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PWFS4ELTs budget

PWFS4ELTs budget. NOTES 1FTE = 41KE YES FoV: 2x2 arcmin No ADC No pupil rerotation. WFS total cost (HW+LABOUR) = 345KE. PWFS. Diff. Pist unit. FISBA. The lab set-up. PWFS (2) assembly. Aim of the set up is to measure at the same time a certain differential piston

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PWFS4ELTs budget

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  1. PWFS4ELTs budget • NOTES • 1FTE = 41KE • YES FoV: 2x2 arcmin • No ADC • No pupil rerotation WFS total cost (HW+LABOUR) = 345KE

  2. PWFS Diff. Pist unit FISBA The lab set-up PWFS (2) assembly Aim of the set up is to measure at the same time a certain differential piston introduced using (3) with the two instrument FISBA (1) and PWFS (2). FISBA interf. Unit (1) Unit for (3) Differential piston The differential piston unit is showed in the next slide !

  3. Details of Differential piston unit Piezo driver for cube displacements Reflecting surfaces of the cubes DP unit Fisba Int

  4. A first result from lab Comparison of interferometer and pyramid measurements of the same differential piston, using LBT pyramid wavefront sensor and FISBA interferometr. RMS data with respect to fit is between 14.7 nm and 16.1 nm for linear fit and linear fit through origin respectively.

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