Folded optics
From Infogalactic: the planetary knowledge core
Folded optics is an optical system in which the beam is bent in a way to make the optical path much longer than the size of the system. Prismatic binoculars are a well-known example.
An early conventional film (35 mm) camera was designed by Tessina that used the concept of folded optics.
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- [1] — Origami Lens
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