Wall Eye:
Build your own opaque projector
Steve Lodefink | Make Vol. 14- 2008 | Pdf | 5 pgs | 2 mb
What's an opaque projector? You know, one of those contraptions that takes flat, reflective subjects such as printed pages, leaves, or coins, and projects them onto a screen or wall. Opaque projectors were common classroom presentation tools during most of the 20th century.
Although made largely obsolete by the use of video cameras coupled to video displays, opaque projectors are still being made and sold. Marketed today mainly to art students and hobbyists for use as drawing enlargers, entry-level models tend to be dim little plastic toys that can only accommodate puny 3" or 4" originals, and have to be used in a totally darkened room due to their small apertures and weak light sources. If you're lucky enough to find one of the majestic 1,000-watt giants from yesteryear at a swap meet, then consider yourself charmed. I was not so lucky.
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