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» Film-Tech Forum   » Operations   » Film Handlers' Forum   » Detailed information about the "Optiverter"

   
Author Topic: Detailed information about the "Optiverter"
Max Biela
Film Handler

Posts: 89
From: Dortmund, Germany
Registered: Sep 2003


 - posted 07-31-2008 04:01 AM      Profile for Max Biela   Email Max Biela   Send New Private Message       Edit/Delete Post 
Hi,

does anybody have more detailed information about the optiverter? Or even pictures? It would be interesting to know how they prevented projector noise to escape from the booth..

Thanks

Max [Smile]

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Tim Reed
Better Projection Pays

Posts: 5242
From: Northampton, PA
Registered: Sep 1999


 - posted 07-31-2008 09:16 PM      Profile for Tim Reed   Author's Homepage     Send New Private Message       Edit/Delete Post 
This was the Wil-Kin mirror thing that went between the two projectors? For the ultimate theatre, Omnivision (or whatever they called it)?

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Richard Fowler
Film God

Posts: 2387
From: Ft. Lauderdale, FL, USA
Registered: Jun 2001


 - posted 08-01-2008 01:04 AM      Profile for Richard Fowler   Email Richard Fowler   Send New Private Message       Edit/Delete Post 
The optiverter was part of the UltraVision premium projection concept. the unit allowed two projectors to hit the screen from a perfect centerpoint of a curved screen. It involved matching lenses and reflectors. Glenn Berggren who later was involved in the ISCO and Schneider lens designs currently in use, worked on the system when he was with Wil-kin. Single projector with a film transport makes this concept obsolete [Wink]

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Max Biela
Film Handler

Posts: 89
From: Dortmund, Germany
Registered: Sep 2003


 - posted 08-01-2008 02:40 AM      Profile for Max Biela   Email Max Biela   Send New Private Message       Edit/Delete Post 
Yes, but how did it actually look like? I need to know the exact arrangement of the mirrors. John P. mentioned some photos in an old SMPTE book IIRC...

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Louis Bornwasser
Film God

Posts: 4423
From: prospect ky usa
Registered: Mar 2005


 - posted 08-01-2008 05:52 AM      Profile for Louis Bornwasser   Author's Homepage   Email Louis Bornwasser   Send New Private Message       Edit/Delete Post 
The projectors were "toed in" at about 45 degrees. toward the wall's perfect centerline. At that location was a solenoid operated prism, much like an old telecine at a TV station. (yellow when dirty like old Superscope anamorphics) Louis

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Mitchell Dvoskin
Phenomenal Film Handler

Posts: 1813
From: West Milford, NJ, USA
Registered: Jan 2001


 - posted 08-02-2008 10:14 AM      Profile for Mitchell Dvoskin   Email Mitchell Dvoskin   Send New Private Message       Edit/Delete Post 
From SMPTE's 1969 Motion Picture Projection & Theatre Presentation Manual:

"Ultra-Vision is a new projection system specifically designed to eliminate projection and viewing problems encountered with any 35mm or 70mm picture presentation. It is claimed that with its use total sharpness, contrast and color control are substantially superior with any format, and the the results are measurable."

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Andy Frodsham
Expert Film Handler

Posts: 238
From: Stoke on Trent, Staffs, UK
Registered: Nov 2006


 - posted 08-03-2008 07:24 AM      Profile for Andy Frodsham   Email Andy Frodsham   Send New Private Message       Edit/Delete Post 
I assume, perhaps wrongly, that the extra prisms had an adverse effect on the picture quality? Great idea though.

We have a really short throw in our theatre and such a device would help a lot!!!

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Jim Cassedy
Phenomenal Film Handler

Posts: 1523
From: San Francisco, CA
Registered: Dec 2006


 - posted 08-06-2008 09:43 PM      Profile for Jim Cassedy   Email Jim Cassedy   Send New Private Message       Edit/Delete Post 
Ta Dah! I knew I had a picture of an "OPTIVERTER" here somewhere.
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This picture, which shows the Optiverter set-up in the Terrace Theater in Hickory North Carolina, is from "The Motion Picture Projection and Theater Presentation Manual" published by SMPTE in 1969.

EDIT: OOPS! Obviously, I didn't see the previous message before posting this!

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Max Biela
Film Handler

Posts: 89
From: Dortmund, Germany
Registered: Sep 2003


 - posted 08-07-2008 03:31 AM      Profile for Max Biela   Email Max Biela   Send New Private Message       Edit/Delete Post 
Thanks everyone [Smile]

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