So if that's the "rule" with multiple PJs why should it not also be the case with just two? It seems to me that when blending an infinite number of PJs (VERY hypothetical!) you would have to go RGB RGB RGB RGB. I know - this is hypothetical thinking! With a three-way blend you couldn't have RGB BGR cancellation, as there is an extra RGB to contend with. I keep thinking that a blend doesn't have to be two PJs - it could be three or more. With a 100% overlapping stack (like Art's) there is cancellation, but that's not as obviously the case with a blend. I've been manually "ray tracing" on paper here, but just confusing myself. Instinct tells me that you should go RGB RGB for a blended stack. I can see why this is of benefit with a conventional stack, but I'm not so sure with your blended stack (at least I understand that's what you're aiming for ). Great use for an old 4x3 pannel projectorĬlick to expand. All you then do is cover part of the lens with a piece of card at the right distance and hey presto soft edge. but LCD and DLP projectors can do this really easily beacuse most of them have the zoom and phase built into their software. I know I should not say this in the CRT forum. 1200x1600 on an 801 will make an intersting noise (even more interesting later) The Barco Semu is just thier name for softedge on the later machines (Soft Edge Modulation Unit)īecarefull on the resoltion you choose because the higher you go the less the phosphor is excited and hence the brightness will fall off. I haven't got round to photographing them yet. I have a few 800 and 801s projectors one of which would be good for spares the others have good tubes. You have clearly been out shoping since we spoke and seem to have become the resting place for a lot of kit. Most of the modern ones allow you to over scan and phase the image over to one side or other.
One route you have not explored is to use a video splitter from DVD or what ever source into identical video scallers.
I knew the states have tried this from a PC and failed but that was some time ago I thought I read someone got it to work. If you have to take the tubes out some people find it better to have one set reversed. If your screen has any form of gain on it colourimetry will be a dog. Less than 10% and It will be difficult to allign. Aim to get at least 20% overlap for it to work well. Your placement of the projector will be key. Ironically my cinema would be perfect for this because I have a large beam running down the centre.Īll I can say at this stage is that you have long road to go here. It was along the lines of "that would make an interesting project". (Changed odds following my 12 projector line up for 360 deg projection) Maybe I will fail but along the way I will have tried something new, had a bit of fun, and will accept the "told you so's" of course if I succeed "A large shout of were not worthy" will be heard from the non believers.Ĭurrently the odds are 15% in the blenders favour and 85% against ( Boy I is gonna feel silly if I got that wrong ) The combined tube area becomes almost (within 2% inc. I know there are people out there who dont think this will use any more tube area - I could be wrong - but to date no one has convinced me of that. * I have a fixed 16:9 screen, widescreen from one PJ uses 75% of vertical tube height - hence the masks you see on loads of tubesĪs I calculate 2 PJ with a 25% overlay should use 98.4375% of the vertical tube height - and greatly increase the resolution to a total picture of 2100x1600 and give a 25% increase in brightness per projector, which will mean a % increase in brightness overall not sure how that bit works ! Slight increase in brightness PJ nearer screen - not a main reasonīetter convergance stability PJ nearer screen - not a main reason
My reasons for trying this are as followsUse of more vertical tube size so higher resolution and brightness- My Main Reason (see below*)
$2000 or $3000 - PCI card based - NOT ON GENERAL SALE but current modelsīaro SEMU - I have 2 boards not sure if SEMU or SEMU lite - can only tell when in projector will update as I find outīarco polaris - software for use with projection within domes etc Matrox PJ range of cards - offer 3 & 4 head display with OVERLAY only. Panaram - hardware based - £25,000 - Hardware based Watchout - PC based software - approx cost £4,500 for the software and you need 3 pc's Nvidia Quadro FX cards, others did not get good results from these cards BUT they were using the FX1000, I have on test the FX4000 AGP card, support for edge blending on the FX1000 has been dropped by Nvidia, the FX4000 is still supported. and so it begins.Blending options software, firmware & external equipment I have looked into