"Single-strip film projection greatly simplified theatrical exhibition of stereoscopic motion pictures." -3D Revolution: The History of Modern Stereoscopic Cinema (2012)
The Depix Camera System was developed by inventors Alvin and Mortimer Marks, and captures left and right eye images on a single 35mm film frame. Alvin Marks had been experimenting with 3D technology 30 years previous, receiving a patent in 1951 for the "three-dimensional intercommunicating system".
For Friday the 13th Part III (1982), the first major 3D release to use the Depix system, Paramount Pictures shipped out full 3D kits to 700 theatres nationwide. The kits included: a 3D lens (1), mirror box attachment (2, 3, 4), aperture plates, 3D test strip (5), and instructions (6, 7). Inside the 3D lens attachment consisted of mirrors that would separate the left and right eye images (seen below in images #3 and #5 as top and bottom), and project them out on screen as a single image.
For Friday the 13th Part III (1982), the first major 3D release to use the Depix system, Paramount Pictures shipped out full 3D kits to 700 theatres nationwide. The kits included: a 3D lens (1), mirror box attachment (2, 3, 4), aperture plates, 3D test strip (5), and instructions (6, 7). Inside the 3D lens attachment consisted of mirrors that would separate the left and right eye images (seen below in images #3 and #5 as top and bottom), and project them out on screen as a single image.
The mainstream 3D craze of the 80s lasted only a few short years. The novelty wore off after the release of Jaws and Amityville 3-D in 1983. Of course, years later, 3D would have another short burst of mainstream cinema success beginning in 2008 with Journey to the Center of the Earth, and more-or-less fading away after the release of Gravity in 2013.