Compact wide-field-of-view imager with a designed disordered medium
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Disordered media have been exploited for realizing compact lensless imagers and spectroscopes. However, random scattering causes significant loss of the light energy acquirable by a sensor. Here, we present a compact, wide-field-of-view (wide-FOV) imager in which the usable light energy is increased using a designed disordered medium. The density of scattering air holes in a glass is spatially distributed so as to achieve an effective graded index, which guides light from a wide-FOV toward a sensor. Based on numerical experiments, we demonstrated brighter wide-FOV imaging than an imager using a conventional random medium.
KeywordsComputational imaging Wide field-of-view Disordered medium Lensless imaging
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