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Originally Posted by iamnormal
It would be reversed and upside down. So you would have to set the tv on its top but the words would still be reversed.
It would also dim. It would be of low image quality unless it was from a high resolution screen.
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As I understand it (I've been doing some reading to catch up), in order to properly view through or use a lense and in order to have a clear picture, you need to be able to adjust the lense -this was one of the steps in which you move the wall with the lense mounted on it moving towards and away from the screen. The distance between the lense and what you want projected is called the focal length. When the focal length is so that the picture is at its clearist on the wall, that is the proper focal length for that distance to the wall. If you have to move your projecter closer or fartehr from a wall, you will need to adjust the lense wall again. The problem with the design is simply that a normal tube televsion does not have the brightness needed to produce a bright projected picture. As the light is refracted through the lense and magnified, x amount of light is spread out evenly over a larger surface. As x amount of light was bright on a 20 inch screen, that same x amount of light when spread out would be equally dimmer depending on how much you spread the light. If the screen was oroginally 20 inches, and if you project an image that is 40 inches, you lose half the brightness.
As much as this sounds good on paper, I could only see it possibly working in a very dark room. Otherwise, I'd go get a $1000 projector at your local electronics store.