Compact wide-field-of-view imager with a designed disordered medium
- 237 Downloads
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
This research was supported by Grant-in-Aid for JSPS Fellows from the Japan Society for the Promotion of Science (JSPS).
- 1.J.W. Goodman, Introduction to fourier optics (McGraw-Hill, New York, 1996)Google Scholar
- 2.D.J. Brady, N. Hagen, Opt. Express 17, 2026 (2009)Google Scholar
- 5.R. Fergus, A. Torralba, W.T. Freeman, MIT CSAIL Tech. Rep. 1 (2006)Google Scholar
- 6.P. R. Gill, D. G. Stork, Proc. Imaging Appl. Optics, p. CW4C.3 (2013)Google Scholar