CurtPalme.com Home Theater Forum

Tim in Phoenix · Joined: 21 Oct 2006 Posts: 4409 Location: Phoenix

Preferrably spray-on, what can you tell me?

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jeffslife · Joined: 17 Apr 2010 Posts: 4190 Location: ohio usa

Coating for what purpose?

Tim in Phoenix · Joined: 21 Oct 2006 Posts: 4409 Location: Phoenix

Hello

To minimize or eliminate unwanted reflections, nothing to do with projectors.

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zGman · Joined: 22 May 2006 Posts: 599

As you may know - AR coatings for lenses are vacuum deposited 1/4 and 1/2 wavelength
thick layers of different refractive index materials which in the right combination create
a boundary condition which does not allow reflection. These can be quite complex, and
have some issues of bandwidth and entry angle.

http://en.wikipedia.org/wiki/Optical_coating

http://en.wikipedia.org/wiki/Anti-reflective_coating

There is another method which uses an etching process to create a gradual change
in refractive index which reduces reflection. I forget the name of the process,
it has been used for plastics, but not something that can be sprayed on.

You may be able to purchase AR glass for projection windows etc,

http://www.evaporatedcoatings.com/plastic.htm

http://www.pgo-online.com/intl/katalog/antireflection.html

G

jask · Joined: 17 Mar 2006 Posts: 10187 Location: kamloops BC

Do you need to retain the transparency? how consistent does the finish need to be?

Gerbrand · Joined: 13 May 2008 Posts: 199

Tim in Phoenix · Joined: 21 Oct 2006 Posts: 4409 Location: Phoenix

David_Web · Joined: 02 May 2007 Posts: 418 Location: Sweden

You could try contacting the manufacturer directly, if there is something that works they should probably know of it.
http://www.arkema-inc.com/index.cfm

Or maybe these guys could help.
http://www.eplastics.com/

Maybe a thin layer of anti-reflective/refractive treated material could be laminated on top of the Plexiglas.

Tom.W · Joined: 09 Mar 2006 Posts: 6635

This article might help..........

http://www.screentekinc.com/pixelbright-lcds.shtml#anti-reflect

jask · Joined: 17 Mar 2006 Posts: 10187 Location: kamloops BC

I would try something like this:
http://solutions.3m.com/wps/portal/3M/en_US/Vikuiti1/BrandProducts/main/marketsweserve/displayaftermarket/antireflectionfilms/

also, not sure if they make anything that big.. but I would contact these guys:
http://www.youtube.com/watch?v=9IZQvuUyyl0

ervinburch · Guest

There is no coating requires for plexiglasses. I think it can be used without coating easily.
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non glare plexiglass

macgyver655 · Joined: 22 Aug 2007 Posts: 8508

Well how about that. A spammer whose spam actually pertains to the threads subject..... Interesting... cudos on the effort...

**AnalogRocks** · Posted: Sat Dec 22, 2012 9:25 pm Post subject:

stefuel · Posted: Mon Dec 24, 2012 11:40 am Post subject:

Take a piece of plexiglass and lay it down on a flat surface. Get some 600 grit wet/dry sand paper and put it on a dual action sander. Mix up a solution of soap and water. (just enough soap for lubrication). Then work your way around the plex with the sander to just take off the gloss. Then hold it up to the LCD you wish to use and see if it provides the effect you want. You can even go finer then 600.