I wish could add pictures but I dont how to but more than one image on a single post. You would need a larger fresnel lense the size of screen to make the light ways equal when they reach your eyes. The longer the light rays are the darker they are when they reach your eyes. Once you get it build you notice that the screen is %100 viewable from a distance and at eye level, this is because the light rays coming from the projector are not the same length, thats why the center is brighter than the other areas around the screen. Once you get it just right build the rest of your frame around it. Now here is were the trail and error come in, you have to figure out how to position your mirror and projector to get a image that fits you screen and is focused. Mine is made with the Sony PSone Lcd, a 42 watt(2700 lumen) compact floruescent light bulb and the Figinon rear projection tv lense.īuild a frame for the screen just something to hold it up, my screen was made from a piece of plex-glass and a opaque show curtain. Now for the projector, first build it so that the image will show correctly on the this mean that it shows up on the wall like a regular tv. You need a large mirror if you want to keep it small and keep the image bright. After you figure out how big you want your screen find a mirror that is a couple of inches smaller than your screen or one the size of screen. To start out figure how big you want screen, 40" to 50" inches are easy to make but 60 and up are harder, unless you are going to but the projector directly behind you screen. The one a bought today was 70" x 72" ( 178cm x 183cm).I'm here to help anyone who is interested in building a rear projection, I have succesfully build a rear projection tv use a design I found at I don't know if there are calculation that you can use to figure out how far your projector from the I just used trail and error and it works. The only thing I would like is a bigger sheet. If you are experimenting with rear projection ( due to cockpit room size restrictions like I am ) give this a shot. If anybody is interested, a link to the product is supplied below. You cant see the projector halo, and the colors are fantastic. It is actually brighter on the reverse side that it is on the projection side! It is not actually clear, but a kind of fogged vinyl.Īnyway, I got home a checked it out.Wow. It is called Zenith Bath styles Shower Liner, color Clear, Model # H28K. So today, I go to the home Depot ( A USA hardware store) and found a shower curtain Liner made by Zenith. This got me thinking about the shower curtain idea again, but now I knew what to look for. They sent me back a vinyl material that was opaque & light gray in color. I sent a email to "Dazian" who makes professional screens & rear projection material and asked for a sample. I have posted my reviews of these (earlier in this thread), but I wanted to post that I have finally found what I was looking for! I have tried a high thread count liner, as well as a white shower curtain. I have been in search of a good rear projection screen. It will also lower the surface brightness as the weave will be more coarse. 150-200 might help to eliminate the hot spot. You might try the bed sheet idea again with a much lower thread count. I would love to have more detail on this as well. "a bright polycarbonate and grey rear projection foil." If it wasn't for the dull image brightness, I would probably stick with the curtain.Īre there any other surfaces that should be considered? Summary: No Clear winner, as each surface had different strengths & weaknesses. Overall smoothness: The vinyl curtain gave a more professional looking image than the bed sheet. The Bed sheet had serious issues here, even when I lowered the projector so that the lens was blocked from direct viewing. Lens hot spot: The clear winner here was the Curtain, and no hot spot could be seen even with the projector at eye level. The opaque shower curtain reduced the brightness a little more that I liked, so a slight advantage goes to the Bed sheet here.Ĭolor: The bed sheet produced better colors ,but again, sometimes to bright. Some of the lighter colors became washed out. Here are my comparisons for all its worth īrightness: The Bed Sheet was much brighter than the Shower Curtain, but almost too bright. I have now experimented with two inexpensive options white opaque shower curtain, bed sheet ( 500 thread count). I have been in search of a good rear projection screen that wont break the bank but yet has a good enough quality that I can live with.
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