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Fly-Eyes Cryovessel Mechanical Drawings


    Pueo-Nui  was first proposed to the CFHT Science Advisory Council by Olivier Lai and Francois Ménard in November, 2001 as an upgrade to the AO Bonnette with the potential to produce superb diffraction-limited images in the K band (? = 2.1 µm) and excellent images at visible wavelengths that could possibly be implemented on a short time scale, at modest cost.

   Since a cost-effective upgrade to the AO Bonnette wavefront-sensor from 19 to roughly 100 channels is critical to the Pueo-Nui proposal, in 2002 the team of Jean-Charles Cuillandre (CFHT), Gerry Luppino (IfA) and James Beletic (Keck) proposed the Fly-Eyes project.  Fly-Eyes is a wavefront-sensor detector demonstration project with the goal of showing that a Lincoln Labs CCID-35 CCD, designed specifically for curvature-based wavefront-sensors, can effectively match the performance of costly avalanche photo-diodes.

    The Pueo-Nui proposal took on new life in mid-September 2003, as a formal CFHT project, which now includes the Fly-Eyes wavefront-sensor detector demonstrator.  The Project Scientist is Olivier Lai; the Project Manager/Engineer is Derrick Salmon.  Project goals at the moment are two-fold:  1) development of a Pueo-Nui technical feasibility report and 2) development of the Fly-Eye's demonstrator for replacement of wavefront-sensor avalanche photo-diodes with much cheaper Lincoln Labs CCID-35 CCDS.