  In astrophysics, several key questions in the hard X soft Gamma-ray range
(above 100 keV) require sensitivity and angular resolution that are hardly
achievable with current technologies. Therefore, a new kind of instrument able
to focus hard X and gamma-rays is essential. Broad band Laue lenses seem to be
the only solution to fulfil these requirements, significantly improving the
sensitivity and angular resolution of the X and gamma-ray telescopes. This type
of high-energy optics will require highly performing focal plane detectors in
terms of detection efficiency, spatial resolution, and spectroscopy. This paper
presents the results obtained in the project 'Technological Readiness Increase
for Laue Lenses (TRILL)' framework using a Caliste-HD detector module. This
detector is a pixel spectrometer developed at CEA (Commissariat a Energie
Atomique, Saclay, France). It is used to acquire spectroscopic images of the
focal spot produced by Laue Lens bent crystals under a hard X-ray beam at the
LARIX facility (University of Ferrara, Italy).
