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stefuel
Joined: 07 Mar 2006
Posts: 3353
Location: Green Harbor MA USA
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| Posted: Fri Oct 12, 2007 2:30 am Post subject: One for the torus guy's |
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I'm considering building one for the setup I have in the garage. (which is no longer a garage but a work-shop) Is there a formula for choosing the radius of the screen. Also, when considering radius, where do you place the point of origin of the radius. I'm working on a way to build a accurate mold to form one out of fiberglass 8)
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Chip
A Barco is only a AmPro with training wheels
Card carrying member of the AVS chain gang.
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Z-Photo
Joined: 07 Mar 2006
Posts: 2749
Location: Huntsville - Alabama
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| Posted: Fri Oct 12, 2007 2:45 am Post subject: |
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Cool
A cross-eyed Ampro
Thats a new one.......
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The Only GOOD AMPRO - is a Dead AMPRO.
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-Pjackso
Joined: 31 Mar 2006
Posts: 791
Location: Oklahoma
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| Posted: Fri Oct 12, 2007 4:14 am Post subject: |
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Chip,
Here's a spreadsheet I developed quite some time back to calculate a mathematically accurate torus. It outputs the top/bottom/side torus profile dimensions. It'll also calculate the overall torus radius (F).
I put the torus focal point at the viewer.
Hope it helps.
| Description: |
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Torus calculator explained v2.xls |
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104.5 KB |
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267 Time(s) |
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AnalogRocks
Forum Moderator
Joined: 08 Mar 2006
Posts: 26706
Location: Toronto, Ontario, Canada
TV/Projector: Sony 1252Q, AMPRO 4000G
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| Posted: Fri Oct 12, 2007 5:02 am Post subject: |
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How would you 'hollow out' your screen material? Or would you just bend plywood to match those curves?
Is this screen good for more than one viewer? When I plugged my numbers in it seems like a very small viewing cone. Maximum Torus Depth was 41.41" wild.
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