27 July 2016 LIFT on Keck: analysis of performance and first experimental results
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Abstract
Wavefront sensing in the near infrared has become an attractive option with the advent of new low-noise infrared detectors, such as the SAPHIRA (Selex) and RAPID (CEA/Sofradir) APD arrays. The performance improvements obtained with the H2RG-based Keck I near-infrared tip-tilt sensor is motivating the implementation of a near-infrared low-order sensor for Keck II. The recently proposed focal plane sensor algorithm LIFT could fulfill this role. We show here an analysis of performance, demonstrating that LIFT would provide a significant gain (∼ 1 magnitude) over the current tip/tilt sensor at low flux, as well as the first experimental validation of LIFT on Keck with a calibration source.
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C. Plantet, P. Wizinowich, T. Fusco, B. Neichel, S. Ragland, B. Femenia, R. Rampy, "LIFT on Keck: analysis of performance and first experimental results", Proc. SPIE 9909, Adaptive Optics Systems V, 990963 (27 July 2016); doi: 10.1117/12.2232545; https://doi.org/10.1117/12.2232545
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