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Topic: IMAX Linear Polarization

Mark Gulbrandsen
Resident Trollmaster

Posts: 16657
From: Music City
Registered: Jun 99

posted 12-18-2010 06:00 PM

Dave,

The only thing I dislike about Imax is the Liemax conversion. Seriously... it's a dam stupid thing that is going to leave Imax as just a shade of what they once were. The linear glasses are also stupid if not outright retarded. For the record, beyond that I have no grievences against Imax. So I'm not sure where you are comming up with that idea.

Mark

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Gordon McLeod
Film God

Posts: 9532
From: Toronto Ontario Canada
Registered: Jun 99

posted 12-18-2010 06:19 PM

actually linear is far better than circular for both light and cross talk efficiency

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Steve Guttag
We forgot the crackers Gromit!!!

Posts: 12814
From: Annapolis, MD
Registered: Dec 1999

posted 12-18-2010 07:47 PM

Linear is only superior if one holds their head straight. In actual practice...people don't sit that way (except those with perfect posture). I can understand the desire for Linear to get more light but there does need to be a reality-check on how people behave as people as to work effectively works best.

-Steve

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Mark Gulbrandsen
Resident Trollmaster

Posts: 16657
From: Music City
Registered: Jun 99

posted 12-19-2010 11:25 AM

quote: Gordon McLeod
actually linear is far better than circular for both light and cross talk efficiency

Actually this all depends on the transmissive qualities of the filter being discussed. Having had both Linear and Circular polarizers custom manufactured in the last several years one must be aware that there are a number of options as far as transmissivity is concerned. Transmissivity affects crosstalk and there is a middle of the road for both types of filters where one can easily live with the effects of them. In reality though linear is very outdated and very 50's ish! The rest of the world operates just fine with CP... and so could Imax.

@ Steve.... 100% correct.

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Cameron Glendinning
Jedi Master Film Handler

Posts: 845
From: West Ryde, Sydney, NSW Australia
Registered: Dec 2005

posted 01-18-2011 10:25 PM

quote: Cameron Glendinning
I was told that that location now uses circlular glasses now

The person who told me this (who builds commercial 3d camera rigs) was obviously confused! I visited the theatre recently and it was definitly still linear. I doubt that IMAX does offer circular as an option. My apologies for the misinformation!

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