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stridsvognen
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| Posted: Wed Jan 14, 2015 8:20 pm Post subject: |
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I cant find any pics of the HFQ 904 lenses, curious if they have the same plastic front.
I cant get into my head how a lens for a curved screen will work on a dome, can someone explain how that works.?
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draganm
Joined: 08 Mar 2006
Posts: 8990
Location: Colorado
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| Posted: Wed Jan 14, 2015 8:26 pm Post subject: |
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| stridsvognen wrote: | | I cant get into my head how a lens for a curved screen will work on a dome, can someone explain how that works.? |
simple, if you take bunch of curved screens and put them all together it will make a dome 
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stridsvognen
Guest
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| Posted: Wed Jan 14, 2015 8:30 pm Post subject: |
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| draganm wrote: | | stridsvognen wrote: | | I cant get into my head how a lens for a curved screen will work on a dome, can someone explain how that works.? |
simple, if you take bunch of curved screens and put them all together it will make a dome |
Ok, just never seen a curved screen who is curved both vertical and horizontal.
http://www.zanogroup.com/products.html
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gjaky
Joined: 05 Jun 2010
Posts: 2802
Location: Budapest, Hungary
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| Posted: Wed Jan 14, 2015 8:39 pm Post subject: |
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| stridsvognen wrote: | | draganm wrote: | | stridsvognen wrote: | | I cant get into my head how a lens for a curved screen will work on a dome, can someone explain how that works.? |
simple, if you take bunch of curved screens and put them all together it will make a dome |
Ok, just never seen a curved screen who is curved both vertical and horizontal.
http://www.zanogroup.com/products.html |
CRT curved lenses are made for screens curved in both directions, for example HD10R5 lens is for screens (sphere) with radius of 5m.
_________________
projectors in the past : NEC 6-9PG xtra, Electrohome Marquee 6-7500, NEC XG 1351 LC ( with super modified Electrohome VNB neckboard !!!)
current: VDC Marquee 9500LC
The MOD: VNB-DB, VIM-DB
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Curt Palme
CRT Tech
Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC
TV/Projector: All of them!
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| Posted: Wed Jan 14, 2015 8:39 pm Post subject: |
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CRT (or digital) based planetariums have a 360 degree dome X about 160 degrees. 5 projectors do the sides, and one does the top part of the dome.
Below shows an installation that I've seen. The far projector shoots about 13m across to the far side, the close one is the dome projector, about 7m up.
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redfox001
Joined: 16 Mar 2009
Posts: 2257
Location: The Netherlands
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| Posted: Wed Jan 14, 2015 8:50 pm Post subject: |
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I guess 35800 hours. What does the winner get? 
_________________
701s->runco933->8500ultra->cinemax->9500mp->919 splitpack + cinemax
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stridsvognen
Guest
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| Posted: Wed Jan 14, 2015 9:05 pm Post subject: |
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| redfox001 wrote: | | I guess 35800 hours. What does the winner get? |
The winner will get a free ticket to enter my planetarium when its ready. 
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redfox001
Joined: 16 Mar 2009
Posts: 2257
Location: The Netherlands
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| Posted: Wed Jan 14, 2015 11:15 pm Post subject: |
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Why is nobody guessing anymore?
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701s->runco933->8500ultra->cinemax->9500mp->919 splitpack + cinemax
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stridsvognen
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| Posted: Thu Jan 22, 2015 6:43 pm Post subject: |
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Everything is arranged, leaving from here around 3.30 Am.
Thanks for all the inputs.
Topic closed.
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thewolfman
Joined: 28 Mar 2011
Posts: 1311
Location: Sweden
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| Posted: Thu Jan 22, 2015 6:50 pm Post subject: |
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Withdrawn.
Last edited by thewolfman on Fri Jan 23, 2015 1:00 am; edited 1 time in total
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draganm
Joined: 08 Mar 2006
Posts: 8990
Location: Colorado
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| Posted: Thu Jan 22, 2015 8:31 pm Post subject: |
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| stridsvognen wrote: | Thanks for all the inputs.
Topic closed. |
wow, they made you a moderator now ? Ooops, topic's still open, your doing a terrible job. 
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redfox001
Joined: 16 Mar 2009
Posts: 2257
Location: The Netherlands
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| Posted: Fri Jan 23, 2015 2:06 pm Post subject: |
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There is someone in Texas right now
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701s->runco933->8500ultra->cinemax->9500mp->919 splitpack + cinemax
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Spanky Ham
Joined: 22 Mar 2006
Posts: 5643
Location: Comedy Central
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| Posted: Sat Jan 24, 2015 2:51 am Post subject: |
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There are a lot of people in Texas. Matter of fact, the population is about double that of the Netherlands.
Oh, I guess you mean Kurt.
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