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Author Topic: Curved Seating?
Andrew McCrea
Jedi Master Film Handler

Posts: 645
From: Winnipeg, Manitoba, Canada
Registered: Nov 2000


 - posted 02-18-2001 09:49 AM      Profile for Andrew McCrea   Author's Homepage   Email Andrew McCrea   Send New Private Message       Edit/Delete Post 
What do you think of curved seating. Do you think auditoriums should have curved seating and a curved screen?

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Andrew McCrea

"I'm Not Bad, I'm Just Drawn That Way!" - Jessica Rabbit

Darryl Spicer
Film God

Posts: 3250
From: Lexington, KY, USA
Registered: Dec 2000


 - posted 02-18-2001 10:59 AM      Profile for Darryl Spicer     Send New Private Message       Edit/Delete Post 
Answered in the Perfect Ausitorium post.

John Pytlak
Film God

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


 - posted 02-18-2001 11:00 AM      Profile for John Pytlak   Author's Homepage   Email John Pytlak   Send New Private Message       Edit/Delete Post 
Theatres that use matte white (gain=1) screens that reflect light in all directions should always install the screen flat. Otherwise, cross-reflections will be a "contrast killer".

A directional gain screen needs to be curved, such that the light is reflected toward the center of the audience. This can best be done by "ray tracing", or following "rules of thumb" such as SMPTE Recommended Practice RP95. A gain screen installed flat will tend to be difficult to light uniformly, especially where the throw is short and the audience is seated close to the screen.

A really deep curved screen like the D-150 or Cinerama systems used needs to be designed carefully (e.g., Cinerama "strip screen") to avoid cross-reflections. They also tend to have much more of a "sweet spot" for optimum viewing, with objectionable geometric distortion outside of the "sweet spot".

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John P. Pytlak, Senior Technical Specialist
Worldwide Technical Services, Entertainment Imaging
Eastman Kodak Company
Research Labs, Building 69, Room 7419
Rochester, New York, 14650-1922 USA
Tel: 716-477-5325 Cell: 716-781-4036 Fax: 716-722-7243
E-Mail: john.pytlak@kodak.com
Web site: http://www.kodak.com/go/motion




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