The imager is an essential element with its powerful diagnostic capabilities of fine imaging source
identification and spectral sensitivity to both continuum and broadened lines. It will observe,
simultaneously with the other instruments on board INTEGRAL, celestial objects of all classes
ranging from the most compact galactic systems to extragalactic objects.
IBIS features a coded aperture mask and a novel large area ( ~ 3,000 cm2) multilayer detector which utilises both Cadmium Telluride (16,384 detectors) and Caesium Iodide elements (4,096 detectors) to provide the fine angular resolution ~ 12 arcmin, wide spectral response (15 keV to 10 MeV), high resolution timing (60 ms) and spectroscopy (6% at 100 keV) required to satisfy the mission's imaging objectives.