Post on 12-Feb-2016
description
Workshop Scientific Detectors for Astronomy June 16-22, 2002 Waimea, Hawai`i
CCD wavefront sensing system for the ESO Multi-conjugate Adaptive Optics Demonstrator (MAD)
C.Cavadore, C.Cumani, The ESO-ODT team, F.Franza, E.Marchetti, The ESO AO group
European Southern Observatory
• MCAO prototype toward ELT (3-8 stars, high Strehl over 2’ in K)
• Visible Wavefront sensors : 5 CCD Marconi 50• 2 AO correction methods 3 + 2 CCD complete
heads• ESO FIERA controller 12 video inputs• CCD Head must be compact
• 90x60x40 mm, light : 500g, TEC cooling, vacuum, Embedded micro lens array New head designs
• Mounted on XY stages• Find the star to sense the wavefront• Cable length and stiffness requirements : soft cables
• Low noise and high frame rate : <3.5e-, 500Hz• Texp_CCD1 = N* Texp_CCD2 and synchronized
Poster #10
Workshop Scientific Detectors for Astronomy June 16-22, 2002 Waimea, Hawai`i
CCD wavefront sensing system for the ESO Multi-conjugate Adaptive Optics Demonstrator (MAD)
2’ field of view
Micro lens array
XY stageSoft CCD cables
Head
Pickup mirror
200 mm
ESO FIERA system
AO Marconi CCD504 ports/CCD used
24 m pixels
Opto-mechanical setupShack Hartmann WFS