The Early Stereoscope
1890s - William Friese-Greene files a patent, makes first 3D moving projections, viewer used a stereoscope to combine to seperate images that were projected side by side. Awkward and difficult.
1900 - Frederick Eugene Ives patented his stereo camera rig
FREDERICK EUGENE IVES
1922 - The Power of Love - anaglyph glasses used (red/green)
1935 - Audioscopiks - documentary showcasing the technology (MGM)
1930s-1940s - Polaroid filters developed for 3D projection systems.
1952-1955 - Golden Era of 3D