AMBER : a near infrared focal instrument for the VLTI
  AMBER is the General User near-infrared focal instrument of the Very Large Telescope interferometer. Its specifications are based on three key programs on Young Stellar Objects, Active Galactic Nuclei central regions, masses and spectra of hot Extra Solar Planets. It has an imaging capacity because it combines up to three beams and very high accuracy measurement are expected from the spatial filtering of beams by single mode fibers and the comparison of measurements made simultaneously in different spectral channels. 
Romain G. Petrov, Fabien Malbet, Andrea Richichi, Karl-Heinz Hofmann,   Denis Mourard, and the AMBER consortium