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Pigeon System
Pigeon System  

A fairly simple, yet efficient way to view stereoscopic images - even large format ones - is the so-called "Pigeon System".

On November 16th, 1904, Léon Pigeon (a professor at the University of Dijon, France), applied for a patent to protect his invention. So how does his system work?

Unlike Wheatsone's mirror-stereoscope, which used two mirrors, Pigeon's invention only needs one mirror. And therefore, only one of the images forming a stereo-pair (the one viewed through the mirror) has to be printed reversed or "mirror-inverted".

The drawing on the left illustrates the basic principle: the observer views one image directly (in this case the right-eye view), the other one through a small mirror (in the example the left eye view).

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Last modified on May 4, 2005
Copyright © 1999 - by and Alexander Klein. All rights reserved.