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Multi-conjugate Adaptive optics Demonstrator (MAD) is an instrument that allowed the European Southern Observatory's Very Large Telescope to observe celestial objects with most of the atmosphere's blurring removed. As other adaptive optics systems, it works by performing real-time corrections to the atmospheric turbulence by means of computer-controlled deformable mirrors. Its particularity is the correction over a wider field of view than previous systems, that only used a single deformable mirror.
- ^ New Adaptive Optics Technique Demonstrated, ESO 30 March 2007
- ^ Stellar Family Portrait Takes Imaging Technique to New Extremes, SpaceRef.com 13 December 2009