[DIY] Dual LCD Polarized display for Cheap!

[nubie]

Cool, I am glad to hear somebody is enjoying polarized light

This is a translation of that forum into English (haven't yet read it, will now.)
http://translate.google.com/translate?h ... 26hs%3DaK5" onclick="window.open(this.href);return false;


For Projection what you are going to need is called a "first surface" or "front surface" mirror and LCD projectors that are polarized at 45° or 135°, also a Silver Screen (or similar screen that claims to Preserve Polarization, or is good for polarized projection ).

I would strongly suggest that the 2 projectors have separate light paths (two lenses at the output). You will have bad results if you attempt to use a splitter (mirror glass).

Instead use First Surface or Front Surface standard mirror (or even a normal mirror for a start.) I have 2 good links to Lumenlab.com forums (you may need to register on the forum.)

[nubie]

This is the most information I have, he says to use aluminum Graffiti paint and add "matte" finish modifier (mix into the paint) paint on a smooth surface for a screen.

http://www.lumenlab.com/forums/index.ph ... reo3d&st=0" onclick="window.open(this.href);return false;


For a design follow something like this: http://www.lumenlab.com/forums/index.ph ... t&p=208802" onclick="window.open(this.href);return false;

[anotherFrench]

I'm sorry, I have to answer point by point because I'm not sure I understand well everything you wrote, my english is very limited, especially with those "technical" words.

Cool, I am glad to hear somebody is enjoying polarized light

This is a translation of that forum into English (haven't yet read it, will now.)
http://translate.google.com/translate?h ... 26hs%3DaK5" onclick="window.open(this.href);return false;

great ! now even I can't read my own text anymore (just kidding)

For Projection what you are going to need is called a "first surface" or "front surface" mirror

I think I understand what you mean but do those mirror exist in half transparent?
for my project I need a mirror that would reflect half of the light and let 50% trough.
even if they exist I'm not sure to find them in france and I think this kind of product may be complicated to ship internationally

and LCD projectors that are polarized at 45° or 135°

you mean LCD monitors right?
I didn't look at the polarisation of my lcd's yet, it was very hard to find 2 15" that would be suitable for DIY project but I read somewhere that if the polarisation is wrongly oriented, I can take the filters off to apply new ones. it won't probably be very simple but to me, this project is meant to learn some technical aspect more than to give the best results.
of course I hope it will work great but the most important is what I can learn from it, as it is my first atempt to create such a project.

I would strongly suggest that the 2 projectors have separate light paths (two lenses at the output). You will have bad results if you attempt to use a splitter (mirror glass).

naah, that would be too easy LOL, I want to try with a splitter first to see if I can come up with some solution, anyway I bought 2 lenses just in case the result is too bad, then I'll use them to create a more conventional setup

This is the most information I have, he says to use aluminum Graffiti paint and add "matte" finish modifier (mix into the paint) paint on a smooth surface for a screen.

it's great information, I did spend a lot of time searching for information, especially about those silver screen because I wish to have a complete DIY set-up so I will read the link carefully and see if it is possible to make one

I thank you for taking so much of your time to answer, I hope this will help me to finish the project in good conditions and soon be able to see 3d on my own selfmade projector

[nubie]

I'm sorry, I have to answer point by point because I'm not sure I understand well everything you wrote, my english is very limited, especially with those "technical" words.

For Projection what you are going to need is called a "first surface" or "front surface" mirror

I think I understand what you mean but do those mirror exist in half transparent?
for my project I need a mirror that would reflect half of the light and let 50% trough.
even if they exist I'm not sure to find them in france and I think this kind of product may be complicated to ship internationally

This is a first surface mirror: http://astroprofspage.com/wp-content/up ... irrors.jpg" onclick="window.open(this.href);return false;

Most "beam splitters" are first surface.

and LCD projectors that are polarized at 45° or 135°

you mean LCD monitors right?
I didn't look at the polarisation of my lcd's yet, it was very hard to find 2 15" that would be suitable for DIY project but I read somewhere that if the polarisation is wrongly oriented, I can take the filters off to apply new ones. it won't probably be very simple but to me, this project is meant to learn some technical aspect more than to give the best results.
of course I hope it will work great but the most important is what I can learn from it, as it is my first atempt to create such a project.

I haven't tried it with the wrong polarized LCD, but the people on these forums tell me to use a "wave retarder", but I would rather just get the correct screens.

To check use properly polarized glasses ( http://www.berezin.com/3d/3dglasses.htm#Polarized" onclick="window.open(this.href);return false; ) :

I would strongly suggest that the 2 projectors have separate light paths (two lenses at the output). You will have bad results if you attempt to use a splitter (mirror glass).

naah, that would be too easy LOL, I want to try with a splitter first to see if I can come up with some solution, anyway I bought 2 lenses just in case the result is too bad, then I'll use them to create a more conventional setup

Well, the light output of a home-made projector will be bad enough, if you try to add a splitter it won't get any better.

Try to go to a glass shop and ask them about a half-silvered or half-mirrored glass, they might have some, then you don't pay money for shipping.

I would build 2 projectors, then project them onto the same surface. One of them should shine on a standard mirror first. (I have done this with projectors that I purchased, it works fine.)