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Compact wide-field-of-view imager with a designed disordered medium

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Abstract

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.

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Acknowledgments

This research was supported by Grant-in-Aid for JSPS Fellows from the Japan Society for the Promotion of Science (JSPS).

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Authors and Affiliations

  1. Department of Information and Physical Sciences, Graduate School of Information Science and Technology, Osaka University, Suita, Osaka, 565-0871, Japan

    Tomoya Nakamura, Ryoichi Horisaki & Jun Tanida

  2. Research Fellow of the Japan Society for the Promotion of Science, Chiyoda, Tokyo, 102-7472, Japan

    Tomoya Nakamura

Authors
  1. Tomoya Nakamura
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  2. Ryoichi Horisaki
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  3. Jun Tanida
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Correspondence to Ryoichi Horisaki.

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Nakamura, T., Horisaki, R. & Tanida, J. Compact wide-field-of-view imager with a designed disordered medium. Opt Rev 22, 19–24 (2015). https://doi.org/10.1007/s10043-015-0060-2

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  • DOI: https://doi.org/10.1007/s10043-015-0060-2

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