An optical fiber system to perform bidimensional spectroscopy

The article describes a fiber optic system contrived to perform spectral imaging of extended objects. It consists of two fiber bundles mounted simultaneously on the spectrograph, which allow one to change the spatial and spectral resolution without any modification in the spectrograph's configuration. Technical details of the design and building processes, as well as its peculiarities when acquiring and reducing data, are reported. Special attention is given to the problem of guiding and centering the object, which is of importance for such systems.