  SHARK-NIR is one of the two coronagraphic instruments proposed for the Large
Binocular Telescope. Together with SHARK-VIS (performing coronagraphic imaging
in the visible domain), it will offer the possibility to do binocular
observations combining direct imaging, coronagraphic imaging and coronagraphic
low resolution spectroscopy in a wide wavelength domain, going from 0.5{\mu}m
to 1.7{\mu}m. Additionally, the contemporary usage of LMIRCam, the
coronagraphic LBTI NIR camera, working from K to L band, will extend even more
the covered wavelength range. In January 2017 SHARK-NIR underwent a successful
final design review, which endorsed the instrument for construction and future
implementation at LBT. We report here the final design of the instrument, which
foresees two intermediate pupil planes and three focal planes to accomodate a
certain number of coronagraphic techniques, selected to maximize the instrument
contrast at various distances from the star. Exo-Planets search and
characterization has been the science case driving the instrument design, but
the SOUL upgrade of the LBT AO will increase the instrument performance in the
faint end regime, allowing to do galactic (jets and disks) and extra-galactic
(AGN and QSO) science on a relatively wide sample of targets, normally not
reachable in other similar facilities.
