Current Optics and Photonics

Optical Society of Korea (한국광학회)
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Wide Field-of-View Imaging Using a Combined Hyperbolic Mirror

  • Yi, Sooyeong (Department of Electrical and Information Engineering, Seoul National University of Science and Technology) ;
  • Ko, Youngjun (Department of Electrical and Information Engineering, Seoul National University of Science and Technology)
  • Received : 2017.05.19
  • Accepted : 2017.07.13
  • Published : 2017.08.25
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Abstract

A wide field-of-view (FOV) image contains more visual information than a conventional image. This study proposes a new type of hyperbolic mirror for wide FOV image acquisition. The proposed mirror consists of a hyperbolic cylindrical section and a bowl-shaped hyperbolic omnidirectional section. Using an imaging system with this mirror, it is possible to achieve a $213.8^{\circ}$ horizontal and a $126.94^{\circ}$ vertical maximum FOV. Parameters of each section of the mirror are designed to be continuous at the junction of the two parts, and the resultant image is seamless. The image-acquisition model is obtained using ray-tracing optics. To rectify the geometrical distortion of the original image due to the mirror, an image-restoration algorithm based on conformal projection is presented in this study. The performance of the proposed imaging system with the hyperbolic mirror and its image-restoration algorithm are verified by experiments.

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References

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