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TheyDroppedMe
Joined: 25 Oct 2009
Posts: 28
Location: Atlanta, GA
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| Posted: Wed Oct 28, 2009 3:32 pm Post subject: |
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Well, I went to look at rtart's 9PG Xtra yesterday, and everything looked great. The red and blue tubes were easily in condition "9" and as expected, the green tube was in condition 6-7 ish, but the wear was even and over the full size of the raster. It has the HD144's, as well as a set of extra lenses. He's also going to throw in a complete spare 6pg xtra (minus tubes), so I'll have a boatload of spare parts. For the price, I think it's a steal, so I'm going to be picking it up this afternoon (and I'm excited like it's christmas!).
Once I get it set up this weekend, I'll be posting some screenshots for you guys. I also ordered an HDfury2 and GammaX, so I'll be feeding it 1080i60 from TurboHD and Vudu, and 1080i72 from my htpc.
Looks like I've found my new addiction.
Greg
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Kiev Savoie
Joined: 25 Oct 2007
Posts: 432
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| Posted: Thu Oct 29, 2009 1:24 am Post subject: |
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| TheyDroppedMe wrote: | | About the AR coating, the coating I'm referring to is a brand new technique of self-depositing polymeric anti-reflective coating based on the structure of the moth's eyes. When I got to work with it in lab, the results were unbelievable - glass that had been coated with it was virtually invisible and COMPLETELY unreflective. |
if you can get that to work and deposit it on Polycarbonate lenses Kal will set you up as a third party vendor in the Curt Palme marketplace 
I can think of dozens of people who would love to eliminate Haloing on AC lenses without the enormous head-ache of LC chambers. hell,I'll be first in line............[/quote]
I think I saw an article or two about a similar moth eye nano technology being developed to make solar panels less reflective to boost their efficiency. I didn't think about it at the time but this sounds like it would make a lens more efficient at doing it's job too. If it works as well as you say it does, I would think that a lens assembly for a projector treated with this process would not only eliminate haloing, but also produce a brighter image than current LC or AC configurations. Is your professor experimenting with lenses at all? This could be huge for optics!
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AnalogRocks
Forum Moderator
Joined: 08 Mar 2006
Posts: 26706
Location: Toronto, Ontario, Canada
TV/Projector: Sony 1252Q, AMPRO 4000G
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| Posted: Thu Oct 29, 2009 1:30 am Post subject: |
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Wouldn't you have to coat all the element's that face the tube and maybe the front element facing the screen to avoid reflections?
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TheyDroppedMe
Joined: 25 Oct 2009
Posts: 28
Location: Atlanta, GA
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| Posted: Thu Oct 29, 2009 1:59 am Post subject: |
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If I'm thinking correctly (using my new NEC 9PG Xtra's lens setup as the reference) only the glass of the lens facing the tubes should need to be coated, and/or any glass in front of the tube. The glass closest to the tube is likely the one causing the majority of the reflections (~4% reflectance for the old AR technology probably used on these guys), and is the one that would make the biggest difference. Anyone know how hot the front of the tube gets during use? If the temperature gets higher than the glass transition point (Tg) of the polymer moth-eye coating, the nano-structure will degrade quickly, and could render the coating cloudy if cooled wrong.
On a side note, I just picked up my NEC 9PG Xtra today, and the guy I bought it from threw in all the parts from a spare 6 PG Xtra. Now, he told me the lenses on the 9PG Xtra are the HD144's, but he didn't know what the spare lenses are. How do I tell what kind of lenses they are, and would anyone like to buy them?
Thanks,
Greg
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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| Posted: Thu Oct 29, 2009 2:43 am Post subject: |
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| TheyDroppedMe wrote: | thanks for the help guys. I went to look at the NEC, and it had pretty bad wear/ a pretty good burn of the ESPN ticker, so I'm going to pass on that one.
Strangely enough, I found another NEC 9PG Xtra for sale by the user rtart on another forum, who originally bought it from Curt. It's about the same price, and comes with just about everything I would need, plus he has offered to help me set it up, so I'm going to look at that one and hopefully get it. Strange how things work out sometimes
About the AR coating, the coating I'm referring to is a brand new technique of self-depositing polymeric anti-reflective coating based on the structure of the moth's eyes. When I got to work with it in lab, the results were unbelievable - glass that had been coated with it was virtually invisible and COMPLETELY unreflective. We were testing the deposition method, and as a final test we would check the reflectivity with both a lamp and several lasers - if it weren't for the testing equipment, I honestly wouldn't have been able to see where the light was hitting it at all. Super cool stuff (the lab write up was a royal PITA though). Who knows, maybe he'll let me play with the stuff.
