 Society of Photo-Optical Instrumentation Engineers (SPIE). This work was carried out by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. This work has been supported in part or full by the National Science Foundation Science and Technology Center for Adaptive Optics, managed by the University of California at Santa Cruz under cooperative agreement No. AST-9876783.
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Subject Keywords:extreme adaptive optics, calibration, extra-solar planet detection
Series Name:Proceedings of SPIE
Issue or Number:5490
Record Number:CaltechAUTHORS:20190221-110523136
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Official Citation:James Kent Wallace, Joseph J. Green, Michael Shao, Mitchell Troy, James P. Lloyd, and Bruce Macintosh "Science camera calibration for extreme adaptive optics", Proc. SPIE 5490, Advancements in Adaptive Optics, (25 October 2004); doi: 10.1117/12.552362;
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:93105
Deposited By: George Porter
Deposited On:25 Feb 2019 23:46
Last Modified:16 Nov 2021 16:55

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