Generic Edge Unit

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Several well-known edge units, for example Ow’s 60-degree unit or Simple Edge Unit can be thought of as special cases of a generic edge unit whose connection angle can be arbitrary. It seems both specific cases (e.g. for 90° angle) and the idea of generalizing the design to arbitrary angles have been invented independently by multiple people.

I wish to thank Dirk Eisner who provided me with lots of useful information about such units:

Tomoko Fuse’s […]. She has another folding, which is equal to your SEU, in Unit Origami Wonderland. This book is in Japanese. She named it something like 45°-60°-unit. Here the second end of the module is different. Francis Ow named it 90-degrees unit. He has a diagram in his booklet Modular Origami. He started with a 1/6 segmentation, but then it is similar to your unit. With my notation I would name it p45f90 -|- p45f90 unit. I have published my way, e.g. in Convention Book 5OSME, Singapour, 2010 , Origami Christmas Book, edited by Anna Kastlunger, 2012 or Convention Book Origami Deutschland, Weimar, 2013.

Dirk’s notation for generalized edge modules can be found at this address.