Compact Catadioptric Wide Imaging with Secondary Planar Mirror

Ko, Young-Jun;Yi, Soo-Yeong

  • Received : 2019.03.02
  • Accepted : 2019.05.31
  • Published : 2019.08.25


Wide FOV imaging systems are important for acquiring rich visual information. A conventional catadioptric imaging system deploys a camera in front of a curved mirror to acquire a wide FOV image. This is a cumbersome setup and causes unnecessary occlusions in the acquired image. In order to reduce both the burden of the camera deployment and the occlusions in the images, this study uses a secondary planar mirror in the catadioptric imaging system. A compact design of the catadioptric imaging system and a condition for the position of the secondary planar mirror to satisfy the central imaging are presented. The image acquisition model of the catadioptric imaging system with a secondary planar mirror is discussed based on the principles of geometric optics in this study. As a backward mapping, the acquired image is restored to a distortion-free image in the experiments.


Catadioptric system;Wide FOV image;Geometric optics;Hyperbolic mirror;Central imaging


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Supported by : SeoulTech (Seoul National University of Science and Technology)