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Topic: Who Is Installing Digital Projection For "Chicken Little"?

Wolff King Morrow
Master Film Handler

Posts: 490
From: Denton, TX, USA
Registered: Feb 2004

posted 11-21-2005 02:35 AM

The image is projected from one machine. The left and right eyes are running at 72fps each, or 144 total from what I understand. Since the left and right eye are polarized, you can only see one or the other with the glasses, but it "appears" as if both are showing at the same time when you take the glasses off. In reality, they are alternating at a high rate of speed. This is how that glass overhang is able to polarize every other image. It's merely sync-timed to the machine (correct me if I'm wrong, its just what I gather from my own observations).

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John Pytlak
Film God

Posts: 9987
From: Rochester, NY 14650-1922
Registered: Jan 2000

posted 11-21-2005 05:45 AM

quote: Paul Linfesty
I saw TWO beams of light coming from the old projection booth way up high, each from the seperate portals. So what's up with this? Are left and right images being projected from two seperate projectors?

Although the system used at ShowEast and most installations use one projector, it wouldn't surprise me if some installations used two projectors to get more light on the screen, as poor light efficiency is a current limitation. Maybe Ted Costas or someone at Dolby or RealD could comment? [Confused]

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Paul Linfesty
Phenomenal Film Handler

Posts: 1383
From: Bakersfield, CA, USA
Registered: Nov 1999

posted 11-21-2005 09:25 AM

quote: Wolff King Morrow
It's merely sync-timed to the machine

So this is not just a static piece of glass, but it actually is changing on every frame shown? How does it work?

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Wolff King Morrow
Master Film Handler

Posts: 490
From: Denton, TX, USA
Registered: Feb 2004

posted 11-21-2005 11:20 AM

I think so. There is a communication cable going from that glass into the Barco unit, so it can't be just a piece of glass.

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Ron Yost
Master Film Handler

Posts: 344
From: Paso Robles, CA
Registered: Aug 2003

posted 11-21-2005 12:25 PM

Re: The El Capitan, Hollywood

John Ledwon, the organist at Disney's El Capitan Theatre in Hollywood posted the following on the theatreorgan list yesterday:

"...Here at the El Capitan (I've just finished show 4 of 6 today...and still sold out on the third weekend) we have 3 digital projectors...two showing the double image 3D, another digital projector equipped with an electronic polarizing system running back-up and also film running a third back-up.

John Ledwon"
---------

Ron Yost

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John Pytlak
Film God

Posts: 9987
From: Rochester, NY 14650-1922
Registered: Jan 2000

posted 11-21-2005 12:34 PM

Using a separate digital projector for each "eye" certainly should at least double the available light level. Not necessarily a practical solution for most theatres, but the El Capitan is Disney's "Flagship" theatre. Having both a digital "backup" and a film "backup" shows how important this venue is to them.

What is the largest screen being used for the single projector RealD system?

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Mark J. Marshall
Film God

Posts: 3188
From: New Castle, DE, USA
Registered: Aug 2002

posted 11-21-2005 12:39 PM

Circular polarization is explained over here.

Using that explaination, I'm assuming that the linear polarization doen't change on the thing in front of the projector. But the quarter-wave plate is what changes back and forth on the projector, and that causes the light to either spiral in a clockwise or a counter-clockwise direction (circular polarization).

I don't even understand fully what a quarter-wave plate is except that it slows light down in a way that causes linearly polarized light to spiral into circularly polarized light. So I'm not sure what's involved in making the quarter-wave plate change back and forth. Anyone know?

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John Pytlak
Film God

Posts: 9987
From: Rochester, NY 14650-1922
Registered: Jan 2000

posted 11-21-2005 12:56 PM

Here's a link to a fairly good PowerPoint presentation about the technology:

http://www.etconsult.com/papers/HPA%203D%20presentation.pdf

And Joe Kleiman's article:

http://www.worldenteractive.com/reald.htm

quote:
More than three years ago, the two joined forces to create REAL D, with the goal of transforming 3D cinema using digital projection technology. In February, REAL D acquired StereoGraphics Corporation, founded by 3D pioneer Lenny Lipton in 1980 to develop alternating-field 3D video and computer technology that makes use of liquid crystal shuttering 3D glasses. On May 12 of this year, REAL D announced the appointment of Joseph Peixoto, former CEO of UK cinema chain UCI and former president of Canadian circuit Famous Players, to the position of President of Worldwide Cinema. REAL D plans to have over 1000 of their systems installed by next year, the first 100 of which will go online this fall to showcase a digital 3D version of Disney’s upcoming CG feature “Chicken Little.”

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Paul Linfesty
Phenomenal Film Handler

Posts: 1383
From: Bakersfield, CA, USA
Registered: Nov 1999

posted 11-21-2005 06:47 PM

quote: Ron Yost
two showing the double image 3D

Well, this is what I suspected, and was kind of a disapointment (of course what I was seeing was probably superior to what "Disney Digital 3-D" is). This sounds kind of weird, i guess (it's like going to HTWWW and expecting to see a 35mm scope 4-track mag print and being let down when they showed a 3-panel Cinerama print with 7-channel stereo). However, my main intent was to see how good this new single projection technology is, and what I got was basically the old and tested 2-projection system adapted to digital.

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Mark J. Marshall
Film God

Posts: 3188
From: New Castle, DE, USA
Registered: Aug 2002

posted 11-21-2005 06:59 PM

Paul, did you notice any strobing effects during scenes with a lot of motion, or was the motion pretty smooth? I'm trying to figure out if that is a result of digital projection of digitally generated content, or a result of the field sequential nature of the single projector system, or a little bit of both.

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Paul Linfesty
Phenomenal Film Handler

Posts: 1383
From: Bakersfield, CA, USA
Registered: Nov 1999

posted 11-22-2005 12:35 AM

Mark, the only strobing I noticed were for negative parallax shots (which were few and far between), such as the little particles that rapidly came out of the screen. Other that, everything else was very smooth.

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Wolff King Morrow
Master Film Handler

Posts: 490
From: Denton, TX, USA
Registered: Feb 2004

posted 11-22-2005 04:54 AM

D'oh! nvm.

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Louis Bornwasser
Film God

Posts: 4441
From: prospect ky usa
Registered: Mar 2005

posted 11-22-2005 05:46 AM

Note that their backup backup is film....the old reliable. Louis

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Joseph L. Kleiman
Master Film Handler

Posts: 380
From: Sacramento, CA
Registered: Apr 2005

posted 11-22-2005 01:33 PM

John,

Thanks for posting the link to our REAL D interview. It's actually a three parter. The other parts are at

http://www.worldenteractive.com/realdpt2.htm
and
http://www.worldenteractive.com/realdpt3.htm

I can also confirm that the El Capitan, along with a couple of other larger auditoriums are using two projectors to increase the light output.

As for the lack of positive-Z action, we posted an article by Ray Zone that explains the reasoning behind this:

http://www.worldenteractive.com/rayzonecl.htm

Joe

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John Pytlak
Film God

Posts: 9987
From: Rochester, NY 14650-1922
Registered: Jan 2000

posted 11-22-2005 03:53 PM

quote: Joseph L. Kleiman
I can also confirm that the El Capitan, along with a couple of other larger auditoriums are using two projectors to increase the light output.

Sorry we had to learn about the need to use two projectors to light larger screens by deduction, rather than as part of the technical information shared with the industry. [Roll Eyes]

Although anyone who was at ShowEast realized the single projector demo was on one of the smaller screens at the Pleasure Island AMC, rather than the two big ones used for the other Digital Cinema and film presentations.

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