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Keywords:

  • biomimetics;
  • compound eye;
  • ommatidia;
  • planar micro-optics
Thumbnail image of graphical abstract

Nature provides ten different anatomical structures of compound eyes for arthropod vision. The cover image presents the direct visualization of light propagation inside natural compound eyes. Despite being an inspiration to engineering, none of these vision schemes is well understood. The method presented by K.-H. Jeong and coworkers on page 2169 provides a novel approach to emulating the optical schemes and functions of two representative types of simple apposition and reflecting superposition.