![]() ![]() Teleprompter test without mirror film at the same exposure as the previous test. Getting the angle just right and the text virtually disappears due to destructive interference.Ĭhange the angle slight, and you get a faint double image but an image none the less. Unfortunately, the piece of glass I have is just the right thickness to produce almost perfect destructive interference at right around 45°. In fact, it may be possible to use an un-mirrored sheet of glass provided you have it angled in such a way or it’s sufficiently thick or thin that the reflections from both surfaces don’t destructively interfere. On its own, the glass could be possible without any coatings if I get the angle right or it was a different thickness. ![]() Total cost if buying everything, maybe $15-depending on the glass. While the holder part of things was easy enough to construct, solving the glass problem has been a bit more challenging. My prototype was fabricated out of 3/16-inch foamcore board and an 11×14 inch piece of glass form a picture frame. Especially since the design of a teleprompter is easy enough, you need something to hold the display-in my case an iPad2-and a partially silvered mirror at 45° to the display to reflect it in front of the camera. I’ve been working on a DiY teleprompter for the past several weeks in an attempt to put together something that was functionally identical to a commercial teleprompter product, but wouldn’t cost significant money out of pocket.
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