Original: Obsolete technologies Eidophor oil-film projectors ILA (Light Image Amplifier) light valves Schmidt-CRT, developed by Kloss Video Talaria oil-film projectors DIY video projectors With a growing DIY-community and an increasing interest in low cost devices, some hobbyists have endeavored to build their own projectors from kits, sourced components, or from scratch.
Simplified: Obsolete technologies Eidophor oil-film projectors Telaria oil-film projectors ILA (Image Light Amplifier) light valves.