Advancements in FPA density and associated wide-field-of-view infrared sensors (>=4000x4000 detectors) have
outpaced the current-art HWIL technology. Whether testing in optical projection or digital signal injection modes,
current-art technologies for infrared scene projection, digital injection interfaces, and scene generation systems simply
lack the required resolution and bandwidth. For example, the L3 Cincinnati Electronics ultra-high resolution MWIR
Camera deployed in some UAV reconnaissance systems features 16MP resolution at 60Hz, while the current upper limit
of IR emitter arrays is ~1MP, and single-channel dual-link DVI throughput of COTs graphics cards is limited to
2560x1580 pixels at 60Hz. Moreover, there are significant challenges in real-time, closed-loop, physics-based IR scene
generation for large format FPAs, including the size and spatial detail required for very large area terrains, and multi -
channel low-latency synchronization to achieve the required bandwidth. In this paper, the author’s team presents some
of their ongoing research and technical approaches toward HWIL testing of large-format FPAs with wide-FOV optics.
One approach presented is a hybrid projection/injection design, where digital signal injection is used to augment the
resolution of current-art IRSPs, utilizing a multi-channel, high-fidelity physics-based IR scene simulator in conjunction
with a novel image composition hardware unit, to allow projection in the foveal region of the sensor, while non-foveal
regions of the sensor array are simultaneously stimulated via direct injection into the post-detector electronics.