Mechanical Iris

thingiverse

This project was created some time ago and still functions well. Although you may have encountered it on Instructables, this post aims to reach those who haven't. The design allows full opening but not complete closure due to the thickness of its segments. A new version with thinner parts is currently in development. If visuals don't suffice, refer to this link on Instructables for better guidance: http://www.instructables.com/id/Paper-Mechanical-Iris/