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The design of a multiperspective, ‘look around’ time-multiplexed autostereoscopic display featuring eight independent viewing zones is described. In order to achieve full-motion colour imagery, a novel high-framerate image projector, based on a digital micromirror display (DMD) with an interface capable of directly linking to commercial graphical processing units (GPUs), is utilised. A high-speed synchronised liquid-crystal display (LED)-based light engine is employed to allow for high-framerate sequential colour imagery. Real-time interactive rendering of multiperspective imagery with standard GPUs has been demonstrated.

We report on the development of a highly scalable head-tracking system capable of tracking many users. Throughout the operating area, a series of high-speed (4 kHz) near-infrared LED-based Digital Light Processor (DLP) picoprojectors provide overlapping illumination of the volume. Each projector outputs a sequence of binary images which encode the position of each pixel within the projected image as well as an identifier sequence for the projector. Overlapping projectors use differing temporal multiplexing to allow sensor discrimination and background rejection. Pixel positions from multiple projectors received by each sensor are triangulated to obtain position and orientation.

Over the last decade, investigations into fatigue damage precursors have established that metal components subjected to cyclic stress develop surface-evident defects such as microcracks and slip bands [1-4]. These defects evolve with the development of fatigue. Detection of such damage precursors on a component and examination of their evolution can thus provide information on the state of the critical parts and prognostics of their catastrophic failure. Evolving surface defects, although of a different nature, can similarly be observed on some materials when subjected to thermal cycling fatigue.