Abstract
We present FALCON which is an original concept for a next generation instrument which could be used on the ESO very large telescope (VLT) and on the future extremely large telescopes (ELT). It is a multi-object integral field spectrograph with multiple small integral field units (IFUs). Each of them integrates a tiny adaptive optics system coupled with atmospheric tomography to solve the sky coverage problem. This therefore allows to reach spatial (∼0.25 arcsec) and spectral ( R ⩾ 5000) resolutions suitable for distant galaxy studies in the 0.8–1.8 μm wavelength range. In the FALCON concept, the adaptive optics correction is only applied to small and discrete areas selected within a large field. This approach implies to develop miniaturized devices, such as deformable mirrors (DM) and wavefront sensors (WFS) for wavefront correction.
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