-Greg |
Will it work on acrylic lenses? I think most lenses have that and not glass IIRC. I have a set of HD GT17's that have the AR coating scratched to where I cant use them. If i take off those lense elements I can send them to you t see if it will work on them.
Here is a repost of my lenses, it be cool if it works I can send you the one i removed now and if it works send the other two. I'll even pay for material if its not too crazy.
| Quote: | ok here is a previous post i had about my scratched HD-10GT17's
| Quote: | here are some pics water and lightly pulling a tissue wont cut it i think 
Lens 1
Lens 2
Sucks huh !
I tried some fine cut car polish by hand on one it didn't do any good but it didn't do any harm either as you can see it looked the same as when i got them, the third lens isn't as bad and i think it will be fine these are another story, what do you think?
Are the HD10 lenses that same I have a set of those I could try to remove these and swap them? Is it possible?
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Well I was reading to posts on the C-elements and if its possible to have them tinted...I then began thinking of my poor useless HD10Gt17's and decided to take off the bottom lens or at least see if its possible with just regular tools......here are the results.  Now i am going to look at the HD 10's and see how close they are, maybe a swap will fix them? Or i am sending them out to that Optics place i mentioned in the other thread. The lens is still in a smaller aluminum ring but That I don,t want to attempt to remove. Maybe the coating place can add the coating with the Ring attached?
I put Cellophane over the lens so it wont get any dust inside.
yeah i was Bored.......
Athanasios |
Nashou
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TheyDroppedMe
Joined: 25 Oct 2009
Posts: 28
Location: Atlanta, GA
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| Posted: Thu Oct 29, 2009 3:18 am Post subject: |
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Nashou66 - haha somebody's excited about the possibility huh? But please, no one get your hopes up just yet about sending me your lenses - it's just an idea I had. I have much more research to do before I can figure out if it's even possible or would work well. There's so many variables that could render the idea useless - the tubes could get above the glass transition temperature of the polymer coating, the polymer might not stick to acryllic, the coating might cause the image to look overly soft/blurry (it works fine on a sheet of glass, but adding magnification could expose it's weaknesses), the consistency of the coating might not be good enough for optics, and worst of all - contracts/grants might prevent my old professor from even telling me how to do it myself!
But these are all questions that can be answered, and problems that can eventually be solved. Whether or not it would be cost effective is another issue altogether...
As an alternative, do any of you people involved with photography know of any companies that will apply a new multi-layer (not as good as moth-eye, but probably more suited for optics {less refraction} and drastically better than the AR tech in the mid-90's) on your optics? Maybe someone who works at a eyeglasses factory could do the same, but the question is the same - any companies that will coat your optics? It would probably be much cheaper to put together a "group buy" and get a bunch of our lenses coated with the 2nd best AR technology.
Well that's all I have for now,
Greg
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Spanky Ham
Joined: 22 Mar 2006
Posts: 5643
Location: Comedy Central
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| Posted: Mon Nov 02, 2009 9:36 pm Post subject: |
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Greg,
The most important part would be the glass facing the face of the tube. If what you are saying is true, then you could achieve LC performance with an AC pj. I am not sure how much benefit there would be with a LC pj. Supposedly, they are pretty low to begin with. My guess is that ANSI is maxed out until there is a way to make the inside of the lenses blacker. There is a new material that has a very low reflection percentage. I don't think it is available for retail sale yet. Something like this material lining the lenses and your AR may give CRTs the ability to hit higher ANSI contrast. If CRT could get to 500 to 1 ANSI, then you might have some digital zealots running back to CRT.
If you have the ability to play with this and want to give it a try, then I could help you with it. I will be back in Atl in December.
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Spanky Ham
Joined: 22 Mar 2006
Posts: 5643
Location: Comedy Central
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| Posted: Sat Dec 19, 2009 9:08 pm Post subject: |
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Greg,
Any updates? I am headed back to Atlanta, so if you want to take a look at this then I am game.
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