NUI Group - Open Source Interface

Cheap protective layer for Endlighten?

2010-03-20T14:44:01-05:00

So I want to protect my precious expensive Endlighten from scratches and smudges but cannot afford to spend tons of money on exotic materials like 7D006; what should I do to protect my acrylic layer? Right now I am just laying resume paper on my acrylic layer so I am not blinded by the projected image and I will probably use tracing paper as my diffusion layer. But what should I put on top of my acrylic to protect it cheaply?

I have seen a lot of people saying that finger touches can’t be seen too well with glass so what else is there? <3mm acrylic?

Does Frosted Glass still require a Compliant Surface Added?

2010-03-19T13:30:10-05:00

Hey, gang;

Working on my own project here in the US, and I’m looking at Evonik’s Satin Ice for my RDI surface.

Do I still need to add a foil layer to this? Or will it capture enough of the projection and allow IR to pass through on it’s own?

If I need a foil layer, what would you suggest would be my best options?

Thanks!

How to make & mount the compliant layer onto acrylic?

2010-03-19T12:08:16-05:00

Hello!

I bought a 8mm Plexiglas and Digiline Contrast as projection layer. Now I have to make the compliant layer.

One side is self-adhesive, so I think I have to put the silicone on it, right?!

Is this done, I have to mount the compliant layer onto the acrylic, but there should not be contact. So I have to install the layer 1-2mm over the acrylic?!
But how could I do this with my 1,2m x 0,9m FTIR wall system? Should I put the edges of the complian/projection layer into the u profile where the leds are in?
Then I can make around the border a 1-2mm height spacer, so the whole layer is over the acrylic.

Does anyone know?

Best Regards PHANTOMIAS

LEE 255 NEUTRAL DENSITY FROST in a LLP?

2010-03-18T17:34:17-05:00

Hello, sorry about my english…
i need to know if the diffuser LEE 255 NEUTRAL DENSITY FROST, is recommended for LLP setup.
thanks,!

DSI-Setup with Satin Ice

2010-03-18T03:19:15-05:00

Hi everyone,

I trying to change a FTIR-Setup to a DSI-Setup by exchanging the acrylic layer to a Plexiglas Endlighten table top (10 mm). I tested several materials for the compliance-layer to protect the Endlighten and to display the projector image. At the end, architectural paper was the best (and the cheapest). However, I still want to protect the Endlighten with a more robust layer and would like to take Satin Ice (3mm thick). The results of my tests were good, but still I´m struggeling with the decision to order that plate. Did anyone has made experiance with that matieral?

Thanks for you help

greetings
Andy

Compliant Surface worsens blobs…

2010-03-18T03:33:32-05:00

I’m at a loss here:
For my FTIR-LCD i tried 2 methods till now: pouring the silicone directly onto the acryllic and tinkerman’s method. Both produce no blobs at all...even bare acryllic gives me better results...am I doing something wrong? Is the silicone wrong? I’m using elastic sanitary-silicone…

Thanks in advance
Ness

bendy surfaces?

2010-03-17T13:54:39-05:00

Hey, can anyone tell me how to calculate how much a surface will bend under different supports and forces and tensions. and at what point that will break the surface. I can see a few different things will need to be known about it and im pretty proficient at mechanics. Can anyone help?

plexiglass IR transparent: ISO 3557 - value 91?

2010-03-16T04:18:07-05:00

I’d like to create a new DSI setup and I’m planning to build a nice plexiglass case which covers also the top part.
How can I verify that the plexiglass I plan to buy is transparent to IR (800nm)?

I contacted the european vendor and they just sent me the technical sheet of the plexiglass which only says that it is ISO 3557 compliant with value 91.
Does it mean anything to you?

thanks a lot & regards,
blackdir

Tinkermans method - Casting Textured Silcone

2008-07-06T19:53:21-05:00

I’m pleased that my technique for applying textured silicone to vellum is working for the people who have tried it.
Cheers!

In the interest of making this even easier, I’ve improved on the technique to apply the silicone.

I now thin it with Zylol at a 1:1 ratio, mix well, and pour it onto the vellum. Here’s the cool part that makes it easy-peasy.
I roll it out over the surface with a foam rubber paint roller like the ones they have at hardware stores.
The texture produced is micro-bumps on the surface. I applied two coats, and now the silicone layer is about half the thickness of the squeegie/fabric technique!

It produces blobs with a light touch, but it still needs a few more coats to be as sensative as the squeegie style sheet. With this technique of application, it’s even easier to get a good, even coat of silicone onto the vellum so building it up in several layers is not so hard to do. It just takes a little wait time between coats. I waited an hour on the first one. It felt like it was cured up pretty well after 30 minutes, but I gave it another 30 minutes to be sure it wouldn’t lift.

I think I’ll make more and do about 5 or 6 coats.

Here’s a how-to video I made:

[youtube]http://www.youtube.com/watch?v=vvO_lvyDGVo[/youtube]

You can clean the roller pretty easily with the zylol and a rag. Just get the roller wetted out with the zylol, then roll out the excess onto the rag. Dispose of the rag in a fireproof container or hang it to dry. NEVER put solvent soaked rags in the trash. They can self ignite.

Have fun rollin the silicone!

an interesting finding

2010-03-16T08:49:04-05:00

Today, I introduced my FTIR table to my 5 year old daughter who just walked into my work room to show me a pastel drawing she had done. Anyways, she saw me change the top sheet and noticed that the projector shone straight up, so she put her drawing on the bare acrylic to see if her drawing would project onto the ceiling. ofcourse it did not. but she happened to have placed it ‘pastel side down’ and when I tried to flaten it on the table I noticed that it created blobs. yep pastel, I guess since it is oil based, is compliant. I got blobs about 70% the brightness of my textured silicon on tracing paper

anyways, I dont expect anyone to go coloring a piece of paper end to end with pastel but I though I would share the story