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TOPIC: How important is curving for small screen.

How important is curving for small screen. 18 Jul 2002 03:53 #27860

fevzigenc OFFLINE Fresh Boarder Posts: 9 Karma: 0	Hi all, I have a small screen (220mm*517mm). My question is; Is curving neccesary for my screen. What is the benefit to curve.. Thanks
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Re: How important is curving for small screen. 18 Jul 2002 04:45 #27861

Ken Layton OFFLINE Platinum Boarder Posts: 851 Thank you received: 1 Karma: 0	Forget the curve. You don't need it.
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Re: How important is curving for small screen. 18 Jul 2002 05:31 #27862

Mike OFFLINE Administrator Posts: 4826 Thank you received: 32 Karma: 13	Masking is more important than curve on any screen other than the largest
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Re: How important is curving for small screen. 18 Jul 2002 06:27 #27863

John Pytlak
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You should NOT curve a low gain ("matte") screen.

A gain screen should be curved to efficiently reflect the light to the prime seating area of the auditorium. This can be done by "ray tracing", or following the guidelines in SMPTE Recommended Practice RP95. Gain screens that are not properly curved will be difficult to illuminate uniformly, without having "hot spots" and falloff.

John P. Pytlak, Senior Technical Specialist
Worldwide Technical Services
Entertainment Imaging
Research Labs, Building 69, Room 7525A
Eastman Kodak Company
Rochester, NY 14650-1922
Telephone: 585-477-5325 Cell: 585-781-4036 Fax: 585-722-7243
E-Mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it
Website: http://www.kodak.com/go/motion

John P. Pytlak, Senior Technical Specialist
Customer Technical Services
Entertainment Imaging
Research Labs, Building 69, Room 7525A
Eastman Kodak Company
Rochester, NY 14650-1922
Telephone: +1 585-477-5325 Fax: +1 585-722-7243
E-Mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it
Website: http://www.kodak.com/go/motion

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Re: How important is curving for small screen. 18 Jul 2002 08:48 #27864

Large OFFLINE Platinum Boarder Posts: 1074 Thank you received: 1 Karma: 0	And I have heard that modern projection lenses are ground with the flat screen in mind.
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Re: How important is curving for small screen. 20 Jul 2002 00:41 #27865

fevzigenc OFFLINE Fresh Boarder Posts: 9 Karma: 0	Thank you or your help.. Fevzi
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Re: How important is curving for small screen. 06 Aug 2002 09:44 #27866

mesbursmith
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Fevzi

I just got back from vacation so I didn't see your question. I think you must mean your screen is 220 x 517 cm, not mm. Generally, we do not consider curved screens which are less than 12 meters in width. Even larger screens are often better flat. The best curved screen theatre we've designed had a 26 meter x 14 meter high high gain screen in a 923 seat auditorium. The response from John Pytlak is excellent advice. I have seen too many theatres with curved screens with distorted images and uneven illumination because the screens were not properly configured.

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