• Corpus ID: 9333728

From Pop-Up Cards to Coffee-Cup Caustics: The Knight's Visor

@article{Jakus2012FromPC,
  title={From Pop-Up Cards to Coffee-Cup Caustics: The Knight's Visor},
  author={Stephanie Jakus and Joseph O'Rourke},
  journal={ArXiv},
  year={2012},
  volume={abs/1206.1312}
}
As a pedagogical exercise, we derive the shape of a particularly elegant pop-up card design, and show that it connects to a classically studied plane curve that is (among other interpretations) a caustic of a circle. 

References

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The Pop-Up Book
A tape cassette which automatically brings the tape into direct engagement with the detection head and into indirect engagement with the drive wheel of a machine when the tape cassette is pushed in
The Penguin Directory of Curious and Interesting Geometry
  • 1991