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Topic: 3D spinning disk

Julio Roberto
Jedi Master Film Handler

Posts: 938
From: Madrid, Madrid, Spain
Registered: Oct 2008

posted 02-08-2009 09:28 AM

quote: Mark Gulbrandsen
No, we didn't use Colorlink... we used the xcompany that makes the polorizer film they use. There are but two polorizer film manufacturers in the States. A couple of other manufactuyrers use the silver deposited method and the filters they produce are not very large but can take tremendous heat levels.

Oh, I assumed, since you said you were using the company that did "RealD's". My mistake, sorry. But, unless half a dozen have closed recently, there are more than 2 manufacturers of film polarizer in the US, although indeed lately 90% of them are in Asia.

If you used iodine polarizers, they will indeed inmediately degrade if they ever reach 90ºc. If you used dyes, a bit more, like 110ºc, which, of course, they will never ever reach [Smile]

.

http://www.apioptics.com/3d-projection-filters.html

But, besides metal deposited wire grids or reflective types, there are other dichroic, inexpensive, commercially available film polarizers that are virtually "indestructable" and basically inmune to the browning or fading or yellowing or decay of iodine or dye based ones and don't need some of the optical stack that colorlink's uses for the glass lamination. Actually they are so stable and inert to enviroment and luminous flux they don't need lamination at all.

Similar to this one by 3M, currently the largest US sheet film polarizer manufacturer:

http://solutions.3m.com/KEPolarizer/

As you know, LCD and Lcos projectors, such as Sony's DCinema projector, use polarizers basically the size of their imaging chip/prism assembly (i.e. 1"x1") and still take all the continous luminous flux for years (of each primary color, but still like the equivalent to >1Kw xenon, in less than an square inch i.e.)

Of course, always important to keep UV/IR filters/dichroic reflectors in shape on high-power projectors to protect the rest of the optical system from unnecessary wear.

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Mark Gulbrandsen
Resident Trollmaster

Posts: 16657
From: Music City
Registered: Jun 99

posted 02-08-2009 10:46 AM

quote: Julio Roberto
Oh, I assumed, since you said you were using the company that did "RealD's".

No, You miss understood. The company that made ours also makes the film that is used in the Z-Screen. The Z-Screen is indeed assembled by Colorlink!! Far as I know they don't make any filters but buy or farm them out to other entities that specialize in that.

Mark

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Julio Roberto
Jedi Master Film Handler

Posts: 938
From: Madrid, Madrid, Spain
Registered: Oct 2008

posted 02-08-2009 12:19 PM

quote:
No, You miss understood. The company that made ours also makes the film that is used in the Z-Screen. The Z-Screen is indeed assembled by Colorlink!!

Once again, sorry. I did missunderstood when you said you got it from the same people that made the zscreen I thought you meant colorlink rather than one of colorlink's suppliers.

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Matt Fields
Jedi Master Film Handler

Posts: 545
From: Ohio, United States
Registered: Jun 2005

posted 02-09-2009 06:51 AM

Mark-

What is the "normal Distribution method" for the glasses?

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Julio Roberto
Jedi Master Film Handler

Posts: 938
From: Madrid, Madrid, Spain
Registered: Oct 2008

posted 02-09-2009 07:05 AM

I'm sure Mark will answer, but I'm guessing he may be referring as to how traditionally the film's distributors had provided the glasses for the movie, generally always free of charge to the theaters, as they were able to purchase very large quantities for all the runs in all the theaters in the country or even abroad for all the (3D) movies they distributed during the year. At such quantities the cost was so low that it didn't matter.

You may ask the distributor to obtain circular polarized glasses for you and supply them with the movie. Unfortunately, since the most used systems TODAY rely in other methods of distribution (i.e. RealD supplies glasses on an royalty agreement direct with them and you purchase Dolby's through distributors directly), they may be not so inclined to support such business models with Master Image or Dual Projection setups.

But it's worth a try and if distributors weren't pig-headed about it and so in love with RealD ... they would work on the principle of "The client (the theaters) is alway right" and move the industry away from the "monopoly" realD was meant to be.

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Matt Fields
Jedi Master Film Handler

Posts: 545
From: Ohio, United States
Registered: Jun 2005

posted 02-09-2009 08:27 AM

I have already installed a Dolby system (Very happy with it), I just wondered what the business model for Master Image was.

One of the appeals of the Dolby system is that the glasses, in the long run, are not very expensive, at least compared to the Real D fees.

