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Something like this:Quote:
Originally Posted by Alex Jay
http://www.gorgewindsinc.com/graphic...sion170.Lo.jpg
I think it would be quite straight forward, note this setup still uses 3 projectors. And they'd have to have a pretty short throw on them.
wow, that is cool, just a little on the big side still, if I had the room that that would be a dream!
I'm pretty sure you could tighten the radius a little and still get good results.
And two projectors shouldn't present a problem.
Sorry if I am misguided here but a friend of mine who does multiple projector setups for music events told me that for tight curved screens only rear projection would work otherwise a fish eye effect occurs. When using front projection he said that the maximum curve can only be that of the projector lense curve.
Just my 2 pence worth (that is what it really is worth lol). I will find out myself soon due to requiring a 2 projector setup
Chris
That's why you use nthusim software to correct the warp........Quote:
Originally Posted by cjellwood
This is what I mean by keeping to the angle of the lense. Short throw projectors allow tighter curves due to having a more bulbous lense.
http://www.leons-world.com/img/proj.gif
It seems to be a general rule of thumb that does not seem to get much mention in the projection threads and makes sense from a theoretical point of view or whichever way you look at it. Nthusim is great at doing what it does but the rules of how light travels and bounces off the screen still need to be adhered to.
My pit will start with only a slightly curved single projection screen so will test this theory out asap and post results in the relevant thread.
Chris
Chris
I wouldn't 'worry' too much about the theory side of things. 3 x short throw projectors + Nthusim + front projection works a treat. In fact, if you don't use short throw, you may run into problems getting the projectors far enough away from the screen without elements of the structure getting in the way.
whilst playing around with a small pico projector today (and some foamex as the screen) I see that the theory is correct. A curved screen can be made without nthusim if the lense curve is maintained on the screen bend, but like you said; the issue then becomes distance and obstructions :( Good news is that the screens can have the top and bottom curved inwards too if kept in line with the lense curve which is interesting. I might pay a visit to my fiberglass fingered friend to see what he can pull out of his hat with regards a 'top and side' curved screen. One would need to get it right first time otherwise the screen would end up as a very expensive half pipe for the kids lolQuote:
Originally Posted by Sean Nixon
Btw, Foamex is a brilliant projection screen material.
Chris
Yes, I have a sample here too. ;)Quote:
Originally Posted by cjellwood
Whilst at my local sign writers today I noticed they produce big displays that are curved like this one in the picture
http://www.leons-world.com/img/screen.jpg
Matt or gloss white clear plain displays are available and the frame behind it collapses into a tidy pile when it is not needed. The display sheet is magnetic and simply locks to the frame! Is this a perfect solution for curved screens or what! Costs around £300 for a plain screen and stand I think
Here is more info http://www.odysseyexhibitions.co.uk/...ck_pop_up.html
Chris