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Lucid Dreamer asked: I think there’s some sort of semi-transparent screen that can be placed on an overhead projector and then connected to my laptop so that my powerpoint slides can be projected big-screen. Anyone know what this is called or where to get one?
carissawlkr asked:
Kiran R asked: I’m guessing an OHP uses a Fresnel lens and triplet lens and has a cold mirror inside it… by fitting a VGA screen and a powerful projector bulb into it would it be possible to turn it into a computer projector?
Greenman asked: apparently it needs a concave mirror, condenser lenses, the slide or film, the projection lens, then the screen.
thanks a lot
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