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Mark Gulbrandsen
Resident Trollmaster

Posts: 16657
From: Music City
Registered: Jun 99

posted 02-09-2009 09:35 AM

The model is that you can buy it outright or lease it. The lease is so much down... very reasonable amount but don't remember exactly how much... it won't break your bank! Then so much a month and if memory serves me about .45 per ticket. The typical 3-D surcharge easily covers the costs. I do know that glasses are .75 each in 3500 quantity because thats how many our customer ordered to get going. Higher quantities brings em down even more. The lease runs 5 years after which it's yours to keep. You can also VERY EASILY MOVE THE UNIT AROUND TO OTHER SCREENS! Or even move it to another location. All that you need is a silver screen at any of the "other" locations.

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Julio Roberto
Jedi Master Film Handler

Posts: 938
From: Madrid, Madrid, Spain
Registered: Oct 2008

posted 02-09-2009 02:27 PM

Mark,

I just got a quote from a supplier to custom make circular projection filters we talked about.

4.2mm, glass, AR, circular, 6"x6", quantity of 5 minimun order, with a frame in acrylic to help mount them, $95 each.

2.2mm glass would be $85.

You could buy the whole raw glass panel, 707x721mm (aprox. 28x29 inches) for $150 square meter (aprox. $60 for the panel) and cut it, seal it and frame it yourself.

Shipping would be extra, of course, from china.

As you can see, no need for them to be too expensive. Factor 50% discounts if you order large-ish quantities.

Circular paper glasses $0.50/ea for 2000 pieces. Plastic "theme park style" (reusable) $0.75/ea for 720 pieces.

Once again, shipping and custom taxes etc from china extra.

I won't even bother quoting prices for linear (instead of circular) polarizer filters or glasses. They are ridicuosly low. Almost half those of circular.

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Mark Gulbrandsen
Resident Trollmaster

Posts: 16657
From: Music City
Registered: Jun 99

posted 02-09-2009 08:45 PM

Sorry Julio, I buy as little as I can from China. My motto is "Be American - Buy American!

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Julio Roberto
Jedi Master Film Handler

Posts: 938
From: Madrid, Madrid, Spain
Registered: Oct 2008

posted 02-09-2009 09:11 PM

quote:
Sorry Julio, I buy as little as I can from China. My motto is "Be American - Buy American!

Your secret is safe with me, Mark [Smile]

. We won't tell that to Master Image, NEC, Barco, Dolby/Infitec, Cinemeccanica, Prevost, Harkness, Sony, Konica, Schneider, Isco, Osram, Irem ... [Wink]

Doesn't Christie make most of the stuff in Canada?

Just kidding [beer]

PD: I know some non-US companies have factories set up in the USA as well ... I'm just joking around, that's all. We don't pre-judge here in Europe and believe in the free market, so we don't mind buying american (or korean or european or chinese, for that matter). Whatever is good and priced right. Or bad but dirt-cheap. Or expensive but incredibly good. Unfortunately most of our stuff around here in Europe is good-but-not-great and priced like if it was made out of gold.

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Mark Gulbrandsen
Resident Trollmaster

Posts: 16657
From: Music City
Registered: Jun 99

posted 02-09-2009 09:55 PM

Julio... To make it clearer the only country I have a problem with is China.

Mark

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David Stambaugh
Film God

Posts: 4021
From: Eugene, Oregon
Registered: Jan 2002

posted 02-09-2009 10:10 PM

quote:
My motto is "Be American - Buy American!

But drive a Land Rover??!! [Wink]

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Julio Roberto
Jedi Master Film Handler

Posts: 938
From: Madrid, Madrid, Spain
Registered: Oct 2008

posted 02-09-2009 10:12 PM

quote: Mark Gulbrandsen
To make it clearer the only country I have a problem with is China.

We all do

Unfortunately (for us, good for them), they'll be the #1 economic and military power in about 20 years, so we better all get used to them [Cool]

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Mark Gulbrandsen
Resident Trollmaster

Posts: 16657
From: Music City
Registered: Jun 99

posted 02-09-2009 10:24 PM

Don't know Julio... they're economic status pretty much parallels ours.. they are also having big economic troubles in China but you don't hear about most of it since the majority of it is suppressed.

Yes, a Land Rover... at least they are our closest Ally. Its been a pretty good Rover too! Ditto for the Hummer.

Mark

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